1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000
3 Free Software Foundation, Inc.
4 Contributed by Gary Funck (gary@intrepid.com).
5 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
6 Extensively modified by Jason Merrill (jason@cygnus.com).
8 This file is part of GNU CC.
10 GNU CC is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 GNU CC is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GNU CC; see the file COPYING. If not, write to
22 the Free Software Foundation, 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
25 /* TODO: Implement .debug_str handling, and share entries somehow.
26 Eliminate duplicates by putting common info in a separate section
27 to be collected by the linker and referring to it with
29 Emit .debug_line header even when there are no functions, since
30 the file numbers are used by .debug_info. Alternately, leave
31 out locations for types and decls.
32 Avoid talking about ctors and op= for PODs.
33 Factor out common prologue sequences into multiple CIEs. */
35 /* The first part of this file deals with the DWARF 2 frame unwind
36 information, which is also used by the GCC efficient exception handling
37 mechanism. The second part, controlled only by an #ifdef
38 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
47 #include "hard-reg-set.h"
49 #include "insn-config.h"
55 #include "dwarf2out.h"
61 /* We cannot use <assert.h> in GCC source, since that would include
62 GCC's assert.h, which may not be compatible with the host compiler. */
67 # define assert(e) do { if (! (e)) abort (); } while (0)
70 /* Decide whether we want to emit frame unwind information for the current
76 return (write_symbols == DWARF2_DEBUG
77 #ifdef DWARF2_FRAME_INFO
80 #ifdef DWARF2_UNWIND_INFO
82 || (flag_exceptions && ! exceptions_via_longjmp)
87 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
89 /* How to start an assembler comment. */
90 #ifndef ASM_COMMENT_START
91 #define ASM_COMMENT_START ";#"
94 typedef struct dw_cfi_struct *dw_cfi_ref;
95 typedef struct dw_fde_struct *dw_fde_ref;
96 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
98 /* Call frames are described using a sequence of Call Frame
99 Information instructions. The register number, offset
100 and address fields are provided as possible operands;
101 their use is selected by the opcode field. */
103 typedef union dw_cfi_oprnd_struct
105 unsigned long dw_cfi_reg_num;
106 long int dw_cfi_offset;
107 const char *dw_cfi_addr;
108 struct dw_loc_descr_struct *dw_cfi_loc;
112 typedef struct dw_cfi_struct
114 dw_cfi_ref dw_cfi_next;
115 enum dwarf_call_frame_info dw_cfi_opc;
116 dw_cfi_oprnd dw_cfi_oprnd1;
117 dw_cfi_oprnd dw_cfi_oprnd2;
121 /* This is how we define the location of the CFA. We use to handle it
122 as REG + OFFSET all the time, but now it can be more complex.
123 It can now be either REG + CFA_OFFSET or *(REG + BASE_OFFSET) + CFA_OFFSET.
124 Instead of passing around REG and OFFSET, we pass a copy
125 of this structure. */
126 typedef struct cfa_loc
131 int indirect; /* 1 if CFA is accessed via a dereference. */
134 /* All call frame descriptions (FDE's) in the GCC generated DWARF
135 refer to a single Common Information Entry (CIE), defined at
136 the beginning of the .debug_frame section. This used of a single
137 CIE obviates the need to keep track of multiple CIE's
138 in the DWARF generation routines below. */
140 typedef struct dw_fde_struct
142 const char *dw_fde_begin;
143 const char *dw_fde_current_label;
144 const char *dw_fde_end;
145 dw_cfi_ref dw_fde_cfi;
150 /* Maximum size (in bytes) of an artificially generated label. */
151 #define MAX_ARTIFICIAL_LABEL_BYTES 30
153 /* Make sure we know the sizes of the various types dwarf can describe. These
154 are only defaults. If the sizes are different for your target, you should
155 override these values by defining the appropriate symbols in your tm.h
158 #ifndef CHAR_TYPE_SIZE
159 #define CHAR_TYPE_SIZE BITS_PER_UNIT
162 /* The size of the target's pointer type. */
164 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
167 /* The size of addresses as they appear in the Dwarf 2 data.
168 Some architectures use word addresses to refer to code locations,
169 but Dwarf 2 info always uses byte addresses. On such machines,
170 Dwarf 2 addresses need to be larger than the architecture's
172 #ifndef DWARF2_ADDR_SIZE
173 #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
176 /* The size in bytes of a DWARF field indicating an offset or length
177 relative to a debug info section, specified to be 4 bytes in the
178 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same
181 #ifndef DWARF_OFFSET_SIZE
182 #define DWARF_OFFSET_SIZE 4
185 #define DWARF_VERSION 2
187 /* Round SIZE up to the nearest BOUNDARY. */
188 #define DWARF_ROUND(SIZE,BOUNDARY) \
189 ((((SIZE) + (BOUNDARY) - 1) / (BOUNDARY)) * (BOUNDARY))
191 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
192 #ifdef STACK_GROWS_DOWNWARD
193 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
195 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
198 /* A pointer to the base of a table that contains frame description
199 information for each routine. */
200 static dw_fde_ref fde_table;
202 /* Number of elements currently allocated for fde_table. */
203 static unsigned fde_table_allocated;
205 /* Number of elements in fde_table currently in use. */
206 static unsigned fde_table_in_use;
208 /* Size (in elements) of increments by which we may expand the
210 #define FDE_TABLE_INCREMENT 256
212 /* A list of call frame insns for the CIE. */
213 static dw_cfi_ref cie_cfi_head;
215 /* The number of the current function definition for which debugging
216 information is being generated. These numbers range from 1 up to the
217 maximum number of function definitions contained within the current
218 compilation unit. These numbers are used to create unique label id's
219 unique to each function definition. */
220 static unsigned current_funcdef_number = 0;
222 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
223 attribute that accelerates the lookup of the FDE associated
224 with the subprogram. This variable holds the table index of the FDE
225 associated with the current function (body) definition. */
226 static unsigned current_funcdef_fde;
228 /* Forward declarations for functions defined in this file. */
230 static char *stripattributes PARAMS ((const char *));
231 static const char *dwarf_cfi_name PARAMS ((unsigned));
232 static dw_cfi_ref new_cfi PARAMS ((void));
233 static void add_cfi PARAMS ((dw_cfi_ref *, dw_cfi_ref));
234 static unsigned long size_of_uleb128 PARAMS ((unsigned long));
235 static unsigned long size_of_sleb128 PARAMS ((long));
236 static void output_uleb128 PARAMS ((unsigned long));
237 static void output_sleb128 PARAMS ((long));
238 static void add_fde_cfi PARAMS ((const char *, dw_cfi_ref));
239 static void lookup_cfa_1 PARAMS ((dw_cfi_ref, dw_cfa_location *));
240 static void lookup_cfa PARAMS ((dw_cfa_location *));
241 static void reg_save PARAMS ((const char *, unsigned,
243 static void initial_return_save PARAMS ((rtx));
244 static void output_cfi PARAMS ((dw_cfi_ref, dw_fde_ref));
245 static void output_call_frame_info PARAMS ((int));
246 static void dwarf2out_stack_adjust PARAMS ((rtx));
247 static void dwarf2out_frame_debug_expr PARAMS ((rtx, const char *));
249 /* Support for complex CFA locations. */
250 static void output_cfa_loc PARAMS ((dw_cfi_ref));
251 static void get_cfa_from_loc_descr PARAMS ((dw_cfa_location *,
252 struct dw_loc_descr_struct *));
253 static struct dw_loc_descr_struct *build_cfa_loc
254 PARAMS ((dw_cfa_location *));
255 static void def_cfa_1 PARAMS ((const char *, dw_cfa_location *));
257 /* Definitions of defaults for assembler-dependent names of various
258 pseudo-ops and section names.
259 Theses may be overridden in the tm.h file (if necessary) for a particular
262 #ifdef OBJECT_FORMAT_ELF
263 #ifndef UNALIGNED_SHORT_ASM_OP
264 #define UNALIGNED_SHORT_ASM_OP ".2byte"
266 #ifndef UNALIGNED_INT_ASM_OP
267 #define UNALIGNED_INT_ASM_OP ".4byte"
269 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
270 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
272 #endif /* OBJECT_FORMAT_ELF */
275 #define ASM_BYTE_OP ".byte"
278 /* Data and reference forms for relocatable data. */
279 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
280 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
282 /* Pseudo-op for defining a new section. */
283 #ifndef SECTION_ASM_OP
284 #define SECTION_ASM_OP ".section"
287 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
288 print the SECTION_ASM_OP and the section name. The default here works for
289 almost all svr4 assemblers, except for the sparc, where the section name
290 must be enclosed in double quotes. (See sparcv4.h). */
291 #ifndef SECTION_FORMAT
292 #ifdef PUSHSECTION_FORMAT
293 #define SECTION_FORMAT PUSHSECTION_FORMAT
295 #define SECTION_FORMAT "\t%s\t%s\n"
299 #ifndef FRAME_SECTION
300 #define FRAME_SECTION ".debug_frame"
303 #ifndef FUNC_BEGIN_LABEL
304 #define FUNC_BEGIN_LABEL "LFB"
306 #ifndef FUNC_END_LABEL
307 #define FUNC_END_LABEL "LFE"
309 #define CIE_AFTER_SIZE_LABEL "LSCIE"
310 #define CIE_END_LABEL "LECIE"
311 #define CIE_LENGTH_LABEL "LLCIE"
312 #define FDE_AFTER_SIZE_LABEL "LSFDE"
313 #define FDE_END_LABEL "LEFDE"
314 #define FDE_LENGTH_LABEL "LLFDE"
316 /* Definitions of defaults for various types of primitive assembly language
317 output operations. These may be overridden from within the tm.h file,
318 but typically, that is unnecessary. */
320 #ifndef ASM_OUTPUT_SECTION
321 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
322 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
325 #ifndef ASM_OUTPUT_DWARF_DATA1
326 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
327 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
330 #ifndef ASM_OUTPUT_DWARF_DELTA1
331 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
332 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
333 assemble_name (FILE, LABEL1); \
334 fprintf (FILE, "-"); \
335 assemble_name (FILE, LABEL2); \
339 #ifdef UNALIGNED_INT_ASM_OP
341 #ifndef UNALIGNED_OFFSET_ASM_OP
342 #define UNALIGNED_OFFSET_ASM_OP \
343 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
346 #ifndef UNALIGNED_WORD_ASM_OP
347 #define UNALIGNED_WORD_ASM_OP \
348 ((DWARF2_ADDR_SIZE) == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP \
349 : (DWARF2_ADDR_SIZE) == 2 ? UNALIGNED_SHORT_ASM_OP \
350 : UNALIGNED_INT_ASM_OP)
353 #ifndef ASM_OUTPUT_DWARF_DELTA2
354 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
355 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
356 assemble_name (FILE, LABEL1); \
357 fprintf (FILE, "-"); \
358 assemble_name (FILE, LABEL2); \
362 #ifndef ASM_OUTPUT_DWARF_DELTA4
363 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
364 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
365 assemble_name (FILE, LABEL1); \
366 fprintf (FILE, "-"); \
367 assemble_name (FILE, LABEL2); \
371 #ifndef ASM_OUTPUT_DWARF_DELTA
372 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
373 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
374 assemble_name (FILE, LABEL1); \
375 fprintf (FILE, "-"); \
376 assemble_name (FILE, LABEL2); \
380 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
381 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
382 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
383 assemble_name (FILE, LABEL1); \
384 fprintf (FILE, "-"); \
385 assemble_name (FILE, LABEL2); \
389 #ifndef ASM_OUTPUT_DWARF_ADDR
390 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
391 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
392 assemble_name (FILE, LABEL); \
396 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
397 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,RTX) \
399 fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
400 output_addr_const ((FILE), (RTX)); \
404 #ifndef ASM_OUTPUT_DWARF_OFFSET4
405 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
406 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
407 assemble_name (FILE, LABEL); \
411 #ifndef ASM_OUTPUT_DWARF_OFFSET
412 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
413 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
414 assemble_name (FILE, LABEL); \
418 #ifndef ASM_OUTPUT_DWARF_DATA2
419 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
420 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
423 #ifndef ASM_OUTPUT_DWARF_DATA4
424 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
425 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
428 #ifndef ASM_OUTPUT_DWARF_DATA8
429 #define ASM_OUTPUT_DWARF_DATA8(FILE,VALUE) \
430 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_DOUBLE_INT_ASM_OP, \
431 (unsigned long) (VALUE))
434 #ifndef ASM_OUTPUT_DWARF_DATA
435 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
436 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
437 (unsigned long) (VALUE))
440 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
441 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
442 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
443 (unsigned long) (VALUE))
446 #ifndef ASM_OUTPUT_DWARF_CONST_DOUBLE
447 #define ASM_OUTPUT_DWARF_CONST_DOUBLE(FILE,HIGH_VALUE,LOW_VALUE) \
449 if (WORDS_BIG_ENDIAN) \
451 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
452 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
456 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
457 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
462 #else /* UNALIGNED_INT_ASM_OP */
464 /* We don't have unaligned support, let's hope the normal output works for
467 #ifndef ASM_OUTPUT_DWARF_ADDR
468 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
469 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), DWARF2_ADDR_SIZE, 1)
472 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
473 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,RTX) ASM_OUTPUT_DWARF_ADDR (FILE,RTX)
476 #ifndef ASM_OUTPUT_DWARF_OFFSET4
477 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
478 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
481 #ifndef ASM_OUTPUT_DWARF_OFFSET
482 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
483 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
486 #ifndef ASM_OUTPUT_DWARF_DELTA2
487 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
488 assemble_integer (gen_rtx_MINUS (HImode, \
489 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
490 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
494 #ifndef ASM_OUTPUT_DWARF_DELTA4
495 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
496 assemble_integer (gen_rtx_MINUS (SImode, \
497 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
498 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
502 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
503 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
504 assemble_integer (gen_rtx_MINUS (Pmode, \
505 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
506 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
510 #ifndef ASM_OUTPUT_DWARF_DELTA
511 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
512 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
515 #ifndef ASM_OUTPUT_DWARF_DATA2
516 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
517 assemble_integer (GEN_INT (VALUE), 2, 1)
520 #ifndef ASM_OUTPUT_DWARF_DATA4
521 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
522 assemble_integer (GEN_INT (VALUE), 4, 1)
525 #endif /* UNALIGNED_INT_ASM_OP */
528 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
529 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
531 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
532 assemble_name (FILE, SY); \
534 assemble_name (FILE, HI); \
536 assemble_name (FILE, LO); \
539 #endif /* SET_ASM_OP */
541 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
542 newline is produced. When flag_debug_asm is asserted, we add commentary
543 at the end of the line, so we must avoid output of a newline here. */
544 #ifndef ASM_OUTPUT_DWARF_STRING
545 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
547 register int slen = strlen(P); \
548 register const char *p = (P); \
550 fprintf (FILE, "\t.ascii \""); \
551 for (i = 0; i < slen; i++) \
553 register int c = p[i]; \
554 if (c == '\"' || c == '\\') \
560 fprintf (FILE, "\\%o", c); \
563 fprintf (FILE, "\\0\""); \
568 /* The DWARF 2 CFA column which tracks the return address. Normally this
569 is the column for PC, or the first column after all of the hard
571 #ifndef DWARF_FRAME_RETURN_COLUMN
573 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
575 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
579 /* The mapping from gcc register number to DWARF 2 CFA column number. By
580 default, we just provide columns for all registers. */
581 #ifndef DWARF_FRAME_REGNUM
582 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
585 /* Hook used by __throw. */
588 expand_builtin_dwarf_fp_regnum ()
590 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
593 /* The offset from the incoming value of %sp to the top of the stack frame
594 for the current function. */
595 #ifndef INCOMING_FRAME_SP_OFFSET
596 #define INCOMING_FRAME_SP_OFFSET 0
599 /* Return a pointer to a copy of the section string name S with all
600 attributes stripped off, and an asterisk prepended (for assemble_name). */
606 char *stripped = xmalloc (strlen (s) + 2);
611 while (*s && *s != ',')
618 /* Generate code to initialize the register size table. */
621 expand_builtin_init_dwarf_reg_sizes (address)
625 enum machine_mode mode = TYPE_MODE (char_type_node);
626 rtx addr = expand_expr (address, NULL_RTX, VOIDmode, 0);
627 rtx mem = gen_rtx_MEM (mode, addr);
629 i = MIN (FIRST_PSEUDO_REGISTER, DWARF_FRAME_REGISTERS);
632 int offset = DWARF_FRAME_REGNUM (i) * GET_MODE_SIZE (mode);
633 int size = GET_MODE_SIZE (reg_raw_mode[i]);
638 emit_move_insn (change_address (mem, mode,
639 plus_constant (addr, offset)),
644 /* Convert a DWARF call frame info. operation to its string name */
647 dwarf_cfi_name (cfi_opc)
648 register unsigned cfi_opc;
652 case DW_CFA_advance_loc:
653 return "DW_CFA_advance_loc";
655 return "DW_CFA_offset";
657 return "DW_CFA_restore";
661 return "DW_CFA_set_loc";
662 case DW_CFA_advance_loc1:
663 return "DW_CFA_advance_loc1";
664 case DW_CFA_advance_loc2:
665 return "DW_CFA_advance_loc2";
666 case DW_CFA_advance_loc4:
667 return "DW_CFA_advance_loc4";
668 case DW_CFA_offset_extended:
669 return "DW_CFA_offset_extended";
670 case DW_CFA_restore_extended:
671 return "DW_CFA_restore_extended";
672 case DW_CFA_undefined:
673 return "DW_CFA_undefined";
674 case DW_CFA_same_value:
675 return "DW_CFA_same_value";
676 case DW_CFA_register:
677 return "DW_CFA_register";
678 case DW_CFA_remember_state:
679 return "DW_CFA_remember_state";
680 case DW_CFA_restore_state:
681 return "DW_CFA_restore_state";
683 return "DW_CFA_def_cfa";
684 case DW_CFA_def_cfa_register:
685 return "DW_CFA_def_cfa_register";
686 case DW_CFA_def_cfa_offset:
687 return "DW_CFA_def_cfa_offset";
688 case DW_CFA_def_cfa_expression:
689 return "DW_CFA_def_cfa_expression";
691 /* SGI/MIPS specific */
692 case DW_CFA_MIPS_advance_loc8:
693 return "DW_CFA_MIPS_advance_loc8";
696 case DW_CFA_GNU_window_save:
697 return "DW_CFA_GNU_window_save";
698 case DW_CFA_GNU_args_size:
699 return "DW_CFA_GNU_args_size";
700 case DW_CFA_GNU_negative_offset_extended:
701 return "DW_CFA_GNU_negative_offset_extended";
704 return "DW_CFA_<unknown>";
708 /* Return a pointer to a newly allocated Call Frame Instruction. */
710 static inline dw_cfi_ref
713 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
715 cfi->dw_cfi_next = NULL;
716 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
717 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
722 /* Add a Call Frame Instruction to list of instructions. */
725 add_cfi (list_head, cfi)
726 register dw_cfi_ref *list_head;
727 register dw_cfi_ref cfi;
729 register dw_cfi_ref *p;
731 /* Find the end of the chain. */
732 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
738 /* Generate a new label for the CFI info to refer to. */
741 dwarf2out_cfi_label ()
743 static char label[20];
744 static unsigned long label_num = 0;
746 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
747 ASM_OUTPUT_LABEL (asm_out_file, label);
752 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
753 or to the CIE if LABEL is NULL. */
756 add_fde_cfi (label, cfi)
757 register const char *label;
758 register dw_cfi_ref cfi;
762 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
765 label = dwarf2out_cfi_label ();
767 if (fde->dw_fde_current_label == NULL
768 || strcmp (label, fde->dw_fde_current_label) != 0)
770 register dw_cfi_ref xcfi;
772 fde->dw_fde_current_label = label = xstrdup (label);
774 /* Set the location counter to the new label. */
776 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
777 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
778 add_cfi (&fde->dw_fde_cfi, xcfi);
781 add_cfi (&fde->dw_fde_cfi, cfi);
785 add_cfi (&cie_cfi_head, cfi);
788 /* Subroutine of lookup_cfa. */
791 lookup_cfa_1 (cfi, loc)
792 register dw_cfi_ref cfi;
793 register dw_cfa_location *loc;
795 switch (cfi->dw_cfi_opc)
797 case DW_CFA_def_cfa_offset:
798 loc->offset = cfi->dw_cfi_oprnd1.dw_cfi_offset;
800 case DW_CFA_def_cfa_register:
801 loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
804 loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
805 loc->offset = cfi->dw_cfi_oprnd2.dw_cfi_offset;
807 case DW_CFA_def_cfa_expression:
808 get_cfa_from_loc_descr (loc, cfi->dw_cfi_oprnd1.dw_cfi_loc);
815 /* Find the previous value for the CFA. */
819 register dw_cfa_location *loc;
821 register dw_cfi_ref cfi;
823 loc->reg = (unsigned long) -1;
826 loc->base_offset = 0;
828 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
829 lookup_cfa_1 (cfi, loc);
831 if (fde_table_in_use)
833 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
834 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
835 lookup_cfa_1 (cfi, loc);
839 /* The current rule for calculating the DWARF2 canonical frame address. */
842 /* The register used for saving registers to the stack, and its offset
844 dw_cfa_location cfa_store;
846 /* The running total of the size of arguments pushed onto the stack. */
847 static long args_size;
849 /* The last args_size we actually output. */
850 static long old_args_size;
852 /* Entry point to update the canonical frame address (CFA).
853 LABEL is passed to add_fde_cfi. The value of CFA is now to be
854 calculated from REG+OFFSET. */
857 dwarf2out_def_cfa (label, reg, offset)
858 register const char *label;
867 def_cfa_1 (label, &loc);
870 /* This routine does the actual work. The CFA is now calculated from
871 the dw_cfa_location structure. */
873 def_cfa_1 (label, loc_p)
874 register const char *label;
875 dw_cfa_location *loc_p;
877 register dw_cfi_ref cfi;
878 dw_cfa_location old_cfa, loc;
883 if (cfa_store.reg == loc.reg && loc.indirect == 0)
884 cfa_store.offset = loc.offset;
886 loc.reg = DWARF_FRAME_REGNUM (loc.reg);
887 lookup_cfa (&old_cfa);
889 if (loc.reg == old_cfa.reg && loc.offset == old_cfa.offset &&
890 loc.indirect == old_cfa.indirect)
892 if (loc.indirect == 0)
895 if (loc.base_offset == old_cfa.base_offset)
901 if (loc.reg == old_cfa.reg && loc.indirect == old_cfa.indirect)
903 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
904 cfi->dw_cfi_oprnd1.dw_cfi_offset = loc.offset;
907 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
908 else if (loc.offset == old_cfa.offset && old_cfa.reg != (unsigned long) -1
909 && loc.indirect == old_cfa.indirect)
911 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
912 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg;
916 else if (loc.indirect == 0)
918 cfi->dw_cfi_opc = DW_CFA_def_cfa;
919 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg;
920 cfi->dw_cfi_oprnd2.dw_cfi_offset = loc.offset;
924 struct dw_loc_descr_struct * loc_list;
925 cfi->dw_cfi_opc = DW_CFA_def_cfa_expression;
926 loc_list = build_cfa_loc (&loc);
927 cfi->dw_cfi_oprnd1.dw_cfi_loc = loc_list;
930 add_fde_cfi (label, cfi);
933 /* Add the CFI for saving a register. REG is the CFA column number.
934 LABEL is passed to add_fde_cfi.
935 If SREG is -1, the register is saved at OFFSET from the CFA;
936 otherwise it is saved in SREG. */
939 reg_save (label, reg, sreg, offset)
940 register const char *label;
941 register unsigned reg;
942 register unsigned sreg;
943 register long offset;
945 register dw_cfi_ref cfi = new_cfi ();
947 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
949 /* The following comparison is correct. -1 is used to indicate that
950 the value isn't a register number. */
951 if (sreg == (unsigned int) -1)
954 /* The register number won't fit in 6 bits, so we have to use
956 cfi->dw_cfi_opc = DW_CFA_offset_extended;
958 cfi->dw_cfi_opc = DW_CFA_offset;
960 offset /= DWARF_CIE_DATA_ALIGNMENT;
963 cfi->dw_cfi_opc = DW_CFA_GNU_negative_offset_extended;
966 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
968 else if (sreg == reg)
969 /* We could emit a DW_CFA_same_value in this case, but don't bother. */
973 cfi->dw_cfi_opc = DW_CFA_register;
974 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
977 add_fde_cfi (label, cfi);
980 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
981 This CFI tells the unwinder that it needs to restore the window registers
982 from the previous frame's window save area.
984 ??? Perhaps we should note in the CIE where windows are saved (instead of
985 assuming 0(cfa)) and what registers are in the window. */
988 dwarf2out_window_save (label)
989 register const char *label;
991 register dw_cfi_ref cfi = new_cfi ();
992 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
993 add_fde_cfi (label, cfi);
996 /* Add a CFI to update the running total of the size of arguments
997 pushed onto the stack. */
1000 dwarf2out_args_size (label, size)
1004 register dw_cfi_ref cfi;
1006 if (size == old_args_size)
1008 old_args_size = size;
1011 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
1012 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
1013 add_fde_cfi (label, cfi);
1016 /* Entry point for saving a register to the stack. REG is the GCC register
1017 number. LABEL and OFFSET are passed to reg_save. */
1020 dwarf2out_reg_save (label, reg, offset)
1021 register const char *label;
1022 register unsigned reg;
1023 register long offset;
1025 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
1028 /* Entry point for saving the return address in the stack.
1029 LABEL and OFFSET are passed to reg_save. */
1032 dwarf2out_return_save (label, offset)
1033 register const char *label;
1034 register long offset;
1036 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1039 /* Entry point for saving the return address in a register.
