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 /* Record call frame debugging information for an expression, which either
1212 sets SP or FP (adjusting how we calculate the frame address) or saves a
1213 register to the stack. */
1216 dwarf2out_frame_debug_expr (expr, label)
1223 /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of
1224 the PARALLEL independantly. The first element is always processed if
1225 it is a SET. This is for backward compatability. Other elements
1226 are processed only if they are SETs and the RTX_FRAME_RELATED_P
1227 flag is set in them. */
1229 if (GET_CODE (expr) == PARALLEL)
1232 int limit = XVECLEN (expr, 0);
1234 for (par_index = 0; par_index < limit; par_index++)
1236 rtx x = XVECEXP (expr, 0, par_index);
1238 if (GET_CODE (x) == SET &&
1239 (RTX_FRAME_RELATED_P (x) || par_index == 0))
1240 dwarf2out_frame_debug_expr (x, label);
1245 if (GET_CODE (expr) != SET)
1248 src = SET_SRC (expr);
1249 dest = SET_DEST (expr);
1251 switch (GET_CODE (dest))
1254 /* Update the CFA rule wrt SP or FP. Make sure src is
1255 relative to the current CFA register. */
1256 switch (GET_CODE (src))
1258 /* Setting FP from SP. */
1260 if (cfa.reg != (unsigned) REGNO (src))
1263 /* We used to require that dest be either SP or FP, but the
1264 ARM copies SP to a temporary register, and from there to
1265 FP. So we just rely on the backends to only set
1266 RTX_FRAME_RELATED_P on appropriate insns. */
1267 cfa.reg = REGNO (dest);
1272 if (dest == stack_pointer_rtx)
1275 switch (GET_CODE (XEXP (src, 1)))
1278 offset = INTVAL (XEXP (src, 1));
1281 if ((unsigned) REGNO (XEXP (src, 1)) != cfa_temp_reg)
1283 offset = cfa_temp_value;
1289 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1291 /* Restoring SP from FP in the epilogue. */
1292 if (cfa.reg != (unsigned) HARD_FRAME_POINTER_REGNUM)
1294 cfa.reg = STACK_POINTER_REGNUM;
1296 else if (XEXP (src, 0) != stack_pointer_rtx)
1299 if (GET_CODE (src) == PLUS)
1301 if (cfa.reg == STACK_POINTER_REGNUM)
1302 cfa.offset += offset;
1303 if (cfa_store.reg == STACK_POINTER_REGNUM)
1304 cfa_store.offset += offset;
1306 else if (dest == hard_frame_pointer_rtx)
1308 /* Either setting the FP from an offset of the SP,
1309 or adjusting the FP */
1310 if (! frame_pointer_needed)
1313 if (GET_CODE (XEXP (src, 0)) == REG
1314 && (unsigned) REGNO (XEXP (src, 0)) == cfa.reg
1315 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1317 offset = INTVAL (XEXP (src, 1));
1318 if (GET_CODE (src) == PLUS)
1320 cfa.offset += offset;
1321 cfa.reg = HARD_FRAME_POINTER_REGNUM;
1328 if (GET_CODE (src) != PLUS
1329 || XEXP (src, 1) != stack_pointer_rtx)
1331 if (GET_CODE (XEXP (src, 0)) != REG
1332 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg)
1334 if (cfa.reg != STACK_POINTER_REGNUM)
1336 cfa_store.reg = REGNO (dest);
1337 cfa_store.offset = cfa.offset - cfa_temp_value;
1342 cfa_temp_reg = REGNO (dest);
1343 cfa_temp_value = INTVAL (src);
1347 if (GET_CODE (XEXP (src, 0)) != REG
1348 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg
1349 || (unsigned) REGNO (dest) != cfa_temp_reg
1350 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1352 cfa_temp_value |= INTVAL (XEXP (src, 1));
1358 def_cfa_1 (label, &cfa);
1361 /* Skip over HIGH, assuming it will be followed by a LO_SUM, which
1362 will fill in all of the bits. */
1367 cfa_temp_reg = REGNO (dest);
1368 cfa_temp_value = INTVAL (XEXP (src, 1));
1372 if (GET_CODE (src) != REG)
1375 /* If the src is our current CFA, and it isn't the SP or FP, then we're
1376 going to have to use an indrect mechanism. */
1377 if (REGNO (src) != STACK_POINTER_REGNUM
1378 && REGNO (src) != HARD_FRAME_POINTER_REGNUM
1379 && (unsigned) REGNO (src) == cfa.reg)
1381 /* We currently allow this to be ONLY a MEM or MEM + offset. */
1382 rtx x = XEXP (dest, 0);
1384 if (GET_CODE (x) == PLUS || GET_CODE (x) == MINUS)
1386 offset = INTVAL (XEXP (x, 1));
1387 if (GET_CODE (x) == MINUS)
1391 if (GET_CODE (x) != REG)
1393 cfa.reg = (unsigned) REGNO (x);
1394 cfa.base_offset = offset;
1396 def_cfa_1 (label, &cfa);
1400 /* Saving a register to the stack. Make sure dest is relative to the
1402 switch (GET_CODE (XEXP (dest, 0)))
1407 offset = GET_MODE_SIZE (GET_MODE (dest));
1408 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1411 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1412 || cfa_store.reg != STACK_POINTER_REGNUM)
1414 cfa_store.offset += offset;
1415 if (cfa.reg == STACK_POINTER_REGNUM)
1416 cfa.offset = cfa_store.offset;
1418 offset = -cfa_store.offset;
1421 /* With an offset. */
1424 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1425 if (GET_CODE (XEXP (dest, 0)) == MINUS)
1428 if (cfa_store.reg != (unsigned) REGNO (XEXP (XEXP (dest, 0), 0)))
1430 offset -= cfa_store.offset;
1433 /* Without an offset. */
1435 if (cfa_store.reg != (unsigned) REGNO (XEXP (dest, 0)))
1437 offset = -cfa_store.offset;
1443 def_cfa_1 (label, &cfa);
1444 dwarf2out_reg_save (label, REGNO (src), offset);
1453 /* Record call frame debugging information for INSN, which either
1454 sets SP or FP (adjusting how we calculate the frame address) or saves a
1455 register to the stack. If INSN is NULL_RTX, initialize our state. */
1458 dwarf2out_frame_debug (insn)
1464 if (insn == NULL_RTX)
1466 /* Set up state for generating call frame debug info. */
1468 if (cfa.reg != (unsigned long) DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1470 cfa.reg = STACK_POINTER_REGNUM;
1477 if (! RTX_FRAME_RELATED_P (insn))
1479 dwarf2out_stack_adjust (insn);
1483 label = dwarf2out_cfi_label ();
1485 src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX);
1487 insn = XEXP (src, 0);
1489 insn = PATTERN (insn);
1491 dwarf2out_frame_debug_expr (insn, label);
1494 /* Return the size of an unsigned LEB128 quantity. */
1496 static inline unsigned long
1497 size_of_uleb128 (value)
1498 register unsigned long value;
1500 register unsigned long size = 0;
1501 register unsigned byte;
1505 byte = (value & 0x7f);
1514 /* Return the size of a signed LEB128 quantity. */
1516 static inline unsigned long
1517 size_of_sleb128 (value)
1518 register long value;
1520 register unsigned long size = 0;
1521 register unsigned byte;
1525 byte = (value & 0x7f);
1529 while (!(((value == 0) && ((byte & 0x40) == 0))
1530 || ((value == -1) && ((byte & 0x40) != 0))));
1535 /* Output an unsigned LEB128 quantity. */
1538 output_uleb128 (value)
1539 register unsigned long value;
1541 unsigned long save_value = value;
1543 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1546 register unsigned byte = (value & 0x7f);
1549 /* More bytes to follow. */
1552 fprintf (asm_out_file, "0x%x", byte);
1554 fprintf (asm_out_file, ",");
1559 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1562 /* Output an signed LEB128 quantity. */
1565 output_sleb128 (value)
1566 register long value;
1569 register unsigned byte;
1570 long save_value = value;
1572 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1575 byte = (value & 0x7f);
1576 /* arithmetic shift */
1578 more = !((((value == 0) && ((byte & 0x40) == 0))
1579 || ((value == -1) && ((byte & 0x40) != 0))));
1583 fprintf (asm_out_file, "0x%x", byte);
1585 fprintf (asm_out_file, ",");
1590 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1593 /* Output a Call Frame Information opcode and its operand(s). */
1596 output_cfi (cfi, fde)
1597 register dw_cfi_ref cfi;
1598 register dw_fde_ref fde;
1600 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1602 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1604 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1606 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1607 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1608 fputc ('\n', asm_out_file);
1611 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1613 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1615 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1617 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1618 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1620 fputc ('\n', asm_out_file);
1621 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1622 fputc ('\n', asm_out_file);
1624 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1626 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1628 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1630 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1631 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1633 fputc ('\n', asm_out_file);
1637 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1639 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1640 dwarf_cfi_name (cfi->dw_cfi_opc));
1642 fputc ('\n', asm_out_file);
1643 switch (cfi->dw_cfi_opc)
1645 case DW_CFA_set_loc:
1646 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1647 fputc ('\n', asm_out_file);
1649 case DW_CFA_advance_loc1:
1650 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1651 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1652 fde->dw_fde_current_label);
1653 fputc ('\n', asm_out_file);
1654 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1656 case DW_CFA_advance_loc2:
1657 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1658 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1659 fde->dw_fde_current_label);
1660 fputc ('\n', asm_out_file);
1661 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1663 case DW_CFA_advance_loc4:
1664 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1665 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1666 fde->dw_fde_current_label);
1667 fputc ('\n', asm_out_file);
1668 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1670 #ifdef MIPS_DEBUGGING_INFO
1671 case DW_CFA_MIPS_advance_loc8:
1672 /* TODO: not currently implemented. */
1676 case DW_CFA_offset_extended:
1677 case DW_CFA_GNU_negative_offset_extended:
1678 case DW_CFA_def_cfa:
1679 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1680 fputc ('\n', asm_out_file);
1681 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1682 fputc ('\n', asm_out_file);
1684 case DW_CFA_restore_extended:
1685 case DW_CFA_undefined:
1686 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1687 fputc ('\n', asm_out_file);
1689 case DW_CFA_same_value:
1690 case DW_CFA_def_cfa_register:
1691 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1692 fputc ('\n', asm_out_file);
1694 case DW_CFA_register:
1695 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1696 fputc ('\n', asm_out_file);
1697 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1698 fputc ('\n', asm_out_file);
1700 case DW_CFA_def_cfa_offset:
1701 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1702 fputc ('\n', asm_out_file);
1704 case DW_CFA_GNU_window_save:
1706 case DW_CFA_GNU_args_size:
1707 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1708 fputc ('\n', asm_out_file);
1710 case DW_CFA_def_cfa_expression:
1711 output_cfa_loc (cfi);
1719 /* Output the call frame information used to used to record information
1720 that relates to calculating the frame pointer, and records the
1721 location of saved registers. */
1724 output_call_frame_info (for_eh)
1727 register unsigned long i;
1728 register dw_fde_ref fde;
1729 register dw_cfi_ref cfi;
1730 char l1[20], l2[20];
1731 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1735 /* Do we want to include a pointer to the exception table? */
1736 int eh_ptr = for_eh && exception_table_p ();
1738 /* If we don't have any functions we'll want to unwind out of, don't
1739 emit any EH unwind information. */
1742 for (i = 0; i < fde_table_in_use; ++i)
1743 if (! fde_table[i].nothrow)
1749 fputc ('\n', asm_out_file);
1751 /* We're going to be generating comments, so turn on app. */
1757 #ifdef EH_FRAME_SECTION
1758 EH_FRAME_SECTION ();
1760 tree label = get_file_function_name ('F');
1762 force_data_section ();
1763 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1764 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1765 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1767 assemble_label ("__FRAME_BEGIN__");
1770 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1772 /* Output the CIE. */
1773 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1774 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1775 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1776 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1778 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1780 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1783 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1785 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1788 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1791 fputc ('\n', asm_out_file);
1792 ASM_OUTPUT_LABEL (asm_out_file, l1);
1795 /* Now that the CIE pointer is PC-relative for EH,
1796 use 0 to identify the CIE. */
1797 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1799 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1802 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1804 fputc ('\n', asm_out_file);
1805 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1807 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1808 fputc ('\n', asm_out_file);
1811 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1813 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1815 fputc ('\n', asm_out_file);
1818 /* The CIE contains a pointer to the exception region info for the
1819 frame. Make the augmentation string three bytes (including the
1820 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1821 can't handle unaligned relocs. */
1824 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1825 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1829 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1831 fputc ('\n', asm_out_file);
1833 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1835 fprintf (asm_out_file, "\t%s pointer to exception region info",
1840 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1842 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1846 fputc ('\n', asm_out_file);
1849 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1851 fputc ('\n', asm_out_file);
1852 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1854 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1856 fputc ('\n', asm_out_file);
1857 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1859 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1861 fputc ('\n', asm_out_file);
1863 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1864 output_cfi (cfi, NULL);
1866 /* Pad the CIE out to an address sized boundary. */
1867 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1868 ASM_OUTPUT_LABEL (asm_out_file, l2);
1869 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1870 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1872 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1873 fputc ('\n', asm_out_file);
1876 /* Loop through all of the FDE's. */
1877 for (i = 0; i < fde_table_in_use; ++i)
1879 fde = &fde_table[i];
1881 /* Don't emit EH unwind info for leaf functions. */
1882 if (for_eh && fde->nothrow)
1885 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1886 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1887 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1888 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1890 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1892 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1895 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1897 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1900 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1901 fputc ('\n', asm_out_file);
1902 ASM_OUTPUT_LABEL (asm_out_file, l1);
1904 /* ??? This always emits a 4 byte offset when for_eh is true, but it
1905 emits a target dependent sized offset when for_eh is not true.
1906 This inconsistency may confuse gdb. The only case where we need a
1907 non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI
1908 compatibility if we emit a 4 byte offset. We need a 4 byte offset
1909 though in order to be compatible with the dwarf_fde struct in frame.c.
1910 If the for_eh case is changed, then the struct in frame.c has
1911 to be adjusted appropriately. */
1913 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l1, "__FRAME_BEGIN__");
1915 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1917 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1919 fputc ('\n', asm_out_file);
1920 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1922 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1924 fputc ('\n', asm_out_file);
1925 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1926 fde->dw_fde_end, fde->dw_fde_begin);
1928 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1930 fputc ('\n', asm_out_file);
1932 /* Loop through the Call Frame Instructions associated with
1934 fde->dw_fde_current_label = fde->dw_fde_begin;
1935 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1936 output_cfi (cfi, fde);
1938 /* Pad the FDE out to an address sized boundary. */
1939 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1940 ASM_OUTPUT_LABEL (asm_out_file, l2);
1941 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1942 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1944 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1945 fputc ('\n', asm_out_file);
1948 #ifndef EH_FRAME_SECTION
1951 /* Emit terminating zero for table. */
1952 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1953 fputc ('\n', asm_out_file);
1956 #ifdef MIPS_DEBUGGING_INFO
1957 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1958 get a value of 0. Putting .align 0 after the label fixes it. */
1959 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1962 /* Turn off app to make assembly quicker. */
1967 /* Output a marker (i.e. a label) for the beginning of a function, before
1971 dwarf2out_begin_prologue ()
1973 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1974 register dw_fde_ref fde;
1976 ++current_funcdef_number;
1978 function_section (current_function_decl);
1979 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1980 current_funcdef_number);
1981 ASM_OUTPUT_LABEL (asm_out_file, label);
1982 current_function_func_begin_label = get_identifier (label);
1984 /* Expand the fde table if necessary. */
1985 if (fde_table_in_use == fde_table_allocated)
1987 fde_table_allocated += FDE_TABLE_INCREMENT;
1989 = (dw_fde_ref) xrealloc (fde_table,
1990 fde_table_allocated * sizeof (dw_fde_node));
1993 /* Record the FDE associated with this function. */
1994 current_funcdef_fde = fde_table_in_use;
1996 /* Add the new FDE at the end of the fde_table. */
1997 fde = &fde_table[fde_table_in_use++];
1998 fde->dw_fde_begin = xstrdup (label);
1999 fde->dw_fde_current_label = NULL;
2000 fde->dw_fde_end = NULL;
2001 fde->dw_fde_cfi = NULL;
2002 fde->nothrow = current_function_nothrow;
2004 args_size = old_args_size = 0;
2007 /* Output a marker (i.e. a label) for the absolute end of the generated code
2008 for a function definition. This gets called *after* the epilogue code has
2012 dwarf2out_end_epilogue ()
2015 char label[MAX_ARTIFICIAL_LABEL_BYTES];
2017 /* Output a label to mark the endpoint of the code generated for this
2019 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
2020 ASM_OUTPUT_LABEL (asm_out_file, label);
2021 fde = &fde_table[fde_table_in_use - 1];
2022 fde->dw_fde_end = xstrdup (label);
2026 dwarf2out_frame_init ()
2028 /* Allocate the initial hunk of the fde_table. */
2029 fde_table = (dw_fde_ref) xcalloc (FDE_TABLE_INCREMENT, sizeof (dw_fde_node));
2030 fde_table_allocated = FDE_TABLE_INCREMENT;
2031 fde_table_in_use = 0;
2033 /* Generate the CFA instructions common to all FDE's. Do it now for the
2034 sake of lookup_cfa. */
2036 #ifdef DWARF2_UNWIND_INFO
2037 /* On entry, the Canonical Frame Address is at SP. */
2038 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
2039 initial_return_save (INCOMING_RETURN_ADDR_RTX);
2044 dwarf2out_frame_finish ()
2046 /* Output call frame information. */
2047 #ifdef MIPS_DEBUGGING_INFO
2048 if (write_symbols == DWARF2_DEBUG)
2049 output_call_frame_info (0);
2050 if (flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp))
2051 output_call_frame_info (1);
2053 if (write_symbols == DWARF2_DEBUG
2054 || flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp))
2055 output_call_frame_info (1);
2059 /* And now, the subset of the debugging information support code necessary
2060 for emitting location expressions. */
2062 typedef struct dw_val_struct *dw_val_ref;
2063 typedef struct die_struct *dw_die_ref;
2064 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2066 /* Each DIE may have a series of attribute/value pairs. Values
2067 can take on several forms. The forms that are used in this
2068 implementation are listed below. */
2075 dw_val_class_unsigned_const,
2076 dw_val_class_long_long,
2079 dw_val_class_die_ref,
2080 dw_val_class_fde_ref,
2081 dw_val_class_lbl_id,
2082 dw_val_class_lbl_offset,
2087 /* Describe a double word constant value. */
2088 /* ??? Every instance of long_long in the code really means CONST_DOUBLE. */
2090 typedef struct dw_long_long_struct
2097 /* Describe a floating point constant value. */
2099 typedef struct dw_fp_struct
2106 /* The dw_val_node describes an attribute's value, as it is
2107 represented internally. */
2109 typedef struct dw_val_struct
2111 dw_val_class val_class;
2115 dw_loc_descr_ref val_loc;
2117 long unsigned val_unsigned;
2118 dw_long_long_const val_long_long;
2119 dw_float_const val_float;
2120 dw_die_ref val_die_ref;
2121 unsigned val_fde_index;
2124 unsigned char val_flag;
2130 /* Locations in memory are described using a sequence of stack machine
2133 typedef struct dw_loc_descr_struct
2135 dw_loc_descr_ref dw_loc_next;
2136 enum dwarf_location_atom dw_loc_opc;
2137 dw_val_node dw_loc_oprnd1;
2138 dw_val_node dw_loc_oprnd2;
2142 static const char *dwarf_stack_op_name PARAMS ((unsigned));
2143 static dw_loc_descr_ref new_loc_descr PARAMS ((enum dwarf_location_atom,
2146 static void add_loc_descr PARAMS ((dw_loc_descr_ref *,
2148 static unsigned long size_of_loc_descr PARAMS ((dw_loc_descr_ref));
2149 static unsigned long size_of_locs PARAMS ((dw_loc_descr_ref));
2150 static void output_loc_operands PARAMS ((dw_loc_descr_ref));
2151 static void output_loc_sequence PARAMS ((dw_loc_descr_ref));
2153 /* Convert a DWARF stack opcode into its string name. */
2156 dwarf_stack_op_name (op)
2157 register unsigned op;
2162 return "DW_OP_addr";
2164 return "DW_OP_deref";
2166 return "DW_OP_const1u";
2168 return "DW_OP_const1s";
2170 return "DW_OP_const2u";
2172 return "DW_OP_const2s";
2174 return "DW_OP_const4u";
2176 return "DW_OP_const4s";
2178 return "DW_OP_const8u";
2180 return "DW_OP_const8s";
2182 return "DW_OP_constu";
2184 return "DW_OP_consts";
2188 return "DW_OP_drop";
2190 return "DW_OP_over";
2192 return "DW_OP_pick";
2194 return "DW_OP_swap";
2198 return "DW_OP_xderef";
2206 return "DW_OP_minus";
2218 return "DW_OP_plus";
2219 case DW_OP_plus_uconst:
2220 return "DW_OP_plus_uconst";
2226 return "DW_OP_shra";
2244 return "DW_OP_skip";
2246 return "DW_OP_lit0";
2248 return "DW_OP_lit1";
2250 return "DW_OP_lit2";
2252 return "DW_OP_lit3";
2254 return "DW_OP_lit4";
2256 return "DW_OP_lit5";
2258 return "DW_OP_lit6";
2260 return "DW_OP_lit7";
2262 return "DW_OP_lit8";
2264 return "DW_OP_lit9";
2266 return "DW_OP_lit10";
2268 return "DW_OP_lit11";
2270 return "DW_OP_lit12";
2272 return "DW_OP_lit13";
2274 return "DW_OP_lit14";
2276 return "DW_OP_lit15";
2278 return "DW_OP_lit16";
2280 return "DW_OP_lit17";
2282 return "DW_OP_lit18";
2284 return "DW_OP_lit19";
2286 return "DW_OP_lit20";
2288 return "DW_OP_lit21";
2290 return "DW_OP_lit22";
2292 return "DW_OP_lit23";
2294 return "DW_OP_lit24";
2296 return "DW_OP_lit25";
2298 return "DW_OP_lit26";
2300 return "DW_OP_lit27";
2302 return "DW_OP_lit28";
2304 return "DW_OP_lit29";
2306 return "DW_OP_lit30";
2308 return "DW_OP_lit31";
2310 return "DW_OP_reg0";
2312 return "DW_OP_reg1";
2314 return "DW_OP_reg2";
2316 return "DW_OP_reg3";
2318 return "DW_OP_reg4";
2320 return "DW_OP_reg5";
2322 return "DW_OP_reg6";
2324 return "DW_OP_reg7";
2326 return "DW_OP_reg8";
2328 return "DW_OP_reg9";
2330 return "DW_OP_reg10";
2332 return "DW_OP_reg11";
2334 return "DW_OP_reg12";
2336 return "DW_OP_reg13";
2338 return "DW_OP_reg14";
2340 return "DW_OP_reg15";
2342 return "DW_OP_reg16";
2344 return "DW_OP_reg17";
2346 return "DW_OP_reg18";
2348 return "DW_OP_reg19";
2350 return "DW_OP_reg20";
2352 return "DW_OP_reg21";
2354 return "DW_OP_reg22";
2356 return "DW_OP_reg23";
2358 return "DW_OP_reg24";
2360 return "DW_OP_reg25";
2362 return "DW_OP_reg26";
2364 return "DW_OP_reg27";
2366 return "DW_OP_reg28";
2368 return "DW_OP_reg29";
2370 return "DW_OP_reg30";
2372 return "DW_OP_reg31";
2374 return "DW_OP_breg0";
2376 return "DW_OP_breg1";
2378 return "DW_OP_breg2";
2380 return "DW_OP_breg3";
2382 return "DW_OP_breg4";
2384 return "DW_OP_breg5";
2386 return "DW_OP_breg6";
2388 return "DW_OP_breg7";
2390 return "DW_OP_breg8";
2392 return "DW_OP_breg9";
2394 return "DW_OP_breg10";
2396 return "DW_OP_breg11";
2398 return "DW_OP_breg12";
2400 return "DW_OP_breg13";
2402 return "DW_OP_breg14";
2404 return "DW_OP_breg15";
2406 return "DW_OP_breg16";
2408 return "DW_OP_breg17";
2410 return "DW_OP_breg18";
2412 return "DW_OP_breg19";
2414 return "DW_OP_breg20";
2416 return "DW_OP_breg21";
2418 return "DW_OP_breg22";
2420 return "DW_OP_breg23";
2422 return "DW_OP_breg24";
2424 return "DW_OP_breg25";
2426 return "DW_OP_breg26";
2428 return "DW_OP_breg27";
2430 return "DW_OP_breg28";
2432 return "DW_OP_breg29";
2434 return "DW_OP_breg30";
2436 return "DW_OP_breg31";
2438 return "DW_OP_regx";
2440 return "DW_OP_fbreg";
2442 return "DW_OP_bregx";
2444 return "DW_OP_piece";
2445 case DW_OP_deref_size:
2446 return "DW_OP_deref_size";
2447 case DW_OP_xderef_size:
2448 return "DW_OP_xderef_size";
2452 return "OP_<unknown>";
2457 /* Return a pointer to a newly allocated location description. Location
2458 descriptions are simple expression terms that can be strung
2459 together to form more complicated location (address) descriptions. */
2461 static inline dw_loc_descr_ref
2462 new_loc_descr (op, oprnd1, oprnd2)
2463 register enum dwarf_location_atom op;
2464 register unsigned long oprnd1;
2465 register unsigned long oprnd2;
2467 register dw_loc_descr_ref descr
2468 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
2470 descr->dw_loc_next = NULL;
2471 descr->dw_loc_opc = op;
2472 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
2473 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
2474 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
2475 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
2480 /* Add a location description term to a location description expression. */
2483 add_loc_descr (list_head, descr)
2484 register dw_loc_descr_ref *list_head;
2485 register dw_loc_descr_ref descr;
2487 register dw_loc_descr_ref *d;
2489 /* Find the end of the chain. */
2490 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
2496 /* Return the size of a location descriptor. */
2498 static unsigned long
2499 size_of_loc_descr (loc)
2500 register dw_loc_descr_ref loc;
2502 register unsigned long size = 1;
2504 switch (loc->dw_loc_opc)
2507 size += DWARF2_ADDR_SIZE;
2526 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2529 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2534 case DW_OP_plus_uconst:
2535 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2573 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2576 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2579 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2582 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2583 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
2586 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2588 case DW_OP_deref_size:
2589 case DW_OP_xderef_size:
2599 /* Return the size of a series of location descriptors. */
2601 static unsigned long
2603 register dw_loc_descr_ref loc;
2605 register unsigned long size = 0;
2607 for (; loc != NULL; loc = loc->dw_loc_next)
2608 size += size_of_loc_descr (loc);
2613 /* Output location description stack opcode's operands (if any). */
2616 output_loc_operands (loc)
2617 register dw_loc_descr_ref loc;
2619 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
2620 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
2622 switch (loc->dw_loc_opc)
2624 #ifdef DWARF2_DEBUGGING_INFO
2626 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
2627 fputc ('\n', asm_out_file);
2631 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
2632 fputc ('\n', asm_out_file);
2636 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
2637 fputc ('\n', asm_out_file);
2642 fputc ('\n', asm_out_file);
2646 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
2647 fputc ('\n', asm_out_file);
2659 /* We currently don't make any attempt to make sure these are
2660 aligned properly like we do for the main unwind info, so
2661 don't support emitting things larger than a byte if we're
2662 only doing unwinding. */
2667 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
2668 fputc ('\n', asm_out_file);
2671 output_uleb128 (val1->v.val_unsigned);
2672 fputc ('\n', asm_out_file);
2675 output_sleb128 (val1->v.val_int);
2676 fputc ('\n', asm_out_file);
2679 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
2680 fputc ('\n', asm_out_file);
2682 case DW_OP_plus_uconst:
2683 output_uleb128 (val1->v.val_unsigned);
2684 fputc ('\n', asm_out_file);
2718 output_sleb128 (val1->v.val_int);
2719 fputc ('\n', asm_out_file);
2722 output_uleb128 (val1->v.val_unsigned);
2723 fputc ('\n', asm_out_file);
2726 output_sleb128 (val1->v.val_int);
2727 fputc ('\n', asm_out_file);
2730 output_uleb128 (val1->v.val_unsigned);
2731 fputc ('\n', asm_out_file);
2732 output_sleb128 (val2->v.val_int);
2733 fputc ('\n', asm_out_file);
2736 output_uleb128 (val1->v.val_unsigned);
2737 fputc ('\n', asm_out_file);
2739 case DW_OP_deref_size:
2740 case DW_OP_xderef_size:
2741 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
2742 fputc ('\n', asm_out_file);
2745 /* Other codes have no operands. */
2750 /* Output a sequence of location operations. */
2753 output_loc_sequence (loc)
2754 dw_loc_descr_ref loc;
2756 for (; loc != NULL; loc = loc->dw_loc_next)
2758 /* Output the opcode. */
2759 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
2761 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
2762 dwarf_stack_op_name (loc->dw_loc_opc));
2764 fputc ('\n', asm_out_file);
2766 /* Output the operand(s) (if any). */
2767 output_loc_operands (loc);
2771 /* This routine will generate the correct assembly data for a location
2772 description based on a cfi entry with a complex address. */
2775 output_cfa_loc (cfi)
2778 dw_loc_descr_ref loc;
2781 /* Output the size of the block. */
2782 loc = cfi->dw_cfi_oprnd1.dw_cfi_loc;
2783 size = size_of_locs (loc);
2784 output_uleb128 (size);
2785 fputc ('\n', asm_out_file);
2787 /* Now output the operations themselves. */
2788 output_loc_sequence (loc);
2791 /* This function builds a dwarf location descriptor seqeunce from
2792 a dw_cfa_location. */
2794 static struct dw_loc_descr_struct *
2796 dw_cfa_location *cfa;
2798 struct dw_loc_descr_struct *head, *tmp;
2800 if (cfa->indirect == 0)
2803 if (cfa->base_offset)
2804 head = new_loc_descr (DW_OP_breg0 + cfa->reg, cfa->base_offset, 0);
2806 head = new_loc_descr (DW_OP_reg0 + cfa->reg, 0, 0);
2807 head->dw_loc_oprnd1.val_class = dw_val_class_const;
2808 tmp = new_loc_descr (DW_OP_deref, 0, 0);
2809 add_loc_descr (&head, tmp);
2810 if (cfa->offset != 0)
2812 tmp = new_loc_descr (DW_OP_plus_uconst, cfa->offset, 0);
2813 add_loc_descr (&head, tmp);
2818 /* This function fills in aa dw_cfa_location structure from a
2819 dwarf location descriptor sequence. */
2822 get_cfa_from_loc_descr (cfa, loc)
2823 dw_cfa_location *cfa;
2824 struct dw_loc_descr_struct * loc;
2826 struct dw_loc_descr_struct * ptr;
2828 cfa->base_offset = 0;
2832 for (ptr = loc; ptr != NULL; ptr = ptr->dw_loc_next)
2834 enum dwarf_location_atom op = ptr->dw_loc_opc;
2869 cfa->reg = op - DW_OP_reg0;
2872 cfa->reg = ptr->dw_loc_oprnd1.v.val_int;
2906 cfa->reg = op - DW_OP_breg0;
2907 cfa->base_offset = ptr->dw_loc_oprnd1.v.val_int;
2910 cfa->reg = ptr->dw_loc_oprnd1.v.val_int;
2911 cfa->base_offset = ptr->dw_loc_oprnd2.v.val_int;
2916 case DW_OP_plus_uconst:
2917 cfa->offset = ptr->dw_loc_oprnd1.v.val_unsigned;
2920 fatal ("DW_LOC_OP %s not implememnted yet.\n",
2921 dwarf_stack_op_name (ptr->dw_loc_opc));
2925 #endif /* .debug_frame support */
2927 /* And now, the support for symbolic debugging information. */
2928 #ifdef DWARF2_DEBUGGING_INFO
2930 /* NOTE: In the comments in this file, many references are made to
2931 "Debugging Information Entries". This term is abbreviated as `DIE'
2932 throughout the remainder of this file. */
2934 /* An internal representation of the DWARF output is built, and then
2935 walked to generate the DWARF debugging info. The walk of the internal
2936 representation is done after the entire program has been compiled.
