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 for (i = 0; i < DWARF_FRAME_REGISTERS; ++i)
631 int offset = DWARF_FRAME_REGNUM (i) * GET_MODE_SIZE (mode);
632 int size = GET_MODE_SIZE (reg_raw_mode[i]);
637 emit_move_insn (change_address (mem, mode,
638 plus_constant (addr, offset)),
643 /* Convert a DWARF call frame info. operation to its string name */
646 dwarf_cfi_name (cfi_opc)
647 register unsigned cfi_opc;
651 case DW_CFA_advance_loc:
652 return "DW_CFA_advance_loc";
654 return "DW_CFA_offset";
656 return "DW_CFA_restore";
660 return "DW_CFA_set_loc";
661 case DW_CFA_advance_loc1:
662 return "DW_CFA_advance_loc1";
663 case DW_CFA_advance_loc2:
664 return "DW_CFA_advance_loc2";
665 case DW_CFA_advance_loc4:
666 return "DW_CFA_advance_loc4";
667 case DW_CFA_offset_extended:
668 return "DW_CFA_offset_extended";
669 case DW_CFA_restore_extended:
670 return "DW_CFA_restore_extended";
671 case DW_CFA_undefined:
672 return "DW_CFA_undefined";
673 case DW_CFA_same_value:
674 return "DW_CFA_same_value";
675 case DW_CFA_register:
676 return "DW_CFA_register";
677 case DW_CFA_remember_state:
678 return "DW_CFA_remember_state";
679 case DW_CFA_restore_state:
680 return "DW_CFA_restore_state";
682 return "DW_CFA_def_cfa";
683 case DW_CFA_def_cfa_register:
684 return "DW_CFA_def_cfa_register";
685 case DW_CFA_def_cfa_offset:
686 return "DW_CFA_def_cfa_offset";
687 case DW_CFA_def_cfa_expression:
688 return "DW_CFA_def_cfa_expression";
690 /* SGI/MIPS specific */
691 case DW_CFA_MIPS_advance_loc8:
692 return "DW_CFA_MIPS_advance_loc8";
695 case DW_CFA_GNU_window_save:
696 return "DW_CFA_GNU_window_save";
697 case DW_CFA_GNU_args_size:
698 return "DW_CFA_GNU_args_size";
699 case DW_CFA_GNU_negative_offset_extended:
700 return "DW_CFA_GNU_negative_offset_extended";
703 return "DW_CFA_<unknown>";
707 /* Return a pointer to a newly allocated Call Frame Instruction. */
709 static inline dw_cfi_ref
712 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
714 cfi->dw_cfi_next = NULL;
715 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
716 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
721 /* Add a Call Frame Instruction to list of instructions. */
724 add_cfi (list_head, cfi)
725 register dw_cfi_ref *list_head;
726 register dw_cfi_ref cfi;
728 register dw_cfi_ref *p;
730 /* Find the end of the chain. */
731 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
737 /* Generate a new label for the CFI info to refer to. */
740 dwarf2out_cfi_label ()
742 static char label[20];
743 static unsigned long label_num = 0;
745 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
746 ASM_OUTPUT_LABEL (asm_out_file, label);
751 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
752 or to the CIE if LABEL is NULL. */
755 add_fde_cfi (label, cfi)
756 register const char *label;
757 register dw_cfi_ref cfi;
761 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
764 label = dwarf2out_cfi_label ();
766 if (fde->dw_fde_current_label == NULL
767 || strcmp (label, fde->dw_fde_current_label) != 0)
769 register dw_cfi_ref xcfi;
771 fde->dw_fde_current_label = label = xstrdup (label);
773 /* Set the location counter to the new label. */
775 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
776 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
777 add_cfi (&fde->dw_fde_cfi, xcfi);
780 add_cfi (&fde->dw_fde_cfi, cfi);
784 add_cfi (&cie_cfi_head, cfi);
787 /* Subroutine of lookup_cfa. */
790 lookup_cfa_1 (cfi, loc)
791 register dw_cfi_ref cfi;
792 register dw_cfa_location *loc;
794 switch (cfi->dw_cfi_opc)
796 case DW_CFA_def_cfa_offset:
797 loc->offset = cfi->dw_cfi_oprnd1.dw_cfi_offset;
799 case DW_CFA_def_cfa_register:
800 loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
803 loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
804 loc->offset = cfi->dw_cfi_oprnd2.dw_cfi_offset;
806 case DW_CFA_def_cfa_expression:
807 get_cfa_from_loc_descr (loc, cfi->dw_cfi_oprnd1.dw_cfi_loc);
814 /* Find the previous value for the CFA. */
818 register dw_cfa_location *loc;
820 register dw_cfi_ref cfi;
822 loc->reg = (unsigned long) -1;
825 loc->base_offset = 0;
827 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
828 lookup_cfa_1 (cfi, loc);
830 if (fde_table_in_use)
832 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
833 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
834 lookup_cfa_1 (cfi, loc);
838 /* The current rule for calculating the DWARF2 canonical frame address. */
841 /* The register used for saving registers to the stack, and its offset
843 dw_cfa_location cfa_store;
845 /* The running total of the size of arguments pushed onto the stack. */
846 static long args_size;
848 /* The last args_size we actually output. */
849 static long old_args_size;
851 /* Entry point to update the canonical frame address (CFA).
852 LABEL is passed to add_fde_cfi. The value of CFA is now to be
853 calculated from REG+OFFSET. */
856 dwarf2out_def_cfa (label, reg, offset)
857 register const char *label;
866 def_cfa_1 (label, &loc);
869 /* This routine does the actual work. The CFA is now calculated from
870 the dw_cfa_location structure. */
872 def_cfa_1 (label, loc_p)
873 register const char *label;
874 dw_cfa_location *loc_p;
876 register dw_cfi_ref cfi;
877 dw_cfa_location old_cfa, loc;
882 if (cfa_store.reg == loc.reg && loc.indirect == 0)
883 cfa_store.offset = loc.offset;
885 loc.reg = DWARF_FRAME_REGNUM (loc.reg);
886 lookup_cfa (&old_cfa);
888 if (loc.reg == old_cfa.reg && loc.offset == old_cfa.offset &&
889 loc.indirect == old_cfa.indirect)
891 if (loc.indirect == 0)
894 if (loc.base_offset == old_cfa.base_offset)
900 if (loc.reg == old_cfa.reg && loc.indirect == old_cfa.indirect)
902 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
903 cfi->dw_cfi_oprnd1.dw_cfi_offset = loc.offset;
906 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
907 else if (loc.offset == old_cfa.offset && old_cfa.reg != (unsigned long) -1
908 && loc.indirect == old_cfa.indirect)
910 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
911 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg;
915 else if (loc.indirect == 0)
917 cfi->dw_cfi_opc = DW_CFA_def_cfa;
918 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg;
919 cfi->dw_cfi_oprnd2.dw_cfi_offset = loc.offset;
923 struct dw_loc_descr_struct * loc_list;
924 cfi->dw_cfi_opc = DW_CFA_def_cfa_expression;
925 loc_list = build_cfa_loc (&loc);
926 cfi->dw_cfi_oprnd1.dw_cfi_loc = loc_list;
929 add_fde_cfi (label, cfi);
932 /* Add the CFI for saving a register. REG is the CFA column number.
933 LABEL is passed to add_fde_cfi.
934 If SREG is -1, the register is saved at OFFSET from the CFA;
935 otherwise it is saved in SREG. */
938 reg_save (label, reg, sreg, offset)
939 register const char *label;
940 register unsigned reg;
941 register unsigned sreg;
942 register long offset;
944 register dw_cfi_ref cfi = new_cfi ();
946 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
948 /* The following comparison is correct. -1 is used to indicate that
949 the value isn't a register number. */
950 if (sreg == (unsigned int) -1)
953 /* The register number won't fit in 6 bits, so we have to use
955 cfi->dw_cfi_opc = DW_CFA_offset_extended;
957 cfi->dw_cfi_opc = DW_CFA_offset;
959 offset /= DWARF_CIE_DATA_ALIGNMENT;
962 cfi->dw_cfi_opc = DW_CFA_GNU_negative_offset_extended;
965 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
967 else if (sreg == reg)
968 /* We could emit a DW_CFA_same_value in this case, but don't bother. */
972 cfi->dw_cfi_opc = DW_CFA_register;
973 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
976 add_fde_cfi (label, cfi);
979 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
980 This CFI tells the unwinder that it needs to restore the window registers
981 from the previous frame's window save area.
983 ??? Perhaps we should note in the CIE where windows are saved (instead of
984 assuming 0(cfa)) and what registers are in the window. */
987 dwarf2out_window_save (label)
988 register const char *label;
990 register dw_cfi_ref cfi = new_cfi ();
991 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
992 add_fde_cfi (label, cfi);
995 /* Add a CFI to update the running total of the size of arguments
996 pushed onto the stack. */
999 dwarf2out_args_size (label, size)
1003 register dw_cfi_ref cfi;
1005 if (size == old_args_size)
1007 old_args_size = size;
1010 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
1011 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
1012 add_fde_cfi (label, cfi);
1015 /* Entry point for saving a register to the stack. REG is the GCC register
1016 number. LABEL and OFFSET are passed to reg_save. */
1019 dwarf2out_reg_save (label, reg, offset)
1020 register const char *label;
1021 register unsigned reg;
1022 register long offset;
1024 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
1027 /* Entry point for saving the return address in the stack.
1028 LABEL and OFFSET are passed to reg_save. */
1031 dwarf2out_return_save (label, offset)
1032 register const char *label;
1033 register long offset;
1035 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1038 /* Entry point for saving the return address in a register.
1039 LABEL and SREG are passed to reg_save. */
1042 dwarf2out_return_reg (label, sreg)
1043 register const char *label;
1044 register unsigned sreg;
1046 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1049 /* Record the initial position of the return address. RTL is
1050 INCOMING_RETURN_ADDR_RTX. */
1053 initial_return_save (rtl)
1056 unsigned int reg = (unsigned int) -1;
1059 switch (GET_CODE (rtl))
1062 /* RA is in a register. */
1063 reg = DWARF_FRAME_REGNUM (REGNO (rtl));
1066 /* RA is on the stack. */
1067 rtl = XEXP (rtl, 0);
1068 switch (GET_CODE (rtl))
1071 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1076 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1078 offset = INTVAL (XEXP (rtl, 1));
1081 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1083 offset = -INTVAL (XEXP (rtl, 1));
1090 /* The return address is at some offset from any value we can
1091 actually load. For instance, on the SPARC it is in %i7+8. Just
1092 ignore the offset for now; it doesn't matter for unwinding frames. */
1093 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1095 initial_return_save (XEXP (rtl, 0));
1101 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset);
1104 /* Check INSN to see if it looks like a push or a stack adjustment, and
1105 make a note of it if it does. EH uses this information to find out how
1106 much extra space it needs to pop off the stack. */
1109 dwarf2out_stack_adjust (insn)
1115 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1117 /* Extract the size of the args from the CALL rtx itself. */
1119 insn = PATTERN (insn);
1120 if (GET_CODE (insn) == PARALLEL)
1121 insn = XVECEXP (insn, 0, 0);
1122 if (GET_CODE (insn) == SET)
1123 insn = SET_SRC (insn);
1124 assert (GET_CODE (insn) == CALL);
1125 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1129 /* If only calls can throw, and we have a frame pointer,
1130 save up adjustments until we see the CALL_INSN. */
1131 else if (! asynchronous_exceptions
1132 && cfa.reg != STACK_POINTER_REGNUM)
1135 if (GET_CODE (insn) == BARRIER)
1137 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1138 the compiler will have already emitted a stack adjustment, but
1139 doesn't bother for calls to noreturn functions. */
1140 #ifdef STACK_GROWS_DOWNWARD
1141 offset = -args_size;
1146 else if (GET_CODE (PATTERN (insn)) == SET)
1151 insn = PATTERN (insn);
1152 src = SET_SRC (insn);
1153 dest = SET_DEST (insn);
1155 if (dest == stack_pointer_rtx)
1157 /* (set (reg sp) (plus (reg sp) (const_int))) */
1158 code = GET_CODE (src);
1159 if (! (code == PLUS || code == MINUS)
1160 || XEXP (src, 0) != stack_pointer_rtx
1161 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1164 offset = INTVAL (XEXP (src, 1));
1166 else if (GET_CODE (dest) == MEM)
1168 /* (set (mem (pre_dec (reg sp))) (foo)) */
1169 src = XEXP (dest, 0);
1170 code = GET_CODE (src);
1172 if (! (code == PRE_DEC || code == PRE_INC)
1173 || XEXP (src, 0) != stack_pointer_rtx)
1176 offset = GET_MODE_SIZE (GET_MODE (dest));
1181 if (code == PLUS || code == PRE_INC)
1190 if (cfa.reg == STACK_POINTER_REGNUM)
1191 cfa.offset += offset;
1193 #ifndef STACK_GROWS_DOWNWARD
1196 args_size += offset;
1200 label = dwarf2out_cfi_label ();
1201 def_cfa_1 (label, &cfa);
1202 dwarf2out_args_size (label, args_size);
1205 /* A temporary register used in adjusting SP or setting up the store_reg. */
1206 static unsigned cfa_temp_reg;
1208 /* A temporary value used in adjusting SP or setting up the store_reg. */
1209 static long cfa_temp_value;
1211 /* If we see a store of the CFA register, remember it in case we later also
1212 copy it into another register. The ARM saves the old SP in the stack,
1213 but it also has a usable FP. */
1214 static unsigned cfa_old_reg;
1216 /* Record call frame debugging information for an expression, which either
1217 sets SP or FP (adjusting how we calculate the frame address) or saves a
1218 register to the stack. */
1221 dwarf2out_frame_debug_expr (expr, label)
1228 /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of
1229 the PARALLEL independantly. The first element is always processed if
1230 it is a SET. This is for backward compatability. Other elements
1231 are processed only if they are SETs and the RTX_FRAME_RELATED_P
1232 flag is set in them. */
1234 if (GET_CODE (expr) == PARALLEL)
1237 int limit = XVECLEN (expr, 0);
1239 for (par_index = 0; par_index < limit; par_index++)
1241 rtx x = XVECEXP (expr, 0, par_index);
1243 if (GET_CODE (x) == SET &&
1244 (RTX_FRAME_RELATED_P (x) || par_index == 0))
1245 dwarf2out_frame_debug_expr (x, label);
1250 if (GET_CODE (expr) != SET)
1253 src = SET_SRC (expr);
1254 dest = SET_DEST (expr);
1256 switch (GET_CODE (dest))
1259 /* Update the CFA rule wrt SP or FP. Make sure src is
1260 relative to the current CFA register. */
1261 switch (GET_CODE (src))
1263 /* Setting FP from SP. */
1265 if (cfa.reg == (unsigned) REGNO (src)
1266 || (cfa.indirect && cfa_old_reg == (unsigned) REGNO (src)))
1271 /* We used to require that dest be either SP or FP, but the
1272 ARM copies SP to a temporary register, and from there to
1273 FP. So we just rely on the backends to only set
1274 RTX_FRAME_RELATED_P on appropriate insns. */
1275 cfa.reg = REGNO (dest);
1281 if (dest == stack_pointer_rtx)
1284 switch (GET_CODE (XEXP (src, 1)))
1287 offset = INTVAL (XEXP (src, 1));
1290 if ((unsigned) REGNO (XEXP (src, 1)) != cfa_temp_reg)
1292 offset = cfa_temp_value;
1298 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1300 /* Restoring SP from FP in the epilogue. */
1301 if (cfa.reg != (unsigned) HARD_FRAME_POINTER_REGNUM)
1303 cfa.reg = STACK_POINTER_REGNUM;
1305 else if (XEXP (src, 0) != stack_pointer_rtx)
1308 if (GET_CODE (src) == PLUS)
1310 if (cfa.reg == STACK_POINTER_REGNUM)
1311 cfa.offset += offset;
1312 if (cfa_store.reg == STACK_POINTER_REGNUM)
1313 cfa_store.offset += offset;
1315 else if (dest == hard_frame_pointer_rtx)
1317 /* Either setting the FP from an offset of the SP,
1318 or adjusting the FP */
1319 if (! frame_pointer_needed)
1322 if (GET_CODE (XEXP (src, 0)) == REG
1323 && (unsigned) REGNO (XEXP (src, 0)) == cfa.reg
1324 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1326 offset = INTVAL (XEXP (src, 1));
1327 if (GET_CODE (src) == PLUS)
1329 cfa.offset += offset;
1330 cfa.reg = HARD_FRAME_POINTER_REGNUM;
1337 if (GET_CODE (src) != PLUS
1338 || XEXP (src, 1) != stack_pointer_rtx)
1340 if (GET_CODE (XEXP (src, 0)) != REG
1341 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg)
1343 if (cfa.reg != STACK_POINTER_REGNUM)
1345 cfa_store.reg = REGNO (dest);
1346 cfa_store.offset = cfa.offset - cfa_temp_value;
1351 cfa_temp_reg = REGNO (dest);
1352 cfa_temp_value = INTVAL (src);
1356 if (GET_CODE (XEXP (src, 0)) != REG
1357 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg
1358 || (unsigned) REGNO (dest) != cfa_temp_reg
1359 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1361 cfa_temp_value |= INTVAL (XEXP (src, 1));
1367 def_cfa_1 (label, &cfa);
1370 /* Skip over HIGH, assuming it will be followed by a LO_SUM, which
1371 will fill in all of the bits. */
1376 cfa_temp_reg = REGNO (dest);
1377 cfa_temp_value = INTVAL (XEXP (src, 1));
1381 if (GET_CODE (src) != REG)
1384 /* If the src is our current CFA, and it isn't the SP or FP, then we're
1385 going to have to use an indrect mechanism. */
1386 if (REGNO (src) != STACK_POINTER_REGNUM
1387 && REGNO (src) != HARD_FRAME_POINTER_REGNUM
1388 && (unsigned) REGNO (src) == cfa.reg
1389 /* Temporary KLUDGE to make ARM work. */
1390 && GET_CODE (XEXP (dest, 0)) != PRE_DEC)
1392 /* We currently allow this to be ONLY a MEM or MEM + offset. */
1393 rtx x = XEXP (dest, 0);
1395 if (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS)
1397 offset = INTVAL (XEXP (x, 1));
1398 if (GET_CODE (x) == MINUS)
1402 if (GET_CODE (x) != REG)
1404 cfa_old_reg = cfa.reg;
1405 cfa.reg = (unsigned) REGNO (x);
1406 cfa.base_offset = offset;
1408 def_cfa_1 (label, &cfa);
1412 /* Saving a register to the stack. Make sure dest is relative to the
1414 switch (GET_CODE (XEXP (dest, 0)))
1419 offset = GET_MODE_SIZE (GET_MODE (dest));
1420 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1423 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1424 || cfa_store.reg != STACK_POINTER_REGNUM)
1426 cfa_store.offset += offset;
1427 if (cfa.reg == STACK_POINTER_REGNUM)
1428 cfa.offset = cfa_store.offset;
1430 offset = -cfa_store.offset;
1433 /* With an offset. */
1436 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1437 if (GET_CODE (XEXP (dest, 0)) == MINUS)
1440 if (cfa_store.reg != (unsigned) REGNO (XEXP (XEXP (dest, 0), 0)))
1442 offset -= cfa_store.offset;
1445 /* Without an offset. */
1447 if (cfa_store.reg != (unsigned) REGNO (XEXP (dest, 0)))
1449 offset = -cfa_store.offset;
1455 def_cfa_1 (label, &cfa);
1456 dwarf2out_reg_save (label, REGNO (src), offset);
1465 /* Record call frame debugging information for INSN, which either
1466 sets SP or FP (adjusting how we calculate the frame address) or saves a
1467 register to the stack. If INSN is NULL_RTX, initialize our state. */
1470 dwarf2out_frame_debug (insn)
1476 if (insn == NULL_RTX)
1478 /* Set up state for generating call frame debug info. */
1480 if (cfa.reg != (unsigned long) DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1482 cfa.reg = STACK_POINTER_REGNUM;
1489 if (! RTX_FRAME_RELATED_P (insn))
1491 dwarf2out_stack_adjust (insn);
1495 label = dwarf2out_cfi_label ();
1497 src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX);
1499 insn = XEXP (src, 0);
1501 insn = PATTERN (insn);
1503 dwarf2out_frame_debug_expr (insn, label);
1506 /* Return the size of an unsigned LEB128 quantity. */
1508 static inline unsigned long
1509 size_of_uleb128 (value)
1510 register unsigned long value;
1512 register unsigned long size = 0;
1513 register unsigned byte;
1517 byte = (value & 0x7f);
1526 /* Return the size of a signed LEB128 quantity. */
1528 static inline unsigned long
1529 size_of_sleb128 (value)
1530 register long value;
1532 register unsigned long size = 0;
1533 register unsigned byte;
1537 byte = (value & 0x7f);
1541 while (!(((value == 0) && ((byte & 0x40) == 0))
1542 || ((value == -1) && ((byte & 0x40) != 0))));
1547 /* Output an unsigned LEB128 quantity. */
1550 output_uleb128 (value)
1551 register unsigned long value;
1553 unsigned long save_value = value;
1555 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1558 register unsigned byte = (value & 0x7f);
1561 /* More bytes to follow. */
1564 fprintf (asm_out_file, "0x%x", byte);
1566 fprintf (asm_out_file, ",");
1571 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1574 /* Output an signed LEB128 quantity. */
1577 output_sleb128 (value)
1578 register long value;
1581 register unsigned byte;
1582 long save_value = value;
1584 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1587 byte = (value & 0x7f);
1588 /* arithmetic shift */
1590 more = !((((value == 0) && ((byte & 0x40) == 0))
1591 || ((value == -1) && ((byte & 0x40) != 0))));
1595 fprintf (asm_out_file, "0x%x", byte);
1597 fprintf (asm_out_file, ",");
1602 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1605 /* Output a Call Frame Information opcode and its operand(s). */
1608 output_cfi (cfi, fde)
1609 register dw_cfi_ref cfi;
1610 register dw_fde_ref fde;
1612 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1614 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1616 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1618 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1619 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1620 fputc ('\n', asm_out_file);
1623 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1625 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1627 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1629 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1630 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1632 fputc ('\n', asm_out_file);
1633 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1634 fputc ('\n', asm_out_file);
1636 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1638 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1640 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1642 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1643 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1645 fputc ('\n', asm_out_file);
1649 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1651 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1652 dwarf_cfi_name (cfi->dw_cfi_opc));
1654 fputc ('\n', asm_out_file);
1655 switch (cfi->dw_cfi_opc)
1657 case DW_CFA_set_loc:
1658 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1659 fputc ('\n', asm_out_file);
1661 case DW_CFA_advance_loc1:
1662 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1663 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1664 fde->dw_fde_current_label);
1665 fputc ('\n', asm_out_file);
1666 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1668 case DW_CFA_advance_loc2:
1669 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1670 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1671 fde->dw_fde_current_label);
1672 fputc ('\n', asm_out_file);
1673 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1675 case DW_CFA_advance_loc4:
1676 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1677 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1678 fde->dw_fde_current_label);
1679 fputc ('\n', asm_out_file);
1680 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1682 #ifdef MIPS_DEBUGGING_INFO
1683 case DW_CFA_MIPS_advance_loc8:
1684 /* TODO: not currently implemented. */
1688 case DW_CFA_offset_extended:
1689 case DW_CFA_GNU_negative_offset_extended:
1690 case DW_CFA_def_cfa:
1691 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1692 fputc ('\n', asm_out_file);
1693 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1694 fputc ('\n', asm_out_file);
1696 case DW_CFA_restore_extended:
1697 case DW_CFA_undefined:
1698 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1699 fputc ('\n', asm_out_file);
1701 case DW_CFA_same_value:
1702 case DW_CFA_def_cfa_register:
1703 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1704 fputc ('\n', asm_out_file);
1706 case DW_CFA_register:
1707 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1708 fputc ('\n', asm_out_file);
1709 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1710 fputc ('\n', asm_out_file);
1712 case DW_CFA_def_cfa_offset:
1713 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1714 fputc ('\n', asm_out_file);
1716 case DW_CFA_GNU_window_save:
1718 case DW_CFA_GNU_args_size:
1719 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1720 fputc ('\n', asm_out_file);
1722 case DW_CFA_def_cfa_expression:
1723 output_cfa_loc (cfi);
1731 /* Output the call frame information used to used to record information
1732 that relates to calculating the frame pointer, and records the
1733 location of saved registers. */
1736 output_call_frame_info (for_eh)
1739 register unsigned long i;
1740 register dw_fde_ref fde;
1741 register dw_cfi_ref cfi;
1742 char l1[20], l2[20];
1743 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1747 /* Do we want to include a pointer to the exception table? */
1748 int eh_ptr = for_eh && exception_table_p ();
1750 /* If we don't have any functions we'll want to unwind out of, don't
1751 emit any EH unwind information. */
1754 for (i = 0; i < fde_table_in_use; ++i)
1755 if (! fde_table[i].nothrow)
1761 fputc ('\n', asm_out_file);
1763 /* We're going to be generating comments, so turn on app. */
1769 #ifdef EH_FRAME_SECTION
1770 EH_FRAME_SECTION ();
1772 tree label = get_file_function_name ('F');
1774 force_data_section ();
1775 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1776 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1777 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1779 assemble_label ("__FRAME_BEGIN__");
1782 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1784 /* Output the CIE. */
1785 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1786 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1787 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1788 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1790 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1792 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1795 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1797 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1800 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1803 fputc ('\n', asm_out_file);
1804 ASM_OUTPUT_LABEL (asm_out_file, l1);
1807 /* Now that the CIE pointer is PC-relative for EH,
1808 use 0 to identify the CIE. */
1809 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1811 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1814 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1816 fputc ('\n', asm_out_file);
1817 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1819 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1820 fputc ('\n', asm_out_file);
1823 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1825 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1827 fputc ('\n', asm_out_file);
1830 /* The CIE contains a pointer to the exception region info for the
1831 frame. Make the augmentation string three bytes (including the
1832 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1833 can't handle unaligned relocs. */
1836 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1837 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1841 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1843 fputc ('\n', asm_out_file);
1845 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1847 fprintf (asm_out_file, "\t%s pointer to exception region info",
1852 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1854 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1858 fputc ('\n', asm_out_file);
1861 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1863 fputc ('\n', asm_out_file);
1864 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1866 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1868 fputc ('\n', asm_out_file);
1869 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1871 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1873 fputc ('\n', asm_out_file);
1875 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1876 output_cfi (cfi, NULL);
1878 /* Pad the CIE out to an address sized boundary. */
1879 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1880 ASM_OUTPUT_LABEL (asm_out_file, l2);
1881 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1882 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1884 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1885 fputc ('\n', asm_out_file);
1888 /* Loop through all of the FDE's. */
1889 for (i = 0; i < fde_table_in_use; ++i)
1891 fde = &fde_table[i];
1893 /* Don't emit EH unwind info for leaf functions. */
1894 if (for_eh && fde->nothrow)
1897 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1898 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1899 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1900 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1902 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1904 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1907 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1909 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1912 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1913 fputc ('\n', asm_out_file);
1914 ASM_OUTPUT_LABEL (asm_out_file, l1);
1916 /* ??? This always emits a 4 byte offset when for_eh is true, but it
1917 emits a target dependent sized offset when for_eh is not true.
1918 This inconsistency may confuse gdb. The only case where we need a
1919 non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI
1920 compatibility if we emit a 4 byte offset. We need a 4 byte offset
1921 though in order to be compatible with the dwarf_fde struct in frame.c.