1040 LABEL and SREG are passed to reg_save. */
1043 dwarf2out_return_reg (label, sreg)
1044 register const char *label;
1045 register unsigned sreg;
1047 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1050 /* Record the initial position of the return address. RTL is
1051 INCOMING_RETURN_ADDR_RTX. */
1054 initial_return_save (rtl)
1057 unsigned int reg = (unsigned int) -1;
1060 switch (GET_CODE (rtl))
1063 /* RA is in a register. */
1064 reg = DWARF_FRAME_REGNUM (REGNO (rtl));
1067 /* RA is on the stack. */
1068 rtl = XEXP (rtl, 0);
1069 switch (GET_CODE (rtl))
1072 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1077 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1079 offset = INTVAL (XEXP (rtl, 1));
1082 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1084 offset = -INTVAL (XEXP (rtl, 1));
1091 /* The return address is at some offset from any value we can
1092 actually load. For instance, on the SPARC it is in %i7+8. Just
1093 ignore the offset for now; it doesn't matter for unwinding frames. */
1094 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1096 initial_return_save (XEXP (rtl, 0));
1102 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset);
1105 /* Check INSN to see if it looks like a push or a stack adjustment, and
1106 make a note of it if it does. EH uses this information to find out how
1107 much extra space it needs to pop off the stack. */
1110 dwarf2out_stack_adjust (insn)
1116 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1118 /* Extract the size of the args from the CALL rtx itself. */
1120 insn = PATTERN (insn);
1121 if (GET_CODE (insn) == PARALLEL)
1122 insn = XVECEXP (insn, 0, 0);
1123 if (GET_CODE (insn) == SET)
1124 insn = SET_SRC (insn);
1125 assert (GET_CODE (insn) == CALL);
1126 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1130 /* If only calls can throw, and we have a frame pointer,
1131 save up adjustments until we see the CALL_INSN. */
1132 else if (! asynchronous_exceptions
1133 && cfa.reg != STACK_POINTER_REGNUM)
1136 if (GET_CODE (insn) == BARRIER)
1138 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1139 the compiler will have already emitted a stack adjustment, but
1140 doesn't bother for calls to noreturn functions. */
1141 #ifdef STACK_GROWS_DOWNWARD
1142 offset = -args_size;
1147 else if (GET_CODE (PATTERN (insn)) == SET)
1152 insn = PATTERN (insn);
1153 src = SET_SRC (insn);
1154 dest = SET_DEST (insn);
1156 if (dest == stack_pointer_rtx)
1158 /* (set (reg sp) (plus (reg sp) (const_int))) */
1159 code = GET_CODE (src);
1160 if (! (code == PLUS || code == MINUS)
1161 || XEXP (src, 0) != stack_pointer_rtx
1162 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1165 offset = INTVAL (XEXP (src, 1));
1167 else if (GET_CODE (dest) == MEM)
1169 /* (set (mem (pre_dec (reg sp))) (foo)) */
1170 src = XEXP (dest, 0);
1171 code = GET_CODE (src);
1173 if (! (code == PRE_DEC || code == PRE_INC)
1174 || XEXP (src, 0) != stack_pointer_rtx)
1177 offset = GET_MODE_SIZE (GET_MODE (dest));
1182 if (code == PLUS || code == PRE_INC)
1191 if (cfa.reg == STACK_POINTER_REGNUM)
1192 cfa.offset += offset;
1194 #ifndef STACK_GROWS_DOWNWARD
1197 args_size += offset;
1201 label = dwarf2out_cfi_label ();
1202 def_cfa_1 (label, &cfa);
1203 dwarf2out_args_size (label, args_size);
1206 /* A temporary register used in adjusting SP or setting up the store_reg. */
1207 static unsigned cfa_temp_reg;
1209 /* A temporary value used in adjusting SP or setting up the store_reg. */
1210 static long cfa_temp_value;
1212 /* If we see a store of the CFA register, remember it in case we later also
1213 copy it into another register. The ARM saves the old SP in the stack,
1214 but it also has a usable FP. */
1215 static unsigned cfa_old_reg;
1217 /* Record call frame debugging information for an expression, which either
1218 sets SP or FP (adjusting how we calculate the frame address) or saves a
1219 register to the stack. */
1222 dwarf2out_frame_debug_expr (expr, label)
1229 /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of
1230 the PARALLEL independantly. The first element is always processed if
1231 it is a SET. This is for backward compatability. Other elements
1232 are processed only if they are SETs and the RTX_FRAME_RELATED_P
1233 flag is set in them. */
1235 if (GET_CODE (expr) == PARALLEL)
1238 int limit = XVECLEN (expr, 0);
1240 for (par_index = 0; par_index < limit; par_index++)
1242 rtx x = XVECEXP (expr, 0, par_index);
1244 if (GET_CODE (x) == SET &&
1245 (RTX_FRAME_RELATED_P (x) || par_index == 0))
1246 dwarf2out_frame_debug_expr (x, label);
1251 if (GET_CODE (expr) != SET)
1254 src = SET_SRC (expr);
1255 dest = SET_DEST (expr);
1257 switch (GET_CODE (dest))
1260 /* Update the CFA rule wrt SP or FP. Make sure src is
1261 relative to the current CFA register. */
1262 switch (GET_CODE (src))
1264 /* Setting FP from SP. */
1266 if (cfa.reg == (unsigned) REGNO (src)
1267 || (cfa.indirect && cfa_old_reg == (unsigned) REGNO (src)))
1272 /* We used to require that dest be either SP or FP, but the
1273 ARM copies SP to a temporary register, and from there to
1274 FP. So we just rely on the backends to only set
1275 RTX_FRAME_RELATED_P on appropriate insns. */
1276 cfa.reg = REGNO (dest);
1282 if (dest == stack_pointer_rtx)
1285 switch (GET_CODE (XEXP (src, 1)))
1288 offset = INTVAL (XEXP (src, 1));
1291 if ((unsigned) REGNO (XEXP (src, 1)) != cfa_temp_reg)
1293 offset = cfa_temp_value;
1299 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1301 /* Restoring SP from FP in the epilogue. */
1302 if (cfa.reg != (unsigned) HARD_FRAME_POINTER_REGNUM)
1304 cfa.reg = STACK_POINTER_REGNUM;
1306 else if (XEXP (src, 0) != stack_pointer_rtx)
1309 if (GET_CODE (src) == PLUS)
1311 if (cfa.reg == STACK_POINTER_REGNUM)
1312 cfa.offset += offset;
1313 if (cfa_store.reg == STACK_POINTER_REGNUM)
1314 cfa_store.offset += offset;
1316 else if (dest == hard_frame_pointer_rtx)
1318 /* Either setting the FP from an offset of the SP,
1319 or adjusting the FP */
1320 if (! frame_pointer_needed)
1323 if (GET_CODE (XEXP (src, 0)) == REG
1324 && (unsigned) REGNO (XEXP (src, 0)) == cfa.reg
1325 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1327 offset = INTVAL (XEXP (src, 1));
1328 if (GET_CODE (src) == PLUS)
1330 cfa.offset += offset;
1331 cfa.reg = HARD_FRAME_POINTER_REGNUM;
1338 if (GET_CODE (src) != PLUS
1339 || XEXP (src, 1) != stack_pointer_rtx)
1341 if (GET_CODE (XEXP (src, 0)) != REG
1342 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg)
1344 if (cfa.reg != STACK_POINTER_REGNUM)
1346 cfa_store.reg = REGNO (dest);
1347 cfa_store.offset = cfa.offset - cfa_temp_value;
1352 cfa_temp_reg = REGNO (dest);
1353 cfa_temp_value = INTVAL (src);
1357 if (GET_CODE (XEXP (src, 0)) != REG
1358 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg
1359 || (unsigned) REGNO (dest) != cfa_temp_reg
1360 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1362 cfa_temp_value |= INTVAL (XEXP (src, 1));
1368 def_cfa_1 (label, &cfa);
1371 /* Skip over HIGH, assuming it will be followed by a LO_SUM, which
1372 will fill in all of the bits. */
1377 cfa_temp_reg = REGNO (dest);
1378 cfa_temp_value = INTVAL (XEXP (src, 1));
1382 if (GET_CODE (src) != REG)
1385 /* If the src is our current CFA, and it isn't the SP or FP, then we're
1386 going to have to use an indrect mechanism. */
1387 if (REGNO (src) != STACK_POINTER_REGNUM
1388 && REGNO (src) != HARD_FRAME_POINTER_REGNUM
1389 && (unsigned) REGNO (src) == cfa.reg
1390 /* Temporary KLUDGE to make ARM work. */
1391 && GET_CODE (XEXP (dest, 0)) != PRE_DEC)
1393 /* We currently allow this to be ONLY a MEM or MEM + offset. */
1394 rtx x = XEXP (dest, 0);
1396 if (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS)
1398 offset = INTVAL (XEXP (x, 1));
1399 if (GET_CODE (x) == MINUS)
1403 if (GET_CODE (x) != REG)
1405 cfa_old_reg = cfa.reg;
1406 cfa.reg = (unsigned) REGNO (x);
1407 cfa.base_offset = offset;
1409 def_cfa_1 (label, &cfa);
1413 /* Saving a register to the stack. Make sure dest is relative to the
1415 switch (GET_CODE (XEXP (dest, 0)))
1420 offset = GET_MODE_SIZE (GET_MODE (dest));
1421 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1424 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1425 || cfa_store.reg != STACK_POINTER_REGNUM)
1427 cfa_store.offset += offset;
1428 if (cfa.reg == STACK_POINTER_REGNUM)
1429 cfa.offset = cfa_store.offset;
1431 offset = -cfa_store.offset;
1434 /* With an offset. */
1437 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1438 if (GET_CODE (XEXP (dest, 0)) == MINUS)
1441 if (cfa_store.reg != (unsigned) REGNO (XEXP (XEXP (dest, 0), 0)))
1443 offset -= cfa_store.offset;
1446 /* Without an offset. */
1448 if (cfa_store.reg != (unsigned) REGNO (XEXP (dest, 0)))
1450 offset = -cfa_store.offset;
1456 def_cfa_1 (label, &cfa);
1457 dwarf2out_reg_save (label, REGNO (src), offset);
1466 /* Record call frame debugging information for INSN, which either
1467 sets SP or FP (adjusting how we calculate the frame address) or saves a
1468 register to the stack. If INSN is NULL_RTX, initialize our state. */
1471 dwarf2out_frame_debug (insn)
1477 if (insn == NULL_RTX)
1479 /* Set up state for generating call frame debug info. */
1481 if (cfa.reg != (unsigned long) DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1483 cfa.reg = STACK_POINTER_REGNUM;
1490 if (! RTX_FRAME_RELATED_P (insn))
1492 dwarf2out_stack_adjust (insn);
1496 label = dwarf2out_cfi_label ();
1498 src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX);
1500 insn = XEXP (src, 0);
1502 insn = PATTERN (insn);
1504 dwarf2out_frame_debug_expr (insn, label);
1507 /* Return the size of an unsigned LEB128 quantity. */
1509 static inline unsigned long
1510 size_of_uleb128 (value)
1511 register unsigned long value;
1513 register unsigned long size = 0;
1514 register unsigned byte;
1518 byte = (value & 0x7f);
1527 /* Return the size of a signed LEB128 quantity. */
1529 static inline unsigned long
1530 size_of_sleb128 (value)
1531 register long value;
1533 register unsigned long size = 0;
1534 register unsigned byte;
1538 byte = (value & 0x7f);
1542 while (!(((value == 0) && ((byte & 0x40) == 0))
1543 || ((value == -1) && ((byte & 0x40) != 0))));
1548 /* Output an unsigned LEB128 quantity. */
1551 output_uleb128 (value)
1552 register unsigned long value;
1554 unsigned long save_value = value;
1556 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1559 register unsigned byte = (value & 0x7f);
1562 /* More bytes to follow. */
1565 fprintf (asm_out_file, "0x%x", byte);
1567 fprintf (asm_out_file, ",");
1572 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1575 /* Output an signed LEB128 quantity. */
1578 output_sleb128 (value)
1579 register long value;
1582 register unsigned byte;
1583 long save_value = value;
1585 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1588 byte = (value & 0x7f);
1589 /* arithmetic shift */
1591 more = !((((value == 0) && ((byte & 0x40) == 0))
1592 || ((value == -1) && ((byte & 0x40) != 0))));
1596 fprintf (asm_out_file, "0x%x", byte);
1598 fprintf (asm_out_file, ",");
1603 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1606 /* Output a Call Frame Information opcode and its operand(s). */
1609 output_cfi (cfi, fde)
1610 register dw_cfi_ref cfi;
1611 register dw_fde_ref fde;
1613 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1615 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1617 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1619 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1620 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1621 fputc ('\n', asm_out_file);
1624 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1626 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1628 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1630 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1631 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1633 fputc ('\n', asm_out_file);
1634 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1635 fputc ('\n', asm_out_file);
1637 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1639 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1641 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1643 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1644 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1646 fputc ('\n', asm_out_file);
1650 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1652 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1653 dwarf_cfi_name (cfi->dw_cfi_opc));
1655 fputc ('\n', asm_out_file);
1656 switch (cfi->dw_cfi_opc)
1658 case DW_CFA_set_loc:
1659 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1660 fputc ('\n', asm_out_file);
1662 case DW_CFA_advance_loc1:
1663 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1664 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1665 fde->dw_fde_current_label);
1666 fputc ('\n', asm_out_file);
1667 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1669 case DW_CFA_advance_loc2:
1670 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1671 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1672 fde->dw_fde_current_label);
1673 fputc ('\n', asm_out_file);
1674 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1676 case DW_CFA_advance_loc4:
1677 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1678 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1679 fde->dw_fde_current_label);
1680 fputc ('\n', asm_out_file);
1681 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1683 #ifdef MIPS_DEBUGGING_INFO
1684 case DW_CFA_MIPS_advance_loc8:
1685 /* TODO: not currently implemented. */
1689 case DW_CFA_offset_extended:
1690 case DW_CFA_GNU_negative_offset_extended:
1691 case DW_CFA_def_cfa:
1692 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1693 fputc ('\n', asm_out_file);
1694 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1695 fputc ('\n', asm_out_file);
1697 case DW_CFA_restore_extended:
1698 case DW_CFA_undefined:
1699 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1700 fputc ('\n', asm_out_file);
1702 case DW_CFA_same_value:
1703 case DW_CFA_def_cfa_register:
1704 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1705 fputc ('\n', asm_out_file);
1707 case DW_CFA_register:
1708 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1709 fputc ('\n', asm_out_file);
1710 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1711 fputc ('\n', asm_out_file);
1713 case DW_CFA_def_cfa_offset:
1714 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1715 fputc ('\n', asm_out_file);
1717 case DW_CFA_GNU_window_save:
1719 case DW_CFA_GNU_args_size:
1720 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1721 fputc ('\n', asm_out_file);
1723 case DW_CFA_def_cfa_expression:
1724 output_cfa_loc (cfi);
1732 /* Output the call frame information used to used to record information
1733 that relates to calculating the frame pointer, and records the
1734 location of saved registers. */
1737 output_call_frame_info (for_eh)
1740 register unsigned long i;
1741 register dw_fde_ref fde;
1742 register dw_cfi_ref cfi;
1743 char l1[20], l2[20];
1744 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1748 /* Do we want to include a pointer to the exception table? */
1749 int eh_ptr = for_eh && exception_table_p ();
1751 /* If we don't have any functions we'll want to unwind out of, don't
1752 emit any EH unwind information. */
1755 for (i = 0; i < fde_table_in_use; ++i)
1756 if (! fde_table[i].nothrow)
1762 fputc ('\n', asm_out_file);
1764 /* We're going to be generating comments, so turn on app. */
1770 #ifdef EH_FRAME_SECTION
1771 EH_FRAME_SECTION ();
1773 tree label = get_file_function_name ('F');
1775 force_data_section ();
1776 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1777 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1778 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1780 assemble_label ("__FRAME_BEGIN__");
1783 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1785 /* Output the CIE. */
1786 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1787 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1788 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1789 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1791 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1793 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1796 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1798 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1801 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1804 fputc ('\n', asm_out_file);
1805 ASM_OUTPUT_LABEL (asm_out_file, l1);
1808 /* Now that the CIE pointer is PC-relative for EH,
1809 use 0 to identify the CIE. */
1810 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1812 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1815 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1817 fputc ('\n', asm_out_file);
1818 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1820 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1821 fputc ('\n', asm_out_file);
1824 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1826 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1828 fputc ('\n', asm_out_file);
1831 /* The CIE contains a pointer to the exception region info for the
1832 frame. Make the augmentation string three bytes (including the
1833 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1834 can't handle unaligned relocs. */
1837 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1838 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1842 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1844 fputc ('\n', asm_out_file);
1846 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1848 fprintf (asm_out_file, "\t%s pointer to exception region info",
1853 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1855 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1859 fputc ('\n', asm_out_file);
1862 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1864 fputc ('\n', asm_out_file);
1865 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1867 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1869 fputc ('\n', asm_out_file);
1870 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1872 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1874 fputc ('\n', asm_out_file);
1876 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1877 output_cfi (cfi, NULL);
1879 /* Pad the CIE out to an address sized boundary. */
1880 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1881 ASM_OUTPUT_LABEL (asm_out_file, l2);
1882 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1883 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1885 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1886 fputc ('\n', asm_out_file);
1889 /* Loop through all of the FDE's. */
1890 for (i = 0; i < fde_table_in_use; ++i)
1892 fde = &fde_table[i];
1894 /* Don't emit EH unwind info for leaf functions. */
1895 if (for_eh && fde->nothrow)
1898 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1899 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1900 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1901 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1903 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1905 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1908 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1910 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1913 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1914 fputc ('\n', asm_out_file);
1915 ASM_OUTPUT_LABEL (asm_out_file, l1);
1917 /* ??? This always emits a 4 byte offset when for_eh is true, but it
1918 emits a target dependent sized offset when for_eh is not true.
1919 This inconsistency may confuse gdb. The only case where we need a
1920 non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI
1921 compatibility if we emit a 4 byte offset. We need a 4 byte offset
1922 though in order to be compatible with the dwarf_fde struct in frame.c.
1923 If the for_eh case is changed, then the struct in frame.c has
1924 to be adjusted appropriately. */
1926 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l1, "__FRAME_BEGIN__");
1928 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1930 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1932 fputc ('\n', asm_out_file);
1933 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1935 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1937 fputc ('\n', asm_out_file);
1938 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1939 fde->dw_fde_end, fde->dw_fde_begin);
1941 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1943 fputc ('\n', asm_out_file);
1945 /* Loop through the Call Frame Instructions associated with
1947 fde->dw_fde_current_label = fde->dw_fde_begin;
1948 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1949 output_cfi (cfi, fde);
1951 /* Pad the FDE out to an address sized boundary. */
1952 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1953 ASM_OUTPUT_LABEL (asm_out_file, l2);
1954 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1955 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1957 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1958 fputc ('\n', asm_out_file);
1961 #ifndef EH_FRAME_SECTION
1964 /* Emit terminating zero for table. */
1965 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1966 fputc ('\n', asm_out_file);
1969 #ifdef MIPS_DEBUGGING_INFO
1970 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1971 get a value of 0. Putting .align 0 after the label fixes it. */
1972 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1975 /* Turn off app to make assembly quicker. */
1980 /* Output a marker (i.e. a label) for the beginning of a function, before
1984 dwarf2out_begin_prologue ()
1986 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1987 register dw_fde_ref fde;
1989 ++current_funcdef_number;
1991 function_section (current_function_decl);
1992 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1993 current_funcdef_number);
1994 ASM_OUTPUT_LABEL (asm_out_file, label);
1995 current_function_func_begin_label = get_identifier (label);
1997 /* Expand the fde table if necessary. */
1998 if (fde_table_in_use == fde_table_allocated)
2000 fde_table_allocated += FDE_TABLE_INCREMENT;
2002 = (dw_fde_ref) xrealloc (fde_table,
2003 fde_table_allocated * sizeof (dw_fde_node));
2006 /* Record the FDE associated with this function. */
2007 current_funcdef_fde = fde_table_in_use;
2009 /* Add the new FDE at the end of the fde_table. */
2010 fde = &fde_table[fde_table_in_use++];
2011 fde->dw_fde_begin = xstrdup (label);
2012 fde->dw_fde_current_label = NULL;
2013 fde->dw_fde_end = NULL;
2014 fde->dw_fde_cfi = NULL;
2015 fde->nothrow = current_function_nothrow;
2017 args_size = old_args_size = 0;
2020 /* Output a marker (i.e. a label) for the absolute end of the generated code
2021 for a function definition. This gets called *after* the epilogue code has
2025 dwarf2out_end_epilogue ()
2028 char label[MAX_ARTIFICIAL_LABEL_BYTES];
2030 /* Output a label to mark the endpoint of the code generated for this
2032 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
2033 ASM_OUTPUT_LABEL (asm_out_file, label);
2034 fde = &fde_table[fde_table_in_use - 1];
2035 fde->dw_fde_end = xstrdup (label);
2039 dwarf2out_frame_init ()
2041 /* Allocate the initial hunk of the fde_table. */
2042 fde_table = (dw_fde_ref) xcalloc (FDE_TABLE_INCREMENT, sizeof (dw_fde_node));
2043 fde_table_allocated = FDE_TABLE_INCREMENT;
2044 fde_table_in_use = 0;
2046 /* Generate the CFA instructions common to all FDE's. Do it now for the
2047 sake of lookup_cfa. */
2049 #ifdef DWARF2_UNWIND_INFO
2050 /* On entry, the Canonical Frame Address is at SP. */
2051 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
2052 initial_return_save (INCOMING_RETURN_ADDR_RTX);
2057 dwarf2out_frame_finish ()
2059 /* Output call frame information. */
2060 #ifdef MIPS_DEBUGGING_INFO
2061 if (write_symbols == DWARF2_DEBUG)
2062 output_call_frame_info (0);
2063 if (flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp))
2064 output_call_frame_info (1);
2066 if (write_symbols == DWARF2_DEBUG
2067 || flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp))
2068 output_call_frame_info (1);
2072 /* And now, the subset of the debugging information support code necessary
2073 for emitting location expressions. */
2075 typedef struct dw_val_struct *dw_val_ref;
2076 typedef struct die_struct *dw_die_ref;
2077 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2079 /* Each DIE may have a series of attribute/value pairs. Values
2080 can take on several forms. The forms that are used in this
2081 implementation are listed below. */
2088 dw_val_class_unsigned_const,
2089 dw_val_class_long_long,
2092 dw_val_class_die_ref,
2093 dw_val_class_fde_ref,
2094 dw_val_class_lbl_id,
2095 dw_val_class_lbl_offset,
2100 /* Describe a double word constant value. */
2101 /* ??? Every instance of long_long in the code really means CONST_DOUBLE. */
2103 typedef struct dw_long_long_struct
2110 /* Describe a floating point constant value. */
2112 typedef struct dw_fp_struct
2119 /* The dw_val_node describes an attribute's value, as it is
2120 represented internally. */
2122 typedef struct dw_val_struct
2124 dw_val_class val_class;
2128 dw_loc_descr_ref val_loc;
2130 long unsigned val_unsigned;
2131 dw_long_long_const val_long_long;
2132 dw_float_const val_float;
2133 dw_die_ref val_die_ref;
2134 unsigned val_fde_index;
2137 unsigned char val_flag;
2143 /* Locations in memory are described using a sequence of stack machine
2146 typedef struct dw_loc_descr_struct
2148 dw_loc_descr_ref dw_loc_next;
2149 enum dwarf_location_atom dw_loc_opc;
2150 dw_val_node dw_loc_oprnd1;
2151 dw_val_node dw_loc_oprnd2;
2155 static const char *dwarf_stack_op_name PARAMS ((unsigned));
2156 static dw_loc_descr_ref new_loc_descr PARAMS ((enum dwarf_location_atom,
2159 static void add_loc_descr PARAMS ((dw_loc_descr_ref *,
2161 static unsigned long size_of_loc_descr PARAMS ((dw_loc_descr_ref));
2162 static unsigned long size_of_locs PARAMS ((dw_loc_descr_ref));
2163 static void output_loc_operands PARAMS ((dw_loc_descr_ref));
2164 static void output_loc_sequence PARAMS ((dw_loc_descr_ref));
2166 /* Convert a DWARF stack opcode into its string name. */
2169 dwarf_stack_op_name (op)
2170 register unsigned op;
2175 return "DW_OP_addr";
2177 return "DW_OP_deref";
2179 return "DW_OP_const1u";
2181 return "DW_OP_const1s";
2183 return "DW_OP_const2u";
2185 return "DW_OP_const2s";
2187 return "DW_OP_const4u";
2189 return "DW_OP_const4s";
2191 return "DW_OP_const8u";
2193 return "DW_OP_const8s";
2195 return "DW_OP_constu";
2197 return "DW_OP_consts";
2201 return "DW_OP_drop";
2203 return "DW_OP_over";
2205 return "DW_OP_pick";
2207 return "DW_OP_swap";
2211 return "DW_OP_xderef";
2219 return "DW_OP_minus";
2231 return "DW_OP_plus";
2232 case DW_OP_plus_uconst:
2233 return "DW_OP_plus_uconst";
2239 return "DW_OP_shra";
2257 return "DW_OP_skip";
2259 return "DW_OP_lit0";
2261 return "DW_OP_lit1";
2263 return "DW_OP_lit2";
2265 return "DW_OP_lit3";
2267 return "DW_OP_lit4";
2269 return "DW_OP_lit5";
2271 return "DW_OP_lit6";
2273 return "DW_OP_lit7";
2275 return "DW_OP_lit8";
2277 return "DW_OP_lit9";
2279 return "DW_OP_lit10";
2281 return "DW_OP_lit11";
2283 return "DW_OP_lit12";
2285 return "DW_OP_lit13";
2287 return "DW_OP_lit14";
2289 return "DW_OP_lit15";
2291 return "DW_OP_lit16";
2293 return "DW_OP_lit17";
2295 return "DW_OP_lit18";
2297 return "DW_OP_lit19";
2299 return "DW_OP_lit20";
2301 return "DW_OP_lit21";
2303 return "DW_OP_lit22";
2305 return "DW_OP_lit23";
2307 return "DW_OP_lit24";
2309 return "DW_OP_lit25";
2311 return "DW_OP_lit26";
2313 return "DW_OP_lit27";
2315 return "DW_OP_lit28";
2317 return "DW_OP_lit29";
2319 return "DW_OP_lit30";
2321 return "DW_OP_lit31";
2323 return "DW_OP_reg0";
2325 return "DW_OP_reg1";
2327 return "DW_OP_reg2";
2329 return "DW_OP_reg3";
2331 return "DW_OP_reg4";
2333 return "DW_OP_reg5";
2335 return "DW_OP_reg6";
2337 return "DW_OP_reg7";
2339 return "DW_OP_reg8";
2341 return "DW_OP_reg9";
2343 return "DW_OP_reg10";
2345 return "DW_OP_reg11";
2347 return "DW_OP_reg12";
2349 return "DW_OP_reg13";
2351 return "DW_OP_reg14";
2353 return "DW_OP_reg15";
2355 return "DW_OP_reg16";
2357 return "DW_OP_reg17";
2359 return "DW_OP_reg18";
2361 return "DW_OP_reg19";
2363 return "DW_OP_reg20";
2365 return "DW_OP_reg21";
2367 return "DW_OP_reg22";
2369 return "DW_OP_reg23";
2371 return "DW_OP_reg24";
2373 return "DW_OP_reg25";
2375 return "DW_OP_reg26";
2377 return "DW_OP_reg27";
2379 return "DW_OP_reg28";
2381 return "DW_OP_reg29";
2383 return "DW_OP_reg30";
2385 return "DW_OP_reg31";
2387 return "DW_OP_breg0";
2389 return "DW_OP_breg1";
2391 return "DW_OP_breg2";
2393 return "DW_OP_breg3";
2395 return "DW_OP_breg4";
2397 return "DW_OP_breg5";
2399 return "DW_OP_breg6";
2401 return "DW_OP_breg7";
2403 return "DW_OP_breg8";
2405 return "DW_OP_breg9";
2407 return "DW_OP_breg10";
2409 return "DW_OP_breg11";
2411 return "DW_OP_breg12";
2413 return "DW_OP_breg13";
2415 return "DW_OP_breg14";
2417 return "DW_OP_breg15";
2419 return "DW_OP_breg16";
2421 return "DW_OP_breg17";
2423 return "DW_OP_breg18";
2425 return "DW_OP_breg19";
2427 return "DW_OP_breg20";
2429 return "DW_OP_breg21";
2431 return "DW_OP_breg22";
2433 return "DW_OP_breg23";
2435 return "DW_OP_breg24";
2437 return "DW_OP_breg25";
2439 return "DW_OP_breg26";
2441 return "DW_OP_breg27";
2443 return "DW_OP_breg28";
2445 return "DW_OP_breg29";
2447 return "DW_OP_breg30";
2449 return "DW_OP_breg31";
2451 return "DW_OP_regx";
2453 return "DW_OP_fbreg";
2455 return "DW_OP_bregx";
2457 return "DW_OP_piece";
2458 case DW_OP_deref_size:
2459 return "DW_OP_deref_size";
2460 case DW_OP_xderef_size:
2461 return "DW_OP_xderef_size";
2465 return "OP_<unknown>";
2470 /* Return a pointer to a newly allocated location description. Location
2471 descriptions are simple expression terms that can be strung
2472 together to form more complicated location (address) descriptions. */
2474 static inline dw_loc_descr_ref
2475 new_loc_descr (op, oprnd1, oprnd2)
2476 register enum dwarf_location_atom op;
2477 register unsigned long oprnd1;
2478 register unsigned long oprnd2;
2480 register dw_loc_descr_ref descr
2481 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
2483 descr->dw_loc_next = NULL;
2484 descr->dw_loc_opc = op;
2485 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
2486 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
2487 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
2488 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
2493 /* Add a location description term to a location description expression. */
2496 add_loc_descr (list_head, descr)
2497 register dw_loc_descr_ref *list_head;
2498 register dw_loc_descr_ref descr;
2500 register dw_loc_descr_ref *d;
2502 /* Find the end of the chain. */
2503 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
2509 /* Return the size of a location descriptor. */
2511 static unsigned long
2512 size_of_loc_descr (loc)
2513 register dw_loc_descr_ref loc;
2515 register unsigned long size = 1;
2517 switch (loc->dw_loc_opc)
2520 size += DWARF2_ADDR_SIZE;
2539 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2542 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2547 case DW_OP_plus_uconst:
2548 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2586 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2589 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2592 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2595 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2596 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
2599 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2601 case DW_OP_deref_size:
2602 case DW_OP_xderef_size:
2612 /* Return the size of a series of location descriptors. */
2614 static unsigned long
2616 register dw_loc_descr_ref loc;
2618 register unsigned long size = 0;
2620 for (; loc != NULL; loc = loc->dw_loc_next)
2621 size += size_of_loc_descr (loc);
2626 /* Output location description stack opcode's operands (if any). */
2629 output_loc_operands (loc)
2630 register dw_loc_descr_ref loc;
2632 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
2633 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
2635 switch (loc->dw_loc_opc)
2637 #ifdef DWARF2_DEBUGGING_INFO
2639 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
2640 fputc ('\n', asm_out_file);
2644 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
2645 fputc ('\n', asm_out_file);
2649 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
2650 fputc ('\n', asm_out_file);
2655 fputc ('\n', asm_out_file);
2659 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
2660 fputc ('\n', asm_out_file);
2672 /* We currently don't make any attempt to make sure these are
2673 aligned properly like we do for the main unwind info, so
2674 don't support emitting things larger than a byte if we're
2675 only doing unwinding. */
2680 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
2681 fputc ('\n', asm_out_file);
2684 output_uleb128 (val1->v.val_unsigned);
2685 fputc ('\n', asm_out_file);
2688 output_sleb128 (val1->v.val_int);
2689 fputc ('\n', asm_out_file);
2692 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
2693 fputc ('\n', asm_out_file);
2695 case DW_OP_plus_uconst:
2696 output_uleb128 (val1->v.val_unsigned);
2697 fputc ('\n', asm_out_file);
2731 output_sleb128 (val1->v.val_int);
2732 fputc ('\n', asm_out_file);
2735 output_uleb128 (val1->v.val_unsigned);
2736 fputc ('\n', asm_out_file);
2739 output_sleb128 (val1->v.val_int);
2740 fputc ('\n', asm_out_file);
2743 output_uleb128 (val1->v.val_unsigned);
2744 fputc ('\n', asm_out_file);
2745 output_sleb128 (val2->v.val_int);
2746 fputc ('\n', asm_out_file);
2749 output_uleb128 (val1->v.val_unsigned);
2750 fputc ('\n', asm_out_file);
2752 case DW_OP_deref_size:
2753 case DW_OP_xderef_size:
2754 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
2755 fputc ('\n', asm_out_file);
2758 /* Other codes have no operands. */
2763 /* Output a sequence of location operations. */
2766 output_loc_sequence (loc)
2767 dw_loc_descr_ref loc;
2769 for (; loc != NULL; loc = loc->dw_loc_next)
2771 /* Output the opcode. */
2772 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
2774 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
2775 dwarf_stack_op_name (loc->dw_loc_opc));
2777 fputc ('\n', asm_out_file);
2779 /* Output the operand(s) (if any). */
2780 output_loc_operands (loc);
2784 /* This routine will generate the correct assembly data for a location
2785 description based on a cfi entry with a complex address. */
2788 output_cfa_loc (cfi)
2791 dw_loc_descr_ref loc;
2794 /* Output the size of the block. */
2795 loc = cfi->dw_cfi_oprnd1.dw_cfi_loc;
2796 size = size_of_locs (loc);
2797 output_uleb128 (size);
2798 fputc ('\n', asm_out_file);
2800 /* Now output the operations themselves. */
2801 output_loc_sequence (loc);
2804 /* This function builds a dwarf location descriptor seqeunce from
2805 a dw_cfa_location. */
2807 static struct dw_loc_descr_struct *
2809 dw_cfa_location *cfa;
2811 struct dw_loc_descr_struct *head, *tmp;
2813 if (cfa->indirect == 0)
2816 if (cfa->base_offset)
2817 head = new_loc_descr (DW_OP_breg0 + cfa->reg, cfa->base_offset, 0);
2819 head = new_loc_descr (DW_OP_reg0 + cfa->reg, 0, 0);
2820 head->dw_loc_oprnd1.val_class = dw_val_class_const;
2821 tmp = new_loc_descr (DW_OP_deref, 0, 0);
2822 add_loc_descr (&head, tmp);
2823 if (cfa->offset != 0)
2825 tmp = new_loc_descr (DW_OP_plus_uconst, cfa->offset, 0);
2826 add_loc_descr (&head, tmp);
2831 /* This function fills in aa dw_cfa_location structure from a
2832 dwarf location descriptor sequence. */
2835 get_cfa_from_loc_descr (cfa, loc)
2836 dw_cfa_location *cfa;
2837 struct dw_loc_descr_struct * loc;
2839 struct dw_loc_descr_struct * ptr;
2841 cfa->base_offset = 0;
2845 for (ptr = loc; ptr != NULL; ptr = ptr->dw_loc_next)
2847 enum dwarf_location_atom op = ptr->dw_loc_opc;
2882 cfa->reg = op - DW_OP_reg0;
2885 cfa->reg = ptr->dw_loc_oprnd1.v.val_int;
2919 cfa->reg = op - DW_OP_breg0;
2920 cfa->base_offset = ptr->dw_loc_oprnd1.v.val_int;
2923 cfa->reg = ptr->dw_loc_oprnd1.v.val_int;
2924 cfa->base_offset = ptr->dw_loc_oprnd2.v.val_int;
2929 case DW_OP_plus_uconst:
2930 cfa->offset = ptr->dw_loc_oprnd1.v.val_unsigned;
2933 fatal ("DW_LOC_OP %s not implememnted yet.\n",
2934 dwarf_stack_op_name (ptr->dw_loc_opc));
2938 #endif /* .debug_frame support */
2940 /* And now, the support for symbolic debugging information. */
2941 #ifdef DWARF2_DEBUGGING_INFO
2943 /* NOTE: In the comments in this file, many references are made to
2944 "Debugging Information Entries". This term is abbreviated as `DIE'
2945 throughout the remainder of this file. */
2947 /* An internal representation of the DWARF output is built, and then
2948 walked to generate the DWARF debugging info. The walk of the internal
2949 representation is done after the entire program has been compiled.
2950 The types below are used to describe the internal representation. */
2952 /* Various DIE's use offsets relative to the beginning of the
2953 .debug_info section to refer to each other. */
2955 typedef long int dw_offset;
2957 /* Define typedefs here to avoid circular dependencies. */
2959 typedef struct dw_attr_struct *dw_attr_ref;
2960 typedef struct dw_line_info_struct *dw_line_info_ref;
2961 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2962 typedef struct pubname_struct *pubname_ref;
2963 typedef dw_die_ref *arange_ref;
2965 /* Each entry in the line_info_table maintains the file and
2966 line number associated with the label generated for that
2967 entry. The label gives the PC value associated with
2968 the line number entry. */
2970 typedef struct dw_line_info_struct
2972 unsigned long dw_file_num;
2973 unsigned long dw_line_num;
2977 /* Line information for functions in separate sections; each one gets its
2979 typedef struct dw_separate_line_info_struct
2981 unsigned long dw_file_num;
2982 unsigned long dw_line_num;
2983 unsigned long function;
2985 dw_separate_line_info_entry;
2987 /* Each DIE attribute has a field specifying the attribute kind,
2988 a link to the next attribute in the chain, and an attribute value.
2989 Attributes are typically linked below the DIE they modify. */
2991 typedef struct dw_attr_struct
2993 enum dwarf_attribute dw_attr;
2994 dw_attr_ref dw_attr_next;
2995 dw_val_node dw_attr_val;
2999 /* The Debugging Information Entry (DIE) structure */
3001 typedef struct die_struct
3003 enum dwarf_tag die_tag;
3004 dw_attr_ref die_attr;
3005 dw_die_ref die_parent;
3006 dw_die_ref die_child;
3008 dw_offset die_offset;
3009 unsigned long die_abbrev;
3013 /* The pubname structure */
3015 typedef struct pubname_struct
3022 /* The limbo die list structure. */
3023 typedef struct limbo_die_struct
3026 struct limbo_die_struct *next;
3030 /* How to start an assembler comment. */
3031 #ifndef ASM_COMMENT_START
3032 #define ASM_COMMENT_START ";#"
3035 /* Define a macro which returns non-zero for a TYPE_DECL which was
3036 implicitly generated for a tagged type.
3038 Note that unlike the gcc front end (which generates a NULL named
3039 TYPE_DECL node for each complete tagged type, each array type, and
3040 each function type node created) the g++ front end generates a
3041 _named_ TYPE_DECL node for each tagged type node created.