2937 The types below are used to describe the internal representation. */
2939 /* Various DIE's use offsets relative to the beginning of the
2940 .debug_info section to refer to each other. */
2942 typedef long int dw_offset;
2944 /* Define typedefs here to avoid circular dependencies. */
2946 typedef struct dw_attr_struct *dw_attr_ref;
2947 typedef struct dw_line_info_struct *dw_line_info_ref;
2948 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2949 typedef struct pubname_struct *pubname_ref;
2950 typedef dw_die_ref *arange_ref;
2952 /* Each entry in the line_info_table maintains the file and
2953 line number associated with the label generated for that
2954 entry. The label gives the PC value associated with
2955 the line number entry. */
2957 typedef struct dw_line_info_struct
2959 unsigned long dw_file_num;
2960 unsigned long dw_line_num;
2964 /* Line information for functions in separate sections; each one gets its
2966 typedef struct dw_separate_line_info_struct
2968 unsigned long dw_file_num;
2969 unsigned long dw_line_num;
2970 unsigned long function;
2972 dw_separate_line_info_entry;
2974 /* Each DIE attribute has a field specifying the attribute kind,
2975 a link to the next attribute in the chain, and an attribute value.
2976 Attributes are typically linked below the DIE they modify. */
2978 typedef struct dw_attr_struct
2980 enum dwarf_attribute dw_attr;
2981 dw_attr_ref dw_attr_next;
2982 dw_val_node dw_attr_val;
2986 /* The Debugging Information Entry (DIE) structure */
2988 typedef struct die_struct
2990 enum dwarf_tag die_tag;
2991 dw_attr_ref die_attr;
2992 dw_die_ref die_parent;
2993 dw_die_ref die_child;
2995 dw_offset die_offset;
2996 unsigned long die_abbrev;
3000 /* The pubname structure */
3002 typedef struct pubname_struct
3009 /* The limbo die list structure. */
3010 typedef struct limbo_die_struct
3013 struct limbo_die_struct *next;
3017 /* How to start an assembler comment. */
3018 #ifndef ASM_COMMENT_START
3019 #define ASM_COMMENT_START ";#"
3022 /* Define a macro which returns non-zero for a TYPE_DECL which was
3023 implicitly generated for a tagged type.
3025 Note that unlike the gcc front end (which generates a NULL named
3026 TYPE_DECL node for each complete tagged type, each array type, and
3027 each function type node created) the g++ front end generates a
3028 _named_ TYPE_DECL node for each tagged type node created.
3029 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
3030 generate a DW_TAG_typedef DIE for them. */
3032 #define TYPE_DECL_IS_STUB(decl) \
3033 (DECL_NAME (decl) == NULL_TREE \
3034 || (DECL_ARTIFICIAL (decl) \
3035 && is_tagged_type (TREE_TYPE (decl)) \
3036 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
3037 /* This is necessary for stub decls that \
3038 appear in nested inline functions. */ \
3039 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
3040 && (decl_ultimate_origin (decl) \
3041 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
3043 /* Information concerning the compilation unit's programming
3044 language, and compiler version. */
3046 extern int flag_traditional;
3048 /* Fixed size portion of the DWARF compilation unit header. */
3049 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
3051 /* Fixed size portion of debugging line information prolog. */
3052 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
3054 /* Fixed size portion of public names info. */
3055 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
3057 /* Fixed size portion of the address range info. */
3058 #define DWARF_ARANGES_HEADER_SIZE \
3059 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \
3060 - DWARF_OFFSET_SIZE)
3062 /* Size of padding portion in the address range info. It must be
3063 aligned to twice the pointer size. */
3064 #define DWARF_ARANGES_PAD_SIZE \
3065 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \
3066 - (2 * DWARF_OFFSET_SIZE + 4))
3068 /* The default is to have gcc emit the line number tables. */
3069 #ifndef DWARF2_ASM_LINE_DEBUG_INFO
3070 #define DWARF2_ASM_LINE_DEBUG_INFO 0
3073 /* Define the architecture-dependent minimum instruction length (in bytes).
3074 In this implementation of DWARF, this field is used for information
3075 purposes only. Since GCC generates assembly language, we have
3076 no a priori knowledge of how many instruction bytes are generated
3077 for each source line, and therefore can use only the DW_LNE_set_address
3078 and DW_LNS_fixed_advance_pc line information commands. */
3080 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
3081 #define DWARF_LINE_MIN_INSTR_LENGTH 4
3084 /* Minimum line offset in a special line info. opcode.
3085 This value was chosen to give a reasonable range of values. */
3086 #define DWARF_LINE_BASE -10
3088 /* First special line opcde - leave room for the standard opcodes. */
3089 #define DWARF_LINE_OPCODE_BASE 10
3091 /* Range of line offsets in a special line info. opcode. */
3092 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
3094 /* Flag that indicates the initial value of the is_stmt_start flag.
3095 In the present implementation, we do not mark any lines as
3096 the beginning of a source statement, because that information
3097 is not made available by the GCC front-end. */
3098 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
3100 /* This location is used by calc_die_sizes() to keep track
3101 the offset of each DIE within the .debug_info section. */
3102 static unsigned long next_die_offset;
3104 /* Record the root of the DIE's built for the current compilation unit. */
3105 static dw_die_ref comp_unit_die;
3107 /* A list of DIEs with a NULL parent waiting to be relocated. */
3108 static limbo_die_node *limbo_die_list = 0;
3110 /* Pointer to an array of filenames referenced by this compilation unit. */
3111 static char **file_table;
3113 /* Total number of entries in the table (i.e. array) pointed to by
3114 `file_table'. This is the *total* and includes both used and unused
3116 static unsigned file_table_allocated;
3118 /* Number of entries in the file_table which are actually in use. */
3119 static unsigned file_table_in_use;
3121 /* Size (in elements) of increments by which we may expand the filename
3123 #define FILE_TABLE_INCREMENT 64
3125 /* Local pointer to the name of the main input file. Initialized in
3127 static const char *primary_filename;
3129 /* A pointer to the base of a table of references to DIE's that describe
3130 declarations. The table is indexed by DECL_UID() which is a unique
3131 number identifying each decl. */
3132 static dw_die_ref *decl_die_table;
3134 /* Number of elements currently allocated for the decl_die_table. */
3135 static unsigned decl_die_table_allocated;
3137 /* Number of elements in decl_die_table currently in use. */
3138 static unsigned decl_die_table_in_use;
3140 /* Size (in elements) of increments by which we may expand the
3142 #define DECL_DIE_TABLE_INCREMENT 256
3144 /* A pointer to the base of a table of references to declaration
3145 scopes. This table is a display which tracks the nesting
3146 of declaration scopes at the current scope and containing
3147 scopes. This table is used to find the proper place to
3148 define type declaration DIE's. */
3149 static tree *decl_scope_table;
3151 /* Number of elements currently allocated for the decl_scope_table. */
3152 static int decl_scope_table_allocated;
3154 /* Current level of nesting of declaration scopes. */
3155 static int decl_scope_depth;
3157 /* Size (in elements) of increments by which we may expand the
3158 decl_scope_table. */
3159 #define DECL_SCOPE_TABLE_INCREMENT 64
3161 /* A pointer to the base of a list of references to DIE's that
3162 are uniquely identified by their tag, presence/absence of
3163 children DIE's, and list of attribute/value pairs. */
3164 static dw_die_ref *abbrev_die_table;
3166 /* Number of elements currently allocated for abbrev_die_table. */
3167 static unsigned abbrev_die_table_allocated;
3169 /* Number of elements in type_die_table currently in use. */
3170 static unsigned abbrev_die_table_in_use;
3172 /* Size (in elements) of increments by which we may expand the
3173 abbrev_die_table. */
3174 #define ABBREV_DIE_TABLE_INCREMENT 256
3176 /* A pointer to the base of a table that contains line information
3177 for each source code line in .text in the compilation unit. */
3178 static dw_line_info_ref line_info_table;
3180 /* Number of elements currently allocated for line_info_table. */
3181 static unsigned line_info_table_allocated;
3183 /* Number of elements in separate_line_info_table currently in use. */
3184 static unsigned separate_line_info_table_in_use;
3186 /* A pointer to the base of a table that contains line information
3187 for each source code line outside of .text in the compilation unit. */
3188 static dw_separate_line_info_ref separate_line_info_table;
3190 /* Number of elements currently allocated for separate_line_info_table. */
3191 static unsigned separate_line_info_table_allocated;
3193 /* Number of elements in line_info_table currently in use. */
3194 static unsigned line_info_table_in_use;
3196 /* Size (in elements) of increments by which we may expand the
3198 #define LINE_INFO_TABLE_INCREMENT 1024
3200 /* A pointer to the base of a table that contains a list of publicly
3201 accessible names. */
3202 static pubname_ref pubname_table;
3204 /* Number of elements currently allocated for pubname_table. */
3205 static unsigned pubname_table_allocated;
3207 /* Number of elements in pubname_table currently in use. */
3208 static unsigned pubname_table_in_use;
3210 /* Size (in elements) of increments by which we may expand the
3212 #define PUBNAME_TABLE_INCREMENT 64
3214 /* A pointer to the base of a table that contains a list of publicly
3215 accessible names. */
3216 static arange_ref arange_table;
3218 /* Number of elements currently allocated for arange_table. */
3219 static unsigned arange_table_allocated;
3221 /* Number of elements in arange_table currently in use. */
3222 static unsigned arange_table_in_use;
3224 /* Size (in elements) of increments by which we may expand the
3226 #define ARANGE_TABLE_INCREMENT 64
3228 /* A pointer to the base of a list of incomplete types which might be
3229 completed at some later time. */
3231 static tree *incomplete_types_list;
3233 /* Number of elements currently allocated for the incomplete_types_list. */
3234 static unsigned incomplete_types_allocated;
3236 /* Number of elements of incomplete_types_list currently in use. */
3237 static unsigned incomplete_types;
3239 /* Size (in elements) of increments by which we may expand the incomplete
3240 types list. Actually, a single hunk of space of this size should
3241 be enough for most typical programs. */
3242 #define INCOMPLETE_TYPES_INCREMENT 64
3244 /* Record whether the function being analyzed contains inlined functions. */
3245 static int current_function_has_inlines;
3246 #if 0 && defined (MIPS_DEBUGGING_INFO)
3247 static int comp_unit_has_inlines;
3250 /* Array of RTXes referenced by the debugging information, which therefore
3251 must be kept around forever. We do this rather than perform GC on
3252 the dwarf info because almost all of the dwarf info lives forever, and
3253 it's easier to support non-GC frontends this way. */
3254 static varray_type used_rtx_varray;
3256 /* Forward declarations for functions defined in this file. */
3258 static int is_pseudo_reg PARAMS ((rtx));
3259 static tree type_main_variant PARAMS ((tree));
3260 static int is_tagged_type PARAMS ((tree));
3261 static const char *dwarf_tag_name PARAMS ((unsigned));
3262 static const char *dwarf_attr_name PARAMS ((unsigned));
3263 static const char *dwarf_form_name PARAMS ((unsigned));
3265 static const char *dwarf_type_encoding_name PARAMS ((unsigned));
3267 static tree decl_ultimate_origin PARAMS ((tree));
3268 static tree block_ultimate_origin PARAMS ((tree));
3269 static tree decl_class_context PARAMS ((tree));
3270 static void add_dwarf_attr PARAMS ((dw_die_ref, dw_attr_ref));
3271 static void add_AT_flag PARAMS ((dw_die_ref,
3272 enum dwarf_attribute,
3274 static void add_AT_int PARAMS ((dw_die_ref,
3275 enum dwarf_attribute, long));
3276 static void add_AT_unsigned PARAMS ((dw_die_ref,
3277 enum dwarf_attribute,
3279 static void add_AT_long_long PARAMS ((dw_die_ref,
3280 enum dwarf_attribute,
3283 static void add_AT_float PARAMS ((dw_die_ref,
3284 enum dwarf_attribute,
3286 static void add_AT_string PARAMS ((dw_die_ref,
3287 enum dwarf_attribute,
3289 static void add_AT_die_ref PARAMS ((dw_die_ref,
3290 enum dwarf_attribute,
3292 static void add_AT_fde_ref PARAMS ((dw_die_ref,
3293 enum dwarf_attribute,
3295 static void add_AT_loc PARAMS ((dw_die_ref,
3296 enum dwarf_attribute,
3298 static void add_AT_addr PARAMS ((dw_die_ref,
3299 enum dwarf_attribute,
3301 static void add_AT_lbl_id PARAMS ((dw_die_ref,
3302 enum dwarf_attribute,
3304 static void add_AT_lbl_offset PARAMS ((dw_die_ref,
3305 enum dwarf_attribute,
3307 static dw_attr_ref get_AT PARAMS ((dw_die_ref,
3308 enum dwarf_attribute));
3309 static const char *get_AT_low_pc PARAMS ((dw_die_ref));
3310 static const char *get_AT_hi_pc PARAMS ((dw_die_ref));
3311 static const char *get_AT_string PARAMS ((dw_die_ref,
3312 enum dwarf_attribute));
3313 static int get_AT_flag PARAMS ((dw_die_ref,
3314 enum dwarf_attribute));
3315 static unsigned get_AT_unsigned PARAMS ((dw_die_ref,
3316 enum dwarf_attribute));
3317 static inline dw_die_ref get_AT_ref PARAMS ((dw_die_ref,
3318 enum dwarf_attribute));
3319 static int is_c_family PARAMS ((void));
3320 static int is_fortran PARAMS ((void));
3321 static void remove_AT PARAMS ((dw_die_ref,
3322 enum dwarf_attribute));
3323 static void remove_children PARAMS ((dw_die_ref));
3324 static void add_child_die PARAMS ((dw_die_ref, dw_die_ref));
3325 static dw_die_ref new_die PARAMS ((enum dwarf_tag, dw_die_ref));
3326 static dw_die_ref lookup_type_die PARAMS ((tree));
3327 static void equate_type_number_to_die PARAMS ((tree, dw_die_ref));
3328 static dw_die_ref lookup_decl_die PARAMS ((tree));
3329 static void equate_decl_number_to_die PARAMS ((tree, dw_die_ref));
3330 static void print_spaces PARAMS ((FILE *));
3331 static void print_die PARAMS ((dw_die_ref, FILE *));
3332 static void print_dwarf_line_table PARAMS ((FILE *));
3333 static void add_sibling_attributes PARAMS ((dw_die_ref));
3334 static void build_abbrev_table PARAMS ((dw_die_ref));
3335 static unsigned long size_of_string PARAMS ((const char *));
3336 static int constant_size PARAMS ((long unsigned));
3337 static unsigned long size_of_die PARAMS ((dw_die_ref));
3338 static void calc_die_sizes PARAMS ((dw_die_ref));
3339 static unsigned long size_of_line_prolog PARAMS ((void));
3340 static unsigned long size_of_pubnames PARAMS ((void));
3341 static unsigned long size_of_aranges PARAMS ((void));
3342 static enum dwarf_form value_format PARAMS ((dw_attr_ref));
3343 static void output_value_format PARAMS ((dw_attr_ref));
3344 static void output_abbrev_section PARAMS ((void));
3345 static void output_die PARAMS ((dw_die_ref));
3346 static void output_compilation_unit_header PARAMS ((void));
3347 static const char *dwarf2_name PARAMS ((tree, int));
3348 static void add_pubname PARAMS ((tree, dw_die_ref));
3349 static void output_pubnames PARAMS ((void));
3350 static void add_arange PARAMS ((tree, dw_die_ref));
3351 static void output_aranges PARAMS ((void));
3352 static void output_line_info PARAMS ((void));
3353 static dw_die_ref base_type_die PARAMS ((tree));
3354 static tree root_type PARAMS ((tree));
3355 static int is_base_type PARAMS ((tree));
3356 static dw_die_ref modified_type_die PARAMS ((tree, int, int, dw_die_ref));
3357 static int type_is_enum PARAMS ((tree));
3358 static unsigned int reg_number PARAMS ((rtx));
3359 static dw_loc_descr_ref reg_loc_descriptor PARAMS ((rtx));
3360 static dw_loc_descr_ref based_loc_descr PARAMS ((unsigned, long));
3361 static int is_based_loc PARAMS ((rtx));
3362 static dw_loc_descr_ref mem_loc_descriptor PARAMS ((rtx, enum machine_mode mode));
3363 static dw_loc_descr_ref concat_loc_descriptor PARAMS ((rtx, rtx));
3364 static dw_loc_descr_ref loc_descriptor PARAMS ((rtx));
3365 static HOST_WIDE_INT ceiling PARAMS ((HOST_WIDE_INT, unsigned int));
3366 static tree field_type PARAMS ((tree));
3367 static unsigned int simple_type_align_in_bits PARAMS ((tree));
3368 static unsigned HOST_WIDE_INT simple_type_size_in_bits PARAMS ((tree));
3369 static HOST_WIDE_INT field_byte_offset PARAMS ((tree));
3370 static void add_AT_location_description PARAMS ((dw_die_ref,
3371 enum dwarf_attribute, rtx));
3372 static void add_data_member_location_attribute PARAMS ((dw_die_ref, tree));
3373 static void add_const_value_attribute PARAMS ((dw_die_ref, rtx));
3374 static void add_location_or_const_value_attribute PARAMS ((dw_die_ref, tree));
3375 static void add_name_attribute PARAMS ((dw_die_ref, const char *));
3376 static void add_bound_info PARAMS ((dw_die_ref,
3377 enum dwarf_attribute, tree));
3378 static void add_subscript_info PARAMS ((dw_die_ref, tree));
3379 static void add_byte_size_attribute PARAMS ((dw_die_ref, tree));
3380 static void add_bit_offset_attribute PARAMS ((dw_die_ref, tree));
3381 static void add_bit_size_attribute PARAMS ((dw_die_ref, tree));
3382 static void add_prototyped_attribute PARAMS ((dw_die_ref, tree));
3383 static void add_abstract_origin_attribute PARAMS ((dw_die_ref, tree));
3384 static void add_pure_or_virtual_attribute PARAMS ((dw_die_ref, tree));
3385 static void add_src_coords_attributes PARAMS ((dw_die_ref, tree));
3386 static void add_name_and_src_coords_attributes PARAMS ((dw_die_ref, tree));
3387 static void push_decl_scope PARAMS ((tree));
3388 static dw_die_ref scope_die_for PARAMS ((tree, dw_die_ref));
3389 static void pop_decl_scope PARAMS ((void));
3390 static void add_type_attribute PARAMS ((dw_die_ref, tree, int, int,
3392 static const char *type_tag PARAMS ((tree));
3393 static tree member_declared_type PARAMS ((tree));
3395 static const char *decl_start_label PARAMS ((tree));
3397 static void gen_array_type_die PARAMS ((tree, dw_die_ref));
3398 static void gen_set_type_die PARAMS ((tree, dw_die_ref));
3400 static void gen_entry_point_die PARAMS ((tree, dw_die_ref));
3402 static void gen_inlined_enumeration_type_die PARAMS ((tree, dw_die_ref));
3403 static void gen_inlined_structure_type_die PARAMS ((tree, dw_die_ref));
3404 static void gen_inlined_union_type_die PARAMS ((tree, dw_die_ref));
3405 static void gen_enumeration_type_die PARAMS ((tree, dw_die_ref));
3406 static dw_die_ref gen_formal_parameter_die PARAMS ((tree, dw_die_ref));
3407 static void gen_unspecified_parameters_die PARAMS ((tree, dw_die_ref));
3408 static void gen_formal_types_die PARAMS ((tree, dw_die_ref));
3409 static void gen_subprogram_die PARAMS ((tree, dw_die_ref));
3410 static void gen_variable_die PARAMS ((tree, dw_die_ref));
3411 static void gen_label_die PARAMS ((tree, dw_die_ref));
3412 static void gen_lexical_block_die PARAMS ((tree, dw_die_ref, int));
3413 static void gen_inlined_subroutine_die PARAMS ((tree, dw_die_ref, int));
3414 static void gen_field_die PARAMS ((tree, dw_die_ref));
3415 static void gen_ptr_to_mbr_type_die PARAMS ((tree, dw_die_ref));
3416 static dw_die_ref gen_compile_unit_die PARAMS ((const char *));
3417 static void gen_string_type_die PARAMS ((tree, dw_die_ref));
3418 static void gen_inheritance_die PARAMS ((tree, dw_die_ref));
3419 static void gen_member_die PARAMS ((tree, dw_die_ref));
3420 static void gen_struct_or_union_type_die PARAMS ((tree, dw_die_ref));
3421 static void gen_subroutine_type_die PARAMS ((tree, dw_die_ref));
3422 static void gen_typedef_die PARAMS ((tree, dw_die_ref));
3423 static void gen_type_die PARAMS ((tree, dw_die_ref));
3424 static void gen_tagged_type_instantiation_die PARAMS ((tree, dw_die_ref));
3425 static void gen_block_die PARAMS ((tree, dw_die_ref, int));
3426 static void decls_for_scope PARAMS ((tree, dw_die_ref, int));
3427 static int is_redundant_typedef PARAMS ((tree));
3428 static void gen_decl_die PARAMS ((tree, dw_die_ref));
3429 static unsigned lookup_filename PARAMS ((const char *));
3430 static void add_incomplete_type PARAMS ((tree));
3431 static void retry_incomplete_types PARAMS ((void));
3432 static void gen_type_die_for_member PARAMS ((tree, tree, dw_die_ref));
3433 static void gen_abstract_function PARAMS ((tree));
3434 static rtx save_rtx PARAMS ((rtx));
3435 static void splice_child_die PARAMS ((dw_die_ref, dw_die_ref));
3436 static void reverse_die_lists PARAMS ((dw_die_ref));
3438 /* Section names used to hold DWARF debugging information. */
3439 #ifndef DEBUG_INFO_SECTION
3440 #define DEBUG_INFO_SECTION ".debug_info"
3442 #ifndef ABBREV_SECTION
3443 #define ABBREV_SECTION ".debug_abbrev"
3445 #ifndef ARANGES_SECTION
3446 #define ARANGES_SECTION ".debug_aranges"
3448 #ifndef DW_MACINFO_SECTION
3449 #define DW_MACINFO_SECTION ".debug_macinfo"
3451 #ifndef DEBUG_LINE_SECTION
3452 #define DEBUG_LINE_SECTION ".debug_line"
3455 #define LOC_SECTION ".debug_loc"
3457 #ifndef PUBNAMES_SECTION
3458 #define PUBNAMES_SECTION ".debug_pubnames"
3461 #define STR_SECTION ".debug_str"
3464 /* Standard ELF section names for compiled code and data. */
3465 #ifndef TEXT_SECTION
3466 #define TEXT_SECTION ".text"
3468 #ifndef DATA_SECTION
3469 #define DATA_SECTION ".data"
3472 #define BSS_SECTION ".bss"
3475 /* Labels we insert at beginning sections we can reference instead of
3476 the section names themselves. */
3478 #ifndef TEXT_SECTION_LABEL
3479 #define TEXT_SECTION_LABEL "Ltext"
3481 #ifndef DEBUG_LINE_SECTION_LABEL
3482 #define DEBUG_LINE_SECTION_LABEL "Ldebug_line"
3484 #ifndef DEBUG_INFO_SECTION_LABEL
3485 #define DEBUG_INFO_SECTION_LABEL "Ldebug_info"
3487 #ifndef ABBREV_SECTION_LABEL
3488 #define ABBREV_SECTION_LABEL "Ldebug_abbrev"
3492 /* Definitions of defaults for formats and names of various special
3493 (artificial) labels which may be generated within this file (when the -g
3494 options is used and DWARF_DEBUGGING_INFO is in effect.
