1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 93, 95-98, 1999 Free Software Foundation, Inc.
3 Contributed by Gary Funck (gary@intrepid.com).
4 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
5 Extensively modified by Jason Merrill (jason@cygnus.com).
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* The first part of this file deals with the DWARF 2 frame unwind
25 information, which is also used by the GCC efficient exception handling
26 mechanism. The second part, controlled only by an #ifdef
27 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
36 #include "hard-reg-set.h"
38 #include "insn-config.h"
44 #include "dwarf2out.h"
46 #include "dyn-string.h"
48 /* We cannot use <assert.h> in GCC source, since that would include
49 GCC's assert.h, which may not be compatible with the host compiler. */
54 # define assert(e) do { if (! (e)) abort (); } while (0)
57 /* Decide whether we want to emit frame unwind information for the current
63 return (write_symbols == DWARF2_DEBUG
64 #ifdef DWARF2_FRAME_INFO
67 #ifdef DWARF2_UNWIND_INFO
68 || (flag_exceptions && ! exceptions_via_longjmp)
73 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
75 /* How to start an assembler comment. */
76 #ifndef ASM_COMMENT_START
77 #define ASM_COMMENT_START ";#"
80 typedef struct dw_cfi_struct *dw_cfi_ref;
81 typedef struct dw_fde_struct *dw_fde_ref;
82 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
84 /* Call frames are described using a sequence of Call Frame
85 Information instructions. The register number, offset
86 and address fields are provided as possible operands;
87 their use is selected by the opcode field. */
89 typedef union dw_cfi_oprnd_struct
91 unsigned long dw_cfi_reg_num;
92 long int dw_cfi_offset;
97 typedef struct dw_cfi_struct
99 dw_cfi_ref dw_cfi_next;
100 enum dwarf_call_frame_info dw_cfi_opc;
101 dw_cfi_oprnd dw_cfi_oprnd1;
102 dw_cfi_oprnd dw_cfi_oprnd2;
106 /* All call frame descriptions (FDE's) in the GCC generated DWARF
107 refer to a single Common Information Entry (CIE), defined at
108 the beginning of the .debug_frame section. This used of a single
109 CIE obviates the need to keep track of multiple CIE's
110 in the DWARF generation routines below. */
112 typedef struct dw_fde_struct
115 char *dw_fde_current_label;
117 dw_cfi_ref dw_fde_cfi;
121 /* Maximum size (in bytes) of an artificially generated label. */
122 #define MAX_ARTIFICIAL_LABEL_BYTES 30
124 /* Make sure we know the sizes of the various types dwarf can describe. These
125 are only defaults. If the sizes are different for your target, you should
126 override these values by defining the appropriate symbols in your tm.h
129 #ifndef CHAR_TYPE_SIZE
130 #define CHAR_TYPE_SIZE BITS_PER_UNIT
133 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
136 /* The size in bytes of a DWARF field indicating an offset or length
137 relative to a debug info section, specified to be 4 bytes in the DWARF-2
138 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
140 #ifndef DWARF_OFFSET_SIZE
141 #define DWARF_OFFSET_SIZE 4
144 #define DWARF_VERSION 2
146 /* Round SIZE up to the nearest BOUNDARY. */
147 #define DWARF_ROUND(SIZE,BOUNDARY) \
148 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
150 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
151 #ifdef STACK_GROWS_DOWNWARD
152 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
154 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
157 /* A pointer to the base of a table that contains frame description
158 information for each routine. */
159 static dw_fde_ref fde_table;
161 /* Number of elements currently allocated for fde_table. */
162 static unsigned fde_table_allocated;
164 /* Number of elements in fde_table currently in use. */
165 static unsigned fde_table_in_use;
167 /* Size (in elements) of increments by which we may expand the
169 #define FDE_TABLE_INCREMENT 256
171 /* A list of call frame insns for the CIE. */
172 static dw_cfi_ref cie_cfi_head;
174 /* The number of the current function definition for which debugging
175 information is being generated. These numbers range from 1 up to the
176 maximum number of function definitions contained within the current
177 compilation unit. These numbers are used to create unique label id's
178 unique to each function definition. */
179 static unsigned current_funcdef_number = 0;
181 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
182 attribute that accelerates the lookup of the FDE associated
183 with the subprogram. This variable holds the table index of the FDE
184 associated with the current function (body) definition. */
185 static unsigned current_funcdef_fde;
187 /* Forward declarations for functions defined in this file. */
189 static char *stripattributes PROTO((char *));
190 static char *dwarf_cfi_name PROTO((unsigned));
191 static dw_cfi_ref new_cfi PROTO((void));
192 static void add_cfi PROTO((dw_cfi_ref *, dw_cfi_ref));
193 static unsigned long size_of_uleb128 PROTO((unsigned long));
194 static unsigned long size_of_sleb128 PROTO((long));
195 static void output_uleb128 PROTO((unsigned long));
196 static void output_sleb128 PROTO((long));
197 static void add_fde_cfi PROTO((char *, dw_cfi_ref));
198 static void lookup_cfa_1 PROTO((dw_cfi_ref, unsigned long *,
200 static void lookup_cfa PROTO((unsigned long *, long *));
201 static void reg_save PROTO((char *, unsigned, unsigned,
203 static void initial_return_save PROTO((rtx));
204 static void output_cfi PROTO((dw_cfi_ref, dw_fde_ref));
205 static void output_call_frame_info PROTO((int));
206 static unsigned reg_number PROTO((rtx));
207 static void dwarf2out_stack_adjust PROTO((rtx));
209 /* Definitions of defaults for assembler-dependent names of various
210 pseudo-ops and section names.
211 Theses may be overridden in the tm.h file (if necessary) for a particular
214 #ifdef OBJECT_FORMAT_ELF
215 #ifndef UNALIGNED_SHORT_ASM_OP
216 #define UNALIGNED_SHORT_ASM_OP ".2byte"
218 #ifndef UNALIGNED_INT_ASM_OP
219 #define UNALIGNED_INT_ASM_OP ".4byte"
221 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
222 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
224 #endif /* OBJECT_FORMAT_ELF */
227 #define ASM_BYTE_OP ".byte"
230 /* Data and reference forms for relocatable data. */
231 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
232 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
234 /* Pseudo-op for defining a new section. */
235 #ifndef SECTION_ASM_OP
236 #define SECTION_ASM_OP ".section"
239 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
240 print the SECTION_ASM_OP and the section name. The default here works for
241 almost all svr4 assemblers, except for the sparc, where the section name
242 must be enclosed in double quotes. (See sparcv4.h). */
243 #ifndef SECTION_FORMAT
244 #ifdef PUSHSECTION_FORMAT
245 #define SECTION_FORMAT PUSHSECTION_FORMAT
247 #define SECTION_FORMAT "\t%s\t%s\n"
251 #ifndef FRAME_SECTION
252 #define FRAME_SECTION ".debug_frame"
255 #ifndef FUNC_BEGIN_LABEL
256 #define FUNC_BEGIN_LABEL "LFB"
258 #ifndef FUNC_END_LABEL
259 #define FUNC_END_LABEL "LFE"
261 #define CIE_AFTER_SIZE_LABEL "LSCIE"
262 #define CIE_END_LABEL "LECIE"
263 #define CIE_LENGTH_LABEL "LLCIE"
264 #define FDE_AFTER_SIZE_LABEL "LSFDE"
265 #define FDE_END_LABEL "LEFDE"
266 #define FDE_LENGTH_LABEL "LLFDE"
268 /* Definitions of defaults for various types of primitive assembly language
269 output operations. These may be overridden from within the tm.h file,
270 but typically, that is unnecessary. */
272 #ifndef ASM_OUTPUT_SECTION
273 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
274 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
277 #ifndef ASM_OUTPUT_DWARF_DATA1
278 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
279 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
282 #ifndef ASM_OUTPUT_DWARF_DELTA1
283 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
284 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
285 assemble_name (FILE, LABEL1); \
286 fprintf (FILE, "-"); \
287 assemble_name (FILE, LABEL2); \
291 #ifdef UNALIGNED_INT_ASM_OP
293 #ifndef UNALIGNED_OFFSET_ASM_OP
294 #define UNALIGNED_OFFSET_ASM_OP \
295 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
298 #ifndef UNALIGNED_WORD_ASM_OP
299 #define UNALIGNED_WORD_ASM_OP \
300 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
303 #ifndef ASM_OUTPUT_DWARF_DELTA2
304 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
305 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
306 assemble_name (FILE, LABEL1); \
307 fprintf (FILE, "-"); \
308 assemble_name (FILE, LABEL2); \
312 #ifndef ASM_OUTPUT_DWARF_DELTA4
313 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
314 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
315 assemble_name (FILE, LABEL1); \
316 fprintf (FILE, "-"); \
317 assemble_name (FILE, LABEL2); \
321 #ifndef ASM_OUTPUT_DWARF_DELTA
322 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
323 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
324 assemble_name (FILE, LABEL1); \
325 fprintf (FILE, "-"); \
326 assemble_name (FILE, LABEL2); \
330 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
331 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
332 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
333 assemble_name (FILE, LABEL1); \
334 fprintf (FILE, "-"); \
335 assemble_name (FILE, LABEL2); \
339 #ifndef ASM_OUTPUT_DWARF_ADDR
340 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
341 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
342 assemble_name (FILE, LABEL); \
346 /* ??? This macro takes an RTX in dwarfout.c and a string in dwarf2out.c.