3042 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
3043 generate a DW_TAG_typedef DIE for them. */
3045 #define TYPE_DECL_IS_STUB(decl) \
3046 (DECL_NAME (decl) == NULL_TREE \
3047 || (DECL_ARTIFICIAL (decl) \
3048 && is_tagged_type (TREE_TYPE (decl)) \
3049 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
3050 /* This is necessary for stub decls that \
3051 appear in nested inline functions. */ \
3052 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
3053 && (decl_ultimate_origin (decl) \
3054 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
3056 /* Information concerning the compilation unit's programming
3057 language, and compiler version. */
3059 extern int flag_traditional;
3061 /* Fixed size portion of the DWARF compilation unit header. */
3062 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
3064 /* Fixed size portion of debugging line information prolog. */
3065 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
3067 /* Fixed size portion of public names info. */
3068 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
3070 /* Fixed size portion of the address range info. */
3071 #define DWARF_ARANGES_HEADER_SIZE \
3072 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \
3073 - DWARF_OFFSET_SIZE)
3075 /* Size of padding portion in the address range info. It must be
3076 aligned to twice the pointer size. */
3077 #define DWARF_ARANGES_PAD_SIZE \
3078 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \
3079 - (2 * DWARF_OFFSET_SIZE + 4))
3081 /* The default is to have gcc emit the line number tables. */
3082 #ifndef DWARF2_ASM_LINE_DEBUG_INFO
3083 #define DWARF2_ASM_LINE_DEBUG_INFO 0
3086 /* Define the architecture-dependent minimum instruction length (in bytes).
3087 In this implementation of DWARF, this field is used for information
3088 purposes only. Since GCC generates assembly language, we have
3089 no a priori knowledge of how many instruction bytes are generated
3090 for each source line, and therefore can use only the DW_LNE_set_address
3091 and DW_LNS_fixed_advance_pc line information commands. */
3093 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
3094 #define DWARF_LINE_MIN_INSTR_LENGTH 4
3097 /* Minimum line offset in a special line info. opcode.
3098 This value was chosen to give a reasonable range of values. */
3099 #define DWARF_LINE_BASE -10
3101 /* First special line opcde - leave room for the standard opcodes. */
3102 #define DWARF_LINE_OPCODE_BASE 10
3104 /* Range of line offsets in a special line info. opcode. */
3105 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
3107 /* Flag that indicates the initial value of the is_stmt_start flag.
3108 In the present implementation, we do not mark any lines as
3109 the beginning of a source statement, because that information
3110 is not made available by the GCC front-end. */
3111 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
3113 /* This location is used by calc_die_sizes() to keep track
3114 the offset of each DIE within the .debug_info section. */
3115 static unsigned long next_die_offset;
3117 /* Record the root of the DIE's built for the current compilation unit. */
3118 static dw_die_ref comp_unit_die;
3120 /* A list of DIEs with a NULL parent waiting to be relocated. */
3121 static limbo_die_node *limbo_die_list = 0;
3123 /* Pointer to an array of filenames referenced by this compilation unit. */
3124 static char **file_table;
3126 /* Total number of entries in the table (i.e. array) pointed to by
3127 `file_table'. This is the *total* and includes both used and unused
3129 static unsigned file_table_allocated;
3131 /* Number of entries in the file_table which are actually in use. */
3132 static unsigned file_table_in_use;
3134 /* Size (in elements) of increments by which we may expand the filename
3136 #define FILE_TABLE_INCREMENT 64
3138 /* Local pointer to the name of the main input file. Initialized in
3140 static const char *primary_filename;
3142 /* A pointer to the base of a table of references to DIE's that describe
3143 declarations. The table is indexed by DECL_UID() which is a unique
3144 number identifying each decl. */
3145 static dw_die_ref *decl_die_table;
3147 /* Number of elements currently allocated for the decl_die_table. */
3148 static unsigned decl_die_table_allocated;
3150 /* Number of elements in decl_die_table currently in use. */
3151 static unsigned decl_die_table_in_use;
3153 /* Size (in elements) of increments by which we may expand the
3155 #define DECL_DIE_TABLE_INCREMENT 256
3157 /* A pointer to the base of a table of references to declaration
3158 scopes. This table is a display which tracks the nesting
3159 of declaration scopes at the current scope and containing
3160 scopes. This table is used to find the proper place to
3161 define type declaration DIE's. */
3162 static tree *decl_scope_table;
3164 /* Number of elements currently allocated for the decl_scope_table. */
3165 static int decl_scope_table_allocated;
3167 /* Current level of nesting of declaration scopes. */
3168 static int decl_scope_depth;
3170 /* Size (in elements) of increments by which we may expand the
3171 decl_scope_table. */
3172 #define DECL_SCOPE_TABLE_INCREMENT 64
3174 /* A pointer to the base of a list of references to DIE's that
3175 are uniquely identified by their tag, presence/absence of
3176 children DIE's, and list of attribute/value pairs. */
3177 static dw_die_ref *abbrev_die_table;
3179 /* Number of elements currently allocated for abbrev_die_table. */
3180 static unsigned abbrev_die_table_allocated;
3182 /* Number of elements in type_die_table currently in use. */
3183 static unsigned abbrev_die_table_in_use;
3185 /* Size (in elements) of increments by which we may expand the
3186 abbrev_die_table. */
3187 #define ABBREV_DIE_TABLE_INCREMENT 256
3189 /* A pointer to the base of a table that contains line information
3190 for each source code line in .text in the compilation unit. */
3191 static dw_line_info_ref line_info_table;
3193 /* Number of elements currently allocated for line_info_table. */
3194 static unsigned line_info_table_allocated;
3196 /* Number of elements in separate_line_info_table currently in use. */
3197 static unsigned separate_line_info_table_in_use;
3199 /* A pointer to the base of a table that contains line information
3200 for each source code line outside of .text in the compilation unit. */
3201 static dw_separate_line_info_ref separate_line_info_table;
3203 /* Number of elements currently allocated for separate_line_info_table. */
3204 static unsigned separate_line_info_table_allocated;
3206 /* Number of elements in line_info_table currently in use. */
3207 static unsigned line_info_table_in_use;
3209 /* Size (in elements) of increments by which we may expand the
3211 #define LINE_INFO_TABLE_INCREMENT 1024
3213 /* A pointer to the base of a table that contains a list of publicly
3214 accessible names. */
3215 static pubname_ref pubname_table;
3217 /* Number of elements currently allocated for pubname_table. */
3218 static unsigned pubname_table_allocated;
3220 /* Number of elements in pubname_table currently in use. */
3221 static unsigned pubname_table_in_use;
3223 /* Size (in elements) of increments by which we may expand the
3225 #define PUBNAME_TABLE_INCREMENT 64
3227 /* A pointer to the base of a table that contains a list of publicly
3228 accessible names. */
3229 static arange_ref arange_table;
3231 /* Number of elements currently allocated for arange_table. */
3232 static unsigned arange_table_allocated;
3234 /* Number of elements in arange_table currently in use. */
3235 static unsigned arange_table_in_use;
3237 /* Size (in elements) of increments by which we may expand the
3239 #define ARANGE_TABLE_INCREMENT 64
3241 /* A pointer to the base of a list of incomplete types which might be
3242 completed at some later time. */
3244 static tree *incomplete_types_list;
3246 /* Number of elements currently allocated for the incomplete_types_list. */
3247 static unsigned incomplete_types_allocated;
3249 /* Number of elements of incomplete_types_list currently in use. */
3250 static unsigned incomplete_types;
3252 /* Size (in elements) of increments by which we may expand the incomplete
3253 types list. Actually, a single hunk of space of this size should
3254 be enough for most typical programs. */
3255 #define INCOMPLETE_TYPES_INCREMENT 64
3257 /* Record whether the function being analyzed contains inlined functions. */
3258 static int current_function_has_inlines;
3259 #if 0 && defined (MIPS_DEBUGGING_INFO)
3260 static int comp_unit_has_inlines;
3263 /* Array of RTXes referenced by the debugging information, which therefore
3264 must be kept around forever. We do this rather than perform GC on
3265 the dwarf info because almost all of the dwarf info lives forever, and
3266 it's easier to support non-GC frontends this way. */
3267 static varray_type used_rtx_varray;
3269 /* Forward declarations for functions defined in this file. */
3271 static int is_pseudo_reg PARAMS ((rtx));
3272 static tree type_main_variant PARAMS ((tree));
3273 static int is_tagged_type PARAMS ((tree));
3274 static const char *dwarf_tag_name PARAMS ((unsigned));
3275 static const char *dwarf_attr_name PARAMS ((unsigned));
3276 static const char *dwarf_form_name PARAMS ((unsigned));
3278 static const char *dwarf_type_encoding_name PARAMS ((unsigned));
3280 static tree decl_ultimate_origin PARAMS ((tree));
3281 static tree block_ultimate_origin PARAMS ((tree));
3282 static tree decl_class_context PARAMS ((tree));
3283 static void add_dwarf_attr PARAMS ((dw_die_ref, dw_attr_ref));
3284 static void add_AT_flag PARAMS ((dw_die_ref,
3285 enum dwarf_attribute,
3287 static void add_AT_int PARAMS ((dw_die_ref,
3288 enum dwarf_attribute, long));
3289 static void add_AT_unsigned PARAMS ((dw_die_ref,
3290 enum dwarf_attribute,
3292 static void add_AT_long_long PARAMS ((dw_die_ref,
3293 enum dwarf_attribute,
3296 static void add_AT_float PARAMS ((dw_die_ref,
3297 enum dwarf_attribute,
3299 static void add_AT_string PARAMS ((dw_die_ref,
3300 enum dwarf_attribute,
3302 static void add_AT_die_ref PARAMS ((dw_die_ref,
3303 enum dwarf_attribute,
3305 static void add_AT_fde_ref PARAMS ((dw_die_ref,
3306 enum dwarf_attribute,
3308 static void add_AT_loc PARAMS ((dw_die_ref,
3309 enum dwarf_attribute,
3311 static void add_AT_addr PARAMS ((dw_die_ref,
3312 enum dwarf_attribute,
3314 static void add_AT_lbl_id PARAMS ((dw_die_ref,
3315 enum dwarf_attribute,
3317 static void add_AT_lbl_offset PARAMS ((dw_die_ref,
3318 enum dwarf_attribute,
3320 static dw_attr_ref get_AT PARAMS ((dw_die_ref,
3321 enum dwarf_attribute));
3322 static const char *get_AT_low_pc PARAMS ((dw_die_ref));
3323 static const char *get_AT_hi_pc PARAMS ((dw_die_ref));
3324 static const char *get_AT_string PARAMS ((dw_die_ref,
3325 enum dwarf_attribute));
3326 static int get_AT_flag PARAMS ((dw_die_ref,
3327 enum dwarf_attribute));
3328 static unsigned get_AT_unsigned PARAMS ((dw_die_ref,
3329 enum dwarf_attribute));
3330 static inline dw_die_ref get_AT_ref PARAMS ((dw_die_ref,
3331 enum dwarf_attribute));
3332 static int is_c_family PARAMS ((void));
3333 static int is_fortran PARAMS ((void));
3334 static void remove_AT PARAMS ((dw_die_ref,
3335 enum dwarf_attribute));
3336 static void remove_children PARAMS ((dw_die_ref));
3337 static void add_child_die PARAMS ((dw_die_ref, dw_die_ref));
3338 static dw_die_ref new_die PARAMS ((enum dwarf_tag, dw_die_ref));
3339 static dw_die_ref lookup_type_die PARAMS ((tree));
3340 static void equate_type_number_to_die PARAMS ((tree, dw_die_ref));
3341 static dw_die_ref lookup_decl_die PARAMS ((tree));
3342 static void equate_decl_number_to_die PARAMS ((tree, dw_die_ref));
3343 static void print_spaces PARAMS ((FILE *));
3344 static void print_die PARAMS ((dw_die_ref, FILE *));
3345 static void print_dwarf_line_table PARAMS ((FILE *));
3346 static void add_sibling_attributes PARAMS ((dw_die_ref));
3347 static void build_abbrev_table PARAMS ((dw_die_ref));
3348 static unsigned long size_of_string PARAMS ((const char *));
3349 static int constant_size PARAMS ((long unsigned));
3350 static unsigned long size_of_die PARAMS ((dw_die_ref));
3351 static void calc_die_sizes PARAMS ((dw_die_ref));
3352 static unsigned long size_of_line_prolog PARAMS ((void));
3353 static unsigned long size_of_pubnames PARAMS ((void));
3354 static unsigned long size_of_aranges PARAMS ((void));
3355 static enum dwarf_form value_format PARAMS ((dw_attr_ref));
3356 static void output_value_format PARAMS ((dw_attr_ref));
3357 static void output_abbrev_section PARAMS ((void));
3358 static void output_die PARAMS ((dw_die_ref));
3359 static void output_compilation_unit_header PARAMS ((void));
3360 static const char *dwarf2_name PARAMS ((tree, int));
3361 static void add_pubname PARAMS ((tree, dw_die_ref));
3362 static void output_pubnames PARAMS ((void));
3363 static void add_arange PARAMS ((tree, dw_die_ref));
3364 static void output_aranges PARAMS ((void));
3365 static void output_line_info PARAMS ((void));
3366 static dw_die_ref base_type_die PARAMS ((tree));
3367 static tree root_type PARAMS ((tree));
3368 static int is_base_type PARAMS ((tree));
3369 static dw_die_ref modified_type_die PARAMS ((tree, int, int, dw_die_ref));
3370 static int type_is_enum PARAMS ((tree));
3371 static unsigned int reg_number PARAMS ((rtx));
3372 static dw_loc_descr_ref reg_loc_descriptor PARAMS ((rtx));
3373 static dw_loc_descr_ref based_loc_descr PARAMS ((unsigned, long));
3374 static int is_based_loc PARAMS ((rtx));
3375 static dw_loc_descr_ref mem_loc_descriptor PARAMS ((rtx, enum machine_mode mode));
3376 static dw_loc_descr_ref concat_loc_descriptor PARAMS ((rtx, rtx));
3377 static dw_loc_descr_ref loc_descriptor PARAMS ((rtx));
3378 static HOST_WIDE_INT ceiling PARAMS ((HOST_WIDE_INT, unsigned int));
3379 static tree field_type PARAMS ((tree));
3380 static unsigned int simple_type_align_in_bits PARAMS ((tree));
3381 static unsigned HOST_WIDE_INT simple_type_size_in_bits PARAMS ((tree));
3382 static HOST_WIDE_INT field_byte_offset PARAMS ((tree));
3383 static void add_AT_location_description PARAMS ((dw_die_ref,
3384 enum dwarf_attribute, rtx));
3385 static void add_data_member_location_attribute PARAMS ((dw_die_ref, tree));
3386 static void add_const_value_attribute PARAMS ((dw_die_ref, rtx));
3387 static void add_location_or_const_value_attribute PARAMS ((dw_die_ref, tree));
3388 static void add_name_attribute PARAMS ((dw_die_ref, const char *));
3389 static void add_bound_info PARAMS ((dw_die_ref,
3390 enum dwarf_attribute, tree));
3391 static void add_subscript_info PARAMS ((dw_die_ref, tree));
3392 static void add_byte_size_attribute PARAMS ((dw_die_ref, tree));
3393 static void add_bit_offset_attribute PARAMS ((dw_die_ref, tree));
3394 static void add_bit_size_attribute PARAMS ((dw_die_ref, tree));
3395 static void add_prototyped_attribute PARAMS ((dw_die_ref, tree));
3396 static void add_abstract_origin_attribute PARAMS ((dw_die_ref, tree));
3397 static void add_pure_or_virtual_attribute PARAMS ((dw_die_ref, tree));
3398 static void add_src_coords_attributes PARAMS ((dw_die_ref, tree));
3399 static void add_name_and_src_coords_attributes PARAMS ((dw_die_ref, tree));
3400 static void push_decl_scope PARAMS ((tree));
3401 static dw_die_ref scope_die_for PARAMS ((tree, dw_die_ref));
3402 static void pop_decl_scope PARAMS ((void));
3403 static void add_type_attribute PARAMS ((dw_die_ref, tree, int, int,
3405 static const char *type_tag PARAMS ((tree));
3406 static tree member_declared_type PARAMS ((tree));
3408 static const char *decl_start_label PARAMS ((tree));
3410 static void gen_array_type_die PARAMS ((tree, dw_die_ref));
3411 static void gen_set_type_die PARAMS ((tree, dw_die_ref));
3413 static void gen_entry_point_die PARAMS ((tree, dw_die_ref));
3415 static void gen_inlined_enumeration_type_die PARAMS ((tree, dw_die_ref));
3416 static void gen_inlined_structure_type_die PARAMS ((tree, dw_die_ref));
3417 static void gen_inlined_union_type_die PARAMS ((tree, dw_die_ref));
3418 static void gen_enumeration_type_die PARAMS ((tree, dw_die_ref));
3419 static dw_die_ref gen_formal_parameter_die PARAMS ((tree, dw_die_ref));
3420 static void gen_unspecified_parameters_die PARAMS ((tree, dw_die_ref));
3421 static void gen_formal_types_die PARAMS ((tree, dw_die_ref));
3422 static void gen_subprogram_die PARAMS ((tree, dw_die_ref));
3423 static void gen_variable_die PARAMS ((tree, dw_die_ref));
3424 static void gen_label_die PARAMS ((tree, dw_die_ref));
3425 static void gen_lexical_block_die PARAMS ((tree, dw_die_ref, int));
3426 static void gen_inlined_subroutine_die PARAMS ((tree, dw_die_ref, int));
3427 static void gen_field_die PARAMS ((tree, dw_die_ref));
3428 static void gen_ptr_to_mbr_type_die PARAMS ((tree, dw_die_ref));
3429 static dw_die_ref gen_compile_unit_die PARAMS ((const char *));
3430 static void gen_string_type_die PARAMS ((tree, dw_die_ref));
3431 static void gen_inheritance_die PARAMS ((tree, dw_die_ref));
3432 static void gen_member_die PARAMS ((tree, dw_die_ref));
3433 static void gen_struct_or_union_type_die PARAMS ((tree, dw_die_ref));
3434 static void gen_subroutine_type_die PARAMS ((tree, dw_die_ref));
3435 static void gen_typedef_die PARAMS ((tree, dw_die_ref));
3436 static void gen_type_die PARAMS ((tree, dw_die_ref));
3437 static void gen_tagged_type_instantiation_die PARAMS ((tree, dw_die_ref));
3438 static void gen_block_die PARAMS ((tree, dw_die_ref, int));
3439 static void decls_for_scope PARAMS ((tree, dw_die_ref, int));
3440 static int is_redundant_typedef PARAMS ((tree));
3441 static void gen_decl_die PARAMS ((tree, dw_die_ref));
3442 static unsigned lookup_filename PARAMS ((const char *));
3443 static void add_incomplete_type PARAMS ((tree));
3444 static void retry_incomplete_types PARAMS ((void));
3445 static void gen_type_die_for_member PARAMS ((tree, tree, dw_die_ref));
3446 static void gen_abstract_function PARAMS ((tree));
3447 static rtx save_rtx PARAMS ((rtx));
3448 static void splice_child_die PARAMS ((dw_die_ref, dw_die_ref));
3449 static void reverse_die_lists PARAMS ((dw_die_ref));
3451 /* Section names used to hold DWARF debugging information. */
3452 #ifndef DEBUG_INFO_SECTION
3453 #define DEBUG_INFO_SECTION ".debug_info"
3455 #ifndef ABBREV_SECTION
3456 #define ABBREV_SECTION ".debug_abbrev"
3458 #ifndef ARANGES_SECTION
3459 #define ARANGES_SECTION ".debug_aranges"
3461 #ifndef DW_MACINFO_SECTION
3462 #define DW_MACINFO_SECTION ".debug_macinfo"
3464 #ifndef DEBUG_LINE_SECTION
3465 #define DEBUG_LINE_SECTION ".debug_line"
3468 #define LOC_SECTION ".debug_loc"
3470 #ifndef PUBNAMES_SECTION
3471 #define PUBNAMES_SECTION ".debug_pubnames"
3474 #define STR_SECTION ".debug_str"
3477 /* Standard ELF section names for compiled code and data. */
3478 #ifndef TEXT_SECTION
3479 #define TEXT_SECTION ".text"
3481 #ifndef DATA_SECTION
3482 #define DATA_SECTION ".data"
3485 #define BSS_SECTION ".bss"
3488 /* Labels we insert at beginning sections we can reference instead of
3489 the section names themselves. */
3491 #ifndef TEXT_SECTION_LABEL
3492 #define TEXT_SECTION_LABEL "Ltext"
3494 #ifndef DEBUG_LINE_SECTION_LABEL
3495 #define DEBUG_LINE_SECTION_LABEL "Ldebug_line"
3497 #ifndef DEBUG_INFO_SECTION_LABEL
3498 #define DEBUG_INFO_SECTION_LABEL "Ldebug_info"
3500 #ifndef ABBREV_SECTION_LABEL
3501 #define ABBREV_SECTION_LABEL "Ldebug_abbrev"
3505 /* Definitions of defaults for formats and names of various special
3506 (artificial) labels which may be generated within this file (when the -g
3507 options is used and DWARF_DEBUGGING_INFO is in effect.
3508 If necessary, these may be overridden from within the tm.h file, but
3509 typically, overriding these defaults is unnecessary. */
3511 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3512 static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3513 static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3514 static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3515 static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3517 #ifndef TEXT_END_LABEL
3518 #define TEXT_END_LABEL "Letext"
3520 #ifndef DATA_END_LABEL
3521 #define DATA_END_LABEL "Ledata"
3523 #ifndef BSS_END_LABEL
3524 #define BSS_END_LABEL "Lebss"
3526 #ifndef INSN_LABEL_FMT
3527 #define INSN_LABEL_FMT "LI%u_"
3529 #ifndef BLOCK_BEGIN_LABEL
3530 #define BLOCK_BEGIN_LABEL "LBB"
3532 #ifndef BLOCK_END_LABEL
3533 #define BLOCK_END_LABEL "LBE"
3535 #ifndef BODY_BEGIN_LABEL
3536 #define BODY_BEGIN_LABEL "Lbb"
3538 #ifndef BODY_END_LABEL
3539 #define BODY_END_LABEL "Lbe"
3541 #ifndef LINE_CODE_LABEL
3542 #define LINE_CODE_LABEL "LM"
3544 #ifndef SEPARATE_LINE_CODE_LABEL
3545 #define SEPARATE_LINE_CODE_LABEL "LSM"
3548 /* We allow a language front-end to designate a function that is to be
3549 called to "demangle" any name before it it put into a DIE. */
3551 static const char *(*demangle_name_func) PARAMS ((const char *));
3554 dwarf2out_set_demangle_name_func (func)
3555 const char *(*func) PARAMS ((const char *));
3557 demangle_name_func = func;
3560 /* Return an rtx like ORIG which lives forever. If we're doing GC,
3561 that means adding it to used_rtx_varray. If not, that means making
3562 a copy on the permanent_obstack. */
3569 VARRAY_PUSH_RTX (used_rtx_varray, orig);
3572 push_obstacks_nochange ();
3573 end_temporary_allocation ();
3574 orig = copy_rtx (orig);
3581 /* Test if rtl node points to a pseudo register. */
3587 return ((GET_CODE (rtl) == REG && REGNO (rtl) >= FIRST_PSEUDO_REGISTER)
3588 || (GET_CODE (rtl) == SUBREG
3589 && REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER));
3592 /* Return a reference to a type, with its const and volatile qualifiers
3596 type_main_variant (type)
3599 type = TYPE_MAIN_VARIANT (type);
3601 /* There really should be only one main variant among any group of variants
3602 of a given type (and all of the MAIN_VARIANT values for all members of
3603 the group should point to that one type) but sometimes the C front-end
3604 messes this up for array types, so we work around that bug here. */
3606 if (TREE_CODE (type) == ARRAY_TYPE)
3607 while (type != TYPE_MAIN_VARIANT (type))
3608 type = TYPE_MAIN_VARIANT (type);
3613 /* Return non-zero if the given type node represents a tagged type. */
3616 is_tagged_type (type)
3619 register enum tree_code code = TREE_CODE (type);
3621 return (code == RECORD_TYPE || code == UNION_TYPE
3622 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
3625 /* Convert a DIE tag into its string name. */
3628 dwarf_tag_name (tag)
3629 register unsigned tag;
3633 case DW_TAG_padding:
3634 return "DW_TAG_padding";
3635 case DW_TAG_array_type:
3636 return "DW_TAG_array_type";
3637 case DW_TAG_class_type:
3638 return "DW_TAG_class_type";
3639 case DW_TAG_entry_point:
3640 return "DW_TAG_entry_point";
3641 case DW_TAG_enumeration_type:
3642 return "DW_TAG_enumeration_type";
3643 case DW_TAG_formal_parameter:
3644 return "DW_TAG_formal_parameter";
3645 case DW_TAG_imported_declaration:
3646 return "DW_TAG_imported_declaration";
3648 return "DW_TAG_label";
3649 case DW_TAG_lexical_block:
3650 return "DW_TAG_lexical_block";
3652 return "DW_TAG_member";
3653 case DW_TAG_pointer_type:
3654 return "DW_TAG_pointer_type";
3655 case DW_TAG_reference_type:
3656 return "DW_TAG_reference_type";
3657 case DW_TAG_compile_unit:
3658 return "DW_TAG_compile_unit";
3659 case DW_TAG_string_type:
3660 return "DW_TAG_string_type";
3661 case DW_TAG_structure_type:
3662 return "DW_TAG_structure_type";
3663 case DW_TAG_subroutine_type:
3664 return "DW_TAG_subroutine_type";
3665 case DW_TAG_typedef:
3666 return "DW_TAG_typedef";
3667 case DW_TAG_union_type:
3668 return "DW_TAG_union_type";
3669 case DW_TAG_unspecified_parameters:
3670 return "DW_TAG_unspecified_parameters";
3671 case DW_TAG_variant:
3672 return "DW_TAG_variant";
3673 case DW_TAG_common_block:
3674 return "DW_TAG_common_block";
3675 case DW_TAG_common_inclusion:
3676 return "DW_TAG_common_inclusion";
3677 case DW_TAG_inheritance:
3678 return "DW_TAG_inheritance";
3679 case DW_TAG_inlined_subroutine:
3680 return "DW_TAG_inlined_subroutine";
3682 return "DW_TAG_module";
3683 case DW_TAG_ptr_to_member_type:
3684 return "DW_TAG_ptr_to_member_type";
3685 case DW_TAG_set_type:
3686 return "DW_TAG_set_type";
3687 case DW_TAG_subrange_type:
3688 return "DW_TAG_subrange_type";
3689 case DW_TAG_with_stmt:
3690 return "DW_TAG_with_stmt";
3691 case DW_TAG_access_declaration:
3692 return "DW_TAG_access_declaration";
3693 case DW_TAG_base_type:
3694 return "DW_TAG_base_type";
3695 case DW_TAG_catch_block:
3696 return "DW_TAG_catch_block";
3697 case DW_TAG_const_type:
3698 return "DW_TAG_const_type";
3699 case DW_TAG_constant:
3700 return "DW_TAG_constant";
3701 case DW_TAG_enumerator:
3702 return "DW_TAG_enumerator";
3703 case DW_TAG_file_type:
3704 return "DW_TAG_file_type";
3706 return "DW_TAG_friend";
3707 case DW_TAG_namelist:
3708 return "DW_TAG_namelist";
3709 case DW_TAG_namelist_item:
3710 return "DW_TAG_namelist_item";
3711 case DW_TAG_packed_type:
3712 return "DW_TAG_packed_type";
3713 case DW_TAG_subprogram:
3714 return "DW_TAG_subprogram";
3715 case DW_TAG_template_type_param:
3716 return "DW_TAG_template_type_param";
3717 case DW_TAG_template_value_param:
3718 return "DW_TAG_template_value_param";
3719 case DW_TAG_thrown_type:
3720 return "DW_TAG_thrown_type";
3721 case DW_TAG_try_block:
3722 return "DW_TAG_try_block";
3723 case DW_TAG_variant_part:
3724 return "DW_TAG_variant_part";
3725 case DW_TAG_variable:
3726 return "DW_TAG_variable";
3727 case DW_TAG_volatile_type:
3728 return "DW_TAG_volatile_type";
3729 case DW_TAG_MIPS_loop:
3730 return "DW_TAG_MIPS_loop";
3731 case DW_TAG_format_label:
3732 return "DW_TAG_format_label";
3733 case DW_TAG_function_template:
3734 return "DW_TAG_function_template";
3735 case DW_TAG_class_template:
3736 return "DW_TAG_class_template";
3738 return "DW_TAG_<unknown>";
3742 /* Convert a DWARF attribute code into its string name. */
3745 dwarf_attr_name (attr)
3746 register unsigned attr;
3751 return "DW_AT_sibling";
3752 case DW_AT_location:
3753 return "DW_AT_location";
3755 return "DW_AT_name";
3756 case DW_AT_ordering:
3757 return "DW_AT_ordering";
3758 case DW_AT_subscr_data:
3759 return "DW_AT_subscr_data";
3760 case DW_AT_byte_size:
3761 return "DW_AT_byte_size";
3762 case DW_AT_bit_offset:
3763 return "DW_AT_bit_offset";
3764 case DW_AT_bit_size:
3765 return "DW_AT_bit_size";
3766 case DW_AT_element_list:
3767 return "DW_AT_element_list";
3768 case DW_AT_stmt_list:
3769 return "DW_AT_stmt_list";
3771 return "DW_AT_low_pc";
3773 return "DW_AT_high_pc";
3774 case DW_AT_language:
3775 return "DW_AT_language";
3777 return "DW_AT_member";
3779 return "DW_AT_discr";
3780 case DW_AT_discr_value:
3781 return "DW_AT_discr_value";
3782 case DW_AT_visibility:
3783 return "DW_AT_visibility";
3785 return "DW_AT_import";
3786 case DW_AT_string_length:
3787 return "DW_AT_string_length";
3788 case DW_AT_common_reference:
3789 return "DW_AT_common_reference";
3790 case DW_AT_comp_dir:
3791 return "DW_AT_comp_dir";
3792 case DW_AT_const_value:
3793 return "DW_AT_const_value";
3794 case DW_AT_containing_type:
3795 return "DW_AT_containing_type";
3796 case DW_AT_default_value:
3797 return "DW_AT_default_value";
3799 return "DW_AT_inline";
3800 case DW_AT_is_optional:
3801 return "DW_AT_is_optional";
3802 case DW_AT_lower_bound:
3803 return "DW_AT_lower_bound";
3804 case DW_AT_producer:
3805 return "DW_AT_producer";
3806 case DW_AT_prototyped:
3807 return "DW_AT_prototyped";
3808 case DW_AT_return_addr:
3809 return "DW_AT_return_addr";
3810 case DW_AT_start_scope:
3811 return "DW_AT_start_scope";
3812 case DW_AT_stride_size:
3813 return "DW_AT_stride_size";
3814 case DW_AT_upper_bound:
3815 return "DW_AT_upper_bound";
3816 case DW_AT_abstract_origin:
3817 return "DW_AT_abstract_origin";
3818 case DW_AT_accessibility:
3819 return "DW_AT_accessibility";
3820 case DW_AT_address_class:
3821 return "DW_AT_address_class";
3822 case DW_AT_artificial:
3823 return "DW_AT_artificial";
3824 case DW_AT_base_types:
3825 return "DW_AT_base_types";
3826 case DW_AT_calling_convention:
3827 return "DW_AT_calling_convention";
3829 return "DW_AT_count";
3830 case DW_AT_data_member_location:
3831 return "DW_AT_data_member_location";
3832 case DW_AT_decl_column:
3833 return "DW_AT_decl_column";
3834 case DW_AT_decl_file:
3835 return "DW_AT_decl_file";
3836 case DW_AT_decl_line:
3837 return "DW_AT_decl_line";
3838 case DW_AT_declaration:
3839 return "DW_AT_declaration";
3840 case DW_AT_discr_list:
3841 return "DW_AT_discr_list";
3842 case DW_AT_encoding:
3843 return "DW_AT_encoding";
3844 case DW_AT_external:
3845 return "DW_AT_external";