3495 If necessary, these may be overridden from within the tm.h file, but
3496 typically, overriding these defaults is unnecessary. */
3498 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3499 static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3500 static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3501 static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3502 static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3504 #ifndef TEXT_END_LABEL
3505 #define TEXT_END_LABEL "Letext"
3507 #ifndef DATA_END_LABEL
3508 #define DATA_END_LABEL "Ledata"
3510 #ifndef BSS_END_LABEL
3511 #define BSS_END_LABEL "Lebss"
3513 #ifndef INSN_LABEL_FMT
3514 #define INSN_LABEL_FMT "LI%u_"
3516 #ifndef BLOCK_BEGIN_LABEL
3517 #define BLOCK_BEGIN_LABEL "LBB"
3519 #ifndef BLOCK_END_LABEL
3520 #define BLOCK_END_LABEL "LBE"
3522 #ifndef BODY_BEGIN_LABEL
3523 #define BODY_BEGIN_LABEL "Lbb"
3525 #ifndef BODY_END_LABEL
3526 #define BODY_END_LABEL "Lbe"
3528 #ifndef LINE_CODE_LABEL
3529 #define LINE_CODE_LABEL "LM"
3531 #ifndef SEPARATE_LINE_CODE_LABEL
3532 #define SEPARATE_LINE_CODE_LABEL "LSM"
3535 /* We allow a language front-end to designate a function that is to be
3536 called to "demangle" any name before it it put into a DIE. */
3538 static const char *(*demangle_name_func) PARAMS ((const char *));
3541 dwarf2out_set_demangle_name_func (func)
3542 const char *(*func) PARAMS ((const char *));
3544 demangle_name_func = func;
3547 /* Return an rtx like ORIG which lives forever. If we're doing GC,
3548 that means adding it to used_rtx_varray. If not, that means making
3549 a copy on the permanent_obstack. */
3556 VARRAY_PUSH_RTX (used_rtx_varray, orig);
3559 push_obstacks_nochange ();
3560 end_temporary_allocation ();
3561 orig = copy_rtx (orig);
3568 /* Test if rtl node points to a pseudo register. */
3574 return ((GET_CODE (rtl) == REG && REGNO (rtl) >= FIRST_PSEUDO_REGISTER)
3575 || (GET_CODE (rtl) == SUBREG
3576 && REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER));
3579 /* Return a reference to a type, with its const and volatile qualifiers
3583 type_main_variant (type)
3586 type = TYPE_MAIN_VARIANT (type);
3588 /* There really should be only one main variant among any group of variants
3589 of a given type (and all of the MAIN_VARIANT values for all members of
3590 the group should point to that one type) but sometimes the C front-end
3591 messes this up for array types, so we work around that bug here. */
3593 if (TREE_CODE (type) == ARRAY_TYPE)
3594 while (type != TYPE_MAIN_VARIANT (type))
3595 type = TYPE_MAIN_VARIANT (type);
3600 /* Return non-zero if the given type node represents a tagged type. */
3603 is_tagged_type (type)
3606 register enum tree_code code = TREE_CODE (type);
3608 return (code == RECORD_TYPE || code == UNION_TYPE
3609 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
3612 /* Convert a DIE tag into its string name. */
3615 dwarf_tag_name (tag)
3616 register unsigned tag;
3620 case DW_TAG_padding:
3621 return "DW_TAG_padding";
3622 case DW_TAG_array_type:
3623 return "DW_TAG_array_type";
3624 case DW_TAG_class_type:
3625 return "DW_TAG_class_type";
3626 case DW_TAG_entry_point:
3627 return "DW_TAG_entry_point";
3628 case DW_TAG_enumeration_type:
3629 return "DW_TAG_enumeration_type";
3630 case DW_TAG_formal_parameter:
3631 return "DW_TAG_formal_parameter";
3632 case DW_TAG_imported_declaration:
3633 return "DW_TAG_imported_declaration";
3635 return "DW_TAG_label";
3636 case DW_TAG_lexical_block:
3637 return "DW_TAG_lexical_block";
3639 return "DW_TAG_member";
3640 case DW_TAG_pointer_type:
3641 return "DW_TAG_pointer_type";
3642 case DW_TAG_reference_type:
3643 return "DW_TAG_reference_type";
3644 case DW_TAG_compile_unit:
3645 return "DW_TAG_compile_unit";
3646 case DW_TAG_string_type:
3647 return "DW_TAG_string_type";
3648 case DW_TAG_structure_type:
3649 return "DW_TAG_structure_type";
3650 case DW_TAG_subroutine_type:
3651 return "DW_TAG_subroutine_type";
3652 case DW_TAG_typedef:
3653 return "DW_TAG_typedef";
3654 case DW_TAG_union_type:
3655 return "DW_TAG_union_type";
3656 case DW_TAG_unspecified_parameters:
3657 return "DW_TAG_unspecified_parameters";
3658 case DW_TAG_variant:
3659 return "DW_TAG_variant";
3660 case DW_TAG_common_block:
3661 return "DW_TAG_common_block";
3662 case DW_TAG_common_inclusion:
3663 return "DW_TAG_common_inclusion";
3664 case DW_TAG_inheritance:
3665 return "DW_TAG_inheritance";
3666 case DW_TAG_inlined_subroutine:
3667 return "DW_TAG_inlined_subroutine";
3669 return "DW_TAG_module";
3670 case DW_TAG_ptr_to_member_type:
3671 return "DW_TAG_ptr_to_member_type";
3672 case DW_TAG_set_type:
3673 return "DW_TAG_set_type";
3674 case DW_TAG_subrange_type:
3675 return "DW_TAG_subrange_type";
3676 case DW_TAG_with_stmt:
3677 return "DW_TAG_with_stmt";
3678 case DW_TAG_access_declaration:
3679 return "DW_TAG_access_declaration";
3680 case DW_TAG_base_type:
3681 return "DW_TAG_base_type";
3682 case DW_TAG_catch_block:
3683 return "DW_TAG_catch_block";
3684 case DW_TAG_const_type:
3685 return "DW_TAG_const_type";
3686 case DW_TAG_constant:
3687 return "DW_TAG_constant";
3688 case DW_TAG_enumerator:
3689 return "DW_TAG_enumerator";
3690 case DW_TAG_file_type:
3691 return "DW_TAG_file_type";
3693 return "DW_TAG_friend";
3694 case DW_TAG_namelist:
3695 return "DW_TAG_namelist";
3696 case DW_TAG_namelist_item:
3697 return "DW_TAG_namelist_item";
3698 case DW_TAG_packed_type:
3699 return "DW_TAG_packed_type";
3700 case DW_TAG_subprogram:
3701 return "DW_TAG_subprogram";
3702 case DW_TAG_template_type_param:
3703 return "DW_TAG_template_type_param";
3704 case DW_TAG_template_value_param:
3705 return "DW_TAG_template_value_param";
3706 case DW_TAG_thrown_type:
3707 return "DW_TAG_thrown_type";
3708 case DW_TAG_try_block:
3709 return "DW_TAG_try_block";
3710 case DW_TAG_variant_part:
3711 return "DW_TAG_variant_part";
3712 case DW_TAG_variable:
3713 return "DW_TAG_variable";
3714 case DW_TAG_volatile_type:
3715 return "DW_TAG_volatile_type";
3716 case DW_TAG_MIPS_loop:
3717 return "DW_TAG_MIPS_loop";
3718 case DW_TAG_format_label:
3719 return "DW_TAG_format_label";
3720 case DW_TAG_function_template:
3721 return "DW_TAG_function_template";
3722 case DW_TAG_class_template:
3723 return "DW_TAG_class_template";
3725 return "DW_TAG_<unknown>";
3729 /* Convert a DWARF attribute code into its string name. */
3732 dwarf_attr_name (attr)
3733 register unsigned attr;
3738 return "DW_AT_sibling";
3739 case DW_AT_location:
3740 return "DW_AT_location";
3742 return "DW_AT_name";
3743 case DW_AT_ordering:
3744 return "DW_AT_ordering";
3745 case DW_AT_subscr_data:
3746 return "DW_AT_subscr_data";
3747 case DW_AT_byte_size:
3748 return "DW_AT_byte_size";
3749 case DW_AT_bit_offset:
3750 return "DW_AT_bit_offset";
3751 case DW_AT_bit_size:
3752 return "DW_AT_bit_size";
3753 case DW_AT_element_list:
3754 return "DW_AT_element_list";
3755 case DW_AT_stmt_list:
3756 return "DW_AT_stmt_list";
3758 return "DW_AT_low_pc";
3760 return "DW_AT_high_pc";
3761 case DW_AT_language:
3762 return "DW_AT_language";
3764 return "DW_AT_member";
3766 return "DW_AT_discr";
3767 case DW_AT_discr_value:
3768 return "DW_AT_discr_value";
3769 case DW_AT_visibility:
3770 return "DW_AT_visibility";
3772 return "DW_AT_import";
3773 case DW_AT_string_length:
3774 return "DW_AT_string_length";
3775 case DW_AT_common_reference:
3776 return "DW_AT_common_reference";
3777 case DW_AT_comp_dir:
3778 return "DW_AT_comp_dir";
3779 case DW_AT_const_value:
3780 return "DW_AT_const_value";
3781 case DW_AT_containing_type:
3782 return "DW_AT_containing_type";
3783 case DW_AT_default_value:
3784 return "DW_AT_default_value";
3786 return "DW_AT_inline";
3787 case DW_AT_is_optional:
3788 return "DW_AT_is_optional";
3789 case DW_AT_lower_bound:
3790 return "DW_AT_lower_bound";
3791 case DW_AT_producer:
3792 return "DW_AT_producer";
3793 case DW_AT_prototyped:
3794 return "DW_AT_prototyped";
3795 case DW_AT_return_addr:
3796 return "DW_AT_return_addr";
3797 case DW_AT_start_scope:
3798 return "DW_AT_start_scope";
3799 case DW_AT_stride_size:
3800 return "DW_AT_stride_size";
3801 case DW_AT_upper_bound:
3802 return "DW_AT_upper_bound";
3803 case DW_AT_abstract_origin:
3804 return "DW_AT_abstract_origin";
3805 case DW_AT_accessibility:
3806 return "DW_AT_accessibility";
3807 case DW_AT_address_class:
3808 return "DW_AT_address_class";
3809 case DW_AT_artificial:
3810 return "DW_AT_artificial";
3811 case DW_AT_base_types:
3812 return "DW_AT_base_types";
3813 case DW_AT_calling_convention:
3814 return "DW_AT_calling_convention";
3816 return "DW_AT_count";
3817 case DW_AT_data_member_location:
3818 return "DW_AT_data_member_location";
3819 case DW_AT_decl_column:
3820 return "DW_AT_decl_column";
3821 case DW_AT_decl_file:
3822 return "DW_AT_decl_file";
3823 case DW_AT_decl_line:
3824 return "DW_AT_decl_line";
3825 case DW_AT_declaration:
3826 return "DW_AT_declaration";
3827 case DW_AT_discr_list:
3828 return "DW_AT_discr_list";
3829 case DW_AT_encoding:
3830 return "DW_AT_encoding";
3831 case DW_AT_external:
3832 return "DW_AT_external";
3833 case DW_AT_frame_base:
3834 return "DW_AT_frame_base";
3836 return "DW_AT_friend";
3837 case DW_AT_identifier_case:
3838 return "DW_AT_identifier_case";
3839 case DW_AT_macro_info:
3840 return "DW_AT_macro_info";
3841 case DW_AT_namelist_items:
3842 return "DW_AT_namelist_items";
3843 case DW_AT_priority:
3844 return "DW_AT_priority";
3846 return "DW_AT_segment";
3847 case DW_AT_specification:
3848 return "DW_AT_specification";
3849 case DW_AT_static_link:
3850 return "DW_AT_static_link";
3852 return "DW_AT_type";
3853 case DW_AT_use_location:
3854 return "DW_AT_use_location";
3855 case DW_AT_variable_parameter:
3856 return "DW_AT_variable_parameter";
3857 case DW_AT_virtuality:
3858 return "DW_AT_virtuality";
3859 case DW_AT_vtable_elem_location:
3860 return "DW_AT_vtable_elem_location";
3862 case DW_AT_MIPS_fde:
3863 return "DW_AT_MIPS_fde";
3864 case DW_AT_MIPS_loop_begin:
3865 return "DW_AT_MIPS_loop_begin";
3866 case DW_AT_MIPS_tail_loop_begin:
3867 return "DW_AT_MIPS_tail_loop_begin";
3868 case DW_AT_MIPS_epilog_begin:
3869 return "DW_AT_MIPS_epilog_begin";
3870 case DW_AT_MIPS_loop_unroll_factor:
3871 return "DW_AT_MIPS_loop_unroll_factor";
3872 case DW_AT_MIPS_software_pipeline_depth:
3873 return "DW_AT_MIPS_software_pipeline_depth";
3874 case DW_AT_MIPS_linkage_name:
3875 return "DW_AT_MIPS_linkage_name";
3876 case DW_AT_MIPS_stride:
3877 return "DW_AT_MIPS_stride";
3878 case DW_AT_MIPS_abstract_name:
3879 return "DW_AT_MIPS_abstract_name";
3880 case DW_AT_MIPS_clone_origin:
3881 return "DW_AT_MIPS_clone_origin";
3882 case DW_AT_MIPS_has_inlines:
3883 return "DW_AT_MIPS_has_inlines";
3885 case DW_AT_sf_names:
3886 return "DW_AT_sf_names";
3887 case DW_AT_src_info:
3888 return "DW_AT_src_info";
3889 case DW_AT_mac_info:
3890 return "DW_AT_mac_info";
3891 case DW_AT_src_coords:
3892 return "DW_AT_src_coords";
3893 case DW_AT_body_begin:
3894 return "DW_AT_body_begin";
3895 case DW_AT_body_end:
3896 return "DW_AT_body_end";
3898 return "DW_AT_<unknown>";
3902 /* Convert a DWARF value form code into its string name. */
3905 dwarf_form_name (form)
3906 register unsigned form;
3911 return "DW_FORM_addr";
3912 case DW_FORM_block2:
3913 return "DW_FORM_block2";
3914 case DW_FORM_block4:
3915 return "DW_FORM_block4";
3917 return "DW_FORM_data2";
3919 return "DW_FORM_data4";
3921 return "DW_FORM_data8";
3922 case DW_FORM_string:
3923 return "DW_FORM_string";
3925 return "DW_FORM_block";
3926 case DW_FORM_block1:
3927 return "DW_FORM_block1";
3929 return "DW_FORM_data1";
3931 return "DW_FORM_flag";
3933 return "DW_FORM_sdata";
3935 return "DW_FORM_strp";
3937 return "DW_FORM_udata";
3938 case DW_FORM_ref_addr:
3939 return "DW_FORM_ref_addr";
3941 return "DW_FORM_ref1";
3943 return "DW_FORM_ref2";
3945 return "DW_FORM_ref4";
3947 return "DW_FORM_ref8";
3948 case DW_FORM_ref_udata:
3949 return "DW_FORM_ref_udata";
3950 case DW_FORM_indirect:
3951 return "DW_FORM_indirect";
3953 return "DW_FORM_<unknown>";
3957 /* Convert a DWARF type code into its string name. */
3961 dwarf_type_encoding_name (enc)
3962 register unsigned enc;
3966 case DW_ATE_address:
3967 return "DW_ATE_address";
3968 case DW_ATE_boolean:
3969 return "DW_ATE_boolean";
3970 case DW_ATE_complex_float:
3971 return "DW_ATE_complex_float";
3973 return "DW_ATE_float";
3975 return "DW_ATE_signed";
3976 case DW_ATE_signed_char:
3977 return "DW_ATE_signed_char";
3978 case DW_ATE_unsigned:
3979 return "DW_ATE_unsigned";
3980 case DW_ATE_unsigned_char:
3981 return "DW_ATE_unsigned_char";
3983 return "DW_ATE_<unknown>";
3988 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3989 instance of an inlined instance of a decl which is local to an inline
3990 function, so we have to trace all of the way back through the origin chain
3991 to find out what sort of node actually served as the original seed for the
3995 decl_ultimate_origin (decl)
3998 /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the
3999 nodes in the function to point to themselves; ignore that if
4000 we're trying to output the abstract instance of this function. */
4001 if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl)
4004 #ifdef ENABLE_CHECKING
4005 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
4006 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
4007 most distant ancestor, this should never happen. */
4011 return DECL_ABSTRACT_ORIGIN (decl);
4014 /* Determine the "ultimate origin" of a block. The block may be an inlined
4015 instance of an inlined instance of a block which is local to an inline
4016 function, so we have to trace all of the way back through the origin chain
4017 to find out what sort of node actually served as the original seed for the
4021 block_ultimate_origin (block)
4022 register tree block;
4024 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
4026 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
4027 nodes in the function to point to themselves; ignore that if
4028 we're trying to output the abstract instance of this function. */
4029 if (BLOCK_ABSTRACT (block) && immediate_origin == block)
4032 if (immediate_origin == NULL_TREE)
4036 register tree ret_val;
4037 register tree lookahead = immediate_origin;
4041 ret_val = lookahead;
4042 lookahead = (TREE_CODE (ret_val) == BLOCK)
4043 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
4046 while (lookahead != NULL && lookahead != ret_val);
4052 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
4053 of a virtual function may refer to a base class, so we check the 'this'
4057 decl_class_context (decl)
4060 tree context = NULL_TREE;
4062 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
4063 context = DECL_CONTEXT (decl);
4065 context = TYPE_MAIN_VARIANT
4066 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
4068 if (context && !TYPE_P (context))
4069 context = NULL_TREE;
4074 /* Add an attribute/value pair to a DIE. We build the lists up in reverse
4075 addition order, and correct that in add_sibling_attributes. */
4078 add_dwarf_attr (die, attr)
4079 register dw_die_ref die;
4080 register dw_attr_ref attr;
4082 if (die != NULL && attr != NULL)
4084 attr->dw_attr_next = die->die_attr;
4085 die->die_attr = attr;
4089 static inline dw_val_class AT_class PARAMS ((dw_attr_ref));
4090 static inline dw_val_class
4094 return a->dw_attr_val.val_class;
4097 /* Add a flag value attribute to a DIE. */
4100 add_AT_flag (die, attr_kind, flag)
4101 register dw_die_ref die;
4102 register enum dwarf_attribute attr_kind;
4103 register unsigned flag;
4105 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4107 attr->dw_attr_next = NULL;
4108 attr->dw_attr = attr_kind;
4109 attr->dw_attr_val.val_class = dw_val_class_flag;
4110 attr->dw_attr_val.v.val_flag = flag;
4111 add_dwarf_attr (die, attr);
4114 static inline unsigned AT_flag PARAMS ((dw_attr_ref));
4115 static inline unsigned
4117 register dw_attr_ref a;
4119 if (a && AT_class (a) == dw_val_class_flag)
4120 return a->dw_attr_val.v.val_flag;
4125 /* Add a signed integer attribute value to a DIE. */
4128 add_AT_int (die, attr_kind, int_val)
4129 register dw_die_ref die;
4130 register enum dwarf_attribute attr_kind;
4131 register long int int_val;
4133 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4135 attr->dw_attr_next = NULL;
4136 attr->dw_attr = attr_kind;
4137 attr->dw_attr_val.val_class = dw_val_class_const;
4138 attr->dw_attr_val.v.val_int = int_val;
4139 add_dwarf_attr (die, attr);
4142 static inline long int AT_int PARAMS ((dw_attr_ref));
4143 static inline long int
4145 register dw_attr_ref a;
4147 if (a && AT_class (a) == dw_val_class_const)
4148 return a->dw_attr_val.v.val_int;
4153 /* Add an unsigned integer attribute value to a DIE. */
4156 add_AT_unsigned (die, attr_kind, unsigned_val)
4157 register dw_die_ref die;
4158 register enum dwarf_attribute attr_kind;
4159 register unsigned long unsigned_val;
4161 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4163 attr->dw_attr_next = NULL;
4164 attr->dw_attr = attr_kind;
4165 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
4166 attr->dw_attr_val.v.val_unsigned = unsigned_val;
4167 add_dwarf_attr (die, attr);
4170 static inline unsigned long AT_unsigned PARAMS ((dw_attr_ref));
4171 static inline unsigned long
4173 register dw_attr_ref a;
4175 if (a && AT_class (a) == dw_val_class_unsigned_const)
4176 return a->dw_attr_val.v.val_unsigned;
4181 /* Add an unsigned double integer attribute value to a DIE. */
4184 add_AT_long_long (die, attr_kind, val_hi, val_low)
4185 register dw_die_ref die;
4186 register enum dwarf_attribute attr_kind;
4187 register unsigned long val_hi;
4188 register unsigned long val_low;
4190 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4192 attr->dw_attr_next = NULL;
4193 attr->dw_attr = attr_kind;
4194 attr->dw_attr_val.val_class = dw_val_class_long_long;
4195 attr->dw_attr_val.v.val_long_long.hi = val_hi;
4196 attr->dw_attr_val.v.val_long_long.low = val_low;
4197 add_dwarf_attr (die, attr);
4200 /* Add a floating point attribute value to a DIE and return it. */
4203 add_AT_float (die, attr_kind, length, array)
4204 register dw_die_ref die;
4205 register enum dwarf_attribute attr_kind;
4206 register unsigned length;
4207 register long *array;
4209 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4211 attr->dw_attr_next = NULL;
4212 attr->dw_attr = attr_kind;
4213 attr->dw_attr_val.val_class = dw_val_class_float;
4214 attr->dw_attr_val.v.val_float.length = length;
4215 attr->dw_attr_val.v.val_float.array = array;
4216 add_dwarf_attr (die, attr);
4219 /* Add a string attribute value to a DIE. */
4222 add_AT_string (die, attr_kind, str)
4223 register dw_die_ref die;
4224 register enum dwarf_attribute attr_kind;
4225 register const char *str;
4227 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4229 attr->dw_attr_next = NULL;
4230 attr->dw_attr = attr_kind;
4231 attr->dw_attr_val.val_class = dw_val_class_str;
4232 attr->dw_attr_val.v.val_str = xstrdup (str);
4233 add_dwarf_attr (die, attr);
4236 static inline const char *AT_string PARAMS ((dw_attr_ref));
4237 static inline const char *
4239 register dw_attr_ref a;
4241 if (a && AT_class (a) == dw_val_class_str)
4242 return a->dw_attr_val.v.val_str;
4247 /* Add a DIE reference attribute value to a DIE. */
4250 add_AT_die_ref (die, attr_kind, targ_die)
4251 register dw_die_ref die;
4252 register enum dwarf_attribute attr_kind;
4253 register dw_die_ref targ_die;
4255 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4257 attr->dw_attr_next = NULL;
4258 attr->dw_attr = attr_kind;
4259 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4260 attr->dw_attr_val.v.val_die_ref = targ_die;
4261 add_dwarf_attr (die, attr);
4264 static inline dw_die_ref AT_ref PARAMS ((dw_attr_ref));
4265 static inline dw_die_ref
4267 register dw_attr_ref a;
4269 if (a && AT_class (a) == dw_val_class_die_ref)
4270 return a->dw_attr_val.v.val_die_ref;
4275 /* Add an FDE reference attribute value to a DIE. */
4278 add_AT_fde_ref (die, attr_kind, targ_fde)
4279 register dw_die_ref die;
4280 register enum dwarf_attribute attr_kind;
4281 register unsigned targ_fde;
4283 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4285 attr->dw_attr_next = NULL;
4286 attr->dw_attr = attr_kind;
4287 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
4288 attr->dw_attr_val.v.val_fde_index = targ_fde;
4289 add_dwarf_attr (die, attr);
4292 /* Add a location description attribute value to a DIE. */
4295 add_AT_loc (die, attr_kind, loc)
4296 register dw_die_ref die;
4297 register enum dwarf_attribute attr_kind;
4298 register dw_loc_descr_ref loc;
4300 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4302 attr->dw_attr_next = NULL;
4303 attr->dw_attr = attr_kind;
4304 attr->dw_attr_val.val_class = dw_val_class_loc;
4305 attr->dw_attr_val.v.val_loc = loc;
4306 add_dwarf_attr (die, attr);
4309 static inline dw_loc_descr_ref AT_loc PARAMS ((dw_attr_ref));
4310 static inline dw_loc_descr_ref
4312 register dw_attr_ref a;
4314 if (a && AT_class (a) == dw_val_class_loc)
4315 return a->dw_attr_val.v.val_loc;
4320 /* Add an address constant attribute value to a DIE. */
4323 add_AT_addr (die, attr_kind, addr)
4324 register dw_die_ref die;
4325 register enum dwarf_attribute attr_kind;
4328 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4330 attr->dw_attr_next = NULL;
4331 attr->dw_attr = attr_kind;
4332 attr->dw_attr_val.val_class = dw_val_class_addr;
4333 attr->dw_attr_val.v.val_addr = addr;
4334 add_dwarf_attr (die, attr);
4337 static inline rtx AT_addr PARAMS ((dw_attr_ref));
4340 register dw_attr_ref a;
4342 if (a && AT_class (a) == dw_val_class_addr)
4343 return a->dw_attr_val.v.val_addr;
4348 /* Add a label identifier attribute value to a DIE. */
4351 add_AT_lbl_id (die, attr_kind, lbl_id)
4352 register dw_die_ref die;
4353 register enum dwarf_attribute attr_kind;
4354 register const char *lbl_id;
4356 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4358 attr->dw_attr_next = NULL;
4359 attr->dw_attr = attr_kind;
4360 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
4361 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
4362 add_dwarf_attr (die, attr);
4365 /* Add a section offset attribute value to a DIE. */
4368 add_AT_lbl_offset (die, attr_kind, label)
4369 register dw_die_ref die;
4370 register enum dwarf_attribute attr_kind;
4371 register const char *label;
4373 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4375 attr->dw_attr_next = NULL;
4376 attr->dw_attr = attr_kind;
4377 attr->dw_attr_val.val_class = dw_val_class_lbl_offset;
4378 attr->dw_attr_val.v.val_lbl_id = xstrdup (label);
4379 add_dwarf_attr (die, attr);
4383 static inline const char *AT_lbl PARAMS ((dw_attr_ref));
4384 static inline const char *
4386 register dw_attr_ref a;
4388 if (a && (AT_class (a) == dw_val_class_lbl_id
4389 || AT_class (a) == dw_val_class_lbl_offset))
4390 return a->dw_attr_val.v.val_lbl_id;
4395 /* Get the attribute of type attr_kind. */
4397 static inline dw_attr_ref
4398 get_AT (die, attr_kind)
4399 register dw_die_ref die;
4400 register enum dwarf_attribute attr_kind;
4402 register dw_attr_ref a;
4403 register dw_die_ref spec = NULL;
4407 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4409 if (a->dw_attr == attr_kind)
4412 if (a->dw_attr == DW_AT_specification
4413 || a->dw_attr == DW_AT_abstract_origin)
4418 return get_AT (spec, attr_kind);
4424 /* Return the "low pc" attribute value, typically associated with
4425 a subprogram DIE. Return null if the "low pc" attribute is
4426 either not prsent, or if it cannot be represented as an
4427 assembler label identifier. */
4429 static inline const char *
4431 register dw_die_ref die;
4433 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
4437 /* Return the "high pc" attribute value, typically associated with
4438 a subprogram DIE. Return null if the "high pc" attribute is
4439 either not prsent, or if it cannot be represented as an
4440 assembler label identifier. */
4442 static inline const char *
4444 register dw_die_ref die;
4446 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
4450 /* Return the value of the string attribute designated by ATTR_KIND, or
4451 NULL if it is not present. */
4453 static inline const char *
4454 get_AT_string (die, attr_kind)
4455 register dw_die_ref die;
4456 register enum dwarf_attribute attr_kind;
4458 register dw_attr_ref a = get_AT (die, attr_kind);
4459 return AT_string (a);
4462 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
4463 if it is not present. */
4466 get_AT_flag (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);
4474 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
4475 if it is not present. */
4477 static inline unsigned
4478 get_AT_unsigned (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);
4483 return AT_unsigned (a);
4486 static inline dw_die_ref
4487 get_AT_ref (die, attr_kind)
4489 register enum dwarf_attribute attr_kind;
4491 register dw_attr_ref a = get_AT (die, attr_kind);
4498 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4500 return (lang == DW_LANG_C || lang == DW_LANG_C89
4501 || lang == DW_LANG_C_plus_plus);
4507 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4509 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
4512 /* Free up the memory used by A. */
4514 static inline void free_AT PARAMS ((dw_attr_ref));
4519 switch (AT_class (a))
4521 case dw_val_class_str:
4522 case dw_val_class_lbl_id:
4523 case dw_val_class_lbl_offset:
4524 free (a->dw_attr_val.v.val_str);
4534 /* Remove the specified attribute if present. */
4537 remove_AT (die, attr_kind)
4538 register dw_die_ref die;
4539 register enum dwarf_attribute attr_kind;
4541 register dw_attr_ref *p;
4542 register dw_attr_ref removed = NULL;
4546 for (p = &(die->die_attr); *p; p = &((*p)->dw_attr_next))
4547 if ((*p)->dw_attr == attr_kind)
4550 *p = (*p)->dw_attr_next;
4559 /* Free up the memory used by DIE. */
4561 static inline void free_die PARAMS ((dw_die_ref));
4566 remove_children (die);
4570 /* Discard the children of this DIE. */
4573 remove_children (die)
4574 register dw_die_ref die;
4576 register dw_die_ref child_die = die->die_child;
4578 die->die_child = NULL;
4580 while (child_die != NULL)
4582 register dw_die_ref tmp_die = child_die;
4583 register dw_attr_ref a;
4585 child_die = child_die->die_sib;
4587 for (a = tmp_die->die_attr; a != NULL; )
4589 register dw_attr_ref tmp_a = a;
4591 a = a->dw_attr_next;
4599 /* Add a child DIE below its parent. We build the lists up in reverse
4600 addition order, and correct that in add_sibling_attributes. */
4603 add_child_die (die, child_die)
4604 register dw_die_ref die;
4605 register dw_die_ref child_die;
4607 if (die != NULL && child_die != NULL)
4609 if (die == child_die)
4611 child_die->die_parent = die;
4612 child_die->die_sib = die->die_child;
4613 die->die_child = child_die;
4617 /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT
4618 is the specification, to the front of PARENT's list of children. */
4621 splice_child_die (parent, child)
4622 dw_die_ref parent, child;
4626 /* We want the declaration DIE from inside the class, not the
4627 specification DIE at toplevel. */
4628 if (child->die_parent != parent)
4630 dw_die_ref tmp = get_AT_ref (child, DW_AT_specification);
4635 if (child->die_parent != parent
4636 && child->die_parent != get_AT_ref (parent, DW_AT_specification))
4639 for (p = &(parent->die_child); *p; p = &((*p)->die_sib))
4642 *p = child->die_sib;
4646 child->die_sib = parent->die_child;
4647 parent->die_child = child;
4650 /* Return a pointer to a newly created DIE node. */
4652 static inline dw_die_ref
4653 new_die (tag_value, parent_die)
4654 register enum dwarf_tag tag_value;
4655 register dw_die_ref parent_die;
4657 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4659 die->die_tag = tag_value;
4660 die->die_abbrev = 0;
4661 die->die_offset = 0;
4662 die->die_child = NULL;
4663 die->die_parent = NULL;
4664 die->die_sib = NULL;
4665 die->die_attr = NULL;
4667 if (parent_die != NULL)
4668 add_child_die (parent_die, die);
4671 limbo_die_node *limbo_node;
4673 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4674 limbo_node->die = die;
4675 limbo_node->next = limbo_die_list;
4676 limbo_die_list = limbo_node;
4682 /* Return the DIE associated with the given type specifier. */
4684 static inline dw_die_ref
4685 lookup_type_die (type)
4688 if (TREE_CODE (type) == VECTOR_TYPE)
4689 type = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4690 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4693 /* Equate a DIE to a given type specifier. */
4696 equate_type_number_to_die (type, type_die)
4698 register dw_die_ref type_die;
4700 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4703 /* Return the DIE associated with a given declaration. */
4705 static inline dw_die_ref
4706 lookup_decl_die (decl)
4709 register unsigned decl_id = DECL_UID (decl);
4711 return (decl_id < decl_die_table_in_use
4712 ? decl_die_table[decl_id] : NULL);
4715 /* Equate a DIE to a particular declaration. */
4718 equate_decl_number_to_die (decl, decl_die)
4720 register dw_die_ref decl_die;
4722 register unsigned decl_id = DECL_UID (decl);
4723 register unsigned num_allocated;
4725 if (decl_id >= decl_die_table_allocated)
4728 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4729 / DECL_DIE_TABLE_INCREMENT)
4730 * DECL_DIE_TABLE_INCREMENT;
4733 = (dw_die_ref *) xrealloc (decl_die_table,
4734 sizeof (dw_die_ref) * num_allocated);
4736 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4737 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4738 decl_die_table_allocated = num_allocated;
4741 if (decl_id >= decl_die_table_in_use)
4742 decl_die_table_in_use = (decl_id + 1);
4744 decl_die_table[decl_id] = decl_die;
4747 /* Keep track of the number of spaces used to indent the
4748 output of the debugging routines that print the structure of
4749 the DIE internal representation. */
4750 static int print_indent;
4752 /* Indent the line the number of spaces given by print_indent. */
4755 print_spaces (outfile)
4758 fprintf (outfile, "%*s", print_indent, "");
4761 /* Print the information associated with a given DIE, and its children.