347 We resolve the conflict by creating a new macro ASM_OUTPUT_DWARF2_ADDR_CONST
348 for ports that want to support both DWARF1 and DWARF2. This needs a better
349 solution. See also the comments in sparc/sp64-elf.h. */
350 #ifdef ASM_OUTPUT_DWARF2_ADDR_CONST
351 #undef ASM_OUTPUT_DWARF_ADDR_CONST
352 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
353 ASM_OUTPUT_DWARF2_ADDR_CONST (FILE, ADDR)
356 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
357 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
358 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
361 #ifndef ASM_OUTPUT_DWARF_OFFSET4
362 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
363 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
364 assemble_name (FILE, LABEL); \
368 #ifndef ASM_OUTPUT_DWARF_OFFSET
369 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
370 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
371 assemble_name (FILE, LABEL); \
375 #ifndef ASM_OUTPUT_DWARF_DATA2
376 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
377 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
380 #ifndef ASM_OUTPUT_DWARF_DATA4
381 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
382 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
385 #ifndef ASM_OUTPUT_DWARF_DATA
386 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
387 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
388 (unsigned long) (VALUE))
391 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
392 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
393 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
394 (unsigned long) (VALUE))
397 #ifndef ASM_OUTPUT_DWARF_DATA8
398 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
400 if (WORDS_BIG_ENDIAN) \
402 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
403 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
407 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
408 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
413 #else /* UNALIGNED_INT_ASM_OP */
415 /* We don't have unaligned support, let's hope the normal output works for
418 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
419 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
421 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
422 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
424 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
425 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
427 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
428 assemble_integer (gen_rtx_MINUS (HImode, \
429 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
430 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
433 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
434 assemble_integer (gen_rtx_MINUS (SImode, \
435 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
436 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
439 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
440 assemble_integer (gen_rtx_MINUS (Pmode, \
441 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
442 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
445 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
446 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
448 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
449 assemble_integer (GEN_INT (VALUE), 4, 1)
451 #endif /* UNALIGNED_INT_ASM_OP */
454 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
455 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
457 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
458 assemble_name (FILE, SY); \
460 assemble_name (FILE, HI); \
462 assemble_name (FILE, LO); \
465 #endif /* SET_ASM_OP */
467 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
468 newline is produced. When flag_debug_asm is asserted, we add commentary
469 at the end of the line, so we must avoid output of a newline here. */
470 #ifndef ASM_OUTPUT_DWARF_STRING
471 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
473 register int slen = strlen(P); \
474 register char *p = (P); \
476 fprintf (FILE, "\t.ascii \""); \
477 for (i = 0; i < slen; i++) \
479 register int c = p[i]; \
480 if (c == '\"' || c == '\\') \
482 if (c >= ' ' && c < 0177) \
486 fprintf (FILE, "\\%o", c); \
489 fprintf (FILE, "\\0\""); \
494 /* The DWARF 2 CFA column which tracks the return address. Normally this
495 is the column for PC, or the first column after all of the hard
497 #ifndef DWARF_FRAME_RETURN_COLUMN
499 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
501 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
505 /* The mapping from gcc register number to DWARF 2 CFA column number. By
506 default, we just provide columns for all registers. */
507 #ifndef DWARF_FRAME_REGNUM
508 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
511 /* Hook used by __throw. */
514 expand_builtin_dwarf_fp_regnum ()
516 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
519 /* The offset from the incoming value of %sp to the top of the stack frame
520 for the current function. */
521 #ifndef INCOMING_FRAME_SP_OFFSET
522 #define INCOMING_FRAME_SP_OFFSET 0
525 /* Return a pointer to a copy of the section string name S with all
526 attributes stripped off, and an asterisk prepended (for assemble_name). */
532 char *stripped = xmalloc (strlen (s) + 2);
537 while (*s && *s != ',')
544 /* Return the register number described by a given RTL node. */
550 register unsigned regno = REGNO (rtl);
552 if (regno >= FIRST_PSEUDO_REGISTER)
554 warning ("internal regno botch: regno = %d\n", regno);
558 regno = DBX_REGISTER_NUMBER (regno);
562 struct reg_size_range
569 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
570 We do this in kind of a roundabout way, by building up a list of
571 register size ranges and seeing where our register falls in one of those
572 ranges. We need to do it this way because REG_TREE is not a constant,
573 and the target macros were not designed to make this task easy. */
576 expand_builtin_dwarf_reg_size (reg_tree, target)
580 enum machine_mode mode;
582 struct reg_size_range ranges[5];
589 for (; i < FIRST_PSEUDO_REGISTER; ++i)
591 /* The return address is out of order on the MIPS, and we don't use
592 copy_reg for it anyway, so we don't care here how large it is. */
593 if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
596 mode = reg_raw_mode[i];
598 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
599 to use the same size as word_mode, since that reduces the number
600 of ranges we need. It should not matter, since the result should
601 never be used for a condition code register anyways. */
602 if (GET_MODE_CLASS (mode) == MODE_CC)
605 size = GET_MODE_SIZE (mode);
607 /* If this register is not valid in the specified mode and
608 we have a previous size, use that for the size of this
609 register to avoid making junk tiny ranges. */
610 if (! HARD_REGNO_MODE_OK (i, mode) && last_size != -1)
613 if (size != last_size)
615 ranges[n_ranges].beg = i;
616 ranges[n_ranges].size = last_size = size;
621 ranges[n_ranges-1].end = i;
624 /* The usual case: fp regs surrounded by general regs. */
625 if (n_ranges == 3 && ranges[0].size == ranges[2].size)
627 if ((DWARF_FRAME_REGNUM (ranges[1].end)
628 - DWARF_FRAME_REGNUM (ranges[1].beg))
629 != ranges[1].end - ranges[1].beg)
631 t = fold (build (GE_EXPR, integer_type_node, reg_tree,
632 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].beg), 0)));
633 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
634 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].end), 0)));
635 t = fold (build (TRUTH_ANDIF_EXPR, integer_type_node, t, t2));
636 t = fold (build (COND_EXPR, integer_type_node, t,
637 build_int_2 (ranges[1].size, 0),
638 build_int_2 (ranges[0].size, 0)));
642 /* Initialize last_end to be larger than any possible
643 DWARF_FRAME_REGNUM. */
644 int last_end = 0x7fffffff;
646 t = build_int_2 (ranges[n_ranges].size, 0);
649 int beg = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
650 int end = DWARF_FRAME_REGNUM (ranges[n_ranges].end);
656 if (end - beg != ranges[n_ranges].end - ranges[n_ranges].beg)
658 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
659 build_int_2 (end, 0)));
660 t = fold (build (COND_EXPR, integer_type_node, t2,
661 build_int_2 (ranges[n_ranges].size, 0), t));
663 while (--n_ranges >= 0);
665 return expand_expr (t, target, Pmode, 0);
668 /* Convert a DWARF call frame info. operation to its string name */
671 dwarf_cfi_name (cfi_opc)
672 register unsigned cfi_opc;
676 case DW_CFA_advance_loc:
677 return "DW_CFA_advance_loc";
679 return "DW_CFA_offset";
681 return "DW_CFA_restore";
685 return "DW_CFA_set_loc";
686 case DW_CFA_advance_loc1:
687 return "DW_CFA_advance_loc1";
688 case DW_CFA_advance_loc2:
689 return "DW_CFA_advance_loc2";
690 case DW_CFA_advance_loc4:
691 return "DW_CFA_advance_loc4";
692 case DW_CFA_offset_extended:
693 return "DW_CFA_offset_extended";
694 case DW_CFA_restore_extended:
695 return "DW_CFA_restore_extended";
696 case DW_CFA_undefined:
697 return "DW_CFA_undefined";
698 case DW_CFA_same_value:
699 return "DW_CFA_same_value";
700 case DW_CFA_register:
701 return "DW_CFA_register";
702 case DW_CFA_remember_state:
703 return "DW_CFA_remember_state";
704 case DW_CFA_restore_state:
705 return "DW_CFA_restore_state";
707 return "DW_CFA_def_cfa";
708 case DW_CFA_def_cfa_register:
709 return "DW_CFA_def_cfa_register";
710 case DW_CFA_def_cfa_offset:
711 return "DW_CFA_def_cfa_offset";
713 /* SGI/MIPS specific */
714 case DW_CFA_MIPS_advance_loc8:
715 return "DW_CFA_MIPS_advance_loc8";
718 case DW_CFA_GNU_window_save:
719 return "DW_CFA_GNU_window_save";
720 case DW_CFA_GNU_args_size:
721 return "DW_CFA_GNU_args_size";
724 return "DW_CFA_<unknown>";
728 /* Return a pointer to a newly allocated Call Frame Instruction. */
730 static inline dw_cfi_ref
733 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
735 cfi->dw_cfi_next = NULL;
736 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
737 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
742 /* Add a Call Frame Instruction to list of instructions. */
745 add_cfi (list_head, cfi)
746 register dw_cfi_ref *list_head;
747 register dw_cfi_ref cfi;
749 register dw_cfi_ref *p;
751 /* Find the end of the chain. */
752 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
758 /* Generate a new label for the CFI info to refer to. */
761 dwarf2out_cfi_label ()
763 static char label[20];
764 static unsigned long label_num = 0;
766 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
767 ASM_OUTPUT_LABEL (asm_out_file, label);
772 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
773 or to the CIE if LABEL is NULL. */
776 add_fde_cfi (label, cfi)
777 register char *label;
778 register dw_cfi_ref cfi;
782 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
785 label = dwarf2out_cfi_label ();
787 if (fde->dw_fde_current_label == NULL
788 || strcmp (label, fde->dw_fde_current_label) != 0)
790 register dw_cfi_ref xcfi;
792 fde->dw_fde_current_label = label = xstrdup (label);
794 /* Set the location counter to the new label. */
796 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
797 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
798 add_cfi (&fde->dw_fde_cfi, xcfi);
801 add_cfi (&fde->dw_fde_cfi, cfi);
805 add_cfi (&cie_cfi_head, cfi);
808 /* Subroutine of lookup_cfa. */
811 lookup_cfa_1 (cfi, regp, offsetp)
812 register dw_cfi_ref cfi;
813 register unsigned long *regp;
814 register long *offsetp;
816 switch (cfi->dw_cfi_opc)
818 case DW_CFA_def_cfa_offset:
819 *offsetp = cfi->dw_cfi_oprnd1.dw_cfi_offset;
821 case DW_CFA_def_cfa_register:
822 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
825 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
826 *offsetp = cfi->dw_cfi_oprnd2.dw_cfi_offset;
833 /* Find the previous value for the CFA. */
836 lookup_cfa (regp, offsetp)
837 register unsigned long *regp;
838 register long *offsetp;
840 register dw_cfi_ref cfi;
842 *regp = (unsigned long) -1;
845 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
846 lookup_cfa_1 (cfi, regp, offsetp);
848 if (fde_table_in_use)
850 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
851 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
852 lookup_cfa_1 (cfi, regp, offsetp);
856 /* The current rule for calculating the DWARF2 canonical frame address. */
857 static unsigned long cfa_reg;
858 static long cfa_offset;
860 /* The register used for saving registers to the stack, and its offset
862 static unsigned cfa_store_reg;
863 static long cfa_store_offset;
865 /* The running total of the size of arguments pushed onto the stack. */
866 static long args_size;
868 /* The last args_size we actually output. */
869 static long old_args_size;
871 /* Entry point to update the canonical frame address (CFA).
872 LABEL is passed to add_fde_cfi. The value of CFA is now to be
873 calculated from REG+OFFSET. */
876 dwarf2out_def_cfa (label, reg, offset)
877 register char *label;
878 register unsigned reg;
879 register long offset;
881 register dw_cfi_ref cfi;
882 unsigned long old_reg;
887 if (cfa_store_reg == reg)
888 cfa_store_offset = offset;
890 reg = DWARF_FRAME_REGNUM (reg);
891 lookup_cfa (&old_reg, &old_offset);
893 if (reg == old_reg && offset == old_offset)
900 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
901 cfi->dw_cfi_oprnd1.dw_cfi_offset = offset;
904 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
905 else if (offset == old_offset && old_reg != (unsigned long) -1)
907 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
908 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
914 cfi->dw_cfi_opc = DW_CFA_def_cfa;
915 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
916 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
919 add_fde_cfi (label, cfi);
922 /* Add the CFI for saving a register. REG is the CFA column number.
923 LABEL is passed to add_fde_cfi.
924 If SREG is -1, the register is saved at OFFSET from the CFA;
925 otherwise it is saved in SREG. */
928 reg_save (label, reg, sreg, offset)
929 register char * label;
930 register unsigned reg;
931 register unsigned sreg;
932 register long offset;
934 register dw_cfi_ref cfi = new_cfi ();
936 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
938 /* The following comparison is correct. -1 is used to indicate that
939 the value isn't a register number. */
940 if (sreg == (unsigned int) -1)
943 /* The register number won't fit in 6 bits, so we have to use
945 cfi->dw_cfi_opc = DW_CFA_offset_extended;
947 cfi->dw_cfi_opc = DW_CFA_offset;
949 offset /= DWARF_CIE_DATA_ALIGNMENT;
952 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
956 cfi->dw_cfi_opc = DW_CFA_register;
957 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
960 add_fde_cfi (label, cfi);
963 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
964 This CFI tells the unwinder that it needs to restore the window registers
965 from the previous frame's window save area.
967 ??? Perhaps we should note in the CIE where windows are saved (instead of
968 assuming 0(cfa)) and what registers are in the window. */
971 dwarf2out_window_save (label)
972 register char * label;
974 register dw_cfi_ref cfi = new_cfi ();
975 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
976 add_fde_cfi (label, cfi);
979 /* Add a CFI to update the running total of the size of arguments
980 pushed onto the stack. */
983 dwarf2out_args_size (label, size)
987 register dw_cfi_ref cfi;
989 if (size == old_args_size)
991 old_args_size = size;
994 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
995 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
996 add_fde_cfi (label, cfi);
999 /* Entry point for saving a register to the stack. REG is the GCC register
1000 number. LABEL and OFFSET are passed to reg_save. */
1003 dwarf2out_reg_save (label, reg, offset)
1004 register char * label;
1005 register unsigned reg;
1006 register long offset;
1008 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
1011 /* Entry point for saving the return address in the stack.
1012 LABEL and OFFSET are passed to reg_save. */
1015 dwarf2out_return_save (label, offset)
1016 register char * label;
1017 register long offset;
1019 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1022 /* Entry point for saving the return address in a register.