3846 case DW_AT_frame_base:
3847 return "DW_AT_frame_base";
3849 return "DW_AT_friend";
3850 case DW_AT_identifier_case:
3851 return "DW_AT_identifier_case";
3852 case DW_AT_macro_info:
3853 return "DW_AT_macro_info";
3854 case DW_AT_namelist_items:
3855 return "DW_AT_namelist_items";
3856 case DW_AT_priority:
3857 return "DW_AT_priority";
3859 return "DW_AT_segment";
3860 case DW_AT_specification:
3861 return "DW_AT_specification";
3862 case DW_AT_static_link:
3863 return "DW_AT_static_link";
3865 return "DW_AT_type";
3866 case DW_AT_use_location:
3867 return "DW_AT_use_location";
3868 case DW_AT_variable_parameter:
3869 return "DW_AT_variable_parameter";
3870 case DW_AT_virtuality:
3871 return "DW_AT_virtuality";
3872 case DW_AT_vtable_elem_location:
3873 return "DW_AT_vtable_elem_location";
3875 case DW_AT_MIPS_fde:
3876 return "DW_AT_MIPS_fde";
3877 case DW_AT_MIPS_loop_begin:
3878 return "DW_AT_MIPS_loop_begin";
3879 case DW_AT_MIPS_tail_loop_begin:
3880 return "DW_AT_MIPS_tail_loop_begin";
3881 case DW_AT_MIPS_epilog_begin:
3882 return "DW_AT_MIPS_epilog_begin";
3883 case DW_AT_MIPS_loop_unroll_factor:
3884 return "DW_AT_MIPS_loop_unroll_factor";
3885 case DW_AT_MIPS_software_pipeline_depth:
3886 return "DW_AT_MIPS_software_pipeline_depth";
3887 case DW_AT_MIPS_linkage_name:
3888 return "DW_AT_MIPS_linkage_name";
3889 case DW_AT_MIPS_stride:
3890 return "DW_AT_MIPS_stride";
3891 case DW_AT_MIPS_abstract_name:
3892 return "DW_AT_MIPS_abstract_name";
3893 case DW_AT_MIPS_clone_origin:
3894 return "DW_AT_MIPS_clone_origin";
3895 case DW_AT_MIPS_has_inlines:
3896 return "DW_AT_MIPS_has_inlines";
3898 case DW_AT_sf_names:
3899 return "DW_AT_sf_names";
3900 case DW_AT_src_info:
3901 return "DW_AT_src_info";
3902 case DW_AT_mac_info:
3903 return "DW_AT_mac_info";
3904 case DW_AT_src_coords:
3905 return "DW_AT_src_coords";
3906 case DW_AT_body_begin:
3907 return "DW_AT_body_begin";
3908 case DW_AT_body_end:
3909 return "DW_AT_body_end";
3911 return "DW_AT_<unknown>";
3915 /* Convert a DWARF value form code into its string name. */
3918 dwarf_form_name (form)
3919 register unsigned form;
3924 return "DW_FORM_addr";
3925 case DW_FORM_block2:
3926 return "DW_FORM_block2";
3927 case DW_FORM_block4:
3928 return "DW_FORM_block4";
3930 return "DW_FORM_data2";
3932 return "DW_FORM_data4";
3934 return "DW_FORM_data8";
3935 case DW_FORM_string:
3936 return "DW_FORM_string";
3938 return "DW_FORM_block";
3939 case DW_FORM_block1:
3940 return "DW_FORM_block1";
3942 return "DW_FORM_data1";
3944 return "DW_FORM_flag";
3946 return "DW_FORM_sdata";
3948 return "DW_FORM_strp";
3950 return "DW_FORM_udata";
3951 case DW_FORM_ref_addr:
3952 return "DW_FORM_ref_addr";
3954 return "DW_FORM_ref1";
3956 return "DW_FORM_ref2";
3958 return "DW_FORM_ref4";
3960 return "DW_FORM_ref8";
3961 case DW_FORM_ref_udata:
3962 return "DW_FORM_ref_udata";
3963 case DW_FORM_indirect:
3964 return "DW_FORM_indirect";
3966 return "DW_FORM_<unknown>";
3970 /* Convert a DWARF type code into its string name. */
3974 dwarf_type_encoding_name (enc)
3975 register unsigned enc;
3979 case DW_ATE_address:
3980 return "DW_ATE_address";
3981 case DW_ATE_boolean:
3982 return "DW_ATE_boolean";
3983 case DW_ATE_complex_float:
3984 return "DW_ATE_complex_float";
3986 return "DW_ATE_float";
3988 return "DW_ATE_signed";
3989 case DW_ATE_signed_char:
3990 return "DW_ATE_signed_char";
3991 case DW_ATE_unsigned:
3992 return "DW_ATE_unsigned";
3993 case DW_ATE_unsigned_char:
3994 return "DW_ATE_unsigned_char";
3996 return "DW_ATE_<unknown>";
4001 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
4002 instance of an inlined instance of a decl which is local to an inline
4003 function, so we have to trace all of the way back through the origin chain
4004 to find out what sort of node actually served as the original seed for the
4008 decl_ultimate_origin (decl)
4011 /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the
4012 nodes in the function to point to themselves; ignore that if
4013 we're trying to output the abstract instance of this function. */
4014 if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl)
4017 #ifdef ENABLE_CHECKING
4018 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
4019 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
4020 most distant ancestor, this should never happen. */
4024 return DECL_ABSTRACT_ORIGIN (decl);
4027 /* Determine the "ultimate origin" of a block. The block may be an inlined
4028 instance of an inlined instance of a block which is local to an inline
4029 function, so we have to trace all of the way back through the origin chain
4030 to find out what sort of node actually served as the original seed for the
4034 block_ultimate_origin (block)
4035 register tree block;
4037 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
4039 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
4040 nodes in the function to point to themselves; ignore that if
4041 we're trying to output the abstract instance of this function. */
4042 if (BLOCK_ABSTRACT (block) && immediate_origin == block)
4045 if (immediate_origin == NULL_TREE)
4049 register tree ret_val;
4050 register tree lookahead = immediate_origin;
4054 ret_val = lookahead;
4055 lookahead = (TREE_CODE (ret_val) == BLOCK)
4056 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
4059 while (lookahead != NULL && lookahead != ret_val);
4065 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
4066 of a virtual function may refer to a base class, so we check the 'this'
4070 decl_class_context (decl)
4073 tree context = NULL_TREE;
4075 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
4076 context = DECL_CONTEXT (decl);
4078 context = TYPE_MAIN_VARIANT
4079 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
4081 if (context && !TYPE_P (context))
4082 context = NULL_TREE;
4087 /* Add an attribute/value pair to a DIE. We build the lists up in reverse
4088 addition order, and correct that in add_sibling_attributes. */
4091 add_dwarf_attr (die, attr)
4092 register dw_die_ref die;
4093 register dw_attr_ref attr;
4095 if (die != NULL && attr != NULL)
4097 attr->dw_attr_next = die->die_attr;
4098 die->die_attr = attr;
4102 static inline dw_val_class AT_class PARAMS ((dw_attr_ref));
4103 static inline dw_val_class
4107 return a->dw_attr_val.val_class;
4110 /* Add a flag value attribute to a DIE. */
4113 add_AT_flag (die, attr_kind, flag)
4114 register dw_die_ref die;
4115 register enum dwarf_attribute attr_kind;
4116 register unsigned flag;
4118 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4120 attr->dw_attr_next = NULL;
4121 attr->dw_attr = attr_kind;
4122 attr->dw_attr_val.val_class = dw_val_class_flag;
4123 attr->dw_attr_val.v.val_flag = flag;
4124 add_dwarf_attr (die, attr);
4127 static inline unsigned AT_flag PARAMS ((dw_attr_ref));
4128 static inline unsigned
4130 register dw_attr_ref a;
4132 if (a && AT_class (a) == dw_val_class_flag)
4133 return a->dw_attr_val.v.val_flag;
4138 /* Add a signed integer attribute value to a DIE. */
4141 add_AT_int (die, attr_kind, int_val)
4142 register dw_die_ref die;
4143 register enum dwarf_attribute attr_kind;
4144 register long int int_val;
4146 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4148 attr->dw_attr_next = NULL;
4149 attr->dw_attr = attr_kind;
4150 attr->dw_attr_val.val_class = dw_val_class_const;
4151 attr->dw_attr_val.v.val_int = int_val;
4152 add_dwarf_attr (die, attr);
4155 static inline long int AT_int PARAMS ((dw_attr_ref));
4156 static inline long int
4158 register dw_attr_ref a;
4160 if (a && AT_class (a) == dw_val_class_const)
4161 return a->dw_attr_val.v.val_int;
4166 /* Add an unsigned integer attribute value to a DIE. */
4169 add_AT_unsigned (die, attr_kind, unsigned_val)
4170 register dw_die_ref die;
4171 register enum dwarf_attribute attr_kind;
4172 register unsigned long unsigned_val;
4174 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4176 attr->dw_attr_next = NULL;
4177 attr->dw_attr = attr_kind;
4178 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
4179 attr->dw_attr_val.v.val_unsigned = unsigned_val;
4180 add_dwarf_attr (die, attr);
4183 static inline unsigned long AT_unsigned PARAMS ((dw_attr_ref));
4184 static inline unsigned long
4186 register dw_attr_ref a;
4188 if (a && AT_class (a) == dw_val_class_unsigned_const)
4189 return a->dw_attr_val.v.val_unsigned;
4194 /* Add an unsigned double integer attribute value to a DIE. */
4197 add_AT_long_long (die, attr_kind, val_hi, val_low)
4198 register dw_die_ref die;
4199 register enum dwarf_attribute attr_kind;
4200 register unsigned long val_hi;
4201 register unsigned long val_low;
4203 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4205 attr->dw_attr_next = NULL;
4206 attr->dw_attr = attr_kind;
4207 attr->dw_attr_val.val_class = dw_val_class_long_long;
4208 attr->dw_attr_val.v.val_long_long.hi = val_hi;
4209 attr->dw_attr_val.v.val_long_long.low = val_low;
4210 add_dwarf_attr (die, attr);
4213 /* Add a floating point attribute value to a DIE and return it. */
4216 add_AT_float (die, attr_kind, length, array)
4217 register dw_die_ref die;
4218 register enum dwarf_attribute attr_kind;
4219 register unsigned length;
4220 register long *array;
4222 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4224 attr->dw_attr_next = NULL;
4225 attr->dw_attr = attr_kind;
4226 attr->dw_attr_val.val_class = dw_val_class_float;
4227 attr->dw_attr_val.v.val_float.length = length;
4228 attr->dw_attr_val.v.val_float.array = array;
4229 add_dwarf_attr (die, attr);
4232 /* Add a string attribute value to a DIE. */
4235 add_AT_string (die, attr_kind, str)
4236 register dw_die_ref die;
4237 register enum dwarf_attribute attr_kind;
4238 register const char *str;
4240 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4242 attr->dw_attr_next = NULL;
4243 attr->dw_attr = attr_kind;
4244 attr->dw_attr_val.val_class = dw_val_class_str;
4245 attr->dw_attr_val.v.val_str = xstrdup (str);
4246 add_dwarf_attr (die, attr);
4249 static inline const char *AT_string PARAMS ((dw_attr_ref));
4250 static inline const char *
4252 register dw_attr_ref a;
4254 if (a && AT_class (a) == dw_val_class_str)
4255 return a->dw_attr_val.v.val_str;
4260 /* Add a DIE reference attribute value to a DIE. */
4263 add_AT_die_ref (die, attr_kind, targ_die)
4264 register dw_die_ref die;
4265 register enum dwarf_attribute attr_kind;
4266 register dw_die_ref targ_die;
4268 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4270 attr->dw_attr_next = NULL;
4271 attr->dw_attr = attr_kind;
4272 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4273 attr->dw_attr_val.v.val_die_ref = targ_die;
4274 add_dwarf_attr (die, attr);
4277 static inline dw_die_ref AT_ref PARAMS ((dw_attr_ref));
4278 static inline dw_die_ref
4280 register dw_attr_ref a;
4282 if (a && AT_class (a) == dw_val_class_die_ref)
4283 return a->dw_attr_val.v.val_die_ref;
4288 /* Add an FDE reference attribute value to a DIE. */
4291 add_AT_fde_ref (die, attr_kind, targ_fde)
4292 register dw_die_ref die;
4293 register enum dwarf_attribute attr_kind;
4294 register unsigned targ_fde;
4296 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4298 attr->dw_attr_next = NULL;
4299 attr->dw_attr = attr_kind;
4300 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
4301 attr->dw_attr_val.v.val_fde_index = targ_fde;
4302 add_dwarf_attr (die, attr);
4305 /* Add a location description attribute value to a DIE. */
4308 add_AT_loc (die, attr_kind, loc)
4309 register dw_die_ref die;
4310 register enum dwarf_attribute attr_kind;
4311 register dw_loc_descr_ref loc;
4313 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4315 attr->dw_attr_next = NULL;
4316 attr->dw_attr = attr_kind;
4317 attr->dw_attr_val.val_class = dw_val_class_loc;
4318 attr->dw_attr_val.v.val_loc = loc;
4319 add_dwarf_attr (die, attr);
4322 static inline dw_loc_descr_ref AT_loc PARAMS ((dw_attr_ref));
4323 static inline dw_loc_descr_ref
4325 register dw_attr_ref a;
4327 if (a && AT_class (a) == dw_val_class_loc)
4328 return a->dw_attr_val.v.val_loc;
4333 /* Add an address constant attribute value to a DIE. */
4336 add_AT_addr (die, attr_kind, addr)
4337 register dw_die_ref die;
4338 register enum dwarf_attribute attr_kind;
4341 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4343 attr->dw_attr_next = NULL;
4344 attr->dw_attr = attr_kind;
4345 attr->dw_attr_val.val_class = dw_val_class_addr;
4346 attr->dw_attr_val.v.val_addr = addr;
4347 add_dwarf_attr (die, attr);
4350 static inline rtx AT_addr PARAMS ((dw_attr_ref));
4353 register dw_attr_ref a;
4355 if (a && AT_class (a) == dw_val_class_addr)
4356 return a->dw_attr_val.v.val_addr;
4361 /* Add a label identifier attribute value to a DIE. */
4364 add_AT_lbl_id (die, attr_kind, lbl_id)
4365 register dw_die_ref die;
4366 register enum dwarf_attribute attr_kind;
4367 register const char *lbl_id;
4369 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4371 attr->dw_attr_next = NULL;
4372 attr->dw_attr = attr_kind;
4373 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
4374 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
4375 add_dwarf_attr (die, attr);
4378 /* Add a section offset attribute value to a DIE. */
4381 add_AT_lbl_offset (die, attr_kind, label)
4382 register dw_die_ref die;
4383 register enum dwarf_attribute attr_kind;
4384 register const char *label;
4386 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4388 attr->dw_attr_next = NULL;
4389 attr->dw_attr = attr_kind;
4390 attr->dw_attr_val.val_class = dw_val_class_lbl_offset;
4391 attr->dw_attr_val.v.val_lbl_id = xstrdup (label);
4392 add_dwarf_attr (die, attr);
4396 static inline const char *AT_lbl PARAMS ((dw_attr_ref));
4397 static inline const char *
4399 register dw_attr_ref a;
4401 if (a && (AT_class (a) == dw_val_class_lbl_id
4402 || AT_class (a) == dw_val_class_lbl_offset))
4403 return a->dw_attr_val.v.val_lbl_id;
4408 /* Get the attribute of type attr_kind. */
4410 static inline dw_attr_ref
4411 get_AT (die, attr_kind)
4412 register dw_die_ref die;
4413 register enum dwarf_attribute attr_kind;
4415 register dw_attr_ref a;
4416 register dw_die_ref spec = NULL;
4420 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4422 if (a->dw_attr == attr_kind)
4425 if (a->dw_attr == DW_AT_specification
4426 || a->dw_attr == DW_AT_abstract_origin)
4431 return get_AT (spec, attr_kind);
4437 /* Return the "low pc" attribute value, typically associated with
4438 a subprogram DIE. Return null if the "low pc" attribute is
4439 either not prsent, or if it cannot be represented as an
4440 assembler label identifier. */
4442 static inline const char *
4444 register dw_die_ref die;
4446 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
4450 /* Return the "high pc" attribute value, typically associated with
4451 a subprogram DIE. Return null if the "high pc" attribute is
4452 either not prsent, or if it cannot be represented as an
4453 assembler label identifier. */
4455 static inline const char *
4457 register dw_die_ref die;
4459 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
4463 /* Return the value of the string attribute designated by ATTR_KIND, or
4464 NULL if it is not present. */
4466 static inline const char *
4467 get_AT_string (die, attr_kind)
4468 register dw_die_ref die;
4469 register enum dwarf_attribute attr_kind;
4471 register dw_attr_ref a = get_AT (die, attr_kind);
4472 return AT_string (a);
4475 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
4476 if it is not present. */
4479 get_AT_flag (die, attr_kind)
4480 register dw_die_ref die;
4481 register enum dwarf_attribute attr_kind;
4483 register dw_attr_ref a = get_AT (die, attr_kind);
4487 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
4488 if it is not present. */
4490 static inline unsigned
4491 get_AT_unsigned (die, attr_kind)
4492 register dw_die_ref die;
4493 register enum dwarf_attribute attr_kind;
4495 register dw_attr_ref a = get_AT (die, attr_kind);
4496 return AT_unsigned (a);
4499 static inline dw_die_ref
4500 get_AT_ref (die, attr_kind)
4502 register enum dwarf_attribute attr_kind;
4504 register dw_attr_ref a = get_AT (die, attr_kind);
4511 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4513 return (lang == DW_LANG_C || lang == DW_LANG_C89
4514 || lang == DW_LANG_C_plus_plus);
4520 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4522 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
4525 /* Free up the memory used by A. */
4527 static inline void free_AT PARAMS ((dw_attr_ref));
4532 switch (AT_class (a))
4534 case dw_val_class_str:
4535 case dw_val_class_lbl_id:
4536 case dw_val_class_lbl_offset:
4537 free (a->dw_attr_val.v.val_str);
4547 /* Remove the specified attribute if present. */
4550 remove_AT (die, attr_kind)
4551 register dw_die_ref die;
4552 register enum dwarf_attribute attr_kind;
4554 register dw_attr_ref *p;
4555 register dw_attr_ref removed = NULL;
4559 for (p = &(die->die_attr); *p; p = &((*p)->dw_attr_next))
4560 if ((*p)->dw_attr == attr_kind)
4563 *p = (*p)->dw_attr_next;
4572 /* Free up the memory used by DIE. */
4574 static inline void free_die PARAMS ((dw_die_ref));
4579 remove_children (die);
4583 /* Discard the children of this DIE. */
4586 remove_children (die)
4587 register dw_die_ref die;
4589 register dw_die_ref child_die = die->die_child;
4591 die->die_child = NULL;
4593 while (child_die != NULL)
4595 register dw_die_ref tmp_die = child_die;
4596 register dw_attr_ref a;
4598 child_die = child_die->die_sib;
4600 for (a = tmp_die->die_attr; a != NULL; )
4602 register dw_attr_ref tmp_a = a;
4604 a = a->dw_attr_next;
4612 /* Add a child DIE below its parent. We build the lists up in reverse
4613 addition order, and correct that in add_sibling_attributes. */
4616 add_child_die (die, child_die)
4617 register dw_die_ref die;
4618 register dw_die_ref child_die;
4620 if (die != NULL && child_die != NULL)
4622 if (die == child_die)
4624 child_die->die_parent = die;
4625 child_die->die_sib = die->die_child;
4626 die->die_child = child_die;
4630 /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT
4631 is the specification, to the front of PARENT's list of children. */
4634 splice_child_die (parent, child)
4635 dw_die_ref parent, child;
4639 /* We want the declaration DIE from inside the class, not the
4640 specification DIE at toplevel. */
4641 if (child->die_parent != parent)
4643 dw_die_ref tmp = get_AT_ref (child, DW_AT_specification);
4648 if (child->die_parent != parent
4649 && child->die_parent != get_AT_ref (parent, DW_AT_specification))
4652 for (p = &(parent->die_child); *p; p = &((*p)->die_sib))
4655 *p = child->die_sib;
4659 child->die_sib = parent->die_child;
4660 parent->die_child = child;
4663 /* Return a pointer to a newly created DIE node. */
4665 static inline dw_die_ref
4666 new_die (tag_value, parent_die)
4667 register enum dwarf_tag tag_value;
4668 register dw_die_ref parent_die;
4670 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4672 die->die_tag = tag_value;
4673 die->die_abbrev = 0;
4674 die->die_offset = 0;
4675 die->die_child = NULL;
4676 die->die_parent = NULL;
4677 die->die_sib = NULL;
4678 die->die_attr = NULL;
4680 if (parent_die != NULL)
4681 add_child_die (parent_die, die);
4684 limbo_die_node *limbo_node;
4686 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4687 limbo_node->die = die;
4688 limbo_node->next = limbo_die_list;
4689 limbo_die_list = limbo_node;
4695 /* Return the DIE associated with the given type specifier. */
4697 static inline dw_die_ref
4698 lookup_type_die (type)
4701 if (TREE_CODE (type) == VECTOR_TYPE)
4702 type = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4703 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4706 /* Equate a DIE to a given type specifier. */
4709 equate_type_number_to_die (type, type_die)
4711 register dw_die_ref type_die;
4713 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4716 /* Return the DIE associated with a given declaration. */
4718 static inline dw_die_ref
4719 lookup_decl_die (decl)
4722 register unsigned decl_id = DECL_UID (decl);
4724 return (decl_id < decl_die_table_in_use
4725 ? decl_die_table[decl_id] : NULL);
4728 /* Equate a DIE to a particular declaration. */
4731 equate_decl_number_to_die (decl, decl_die)
4733 register dw_die_ref decl_die;
4735 register unsigned decl_id = DECL_UID (decl);
4736 register unsigned num_allocated;
4738 if (decl_id >= decl_die_table_allocated)
4741 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4742 / DECL_DIE_TABLE_INCREMENT)
4743 * DECL_DIE_TABLE_INCREMENT;
4746 = (dw_die_ref *) xrealloc (decl_die_table,
4747 sizeof (dw_die_ref) * num_allocated);
4749 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4750 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4751 decl_die_table_allocated = num_allocated;
4754 if (decl_id >= decl_die_table_in_use)
4755 decl_die_table_in_use = (decl_id + 1);
4757 decl_die_table[decl_id] = decl_die;
4760 /* Keep track of the number of spaces used to indent the
4761 output of the debugging routines that print the structure of
4762 the DIE internal representation. */
4763 static int print_indent;
4765 /* Indent the line the number of spaces given by print_indent. */
4768 print_spaces (outfile)
4771 fprintf (outfile, "%*s", print_indent, "");
4774 /* Print the information associated with a given DIE, and its children.
4775 This routine is a debugging aid only. */
4778 print_die (die, outfile)
4782 register dw_attr_ref a;
4783 register dw_die_ref c;
4785 print_spaces (outfile);
4786 fprintf (outfile, "DIE %4lu: %s\n",
4787 die->die_offset, dwarf_tag_name (die->die_tag));
4788 print_spaces (outfile);
4789 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4790 fprintf (outfile, " offset: %lu\n", die->die_offset);
4792 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4794 print_spaces (outfile);
4795 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4797 switch (AT_class (a))
4799 case dw_val_class_addr:
4800 fprintf (outfile, "address");
4802 case dw_val_class_loc:
4803 fprintf (outfile, "location descriptor");
4805 case dw_val_class_const:
4806 fprintf (outfile, "%ld", AT_int (a));
4808 case dw_val_class_unsigned_const:
4809 fprintf (outfile, "%lu", AT_unsigned (a));
4811 case dw_val_class_long_long:
4812 fprintf (outfile, "constant (%lu,%lu)",
4813 a->dw_attr_val.v.val_long_long.hi,
4814 a->dw_attr_val.v.val_long_long.low);
4816 case dw_val_class_float:
4817 fprintf (outfile, "floating-point constant");
4819 case dw_val_class_flag:
4820 fprintf (outfile, "%u", AT_flag (a));
4822 case dw_val_class_die_ref:
4823 if (AT_ref (a) != NULL)
4824 fprintf (outfile, "die -> %lu", AT_ref (a)->die_offset);
4826 fprintf (outfile, "die -> <null>");
4828 case dw_val_class_lbl_id:
4829 case dw_val_class_lbl_offset:
4830 fprintf (outfile, "label: %s", AT_lbl (a));
4832 case dw_val_class_str:
4833 if (AT_string (a) != NULL)
4834 fprintf (outfile, "\"%s\"", AT_string (a));
4836 fprintf (outfile, "<null>");
4842 fprintf (outfile, "\n");
4845 if (die->die_child != NULL)
4848 for (c = die->die_child; c != NULL; c = c->die_sib)
4849 print_die (c, outfile);
4855 /* Print the contents of the source code line number correspondence table.
4856 This routine is a debugging aid only. */
4859 print_dwarf_line_table (outfile)
4862 register unsigned i;
4863 register dw_line_info_ref line_info;
4865 fprintf (outfile, "\n\nDWARF source line information\n");
4866 for (i = 1; i < line_info_table_in_use; ++i)
4868 line_info = &line_info_table[i];
4869 fprintf (outfile, "%5d: ", i);
4870 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4871 fprintf (outfile, "%6ld", line_info->dw_line_num);
4872 fprintf (outfile, "\n");
4875 fprintf (outfile, "\n\n");
4878 /* Print the information collected for a given DIE. */
4881 debug_dwarf_die (die)
4884 print_die (die, stderr);
4887 /* Print all DWARF information collected for the compilation unit.
4888 This routine is a debugging aid only. */
4894 print_die (comp_unit_die, stderr);
4895 if (! DWARF2_ASM_LINE_DEBUG_INFO)
4896 print_dwarf_line_table (stderr);
4899 /* We build up the lists of children and attributes by pushing new ones
4900 onto the beginning of the list. Reverse the lists for DIE so that
4901 they are in order of addition. */
4904 reverse_die_lists (die)
4905 register dw_die_ref die;
4907 register dw_die_ref c, cp, cn;
4908 register dw_attr_ref a, ap, an;
4910 for (a = die->die_attr, ap = 0; a; a = an)
4912 an = a->dw_attr_next;
4913 a->dw_attr_next = ap;
4918 for (c = die->die_child, cp = 0; c; c = cn)
4924 die->die_child = cp;
4927 /* Traverse the DIE, reverse its lists of attributes and children, and
4928 add a sibling attribute if it may have the effect of speeding up
4929 access to siblings. To save some space, avoid generating sibling
4930 attributes for DIE's without children. */
4933 add_sibling_attributes (die)
4934 register dw_die_ref die;
4936 register dw_die_ref c;
4938 reverse_die_lists (die);
4940 if (die != comp_unit_die && die->die_sib && die->die_child != NULL)
4941 /* Add the sibling link to the front of the attribute list. */
4942 add_AT_die_ref (die, DW_AT_sibling, die->die_sib);
4944 for (c = die->die_child; c != NULL; c = c->die_sib)
4945 add_sibling_attributes (c);
4948 /* The format of each DIE (and its attribute value pairs)
4949 is encoded in an abbreviation table. This routine builds the
4950 abbreviation table and assigns a unique abbreviation id for
4951 each abbreviation entry. The children of each die are visited
4955 build_abbrev_table (die)
4956 register dw_die_ref die;
4958 register unsigned long abbrev_id;
4959 register unsigned long n_alloc;
4960 register dw_die_ref c;
4961 register dw_attr_ref d_attr, a_attr;
4962 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4964 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4966 if (abbrev->die_tag == die->die_tag)
4968 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4970 a_attr = abbrev->die_attr;
4971 d_attr = die->die_attr;
4973 while (a_attr != NULL && d_attr != NULL)
4975 if ((a_attr->dw_attr != d_attr->dw_attr)
4976 || (value_format (a_attr) != value_format (d_attr)))
4979 a_attr = a_attr->dw_attr_next;
4980 d_attr = d_attr->dw_attr_next;
4983 if (a_attr == NULL && d_attr == NULL)
4989 if (abbrev_id >= abbrev_die_table_in_use)
4991 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4993 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4995 = (dw_die_ref *) xrealloc (abbrev_die_table,
4996 sizeof (dw_die_ref) * n_alloc);
4998 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4999 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
5000 abbrev_die_table_allocated = n_alloc;
5003 ++abbrev_die_table_in_use;
5004 abbrev_die_table[abbrev_id] = die;
5007 die->die_abbrev = abbrev_id;
5008 for (c = die->die_child; c != NULL; c = c->die_sib)
5009 build_abbrev_table (c);
5012 /* Return the size of a string, including the null byte.
5014 This used to treat backslashes as escapes, and hence they were not included
5015 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
5016 which treats a backslash as a backslash, escaping it if necessary, and hence
5017 we must include them in the count. */
5019 static unsigned long
5020 size_of_string (str)
5021 register const char *str;
5023 return strlen (str) + 1;
5026 /* Return the power-of-two number of bytes necessary to represent VALUE. */
5029 constant_size (value)
5030 long unsigned value;
5037 log = floor_log2 (value);
5040 log = 1 << (floor_log2 (log) + 1);
5045 /* Return the size of a DIE, as it is represented in the
5046 .debug_info section. */
5048 static unsigned long
5050 register dw_die_ref die;
5052 register unsigned long size = 0;
5053 register dw_attr_ref a;
5055 size += size_of_uleb128 (die->die_abbrev);
5056 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5058 switch (AT_class (a))
5060 case dw_val_class_addr:
5061 size += DWARF2_ADDR_SIZE;
5063 case dw_val_class_loc:
5065 register unsigned long lsize = size_of_locs (AT_loc (a));
5068 size += constant_size (lsize);
5072 case dw_val_class_const:
5073 size += size_of_sleb128 (AT_int (a));
5075 case dw_val_class_unsigned_const:
5076 size += constant_size (AT_unsigned (a));
5078 case dw_val_class_long_long:
5079 size += 1 + 8; /* block */
5081 case dw_val_class_float:
5082 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
5084 case dw_val_class_flag:
5087 case dw_val_class_die_ref:
5088 size += DWARF_OFFSET_SIZE;
5090 case dw_val_class_fde_ref:
5091 size += DWARF_OFFSET_SIZE;
5093 case dw_val_class_lbl_id:
5094 size += DWARF2_ADDR_SIZE;
5096 case dw_val_class_lbl_offset:
5097 size += DWARF_OFFSET_SIZE;
5099 case dw_val_class_str:
5100 size += size_of_string (AT_string (a));
5110 /* Size the debugging information associated with a given DIE.