1922 If the for_eh case is changed, then the struct in frame.c has
1923 to be adjusted appropriately. */
1925 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l1, "__FRAME_BEGIN__");
1927 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1929 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1931 fputc ('\n', asm_out_file);
1932 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1934 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1936 fputc ('\n', asm_out_file);
1937 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1938 fde->dw_fde_end, fde->dw_fde_begin);
1940 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1942 fputc ('\n', asm_out_file);
1944 /* Loop through the Call Frame Instructions associated with
1946 fde->dw_fde_current_label = fde->dw_fde_begin;
1947 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1948 output_cfi (cfi, fde);
1950 /* Pad the FDE out to an address sized boundary. */
1951 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1952 ASM_OUTPUT_LABEL (asm_out_file, l2);
1953 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1954 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1956 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1957 fputc ('\n', asm_out_file);
1960 #ifndef EH_FRAME_SECTION
1963 /* Emit terminating zero for table. */
1964 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1965 fputc ('\n', asm_out_file);
1968 #ifdef MIPS_DEBUGGING_INFO
1969 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1970 get a value of 0. Putting .align 0 after the label fixes it. */
1971 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1974 /* Turn off app to make assembly quicker. */
1979 /* Output a marker (i.e. a label) for the beginning of a function, before
1983 dwarf2out_begin_prologue ()
1985 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1986 register dw_fde_ref fde;
1988 ++current_funcdef_number;
1990 function_section (current_function_decl);
1991 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1992 current_funcdef_number);
1993 ASM_OUTPUT_LABEL (asm_out_file, label);
1994 current_function_func_begin_label = get_identifier (label);
1996 /* Expand the fde table if necessary. */
1997 if (fde_table_in_use == fde_table_allocated)
1999 fde_table_allocated += FDE_TABLE_INCREMENT;
2001 = (dw_fde_ref) xrealloc (fde_table,
2002 fde_table_allocated * sizeof (dw_fde_node));
2005 /* Record the FDE associated with this function. */
2006 current_funcdef_fde = fde_table_in_use;
2008 /* Add the new FDE at the end of the fde_table. */
2009 fde = &fde_table[fde_table_in_use++];
2010 fde->dw_fde_begin = xstrdup (label);
2011 fde->dw_fde_current_label = NULL;
2012 fde->dw_fde_end = NULL;
2013 fde->dw_fde_cfi = NULL;
2014 fde->nothrow = current_function_nothrow;
2016 args_size = old_args_size = 0;
2019 /* Output a marker (i.e. a label) for the absolute end of the generated code
2020 for a function definition. This gets called *after* the epilogue code has
2024 dwarf2out_end_epilogue ()
2027 char label[MAX_ARTIFICIAL_LABEL_BYTES];
2029 /* Output a label to mark the endpoint of the code generated for this
2031 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
2032 ASM_OUTPUT_LABEL (asm_out_file, label);
2033 fde = &fde_table[fde_table_in_use - 1];
2034 fde->dw_fde_end = xstrdup (label);
2038 dwarf2out_frame_init ()
2040 /* Allocate the initial hunk of the fde_table. */
2041 fde_table = (dw_fde_ref) xcalloc (FDE_TABLE_INCREMENT, sizeof (dw_fde_node));
2042 fde_table_allocated = FDE_TABLE_INCREMENT;
2043 fde_table_in_use = 0;
2045 /* Generate the CFA instructions common to all FDE's. Do it now for the
2046 sake of lookup_cfa. */
2048 #ifdef DWARF2_UNWIND_INFO
2049 /* On entry, the Canonical Frame Address is at SP. */
2050 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
2051 initial_return_save (INCOMING_RETURN_ADDR_RTX);
2056 dwarf2out_frame_finish ()
2058 /* Output call frame information. */
2059 #ifdef MIPS_DEBUGGING_INFO
2060 if (write_symbols == DWARF2_DEBUG)
2061 output_call_frame_info (0);
2062 if (flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp))
2063 output_call_frame_info (1);
2065 if (write_symbols == DWARF2_DEBUG
2066 || flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp))
2067 output_call_frame_info (1);
2071 /* And now, the subset of the debugging information support code necessary
2072 for emitting location expressions. */
2074 typedef struct dw_val_struct *dw_val_ref;
2075 typedef struct die_struct *dw_die_ref;
2076 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2078 /* Each DIE may have a series of attribute/value pairs. Values
2079 can take on several forms. The forms that are used in this
2080 implementation are listed below. */
2087 dw_val_class_unsigned_const,
2088 dw_val_class_long_long,
2091 dw_val_class_die_ref,
2092 dw_val_class_fde_ref,
2093 dw_val_class_lbl_id,
2094 dw_val_class_lbl_offset,
2099 /* Describe a double word constant value. */
2100 /* ??? Every instance of long_long in the code really means CONST_DOUBLE. */
2102 typedef struct dw_long_long_struct
2109 /* Describe a floating point constant value. */
2111 typedef struct dw_fp_struct
2118 /* The dw_val_node describes an attribute's value, as it is
2119 represented internally. */
2121 typedef struct dw_val_struct
2123 dw_val_class val_class;
2127 dw_loc_descr_ref val_loc;
2129 long unsigned val_unsigned;
2130 dw_long_long_const val_long_long;
2131 dw_float_const val_float;
2132 dw_die_ref val_die_ref;
2133 unsigned val_fde_index;
2136 unsigned char val_flag;
2142 /* Locations in memory are described using a sequence of stack machine
2145 typedef struct dw_loc_descr_struct
2147 dw_loc_descr_ref dw_loc_next;
2148 enum dwarf_location_atom dw_loc_opc;
2149 dw_val_node dw_loc_oprnd1;
2150 dw_val_node dw_loc_oprnd2;
2154 static const char *dwarf_stack_op_name PARAMS ((unsigned));
2155 static dw_loc_descr_ref new_loc_descr PARAMS ((enum dwarf_location_atom,
2158 static void add_loc_descr PARAMS ((dw_loc_descr_ref *,
2160 static unsigned long size_of_loc_descr PARAMS ((dw_loc_descr_ref));
2161 static unsigned long size_of_locs PARAMS ((dw_loc_descr_ref));
2162 static void output_loc_operands PARAMS ((dw_loc_descr_ref));
2163 static void output_loc_sequence PARAMS ((dw_loc_descr_ref));
2165 /* Convert a DWARF stack opcode into its string name. */
2168 dwarf_stack_op_name (op)
2169 register unsigned op;
2174 return "DW_OP_addr";
2176 return "DW_OP_deref";
2178 return "DW_OP_const1u";
2180 return "DW_OP_const1s";
2182 return "DW_OP_const2u";
2184 return "DW_OP_const2s";
2186 return "DW_OP_const4u";
2188 return "DW_OP_const4s";
2190 return "DW_OP_const8u";
2192 return "DW_OP_const8s";
2194 return "DW_OP_constu";
2196 return "DW_OP_consts";
2200 return "DW_OP_drop";
2202 return "DW_OP_over";
2204 return "DW_OP_pick";
2206 return "DW_OP_swap";
2210 return "DW_OP_xderef";
2218 return "DW_OP_minus";
2230 return "DW_OP_plus";
2231 case DW_OP_plus_uconst:
2232 return "DW_OP_plus_uconst";
2238 return "DW_OP_shra";
2256 return "DW_OP_skip";
2258 return "DW_OP_lit0";
2260 return "DW_OP_lit1";
2262 return "DW_OP_lit2";
2264 return "DW_OP_lit3";
2266 return "DW_OP_lit4";
2268 return "DW_OP_lit5";
2270 return "DW_OP_lit6";
2272 return "DW_OP_lit7";
2274 return "DW_OP_lit8";
2276 return "DW_OP_lit9";
2278 return "DW_OP_lit10";
2280 return "DW_OP_lit11";
2282 return "DW_OP_lit12";
2284 return "DW_OP_lit13";
2286 return "DW_OP_lit14";
2288 return "DW_OP_lit15";
2290 return "DW_OP_lit16";
2292 return "DW_OP_lit17";
2294 return "DW_OP_lit18";
2296 return "DW_OP_lit19";
2298 return "DW_OP_lit20";
2300 return "DW_OP_lit21";
2302 return "DW_OP_lit22";
2304 return "DW_OP_lit23";
2306 return "DW_OP_lit24";
2308 return "DW_OP_lit25";
2310 return "DW_OP_lit26";
2312 return "DW_OP_lit27";
2314 return "DW_OP_lit28";
2316 return "DW_OP_lit29";
2318 return "DW_OP_lit30";
2320 return "DW_OP_lit31";
2322 return "DW_OP_reg0";
2324 return "DW_OP_reg1";
2326 return "DW_OP_reg2";
2328 return "DW_OP_reg3";
2330 return "DW_OP_reg4";
2332 return "DW_OP_reg5";
2334 return "DW_OP_reg6";
2336 return "DW_OP_reg7";
2338 return "DW_OP_reg8";
2340 return "DW_OP_reg9";
2342 return "DW_OP_reg10";
2344 return "DW_OP_reg11";
2346 return "DW_OP_reg12";
2348 return "DW_OP_reg13";
2350 return "DW_OP_reg14";
2352 return "DW_OP_reg15";
2354 return "DW_OP_reg16";
2356 return "DW_OP_reg17";
2358 return "DW_OP_reg18";
2360 return "DW_OP_reg19";
2362 return "DW_OP_reg20";
2364 return "DW_OP_reg21";
2366 return "DW_OP_reg22";
2368 return "DW_OP_reg23";
2370 return "DW_OP_reg24";
2372 return "DW_OP_reg25";
2374 return "DW_OP_reg26";
2376 return "DW_OP_reg27";
2378 return "DW_OP_reg28";
2380 return "DW_OP_reg29";
2382 return "DW_OP_reg30";
2384 return "DW_OP_reg31";
2386 return "DW_OP_breg0";
2388 return "DW_OP_breg1";
2390 return "DW_OP_breg2";
2392 return "DW_OP_breg3";
2394 return "DW_OP_breg4";
2396 return "DW_OP_breg5";
2398 return "DW_OP_breg6";
2400 return "DW_OP_breg7";
2402 return "DW_OP_breg8";
2404 return "DW_OP_breg9";
2406 return "DW_OP_breg10";
2408 return "DW_OP_breg11";
2410 return "DW_OP_breg12";
2412 return "DW_OP_breg13";
2414 return "DW_OP_breg14";
2416 return "DW_OP_breg15";
2418 return "DW_OP_breg16";
2420 return "DW_OP_breg17";
2422 return "DW_OP_breg18";
2424 return "DW_OP_breg19";
2426 return "DW_OP_breg20";
2428 return "DW_OP_breg21";
2430 return "DW_OP_breg22";
2432 return "DW_OP_breg23";
2434 return "DW_OP_breg24";
2436 return "DW_OP_breg25";
2438 return "DW_OP_breg26";
2440 return "DW_OP_breg27";
2442 return "DW_OP_breg28";
2444 return "DW_OP_breg29";
2446 return "DW_OP_breg30";
2448 return "DW_OP_breg31";
2450 return "DW_OP_regx";
2452 return "DW_OP_fbreg";
2454 return "DW_OP_bregx";
2456 return "DW_OP_piece";
2457 case DW_OP_deref_size:
2458 return "DW_OP_deref_size";
2459 case DW_OP_xderef_size:
2460 return "DW_OP_xderef_size";
2464 return "OP_<unknown>";
2469 /* Return a pointer to a newly allocated location description. Location
2470 descriptions are simple expression terms that can be strung
2471 together to form more complicated location (address) descriptions. */
2473 static inline dw_loc_descr_ref
2474 new_loc_descr (op, oprnd1, oprnd2)
2475 register enum dwarf_location_atom op;
2476 register unsigned long oprnd1;
2477 register unsigned long oprnd2;
2479 register dw_loc_descr_ref descr
2480 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
2482 descr->dw_loc_next = NULL;
2483 descr->dw_loc_opc = op;
2484 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
2485 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
2486 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
2487 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
2492 /* Add a location description term to a location description expression. */
2495 add_loc_descr (list_head, descr)
2496 register dw_loc_descr_ref *list_head;
2497 register dw_loc_descr_ref descr;
2499 register dw_loc_descr_ref *d;
2501 /* Find the end of the chain. */
2502 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
2508 /* Return the size of a location descriptor. */
2510 static unsigned long
2511 size_of_loc_descr (loc)
2512 register dw_loc_descr_ref loc;
2514 register unsigned long size = 1;
2516 switch (loc->dw_loc_opc)
2519 size += DWARF2_ADDR_SIZE;
2538 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2541 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2546 case DW_OP_plus_uconst:
2547 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2585 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2588 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2591 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2594 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2595 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
2598 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2600 case DW_OP_deref_size:
2601 case DW_OP_xderef_size:
2611 /* Return the size of a series of location descriptors. */
2613 static unsigned long
2615 register dw_loc_descr_ref loc;
2617 register unsigned long size = 0;
2619 for (; loc != NULL; loc = loc->dw_loc_next)
2620 size += size_of_loc_descr (loc);
2625 /* Output location description stack opcode's operands (if any). */
2628 output_loc_operands (loc)
2629 register dw_loc_descr_ref loc;
2631 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
2632 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
2634 switch (loc->dw_loc_opc)
2636 #ifdef DWARF2_DEBUGGING_INFO
2638 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
2639 fputc ('\n', asm_out_file);
2643 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
2644 fputc ('\n', asm_out_file);
2648 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
2649 fputc ('\n', asm_out_file);
2654 fputc ('\n', asm_out_file);
2658 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
2659 fputc ('\n', asm_out_file);
2671 /* We currently don't make any attempt to make sure these are
2672 aligned properly like we do for the main unwind info, so
2673 don't support emitting things larger than a byte if we're
2674 only doing unwinding. */
2679 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
2680 fputc ('\n', asm_out_file);
2683 output_uleb128 (val1->v.val_unsigned);
2684 fputc ('\n', asm_out_file);
2687 output_sleb128 (val1->v.val_int);
2688 fputc ('\n', asm_out_file);
2691 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
2692 fputc ('\n', asm_out_file);
2694 case DW_OP_plus_uconst:
2695 output_uleb128 (val1->v.val_unsigned);
2696 fputc ('\n', asm_out_file);
2730 output_sleb128 (val1->v.val_int);
2731 fputc ('\n', asm_out_file);
2734 output_uleb128 (val1->v.val_unsigned);
2735 fputc ('\n', asm_out_file);
2738 output_sleb128 (val1->v.val_int);
2739 fputc ('\n', asm_out_file);
2742 output_uleb128 (val1->v.val_unsigned);
2743 fputc ('\n', asm_out_file);
2744 output_sleb128 (val2->v.val_int);
2745 fputc ('\n', asm_out_file);
2748 output_uleb128 (val1->v.val_unsigned);
2749 fputc ('\n', asm_out_file);
2751 case DW_OP_deref_size:
2752 case DW_OP_xderef_size:
2753 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
2754 fputc ('\n', asm_out_file);
2757 /* Other codes have no operands. */
2762 /* Output a sequence of location operations. */
2765 output_loc_sequence (loc)
2766 dw_loc_descr_ref loc;
2768 for (; loc != NULL; loc = loc->dw_loc_next)
2770 /* Output the opcode. */
2771 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
2773 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
2774 dwarf_stack_op_name (loc->dw_loc_opc));
2776 fputc ('\n', asm_out_file);
2778 /* Output the operand(s) (if any). */
2779 output_loc_operands (loc);
2783 /* This routine will generate the correct assembly data for a location
2784 description based on a cfi entry with a complex address. */
2787 output_cfa_loc (cfi)
2790 dw_loc_descr_ref loc;
2793 /* Output the size of the block. */
2794 loc = cfi->dw_cfi_oprnd1.dw_cfi_loc;
2795 size = size_of_locs (loc);
2796 output_uleb128 (size);
2797 fputc ('\n', asm_out_file);
2799 /* Now output the operations themselves. */
2800 output_loc_sequence (loc);
2803 /* This function builds a dwarf location descriptor seqeunce from
2804 a dw_cfa_location. */
2806 static struct dw_loc_descr_struct *
2808 dw_cfa_location *cfa;
2810 struct dw_loc_descr_struct *head, *tmp;
2812 if (cfa->indirect == 0)
2815 if (cfa->base_offset)
2816 head = new_loc_descr (DW_OP_breg0 + cfa->reg, cfa->base_offset, 0);
2818 head = new_loc_descr (DW_OP_reg0 + cfa->reg, 0, 0);
2819 head->dw_loc_oprnd1.val_class = dw_val_class_const;
2820 tmp = new_loc_descr (DW_OP_deref, 0, 0);
2821 add_loc_descr (&head, tmp);
2822 if (cfa->offset != 0)
2824 tmp = new_loc_descr (DW_OP_plus_uconst, cfa->offset, 0);
2825 add_loc_descr (&head, tmp);
2830 /* This function fills in aa dw_cfa_location structure from a
2831 dwarf location descriptor sequence. */
2834 get_cfa_from_loc_descr (cfa, loc)
2835 dw_cfa_location *cfa;
2836 struct dw_loc_descr_struct * loc;
2838 struct dw_loc_descr_struct * ptr;
2840 cfa->base_offset = 0;
2844 for (ptr = loc; ptr != NULL; ptr = ptr->dw_loc_next)
2846 enum dwarf_location_atom op = ptr->dw_loc_opc;
2881 cfa->reg = op - DW_OP_reg0;
2884 cfa->reg = ptr->dw_loc_oprnd1.v.val_int;
2918 cfa->reg = op - DW_OP_breg0;
2919 cfa->base_offset = ptr->dw_loc_oprnd1.v.val_int;
2922 cfa->reg = ptr->dw_loc_oprnd1.v.val_int;
2923 cfa->base_offset = ptr->dw_loc_oprnd2.v.val_int;
2928 case DW_OP_plus_uconst:
2929 cfa->offset = ptr->dw_loc_oprnd1.v.val_unsigned;
2932 fatal ("DW_LOC_OP %s not implememnted yet.\n",
2933 dwarf_stack_op_name (ptr->dw_loc_opc));
2937 #endif /* .debug_frame support */
2939 /* And now, the support for symbolic debugging information. */
2940 #ifdef DWARF2_DEBUGGING_INFO
2942 /* NOTE: In the comments in this file, many references are made to
2943 "Debugging Information Entries". This term is abbreviated as `DIE'
2944 throughout the remainder of this file. */
2946 /* An internal representation of the DWARF output is built, and then
2947 walked to generate the DWARF debugging info. The walk of the internal
2948 representation is done after the entire program has been compiled.
2949 The types below are used to describe the internal representation. */
2951 /* Various DIE's use offsets relative to the beginning of the
2952 .debug_info section to refer to each other. */
2954 typedef long int dw_offset;
2956 /* Define typedefs here to avoid circular dependencies. */
2958 typedef struct dw_attr_struct *dw_attr_ref;
2959 typedef struct dw_line_info_struct *dw_line_info_ref;
2960 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2961 typedef struct pubname_struct *pubname_ref;
2962 typedef dw_die_ref *arange_ref;
2964 /* Each entry in the line_info_table maintains the file and
2965 line number associated with the label generated for that
2966 entry. The label gives the PC value associated with
2967 the line number entry. */
2969 typedef struct dw_line_info_struct
2971 unsigned long dw_file_num;
2972 unsigned long dw_line_num;
2976 /* Line information for functions in separate sections; each one gets its
2978 typedef struct dw_separate_line_info_struct
2980 unsigned long dw_file_num;
2981 unsigned long dw_line_num;
2982 unsigned long function;
2984 dw_separate_line_info_entry;
2986 /* Each DIE attribute has a field specifying the attribute kind,
2987 a link to the next attribute in the chain, and an attribute value.
2988 Attributes are typically linked below the DIE they modify. */
2990 typedef struct dw_attr_struct
2992 enum dwarf_attribute dw_attr;
2993 dw_attr_ref dw_attr_next;
2994 dw_val_node dw_attr_val;
2998 /* The Debugging Information Entry (DIE) structure */
3000 typedef struct die_struct
3002 enum dwarf_tag die_tag;
3003 dw_attr_ref die_attr;
3004 dw_die_ref die_parent;
3005 dw_die_ref die_child;
3007 dw_offset die_offset;
3008 unsigned long die_abbrev;
3012 /* The pubname structure */
3014 typedef struct pubname_struct
3021 /* The limbo die list structure. */
3022 typedef struct limbo_die_struct
3025 struct limbo_die_struct *next;
3029 /* How to start an assembler comment. */
3030 #ifndef ASM_COMMENT_START
3031 #define ASM_COMMENT_START ";#"
3034 /* Define a macro which returns non-zero for a TYPE_DECL which was
3035 implicitly generated for a tagged type.
3037 Note that unlike the gcc front end (which generates a NULL named
3038 TYPE_DECL node for each complete tagged type, each array type, and
3039 each function type node created) the g++ front end generates a
3040 _named_ TYPE_DECL node for each tagged type node created.
3041 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
3042 generate a DW_TAG_typedef DIE for them. */
3044 #define TYPE_DECL_IS_STUB(decl) \
3045 (DECL_NAME (decl) == NULL_TREE \
3046 || (DECL_ARTIFICIAL (decl) \
3047 && is_tagged_type (TREE_TYPE (decl)) \
3048 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
3049 /* This is necessary for stub decls that \
3050 appear in nested inline functions. */ \
3051 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
3052 && (decl_ultimate_origin (decl) \
3053 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
3055 /* Information concerning the compilation unit's programming
3056 language, and compiler version. */
3058 extern int flag_traditional;
3060 /* Fixed size portion of the DWARF compilation unit header. */
3061 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
3063 /* Fixed size portion of debugging line information prolog. */
3064 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
3066 /* Fixed size portion of public names info. */
3067 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
3069 /* Fixed size portion of the address range info. */
3070 #define DWARF_ARANGES_HEADER_SIZE \
3071 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \
3072 - DWARF_OFFSET_SIZE)
3074 /* Size of padding portion in the address range info. It must be
3075 aligned to twice the pointer size. */
3076 #define DWARF_ARANGES_PAD_SIZE \
3077 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \
3078 - (2 * DWARF_OFFSET_SIZE + 4))
3080 /* The default is to have gcc emit the line number tables. */
3081 #ifndef DWARF2_ASM_LINE_DEBUG_INFO
3082 #define DWARF2_ASM_LINE_DEBUG_INFO 0
3085 /* Define the architecture-dependent minimum instruction length (in bytes).
3086 In this implementation of DWARF, this field is used for information
3087 purposes only. Since GCC generates assembly language, we have
3088 no a priori knowledge of how many instruction bytes are generated
3089 for each source line, and therefore can use only the DW_LNE_set_address
3090 and DW_LNS_fixed_advance_pc line information commands. */
3092 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
3093 #define DWARF_LINE_MIN_INSTR_LENGTH 4
3096 /* Minimum line offset in a special line info. opcode.
3097 This value was chosen to give a reasonable range of values. */
3098 #define DWARF_LINE_BASE -10
3100 /* First special line opcde - leave room for the standard opcodes. */
3101 #define DWARF_LINE_OPCODE_BASE 10
3103 /* Range of line offsets in a special line info. opcode. */
3104 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
3106 /* Flag that indicates the initial value of the is_stmt_start flag.
3107 In the present implementation, we do not mark any lines as
3108 the beginning of a source statement, because that information
3109 is not made available by the GCC front-end. */
3110 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
3112 /* This location is used by calc_die_sizes() to keep track
3113 the offset of each DIE within the .debug_info section. */
3114 static unsigned long next_die_offset;
3116 /* Record the root of the DIE's built for the current compilation unit. */
3117 static dw_die_ref comp_unit_die;
3119 /* A list of DIEs with a NULL parent waiting to be relocated. */
3120 static limbo_die_node *limbo_die_list = 0;
3122 /* Pointer to an array of filenames referenced by this compilation unit. */
3123 static char **file_table;
3125 /* Total number of entries in the table (i.e. array) pointed to by
3126 `file_table'. This is the *total* and includes both used and unused
3128 static unsigned file_table_allocated;
3130 /* Number of entries in the file_table which are actually in use. */
3131 static unsigned file_table_in_use;
3133 /* Size (in elements) of increments by which we may expand the filename
3135 #define FILE_TABLE_INCREMENT 64
3137 /* Local pointer to the name of the main input file. Initialized in
3139 static const char *primary_filename;
3141 /* A pointer to the base of a table of references to DIE's that describe
3142 declarations. The table is indexed by DECL_UID() which is a unique
3143 number identifying each decl. */
3144 static dw_die_ref *decl_die_table;
3146 /* Number of elements currently allocated for the decl_die_table. */
3147 static unsigned decl_die_table_allocated;
3149 /* Number of elements in decl_die_table currently in use. */
3150 static unsigned decl_die_table_in_use;
3152 /* Size (in elements) of increments by which we may expand the
3154 #define DECL_DIE_TABLE_INCREMENT 256
3156 /* A pointer to the base of a table of references to declaration
3157 scopes. This table is a display which tracks the nesting
3158 of declaration scopes at the current scope and containing
3159 scopes. This table is used to find the proper place to
3160 define type declaration DIE's. */
3161 static tree *decl_scope_table;
3163 /* Number of elements currently allocated for the decl_scope_table. */
3164 static int decl_scope_table_allocated;
3166 /* Current level of nesting of declaration scopes. */
3167 static int decl_scope_depth;
3169 /* Size (in elements) of increments by which we may expand the
3170 decl_scope_table. */
3171 #define DECL_SCOPE_TABLE_INCREMENT 64
3173 /* A pointer to the base of a list of references to DIE's that
3174 are uniquely identified by their tag, presence/absence of
3175 children DIE's, and list of attribute/value pairs. */
3176 static dw_die_ref *abbrev_die_table;
3178 /* Number of elements currently allocated for abbrev_die_table. */
3179 static unsigned abbrev_die_table_allocated;
3181 /* Number of elements in type_die_table currently in use. */
3182 static unsigned abbrev_die_table_in_use;
3184 /* Size (in elements) of increments by which we may expand the
3185 abbrev_die_table. */
3186 #define ABBREV_DIE_TABLE_INCREMENT 256
3188 /* A pointer to the base of a table that contains line information
3189 for each source code line in .text in the compilation unit. */
3190 static dw_line_info_ref line_info_table;
3192 /* Number of elements currently allocated for line_info_table. */
3193 static unsigned line_info_table_allocated;
3195 /* Number of elements in separate_line_info_table currently in use. */
3196 static unsigned separate_line_info_table_in_use;
3198 /* A pointer to the base of a table that contains line information
3199 for each source code line outside of .text in the compilation unit. */
3200 static dw_separate_line_info_ref separate_line_info_table;
3202 /* Number of elements currently allocated for separate_line_info_table. */
3203 static unsigned separate_line_info_table_allocated;
3205 /* Number of elements in line_info_table currently in use. */
3206 static unsigned line_info_table_in_use;
3208 /* Size (in elements) of increments by which we may expand the
3210 #define LINE_INFO_TABLE_INCREMENT 1024
3212 /* A pointer to the base of a table that contains a list of publicly
3213 accessible names. */
3214 static pubname_ref pubname_table;
3216 /* Number of elements currently allocated for pubname_table. */
3217 static unsigned pubname_table_allocated;
3219 /* Number of elements in pubname_table currently in use. */
3220 static unsigned pubname_table_in_use;
3222 /* Size (in elements) of increments by which we may expand the
3224 #define PUBNAME_TABLE_INCREMENT 64
3226 /* A pointer to the base of a table that contains a list of publicly
3227 accessible names. */
3228 static arange_ref arange_table;
3230 /* Number of elements currently allocated for arange_table. */
3231 static unsigned arange_table_allocated;
3233 /* Number of elements in arange_table currently in use. */
3234 static unsigned arange_table_in_use;
3236 /* Size (in elements) of increments by which we may expand the
3238 #define ARANGE_TABLE_INCREMENT 64
3240 /* A pointer to the base of a list of incomplete types which might be
3241 completed at some later time. */
3243 static tree *incomplete_types_list;
3245 /* Number of elements currently allocated for the incomplete_types_list. */
3246 static unsigned incomplete_types_allocated;
3248 /* Number of elements of incomplete_types_list currently in use. */
3249 static unsigned incomplete_types;
3251 /* Size (in elements) of increments by which we may expand the incomplete
3252 types list. Actually, a single hunk of space of this size should
3253 be enough for most typical programs. */
3254 #define INCOMPLETE_TYPES_INCREMENT 64
3256 /* Record whether the function being analyzed contains inlined functions. */
3257 static int current_function_has_inlines;
3258 #if 0 && defined (MIPS_DEBUGGING_INFO)
3259 static int comp_unit_has_inlines;
3262 /* Array of RTXes referenced by the debugging information, which therefore
3263 must be kept around forever. We do this rather than perform GC on
3264 the dwarf info because almost all of the dwarf info lives forever, and
3265 it's easier to support non-GC frontends this way. */
3266 static varray_type used_rtx_varray;
3268 /* Forward declarations for functions defined in this file. */
3270 static int is_pseudo_reg PARAMS ((rtx));
3271 static tree type_main_variant PARAMS ((tree));
3272 static int is_tagged_type PARAMS ((tree));
3273 static const char *dwarf_tag_name PARAMS ((unsigned));
3274 static const char *dwarf_attr_name PARAMS ((unsigned));
3275 static const char *dwarf_form_name PARAMS ((unsigned));
3277 static const char *dwarf_type_encoding_name PARAMS ((unsigned));
3279 static tree decl_ultimate_origin PARAMS ((tree));
3280 static tree block_ultimate_origin PARAMS ((tree));
3281 static tree decl_class_context PARAMS ((tree));
3282 static void add_dwarf_attr PARAMS ((dw_die_ref, dw_attr_ref));
3283 static void add_AT_flag PARAMS ((dw_die_ref,
3284 enum dwarf_attribute,
3286 static void add_AT_int PARAMS ((dw_die_ref,
3287 enum dwarf_attribute, long));
3288 static void add_AT_unsigned PARAMS ((dw_die_ref,
3289 enum dwarf_attribute,
3291 static void add_AT_long_long PARAMS ((dw_die_ref,
3292 enum dwarf_attribute,
3295 static void add_AT_float PARAMS ((dw_die_ref,
3296 enum dwarf_attribute,
3298 static void add_AT_string PARAMS ((dw_die_ref,
3299 enum dwarf_attribute,
3301 static void add_AT_die_ref PARAMS ((dw_die_ref,
3302 enum dwarf_attribute,
3304 static void add_AT_fde_ref PARAMS ((dw_die_ref,
3305 enum dwarf_attribute,
3307 static void add_AT_loc PARAMS ((dw_die_ref,
3308 enum dwarf_attribute,
3310 static void add_AT_addr PARAMS ((dw_die_ref,
3311 enum dwarf_attribute,
3313 static void add_AT_lbl_id PARAMS ((dw_die_ref,
3314 enum dwarf_attribute,
3316 static void add_AT_lbl_offset PARAMS ((dw_die_ref,
3317 enum dwarf_attribute,
3319 static dw_attr_ref get_AT PARAMS ((dw_die_ref,
3320 enum dwarf_attribute));
3321 static const char *get_AT_low_pc PARAMS ((dw_die_ref));
3322 static const char *get_AT_hi_pc PARAMS ((dw_die_ref));
3323 static const char *get_AT_string PARAMS ((dw_die_ref,
3324 enum dwarf_attribute));
3325 static int get_AT_flag PARAMS ((dw_die_ref,
3326 enum dwarf_attribute));
3327 static unsigned get_AT_unsigned PARAMS ((dw_die_ref,
3328 enum dwarf_attribute));
3329 static inline dw_die_ref get_AT_ref PARAMS ((dw_die_ref,
3330 enum dwarf_attribute));
3331 static int is_c_family PARAMS ((void));
3332 static int is_fortran PARAMS ((void));
3333 static void remove_AT PARAMS ((dw_die_ref,
3334 enum dwarf_attribute));
3335 static void remove_children PARAMS ((dw_die_ref));
3336 static void add_child_die PARAMS ((dw_die_ref, dw_die_ref));
3337 static dw_die_ref new_die PARAMS ((enum dwarf_tag, dw_die_ref));
3338 static dw_die_ref lookup_type_die PARAMS ((tree));
3339 static void equate_type_number_to_die PARAMS ((tree, dw_die_ref));
3340 static dw_die_ref lookup_decl_die PARAMS ((tree));
3341 static void equate_decl_number_to_die PARAMS ((tree, dw_die_ref));
3342 static void print_spaces PARAMS ((FILE *));
3343 static void print_die PARAMS ((dw_die_ref, FILE *));
3344 static void print_dwarf_line_table PARAMS ((FILE *));
3345 static void add_sibling_attributes PARAMS ((dw_die_ref));
3346 static void build_abbrev_table PARAMS ((dw_die_ref));
3347 static unsigned long size_of_string PARAMS ((const char *));
3348 static int constant_size PARAMS ((long unsigned));
3349 static unsigned long size_of_die PARAMS ((dw_die_ref));
3350 static void calc_die_sizes PARAMS ((dw_die_ref));
3351 static unsigned long size_of_line_prolog PARAMS ((void));
3352 static unsigned long size_of_pubnames PARAMS ((void));
3353 static unsigned long size_of_aranges PARAMS ((void));
3354 static enum dwarf_form value_format PARAMS ((dw_attr_ref));
3355 static void output_value_format PARAMS ((dw_attr_ref));
3356 static void output_abbrev_section PARAMS ((void));
3357 static void output_die PARAMS ((dw_die_ref));
3358 static void output_compilation_unit_header PARAMS ((void));
3359 static const char *dwarf2_name PARAMS ((tree, int));
3360 static void add_pubname PARAMS ((tree, dw_die_ref));
3361 static void output_pubnames PARAMS ((void));
3362 static void add_arange PARAMS ((tree, dw_die_ref));
3363 static void output_aranges PARAMS ((void));
3364 static void output_line_info PARAMS ((void));
3365 static dw_die_ref base_type_die PARAMS ((tree));
3366 static tree root_type PARAMS ((tree));
3367 static int is_base_type PARAMS ((tree));
3368 static dw_die_ref modified_type_die PARAMS ((tree, int, int, dw_die_ref));
3369 static int type_is_enum PARAMS ((tree));
3370 static unsigned int reg_number PARAMS ((rtx));
3371 static dw_loc_descr_ref reg_loc_descriptor PARAMS ((rtx));
3372 static dw_loc_descr_ref based_loc_descr PARAMS ((unsigned, long));
3373 static int is_based_loc PARAMS ((rtx));
3374 static dw_loc_descr_ref mem_loc_descriptor PARAMS ((rtx, enum machine_mode mode));
3375 static dw_loc_descr_ref concat_loc_descriptor PARAMS ((rtx, rtx));
3376 static dw_loc_descr_ref loc_descriptor PARAMS ((rtx));
3377 static HOST_WIDE_INT ceiling PARAMS ((HOST_WIDE_INT, unsigned int));
3378 static tree field_type PARAMS ((tree));
3379 static unsigned int simple_type_align_in_bits PARAMS ((tree));
3380 static unsigned HOST_WIDE_INT simple_type_size_in_bits PARAMS ((tree));
3381 static HOST_WIDE_INT field_byte_offset PARAMS ((tree));
3382 static void add_AT_location_description PARAMS ((dw_die_ref,
3383 enum dwarf_attribute, rtx));
3384 static void add_data_member_location_attribute PARAMS ((dw_die_ref, tree));
3385 static void add_const_value_attribute PARAMS ((dw_die_ref, rtx));
3386 static void add_location_or_const_value_attribute PARAMS ((dw_die_ref, tree));
3387 static void add_name_attribute PARAMS ((dw_die_ref, const char *));
3388 static void add_bound_info PARAMS ((dw_die_ref,
3389 enum dwarf_attribute, tree));
3390 static void add_subscript_info PARAMS ((dw_die_ref, tree));
3391 static void add_byte_size_attribute PARAMS ((dw_die_ref, tree));
3392 static void add_bit_offset_attribute PARAMS ((dw_die_ref, tree));
3393 static void add_bit_size_attribute PARAMS ((dw_die_ref, tree));
3394 static void add_prototyped_attribute PARAMS ((dw_die_ref, tree));
3395 static void add_abstract_origin_attribute PARAMS ((dw_die_ref, tree));
3396 static void add_pure_or_virtual_attribute PARAMS ((dw_die_ref, tree));
3397 static void add_src_coords_attributes PARAMS ((dw_die_ref, tree));
3398 static void add_name_and_src_coords_attributes PARAMS ((dw_die_ref, tree));
3399 static void push_decl_scope PARAMS ((tree));
3400 static dw_die_ref scope_die_for PARAMS ((tree, dw_die_ref));
3401 static void pop_decl_scope PARAMS ((void));
3402 static void add_type_attribute PARAMS ((dw_die_ref, tree, int, int,
3404 static const char *type_tag PARAMS ((tree));
3405 static tree member_declared_type PARAMS ((tree));
3407 static const char *decl_start_label PARAMS ((tree));
3409 static void gen_array_type_die PARAMS ((tree, dw_die_ref));
3410 static void gen_set_type_die PARAMS ((tree, dw_die_ref));
3412 static void gen_entry_point_die PARAMS ((tree, dw_die_ref));
3414 static void gen_inlined_enumeration_type_die PARAMS ((tree, dw_die_ref));
3415 static void gen_inlined_structure_type_die PARAMS ((tree, dw_die_ref));
3416 static void gen_inlined_union_type_die PARAMS ((tree, dw_die_ref));
3417 static void gen_enumeration_type_die PARAMS ((tree, dw_die_ref));
3418 static dw_die_ref gen_formal_parameter_die PARAMS ((tree, dw_die_ref));
3419 static void gen_unspecified_parameters_die PARAMS ((tree, dw_die_ref));
3420 static void gen_formal_types_die PARAMS ((tree, dw_die_ref));
3421 static void gen_subprogram_die PARAMS ((tree, dw_die_ref));
3422 static void gen_variable_die PARAMS ((tree, dw_die_ref));
3423 static void gen_label_die PARAMS ((tree, dw_die_ref));
3424 static void gen_lexical_block_die PARAMS ((tree, dw_die_ref, int));
3425 static void gen_inlined_subroutine_die PARAMS ((tree, dw_die_ref, int));
3426 static void gen_field_die PARAMS ((tree, dw_die_ref));
3427 static void gen_ptr_to_mbr_type_die PARAMS ((tree, dw_die_ref));
3428 static dw_die_ref gen_compile_unit_die PARAMS ((const char *));
3429 static void gen_string_type_die PARAMS ((tree, dw_die_ref));
3430 static void gen_inheritance_die PARAMS ((tree, dw_die_ref));
3431 static void gen_member_die PARAMS ((tree, dw_die_ref));
3432 static void gen_struct_or_union_type_die PARAMS ((tree, dw_die_ref));
3433 static void gen_subroutine_type_die PARAMS ((tree, dw_die_ref));
3434 static void gen_typedef_die PARAMS ((tree, dw_die_ref));
3435 static void gen_type_die PARAMS ((tree, dw_die_ref));
3436 static void gen_tagged_type_instantiation_die PARAMS ((tree, dw_die_ref));
3437 static void gen_block_die PARAMS ((tree, dw_die_ref, int));
3438 static void decls_for_scope PARAMS ((tree, dw_die_ref, int));
3439 static int is_redundant_typedef PARAMS ((tree));
3440 static void gen_decl_die PARAMS ((tree, dw_die_ref));
3441 static unsigned lookup_filename PARAMS ((const char *));
3442 static void add_incomplete_type PARAMS ((tree));
3443 static void retry_incomplete_types PARAMS ((void));
3444 static void gen_type_die_for_member PARAMS ((tree, tree, dw_die_ref));
3445 static void gen_abstract_function PARAMS ((tree));
3446 static rtx save_rtx PARAMS ((rtx));
3447 static void splice_child_die PARAMS ((dw_die_ref, dw_die_ref));
3448 static void reverse_die_lists PARAMS ((dw_die_ref));
3450 /* Section names used to hold DWARF debugging information. */
3451 #ifndef DEBUG_INFO_SECTION
3452 #define DEBUG_INFO_SECTION ".debug_info"
3454 #ifndef ABBREV_SECTION
3455 #define ABBREV_SECTION ".debug_abbrev"
3457 #ifndef ARANGES_SECTION
3458 #define ARANGES_SECTION ".debug_aranges"
3460 #ifndef DW_MACINFO_SECTION
3461 #define DW_MACINFO_SECTION ".debug_macinfo"
3463 #ifndef DEBUG_LINE_SECTION
3464 #define DEBUG_LINE_SECTION ".debug_line"
3467 #define LOC_SECTION ".debug_loc"
3469 #ifndef PUBNAMES_SECTION
3470 #define PUBNAMES_SECTION ".debug_pubnames"
3473 #define STR_SECTION ".debug_str"
3476 /* Standard ELF section names for compiled code and data. */
3477 #ifndef TEXT_SECTION
3478 #define TEXT_SECTION ".text"
3480 #ifndef DATA_SECTION
3481 #define DATA_SECTION ".data"
3484 #define BSS_SECTION ".bss"
3487 /* Labels we insert at beginning sections we can reference instead of
3488 the section names themselves. */
3490 #ifndef TEXT_SECTION_LABEL
3491 #define TEXT_SECTION_LABEL "Ltext"
3493 #ifndef DEBUG_LINE_SECTION_LABEL
3494 #define DEBUG_LINE_SECTION_LABEL "Ldebug_line"
3496 #ifndef DEBUG_INFO_SECTION_LABEL
3497 #define DEBUG_INFO_SECTION_LABEL "Ldebug_info"
3499 #ifndef ABBREV_SECTION_LABEL
3500 #define ABBREV_SECTION_LABEL "Ldebug_abbrev"
3504 /* Definitions of defaults for formats and names of various special
3505 (artificial) labels which may be generated within this file (when the -g
3506 options is used and DWARF_DEBUGGING_INFO is in effect.