1023 LABEL and SREG are passed to reg_save. */
1026 dwarf2out_return_reg (label, sreg)
1027 register char * label;
1028 register unsigned sreg;
1030 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1033 /* Record the initial position of the return address. RTL is
1034 INCOMING_RETURN_ADDR_RTX. */
1037 initial_return_save (rtl)
1040 unsigned int reg = (unsigned int) -1;
1043 switch (GET_CODE (rtl))
1046 /* RA is in a register. */
1047 reg = reg_number (rtl);
1050 /* RA is on the stack. */
1051 rtl = XEXP (rtl, 0);
1052 switch (GET_CODE (rtl))
1055 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1060 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1062 offset = INTVAL (XEXP (rtl, 1));
1065 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1067 offset = -INTVAL (XEXP (rtl, 1));
1074 /* The return address is at some offset from any value we can
1075 actually load. For instance, on the SPARC it is in %i7+8. Just
1076 ignore the offset for now; it doesn't matter for unwinding frames. */
1077 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1079 initial_return_save (XEXP (rtl, 0));
1085 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa_offset);
1088 /* Check INSN to see if it looks like a push or a stack adjustment, and
1089 make a note of it if it does. EH uses this information to find out how
1090 much extra space it needs to pop off the stack. */
1093 dwarf2out_stack_adjust (insn)
1099 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1101 /* Extract the size of the args from the CALL rtx itself. */
1103 insn = PATTERN (insn);
1104 if (GET_CODE (insn) == PARALLEL)
1105 insn = XVECEXP (insn, 0, 0);
1106 if (GET_CODE (insn) == SET)
1107 insn = SET_SRC (insn);
1108 assert (GET_CODE (insn) == CALL);
1109 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1113 /* If only calls can throw, and we have a frame pointer,
1114 save up adjustments until we see the CALL_INSN. */
1115 else if (! asynchronous_exceptions
1116 && cfa_reg != STACK_POINTER_REGNUM)
1119 if (GET_CODE (insn) == BARRIER)
1121 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1122 the compiler will have already emitted a stack adjustment, but
1123 doesn't bother for calls to noreturn functions. */
1124 #ifdef STACK_GROWS_DOWNWARD
1125 offset = -args_size;
1130 else if (GET_CODE (PATTERN (insn)) == SET)
1135 insn = PATTERN (insn);
1136 src = SET_SRC (insn);
1137 dest = SET_DEST (insn);
1139 if (dest == stack_pointer_rtx)
1141 /* (set (reg sp) (plus (reg sp) (const_int))) */
1142 code = GET_CODE (src);
1143 if (! (code == PLUS || code == MINUS)
1144 || XEXP (src, 0) != stack_pointer_rtx
1145 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1148 offset = INTVAL (XEXP (src, 1));
1150 else if (GET_CODE (dest) == MEM)
1152 /* (set (mem (pre_dec (reg sp))) (foo)) */
1153 src = XEXP (dest, 0);
1154 code = GET_CODE (src);
1156 if (! (code == PRE_DEC || code == PRE_INC)
1157 || XEXP (src, 0) != stack_pointer_rtx)
1160 offset = GET_MODE_SIZE (GET_MODE (dest));
1165 if (code == PLUS || code == PRE_INC)
1174 if (cfa_reg == STACK_POINTER_REGNUM)
1175 cfa_offset += offset;
1177 #ifndef STACK_GROWS_DOWNWARD
1180 args_size += offset;
1184 label = dwarf2out_cfi_label ();
1185 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1186 dwarf2out_args_size (label, args_size);
1189 /* Record call frame debugging information for INSN, which either
1190 sets SP or FP (adjusting how we calculate the frame address) or saves a
1191 register to the stack. If INSN is NULL_RTX, initialize our state. */
1194 dwarf2out_frame_debug (insn)
1201 /* A temporary register used in adjusting SP or setting up the store_reg. */
1202 static unsigned cfa_temp_reg;
1203 static long cfa_temp_value;
1205 if (insn == NULL_RTX)
1207 /* Set up state for generating call frame debug info. */
1208 lookup_cfa (&cfa_reg, &cfa_offset);
1209 if (cfa_reg != DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1211 cfa_reg = STACK_POINTER_REGNUM;
1212 cfa_store_reg = cfa_reg;
1213 cfa_store_offset = cfa_offset;
1219 if (! RTX_FRAME_RELATED_P (insn))
1221 dwarf2out_stack_adjust (insn);
1225 label = dwarf2out_cfi_label ();
1227 src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX);
1229 insn = XEXP (src, 0);
1231 insn = PATTERN (insn);
1233 /* Assume that in a PARALLEL prologue insn, only the first elt is
1234 significant. Currently this is true. */
1235 if (GET_CODE (insn) == PARALLEL)
1236 insn = XVECEXP (insn, 0, 0);
1237 if (GET_CODE (insn) != SET)
1240 src = SET_SRC (insn);
1241 dest = SET_DEST (insn);
1243 switch (GET_CODE (dest))
1246 /* Update the CFA rule wrt SP or FP. Make sure src is
1247 relative to the current CFA register. */
1248 switch (GET_CODE (src))
1250 /* Setting FP from SP. */
1252 if (cfa_reg != (unsigned) REGNO (src))
1254 if (REGNO (dest) != STACK_POINTER_REGNUM
1255 && !(frame_pointer_needed
1256 && REGNO (dest) == HARD_FRAME_POINTER_REGNUM))
1258 cfa_reg = REGNO (dest);
1263 if (dest == stack_pointer_rtx)
1266 switch (GET_CODE (XEXP (src, 1)))
1269 offset = INTVAL (XEXP (src, 1));
1272 if ((unsigned) REGNO (XEXP (src, 1)) != cfa_temp_reg)
1274 offset = cfa_temp_value;
1280 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1282 /* Restoring SP from FP in the epilogue. */
1283 if (cfa_reg != (unsigned) HARD_FRAME_POINTER_REGNUM)
1285 cfa_reg = STACK_POINTER_REGNUM;
1287 else if (XEXP (src, 0) != stack_pointer_rtx)
1290 if (GET_CODE (src) == PLUS)
1292 if (cfa_reg == STACK_POINTER_REGNUM)
1293 cfa_offset += offset;
1294 if (cfa_store_reg == STACK_POINTER_REGNUM)
1295 cfa_store_offset += offset;
1297 else if (dest == hard_frame_pointer_rtx)
1299 /* Either setting the FP from an offset of the SP,
1300 or adjusting the FP */
1301 if (! frame_pointer_needed
1302 || REGNO (dest) != HARD_FRAME_POINTER_REGNUM)
1305 if (XEXP (src, 0) == stack_pointer_rtx
1306 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1308 if (cfa_reg != STACK_POINTER_REGNUM)
1310 offset = INTVAL (XEXP (src, 1));
1311 if (GET_CODE (src) == PLUS)
1313 cfa_offset += offset;
1314 cfa_reg = HARD_FRAME_POINTER_REGNUM;
1316 else if (XEXP (src, 0) == hard_frame_pointer_rtx
1317 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1319 if (cfa_reg != (unsigned) HARD_FRAME_POINTER_REGNUM)
1321 offset = INTVAL (XEXP (src, 1));
1322 if (GET_CODE (src) == PLUS)
1324 cfa_offset += offset;
1332 if (GET_CODE (src) != PLUS
1333 || XEXP (src, 1) != stack_pointer_rtx)
1335 if (GET_CODE (XEXP (src, 0)) != REG
1336 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg)
1338 if (cfa_reg != STACK_POINTER_REGNUM)
1340 cfa_store_reg = REGNO (dest);
1341 cfa_store_offset = cfa_offset - cfa_temp_value;
1346 cfa_temp_reg = REGNO (dest);
1347 cfa_temp_value = INTVAL (src);
1351 if (GET_CODE (XEXP (src, 0)) != REG
1352 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg
1353 || (unsigned) REGNO (dest) != cfa_temp_reg
1354 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1356 cfa_temp_value |= INTVAL (XEXP (src, 1));
1362 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1366 /* Saving a register to the stack. Make sure dest is relative to the
1368 if (GET_CODE (src) != REG)
1370 switch (GET_CODE (XEXP (dest, 0)))
1375 offset = GET_MODE_SIZE (GET_MODE (dest));
1376 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1379 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1380 || cfa_store_reg != STACK_POINTER_REGNUM)
1382 cfa_store_offset += offset;
1383 if (cfa_reg == STACK_POINTER_REGNUM)
1384 cfa_offset = cfa_store_offset;
1386 offset = -cfa_store_offset;
1389 /* With an offset. */
1392 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1393 if (GET_CODE (src) == MINUS)
1396 if (cfa_store_reg != (unsigned) REGNO (XEXP (XEXP (dest, 0), 0)))
1398 offset -= cfa_store_offset;
1401 /* Without an offset. */
1403 if (cfa_store_reg != (unsigned) REGNO (XEXP (dest, 0)))
1405 offset = -cfa_store_offset;
1411 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1412 dwarf2out_reg_save (label, REGNO (src), offset);
1420 /* Return the size of an unsigned LEB128 quantity. */
1422 static inline unsigned long
1423 size_of_uleb128 (value)
1424 register unsigned long value;
1426 register unsigned long size = 0;
1427 register unsigned byte;
1431 byte = (value & 0x7f);
1440 /* Return the size of a signed LEB128 quantity. */
1442 static inline unsigned long
1443 size_of_sleb128 (value)
1444 register long value;
1446 register unsigned long size = 0;
1447 register unsigned byte;
1451 byte = (value & 0x7f);
1455 while (!(((value == 0) && ((byte & 0x40) == 0))
1456 || ((value == -1) && ((byte & 0x40) != 0))));
1461 /* Output an unsigned LEB128 quantity. */
1464 output_uleb128 (value)
1465 register unsigned long value;
1467 unsigned long save_value = value;
1469 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1472 register unsigned byte = (value & 0x7f);
1475 /* More bytes to follow. */
1478 fprintf (asm_out_file, "0x%x", byte);
1480 fprintf (asm_out_file, ",");
1485 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1488 /* Output an signed LEB128 quantity. */
1491 output_sleb128 (value)
1492 register long value;
1495 register unsigned byte;
1496 long save_value = value;
1498 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1501 byte = (value & 0x7f);
1502 /* arithmetic shift */
1504 more = !((((value == 0) && ((byte & 0x40) == 0))
1505 || ((value == -1) && ((byte & 0x40) != 0))));
1509 fprintf (asm_out_file, "0x%x", byte);
1511 fprintf (asm_out_file, ",");
1516 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1519 /* Output a Call Frame Information opcode and its operand(s). */
1522 output_cfi (cfi, fde)
1523 register dw_cfi_ref cfi;
1524 register dw_fde_ref fde;
1526 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1528 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1530 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1532 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1533 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1534 fputc ('\n', asm_out_file);
1537 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1539 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1541 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1543 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1544 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1546 fputc ('\n', asm_out_file);
1547 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1548 fputc ('\n', asm_out_file);
1550 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1552 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1554 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1556 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1557 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1559 fputc ('\n', asm_out_file);
1563 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1565 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1566 dwarf_cfi_name (cfi->dw_cfi_opc));
1568 fputc ('\n', asm_out_file);
1569 switch (cfi->dw_cfi_opc)
1571 case DW_CFA_set_loc:
1572 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1573 fputc ('\n', asm_out_file);
1575 case DW_CFA_advance_loc1:
1576 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1577 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1578 fde->dw_fde_current_label);
1579 fputc ('\n', asm_out_file);
1580 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1582 case DW_CFA_advance_loc2:
1583 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1584 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1585 fde->dw_fde_current_label);
1586 fputc ('\n', asm_out_file);
1587 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1589 case DW_CFA_advance_loc4:
1590 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1591 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1592 fde->dw_fde_current_label);
1593 fputc ('\n', asm_out_file);
1594 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1596 #ifdef MIPS_DEBUGGING_INFO
1597 case DW_CFA_MIPS_advance_loc8:
1598 /* TODO: not currently implemented. */
1602 case DW_CFA_offset_extended:
1603 case DW_CFA_def_cfa:
1604 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1605 fputc ('\n', asm_out_file);
1606 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1607 fputc ('\n', asm_out_file);
1609 case DW_CFA_restore_extended:
1610 case DW_CFA_undefined:
1611 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1612 fputc ('\n', asm_out_file);
1614 case DW_CFA_same_value:
1615 case DW_CFA_def_cfa_register:
1616 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1617 fputc ('\n', asm_out_file);
1619 case DW_CFA_register:
1620 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1621 fputc ('\n', asm_out_file);
1622 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1623 fputc ('\n', asm_out_file);
1625 case DW_CFA_def_cfa_offset:
1626 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1627 fputc ('\n', asm_out_file);
1629 case DW_CFA_GNU_window_save:
1631 case DW_CFA_GNU_args_size:
1632 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1633 fputc ('\n', asm_out_file);
1641 #if !defined (EH_FRAME_SECTION)
1642 #if defined (EH_FRAME_SECTION_ASM_OP)
1643 #define EH_FRAME_SECTION() eh_frame_section();
1645 #if defined (ASM_OUTPUT_SECTION_NAME)
1646 #define EH_FRAME_SECTION() \
1648 named_section (NULL_TREE, ".eh_frame", 0); \
1654 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
1655 #if !defined (HAS_INIT_SECTION) && !defined (INIT_SECTION_ASM_OP)
1656 #undef EH_FRAME_SECTION
1659 /* Output the call frame information used to used to record information
1660 that relates to calculating the frame pointer, and records the
1661 location of saved registers. */
1664 output_call_frame_info (for_eh)
1667 register unsigned long i;
1668 register dw_fde_ref fde;
1669 register dw_cfi_ref cfi;
1670 char l1[20], l2[20];
1671 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1675 /* Do we want to include a pointer to the exception table? */
1676 int eh_ptr = for_eh && exception_table_p ();
1678 fputc ('\n', asm_out_file);
1680 /* We're going to be generating comments, so turn on app. */
1686 #ifdef EH_FRAME_SECTION
1687 EH_FRAME_SECTION ();
1689 tree label = get_file_function_name ('F');
1691 force_data_section ();
1692 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1693 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1694 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1696 assemble_label ("__FRAME_BEGIN__");
1699 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1701 /* Output the CIE. */
1702 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1703 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1704 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1705 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1707 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1709 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1712 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1714 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1717 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1720 fputc ('\n', asm_out_file);
1721 ASM_OUTPUT_LABEL (asm_out_file, l1);
1724 /* Now that the CIE pointer is PC-relative for EH,
1725 use 0 to identify the CIE. */
1726 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1728 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1731 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1733 fputc ('\n', asm_out_file);
1734 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1736 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1737 fputc ('\n', asm_out_file);
1740 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1742 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1744 fputc ('\n', asm_out_file);
1747 /* The CIE contains a pointer to the exception region info for the
1748 frame. Make the augmentation string three bytes (including the
1749 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1750 can't handle unaligned relocs. */
1753 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1754 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1758 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1760 fputc ('\n', asm_out_file);
1762 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1764 fprintf (asm_out_file, "\t%s pointer to exception region info",
1769 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1771 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1775 fputc ('\n', asm_out_file);
1778 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1780 fputc ('\n', asm_out_file);
1781 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1783 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1785 fputc ('\n', asm_out_file);
1786 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1788 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1790 fputc ('\n', asm_out_file);
1792 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1793 output_cfi (cfi, NULL);
1795 /* Pad the CIE out to an address sized boundary. */
1796 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1797 ASM_OUTPUT_LABEL (asm_out_file, l2);
1798 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1799 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1801 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1802 fputc ('\n', asm_out_file);
1805 /* Loop through all of the FDE's. */
1806 for (i = 0; i < fde_table_in_use; ++i)
1808 fde = &fde_table[i];
1810 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1811 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1812 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1813 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1815 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1817 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1820 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1822 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1825 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1826 fputc ('\n', asm_out_file);
1827 ASM_OUTPUT_LABEL (asm_out_file, l1);
1829 /* ??? This always emits a 4 byte offset when for_eh is true, but it
1830 emits a target dependent sized offset when for_eh is not true.