5111 Visits the DIE's children recursively. Updates the global
5112 variable next_die_offset, on each time through. Uses the
5113 current value of next_die_offset to update the die_offset
5114 field in each DIE. */
5117 calc_die_sizes (die)
5120 register dw_die_ref c;
5121 die->die_offset = next_die_offset;
5122 next_die_offset += size_of_die (die);
5124 for (c = die->die_child; c != NULL; c = c->die_sib)
5127 if (die->die_child != NULL)
5128 /* Count the null byte used to terminate sibling lists. */
5129 next_die_offset += 1;
5132 /* Return the size of the line information prolog generated for the
5133 compilation unit. */
5135 static unsigned long
5136 size_of_line_prolog ()
5138 register unsigned long size;
5139 register unsigned long ft_index;
5141 size = DWARF_LINE_PROLOG_HEADER_SIZE;
5143 /* Count the size of the table giving number of args for each
5145 size += DWARF_LINE_OPCODE_BASE - 1;
5147 /* Include directory table is empty (at present). Count only the
5148 null byte used to terminate the table. */
5151 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5153 /* File name entry. */
5154 size += size_of_string (file_table[ft_index]);
5156 /* Include directory index. */
5157 size += size_of_uleb128 (0);
5159 /* Modification time. */
5160 size += size_of_uleb128 (0);
5162 /* File length in bytes. */
5163 size += size_of_uleb128 (0);
5166 /* Count the file table terminator. */
5171 /* Return the size of the .debug_pubnames table generated for the
5172 compilation unit. */
5174 static unsigned long
5177 register unsigned long size;
5178 register unsigned i;
5180 size = DWARF_PUBNAMES_HEADER_SIZE;
5181 for (i = 0; i < pubname_table_in_use; ++i)
5183 register pubname_ref p = &pubname_table[i];
5184 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
5187 size += DWARF_OFFSET_SIZE;
5191 /* Return the size of the information in the .debug_aranges section. */
5193 static unsigned long
5196 register unsigned long size;
5198 size = DWARF_ARANGES_HEADER_SIZE;
5200 /* Count the address/length pair for this compilation unit. */
5201 size += 2 * DWARF2_ADDR_SIZE;
5202 size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use;
5204 /* Count the two zero words used to terminated the address range table. */
5205 size += 2 * DWARF2_ADDR_SIZE;
5209 /* Select the encoding of an attribute value. */
5211 static enum dwarf_form
5215 switch (a->dw_attr_val.val_class)
5217 case dw_val_class_addr:
5218 return DW_FORM_addr;
5219 case dw_val_class_loc:
5220 switch (constant_size (size_of_locs (AT_loc (a))))
5223 return DW_FORM_block1;
5225 return DW_FORM_block2;
5229 case dw_val_class_const:
5230 return DW_FORM_sdata;
5231 case dw_val_class_unsigned_const:
5232 switch (constant_size (AT_unsigned (a)))
5235 return DW_FORM_data1;
5237 return DW_FORM_data2;
5239 return DW_FORM_data4;
5241 return DW_FORM_data8;
5245 case dw_val_class_long_long:
5246 return DW_FORM_block1;
5247 case dw_val_class_float:
5248 return DW_FORM_block1;
5249 case dw_val_class_flag:
5250 return DW_FORM_flag;
5251 case dw_val_class_die_ref:
5253 case dw_val_class_fde_ref:
5254 return DW_FORM_data;
5255 case dw_val_class_lbl_id:
5256 return DW_FORM_addr;
5257 case dw_val_class_lbl_offset:
5258 return DW_FORM_data;
5259 case dw_val_class_str:
5260 return DW_FORM_string;
5266 /* Output the encoding of an attribute value. */
5269 output_value_format (a)
5272 enum dwarf_form form = value_format (a);
5274 output_uleb128 (form);
5276 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
5278 fputc ('\n', asm_out_file);
5281 /* Output the .debug_abbrev section which defines the DIE abbreviation
5285 output_abbrev_section ()
5287 unsigned long abbrev_id;
5290 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5292 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5294 output_uleb128 (abbrev_id);
5296 fprintf (asm_out_file, " (abbrev code)");
5298 fputc ('\n', asm_out_file);
5299 output_uleb128 (abbrev->die_tag);
5301 fprintf (asm_out_file, " (TAG: %s)",
5302 dwarf_tag_name (abbrev->die_tag));
5304 fputc ('\n', asm_out_file);
5305 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5306 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5309 fprintf (asm_out_file, "\t%s %s",
5311 (abbrev->die_child != NULL
5312 ? "DW_children_yes" : "DW_children_no"));
5314 fputc ('\n', asm_out_file);
5316 for (a_attr = abbrev->die_attr; a_attr != NULL;
5317 a_attr = a_attr->dw_attr_next)
5319 output_uleb128 (a_attr->dw_attr);
5321 fprintf (asm_out_file, " (%s)",
5322 dwarf_attr_name (a_attr->dw_attr));
5324 fputc ('\n', asm_out_file);
5325 output_value_format (a_attr);
5328 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5331 /* Terminate the table. */
5332 fprintf (asm_out_file, "\t%s\t0\n", ASM_BYTE_OP);
5335 /* Output the DIE and its attributes. Called recursively to generate
5336 the definitions of each child DIE. */
5340 register dw_die_ref die;
5342 register dw_attr_ref a;
5343 register dw_die_ref c;
5344 register unsigned long size;
5346 output_uleb128 (die->die_abbrev);
5348 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5349 die->die_offset, dwarf_tag_name (die->die_tag));
5351 fputc ('\n', asm_out_file);
5353 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5355 switch (AT_class (a))
5357 case dw_val_class_addr:
5358 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, AT_addr (a));
5361 case dw_val_class_loc:
5362 size = size_of_locs (AT_loc (a));
5364 /* Output the block length for this list of location operations. */
5365 switch (constant_size (size))
5368 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5371 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5378 fprintf (asm_out_file, "\t%s %s",
5379 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5381 fputc ('\n', asm_out_file);
5383 output_loc_sequence (AT_loc (a));
5386 case dw_val_class_const:
5387 /* ??? It would be slightly more efficient to use a scheme like is
5388 used for unsigned constants below, but gdb 4.x does not sign
5389 extend. Gdb 5.x does sign extend. */
5390 output_sleb128 (AT_int (a));
5393 case dw_val_class_unsigned_const:
5394 switch (constant_size (AT_unsigned (a)))
5397 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, AT_unsigned (a));
5400 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, AT_unsigned (a));
5403 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, AT_unsigned (a));
5406 ASM_OUTPUT_DWARF_DATA8 (asm_out_file, AT_unsigned (a));
5413 case dw_val_class_long_long:
5414 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5416 fprintf (asm_out_file, "\t%s %s",
5417 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5419 fputc ('\n', asm_out_file);
5420 ASM_OUTPUT_DWARF_CONST_DOUBLE (asm_out_file,
5421 a->dw_attr_val.v.val_long_long.hi,
5422 a->dw_attr_val.v.val_long_long.low);
5425 fprintf (asm_out_file,
5426 "\t%s long long constant", ASM_COMMENT_START);
5428 fputc ('\n', asm_out_file);
5431 case dw_val_class_float:
5433 register unsigned int i;
5434 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5435 a->dw_attr_val.v.val_float.length * 4);
5437 fprintf (asm_out_file, "\t%s %s",
5438 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5440 fputc ('\n', asm_out_file);
5441 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5443 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5444 a->dw_attr_val.v.val_float.array[i]);
5446 fprintf (asm_out_file, "\t%s fp constant word %u",
5447 ASM_COMMENT_START, i);
5449 fputc ('\n', asm_out_file);
5454 case dw_val_class_flag:
5455 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, AT_flag (a));
5458 case dw_val_class_die_ref:
5459 ASM_OUTPUT_DWARF_DATA (asm_out_file, AT_ref (a)->die_offset);
5462 case dw_val_class_fde_ref:
5465 ASM_GENERATE_INTERNAL_LABEL
5466 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5467 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5468 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5472 case dw_val_class_lbl_id:
5473 ASM_OUTPUT_DWARF_ADDR (asm_out_file, AT_lbl (a));
5476 case dw_val_class_lbl_offset:
5477 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, AT_lbl (a));
5480 case dw_val_class_str:
5482 ASM_OUTPUT_DWARF_STRING (asm_out_file, AT_string (a));
5484 ASM_OUTPUT_ASCII (asm_out_file, AT_string (a),
5485 (int) strlen (AT_string (a)) + 1);
5492 if (AT_class (a) != dw_val_class_loc
5493 && AT_class (a) != dw_val_class_long_long
5494 && AT_class (a) != dw_val_class_float)
5497 fprintf (asm_out_file, "\t%s %s",
5498 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5500 fputc ('\n', asm_out_file);
5504 for (c = die->die_child; c != NULL; c = c->die_sib)
5507 if (die->die_child != NULL)
5509 /* Add null byte to terminate sibling list. */
5510 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5512 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5513 ASM_COMMENT_START, die->die_offset);
5515 fputc ('\n', asm_out_file);
5519 /* Output the compilation unit that appears at the beginning of the
5520 .debug_info section, and precedes the DIE descriptions. */
5523 output_compilation_unit_header ()
5525 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5527 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5530 fputc ('\n', asm_out_file);
5531 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5533 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5535 fputc ('\n', asm_out_file);
5536 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, abbrev_section_label);
5538 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5541 fputc ('\n', asm_out_file);
5542 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF2_ADDR_SIZE);
5544 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5546 fputc ('\n', asm_out_file);
5549 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5550 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5551 argument list, and maybe the scope. */
5554 dwarf2_name (decl, scope)
5558 return (*decl_printable_name) (decl, scope ? 1 : 0);
5561 /* Add a new entry to .debug_pubnames if appropriate. */
5564 add_pubname (decl, die)
5570 if (! TREE_PUBLIC (decl))
5573 if (pubname_table_in_use == pubname_table_allocated)
5575 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5576 pubname_table = (pubname_ref) xrealloc
5577 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5580 p = &pubname_table[pubname_table_in_use++];
5583 p->name = xstrdup (dwarf2_name (decl, 1));
5586 /* Output the public names table used to speed up access to externally
5587 visible names. For now, only generate entries for externally
5588 visible procedures. */
5593 register unsigned i;
5594 register unsigned long pubnames_length = size_of_pubnames ();
5596 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5599 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5602 fputc ('\n', asm_out_file);
5603 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5606 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5608 fputc ('\n', asm_out_file);
5609 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5611 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5614 fputc ('\n', asm_out_file);
5615 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5617 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5619 fputc ('\n', asm_out_file);
5620 for (i = 0; i < pubname_table_in_use; ++i)
5622 register pubname_ref pub = &pubname_table[i];
5624 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5626 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5628 fputc ('\n', asm_out_file);
5632 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5633 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5637 ASM_OUTPUT_ASCII (asm_out_file, pub->name,
5638 (int) strlen (pub->name) + 1);
5641 fputc ('\n', asm_out_file);
5644 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5645 fputc ('\n', asm_out_file);
5648 /* Add a new entry to .debug_aranges if appropriate. */
5651 add_arange (decl, die)
5655 if (! DECL_SECTION_NAME (decl))
5658 if (arange_table_in_use == arange_table_allocated)
5660 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5662 = (arange_ref) xrealloc (arange_table,
5663 arange_table_allocated * sizeof (dw_die_ref));
5666 arange_table[arange_table_in_use++] = die;
5669 /* Output the information that goes into the .debug_aranges table.
5670 Namely, define the beginning and ending address range of the
5671 text section generated for this compilation unit. */
5676 register unsigned i;
5677 register unsigned long aranges_length = size_of_aranges ();
5679 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5681 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5684 fputc ('\n', asm_out_file);
5685 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5687 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5689 fputc ('\n', asm_out_file);
5690 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5692 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5695 fputc ('\n', asm_out_file);
5696 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF2_ADDR_SIZE);
5698 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5700 fputc ('\n', asm_out_file);
5701 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5703 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5706 fputc ('\n', asm_out_file);
5708 /* We need to align to twice the pointer size here. */
5709 if (DWARF_ARANGES_PAD_SIZE)
5711 /* Pad using a 2 bytes word so that padding is correct
5712 for any pointer size. */
5713 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, 0);
5714 for (i = 2; i < DWARF_ARANGES_PAD_SIZE; i += 2)
5715 fprintf (asm_out_file, ",0");
5717 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5718 ASM_COMMENT_START, 2 * DWARF2_ADDR_SIZE);
5721 fputc ('\n', asm_out_file);
5722 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_section_label);
5724 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5726 fputc ('\n', asm_out_file);
5727 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5728 text_section_label);
5730 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5732 fputc ('\n', asm_out_file);
5733 for (i = 0; i < arange_table_in_use; ++i)
5735 dw_die_ref die = arange_table[i];
5737 if (die->die_tag == DW_TAG_subprogram)
5738 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (die));
5741 /* A static variable; extract the symbol from DW_AT_location.
5742 Note that this code isn't currently hit, as we only emit
5743 aranges for functions (jason 9/23/99). */
5745 dw_attr_ref a = get_AT (die, DW_AT_location);
5746 dw_loc_descr_ref loc;
5747 if (! a || AT_class (a) != dw_val_class_loc)
5751 if (loc->dw_loc_opc != DW_OP_addr)
5754 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5755 loc->dw_loc_oprnd1.v.val_addr);
5759 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5761 fputc ('\n', asm_out_file);
5762 if (die->die_tag == DW_TAG_subprogram)
5763 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (die),
5764 get_AT_low_pc (die));
5766 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5767 get_AT_unsigned (die, DW_AT_byte_size));
5770 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5772 fputc ('\n', asm_out_file);
5775 /* Output the terminator words. */
5776 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5777 fputc ('\n', asm_out_file);
5778 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5779 fputc ('\n', asm_out_file);
5782 /* Output the source line number correspondence information. This
5783 information goes into the .debug_line section. */
5788 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5789 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5790 register unsigned opc;
5791 register unsigned n_op_args;
5792 register unsigned long ft_index;
5793 register unsigned long lt_index;
5794 register unsigned long current_line;
5795 register long line_offset;
5796 register long line_delta;
5797 register unsigned long current_file;
5798 register unsigned long function;
5800 ASM_OUTPUT_DWARF_DELTA (asm_out_file, ".LTEND", ".LTSTART");
5802 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5805 fputc ('\n', asm_out_file);
5806 ASM_OUTPUT_LABEL (asm_out_file, ".LTSTART");
5807 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5809 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5811 fputc ('\n', asm_out_file);
5812 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5814 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5816 fputc ('\n', asm_out_file);
5817 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5819 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5822 fputc ('\n', asm_out_file);
5823 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5825 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5828 fputc ('\n', asm_out_file);
5829 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5831 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5834 fputc ('\n', asm_out_file);
5835 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5837 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5840 fputc ('\n', asm_out_file);
5841 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5843 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5845 fputc ('\n', asm_out_file);
5846 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5850 case DW_LNS_advance_pc:
5851 case DW_LNS_advance_line:
5852 case DW_LNS_set_file:
5853 case DW_LNS_set_column:
5854 case DW_LNS_fixed_advance_pc:
5861 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5863 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5864 ASM_COMMENT_START, opc, n_op_args);
5865 fputc ('\n', asm_out_file);
5869 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5871 /* Include directory table is empty, at present */
5872 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5873 fputc ('\n', asm_out_file);
5875 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5877 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5881 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5882 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5883 ASM_COMMENT_START, ft_index);
5887 ASM_OUTPUT_ASCII (asm_out_file,
5888 file_table[ft_index],
5889 (int) strlen (file_table[ft_index]) + 1);
5892 fputc ('\n', asm_out_file);
5894 /* Include directory index */
5896 fputc ('\n', asm_out_file);
5898 /* Modification time */
5900 fputc ('\n', asm_out_file);
5902 /* File length in bytes */
5904 fputc ('\n', asm_out_file);
5907 /* Terminate the file name table */
5908 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5909 fputc ('\n', asm_out_file);
5911 /* We used to set the address register to the first location in the text
5912 section here, but that didn't accomplish anything since we already
5913 have a line note for the opening brace of the first function. */
5915 /* Generate the line number to PC correspondence table, encoded as
5916 a series of state machine operations. */
5919 strcpy (prev_line_label, text_section_label);
5920 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5922 register dw_line_info_ref line_info = &line_info_table[lt_index];
5925 /* Disable this optimization for now; GDB wants to see two line notes
5926 at the beginning of a function so it can find the end of the
5929 /* Don't emit anything for redundant notes. Just updating the
5930 address doesn't accomplish anything, because we already assume
5931 that anything after the last address is this line. */
5932 if (line_info->dw_line_num == current_line
5933 && line_info->dw_file_num == current_file)
5937 /* Emit debug info for the address of the current line, choosing
5938 the encoding that uses the least amount of space. */
5939 /* ??? Unfortunately, we have little choice here currently, and must
5940 always use the most general form. Gcc does not know the address
5941 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5942 dwarf2 aware assemblers at this time, so we can't use any special
5943 pseudo ops that would allow the assembler to optimally encode this for
5944 us. Many ports do have length attributes which will give an upper
5945 bound on the address range. We could perhaps use length attributes
5946 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5947 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5950 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5951 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5953 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5956 fputc ('\n', asm_out_file);
5957 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5958 fputc ('\n', asm_out_file);
5962 /* This can handle any delta. This takes
5963 4+DWARF2_ADDR_SIZE bytes. */
5964 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5966 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5968 fputc ('\n', asm_out_file);
5969 output_uleb128 (1 + DWARF2_ADDR_SIZE);
5970 fputc ('\n', asm_out_file);
5971 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5972 fputc ('\n', asm_out_file);
5973 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5974 fputc ('\n', asm_out_file);
5976 strcpy (prev_line_label, line_label);
5978 /* Emit debug info for the source file of the current line, if
5979 different from the previous line. */
5980 if (line_info->dw_file_num != current_file)
5982 current_file = line_info->dw_file_num;
5983 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5985 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5987 fputc ('\n', asm_out_file);
5988 output_uleb128 (current_file);
5990 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5992 fputc ('\n', asm_out_file);
5995 /* Emit debug info for the current line number, choosing the encoding
5996 that uses the least amount of space. */
5997 if (line_info->dw_line_num != current_line)
5999 line_offset = line_info->dw_line_num - current_line;
6000 line_delta = line_offset - DWARF_LINE_BASE;
6001 current_line = line_info->dw_line_num;
6002 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6004 /* This can handle deltas from -10 to 234, using the current
6005 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
6007 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6008 DWARF_LINE_OPCODE_BASE + line_delta);
6010 fprintf (asm_out_file,
6011 "\t%s line %ld", ASM_COMMENT_START, current_line);
6013 fputc ('\n', asm_out_file);
6017 /* This can handle any delta. This takes at least 4 bytes,
6018 depending on the value being encoded. */
6019 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6021 fprintf (asm_out_file, "\t%s advance to line %ld",
6022 ASM_COMMENT_START, current_line);
6024 fputc ('\n', asm_out_file);
6025 output_sleb128 (line_offset);
6026 fputc ('\n', asm_out_file);
6027 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6029 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6030 fputc ('\n', asm_out_file);
6035 /* We still need to start a new row, so output a copy insn. */
6036 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6038 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6039 fputc ('\n', asm_out_file);
6043 /* Emit debug info for the address of the end of the function. */
6046 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6048 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6051 fputc ('\n', asm_out_file);
6052 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
6053 fputc ('\n', asm_out_file);
6057 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6059 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
6060 fputc ('\n', asm_out_file);
6061 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6062 fputc ('\n', asm_out_file);
6063 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6064 fputc ('\n', asm_out_file);
6065 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
6066 fputc ('\n', asm_out_file);
6069 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6071 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
6073 fputc ('\n', asm_out_file);
6075 fputc ('\n', asm_out_file);
6076 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6077 fputc ('\n', asm_out_file);
6082 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
6084 register dw_separate_line_info_ref line_info
6085 = &separate_line_info_table[lt_index];
6088 /* Don't emit anything for redundant notes. */
6089 if (line_info->dw_line_num == current_line
6090 && line_info->dw_file_num == current_file
6091 && line_info->function == function)
6095 /* Emit debug info for the address of the current line. If this is
6096 a new function, or the first line of a function, then we need
6097 to handle it differently. */
6098 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
6100 if (function != line_info->function)
6102 function = line_info->function;
6104 /* Set the address register to the first line in the function */
6105 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6107 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6110 fputc ('\n', asm_out_file);
6111 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6112 fputc ('\n', asm_out_file);
6113 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6114 fputc ('\n', asm_out_file);
6115 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6116 fputc ('\n', asm_out_file);
6120 /* ??? See the DW_LNS_advance_pc comment above. */
6123 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6125 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6128 fputc ('\n', asm_out_file);
6129 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6131 fputc ('\n', asm_out_file);
6135 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6137 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6139 fputc ('\n', asm_out_file);
6140 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6141 fputc ('\n', asm_out_file);
6142 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6143 fputc ('\n', asm_out_file);
6144 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6145 fputc ('\n', asm_out_file);
6148 strcpy (prev_line_label, line_label);
6150 /* Emit debug info for the source file of the current line, if
6151 different from the previous line. */
6152 if (line_info->dw_file_num != current_file)
6154 current_file = line_info->dw_file_num;
6155 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
6157 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
6159 fputc ('\n', asm_out_file);
6160 output_uleb128 (current_file);
6162 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
6164 fputc ('\n', asm_out_file);
6167 /* Emit debug info for the current line number, choosing the encoding
6168 that uses the least amount of space. */
6169 if (line_info->dw_line_num != current_line)
6171 line_offset = line_info->dw_line_num - current_line;
6172 line_delta = line_offset - DWARF_LINE_BASE;
6173 current_line = line_info->dw_line_num;
6174 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6176 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6177 DWARF_LINE_OPCODE_BASE + line_delta);
6179 fprintf (asm_out_file,
6180 "\t%s line %ld", ASM_COMMENT_START, current_line);
6182 fputc ('\n', asm_out_file);
6186 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6188 fprintf (asm_out_file, "\t%s advance to line %ld",
6189 ASM_COMMENT_START, current_line);
6191 fputc ('\n', asm_out_file);
6192 output_sleb128 (line_offset);
6193 fputc ('\n', asm_out_file);
6194 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6196 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6197 fputc ('\n', asm_out_file);
6202 /* We still need to start a new row, so output a copy insn. */
6203 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6205 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6206 fputc ('\n', asm_out_file);
6214 /* If we're done with a function, end its sequence. */
6215 if (lt_index == separate_line_info_table_in_use
6216 || separate_line_info_table[lt_index].function != function)
6221 /* Emit debug info for the address of the end of the function. */
6222 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6225 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6227 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6230 fputc ('\n', asm_out_file);
6231 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6233 fputc ('\n', asm_out_file);
6237 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6239 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6241 fputc ('\n', asm_out_file);
6242 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6243 fputc ('\n', asm_out_file);
6244 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6245 fputc ('\n', asm_out_file);
6246 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6247 fputc ('\n', asm_out_file);
6250 /* Output the marker for the end of this sequence. */
6251 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6253 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6256 fputc ('\n', asm_out_file);
6258 fputc ('\n', asm_out_file);
6259 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6260 fputc ('\n', asm_out_file);
6264 /* Output the marker for the end of the line number info. */
6265 ASM_OUTPUT_LABEL (asm_out_file, ".LTEND");
6268 /* Given a pointer to a tree node for some base type, return a pointer to
6269 a DIE that describes the given type.
6271 This routine must only be called for GCC type nodes that correspond to
6272 Dwarf base (fundamental) types. */
6275 base_type_die (type)
6278 register dw_die_ref base_type_result;
6279 register const char *type_name;
6280 register enum dwarf_type encoding;
6281 register tree name = TYPE_NAME (type);
6283 if (TREE_CODE (type) == ERROR_MARK
6284 || TREE_CODE (type) == VOID_TYPE)
6289 if (TREE_CODE (name) == TYPE_DECL)
6290 name = DECL_NAME (name);
6292 type_name = IDENTIFIER_POINTER (name);
6295 type_name = "__unknown__";
6297 switch (TREE_CODE (type))
6300 /* Carefully distinguish the C character types, without messing
6301 up if the language is not C. Note that we check only for the names
6302 that contain spaces; other names might occur by coincidence in other
6304 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6305 && (type == char_type_node
6306 || ! strcmp (type_name, "signed char")
6307 || ! strcmp (type_name, "unsigned char"))))
6309 if (TREE_UNSIGNED (type))
6310 encoding = DW_ATE_unsigned;
6312 encoding = DW_ATE_signed;
6315 /* else fall through */
6318 /* GNU Pascal/Ada CHAR type. Not used in C. */
6319 if (TREE_UNSIGNED (type))
6320 encoding = DW_ATE_unsigned_char;
6322 encoding = DW_ATE_signed_char;
6326 encoding = DW_ATE_float;
6329 /* Dwarf2 doesn't know anything about complex ints, so use
6330 a user defined type for it. */
6332 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
6333 encoding = DW_ATE_complex_float;
6335 encoding = DW_ATE_lo_user;
6339 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6340 encoding = DW_ATE_boolean;
6344 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6347 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6348 if (demangle_name_func)
6349 type_name = (*demangle_name_func) (type_name);
6351 add_AT_string (base_type_result, DW_AT_name, type_name);
6352 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6353 int_size_in_bytes (type));
6354 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6356 return base_type_result;
6359 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6360 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6361 a given type is generally the same as the given type, except that if the
6362 given type is a pointer or reference type, then the root type of the given
6363 type is the root type of the "basis" type for the pointer or reference
6364 type. (This definition of the "root" type is recursive.) Also, the root
6365 type of a `const' qualified type or a `volatile' qualified type is the
6366 root type of the given type without the qualifiers. */
6372 if (TREE_CODE (type) == ERROR_MARK)
6373 return error_mark_node;
6375 switch (TREE_CODE (type))
6378 return error_mark_node;
6381 case REFERENCE_TYPE:
6382 return type_main_variant (root_type (TREE_TYPE (type)));
6385 return type_main_variant (type);
6389 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6390 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6396 switch (TREE_CODE (type))
6411 case QUAL_UNION_TYPE:
6416 case REFERENCE_TYPE:
6429 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6430 entry that chains various modifiers in front of the given type. */
6433 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6435 register int is_const_type;
6436 register int is_volatile_type;
6437 register dw_die_ref context_die;
6439 register enum tree_code code = TREE_CODE (type);
6440 register dw_die_ref mod_type_die = NULL;
6441 register dw_die_ref sub_die = NULL;
6442 register tree item_type = NULL;
6444 if (code != ERROR_MARK)
6446 type = build_type_variant (type, is_const_type, is_volatile_type);
6448 mod_type_die = lookup_type_die (type);
6450 return mod_type_die;
6452 /* Handle C typedef types. */
6453 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6454 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6456 tree dtype = TREE_TYPE (TYPE_NAME (type));
6459 /* For a named type, use the typedef. */
6460 gen_type_die (type, context_die);
6461 mod_type_die = lookup_type_die (type);
6464 else if (is_const_type < TYPE_READONLY (dtype)
6465 || is_volatile_type < TYPE_VOLATILE (dtype))
6466 /* cv-unqualified version of named type. Just use the unnamed
6467 type to which it refers. */
6469 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6470 is_const_type, is_volatile_type,
6472 /* Else cv-qualified version of named type; fall through. */
6477 else if (is_const_type)
6479 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6480 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6482 else if (is_volatile_type)
6484 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6485 sub_die = modified_type_die (type, 0, 0, context_die);
6487 else if (code == POINTER_TYPE)
6489 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6490 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6492 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6494 item_type = TREE_TYPE (type);
6496 else if (code == REFERENCE_TYPE)
6498 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6499 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6501 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6503 item_type = TREE_TYPE (type);
6505 else if (is_base_type (type))
6506 mod_type_die = base_type_die (type);
6509 gen_type_die (type, context_die);
6511 /* We have to get the type_main_variant here (and pass that to the
6512 `lookup_type_die' routine) because the ..._TYPE node we have
6513 might simply be a *copy* of some original type node (where the
6514 copy was created to help us keep track of typedef names) and
6515 that copy might have a different TYPE_UID from the original
6517 mod_type_die = lookup_type_die (type_main_variant (type));
6518 if (mod_type_die == NULL)
6523 equate_type_number_to_die (type, mod_type_die);
6525 /* We must do this after the equate_type_number_to_die call, in case
6526 this is a recursive type. This ensures that the modified_type_die
6527 recursion will terminate even if the type is recursive. Recursive
6528 types are possible in Ada. */
6529 sub_die = modified_type_die (item_type,
6530 TYPE_READONLY (item_type),
6531 TYPE_VOLATILE (item_type),
6534 if (sub_die != NULL)
6535 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6537 return mod_type_die;
6540 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6541 an enumerated type. */
6547 return TREE_CODE (type) == ENUMERAL_TYPE;
6550 /* Return the register number described by a given RTL node. */
6556 register unsigned regno = REGNO (rtl);
6558 if (regno >= FIRST_PSEUDO_REGISTER)
6560 warning ("internal regno botch: regno = %d\n", regno);
6564 regno = DBX_REGISTER_NUMBER (regno);
6568 /* Return a location descriptor that designates a machine register. */
6570 static dw_loc_descr_ref
6571 reg_loc_descriptor (rtl)
6574 register dw_loc_descr_ref loc_result = NULL;
6575 register unsigned reg = reg_number (rtl);
6578 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6580 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6585 /* Return a location descriptor that designates a base+offset location. */
6587 static dw_loc_descr_ref
6588 based_loc_descr (reg, offset)
6592 register dw_loc_descr_ref loc_result;
6593 /* For the "frame base", we use the frame pointer or stack pointer
6594 registers, since the RTL for local variables is relative to one of
6596 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6597 ? HARD_FRAME_POINTER_REGNUM
6598 : STACK_POINTER_REGNUM);
6601 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6603 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6605 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6610 /* Return true if this RTL expression describes a base+offset calculation. */
6616 return (GET_CODE (rtl) == PLUS
6617 && ((GET_CODE (XEXP (rtl, 0)) == REG
6618 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6621 /* The following routine converts the RTL for a variable or parameter
6622 (resident in memory) into an equivalent Dwarf representation of a
6623 mechanism for getting the address of that same variable onto the top of a
6624 hypothetical "address evaluation" stack.
6626 When creating memory location descriptors, we are effectively transforming
6627 the RTL for a memory-resident object into its Dwarf postfix expression
6628 equivalent. This routine recursively descends an RTL tree, turning
6629 it into Dwarf postfix code as it goes.
6631 MODE is the mode of the memory reference, needed to handle some
6632 autoincrement addressing modes. */
6634 static dw_loc_descr_ref
6635 mem_loc_descriptor (rtl, mode)
6637 enum machine_mode mode;
6639 dw_loc_descr_ref mem_loc_result = NULL;
6640 /* Note that for a dynamically sized array, the location we will generate a
6641 description of here will be the lowest numbered location which is
6642 actually within the array. That's *not* necessarily the same as the
6643 zeroth element of the array. */
6645 #ifdef ASM_SIMPLIFY_DWARF_ADDR
6646 rtl = ASM_SIMPLIFY_DWARF_ADDR (rtl);
6649 switch (GET_CODE (rtl))
6653 /* POST_INC and POST_DEC can be handled just like a SUBREG. So we
6654 just fall into the SUBREG code. */
6656 /* ... fall through ... */
6659 /* The case of a subreg may arise when we have a local (register)
6660 variable or a formal (register) parameter which doesn't quite fill
6661 up an entire register. For now, just assume that it is
6662 legitimate to make the Dwarf info refer to the whole register which
6663 contains the given subreg. */
6664 rtl = XEXP (rtl, 0);
6666 /* ... fall through ... */
6669 /* Whenever a register number forms a part of the description of the
6670 method for calculating the (dynamic) address of a memory resident
6671 object, DWARF rules require the register number be referred to as
6672 a "base register". This distinction is not based in any way upon
6673 what category of register the hardware believes the given register
6674 belongs to. This is strictly DWARF terminology we're dealing with
6675 here. Note that in cases where the location of a memory-resident
6676 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6677 OP_CONST (0)) the actual DWARF location descriptor that we generate
6678 may just be OP_BASEREG (basereg). This may look deceptively like
6679 the object in question was allocated to a register (rather than in
6680 memory) so DWARF consumers need to be aware of the subtle
6681 distinction between OP_REG and OP_BASEREG. */
6682 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6686 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode);
6687 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6691 /* Some ports can transform a symbol ref into a label ref, because
6692 the symbol ref is too far away and has to be dumped into a constant
6696 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6697 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6698 mem_loc_result->dw_loc_oprnd1.v.val_addr = save_rtx (rtl);
6703 /* Turn these into a PLUS expression and fall into the PLUS code
6705 rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0),
6706 GEN_INT (GET_CODE (rtl) == PRE_INC
6707 ? GET_MODE_UNIT_SIZE (mode)
6708 : - GET_MODE_UNIT_SIZE (mode)));
6710 /* ... fall through ... */
6713 if (is_based_loc (rtl))
6714 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6715 INTVAL (XEXP (rtl, 1)));
6718 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0),
6720 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1),
6722 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6727 /* If a pseudo-reg is optimized away, it is possible for it to
6728 be replaced with a MEM containing a multiply. */
6729 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0), mode));
6730 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1), mode));
6731 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6735 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6742 return mem_loc_result;
6745 /* Return a descriptor that describes the concatenation of two locations.