4762 This routine is a debugging aid only. */
4765 print_die (die, outfile)
4769 register dw_attr_ref a;
4770 register dw_die_ref c;
4772 print_spaces (outfile);
4773 fprintf (outfile, "DIE %4lu: %s\n",
4774 die->die_offset, dwarf_tag_name (die->die_tag));
4775 print_spaces (outfile);
4776 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4777 fprintf (outfile, " offset: %lu\n", die->die_offset);
4779 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4781 print_spaces (outfile);
4782 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4784 switch (AT_class (a))
4786 case dw_val_class_addr:
4787 fprintf (outfile, "address");
4789 case dw_val_class_loc:
4790 fprintf (outfile, "location descriptor");
4792 case dw_val_class_const:
4793 fprintf (outfile, "%ld", AT_int (a));
4795 case dw_val_class_unsigned_const:
4796 fprintf (outfile, "%lu", AT_unsigned (a));
4798 case dw_val_class_long_long:
4799 fprintf (outfile, "constant (%lu,%lu)",
4800 a->dw_attr_val.v.val_long_long.hi,
4801 a->dw_attr_val.v.val_long_long.low);
4803 case dw_val_class_float:
4804 fprintf (outfile, "floating-point constant");
4806 case dw_val_class_flag:
4807 fprintf (outfile, "%u", AT_flag (a));
4809 case dw_val_class_die_ref:
4810 if (AT_ref (a) != NULL)
4811 fprintf (outfile, "die -> %lu", AT_ref (a)->die_offset);
4813 fprintf (outfile, "die -> <null>");
4815 case dw_val_class_lbl_id:
4816 case dw_val_class_lbl_offset:
4817 fprintf (outfile, "label: %s", AT_lbl (a));
4819 case dw_val_class_str:
4820 if (AT_string (a) != NULL)
4821 fprintf (outfile, "\"%s\"", AT_string (a));
4823 fprintf (outfile, "<null>");
4829 fprintf (outfile, "\n");
4832 if (die->die_child != NULL)
4835 for (c = die->die_child; c != NULL; c = c->die_sib)
4836 print_die (c, outfile);
4842 /* Print the contents of the source code line number correspondence table.
4843 This routine is a debugging aid only. */
4846 print_dwarf_line_table (outfile)
4849 register unsigned i;
4850 register dw_line_info_ref line_info;
4852 fprintf (outfile, "\n\nDWARF source line information\n");
4853 for (i = 1; i < line_info_table_in_use; ++i)
4855 line_info = &line_info_table[i];
4856 fprintf (outfile, "%5d: ", i);
4857 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4858 fprintf (outfile, "%6ld", line_info->dw_line_num);
4859 fprintf (outfile, "\n");
4862 fprintf (outfile, "\n\n");
4865 /* Print the information collected for a given DIE. */
4868 debug_dwarf_die (die)
4871 print_die (die, stderr);
4874 /* Print all DWARF information collected for the compilation unit.
4875 This routine is a debugging aid only. */
4881 print_die (comp_unit_die, stderr);
4882 if (! DWARF2_ASM_LINE_DEBUG_INFO)
4883 print_dwarf_line_table (stderr);
4886 /* We build up the lists of children and attributes by pushing new ones
4887 onto the beginning of the list. Reverse the lists for DIE so that
4888 they are in order of addition. */
4891 reverse_die_lists (die)
4892 register dw_die_ref die;
4894 register dw_die_ref c, cp, cn;
4895 register dw_attr_ref a, ap, an;
4897 for (a = die->die_attr, ap = 0; a; a = an)
4899 an = a->dw_attr_next;
4900 a->dw_attr_next = ap;
4905 for (c = die->die_child, cp = 0; c; c = cn)
4911 die->die_child = cp;
4914 /* Traverse the DIE, reverse its lists of attributes and children, and
4915 add a sibling attribute if it may have the effect of speeding up
4916 access to siblings. To save some space, avoid generating sibling
4917 attributes for DIE's without children. */
4920 add_sibling_attributes (die)
4921 register dw_die_ref die;
4923 register dw_die_ref c;
4925 reverse_die_lists (die);
4927 if (die != comp_unit_die && die->die_sib && die->die_child != NULL)
4928 /* Add the sibling link to the front of the attribute list. */
4929 add_AT_die_ref (die, DW_AT_sibling, die->die_sib);
4931 for (c = die->die_child; c != NULL; c = c->die_sib)
4932 add_sibling_attributes (c);
4935 /* The format of each DIE (and its attribute value pairs)
4936 is encoded in an abbreviation table. This routine builds the
4937 abbreviation table and assigns a unique abbreviation id for
4938 each abbreviation entry. The children of each die are visited
4942 build_abbrev_table (die)
4943 register dw_die_ref die;
4945 register unsigned long abbrev_id;
4946 register unsigned long n_alloc;
4947 register dw_die_ref c;
4948 register dw_attr_ref d_attr, a_attr;
4949 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4951 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4953 if (abbrev->die_tag == die->die_tag)
4955 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4957 a_attr = abbrev->die_attr;
4958 d_attr = die->die_attr;
4960 while (a_attr != NULL && d_attr != NULL)
4962 if ((a_attr->dw_attr != d_attr->dw_attr)
4963 || (value_format (a_attr) != value_format (d_attr)))
4966 a_attr = a_attr->dw_attr_next;
4967 d_attr = d_attr->dw_attr_next;
4970 if (a_attr == NULL && d_attr == NULL)
4976 if (abbrev_id >= abbrev_die_table_in_use)
4978 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4980 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4982 = (dw_die_ref *) xrealloc (abbrev_die_table,
4983 sizeof (dw_die_ref) * n_alloc);
4985 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4986 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4987 abbrev_die_table_allocated = n_alloc;
4990 ++abbrev_die_table_in_use;
4991 abbrev_die_table[abbrev_id] = die;
4994 die->die_abbrev = abbrev_id;
4995 for (c = die->die_child; c != NULL; c = c->die_sib)
4996 build_abbrev_table (c);
4999 /* Return the size of a string, including the null byte.
5001 This used to treat backslashes as escapes, and hence they were not included
5002 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
5003 which treats a backslash as a backslash, escaping it if necessary, and hence
5004 we must include them in the count. */
5006 static unsigned long
5007 size_of_string (str)
5008 register const char *str;
5010 return strlen (str) + 1;
5013 /* Return the power-of-two number of bytes necessary to represent VALUE. */
5016 constant_size (value)
5017 long unsigned value;
5024 log = floor_log2 (value);
5027 log = 1 << (floor_log2 (log) + 1);
5032 /* Return the size of a DIE, as it is represented in the
5033 .debug_info section. */
5035 static unsigned long
5037 register dw_die_ref die;
5039 register unsigned long size = 0;
5040 register dw_attr_ref a;
5042 size += size_of_uleb128 (die->die_abbrev);
5043 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5045 switch (AT_class (a))
5047 case dw_val_class_addr:
5048 size += DWARF2_ADDR_SIZE;
5050 case dw_val_class_loc:
5052 register unsigned long lsize = size_of_locs (AT_loc (a));
5055 size += constant_size (lsize);
5059 case dw_val_class_const:
5060 size += size_of_sleb128 (AT_int (a));
5062 case dw_val_class_unsigned_const:
5063 size += constant_size (AT_unsigned (a));
5065 case dw_val_class_long_long:
5066 size += 1 + 8; /* block */
5068 case dw_val_class_float:
5069 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
5071 case dw_val_class_flag:
5074 case dw_val_class_die_ref:
5075 size += DWARF_OFFSET_SIZE;
5077 case dw_val_class_fde_ref:
5078 size += DWARF_OFFSET_SIZE;
5080 case dw_val_class_lbl_id:
5081 size += DWARF2_ADDR_SIZE;
5083 case dw_val_class_lbl_offset:
5084 size += DWARF_OFFSET_SIZE;
5086 case dw_val_class_str:
5087 size += size_of_string (AT_string (a));
5097 /* Size the debugging information associated with a given DIE.
5098 Visits the DIE's children recursively. Updates the global
5099 variable next_die_offset, on each time through. Uses the
5100 current value of next_die_offset to update the die_offset
5101 field in each DIE. */
5104 calc_die_sizes (die)
5107 register dw_die_ref c;
5108 die->die_offset = next_die_offset;
5109 next_die_offset += size_of_die (die);
5111 for (c = die->die_child; c != NULL; c = c->die_sib)
5114 if (die->die_child != NULL)
5115 /* Count the null byte used to terminate sibling lists. */
5116 next_die_offset += 1;
5119 /* Return the size of the line information prolog generated for the
5120 compilation unit. */
5122 static unsigned long
5123 size_of_line_prolog ()
5125 register unsigned long size;
5126 register unsigned long ft_index;
5128 size = DWARF_LINE_PROLOG_HEADER_SIZE;
5130 /* Count the size of the table giving number of args for each
5132 size += DWARF_LINE_OPCODE_BASE - 1;
5134 /* Include directory table is empty (at present). Count only the
5135 null byte used to terminate the table. */
5138 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5140 /* File name entry. */
5141 size += size_of_string (file_table[ft_index]);
5143 /* Include directory index. */
5144 size += size_of_uleb128 (0);
5146 /* Modification time. */
5147 size += size_of_uleb128 (0);
5149 /* File length in bytes. */
5150 size += size_of_uleb128 (0);
5153 /* Count the file table terminator. */
5158 /* Return the size of the .debug_pubnames table generated for the
5159 compilation unit. */
5161 static unsigned long
5164 register unsigned long size;
5165 register unsigned i;
5167 size = DWARF_PUBNAMES_HEADER_SIZE;
5168 for (i = 0; i < pubname_table_in_use; ++i)
5170 register pubname_ref p = &pubname_table[i];
5171 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
5174 size += DWARF_OFFSET_SIZE;
5178 /* Return the size of the information in the .debug_aranges section. */
5180 static unsigned long
5183 register unsigned long size;
5185 size = DWARF_ARANGES_HEADER_SIZE;
5187 /* Count the address/length pair for this compilation unit. */
5188 size += 2 * DWARF2_ADDR_SIZE;
5189 size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use;
5191 /* Count the two zero words used to terminated the address range table. */
5192 size += 2 * DWARF2_ADDR_SIZE;
5196 /* Select the encoding of an attribute value. */
5198 static enum dwarf_form
5202 switch (a->dw_attr_val.val_class)
5204 case dw_val_class_addr:
5205 return DW_FORM_addr;
5206 case dw_val_class_loc:
5207 switch (constant_size (size_of_locs (AT_loc (a))))
5210 return DW_FORM_block1;
5212 return DW_FORM_block2;
5216 case dw_val_class_const:
5217 return DW_FORM_sdata;
5218 case dw_val_class_unsigned_const:
5219 switch (constant_size (AT_unsigned (a)))
5222 return DW_FORM_data1;
5224 return DW_FORM_data2;
5226 return DW_FORM_data4;
5228 return DW_FORM_data8;
5232 case dw_val_class_long_long:
5233 return DW_FORM_block1;
5234 case dw_val_class_float:
5235 return DW_FORM_block1;
5236 case dw_val_class_flag:
5237 return DW_FORM_flag;
5238 case dw_val_class_die_ref:
5240 case dw_val_class_fde_ref:
5241 return DW_FORM_data;
5242 case dw_val_class_lbl_id:
5243 return DW_FORM_addr;
5244 case dw_val_class_lbl_offset:
5245 return DW_FORM_data;
5246 case dw_val_class_str:
5247 return DW_FORM_string;
5253 /* Output the encoding of an attribute value. */
5256 output_value_format (a)
5259 enum dwarf_form form = value_format (a);
5261 output_uleb128 (form);
5263 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
5265 fputc ('\n', asm_out_file);
5268 /* Output the .debug_abbrev section which defines the DIE abbreviation
5272 output_abbrev_section ()
5274 unsigned long abbrev_id;
5277 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5279 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5281 output_uleb128 (abbrev_id);
5283 fprintf (asm_out_file, " (abbrev code)");
5285 fputc ('\n', asm_out_file);
5286 output_uleb128 (abbrev->die_tag);
5288 fprintf (asm_out_file, " (TAG: %s)",
5289 dwarf_tag_name (abbrev->die_tag));
5291 fputc ('\n', asm_out_file);
5292 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5293 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5296 fprintf (asm_out_file, "\t%s %s",
5298 (abbrev->die_child != NULL
5299 ? "DW_children_yes" : "DW_children_no"));
5301 fputc ('\n', asm_out_file);
5303 for (a_attr = abbrev->die_attr; a_attr != NULL;
5304 a_attr = a_attr->dw_attr_next)
5306 output_uleb128 (a_attr->dw_attr);
5308 fprintf (asm_out_file, " (%s)",
5309 dwarf_attr_name (a_attr->dw_attr));
5311 fputc ('\n', asm_out_file);
5312 output_value_format (a_attr);
5315 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5318 /* Terminate the table. */
5319 fprintf (asm_out_file, "\t%s\t0\n", ASM_BYTE_OP);
5322 /* Output the DIE and its attributes. Called recursively to generate
5323 the definitions of each child DIE. */
5327 register dw_die_ref die;
5329 register dw_attr_ref a;
5330 register dw_die_ref c;
5331 register unsigned long size;
5333 output_uleb128 (die->die_abbrev);
5335 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5336 die->die_offset, dwarf_tag_name (die->die_tag));
5338 fputc ('\n', asm_out_file);
5340 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5342 switch (AT_class (a))
5344 case dw_val_class_addr:
5345 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, AT_addr (a));
5348 case dw_val_class_loc:
5349 size = size_of_locs (AT_loc (a));
5351 /* Output the block length for this list of location operations. */
5352 switch (constant_size (size))
5355 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5358 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5365 fprintf (asm_out_file, "\t%s %s",
5366 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5368 fputc ('\n', asm_out_file);
5370 output_loc_sequence (AT_loc (a));
5373 case dw_val_class_const:
5374 /* ??? It would be slightly more efficient to use a scheme like is
5375 used for unsigned constants below, but gdb 4.x does not sign
5376 extend. Gdb 5.x does sign extend. */
5377 output_sleb128 (AT_int (a));
5380 case dw_val_class_unsigned_const:
5381 switch (constant_size (AT_unsigned (a)))
5384 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, AT_unsigned (a));
5387 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, AT_unsigned (a));
5390 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, AT_unsigned (a));
5393 ASM_OUTPUT_DWARF_DATA8 (asm_out_file, AT_unsigned (a));
5400 case dw_val_class_long_long:
5401 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5403 fprintf (asm_out_file, "\t%s %s",
5404 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5406 fputc ('\n', asm_out_file);
5407 ASM_OUTPUT_DWARF_CONST_DOUBLE (asm_out_file,
5408 a->dw_attr_val.v.val_long_long.hi,
5409 a->dw_attr_val.v.val_long_long.low);
5412 fprintf (asm_out_file,
5413 "\t%s long long constant", ASM_COMMENT_START);
5415 fputc ('\n', asm_out_file);
5418 case dw_val_class_float:
5420 register unsigned int i;
5421 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5422 a->dw_attr_val.v.val_float.length * 4);
5424 fprintf (asm_out_file, "\t%s %s",
5425 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5427 fputc ('\n', asm_out_file);
5428 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5430 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5431 a->dw_attr_val.v.val_float.array[i]);
5433 fprintf (asm_out_file, "\t%s fp constant word %u",
5434 ASM_COMMENT_START, i);
5436 fputc ('\n', asm_out_file);
5441 case dw_val_class_flag:
5442 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, AT_flag (a));
5445 case dw_val_class_die_ref:
5446 ASM_OUTPUT_DWARF_DATA (asm_out_file, AT_ref (a)->die_offset);
5449 case dw_val_class_fde_ref:
5452 ASM_GENERATE_INTERNAL_LABEL
5453 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5454 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5455 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5459 case dw_val_class_lbl_id:
5460 ASM_OUTPUT_DWARF_ADDR (asm_out_file, AT_lbl (a));
5463 case dw_val_class_lbl_offset:
5464 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, AT_lbl (a));
5467 case dw_val_class_str:
5469 ASM_OUTPUT_DWARF_STRING (asm_out_file, AT_string (a));
5471 ASM_OUTPUT_ASCII (asm_out_file, AT_string (a),
5472 (int) strlen (AT_string (a)) + 1);
5479 if (AT_class (a) != dw_val_class_loc
5480 && AT_class (a) != dw_val_class_long_long
5481 && AT_class (a) != dw_val_class_float)
5484 fprintf (asm_out_file, "\t%s %s",
5485 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5487 fputc ('\n', asm_out_file);
5491 for (c = die->die_child; c != NULL; c = c->die_sib)
5494 if (die->die_child != NULL)
5496 /* Add null byte to terminate sibling list. */
5497 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5499 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5500 ASM_COMMENT_START, die->die_offset);
5502 fputc ('\n', asm_out_file);
5506 /* Output the compilation unit that appears at the beginning of the
5507 .debug_info section, and precedes the DIE descriptions. */
5510 output_compilation_unit_header ()
5512 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5514 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5517 fputc ('\n', asm_out_file);
5518 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5520 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5522 fputc ('\n', asm_out_file);
5523 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, abbrev_section_label);
5525 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5528 fputc ('\n', asm_out_file);
5529 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF2_ADDR_SIZE);
5531 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5533 fputc ('\n', asm_out_file);
5536 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5537 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5538 argument list, and maybe the scope. */
5541 dwarf2_name (decl, scope)
5545 return (*decl_printable_name) (decl, scope ? 1 : 0);
5548 /* Add a new entry to .debug_pubnames if appropriate. */
5551 add_pubname (decl, die)
5557 if (! TREE_PUBLIC (decl))
5560 if (pubname_table_in_use == pubname_table_allocated)
5562 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5563 pubname_table = (pubname_ref) xrealloc
5564 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5567 p = &pubname_table[pubname_table_in_use++];
5570 p->name = xstrdup (dwarf2_name (decl, 1));
5573 /* Output the public names table used to speed up access to externally
5574 visible names. For now, only generate entries for externally
5575 visible procedures. */
5580 register unsigned i;
5581 register unsigned long pubnames_length = size_of_pubnames ();
5583 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5586 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5589 fputc ('\n', asm_out_file);
5590 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5593 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5595 fputc ('\n', asm_out_file);
5596 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5598 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5601 fputc ('\n', asm_out_file);
5602 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5604 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5606 fputc ('\n', asm_out_file);
5607 for (i = 0; i < pubname_table_in_use; ++i)
5609 register pubname_ref pub = &pubname_table[i];
5611 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5613 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5615 fputc ('\n', asm_out_file);
5619 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5620 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5624 ASM_OUTPUT_ASCII (asm_out_file, pub->name,
5625 (int) strlen (pub->name) + 1);
5628 fputc ('\n', asm_out_file);
5631 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5632 fputc ('\n', asm_out_file);
5635 /* Add a new entry to .debug_aranges if appropriate. */
5638 add_arange (decl, die)
5642 if (! DECL_SECTION_NAME (decl))
5645 if (arange_table_in_use == arange_table_allocated)
5647 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5649 = (arange_ref) xrealloc (arange_table,
5650 arange_table_allocated * sizeof (dw_die_ref));
5653 arange_table[arange_table_in_use++] = die;
5656 /* Output the information that goes into the .debug_aranges table.
5657 Namely, define the beginning and ending address range of the
5658 text section generated for this compilation unit. */
5663 register unsigned i;
5664 register unsigned long aranges_length = size_of_aranges ();
5666 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5668 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5671 fputc ('\n', asm_out_file);
5672 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5674 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5676 fputc ('\n', asm_out_file);
5677 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5679 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5682 fputc ('\n', asm_out_file);
5683 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF2_ADDR_SIZE);
5685 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5687 fputc ('\n', asm_out_file);
5688 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5690 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5693 fputc ('\n', asm_out_file);
5695 /* We need to align to twice the pointer size here. */
5696 if (DWARF_ARANGES_PAD_SIZE)
5698 /* Pad using a 2 bytes word so that padding is correct
5699 for any pointer size. */
5700 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, 0);
5701 for (i = 2; i < DWARF_ARANGES_PAD_SIZE; i += 2)
5702 fprintf (asm_out_file, ",0");
5704 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5705 ASM_COMMENT_START, 2 * DWARF2_ADDR_SIZE);
5708 fputc ('\n', asm_out_file);
5709 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_section_label);
5711 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5713 fputc ('\n', asm_out_file);
5714 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5715 text_section_label);
5717 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5719 fputc ('\n', asm_out_file);
5720 for (i = 0; i < arange_table_in_use; ++i)
5722 dw_die_ref die = arange_table[i];
5724 if (die->die_tag == DW_TAG_subprogram)
5725 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (die));
5728 /* A static variable; extract the symbol from DW_AT_location.