1831 This inconsistency may confuse gdb. The only case where we need a
1832 non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI
1833 compatibility if we emit a 4 byte offset. We need a 4 byte offset
1834 though in order to be compatible with the dwarf_fde struct in frame.c.
1835 If the for_eh case is changed, then the struct in frame.c has
1836 to be adjusted appropriately. */
1838 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l1, "__FRAME_BEGIN__");
1840 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1842 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1844 fputc ('\n', asm_out_file);
1845 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1847 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1849 fputc ('\n', asm_out_file);
1850 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1851 fde->dw_fde_end, fde->dw_fde_begin);
1853 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1855 fputc ('\n', asm_out_file);
1857 /* Loop through the Call Frame Instructions associated with
1859 fde->dw_fde_current_label = fde->dw_fde_begin;
1860 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1861 output_cfi (cfi, fde);
1863 /* Pad the FDE out to an address sized boundary. */
1864 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1865 ASM_OUTPUT_LABEL (asm_out_file, l2);
1866 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1867 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1869 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1870 fputc ('\n', asm_out_file);
1873 #ifndef EH_FRAME_SECTION
1876 /* Emit terminating zero for table. */
1877 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1878 fputc ('\n', asm_out_file);
1881 #ifdef MIPS_DEBUGGING_INFO
1882 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1883 get a value of 0. Putting .align 0 after the label fixes it. */
1884 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1887 /* Turn off app to make assembly quicker. */
1892 /* Output a marker (i.e. a label) for the beginning of a function, before
1896 dwarf2out_begin_prologue ()
1898 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1899 register dw_fde_ref fde;
1901 ++current_funcdef_number;
1903 function_section (current_function_decl);
1904 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1905 current_funcdef_number);
1906 ASM_OUTPUT_LABEL (asm_out_file, label);
1908 /* Expand the fde table if necessary. */
1909 if (fde_table_in_use == fde_table_allocated)
1911 fde_table_allocated += FDE_TABLE_INCREMENT;
1913 = (dw_fde_ref) xrealloc (fde_table,
1914 fde_table_allocated * sizeof (dw_fde_node));
1917 /* Record the FDE associated with this function. */
1918 current_funcdef_fde = fde_table_in_use;
1920 /* Add the new FDE at the end of the fde_table. */
1921 fde = &fde_table[fde_table_in_use++];
1922 fde->dw_fde_begin = xstrdup (label);
1923 fde->dw_fde_current_label = NULL;
1924 fde->dw_fde_end = NULL;
1925 fde->dw_fde_cfi = NULL;
1927 args_size = old_args_size = 0;
1930 /* Output a marker (i.e. a label) for the absolute end of the generated code
1931 for a function definition. This gets called *after* the epilogue code has
1935 dwarf2out_end_epilogue ()
1938 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1940 /* Output a label to mark the endpoint of the code generated for this
1942 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
1943 ASM_OUTPUT_LABEL (asm_out_file, label);
1944 fde = &fde_table[fde_table_in_use - 1];
1945 fde->dw_fde_end = xstrdup (label);
1949 dwarf2out_frame_init ()
1951 /* Allocate the initial hunk of the fde_table. */
1953 = (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1954 bzero ((char *) fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1955 fde_table_allocated = FDE_TABLE_INCREMENT;
1956 fde_table_in_use = 0;
1958 /* Generate the CFA instructions common to all FDE's. Do it now for the
1959 sake of lookup_cfa. */
1961 #ifdef DWARF2_UNWIND_INFO
1962 /* On entry, the Canonical Frame Address is at SP. */
1963 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
1964 initial_return_save (INCOMING_RETURN_ADDR_RTX);
1969 dwarf2out_frame_finish ()
1971 /* Output call frame information. */
1972 #ifdef MIPS_DEBUGGING_INFO
1973 if (write_symbols == DWARF2_DEBUG)
1974 output_call_frame_info (0);
1975 if (flag_exceptions && ! exceptions_via_longjmp)
1976 output_call_frame_info (1);
1978 if (write_symbols == DWARF2_DEBUG
1979 || (flag_exceptions && ! exceptions_via_longjmp))
1980 output_call_frame_info (1);
1984 #endif /* .debug_frame support */
1986 /* And now, the support for symbolic debugging information. */
1987 #ifdef DWARF2_DEBUGGING_INFO
1989 extern char *getpwd PROTO((void));
1991 /* NOTE: In the comments in this file, many references are made to
1992 "Debugging Information Entries". This term is abbreviated as `DIE'
1993 throughout the remainder of this file. */
1995 /* An internal representation of the DWARF output is built, and then
1996 walked to generate the DWARF debugging info. The walk of the internal
1997 representation is done after the entire program has been compiled.
1998 The types below are used to describe the internal representation. */
2000 /* Each DIE may have a series of attribute/value pairs. Values
2001 can take on several forms. The forms that are used in this
2002 implementation are listed below. */
2009 dw_val_class_unsigned_const,
2010 dw_val_class_long_long,
2013 dw_val_class_die_ref,
2014 dw_val_class_fde_ref,
2015 dw_val_class_lbl_id,
2016 dw_val_class_lbl_offset,
2021 /* Various DIE's use offsets relative to the beginning of the
2022 .debug_info section to refer to each other. */
2024 typedef long int dw_offset;
2026 /* Define typedefs here to avoid circular dependencies. */
2028 typedef struct die_struct *dw_die_ref;
2029 typedef struct dw_attr_struct *dw_attr_ref;
2030 typedef struct dw_val_struct *dw_val_ref;
2031 typedef struct dw_line_info_struct *dw_line_info_ref;
2032 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2033 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2034 typedef struct pubname_struct *pubname_ref;
2035 typedef dw_die_ref *arange_ref;
2037 /* Describe a double word constant value. */
2039 typedef struct dw_long_long_struct
2046 /* Describe a floating point constant value. */
2048 typedef struct dw_fp_struct
2055 /* Each entry in the line_info_table maintains the file and
2056 line number associated with the label generated for that
2057 entry. The label gives the PC value associated with
2058 the line number entry. */
2060 typedef struct dw_line_info_struct
2062 unsigned long dw_file_num;
2063 unsigned long dw_line_num;
2067 /* Line information for functions in separate sections; each one gets its
2069 typedef struct dw_separate_line_info_struct
2071 unsigned long dw_file_num;
2072 unsigned long dw_line_num;
2073 unsigned long function;
2075 dw_separate_line_info_entry;
2077 /* The dw_val_node describes an attribute's value, as it is
2078 represented internally. */
2080 typedef struct dw_val_struct
2082 dw_val_class val_class;
2086 dw_loc_descr_ref val_loc;
2088 long unsigned val_unsigned;
2089 dw_long_long_const val_long_long;
2090 dw_float_const val_float;
2091 dw_die_ref val_die_ref;
2092 unsigned val_fde_index;
2095 unsigned char val_flag;
2101 /* Locations in memory are described using a sequence of stack machine
2104 typedef struct dw_loc_descr_struct
2106 dw_loc_descr_ref dw_loc_next;
2107 enum dwarf_location_atom dw_loc_opc;
2108 dw_val_node dw_loc_oprnd1;
2109 dw_val_node dw_loc_oprnd2;
2113 /* Each DIE attribute has a field specifying the attribute kind,
2114 a link to the next attribute in the chain, and an attribute value.
2115 Attributes are typically linked below the DIE they modify. */
2117 typedef struct dw_attr_struct
2119 enum dwarf_attribute dw_attr;
2120 dw_attr_ref dw_attr_next;
2121 dw_val_node dw_attr_val;
2125 /* The Debugging Information Entry (DIE) structure */
2127 typedef struct die_struct
2129 enum dwarf_tag die_tag;
2130 dw_attr_ref die_attr;
2131 dw_attr_ref die_attr_last;
2132 dw_die_ref die_parent;
2133 dw_die_ref die_child;
2134 dw_die_ref die_child_last;
2136 dw_offset die_offset;
2137 unsigned long die_abbrev;
2141 /* The pubname structure */
2143 typedef struct pubname_struct
2150 /* The limbo die list structure. */
2151 typedef struct limbo_die_struct
2154 struct limbo_die_struct *next;
2158 /* How to start an assembler comment. */
2159 #ifndef ASM_COMMENT_START
2160 #define ASM_COMMENT_START ";#"
2163 /* Define a macro which returns non-zero for a TYPE_DECL which was
2164 implicitly generated for a tagged type.
2166 Note that unlike the gcc front end (which generates a NULL named
2167 TYPE_DECL node for each complete tagged type, each array type, and
2168 each function type node created) the g++ front end generates a
2169 _named_ TYPE_DECL node for each tagged type node created.
2170 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2171 generate a DW_TAG_typedef DIE for them. */
2173 #define TYPE_DECL_IS_STUB(decl) \
2174 (DECL_NAME (decl) == NULL_TREE \
2175 || (DECL_ARTIFICIAL (decl) \
2176 && is_tagged_type (TREE_TYPE (decl)) \
2177 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2178 /* This is necessary for stub decls that \
2179 appear in nested inline functions. */ \
2180 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2181 && (decl_ultimate_origin (decl) \
2182 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2184 /* Information concerning the compilation unit's programming
2185 language, and compiler version. */
2187 extern int flag_traditional;
2188 extern char *version_string;
2189 extern char *language_string;
2191 /* Fixed size portion of the DWARF compilation unit header. */
2192 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2194 /* Fixed size portion of debugging line information prolog. */
2195 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2197 /* Fixed size portion of public names info. */
2198 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2200 /* Fixed size portion of the address range info. */
2201 #define DWARF_ARANGES_HEADER_SIZE \
2202 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2204 /* Define the architecture-dependent minimum instruction length (in bytes).
2205 In this implementation of DWARF, this field is used for information
2206 purposes only. Since GCC generates assembly language, we have
2207 no a priori knowledge of how many instruction bytes are generated
2208 for each source line, and therefore can use only the DW_LNE_set_address
2209 and DW_LNS_fixed_advance_pc line information commands. */
2211 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2212 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2215 /* Minimum line offset in a special line info. opcode.
2216 This value was chosen to give a reasonable range of values. */
2217 #define DWARF_LINE_BASE -10
2219 /* First special line opcde - leave room for the standard opcodes. */
2220 #define DWARF_LINE_OPCODE_BASE 10
2222 /* Range of line offsets in a special line info. opcode. */
2223 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2225 /* Flag that indicates the initial value of the is_stmt_start flag.