6746 This is typically a complex variable. */
6748 static dw_loc_descr_ref
6749 concat_loc_descriptor (x0, x1)
6750 register rtx x0, x1;
6752 dw_loc_descr_ref cc_loc_result = NULL;
6754 if (!is_pseudo_reg (x0)
6755 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6756 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6757 add_loc_descr (&cc_loc_result,
6758 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6760 if (!is_pseudo_reg (x1)
6761 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6762 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6763 add_loc_descr (&cc_loc_result,
6764 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6766 return cc_loc_result;
6769 /* Output a proper Dwarf location descriptor for a variable or parameter
6770 which is either allocated in a register or in a memory location. For a
6771 register, we just generate an OP_REG and the register number. For a
6772 memory location we provide a Dwarf postfix expression describing how to
6773 generate the (dynamic) address of the object onto the address stack. */
6775 static dw_loc_descr_ref
6776 loc_descriptor (rtl)
6779 dw_loc_descr_ref loc_result = NULL;
6780 switch (GET_CODE (rtl))
6783 /* The case of a subreg may arise when we have a local (register)
6784 variable or a formal (register) parameter which doesn't quite fill
6785 up an entire register. For now, just assume that it is
6786 legitimate to make the Dwarf info refer to the whole register which
6787 contains the given subreg. */
6788 rtl = XEXP (rtl, 0);
6790 /* ... fall through ... */
6793 loc_result = reg_loc_descriptor (rtl);
6797 loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl));
6801 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6811 /* Given a value, round it up to the lowest multiple of `boundary'
6812 which is not less than the value itself. */
6814 static inline HOST_WIDE_INT
6815 ceiling (value, boundary)
6816 HOST_WIDE_INT value;
6817 unsigned int boundary;
6819 return (((value + boundary - 1) / boundary) * boundary);
6822 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6823 pointer to the declared type for the relevant field variable, or return
6824 `integer_type_node' if the given node turns out to be an
6833 if (TREE_CODE (decl) == ERROR_MARK)
6834 return integer_type_node;
6836 type = DECL_BIT_FIELD_TYPE (decl);
6837 if (type == NULL_TREE)
6838 type = TREE_TYPE (decl);
6843 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6844 node, return the alignment in bits for the type, or else return
6845 BITS_PER_WORD if the node actually turns out to be an
6848 static inline unsigned
6849 simple_type_align_in_bits (type)
6852 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6855 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6856 node, return the size in bits for the type if it is a constant, or else
6857 return the alignment for the type if the type's size is not constant, or
6858 else return BITS_PER_WORD if the type actually turns out to be an
6861 static inline unsigned HOST_WIDE_INT
6862 simple_type_size_in_bits (type)
6865 if (TREE_CODE (type) == ERROR_MARK)
6866 return BITS_PER_WORD;
6869 register tree type_size_tree = TYPE_SIZE (type);
6871 if (! host_integerp (type_size_tree, 1))
6872 return TYPE_ALIGN (type);
6874 return tree_low_cst (type_size_tree, 1);
6878 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6879 return the byte offset of the lowest addressed byte of the "containing
6880 object" for the given FIELD_DECL, or return 0 if we are unable to
6881 determine what that offset is, either because the argument turns out to
6882 be a pointer to an ERROR_MARK node, or because the offset is actually
6883 variable. (We can't handle the latter case just yet). */
6885 static HOST_WIDE_INT
6886 field_byte_offset (decl)
6889 unsigned int type_align_in_bytes;
6890 unsigned int type_align_in_bits;
6891 unsigned HOST_WIDE_INT type_size_in_bits;
6892 HOST_WIDE_INT object_offset_in_align_units;
6893 HOST_WIDE_INT object_offset_in_bits;
6894 HOST_WIDE_INT object_offset_in_bytes;
6896 tree field_size_tree;
6897 HOST_WIDE_INT bitpos_int;
6898 HOST_WIDE_INT deepest_bitpos;
6899 unsigned HOST_WIDE_INT field_size_in_bits;
6901 if (TREE_CODE (decl) == ERROR_MARK)
6904 if (TREE_CODE (decl) != FIELD_DECL)
6907 type = field_type (decl);
6908 field_size_tree = DECL_SIZE (decl);
6910 /* If there was an error, the size could be zero. */
6911 if (! field_size_tree)
6919 /* We cannot yet cope with fields whose positions are variable, so
6920 for now, when we see such things, we simply return 0. Someday, we may
6921 be able to handle such cases, but it will be damn difficult. */
6922 if (! host_integerp (bit_position (decl), 0))
6925 bitpos_int = int_bit_position (decl);
6927 /* If we don't know the size of the field, pretend it's a full word. */
6928 if (host_integerp (field_size_tree, 1))
6929 field_size_in_bits = tree_low_cst (field_size_tree, 1);
6931 field_size_in_bits = BITS_PER_WORD;
6933 type_size_in_bits = simple_type_size_in_bits (type);
6934 type_align_in_bits = simple_type_align_in_bits (type);
6935 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6937 /* Note that the GCC front-end doesn't make any attempt to keep track of
6938 the starting bit offset (relative to the start of the containing
6939 structure type) of the hypothetical "containing object" for a bit-
6940 field. Thus, when computing the byte offset value for the start of the
6941 "containing object" of a bit-field, we must deduce this information on
6942 our own. This can be rather tricky to do in some cases. For example,
6943 handling the following structure type definition when compiling for an
6944 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6947 struct S { int field1; long long field2:31; };
6949 Fortunately, there is a simple rule-of-thumb which can be
6950 used in such cases. When compiling for an i386/i486, GCC will allocate
6951 8 bytes for the structure shown above. It decides to do this based upon
6952 one simple rule for bit-field allocation. Quite simply, GCC allocates
6953 each "containing object" for each bit-field at the first (i.e. lowest
6954 addressed) legitimate alignment boundary (based upon the required
6955 minimum alignment for the declared type of the field) which it can
6956 possibly use, subject to the condition that there is still enough
6957 available space remaining in the containing object (when allocated at
6958 the selected point) to fully accommodate all of the bits of the
6959 bit-field itself. This simple rule makes it obvious why GCC allocates
6960 8 bytes for each object of the structure type shown above. When looking
6961 for a place to allocate the "containing object" for `field2', the
6962 compiler simply tries to allocate a 64-bit "containing object" at each
6963 successive 32-bit boundary (starting at zero) until it finds a place to
6964 allocate that 64- bit field such that at least 31 contiguous (and
6965 previously unallocated) bits remain within that selected 64 bit field.
6966 (As it turns out, for the example above, the compiler finds that it is
6967 OK to allocate the "containing object" 64-bit field at bit-offset zero
6968 within the structure type.) Here we attempt to work backwards from the
6969 limited set of facts we're given, and we try to deduce from those facts,
6970 where GCC must have believed that the containing object started (within
6971 the structure type). The value we deduce is then used (by the callers of
6972 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6973 for fields (both bit-fields and, in the case of DW_AT_location, regular
6976 /* Figure out the bit-distance from the start of the structure to the
6977 "deepest" bit of the bit-field. */
6978 deepest_bitpos = bitpos_int + field_size_in_bits;
6980 /* This is the tricky part. Use some fancy footwork to deduce where the
6981 lowest addressed bit of the containing object must be. */
6982 object_offset_in_bits
6983 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6985 /* Compute the offset of the containing object in "alignment units". */
6986 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6988 /* Compute the offset of the containing object in bytes. */
6989 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6991 return object_offset_in_bytes;
6994 /* The following routines define various Dwarf attributes and any data
6995 associated with them. */
6997 /* Add a location description attribute value to a DIE.
6999 This emits location attributes suitable for whole variables and
7000 whole parameters. Note that the location attributes for struct fields are
7001 generated by the routine `data_member_location_attribute' below. */
7004 add_AT_location_description (die, attr_kind, rtl)
7006 enum dwarf_attribute attr_kind;
7009 /* Handle a special case. If we are about to output a location descriptor
7010 for a variable or parameter which has been optimized out of existence,
7011 don't do that. A variable which has been optimized out
7012 of existence will have a DECL_RTL value which denotes a pseudo-reg.
7013 Currently, in some rare cases, variables can have DECL_RTL values which
7014 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
7015 elsewhere in the compiler. We treat such cases as if the variable(s) in
7016 question had been optimized out of existence. */
7018 if (is_pseudo_reg (rtl)
7019 || (GET_CODE (rtl) == MEM
7020 && is_pseudo_reg (XEXP (rtl, 0)))
7021 /* This can happen for a PARM_DECL with a DECL_INCOMING_RTL which
7022 references the internal argument pointer (a pseudo) in a function
7023 where all references to the internal argument pointer were
7024 eliminated via the optimizers. */
7025 || (GET_CODE (rtl) == MEM
7026 && GET_CODE (XEXP (rtl, 0)) == PLUS
7027 && is_pseudo_reg (XEXP (XEXP (rtl, 0), 0)))
7028 || (GET_CODE (rtl) == CONCAT
7029 && is_pseudo_reg (XEXP (rtl, 0))
7030 && is_pseudo_reg (XEXP (rtl, 1))))
7033 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
7036 /* Attach the specialized form of location attribute used for data
7037 members of struct and union types. In the special case of a
7038 FIELD_DECL node which represents a bit-field, the "offset" part
7039 of this special location descriptor must indicate the distance
7040 in bytes from the lowest-addressed byte of the containing struct
7041 or union type to the lowest-addressed byte of the "containing
7042 object" for the bit-field. (See the `field_byte_offset' function
7043 above).. For any given bit-field, the "containing object" is a
7044 hypothetical object (of some integral or enum type) within which
7045 the given bit-field lives. The type of this hypothetical
7046 "containing object" is always the same as the declared type of
7047 the individual bit-field itself (for GCC anyway... the DWARF
7048 spec doesn't actually mandate this). Note that it is the size
7049 (in bytes) of the hypothetical "containing object" which will
7050 be given in the DW_AT_byte_size attribute for this bit-field.
7051 (See the `byte_size_attribute' function below.) It is also used
7052 when calculating the value of the DW_AT_bit_offset attribute.
7053 (See the `bit_offset_attribute' function below). */
7056 add_data_member_location_attribute (die, decl)
7057 register dw_die_ref die;
7060 register unsigned long offset;
7061 register dw_loc_descr_ref loc_descr;
7062 register enum dwarf_location_atom op;
7064 if (TREE_CODE (decl) == TREE_VEC)
7065 offset = tree_low_cst (BINFO_OFFSET (decl), 0);
7067 offset = field_byte_offset (decl);
7069 /* The DWARF2 standard says that we should assume that the structure address
7070 is already on the stack, so we can specify a structure field address
7071 by using DW_OP_plus_uconst. */
7073 #ifdef MIPS_DEBUGGING_INFO
7074 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
7075 correctly. It works only if we leave the offset on the stack. */
7078 op = DW_OP_plus_uconst;
7081 loc_descr = new_loc_descr (op, offset, 0);
7082 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
7085 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
7086 does not have a "location" either in memory or in a register. These
7087 things can arise in GNU C when a constant is passed as an actual parameter
7088 to an inlined function. They can also arise in C++ where declared
7089 constants do not necessarily get memory "homes". */
7092 add_const_value_attribute (die, rtl)
7093 register dw_die_ref die;
7096 switch (GET_CODE (rtl))
7099 /* Note that a CONST_INT rtx could represent either an integer or a
7100 floating-point constant. A CONST_INT is used whenever the constant
7101 will fit into a single word. In all such cases, the original mode
7102 of the constant value is wiped out, and the CONST_INT rtx is
7103 assigned VOIDmode. */
7104 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
7108 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
7109 floating-point constant. A CONST_DOUBLE is used whenever the
7110 constant requires more than one word in order to be adequately
7111 represented. We output CONST_DOUBLEs as blocks. */
7113 register enum machine_mode mode = GET_MODE (rtl);
7115 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
7117 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
7121 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
7125 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
7129 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
7134 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
7141 add_AT_float (die, DW_AT_const_value, length, array);
7144 add_AT_long_long (die, DW_AT_const_value,
7145 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
7150 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
7156 add_AT_addr (die, DW_AT_const_value, save_rtx (rtl));
7160 /* In cases where an inlined instance of an inline function is passed
7161 the address of an `auto' variable (which is local to the caller) we
7162 can get a situation where the DECL_RTL of the artificial local
7163 variable (for the inlining) which acts as a stand-in for the
7164 corresponding formal parameter (of the inline function) will look
7165 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
7166 exactly a compile-time constant expression, but it isn't the address
7167 of the (artificial) local variable either. Rather, it represents the
7168 *value* which the artificial local variable always has during its
7169 lifetime. We currently have no way to represent such quasi-constant
7170 values in Dwarf, so for now we just punt and generate nothing. */
7174 /* No other kinds of rtx should be possible here. */
7180 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
7181 data attribute for a variable or a parameter. We generate the
7182 DW_AT_const_value attribute only in those cases where the given variable
7183 or parameter does not have a true "location" either in memory or in a
7184 register. This can happen (for example) when a constant is passed as an
7185 actual argument in a call to an inline function. (It's possible that
7186 these things can crop up in other ways also.) Note that one type of
7187 constant value which can be passed into an inlined function is a constant
7188 pointer. This can happen for example if an actual argument in an inlined
7189 function call evaluates to a compile-time constant address. */
7192 add_location_or_const_value_attribute (die, decl)
7193 register dw_die_ref die;
7197 register tree declared_type;
7198 register tree passed_type;
7200 if (TREE_CODE (decl) == ERROR_MARK)
7203 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
7206 /* Here we have to decide where we are going to say the parameter "lives"
7207 (as far as the debugger is concerned). We only have a couple of
7208 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
7210 DECL_RTL normally indicates where the parameter lives during most of the
7211 activation of the function. If optimization is enabled however, this
7212 could be either NULL or else a pseudo-reg. Both of those cases indicate
7213 that the parameter doesn't really live anywhere (as far as the code
7214 generation parts of GCC are concerned) during most of the function's
7215 activation. That will happen (for example) if the parameter is never
7216 referenced within the function.
7218 We could just generate a location descriptor here for all non-NULL
7219 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
7220 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
7221 where DECL_RTL is NULL or is a pseudo-reg.
7223 Note however that we can only get away with using DECL_INCOMING_RTL as
7224 a backup substitute for DECL_RTL in certain limited cases. In cases
7225 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7226 we can be sure that the parameter was passed using the same type as it is
7227 declared to have within the function, and that its DECL_INCOMING_RTL
7228 points us to a place where a value of that type is passed.
7230 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7231 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7232 because in these cases DECL_INCOMING_RTL points us to a value of some
7233 type which is *different* from the type of the parameter itself. Thus,
7234 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7235 such cases, the debugger would end up (for example) trying to fetch a
7236 `float' from a place which actually contains the first part of a
7237 `double'. That would lead to really incorrect and confusing
7238 output at debug-time.
7240 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7241 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7242 are a couple of exceptions however. On little-endian machines we can
7243 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7244 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7245 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7246 when (on a little-endian machine) a non-prototyped function has a
7247 parameter declared to be of type `short' or `char'. In such cases,
7248 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7249 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7250 passed `int' value. If the debugger then uses that address to fetch
7251 a `short' or a `char' (on a little-endian machine) the result will be
7252 the correct data, so we allow for such exceptional cases below.
7254 Note that our goal here is to describe the place where the given formal
7255 parameter lives during most of the function's activation (i.e. between
7256 the end of the prologue and the start of the epilogue). We'll do that
7257 as best as we can. Note however that if the given formal parameter is
7258 modified sometime during the execution of the function, then a stack
7259 backtrace (at debug-time) will show the function as having been
7260 called with the *new* value rather than the value which was
7261 originally passed in. This happens rarely enough that it is not
7262 a major problem, but it *is* a problem, and I'd like to fix it.
7264 A future version of dwarf2out.c may generate two additional
7265 attributes for any given DW_TAG_formal_parameter DIE which will
7266 describe the "passed type" and the "passed location" for the
7267 given formal parameter in addition to the attributes we now
7268 generate to indicate the "declared type" and the "active
7269 location" for each parameter. This additional set of attributes
7270 could be used by debuggers for stack backtraces. Separately, note
7271 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7272 NULL also. This happens (for example) for inlined-instances of
7273 inline function formal parameters which are never referenced.
7274 This really shouldn't be happening. All PARM_DECL nodes should
7275 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7276 doesn't currently generate these values for inlined instances of
7277 inline function parameters, so when we see such cases, we are
7278 just out-of-luck for the time being (until integrate.c
7281 /* Use DECL_RTL as the "location" unless we find something better. */
7282 rtl = DECL_RTL (decl);
7284 if (TREE_CODE (decl) == PARM_DECL)
7286 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7288 declared_type = type_main_variant (TREE_TYPE (decl));
7289 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7291 /* This decl represents a formal parameter which was optimized out.
7292 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7293 all* cases where (rtl == NULL_RTX) just below. */
7294 if (declared_type == passed_type)
7295 rtl = DECL_INCOMING_RTL (decl);
7296 else if (! BYTES_BIG_ENDIAN
7297 && TREE_CODE (declared_type) == INTEGER_TYPE
7298 && (GET_MODE_SIZE (TYPE_MODE (declared_type))
7299 <= GET_MODE_SIZE (TYPE_MODE (passed_type))))
7300 rtl = DECL_INCOMING_RTL (decl);
7303 /* If the parm was passed in registers, but lives on the stack, then
7304 make a big endian correction if the mode of the type of the
7305 parameter is not the same as the mode of the rtl. */
7306 /* ??? This is the same series of checks that are made in dbxout.c before
7307 we reach the big endian correction code there. It isn't clear if all
7308 of these checks are necessary here, but keeping them all is the safe
7310 else if (GET_CODE (rtl) == MEM
7311 && XEXP (rtl, 0) != const0_rtx
7312 && ! CONSTANT_P (XEXP (rtl, 0))
7313 /* Not passed in memory. */
7314 && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM
7315 /* Not passed by invisible reference. */
7316 && (GET_CODE (XEXP (rtl, 0)) != REG
7317 || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM
7318 || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM
7319 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
7320 || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM
7323 /* Big endian correction check. */
7325 && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl)
7326 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))
7329 int offset = (UNITS_PER_WORD
7330 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))));
7331 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
7332 plus_constant (XEXP (rtl, 0), offset));
7336 if (rtl == NULL_RTX)
7339 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7340 #ifdef LEAF_REG_REMAP
7341 if (current_function_uses_only_leaf_regs)
7342 leaf_renumber_regs_insn (rtl);
7345 switch (GET_CODE (rtl))
7348 /* The address of a variable that was optimized away; don't emit
7359 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7360 add_const_value_attribute (die, rtl);
7367 add_AT_location_description (die, DW_AT_location, rtl);
7375 /* Generate an DW_AT_name attribute given some string value to be included as
7376 the value of the attribute. */
7379 add_name_attribute (die, name_string)
7380 register dw_die_ref die;
7381 register const char *name_string;
7383 if (name_string != NULL && *name_string != 0)
7385 if (demangle_name_func)
7386 name_string = (*demangle_name_func) (name_string);
7388 add_AT_string (die, DW_AT_name, name_string);
7392 /* Given a tree node describing an array bound (either lower or upper) output
7393 a representation for that bound. */
7396 add_bound_info (subrange_die, bound_attr, bound)
7397 register dw_die_ref subrange_die;
7398 register enum dwarf_attribute bound_attr;
7399 register tree bound;
7401 /* If this is an Ada unconstrained array type, then don't emit any debug
7402 info because the array bounds are unknown. They are parameterized when
7403 the type is instantiated. */
7404 if (contains_placeholder_p (bound))
7407 switch (TREE_CODE (bound))
7412 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7414 if (! host_integerp (bound, 0)
7415 || (bound_attr == DW_AT_lower_bound
7416 && ((is_c_family () && integer_zerop (bound))
7417 || (is_fortran () && integer_onep (bound)))))
7418 /* use the default */
7421 add_AT_unsigned (subrange_die, bound_attr, tree_low_cst (bound, 0));
7426 case NON_LVALUE_EXPR:
7427 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7431 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7432 access the upper bound values may be bogus. If they refer to a
7433 register, they may only describe how to get at these values at the
7434 points in the generated code right after they have just been
7435 computed. Worse yet, in the typical case, the upper bound values
7436 will not even *be* computed in the optimized code (though the
7437 number of elements will), so these SAVE_EXPRs are entirely
7438 bogus. In order to compensate for this fact, we check here to see
7439 if optimization is enabled, and if so, we don't add an attribute
7440 for the (unknown and unknowable) upper bound. This should not
7441 cause too much trouble for existing (stupid?) debuggers because
7442 they have to deal with empty upper bounds location descriptions
7443 anyway in order to be able to deal with incomplete array types.
7444 Of course an intelligent debugger (GDB?) should be able to
7445 comprehend that a missing upper bound specification in a array
7446 type used for a storage class `auto' local array variable
7447 indicates that the upper bound is both unknown (at compile- time)
7448 and unknowable (at run-time) due to optimization.
7450 We assume that a MEM rtx is safe because gcc wouldn't put the
7451 value there unless it was going to be used repeatedly in the
7452 function, i.e. for cleanups. */
7453 if (! optimize || (SAVE_EXPR_RTL (bound)
7454 && GET_CODE (SAVE_EXPR_RTL (bound)) == MEM))
7456 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7457 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7458 register rtx loc = SAVE_EXPR_RTL (bound);
7460 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7461 it references an outer function's frame. */
7463 if (GET_CODE (loc) == MEM)
7465 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7467 if (XEXP (loc, 0) != new_addr)
7468 loc = gen_rtx_MEM (GET_MODE (loc), new_addr);
7471 add_AT_flag (decl_die, DW_AT_artificial, 1);
7472 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7473 add_AT_location_description (decl_die, DW_AT_location, loc);
7474 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7477 /* Else leave out the attribute. */
7483 /* ??? These types of bounds can be created by the Ada front end,
7484 and it isn't clear how to emit debug info for them. */
7492 /* Note that the block of subscript information for an array type also
7493 includes information about the element type of type given array type. */
7496 add_subscript_info (type_die, type)
7497 register dw_die_ref type_die;
7500 #ifndef MIPS_DEBUGGING_INFO
7501 register unsigned dimension_number;
7503 register tree lower, upper;
7504 register dw_die_ref subrange_die;
7506 /* The GNU compilers represent multidimensional array types as sequences of
7507 one dimensional array types whose element types are themselves array
7508 types. Here we squish that down, so that each multidimensional array
7509 type gets only one array_type DIE in the Dwarf debugging info. The draft
7510 Dwarf specification say that we are allowed to do this kind of
7511 compression in C (because there is no difference between an array or
7512 arrays and a multidimensional array in C) but for other source languages
7513 (e.g. Ada) we probably shouldn't do this. */
7515 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7516 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7517 We work around this by disabling this feature. See also
7518 gen_array_type_die. */
7519 #ifndef MIPS_DEBUGGING_INFO
7520 for (dimension_number = 0;
7521 TREE_CODE (type) == ARRAY_TYPE;
7522 type = TREE_TYPE (type), dimension_number++)
7525 register tree domain = TYPE_DOMAIN (type);
7527 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7528 and (in GNU C only) variable bounds. Handle all three forms
7530 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7533 /* We have an array type with specified bounds. */
7534 lower = TYPE_MIN_VALUE (domain);
7535 upper = TYPE_MAX_VALUE (domain);
7537 /* define the index type. */
7538 if (TREE_TYPE (domain))
7540 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7541 TREE_TYPE field. We can't emit debug info for this
7542 because it is an unnamed integral type. */
7543 if (TREE_CODE (domain) == INTEGER_TYPE
7544 && TYPE_NAME (domain) == NULL_TREE
7545 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7546 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7549 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7553 /* ??? If upper is NULL, the array has unspecified length,
7554 but it does have a lower bound. This happens with Fortran
7556 Since the debugger is definitely going to need to know N
7557 to produce useful results, go ahead and output the lower
7558 bound solo, and hope the debugger can cope. */
7560 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7562 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7565 /* We have an array type with an unspecified length. The DWARF-2
7566 spec does not say how to handle this; let's just leave out the
7571 #ifndef MIPS_DEBUGGING_INFO
7577 add_byte_size_attribute (die, tree_node)
7579 register tree tree_node;
7581 register unsigned size;
7583 switch (TREE_CODE (tree_node))
7591 case QUAL_UNION_TYPE:
7592 size = int_size_in_bytes (tree_node);
7595 /* For a data member of a struct or union, the DW_AT_byte_size is
7596 generally given as the number of bytes normally allocated for an
7597 object of the *declared* type of the member itself. This is true
7598 even for bit-fields. */
7599 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7605 /* Note that `size' might be -1 when we get to this point. If it is, that
7606 indicates that the byte size of the entity in question is variable. We
7607 have no good way of expressing this fact in Dwarf at the present time,
7608 so just let the -1 pass on through. */
7610 add_AT_unsigned (die, DW_AT_byte_size, size);
7613 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7614 which specifies the distance in bits from the highest order bit of the
7615 "containing object" for the bit-field to the highest order bit of the
7618 For any given bit-field, the "containing object" is a hypothetical
7619 object (of some integral or enum type) within which the given bit-field
7620 lives. The type of this hypothetical "containing object" is always the
7621 same as the declared type of the individual bit-field itself. The
7622 determination of the exact location of the "containing object" for a
7623 bit-field is rather complicated. It's handled by the
7624 `field_byte_offset' function (above).
7626 Note that it is the size (in bytes) of the hypothetical "containing object"
7627 which will be given in the DW_AT_byte_size attribute for this bit-field.
7628 (See `byte_size_attribute' above). */
7631 add_bit_offset_attribute (die, decl)
7632 register dw_die_ref die;
7635 HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl);
7636 tree type = DECL_BIT_FIELD_TYPE (decl);
7637 HOST_WIDE_INT bitpos_int;
7638 HOST_WIDE_INT highest_order_object_bit_offset;
7639 HOST_WIDE_INT highest_order_field_bit_offset;
7640 HOST_WIDE_INT unsigned bit_offset;
7642 /* Must be a field and a bit field. */
7644 || TREE_CODE (decl) != FIELD_DECL)
7647 /* We can't yet handle bit-fields whose offsets are variable, so if we
7648 encounter such things, just return without generating any attribute
7649 whatsoever. Likewise for variable or too large size. */
7650 if (! host_integerp (bit_position (decl), 0)
7651 || ! host_integerp (DECL_SIZE (decl), 1))
7654 bitpos_int = int_bit_position (decl);
7656 /* Note that the bit offset is always the distance (in bits) from the
7657 highest-order bit of the "containing object" to the highest-order bit of
7658 the bit-field itself. Since the "high-order end" of any object or field
7659 is different on big-endian and little-endian machines, the computation
7660 below must take account of these differences. */
7661 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7662 highest_order_field_bit_offset = bitpos_int;
7664 if (! BYTES_BIG_ENDIAN)
7666 highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0);
7667 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7671 = (! BYTES_BIG_ENDIAN
7672 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7673 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7675 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7678 /* For a FIELD_DECL node which represents a bit field, output an attribute
7679 which specifies the length in bits of the given field. */
7682 add_bit_size_attribute (die, decl)
7683 register dw_die_ref die;
7686 /* Must be a field and a bit field. */
7687 if (TREE_CODE (decl) != FIELD_DECL
7688 || ! DECL_BIT_FIELD_TYPE (decl))
7691 if (host_integerp (DECL_SIZE (decl), 1))
7692 add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1));
7695 /* If the compiled language is ANSI C, then add a 'prototyped'
7696 attribute, if arg types are given for the parameters of a function. */
7699 add_prototyped_attribute (die, func_type)
7700 register dw_die_ref die;
7701 register tree func_type;
7703 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7704 && TYPE_ARG_TYPES (func_type) != NULL)
7705 add_AT_flag (die, DW_AT_prototyped, 1);
7709 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7710 by looking in either the type declaration or object declaration
7714 add_abstract_origin_attribute (die, origin)
7715 register dw_die_ref die;
7716 register tree origin;
7718 dw_die_ref origin_die = NULL;
7720 if (TREE_CODE (origin) != FUNCTION_DECL)
7722 /* We may have gotten separated from the block for the inlined
7723 function, if we're in an exception handler or some such; make
7724 sure that the abstract function has been written out.
7726 Doing this for nested functions is wrong, however; functions are
7727 distinct units, and our context might not even be inline. */
7730 fn = TYPE_STUB_DECL (fn);
7731 fn = decl_function_context (fn);
7733 gen_abstract_function (fn);
7736 if (DECL_P (origin))
7737 origin_die = lookup_decl_die (origin);
7738 else if (TYPE_P (origin))
7739 origin_die = lookup_type_die (origin);
7741 if (origin_die == NULL)
7744 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7747 /* We do not currently support the pure_virtual attribute. */
7750 add_pure_or_virtual_attribute (die, func_decl)
7751 register dw_die_ref die;
7752 register tree func_decl;
7754 if (DECL_VINDEX (func_decl))
7756 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7758 if (host_integerp (DECL_VINDEX (func_decl), 0))
7759 add_AT_loc (die, DW_AT_vtable_elem_location,
7760 new_loc_descr (DW_OP_constu,
7761 tree_low_cst (DECL_VINDEX (func_decl), 0),
7764 /* GNU extension: Record what type this method came from originally. */
7765 if (debug_info_level > DINFO_LEVEL_TERSE)
7766 add_AT_die_ref (die, DW_AT_containing_type,
7767 lookup_type_die (DECL_CONTEXT (func_decl)));
7771 /* Add source coordinate attributes for the given decl. */
7774 add_src_coords_attributes (die, decl)
7775 register dw_die_ref die;
7778 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7780 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7781 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7784 /* Add an DW_AT_name attribute and source coordinate attribute for the
7785 given decl, but only if it actually has a name. */
7788 add_name_and_src_coords_attributes (die, decl)
7789 register dw_die_ref die;
7792 register tree decl_name;
7794 decl_name = DECL_NAME (decl);
7795 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7797 add_name_attribute (die, dwarf2_name (decl, 0));
7798 if (! DECL_ARTIFICIAL (decl))
7799 add_src_coords_attributes (die, decl);
7801 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7802 && TREE_PUBLIC (decl)
7803 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7804 add_AT_string (die, DW_AT_MIPS_linkage_name,
7805 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7809 /* Push a new declaration scope. */
7812 push_decl_scope (scope)
7815 /* Make room in the decl_scope_table, if necessary. */
7816 if (decl_scope_table_allocated == decl_scope_depth)
7818 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7820 = (tree *) xrealloc (decl_scope_table,
7821 decl_scope_table_allocated * sizeof (tree));
7824 decl_scope_table[decl_scope_depth] = scope;
7828 /* Pop a declaration scope. */
7832 if (decl_scope_depth <= 0)
7837 /* Return the DIE for the scope that immediately contains this type.