5729 Note that this code isn't currently hit, as we only emit
5730 aranges for functions (jason 9/23/99). */
5732 dw_attr_ref a = get_AT (die, DW_AT_location);
5733 dw_loc_descr_ref loc;
5734 if (! a || AT_class (a) != dw_val_class_loc)
5738 if (loc->dw_loc_opc != DW_OP_addr)
5741 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5742 loc->dw_loc_oprnd1.v.val_addr);
5746 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5748 fputc ('\n', asm_out_file);
5749 if (die->die_tag == DW_TAG_subprogram)
5750 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (die),
5751 get_AT_low_pc (die));
5753 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5754 get_AT_unsigned (die, DW_AT_byte_size));
5757 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5759 fputc ('\n', asm_out_file);
5762 /* Output the terminator words. */
5763 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5764 fputc ('\n', asm_out_file);
5765 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5766 fputc ('\n', asm_out_file);
5769 /* Output the source line number correspondence information. This
5770 information goes into the .debug_line section. */
5775 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5776 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5777 register unsigned opc;
5778 register unsigned n_op_args;
5779 register unsigned long ft_index;
5780 register unsigned long lt_index;
5781 register unsigned long current_line;
5782 register long line_offset;
5783 register long line_delta;
5784 register unsigned long current_file;
5785 register unsigned long function;
5787 ASM_OUTPUT_DWARF_DELTA (asm_out_file, ".LTEND", ".LTSTART");
5789 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5792 fputc ('\n', asm_out_file);
5793 ASM_OUTPUT_LABEL (asm_out_file, ".LTSTART");
5794 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5796 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5798 fputc ('\n', asm_out_file);
5799 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5801 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5803 fputc ('\n', asm_out_file);
5804 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5806 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5809 fputc ('\n', asm_out_file);
5810 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5812 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5815 fputc ('\n', asm_out_file);
5816 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5818 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5821 fputc ('\n', asm_out_file);
5822 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5824 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5827 fputc ('\n', asm_out_file);
5828 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5830 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5832 fputc ('\n', asm_out_file);
5833 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5837 case DW_LNS_advance_pc:
5838 case DW_LNS_advance_line:
5839 case DW_LNS_set_file:
5840 case DW_LNS_set_column:
5841 case DW_LNS_fixed_advance_pc:
5848 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5850 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5851 ASM_COMMENT_START, opc, n_op_args);
5852 fputc ('\n', asm_out_file);
5856 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5858 /* Include directory table is empty, at present */
5859 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5860 fputc ('\n', asm_out_file);
5862 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5864 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5868 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5869 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5870 ASM_COMMENT_START, ft_index);
5874 ASM_OUTPUT_ASCII (asm_out_file,
5875 file_table[ft_index],
5876 (int) strlen (file_table[ft_index]) + 1);
5879 fputc ('\n', asm_out_file);
5881 /* Include directory index */
5883 fputc ('\n', asm_out_file);
5885 /* Modification time */
5887 fputc ('\n', asm_out_file);
5889 /* File length in bytes */
5891 fputc ('\n', asm_out_file);
5894 /* Terminate the file name table */
5895 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5896 fputc ('\n', asm_out_file);
5898 /* We used to set the address register to the first location in the text
5899 section here, but that didn't accomplish anything since we already
5900 have a line note for the opening brace of the first function. */
5902 /* Generate the line number to PC correspondence table, encoded as
5903 a series of state machine operations. */
5906 strcpy (prev_line_label, text_section_label);
5907 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5909 register dw_line_info_ref line_info = &line_info_table[lt_index];
5912 /* Disable this optimization for now; GDB wants to see two line notes
5913 at the beginning of a function so it can find the end of the
5916 /* Don't emit anything for redundant notes. Just updating the
5917 address doesn't accomplish anything, because we already assume
5918 that anything after the last address is this line. */
5919 if (line_info->dw_line_num == current_line
5920 && line_info->dw_file_num == current_file)
5924 /* Emit debug info for the address of the current line, choosing
5925 the encoding that uses the least amount of space. */
5926 /* ??? Unfortunately, we have little choice here currently, and must
5927 always use the most general form. Gcc does not know the address
5928 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5929 dwarf2 aware assemblers at this time, so we can't use any special
5930 pseudo ops that would allow the assembler to optimally encode this for
5931 us. Many ports do have length attributes which will give an upper
5932 bound on the address range. We could perhaps use length attributes
5933 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5934 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5937 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5938 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5940 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5943 fputc ('\n', asm_out_file);
5944 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5945 fputc ('\n', asm_out_file);
5949 /* This can handle any delta. This takes
5950 4+DWARF2_ADDR_SIZE bytes. */
5951 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5953 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5955 fputc ('\n', asm_out_file);
5956 output_uleb128 (1 + DWARF2_ADDR_SIZE);
5957 fputc ('\n', asm_out_file);
5958 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5959 fputc ('\n', asm_out_file);
5960 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5961 fputc ('\n', asm_out_file);
5963 strcpy (prev_line_label, line_label);
5965 /* Emit debug info for the source file of the current line, if
5966 different from the previous line. */
5967 if (line_info->dw_file_num != current_file)
5969 current_file = line_info->dw_file_num;
5970 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5972 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5974 fputc ('\n', asm_out_file);
5975 output_uleb128 (current_file);
5977 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5979 fputc ('\n', asm_out_file);
5982 /* Emit debug info for the current line number, choosing the encoding
5983 that uses the least amount of space. */
5984 if (line_info->dw_line_num != current_line)
5986 line_offset = line_info->dw_line_num - current_line;
5987 line_delta = line_offset - DWARF_LINE_BASE;
5988 current_line = line_info->dw_line_num;
5989 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5991 /* This can handle deltas from -10 to 234, using the current
5992 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5994 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5995 DWARF_LINE_OPCODE_BASE + line_delta);
5997 fprintf (asm_out_file,
5998 "\t%s line %ld", ASM_COMMENT_START, current_line);
6000 fputc ('\n', asm_out_file);
6004 /* This can handle any delta. This takes at least 4 bytes,
6005 depending on the value being encoded. */
6006 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6008 fprintf (asm_out_file, "\t%s advance to line %ld",
6009 ASM_COMMENT_START, current_line);
6011 fputc ('\n', asm_out_file);
6012 output_sleb128 (line_offset);
6013 fputc ('\n', asm_out_file);
6014 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6016 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6017 fputc ('\n', asm_out_file);
6022 /* We still need to start a new row, so output a copy insn. */
6023 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6025 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6026 fputc ('\n', asm_out_file);
6030 /* Emit debug info for the address of the end of the function. */
6033 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6035 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6038 fputc ('\n', asm_out_file);
6039 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
6040 fputc ('\n', asm_out_file);
6044 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6046 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
6047 fputc ('\n', asm_out_file);
6048 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6049 fputc ('\n', asm_out_file);
6050 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6051 fputc ('\n', asm_out_file);
6052 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
6053 fputc ('\n', asm_out_file);
6056 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6058 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
6060 fputc ('\n', asm_out_file);
6062 fputc ('\n', asm_out_file);
6063 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6064 fputc ('\n', asm_out_file);
6069 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
6071 register dw_separate_line_info_ref line_info
6072 = &separate_line_info_table[lt_index];
6075 /* Don't emit anything for redundant notes. */
6076 if (line_info->dw_line_num == current_line
6077 && line_info->dw_file_num == current_file
6078 && line_info->function == function)
6082 /* Emit debug info for the address of the current line. If this is
6083 a new function, or the first line of a function, then we need
6084 to handle it differently. */
6085 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
6087 if (function != line_info->function)
6089 function = line_info->function;
6091 /* Set the address register to the first line in the function */
6092 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6094 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6097 fputc ('\n', asm_out_file);
6098 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6099 fputc ('\n', asm_out_file);
6100 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6101 fputc ('\n', asm_out_file);
6102 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6103 fputc ('\n', asm_out_file);
6107 /* ??? See the DW_LNS_advance_pc comment above. */
6110 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6112 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6115 fputc ('\n', asm_out_file);
6116 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6118 fputc ('\n', asm_out_file);
6122 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6124 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6126 fputc ('\n', asm_out_file);
6127 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6128 fputc ('\n', asm_out_file);
6129 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6130 fputc ('\n', asm_out_file);
6131 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6132 fputc ('\n', asm_out_file);
6135 strcpy (prev_line_label, line_label);
6137 /* Emit debug info for the source file of the current line, if
6138 different from the previous line. */
6139 if (line_info->dw_file_num != current_file)
6141 current_file = line_info->dw_file_num;
6142 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
6144 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
6146 fputc ('\n', asm_out_file);
6147 output_uleb128 (current_file);
6149 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
6151 fputc ('\n', asm_out_file);
6154 /* Emit debug info for the current line number, choosing the encoding
6155 that uses the least amount of space. */
6156 if (line_info->dw_line_num != current_line)
6158 line_offset = line_info->dw_line_num - current_line;
6159 line_delta = line_offset - DWARF_LINE_BASE;
6160 current_line = line_info->dw_line_num;
6161 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6163 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6164 DWARF_LINE_OPCODE_BASE + line_delta);
6166 fprintf (asm_out_file,
6167 "\t%s line %ld", ASM_COMMENT_START, current_line);
6169 fputc ('\n', asm_out_file);
6173 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6175 fprintf (asm_out_file, "\t%s advance to line %ld",
6176 ASM_COMMENT_START, current_line);
6178 fputc ('\n', asm_out_file);
6179 output_sleb128 (line_offset);
6180 fputc ('\n', asm_out_file);
6181 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6183 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6184 fputc ('\n', asm_out_file);
6189 /* We still need to start a new row, so output a copy insn. */
6190 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6192 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6193 fputc ('\n', asm_out_file);
6201 /* If we're done with a function, end its sequence. */
6202 if (lt_index == separate_line_info_table_in_use
6203 || separate_line_info_table[lt_index].function != function)
6208 /* Emit debug info for the address of the end of the function. */
6209 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6212 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6214 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6217 fputc ('\n', asm_out_file);
6218 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6220 fputc ('\n', asm_out_file);
6224 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6226 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6228 fputc ('\n', asm_out_file);
6229 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6230 fputc ('\n', asm_out_file);
6231 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6232 fputc ('\n', asm_out_file);
6233 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6234 fputc ('\n', asm_out_file);
6237 /* Output the marker for the end of this sequence. */
6238 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6240 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6243 fputc ('\n', asm_out_file);
6245 fputc ('\n', asm_out_file);
6246 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6247 fputc ('\n', asm_out_file);
6251 /* Output the marker for the end of the line number info. */
6252 ASM_OUTPUT_LABEL (asm_out_file, ".LTEND");
6255 /* Given a pointer to a tree node for some base type, return a pointer to
6256 a DIE that describes the given type.
6258 This routine must only be called for GCC type nodes that correspond to
6259 Dwarf base (fundamental) types. */
6262 base_type_die (type)
6265 register dw_die_ref base_type_result;
6266 register const char *type_name;
6267 register enum dwarf_type encoding;
6268 register tree name = TYPE_NAME (type);
6270 if (TREE_CODE (type) == ERROR_MARK
6271 || TREE_CODE (type) == VOID_TYPE)
6276 if (TREE_CODE (name) == TYPE_DECL)
6277 name = DECL_NAME (name);
6279 type_name = IDENTIFIER_POINTER (name);
6282 type_name = "__unknown__";
6284 switch (TREE_CODE (type))
6287 /* Carefully distinguish the C character types, without messing
6288 up if the language is not C. Note that we check only for the names
6289 that contain spaces; other names might occur by coincidence in other
6291 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6292 && (type == char_type_node
6293 || ! strcmp (type_name, "signed char")
6294 || ! strcmp (type_name, "unsigned char"))))
6296 if (TREE_UNSIGNED (type))
6297 encoding = DW_ATE_unsigned;
6299 encoding = DW_ATE_signed;
6302 /* else fall through */
6305 /* GNU Pascal/Ada CHAR type. Not used in C. */
6306 if (TREE_UNSIGNED (type))
6307 encoding = DW_ATE_unsigned_char;
6309 encoding = DW_ATE_signed_char;
6313 encoding = DW_ATE_float;
6316 /* Dwarf2 doesn't know anything about complex ints, so use
6317 a user defined type for it. */
6319 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
6320 encoding = DW_ATE_complex_float;
6322 encoding = DW_ATE_lo_user;
6326 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6327 encoding = DW_ATE_boolean;
6331 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6334 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6335 if (demangle_name_func)
6336 type_name = (*demangle_name_func) (type_name);
6338 add_AT_string (base_type_result, DW_AT_name, type_name);
6339 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6340 int_size_in_bytes (type));
6341 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6343 return base_type_result;
6346 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6347 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6348 a given type is generally the same as the given type, except that if the
6349 given type is a pointer or reference type, then the root type of the given
6350 type is the root type of the "basis" type for the pointer or reference
6351 type. (This definition of the "root" type is recursive.) Also, the root
6352 type of a `const' qualified type or a `volatile' qualified type is the
6353 root type of the given type without the qualifiers. */
6359 if (TREE_CODE (type) == ERROR_MARK)
6360 return error_mark_node;
6362 switch (TREE_CODE (type))
6365 return error_mark_node;
6368 case REFERENCE_TYPE:
6369 return type_main_variant (root_type (TREE_TYPE (type)));
6372 return type_main_variant (type);
6376 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6377 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6383 switch (TREE_CODE (type))
6398 case QUAL_UNION_TYPE:
6403 case REFERENCE_TYPE:
6416 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6417 entry that chains various modifiers in front of the given type. */
6420 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6422 register int is_const_type;
6423 register int is_volatile_type;
6424 register dw_die_ref context_die;
6426 register enum tree_code code = TREE_CODE (type);
6427 register dw_die_ref mod_type_die = NULL;
6428 register dw_die_ref sub_die = NULL;
6429 register tree item_type = NULL;
6431 if (code != ERROR_MARK)
6433 type = build_type_variant (type, is_const_type, is_volatile_type);
6435 mod_type_die = lookup_type_die (type);
6437 return mod_type_die;
6439 /* Handle C typedef types. */
6440 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6441 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6443 tree dtype = TREE_TYPE (TYPE_NAME (type));
6446 /* For a named type, use the typedef. */
6447 gen_type_die (type, context_die);
6448 mod_type_die = lookup_type_die (type);
6451 else if (is_const_type < TYPE_READONLY (dtype)
6452 || is_volatile_type < TYPE_VOLATILE (dtype))
6453 /* cv-unqualified version of named type. Just use the unnamed
6454 type to which it refers. */
6456 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6457 is_const_type, is_volatile_type,
6459 /* Else cv-qualified version of named type; fall through. */
6464 else if (is_const_type)
6466 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6467 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6469 else if (is_volatile_type)
6471 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6472 sub_die = modified_type_die (type, 0, 0, context_die);
6474 else if (code == POINTER_TYPE)
6476 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6477 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6479 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6481 item_type = TREE_TYPE (type);
6483 else if (code == REFERENCE_TYPE)
6485 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6486 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6488 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6490 item_type = TREE_TYPE (type);
6492 else if (is_base_type (type))
6493 mod_type_die = base_type_die (type);
6496 gen_type_die (type, context_die);
6498 /* We have to get the type_main_variant here (and pass that to the
6499 `lookup_type_die' routine) because the ..._TYPE node we have
6500 might simply be a *copy* of some original type node (where the
6501 copy was created to help us keep track of typedef names) and
6502 that copy might have a different TYPE_UID from the original
6504 mod_type_die = lookup_type_die (type_main_variant (type));
6505 if (mod_type_die == NULL)
6510 equate_type_number_to_die (type, mod_type_die);
6512 /* We must do this after the equate_type_number_to_die call, in case
6513 this is a recursive type. This ensures that the modified_type_die
6514 recursion will terminate even if the type is recursive. Recursive
6515 types are possible in Ada. */
6516 sub_die = modified_type_die (item_type,
6517 TYPE_READONLY (item_type),
6518 TYPE_VOLATILE (item_type),
6521 if (sub_die != NULL)
6522 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6524 return mod_type_die;
6527 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6528 an enumerated type. */
6534 return TREE_CODE (type) == ENUMERAL_TYPE;
6537 /* Return the register number described by a given RTL node. */
6543 register unsigned regno = REGNO (rtl);
6545 if (regno >= FIRST_PSEUDO_REGISTER)
6547 warning ("internal regno botch: regno = %d\n", regno);
6551 regno = DBX_REGISTER_NUMBER (regno);
6555 /* Return a location descriptor that designates a machine register. */
6557 static dw_loc_descr_ref
6558 reg_loc_descriptor (rtl)
6561 register dw_loc_descr_ref loc_result = NULL;
6562 register unsigned reg = reg_number (rtl);
6565 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6567 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6572 /* Return a location descriptor that designates a base+offset location. */
6574 static dw_loc_descr_ref
6575 based_loc_descr (reg, offset)
6579 register dw_loc_descr_ref loc_result;
6580 /* For the "frame base", we use the frame pointer or stack pointer
6581 registers, since the RTL for local variables is relative to one of
6583 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6584 ? HARD_FRAME_POINTER_REGNUM
6585 : STACK_POINTER_REGNUM);
6588 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6590 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6592 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6597 /* Return true if this RTL expression describes a base+offset calculation. */
6603 return (GET_CODE (rtl) == PLUS
6604 && ((GET_CODE (XEXP (rtl, 0)) == REG
6605 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6608 /* The following routine converts the RTL for a variable or parameter
6609 (resident in memory) into an equivalent Dwarf representation of a
6610 mechanism for getting the address of that same variable onto the top of a
6611 hypothetical "address evaluation" stack.
6613 When creating memory location descriptors, we are effectively transforming
6614 the RTL for a memory-resident object into its Dwarf postfix expression
6615 equivalent. This routine recursively descends an RTL tree, turning
6616 it into Dwarf postfix code as it goes.
6618 MODE is the mode of the memory reference, needed to handle some
6619 autoincrement addressing modes. */
6621 static dw_loc_descr_ref
6622 mem_loc_descriptor (rtl, mode)
6624 enum machine_mode mode;
6626 dw_loc_descr_ref mem_loc_result = NULL;
6627 /* Note that for a dynamically sized array, the location we will generate a
6628 description of here will be the lowest numbered location which is
6629 actually within the array. That's *not* necessarily the same as the
6630 zeroth element of the array. */
6632 #ifdef ASM_SIMPLIFY_DWARF_ADDR
6633 rtl = ASM_SIMPLIFY_DWARF_ADDR (rtl);
6636 switch (GET_CODE (rtl))
6640 /* POST_INC and POST_DEC can be handled just like a SUBREG. So we
6641 just fall into the SUBREG code. */
6643 /* ... fall through ... */
6646 /* The case of a subreg may arise when we have a local (register)
6647 variable or a formal (register) parameter which doesn't quite fill
6648 up an entire register. For now, just assume that it is
6649 legitimate to make the Dwarf info refer to the whole register which
6650 contains the given subreg. */
6651 rtl = XEXP (rtl, 0);
6653 /* ... fall through ... */
6656 /* Whenever a register number forms a part of the description of the
6657 method for calculating the (dynamic) address of a memory resident
6658 object, DWARF rules require the register number be referred to as
6659 a "base register". This distinction is not based in any way upon
6660 what category of register the hardware believes the given register
6661 belongs to. This is strictly DWARF terminology we're dealing with
6662 here. Note that in cases where the location of a memory-resident
6663 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6664 OP_CONST (0)) the actual DWARF location descriptor that we generate
6665 may just be OP_BASEREG (basereg). This may look deceptively like
6666 the object in question was allocated to a register (rather than in
6667 memory) so DWARF consumers need to be aware of the subtle
6668 distinction between OP_REG and OP_BASEREG. */
6669 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6673 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode);
6674 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6678 /* Some ports can transform a symbol ref into a label ref, because
6679 the symbol ref is too far away and has to be dumped into a constant
6683 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6684 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6685 mem_loc_result->dw_loc_oprnd1.v.val_addr = save_rtx (rtl);
6690 /* Turn these into a PLUS expression and fall into the PLUS code
6692 rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0),
6693 GEN_INT (GET_CODE (rtl) == PRE_INC
6694 ? GET_MODE_UNIT_SIZE (mode)
6695 : - GET_MODE_UNIT_SIZE (mode)));
6697 /* ... fall through ... */
6700 if (is_based_loc (rtl))
6701 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6702 INTVAL (XEXP (rtl, 1)));
6705 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0),
6707 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1),
6709 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6714 /* If a pseudo-reg is optimized away, it is possible for it to
6715 be replaced with a MEM containing a multiply. */
6716 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0), mode));
6717 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1), mode));
6718 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6722 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6729 return mem_loc_result;
6732 /* Return a descriptor that describes the concatenation of two locations.
6733 This is typically a complex variable. */
6735 static dw_loc_descr_ref
6736 concat_loc_descriptor (x0, x1)
6737 register rtx x0, x1;
6739 dw_loc_descr_ref cc_loc_result = NULL;
6741 if (!is_pseudo_reg (x0)
6742 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6743 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6744 add_loc_descr (&cc_loc_result,
6745 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6747 if (!is_pseudo_reg (x1)
6748 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6749 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6750 add_loc_descr (&cc_loc_result,
6751 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6753 return cc_loc_result;
6756 /* Output a proper Dwarf location descriptor for a variable or parameter
6757 which is either allocated in a register or in a memory location. For a
6758 register, we just generate an OP_REG and the register number. For a
6759 memory location we provide a Dwarf postfix expression describing how to
6760 generate the (dynamic) address of the object onto the address stack. */
6762 static dw_loc_descr_ref
6763 loc_descriptor (rtl)
6766 dw_loc_descr_ref loc_result = NULL;
6767 switch (GET_CODE (rtl))
6770 /* The case of a subreg may arise when we have a local (register)
6771 variable or a formal (register) parameter which doesn't quite fill
6772 up an entire register. For now, just assume that it is
6773 legitimate to make the Dwarf info refer to the whole register which
6774 contains the given subreg. */
6775 rtl = XEXP (rtl, 0);
6777 /* ... fall through ... */
6780 loc_result = reg_loc_descriptor (rtl);
6784 loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl));
6788 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6798 /* Given a value, round it up to the lowest multiple of `boundary'
6799 which is not less than the value itself. */
6801 static inline HOST_WIDE_INT
6802 ceiling (value, boundary)
6803 HOST_WIDE_INT value;
6804 unsigned int boundary;
6806 return (((value + boundary - 1) / boundary) * boundary);
6809 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6810 pointer to the declared type for the relevant field variable, or return
6811 `integer_type_node' if the given node turns out to be an
6820 if (TREE_CODE (decl) == ERROR_MARK)
6821 return integer_type_node;
6823 type = DECL_BIT_FIELD_TYPE (decl);
6824 if (type == NULL_TREE)
6825 type = TREE_TYPE (decl);
6830 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6831 node, return the alignment in bits for the type, or else return
6832 BITS_PER_WORD if the node actually turns out to be an
6835 static inline unsigned
6836 simple_type_align_in_bits (type)
6839 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6842 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6843 node, return the size in bits for the type if it is a constant, or else
6844 return the alignment for the type if the type's size is not constant, or
6845 else return BITS_PER_WORD if the type actually turns out to be an
6848 static inline unsigned HOST_WIDE_INT
6849 simple_type_size_in_bits (type)
6852 if (TREE_CODE (type) == ERROR_MARK)
6853 return BITS_PER_WORD;
6856 register tree type_size_tree = TYPE_SIZE (type);
6858 if (! host_integerp (type_size_tree, 1))
6859 return TYPE_ALIGN (type);
6861 return tree_low_cst (type_size_tree, 1);
6865 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6866 return the byte offset of the lowest addressed byte of the "containing
6867 object" for the given FIELD_DECL, or return 0 if we are unable to
6868 determine what that offset is, either because the argument turns out to
6869 be a pointer to an ERROR_MARK node, or because the offset is actually
6870 variable. (We can't handle the latter case just yet). */
6872 static HOST_WIDE_INT
6873 field_byte_offset (decl)
6876 unsigned int type_align_in_bytes;
6877 unsigned int type_align_in_bits;
6878 unsigned HOST_WIDE_INT type_size_in_bits;
6879 HOST_WIDE_INT object_offset_in_align_units;
6880 HOST_WIDE_INT object_offset_in_bits;
6881 HOST_WIDE_INT object_offset_in_bytes;
6883 tree field_size_tree;
6884 HOST_WIDE_INT bitpos_int;
6885 HOST_WIDE_INT deepest_bitpos;
6886 unsigned HOST_WIDE_INT field_size_in_bits;
6888 if (TREE_CODE (decl) == ERROR_MARK)
6891 if (TREE_CODE (decl) != FIELD_DECL)
6894 type = field_type (decl);
6895 field_size_tree = DECL_SIZE (decl);
6897 /* If there was an error, the size could be zero. */
6898 if (! field_size_tree)
6906 /* We cannot yet cope with fields whose positions are variable, so
6907 for now, when we see such things, we simply return 0. Someday, we may
6908 be able to handle such cases, but it will be damn difficult. */
6909 if (! host_integerp (bit_position (decl), 0))
6912 bitpos_int = int_bit_position (decl);
6914 /* If we don't know the size of the field, pretend it's a full word. */
6915 if (host_integerp (field_size_tree, 1))
6916 field_size_in_bits = tree_low_cst (field_size_tree, 1);
6918 field_size_in_bits = BITS_PER_WORD;
6920 type_size_in_bits = simple_type_size_in_bits (type);
6921 type_align_in_bits = simple_type_align_in_bits (type);
6922 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6924 /* Note that the GCC front-end doesn't make any attempt to keep track of
6925 the starting bit offset (relative to the start of the containing
6926 structure type) of the hypothetical "containing object" for a bit-
6927 field. Thus, when computing the byte offset value for the start of the
6928 "containing object" of a bit-field, we must deduce this information on
6929 our own. This can be rather tricky to do in some cases. For example,
6930 handling the following structure type definition when compiling for an
6931 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6934 struct S { int field1; long long field2:31; };
6936 Fortunately, there is a simple rule-of-thumb which can be
6937 used in such cases. When compiling for an i386/i486, GCC will allocate
6938 8 bytes for the structure shown above. It decides to do this based upon
6939 one simple rule for bit-field allocation. Quite simply, GCC allocates
6940 each "containing object" for each bit-field at the first (i.e. lowest
6941 addressed) legitimate alignment boundary (based upon the required
6942 minimum alignment for the declared type of the field) which it can
6943 possibly use, subject to the condition that there is still enough
6944 available space remaining in the containing object (when allocated at
6945 the selected point) to fully accommodate all of the bits of the
6946 bit-field itself. This simple rule makes it obvious why GCC allocates
6947 8 bytes for each object of the structure type shown above. When looking
6948 for a place to allocate the "containing object" for `field2', the
6949 compiler simply tries to allocate a 64-bit "containing object" at each
6950 successive 32-bit boundary (starting at zero) until it finds a place to
6951 allocate that 64- bit field such that at least 31 contiguous (and
6952 previously unallocated) bits remain within that selected 64 bit field.
6953 (As it turns out, for the example above, the compiler finds that it is
6954 OK to allocate the "containing object" 64-bit field at bit-offset zero
6955 within the structure type.) Here we attempt to work backwards from the
6956 limited set of facts we're given, and we try to deduce from those facts,
6957 where GCC must have believed that the containing object started (within
6958 the structure type). The value we deduce is then used (by the callers of
6959 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6960 for fields (both bit-fields and, in the case of DW_AT_location, regular
6963 /* Figure out the bit-distance from the start of the structure to the
6964 "deepest" bit of the bit-field. */
6965 deepest_bitpos = bitpos_int + field_size_in_bits;
6967 /* This is the tricky part. Use some fancy footwork to deduce where the
6968 lowest addressed bit of the containing object must be. */
6969 object_offset_in_bits
6970 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6972 /* Compute the offset of the containing object in "alignment units". */
6973 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6975 /* Compute the offset of the containing object in bytes. */
6976 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6978 return object_offset_in_bytes;
6981 /* The following routines define various Dwarf attributes and any data
6982 associated with them. */
6984 /* Add a location description attribute value to a DIE.
6986 This emits location attributes suitable for whole variables and
6987 whole parameters. Note that the location attributes for struct fields are
6988 generated by the routine `data_member_location_attribute' below. */
6991 add_AT_location_description (die, attr_kind, rtl)
6993 enum dwarf_attribute attr_kind;
6996 /* Handle a special case. If we are about to output a location descriptor
6997 for a variable or parameter which has been optimized out of existence,
6998 don't do that. A variable which has been optimized out
6999 of existence will have a DECL_RTL value which denotes a pseudo-reg.
7000 Currently, in some rare cases, variables can have DECL_RTL values which
7001 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
7002 elsewhere in the compiler. We treat such cases as if the variable(s) in
7003 question had been optimized out of existence. */
7005 if (is_pseudo_reg (rtl)
7006 || (GET_CODE (rtl) == MEM
7007 && is_pseudo_reg (XEXP (rtl, 0)))
7008 /* This can happen for a PARM_DECL with a DECL_INCOMING_RTL which
7009 references the internal argument pointer (a pseudo) in a function
7010 where all references to the internal argument pointer were
7011 eliminated via the optimizers. */
7012 || (GET_CODE (rtl) == MEM
7013 && GET_CODE (XEXP (rtl, 0)) == PLUS
7014 && is_pseudo_reg (XEXP (XEXP (rtl, 0), 0)))
7015 || (GET_CODE (rtl) == CONCAT
7016 && is_pseudo_reg (XEXP (rtl, 0))
7017 && is_pseudo_reg (XEXP (rtl, 1))))
7020 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
7023 /* Attach the specialized form of location attribute used for data
7024 members of struct and union types. In the special case of a
7025 FIELD_DECL node which represents a bit-field, the "offset" part
7026 of this special location descriptor must indicate the distance
7027 in bytes from the lowest-addressed byte of the containing struct
7028 or union type to the lowest-addressed byte of the "containing
7029 object" for the bit-field. (See the `field_byte_offset' function
7030 above).. For any given bit-field, the "containing object" is a
7031 hypothetical object (of some integral or enum type) within which
7032 the given bit-field lives. The type of this hypothetical
7033 "containing object" is always the same as the declared type of
7034 the individual bit-field itself (for GCC anyway... the DWARF
7035 spec doesn't actually mandate this). Note that it is the size
7036 (in bytes) of the hypothetical "containing object" which will
7037 be given in the DW_AT_byte_size attribute for this bit-field.
7038 (See the `byte_size_attribute' function below.) It is also used
7039 when calculating the value of the DW_AT_bit_offset attribute.
7040 (See the `bit_offset_attribute' function below). */
7043 add_data_member_location_attribute (die, decl)
7044 register dw_die_ref die;
7047 register unsigned long offset;
7048 register dw_loc_descr_ref loc_descr;
7049 register enum dwarf_location_atom op;
7051 if (TREE_CODE (decl) == TREE_VEC)
7052 offset = tree_low_cst (BINFO_OFFSET (decl), 0);
7054 offset = field_byte_offset (decl);
7056 /* The DWARF2 standard says that we should assume that the structure address
7057 is already on the stack, so we can specify a structure field address
7058 by using DW_OP_plus_uconst. */
7060 #ifdef MIPS_DEBUGGING_INFO
7061 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
7062 correctly. It works only if we leave the offset on the stack. */
7065 op = DW_OP_plus_uconst;
7068 loc_descr = new_loc_descr (op, offset, 0);
7069 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
7072 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
7073 does not have a "location" either in memory or in a register. These
7074 things can arise in GNU C when a constant is passed as an actual parameter
7075 to an inlined function. They can also arise in C++ where declared
7076 constants do not necessarily get memory "homes". */
7079 add_const_value_attribute (die, rtl)
7080 register dw_die_ref die;
7083 switch (GET_CODE (rtl))
7086 /* Note that a CONST_INT rtx could represent either an integer or a
7087 floating-point constant. A CONST_INT is used whenever the constant
7088 will fit into a single word. In all such cases, the original mode
7089 of the constant value is wiped out, and the CONST_INT rtx is
7090 assigned VOIDmode. */
7091 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
7095 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
7096 floating-point constant. A CONST_DOUBLE is used whenever the
7097 constant requires more than one word in order to be adequately
7098 represented. We output CONST_DOUBLEs as blocks. */
7100 register enum machine_mode mode = GET_MODE (rtl);
7102 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
7104 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
7108 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
7112 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
7116 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
7121 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
7128 add_AT_float (die, DW_AT_const_value, length, array);
7131 add_AT_long_long (die, DW_AT_const_value,
7132 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
7137 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
7143 add_AT_addr (die, DW_AT_const_value, save_rtx (rtl));
7147 /* In cases where an inlined instance of an inline function is passed
7148 the address of an `auto' variable (which is local to the caller) we
7149 can get a situation where the DECL_RTL of the artificial local
7150 variable (for the inlining) which acts as a stand-in for the
7151 corresponding formal parameter (of the inline function) will look
7152 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
7153 exactly a compile-time constant expression, but it isn't the address
7154 of the (artificial) local variable either. Rather, it represents the
7155 *value* which the artificial local variable always has during its
7156 lifetime. We currently have no way to represent such quasi-constant
7157 values in Dwarf, so for now we just punt and generate nothing. */
7161 /* No other kinds of rtx should be possible here. */
7167 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
7168 data attribute for a variable or a parameter. We generate the
7169 DW_AT_const_value attribute only in those cases where the given variable
7170 or parameter does not have a true "location" either in memory or in a
7171 register. This can happen (for example) when a constant is passed as an
7172 actual argument in a call to an inline function. (It's possible that
7173 these things can crop up in other ways also.) Note that one type of
7174 constant value which can be passed into an inlined function is a constant
7175 pointer. This can happen for example if an actual argument in an inlined
7176 function call evaluates to a compile-time constant address. */
7179 add_location_or_const_value_attribute (die, decl)
7180 register dw_die_ref die;
7184 register tree declared_type;
7185 register tree passed_type;
7187 if (TREE_CODE (decl) == ERROR_MARK)
7190 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
7193 /* Here we have to decide where we are going to say the parameter "lives"
7194 (as far as the debugger is concerned). We only have a couple of
7195 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
7197 DECL_RTL normally indicates where the parameter lives during most of the
7198 activation of the function. If optimization is enabled however, this
7199 could be either NULL or else a pseudo-reg. Both of those cases indicate
7200 that the parameter doesn't really live anywhere (as far as the code
7201 generation parts of GCC are concerned) during most of the function's
7202 activation. That will happen (for example) if the parameter is never
7203 referenced within the function.