2226 In the present implementation, we do not mark any lines as
2227 the beginning of a source statement, because that information
2228 is not made available by the GCC front-end. */
2229 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2231 /* This location is used by calc_die_sizes() to keep track
2232 the offset of each DIE within the .debug_info section. */
2233 static unsigned long next_die_offset;
2235 /* Record the root of the DIE's built for the current compilation unit. */
2236 static dw_die_ref comp_unit_die;
2238 /* A list of DIEs with a NULL parent waiting to be relocated. */
2239 static limbo_die_node *limbo_die_list = 0;
2241 /* Pointer to an array of filenames referenced by this compilation unit. */
2242 static char **file_table;
2244 /* Total number of entries in the table (i.e. array) pointed to by
2245 `file_table'. This is the *total* and includes both used and unused
2247 static unsigned file_table_allocated;
2249 /* Number of entries in the file_table which are actually in use. */
2250 static unsigned file_table_in_use;
2252 /* Size (in elements) of increments by which we may expand the filename
2254 #define FILE_TABLE_INCREMENT 64
2256 /* Local pointer to the name of the main input file. Initialized in
2258 static char *primary_filename;
2260 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2261 which their beginnings are encountered. We output Dwarf debugging info
2262 that refers to the beginnings and ends of the ranges of code for each
2263 lexical block. The labels themselves are generated in final.c, which
2264 assigns numbers to the blocks in the same way. */
2265 static unsigned next_block_number = 2;
2267 /* A pointer to the base of a table of references to DIE's that describe
2268 declarations. The table is indexed by DECL_UID() which is a unique
2269 number identifying each decl. */
2270 static dw_die_ref *decl_die_table;
2272 /* Number of elements currently allocated for the decl_die_table. */
2273 static unsigned decl_die_table_allocated;
2275 /* Number of elements in decl_die_table currently in use. */
2276 static unsigned decl_die_table_in_use;
2278 /* Size (in elements) of increments by which we may expand the
2280 #define DECL_DIE_TABLE_INCREMENT 256
2282 /* Structure used for the decl_scope table. scope is the current declaration
2283 scope, and previous is the entry that is the parent of this scope. This
2284 is usually but not always the immediately preceeding entry. */
2286 typedef struct decl_scope_struct
2293 /* A pointer to the base of a table of references to declaration
2294 scopes. This table is a display which tracks the nesting
2295 of declaration scopes at the current scope and containing
2296 scopes. This table is used to find the proper place to
2297 define type declaration DIE's. */
2298 static decl_scope_node *decl_scope_table;
2300 /* Number of elements currently allocated for the decl_scope_table. */
2301 static int decl_scope_table_allocated;
2303 /* Current level of nesting of declaration scopes. */
2304 static int decl_scope_depth;
2306 /* Size (in elements) of increments by which we may expand the
2307 decl_scope_table. */
2308 #define DECL_SCOPE_TABLE_INCREMENT 64
2310 /* A pointer to the base of a list of references to DIE's that
2311 are uniquely identified by their tag, presence/absence of
2312 children DIE's, and list of attribute/value pairs. */
2313 static dw_die_ref *abbrev_die_table;
2315 /* Number of elements currently allocated for abbrev_die_table. */
2316 static unsigned abbrev_die_table_allocated;
2318 /* Number of elements in type_die_table currently in use. */
2319 static unsigned abbrev_die_table_in_use;
2321 /* Size (in elements) of increments by which we may expand the
2322 abbrev_die_table. */
2323 #define ABBREV_DIE_TABLE_INCREMENT 256
2325 /* A pointer to the base of a table that contains line information
2326 for each source code line in .text in the compilation unit. */
2327 static dw_line_info_ref line_info_table;
2329 /* Number of elements currently allocated for line_info_table. */
2330 static unsigned line_info_table_allocated;
2332 /* Number of elements in separate_line_info_table currently in use. */
2333 static unsigned separate_line_info_table_in_use;
2335 /* A pointer to the base of a table that contains line information
2336 for each source code line outside of .text in the compilation unit. */
2337 static dw_separate_line_info_ref separate_line_info_table;
2339 /* Number of elements currently allocated for separate_line_info_table. */
2340 static unsigned separate_line_info_table_allocated;
2342 /* Number of elements in line_info_table currently in use. */
2343 static unsigned line_info_table_in_use;
2345 /* Size (in elements) of increments by which we may expand the
2347 #define LINE_INFO_TABLE_INCREMENT 1024
2349 /* A pointer to the base of a table that contains a list of publicly
2350 accessible names. */
2351 static pubname_ref pubname_table;
2353 /* Number of elements currently allocated for pubname_table. */
2354 static unsigned pubname_table_allocated;
2356 /* Number of elements in pubname_table currently in use. */
2357 static unsigned pubname_table_in_use;
2359 /* Size (in elements) of increments by which we may expand the
2361 #define PUBNAME_TABLE_INCREMENT 64
2363 /* A pointer to the base of a table that contains a list of publicly
2364 accessible names. */
2365 static arange_ref arange_table;
2367 /* Number of elements currently allocated for arange_table. */
2368 static unsigned arange_table_allocated;
2370 /* Number of elements in arange_table currently in use. */
2371 static unsigned arange_table_in_use;
2373 /* Size (in elements) of increments by which we may expand the
2375 #define ARANGE_TABLE_INCREMENT 64
2377 /* A pointer to the base of a list of pending types which we haven't
2378 generated DIEs for yet, but which we will have to come back to
2381 static tree *pending_types_list;
2383 /* Number of elements currently allocated for the pending_types_list. */
2384 static unsigned pending_types_allocated;
2386 /* Number of elements of pending_types_list currently in use. */
2387 static unsigned pending_types;
2389 /* Size (in elements) of increments by which we may expand the pending
2390 types list. Actually, a single hunk of space of this size should
2391 be enough for most typical programs. */
2392 #define PENDING_TYPES_INCREMENT 64
2394 /* Record whether the function being analyzed contains inlined functions. */
2395 static int current_function_has_inlines;
2396 #if 0 && defined (MIPS_DEBUGGING_INFO)
2397 static int comp_unit_has_inlines;
2400 /* A pointer to the ..._DECL node which we have most recently been working
2401 on. We keep this around just in case something about it looks screwy and
2402 we want to tell the user what the source coordinates for the actual
2404 static tree dwarf_last_decl;
2406 /* Forward declarations for functions defined in this file. */
2408 static void addr_const_to_string PROTO((dyn_string_t, rtx));
2409 static char *addr_to_string PROTO((rtx));
2410 static int is_pseudo_reg PROTO((rtx));
2411 static tree type_main_variant PROTO((tree));
2412 static int is_tagged_type PROTO((tree));
2413 static char *dwarf_tag_name PROTO((unsigned));
2414 static char *dwarf_attr_name PROTO((unsigned));
2415 static char *dwarf_form_name PROTO((unsigned));
2416 static char *dwarf_stack_op_name PROTO((unsigned));
2418 static char *dwarf_type_encoding_name PROTO((unsigned));
2420 static tree decl_ultimate_origin PROTO((tree));
2421 static tree block_ultimate_origin PROTO((tree));
2422 static tree decl_class_context PROTO((tree));
2423 static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
2424 static void add_AT_flag PROTO((dw_die_ref,
2425 enum dwarf_attribute,
2427 static void add_AT_int PROTO((dw_die_ref,
2428 enum dwarf_attribute, long));
2429 static void add_AT_unsigned PROTO((dw_die_ref,
2430 enum dwarf_attribute,
2432 static void add_AT_long_long PROTO((dw_die_ref,
2433 enum dwarf_attribute,
2434 unsigned long, unsigned long));
2435 static void add_AT_float PROTO((dw_die_ref,
2436 enum dwarf_attribute,
2438 static void add_AT_string PROTO((dw_die_ref,
2439 enum dwarf_attribute, char *));
2440 static void add_AT_die_ref PROTO((dw_die_ref,
2441 enum dwarf_attribute,
2443 static void add_AT_fde_ref PROTO((dw_die_ref,
2444 enum dwarf_attribute,
2446 static void add_AT_loc PROTO((dw_die_ref,
2447 enum dwarf_attribute,
2449 static void add_AT_addr PROTO((dw_die_ref,
2450 enum dwarf_attribute, char *));
2451 static void add_AT_lbl_id PROTO((dw_die_ref,
2452 enum dwarf_attribute, char *));
2453 static void add_AT_lbl_offset PROTO((dw_die_ref,
2454 enum dwarf_attribute, char *));
2455 static int is_extern_subr_die PROTO((dw_die_ref));
2456 static dw_attr_ref get_AT PROTO((dw_die_ref,
2457 enum dwarf_attribute));
2458 static char *get_AT_low_pc PROTO((dw_die_ref));
2459 static char *get_AT_hi_pc PROTO((dw_die_ref));
2460 static char *get_AT_string PROTO((dw_die_ref,
2461 enum dwarf_attribute));
2462 static int get_AT_flag PROTO((dw_die_ref,
2463 enum dwarf_attribute));
2464 static unsigned get_AT_unsigned PROTO((dw_die_ref,
2465 enum dwarf_attribute));
2466 static int is_c_family PROTO((void));
2467 static int is_fortran PROTO((void));
2468 static void remove_AT PROTO((dw_die_ref,
2469 enum dwarf_attribute));
2470 static void remove_children PROTO((dw_die_ref));
2471 static void add_child_die PROTO((dw_die_ref, dw_die_ref));
2472 static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
2473 static dw_die_ref lookup_type_die PROTO((tree));
2474 static void equate_type_number_to_die PROTO((tree, dw_die_ref));
2475 static dw_die_ref lookup_decl_die PROTO((tree));
2476 static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
2477 static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
2478 unsigned long, unsigned long));
2479 static void add_loc_descr PROTO((dw_loc_descr_ref *,
2481 static void print_spaces PROTO((FILE *));
2482 static void print_die PROTO((dw_die_ref, FILE *));
2483 static void print_dwarf_line_table PROTO((FILE *));
2484 static void add_sibling_attributes PROTO((dw_die_ref));
2485 static void build_abbrev_table PROTO((dw_die_ref));
2486 static unsigned long size_of_string PROTO((char *));
2487 static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
2488 static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
2489 static int constant_size PROTO((long unsigned));
2490 static unsigned long size_of_die PROTO((dw_die_ref));
2491 static void calc_die_sizes PROTO((dw_die_ref));
2492 static unsigned long size_of_line_prolog PROTO((void));
2493 static unsigned long size_of_line_info PROTO((void));
2494 static unsigned long size_of_pubnames PROTO((void));
2495 static unsigned long size_of_aranges PROTO((void));
2496 static enum dwarf_form value_format PROTO((dw_val_ref));
2497 static void output_value_format PROTO((dw_val_ref));
2498 static void output_abbrev_section PROTO((void));
2499 static void output_loc_operands PROTO((dw_loc_descr_ref));
2500 static unsigned long sibling_offset PROTO((dw_die_ref));
2501 static void output_die PROTO((dw_die_ref));
2502 static void output_compilation_unit_header PROTO((void));
2503 static char *dwarf2_name PROTO((tree, int));
2504 static void add_pubname PROTO((tree, dw_die_ref));
2505 static void output_pubnames PROTO((void));
2506 static void add_arange PROTO((tree, dw_die_ref));
2507 static void output_aranges PROTO((void));
2508 static void output_line_info PROTO((void));
2509 static int is_body_block PROTO((tree));
2510 static dw_die_ref base_type_die PROTO((tree));
2511 static tree root_type PROTO((tree));
2512 static int is_base_type PROTO((tree));
2513 static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
2514 static int type_is_enum PROTO((tree));
2515 static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
2516 static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
2517 static int is_based_loc PROTO((rtx));
2518 static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx));
2519 static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
2520 static dw_loc_descr_ref loc_descriptor PROTO((rtx));
2521 static unsigned ceiling PROTO((unsigned, unsigned));
2522 static tree field_type PROTO((tree));
2523 static unsigned simple_type_align_in_bits PROTO((tree));
2524 static unsigned simple_type_size_in_bits PROTO((tree));
2525 static unsigned field_byte_offset PROTO((tree));
2526 static void add_AT_location_description PROTO((dw_die_ref,
2527 enum dwarf_attribute, rtx));
2528 static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
2529 static void add_const_value_attribute PROTO((dw_die_ref, rtx));
2530 static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
2531 static void add_name_attribute PROTO((dw_die_ref, char *));
2532 static void add_bound_info PROTO((dw_die_ref,
2533 enum dwarf_attribute, tree));
2534 static void add_subscript_info PROTO((dw_die_ref, tree));
2535 static void add_byte_size_attribute PROTO((dw_die_ref, tree));
2536 static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
2537 static void add_bit_size_attribute PROTO((dw_die_ref, tree));
2538 static void add_prototyped_attribute PROTO((dw_die_ref, tree));
2539 static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
2540 static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
2541 static void add_src_coords_attributes PROTO((dw_die_ref, tree));
2542 static void add_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
2543 static void push_decl_scope PROTO((tree));
2544 static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
2545 static void pop_decl_scope PROTO((void));
2546 static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
2548 static char *type_tag PROTO((tree));
2549 static tree member_declared_type PROTO((tree));
2551 static char *decl_start_label PROTO((tree));
2553 static void gen_array_type_die PROTO((tree, dw_die_ref));
2554 static void gen_set_type_die PROTO((tree, dw_die_ref));
2556 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2558 static void pend_type PROTO((tree));
2559 static void output_pending_types_for_scope PROTO((dw_die_ref));
2560 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2561 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2562 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2563 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2564 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2565 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2566 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2567 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2568 static void gen_variable_die PROTO((tree, dw_die_ref));
2569 static void gen_label_die PROTO((tree, dw_die_ref));
2570 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2571 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2572 static void gen_field_die PROTO((tree, dw_die_ref));
2573 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2574 static void gen_compile_unit_die PROTO((char *));
2575 static void gen_string_type_die PROTO((tree, dw_die_ref));
2576 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2577 static void gen_member_die PROTO((tree, dw_die_ref));
2578 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2579 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2580 static void gen_typedef_die PROTO((tree, dw_die_ref));
2581 static void gen_type_die PROTO((tree, dw_die_ref));
2582 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2583 static void gen_block_die PROTO((tree, dw_die_ref, int));
2584 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2585 static int is_redundant_typedef PROTO((tree));
2586 static void gen_decl_die PROTO((tree, dw_die_ref));
2587 static unsigned lookup_filename PROTO((char *));
2589 /* Section names used to hold DWARF debugging information. */
2590 #ifndef DEBUG_INFO_SECTION
2591 #define DEBUG_INFO_SECTION ".debug_info"
2593 #ifndef ABBREV_SECTION
2594 #define ABBREV_SECTION ".debug_abbrev"
2596 #ifndef ARANGES_SECTION
2597 #define ARANGES_SECTION ".debug_aranges"
2599 #ifndef DW_MACINFO_SECTION
2600 #define DW_MACINFO_SECTION ".debug_macinfo"
2602 #ifndef DEBUG_LINE_SECTION
2603 #define DEBUG_LINE_SECTION ".debug_line"
2606 #define LOC_SECTION ".debug_loc"
2608 #ifndef PUBNAMES_SECTION
2609 #define PUBNAMES_SECTION ".debug_pubnames"
2612 #define STR_SECTION ".debug_str"
2615 /* Standard ELF section names for compiled code and data. */
2616 #ifndef TEXT_SECTION
2617 #define TEXT_SECTION ".text"
2619 #ifndef DATA_SECTION
2620 #define DATA_SECTION ".data"
2623 #define BSS_SECTION ".bss"
2626 /* Labels we insert at beginning sections we can reference instead of
2627 the section names themselves. */
2629 #ifndef TEXT_SECTION_LABEL
2630 #define TEXT_SECTION_LABEL "Ltext"
2632 #ifndef DEBUG_LINE_SECTION_LABEL
2633 #define DEBUG_LINE_SECTION_LABEL "Ldebug_line"
2635 #ifndef DEBUG_INFO_SECTION_LABEL
2636 #define DEBUG_INFO_SECTION_LABEL "Ldebug_info"
2638 #ifndef ABBREV_SECTION_LABEL
2639 #define ABBREV_SECTION_LABEL "Ldebug_abbrev"
2643 /* Definitions of defaults for formats and names of various special
2644 (artificial) labels which may be generated within this file (when the -g
2645 options is used and DWARF_DEBUGGING_INFO is in effect.