3507 If necessary, these may be overridden from within the tm.h file, but
3508 typically, overriding these defaults is unnecessary. */
3510 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3511 static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3512 static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3513 static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3514 static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3516 #ifndef TEXT_END_LABEL
3517 #define TEXT_END_LABEL "Letext"
3519 #ifndef DATA_END_LABEL
3520 #define DATA_END_LABEL "Ledata"
3522 #ifndef BSS_END_LABEL
3523 #define BSS_END_LABEL "Lebss"
3525 #ifndef INSN_LABEL_FMT
3526 #define INSN_LABEL_FMT "LI%u_"
3528 #ifndef BLOCK_BEGIN_LABEL
3529 #define BLOCK_BEGIN_LABEL "LBB"
3531 #ifndef BLOCK_END_LABEL
3532 #define BLOCK_END_LABEL "LBE"
3534 #ifndef BODY_BEGIN_LABEL
3535 #define BODY_BEGIN_LABEL "Lbb"
3537 #ifndef BODY_END_LABEL
3538 #define BODY_END_LABEL "Lbe"
3540 #ifndef LINE_CODE_LABEL
3541 #define LINE_CODE_LABEL "LM"
3543 #ifndef SEPARATE_LINE_CODE_LABEL
3544 #define SEPARATE_LINE_CODE_LABEL "LSM"
3547 /* We allow a language front-end to designate a function that is to be
3548 called to "demangle" any name before it it put into a DIE. */
3550 static const char *(*demangle_name_func) PARAMS ((const char *));
3553 dwarf2out_set_demangle_name_func (func)
3554 const char *(*func) PARAMS ((const char *));
3556 demangle_name_func = func;
3559 /* Return an rtx like ORIG which lives forever. If we're doing GC,
3560 that means adding it to used_rtx_varray. If not, that means making
3561 a copy on the permanent_obstack. */
3568 VARRAY_PUSH_RTX (used_rtx_varray, orig);
3571 push_obstacks_nochange ();
3572 end_temporary_allocation ();
3573 orig = copy_rtx (orig);
3580 /* Test if rtl node points to a pseudo register. */
3586 return ((GET_CODE (rtl) == REG && REGNO (rtl) >= FIRST_PSEUDO_REGISTER)
3587 || (GET_CODE (rtl) == SUBREG
3588 && REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER));
3591 /* Return a reference to a type, with its const and volatile qualifiers
3595 type_main_variant (type)
3598 type = TYPE_MAIN_VARIANT (type);
3600 /* There really should be only one main variant among any group of variants
3601 of a given type (and all of the MAIN_VARIANT values for all members of
3602 the group should point to that one type) but sometimes the C front-end
3603 messes this up for array types, so we work around that bug here. */
3605 if (TREE_CODE (type) == ARRAY_TYPE)
3606 while (type != TYPE_MAIN_VARIANT (type))
3607 type = TYPE_MAIN_VARIANT (type);
3612 /* Return non-zero if the given type node represents a tagged type. */
3615 is_tagged_type (type)
3618 register enum tree_code code = TREE_CODE (type);
3620 return (code == RECORD_TYPE || code == UNION_TYPE
3621 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
3624 /* Convert a DIE tag into its string name. */
3627 dwarf_tag_name (tag)
3628 register unsigned tag;
3632 case DW_TAG_padding:
3633 return "DW_TAG_padding";
3634 case DW_TAG_array_type:
3635 return "DW_TAG_array_type";
3636 case DW_TAG_class_type:
3637 return "DW_TAG_class_type";
3638 case DW_TAG_entry_point:
3639 return "DW_TAG_entry_point";
3640 case DW_TAG_enumeration_type:
3641 return "DW_TAG_enumeration_type";
3642 case DW_TAG_formal_parameter:
3643 return "DW_TAG_formal_parameter";
3644 case DW_TAG_imported_declaration:
3645 return "DW_TAG_imported_declaration";
3647 return "DW_TAG_label";
3648 case DW_TAG_lexical_block:
3649 return "DW_TAG_lexical_block";
3651 return "DW_TAG_member";
3652 case DW_TAG_pointer_type:
3653 return "DW_TAG_pointer_type";
3654 case DW_TAG_reference_type:
3655 return "DW_TAG_reference_type";
3656 case DW_TAG_compile_unit:
3657 return "DW_TAG_compile_unit";
3658 case DW_TAG_string_type:
3659 return "DW_TAG_string_type";
3660 case DW_TAG_structure_type:
3661 return "DW_TAG_structure_type";
3662 case DW_TAG_subroutine_type:
3663 return "DW_TAG_subroutine_type";
3664 case DW_TAG_typedef:
3665 return "DW_TAG_typedef";
3666 case DW_TAG_union_type:
3667 return "DW_TAG_union_type";
3668 case DW_TAG_unspecified_parameters:
3669 return "DW_TAG_unspecified_parameters";
3670 case DW_TAG_variant:
3671 return "DW_TAG_variant";
3672 case DW_TAG_common_block:
3673 return "DW_TAG_common_block";
3674 case DW_TAG_common_inclusion:
3675 return "DW_TAG_common_inclusion";
3676 case DW_TAG_inheritance:
3677 return "DW_TAG_inheritance";
3678 case DW_TAG_inlined_subroutine:
3679 return "DW_TAG_inlined_subroutine";
3681 return "DW_TAG_module";
3682 case DW_TAG_ptr_to_member_type:
3683 return "DW_TAG_ptr_to_member_type";
3684 case DW_TAG_set_type:
3685 return "DW_TAG_set_type";
3686 case DW_TAG_subrange_type:
3687 return "DW_TAG_subrange_type";
3688 case DW_TAG_with_stmt:
3689 return "DW_TAG_with_stmt";
3690 case DW_TAG_access_declaration:
3691 return "DW_TAG_access_declaration";
3692 case DW_TAG_base_type:
3693 return "DW_TAG_base_type";
3694 case DW_TAG_catch_block:
3695 return "DW_TAG_catch_block";
3696 case DW_TAG_const_type:
3697 return "DW_TAG_const_type";
3698 case DW_TAG_constant:
3699 return "DW_TAG_constant";
3700 case DW_TAG_enumerator:
3701 return "DW_TAG_enumerator";
3702 case DW_TAG_file_type:
3703 return "DW_TAG_file_type";
3705 return "DW_TAG_friend";
3706 case DW_TAG_namelist:
3707 return "DW_TAG_namelist";
3708 case DW_TAG_namelist_item:
3709 return "DW_TAG_namelist_item";
3710 case DW_TAG_packed_type:
3711 return "DW_TAG_packed_type";
3712 case DW_TAG_subprogram:
3713 return "DW_TAG_subprogram";
3714 case DW_TAG_template_type_param:
3715 return "DW_TAG_template_type_param";
3716 case DW_TAG_template_value_param:
3717 return "DW_TAG_template_value_param";
3718 case DW_TAG_thrown_type:
3719 return "DW_TAG_thrown_type";
3720 case DW_TAG_try_block:
3721 return "DW_TAG_try_block";
3722 case DW_TAG_variant_part:
3723 return "DW_TAG_variant_part";
3724 case DW_TAG_variable:
3725 return "DW_TAG_variable";
3726 case DW_TAG_volatile_type:
3727 return "DW_TAG_volatile_type";
3728 case DW_TAG_MIPS_loop:
3729 return "DW_TAG_MIPS_loop";
3730 case DW_TAG_format_label:
3731 return "DW_TAG_format_label";
3732 case DW_TAG_function_template:
3733 return "DW_TAG_function_template";
3734 case DW_TAG_class_template:
3735 return "DW_TAG_class_template";
3737 return "DW_TAG_<unknown>";
3741 /* Convert a DWARF attribute code into its string name. */
3744 dwarf_attr_name (attr)
3745 register unsigned attr;
3750 return "DW_AT_sibling";
3751 case DW_AT_location:
3752 return "DW_AT_location";
3754 return "DW_AT_name";
3755 case DW_AT_ordering:
3756 return "DW_AT_ordering";
3757 case DW_AT_subscr_data:
3758 return "DW_AT_subscr_data";
3759 case DW_AT_byte_size:
3760 return "DW_AT_byte_size";
3761 case DW_AT_bit_offset:
3762 return "DW_AT_bit_offset";
3763 case DW_AT_bit_size:
3764 return "DW_AT_bit_size";
3765 case DW_AT_element_list:
3766 return "DW_AT_element_list";
3767 case DW_AT_stmt_list:
3768 return "DW_AT_stmt_list";
3770 return "DW_AT_low_pc";
3772 return "DW_AT_high_pc";
3773 case DW_AT_language:
3774 return "DW_AT_language";
3776 return "DW_AT_member";
3778 return "DW_AT_discr";
3779 case DW_AT_discr_value:
3780 return "DW_AT_discr_value";
3781 case DW_AT_visibility:
3782 return "DW_AT_visibility";
3784 return "DW_AT_import";
3785 case DW_AT_string_length:
3786 return "DW_AT_string_length";
3787 case DW_AT_common_reference:
3788 return "DW_AT_common_reference";
3789 case DW_AT_comp_dir:
3790 return "DW_AT_comp_dir";
3791 case DW_AT_const_value:
3792 return "DW_AT_const_value";
3793 case DW_AT_containing_type:
3794 return "DW_AT_containing_type";
3795 case DW_AT_default_value:
3796 return "DW_AT_default_value";
3798 return "DW_AT_inline";
3799 case DW_AT_is_optional:
3800 return "DW_AT_is_optional";
3801 case DW_AT_lower_bound:
3802 return "DW_AT_lower_bound";
3803 case DW_AT_producer:
3804 return "DW_AT_producer";
3805 case DW_AT_prototyped:
3806 return "DW_AT_prototyped";
3807 case DW_AT_return_addr:
3808 return "DW_AT_return_addr";
3809 case DW_AT_start_scope:
3810 return "DW_AT_start_scope";
3811 case DW_AT_stride_size:
3812 return "DW_AT_stride_size";
3813 case DW_AT_upper_bound:
3814 return "DW_AT_upper_bound";
3815 case DW_AT_abstract_origin:
3816 return "DW_AT_abstract_origin";
3817 case DW_AT_accessibility:
3818 return "DW_AT_accessibility";
3819 case DW_AT_address_class:
3820 return "DW_AT_address_class";
3821 case DW_AT_artificial:
3822 return "DW_AT_artificial";
3823 case DW_AT_base_types:
3824 return "DW_AT_base_types";
3825 case DW_AT_calling_convention:
3826 return "DW_AT_calling_convention";
3828 return "DW_AT_count";
3829 case DW_AT_data_member_location:
3830 return "DW_AT_data_member_location";
3831 case DW_AT_decl_column:
3832 return "DW_AT_decl_column";
3833 case DW_AT_decl_file:
3834 return "DW_AT_decl_file";
3835 case DW_AT_decl_line:
3836 return "DW_AT_decl_line";
3837 case DW_AT_declaration:
3838 return "DW_AT_declaration";
3839 case DW_AT_discr_list:
3840 return "DW_AT_discr_list";
3841 case DW_AT_encoding:
3842 return "DW_AT_encoding";
3843 case DW_AT_external:
3844 return "DW_AT_external";
3845 case DW_AT_frame_base:
3846 return "DW_AT_frame_base";
3848 return "DW_AT_friend";
3849 case DW_AT_identifier_case:
3850 return "DW_AT_identifier_case";
3851 case DW_AT_macro_info:
3852 return "DW_AT_macro_info";
3853 case DW_AT_namelist_items:
3854 return "DW_AT_namelist_items";
3855 case DW_AT_priority:
3856 return "DW_AT_priority";
3858 return "DW_AT_segment";
3859 case DW_AT_specification:
3860 return "DW_AT_specification";
3861 case DW_AT_static_link:
3862 return "DW_AT_static_link";
3864 return "DW_AT_type";
3865 case DW_AT_use_location:
3866 return "DW_AT_use_location";
3867 case DW_AT_variable_parameter:
3868 return "DW_AT_variable_parameter";
3869 case DW_AT_virtuality:
3870 return "DW_AT_virtuality";
3871 case DW_AT_vtable_elem_location:
3872 return "DW_AT_vtable_elem_location";
3874 case DW_AT_MIPS_fde:
3875 return "DW_AT_MIPS_fde";
3876 case DW_AT_MIPS_loop_begin:
3877 return "DW_AT_MIPS_loop_begin";
3878 case DW_AT_MIPS_tail_loop_begin:
3879 return "DW_AT_MIPS_tail_loop_begin";
3880 case DW_AT_MIPS_epilog_begin:
3881 return "DW_AT_MIPS_epilog_begin";
3882 case DW_AT_MIPS_loop_unroll_factor:
3883 return "DW_AT_MIPS_loop_unroll_factor";
3884 case DW_AT_MIPS_software_pipeline_depth:
3885 return "DW_AT_MIPS_software_pipeline_depth";
3886 case DW_AT_MIPS_linkage_name:
3887 return "DW_AT_MIPS_linkage_name";
3888 case DW_AT_MIPS_stride:
3889 return "DW_AT_MIPS_stride";
3890 case DW_AT_MIPS_abstract_name:
3891 return "DW_AT_MIPS_abstract_name";
3892 case DW_AT_MIPS_clone_origin:
3893 return "DW_AT_MIPS_clone_origin";
3894 case DW_AT_MIPS_has_inlines:
3895 return "DW_AT_MIPS_has_inlines";
3897 case DW_AT_sf_names:
3898 return "DW_AT_sf_names";
3899 case DW_AT_src_info:
3900 return "DW_AT_src_info";
3901 case DW_AT_mac_info:
3902 return "DW_AT_mac_info";
3903 case DW_AT_src_coords:
3904 return "DW_AT_src_coords";
3905 case DW_AT_body_begin:
3906 return "DW_AT_body_begin";
3907 case DW_AT_body_end:
3908 return "DW_AT_body_end";
3910 return "DW_AT_<unknown>";
3914 /* Convert a DWARF value form code into its string name. */
3917 dwarf_form_name (form)
3918 register unsigned form;
3923 return "DW_FORM_addr";
3924 case DW_FORM_block2:
3925 return "DW_FORM_block2";
3926 case DW_FORM_block4:
3927 return "DW_FORM_block4";
3929 return "DW_FORM_data2";
3931 return "DW_FORM_data4";
3933 return "DW_FORM_data8";
3934 case DW_FORM_string:
3935 return "DW_FORM_string";
3937 return "DW_FORM_block";
3938 case DW_FORM_block1:
3939 return "DW_FORM_block1";
3941 return "DW_FORM_data1";
3943 return "DW_FORM_flag";
3945 return "DW_FORM_sdata";
3947 return "DW_FORM_strp";
3949 return "DW_FORM_udata";
3950 case DW_FORM_ref_addr:
3951 return "DW_FORM_ref_addr";
3953 return "DW_FORM_ref1";
3955 return "DW_FORM_ref2";
3957 return "DW_FORM_ref4";
3959 return "DW_FORM_ref8";
3960 case DW_FORM_ref_udata:
3961 return "DW_FORM_ref_udata";
3962 case DW_FORM_indirect:
3963 return "DW_FORM_indirect";
3965 return "DW_FORM_<unknown>";
3969 /* Convert a DWARF type code into its string name. */
3973 dwarf_type_encoding_name (enc)
3974 register unsigned enc;
3978 case DW_ATE_address:
3979 return "DW_ATE_address";
3980 case DW_ATE_boolean:
3981 return "DW_ATE_boolean";
3982 case DW_ATE_complex_float:
3983 return "DW_ATE_complex_float";
3985 return "DW_ATE_float";
3987 return "DW_ATE_signed";
3988 case DW_ATE_signed_char:
3989 return "DW_ATE_signed_char";
3990 case DW_ATE_unsigned:
3991 return "DW_ATE_unsigned";
3992 case DW_ATE_unsigned_char:
3993 return "DW_ATE_unsigned_char";
3995 return "DW_ATE_<unknown>";
4000 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
4001 instance of an inlined instance of a decl which is local to an inline
4002 function, so we have to trace all of the way back through the origin chain
4003 to find out what sort of node actually served as the original seed for the
4007 decl_ultimate_origin (decl)
4010 /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the
4011 nodes in the function to point to themselves; ignore that if
4012 we're trying to output the abstract instance of this function. */
4013 if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl)
4016 #ifdef ENABLE_CHECKING
4017 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
4018 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
4019 most distant ancestor, this should never happen. */
4023 return DECL_ABSTRACT_ORIGIN (decl);
4026 /* Determine the "ultimate origin" of a block. The block may be an inlined
4027 instance of an inlined instance of a block which is local to an inline
4028 function, so we have to trace all of the way back through the origin chain
4029 to find out what sort of node actually served as the original seed for the
4033 block_ultimate_origin (block)
4034 register tree block;
4036 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
4038 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
4039 nodes in the function to point to themselves; ignore that if
4040 we're trying to output the abstract instance of this function. */
4041 if (BLOCK_ABSTRACT (block) && immediate_origin == block)
4044 if (immediate_origin == NULL_TREE)
4048 register tree ret_val;
4049 register tree lookahead = immediate_origin;
4053 ret_val = lookahead;
4054 lookahead = (TREE_CODE (ret_val) == BLOCK)
4055 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
4058 while (lookahead != NULL && lookahead != ret_val);
4064 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
4065 of a virtual function may refer to a base class, so we check the 'this'
4069 decl_class_context (decl)
4072 tree context = NULL_TREE;
4074 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
4075 context = DECL_CONTEXT (decl);
4077 context = TYPE_MAIN_VARIANT
4078 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
4080 if (context && !TYPE_P (context))
4081 context = NULL_TREE;
4086 /* Add an attribute/value pair to a DIE. We build the lists up in reverse
4087 addition order, and correct that in add_sibling_attributes. */
4090 add_dwarf_attr (die, attr)
4091 register dw_die_ref die;
4092 register dw_attr_ref attr;
4094 if (die != NULL && attr != NULL)
4096 attr->dw_attr_next = die->die_attr;
4097 die->die_attr = attr;
4101 static inline dw_val_class AT_class PARAMS ((dw_attr_ref));
4102 static inline dw_val_class
4106 return a->dw_attr_val.val_class;
4109 /* Add a flag value attribute to a DIE. */
4112 add_AT_flag (die, attr_kind, flag)
4113 register dw_die_ref die;
4114 register enum dwarf_attribute attr_kind;
4115 register unsigned flag;
4117 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4119 attr->dw_attr_next = NULL;
4120 attr->dw_attr = attr_kind;
4121 attr->dw_attr_val.val_class = dw_val_class_flag;
4122 attr->dw_attr_val.v.val_flag = flag;
4123 add_dwarf_attr (die, attr);
4126 static inline unsigned AT_flag PARAMS ((dw_attr_ref));
4127 static inline unsigned
4129 register dw_attr_ref a;
4131 if (a && AT_class (a) == dw_val_class_flag)
4132 return a->dw_attr_val.v.val_flag;
4137 /* Add a signed integer attribute value to a DIE. */
4140 add_AT_int (die, attr_kind, int_val)
4141 register dw_die_ref die;
4142 register enum dwarf_attribute attr_kind;
4143 register long int int_val;
4145 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4147 attr->dw_attr_next = NULL;
4148 attr->dw_attr = attr_kind;
4149 attr->dw_attr_val.val_class = dw_val_class_const;
4150 attr->dw_attr_val.v.val_int = int_val;
4151 add_dwarf_attr (die, attr);
4154 static inline long int AT_int PARAMS ((dw_attr_ref));
4155 static inline long int
4157 register dw_attr_ref a;
4159 if (a && AT_class (a) == dw_val_class_const)
4160 return a->dw_attr_val.v.val_int;
4165 /* Add an unsigned integer attribute value to a DIE. */
4168 add_AT_unsigned (die, attr_kind, unsigned_val)
4169 register dw_die_ref die;
4170 register enum dwarf_attribute attr_kind;
4171 register unsigned long unsigned_val;
4173 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4175 attr->dw_attr_next = NULL;
4176 attr->dw_attr = attr_kind;
4177 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
4178 attr->dw_attr_val.v.val_unsigned = unsigned_val;
4179 add_dwarf_attr (die, attr);
4182 static inline unsigned long AT_unsigned PARAMS ((dw_attr_ref));
4183 static inline unsigned long
4185 register dw_attr_ref a;
4187 if (a && AT_class (a) == dw_val_class_unsigned_const)
4188 return a->dw_attr_val.v.val_unsigned;
4193 /* Add an unsigned double integer attribute value to a DIE. */
4196 add_AT_long_long (die, attr_kind, val_hi, val_low)
4197 register dw_die_ref die;
4198 register enum dwarf_attribute attr_kind;
4199 register unsigned long val_hi;
4200 register unsigned long val_low;
4202 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4204 attr->dw_attr_next = NULL;
4205 attr->dw_attr = attr_kind;
4206 attr->dw_attr_val.val_class = dw_val_class_long_long;
4207 attr->dw_attr_val.v.val_long_long.hi = val_hi;
4208 attr->dw_attr_val.v.val_long_long.low = val_low;
4209 add_dwarf_attr (die, attr);
4212 /* Add a floating point attribute value to a DIE and return it. */
4215 add_AT_float (die, attr_kind, length, array)
4216 register dw_die_ref die;
4217 register enum dwarf_attribute attr_kind;
4218 register unsigned length;
4219 register long *array;
4221 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4223 attr->dw_attr_next = NULL;
4224 attr->dw_attr = attr_kind;
4225 attr->dw_attr_val.val_class = dw_val_class_float;
4226 attr->dw_attr_val.v.val_float.length = length;
4227 attr->dw_attr_val.v.val_float.array = array;
4228 add_dwarf_attr (die, attr);
4231 /* Add a string attribute value to a DIE. */
4234 add_AT_string (die, attr_kind, str)
4235 register dw_die_ref die;
4236 register enum dwarf_attribute attr_kind;
4237 register const char *str;
4239 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4241 attr->dw_attr_next = NULL;
4242 attr->dw_attr = attr_kind;
4243 attr->dw_attr_val.val_class = dw_val_class_str;
4244 attr->dw_attr_val.v.val_str = xstrdup (str);
4245 add_dwarf_attr (die, attr);
4248 static inline const char *AT_string PARAMS ((dw_attr_ref));
4249 static inline const char *
4251 register dw_attr_ref a;
4253 if (a && AT_class (a) == dw_val_class_str)
4254 return a->dw_attr_val.v.val_str;
4259 /* Add a DIE reference attribute value to a DIE. */
4262 add_AT_die_ref (die, attr_kind, targ_die)
4263 register dw_die_ref die;
4264 register enum dwarf_attribute attr_kind;
4265 register dw_die_ref targ_die;
4267 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4269 attr->dw_attr_next = NULL;
4270 attr->dw_attr = attr_kind;
4271 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4272 attr->dw_attr_val.v.val_die_ref = targ_die;
4273 add_dwarf_attr (die, attr);
4276 static inline dw_die_ref AT_ref PARAMS ((dw_attr_ref));
4277 static inline dw_die_ref
4279 register dw_attr_ref a;
4281 if (a && AT_class (a) == dw_val_class_die_ref)
4282 return a->dw_attr_val.v.val_die_ref;
4287 /* Add an FDE reference attribute value to a DIE. */
4290 add_AT_fde_ref (die, attr_kind, targ_fde)
4291 register dw_die_ref die;
4292 register enum dwarf_attribute attr_kind;
4293 register unsigned targ_fde;
4295 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4297 attr->dw_attr_next = NULL;
4298 attr->dw_attr = attr_kind;
4299 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
4300 attr->dw_attr_val.v.val_fde_index = targ_fde;
4301 add_dwarf_attr (die, attr);
4304 /* Add a location description attribute value to a DIE. */
4307 add_AT_loc (die, attr_kind, loc)
4308 register dw_die_ref die;
4309 register enum dwarf_attribute attr_kind;
4310 register dw_loc_descr_ref loc;
4312 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4314 attr->dw_attr_next = NULL;
4315 attr->dw_attr = attr_kind;
4316 attr->dw_attr_val.val_class = dw_val_class_loc;
4317 attr->dw_attr_val.v.val_loc = loc;
4318 add_dwarf_attr (die, attr);
4321 static inline dw_loc_descr_ref AT_loc PARAMS ((dw_attr_ref));
4322 static inline dw_loc_descr_ref
4324 register dw_attr_ref a;
4326 if (a && AT_class (a) == dw_val_class_loc)
4327 return a->dw_attr_val.v.val_loc;
4332 /* Add an address constant attribute value to a DIE. */
4335 add_AT_addr (die, attr_kind, addr)
4336 register dw_die_ref die;
4337 register enum dwarf_attribute attr_kind;
4340 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4342 attr->dw_attr_next = NULL;
4343 attr->dw_attr = attr_kind;
4344 attr->dw_attr_val.val_class = dw_val_class_addr;
4345 attr->dw_attr_val.v.val_addr = addr;
4346 add_dwarf_attr (die, attr);
4349 static inline rtx AT_addr PARAMS ((dw_attr_ref));
4352 register dw_attr_ref a;
4354 if (a && AT_class (a) == dw_val_class_addr)
4355 return a->dw_attr_val.v.val_addr;
4360 /* Add a label identifier attribute value to a DIE. */
4363 add_AT_lbl_id (die, attr_kind, lbl_id)
4364 register dw_die_ref die;
4365 register enum dwarf_attribute attr_kind;
4366 register const char *lbl_id;
4368 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4370 attr->dw_attr_next = NULL;
4371 attr->dw_attr = attr_kind;
4372 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
4373 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
4374 add_dwarf_attr (die, attr);
4377 /* Add a section offset attribute value to a DIE. */
4380 add_AT_lbl_offset (die, attr_kind, label)
4381 register dw_die_ref die;
4382 register enum dwarf_attribute attr_kind;
4383 register const char *label;
4385 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4387 attr->dw_attr_next = NULL;
4388 attr->dw_attr = attr_kind;
4389 attr->dw_attr_val.val_class = dw_val_class_lbl_offset;
4390 attr->dw_attr_val.v.val_lbl_id = xstrdup (label);
4391 add_dwarf_attr (die, attr);
4395 static inline const char *AT_lbl PARAMS ((dw_attr_ref));
4396 static inline const char *
4398 register dw_attr_ref a;
4400 if (a && (AT_class (a) == dw_val_class_lbl_id
4401 || AT_class (a) == dw_val_class_lbl_offset))
4402 return a->dw_attr_val.v.val_lbl_id;
4407 /* Get the attribute of type attr_kind. */
4409 static inline dw_attr_ref
4410 get_AT (die, attr_kind)
4411 register dw_die_ref die;
4412 register enum dwarf_attribute attr_kind;
4414 register dw_attr_ref a;
4415 register dw_die_ref spec = NULL;
4419 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4421 if (a->dw_attr == attr_kind)
4424 if (a->dw_attr == DW_AT_specification
4425 || a->dw_attr == DW_AT_abstract_origin)
4430 return get_AT (spec, attr_kind);
4436 /* Return the "low pc" attribute value, typically associated with
4437 a subprogram DIE. Return null if the "low pc" attribute is
4438 either not prsent, or if it cannot be represented as an
4439 assembler label identifier. */
4441 static inline const char *
4443 register dw_die_ref die;
4445 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
4449 /* Return the "high pc" attribute value, typically associated with
4450 a subprogram DIE. Return null if the "high pc" attribute is
4451 either not prsent, or if it cannot be represented as an
4452 assembler label identifier. */
4454 static inline const char *
4456 register dw_die_ref die;
4458 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
4462 /* Return the value of the string attribute designated by ATTR_KIND, or
4463 NULL if it is not present. */
4465 static inline const char *
4466 get_AT_string (die, attr_kind)
4467 register dw_die_ref die;
4468 register enum dwarf_attribute attr_kind;
4470 register dw_attr_ref a = get_AT (die, attr_kind);
4471 return AT_string (a);
4474 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
4475 if it is not present. */
4478 get_AT_flag (die, attr_kind)
4479 register dw_die_ref die;
4480 register enum dwarf_attribute attr_kind;
4482 register dw_attr_ref a = get_AT (die, attr_kind);
4486 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
4487 if it is not present. */
4489 static inline unsigned
4490 get_AT_unsigned (die, attr_kind)
4491 register dw_die_ref die;
4492 register enum dwarf_attribute attr_kind;
4494 register dw_attr_ref a = get_AT (die, attr_kind);
4495 return AT_unsigned (a);