7838 Non-named types get global scope. Named types nested in other
7839 types get their containing scope if it's open, or global scope
7840 otherwise. All other types (i.e. function-local named types) get
7841 the current active scope. */
7844 scope_die_for (t, context_die)
7846 register dw_die_ref context_die;
7848 register dw_die_ref scope_die = NULL;
7849 register tree containing_scope;
7852 /* Non-types always go in the current scope. */
7856 containing_scope = TYPE_CONTEXT (t);
7858 /* Ignore namespaces for the moment. */
7859 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7860 containing_scope = NULL_TREE;
7862 /* Ignore function type "scopes" from the C frontend. They mean that
7863 a tagged type is local to a parmlist of a function declarator, but
7864 that isn't useful to DWARF. */
7865 if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE)
7866 containing_scope = NULL_TREE;
7868 if (containing_scope == NULL_TREE)
7869 scope_die = comp_unit_die;
7870 else if (TYPE_P (containing_scope))
7872 /* For types, we can just look up the appropriate DIE. But
7873 first we check to see if we're in the middle of emitting it
7874 so we know where the new DIE should go. */
7876 for (i = decl_scope_depth - 1; i >= 0; --i)
7877 if (decl_scope_table[i] == containing_scope)
7882 if (debug_info_level > DINFO_LEVEL_TERSE
7883 && !TREE_ASM_WRITTEN (containing_scope))
7886 /* If none of the current dies are suitable, we get file scope. */
7887 scope_die = comp_unit_die;
7890 scope_die = lookup_type_die (containing_scope);
7893 scope_die = context_die;
7898 /* Returns nonzero iff CONTEXT_DIE is internal to a function. */
7900 static inline int local_scope_p PARAMS ((dw_die_ref));
7902 local_scope_p (context_die)
7903 dw_die_ref context_die;
7905 for (; context_die; context_die = context_die->die_parent)
7906 if (context_die->die_tag == DW_TAG_inlined_subroutine
7907 || context_die->die_tag == DW_TAG_subprogram)
7912 /* Returns nonzero iff CONTEXT_DIE is a class. */
7914 static inline int class_scope_p PARAMS ((dw_die_ref));
7916 class_scope_p (context_die)
7917 dw_die_ref context_die;
7920 && (context_die->die_tag == DW_TAG_structure_type
7921 || context_die->die_tag == DW_TAG_union_type));
7924 /* Many forms of DIEs require a "type description" attribute. This
7925 routine locates the proper "type descriptor" die for the type given
7926 by 'type', and adds an DW_AT_type attribute below the given die. */
7929 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7930 register dw_die_ref object_die;
7932 register int decl_const;
7933 register int decl_volatile;
7934 register dw_die_ref context_die;
7936 register enum tree_code code = TREE_CODE (type);
7937 register dw_die_ref type_die = NULL;
7939 /* ??? If this type is an unnamed subrange type of an integral or
7940 floating-point type, use the inner type. This is because we have no
7941 support for unnamed types in base_type_die. This can happen if this is
7942 an Ada subrange type. Correct solution is emit a subrange type die. */
7943 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7944 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7945 type = TREE_TYPE (type), code = TREE_CODE (type);
7947 if (code == ERROR_MARK)
7950 /* Handle a special case. For functions whose return type is void, we
7951 generate *no* type attribute. (Note that no object may have type
7952 `void', so this only applies to function return types). */
7953 if (code == VOID_TYPE)
7956 type_die = modified_type_die (type,
7957 decl_const || TYPE_READONLY (type),
7958 decl_volatile || TYPE_VOLATILE (type),
7960 if (type_die != NULL)
7961 add_AT_die_ref (object_die, DW_AT_type, type_die);
7964 /* Given a tree pointer to a struct, class, union, or enum type node, return
7965 a pointer to the (string) tag name for the given type, or zero if the type
7966 was declared without a tag. */
7972 register const char *name = 0;
7974 if (TYPE_NAME (type) != 0)
7976 register tree t = 0;
7978 /* Find the IDENTIFIER_NODE for the type name. */
7979 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7980 t = TYPE_NAME (type);
7982 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7983 a TYPE_DECL node, regardless of whether or not a `typedef' was
7985 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7986 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7987 t = DECL_NAME (TYPE_NAME (type));
7989 /* Now get the name as a string, or invent one. */
7991 name = IDENTIFIER_POINTER (t);
7994 return (name == 0 || *name == '\0') ? 0 : name;
7997 /* Return the type associated with a data member, make a special check
7998 for bit field types. */
8001 member_declared_type (member)
8002 register tree member;
8004 return (DECL_BIT_FIELD_TYPE (member)
8005 ? DECL_BIT_FIELD_TYPE (member)
8006 : TREE_TYPE (member));
8009 /* Get the decl's label, as described by its RTL. This may be different
8010 from the DECL_NAME name used in the source file. */
8014 decl_start_label (decl)
8019 x = DECL_RTL (decl);
8020 if (GET_CODE (x) != MEM)
8024 if (GET_CODE (x) != SYMBOL_REF)
8027 fnname = XSTR (x, 0);
8032 /* These routines generate the internal representation of the DIE's for
8033 the compilation unit. Debugging information is collected by walking
8034 the declaration trees passed in from dwarf2out_decl(). */
8037 gen_array_type_die (type, context_die)
8039 register dw_die_ref context_die;
8041 register dw_die_ref scope_die = scope_die_for (type, context_die);
8042 register dw_die_ref array_die;
8043 register tree element_type;
8045 /* ??? The SGI dwarf reader fails for array of array of enum types unless
8046 the inner array type comes before the outer array type. Thus we must
8047 call gen_type_die before we call new_die. See below also. */
8048 #ifdef MIPS_DEBUGGING_INFO
8049 gen_type_die (TREE_TYPE (type), context_die);
8052 array_die = new_die (DW_TAG_array_type, scope_die);
8055 /* We default the array ordering. SDB will probably do
8056 the right things even if DW_AT_ordering is not present. It's not even
8057 an issue until we start to get into multidimensional arrays anyway. If
8058 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
8059 then we'll have to put the DW_AT_ordering attribute back in. (But if
8060 and when we find out that we need to put these in, we will only do so
8061 for multidimensional arrays. */
8062 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
8065 #ifdef MIPS_DEBUGGING_INFO
8066 /* The SGI compilers handle arrays of unknown bound by setting
8067 AT_declaration and not emitting any subrange DIEs. */
8068 if (! TYPE_DOMAIN (type))
8069 add_AT_unsigned (array_die, DW_AT_declaration, 1);
8072 add_subscript_info (array_die, type);
8074 add_name_attribute (array_die, type_tag (type));
8075 equate_type_number_to_die (type, array_die);
8077 /* Add representation of the type of the elements of this array type. */
8078 element_type = TREE_TYPE (type);
8080 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
8081 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
8082 We work around this by disabling this feature. See also
8083 add_subscript_info. */
8084 #ifndef MIPS_DEBUGGING_INFO
8085 while (TREE_CODE (element_type) == ARRAY_TYPE)
8086 element_type = TREE_TYPE (element_type);
8088 gen_type_die (element_type, context_die);
8091 add_type_attribute (array_die, element_type, 0, 0, context_die);
8095 gen_set_type_die (type, context_die)
8097 register dw_die_ref context_die;
8099 register dw_die_ref type_die
8100 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
8102 equate_type_number_to_die (type, type_die);
8103 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
8108 gen_entry_point_die (decl, context_die)
8110 register dw_die_ref context_die;
8112 register tree origin = decl_ultimate_origin (decl);
8113 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
8115 add_abstract_origin_attribute (decl_die, origin);
8118 add_name_and_src_coords_attributes (decl_die, decl);
8119 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
8123 if (DECL_ABSTRACT (decl))
8124 equate_decl_number_to_die (decl, decl_die);
8126 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
8130 /* Remember a type in the incomplete_types_list. */
8133 add_incomplete_type (type)
8136 if (incomplete_types == incomplete_types_allocated)
8138 incomplete_types_allocated += INCOMPLETE_TYPES_INCREMENT;
8139 incomplete_types_list
8140 = (tree *) xrealloc (incomplete_types_list,
8141 sizeof (tree) * incomplete_types_allocated);
8144 incomplete_types_list[incomplete_types++] = type;
8147 /* Walk through the list of incomplete types again, trying once more to
8148 emit full debugging info for them. */
8151 retry_incomplete_types ()
8155 while (incomplete_types)
8158 type = incomplete_types_list[incomplete_types];
8159 gen_type_die (type, comp_unit_die);
8163 /* Generate a DIE to represent an inlined instance of an enumeration type. */
8166 gen_inlined_enumeration_type_die (type, context_die)
8168 register dw_die_ref context_die;
8170 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
8172 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8173 be incomplete and such types are not marked. */
8174 add_abstract_origin_attribute (type_die, type);
8177 /* Generate a DIE to represent an inlined instance of a structure type. */
8180 gen_inlined_structure_type_die (type, context_die)
8182 register dw_die_ref context_die;
8184 register dw_die_ref type_die = new_die (DW_TAG_structure_type, context_die);
8186 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8187 be incomplete and such types are not marked. */
8188 add_abstract_origin_attribute (type_die, type);
8191 /* Generate a DIE to represent an inlined instance of a union type. */
8194 gen_inlined_union_type_die (type, context_die)
8196 register dw_die_ref context_die;
8198 register dw_die_ref type_die = new_die (DW_TAG_union_type, context_die);
8200 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8201 be incomplete and such types are not marked. */
8202 add_abstract_origin_attribute (type_die, type);
8205 /* Generate a DIE to represent an enumeration type. Note that these DIEs
8206 include all of the information about the enumeration values also. Each
8207 enumerated type name/value is listed as a child of the enumerated type
8211 gen_enumeration_type_die (type, context_die)
8213 register dw_die_ref context_die;
8215 register dw_die_ref type_die = lookup_type_die (type);
8217 if (type_die == NULL)
8219 type_die = new_die (DW_TAG_enumeration_type,
8220 scope_die_for (type, context_die));
8221 equate_type_number_to_die (type, type_die);
8222 add_name_attribute (type_die, type_tag (type));
8224 else if (! TYPE_SIZE (type))
8227 remove_AT (type_die, DW_AT_declaration);
8229 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
8230 given enum type is incomplete, do not generate the DW_AT_byte_size
8231 attribute or the DW_AT_element_list attribute. */
8232 if (TYPE_SIZE (type))
8236 TREE_ASM_WRITTEN (type) = 1;
8237 add_byte_size_attribute (type_die, type);
8238 if (TYPE_STUB_DECL (type) != NULL_TREE)
8239 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8241 /* If the first reference to this type was as the return type of an
8242 inline function, then it may not have a parent. Fix this now. */
8243 if (type_die->die_parent == NULL)
8244 add_child_die (scope_die_for (type, context_die), type_die);
8246 for (link = TYPE_FIELDS (type);
8247 link != NULL; link = TREE_CHAIN (link))
8249 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
8251 add_name_attribute (enum_die,
8252 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
8254 if (host_integerp (TREE_VALUE (link), 0))
8256 if (tree_int_cst_sgn (TREE_VALUE (link)) < 0)
8257 add_AT_int (enum_die, DW_AT_const_value,
8258 tree_low_cst (TREE_VALUE (link), 0));
8260 add_AT_unsigned (enum_die, DW_AT_const_value,
8261 tree_low_cst (TREE_VALUE (link), 0));
8266 add_AT_flag (type_die, DW_AT_declaration, 1);
8270 /* Generate a DIE to represent either a real live formal parameter decl or to
8271 represent just the type of some formal parameter position in some function
8274 Note that this routine is a bit unusual because its argument may be a
8275 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8276 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8277 node. If it's the former then this function is being called to output a
8278 DIE to represent a formal parameter object (or some inlining thereof). If
8279 it's the latter, then this function is only being called to output a
8280 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8281 argument type of some subprogram type. */
8284 gen_formal_parameter_die (node, context_die)
8286 register dw_die_ref context_die;
8288 register dw_die_ref parm_die
8289 = new_die (DW_TAG_formal_parameter, context_die);
8290 register tree origin;
8292 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8295 origin = decl_ultimate_origin (node);
8297 add_abstract_origin_attribute (parm_die, origin);
8300 add_name_and_src_coords_attributes (parm_die, node);
8301 add_type_attribute (parm_die, TREE_TYPE (node),
8302 TREE_READONLY (node),
8303 TREE_THIS_VOLATILE (node),
8305 if (DECL_ARTIFICIAL (node))
8306 add_AT_flag (parm_die, DW_AT_artificial, 1);
8309 equate_decl_number_to_die (node, parm_die);
8310 if (! DECL_ABSTRACT (node))
8311 add_location_or_const_value_attribute (parm_die, node);
8316 /* We were called with some kind of a ..._TYPE node. */
8317 add_type_attribute (parm_die, node, 0, 0, context_die);
8327 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8328 at the end of an (ANSI prototyped) formal parameters list. */
8331 gen_unspecified_parameters_die (decl_or_type, context_die)
8332 register tree decl_or_type ATTRIBUTE_UNUSED;
8333 register dw_die_ref context_die;
8335 new_die (DW_TAG_unspecified_parameters, context_die);
8338 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8339 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8340 parameters as specified in some function type specification (except for
8341 those which appear as part of a function *definition*). */
8344 gen_formal_types_die (function_or_method_type, context_die)
8345 register tree function_or_method_type;
8346 register dw_die_ref context_die;
8349 register tree formal_type = NULL;
8350 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8353 /* In the case where we are generating a formal types list for a C++
8354 non-static member function type, skip over the first thing on the
8355 TYPE_ARG_TYPES list because it only represents the type of the hidden
8356 `this pointer'. The debugger should be able to figure out (without
8357 being explicitly told) that this non-static member function type takes a
8358 `this pointer' and should be able to figure what the type of that hidden
8359 parameter is from the DW_AT_member attribute of the parent
8360 DW_TAG_subroutine_type DIE. */
8361 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8362 first_parm_type = TREE_CHAIN (first_parm_type);
8365 /* Make our first pass over the list of formal parameter types and output a
8366 DW_TAG_formal_parameter DIE for each one. */
8367 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8369 register dw_die_ref parm_die;
8371 formal_type = TREE_VALUE (link);
8372 if (formal_type == void_type_node)
8375 /* Output a (nameless) DIE to represent the formal parameter itself. */
8376 parm_die = gen_formal_parameter_die (formal_type, context_die);
8377 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8378 && link == first_parm_type)
8379 add_AT_flag (parm_die, DW_AT_artificial, 1);
8382 /* If this function type has an ellipsis, add a
8383 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8384 if (formal_type != void_type_node)
8385 gen_unspecified_parameters_die (function_or_method_type, context_die);
8387 /* Make our second (and final) pass over the list of formal parameter types
8388 and output DIEs to represent those types (as necessary). */
8389 for (link = TYPE_ARG_TYPES (function_or_method_type);
8391 link = TREE_CHAIN (link))
8393 formal_type = TREE_VALUE (link);
8394 if (formal_type == void_type_node)
8397 gen_type_die (formal_type, context_die);
8401 /* We want to generate the DIE for TYPE so that we can generate the
8402 die for MEMBER, which has been defined; we will need to refer back
8403 to the member declaration nested within TYPE. If we're trying to
8404 generate minimal debug info for TYPE, processing TYPE won't do the
8405 trick; we need to attach the member declaration by hand. */
8408 gen_type_die_for_member (type, member, context_die)
8410 dw_die_ref context_die;
8412 gen_type_die (type, context_die);
8414 /* If we're trying to avoid duplicate debug info, we may not have
8415 emitted the member decl for this function. Emit it now. */
8416 if (TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))
8417 && ! lookup_decl_die (member))
8419 if (decl_ultimate_origin (member))
8422 push_decl_scope (type);
8423 if (TREE_CODE (member) == FUNCTION_DECL)
8424 gen_subprogram_die (member, lookup_type_die (type));
8426 gen_variable_die (member, lookup_type_die (type));
8431 /* Generate the DWARF2 info for the "abstract" instance
8432 of a function which we may later generate inlined and/or
8433 out-of-line instances of. */
8436 gen_abstract_function (decl)
8439 register dw_die_ref old_die = lookup_decl_die (decl);
8442 if (old_die && get_AT_unsigned (old_die, DW_AT_inline))
8443 /* We've already generated the abstract instance. */
8446 save_fn = current_function_decl;
8447 current_function_decl = decl;
8449 set_decl_abstract_flags (decl, 1);
8450 dwarf2out_decl (decl);
8451 set_decl_abstract_flags (decl, 0);
8453 current_function_decl = save_fn;
8456 /* Generate a DIE to represent a declared function (either file-scope or
8460 gen_subprogram_die (decl, context_die)
8462 register dw_die_ref context_die;
8464 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8465 register tree origin = decl_ultimate_origin (decl);
8466 register dw_die_ref subr_die;
8467 register rtx fp_reg;
8468 register tree fn_arg_types;
8469 register tree outer_scope;
8470 register dw_die_ref old_die = lookup_decl_die (decl);
8471 register int declaration = (current_function_decl != decl
8472 || class_scope_p (context_die));
8474 /* Note that it is possible to have both DECL_ABSTRACT and `declaration'
8475 be true, if we started to generate the abstract instance of an inline,
8476 decided to output its containing class, and proceeded to emit the
8477 declaration of the inline from the member list for the class. In that
8478 case, `declaration' takes priority; we'll get back to the abstract
8479 instance when we're done with the class. */
8481 /* The class-scope declaration DIE must be the primary DIE. */
8482 if (origin && declaration && class_scope_p (context_die))
8491 if (declaration && ! local_scope_p (context_die))
8494 /* Fixup die_parent for the abstract instance of a nested
8496 if (old_die && old_die->die_parent == NULL)
8497 add_child_die (context_die, old_die);
8499 subr_die = new_die (DW_TAG_subprogram, context_die);
8500 add_abstract_origin_attribute (subr_die, origin);
8502 else if (old_die && DECL_ABSTRACT (decl)
8503 && get_AT_unsigned (old_die, DW_AT_inline))
8505 /* This must be a redefinition of an extern inline function.
8506 We can just reuse the old die here. */
8509 /* Clear out the inlined attribute and parm types. */
8510 remove_AT (subr_die, DW_AT_inline);
8511 remove_children (subr_die);
8515 register unsigned file_index
8516 = lookup_filename (DECL_SOURCE_FILE (decl));
8518 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8520 /* ??? This can happen if there is a bug in the program, for
8521 instance, if it has duplicate function definitions. Ideally,
8522 we should detect this case and ignore it. For now, if we have
8523 already reported an error, any error at all, then assume that
8524 we got here because of a input error, not a dwarf2 bug. */
8530 /* If the definition comes from the same place as the declaration,
8531 maybe use the old DIE. We always want the DIE for this function
8532 that has the *_pc attributes to be under comp_unit_die so the
8533 debugger can find it. For inlines, that is the concrete instance,
8534 so we can use the old DIE here. For non-inline methods, we want a
8535 specification DIE at toplevel, so we need a new DIE. For local
8536 class methods, this doesn't apply; we just use the old DIE. */
8537 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8538 || context_die == NULL)
8539 && (DECL_ARTIFICIAL (decl)
8540 || (get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8541 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8542 == (unsigned)DECL_SOURCE_LINE (decl)))))
8546 /* Clear out the declaration attribute and the parm types. */
8547 remove_AT (subr_die, DW_AT_declaration);
8548 remove_children (subr_die);
8552 subr_die = new_die (DW_TAG_subprogram, context_die);
8553 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8554 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8555 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8556 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8557 != (unsigned)DECL_SOURCE_LINE (decl))
8559 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8564 subr_die = new_die (DW_TAG_subprogram, context_die);
8566 if (TREE_PUBLIC (decl))
8567 add_AT_flag (subr_die, DW_AT_external, 1);
8569 add_name_and_src_coords_attributes (subr_die, decl);
8570 if (debug_info_level > DINFO_LEVEL_TERSE)
8572 register tree type = TREE_TYPE (decl);
8574 add_prototyped_attribute (subr_die, type);
8575 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8578 add_pure_or_virtual_attribute (subr_die, decl);
8579 if (DECL_ARTIFICIAL (decl))
8580 add_AT_flag (subr_die, DW_AT_artificial, 1);
8581 if (TREE_PROTECTED (decl))
8582 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8583 else if (TREE_PRIVATE (decl))
8584 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8590 add_AT_flag (subr_die, DW_AT_declaration, 1);
8592 /* The first time we see a member function, it is in the context of
8593 the class to which it belongs. We make sure of this by emitting
8594 the class first. The next time is the definition, which is
8595 handled above. The two may come from the same source text. */
8596 if (DECL_CONTEXT (decl) || DECL_ABSTRACT (decl))
8597 equate_decl_number_to_die (decl, subr_die);
8599 else if (DECL_ABSTRACT (decl))
8601 if (DECL_INLINE (decl) && !flag_no_inline)
8603 /* ??? Checking DECL_DEFER_OUTPUT is correct for static
8604 inline functions, but not for extern inline functions.
8605 We can't get this completely correct because information
8606 about whether the function was declared inline is not
8608 if (DECL_DEFER_OUTPUT (decl))
8609 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8611 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8614 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined);
8616 equate_decl_number_to_die (decl, subr_die);
8618 else if (!DECL_EXTERNAL (decl))
8620 if (origin == NULL_TREE)
8621 equate_decl_number_to_die (decl, subr_die);
8623 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8624 current_funcdef_number);
8625 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8626 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8627 current_funcdef_number);
8628 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8630 add_pubname (decl, subr_die);
8631 add_arange (decl, subr_die);
8633 #ifdef MIPS_DEBUGGING_INFO
8634 /* Add a reference to the FDE for this routine. */
8635 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8638 /* Define the "frame base" location for this routine. We use the
8639 frame pointer or stack pointer registers, since the RTL for local
8640 variables is relative to one of them. */
8642 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8643 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8646 /* ??? This fails for nested inline functions, because context_display
8647 is not part of the state saved/restored for inline functions. */
8648 if (current_function_needs_context)
8649 add_AT_location_description (subr_die, DW_AT_static_link,
8650 lookup_static_chain (decl));
8654 /* Now output descriptions of the arguments for this function. This gets
8655 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8656 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8657 `...' at the end of the formal parameter list. In order to find out if
8658 there was a trailing ellipsis or not, we must instead look at the type
8659 associated with the FUNCTION_DECL. This will be a node of type
8660 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8661 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8662 an ellipsis at the end. */
8664 /* In the case where we are describing a mere function declaration, all we
8665 need to do here (and all we *can* do here) is to describe the *types* of
8666 its formal parameters. */
8667 if (debug_info_level <= DINFO_LEVEL_TERSE)
8669 else if (declaration)
8670 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8673 /* Generate DIEs to represent all known formal parameters */
8674 register tree arg_decls = DECL_ARGUMENTS (decl);
8677 /* When generating DIEs, generate the unspecified_parameters DIE
8678 instead if we come across the arg "__builtin_va_alist" */
8679 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8680 if (TREE_CODE (parm) == PARM_DECL)
8682 if (DECL_NAME (parm)
8683 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8684 "__builtin_va_alist"))
8685 gen_unspecified_parameters_die (parm, subr_die);
8687 gen_decl_die (parm, subr_die);
8690 /* Decide whether we need a unspecified_parameters DIE at the end.
8691 There are 2 more cases to do this for: 1) the ansi ... declaration -
8692 this is detectable when the end of the arg list is not a
8693 void_type_node 2) an unprototyped function declaration (not a
8694 definition). This just means that we have no info about the
8695 parameters at all. */
8696 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8697 if (fn_arg_types != NULL)
8699 /* this is the prototyped case, check for ... */
8700 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8701 gen_unspecified_parameters_die (decl, subr_die);
8703 else if (DECL_INITIAL (decl) == NULL_TREE)
8704 gen_unspecified_parameters_die (decl, subr_die);
8707 /* Output Dwarf info for all of the stuff within the body of the function
8708 (if it has one - it may be just a declaration). */
8709 outer_scope = DECL_INITIAL (decl);
8711 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8712 node created to represent a function. This outermost BLOCK actually
8713 represents the outermost binding contour for the function, i.e. the
8714 contour in which the function's formal parameters and labels get
8715 declared. Curiously, it appears that the front end doesn't actually
8716 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8717 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8718 list for the function instead.) The BLOCK_VARS list for the
8719 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8720 the function however, and we output DWARF info for those in
8721 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8722 node representing the function's outermost pair of curly braces, and
8723 any blocks used for the base and member initializers of a C++
8724 constructor function. */
8725 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8727 current_function_has_inlines = 0;
8728 decls_for_scope (outer_scope, subr_die, 0);
8730 #if 0 && defined (MIPS_DEBUGGING_INFO)
8731 if (current_function_has_inlines)
8733 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8734 if (! comp_unit_has_inlines)
8736 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8737 comp_unit_has_inlines = 1;
8744 /* Generate a DIE to represent a declared data object. */
8747 gen_variable_die (decl, context_die)
8749 register dw_die_ref context_die;
8751 register tree origin = decl_ultimate_origin (decl);
8752 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8754 dw_die_ref old_die = lookup_decl_die (decl);
8755 int declaration = (DECL_EXTERNAL (decl)
8756 || class_scope_p (context_die));
8759 add_abstract_origin_attribute (var_die, origin);
8760 /* Loop unrolling can create multiple blocks that refer to the same
8761 static variable, so we must test for the DW_AT_declaration flag. */
8762 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8763 copy decls and set the DECL_ABSTRACT flag on them instead of
8765 else if (old_die && TREE_STATIC (decl)
8766 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8768 /* This is a definition of a C++ class level static. */
8769 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8770 if (DECL_NAME (decl))
8772 register unsigned file_index
8773 = lookup_filename (DECL_SOURCE_FILE (decl));
8775 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8776 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8778 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8779 != (unsigned)DECL_SOURCE_LINE (decl))
8781 add_AT_unsigned (var_die, DW_AT_decl_line,
8782 DECL_SOURCE_LINE (decl));
8787 add_name_and_src_coords_attributes (var_die, decl);
8788 add_type_attribute (var_die, TREE_TYPE (decl),
8789 TREE_READONLY (decl),
8790 TREE_THIS_VOLATILE (decl), context_die);
8792 if (TREE_PUBLIC (decl))
8793 add_AT_flag (var_die, DW_AT_external, 1);
8795 if (DECL_ARTIFICIAL (decl))
8796 add_AT_flag (var_die, DW_AT_artificial, 1);
8798 if (TREE_PROTECTED (decl))
8799 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8801 else if (TREE_PRIVATE (decl))
8802 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8806 add_AT_flag (var_die, DW_AT_declaration, 1);
8808 if (class_scope_p (context_die) || DECL_ABSTRACT (decl))
8809 equate_decl_number_to_die (decl, var_die);
8811 if (! declaration && ! DECL_ABSTRACT (decl))
8813 add_location_or_const_value_attribute (var_die, decl);
8814 add_pubname (decl, var_die);
8818 /* Generate a DIE to represent a label identifier. */
8821 gen_label_die (decl, context_die)
8823 register dw_die_ref context_die;
8825 register tree origin = decl_ultimate_origin (decl);
8826 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8828 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8829 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8832 add_abstract_origin_attribute (lbl_die, origin);
8834 add_name_and_src_coords_attributes (lbl_die, decl);
8836 if (DECL_ABSTRACT (decl))
8837 equate_decl_number_to_die (decl, lbl_die);
8840 insn = DECL_RTL (decl);
8842 /* Deleted labels are programmer specified labels which have been
8843 eliminated because of various optimisations. We still emit them
8844 here so that it is possible to put breakpoints on them. */
8845 if (GET_CODE (insn) == CODE_LABEL
8846 || ((GET_CODE (insn) == NOTE
8847 && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)))
8849 /* When optimization is enabled (via -O) some parts of the compiler
8850 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8851 represent source-level labels which were explicitly declared by
8852 the user. This really shouldn't be happening though, so catch
8853 it if it ever does happen. */
8854 if (INSN_DELETED_P (insn))
8857 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8858 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8859 (unsigned) INSN_UID (insn));
8860 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8865 /* Generate a DIE for a lexical block. */
8868 gen_lexical_block_die (stmt, context_die, depth)
8870 register dw_die_ref context_die;
8873 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8874 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8876 if (! BLOCK_ABSTRACT (stmt))
8878 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8879 BLOCK_NUMBER (stmt));
8880 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8881 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
8882 BLOCK_NUMBER (stmt));
8883 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8886 decls_for_scope (stmt, stmt_die, depth);
8889 /* Generate a DIE for an inlined subprogram. */
8892 gen_inlined_subroutine_die (stmt, context_die, depth)
8894 register dw_die_ref context_die;
8897 if (! BLOCK_ABSTRACT (stmt))
8899 register dw_die_ref subr_die
8900 = new_die (DW_TAG_inlined_subroutine, context_die);
8901 register tree decl = block_ultimate_origin (stmt);
8902 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8904 /* Emit info for the abstract instance first, if we haven't yet. */
8905 gen_abstract_function (decl);
8907 add_abstract_origin_attribute (subr_die, decl);
8908 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8909 BLOCK_NUMBER (stmt));
8910 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8911 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
8912 BLOCK_NUMBER (stmt));
8913 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8914 decls_for_scope (stmt, subr_die, depth);
8915 current_function_has_inlines = 1;
8919 /* Generate a DIE for a field in a record, or structure. */
8922 gen_field_die (decl, context_die)
8924 register dw_die_ref context_die;
8926 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8928 add_name_and_src_coords_attributes (decl_die, decl);
8929 add_type_attribute (decl_die, member_declared_type (decl),
8930 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8933 /* If this is a bit field... */
8934 if (DECL_BIT_FIELD_TYPE (decl))
8936 add_byte_size_attribute (decl_die, decl);
8937 add_bit_size_attribute (decl_die, decl);
8938 add_bit_offset_attribute (decl_die, decl);
8941 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8942 add_data_member_location_attribute (decl_die, decl);
8944 if (DECL_ARTIFICIAL (decl))
8945 add_AT_flag (decl_die, DW_AT_artificial, 1);
8947 if (TREE_PROTECTED (decl))
8948 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8950 else if (TREE_PRIVATE (decl))
8951 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8955 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8956 Use modified_type_die instead.
8957 We keep this code here just in case these types of DIEs may be needed to
8958 represent certain things in other languages (e.g. Pascal) someday. */
8960 gen_pointer_type_die (type, context_die)
8962 register dw_die_ref context_die;
8964 register dw_die_ref ptr_die
8965 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8967 equate_type_number_to_die (type, ptr_die);
8968 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8969 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8972 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8973 Use modified_type_die instead.
8974 We keep this code here just in case these types of DIEs may be needed to
8975 represent certain things in other languages (e.g. Pascal) someday. */
8977 gen_reference_type_die (type, context_die)
8979 register dw_die_ref context_die;
8981 register dw_die_ref ref_die
8982 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8984 equate_type_number_to_die (type, ref_die);
8985 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8986 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8990 /* Generate a DIE for a pointer to a member type. */
8992 gen_ptr_to_mbr_type_die (type, context_die)
8994 register dw_die_ref context_die;
8996 register dw_die_ref ptr_die
8997 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8999 equate_type_number_to_die (type, ptr_die);
9000 add_AT_die_ref (ptr_die, DW_AT_containing_type,
9001 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
9002 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
9005 /* Generate the DIE for the compilation unit. */
9008 gen_compile_unit_die (filename)
9009 register const char *filename;
9011 register dw_die_ref die;
9013 const char *wd = getpwd ();
9016 die = new_die (DW_TAG_compile_unit, NULL);
9017 add_name_attribute (die, filename);
9019 if (wd != NULL && filename[0] != DIR_SEPARATOR)
9020 add_AT_string (die, DW_AT_comp_dir, wd);
9022 sprintf (producer, "%s %s", language_string, version_string);
9024 #ifdef MIPS_DEBUGGING_INFO
9025 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
9026 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
9027 not appear in the producer string, the debugger reaches the conclusion
9028 that the object file is stripped and has no debugging information.
9029 To get the MIPS/SGI debugger to believe that there is debugging
9030 information in the object file, we add a -g to the producer string. */
9031 if (debug_info_level > DINFO_LEVEL_TERSE)
9032 strcat (producer, " -g");
9035 add_AT_string (die, DW_AT_producer, producer);
9037 if (strcmp (language_string, "GNU C++") == 0)
9038 language = DW_LANG_C_plus_plus;
9039 else if (strcmp (language_string, "GNU Ada") == 0)
9040 language = DW_LANG_Ada83;
9041 else if (strcmp (language_string, "GNU F77") == 0)
9042 language = DW_LANG_Fortran77;
9043 else if (strcmp (language_string, "GNU Pascal") == 0)
9044 language = DW_LANG_Pascal83;
9045 else if (flag_traditional)
9046 language = DW_LANG_C;
9048 language = DW_LANG_C89;
9050 add_AT_unsigned (die, DW_AT_language, language);
9055 /* Generate a DIE for a string type. */
9058 gen_string_type_die (type, context_die)
9060 register dw_die_ref context_die;
9062 register dw_die_ref type_die
9063 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
9065 equate_type_number_to_die (type, type_die);
9067 /* Fudge the string length attribute for now. */
9069 /* TODO: add string length info.