2646 If necessary, these may be overridden from within the tm.h file, but
2647 typically, overriding these defaults is unnecessary. */
2649 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2650 static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2651 static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2652 static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2653 static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2655 #ifndef TEXT_END_LABEL
2656 #define TEXT_END_LABEL "Letext"
2658 #ifndef DATA_END_LABEL
2659 #define DATA_END_LABEL "Ledata"
2661 #ifndef BSS_END_LABEL
2662 #define BSS_END_LABEL "Lebss"
2664 #ifndef INSN_LABEL_FMT
2665 #define INSN_LABEL_FMT "LI%u_"
2667 #ifndef BLOCK_BEGIN_LABEL
2668 #define BLOCK_BEGIN_LABEL "LBB"
2670 #ifndef BLOCK_END_LABEL
2671 #define BLOCK_END_LABEL "LBE"
2673 #ifndef BODY_BEGIN_LABEL
2674 #define BODY_BEGIN_LABEL "Lbb"
2676 #ifndef BODY_END_LABEL
2677 #define BODY_END_LABEL "Lbe"
2679 #ifndef LINE_CODE_LABEL
2680 #define LINE_CODE_LABEL "LM"
2682 #ifndef SEPARATE_LINE_CODE_LABEL
2683 #define SEPARATE_LINE_CODE_LABEL "LSM"
2686 /* Convert a reference to the assembler name of a C-level name. This
2687 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2688 a string rather than writing to a file. */
2689 #ifndef ASM_NAME_TO_STRING
2690 #define ASM_NAME_TO_STRING(STR, NAME) \
2692 if ((NAME)[0] == '*') \
2693 dyn_string_append (STR, NAME + 1); \
2696 dyn_string_append (STR, user_label_prefix); \
2697 dyn_string_append (STR, NAME); \
2703 /* Convert an integer constant expression into assembler syntax. Addition
2704 and subtraction are the only arithmetic that may appear in these
2705 expressions. This is an adaptation of output_addr_const in final.c.
2706 Here, the target of the conversion is a string buffer. We can't use
2707 output_addr_const directly, because it writes to a file. */
2710 addr_const_to_string (str, x)
2717 switch (GET_CODE (x))
2721 dyn_string_append (str, ",");
2727 ASM_NAME_TO_STRING (str, XSTR (x, 0));
2731 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2732 ASM_NAME_TO_STRING (str, buf1);
2736 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2737 ASM_NAME_TO_STRING (str, buf1);
2741 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2742 dyn_string_append (str, buf1);
2746 /* This used to output parentheses around the expression, but that does
2747 not work on the 386 (either ATT or BSD assembler). */
2748 addr_const_to_string (str, XEXP (x, 0));
2752 if (GET_MODE (x) == VOIDmode)
2754 /* We can use %d if the number is one word and positive. */
2755 if (CONST_DOUBLE_HIGH (x))
2756 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2757 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2758 else if (CONST_DOUBLE_LOW (x) < 0)
2759 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2761 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2762 CONST_DOUBLE_LOW (x));
2763 dyn_string_append (str, buf1);
2766 /* We can't handle floating point constants; PRINT_OPERAND must
2768 output_operand_lossage ("floating constant misused");
2772 /* Some assemblers need integer constants to appear last (eg masm). */
2773 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2775 addr_const_to_string (str, XEXP (x, 1));
2776 if (INTVAL (XEXP (x, 0)) >= 0)
2777 dyn_string_append (str, "+");
2779 addr_const_to_string (str, XEXP (x, 0));
2783 addr_const_to_string (str, XEXP (x, 0));
2784 if (INTVAL (XEXP (x, 1)) >= 0)
2785 dyn_string_append (str, "+");
2787 addr_const_to_string (str, XEXP (x, 1));
2792 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2793 can't handle that. */
2794 x = simplify_subtraction (x);
2795 if (GET_CODE (x) != MINUS)
2798 addr_const_to_string (str, XEXP (x, 0));
2799 dyn_string_append (str, "-");
2800 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2801 && INTVAL (XEXP (x, 1)) < 0)
2803 dyn_string_append (str, ASM_OPEN_PAREN);
2804 addr_const_to_string (str, XEXP (x, 1));
2805 dyn_string_append (str, ASM_CLOSE_PAREN);
2808 addr_const_to_string (str, XEXP (x, 1));
2813 addr_const_to_string (str, XEXP (x, 0));
2817 output_operand_lossage ("invalid expression as operand");
2821 /* Convert an address constant to a string, and return a pointer to
2822 a copy of the result, located on the heap. */
2828 dyn_string_t ds = dyn_string_new (256);
2831 addr_const_to_string (ds, x);
2833 /* Return the dynamically allocated string, but free the
2834 dyn_string_t itself. */
2840 /* Test if rtl node points to a pseudo register. */
2846 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2847 || ((GET_CODE (rtl) == SUBREG)
2848 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2851 /* Return a reference to a type, with its const and volatile qualifiers
2855 type_main_variant (type)
2858 type = TYPE_MAIN_VARIANT (type);
2860 /* There really should be only one main variant among any group of variants
2861 of a given type (and all of the MAIN_VARIANT values for all members of
2862 the group should point to that one type) but sometimes the C front-end
2863 messes this up for array types, so we work around that bug here. */
2865 if (TREE_CODE (type) == ARRAY_TYPE)
2866 while (type != TYPE_MAIN_VARIANT (type))
2867 type = TYPE_MAIN_VARIANT (type);
2872 /* Return non-zero if the given type node represents a tagged type. */
2875 is_tagged_type (type)
2878 register enum tree_code code = TREE_CODE (type);
2880 return (code == RECORD_TYPE || code == UNION_TYPE
2881 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2884 /* Convert a DIE tag into its string name. */
2887 dwarf_tag_name (tag)
2888 register unsigned tag;
2892 case DW_TAG_padding:
2893 return "DW_TAG_padding";
2894 case DW_TAG_array_type:
2895 return "DW_TAG_array_type";
2896 case DW_TAG_class_type:
2897 return "DW_TAG_class_type";
2898 case DW_TAG_entry_point:
2899 return "DW_TAG_entry_point";
2900 case DW_TAG_enumeration_type:
2901 return "DW_TAG_enumeration_type";
2902 case DW_TAG_formal_parameter:
2903 return "DW_TAG_formal_parameter";
2904 case DW_TAG_imported_declaration:
2905 return "DW_TAG_imported_declaration";
2907 return "DW_TAG_label";
2908 case DW_TAG_lexical_block:
2909 return "DW_TAG_lexical_block";
2911 return "DW_TAG_member";
2912 case DW_TAG_pointer_type:
2913 return "DW_TAG_pointer_type";
2914 case DW_TAG_reference_type:
2915 return "DW_TAG_reference_type";
2916 case DW_TAG_compile_unit:
2917 return "DW_TAG_compile_unit";
2918 case DW_TAG_string_type:
2919 return "DW_TAG_string_type";
2920 case DW_TAG_structure_type:
2921 return "DW_TAG_structure_type";
2922 case DW_TAG_subroutine_type:
2923 return "DW_TAG_subroutine_type";
2924 case DW_TAG_typedef:
2925 return "DW_TAG_typedef";
2926 case DW_TAG_union_type:
2927 return "DW_TAG_union_type";
2928 case DW_TAG_unspecified_parameters:
2929 return "DW_TAG_unspecified_parameters";
2930 case DW_TAG_variant:
2931 return "DW_TAG_variant";
2932 case DW_TAG_common_block:
2933 return "DW_TAG_common_block";
2934 case DW_TAG_common_inclusion:
2935 return "DW_TAG_common_inclusion";
2936 case DW_TAG_inheritance:
2937 return "DW_TAG_inheritance";
2938 case DW_TAG_inlined_subroutine:
2939 return "DW_TAG_inlined_subroutine";
2941 return "DW_TAG_module";
2942 case DW_TAG_ptr_to_member_type:
2943 return "DW_TAG_ptr_to_member_type";
2944 case DW_TAG_set_type:
2945 return "DW_TAG_set_type";
2946 case DW_TAG_subrange_type:
2947 return "DW_TAG_subrange_type";
2948 case DW_TAG_with_stmt:
2949 return "DW_TAG_with_stmt";
2950 case DW_TAG_access_declaration:
2951 return "DW_TAG_access_declaration";
2952 case DW_TAG_base_type:
2953 return "DW_TAG_base_type";
2954 case DW_TAG_catch_block:
2955 return "DW_TAG_catch_block";
2956 case DW_TAG_const_type:
2957 return "DW_TAG_const_type";
2958 case DW_TAG_constant:
2959 return "DW_TAG_constant";
2960 case DW_TAG_enumerator:
2961 return "DW_TAG_enumerator";
2962 case DW_TAG_file_type:
2963 return "DW_TAG_file_type";
2965 return "DW_TAG_friend";
2966 case DW_TAG_namelist:
2967 return "DW_TAG_namelist";
2968 case DW_TAG_namelist_item:
2969 return "DW_TAG_namelist_item";
2970 case DW_TAG_packed_type:
2971 return "DW_TAG_packed_type";
2972 case DW_TAG_subprogram:
2973 return "DW_TAG_subprogram";
2974 case DW_TAG_template_type_param:
2975 return "DW_TAG_template_type_param";
2976 case DW_TAG_template_value_param:
2977 return "DW_TAG_template_value_param";
2978 case DW_TAG_thrown_type:
2979 return "DW_TAG_thrown_type";
2980 case DW_TAG_try_block:
2981 return "DW_TAG_try_block";
2982 case DW_TAG_variant_part:
2983 return "DW_TAG_variant_part";
2984 case DW_TAG_variable:
2985 return "DW_TAG_variable";
2986 case DW_TAG_volatile_type:
2987 return "DW_TAG_volatile_type";
2988 case DW_TAG_MIPS_loop:
2989 return "DW_TAG_MIPS_loop";
2990 case DW_TAG_format_label:
2991 return "DW_TAG_format_label";
2992 case DW_TAG_function_template:
2993 return "DW_TAG_function_template";
2994 case DW_TAG_class_template:
2995 return "DW_TAG_class_template";
2997 return "DW_TAG_<unknown>";
3001 /* Convert a DWARF attribute code into its string name. */
3004 dwarf_attr_name (attr)
3005 register unsigned attr;
3010 return "DW_AT_sibling";
3011 case DW_AT_location:
3012 return "DW_AT_location";
3014 return "DW_AT_name";
3015 case DW_AT_ordering:
3016 return "DW_AT_ordering";
3017 case DW_AT_subscr_data:
3018 return "DW_AT_subscr_data";
3019 case DW_AT_byte_size:
3020 return "DW_AT_byte_size";
3021 case DW_AT_bit_offset:
3022 return "DW_AT_bit_offset";
3023 case DW_AT_bit_size:
3024 return "DW_AT_bit_size";
3025 case DW_AT_element_list:
3026 return "DW_AT_element_list";
3027 case DW_AT_stmt_list:
3028 return "DW_AT_stmt_list";
3030 return "DW_AT_low_pc";
3032 return "DW_AT_high_pc";
3033 case DW_AT_language:
3034 return "DW_AT_language";
3036 return "DW_AT_member";
3038 return "DW_AT_discr";
3039 case DW_AT_discr_value:
3040 return "DW_AT_discr_value";
3041 case DW_AT_visibility:
3042 return "DW_AT_visibility";
3044 return "DW_AT_import";
3045 case DW_AT_string_length:
3046 return "DW_AT_string_length";
3047 case DW_AT_common_reference:
3048 return "DW_AT_common_reference";
3049 case DW_AT_comp_dir:
3050 return "DW_AT_comp_dir";
3051 case DW_AT_const_value:
3052 return "DW_AT_const_value";
3053 case DW_AT_containing_type:
3054 return "DW_AT_containing_type";
3055 case DW_AT_default_value:
3056 return "DW_AT_default_value";
3058 return "DW_AT_inline";
3059 case DW_AT_is_optional:
3060 return "DW_AT_is_optional";
3061 case DW_AT_lower_bound:
3062 return "DW_AT_lower_bound";
3063 case DW_AT_producer:
3064 return "DW_AT_producer";
3065 case DW_AT_prototyped:
3066 return "DW_AT_prototyped";
3067 case DW_AT_return_addr:
3068 return "DW_AT_return_addr";
3069 case DW_AT_start_scope:
3070 return "DW_AT_start_scope";
3071 case DW_AT_stride_size:
3072 return "DW_AT_stride_size";
3073 case DW_AT_upper_bound:
3074 return "DW_AT_upper_bound";
3075 case DW_AT_abstract_origin:
3076 return "DW_AT_abstract_origin";
3077 case DW_AT_accessibility:
3078 return "DW_AT_accessibility";