7205 We could just generate a location descriptor here for all non-NULL
7206 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
7207 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
7208 where DECL_RTL is NULL or is a pseudo-reg.
7210 Note however that we can only get away with using DECL_INCOMING_RTL as
7211 a backup substitute for DECL_RTL in certain limited cases. In cases
7212 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7213 we can be sure that the parameter was passed using the same type as it is
7214 declared to have within the function, and that its DECL_INCOMING_RTL
7215 points us to a place where a value of that type is passed.
7217 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7218 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7219 because in these cases DECL_INCOMING_RTL points us to a value of some
7220 type which is *different* from the type of the parameter itself. Thus,
7221 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7222 such cases, the debugger would end up (for example) trying to fetch a
7223 `float' from a place which actually contains the first part of a
7224 `double'. That would lead to really incorrect and confusing
7225 output at debug-time.
7227 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7228 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7229 are a couple of exceptions however. On little-endian machines we can
7230 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7231 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7232 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7233 when (on a little-endian machine) a non-prototyped function has a
7234 parameter declared to be of type `short' or `char'. In such cases,
7235 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7236 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7237 passed `int' value. If the debugger then uses that address to fetch
7238 a `short' or a `char' (on a little-endian machine) the result will be
7239 the correct data, so we allow for such exceptional cases below.
7241 Note that our goal here is to describe the place where the given formal
7242 parameter lives during most of the function's activation (i.e. between
7243 the end of the prologue and the start of the epilogue). We'll do that
7244 as best as we can. Note however that if the given formal parameter is
7245 modified sometime during the execution of the function, then a stack
7246 backtrace (at debug-time) will show the function as having been
7247 called with the *new* value rather than the value which was
7248 originally passed in. This happens rarely enough that it is not
7249 a major problem, but it *is* a problem, and I'd like to fix it.
7251 A future version of dwarf2out.c may generate two additional
7252 attributes for any given DW_TAG_formal_parameter DIE which will
7253 describe the "passed type" and the "passed location" for the
7254 given formal parameter in addition to the attributes we now
7255 generate to indicate the "declared type" and the "active
7256 location" for each parameter. This additional set of attributes
7257 could be used by debuggers for stack backtraces. Separately, note
7258 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7259 NULL also. This happens (for example) for inlined-instances of
7260 inline function formal parameters which are never referenced.
7261 This really shouldn't be happening. All PARM_DECL nodes should
7262 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7263 doesn't currently generate these values for inlined instances of
7264 inline function parameters, so when we see such cases, we are
7265 just out-of-luck for the time being (until integrate.c
7268 /* Use DECL_RTL as the "location" unless we find something better. */
7269 rtl = DECL_RTL (decl);
7271 if (TREE_CODE (decl) == PARM_DECL)
7273 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7275 declared_type = type_main_variant (TREE_TYPE (decl));
7276 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7278 /* This decl represents a formal parameter which was optimized out.
7279 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7280 all* cases where (rtl == NULL_RTX) just below. */
7281 if (declared_type == passed_type)
7282 rtl = DECL_INCOMING_RTL (decl);
7283 else if (! BYTES_BIG_ENDIAN
7284 && TREE_CODE (declared_type) == INTEGER_TYPE
7285 && (GET_MODE_SIZE (TYPE_MODE (declared_type))
7286 <= GET_MODE_SIZE (TYPE_MODE (passed_type))))
7287 rtl = DECL_INCOMING_RTL (decl);
7290 /* If the parm was passed in registers, but lives on the stack, then
7291 make a big endian correction if the mode of the type of the
7292 parameter is not the same as the mode of the rtl. */
7293 /* ??? This is the same series of checks that are made in dbxout.c before
7294 we reach the big endian correction code there. It isn't clear if all
7295 of these checks are necessary here, but keeping them all is the safe
7297 else if (GET_CODE (rtl) == MEM
7298 && XEXP (rtl, 0) != const0_rtx
7299 && ! CONSTANT_P (XEXP (rtl, 0))
7300 /* Not passed in memory. */
7301 && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM
7302 /* Not passed by invisible reference. */
7303 && (GET_CODE (XEXP (rtl, 0)) != REG
7304 || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM
7305 || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM
7306 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
7307 || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM
7310 /* Big endian correction check. */
7312 && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl)
7313 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))
7316 int offset = (UNITS_PER_WORD
7317 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))));
7318 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
7319 plus_constant (XEXP (rtl, 0), offset));
7323 if (rtl == NULL_RTX)
7326 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7327 #ifdef LEAF_REG_REMAP
7328 if (current_function_uses_only_leaf_regs)
7329 leaf_renumber_regs_insn (rtl);
7332 switch (GET_CODE (rtl))
7335 /* The address of a variable that was optimized away; don't emit
7346 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7347 add_const_value_attribute (die, rtl);
7354 add_AT_location_description (die, DW_AT_location, rtl);
7362 /* Generate an DW_AT_name attribute given some string value to be included as
7363 the value of the attribute. */
7366 add_name_attribute (die, name_string)
7367 register dw_die_ref die;
7368 register const char *name_string;
7370 if (name_string != NULL && *name_string != 0)
7372 if (demangle_name_func)
7373 name_string = (*demangle_name_func) (name_string);
7375 add_AT_string (die, DW_AT_name, name_string);
7379 /* Given a tree node describing an array bound (either lower or upper) output
7380 a representation for that bound. */
7383 add_bound_info (subrange_die, bound_attr, bound)
7384 register dw_die_ref subrange_die;
7385 register enum dwarf_attribute bound_attr;
7386 register tree bound;
7388 /* If this is an Ada unconstrained array type, then don't emit any debug
7389 info because the array bounds are unknown. They are parameterized when
7390 the type is instantiated. */
7391 if (contains_placeholder_p (bound))
7394 switch (TREE_CODE (bound))
7399 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7401 if (! host_integerp (bound, 0)
7402 || (bound_attr == DW_AT_lower_bound
7403 && ((is_c_family () && integer_zerop (bound))
7404 || (is_fortran () && integer_onep (bound)))))
7405 /* use the default */
7408 add_AT_unsigned (subrange_die, bound_attr, tree_low_cst (bound, 0));
7413 case NON_LVALUE_EXPR:
7414 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7418 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7419 access the upper bound values may be bogus. If they refer to a
7420 register, they may only describe how to get at these values at the
7421 points in the generated code right after they have just been
7422 computed. Worse yet, in the typical case, the upper bound values
7423 will not even *be* computed in the optimized code (though the
7424 number of elements will), so these SAVE_EXPRs are entirely
7425 bogus. In order to compensate for this fact, we check here to see
7426 if optimization is enabled, and if so, we don't add an attribute
7427 for the (unknown and unknowable) upper bound. This should not
7428 cause too much trouble for existing (stupid?) debuggers because
7429 they have to deal with empty upper bounds location descriptions
7430 anyway in order to be able to deal with incomplete array types.
7431 Of course an intelligent debugger (GDB?) should be able to
7432 comprehend that a missing upper bound specification in a array
7433 type used for a storage class `auto' local array variable
7434 indicates that the upper bound is both unknown (at compile- time)
7435 and unknowable (at run-time) due to optimization.
7437 We assume that a MEM rtx is safe because gcc wouldn't put the
7438 value there unless it was going to be used repeatedly in the
7439 function, i.e. for cleanups. */
7440 if (! optimize || (SAVE_EXPR_RTL (bound)
7441 && GET_CODE (SAVE_EXPR_RTL (bound)) == MEM))
7443 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7444 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7445 register rtx loc = SAVE_EXPR_RTL (bound);
7447 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7448 it references an outer function's frame. */
7450 if (GET_CODE (loc) == MEM)
7452 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7454 if (XEXP (loc, 0) != new_addr)
7455 loc = gen_rtx_MEM (GET_MODE (loc), new_addr);
7458 add_AT_flag (decl_die, DW_AT_artificial, 1);
7459 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7460 add_AT_location_description (decl_die, DW_AT_location, loc);
7461 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7464 /* Else leave out the attribute. */
7470 /* ??? These types of bounds can be created by the Ada front end,
7471 and it isn't clear how to emit debug info for them. */
7479 /* Note that the block of subscript information for an array type also
7480 includes information about the element type of type given array type. */
7483 add_subscript_info (type_die, type)
7484 register dw_die_ref type_die;
7487 #ifndef MIPS_DEBUGGING_INFO
7488 register unsigned dimension_number;
7490 register tree lower, upper;
7491 register dw_die_ref subrange_die;
7493 /* The GNU compilers represent multidimensional array types as sequences of
7494 one dimensional array types whose element types are themselves array
7495 types. Here we squish that down, so that each multidimensional array
7496 type gets only one array_type DIE in the Dwarf debugging info. The draft
7497 Dwarf specification say that we are allowed to do this kind of
7498 compression in C (because there is no difference between an array or
7499 arrays and a multidimensional array in C) but for other source languages
7500 (e.g. Ada) we probably shouldn't do this. */
7502 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7503 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7504 We work around this by disabling this feature. See also
7505 gen_array_type_die. */
7506 #ifndef MIPS_DEBUGGING_INFO
7507 for (dimension_number = 0;
7508 TREE_CODE (type) == ARRAY_TYPE;
7509 type = TREE_TYPE (type), dimension_number++)
7512 register tree domain = TYPE_DOMAIN (type);
7514 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7515 and (in GNU C only) variable bounds. Handle all three forms
7517 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7520 /* We have an array type with specified bounds. */
7521 lower = TYPE_MIN_VALUE (domain);
7522 upper = TYPE_MAX_VALUE (domain);
7524 /* define the index type. */
7525 if (TREE_TYPE (domain))
7527 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7528 TREE_TYPE field. We can't emit debug info for this
7529 because it is an unnamed integral type. */
7530 if (TREE_CODE (domain) == INTEGER_TYPE
7531 && TYPE_NAME (domain) == NULL_TREE
7532 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7533 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7536 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7540 /* ??? If upper is NULL, the array has unspecified length,
7541 but it does have a lower bound. This happens with Fortran
7543 Since the debugger is definitely going to need to know N
7544 to produce useful results, go ahead and output the lower
7545 bound solo, and hope the debugger can cope. */
7547 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7549 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7552 /* We have an array type with an unspecified length. The DWARF-2
7553 spec does not say how to handle this; let's just leave out the
7558 #ifndef MIPS_DEBUGGING_INFO
7564 add_byte_size_attribute (die, tree_node)
7566 register tree tree_node;
7568 register unsigned size;
7570 switch (TREE_CODE (tree_node))
7578 case QUAL_UNION_TYPE:
7579 size = int_size_in_bytes (tree_node);
7582 /* For a data member of a struct or union, the DW_AT_byte_size is
7583 generally given as the number of bytes normally allocated for an
7584 object of the *declared* type of the member itself. This is true
7585 even for bit-fields. */
7586 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7592 /* Note that `size' might be -1 when we get to this point. If it is, that
7593 indicates that the byte size of the entity in question is variable. We
7594 have no good way of expressing this fact in Dwarf at the present time,
7595 so just let the -1 pass on through. */
7597 add_AT_unsigned (die, DW_AT_byte_size, size);
7600 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7601 which specifies the distance in bits from the highest order bit of the
7602 "containing object" for the bit-field to the highest order bit of the
7605 For any given bit-field, the "containing object" is a hypothetical
7606 object (of some integral or enum type) within which the given bit-field
7607 lives. The type of this hypothetical "containing object" is always the
7608 same as the declared type of the individual bit-field itself. The
7609 determination of the exact location of the "containing object" for a
7610 bit-field is rather complicated. It's handled by the
7611 `field_byte_offset' function (above).
7613 Note that it is the size (in bytes) of the hypothetical "containing object"
7614 which will be given in the DW_AT_byte_size attribute for this bit-field.
7615 (See `byte_size_attribute' above). */
7618 add_bit_offset_attribute (die, decl)
7619 register dw_die_ref die;
7622 HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl);
7623 tree type = DECL_BIT_FIELD_TYPE (decl);
7624 HOST_WIDE_INT bitpos_int;
7625 HOST_WIDE_INT highest_order_object_bit_offset;
7626 HOST_WIDE_INT highest_order_field_bit_offset;
7627 HOST_WIDE_INT unsigned bit_offset;
7629 /* Must be a field and a bit field. */
7631 || TREE_CODE (decl) != FIELD_DECL)
7634 /* We can't yet handle bit-fields whose offsets are variable, so if we
7635 encounter such things, just return without generating any attribute
7636 whatsoever. Likewise for variable or too large size. */
7637 if (! host_integerp (bit_position (decl), 0)
7638 || ! host_integerp (DECL_SIZE (decl), 1))
7641 bitpos_int = int_bit_position (decl);
7643 /* Note that the bit offset is always the distance (in bits) from the
7644 highest-order bit of the "containing object" to the highest-order bit of
7645 the bit-field itself. Since the "high-order end" of any object or field
7646 is different on big-endian and little-endian machines, the computation
7647 below must take account of these differences. */
7648 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7649 highest_order_field_bit_offset = bitpos_int;
7651 if (! BYTES_BIG_ENDIAN)
7653 highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0);
7654 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7658 = (! BYTES_BIG_ENDIAN
7659 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7660 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7662 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7665 /* For a FIELD_DECL node which represents a bit field, output an attribute
7666 which specifies the length in bits of the given field. */
7669 add_bit_size_attribute (die, decl)
7670 register dw_die_ref die;
7673 /* Must be a field and a bit field. */
7674 if (TREE_CODE (decl) != FIELD_DECL
7675 || ! DECL_BIT_FIELD_TYPE (decl))
7678 if (host_integerp (DECL_SIZE (decl), 1))
7679 add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1));
7682 /* If the compiled language is ANSI C, then add a 'prototyped'
7683 attribute, if arg types are given for the parameters of a function. */
7686 add_prototyped_attribute (die, func_type)
7687 register dw_die_ref die;
7688 register tree func_type;
7690 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7691 && TYPE_ARG_TYPES (func_type) != NULL)
7692 add_AT_flag (die, DW_AT_prototyped, 1);
7696 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7697 by looking in either the type declaration or object declaration
7701 add_abstract_origin_attribute (die, origin)
7702 register dw_die_ref die;
7703 register tree origin;
7705 dw_die_ref origin_die = NULL;
7707 if (TREE_CODE (origin) != FUNCTION_DECL)
7709 /* We may have gotten separated from the block for the inlined
7710 function, if we're in an exception handler or some such; make
7711 sure that the abstract function has been written out.
7713 Doing this for nested functions is wrong, however; functions are
7714 distinct units, and our context might not even be inline. */
7717 fn = TYPE_STUB_DECL (fn);
7718 fn = decl_function_context (fn);
7720 gen_abstract_function (fn);
7723 if (DECL_P (origin))
7724 origin_die = lookup_decl_die (origin);
7725 else if (TYPE_P (origin))
7726 origin_die = lookup_type_die (origin);
7728 if (origin_die == NULL)
7731 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7734 /* We do not currently support the pure_virtual attribute. */
7737 add_pure_or_virtual_attribute (die, func_decl)
7738 register dw_die_ref die;
7739 register tree func_decl;
7741 if (DECL_VINDEX (func_decl))
7743 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7745 if (host_integerp (DECL_VINDEX (func_decl), 0))
7746 add_AT_loc (die, DW_AT_vtable_elem_location,
7747 new_loc_descr (DW_OP_constu,
7748 tree_low_cst (DECL_VINDEX (func_decl), 0),
7751 /* GNU extension: Record what type this method came from originally. */
7752 if (debug_info_level > DINFO_LEVEL_TERSE)
7753 add_AT_die_ref (die, DW_AT_containing_type,
7754 lookup_type_die (DECL_CONTEXT (func_decl)));
7758 /* Add source coordinate attributes for the given decl. */
7761 add_src_coords_attributes (die, decl)
7762 register dw_die_ref die;
7765 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7767 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7768 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7771 /* Add an DW_AT_name attribute and source coordinate attribute for the
7772 given decl, but only if it actually has a name. */
7775 add_name_and_src_coords_attributes (die, decl)
7776 register dw_die_ref die;
7779 register tree decl_name;
7781 decl_name = DECL_NAME (decl);
7782 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7784 add_name_attribute (die, dwarf2_name (decl, 0));
7785 if (! DECL_ARTIFICIAL (decl))
7786 add_src_coords_attributes (die, decl);
7788 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7789 && TREE_PUBLIC (decl)
7790 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7791 add_AT_string (die, DW_AT_MIPS_linkage_name,
7792 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7796 /* Push a new declaration scope. */
7799 push_decl_scope (scope)
7802 /* Make room in the decl_scope_table, if necessary. */
7803 if (decl_scope_table_allocated == decl_scope_depth)
7805 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7807 = (tree *) xrealloc (decl_scope_table,
7808 decl_scope_table_allocated * sizeof (tree));
7811 decl_scope_table[decl_scope_depth] = scope;
7815 /* Pop a declaration scope. */
7819 if (decl_scope_depth <= 0)
7824 /* Return the DIE for the scope that immediately contains this type.
7825 Non-named types get global scope. Named types nested in other
7826 types get their containing scope if it's open, or global scope
7827 otherwise. All other types (i.e. function-local named types) get
7828 the current active scope. */
7831 scope_die_for (t, context_die)
7833 register dw_die_ref context_die;
7835 register dw_die_ref scope_die = NULL;
7836 register tree containing_scope;
7839 /* Non-types always go in the current scope. */
7843 containing_scope = TYPE_CONTEXT (t);
7845 /* Ignore namespaces for the moment. */
7846 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7847 containing_scope = NULL_TREE;
7849 /* Ignore function type "scopes" from the C frontend. They mean that
7850 a tagged type is local to a parmlist of a function declarator, but
7851 that isn't useful to DWARF. */
7852 if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE)
7853 containing_scope = NULL_TREE;
7855 if (containing_scope == NULL_TREE)
7856 scope_die = comp_unit_die;
7857 else if (TYPE_P (containing_scope))
7859 /* For types, we can just look up the appropriate DIE. But
7860 first we check to see if we're in the middle of emitting it
7861 so we know where the new DIE should go. */
7863 for (i = decl_scope_depth - 1; i >= 0; --i)
7864 if (decl_scope_table[i] == containing_scope)
7869 if (debug_info_level > DINFO_LEVEL_TERSE
7870 && !TREE_ASM_WRITTEN (containing_scope))
7873 /* If none of the current dies are suitable, we get file scope. */
7874 scope_die = comp_unit_die;
7877 scope_die = lookup_type_die (containing_scope);
7880 scope_die = context_die;
7885 /* Returns nonzero iff CONTEXT_DIE is internal to a function. */
7887 static inline int local_scope_p PARAMS ((dw_die_ref));
7889 local_scope_p (context_die)
7890 dw_die_ref context_die;
7892 for (; context_die; context_die = context_die->die_parent)
7893 if (context_die->die_tag == DW_TAG_inlined_subroutine
7894 || context_die->die_tag == DW_TAG_subprogram)
7899 /* Returns nonzero iff CONTEXT_DIE is a class. */
7901 static inline int class_scope_p PARAMS ((dw_die_ref));
7903 class_scope_p (context_die)
7904 dw_die_ref context_die;
7907 && (context_die->die_tag == DW_TAG_structure_type
7908 || context_die->die_tag == DW_TAG_union_type));
7911 /* Many forms of DIEs require a "type description" attribute. This
7912 routine locates the proper "type descriptor" die for the type given
7913 by 'type', and adds an DW_AT_type attribute below the given die. */
7916 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7917 register dw_die_ref object_die;
7919 register int decl_const;
7920 register int decl_volatile;
7921 register dw_die_ref context_die;
7923 register enum tree_code code = TREE_CODE (type);
7924 register dw_die_ref type_die = NULL;
7926 /* ??? If this type is an unnamed subrange type of an integral or
7927 floating-point type, use the inner type. This is because we have no
7928 support for unnamed types in base_type_die. This can happen if this is
7929 an Ada subrange type. Correct solution is emit a subrange type die. */
7930 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7931 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7932 type = TREE_TYPE (type), code = TREE_CODE (type);
7934 if (code == ERROR_MARK)
7937 /* Handle a special case. For functions whose return type is void, we
7938 generate *no* type attribute. (Note that no object may have type
7939 `void', so this only applies to function return types). */
7940 if (code == VOID_TYPE)
7943 type_die = modified_type_die (type,
7944 decl_const || TYPE_READONLY (type),
7945 decl_volatile || TYPE_VOLATILE (type),
7947 if (type_die != NULL)
7948 add_AT_die_ref (object_die, DW_AT_type, type_die);
7951 /* Given a tree pointer to a struct, class, union, or enum type node, return
7952 a pointer to the (string) tag name for the given type, or zero if the type
7953 was declared without a tag. */
7959 register const char *name = 0;
7961 if (TYPE_NAME (type) != 0)
7963 register tree t = 0;
7965 /* Find the IDENTIFIER_NODE for the type name. */
7966 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7967 t = TYPE_NAME (type);
7969 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7970 a TYPE_DECL node, regardless of whether or not a `typedef' was
7972 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7973 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7974 t = DECL_NAME (TYPE_NAME (type));
7976 /* Now get the name as a string, or invent one. */
7978 name = IDENTIFIER_POINTER (t);
7981 return (name == 0 || *name == '\0') ? 0 : name;
7984 /* Return the type associated with a data member, make a special check
7985 for bit field types. */
7988 member_declared_type (member)
7989 register tree member;
7991 return (DECL_BIT_FIELD_TYPE (member)
7992 ? DECL_BIT_FIELD_TYPE (member)
7993 : TREE_TYPE (member));
7996 /* Get the decl's label, as described by its RTL. This may be different
7997 from the DECL_NAME name used in the source file. */
8001 decl_start_label (decl)
8006 x = DECL_RTL (decl);
8007 if (GET_CODE (x) != MEM)
8011 if (GET_CODE (x) != SYMBOL_REF)
8014 fnname = XSTR (x, 0);
8019 /* These routines generate the internal representation of the DIE's for
8020 the compilation unit. Debugging information is collected by walking
8021 the declaration trees passed in from dwarf2out_decl(). */
8024 gen_array_type_die (type, context_die)
8026 register dw_die_ref context_die;
8028 register dw_die_ref scope_die = scope_die_for (type, context_die);
8029 register dw_die_ref array_die;
8030 register tree element_type;
8032 /* ??? The SGI dwarf reader fails for array of array of enum types unless
8033 the inner array type comes before the outer array type. Thus we must
8034 call gen_type_die before we call new_die. See below also. */
8035 #ifdef MIPS_DEBUGGING_INFO
8036 gen_type_die (TREE_TYPE (type), context_die);
8039 array_die = new_die (DW_TAG_array_type, scope_die);
8042 /* We default the array ordering. SDB will probably do
8043 the right things even if DW_AT_ordering is not present. It's not even
8044 an issue until we start to get into multidimensional arrays anyway. If
8045 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
8046 then we'll have to put the DW_AT_ordering attribute back in. (But if
8047 and when we find out that we need to put these in, we will only do so
8048 for multidimensional arrays. */
8049 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
8052 #ifdef MIPS_DEBUGGING_INFO
8053 /* The SGI compilers handle arrays of unknown bound by setting
8054 AT_declaration and not emitting any subrange DIEs. */
8055 if (! TYPE_DOMAIN (type))
8056 add_AT_unsigned (array_die, DW_AT_declaration, 1);
8059 add_subscript_info (array_die, type);
8061 add_name_attribute (array_die, type_tag (type));
8062 equate_type_number_to_die (type, array_die);
8064 /* Add representation of the type of the elements of this array type. */
8065 element_type = TREE_TYPE (type);
8067 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
8068 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
8069 We work around this by disabling this feature. See also
8070 add_subscript_info. */
8071 #ifndef MIPS_DEBUGGING_INFO
8072 while (TREE_CODE (element_type) == ARRAY_TYPE)
8073 element_type = TREE_TYPE (element_type);
8075 gen_type_die (element_type, context_die);
8078 add_type_attribute (array_die, element_type, 0, 0, context_die);
8082 gen_set_type_die (type, context_die)
8084 register dw_die_ref context_die;
8086 register dw_die_ref type_die
8087 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
8089 equate_type_number_to_die (type, type_die);
8090 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
8095 gen_entry_point_die (decl, context_die)
8097 register dw_die_ref context_die;
8099 register tree origin = decl_ultimate_origin (decl);
8100 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
8102 add_abstract_origin_attribute (decl_die, origin);
8105 add_name_and_src_coords_attributes (decl_die, decl);
8106 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
8110 if (DECL_ABSTRACT (decl))
8111 equate_decl_number_to_die (decl, decl_die);
8113 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
8117 /* Remember a type in the incomplete_types_list. */
8120 add_incomplete_type (type)
8123 if (incomplete_types == incomplete_types_allocated)
8125 incomplete_types_allocated += INCOMPLETE_TYPES_INCREMENT;
8126 incomplete_types_list
8127 = (tree *) xrealloc (incomplete_types_list,
8128 sizeof (tree) * incomplete_types_allocated);
8131 incomplete_types_list[incomplete_types++] = type;
8134 /* Walk through the list of incomplete types again, trying once more to
8135 emit full debugging info for them. */
8138 retry_incomplete_types ()
8142 while (incomplete_types)
8145 type = incomplete_types_list[incomplete_types];
8146 gen_type_die (type, comp_unit_die);
8150 /* Generate a DIE to represent an inlined instance of an enumeration type. */
8153 gen_inlined_enumeration_type_die (type, context_die)
8155 register dw_die_ref context_die;
8157 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
8159 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8160 be incomplete and such types are not marked. */
8161 add_abstract_origin_attribute (type_die, type);
8164 /* Generate a DIE to represent an inlined instance of a structure type. */
8167 gen_inlined_structure_type_die (type, context_die)
8169 register dw_die_ref context_die;
8171 register dw_die_ref type_die = new_die (DW_TAG_structure_type, context_die);
8173 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8174 be incomplete and such types are not marked. */
8175 add_abstract_origin_attribute (type_die, type);
8178 /* Generate a DIE to represent an inlined instance of a union type. */
8181 gen_inlined_union_type_die (type, context_die)
8183 register dw_die_ref context_die;
8185 register dw_die_ref type_die = new_die (DW_TAG_union_type, context_die);
8187 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8188 be incomplete and such types are not marked. */
8189 add_abstract_origin_attribute (type_die, type);
8192 /* Generate a DIE to represent an enumeration type. Note that these DIEs
8193 include all of the information about the enumeration values also. Each
8194 enumerated type name/value is listed as a child of the enumerated type
8198 gen_enumeration_type_die (type, context_die)
8200 register dw_die_ref context_die;
8202 register dw_die_ref type_die = lookup_type_die (type);
8204 if (type_die == NULL)
8206 type_die = new_die (DW_TAG_enumeration_type,
8207 scope_die_for (type, context_die));
8208 equate_type_number_to_die (type, type_die);
8209 add_name_attribute (type_die, type_tag (type));
8211 else if (! TYPE_SIZE (type))
8214 remove_AT (type_die, DW_AT_declaration);
8216 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
8217 given enum type is incomplete, do not generate the DW_AT_byte_size
8218 attribute or the DW_AT_element_list attribute. */
8219 if (TYPE_SIZE (type))
8223 TREE_ASM_WRITTEN (type) = 1;
8224 add_byte_size_attribute (type_die, type);
8225 if (TYPE_STUB_DECL (type) != NULL_TREE)
8226 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8228 /* If the first reference to this type was as the return type of an
8229 inline function, then it may not have a parent. Fix this now. */
8230 if (type_die->die_parent == NULL)
8231 add_child_die (scope_die_for (type, context_die), type_die);
8233 for (link = TYPE_FIELDS (type);
8234 link != NULL; link = TREE_CHAIN (link))
8236 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
8238 add_name_attribute (enum_die,
8239 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
8241 if (host_integerp (TREE_VALUE (link), 0))
8243 if (tree_int_cst_sgn (TREE_VALUE (link)) < 0)
8244 add_AT_int (enum_die, DW_AT_const_value,
8245 tree_low_cst (TREE_VALUE (link), 0));
8247 add_AT_unsigned (enum_die, DW_AT_const_value,
8248 tree_low_cst (TREE_VALUE (link), 0));
8253 add_AT_flag (type_die, DW_AT_declaration, 1);
8257 /* Generate a DIE to represent either a real live formal parameter decl or to
8258 represent just the type of some formal parameter position in some function
8261 Note that this routine is a bit unusual because its argument may be a
8262 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8263 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8264 node. If it's the former then this function is being called to output a
8265 DIE to represent a formal parameter object (or some inlining thereof). If
8266 it's the latter, then this function is only being called to output a
8267 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8268 argument type of some subprogram type. */
8271 gen_formal_parameter_die (node, context_die)
8273 register dw_die_ref context_die;
8275 register dw_die_ref parm_die
8276 = new_die (DW_TAG_formal_parameter, context_die);
8277 register tree origin;
8279 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8282 origin = decl_ultimate_origin (node);
8284 add_abstract_origin_attribute (parm_die, origin);
8287 add_name_and_src_coords_attributes (parm_die, node);
8288 add_type_attribute (parm_die, TREE_TYPE (node),
8289 TREE_READONLY (node),
8290 TREE_THIS_VOLATILE (node),
8292 if (DECL_ARTIFICIAL (node))
8293 add_AT_flag (parm_die, DW_AT_artificial, 1);
8296 equate_decl_number_to_die (node, parm_die);
8297 if (! DECL_ABSTRACT (node))
8298 add_location_or_const_value_attribute (parm_die, node);
8303 /* We were called with some kind of a ..._TYPE node. */
8304 add_type_attribute (parm_die, node, 0, 0, context_die);
8314 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8315 at the end of an (ANSI prototyped) formal parameters list. */
8318 gen_unspecified_parameters_die (decl_or_type, context_die)
8319 register tree decl_or_type ATTRIBUTE_UNUSED;
8320 register dw_die_ref context_die;
8322 new_die (DW_TAG_unspecified_parameters, context_die);
8325 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8326 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8327 parameters as specified in some function type specification (except for
8328 those which appear as part of a function *definition*). */
8331 gen_formal_types_die (function_or_method_type, context_die)
8332 register tree function_or_method_type;
8333 register dw_die_ref context_die;
8336 register tree formal_type = NULL;
8337 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8340 /* In the case where we are generating a formal types list for a C++
8341 non-static member function type, skip over the first thing on the
8342 TYPE_ARG_TYPES list because it only represents the type of the hidden
8343 `this pointer'. The debugger should be able to figure out (without
8344 being explicitly told) that this non-static member function type takes a
8345 `this pointer' and should be able to figure what the type of that hidden
8346 parameter is from the DW_AT_member attribute of the parent
8347 DW_TAG_subroutine_type DIE. */
8348 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8349 first_parm_type = TREE_CHAIN (first_parm_type);
8352 /* Make our first pass over the list of formal parameter types and output a
8353 DW_TAG_formal_parameter DIE for each one. */
8354 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8356 register dw_die_ref parm_die;
8358 formal_type = TREE_VALUE (link);
8359 if (formal_type == void_type_node)
8362 /* Output a (nameless) DIE to represent the formal parameter itself. */
8363 parm_die = gen_formal_parameter_die (formal_type, context_die);
8364 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8365 && link == first_parm_type)
8366 add_AT_flag (parm_die, DW_AT_artificial, 1);
8369 /* If this function type has an ellipsis, add a
8370 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8371 if (formal_type != void_type_node)
8372 gen_unspecified_parameters_die (function_or_method_type, context_die);
8374 /* Make our second (and final) pass over the list of formal parameter types
8375 and output DIEs to represent those types (as necessary). */
8376 for (link = TYPE_ARG_TYPES (function_or_method_type);
8378 link = TREE_CHAIN (link))
8380 formal_type = TREE_VALUE (link);
8381 if (formal_type == void_type_node)
8384 gen_type_die (formal_type, context_die);
8388 /* We want to generate the DIE for TYPE so that we can generate the
8389 die for MEMBER, which has been defined; we will need to refer back
8390 to the member declaration nested within TYPE. If we're trying to
8391 generate minimal debug info for TYPE, processing TYPE won't do the
8392 trick; we need to attach the member declaration by hand. */
8395 gen_type_die_for_member (type, member, context_die)
8397 dw_die_ref context_die;
8399 gen_type_die (type, context_die);
8401 /* If we're trying to avoid duplicate debug info, we may not have
8402 emitted the member decl for this function. Emit it now. */
8403 if (TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))
8404 && ! lookup_decl_die (member))
8406 if (decl_ultimate_origin (member))
8409 push_decl_scope (type);
8410 if (TREE_CODE (member) == FUNCTION_DECL)
8411 gen_subprogram_die (member, lookup_type_die (type));
8413 gen_variable_die (member, lookup_type_die (type));
8418 /* Generate the DWARF2 info for the "abstract" instance
8419 of a function which we may later generate inlined and/or
8420 out-of-line instances of. */
8423 gen_abstract_function (decl)
8426 register dw_die_ref old_die = lookup_decl_die (decl);
8429 if (old_die && get_AT_unsigned (old_die, DW_AT_inline))
8430 /* We've already generated the abstract instance. */
8433 save_fn = current_function_decl;
8434 current_function_decl = decl;
8436 set_decl_abstract_flags (decl, 1);
8437 dwarf2out_decl (decl);
8438 set_decl_abstract_flags (decl, 0);
8440 current_function_decl = save_fn;
8443 /* Generate a DIE to represent a declared function (either file-scope or
8447 gen_subprogram_die (decl, context_die)
8449 register dw_die_ref context_die;
8451 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8452 register tree origin = decl_ultimate_origin (decl);
8453 register dw_die_ref subr_die;
8454 register rtx fp_reg;
8455 register tree fn_arg_types;
8456 register tree outer_scope;
8457 register dw_die_ref old_die = lookup_decl_die (decl);
8458 register int declaration = (current_function_decl != decl
8459 || class_scope_p (context_die));
8461 /* Note that it is possible to have both DECL_ABSTRACT and `declaration'
8462 be true, if we started to generate the abstract instance of an inline,
8463 decided to output its containing class, and proceeded to emit the
8464 declaration of the inline from the member list for the class. In that
8465 case, `declaration' takes priority; we'll get back to the abstract
8466 instance when we're done with the class. */
8468 /* The class-scope declaration DIE must be the primary DIE. */
8469 if (origin && declaration && class_scope_p (context_die))
8478 if (declaration && ! local_scope_p (context_die))
8481 /* Fixup die_parent for the abstract instance of a nested
8483 if (old_die && old_die->die_parent == NULL)
8484 add_child_die (context_die, old_die);
8486 subr_die = new_die (DW_TAG_subprogram, context_die);
8487 add_abstract_origin_attribute (subr_die, origin);
8489 else if (old_die && DECL_ABSTRACT (decl)
8490 && get_AT_unsigned (old_die, DW_AT_inline))
8492 /* This must be a redefinition of an extern inline function.