4498 static inline dw_die_ref
4499 get_AT_ref (die, attr_kind)
4501 register enum dwarf_attribute attr_kind;
4503 register dw_attr_ref a = get_AT (die, attr_kind);
4510 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4512 return (lang == DW_LANG_C || lang == DW_LANG_C89
4513 || lang == DW_LANG_C_plus_plus);
4519 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4521 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
4524 /* Free up the memory used by A. */
4526 static inline void free_AT PARAMS ((dw_attr_ref));
4531 switch (AT_class (a))
4533 case dw_val_class_str:
4534 case dw_val_class_lbl_id:
4535 case dw_val_class_lbl_offset:
4536 free (a->dw_attr_val.v.val_str);
4546 /* Remove the specified attribute if present. */
4549 remove_AT (die, attr_kind)
4550 register dw_die_ref die;
4551 register enum dwarf_attribute attr_kind;
4553 register dw_attr_ref *p;
4554 register dw_attr_ref removed = NULL;
4558 for (p = &(die->die_attr); *p; p = &((*p)->dw_attr_next))
4559 if ((*p)->dw_attr == attr_kind)
4562 *p = (*p)->dw_attr_next;
4571 /* Free up the memory used by DIE. */
4573 static inline void free_die PARAMS ((dw_die_ref));
4578 remove_children (die);
4582 /* Discard the children of this DIE. */
4585 remove_children (die)
4586 register dw_die_ref die;
4588 register dw_die_ref child_die = die->die_child;
4590 die->die_child = NULL;
4592 while (child_die != NULL)
4594 register dw_die_ref tmp_die = child_die;
4595 register dw_attr_ref a;
4597 child_die = child_die->die_sib;
4599 for (a = tmp_die->die_attr; a != NULL; )
4601 register dw_attr_ref tmp_a = a;
4603 a = a->dw_attr_next;
4611 /* Add a child DIE below its parent. We build the lists up in reverse
4612 addition order, and correct that in add_sibling_attributes. */
4615 add_child_die (die, child_die)
4616 register dw_die_ref die;
4617 register dw_die_ref child_die;
4619 if (die != NULL && child_die != NULL)
4621 if (die == child_die)
4623 child_die->die_parent = die;
4624 child_die->die_sib = die->die_child;
4625 die->die_child = child_die;
4629 /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT
4630 is the specification, to the front of PARENT's list of children. */
4633 splice_child_die (parent, child)
4634 dw_die_ref parent, child;
4638 /* We want the declaration DIE from inside the class, not the
4639 specification DIE at toplevel. */
4640 if (child->die_parent != parent)
4642 dw_die_ref tmp = get_AT_ref (child, DW_AT_specification);
4647 if (child->die_parent != parent
4648 && child->die_parent != get_AT_ref (parent, DW_AT_specification))
4651 for (p = &(parent->die_child); *p; p = &((*p)->die_sib))
4654 *p = child->die_sib;
4658 child->die_sib = parent->die_child;
4659 parent->die_child = child;
4662 /* Return a pointer to a newly created DIE node. */
4664 static inline dw_die_ref
4665 new_die (tag_value, parent_die)
4666 register enum dwarf_tag tag_value;
4667 register dw_die_ref parent_die;
4669 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4671 die->die_tag = tag_value;
4672 die->die_abbrev = 0;
4673 die->die_offset = 0;
4674 die->die_child = NULL;
4675 die->die_parent = NULL;
4676 die->die_sib = NULL;
4677 die->die_attr = NULL;
4679 if (parent_die != NULL)
4680 add_child_die (parent_die, die);
4683 limbo_die_node *limbo_node;
4685 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4686 limbo_node->die = die;
4687 limbo_node->next = limbo_die_list;
4688 limbo_die_list = limbo_node;
4694 /* Return the DIE associated with the given type specifier. */
4696 static inline dw_die_ref
4697 lookup_type_die (type)
4700 if (TREE_CODE (type) == VECTOR_TYPE)
4701 type = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4702 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4705 /* Equate a DIE to a given type specifier. */
4708 equate_type_number_to_die (type, type_die)
4710 register dw_die_ref type_die;
4712 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4715 /* Return the DIE associated with a given declaration. */
4717 static inline dw_die_ref
4718 lookup_decl_die (decl)
4721 register unsigned decl_id = DECL_UID (decl);
4723 return (decl_id < decl_die_table_in_use
4724 ? decl_die_table[decl_id] : NULL);
4727 /* Equate a DIE to a particular declaration. */
4730 equate_decl_number_to_die (decl, decl_die)
4732 register dw_die_ref decl_die;
4734 register unsigned decl_id = DECL_UID (decl);
4735 register unsigned num_allocated;
4737 if (decl_id >= decl_die_table_allocated)
4740 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4741 / DECL_DIE_TABLE_INCREMENT)
4742 * DECL_DIE_TABLE_INCREMENT;
4745 = (dw_die_ref *) xrealloc (decl_die_table,
4746 sizeof (dw_die_ref) * num_allocated);
4748 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4749 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4750 decl_die_table_allocated = num_allocated;
4753 if (decl_id >= decl_die_table_in_use)
4754 decl_die_table_in_use = (decl_id + 1);
4756 decl_die_table[decl_id] = decl_die;
4759 /* Keep track of the number of spaces used to indent the
4760 output of the debugging routines that print the structure of
4761 the DIE internal representation. */
4762 static int print_indent;
4764 /* Indent the line the number of spaces given by print_indent. */
4767 print_spaces (outfile)
4770 fprintf (outfile, "%*s", print_indent, "");
4773 /* Print the information associated with a given DIE, and its children.
4774 This routine is a debugging aid only. */
4777 print_die (die, outfile)
4781 register dw_attr_ref a;
4782 register dw_die_ref c;
4784 print_spaces (outfile);
4785 fprintf (outfile, "DIE %4lu: %s\n",
4786 die->die_offset, dwarf_tag_name (die->die_tag));
4787 print_spaces (outfile);
4788 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4789 fprintf (outfile, " offset: %lu\n", die->die_offset);
4791 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4793 print_spaces (outfile);
4794 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4796 switch (AT_class (a))
4798 case dw_val_class_addr:
4799 fprintf (outfile, "address");
4801 case dw_val_class_loc:
4802 fprintf (outfile, "location descriptor");
4804 case dw_val_class_const:
4805 fprintf (outfile, "%ld", AT_int (a));
4807 case dw_val_class_unsigned_const:
4808 fprintf (outfile, "%lu", AT_unsigned (a));
4810 case dw_val_class_long_long:
4811 fprintf (outfile, "constant (%lu,%lu)",
4812 a->dw_attr_val.v.val_long_long.hi,
4813 a->dw_attr_val.v.val_long_long.low);
4815 case dw_val_class_float:
4816 fprintf (outfile, "floating-point constant");
4818 case dw_val_class_flag:
4819 fprintf (outfile, "%u", AT_flag (a));
4821 case dw_val_class_die_ref:
4822 if (AT_ref (a) != NULL)
4823 fprintf (outfile, "die -> %lu", AT_ref (a)->die_offset);
4825 fprintf (outfile, "die -> <null>");
4827 case dw_val_class_lbl_id:
4828 case dw_val_class_lbl_offset:
4829 fprintf (outfile, "label: %s", AT_lbl (a));
4831 case dw_val_class_str:
4832 if (AT_string (a) != NULL)
4833 fprintf (outfile, "\"%s\"", AT_string (a));
4835 fprintf (outfile, "<null>");
4841 fprintf (outfile, "\n");
4844 if (die->die_child != NULL)
4847 for (c = die->die_child; c != NULL; c = c->die_sib)
4848 print_die (c, outfile);
4854 /* Print the contents of the source code line number correspondence table.
4855 This routine is a debugging aid only. */
4858 print_dwarf_line_table (outfile)
4861 register unsigned i;
4862 register dw_line_info_ref line_info;
4864 fprintf (outfile, "\n\nDWARF source line information\n");
4865 for (i = 1; i < line_info_table_in_use; ++i)
4867 line_info = &line_info_table[i];
4868 fprintf (outfile, "%5d: ", i);
4869 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4870 fprintf (outfile, "%6ld", line_info->dw_line_num);
4871 fprintf (outfile, "\n");
4874 fprintf (outfile, "\n\n");
4877 /* Print the information collected for a given DIE. */
4880 debug_dwarf_die (die)
4883 print_die (die, stderr);
4886 /* Print all DWARF information collected for the compilation unit.
4887 This routine is a debugging aid only. */
4893 print_die (comp_unit_die, stderr);
4894 if (! DWARF2_ASM_LINE_DEBUG_INFO)
4895 print_dwarf_line_table (stderr);
4898 /* We build up the lists of children and attributes by pushing new ones
4899 onto the beginning of the list. Reverse the lists for DIE so that
4900 they are in order of addition. */
4903 reverse_die_lists (die)
4904 register dw_die_ref die;
4906 register dw_die_ref c, cp, cn;
4907 register dw_attr_ref a, ap, an;
4909 for (a = die->die_attr, ap = 0; a; a = an)
4911 an = a->dw_attr_next;
4912 a->dw_attr_next = ap;
4917 for (c = die->die_child, cp = 0; c; c = cn)
4923 die->die_child = cp;
4926 /* Traverse the DIE, reverse its lists of attributes and children, and
4927 add a sibling attribute if it may have the effect of speeding up
4928 access to siblings. To save some space, avoid generating sibling
4929 attributes for DIE's without children. */
4932 add_sibling_attributes (die)
4933 register dw_die_ref die;
4935 register dw_die_ref c;
4937 reverse_die_lists (die);
4939 if (die != comp_unit_die && die->die_sib && die->die_child != NULL)
4940 /* Add the sibling link to the front of the attribute list. */
4941 add_AT_die_ref (die, DW_AT_sibling, die->die_sib);
4943 for (c = die->die_child; c != NULL; c = c->die_sib)
4944 add_sibling_attributes (c);
4947 /* The format of each DIE (and its attribute value pairs)
4948 is encoded in an abbreviation table. This routine builds the
4949 abbreviation table and assigns a unique abbreviation id for
4950 each abbreviation entry. The children of each die are visited
4954 build_abbrev_table (die)
4955 register dw_die_ref die;
4957 register unsigned long abbrev_id;
4958 register unsigned long n_alloc;
4959 register dw_die_ref c;
4960 register dw_attr_ref d_attr, a_attr;
4961 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4963 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4965 if (abbrev->die_tag == die->die_tag)
4967 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4969 a_attr = abbrev->die_attr;
4970 d_attr = die->die_attr;
4972 while (a_attr != NULL && d_attr != NULL)
4974 if ((a_attr->dw_attr != d_attr->dw_attr)
4975 || (value_format (a_attr) != value_format (d_attr)))
4978 a_attr = a_attr->dw_attr_next;
4979 d_attr = d_attr->dw_attr_next;
4982 if (a_attr == NULL && d_attr == NULL)
4988 if (abbrev_id >= abbrev_die_table_in_use)
4990 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4992 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4994 = (dw_die_ref *) xrealloc (abbrev_die_table,
4995 sizeof (dw_die_ref) * n_alloc);
4997 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4998 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4999 abbrev_die_table_allocated = n_alloc;
5002 ++abbrev_die_table_in_use;
5003 abbrev_die_table[abbrev_id] = die;
5006 die->die_abbrev = abbrev_id;
5007 for (c = die->die_child; c != NULL; c = c->die_sib)
5008 build_abbrev_table (c);
5011 /* Return the size of a string, including the null byte.
5013 This used to treat backslashes as escapes, and hence they were not included
5014 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
5015 which treats a backslash as a backslash, escaping it if necessary, and hence
5016 we must include them in the count. */
5018 static unsigned long
5019 size_of_string (str)
5020 register const char *str;
5022 return strlen (str) + 1;
5025 /* Return the power-of-two number of bytes necessary to represent VALUE. */
5028 constant_size (value)
5029 long unsigned value;
5036 log = floor_log2 (value);
5039 log = 1 << (floor_log2 (log) + 1);
5044 /* Return the size of a DIE, as it is represented in the
5045 .debug_info section. */
5047 static unsigned long
5049 register dw_die_ref die;
5051 register unsigned long size = 0;
5052 register dw_attr_ref a;
5054 size += size_of_uleb128 (die->die_abbrev);
5055 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5057 switch (AT_class (a))
5059 case dw_val_class_addr:
5060 size += DWARF2_ADDR_SIZE;
5062 case dw_val_class_loc:
5064 register unsigned long lsize = size_of_locs (AT_loc (a));
5067 size += constant_size (lsize);
5071 case dw_val_class_const:
5072 size += size_of_sleb128 (AT_int (a));
5074 case dw_val_class_unsigned_const:
5075 size += constant_size (AT_unsigned (a));
5077 case dw_val_class_long_long:
5078 size += 1 + 8; /* block */
5080 case dw_val_class_float:
5081 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
5083 case dw_val_class_flag:
5086 case dw_val_class_die_ref:
5087 size += DWARF_OFFSET_SIZE;
5089 case dw_val_class_fde_ref:
5090 size += DWARF_OFFSET_SIZE;
5092 case dw_val_class_lbl_id:
5093 size += DWARF2_ADDR_SIZE;
5095 case dw_val_class_lbl_offset:
5096 size += DWARF_OFFSET_SIZE;
5098 case dw_val_class_str:
5099 size += size_of_string (AT_string (a));
5109 /* Size the debugging information associated with a given DIE.
5110 Visits the DIE's children recursively. Updates the global
5111 variable next_die_offset, on each time through. Uses the
5112 current value of next_die_offset to update the die_offset
5113 field in each DIE. */
5116 calc_die_sizes (die)
5119 register dw_die_ref c;
5120 die->die_offset = next_die_offset;
5121 next_die_offset += size_of_die (die);
5123 for (c = die->die_child; c != NULL; c = c->die_sib)
5126 if (die->die_child != NULL)
5127 /* Count the null byte used to terminate sibling lists. */
5128 next_die_offset += 1;
5131 /* Return the size of the line information prolog generated for the
5132 compilation unit. */
5134 static unsigned long
5135 size_of_line_prolog ()
5137 register unsigned long size;
5138 register unsigned long ft_index;
5140 size = DWARF_LINE_PROLOG_HEADER_SIZE;
5142 /* Count the size of the table giving number of args for each
5144 size += DWARF_LINE_OPCODE_BASE - 1;
5146 /* Include directory table is empty (at present). Count only the
5147 null byte used to terminate the table. */
5150 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5152 /* File name entry. */
5153 size += size_of_string (file_table[ft_index]);
5155 /* Include directory index. */
5156 size += size_of_uleb128 (0);
5158 /* Modification time. */
5159 size += size_of_uleb128 (0);
5161 /* File length in bytes. */
5162 size += size_of_uleb128 (0);
5165 /* Count the file table terminator. */
5170 /* Return the size of the .debug_pubnames table generated for the
5171 compilation unit. */
5173 static unsigned long
5176 register unsigned long size;
5177 register unsigned i;
5179 size = DWARF_PUBNAMES_HEADER_SIZE;
5180 for (i = 0; i < pubname_table_in_use; ++i)
5182 register pubname_ref p = &pubname_table[i];
5183 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
5186 size += DWARF_OFFSET_SIZE;
5190 /* Return the size of the information in the .debug_aranges section. */
5192 static unsigned long
5195 register unsigned long size;
5197 size = DWARF_ARANGES_HEADER_SIZE;
5199 /* Count the address/length pair for this compilation unit. */
5200 size += 2 * DWARF2_ADDR_SIZE;
5201 size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use;
5203 /* Count the two zero words used to terminated the address range table. */
5204 size += 2 * DWARF2_ADDR_SIZE;
5208 /* Select the encoding of an attribute value. */
5210 static enum dwarf_form
5214 switch (a->dw_attr_val.val_class)
5216 case dw_val_class_addr:
5217 return DW_FORM_addr;
5218 case dw_val_class_loc:
5219 switch (constant_size (size_of_locs (AT_loc (a))))
5222 return DW_FORM_block1;
5224 return DW_FORM_block2;
5228 case dw_val_class_const:
5229 return DW_FORM_sdata;
5230 case dw_val_class_unsigned_const:
5231 switch (constant_size (AT_unsigned (a)))
5234 return DW_FORM_data1;
5236 return DW_FORM_data2;
5238 return DW_FORM_data4;
5240 return DW_FORM_data8;
5244 case dw_val_class_long_long:
5245 return DW_FORM_block1;
5246 case dw_val_class_float:
5247 return DW_FORM_block1;
5248 case dw_val_class_flag:
5249 return DW_FORM_flag;
5250 case dw_val_class_die_ref:
5252 case dw_val_class_fde_ref:
5253 return DW_FORM_data;
5254 case dw_val_class_lbl_id:
5255 return DW_FORM_addr;
5256 case dw_val_class_lbl_offset:
5257 return DW_FORM_data;
5258 case dw_val_class_str:
5259 return DW_FORM_string;
5265 /* Output the encoding of an attribute value. */
5268 output_value_format (a)
5271 enum dwarf_form form = value_format (a);
5273 output_uleb128 (form);
5275 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
5277 fputc ('\n', asm_out_file);
5280 /* Output the .debug_abbrev section which defines the DIE abbreviation
5284 output_abbrev_section ()
5286 unsigned long abbrev_id;
5289 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5291 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5293 output_uleb128 (abbrev_id);
5295 fprintf (asm_out_file, " (abbrev code)");
5297 fputc ('\n', asm_out_file);
5298 output_uleb128 (abbrev->die_tag);
5300 fprintf (asm_out_file, " (TAG: %s)",
5301 dwarf_tag_name (abbrev->die_tag));
5303 fputc ('\n', asm_out_file);
5304 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5305 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5308 fprintf (asm_out_file, "\t%s %s",
5310 (abbrev->die_child != NULL
5311 ? "DW_children_yes" : "DW_children_no"));
5313 fputc ('\n', asm_out_file);
5315 for (a_attr = abbrev->die_attr; a_attr != NULL;
5316 a_attr = a_attr->dw_attr_next)
5318 output_uleb128 (a_attr->dw_attr);
5320 fprintf (asm_out_file, " (%s)",
5321 dwarf_attr_name (a_attr->dw_attr));
5323 fputc ('\n', asm_out_file);
5324 output_value_format (a_attr);
5327 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5330 /* Terminate the table. */
5331 fprintf (asm_out_file, "\t%s\t0\n", ASM_BYTE_OP);
5334 /* Output the DIE and its attributes. Called recursively to generate
5335 the definitions of each child DIE. */
5339 register dw_die_ref die;
5341 register dw_attr_ref a;
5342 register dw_die_ref c;
5343 register unsigned long size;
5345 output_uleb128 (die->die_abbrev);
5347 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5348 die->die_offset, dwarf_tag_name (die->die_tag));
5350 fputc ('\n', asm_out_file);
5352 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5354 switch (AT_class (a))
5356 case dw_val_class_addr:
5357 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, AT_addr (a));
5360 case dw_val_class_loc:
5361 size = size_of_locs (AT_loc (a));
5363 /* Output the block length for this list of location operations. */
5364 switch (constant_size (size))
5367 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5370 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5377 fprintf (asm_out_file, "\t%s %s",
5378 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5380 fputc ('\n', asm_out_file);
5382 output_loc_sequence (AT_loc (a));
5385 case dw_val_class_const:
5386 /* ??? It would be slightly more efficient to use a scheme like is
5387 used for unsigned constants below, but gdb 4.x does not sign
5388 extend. Gdb 5.x does sign extend. */
5389 output_sleb128 (AT_int (a));
5392 case dw_val_class_unsigned_const:
5393 switch (constant_size (AT_unsigned (a)))
5396 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, AT_unsigned (a));
5399 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, AT_unsigned (a));
5402 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, AT_unsigned (a));
5405 ASM_OUTPUT_DWARF_DATA8 (asm_out_file, AT_unsigned (a));
5412 case dw_val_class_long_long:
5413 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5415 fprintf (asm_out_file, "\t%s %s",
5416 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5418 fputc ('\n', asm_out_file);
5419 ASM_OUTPUT_DWARF_CONST_DOUBLE (asm_out_file,
5420 a->dw_attr_val.v.val_long_long.hi,
5421 a->dw_attr_val.v.val_long_long.low);
5424 fprintf (asm_out_file,
5425 "\t%s long long constant", ASM_COMMENT_START);
5427 fputc ('\n', asm_out_file);
5430 case dw_val_class_float:
5432 register unsigned int i;
5433 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5434 a->dw_attr_val.v.val_float.length * 4);
5436 fprintf (asm_out_file, "\t%s %s",
5437 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5439 fputc ('\n', asm_out_file);
5440 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5442 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5443 a->dw_attr_val.v.val_float.array[i]);
5445 fprintf (asm_out_file, "\t%s fp constant word %u",
5446 ASM_COMMENT_START, i);
5448 fputc ('\n', asm_out_file);
5453 case dw_val_class_flag:
5454 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, AT_flag (a));
5457 case dw_val_class_die_ref:
5458 ASM_OUTPUT_DWARF_DATA (asm_out_file, AT_ref (a)->die_offset);
5461 case dw_val_class_fde_ref:
5464 ASM_GENERATE_INTERNAL_LABEL
5465 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5466 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5467 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5471 case dw_val_class_lbl_id:
5472 ASM_OUTPUT_DWARF_ADDR (asm_out_file, AT_lbl (a));
5475 case dw_val_class_lbl_offset:
5476 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, AT_lbl (a));
5479 case dw_val_class_str:
5481 ASM_OUTPUT_DWARF_STRING (asm_out_file, AT_string (a));
5483 ASM_OUTPUT_ASCII (asm_out_file, AT_string (a),
5484 (int) strlen (AT_string (a)) + 1);
5491 if (AT_class (a) != dw_val_class_loc
5492 && AT_class (a) != dw_val_class_long_long
5493 && AT_class (a) != dw_val_class_float)
5496 fprintf (asm_out_file, "\t%s %s",
5497 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5499 fputc ('\n', asm_out_file);
5503 for (c = die->die_child; c != NULL; c = c->die_sib)
5506 if (die->die_child != NULL)
5508 /* Add null byte to terminate sibling list. */
5509 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5511 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5512 ASM_COMMENT_START, die->die_offset);
5514 fputc ('\n', asm_out_file);
5518 /* Output the compilation unit that appears at the beginning of the
5519 .debug_info section, and precedes the DIE descriptions. */
5522 output_compilation_unit_header ()
5524 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5526 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5529 fputc ('\n', asm_out_file);
5530 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5532 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5534 fputc ('\n', asm_out_file);
5535 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, abbrev_section_label);
5537 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5540 fputc ('\n', asm_out_file);
5541 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF2_ADDR_SIZE);
5543 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5545 fputc ('\n', asm_out_file);
5548 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5549 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5550 argument list, and maybe the scope. */
5553 dwarf2_name (decl, scope)
5557 return (*decl_printable_name) (decl, scope ? 1 : 0);
5560 /* Add a new entry to .debug_pubnames if appropriate. */
5563 add_pubname (decl, die)
5569 if (! TREE_PUBLIC (decl))
5572 if (pubname_table_in_use == pubname_table_allocated)
5574 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5575 pubname_table = (pubname_ref) xrealloc
5576 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5579 p = &pubname_table[pubname_table_in_use++];
5582 p->name = xstrdup (dwarf2_name (decl, 1));
5585 /* Output the public names table used to speed up access to externally
5586 visible names. For now, only generate entries for externally
5587 visible procedures. */
5592 register unsigned i;
5593 register unsigned long pubnames_length = size_of_pubnames ();
5595 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5598 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5601 fputc ('\n', asm_out_file);
5602 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5605 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5607 fputc ('\n', asm_out_file);
5608 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5610 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5613 fputc ('\n', asm_out_file);
5614 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5616 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5618 fputc ('\n', asm_out_file);
5619 for (i = 0; i < pubname_table_in_use; ++i)
5621 register pubname_ref pub = &pubname_table[i];
5623 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5625 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5627 fputc ('\n', asm_out_file);
5631 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5632 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5636 ASM_OUTPUT_ASCII (asm_out_file, pub->name,
5637 (int) strlen (pub->name) + 1);
5640 fputc ('\n', asm_out_file);
5643 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5644 fputc ('\n', asm_out_file);
5647 /* Add a new entry to .debug_aranges if appropriate. */
5650 add_arange (decl, die)
5654 if (! DECL_SECTION_NAME (decl))
5657 if (arange_table_in_use == arange_table_allocated)
5659 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5661 = (arange_ref) xrealloc (arange_table,
5662 arange_table_allocated * sizeof (dw_die_ref));
5665 arange_table[arange_table_in_use++] = die;
5668 /* Output the information that goes into the .debug_aranges table.