3079 case DW_AT_address_class:
3080 return "DW_AT_address_class";
3081 case DW_AT_artificial:
3082 return "DW_AT_artificial";
3083 case DW_AT_base_types:
3084 return "DW_AT_base_types";
3085 case DW_AT_calling_convention:
3086 return "DW_AT_calling_convention";
3088 return "DW_AT_count";
3089 case DW_AT_data_member_location:
3090 return "DW_AT_data_member_location";
3091 case DW_AT_decl_column:
3092 return "DW_AT_decl_column";
3093 case DW_AT_decl_file:
3094 return "DW_AT_decl_file";
3095 case DW_AT_decl_line:
3096 return "DW_AT_decl_line";
3097 case DW_AT_declaration:
3098 return "DW_AT_declaration";
3099 case DW_AT_discr_list:
3100 return "DW_AT_discr_list";
3101 case DW_AT_encoding:
3102 return "DW_AT_encoding";
3103 case DW_AT_external:
3104 return "DW_AT_external";
3105 case DW_AT_frame_base:
3106 return "DW_AT_frame_base";
3108 return "DW_AT_friend";
3109 case DW_AT_identifier_case:
3110 return "DW_AT_identifier_case";
3111 case DW_AT_macro_info:
3112 return "DW_AT_macro_info";
3113 case DW_AT_namelist_items:
3114 return "DW_AT_namelist_items";
3115 case DW_AT_priority:
3116 return "DW_AT_priority";
3118 return "DW_AT_segment";
3119 case DW_AT_specification:
3120 return "DW_AT_specification";
3121 case DW_AT_static_link:
3122 return "DW_AT_static_link";
3124 return "DW_AT_type";
3125 case DW_AT_use_location:
3126 return "DW_AT_use_location";
3127 case DW_AT_variable_parameter:
3128 return "DW_AT_variable_parameter";
3129 case DW_AT_virtuality:
3130 return "DW_AT_virtuality";
3131 case DW_AT_vtable_elem_location:
3132 return "DW_AT_vtable_elem_location";
3134 case DW_AT_MIPS_fde:
3135 return "DW_AT_MIPS_fde";
3136 case DW_AT_MIPS_loop_begin:
3137 return "DW_AT_MIPS_loop_begin";
3138 case DW_AT_MIPS_tail_loop_begin:
3139 return "DW_AT_MIPS_tail_loop_begin";
3140 case DW_AT_MIPS_epilog_begin:
3141 return "DW_AT_MIPS_epilog_begin";
3142 case DW_AT_MIPS_loop_unroll_factor:
3143 return "DW_AT_MIPS_loop_unroll_factor";
3144 case DW_AT_MIPS_software_pipeline_depth:
3145 return "DW_AT_MIPS_software_pipeline_depth";
3146 case DW_AT_MIPS_linkage_name:
3147 return "DW_AT_MIPS_linkage_name";
3148 case DW_AT_MIPS_stride:
3149 return "DW_AT_MIPS_stride";
3150 case DW_AT_MIPS_abstract_name:
3151 return "DW_AT_MIPS_abstract_name";
3152 case DW_AT_MIPS_clone_origin:
3153 return "DW_AT_MIPS_clone_origin";
3154 case DW_AT_MIPS_has_inlines:
3155 return "DW_AT_MIPS_has_inlines";
3157 case DW_AT_sf_names:
3158 return "DW_AT_sf_names";
3159 case DW_AT_src_info:
3160 return "DW_AT_src_info";
3161 case DW_AT_mac_info:
3162 return "DW_AT_mac_info";
3163 case DW_AT_src_coords:
3164 return "DW_AT_src_coords";
3165 case DW_AT_body_begin:
3166 return "DW_AT_body_begin";
3167 case DW_AT_body_end:
3168 return "DW_AT_body_end";
3170 return "DW_AT_<unknown>";
3174 /* Convert a DWARF value form code into its string name. */
3177 dwarf_form_name (form)
3178 register unsigned form;
3183 return "DW_FORM_addr";
3184 case DW_FORM_block2:
3185 return "DW_FORM_block2";
3186 case DW_FORM_block4:
3187 return "DW_FORM_block4";
3189 return "DW_FORM_data2";
3191 return "DW_FORM_data4";
3193 return "DW_FORM_data8";
3194 case DW_FORM_string:
3195 return "DW_FORM_string";
3197 return "DW_FORM_block";
3198 case DW_FORM_block1:
3199 return "DW_FORM_block1";
3201 return "DW_FORM_data1";
3203 return "DW_FORM_flag";
3205 return "DW_FORM_sdata";
3207 return "DW_FORM_strp";
3209 return "DW_FORM_udata";
3210 case DW_FORM_ref_addr:
3211 return "DW_FORM_ref_addr";
3213 return "DW_FORM_ref1";
3215 return "DW_FORM_ref2";
3217 return "DW_FORM_ref4";
3219 return "DW_FORM_ref8";
3220 case DW_FORM_ref_udata:
3221 return "DW_FORM_ref_udata";
3222 case DW_FORM_indirect:
3223 return "DW_FORM_indirect";
3225 return "DW_FORM_<unknown>";
3229 /* Convert a DWARF stack opcode into its string name. */
3232 dwarf_stack_op_name (op)
3233 register unsigned op;
3238 return "DW_OP_addr";
3240 return "DW_OP_deref";
3242 return "DW_OP_const1u";
3244 return "DW_OP_const1s";
3246 return "DW_OP_const2u";
3248 return "DW_OP_const2s";
3250 return "DW_OP_const4u";
3252 return "DW_OP_const4s";
3254 return "DW_OP_const8u";
3256 return "DW_OP_const8s";
3258 return "DW_OP_constu";
3260 return "DW_OP_consts";
3264 return "DW_OP_drop";
3266 return "DW_OP_over";
3268 return "DW_OP_pick";
3270 return "DW_OP_swap";
3274 return "DW_OP_xderef";
3282 return "DW_OP_minus";
3294 return "DW_OP_plus";
3295 case DW_OP_plus_uconst:
3296 return "DW_OP_plus_uconst";
3302 return "DW_OP_shra";
3320 return "DW_OP_skip";
3322 return "DW_OP_lit0";
3324 return "DW_OP_lit1";
3326 return "DW_OP_lit2";
3328 return "DW_OP_lit3";
3330 return "DW_OP_lit4";
3332 return "DW_OP_lit5";
3334 return "DW_OP_lit6";
3336 return "DW_OP_lit7";
3338 return "DW_OP_lit8";
3340 return "DW_OP_lit9";
3342 return "DW_OP_lit10";
3344 return "DW_OP_lit11";
3346 return "DW_OP_lit12";
3348 return "DW_OP_lit13";
3350 return "DW_OP_lit14";
3352 return "DW_OP_lit15";
3354 return "DW_OP_lit16";
3356 return "DW_OP_lit17";
3358 return "DW_OP_lit18";
3360 return "DW_OP_lit19";
3362 return "DW_OP_lit20";
3364 return "DW_OP_lit21";
3366 return "DW_OP_lit22";
3368 return "DW_OP_lit23";
3370 return "DW_OP_lit24";
3372 return "DW_OP_lit25";
3374 return "DW_OP_lit26";
3376 return "DW_OP_lit27";
3378 return "DW_OP_lit28";
3380 return "DW_OP_lit29";
3382 return "DW_OP_lit30";
3384 return "DW_OP_lit31";
3386 return "DW_OP_reg0";
3388 return "DW_OP_reg1";
3390 return "DW_OP_reg2";
3392 return "DW_OP_reg3";
3394 return "DW_OP_reg4";
3396 return "DW_OP_reg5";
3398 return "DW_OP_reg6";
3400 return "DW_OP_reg7";
3402 return "DW_OP_reg8";
3404 return "DW_OP_reg9";
3406 return "DW_OP_reg10";
3408 return "DW_OP_reg11";
3410 return "DW_OP_reg12";
3412 return "DW_OP_reg13";
3414 return "DW_OP_reg14";
3416 return "DW_OP_reg15";
3418 return "DW_OP_reg16";
3420 return "DW_OP_reg17";
3422 return "DW_OP_reg18";
3424 return "DW_OP_reg19";
3426 return "DW_OP_reg20";
3428 return "DW_OP_reg21";
3430 return "DW_OP_reg22";
3432 return "DW_OP_reg23";
3434 return "DW_OP_reg24";
3436 return "DW_OP_reg25";
3438 return "DW_OP_reg26";
3440 return "DW_OP_reg27";
3442 return "DW_OP_reg28";
3444 return "DW_OP_reg29";
3446 return "DW_OP_reg30";
3448 return "DW_OP_reg31";
3450 return "DW_OP_breg0";
3452 return "DW_OP_breg1";
3454 return "DW_OP_breg2";
3456 return "DW_OP_breg3";
3458 return "DW_OP_breg4";
3460 return "DW_OP_breg5";
3462 return "DW_OP_breg6";
3464 return "DW_OP_breg7";
3466 return "DW_OP_breg8";
3468 return "DW_OP_breg9";
3470 return "DW_OP_breg10";
3472 return "DW_OP_breg11";
3474 return "DW_OP_breg12";
3476 return "DW_OP_breg13";
3478 return "DW_OP_breg14";
3480 return "DW_OP_breg15";
3482 return "DW_OP_breg16";
3484 return "DW_OP_breg17";
3486 return "DW_OP_breg18";
3488 return "DW_OP_breg19";
3490 return "DW_OP_breg20";
3492 return "DW_OP_breg21";
3494 return "DW_OP_breg22";
3496 return "DW_OP_breg23";
3498 return "DW_OP_breg24";
3500 return "DW_OP_breg25";
3502 return "DW_OP_breg26";
3504 return "DW_OP_breg27";
3506 return "DW_OP_breg28";
3508 return "DW_OP_breg29";
3510 return "DW_OP_breg30";
3512 return "DW_OP_breg31";
3514 return "DW_OP_regx";
3516 return "DW_OP_fbreg";
3518 return "DW_OP_bregx";
3520 return "DW_OP_piece";
3521 case DW_OP_deref_size:
3522 return "DW_OP_deref_size";
3523 case DW_OP_xderef_size:
3524 return "DW_OP_xderef_size";
3528 return "OP_<unknown>";
3532 /* Convert a DWARF type code into its string name. */
3536 dwarf_type_encoding_name (enc)
3537 register unsigned enc;
3541 case DW_ATE_address:
3542 return "DW_ATE_address";
3543 case DW_ATE_boolean:
3544 return "DW_ATE_boolean";
3545 case DW_ATE_complex_float:
3546 return "DW_ATE_complex_float";
3548 return "DW_ATE_float";
3550 return "DW_ATE_signed";
3551 case DW_ATE_signed_char:
3552 return "DW_ATE_signed_char";
3553 case DW_ATE_unsigned:
3554 return "DW_ATE_unsigned";
3555 case DW_ATE_unsigned_char:
3556 return "DW_ATE_unsigned_char";
3558 return "DW_ATE_<unknown>";
3563 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3564 instance of an inlined instance of a decl which is local to an inline
3565 function, so we have to trace all of the way back through the origin chain
3566 to find out what sort of node actually served as the original seed for the
3570 decl_ultimate_origin (decl)
3573 #ifdef ENABLE_CHECKING
3574 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
3575 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
3576 most distant ancestor, this should never happen. */
3580 return DECL_ABSTRACT_ORIGIN (decl);
3583 /* Determine the "ultimate origin" of a block. The block may be an inlined
3584 instance of an inlined instance of a block which is local to an inline
3585 function, so we have to trace all of the way back through the origin chain
3586 to find out what sort of node actually served as the original seed for the
3590 block_ultimate_origin (block)
3591 register tree block;
3593 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3595 if (immediate_origin == NULL_TREE)
3599 register tree ret_val;
3600 register tree lookahead = immediate_origin;
3604 ret_val = lookahead;
3605 lookahead = (TREE_CODE (ret_val) == BLOCK)
3606 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3609 while (lookahead != NULL && lookahead != ret_val);
3615 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3616 of a virtual function may refer to a base class, so we check the 'this'
3620 decl_class_context (decl)
3623 tree context = NULL_TREE;
3625 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3626 context = DECL_CONTEXT (decl);
3628 context = TYPE_MAIN_VARIANT
3629 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3631 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3632 context = NULL_TREE;
3637 /* Add an attribute/value pair to a DIE */
3640 add_dwarf_attr (die, attr)
3641 register dw_die_ref die;
3642 register dw_attr_ref attr;
3644 if (die != NULL && attr != NULL)
3646 if (die->die_attr == NULL)
3648 die->die_attr = attr;
3649 die->die_attr_last = attr;
3653 die->die_attr_last->dw_attr_next = attr;
3654 die->die_attr_last = attr;
3659 /* Add a flag value attribute to a DIE. */
3662 add_AT_flag (die, attr_kind, flag)
3663 register dw_die_ref die;
3664 register enum dwarf_attribute attr_kind;
3665 register unsigned flag;
3667 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3669 attr->dw_attr_next = NULL;
3670 attr->dw_attr = attr_kind;
3671 attr->dw_attr_val.val_class = dw_val_class_flag;
3672 attr->dw_attr_val.v.val_flag = flag;
3673 add_dwarf_attr (die, attr);
3676 /* Add a signed integer attribute value to a DIE. */
3679 add_AT_int (die, attr_kind, int_val)
3680 register dw_die_ref die;
3681 register enum dwarf_attribute attr_kind;
3682 register long int int_val;
3684 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3686 attr->dw_attr_next = NULL;
3687 attr->dw_attr = attr_kind;
3688 attr->dw_attr_val.val_class = dw_val_class_const;
3689 attr->dw_attr_val.v.val_int = int_val;
3690 add_dwarf_attr (die, attr);