9070 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
9071 bound_representation (upper_bound, 0, 'u'); */
9074 /* Generate the DIE for a base class. */
9077 gen_inheritance_die (binfo, context_die)
9078 register tree binfo;
9079 register dw_die_ref context_die;
9081 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
9083 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
9084 add_data_member_location_attribute (die, binfo);
9086 if (TREE_VIA_VIRTUAL (binfo))
9087 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
9088 if (TREE_VIA_PUBLIC (binfo))
9089 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
9090 else if (TREE_VIA_PROTECTED (binfo))
9091 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
9094 /* Generate a DIE for a class member. */
9097 gen_member_die (type, context_die)
9099 register dw_die_ref context_die;
9101 register tree member;
9104 /* If this is not an incomplete type, output descriptions of each of its
9105 members. Note that as we output the DIEs necessary to represent the
9106 members of this record or union type, we will also be trying to output
9107 DIEs to represent the *types* of those members. However the `type'
9108 function (above) will specifically avoid generating type DIEs for member
9109 types *within* the list of member DIEs for this (containing) type execpt
9110 for those types (of members) which are explicitly marked as also being
9111 members of this (containing) type themselves. The g++ front- end can
9112 force any given type to be treated as a member of some other
9113 (containing) type by setting the TYPE_CONTEXT of the given (member) type
9114 to point to the TREE node representing the appropriate (containing)
9117 /* First output info about the base classes. */
9118 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
9120 register tree bases = TYPE_BINFO_BASETYPES (type);
9121 register int n_bases = TREE_VEC_LENGTH (bases);
9124 for (i = 0; i < n_bases; i++)
9125 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
9128 /* Now output info about the data members and type members. */
9129 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
9131 /* If we thought we were generating minimal debug info for TYPE
9132 and then changed our minds, some of the member declarations
9133 may have already been defined. Don't define them again, but
9134 do put them in the right order. */
9136 child = lookup_decl_die (member);
9138 splice_child_die (context_die, child);
9140 gen_decl_die (member, context_die);
9143 /* Now output info about the function members (if any). */
9144 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
9146 child = lookup_decl_die (member);
9148 splice_child_die (context_die, child);
9150 gen_decl_die (member, context_die);
9154 /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG
9155 is set, we pretend that the type was never defined, so we only get the
9156 member DIEs needed by later specification DIEs. */
9159 gen_struct_or_union_type_die (type, context_die)
9161 register dw_die_ref context_die;
9163 register dw_die_ref type_die = lookup_type_die (type);
9164 register dw_die_ref scope_die = 0;
9165 register int nested = 0;
9166 int complete = (TYPE_SIZE (type)
9167 && (! TYPE_STUB_DECL (type)
9168 || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))));
9170 if (type_die && ! complete)
9173 if (TYPE_CONTEXT (type) != NULL_TREE
9174 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)))
9177 scope_die = scope_die_for (type, context_die);
9179 if (! type_die || (nested && scope_die == comp_unit_die))
9180 /* First occurrence of type or toplevel definition of nested class. */
9182 register dw_die_ref old_die = type_die;
9184 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
9185 ? DW_TAG_structure_type : DW_TAG_union_type,
9187 equate_type_number_to_die (type, type_die);
9188 add_name_attribute (type_die, type_tag (type));
9190 add_AT_die_ref (type_die, DW_AT_specification, old_die);
9193 remove_AT (type_die, DW_AT_declaration);
9195 /* If this type has been completed, then give it a byte_size attribute and
9196 then give a list of members. */
9199 /* Prevent infinite recursion in cases where the type of some member of
9200 this type is expressed in terms of this type itself. */
9201 TREE_ASM_WRITTEN (type) = 1;
9202 add_byte_size_attribute (type_die, type);
9203 if (TYPE_STUB_DECL (type) != NULL_TREE)
9204 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
9206 /* If the first reference to this type was as the return type of an
9207 inline function, then it may not have a parent. Fix this now. */
9208 if (type_die->die_parent == NULL)
9209 add_child_die (scope_die, type_die);
9211 push_decl_scope (type);
9212 gen_member_die (type, type_die);
9215 /* GNU extension: Record what type our vtable lives in. */
9216 if (TYPE_VFIELD (type))
9218 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
9220 gen_type_die (vtype, context_die);
9221 add_AT_die_ref (type_die, DW_AT_containing_type,
9222 lookup_type_die (vtype));
9227 add_AT_flag (type_die, DW_AT_declaration, 1);
9229 /* We don't need to do this for function-local types. */
9230 if (! decl_function_context (TYPE_STUB_DECL (type)))
9231 add_incomplete_type (type);
9235 /* Generate a DIE for a subroutine _type_. */
9238 gen_subroutine_type_die (type, context_die)
9240 register dw_die_ref context_die;
9242 register tree return_type = TREE_TYPE (type);
9243 register dw_die_ref subr_die
9244 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
9246 equate_type_number_to_die (type, subr_die);
9247 add_prototyped_attribute (subr_die, type);
9248 add_type_attribute (subr_die, return_type, 0, 0, context_die);
9249 gen_formal_types_die (type, subr_die);
9252 /* Generate a DIE for a type definition */
9255 gen_typedef_die (decl, context_die)
9257 register dw_die_ref context_die;
9259 register dw_die_ref type_die;
9260 register tree origin;
9262 if (TREE_ASM_WRITTEN (decl))
9264 TREE_ASM_WRITTEN (decl) = 1;
9266 type_die = new_die (DW_TAG_typedef, context_die);
9267 origin = decl_ultimate_origin (decl);
9269 add_abstract_origin_attribute (type_die, origin);
9273 add_name_and_src_coords_attributes (type_die, decl);
9274 if (DECL_ORIGINAL_TYPE (decl))
9276 type = DECL_ORIGINAL_TYPE (decl);
9277 equate_type_number_to_die (TREE_TYPE (decl), type_die);
9280 type = TREE_TYPE (decl);
9281 add_type_attribute (type_die, type, TREE_READONLY (decl),
9282 TREE_THIS_VOLATILE (decl), context_die);
9285 if (DECL_ABSTRACT (decl))
9286 equate_decl_number_to_die (decl, type_die);
9289 /* Generate a type description DIE. */
9292 gen_type_die (type, context_die)
9294 register dw_die_ref context_die;
9298 if (type == NULL_TREE || type == error_mark_node)
9301 /* We are going to output a DIE to represent the unqualified version of
9302 this type (i.e. without any const or volatile qualifiers) so get the
9303 main variant (i.e. the unqualified version) of this type now. */
9304 type = type_main_variant (type);
9306 if (TREE_ASM_WRITTEN (type))
9309 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9310 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
9312 TREE_ASM_WRITTEN (type) = 1;
9313 gen_decl_die (TYPE_NAME (type), context_die);
9317 switch (TREE_CODE (type))
9323 case REFERENCE_TYPE:
9324 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
9325 ensures that the gen_type_die recursion will terminate even if the
9326 type is recursive. Recursive types are possible in Ada. */
9327 /* ??? We could perhaps do this for all types before the switch
9329 TREE_ASM_WRITTEN (type) = 1;
9331 /* For these types, all that is required is that we output a DIE (or a
9332 set of DIEs) to represent the "basis" type. */
9333 gen_type_die (TREE_TYPE (type), context_die);
9337 /* This code is used for C++ pointer-to-data-member types.
9338 Output a description of the relevant class type. */
9339 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
9341 /* Output a description of the type of the object pointed to. */
9342 gen_type_die (TREE_TYPE (type), context_die);
9344 /* Now output a DIE to represent this pointer-to-data-member type
9346 gen_ptr_to_mbr_type_die (type, context_die);
9350 gen_type_die (TYPE_DOMAIN (type), context_die);
9351 gen_set_type_die (type, context_die);
9355 gen_type_die (TREE_TYPE (type), context_die);
9356 abort (); /* No way to represent these in Dwarf yet! */
9360 /* Force out return type (in case it wasn't forced out already). */
9361 gen_type_die (TREE_TYPE (type), context_die);
9362 gen_subroutine_type_die (type, context_die);
9366 /* Force out return type (in case it wasn't forced out already). */
9367 gen_type_die (TREE_TYPE (type), context_die);
9368 gen_subroutine_type_die (type, context_die);
9372 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9374 gen_type_die (TREE_TYPE (type), context_die);
9375 gen_string_type_die (type, context_die);
9378 gen_array_type_die (type, context_die);
9382 gen_type_die (TYPE_DEBUG_REPRESENTATION_TYPE (type), context_die);
9388 case QUAL_UNION_TYPE:
9389 /* If this is a nested type whose containing class hasn't been
9390 written out yet, writing it out will cover this one, too.
9391 This does not apply to instantiations of member class templates;
9392 they need to be added to the containing class as they are
9393 generated. FIXME: This hurts the idea of combining type decls
9394 from multiple TUs, since we can't predict what set of template
9395 instantiations we'll get. */
9396 if (TYPE_CONTEXT (type)
9397 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9398 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9400 gen_type_die (TYPE_CONTEXT (type), context_die);
9402 if (TREE_ASM_WRITTEN (type))
9405 /* If that failed, attach ourselves to the stub. */
9406 push_decl_scope (TYPE_CONTEXT (type));
9407 context_die = lookup_type_die (TYPE_CONTEXT (type));
9413 if (TREE_CODE (type) == ENUMERAL_TYPE)
9414 gen_enumeration_type_die (type, context_die);
9416 gen_struct_or_union_type_die (type, context_die);
9421 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9422 it up if it is ever completed. gen_*_type_die will set it for us
9423 when appropriate. */
9432 /* No DIEs needed for fundamental types. */
9436 /* No Dwarf representation currently defined. */
9443 TREE_ASM_WRITTEN (type) = 1;
9446 /* Generate a DIE for a tagged type instantiation. */
9449 gen_tagged_type_instantiation_die (type, context_die)
9451 register dw_die_ref context_die;
9453 if (type == NULL_TREE || type == error_mark_node)
9456 /* We are going to output a DIE to represent the unqualified version of
9457 this type (i.e. without any const or volatile qualifiers) so make sure
9458 that we have the main variant (i.e. the unqualified version) of this
9460 if (type != type_main_variant (type))
9463 /* Do not check TREE_ASM_WRITTEN (type) as it may not be set if this is
9464 an instance of an unresolved type. */
9466 switch (TREE_CODE (type))
9472 gen_inlined_enumeration_type_die (type, context_die);
9476 gen_inlined_structure_type_die (type, context_die);
9480 case QUAL_UNION_TYPE:
9481 gen_inlined_union_type_die (type, context_die);
9489 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9490 things which are local to the given block. */
9493 gen_block_die (stmt, context_die, depth)
9495 register dw_die_ref context_die;
9498 register int must_output_die = 0;
9499 register tree origin;
9501 register enum tree_code origin_code;
9503 /* Ignore blocks never really used to make RTL. */
9505 if (stmt == NULL_TREE || !TREE_USED (stmt)
9506 || (!TREE_ASM_WRITTEN (stmt) && !BLOCK_ABSTRACT (stmt)))
9509 /* Determine the "ultimate origin" of this block. This block may be an
9510 inlined instance of an inlined instance of inline function, so we have
9511 to trace all of the way back through the origin chain to find out what
9512 sort of node actually served as the original seed for the creation of
9513 the current block. */
9514 origin = block_ultimate_origin (stmt);
9515 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9517 /* Determine if we need to output any Dwarf DIEs at all to represent this
9519 if (origin_code == FUNCTION_DECL)
9520 /* The outer scopes for inlinings *must* always be represented. We
9521 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9522 must_output_die = 1;
9525 /* In the case where the current block represents an inlining of the
9526 "body block" of an inline function, we must *NOT* output any DIE for
9527 this block because we have already output a DIE to represent the
9528 whole inlined function scope and the "body block" of any function
9529 doesn't really represent a different scope according to ANSI C
9530 rules. So we check here to make sure that this block does not
9531 represent a "body block inlining" before trying to set the
9532 `must_output_die' flag. */
9533 if (! is_body_block (origin ? origin : stmt))
9535 /* Determine if this block directly contains any "significant"
9536 local declarations which we will need to output DIEs for. */
9537 if (debug_info_level > DINFO_LEVEL_TERSE)
9538 /* We are not in terse mode so *any* local declaration counts
9539 as being a "significant" one. */
9540 must_output_die = (BLOCK_VARS (stmt) != NULL);
9542 /* We are in terse mode, so only local (nested) function
9543 definitions count as "significant" local declarations. */
9544 for (decl = BLOCK_VARS (stmt);
9545 decl != NULL; decl = TREE_CHAIN (decl))
9546 if (TREE_CODE (decl) == FUNCTION_DECL
9547 && DECL_INITIAL (decl))
9549 must_output_die = 1;
9555 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9556 DIE for any block which contains no significant local declarations at
9557 all. Rather, in such cases we just call `decls_for_scope' so that any
9558 needed Dwarf info for any sub-blocks will get properly generated. Note
9559 that in terse mode, our definition of what constitutes a "significant"
9560 local declaration gets restricted to include only inlined function
9561 instances and local (nested) function definitions. */
9562 if (must_output_die)
9564 if (origin_code == FUNCTION_DECL)
9565 gen_inlined_subroutine_die (stmt, context_die, depth);
9567 gen_lexical_block_die (stmt, context_die, depth);
9570 decls_for_scope (stmt, context_die, depth);
9573 /* Generate all of the decls declared within a given scope and (recursively)
9574 all of its sub-blocks. */
9577 decls_for_scope (stmt, context_die, depth)
9579 register dw_die_ref context_die;
9583 register tree subblocks;
9585 /* Ignore blocks never really used to make RTL. */
9586 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9589 /* Output the DIEs to represent all of the data objects and typedefs
9590 declared directly within this block but not within any nested
9591 sub-blocks. Also, nested function and tag DIEs have been
9592 generated with a parent of NULL; fix that up now. */
9593 for (decl = BLOCK_VARS (stmt);
9594 decl != NULL; decl = TREE_CHAIN (decl))
9596 register dw_die_ref die;
9598 if (TREE_CODE (decl) == FUNCTION_DECL)
9599 die = lookup_decl_die (decl);
9600 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9601 die = lookup_type_die (TREE_TYPE (decl));
9605 if (die != NULL && die->die_parent == NULL)
9606 add_child_die (context_die, die);
9608 gen_decl_die (decl, context_die);
9611 /* Output the DIEs to represent all sub-blocks (and the items declared
9612 therein) of this block. */
9613 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9615 subblocks = BLOCK_CHAIN (subblocks))
9616 gen_block_die (subblocks, context_die, depth + 1);
9619 /* Is this a typedef we can avoid emitting? */
9622 is_redundant_typedef (decl)
9625 if (TYPE_DECL_IS_STUB (decl))
9628 if (DECL_ARTIFICIAL (decl)
9629 && DECL_CONTEXT (decl)
9630 && is_tagged_type (DECL_CONTEXT (decl))
9631 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9632 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9633 /* Also ignore the artificial member typedef for the class name. */
9639 /* Generate Dwarf debug information for a decl described by DECL. */
9642 gen_decl_die (decl, context_die)
9644 register dw_die_ref context_die;
9646 register tree origin;
9648 if (TREE_CODE (decl) == ERROR_MARK)
9651 /* If this ..._DECL node is marked to be ignored, then ignore it. */
9652 if (DECL_IGNORED_P (decl))
9655 switch (TREE_CODE (decl))
9658 /* The individual enumerators of an enum type get output when we output
9659 the Dwarf representation of the relevant enum type itself. */
9663 /* Don't output any DIEs to represent mere function declarations,
9664 unless they are class members or explicit block externs. */
9665 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9666 && (current_function_decl == NULL_TREE || DECL_ARTIFICIAL (decl)))
9669 /* If we're emitting an out-of-line copy of an inline function,
9670 emit info for the abstract instance and set up to refer to it. */
9671 if (DECL_INLINE (decl) && ! DECL_ABSTRACT (decl)
9672 && ! class_scope_p (context_die))
9674 gen_abstract_function (decl);
9675 set_decl_origin_self (decl);
9678 if (debug_info_level > DINFO_LEVEL_TERSE)
9680 /* Before we describe the FUNCTION_DECL itself, make sure that we
9681 have described its return type. */
9682 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9684 /* And its virtual context. */
9685 if (DECL_VINDEX (decl) != NULL_TREE)
9686 gen_type_die (DECL_CONTEXT (decl), context_die);
9688 /* And its containing type. */
9689 origin = decl_class_context (decl);
9690 if (origin != NULL_TREE)
9691 gen_type_die_for_member (origin, decl, context_die);
9694 /* Now output a DIE to represent the function itself. */
9695 gen_subprogram_die (decl, context_die);
9699 /* If we are in terse mode, don't generate any DIEs to represent any
9701 if (debug_info_level <= DINFO_LEVEL_TERSE)
9704 /* In the special case of a TYPE_DECL node representing the
9705 declaration of some type tag, if the given TYPE_DECL is marked as
9706 having been instantiated from some other (original) TYPE_DECL node
9707 (e.g. one which was generated within the original definition of an
9708 inline function) we have to generate a special (abbreviated)
9709 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9711 if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE)
9713 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9717 if (is_redundant_typedef (decl))
9718 gen_type_die (TREE_TYPE (decl), context_die);
9720 /* Output a DIE to represent the typedef itself. */
9721 gen_typedef_die (decl, context_die);
9725 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9726 gen_label_die (decl, context_die);
9730 /* If we are in terse mode, don't generate any DIEs to represent any
9731 variable declarations or definitions. */
9732 if (debug_info_level <= DINFO_LEVEL_TERSE)
9735 /* Output any DIEs that are needed to specify the type of this data
9737 gen_type_die (TREE_TYPE (decl), context_die);
9739 /* And its containing type. */
9740 origin = decl_class_context (decl);
9741 if (origin != NULL_TREE)
9742 gen_type_die_for_member (origin, decl, context_die);
9744 /* Now output the DIE to represent the data object itself. This gets
9745 complicated because of the possibility that the VAR_DECL really
9746 represents an inlined instance of a formal parameter for an inline
9748 origin = decl_ultimate_origin (decl);
9749 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9750 gen_formal_parameter_die (decl, context_die);
9752 gen_variable_die (decl, context_die);
9756 /* Ignore the nameless fields that are used to skip bits, but
9757 handle C++ anonymous unions. */
9758 if (DECL_NAME (decl) != NULL_TREE
9759 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9761 gen_type_die (member_declared_type (decl), context_die);
9762 gen_field_die (decl, context_die);
9767 gen_type_die (TREE_TYPE (decl), context_die);
9768 gen_formal_parameter_die (decl, context_die);
9771 case NAMESPACE_DECL:
9772 /* Ignore for now. */
9780 /* Add Ada "use" clause information for SGI Workshop debugger. */
9783 dwarf2out_add_library_unit_info (filename, context_list)
9784 const char *filename;
9785 const char *context_list;
9787 unsigned int file_index;
9789 if (filename != NULL)
9791 dw_die_ref unit_die = new_die (DW_TAG_module, comp_unit_die);
9792 tree context_list_decl
9793 = build_decl (LABEL_DECL, get_identifier (context_list),
9796 TREE_PUBLIC (context_list_decl) = TRUE;
9797 add_name_attribute (unit_die, context_list);
9798 file_index = lookup_filename (filename);
9799 add_AT_unsigned (unit_die, DW_AT_decl_file, file_index);
9800 add_pubname (context_list_decl, unit_die);
9804 /* Write the debugging output for DECL. */
9807 dwarf2out_decl (decl)
9810 register dw_die_ref context_die = comp_unit_die;
9812 if (TREE_CODE (decl) == ERROR_MARK)
9815 /* If this ..._DECL node is marked to be ignored, then ignore it. */
9816 if (DECL_IGNORED_P (decl))
9819 switch (TREE_CODE (decl))
9822 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9823 builtin function. Explicit programmer-supplied declarations of
9824 these same functions should NOT be ignored however. */
9825 if (DECL_EXTERNAL (decl) && DECL_BUILT_IN (decl))
9828 /* What we would really like to do here is to filter out all mere
9829 file-scope declarations of file-scope functions which are never
9830 referenced later within this translation unit (and keep all of ones
9831 that *are* referenced later on) but we aren't clairvoyant, so we have
9832 no idea which functions will be referenced in the future (i.e. later
9833 on within the current translation unit). So here we just ignore all
9834 file-scope function declarations which are not also definitions. If
9835 and when the debugger needs to know something about these functions,
9836 it will have to hunt around and find the DWARF information associated
9837 with the definition of the function. Note that we can't just check
9838 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9839 definitions and which ones represent mere declarations. We have to
9840 check `DECL_INITIAL' instead. That's because the C front-end
9841 supports some weird semantics for "extern inline" function
9842 definitions. These can get inlined within the current translation
9843 unit (an thus, we need to generate DWARF info for their abstract
9844 instances so that the DWARF info for the concrete inlined instances
9845 can have something to refer to) but the compiler never generates any
9846 out-of-lines instances of such things (despite the fact that they
9847 *are* definitions). The important point is that the C front-end
9848 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9849 to generate DWARF for them anyway. Note that the C++ front-end also
9850 plays some similar games for inline function definitions appearing
9851 within include files which also contain
9852 `#pragma interface' pragmas. */
9853 if (DECL_INITIAL (decl) == NULL_TREE)
9856 /* If we're a nested function, initially use a parent of NULL; if we're
9857 a plain function, this will be fixed up in decls_for_scope. If
9858 we're a method, it will be ignored, since we already have a DIE. */
9859 if (decl_function_context (decl))
9865 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9866 declaration and if the declaration was never even referenced from
9867 within this entire compilation unit. We suppress these DIEs in
9868 order to save space in the .debug section (by eliminating entries
9869 which are probably useless). Note that we must not suppress
9870 block-local extern declarations (whether used or not) because that
9871 would screw-up the debugger's name lookup mechanism and cause it to
9872 miss things which really ought to be in scope at a given point. */
9873 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9876 /* If we are in terse mode, don't generate any DIEs to represent any
9877 variable declarations or definitions. */
9878 if (debug_info_level <= DINFO_LEVEL_TERSE)
9883 /* Don't emit stubs for types unless they are needed by other DIEs. */
9884 if (TYPE_DECL_SUPPRESS_DEBUG (decl))
9887 /* Don't bother trying to generate any DIEs to represent any of the
9888 normal built-in types for the language we are compiling. */
9889 if (DECL_SOURCE_LINE (decl) == 0)
9891 /* OK, we need to generate one for `bool' so GDB knows what type
9892 comparisons have. */
9893 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9894 == DW_LANG_C_plus_plus)
9895 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9896 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9901 /* If we are in terse mode, don't generate any DIEs for types. */
9902 if (debug_info_level <= DINFO_LEVEL_TERSE)
9905 /* If we're a function-scope tag, initially use a parent of NULL;
9906 this will be fixed up in decls_for_scope. */
9907 if (decl_function_context (decl))
9916 gen_decl_die (decl, context_die);
9919 /* Output a marker (i.e. a label) for the beginning of the generated code for
9923 dwarf2out_begin_block (blocknum)
9924 register unsigned blocknum;
9926 function_section (current_function_decl);
9927 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9930 /* Output a marker (i.e. a label) for the end of the generated code for a
9934 dwarf2out_end_block (blocknum)
9935 register unsigned blocknum;
9937 function_section (current_function_decl);
9938 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9941 /* Returns nonzero if it is appropriate not to emit any debugging
9942 information for BLOCK, because it doesn't contain any instructions.
9944 Don't allow this for blocks with nested functions or local classes
9945 as we would end up with orphans, and in the presence of scheduling
9946 we may end up calling them anyway. */
9949 dwarf2out_ignore_block (block)
9953 for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl))
9954 if (TREE_CODE (decl) == FUNCTION_DECL
9955 || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)))
9960 /* Output a marker (i.e. a label) at a point in the assembly code which
9961 corresponds to a given source level label. */
9964 dwarf2out_label (insn)
9967 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9969 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9971 function_section (current_function_decl);
9972 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9973 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9974 (unsigned) INSN_UID (insn));
9978 /* Lookup a filename (in the list of filenames that we know about here in
9979 dwarf2out.c) and return its "index". The index of each (known) filename is
9980 just a unique number which is associated with only that one filename.
9981 We need such numbers for the sake of generating labels
9982 (in the .debug_sfnames section) and references to those
9983 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9984 If the filename given as an argument is not found in our current list,
9985 add it to the list and assign it the next available unique index number.
9986 In order to speed up searches, we remember the index of the filename
9987 was looked up last. This handles the majority of all searches. */
9990 lookup_filename (file_name)
9991 const char *file_name;
9993 static unsigned last_file_lookup_index = 0;
9994 register unsigned i;
9996 /* Check to see if the file name that was searched on the previous call
9997 matches this file name. If so, return the index. */
9998 if (last_file_lookup_index != 0)
9999 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
10000 return last_file_lookup_index;
10002 /* Didn't match the previous lookup, search the table */
10003 for (i = 1; i < file_table_in_use; ++i)
10004 if (strcmp (file_name, file_table[i]) == 0)
10006 last_file_lookup_index = i;
10010 /* Prepare to add a new table entry by making sure there is enough space in
10011 the table to do so. If not, expand the current table. */
10012 if (file_table_in_use == file_table_allocated)
10014 file_table_allocated += FILE_TABLE_INCREMENT;
10016 = (char **) xrealloc (file_table,
10017 file_table_allocated * sizeof (char *));
10020 /* Add the new entry to the end of the filename table. */
10021 file_table[file_table_in_use] = xstrdup (file_name);
10022 last_file_lookup_index = file_table_in_use++;
10024 return last_file_lookup_index;
10027 /* Output a label to mark the beginning of a source code line entry
10028 and record information relating to this source line, in
10029 'line_info_table' for later output of the .debug_line section. */
10032 dwarf2out_line (filename, line)
10033 register const char *filename;
10034 register unsigned line;
10036 if (debug_info_level >= DINFO_LEVEL_NORMAL)
10038 function_section (current_function_decl);
10040 if (DWARF2_ASM_LINE_DEBUG_INFO)
10042 static const char *lastfile;
10044 /* Emit the .file and .loc directives understood by GNU as. */
10045 if (lastfile == 0 || strcmp (filename, lastfile))
10048 ggc_add_string_root ((char **) &lastfile, 1);
10050 fprintf (asm_out_file, "\t.file 0 \"%s\"\n", filename);
10051 lastfile = filename;
10054 fprintf (asm_out_file, "\t.loc 0 %d 0\n", line);
10056 /* Indicate that line number info exists. */
10057 ++line_info_table_in_use;
10059 /* Indicate that multiple line number tables exist. */
10060 if (DECL_SECTION_NAME (current_function_decl))
10061 ++separate_line_info_table_in_use;
10063 else if (DECL_SECTION_NAME (current_function_decl))
10065 register dw_separate_line_info_ref line_info;
10066 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
10067 separate_line_info_table_in_use);
10068 if (flag_debug_asm)
10069 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
10070 fputc ('\n', asm_out_file);
10072 /* expand the line info table if necessary */
10073 if (separate_line_info_table_in_use
10074 == separate_line_info_table_allocated)
10076 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
10077 separate_line_info_table
10078 = (dw_separate_line_info_ref)
10079 xrealloc (separate_line_info_table,
10080 separate_line_info_table_allocated
10081 * sizeof (dw_separate_line_info_entry));
10084 /* Add the new entry at the end of the line_info_table. */
10086 = &separate_line_info_table[separate_line_info_table_in_use++];
10087 line_info->dw_file_num = lookup_filename (filename);
10088 line_info->dw_line_num = line;
10089 line_info->function = current_funcdef_number;
10093 register dw_line_info_ref line_info;
10095 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
10096 line_info_table_in_use);
10097 if (flag_debug_asm)
10098 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
10099 fputc ('\n', asm_out_file);
10101 /* Expand the line info table if necessary. */
10102 if (line_info_table_in_use == line_info_table_allocated)
10104 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
10106 = (dw_line_info_ref)
10107 xrealloc (line_info_table,
10108 (line_info_table_allocated
10109 * sizeof (dw_line_info_entry)));
10112 /* Add the new entry at the end of the line_info_table. */
10113 line_info = &line_info_table[line_info_table_in_use++];
10114 line_info->dw_file_num = lookup_filename (filename);
10115 line_info->dw_line_num = line;
10120 /* Record the beginning of a new source file, for later output
10121 of the .debug_macinfo section. At present, unimplemented. */
10124 dwarf2out_start_source_file (filename)
10125 register const char *filename ATTRIBUTE_UNUSED;
10129 /* Record the end of a source file, for later output
10130 of the .debug_macinfo section. At present, unimplemented. */
10133 dwarf2out_end_source_file ()
10137 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10138 the tail part of the directive line, i.e. the part which is past the
10139 initial whitespace, #, whitespace, directive-name, whitespace part. */
10142 dwarf2out_define (lineno, buffer)
10143 register unsigned lineno ATTRIBUTE_UNUSED;
10144 register const char *buffer ATTRIBUTE_UNUSED;
10146 static int initialized = 0;
10149 dwarf2out_start_source_file (primary_filename);
10154 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10155 the tail part of the directive line, i.e. the part which is past the
10156 initial whitespace, #, whitespace, directive-name, whitespace part. */
10159 dwarf2out_undef (lineno, buffer)
10160 register unsigned lineno ATTRIBUTE_UNUSED;
10161 register const char *buffer ATTRIBUTE_UNUSED;
10165 /* Set up for Dwarf output at the start of compilation. */
10168 dwarf2out_init (asm_out_file, main_input_filename)
10169 register FILE *asm_out_file;
10170 register const char *main_input_filename;
10172 /* Remember the name of the primary input file. */
10173 primary_filename = main_input_filename;
10175 /* Allocate the initial hunk of the file_table. */
10176 file_table = (char **) xcalloc (FILE_TABLE_INCREMENT, sizeof (char *));
10177 file_table_allocated = FILE_TABLE_INCREMENT;
10179 /* Skip the first entry - file numbers begin at 1. */
10180 file_table_in_use = 1;
10182 /* Allocate the initial hunk of the decl_die_table. */
10184 = (dw_die_ref *) xcalloc (DECL_DIE_TABLE_INCREMENT, sizeof (dw_die_ref));
10185 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
10186 decl_die_table_in_use = 0;
10188 /* Allocate the initial hunk of the decl_scope_table. */
10190 = (tree *) xcalloc (DECL_SCOPE_TABLE_INCREMENT, sizeof (tree));
10191 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
10192 decl_scope_depth = 0;
10194 /* Allocate the initial hunk of the abbrev_die_table. */
10196 = (dw_die_ref *) xcalloc (ABBREV_DIE_TABLE_INCREMENT,
10197 sizeof (dw_die_ref));
10198 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
10199 /* Zero-th entry is allocated, but unused */
10200 abbrev_die_table_in_use = 1;
10202 /* Allocate the initial hunk of the line_info_table. */
10204 = (dw_line_info_ref) xcalloc (LINE_INFO_TABLE_INCREMENT,
10205 sizeof (dw_line_info_entry));
10206 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
10207 /* Zero-th entry is allocated, but unused */
10208 line_info_table_in_use = 1;
10210 /* Generate the initial DIE for the .debug section. Note that the (string)
10211 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
10212 will (typically) be a relative pathname and that this pathname should be
10213 taken as being relative to the directory from which the compiler was
10214 invoked when the given (base) source file was compiled. */
10215 comp_unit_die = gen_compile_unit_die (main_input_filename);
10219 VARRAY_RTX_INIT (used_rtx_varray, 32, "used_rtx_varray");
10220 ggc_add_rtx_varray_root (&used_rtx_varray, 1);
10223 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
10224 ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, ABBREV_SECTION_LABEL, 0);
10225 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10226 ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0);
10228 strcpy (text_section_label, stripattributes (TEXT_SECTION));
10229 ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label,
10230 DEBUG_INFO_SECTION_LABEL, 0);
10231 ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label,
10232 DEBUG_LINE_SECTION_LABEL, 0);
10234 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10235 ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
10236 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10238 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10239 ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
10241 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10242 ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
10243 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10244 ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
10247 /* Output stuff that dwarf requires at the end of every file,
10248 and generate the DWARF-2 debugging info. */
10251 dwarf2out_finish ()
10253 limbo_die_node *node, *next_node;
10256 /* Traverse the limbo die list, and add parent/child links. The only
10257 dies without parents that should be here are concrete instances of
10258 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
10259 For concrete instances, we can get the parent die from the abstract
10261 for (node = limbo_die_list; node; node = next_node)
10263 next_node = node->next;
10266 if (die->die_parent == NULL)
10268 dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin);
10270 add_child_die (origin->die_parent, die);
10271 else if (die == comp_unit_die)
10278 limbo_die_list = NULL;
10280 /* Walk through the list of incomplete types again, trying once more to
10281 emit full debugging info for them. */
10282 retry_incomplete_types ();
10284 /* Traverse the DIE's, reverse their lists of attributes and children,
10285 and add add sibling attributes to those DIE's that have children. */
10286 add_sibling_attributes (comp_unit_die);
10288 /* Output a terminator label for the .text section. */
10289 fputc ('\n', asm_out_file);
10290 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10291 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
10294 /* Output a terminator label for the .data section. */
10295 fputc ('\n', asm_out_file);
10296 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
10297 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
10299 /* Output a terminator label for the .bss section. */
10300 fputc ('\n', asm_out_file);
10301 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
10302 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
10305 /* Output the source line correspondence table. */
10306 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
10308 if (! DWARF2_ASM_LINE_DEBUG_INFO)
10310 fputc ('\n', asm_out_file);
10311 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10312 output_line_info ();
10315 /* We can only use the low/high_pc attributes if all of the code
10317 if (separate_line_info_table_in_use == 0)
10319 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label);
10320 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
10323 add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list,
10324 debug_line_section_label);
10327 #if 0 /* unimplemented */
10328 if (debug_info_level >= DINFO_LEVEL_VERBOSE && primary)
10329 add_AT_unsigned (die, DW_AT_macro_info, 0);
10332 /* Output the abbreviation table. */
10333 fputc ('\n', asm_out_file);
10334 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10335 build_abbrev_table (comp_unit_die);
10336 output_abbrev_section ();
10338 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
10339 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
10340 calc_die_sizes (comp_unit_die);
10342 /* Output debugging information. */
10343 fputc ('\n', asm_out_file);
10344 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10345 output_compilation_unit_header ();
10346 output_die (comp_unit_die);
10348 if (pubname_table_in_use)
10350 /* Output public names table. */
10351 fputc ('\n', asm_out_file);
10352 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
10353 output_pubnames ();
10356 /* We only put functions in the arange table, so don't write it out if
10357 we don't have any. */
10358 if (fde_table_in_use)
10360 /* Output the address range information. */
10361 fputc ('\n', asm_out_file);
10362 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
10366 #endif /* DWARF2_DEBUGGING_INFO */