5669 Namely, define the beginning and ending address range of the
5670 text section generated for this compilation unit. */
5675 register unsigned i;
5676 register unsigned long aranges_length = size_of_aranges ();
5678 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5680 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5683 fputc ('\n', asm_out_file);
5684 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5686 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5688 fputc ('\n', asm_out_file);
5689 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5691 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5694 fputc ('\n', asm_out_file);
5695 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF2_ADDR_SIZE);
5697 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5699 fputc ('\n', asm_out_file);
5700 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5702 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5705 fputc ('\n', asm_out_file);
5707 /* We need to align to twice the pointer size here. */
5708 if (DWARF_ARANGES_PAD_SIZE)
5710 /* Pad using a 2 bytes word so that padding is correct
5711 for any pointer size. */
5712 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, 0);
5713 for (i = 2; i < DWARF_ARANGES_PAD_SIZE; i += 2)
5714 fprintf (asm_out_file, ",0");
5716 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5717 ASM_COMMENT_START, 2 * DWARF2_ADDR_SIZE);
5720 fputc ('\n', asm_out_file);
5721 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_section_label);
5723 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5725 fputc ('\n', asm_out_file);
5726 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5727 text_section_label);
5729 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5731 fputc ('\n', asm_out_file);
5732 for (i = 0; i < arange_table_in_use; ++i)
5734 dw_die_ref die = arange_table[i];
5736 if (die->die_tag == DW_TAG_subprogram)
5737 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (die));
5740 /* A static variable; extract the symbol from DW_AT_location.
5741 Note that this code isn't currently hit, as we only emit
5742 aranges for functions (jason 9/23/99). */
5744 dw_attr_ref a = get_AT (die, DW_AT_location);
5745 dw_loc_descr_ref loc;
5746 if (! a || AT_class (a) != dw_val_class_loc)
5750 if (loc->dw_loc_opc != DW_OP_addr)
5753 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5754 loc->dw_loc_oprnd1.v.val_addr);
5758 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5760 fputc ('\n', asm_out_file);
5761 if (die->die_tag == DW_TAG_subprogram)
5762 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (die),
5763 get_AT_low_pc (die));
5765 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5766 get_AT_unsigned (die, DW_AT_byte_size));
5769 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5771 fputc ('\n', asm_out_file);
5774 /* Output the terminator words. */
5775 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5776 fputc ('\n', asm_out_file);
5777 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5778 fputc ('\n', asm_out_file);
5781 /* Output the source line number correspondence information. This
5782 information goes into the .debug_line section. */
5787 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5788 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5789 register unsigned opc;
5790 register unsigned n_op_args;
5791 register unsigned long ft_index;
5792 register unsigned long lt_index;
5793 register unsigned long current_line;
5794 register long line_offset;
5795 register long line_delta;
5796 register unsigned long current_file;
5797 register unsigned long function;
5799 ASM_OUTPUT_DWARF_DELTA (asm_out_file, ".LTEND", ".LTSTART");
5801 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5804 fputc ('\n', asm_out_file);
5805 ASM_OUTPUT_LABEL (asm_out_file, ".LTSTART");
5806 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5808 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5810 fputc ('\n', asm_out_file);
5811 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5813 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5815 fputc ('\n', asm_out_file);
5816 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5818 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5821 fputc ('\n', asm_out_file);
5822 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5824 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5827 fputc ('\n', asm_out_file);
5828 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5830 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5833 fputc ('\n', asm_out_file);
5834 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5836 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5839 fputc ('\n', asm_out_file);
5840 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5842 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5844 fputc ('\n', asm_out_file);
5845 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5849 case DW_LNS_advance_pc:
5850 case DW_LNS_advance_line:
5851 case DW_LNS_set_file:
5852 case DW_LNS_set_column:
5853 case DW_LNS_fixed_advance_pc:
5860 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5862 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5863 ASM_COMMENT_START, opc, n_op_args);
5864 fputc ('\n', asm_out_file);
5868 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5870 /* Include directory table is empty, at present */
5871 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5872 fputc ('\n', asm_out_file);
5874 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5876 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5880 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5881 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5882 ASM_COMMENT_START, ft_index);
5886 ASM_OUTPUT_ASCII (asm_out_file,
5887 file_table[ft_index],
5888 (int) strlen (file_table[ft_index]) + 1);
5891 fputc ('\n', asm_out_file);
5893 /* Include directory index */
5895 fputc ('\n', asm_out_file);
5897 /* Modification time */
5899 fputc ('\n', asm_out_file);
5901 /* File length in bytes */
5903 fputc ('\n', asm_out_file);
5906 /* Terminate the file name table */
5907 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5908 fputc ('\n', asm_out_file);
5910 /* We used to set the address register to the first location in the text
5911 section here, but that didn't accomplish anything since we already
5912 have a line note for the opening brace of the first function. */
5914 /* Generate the line number to PC correspondence table, encoded as
5915 a series of state machine operations. */
5918 strcpy (prev_line_label, text_section_label);
5919 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5921 register dw_line_info_ref line_info = &line_info_table[lt_index];
5924 /* Disable this optimization for now; GDB wants to see two line notes
5925 at the beginning of a function so it can find the end of the
5928 /* Don't emit anything for redundant notes. Just updating the
5929 address doesn't accomplish anything, because we already assume
5930 that anything after the last address is this line. */
5931 if (line_info->dw_line_num == current_line
5932 && line_info->dw_file_num == current_file)
5936 /* Emit debug info for the address of the current line, choosing
5937 the encoding that uses the least amount of space. */
5938 /* ??? Unfortunately, we have little choice here currently, and must
5939 always use the most general form. Gcc does not know the address
5940 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5941 dwarf2 aware assemblers at this time, so we can't use any special
5942 pseudo ops that would allow the assembler to optimally encode this for
5943 us. Many ports do have length attributes which will give an upper
5944 bound on the address range. We could perhaps use length attributes
5945 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5946 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5949 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5950 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5952 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5955 fputc ('\n', asm_out_file);
5956 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5957 fputc ('\n', asm_out_file);
5961 /* This can handle any delta. This takes
5962 4+DWARF2_ADDR_SIZE bytes. */
5963 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5965 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5967 fputc ('\n', asm_out_file);
5968 output_uleb128 (1 + DWARF2_ADDR_SIZE);
5969 fputc ('\n', asm_out_file);
5970 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5971 fputc ('\n', asm_out_file);
5972 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5973 fputc ('\n', asm_out_file);
5975 strcpy (prev_line_label, line_label);
5977 /* Emit debug info for the source file of the current line, if
5978 different from the previous line. */
5979 if (line_info->dw_file_num != current_file)
5981 current_file = line_info->dw_file_num;
5982 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5984 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5986 fputc ('\n', asm_out_file);
5987 output_uleb128 (current_file);
5989 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5991 fputc ('\n', asm_out_file);
5994 /* Emit debug info for the current line number, choosing the encoding
5995 that uses the least amount of space. */
5996 if (line_info->dw_line_num != current_line)
5998 line_offset = line_info->dw_line_num - current_line;
5999 line_delta = line_offset - DWARF_LINE_BASE;
6000 current_line = line_info->dw_line_num;
6001 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6003 /* This can handle deltas from -10 to 234, using the current
6004 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
6006 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6007 DWARF_LINE_OPCODE_BASE + line_delta);
6009 fprintf (asm_out_file,
6010 "\t%s line %ld", ASM_COMMENT_START, current_line);
6012 fputc ('\n', asm_out_file);
6016 /* This can handle any delta. This takes at least 4 bytes,
6017 depending on the value being encoded. */
6018 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6020 fprintf (asm_out_file, "\t%s advance to line %ld",
6021 ASM_COMMENT_START, current_line);
6023 fputc ('\n', asm_out_file);
6024 output_sleb128 (line_offset);
6025 fputc ('\n', asm_out_file);
6026 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6028 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6029 fputc ('\n', asm_out_file);
6034 /* We still need to start a new row, so output a copy insn. */
6035 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6037 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6038 fputc ('\n', asm_out_file);
6042 /* Emit debug info for the address of the end of the function. */
6045 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6047 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6050 fputc ('\n', asm_out_file);
6051 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
6052 fputc ('\n', asm_out_file);
6056 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6058 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
6059 fputc ('\n', asm_out_file);
6060 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6061 fputc ('\n', asm_out_file);
6062 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6063 fputc ('\n', asm_out_file);
6064 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
6065 fputc ('\n', asm_out_file);
6068 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6070 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
6072 fputc ('\n', asm_out_file);
6074 fputc ('\n', asm_out_file);
6075 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6076 fputc ('\n', asm_out_file);
6081 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
6083 register dw_separate_line_info_ref line_info
6084 = &separate_line_info_table[lt_index];
6087 /* Don't emit anything for redundant notes. */
6088 if (line_info->dw_line_num == current_line
6089 && line_info->dw_file_num == current_file
6090 && line_info->function == function)
6094 /* Emit debug info for the address of the current line. If this is
6095 a new function, or the first line of a function, then we need
6096 to handle it differently. */
6097 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
6099 if (function != line_info->function)
6101 function = line_info->function;
6103 /* Set the address register to the first line in the function */
6104 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6106 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6109 fputc ('\n', asm_out_file);
6110 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6111 fputc ('\n', asm_out_file);
6112 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6113 fputc ('\n', asm_out_file);
6114 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6115 fputc ('\n', asm_out_file);
6119 /* ??? See the DW_LNS_advance_pc comment above. */
6122 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6124 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6127 fputc ('\n', asm_out_file);
6128 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6130 fputc ('\n', asm_out_file);
6134 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6136 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6138 fputc ('\n', asm_out_file);
6139 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6140 fputc ('\n', asm_out_file);
6141 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6142 fputc ('\n', asm_out_file);
6143 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6144 fputc ('\n', asm_out_file);
6147 strcpy (prev_line_label, line_label);
6149 /* Emit debug info for the source file of the current line, if
6150 different from the previous line. */
6151 if (line_info->dw_file_num != current_file)
6153 current_file = line_info->dw_file_num;
6154 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
6156 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
6158 fputc ('\n', asm_out_file);
6159 output_uleb128 (current_file);
6161 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
6163 fputc ('\n', asm_out_file);
6166 /* Emit debug info for the current line number, choosing the encoding
6167 that uses the least amount of space. */
6168 if (line_info->dw_line_num != current_line)
6170 line_offset = line_info->dw_line_num - current_line;
6171 line_delta = line_offset - DWARF_LINE_BASE;
6172 current_line = line_info->dw_line_num;
6173 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6175 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6176 DWARF_LINE_OPCODE_BASE + line_delta);
6178 fprintf (asm_out_file,
6179 "\t%s line %ld", ASM_COMMENT_START, current_line);
6181 fputc ('\n', asm_out_file);
6185 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6187 fprintf (asm_out_file, "\t%s advance to line %ld",
6188 ASM_COMMENT_START, current_line);
6190 fputc ('\n', asm_out_file);
6191 output_sleb128 (line_offset);
6192 fputc ('\n', asm_out_file);
6193 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6195 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6196 fputc ('\n', asm_out_file);
6201 /* We still need to start a new row, so output a copy insn. */
6202 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6204 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6205 fputc ('\n', asm_out_file);
6213 /* If we're done with a function, end its sequence. */
6214 if (lt_index == separate_line_info_table_in_use
6215 || separate_line_info_table[lt_index].function != function)
6220 /* Emit debug info for the address of the end of the function. */
6221 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6224 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6226 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6229 fputc ('\n', asm_out_file);
6230 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6232 fputc ('\n', asm_out_file);
6236 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6238 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6240 fputc ('\n', asm_out_file);
6241 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6242 fputc ('\n', asm_out_file);
6243 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6244 fputc ('\n', asm_out_file);
6245 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6246 fputc ('\n', asm_out_file);
6249 /* Output the marker for the end of this sequence. */
6250 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6252 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6255 fputc ('\n', asm_out_file);
6257 fputc ('\n', asm_out_file);
6258 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6259 fputc ('\n', asm_out_file);
6263 /* Output the marker for the end of the line number info. */
6264 ASM_OUTPUT_LABEL (asm_out_file, ".LTEND");
6267 /* Given a pointer to a tree node for some base type, return a pointer to
6268 a DIE that describes the given type.
6270 This routine must only be called for GCC type nodes that correspond to
6271 Dwarf base (fundamental) types. */
6274 base_type_die (type)
6277 register dw_die_ref base_type_result;
6278 register const char *type_name;
6279 register enum dwarf_type encoding;
6280 register tree name = TYPE_NAME (type);
6282 if (TREE_CODE (type) == ERROR_MARK
6283 || TREE_CODE (type) == VOID_TYPE)
6288 if (TREE_CODE (name) == TYPE_DECL)
6289 name = DECL_NAME (name);
6291 type_name = IDENTIFIER_POINTER (name);
6294 type_name = "__unknown__";
6296 switch (TREE_CODE (type))
6299 /* Carefully distinguish the C character types, without messing
6300 up if the language is not C. Note that we check only for the names
6301 that contain spaces; other names might occur by coincidence in other
6303 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6304 && (type == char_type_node
6305 || ! strcmp (type_name, "signed char")
6306 || ! strcmp (type_name, "unsigned char"))))
6308 if (TREE_UNSIGNED (type))
6309 encoding = DW_ATE_unsigned;
6311 encoding = DW_ATE_signed;
6314 /* else fall through */
6317 /* GNU Pascal/Ada CHAR type. Not used in C. */
6318 if (TREE_UNSIGNED (type))
6319 encoding = DW_ATE_unsigned_char;
6321 encoding = DW_ATE_signed_char;
6325 encoding = DW_ATE_float;
6328 /* Dwarf2 doesn't know anything about complex ints, so use
6329 a user defined type for it. */
6331 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
6332 encoding = DW_ATE_complex_float;
6334 encoding = DW_ATE_lo_user;
6338 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6339 encoding = DW_ATE_boolean;
6343 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6346 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6347 if (demangle_name_func)
6348 type_name = (*demangle_name_func) (type_name);
6350 add_AT_string (base_type_result, DW_AT_name, type_name);
6351 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6352 int_size_in_bytes (type));
6353 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6355 return base_type_result;
6358 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6359 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6360 a given type is generally the same as the given type, except that if the
6361 given type is a pointer or reference type, then the root type of the given
6362 type is the root type of the "basis" type for the pointer or reference
6363 type. (This definition of the "root" type is recursive.) Also, the root
6364 type of a `const' qualified type or a `volatile' qualified type is the
6365 root type of the given type without the qualifiers. */
6371 if (TREE_CODE (type) == ERROR_MARK)
6372 return error_mark_node;
6374 switch (TREE_CODE (type))
6377 return error_mark_node;
6380 case REFERENCE_TYPE:
6381 return type_main_variant (root_type (TREE_TYPE (type)));
6384 return type_main_variant (type);
6388 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6389 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6395 switch (TREE_CODE (type))
6410 case QUAL_UNION_TYPE:
6415 case REFERENCE_TYPE:
6428 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6429 entry that chains various modifiers in front of the given type. */
6432 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6434 register int is_const_type;
6435 register int is_volatile_type;
6436 register dw_die_ref context_die;
6438 register enum tree_code code = TREE_CODE (type);
6439 register dw_die_ref mod_type_die = NULL;
6440 register dw_die_ref sub_die = NULL;
6441 register tree item_type = NULL;
6443 if (code != ERROR_MARK)
6445 type = build_type_variant (type, is_const_type, is_volatile_type);
6447 mod_type_die = lookup_type_die (type);
6449 return mod_type_die;
6451 /* Handle C typedef types. */
6452 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6453 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6455 tree dtype = TREE_TYPE (TYPE_NAME (type));
6458 /* For a named type, use the typedef. */
6459 gen_type_die (type, context_die);
6460 mod_type_die = lookup_type_die (type);
6463 else if (is_const_type < TYPE_READONLY (dtype)
6464 || is_volatile_type < TYPE_VOLATILE (dtype))
6465 /* cv-unqualified version of named type. Just use the unnamed
6466 type to which it refers. */
6468 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6469 is_const_type, is_volatile_type,
6471 /* Else cv-qualified version of named type; fall through. */
6476 else if (is_const_type)
6478 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6479 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6481 else if (is_volatile_type)
6483 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6484 sub_die = modified_type_die (type, 0, 0, context_die);
6486 else if (code == POINTER_TYPE)
6488 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6489 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6491 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6493 item_type = TREE_TYPE (type);
6495 else if (code == REFERENCE_TYPE)
6497 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6498 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6500 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6502 item_type = TREE_TYPE (type);
6504 else if (is_base_type (type))
6505 mod_type_die = base_type_die (type);
6508 gen_type_die (type, context_die);
6510 /* We have to get the type_main_variant here (and pass that to the
6511 `lookup_type_die' routine) because the ..._TYPE node we have
6512 might simply be a *copy* of some original type node (where the
6513 copy was created to help us keep track of typedef names) and
6514 that copy might have a different TYPE_UID from the original
6516 mod_type_die = lookup_type_die (type_main_variant (type));
6517 if (mod_type_die == NULL)
6522 equate_type_number_to_die (type, mod_type_die);
6524 /* We must do this after the equate_type_number_to_die call, in case
6525 this is a recursive type. This ensures that the modified_type_die
6526 recursion will terminate even if the type is recursive. Recursive
6527 types are possible in Ada. */
6528 sub_die = modified_type_die (item_type,
6529 TYPE_READONLY (item_type),
6530 TYPE_VOLATILE (item_type),
6533 if (sub_die != NULL)
6534 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6536 return mod_type_die;
6539 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6540 an enumerated type. */
6546 return TREE_CODE (type) == ENUMERAL_TYPE;
6549 /* Return the register number described by a given RTL node. */
6555 register unsigned regno = REGNO (rtl);
6557 if (regno >= FIRST_PSEUDO_REGISTER)
6559 warning ("internal regno botch: regno = %d\n", regno);
6563 regno = DBX_REGISTER_NUMBER (regno);
6567 /* Return a location descriptor that designates a machine register. */
6569 static dw_loc_descr_ref
6570 reg_loc_descriptor (rtl)
6573 register dw_loc_descr_ref loc_result = NULL;
6574 register unsigned reg = reg_number (rtl);
6577 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6579 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6584 /* Return a location descriptor that designates a base+offset location. */
6586 static dw_loc_descr_ref
6587 based_loc_descr (reg, offset)
6591 register dw_loc_descr_ref loc_result;
6592 /* For the "frame base", we use the frame pointer or stack pointer
6593 registers, since the RTL for local variables is relative to one of
6595 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6596 ? HARD_FRAME_POINTER_REGNUM
6597 : STACK_POINTER_REGNUM);
6600 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6602 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6604 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6609 /* Return true if this RTL expression describes a base+offset calculation. */
6615 return (GET_CODE (rtl) == PLUS
6616 && ((GET_CODE (XEXP (rtl, 0)) == REG
6617 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6620 /* The following routine converts the RTL for a variable or parameter
6621 (resident in memory) into an equivalent Dwarf representation of a
6622 mechanism for getting the address of that same variable onto the top of a
6623 hypothetical "address evaluation" stack.
6625 When creating memory location descriptors, we are effectively transforming
6626 the RTL for a memory-resident object into its Dwarf postfix expression
6627 equivalent. This routine recursively descends an RTL tree, turning
6628 it into Dwarf postfix code as it goes.
6630 MODE is the mode of the memory reference, needed to handle some
6631 autoincrement addressing modes. */
6633 static dw_loc_descr_ref
6634 mem_loc_descriptor (rtl, mode)
6636 enum machine_mode mode;
6638 dw_loc_descr_ref mem_loc_result = NULL;
6639 /* Note that for a dynamically sized array, the location we will generate a
6640 description of here will be the lowest numbered location which is
6641 actually within the array. That's *not* necessarily the same as the
6642 zeroth element of the array. */
6644 #ifdef ASM_SIMPLIFY_DWARF_ADDR
6645 rtl = ASM_SIMPLIFY_DWARF_ADDR (rtl);
6648 switch (GET_CODE (rtl))
6652 /* POST_INC and POST_DEC can be handled just like a SUBREG. So we
6653 just fall into the SUBREG code. */
6655 /* ... fall through ... */
6658 /* The case of a subreg may arise when we have a local (register)
6659 variable or a formal (register) parameter which doesn't quite fill
6660 up an entire register. For now, just assume that it is
6661 legitimate to make the Dwarf info refer to the whole register which
6662 contains the given subreg. */
6663 rtl = XEXP (rtl, 0);
6665 /* ... fall through ... */
6668 /* Whenever a register number forms a part of the description of the
6669 method for calculating the (dynamic) address of a memory resident
6670 object, DWARF rules require the register number be referred to as
6671 a "base register". This distinction is not based in any way upon
6672 what category of register the hardware believes the given register
6673 belongs to. This is strictly DWARF terminology we're dealing with
6674 here. Note that in cases where the location of a memory-resident
6675 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6676 OP_CONST (0)) the actual DWARF location descriptor that we generate
6677 may just be OP_BASEREG (basereg). This may look deceptively like
6678 the object in question was allocated to a register (rather than in
6679 memory) so DWARF consumers need to be aware of the subtle
6680 distinction between OP_REG and OP_BASEREG. */
6681 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6685 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode);
6686 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6690 /* Some ports can transform a symbol ref into a label ref, because
6691 the symbol ref is too far away and has to be dumped into a constant
6695 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6696 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6697 mem_loc_result->dw_loc_oprnd1.v.val_addr = save_rtx (rtl);
6702 /* Turn these into a PLUS expression and fall into the PLUS code
6704 rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0),
6705 GEN_INT (GET_CODE (rtl) == PRE_INC
6706 ? GET_MODE_UNIT_SIZE (mode)
6707 : - GET_MODE_UNIT_SIZE (mode)));
6709 /* ... fall through ... */
6712 if (is_based_loc (rtl))
6713 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6714 INTVAL (XEXP (rtl, 1)));
6717 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0),
6719 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1),
6721 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6726 /* If a pseudo-reg is optimized away, it is possible for it to
6727 be replaced with a MEM containing a multiply. */
6728 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0), mode));
6729 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1), mode));
6730 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6734 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6741 return mem_loc_result;
6744 /* Return a descriptor that describes the concatenation of two locations.
6745 This is typically a complex variable. */
6747 static dw_loc_descr_ref
6748 concat_loc_descriptor (x0, x1)
6749 register rtx x0, x1;
6751 dw_loc_descr_ref cc_loc_result = NULL;
6753 if (!is_pseudo_reg (x0)
6754 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6755 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6756 add_loc_descr (&cc_loc_result,
6757 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6759 if (!is_pseudo_reg (x1)
6760 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6761 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6762 add_loc_descr (&cc_loc_result,
6763 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6765 return cc_loc_result;
6768 /* Output a proper Dwarf location descriptor for a variable or parameter
6769 which is either allocated in a register or in a memory location. For a
6770 register, we just generate an OP_REG and the register number. For a
6771 memory location we provide a Dwarf postfix expression describing how to
6772 generate the (dynamic) address of the object onto the address stack. */
6774 static dw_loc_descr_ref
6775 loc_descriptor (rtl)
6778 dw_loc_descr_ref loc_result = NULL;
6779 switch (GET_CODE (rtl))
6782 /* The case of a subreg may arise when we have a local (register)
6783 variable or a formal (register) parameter which doesn't quite fill
6784 up an entire register. For now, just assume that it is
6785 legitimate to make the Dwarf info refer to the whole register which
6786 contains the given subreg. */
6787 rtl = XEXP (rtl, 0);
6789 /* ... fall through ... */
6792 loc_result = reg_loc_descriptor (rtl);
6796 loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl));
6800 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6810 /* Given a value, round it up to the lowest multiple of `boundary'
6811 which is not less than the value itself. */
6813 static inline HOST_WIDE_INT
6814 ceiling (value, boundary)
6815 HOST_WIDE_INT value;
6816 unsigned int boundary;
6818 return (((value + boundary - 1) / boundary) * boundary);
6821 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6822 pointer to the declared type for the relevant field variable, or return
6823 `integer_type_node' if the given node turns out to be an
6832 if (TREE_CODE (decl) == ERROR_MARK)
6833 return integer_type_node;
6835 type = DECL_BIT_FIELD_TYPE (decl);
6836 if (type == NULL_TREE)
6837 type = TREE_TYPE (decl);
6842 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6843 node, return the alignment in bits for the type, or else return
6844 BITS_PER_WORD if the node actually turns out to be an
6847 static inline unsigned
6848 simple_type_align_in_bits (type)
6851 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6854 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6855 node, return the size in bits for the type if it is a constant, or else
6856 return the alignment for the type if the type's size is not constant, or
6857 else return BITS_PER_WORD if the type actually turns out to be an
6860 static inline unsigned HOST_WIDE_INT
6861 simple_type_size_in_bits (type)
6864 if (TREE_CODE (type) == ERROR_MARK)
6865 return BITS_PER_WORD;
6868 register tree type_size_tree = TYPE_SIZE (type);
6870 if (! host_integerp (type_size_tree, 1))
6871 return TYPE_ALIGN (type);
6873 return tree_low_cst (type_size_tree, 1);
6877 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6878 return the byte offset of the lowest addressed byte of the "containing
6879 object" for the given FIELD_DECL, or return 0 if we are unable to
6880 determine what that offset is, either because the argument turns out to
6881 be a pointer to an ERROR_MARK node, or because the offset is actually
6882 variable. (We can't handle the latter case just yet). */
6884 static HOST_WIDE_INT
6885 field_byte_offset (decl)
6888 unsigned int type_align_in_bytes;
6889 unsigned int type_align_in_bits;
6890 unsigned HOST_WIDE_INT type_size_in_bits;
6891 HOST_WIDE_INT object_offset_in_align_units;
6892 HOST_WIDE_INT object_offset_in_bits;
6893 HOST_WIDE_INT object_offset_in_bytes;
6895 tree field_size_tree;
6896 HOST_WIDE_INT bitpos_int;
6897 HOST_WIDE_INT deepest_bitpos;
6898 unsigned HOST_WIDE_INT field_size_in_bits;
6900 if (TREE_CODE (decl) == ERROR_MARK)
6903 if (TREE_CODE (decl) != FIELD_DECL)
6906 type = field_type (decl);
6907 field_size_tree = DECL_SIZE (decl);
6909 /* If there was an error, the size could be zero. */
6910 if (! field_size_tree)
6918 /* We cannot yet cope with fields whose positions are variable, so
6919 for now, when we see such things, we simply return 0. Someday, we may
6920 be able to handle such cases, but it will be damn difficult. */
6921 if (! host_integerp (bit_position (decl), 0))
6924 bitpos_int = int_bit_position (decl);
6926 /* If we don't know the size of the field, pretend it's a full word. */
6927 if (host_integerp (field_size_tree, 1))
6928 field_size_in_bits = tree_low_cst (field_size_tree, 1);
6930 field_size_in_bits = BITS_PER_WORD;
6932 type_size_in_bits = simple_type_size_in_bits (type);
6933 type_align_in_bits = simple_type_align_in_bits (type);
6934 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6936 /* Note that the GCC front-end doesn't make any attempt to keep track of
6937 the starting bit offset (relative to the start of the containing
6938 structure type) of the hypothetical "containing object" for a bit-
6939 field. Thus, when computing the byte offset value for the start of the
6940 "containing object" of a bit-field, we must deduce this information on
6941 our own. This can be rather tricky to do in some cases. For example,
6942 handling the following structure type definition when compiling for an
6943 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6946 struct S { int field1; long long field2:31; };
6948 Fortunately, there is a simple rule-of-thumb which can be
6949 used in such cases. When compiling for an i386/i486, GCC will allocate
6950 8 bytes for the structure shown above. It decides to do this based upon
6951 one simple rule for bit-field allocation. Quite simply, GCC allocates
6952 each "containing object" for each bit-field at the first (i.e. lowest
6953 addressed) legitimate alignment boundary (based upon the required
6954 minimum alignment for the declared type of the field) which it can
6955 possibly use, subject to the condition that there is still enough
6956 available space remaining in the containing object (when allocated at
6957 the selected point) to fully accommodate all of the bits of the
6958 bit-field itself. This simple rule makes it obvious why GCC allocates
6959 8 bytes for each object of the structure type shown above. When looking
6960 for a place to allocate the "containing object" for `field2', the
6961 compiler simply tries to allocate a 64-bit "containing object" at each
6962 successive 32-bit boundary (starting at zero) until it finds a place to
6963 allocate that 64- bit field such that at least 31 contiguous (and
6964 previously unallocated) bits remain within that selected 64 bit field.
6965 (As it turns out, for the example above, the compiler finds that it is
6966 OK to allocate the "containing object" 64-bit field at bit-offset zero
6967 within the structure type.) Here we attempt to work backwards from the
6968 limited set of facts we're given, and we try to deduce from those facts,
6969 where GCC must have believed that the containing object started (within
6970 the structure type). The value we deduce is then used (by the callers of
6971 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6972 for fields (both bit-fields and, in the case of DW_AT_location, regular
6975 /* Figure out the bit-distance from the start of the structure to the
6976 "deepest" bit of the bit-field. */
6977 deepest_bitpos = bitpos_int + field_size_in_bits;
6979 /* This is the tricky part. Use some fancy footwork to deduce where the
6980 lowest addressed bit of the containing object must be. */
6981 object_offset_in_bits
6982 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6984 /* Compute the offset of the containing object in "alignment units". */
6985 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6987 /* Compute the offset of the containing object in bytes. */
6988 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6990 return object_offset_in_bytes;
6993 /* The following routines define various Dwarf attributes and any data
6994 associated with them. */
6996 /* Add a location description attribute value to a DIE.