8493 We can just reuse the old die here. */
8496 /* Clear out the inlined attribute and parm types. */
8497 remove_AT (subr_die, DW_AT_inline);
8498 remove_children (subr_die);
8502 register unsigned file_index
8503 = lookup_filename (DECL_SOURCE_FILE (decl));
8505 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8507 /* ??? This can happen if there is a bug in the program, for
8508 instance, if it has duplicate function definitions. Ideally,
8509 we should detect this case and ignore it. For now, if we have
8510 already reported an error, any error at all, then assume that
8511 we got here because of a input error, not a dwarf2 bug. */
8517 /* If the definition comes from the same place as the declaration,
8518 maybe use the old DIE. We always want the DIE for this function
8519 that has the *_pc attributes to be under comp_unit_die so the
8520 debugger can find it. For inlines, that is the concrete instance,
8521 so we can use the old DIE here. For non-inline methods, we want a
8522 specification DIE at toplevel, so we need a new DIE. For local
8523 class methods, this doesn't apply; we just use the old DIE. */
8524 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8525 || context_die == NULL)
8526 && (DECL_ARTIFICIAL (decl)
8527 || (get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8528 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8529 == (unsigned)DECL_SOURCE_LINE (decl)))))
8533 /* Clear out the declaration attribute and the parm types. */
8534 remove_AT (subr_die, DW_AT_declaration);
8535 remove_children (subr_die);
8539 subr_die = new_die (DW_TAG_subprogram, context_die);
8540 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8541 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8542 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8543 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8544 != (unsigned)DECL_SOURCE_LINE (decl))
8546 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8551 subr_die = new_die (DW_TAG_subprogram, context_die);
8553 if (TREE_PUBLIC (decl))
8554 add_AT_flag (subr_die, DW_AT_external, 1);
8556 add_name_and_src_coords_attributes (subr_die, decl);
8557 if (debug_info_level > DINFO_LEVEL_TERSE)
8559 register tree type = TREE_TYPE (decl);
8561 add_prototyped_attribute (subr_die, type);
8562 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8565 add_pure_or_virtual_attribute (subr_die, decl);
8566 if (DECL_ARTIFICIAL (decl))
8567 add_AT_flag (subr_die, DW_AT_artificial, 1);
8568 if (TREE_PROTECTED (decl))
8569 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8570 else if (TREE_PRIVATE (decl))
8571 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8577 add_AT_flag (subr_die, DW_AT_declaration, 1);
8579 /* The first time we see a member function, it is in the context of
8580 the class to which it belongs. We make sure of this by emitting
8581 the class first. The next time is the definition, which is
8582 handled above. The two may come from the same source text. */
8583 if (DECL_CONTEXT (decl) || DECL_ABSTRACT (decl))
8584 equate_decl_number_to_die (decl, subr_die);
8586 else if (DECL_ABSTRACT (decl))
8588 if (DECL_INLINE (decl) && !flag_no_inline)
8590 /* ??? Checking DECL_DEFER_OUTPUT is correct for static
8591 inline functions, but not for extern inline functions.
8592 We can't get this completely correct because information
8593 about whether the function was declared inline is not
8595 if (DECL_DEFER_OUTPUT (decl))
8596 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8598 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8601 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined);
8603 equate_decl_number_to_die (decl, subr_die);
8605 else if (!DECL_EXTERNAL (decl))
8607 if (origin == NULL_TREE)
8608 equate_decl_number_to_die (decl, subr_die);
8610 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8611 current_funcdef_number);
8612 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8613 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8614 current_funcdef_number);
8615 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8617 add_pubname (decl, subr_die);
8618 add_arange (decl, subr_die);
8620 #ifdef MIPS_DEBUGGING_INFO
8621 /* Add a reference to the FDE for this routine. */
8622 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8625 /* Define the "frame base" location for this routine. We use the
8626 frame pointer or stack pointer registers, since the RTL for local
8627 variables is relative to one of them. */
8629 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8630 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8633 /* ??? This fails for nested inline functions, because context_display
8634 is not part of the state saved/restored for inline functions. */
8635 if (current_function_needs_context)
8636 add_AT_location_description (subr_die, DW_AT_static_link,
8637 lookup_static_chain (decl));
8641 /* Now output descriptions of the arguments for this function. This gets
8642 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8643 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8644 `...' at the end of the formal parameter list. In order to find out if
8645 there was a trailing ellipsis or not, we must instead look at the type
8646 associated with the FUNCTION_DECL. This will be a node of type
8647 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8648 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8649 an ellipsis at the end. */
8651 /* In the case where we are describing a mere function declaration, all we
8652 need to do here (and all we *can* do here) is to describe the *types* of
8653 its formal parameters. */
8654 if (debug_info_level <= DINFO_LEVEL_TERSE)
8656 else if (declaration)
8657 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8660 /* Generate DIEs to represent all known formal parameters */
8661 register tree arg_decls = DECL_ARGUMENTS (decl);
8664 /* When generating DIEs, generate the unspecified_parameters DIE
8665 instead if we come across the arg "__builtin_va_alist" */
8666 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8667 if (TREE_CODE (parm) == PARM_DECL)
8669 if (DECL_NAME (parm)
8670 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8671 "__builtin_va_alist"))
8672 gen_unspecified_parameters_die (parm, subr_die);
8674 gen_decl_die (parm, subr_die);
8677 /* Decide whether we need a unspecified_parameters DIE at the end.
8678 There are 2 more cases to do this for: 1) the ansi ... declaration -
8679 this is detectable when the end of the arg list is not a
8680 void_type_node 2) an unprototyped function declaration (not a
8681 definition). This just means that we have no info about the
8682 parameters at all. */
8683 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8684 if (fn_arg_types != NULL)
8686 /* this is the prototyped case, check for ... */
8687 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8688 gen_unspecified_parameters_die (decl, subr_die);
8690 else if (DECL_INITIAL (decl) == NULL_TREE)
8691 gen_unspecified_parameters_die (decl, subr_die);
8694 /* Output Dwarf info for all of the stuff within the body of the function
8695 (if it has one - it may be just a declaration). */
8696 outer_scope = DECL_INITIAL (decl);
8698 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8699 node created to represent a function. This outermost BLOCK actually
8700 represents the outermost binding contour for the function, i.e. the
8701 contour in which the function's formal parameters and labels get
8702 declared. Curiously, it appears that the front end doesn't actually
8703 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8704 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8705 list for the function instead.) The BLOCK_VARS list for the
8706 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8707 the function however, and we output DWARF info for those in
8708 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8709 node representing the function's outermost pair of curly braces, and
8710 any blocks used for the base and member initializers of a C++
8711 constructor function. */
8712 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8714 current_function_has_inlines = 0;
8715 decls_for_scope (outer_scope, subr_die, 0);
8717 #if 0 && defined (MIPS_DEBUGGING_INFO)
8718 if (current_function_has_inlines)
8720 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8721 if (! comp_unit_has_inlines)
8723 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8724 comp_unit_has_inlines = 1;
8731 /* Generate a DIE to represent a declared data object. */
8734 gen_variable_die (decl, context_die)
8736 register dw_die_ref context_die;
8738 register tree origin = decl_ultimate_origin (decl);
8739 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8741 dw_die_ref old_die = lookup_decl_die (decl);
8742 int declaration = (DECL_EXTERNAL (decl)
8743 || class_scope_p (context_die));
8746 add_abstract_origin_attribute (var_die, origin);
8747 /* Loop unrolling can create multiple blocks that refer to the same
8748 static variable, so we must test for the DW_AT_declaration flag. */
8749 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8750 copy decls and set the DECL_ABSTRACT flag on them instead of
8752 else if (old_die && TREE_STATIC (decl)
8753 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8755 /* This is a definition of a C++ class level static. */
8756 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8757 if (DECL_NAME (decl))
8759 register unsigned file_index
8760 = lookup_filename (DECL_SOURCE_FILE (decl));
8762 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8763 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8765 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8766 != (unsigned)DECL_SOURCE_LINE (decl))
8768 add_AT_unsigned (var_die, DW_AT_decl_line,
8769 DECL_SOURCE_LINE (decl));
8774 add_name_and_src_coords_attributes (var_die, decl);
8775 add_type_attribute (var_die, TREE_TYPE (decl),
8776 TREE_READONLY (decl),
8777 TREE_THIS_VOLATILE (decl), context_die);
8779 if (TREE_PUBLIC (decl))
8780 add_AT_flag (var_die, DW_AT_external, 1);
8782 if (DECL_ARTIFICIAL (decl))
8783 add_AT_flag (var_die, DW_AT_artificial, 1);
8785 if (TREE_PROTECTED (decl))
8786 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8788 else if (TREE_PRIVATE (decl))
8789 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8793 add_AT_flag (var_die, DW_AT_declaration, 1);
8795 if (class_scope_p (context_die) || DECL_ABSTRACT (decl))
8796 equate_decl_number_to_die (decl, var_die);
8798 if (! declaration && ! DECL_ABSTRACT (decl))
8800 add_location_or_const_value_attribute (var_die, decl);
8801 add_pubname (decl, var_die);
8805 /* Generate a DIE to represent a label identifier. */
8808 gen_label_die (decl, context_die)
8810 register dw_die_ref context_die;
8812 register tree origin = decl_ultimate_origin (decl);
8813 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8815 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8816 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8819 add_abstract_origin_attribute (lbl_die, origin);
8821 add_name_and_src_coords_attributes (lbl_die, decl);
8823 if (DECL_ABSTRACT (decl))
8824 equate_decl_number_to_die (decl, lbl_die);
8827 insn = DECL_RTL (decl);
8829 /* Deleted labels are programmer specified labels which have been
8830 eliminated because of various optimisations. We still emit them
8831 here so that it is possible to put breakpoints on them. */
8832 if (GET_CODE (insn) == CODE_LABEL
8833 || ((GET_CODE (insn) == NOTE
8834 && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)))
8836 /* When optimization is enabled (via -O) some parts of the compiler
8837 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8838 represent source-level labels which were explicitly declared by
8839 the user. This really shouldn't be happening though, so catch
8840 it if it ever does happen. */
8841 if (INSN_DELETED_P (insn))
8844 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8845 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8846 (unsigned) INSN_UID (insn));
8847 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8852 /* Generate a DIE for a lexical block. */
8855 gen_lexical_block_die (stmt, context_die, depth)
8857 register dw_die_ref context_die;
8860 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8861 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8863 if (! BLOCK_ABSTRACT (stmt))
8865 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8866 BLOCK_NUMBER (stmt));
8867 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8868 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
8869 BLOCK_NUMBER (stmt));
8870 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8873 decls_for_scope (stmt, stmt_die, depth);
8876 /* Generate a DIE for an inlined subprogram. */
8879 gen_inlined_subroutine_die (stmt, context_die, depth)
8881 register dw_die_ref context_die;
8884 if (! BLOCK_ABSTRACT (stmt))
8886 register dw_die_ref subr_die
8887 = new_die (DW_TAG_inlined_subroutine, context_die);
8888 register tree decl = block_ultimate_origin (stmt);
8889 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8891 /* Emit info for the abstract instance first, if we haven't yet. */
8892 gen_abstract_function (decl);
8894 add_abstract_origin_attribute (subr_die, decl);
8895 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8896 BLOCK_NUMBER (stmt));
8897 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8898 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
8899 BLOCK_NUMBER (stmt));
8900 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8901 decls_for_scope (stmt, subr_die, depth);
8902 current_function_has_inlines = 1;
8906 /* Generate a DIE for a field in a record, or structure. */
8909 gen_field_die (decl, context_die)
8911 register dw_die_ref context_die;
8913 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8915 add_name_and_src_coords_attributes (decl_die, decl);
8916 add_type_attribute (decl_die, member_declared_type (decl),
8917 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8920 /* If this is a bit field... */
8921 if (DECL_BIT_FIELD_TYPE (decl))
8923 add_byte_size_attribute (decl_die, decl);
8924 add_bit_size_attribute (decl_die, decl);
8925 add_bit_offset_attribute (decl_die, decl);
8928 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8929 add_data_member_location_attribute (decl_die, decl);
8931 if (DECL_ARTIFICIAL (decl))
8932 add_AT_flag (decl_die, DW_AT_artificial, 1);
8934 if (TREE_PROTECTED (decl))
8935 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8937 else if (TREE_PRIVATE (decl))
8938 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8942 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8943 Use modified_type_die instead.
8944 We keep this code here just in case these types of DIEs may be needed to
8945 represent certain things in other languages (e.g. Pascal) someday. */
8947 gen_pointer_type_die (type, context_die)
8949 register dw_die_ref context_die;
8951 register dw_die_ref ptr_die
8952 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8954 equate_type_number_to_die (type, ptr_die);
8955 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8956 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8959 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8960 Use modified_type_die instead.
8961 We keep this code here just in case these types of DIEs may be needed to
8962 represent certain things in other languages (e.g. Pascal) someday. */
8964 gen_reference_type_die (type, context_die)
8966 register dw_die_ref context_die;
8968 register dw_die_ref ref_die
8969 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8971 equate_type_number_to_die (type, ref_die);
8972 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8973 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8977 /* Generate a DIE for a pointer to a member type. */
8979 gen_ptr_to_mbr_type_die (type, context_die)
8981 register dw_die_ref context_die;
8983 register dw_die_ref ptr_die
8984 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8986 equate_type_number_to_die (type, ptr_die);
8987 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8988 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8989 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8992 /* Generate the DIE for the compilation unit. */
8995 gen_compile_unit_die (filename)
8996 register const char *filename;
8998 register dw_die_ref die;
9000 const char *wd = getpwd ();
9003 die = new_die (DW_TAG_compile_unit, NULL);
9004 add_name_attribute (die, filename);
9006 if (wd != NULL && filename[0] != DIR_SEPARATOR)
9007 add_AT_string (die, DW_AT_comp_dir, wd);
9009 sprintf (producer, "%s %s", language_string, version_string);
9011 #ifdef MIPS_DEBUGGING_INFO
9012 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
9013 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
9014 not appear in the producer string, the debugger reaches the conclusion
9015 that the object file is stripped and has no debugging information.
9016 To get the MIPS/SGI debugger to believe that there is debugging
9017 information in the object file, we add a -g to the producer string. */
9018 if (debug_info_level > DINFO_LEVEL_TERSE)
9019 strcat (producer, " -g");
9022 add_AT_string (die, DW_AT_producer, producer);
9024 if (strcmp (language_string, "GNU C++") == 0)
9025 language = DW_LANG_C_plus_plus;
9026 else if (strcmp (language_string, "GNU Ada") == 0)
9027 language = DW_LANG_Ada83;
9028 else if (strcmp (language_string, "GNU F77") == 0)
9029 language = DW_LANG_Fortran77;
9030 else if (strcmp (language_string, "GNU Pascal") == 0)
9031 language = DW_LANG_Pascal83;
9032 else if (flag_traditional)
9033 language = DW_LANG_C;
9035 language = DW_LANG_C89;
9037 add_AT_unsigned (die, DW_AT_language, language);
9042 /* Generate a DIE for a string type. */
9045 gen_string_type_die (type, context_die)
9047 register dw_die_ref context_die;
9049 register dw_die_ref type_die
9050 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
9052 equate_type_number_to_die (type, type_die);
9054 /* Fudge the string length attribute for now. */
9056 /* TODO: add string length info.
9057 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
9058 bound_representation (upper_bound, 0, 'u'); */
9061 /* Generate the DIE for a base class. */
9064 gen_inheritance_die (binfo, context_die)
9065 register tree binfo;
9066 register dw_die_ref context_die;
9068 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
9070 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
9071 add_data_member_location_attribute (die, binfo);
9073 if (TREE_VIA_VIRTUAL (binfo))
9074 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
9075 if (TREE_VIA_PUBLIC (binfo))
9076 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
9077 else if (TREE_VIA_PROTECTED (binfo))
9078 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
9081 /* Generate a DIE for a class member. */
9084 gen_member_die (type, context_die)
9086 register dw_die_ref context_die;
9088 register tree member;
9091 /* If this is not an incomplete type, output descriptions of each of its
9092 members. Note that as we output the DIEs necessary to represent the
9093 members of this record or union type, we will also be trying to output
9094 DIEs to represent the *types* of those members. However the `type'
9095 function (above) will specifically avoid generating type DIEs for member
9096 types *within* the list of member DIEs for this (containing) type execpt
9097 for those types (of members) which are explicitly marked as also being
9098 members of this (containing) type themselves. The g++ front- end can
9099 force any given type to be treated as a member of some other
9100 (containing) type by setting the TYPE_CONTEXT of the given (member) type
9101 to point to the TREE node representing the appropriate (containing)
9104 /* First output info about the base classes. */
9105 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
9107 register tree bases = TYPE_BINFO_BASETYPES (type);
9108 register int n_bases = TREE_VEC_LENGTH (bases);
9111 for (i = 0; i < n_bases; i++)
9112 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
9115 /* Now output info about the data members and type members. */
9116 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
9118 /* If we thought we were generating minimal debug info for TYPE
9119 and then changed our minds, some of the member declarations
9120 may have already been defined. Don't define them again, but
9121 do put them in the right order. */
9123 child = lookup_decl_die (member);
9125 splice_child_die (context_die, child);
9127 gen_decl_die (member, context_die);
9130 /* Now output info about the function members (if any). */
9131 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
9133 child = lookup_decl_die (member);
9135 splice_child_die (context_die, child);
9137 gen_decl_die (member, context_die);
9141 /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG
9142 is set, we pretend that the type was never defined, so we only get the
9143 member DIEs needed by later specification DIEs. */
9146 gen_struct_or_union_type_die (type, context_die)
9148 register dw_die_ref context_die;
9150 register dw_die_ref type_die = lookup_type_die (type);
9151 register dw_die_ref scope_die = 0;
9152 register int nested = 0;
9153 int complete = (TYPE_SIZE (type)
9154 && (! TYPE_STUB_DECL (type)
9155 || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))));
9157 if (type_die && ! complete)
9160 if (TYPE_CONTEXT (type) != NULL_TREE
9161 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)))
9164 scope_die = scope_die_for (type, context_die);
9166 if (! type_die || (nested && scope_die == comp_unit_die))
9167 /* First occurrence of type or toplevel definition of nested class. */
9169 register dw_die_ref old_die = type_die;
9171 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
9172 ? DW_TAG_structure_type : DW_TAG_union_type,
9174 equate_type_number_to_die (type, type_die);
9175 add_name_attribute (type_die, type_tag (type));
9177 add_AT_die_ref (type_die, DW_AT_specification, old_die);
9180 remove_AT (type_die, DW_AT_declaration);
9182 /* If this type has been completed, then give it a byte_size attribute and
9183 then give a list of members. */
9186 /* Prevent infinite recursion in cases where the type of some member of
9187 this type is expressed in terms of this type itself. */
9188 TREE_ASM_WRITTEN (type) = 1;
9189 add_byte_size_attribute (type_die, type);
9190 if (TYPE_STUB_DECL (type) != NULL_TREE)
9191 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
9193 /* If the first reference to this type was as the return type of an
9194 inline function, then it may not have a parent. Fix this now. */
9195 if (type_die->die_parent == NULL)
9196 add_child_die (scope_die, type_die);
9198 push_decl_scope (type);
9199 gen_member_die (type, type_die);
9202 /* GNU extension: Record what type our vtable lives in. */
9203 if (TYPE_VFIELD (type))
9205 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
9207 gen_type_die (vtype, context_die);
9208 add_AT_die_ref (type_die, DW_AT_containing_type,
9209 lookup_type_die (vtype));
9214 add_AT_flag (type_die, DW_AT_declaration, 1);
9216 /* We don't need to do this for function-local types. */
9217 if (! decl_function_context (TYPE_STUB_DECL (type)))
9218 add_incomplete_type (type);
9222 /* Generate a DIE for a subroutine _type_. */
9225 gen_subroutine_type_die (type, context_die)
9227 register dw_die_ref context_die;
9229 register tree return_type = TREE_TYPE (type);
9230 register dw_die_ref subr_die
9231 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
9233 equate_type_number_to_die (type, subr_die);
9234 add_prototyped_attribute (subr_die, type);
9235 add_type_attribute (subr_die, return_type, 0, 0, context_die);
9236 gen_formal_types_die (type, subr_die);
9239 /* Generate a DIE for a type definition */
9242 gen_typedef_die (decl, context_die)
9244 register dw_die_ref context_die;
9246 register dw_die_ref type_die;
9247 register tree origin;
9249 if (TREE_ASM_WRITTEN (decl))
9251 TREE_ASM_WRITTEN (decl) = 1;
9253 type_die = new_die (DW_TAG_typedef, context_die);
9254 origin = decl_ultimate_origin (decl);
9256 add_abstract_origin_attribute (type_die, origin);
9260 add_name_and_src_coords_attributes (type_die, decl);
9261 if (DECL_ORIGINAL_TYPE (decl))
9263 type = DECL_ORIGINAL_TYPE (decl);
9264 equate_type_number_to_die (TREE_TYPE (decl), type_die);
9267 type = TREE_TYPE (decl);
9268 add_type_attribute (type_die, type, TREE_READONLY (decl),
9269 TREE_THIS_VOLATILE (decl), context_die);
9272 if (DECL_ABSTRACT (decl))
9273 equate_decl_number_to_die (decl, type_die);
9276 /* Generate a type description DIE. */
9279 gen_type_die (type, context_die)
9281 register dw_die_ref context_die;
9285 if (type == NULL_TREE || type == error_mark_node)
9288 /* We are going to output a DIE to represent the unqualified version of
9289 this type (i.e. without any const or volatile qualifiers) so get the
9290 main variant (i.e. the unqualified version) of this type now. */
9291 type = type_main_variant (type);
9293 if (TREE_ASM_WRITTEN (type))
9296 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9297 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
9299 TREE_ASM_WRITTEN (type) = 1;
9300 gen_decl_die (TYPE_NAME (type), context_die);
9304 switch (TREE_CODE (type))
9310 case REFERENCE_TYPE:
9311 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
9312 ensures that the gen_type_die recursion will terminate even if the
9313 type is recursive. Recursive types are possible in Ada. */
9314 /* ??? We could perhaps do this for all types before the switch
9316 TREE_ASM_WRITTEN (type) = 1;
9318 /* For these types, all that is required is that we output a DIE (or a
9319 set of DIEs) to represent the "basis" type. */
9320 gen_type_die (TREE_TYPE (type), context_die);
9324 /* This code is used for C++ pointer-to-data-member types.
9325 Output a description of the relevant class type. */
9326 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
9328 /* Output a description of the type of the object pointed to. */
9329 gen_type_die (TREE_TYPE (type), context_die);
9331 /* Now output a DIE to represent this pointer-to-data-member type
9333 gen_ptr_to_mbr_type_die (type, context_die);
9337 gen_type_die (TYPE_DOMAIN (type), context_die);
9338 gen_set_type_die (type, context_die);
9342 gen_type_die (TREE_TYPE (type), context_die);
9343 abort (); /* No way to represent these in Dwarf yet! */
9347 /* Force out return type (in case it wasn't forced out already). */
9348 gen_type_die (TREE_TYPE (type), context_die);
9349 gen_subroutine_type_die (type, context_die);
9353 /* Force out return type (in case it wasn't forced out already). */
9354 gen_type_die (TREE_TYPE (type), context_die);
9355 gen_subroutine_type_die (type, context_die);
9359 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9361 gen_type_die (TREE_TYPE (type), context_die);
9362 gen_string_type_die (type, context_die);
9365 gen_array_type_die (type, context_die);
9369 gen_type_die (TYPE_DEBUG_REPRESENTATION_TYPE (type), context_die);
9375 case QUAL_UNION_TYPE:
9376 /* If this is a nested type whose containing class hasn't been
9377 written out yet, writing it out will cover this one, too.
9378 This does not apply to instantiations of member class templates;
9379 they need to be added to the containing class as they are
9380 generated. FIXME: This hurts the idea of combining type decls
9381 from multiple TUs, since we can't predict what set of template
9382 instantiations we'll get. */
9383 if (TYPE_CONTEXT (type)
9384 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9385 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9387 gen_type_die (TYPE_CONTEXT (type), context_die);
9389 if (TREE_ASM_WRITTEN (type))
9392 /* If that failed, attach ourselves to the stub. */
9393 push_decl_scope (TYPE_CONTEXT (type));
9394 context_die = lookup_type_die (TYPE_CONTEXT (type));
9400 if (TREE_CODE (type) == ENUMERAL_TYPE)
9401 gen_enumeration_type_die (type, context_die);
9403 gen_struct_or_union_type_die (type, context_die);
9408 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9409 it up if it is ever completed. gen_*_type_die will set it for us
9410 when appropriate. */
9419 /* No DIEs needed for fundamental types. */
9423 /* No Dwarf representation currently defined. */
9430 TREE_ASM_WRITTEN (type) = 1;
9433 /* Generate a DIE for a tagged type instantiation. */
9436 gen_tagged_type_instantiation_die (type, context_die)
9438 register dw_die_ref context_die;
9440 if (type == NULL_TREE || type == error_mark_node)
9443 /* We are going to output a DIE to represent the unqualified version of
9444 this type (i.e. without any const or volatile qualifiers) so make sure
9445 that we have the main variant (i.e. the unqualified version) of this
9447 if (type != type_main_variant (type))
9450 /* Do not check TREE_ASM_WRITTEN (type) as it may not be set if this is
9451 an instance of an unresolved type. */
9453 switch (TREE_CODE (type))
9459 gen_inlined_enumeration_type_die (type, context_die);
9463 gen_inlined_structure_type_die (type, context_die);
9467 case QUAL_UNION_TYPE:
9468 gen_inlined_union_type_die (type, context_die);
9476 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9477 things which are local to the given block. */
9480 gen_block_die (stmt, context_die, depth)
9482 register dw_die_ref context_die;
9485 register int must_output_die = 0;
9486 register tree origin;
9488 register enum tree_code origin_code;
9490 /* Ignore blocks never really used to make RTL. */
9492 if (stmt == NULL_TREE || !TREE_USED (stmt)
9493 || (!TREE_ASM_WRITTEN (stmt) && !BLOCK_ABSTRACT (stmt)))
9496 /* Determine the "ultimate origin" of this block. This block may be an
9497 inlined instance of an inlined instance of inline function, so we have
9498 to trace all of the way back through the origin chain to find out what
9499 sort of node actually served as the original seed for the creation of
9500 the current block. */
9501 origin = block_ultimate_origin (stmt);
9502 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9504 /* Determine if we need to output any Dwarf DIEs at all to represent this
9506 if (origin_code == FUNCTION_DECL)
9507 /* The outer scopes for inlinings *must* always be represented. We
9508 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9509 must_output_die = 1;
9512 /* In the case where the current block represents an inlining of the
9513 "body block" of an inline function, we must *NOT* output any DIE for
9514 this block because we have already output a DIE to represent the
9515 whole inlined function scope and the "body block" of any function
9516 doesn't really represent a different scope according to ANSI C
9517 rules. So we check here to make sure that this block does not
9518 represent a "body block inlining" before trying to set the
9519 `must_output_die' flag. */
9520 if (! is_body_block (origin ? origin : stmt))
9522 /* Determine if this block directly contains any "significant"
9523 local declarations which we will need to output DIEs for. */
9524 if (debug_info_level > DINFO_LEVEL_TERSE)
9525 /* We are not in terse mode so *any* local declaration counts
9526 as being a "significant" one. */
9527 must_output_die = (BLOCK_VARS (stmt) != NULL);
9529 /* We are in terse mode, so only local (nested) function
9530 definitions count as "significant" local declarations. */
9531 for (decl = BLOCK_VARS (stmt);
9532 decl != NULL; decl = TREE_CHAIN (decl))
9533 if (TREE_CODE (decl) == FUNCTION_DECL
9534 && DECL_INITIAL (decl))
9536 must_output_die = 1;
9542 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9543 DIE for any block which contains no significant local declarations at
9544 all. Rather, in such cases we just call `decls_for_scope' so that any
9545 needed Dwarf info for any sub-blocks will get properly generated. Note
9546 that in terse mode, our definition of what constitutes a "significant"
9547 local declaration gets restricted to include only inlined function
9548 instances and local (nested) function definitions. */
9549 if (must_output_die)
9551 if (origin_code == FUNCTION_DECL)
9552 gen_inlined_subroutine_die (stmt, context_die, depth);
9554 gen_lexical_block_die (stmt, context_die, depth);
9557 decls_for_scope (stmt, context_die, depth);
9560 /* Generate all of the decls declared within a given scope and (recursively)
9561 all of its sub-blocks. */
9564 decls_for_scope (stmt, context_die, depth)
9566 register dw_die_ref context_die;
9570 register tree subblocks;
9572 /* Ignore blocks never really used to make RTL. */
9573 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9576 /* Output the DIEs to represent all of the data objects and typedefs
9577 declared directly within this block but not within any nested
9578 sub-blocks. Also, nested function and tag DIEs have been
9579 generated with a parent of NULL; fix that up now. */
9580 for (decl = BLOCK_VARS (stmt);
9581 decl != NULL; decl = TREE_CHAIN (decl))
9583 register dw_die_ref die;
9585 if (TREE_CODE (decl) == FUNCTION_DECL)
9586 die = lookup_decl_die (decl);
9587 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9588 die = lookup_type_die (TREE_TYPE (decl));
9592 if (die != NULL && die->die_parent == NULL)
9593 add_child_die (context_die, die);
9595 gen_decl_die (decl, context_die);
9598 /* Output the DIEs to represent all sub-blocks (and the items declared
9599 therein) of this block. */
9600 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9602 subblocks = BLOCK_CHAIN (subblocks))
9603 gen_block_die (subblocks, context_die, depth + 1);
9606 /* Is this a typedef we can avoid emitting? */
9609 is_redundant_typedef (decl)
9612 if (TYPE_DECL_IS_STUB (decl))
9615 if (DECL_ARTIFICIAL (decl)
9616 && DECL_CONTEXT (decl)
9617 && is_tagged_type (DECL_CONTEXT (decl))
9618 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9619 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9620 /* Also ignore the artificial member typedef for the class name. */
9626 /* Generate Dwarf debug information for a decl described by DECL. */
9629 gen_decl_die (decl, context_die)
9631 register dw_die_ref context_die;
9633 register tree origin;
9635 if (TREE_CODE (decl) == ERROR_MARK)
9638 /* If this ..._DECL node is marked to be ignored, then ignore it. */
9639 if (DECL_IGNORED_P (decl))
9642 switch (TREE_CODE (decl))
9645 /* The individual enumerators of an enum type get output when we output
9646 the Dwarf representation of the relevant enum type itself. */
9650 /* Don't output any DIEs to represent mere function declarations,
9651 unless they are class members or explicit block externs. */
9652 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9653 && (current_function_decl == NULL_TREE || DECL_ARTIFICIAL (decl)))
9656 /* If we're emitting an out-of-line copy of an inline function,
9657 emit info for the abstract instance and set up to refer to it. */
9658 if (DECL_INLINE (decl) && ! DECL_ABSTRACT (decl)
9659 && ! class_scope_p (context_die))
9661 gen_abstract_function (decl);
9662 set_decl_origin_self (decl);
9665 if (debug_info_level > DINFO_LEVEL_TERSE)
9667 /* Before we describe the FUNCTION_DECL itself, make sure that we
9668 have described its return type. */
9669 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9671 /* And its virtual context. */
9672 if (DECL_VINDEX (decl) != NULL_TREE)
9673 gen_type_die (DECL_CONTEXT (decl), context_die);
9675 /* And its containing type. */
9676 origin = decl_class_context (decl);
9677 if (origin != NULL_TREE)
9678 gen_type_die_for_member (origin, decl, context_die);
9681 /* Now output a DIE to represent the function itself. */
9682 gen_subprogram_die (decl, context_die);
9686 /* If we are in terse mode, don't generate any DIEs to represent any
9688 if (debug_info_level <= DINFO_LEVEL_TERSE)
9691 /* In the special case of a TYPE_DECL node representing the
9692 declaration of some type tag, if the given TYPE_DECL is marked as
9693 having been instantiated from some other (original) TYPE_DECL node
9694 (e.g. one which was generated within the original definition of an
9695 inline function) we have to generate a special (abbreviated)
9696 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9698 if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE)
9700 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9704 if (is_redundant_typedef (decl))
9705 gen_type_die (TREE_TYPE (decl), context_die);
9707 /* Output a DIE to represent the typedef itself. */
9708 gen_typedef_die (decl, context_die);
9712 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9713 gen_label_die (decl, context_die);
9717 /* If we are in terse mode, don't generate any DIEs to represent any
9718 variable declarations or definitions. */
9719 if (debug_info_level <= DINFO_LEVEL_TERSE)
9722 /* Output any DIEs that are needed to specify the type of this data
9724 gen_type_die (TREE_TYPE (decl), context_die);
9726 /* And its containing type. */
9727 origin = decl_class_context (decl);
9728 if (origin != NULL_TREE)
9729 gen_type_die_for_member (origin, decl, context_die);
9731 /* Now output the DIE to represent the data object itself. This gets
9732 complicated because of the possibility that the VAR_DECL really
9733 represents an inlined instance of a formal parameter for an inline
9735 origin = decl_ultimate_origin (decl);
9736 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9737 gen_formal_parameter_die (decl, context_die);
9739 gen_variable_die (decl, context_die);
9743 /* Ignore the nameless fields that are used to skip bits, but
9744 handle C++ anonymous unions. */
9745 if (DECL_NAME (decl) != NULL_TREE
9746 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9748 gen_type_die (member_declared_type (decl), context_die);
9749 gen_field_die (decl, context_die);
9754 gen_type_die (TREE_TYPE (decl), context_die);
9755 gen_formal_parameter_die (decl, context_die);
9758 case NAMESPACE_DECL:
9759 /* Ignore for now. */
9767 /* Add Ada "use" clause information for SGI Workshop debugger. */
9770 dwarf2out_add_library_unit_info (filename, context_list)
9771 const char *filename;
9772 const char *context_list;
9774 unsigned int file_index;
9776 if (filename != NULL)
9778 dw_die_ref unit_die = new_die (DW_TAG_module, comp_unit_die);
9779 tree context_list_decl
9780 = build_decl (LABEL_DECL, get_identifier (context_list),
9783 TREE_PUBLIC (context_list_decl) = TRUE;
9784 add_name_attribute (unit_die, context_list);
9785 file_index = lookup_filename (filename);
9786 add_AT_unsigned (unit_die, DW_AT_decl_file, file_index);
9787 add_pubname (context_list_decl, unit_die);
9791 /* Write the debugging output for DECL. */
9794 dwarf2out_decl (decl)
9797 register dw_die_ref context_die = comp_unit_die;
9799 if (TREE_CODE (decl) == ERROR_MARK)
9802 /* If this ..._DECL node is marked to be ignored, then ignore it. */
9803 if (DECL_IGNORED_P (decl))
9806 switch (TREE_CODE (decl))
9809 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9810 builtin function. Explicit programmer-supplied declarations of
9811 these same functions should NOT be ignored however. */
9812 if (DECL_EXTERNAL (decl) && DECL_BUILT_IN (decl))
9815 /* What we would really like to do here is to filter out all mere
9816 file-scope declarations of file-scope functions which are never
9817 referenced later within this translation unit (and keep all of ones
9818 that *are* referenced later on) but we aren't clairvoyant, so we have
9819 no idea which functions will be referenced in the future (i.e. later
9820 on within the current translation unit). So here we just ignore all
9821 file-scope function declarations which are not also definitions. If
9822 and when the debugger needs to know something about these functions,
9823 it will have to hunt around and find the DWARF information associated
9824 with the definition of the function. Note that we can't just check
9825 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9826 definitions and which ones represent mere declarations. We have to
9827 check `DECL_INITIAL' instead. That's because the C front-end
9828 supports some weird semantics for "extern inline" function
9829 definitions. These can get inlined within the current translation
9830 unit (an thus, we need to generate DWARF info for their abstract
9831 instances so that the DWARF info for the concrete inlined instances
9832 can have something to refer to) but the compiler never generates any
9833 out-of-lines instances of such things (despite the fact that they
9834 *are* definitions). The important point is that the C front-end
9835 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9836 to generate DWARF for them anyway. Note that the C++ front-end also
9837 plays some similar games for inline function definitions appearing
9838 within include files which also contain
9839 `#pragma interface' pragmas. */
9840 if (DECL_INITIAL (decl) == NULL_TREE)
9843 /* If we're a nested function, initially use a parent of NULL; if we're
9844 a plain function, this will be fixed up in decls_for_scope. If
9845 we're a method, it will be ignored, since we already have a DIE. */
9846 if (decl_function_context (decl))
9852 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9853 declaration and if the declaration was never even referenced from
9854 within this entire compilation unit. We suppress these DIEs in
9855 order to save space in the .debug section (by eliminating entries
9856 which are probably useless). Note that we must not suppress
9857 block-local extern declarations (whether used or not) because that
9858 would screw-up the debugger's name lookup mechanism and cause it to
9859 miss things which really ought to be in scope at a given point. */
9860 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9863 /* If we are in terse mode, don't generate any DIEs to represent any
9864 variable declarations or definitions. */
9865 if (debug_info_level <= DINFO_LEVEL_TERSE)
9870 /* Don't emit stubs for types unless they are needed by other DIEs. */
9871 if (TYPE_DECL_SUPPRESS_DEBUG (decl))
9874 /* Don't bother trying to generate any DIEs to represent any of the
9875 normal built-in types for the language we are compiling. */
9876 if (DECL_SOURCE_LINE (decl) == 0)
9878 /* OK, we need to generate one for `bool' so GDB knows what type
9879 comparisons have. */
9880 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9881 == DW_LANG_C_plus_plus)
9882 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9883 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9888 /* If we are in terse mode, don't generate any DIEs for types. */
9889 if (debug_info_level <= DINFO_LEVEL_TERSE)
9892 /* If we're a function-scope tag, initially use a parent of NULL;
9893 this will be fixed up in decls_for_scope. */
9894 if (decl_function_context (decl))
9903 gen_decl_die (decl, context_die);
9906 /* Output a marker (i.e. a label) for the beginning of the generated code for
9910 dwarf2out_begin_block (blocknum)
9911 register unsigned blocknum;
9913 function_section (current_function_decl);
9914 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9917 /* Output a marker (i.e. a label) for the end of the generated code for a
9921 dwarf2out_end_block (blocknum)
9922 register unsigned blocknum;
9924 function_section (current_function_decl);
9925 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9928 /* Returns nonzero if it is appropriate not to emit any debugging
9929 information for BLOCK, because it doesn't contain any instructions.
9931 Don't allow this for blocks with nested functions or local classes
9932 as we would end up with orphans, and in the presence of scheduling
9933 we may end up calling them anyway. */
9936 dwarf2out_ignore_block (block)
9940 for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl))
9941 if (TREE_CODE (decl) == FUNCTION_DECL
9942 || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)))
9947 /* Output a marker (i.e. a label) at a point in the assembly code which
9948 corresponds to a given source level label. */
9951 dwarf2out_label (insn)
9954 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9956 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9958 function_section (current_function_decl);
9959 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9960 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9961 (unsigned) INSN_UID (insn));
9965 /* Lookup a filename (in the list of filenames that we know about here in
9966 dwarf2out.c) and return its "index". The index of each (known) filename is
9967 just a unique number which is associated with only that one filename.
9968 We need such numbers for the sake of generating labels
9969 (in the .debug_sfnames section) and references to those
9970 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9971 If the filename given as an argument is not found in our current list,
9972 add it to the list and assign it the next available unique index number.
9973 In order to speed up searches, we remember the index of the filename
9974 was looked up last. This handles the majority of all searches. */
9977 lookup_filename (file_name)
9978 const char *file_name;
9980 static unsigned last_file_lookup_index = 0;
9981 register unsigned i;
9983 /* Check to see if the file name that was searched on the previous call
9984 matches this file name. If so, return the index. */
9985 if (last_file_lookup_index != 0)
9986 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9987 return last_file_lookup_index;
9989 /* Didn't match the previous lookup, search the table */
9990 for (i = 1; i < file_table_in_use; ++i)
9991 if (strcmp (file_name, file_table[i]) == 0)
9993 last_file_lookup_index = i;
9997 /* Prepare to add a new table entry by making sure there is enough space in
9998 the table to do so. If not, expand the current table. */
9999 if (file_table_in_use == file_table_allocated)
10001 file_table_allocated += FILE_TABLE_INCREMENT;
10003 = (char **) xrealloc (file_table,
10004 file_table_allocated * sizeof (char *));
10007 /* Add the new entry to the end of the filename table. */
10008 file_table[file_table_in_use] = xstrdup (file_name);
10009 last_file_lookup_index = file_table_in_use++;
10011 return last_file_lookup_index;
10014 /* Output a label to mark the beginning of a source code line entry
10015 and record information relating to this source line, in
10016 'line_info_table' for later output of the .debug_line section. */
10019 dwarf2out_line (filename, line)
10020 register const char *filename;
10021 register unsigned line;
10023 if (debug_info_level >= DINFO_LEVEL_NORMAL)
10025 function_section (current_function_decl);
10027 if (DWARF2_ASM_LINE_DEBUG_INFO)
10029 static const char *lastfile;
10031 /* Emit the .file and .loc directives understood by GNU as. */
10032 if (lastfile == 0 || strcmp (filename, lastfile))
10035 ggc_add_string_root ((char **) &lastfile, 1);
10037 fprintf (asm_out_file, "\t.file 0 \"%s\"\n", filename);
10038 lastfile = filename;
10041 fprintf (asm_out_file, "\t.loc 0 %d 0\n", line);
10043 /* Indicate that line number info exists. */
10044 ++line_info_table_in_use;
10046 /* Indicate that multiple line number tables exist. */
10047 if (DECL_SECTION_NAME (current_function_decl))
10048 ++separate_line_info_table_in_use;
10050 else if (DECL_SECTION_NAME (current_function_decl))
10052 register dw_separate_line_info_ref line_info;
10053 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
10054 separate_line_info_table_in_use);
10055 if (flag_debug_asm)
10056 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
10057 fputc ('\n', asm_out_file);
10059 /* expand the line info table if necessary */
10060 if (separate_line_info_table_in_use
10061 == separate_line_info_table_allocated)
10063 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
10064 separate_line_info_table
10065 = (dw_separate_line_info_ref)
10066 xrealloc (separate_line_info_table,
10067 separate_line_info_table_allocated
10068 * sizeof (dw_separate_line_info_entry));
10071 /* Add the new entry at the end of the line_info_table. */
10073 = &separate_line_info_table[separate_line_info_table_in_use++];
10074 line_info->dw_file_num = lookup_filename (filename);
10075 line_info->dw_line_num = line;
10076 line_info->function = current_funcdef_number;
10080 register dw_line_info_ref line_info;
10082 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
10083 line_info_table_in_use);
10084 if (flag_debug_asm)
10085 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
10086 fputc ('\n', asm_out_file);
10088 /* Expand the line info table if necessary. */
10089 if (line_info_table_in_use == line_info_table_allocated)
10091 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
10093 = (dw_line_info_ref)
10094 xrealloc (line_info_table,
10095 (line_info_table_allocated
10096 * sizeof (dw_line_info_entry)));
10099 /* Add the new entry at the end of the line_info_table. */
10100 line_info = &line_info_table[line_info_table_in_use++];
10101 line_info->dw_file_num = lookup_filename (filename);
10102 line_info->dw_line_num = line;
10107 /* Record the beginning of a new source file, for later output
10108 of the .debug_macinfo section. At present, unimplemented. */
10111 dwarf2out_start_source_file (filename)
10112 register const char *filename ATTRIBUTE_UNUSED;
10116 /* Record the end of a source file, for later output
10117 of the .debug_macinfo section. At present, unimplemented. */
10120 dwarf2out_end_source_file ()
10124 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10125 the tail part of the directive line, i.e. the part which is past the
10126 initial whitespace, #, whitespace, directive-name, whitespace part. */
10129 dwarf2out_define (lineno, buffer)
10130 register unsigned lineno ATTRIBUTE_UNUSED;
10131 register const char *buffer ATTRIBUTE_UNUSED;
10133 static int initialized = 0;
10136 dwarf2out_start_source_file (primary_filename);
10141 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10142 the tail part of the directive line, i.e. the part which is past the
10143 initial whitespace, #, whitespace, directive-name, whitespace part. */
10146 dwarf2out_undef (lineno, buffer)
10147 register unsigned lineno ATTRIBUTE_UNUSED;
10148 register const char *buffer ATTRIBUTE_UNUSED;
10152 /* Set up for Dwarf output at the start of compilation. */
10155 dwarf2out_init (asm_out_file, main_input_filename)
10156 register FILE *asm_out_file;
10157 register const char *main_input_filename;
10159 /* Remember the name of the primary input file. */
10160 primary_filename = main_input_filename;
10162 /* Allocate the initial hunk of the file_table. */
10163 file_table = (char **) xcalloc (FILE_TABLE_INCREMENT, sizeof (char *));
10164 file_table_allocated = FILE_TABLE_INCREMENT;
10166 /* Skip the first entry - file numbers begin at 1. */
10167 file_table_in_use = 1;
10169 /* Allocate the initial hunk of the decl_die_table. */
10171 = (dw_die_ref *) xcalloc (DECL_DIE_TABLE_INCREMENT, sizeof (dw_die_ref));
10172 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
10173 decl_die_table_in_use = 0;
10175 /* Allocate the initial hunk of the decl_scope_table. */
10177 = (tree *) xcalloc (DECL_SCOPE_TABLE_INCREMENT, sizeof (tree));
10178 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
10179 decl_scope_depth = 0;
10181 /* Allocate the initial hunk of the abbrev_die_table. */
10183 = (dw_die_ref *) xcalloc (ABBREV_DIE_TABLE_INCREMENT,
10184 sizeof (dw_die_ref));
10185 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
10186 /* Zero-th entry is allocated, but unused */
10187 abbrev_die_table_in_use = 1;
10189 /* Allocate the initial hunk of the line_info_table. */
10191 = (dw_line_info_ref) xcalloc (LINE_INFO_TABLE_INCREMENT,
10192 sizeof (dw_line_info_entry));
10193 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
10194 /* Zero-th entry is allocated, but unused */
10195 line_info_table_in_use = 1;
10197 /* Generate the initial DIE for the .debug section. Note that the (string)
10198 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
10199 will (typically) be a relative pathname and that this pathname should be
10200 taken as being relative to the directory from which the compiler was
10201 invoked when the given (base) source file was compiled. */
10202 comp_unit_die = gen_compile_unit_die (main_input_filename);
10206 VARRAY_RTX_INIT (used_rtx_varray, 32, "used_rtx_varray");
10207 ggc_add_rtx_varray_root (&used_rtx_varray, 1);
10210 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
10211 ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, ABBREV_SECTION_LABEL, 0);
10212 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10213 ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0);
10215 strcpy (text_section_label, stripattributes (TEXT_SECTION));
10216 ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label,
10217 DEBUG_INFO_SECTION_LABEL, 0);
10218 ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label,
10219 DEBUG_LINE_SECTION_LABEL, 0);
10221 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10222 ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
10223 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10225 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10226 ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
10228 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10229 ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
10230 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10231 ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
10234 /* Output stuff that dwarf requires at the end of every file,
10235 and generate the DWARF-2 debugging info. */
10238 dwarf2out_finish ()
10240 limbo_die_node *node, *next_node;
10243 /* Traverse the limbo die list, and add parent/child links. The only
10244 dies without parents that should be here are concrete instances of
10245 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
10246 For concrete instances, we can get the parent die from the abstract
10248 for (node = limbo_die_list; node; node = next_node)
10250 next_node = node->next;
10253 if (die->die_parent == NULL)
10255 dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin);
10257 add_child_die (origin->die_parent, die);
10258 else if (die == comp_unit_die)
10265 limbo_die_list = NULL;
10267 /* Walk through the list of incomplete types again, trying once more to
10268 emit full debugging info for them. */
10269 retry_incomplete_types ();
10271 /* Traverse the DIE's, reverse their lists of attributes and children,
10272 and add add sibling attributes to those DIE's that have children. */
10273 add_sibling_attributes (comp_unit_die);
10275 /* Output a terminator label for the .text section. */
10276 fputc ('\n', asm_out_file);
10277 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10278 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
10281 /* Output a terminator label for the .data section. */
10282 fputc ('\n', asm_out_file);
10283 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
10284 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
10286 /* Output a terminator label for the .bss section. */
10287 fputc ('\n', asm_out_file);
10288 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
10289 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
10292 /* Output the source line correspondence table. */
10293 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
10295 if (! DWARF2_ASM_LINE_DEBUG_INFO)
10297 fputc ('\n', asm_out_file);
10298 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10299 output_line_info ();
10302 /* We can only use the low/high_pc attributes if all of the code
10304 if (separate_line_info_table_in_use == 0)
10306 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label);
10307 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
10310 add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list,
10311 debug_line_section_label);
10314 #if 0 /* unimplemented */
10315 if (debug_info_level >= DINFO_LEVEL_VERBOSE && primary)
10316 add_AT_unsigned (die, DW_AT_macro_info, 0);
10319 /* Output the abbreviation table. */
10320 fputc ('\n', asm_out_file);
10321 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10322 build_abbrev_table (comp_unit_die);
10323 output_abbrev_section ();
10325 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
10326 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
10327 calc_die_sizes (comp_unit_die);
10329 /* Output debugging information. */
10330 fputc ('\n', asm_out_file);
10331 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10332 output_compilation_unit_header ();
10333 output_die (comp_unit_die);
10335 if (pubname_table_in_use)
10337 /* Output public names table. */
10338 fputc ('\n', asm_out_file);
10339 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
10340 output_pubnames ();
10343 /* We only put functions in the arange table, so don't write it out if
10344 we don't have any. */
10345 if (fde_table_in_use)
10347 /* Output the address range information. */
10348 fputc ('\n', asm_out_file);
10349 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
10353 #endif /* DWARF2_DEBUGGING_INFO */