6998 This emits location attributes suitable for whole variables and
6999 whole parameters. Note that the location attributes for struct fields are
7000 generated by the routine `data_member_location_attribute' below. */
7003 add_AT_location_description (die, attr_kind, rtl)
7005 enum dwarf_attribute attr_kind;
7008 /* Handle a special case. If we are about to output a location descriptor
7009 for a variable or parameter which has been optimized out of existence,
7010 don't do that. A variable which has been optimized out
7011 of existence will have a DECL_RTL value which denotes a pseudo-reg.
7012 Currently, in some rare cases, variables can have DECL_RTL values which
7013 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
7014 elsewhere in the compiler. We treat such cases as if the variable(s) in
7015 question had been optimized out of existence. */
7017 if (is_pseudo_reg (rtl)
7018 || (GET_CODE (rtl) == MEM
7019 && is_pseudo_reg (XEXP (rtl, 0)))
7020 /* This can happen for a PARM_DECL with a DECL_INCOMING_RTL which
7021 references the internal argument pointer (a pseudo) in a function
7022 where all references to the internal argument pointer were
7023 eliminated via the optimizers. */
7024 || (GET_CODE (rtl) == MEM
7025 && GET_CODE (XEXP (rtl, 0)) == PLUS
7026 && is_pseudo_reg (XEXP (XEXP (rtl, 0), 0)))
7027 || (GET_CODE (rtl) == CONCAT
7028 && is_pseudo_reg (XEXP (rtl, 0))
7029 && is_pseudo_reg (XEXP (rtl, 1))))
7032 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
7035 /* Attach the specialized form of location attribute used for data
7036 members of struct and union types. In the special case of a
7037 FIELD_DECL node which represents a bit-field, the "offset" part
7038 of this special location descriptor must indicate the distance
7039 in bytes from the lowest-addressed byte of the containing struct
7040 or union type to the lowest-addressed byte of the "containing
7041 object" for the bit-field. (See the `field_byte_offset' function
7042 above).. For any given bit-field, the "containing object" is a
7043 hypothetical object (of some integral or enum type) within which
7044 the given bit-field lives. The type of this hypothetical
7045 "containing object" is always the same as the declared type of
7046 the individual bit-field itself (for GCC anyway... the DWARF
7047 spec doesn't actually mandate this). Note that it is the size
7048 (in bytes) of the hypothetical "containing object" which will
7049 be given in the DW_AT_byte_size attribute for this bit-field.
7050 (See the `byte_size_attribute' function below.) It is also used
7051 when calculating the value of the DW_AT_bit_offset attribute.
7052 (See the `bit_offset_attribute' function below). */
7055 add_data_member_location_attribute (die, decl)
7056 register dw_die_ref die;
7059 register unsigned long offset;
7060 register dw_loc_descr_ref loc_descr;
7061 register enum dwarf_location_atom op;
7063 if (TREE_CODE (decl) == TREE_VEC)
7064 offset = tree_low_cst (BINFO_OFFSET (decl), 0);
7066 offset = field_byte_offset (decl);
7068 /* The DWARF2 standard says that we should assume that the structure address
7069 is already on the stack, so we can specify a structure field address
7070 by using DW_OP_plus_uconst. */
7072 #ifdef MIPS_DEBUGGING_INFO
7073 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
7074 correctly. It works only if we leave the offset on the stack. */
7077 op = DW_OP_plus_uconst;
7080 loc_descr = new_loc_descr (op, offset, 0);
7081 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
7084 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
7085 does not have a "location" either in memory or in a register. These
7086 things can arise in GNU C when a constant is passed as an actual parameter
7087 to an inlined function. They can also arise in C++ where declared
7088 constants do not necessarily get memory "homes". */
7091 add_const_value_attribute (die, rtl)
7092 register dw_die_ref die;
7095 switch (GET_CODE (rtl))
7098 /* Note that a CONST_INT rtx could represent either an integer or a
7099 floating-point constant. A CONST_INT is used whenever the constant
7100 will fit into a single word. In all such cases, the original mode
7101 of the constant value is wiped out, and the CONST_INT rtx is
7102 assigned VOIDmode. */
7103 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
7107 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
7108 floating-point constant. A CONST_DOUBLE is used whenever the
7109 constant requires more than one word in order to be adequately
7110 represented. We output CONST_DOUBLEs as blocks. */
7112 register enum machine_mode mode = GET_MODE (rtl);
7114 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
7116 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
7120 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
7124 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
7128 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
7133 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
7140 add_AT_float (die, DW_AT_const_value, length, array);
7143 add_AT_long_long (die, DW_AT_const_value,
7144 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
7149 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
7155 add_AT_addr (die, DW_AT_const_value, save_rtx (rtl));
7159 /* In cases where an inlined instance of an inline function is passed
7160 the address of an `auto' variable (which is local to the caller) we
7161 can get a situation where the DECL_RTL of the artificial local
7162 variable (for the inlining) which acts as a stand-in for the
7163 corresponding formal parameter (of the inline function) will look
7164 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
7165 exactly a compile-time constant expression, but it isn't the address
7166 of the (artificial) local variable either. Rather, it represents the
7167 *value* which the artificial local variable always has during its
7168 lifetime. We currently have no way to represent such quasi-constant
7169 values in Dwarf, so for now we just punt and generate nothing. */
7173 /* No other kinds of rtx should be possible here. */
7179 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
7180 data attribute for a variable or a parameter. We generate the
7181 DW_AT_const_value attribute only in those cases where the given variable
7182 or parameter does not have a true "location" either in memory or in a
7183 register. This can happen (for example) when a constant is passed as an
7184 actual argument in a call to an inline function. (It's possible that
7185 these things can crop up in other ways also.) Note that one type of
7186 constant value which can be passed into an inlined function is a constant
7187 pointer. This can happen for example if an actual argument in an inlined
7188 function call evaluates to a compile-time constant address. */
7191 add_location_or_const_value_attribute (die, decl)
7192 register dw_die_ref die;
7196 register tree declared_type;
7197 register tree passed_type;
7199 if (TREE_CODE (decl) == ERROR_MARK)
7202 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
7205 /* Here we have to decide where we are going to say the parameter "lives"
7206 (as far as the debugger is concerned). We only have a couple of
7207 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
7209 DECL_RTL normally indicates where the parameter lives during most of the
7210 activation of the function. If optimization is enabled however, this
7211 could be either NULL or else a pseudo-reg. Both of those cases indicate
7212 that the parameter doesn't really live anywhere (as far as the code
7213 generation parts of GCC are concerned) during most of the function's
7214 activation. That will happen (for example) if the parameter is never
7215 referenced within the function.
7217 We could just generate a location descriptor here for all non-NULL
7218 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
7219 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
7220 where DECL_RTL is NULL or is a pseudo-reg.
7222 Note however that we can only get away with using DECL_INCOMING_RTL as
7223 a backup substitute for DECL_RTL in certain limited cases. In cases
7224 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7225 we can be sure that the parameter was passed using the same type as it is
7226 declared to have within the function, and that its DECL_INCOMING_RTL
7227 points us to a place where a value of that type is passed.
7229 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7230 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7231 because in these cases DECL_INCOMING_RTL points us to a value of some
7232 type which is *different* from the type of the parameter itself. Thus,
7233 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7234 such cases, the debugger would end up (for example) trying to fetch a
7235 `float' from a place which actually contains the first part of a
7236 `double'. That would lead to really incorrect and confusing
7237 output at debug-time.
7239 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7240 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7241 are a couple of exceptions however. On little-endian machines we can
7242 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7243 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7244 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7245 when (on a little-endian machine) a non-prototyped function has a
7246 parameter declared to be of type `short' or `char'. In such cases,
7247 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7248 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7249 passed `int' value. If the debugger then uses that address to fetch
7250 a `short' or a `char' (on a little-endian machine) the result will be
7251 the correct data, so we allow for such exceptional cases below.
7253 Note that our goal here is to describe the place where the given formal
7254 parameter lives during most of the function's activation (i.e. between
7255 the end of the prologue and the start of the epilogue). We'll do that
7256 as best as we can. Note however that if the given formal parameter is
7257 modified sometime during the execution of the function, then a stack
7258 backtrace (at debug-time) will show the function as having been
7259 called with the *new* value rather than the value which was
7260 originally passed in. This happens rarely enough that it is not
7261 a major problem, but it *is* a problem, and I'd like to fix it.
7263 A future version of dwarf2out.c may generate two additional
7264 attributes for any given DW_TAG_formal_parameter DIE which will
7265 describe the "passed type" and the "passed location" for the
7266 given formal parameter in addition to the attributes we now
7267 generate to indicate the "declared type" and the "active
7268 location" for each parameter. This additional set of attributes
7269 could be used by debuggers for stack backtraces. Separately, note
7270 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7271 NULL also. This happens (for example) for inlined-instances of
7272 inline function formal parameters which are never referenced.
7273 This really shouldn't be happening. All PARM_DECL nodes should
7274 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7275 doesn't currently generate these values for inlined instances of
7276 inline function parameters, so when we see such cases, we are
7277 just out-of-luck for the time being (until integrate.c
7280 /* Use DECL_RTL as the "location" unless we find something better. */
7281 rtl = DECL_RTL (decl);
7283 if (TREE_CODE (decl) == PARM_DECL)
7285 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7287 declared_type = type_main_variant (TREE_TYPE (decl));
7288 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7290 /* This decl represents a formal parameter which was optimized out.
7291 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7292 all* cases where (rtl == NULL_RTX) just below. */
7293 if (declared_type == passed_type)
7294 rtl = DECL_INCOMING_RTL (decl);
7295 else if (! BYTES_BIG_ENDIAN
7296 && TREE_CODE (declared_type) == INTEGER_TYPE
7297 && (GET_MODE_SIZE (TYPE_MODE (declared_type))
7298 <= GET_MODE_SIZE (TYPE_MODE (passed_type))))
7299 rtl = DECL_INCOMING_RTL (decl);
7302 /* If the parm was passed in registers, but lives on the stack, then
7303 make a big endian correction if the mode of the type of the
7304 parameter is not the same as the mode of the rtl. */
7305 /* ??? This is the same series of checks that are made in dbxout.c before
7306 we reach the big endian correction code there. It isn't clear if all
7307 of these checks are necessary here, but keeping them all is the safe
7309 else if (GET_CODE (rtl) == MEM
7310 && XEXP (rtl, 0) != const0_rtx
7311 && ! CONSTANT_P (XEXP (rtl, 0))
7312 /* Not passed in memory. */
7313 && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM
7314 /* Not passed by invisible reference. */
7315 && (GET_CODE (XEXP (rtl, 0)) != REG
7316 || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM
7317 || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM
7318 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
7319 || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM
7322 /* Big endian correction check. */
7324 && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl)
7325 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))
7328 int offset = (UNITS_PER_WORD
7329 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))));
7330 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
7331 plus_constant (XEXP (rtl, 0), offset));
7335 if (rtl == NULL_RTX)
7338 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7339 #ifdef LEAF_REG_REMAP
7340 if (current_function_uses_only_leaf_regs)
7341 leaf_renumber_regs_insn (rtl);
7344 switch (GET_CODE (rtl))
7347 /* The address of a variable that was optimized away; don't emit
7358 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7359 add_const_value_attribute (die, rtl);
7366 add_AT_location_description (die, DW_AT_location, rtl);
7374 /* Generate an DW_AT_name attribute given some string value to be included as
7375 the value of the attribute. */
7378 add_name_attribute (die, name_string)
7379 register dw_die_ref die;
7380 register const char *name_string;
7382 if (name_string != NULL && *name_string != 0)
7384 if (demangle_name_func)
7385 name_string = (*demangle_name_func) (name_string);
7387 add_AT_string (die, DW_AT_name, name_string);
7391 /* Given a tree node describing an array bound (either lower or upper) output
7392 a representation for that bound. */
7395 add_bound_info (subrange_die, bound_attr, bound)
7396 register dw_die_ref subrange_die;
7397 register enum dwarf_attribute bound_attr;
7398 register tree bound;
7400 /* If this is an Ada unconstrained array type, then don't emit any debug
7401 info because the array bounds are unknown. They are parameterized when
7402 the type is instantiated. */
7403 if (contains_placeholder_p (bound))
7406 switch (TREE_CODE (bound))
7411 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7413 if (! host_integerp (bound, 0)
7414 || (bound_attr == DW_AT_lower_bound
7415 && ((is_c_family () && integer_zerop (bound))
7416 || (is_fortran () && integer_onep (bound)))))
7417 /* use the default */
7420 add_AT_unsigned (subrange_die, bound_attr, tree_low_cst (bound, 0));
7425 case NON_LVALUE_EXPR:
7426 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7430 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7431 access the upper bound values may be bogus. If they refer to a
7432 register, they may only describe how to get at these values at the
7433 points in the generated code right after they have just been
7434 computed. Worse yet, in the typical case, the upper bound values
7435 will not even *be* computed in the optimized code (though the
7436 number of elements will), so these SAVE_EXPRs are entirely
7437 bogus. In order to compensate for this fact, we check here to see
7438 if optimization is enabled, and if so, we don't add an attribute
7439 for the (unknown and unknowable) upper bound. This should not
7440 cause too much trouble for existing (stupid?) debuggers because
7441 they have to deal with empty upper bounds location descriptions
7442 anyway in order to be able to deal with incomplete array types.
7443 Of course an intelligent debugger (GDB?) should be able to
7444 comprehend that a missing upper bound specification in a array
7445 type used for a storage class `auto' local array variable
7446 indicates that the upper bound is both unknown (at compile- time)
7447 and unknowable (at run-time) due to optimization.
7449 We assume that a MEM rtx is safe because gcc wouldn't put the
7450 value there unless it was going to be used repeatedly in the
7451 function, i.e. for cleanups. */
7452 if (! optimize || (SAVE_EXPR_RTL (bound)
7453 && GET_CODE (SAVE_EXPR_RTL (bound)) == MEM))
7455 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7456 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7457 register rtx loc = SAVE_EXPR_RTL (bound);
7459 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7460 it references an outer function's frame. */
7462 if (GET_CODE (loc) == MEM)
7464 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7466 if (XEXP (loc, 0) != new_addr)
7467 loc = gen_rtx_MEM (GET_MODE (loc), new_addr);
7470 add_AT_flag (decl_die, DW_AT_artificial, 1);
7471 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7472 add_AT_location_description (decl_die, DW_AT_location, loc);
7473 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7476 /* Else leave out the attribute. */
7482 /* ??? These types of bounds can be created by the Ada front end,
7483 and it isn't clear how to emit debug info for them. */
7491 /* Note that the block of subscript information for an array type also
7492 includes information about the element type of type given array type. */
7495 add_subscript_info (type_die, type)
7496 register dw_die_ref type_die;
7499 #ifndef MIPS_DEBUGGING_INFO
7500 register unsigned dimension_number;
7502 register tree lower, upper;
7503 register dw_die_ref subrange_die;
7505 /* The GNU compilers represent multidimensional array types as sequences of
7506 one dimensional array types whose element types are themselves array
7507 types. Here we squish that down, so that each multidimensional array
7508 type gets only one array_type DIE in the Dwarf debugging info. The draft
7509 Dwarf specification say that we are allowed to do this kind of
7510 compression in C (because there is no difference between an array or
7511 arrays and a multidimensional array in C) but for other source languages
7512 (e.g. Ada) we probably shouldn't do this. */
7514 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7515 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7516 We work around this by disabling this feature. See also
7517 gen_array_type_die. */
7518 #ifndef MIPS_DEBUGGING_INFO
7519 for (dimension_number = 0;
7520 TREE_CODE (type) == ARRAY_TYPE;
7521 type = TREE_TYPE (type), dimension_number++)
7524 register tree domain = TYPE_DOMAIN (type);
7526 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7527 and (in GNU C only) variable bounds. Handle all three forms
7529 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7532 /* We have an array type with specified bounds. */
7533 lower = TYPE_MIN_VALUE (domain);
7534 upper = TYPE_MAX_VALUE (domain);
7536 /* define the index type. */
7537 if (TREE_TYPE (domain))
7539 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7540 TREE_TYPE field. We can't emit debug info for this
7541 because it is an unnamed integral type. */
7542 if (TREE_CODE (domain) == INTEGER_TYPE
7543 && TYPE_NAME (domain) == NULL_TREE
7544 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7545 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7548 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7552 /* ??? If upper is NULL, the array has unspecified length,
7553 but it does have a lower bound. This happens with Fortran
7555 Since the debugger is definitely going to need to know N
7556 to produce useful results, go ahead and output the lower
7557 bound solo, and hope the debugger can cope. */
7559 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7561 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7564 /* We have an array type with an unspecified length. The DWARF-2
7565 spec does not say how to handle this; let's just leave out the
7570 #ifndef MIPS_DEBUGGING_INFO
7576 add_byte_size_attribute (die, tree_node)
7578 register tree tree_node;
7580 register unsigned size;
7582 switch (TREE_CODE (tree_node))
7590 case QUAL_UNION_TYPE:
7591 size = int_size_in_bytes (tree_node);
7594 /* For a data member of a struct or union, the DW_AT_byte_size is
7595 generally given as the number of bytes normally allocated for an
7596 object of the *declared* type of the member itself. This is true
7597 even for bit-fields. */
7598 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7604 /* Note that `size' might be -1 when we get to this point. If it is, that
7605 indicates that the byte size of the entity in question is variable. We
7606 have no good way of expressing this fact in Dwarf at the present time,
7607 so just let the -1 pass on through. */
7609 add_AT_unsigned (die, DW_AT_byte_size, size);
7612 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7613 which specifies the distance in bits from the highest order bit of the
7614 "containing object" for the bit-field to the highest order bit of the
7617 For any given bit-field, the "containing object" is a hypothetical
7618 object (of some integral or enum type) within which the given bit-field
7619 lives. The type of this hypothetical "containing object" is always the
7620 same as the declared type of the individual bit-field itself. The
7621 determination of the exact location of the "containing object" for a
7622 bit-field is rather complicated. It's handled by the
7623 `field_byte_offset' function (above).
7625 Note that it is the size (in bytes) of the hypothetical "containing object"
7626 which will be given in the DW_AT_byte_size attribute for this bit-field.
7627 (See `byte_size_attribute' above). */
7630 add_bit_offset_attribute (die, decl)
7631 register dw_die_ref die;
7634 HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl);
7635 tree type = DECL_BIT_FIELD_TYPE (decl);
7636 HOST_WIDE_INT bitpos_int;
7637 HOST_WIDE_INT highest_order_object_bit_offset;
7638 HOST_WIDE_INT highest_order_field_bit_offset;
7639 HOST_WIDE_INT unsigned bit_offset;
7641 /* Must be a field and a bit field. */
7643 || TREE_CODE (decl) != FIELD_DECL)
7646 /* We can't yet handle bit-fields whose offsets are variable, so if we
7647 encounter such things, just return without generating any attribute
7648 whatsoever. Likewise for variable or too large size. */
7649 if (! host_integerp (bit_position (decl), 0)
7650 || ! host_integerp (DECL_SIZE (decl), 1))
7653 bitpos_int = int_bit_position (decl);
7655 /* Note that the bit offset is always the distance (in bits) from the
7656 highest-order bit of the "containing object" to the highest-order bit of
7657 the bit-field itself. Since the "high-order end" of any object or field
7658 is different on big-endian and little-endian machines, the computation
7659 below must take account of these differences. */
7660 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7661 highest_order_field_bit_offset = bitpos_int;
7663 if (! BYTES_BIG_ENDIAN)
7665 highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0);
7666 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7670 = (! BYTES_BIG_ENDIAN
7671 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7672 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7674 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7677 /* For a FIELD_DECL node which represents a bit field, output an attribute
7678 which specifies the length in bits of the given field. */
7681 add_bit_size_attribute (die, decl)
7682 register dw_die_ref die;
7685 /* Must be a field and a bit field. */
7686 if (TREE_CODE (decl) != FIELD_DECL
7687 || ! DECL_BIT_FIELD_TYPE (decl))
7690 if (host_integerp (DECL_SIZE (decl), 1))
7691 add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1));
7694 /* If the compiled language is ANSI C, then add a 'prototyped'
7695 attribute, if arg types are given for the parameters of a function. */
7698 add_prototyped_attribute (die, func_type)
7699 register dw_die_ref die;
7700 register tree func_type;
7702 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7703 && TYPE_ARG_TYPES (func_type) != NULL)
7704 add_AT_flag (die, DW_AT_prototyped, 1);
7708 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7709 by looking in either the type declaration or object declaration
7713 add_abstract_origin_attribute (die, origin)
7714 register dw_die_ref die;
7715 register tree origin;
7717 dw_die_ref origin_die = NULL;
7719 if (TREE_CODE (origin) != FUNCTION_DECL)
7721 /* We may have gotten separated from the block for the inlined
7722 function, if we're in an exception handler or some such; make
7723 sure that the abstract function has been written out.
7725 Doing this for nested functions is wrong, however; functions are
7726 distinct units, and our context might not even be inline. */
7729 fn = TYPE_STUB_DECL (fn);
7730 fn = decl_function_context (fn);
7732 gen_abstract_function (fn);
7735 if (DECL_P (origin))
7736 origin_die = lookup_decl_die (origin);
7737 else if (TYPE_P (origin))
7738 origin_die = lookup_type_die (origin);
7740 if (origin_die == NULL)
7743 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7746 /* We do not currently support the pure_virtual attribute. */
7749 add_pure_or_virtual_attribute (die, func_decl)
7750 register dw_die_ref die;
7751 register tree func_decl;
7753 if (DECL_VINDEX (func_decl))
7755 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7757 if (host_integerp (DECL_VINDEX (func_decl), 0))
7758 add_AT_loc (die, DW_AT_vtable_elem_location,
7759 new_loc_descr (DW_OP_constu,
7760 tree_low_cst (DECL_VINDEX (func_decl), 0),
7763 /* GNU extension: Record what type this method came from originally. */
7764 if (debug_info_level > DINFO_LEVEL_TERSE)
7765 add_AT_die_ref (die, DW_AT_containing_type,
7766 lookup_type_die (DECL_CONTEXT (func_decl)));
7770 /* Add source coordinate attributes for the given decl. */
7773 add_src_coords_attributes (die, decl)
7774 register dw_die_ref die;
7777 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7779 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7780 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7783 /* Add an DW_AT_name attribute and source coordinate attribute for the
7784 given decl, but only if it actually has a name. */
7787 add_name_and_src_coords_attributes (die, decl)
7788 register dw_die_ref die;
7791 register tree decl_name;
7793 decl_name = DECL_NAME (decl);
7794 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7796 add_name_attribute (die, dwarf2_name (decl, 0));
7797 if (! DECL_ARTIFICIAL (decl))
7798 add_src_coords_attributes (die, decl);
7800 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7801 && TREE_PUBLIC (decl)
7802 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7803 add_AT_string (die, DW_AT_MIPS_linkage_name,
7804 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7808 /* Push a new declaration scope. */
7811 push_decl_scope (scope)
7814 /* Make room in the decl_scope_table, if necessary. */
7815 if (decl_scope_table_allocated == decl_scope_depth)
7817 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7819 = (tree *) xrealloc (decl_scope_table,
7820 decl_scope_table_allocated * sizeof (tree));
7823 decl_scope_table[decl_scope_depth] = scope;
7827 /* Pop a declaration scope. */
7831 if (decl_scope_depth <= 0)
7836 /* Return the DIE for the scope that immediately contains this type.
7837 Non-named types get global scope. Named types nested in other
7838 types get their containing scope if it's open, or global scope
7839 otherwise. All other types (i.e. function-local named types) get
7840 the current active scope. */
7843 scope_die_for (t, context_die)
7845 register dw_die_ref context_die;
7847 register dw_die_ref scope_die = NULL;
7848 register tree containing_scope;
7851 /* Non-types always go in the current scope. */
7855 containing_scope = TYPE_CONTEXT (t);
7857 /* Ignore namespaces for the moment. */
7858 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7859 containing_scope = NULL_TREE;
7861 /* Ignore function type "scopes" from the C frontend. They mean that
7862 a tagged type is local to a parmlist of a function declarator, but
7863 that isn't useful to DWARF. */
7864 if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE)
7865 containing_scope = NULL_TREE;
7867 if (containing_scope == NULL_TREE)
7868 scope_die = comp_unit_die;
7869 else if (TYPE_P (containing_scope))
7871 /* For types, we can just look up the appropriate DIE. But
7872 first we check to see if we're in the middle of emitting it
7873 so we know where the new DIE should go. */
7875 for (i = decl_scope_depth - 1; i >= 0; --i)
7876 if (decl_scope_table[i] == containing_scope)
7881 if (debug_info_level > DINFO_LEVEL_TERSE
7882 && !TREE_ASM_WRITTEN (containing_scope))
7885 /* If none of the current dies are suitable, we get file scope. */
7886 scope_die = comp_unit_die;
7889 scope_die = lookup_type_die (containing_scope);
7892 scope_die = context_die;
7897 /* Returns nonzero iff CONTEXT_DIE is internal to a function. */
7899 static inline int local_scope_p PARAMS ((dw_die_ref));
7901 local_scope_p (context_die)
7902 dw_die_ref context_die;
7904 for (; context_die; context_die = context_die->die_parent)
7905 if (context_die->die_tag == DW_TAG_inlined_subroutine
7906 || context_die->die_tag == DW_TAG_subprogram)
7911 /* Returns nonzero iff CONTEXT_DIE is a class. */
7913 static inline int class_scope_p PARAMS ((dw_die_ref));
7915 class_scope_p (context_die)
7916 dw_die_ref context_die;
7919 && (context_die->die_tag == DW_TAG_structure_type
7920 || context_die->die_tag == DW_TAG_union_type));
7923 /* Many forms of DIEs require a "type description" attribute. This
7924 routine locates the proper "type descriptor" die for the type given
7925 by 'type', and adds an DW_AT_type attribute below the given die. */
7928 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7929 register dw_die_ref object_die;
7931 register int decl_const;
7932 register int decl_volatile;
7933 register dw_die_ref context_die;
7935 register enum tree_code code = TREE_CODE (type);
7936 register dw_die_ref type_die = NULL;
7938 /* ??? If this type is an unnamed subrange type of an integral or
7939 floating-point type, use the inner type. This is because we have no
7940 support for unnamed types in base_type_die. This can happen if this is
7941 an Ada subrange type. Correct solution is emit a subrange type die. */
7942 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7943 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7944 type = TREE_TYPE (type), code = TREE_CODE (type);
7946 if (code == ERROR_MARK)
7949 /* Handle a special case. For functions whose return type is void, we
7950 generate *no* type attribute. (Note that no object may have type
7951 `void', so this only applies to function return types). */
7952 if (code == VOID_TYPE)
7955 type_die = modified_type_die (type,
7956 decl_const || TYPE_READONLY (type),
7957 decl_volatile || TYPE_VOLATILE (type),
7959 if (type_die != NULL)
7960 add_AT_die_ref (object_die, DW_AT_type, type_die);
7963 /* Given a tree pointer to a struct, class, union, or enum type node, return
7964 a pointer to the (string) tag name for the given type, or zero if the type
7965 was declared without a tag. */
7971 register const char *name = 0;
7973 if (TYPE_NAME (type) != 0)
7975 register tree t = 0;
7977 /* Find the IDENTIFIER_NODE for the type name. */
7978 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7979 t = TYPE_NAME (type);
7981 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7982 a TYPE_DECL node, regardless of whether or not a `typedef' was
7984 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7985 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7986 t = DECL_NAME (TYPE_NAME (type));
7988 /* Now get the name as a string, or invent one. */
7990 name = IDENTIFIER_POINTER (t);
7993 return (name == 0 || *name == '\0') ? 0 : name;
7996 /* Return the type associated with a data member, make a special check
7997 for bit field types. */
8000 member_declared_type (member)
8001 register tree member;
8003 return (DECL_BIT_FIELD_TYPE (member)
8004 ? DECL_BIT_FIELD_TYPE (member)
8005 : TREE_TYPE (member));
8008 /* Get the decl's label, as described by its RTL. This may be different
8009 from the DECL_NAME name used in the source file. */
8013 decl_start_label (decl)
8018 x = DECL_RTL (decl);
8019 if (GET_CODE (x) != MEM)
8023 if (GET_CODE (x) != SYMBOL_REF)
8026 fnname = XSTR (x, 0);
8031 /* These routines generate the internal representation of the DIE's for
8032 the compilation unit. Debugging information is collected by walking
8033 the declaration trees passed in from dwarf2out_decl(). */
8036 gen_array_type_die (type, context_die)
8038 register dw_die_ref context_die;
8040 register dw_die_ref scope_die = scope_die_for (type, context_die);
8041 register dw_die_ref array_die;
8042 register tree element_type;
8044 /* ??? The SGI dwarf reader fails for array of array of enum types unless
8045 the inner array type comes before the outer array type. Thus we must
8046 call gen_type_die before we call new_die. See below also. */
8047 #ifdef MIPS_DEBUGGING_INFO
8048 gen_type_die (TREE_TYPE (type), context_die);
8051 array_die = new_die (DW_TAG_array_type, scope_die);
8054 /* We default the array ordering. SDB will probably do
8055 the right things even if DW_AT_ordering is not present. It's not even
8056 an issue until we start to get into multidimensional arrays anyway. If
8057 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
8058 then we'll have to put the DW_AT_ordering attribute back in. (But if
8059 and when we find out that we need to put these in, we will only do so
8060 for multidimensional arrays. */
8061 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
8064 #ifdef MIPS_DEBUGGING_INFO
8065 /* The SGI compilers handle arrays of unknown bound by setting
8066 AT_declaration and not emitting any subrange DIEs. */
8067 if (! TYPE_DOMAIN (type))
8068 add_AT_unsigned (array_die, DW_AT_declaration, 1);
8071 add_subscript_info (array_die, type);
8073 add_name_attribute (array_die, type_tag (type));
8074 equate_type_number_to_die (type, array_die);
8076 /* Add representation of the type of the elements of this array type. */
8077 element_type = TREE_TYPE (type);
8079 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
8080 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
8081 We work around this by disabling this feature. See also
8082 add_subscript_info. */
8083 #ifndef MIPS_DEBUGGING_INFO
8084 while (TREE_CODE (element_type) == ARRAY_TYPE)
8085 element_type = TREE_TYPE (element_type);
8087 gen_type_die (element_type, context_die);
8090 add_type_attribute (array_die, element_type, 0, 0, context_die);
8094 gen_set_type_die (type, context_die)
8096 register dw_die_ref context_die;
8098 register dw_die_ref type_die
8099 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
8101 equate_type_number_to_die (type, type_die);
8102 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
8107 gen_entry_point_die (decl, context_die)
8109 register dw_die_ref context_die;
8111 register tree origin = decl_ultimate_origin (decl);
8112 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
8114 add_abstract_origin_attribute (decl_die, origin);
8117 add_name_and_src_coords_attributes (decl_die, decl);
8118 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
8122 if (DECL_ABSTRACT (decl))
8123 equate_decl_number_to_die (decl, decl_die);
8125 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
8129 /* Remember a type in the incomplete_types_list. */
8132 add_incomplete_type (type)
8135 if (incomplete_types == incomplete_types_allocated)
8137 incomplete_types_allocated += INCOMPLETE_TYPES_INCREMENT;
8138 incomplete_types_list
8139 = (tree *) xrealloc (incomplete_types_list,
8140 sizeof (tree) * incomplete_types_allocated);
8143 incomplete_types_list[incomplete_types++] = type;
8146 /* Walk through the list of incomplete types again, trying once more to
8147 emit full debugging info for them. */
8150 retry_incomplete_types ()
8154 while (incomplete_types)
8157 type = incomplete_types_list[incomplete_types];
8158 gen_type_die (type, comp_unit_die);
8162 /* Generate a DIE to represent an inlined instance of an enumeration type. */
8165 gen_inlined_enumeration_type_die (type, context_die)
8167 register dw_die_ref context_die;
8169 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
8171 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8172 be incomplete and such types are not marked. */
8173 add_abstract_origin_attribute (type_die, type);
8176 /* Generate a DIE to represent an inlined instance of a structure type. */
8179 gen_inlined_structure_type_die (type, context_die)
8181 register dw_die_ref context_die;
8183 register dw_die_ref type_die = new_die (DW_TAG_structure_type, context_die);
8185 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8186 be incomplete and such types are not marked. */
8187 add_abstract_origin_attribute (type_die, type);
8190 /* Generate a DIE to represent an inlined instance of a union type. */
8193 gen_inlined_union_type_die (type, context_die)
8195 register dw_die_ref context_die;
8197 register dw_die_ref type_die = new_die (DW_TAG_union_type, context_die);
8199 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8200 be incomplete and such types are not marked. */
8201 add_abstract_origin_attribute (type_die, type);
8204 /* Generate a DIE to represent an enumeration type. Note that these DIEs
8205 include all of the information about the enumeration values also. Each
8206 enumerated type name/value is listed as a child of the enumerated type
8210 gen_enumeration_type_die (type, context_die)
8212 register dw_die_ref context_die;
8214 register dw_die_ref type_die = lookup_type_die (type);
8216 if (type_die == NULL)
8218 type_die = new_die (DW_TAG_enumeration_type,
8219 scope_die_for (type, context_die));
8220 equate_type_number_to_die (type, type_die);
8221 add_name_attribute (type_die, type_tag (type));
8223 else if (! TYPE_SIZE (type))
8226 remove_AT (type_die, DW_AT_declaration);
8228 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
8229 given enum type is incomplete, do not generate the DW_AT_byte_size
8230 attribute or the DW_AT_element_list attribute. */
8231 if (TYPE_SIZE (type))
8235 TREE_ASM_WRITTEN (type) = 1;
8236 add_byte_size_attribute (type_die, type);
8237 if (TYPE_STUB_DECL (type) != NULL_TREE)
8238 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8240 /* If the first reference to this type was as the return type of an
8241 inline function, then it may not have a parent. Fix this now. */
8242 if (type_die->die_parent == NULL)
8243 add_child_die (scope_die_for (type, context_die), type_die);
8245 for (link = TYPE_FIELDS (type);
8246 link != NULL; link = TREE_CHAIN (link))
8248 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
8250 add_name_attribute (enum_die,
8251 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
8253 if (host_integerp (TREE_VALUE (link), 0))
8255 if (tree_int_cst_sgn (TREE_VALUE (link)) < 0)
8256 add_AT_int (enum_die, DW_AT_const_value,
8257 tree_low_cst (TREE_VALUE (link), 0));
8259 add_AT_unsigned (enum_die, DW_AT_const_value,
8260 tree_low_cst (TREE_VALUE (link), 0));
8265 add_AT_flag (type_die, DW_AT_declaration, 1);
8269 /* Generate a DIE to represent either a real live formal parameter decl or to
8270 represent just the type of some formal parameter position in some function
8273 Note that this routine is a bit unusual because its argument may be a
8274 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8275 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8276 node. If it's the former then this function is being called to output a
8277 DIE to represent a formal parameter object (or some inlining thereof). If
8278 it's the latter, then this function is only being called to output a
8279 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8280 argument type of some subprogram type. */
8283 gen_formal_parameter_die (node, context_die)
8285 register dw_die_ref context_die;
8287 register dw_die_ref parm_die
8288 = new_die (DW_TAG_formal_parameter, context_die);
8289 register tree origin;
8291 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8294 origin = decl_ultimate_origin (node);
8296 add_abstract_origin_attribute (parm_die, origin);
8299 add_name_and_src_coords_attributes (parm_die, node);
8300 add_type_attribute (parm_die, TREE_TYPE (node),
8301 TREE_READONLY (node),
8302 TREE_THIS_VOLATILE (node),
8304 if (DECL_ARTIFICIAL (node))
8305 add_AT_flag (parm_die, DW_AT_artificial, 1);
8308 equate_decl_number_to_die (node, parm_die);
8309 if (! DECL_ABSTRACT (node))
8310 add_location_or_const_value_attribute (parm_die, node);
8315 /* We were called with some kind of a ..._TYPE node. */
8316 add_type_attribute (parm_die, node, 0, 0, context_die);
8326 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8327 at the end of an (ANSI prototyped) formal parameters list. */
8330 gen_unspecified_parameters_die (decl_or_type, context_die)
8331 register tree decl_or_type ATTRIBUTE_UNUSED;
8332 register dw_die_ref context_die;
8334 new_die (DW_TAG_unspecified_parameters, context_die);
8337 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8338 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8339 parameters as specified in some function type specification (except for
8340 those which appear as part of a function *definition*). */
8343 gen_formal_types_die (function_or_method_type, context_die)
8344 register tree function_or_method_type;
8345 register dw_die_ref context_die;
8348 register tree formal_type = NULL;
8349 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8352 /* In the case where we are generating a formal types list for a C++
8353 non-static member function type, skip over the first thing on the
8354 TYPE_ARG_TYPES list because it only represents the type of the hidden
8355 `this pointer'. The debugger should be able to figure out (without
8356 being explicitly told) that this non-static member function type takes a
8357 `this pointer' and should be able to figure what the type of that hidden
8358 parameter is from the DW_AT_member attribute of the parent
8359 DW_TAG_subroutine_type DIE. */
8360 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8361 first_parm_type = TREE_CHAIN (first_parm_type);
8364 /* Make our first pass over the list of formal parameter types and output a
8365 DW_TAG_formal_parameter DIE for each one. */
8366 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8368 register dw_die_ref parm_die;
8370 formal_type = TREE_VALUE (link);
8371 if (formal_type == void_type_node)
8374 /* Output a (nameless) DIE to represent the formal parameter itself. */
8375 parm_die = gen_formal_parameter_die (formal_type, context_die);
8376 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8377 && link == first_parm_type)
8378 add_AT_flag (parm_die, DW_AT_artificial, 1);
8381 /* If this function type has an ellipsis, add a
8382 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8383 if (formal_type != void_type_node)
8384 gen_unspecified_parameters_die (function_or_method_type, context_die);
8386 /* Make our second (and final) pass over the list of formal parameter types
8387 and output DIEs to represent those types (as necessary). */
8388 for (link = TYPE_ARG_TYPES (function_or_method_type);
8390 link = TREE_CHAIN (link))
8392 formal_type = TREE_VALUE (link);
8393 if (formal_type == void_type_node)
8396 gen_type_die (formal_type, context_die);
8400 /* We want to generate the DIE for TYPE so that we can generate the
8401 die for MEMBER, which has been defined; we will need to refer back
8402 to the member declaration nested within TYPE. If we're trying to
8403 generate minimal debug info for TYPE, processing TYPE won't do the
8404 trick; we need to attach the member declaration by hand. */
8407 gen_type_die_for_member (type, member, context_die)
8409 dw_die_ref context_die;
8411 gen_type_die (type, context_die);
8413 /* If we're trying to avoid duplicate debug info, we may not have
8414 emitted the member decl for this function. Emit it now. */
8415 if (TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))
8416 && ! lookup_decl_die (member))
8418 if (decl_ultimate_origin (member))
8421 push_decl_scope (type);
8422 if (TREE_CODE (member) == FUNCTION_DECL)
8423 gen_subprogram_die (member, lookup_type_die (type));
8425 gen_variable_die (member, lookup_type_die (type));
8430 /* Generate the DWARF2 info for the "abstract" instance
8431 of a function which we may later generate inlined and/or
8432 out-of-line instances of. */
8435 gen_abstract_function (decl)
8438 register dw_die_ref old_die = lookup_decl_die (decl);
8441 if (old_die && get_AT_unsigned (old_die, DW_AT_inline))
8442 /* We've already generated the abstract instance. */
8445 save_fn = current_function_decl;
8446 current_function_decl = decl;
8448 set_decl_abstract_flags (decl, 1);
8449 dwarf2out_decl (decl);
8450 set_decl_abstract_flags (decl, 0);
8452 current_function_decl = save_fn;
8455 /* Generate a DIE to represent a declared function (either file-scope or
8459 gen_subprogram_die (decl, context_die)
8461 register dw_die_ref context_die;
8463 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8464 register tree origin = decl_ultimate_origin (decl);
8465 register dw_die_ref subr_die;
8466 register rtx fp_reg;
8467 register tree fn_arg_types;
8468 register tree outer_scope;
8469 register dw_die_ref old_die = lookup_decl_die (decl);
8470 register int declaration = (current_function_decl != decl
8471 || class_scope_p (context_die));
8473 /* Note that it is possible to have both DECL_ABSTRACT and `declaration'
8474 be true, if we started to generate the abstract instance of an inline,
8475 decided to output its containing class, and proceeded to emit the
8476 declaration of the inline from the member list for the class. In that
8477 case, `declaration' takes priority; we'll get back to the abstract
8478 instance when we're done with the class. */
8480 /* The class-scope declaration DIE must be the primary DIE. */
8481 if (origin && declaration && class_scope_p (context_die))
8490 if (declaration && ! local_scope_p (context_die))
8493 /* Fixup die_parent for the abstract instance of a nested
8495 if (old_die && old_die->die_parent == NULL)
8496 add_child_die (context_die, old_die);
8498 subr_die = new_die (DW_TAG_subprogram, context_die);
8499 add_abstract_origin_attribute (subr_die, origin);
8501 else if (old_die && DECL_ABSTRACT (decl)
8502 && get_AT_unsigned (old_die, DW_AT_inline))
8504 /* This must be a redefinition of an extern inline function.
8505 We can just reuse the old die here. */
8508 /* Clear out the inlined attribute and parm types. */
8509 remove_AT (subr_die, DW_AT_inline);
8510 remove_children (subr_die);
8514 register unsigned file_index
8515 = lookup_filename (DECL_SOURCE_FILE (decl));
8517 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8519 /* ??? This can happen if there is a bug in the program, for
8520 instance, if it has duplicate function definitions. Ideally,
8521 we should detect this case and ignore it. For now, if we have
8522 already reported an error, any error at all, then assume that
8523 we got here because of a input error, not a dwarf2 bug. */
8529 /* If the definition comes from the same place as the declaration,
8530 maybe use the old DIE. We always want the DIE for this function
8531 that has the *_pc attributes to be under comp_unit_die so the
8532 debugger can find it. For inlines, that is the concrete instance,
8533 so we can use the old DIE here. For non-inline methods, we want a
8534 specification DIE at toplevel, so we need a new DIE. For local
8535 class methods, this doesn't apply; we just use the old DIE. */
8536 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8537 || context_die == NULL)
8538 && (DECL_ARTIFICIAL (decl)
8539 || (get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8540 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8541 == (unsigned)DECL_SOURCE_LINE (decl)))))
8545 /* Clear out the declaration attribute and the parm types. */
8546 remove_AT (subr_die, DW_AT_declaration);
8547 remove_children (subr_die);
8551 subr_die = new_die (DW_TAG_subprogram, context_die);
8552 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8553 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8554 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8555 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8556 != (unsigned)DECL_SOURCE_LINE (decl))
8558 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8563 subr_die = new_die (DW_TAG_subprogram, context_die);
8565 if (TREE_PUBLIC (decl))
8566 add_AT_flag (subr_die, DW_AT_external, 1);
8568 add_name_and_src_coords_attributes (subr_die, decl);
8569 if (debug_info_level > DINFO_LEVEL_TERSE)
8571 register tree type = TREE_TYPE (decl);
8573 add_prototyped_attribute (subr_die, type);
8574 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8577 add_pure_or_virtual_attribute (subr_die, decl);
8578 if (DECL_ARTIFICIAL (decl))
8579 add_AT_flag (subr_die, DW_AT_artificial, 1);
8580 if (TREE_PROTECTED (decl))
8581 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8582 else if (TREE_PRIVATE (decl))
8583 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8589 add_AT_flag (subr_die, DW_AT_declaration, 1);
8591 /* The first time we see a member function, it is in the context of
8592 the class to which it belongs. We make sure of this by emitting
8593 the class first. The next time is the definition, which is
8594 handled above. The two may come from the same source text. */
8595 if (DECL_CONTEXT (decl) || DECL_ABSTRACT (decl))
8596 equate_decl_number_to_die (decl, subr_die);
8598 else if (DECL_ABSTRACT (decl))
8600 if (DECL_INLINE (decl) && !flag_no_inline)
8602 /* ??? Checking DECL_DEFER_OUTPUT is correct for static
8603 inline functions, but not for extern inline functions.
8604 We can't get this completely correct because information
8605 about whether the function was declared inline is not
8607 if (DECL_DEFER_OUTPUT (decl))
8608 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8610 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8613 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined);
8615 equate_decl_number_to_die (decl, subr_die);
8617 else if (!DECL_EXTERNAL (decl))
8619 if (origin == NULL_TREE)
8620 equate_decl_number_to_die (decl, subr_die);
8622 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8623 current_funcdef_number);
8624 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8625 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8626 current_funcdef_number);
8627 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8629 add_pubname (decl, subr_die);
8630 add_arange (decl, subr_die);
8632 #ifdef MIPS_DEBUGGING_INFO
8633 /* Add a reference to the FDE for this routine. */
8634 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8637 /* Define the "frame base" location for this routine. We use the
8638 frame pointer or stack pointer registers, since the RTL for local
8639 variables is relative to one of them. */
8641 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8642 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8645 /* ??? This fails for nested inline functions, because context_display
8646 is not part of the state saved/restored for inline functions. */
8647 if (current_function_needs_context)
8648 add_AT_location_description (subr_die, DW_AT_static_link,
8649 lookup_static_chain (decl));
8653 /* Now output descriptions of the arguments for this function. This gets
8654 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8655 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8656 `...' at the end of the formal parameter list. In order to find out if
8657 there was a trailing ellipsis or not, we must instead look at the type
8658 associated with the FUNCTION_DECL. This will be a node of type
8659 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8660 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8661 an ellipsis at the end. */
8663 /* In the case where we are describing a mere function declaration, all we
8664 need to do here (and all we *can* do here) is to describe the *types* of
8665 its formal parameters. */
8666 if (debug_info_level <= DINFO_LEVEL_TERSE)
8668 else if (declaration)
8669 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8672 /* Generate DIEs to represent all known formal parameters */
8673 register tree arg_decls = DECL_ARGUMENTS (decl);
8676 /* When generating DIEs, generate the unspecified_parameters DIE
8677 instead if we come across the arg "__builtin_va_alist" */
8678 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8679 if (TREE_CODE (parm) == PARM_DECL)
8681 if (DECL_NAME (parm)
8682 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8683 "__builtin_va_alist"))
8684 gen_unspecified_parameters_die (parm, subr_die);
8686 gen_decl_die (parm, subr_die);
8689 /* Decide whether we need a unspecified_parameters DIE at the end.
8690 There are 2 more cases to do this for: 1) the ansi ... declaration -
8691 this is detectable when the end of the arg list is not a
8692 void_type_node 2) an unprototyped function declaration (not a
8693 definition). This just means that we have no info about the
8694 parameters at all. */
8695 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8696 if (fn_arg_types != NULL)
8698 /* this is the prototyped case, check for ... */
8699 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8700 gen_unspecified_parameters_die (decl, subr_die);
8702 else if (DECL_INITIAL (decl) == NULL_TREE)
8703 gen_unspecified_parameters_die (decl, subr_die);
8706 /* Output Dwarf info for all of the stuff within the body of the function
8707 (if it has one - it may be just a declaration). */
8708 outer_scope = DECL_INITIAL (decl);
8710 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8711 node created to represent a function. This outermost BLOCK actually
8712 represents the outermost binding contour for the function, i.e. the
8713 contour in which the function's formal parameters and labels get
8714 declared. Curiously, it appears that the front end doesn't actually
8715 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8716 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8717 list for the function instead.) The BLOCK_VARS list for the
8718 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8719 the function however, and we output DWARF info for those in
8720 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8721 node representing the function's outermost pair of curly braces, and
8722 any blocks used for the base and member initializers of a C++
8723 constructor function. */
8724 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8726 current_function_has_inlines = 0;
8727 decls_for_scope (outer_scope, subr_die, 0);
8729 #if 0 && defined (MIPS_DEBUGGING_INFO)
8730 if (current_function_has_inlines)
8732 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8733 if (! comp_unit_has_inlines)
8735 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8736 comp_unit_has_inlines = 1;
8743 /* Generate a DIE to represent a declared data object. */
8746 gen_variable_die (decl, context_die)
8748 register dw_die_ref context_die;
8750 register tree origin = decl_ultimate_origin (decl);
8751 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8753 dw_die_ref old_die = lookup_decl_die (decl);
8754 int declaration = (DECL_EXTERNAL (decl)
8755 || class_scope_p (context_die));
8758 add_abstract_origin_attribute (var_die, origin);
8759 /* Loop unrolling can create multiple blocks that refer to the same
8760 static variable, so we must test for the DW_AT_declaration flag. */
8761 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8762 copy decls and set the DECL_ABSTRACT flag on them instead of
8764 else if (old_die && TREE_STATIC (decl)
8765 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8767 /* This is a definition of a C++ class level static. */
8768 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8769 if (DECL_NAME (decl))
8771 register unsigned file_index
8772 = lookup_filename (DECL_SOURCE_FILE (decl));
8774 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8775 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8777 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8778 != (unsigned)DECL_SOURCE_LINE (decl))
8780 add_AT_unsigned (var_die, DW_AT_decl_line,
8781 DECL_SOURCE_LINE (decl));
8786 add_name_and_src_coords_attributes (var_die, decl);
8787 add_type_attribute (var_die, TREE_TYPE (decl),
8788 TREE_READONLY (decl),
8789 TREE_THIS_VOLATILE (decl), context_die);
8791 if (TREE_PUBLIC (decl))
8792 add_AT_flag (var_die, DW_AT_external, 1);
8794 if (DECL_ARTIFICIAL (decl))
8795 add_AT_flag (var_die, DW_AT_artificial, 1);
8797 if (TREE_PROTECTED (decl))
8798 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8800 else if (TREE_PRIVATE (decl))
8801 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8805 add_AT_flag (var_die, DW_AT_declaration, 1);
8807 if (class_scope_p (context_die) || DECL_ABSTRACT (decl))
8808 equate_decl_number_to_die (decl, var_die);
8810 if (! declaration && ! DECL_ABSTRACT (decl))
8812 add_location_or_const_value_attribute (var_die, decl);
8813 add_pubname (decl, var_die);
8817 /* Generate a DIE to represent a label identifier. */
8820 gen_label_die (decl, context_die)
8822 register dw_die_ref context_die;
8824 register tree origin = decl_ultimate_origin (decl);
8825 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8827 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8828 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8831 add_abstract_origin_attribute (lbl_die, origin);
8833 add_name_and_src_coords_attributes (lbl_die, decl);
8835 if (DECL_ABSTRACT (decl))
8836 equate_decl_number_to_die (decl, lbl_die);
8839 insn = DECL_RTL (decl);
8841 /* Deleted labels are programmer specified labels which have been
8842 eliminated because of various optimisations. We still emit them
8843 here so that it is possible to put breakpoints on them. */
8844 if (GET_CODE (insn) == CODE_LABEL
8845 || ((GET_CODE (insn) == NOTE
8846 && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)))
8848 /* When optimization is enabled (via -O) some parts of the compiler
8849 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8850 represent source-level labels which were explicitly declared by
8851 the user. This really shouldn't be happening though, so catch
8852 it if it ever does happen. */
8853 if (INSN_DELETED_P (insn))
8856 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8857 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8858 (unsigned) INSN_UID (insn));
8859 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8864 /* Generate a DIE for a lexical block. */
8867 gen_lexical_block_die (stmt, context_die, depth)
8869 register dw_die_ref context_die;
8872 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8873 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8875 if (! BLOCK_ABSTRACT (stmt))
8877 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8878 BLOCK_NUMBER (stmt));
8879 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8880 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
8881 BLOCK_NUMBER (stmt));
8882 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8885 decls_for_scope (stmt, stmt_die, depth);
8888 /* Generate a DIE for an inlined subprogram. */
8891 gen_inlined_subroutine_die (stmt, context_die, depth)
8893 register dw_die_ref context_die;
8896 if (! BLOCK_ABSTRACT (stmt))
8898 register dw_die_ref subr_die
8899 = new_die (DW_TAG_inlined_subroutine, context_die);
8900 register tree decl = block_ultimate_origin (stmt);
8901 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8903 /* Emit info for the abstract instance first, if we haven't yet. */
8904 gen_abstract_function (decl);
8906 add_abstract_origin_attribute (subr_die, decl);
8907 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8908 BLOCK_NUMBER (stmt));
8909 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8910 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
8911 BLOCK_NUMBER (stmt));
8912 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8913 decls_for_scope (stmt, subr_die, depth);
8914 current_function_has_inlines = 1;
8918 /* Generate a DIE for a field in a record, or structure. */
8921 gen_field_die (decl, context_die)
8923 register dw_die_ref context_die;
8925 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8927 add_name_and_src_coords_attributes (decl_die, decl);
8928 add_type_attribute (decl_die, member_declared_type (decl),
8929 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8932 /* If this is a bit field... */
8933 if (DECL_BIT_FIELD_TYPE (decl))
8935 add_byte_size_attribute (decl_die, decl);
8936 add_bit_size_attribute (decl_die, decl);
8937 add_bit_offset_attribute (decl_die, decl);
8940 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8941 add_data_member_location_attribute (decl_die, decl);
8943 if (DECL_ARTIFICIAL (decl))
8944 add_AT_flag (decl_die, DW_AT_artificial, 1);
8946 if (TREE_PROTECTED (decl))
8947 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8949 else if (TREE_PRIVATE (decl))
8950 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8954 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8955 Use modified_type_die instead.
8956 We keep this code here just in case these types of DIEs may be needed to
8957 represent certain things in other languages (e.g. Pascal) someday. */
8959 gen_pointer_type_die (type, context_die)
8961 register dw_die_ref context_die;
8963 register dw_die_ref ptr_die
8964 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8966 equate_type_number_to_die (type, ptr_die);
8967 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8968 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8971 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8972 Use modified_type_die instead.
8973 We keep this code here just in case these types of DIEs may be needed to
8974 represent certain things in other languages (e.g. Pascal) someday. */
8976 gen_reference_type_die (type, context_die)
8978 register dw_die_ref context_die;
8980 register dw_die_ref ref_die
8981 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8983 equate_type_number_to_die (type, ref_die);
8984 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8985 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8989 /* Generate a DIE for a pointer to a member type. */
8991 gen_ptr_to_mbr_type_die (type, context_die)
8993 register dw_die_ref context_die;
8995 register dw_die_ref ptr_die
8996 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8998 equate_type_number_to_die (type, ptr_die);
8999 add_AT_die_ref (ptr_die, DW_AT_containing_type,
9000 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
9001 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
9004 /* Generate the DIE for the compilation unit. */
9007 gen_compile_unit_die (filename)
9008 register const char *filename;
9010 register dw_die_ref die;
9012 const char *wd = getpwd ();
9015 die = new_die (DW_TAG_compile_unit, NULL);
9016 add_name_attribute (die, filename);
9018 if (wd != NULL && filename[0] != DIR_SEPARATOR)
9019 add_AT_string (die, DW_AT_comp_dir, wd);
9021 sprintf (producer, "%s %s", language_string, version_string);
9023 #ifdef MIPS_DEBUGGING_INFO
9024 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
9025 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
9026 not appear in the producer string, the debugger reaches the conclusion
9027 that the object file is stripped and has no debugging information.
9028 To get the MIPS/SGI debugger to believe that there is debugging
9029 information in the object file, we add a -g to the producer string. */
9030 if (debug_info_level > DINFO_LEVEL_TERSE)
9031 strcat (producer, " -g");
9034 add_AT_string (die, DW_AT_producer, producer);
9036 if (strcmp (language_string, "GNU C++") == 0)
9037 language = DW_LANG_C_plus_plus;
9038 else if (strcmp (language_string, "GNU Ada") == 0)
9039 language = DW_LANG_Ada83;
9040 else if (strcmp (language_string, "GNU F77") == 0)
9041 language = DW_LANG_Fortran77;
9042 else if (strcmp (language_string, "GNU Pascal") == 0)
9043 language = DW_LANG_Pascal83;
9044 else if (flag_traditional)
9045 language = DW_LANG_C;
9047 language = DW_LANG_C89;
9049 add_AT_unsigned (die, DW_AT_language, language);
9054 /* Generate a DIE for a string type. */
9057 gen_string_type_die (type, context_die)
9059 register dw_die_ref context_die;
9061 register dw_die_ref type_die
9062 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
9064 equate_type_number_to_die (type, type_die);
9066 /* Fudge the string length attribute for now. */
9068 /* TODO: add string length info.
9069 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
9070 bound_representation (upper_bound, 0, 'u'); */
9073 /* Generate the DIE for a base class. */
9076 gen_inheritance_die (binfo, context_die)
9077 register tree binfo;
9078 register dw_die_ref context_die;
9080 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
9082 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
9083 add_data_member_location_attribute (die, binfo);
9085 if (TREE_VIA_VIRTUAL (binfo))
9086 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
9087 if (TREE_VIA_PUBLIC (binfo))
9088 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
9089 else if (TREE_VIA_PROTECTED (binfo))
9090 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
9093 /* Generate a DIE for a class member. */
9096 gen_member_die (type, context_die)
9098 register dw_die_ref context_die;
9100 register tree member;
9103 /* If this is not an incomplete type, output descriptions of each of its
9104 members. Note that as we output the DIEs necessary to represent the
9105 members of this record or union type, we will also be trying to output
9106 DIEs to represent the *types* of those members. However the `type'
9107 function (above) will specifically avoid generating type DIEs for member
9108 types *within* the list of member DIEs for this (containing) type execpt
9109 for those types (of members) which are explicitly marked as also being
9110 members of this (containing) type themselves. The g++ front- end can
9111 force any given type to be treated as a member of some other
9112 (containing) type by setting the TYPE_CONTEXT of the given (member) type
9113 to point to the TREE node representing the appropriate (containing)
9116 /* First output info about the base classes. */
9117 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
9119 register tree bases = TYPE_BINFO_BASETYPES (type);
9120 register int n_bases = TREE_VEC_LENGTH (bases);
9123 for (i = 0; i < n_bases; i++)
9124 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
9127 /* Now output info about the data members and type members. */
9128 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
9130 /* If we thought we were generating minimal debug info for TYPE
9131 and then changed our minds, some of the member declarations
9132 may have already been defined. Don't define them again, but
9133 do put them in the right order. */
9135 child = lookup_decl_die (member);
9137 splice_child_die (context_die, child);
9139 gen_decl_die (member, context_die);
9142 /* Now output info about the function members (if any). */
9143 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
9145 child = lookup_decl_die (member);
9147 splice_child_die (context_die, child);
9149 gen_decl_die (member, context_die);
9153 /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG
9154 is set, we pretend that the type was never defined, so we only get the
9155 member DIEs needed by later specification DIEs. */
9158 gen_struct_or_union_type_die (type, context_die)
9160 register dw_die_ref context_die;
9162 register dw_die_ref type_die = lookup_type_die (type);
9163 register dw_die_ref scope_die = 0;
9164 register int nested = 0;
9165 int complete = (TYPE_SIZE (type)
9166 && (! TYPE_STUB_DECL (type)
9167 || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))));
9169 if (type_die && ! complete)
9172 if (TYPE_CONTEXT (type) != NULL_TREE
9173 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)))
9176 scope_die = scope_die_for (type, context_die);
9178 if (! type_die || (nested && scope_die == comp_unit_die))
9179 /* First occurrence of type or toplevel definition of nested class. */
9181 register dw_die_ref old_die = type_die;
9183 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
9184 ? DW_TAG_structure_type : DW_TAG_union_type,
9186 equate_type_number_to_die (type, type_die);
9187 add_name_attribute (type_die, type_tag (type));
9189 add_AT_die_ref (type_die, DW_AT_specification, old_die);
9192 remove_AT (type_die, DW_AT_declaration);
9194 /* If this type has been completed, then give it a byte_size attribute and
9195 then give a list of members. */
9198 /* Prevent infinite recursion in cases where the type of some member of
9199 this type is expressed in terms of this type itself. */
9200 TREE_ASM_WRITTEN (type) = 1;
9201 add_byte_size_attribute (type_die, type);
9202 if (TYPE_STUB_DECL (type) != NULL_TREE)
9203 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
9205 /* If the first reference to this type was as the return type of an
9206 inline function, then it may not have a parent. Fix this now. */
9207 if (type_die->die_parent == NULL)
9208 add_child_die (scope_die, type_die);
9210 push_decl_scope (type);
9211 gen_member_die (type, type_die);
9214 /* GNU extension: Record what type our vtable lives in. */
9215 if (TYPE_VFIELD (type))
9217 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
9219 gen_type_die (vtype, context_die);
9220 add_AT_die_ref (type_die, DW_AT_containing_type,
9221 lookup_type_die (vtype));
9226 add_AT_flag (type_die, DW_AT_declaration, 1);
9228 /* We don't need to do this for function-local types. */
9229 if (! decl_function_context (TYPE_STUB_DECL (type)))
9230 add_incomplete_type (type);
9234 /* Generate a DIE for a subroutine _type_. */
9237 gen_subroutine_type_die (type, context_die)
9239 register dw_die_ref context_die;
9241 register tree return_type = TREE_TYPE (type);
9242 register dw_die_ref subr_die
9243 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
9245 equate_type_number_to_die (type, subr_die);
9246 add_prototyped_attribute (subr_die, type);
9247 add_type_attribute (subr_die, return_type, 0, 0, context_die);
9248 gen_formal_types_die (type, subr_die);
9251 /* Generate a DIE for a type definition */
9254 gen_typedef_die (decl, context_die)
9256 register dw_die_ref context_die;
9258 register dw_die_ref type_die;
9259 register tree origin;
9261 if (TREE_ASM_WRITTEN (decl))
9263 TREE_ASM_WRITTEN (decl) = 1;
9265 type_die = new_die (DW_TAG_typedef, context_die);
9266 origin = decl_ultimate_origin (decl);
9268 add_abstract_origin_attribute (type_die, origin);
9272 add_name_and_src_coords_attributes (type_die, decl);
9273 if (DECL_ORIGINAL_TYPE (decl))
9275 type = DECL_ORIGINAL_TYPE (decl);
9276 equate_type_number_to_die (TREE_TYPE (decl), type_die);
9279 type = TREE_TYPE (decl);
9280 add_type_attribute (type_die, type, TREE_READONLY (decl),
9281 TREE_THIS_VOLATILE (decl), context_die);
9284 if (DECL_ABSTRACT (decl))
9285 equate_decl_number_to_die (decl, type_die);
9288 /* Generate a type description DIE. */
9291 gen_type_die (type, context_die)
9293 register dw_die_ref context_die;
9297 if (type == NULL_TREE || type == error_mark_node)
9300 /* We are going to output a DIE to represent the unqualified version of
9301 this type (i.e. without any const or volatile qualifiers) so get the
9302 main variant (i.e. the unqualified version) of this type now. */
9303 type = type_main_variant (type);
9305 if (TREE_ASM_WRITTEN (type))
9308 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9309 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
9311 TREE_ASM_WRITTEN (type) = 1;
9312 gen_decl_die (TYPE_NAME (type), context_die);
9316 switch (TREE_CODE (type))
9322 case REFERENCE_TYPE:
9323 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
9324 ensures that the gen_type_die recursion will terminate even if the
9325 type is recursive. Recursive types are possible in Ada. */
9326 /* ??? We could perhaps do this for all types before the switch
9328 TREE_ASM_WRITTEN (type) = 1;
9330 /* For these types, all that is required is that we output a DIE (or a
9331 set of DIEs) to represent the "basis" type. */
9332 gen_type_die (TREE_TYPE (type), context_die);
9336 /* This code is used for C++ pointer-to-data-member types.
9337 Output a description of the relevant class type. */
9338 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
9340 /* Output a description of the type of the object pointed to. */
9341 gen_type_die (TREE_TYPE (type), context_die);
9343 /* Now output a DIE to represent this pointer-to-data-member type
9345 gen_ptr_to_mbr_type_die (type, context_die);
9349 gen_type_die (TYPE_DOMAIN (type), context_die);
9350 gen_set_type_die (type, context_die);
9354 gen_type_die (TREE_TYPE (type), context_die);
9355 abort (); /* No way to represent these in Dwarf yet! */
9359 /* Force out return type (in case it wasn't forced out already). */
9360 gen_type_die (TREE_TYPE (type), context_die);
9361 gen_subroutine_type_die (type, context_die);
9365 /* Force out return type (in case it wasn't forced out already). */
9366 gen_type_die (TREE_TYPE (type), context_die);
9367 gen_subroutine_type_die (type, context_die);
9371 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9373 gen_type_die (TREE_TYPE (type), context_die);
9374 gen_string_type_die (type, context_die);
9377 gen_array_type_die (type, context_die);
9381 gen_type_die (TYPE_DEBUG_REPRESENTATION_TYPE (type), context_die);
9387 case QUAL_UNION_TYPE:
9388 /* If this is a nested type whose containing class hasn't been
9389 written out yet, writing it out will cover this one, too.
9390 This does not apply to instantiations of member class templates;
9391 they need to be added to the containing class as they are
9392 generated. FIXME: This hurts the idea of combining type decls
9393 from multiple TUs, since we can't predict what set of template
9394 instantiations we'll get. */
9395 if (TYPE_CONTEXT (type)
9396 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9397 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9399 gen_type_die (TYPE_CONTEXT (type), context_die);
9401 if (TREE_ASM_WRITTEN (type))
9404 /* If that failed, attach ourselves to the stub. */
9405 push_decl_scope (TYPE_CONTEXT (type));
9406 context_die = lookup_type_die (TYPE_CONTEXT (type));
9412 if (TREE_CODE (type) == ENUMERAL_TYPE)
9413 gen_enumeration_type_die (type, context_die);
9415 gen_struct_or_union_type_die (type, context_die);
9420 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9421 it up if it is ever completed. gen_*_type_die will set it for us
9422 when appropriate. */
9431 /* No DIEs needed for fundamental types. */
9435 /* No Dwarf representation currently defined. */
9442 TREE_ASM_WRITTEN (type) = 1;
9445 /* Generate a DIE for a tagged type instantiation. */
9448 gen_tagged_type_instantiation_die (type, context_die)
9450 register dw_die_ref context_die;
9452 if (type == NULL_TREE || type == error_mark_node)
9455 /* We are going to output a DIE to represent the unqualified version of
9456 this type (i.e. without any const or volatile qualifiers) so make sure
9457 that we have the main variant (i.e. the unqualified version) of this
9459 if (type != type_main_variant (type))
9462 /* Do not check TREE_ASM_WRITTEN (type) as it may not be set if this is
9463 an instance of an unresolved type. */
9465 switch (TREE_CODE (type))
9471 gen_inlined_enumeration_type_die (type, context_die);
9475 gen_inlined_structure_type_die (type, context_die);
9479 case QUAL_UNION_TYPE:
9480 gen_inlined_union_type_die (type, context_die);
9488 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9489 things which are local to the given block. */
9492 gen_block_die (stmt, context_die, depth)
9494 register dw_die_ref context_die;
9497 register int must_output_die = 0;
9498 register tree origin;
9500 register enum tree_code origin_code;
9502 /* Ignore blocks never really used to make RTL. */
9504 if (stmt == NULL_TREE || !TREE_USED (stmt)
9505 || (!TREE_ASM_WRITTEN (stmt) && !BLOCK_ABSTRACT (stmt)))
9508 /* Determine the "ultimate origin" of this block. This block may be an
9509 inlined instance of an inlined instance of inline function, so we have
9510 to trace all of the way back through the origin chain to find out what
9511 sort of node actually served as the original seed for the creation of
9512 the current block. */
9513 origin = block_ultimate_origin (stmt);
9514 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9516 /* Determine if we need to output any Dwarf DIEs at all to represent this
9518 if (origin_code == FUNCTION_DECL)
9519 /* The outer scopes for inlinings *must* always be represented. We
9520 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9521 must_output_die = 1;
9524 /* In the case where the current block represents an inlining of the
9525 "body block" of an inline function, we must *NOT* output any DIE for
9526 this block because we have already output a DIE to represent the
9527 whole inlined function scope and the "body block" of any function
9528 doesn't really represent a different scope according to ANSI C
9529 rules. So we check here to make sure that this block does not
9530 represent a "body block inlining" before trying to set the
9531 `must_output_die' flag. */
9532 if (! is_body_block (origin ? origin : stmt))
9534 /* Determine if this block directly contains any "significant"
9535 local declarations which we will need to output DIEs for. */
9536 if (debug_info_level > DINFO_LEVEL_TERSE)
9537 /* We are not in terse mode so *any* local declaration counts
9538 as being a "significant" one. */
9539 must_output_die = (BLOCK_VARS (stmt) != NULL);
9541 /* We are in terse mode, so only local (nested) function
9542 definitions count as "significant" local declarations. */
9543 for (decl = BLOCK_VARS (stmt);
9544 decl != NULL; decl = TREE_CHAIN (decl))
9545 if (TREE_CODE (decl) == FUNCTION_DECL
9546 && DECL_INITIAL (decl))
9548 must_output_die = 1;
9554 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9555 DIE for any block which contains no significant local declarations at
9556 all. Rather, in such cases we just call `decls_for_scope' so that any
9557 needed Dwarf info for any sub-blocks will get properly generated. Note
9558 that in terse mode, our definition of what constitutes a "significant"
9559 local declaration gets restricted to include only inlined function
9560 instances and local (nested) function definitions. */
9561 if (must_output_die)
9563 if (origin_code == FUNCTION_DECL)
9564 gen_inlined_subroutine_die (stmt, context_die, depth);
9566 gen_lexical_block_die (stmt, context_die, depth);
9569 decls_for_scope (stmt, context_die, depth);
9572 /* Generate all of the decls declared within a given scope and (recursively)
9573 all of its sub-blocks. */
9576 decls_for_scope (stmt, context_die, depth)
9578 register dw_die_ref context_die;
9582 register tree subblocks;
9584 /* Ignore blocks never really used to make RTL. */
9585 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9588 /* Output the DIEs to represent all of the data objects and typedefs
9589 declared directly within this block but not within any nested
9590 sub-blocks. Also, nested function and tag DIEs have been
9591 generated with a parent of NULL; fix that up now. */
9592 for (decl = BLOCK_VARS (stmt);
9593 decl != NULL; decl = TREE_CHAIN (decl))
9595 register dw_die_ref die;
9597 if (TREE_CODE (decl) == FUNCTION_DECL)
9598 die = lookup_decl_die (decl);
9599 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9600 die = lookup_type_die (TREE_TYPE (decl));
9604 if (die != NULL && die->die_parent == NULL)
9605 add_child_die (context_die, die);
9607 gen_decl_die (decl, context_die);
9610 /* Output the DIEs to represent all sub-blocks (and the items declared
9611 therein) of this block. */
9612 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9614 subblocks = BLOCK_CHAIN (subblocks))
9615 gen_block_die (subblocks, context_die, depth + 1);
9618 /* Is this a typedef we can avoid emitting? */
9621 is_redundant_typedef (decl)
9624 if (TYPE_DECL_IS_STUB (decl))
9627 if (DECL_ARTIFICIAL (decl)
9628 && DECL_CONTEXT (decl)
9629 && is_tagged_type (DECL_CONTEXT (decl))
9630 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9631 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9632 /* Also ignore the artificial member typedef for the class name. */
9638 /* Generate Dwarf debug information for a decl described by DECL. */
9641 gen_decl_die (decl, context_die)
9643 register dw_die_ref context_die;
9645 register tree origin;
9647 if (TREE_CODE (decl) == ERROR_MARK)
9650 /* If this ..._DECL node is marked to be ignored, then ignore it. */
9651 if (DECL_IGNORED_P (decl))
9654 switch (TREE_CODE (decl))
9657 /* The individual enumerators of an enum type get output when we output
9658 the Dwarf representation of the relevant enum type itself. */
9662 /* Don't output any DIEs to represent mere function declarations,
9663 unless they are class members or explicit block externs. */
9664 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9665 && (current_function_decl == NULL_TREE || DECL_ARTIFICIAL (decl)))
9668 /* If we're emitting an out-of-line copy of an inline function,
9669 emit info for the abstract instance and set up to refer to it. */
9670 if (DECL_INLINE (decl) && ! DECL_ABSTRACT (decl)
9671 && ! class_scope_p (context_die))
9673 gen_abstract_function (decl);
9674 set_decl_origin_self (decl);
9677 if (debug_info_level > DINFO_LEVEL_TERSE)
9679 /* Before we describe the FUNCTION_DECL itself, make sure that we
9680 have described its return type. */
9681 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9683 /* And its virtual context. */
9684 if (DECL_VINDEX (decl) != NULL_TREE)
9685 gen_type_die (DECL_CONTEXT (decl), context_die);
9687 /* And its containing type. */
9688 origin = decl_class_context (decl);
9689 if (origin != NULL_TREE)
9690 gen_type_die_for_member (origin, decl, context_die);
9693 /* Now output a DIE to represent the function itself. */
9694 gen_subprogram_die (decl, context_die);
9698 /* If we are in terse mode, don't generate any DIEs to represent any
9700 if (debug_info_level <= DINFO_LEVEL_TERSE)
9703 /* In the special case of a TYPE_DECL node representing the
9704 declaration of some type tag, if the given TYPE_DECL is marked as
9705 having been instantiated from some other (original) TYPE_DECL node
9706 (e.g. one which was generated within the original definition of an
9707 inline function) we have to generate a special (abbreviated)
9708 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9710 if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE)
9712 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9716 if (is_redundant_typedef (decl))
9717 gen_type_die (TREE_TYPE (decl), context_die);
9719 /* Output a DIE to represent the typedef itself. */
9720 gen_typedef_die (decl, context_die);
9724 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9725 gen_label_die (decl, context_die);
9729 /* If we are in terse mode, don't generate any DIEs to represent any
9730 variable declarations or definitions. */
9731 if (debug_info_level <= DINFO_LEVEL_TERSE)
9734 /* Output any DIEs that are needed to specify the type of this data
9736 gen_type_die (TREE_TYPE (decl), context_die);
9738 /* And its containing type. */
9739 origin = decl_class_context (decl);
9740 if (origin != NULL_TREE)
9741 gen_type_die_for_member (origin, decl, context_die);
9743 /* Now output the DIE to represent the data object itself. This gets
9744 complicated because of the possibility that the VAR_DECL really
9745 represents an inlined instance of a formal parameter for an inline
9747 origin = decl_ultimate_origin (decl);
9748 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9749 gen_formal_parameter_die (decl, context_die);
9751 gen_variable_die (decl, context_die);
9755 /* Ignore the nameless fields that are used to skip bits, but
9756 handle C++ anonymous unions. */
9757 if (DECL_NAME (decl) != NULL_TREE
9758 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9760 gen_type_die (member_declared_type (decl), context_die);
9761 gen_field_die (decl, context_die);
9766 gen_type_die (TREE_TYPE (decl), context_die);
9767 gen_formal_parameter_die (decl, context_die);
9770 case NAMESPACE_DECL:
9771 /* Ignore for now. */
9779 /* Add Ada "use" clause information for SGI Workshop debugger. */
9782 dwarf2out_add_library_unit_info (filename, context_list)
9783 const char *filename;
9784 const char *context_list;
9786 unsigned int file_index;
9788 if (filename != NULL)
9790 dw_die_ref unit_die = new_die (DW_TAG_module, comp_unit_die);
9791 tree context_list_decl
9792 = build_decl (LABEL_DECL, get_identifier (context_list),
9795 TREE_PUBLIC (context_list_decl) = TRUE;
9796 add_name_attribute (unit_die, context_list);
9797 file_index = lookup_filename (filename);
9798 add_AT_unsigned (unit_die, DW_AT_decl_file, file_index);
9799 add_pubname (context_list_decl, unit_die);
9803 /* Write the debugging output for DECL. */
9806 dwarf2out_decl (decl)
9809 register dw_die_ref context_die = comp_unit_die;
9811 if (TREE_CODE (decl) == ERROR_MARK)
9814 /* If this ..._DECL node is marked to be ignored, then ignore it. */
9815 if (DECL_IGNORED_P (decl))
9818 switch (TREE_CODE (decl))
9821 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9822 builtin function. Explicit programmer-supplied declarations of
9823 these same functions should NOT be ignored however. */
9824 if (DECL_EXTERNAL (decl) && DECL_BUILT_IN (decl))
9827 /* What we would really like to do here is to filter out all mere
9828 file-scope declarations of file-scope functions which are never
9829 referenced later within this translation unit (and keep all of ones
9830 that *are* referenced later on) but we aren't clairvoyant, so we have
9831 no idea which functions will be referenced in the future (i.e. later
9832 on within the current translation unit). So here we just ignore all
9833 file-scope function declarations which are not also definitions. If
9834 and when the debugger needs to know something about these functions,
9835 it will have to hunt around and find the DWARF information associated
9836 with the definition of the function. Note that we can't just check
9837 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9838 definitions and which ones represent mere declarations. We have to
9839 check `DECL_INITIAL' instead. That's because the C front-end
9840 supports some weird semantics for "extern inline" function
9841 definitions. These can get inlined within the current translation
9842 unit (an thus, we need to generate DWARF info for their abstract
9843 instances so that the DWARF info for the concrete inlined instances
9844 can have something to refer to) but the compiler never generates any
9845 out-of-lines instances of such things (despite the fact that they
9846 *are* definitions). The important point is that the C front-end
9847 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9848 to generate DWARF for them anyway. Note that the C++ front-end also
9849 plays some similar games for inline function definitions appearing
9850 within include files which also contain
9851 `#pragma interface' pragmas. */
9852 if (DECL_INITIAL (decl) == NULL_TREE)
9855 /* If we're a nested function, initially use a parent of NULL; if we're
9856 a plain function, this will be fixed up in decls_for_scope. If
9857 we're a method, it will be ignored, since we already have a DIE. */
9858 if (decl_function_context (decl))
9864 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9865 declaration and if the declaration was never even referenced from
9866 within this entire compilation unit. We suppress these DIEs in
9867 order to save space in the .debug section (by eliminating entries
9868 which are probably useless). Note that we must not suppress
9869 block-local extern declarations (whether used or not) because that
9870 would screw-up the debugger's name lookup mechanism and cause it to
9871 miss things which really ought to be in scope at a given point. */
9872 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9875 /* If we are in terse mode, don't generate any DIEs to represent any
9876 variable declarations or definitions. */
9877 if (debug_info_level <= DINFO_LEVEL_TERSE)
9882 /* Don't emit stubs for types unless they are needed by other DIEs. */
9883 if (TYPE_DECL_SUPPRESS_DEBUG (decl))
9886 /* Don't bother trying to generate any DIEs to represent any of the
9887 normal built-in types for the language we are compiling. */
9888 if (DECL_SOURCE_LINE (decl) == 0)
9890 /* OK, we need to generate one for `bool' so GDB knows what type
9891 comparisons have. */
9892 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9893 == DW_LANG_C_plus_plus)
9894 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9895 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9900 /* If we are in terse mode, don't generate any DIEs for types. */
9901 if (debug_info_level <= DINFO_LEVEL_TERSE)
9904 /* If we're a function-scope tag, initially use a parent of NULL;
9905 this will be fixed up in decls_for_scope. */
9906 if (decl_function_context (decl))
9915 gen_decl_die (decl, context_die);
9918 /* Output a marker (i.e. a label) for the beginning of the generated code for
9922 dwarf2out_begin_block (blocknum)
9923 register unsigned blocknum;
9925 function_section (current_function_decl);
9926 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9929 /* Output a marker (i.e. a label) for the end of the generated code for a
9933 dwarf2out_end_block (blocknum)
9934 register unsigned blocknum;
9936 function_section (current_function_decl);
9937 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9940 /* Returns nonzero if it is appropriate not to emit any debugging
9941 information for BLOCK, because it doesn't contain any instructions.
9943 Don't allow this for blocks with nested functions or local classes
9944 as we would end up with orphans, and in the presence of scheduling
9945 we may end up calling them anyway. */
9948 dwarf2out_ignore_block (block)
9952 for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl))
9953 if (TREE_CODE (decl) == FUNCTION_DECL
9954 || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)))
9959 /* Output a marker (i.e. a label) at a point in the assembly code which
9960 corresponds to a given source level label. */
9963 dwarf2out_label (insn)
9966 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9968 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9970 function_section (current_function_decl);
9971 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9972 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9973 (unsigned) INSN_UID (insn));
9977 /* Lookup a filename (in the list of filenames that we know about here in
9978 dwarf2out.c) and return its "index". The index of each (known) filename is
9979 just a unique number which is associated with only that one filename.
9980 We need such numbers for the sake of generating labels
9981 (in the .debug_sfnames section) and references to those
9982 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9983 If the filename given as an argument is not found in our current list,
9984 add it to the list and assign it the next available unique index number.
9985 In order to speed up searches, we remember the index of the filename
9986 was looked up last. This handles the majority of all searches. */
9989 lookup_filename (file_name)
9990 const char *file_name;
9992 static unsigned last_file_lookup_index = 0;
9993 register unsigned i;
9995 /* Check to see if the file name that was searched on the previous call
9996 matches this file name. If so, return the index. */
9997 if (last_file_lookup_index != 0)
9998 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9999 return last_file_lookup_index;
10001 /* Didn't match the previous lookup, search the table */
10002 for (i = 1; i < file_table_in_use; ++i)
10003 if (strcmp (file_name, file_table[i]) == 0)
10005 last_file_lookup_index = i;
10009 /* Prepare to add a new table entry by making sure there is enough space in
10010 the table to do so. If not, expand the current table. */
10011 if (file_table_in_use == file_table_allocated)
10013 file_table_allocated += FILE_TABLE_INCREMENT;
10015 = (char **) xrealloc (file_table,
10016 file_table_allocated * sizeof (char *));
10019 /* Add the new entry to the end of the filename table. */
10020 file_table[file_table_in_use] = xstrdup (file_name);
10021 last_file_lookup_index = file_table_in_use++;
10023 return last_file_lookup_index;
10026 /* Output a label to mark the beginning of a source code line entry
10027 and record information relating to this source line, in
10028 'line_info_table' for later output of the .debug_line section. */
10031 dwarf2out_line (filename, line)
10032 register const char *filename;
10033 register unsigned line;
10035 if (debug_info_level >= DINFO_LEVEL_NORMAL)
10037 function_section (current_function_decl);
10039 if (DWARF2_ASM_LINE_DEBUG_INFO)
10041 static const char *lastfile;
10043 /* Emit the .file and .loc directives understood by GNU as. */
10044 if (lastfile == 0 || strcmp (filename, lastfile))
10047 ggc_add_string_root ((char **) &lastfile, 1);
10049 fprintf (asm_out_file, "\t.file 0 \"%s\"\n", filename);
10050 lastfile = filename;
10053 fprintf (asm_out_file, "\t.loc 0 %d 0\n", line);
10055 /* Indicate that line number info exists. */
10056 ++line_info_table_in_use;
10058 /* Indicate that multiple line number tables exist. */
10059 if (DECL_SECTION_NAME (current_function_decl))
10060 ++separate_line_info_table_in_use;
10062 else if (DECL_SECTION_NAME (current_function_decl))
10064 register dw_separate_line_info_ref line_info;
10065 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
10066 separate_line_info_table_in_use);
10067 if (flag_debug_asm)
10068 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
10069 fputc ('\n', asm_out_file);
10071 /* expand the line info table if necessary */
10072 if (separate_line_info_table_in_use
10073 == separate_line_info_table_allocated)
10075 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
10076 separate_line_info_table
10077 = (dw_separate_line_info_ref)
10078 xrealloc (separate_line_info_table,
10079 separate_line_info_table_allocated
10080 * sizeof (dw_separate_line_info_entry));
10083 /* Add the new entry at the end of the line_info_table. */
10085 = &separate_line_info_table[separate_line_info_table_in_use++];
10086 line_info->dw_file_num = lookup_filename (filename);
10087 line_info->dw_line_num = line;
10088 line_info->function = current_funcdef_number;
10092 register dw_line_info_ref line_info;
10094 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
10095 line_info_table_in_use);
10096 if (flag_debug_asm)
10097 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
10098 fputc ('\n', asm_out_file);
10100 /* Expand the line info table if necessary. */
10101 if (line_info_table_in_use == line_info_table_allocated)
10103 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
10105 = (dw_line_info_ref)
10106 xrealloc (line_info_table,
10107 (line_info_table_allocated
10108 * sizeof (dw_line_info_entry)));
10111 /* Add the new entry at the end of the line_info_table. */
10112 line_info = &line_info_table[line_info_table_in_use++];
10113 line_info->dw_file_num = lookup_filename (filename);
10114 line_info->dw_line_num = line;
10119 /* Record the beginning of a new source file, for later output
10120 of the .debug_macinfo section. At present, unimplemented. */
10123 dwarf2out_start_source_file (filename)
10124 register const char *filename ATTRIBUTE_UNUSED;
10128 /* Record the end of a source file, for later output
10129 of the .debug_macinfo section. At present, unimplemented. */
10132 dwarf2out_end_source_file ()
10136 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10137 the tail part of the directive line, i.e. the part which is past the
10138 initial whitespace, #, whitespace, directive-name, whitespace part. */
10141 dwarf2out_define (lineno, buffer)
10142 register unsigned lineno ATTRIBUTE_UNUSED;
10143 register const char *buffer ATTRIBUTE_UNUSED;
10145 static int initialized = 0;
10148 dwarf2out_start_source_file (primary_filename);
10153 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10154 the tail part of the directive line, i.e. the part which is past the
10155 initial whitespace, #, whitespace, directive-name, whitespace part. */
10158 dwarf2out_undef (lineno, buffer)
10159 register unsigned lineno ATTRIBUTE_UNUSED;
10160 register const char *buffer ATTRIBUTE_UNUSED;
10164 /* Set up for Dwarf output at the start of compilation. */
10167 dwarf2out_init (asm_out_file, main_input_filename)
10168 register FILE *asm_out_file;
10169 register const char *main_input_filename;
10171 /* Remember the name of the primary input file. */
10172 primary_filename = main_input_filename;
10174 /* Allocate the initial hunk of the file_table. */
10175 file_table = (char **) xcalloc (FILE_TABLE_INCREMENT, sizeof (char *));
10176 file_table_allocated = FILE_TABLE_INCREMENT;
10178 /* Skip the first entry - file numbers begin at 1. */
10179 file_table_in_use = 1;
10181 /* Allocate the initial hunk of the decl_die_table. */
10183 = (dw_die_ref *) xcalloc (DECL_DIE_TABLE_INCREMENT, sizeof (dw_die_ref));
10184 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
10185 decl_die_table_in_use = 0;
10187 /* Allocate the initial hunk of the decl_scope_table. */
10189 = (tree *) xcalloc (DECL_SCOPE_TABLE_INCREMENT, sizeof (tree));
10190 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
10191 decl_scope_depth = 0;
10193 /* Allocate the initial hunk of the abbrev_die_table. */
10195 = (dw_die_ref *) xcalloc (ABBREV_DIE_TABLE_INCREMENT,
10196 sizeof (dw_die_ref));
10197 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
10198 /* Zero-th entry is allocated, but unused */
10199 abbrev_die_table_in_use = 1;
10201 /* Allocate the initial hunk of the line_info_table. */
10203 = (dw_line_info_ref) xcalloc (LINE_INFO_TABLE_INCREMENT,
10204 sizeof (dw_line_info_entry));
10205 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
10206 /* Zero-th entry is allocated, but unused */
10207 line_info_table_in_use = 1;
10209 /* Generate the initial DIE for the .debug section. Note that the (string)
10210 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
10211 will (typically) be a relative pathname and that this pathname should be
10212 taken as being relative to the directory from which the compiler was
10213 invoked when the given (base) source file was compiled. */
10214 comp_unit_die = gen_compile_unit_die (main_input_filename);
10218 VARRAY_RTX_INIT (used_rtx_varray, 32, "used_rtx_varray");
10219 ggc_add_rtx_varray_root (&used_rtx_varray, 1);
10222 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
10223 ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, ABBREV_SECTION_LABEL, 0);
10224 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10225 ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0);
10227 strcpy (text_section_label, stripattributes (TEXT_SECTION));
10228 ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label,
10229 DEBUG_INFO_SECTION_LABEL, 0);
10230 ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label,
10231 DEBUG_LINE_SECTION_LABEL, 0);
10233 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10234 ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
10235 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10237 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10238 ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
10240 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10241 ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
10242 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10243 ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
10246 /* Output stuff that dwarf requires at the end of every file,
10247 and generate the DWARF-2 debugging info. */
10250 dwarf2out_finish ()
10252 limbo_die_node *node, *next_node;
10255 /* Traverse the limbo die list, and add parent/child links. The only
10256 dies without parents that should be here are concrete instances of
10257 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
10258 For concrete instances, we can get the parent die from the abstract
10260 for (node = limbo_die_list; node; node = next_node)
10262 next_node = node->next;
10265 if (die->die_parent == NULL)
10267 dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin);
10269 add_child_die (origin->die_parent, die);
10270 else if (die == comp_unit_die)
10277 limbo_die_list = NULL;
10279 /* Walk through the list of incomplete types again, trying once more to
10280 emit full debugging info for them. */
10281 retry_incomplete_types ();
10283 /* Traverse the DIE's, reverse their lists of attributes and children,
10284 and add add sibling attributes to those DIE's that have children. */
10285 add_sibling_attributes (comp_unit_die);
10287 /* Output a terminator label for the .text section. */
10288 fputc ('\n', asm_out_file);
10289 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10290 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
10293 /* Output a terminator label for the .data section. */
10294 fputc ('\n', asm_out_file);
10295 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
10296 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
10298 /* Output a terminator label for the .bss section. */
10299 fputc ('\n', asm_out_file);
10300 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
10301 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
10304 /* Output the source line correspondence table. */
10305 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
10307 if (! DWARF2_ASM_LINE_DEBUG_INFO)
10309 fputc ('\n', asm_out_file);
10310 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10311 output_line_info ();
10314 /* We can only use the low/high_pc attributes if all of the code
10316 if (separate_line_info_table_in_use == 0)
10318 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label);
10319 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
10322 add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list,
10323 debug_line_section_label);
10326 #if 0 /* unimplemented */
10327 if (debug_info_level >= DINFO_LEVEL_VERBOSE && primary)
10328 add_AT_unsigned (die, DW_AT_macro_info, 0);
10331 /* Output the abbreviation table. */
10332 fputc ('\n', asm_out_file);
10333 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10334 build_abbrev_table (comp_unit_die);
10335 output_abbrev_section ();
10337 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
10338 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
10339 calc_die_sizes (comp_unit_die);
10341 /* Output debugging information. */
10342 fputc ('\n', asm_out_file);
10343 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10344 output_compilation_unit_header ();
10345 output_die (comp_unit_die);
10347 if (pubname_table_in_use)
10349 /* Output public names table. */
10350 fputc ('\n', asm_out_file);
10351 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
10352 output_pubnames ();
10355 /* We only put functions in the arange table, so don't write it out if
10356 we don't have any. */
10357 if (fde_table_in_use)
10359 /* Output the address range information. */
10360 fputc ('\n', asm_out_file);
10361 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
10365 #endif /* DWARF2_DEBUGGING_INFO */