3693 /* Add an unsigned integer attribute value to a DIE. */
3696 add_AT_unsigned (die, attr_kind, unsigned_val)
3697 register dw_die_ref die;
3698 register enum dwarf_attribute attr_kind;
3699 register unsigned long unsigned_val;
3701 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3703 attr->dw_attr_next = NULL;
3704 attr->dw_attr = attr_kind;
3705 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
3706 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3707 add_dwarf_attr (die, attr);
3710 /* Add an unsigned double integer attribute value to a DIE. */
3713 add_AT_long_long (die, attr_kind, val_hi, val_low)
3714 register dw_die_ref die;
3715 register enum dwarf_attribute attr_kind;
3716 register unsigned long val_hi;
3717 register unsigned long val_low;
3719 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3721 attr->dw_attr_next = NULL;
3722 attr->dw_attr = attr_kind;
3723 attr->dw_attr_val.val_class = dw_val_class_long_long;
3724 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3725 attr->dw_attr_val.v.val_long_long.low = val_low;
3726 add_dwarf_attr (die, attr);
3729 /* Add a floating point attribute value to a DIE and return it. */
3732 add_AT_float (die, attr_kind, length, array)
3733 register dw_die_ref die;
3734 register enum dwarf_attribute attr_kind;
3735 register unsigned length;
3736 register long *array;
3738 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3740 attr->dw_attr_next = NULL;
3741 attr->dw_attr = attr_kind;
3742 attr->dw_attr_val.val_class = dw_val_class_float;
3743 attr->dw_attr_val.v.val_float.length = length;
3744 attr->dw_attr_val.v.val_float.array = array;
3745 add_dwarf_attr (die, attr);
3748 /* Add a string attribute value to a DIE. */
3751 add_AT_string (die, attr_kind, str)
3752 register dw_die_ref die;
3753 register enum dwarf_attribute attr_kind;
3756 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3758 attr->dw_attr_next = NULL;
3759 attr->dw_attr = attr_kind;
3760 attr->dw_attr_val.val_class = dw_val_class_str;
3761 attr->dw_attr_val.v.val_str = xstrdup (str);
3762 add_dwarf_attr (die, attr);
3765 /* Add a DIE reference attribute value to a DIE. */
3768 add_AT_die_ref (die, attr_kind, targ_die)
3769 register dw_die_ref die;
3770 register enum dwarf_attribute attr_kind;
3771 register dw_die_ref targ_die;
3773 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3775 attr->dw_attr_next = NULL;
3776 attr->dw_attr = attr_kind;
3777 attr->dw_attr_val.val_class = dw_val_class_die_ref;
3778 attr->dw_attr_val.v.val_die_ref = targ_die;
3779 add_dwarf_attr (die, attr);
3782 /* Add an FDE reference attribute value to a DIE. */
3785 add_AT_fde_ref (die, attr_kind, targ_fde)
3786 register dw_die_ref die;
3787 register enum dwarf_attribute attr_kind;
3788 register unsigned targ_fde;
3790 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3792 attr->dw_attr_next = NULL;
3793 attr->dw_attr = attr_kind;
3794 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
3795 attr->dw_attr_val.v.val_fde_index = targ_fde;
3796 add_dwarf_attr (die, attr);
3799 /* Add a location description attribute value to a DIE. */
3802 add_AT_loc (die, attr_kind, loc)
3803 register dw_die_ref die;
3804 register enum dwarf_attribute attr_kind;
3805 register dw_loc_descr_ref loc;
3807 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3809 attr->dw_attr_next = NULL;
3810 attr->dw_attr = attr_kind;
3811 attr->dw_attr_val.val_class = dw_val_class_loc;
3812 attr->dw_attr_val.v.val_loc = loc;
3813 add_dwarf_attr (die, attr);
3816 /* Add an address constant attribute value to a DIE. */
3819 add_AT_addr (die, attr_kind, addr)
3820 register dw_die_ref die;
3821 register enum dwarf_attribute attr_kind;
3824 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3826 attr->dw_attr_next = NULL;
3827 attr->dw_attr = attr_kind;
3828 attr->dw_attr_val.val_class = dw_val_class_addr;
3829 attr->dw_attr_val.v.val_addr = addr;
3830 add_dwarf_attr (die, attr);
3833 /* Add a label identifier attribute value to a DIE. */
3836 add_AT_lbl_id (die, attr_kind, lbl_id)
3837 register dw_die_ref die;
3838 register enum dwarf_attribute attr_kind;
3839 register char *lbl_id;
3841 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3843 attr->dw_attr_next = NULL;
3844 attr->dw_attr = attr_kind;
3845 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3846 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3847 add_dwarf_attr (die, attr);
3850 /* Add a section offset attribute value to a DIE. */
3853 add_AT_lbl_offset (die, attr_kind, label)
3854 register dw_die_ref die;
3855 register enum dwarf_attribute attr_kind;
3856 register char *label;
3858 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3860 attr->dw_attr_next = NULL;
3861 attr->dw_attr = attr_kind;
3862 attr->dw_attr_val.val_class = dw_val_class_lbl_offset;
3863 attr->dw_attr_val.v.val_lbl_id = label;
3864 add_dwarf_attr (die, attr);
3868 /* Test if die refers to an external subroutine. */
3871 is_extern_subr_die (die)
3872 register dw_die_ref die;
3874 register dw_attr_ref a;
3875 register int is_subr = FALSE;
3876 register int is_extern = FALSE;
3878 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3881 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3883 if (a->dw_attr == DW_AT_external
3884 && a->dw_attr_val.val_class == dw_val_class_flag
3885 && a->dw_attr_val.v.val_flag != 0)
3893 return is_subr && is_extern;
3896 /* Get the attribute of type attr_kind. */
3898 static inline dw_attr_ref
3899 get_AT (die, attr_kind)
3900 register dw_die_ref die;
3901 register enum dwarf_attribute attr_kind;
3903 register dw_attr_ref a;
3904 register dw_die_ref spec = NULL;
3908 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3910 if (a->dw_attr == attr_kind)
3913 if (a->dw_attr == DW_AT_specification
3914 || a->dw_attr == DW_AT_abstract_origin)
3915 spec = a->dw_attr_val.v.val_die_ref;
3919 return get_AT (spec, attr_kind);
3925 /* Return the "low pc" attribute value, typically associated with
3926 a subprogram DIE. Return null if the "low pc" attribute is
3927 either not prsent, or if it cannot be represented as an
3928 assembler label identifier. */
3930 static inline char *
3932 register dw_die_ref die;
3934 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3936 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3937 return a->dw_attr_val.v.val_lbl_id;
3942 /* Return the "high pc" attribute value, typically associated with
3943 a subprogram DIE. Return null if the "high pc" attribute is
3944 either not prsent, or if it cannot be represented as an
3945 assembler label identifier. */
3947 static inline char *
3949 register dw_die_ref die;
3951 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
3953 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3954 return a->dw_attr_val.v.val_lbl_id;
3959 /* Return the value of the string attribute designated by ATTR_KIND, or
3960 NULL if it is not present. */
3962 static inline char *
3963 get_AT_string (die, attr_kind)
3964 register dw_die_ref die;
3965 register enum dwarf_attribute attr_kind;
3967 register dw_attr_ref a = get_AT (die, attr_kind);
3969 if (a && a->dw_attr_val.val_class == dw_val_class_str)
3970 return a->dw_attr_val.v.val_str;
3975 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3976 if it is not present. */
3979 get_AT_flag (die, attr_kind)
3980 register dw_die_ref die;
3981 register enum dwarf_attribute attr_kind;
3983 register dw_attr_ref a = get_AT (die, attr_kind);
3985 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
3986 return a->dw_attr_val.v.val_flag;
3991 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3992 if it is not present. */
3994 static inline unsigned
3995 get_AT_unsigned (die, attr_kind)
3996 register dw_die_ref die;
3997 register enum dwarf_attribute attr_kind;
3999 register dw_attr_ref a = get_AT (die, attr_kind);
4001 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
4002 return a->dw_attr_val.v.val_unsigned;
4010 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4012 return (lang == DW_LANG_C || lang == DW_LANG_C89
4013 || lang == DW_LANG_C_plus_plus);
4019 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4021 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
4024 /* Remove the specified attribute if present. */
4027 remove_AT (die, attr_kind)
4028 register dw_die_ref die;
4029 register enum dwarf_attribute attr_kind;
4031 register dw_attr_ref a;
4032 register dw_attr_ref removed = NULL;;
4036 if (die->die_attr->dw_attr == attr_kind)
4038 removed = die->die_attr;
4039 if (die->die_attr_last == die->die_attr)
4040 die->die_attr_last = NULL;
4042 die->die_attr = die->die_attr->dw_attr_next;
4046 for (a = die->die_attr; a->dw_attr_next != NULL;
4047 a = a->dw_attr_next)
4048 if (a->dw_attr_next->dw_attr == attr_kind)
4050 removed = a->dw_attr_next;
4051 if (die->die_attr_last == a->dw_attr_next)
4052 die->die_attr_last = a;
4054 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4063 /* Discard the children of this DIE. */
4066 remove_children (die)
4067 register dw_die_ref die;
4069 register dw_die_ref child_die = die->die_child;
4071 die->die_child = NULL;
4072 die->die_child_last = NULL;
4074 while (child_die != NULL)
4076 register dw_die_ref tmp_die = child_die;
4077 register dw_attr_ref a;
4079 child_die = child_die->die_sib;
4081 for (a = tmp_die->die_attr; a != NULL; )
4083 register dw_attr_ref tmp_a = a;
4085 a = a->dw_attr_next;
4093 /* Add a child DIE below its parent. */
4096 add_child_die (die, child_die)
4097 register dw_die_ref die;
4098 register dw_die_ref child_die;
4100 if (die != NULL && child_die != NULL)
4102 if (die == child_die)
4104 child_die->die_parent = die;
4105 child_die->die_sib = NULL;
4107 if (die->die_child == NULL)
4109 die->die_child = child_die;
4110 die->die_child_last = child_die;
4114 die->die_child_last->die_sib = child_die;
4115 die->die_child_last = child_die;
4120 /* Return a pointer to a newly created DIE node. */
4122 static inline dw_die_ref
4123 new_die (tag_value, parent_die)
4124 register enum dwarf_tag tag_value;
4125 register dw_die_ref parent_die;
4127 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4129 die->die_tag = tag_value;
4130 die->die_abbrev = 0;
4131 die->die_offset = 0;
4132 die->die_child = NULL;
4133 die->die_parent = NULL;
4134 die->die_sib = NULL;
4135 die->die_child_last = NULL;
4136 die->die_attr = NULL;
4137 die->die_attr_last = NULL;
4139 if (parent_die != NULL)
4140 add_child_die (parent_die, die);
4143 limbo_die_node *limbo_node;
4145 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4146 limbo_node->die = die;
4147 limbo_node->next = limbo_die_list;
4148 limbo_die_list = limbo_node;
4154 /* Return the DIE associated with the given type specifier. */
4156 static inline dw_die_ref
4157 lookup_type_die (type)
4160 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4163 /* Equate a DIE to a given type specifier. */
4166 equate_type_number_to_die (type, type_die)
4168 register dw_die_ref type_die;
4170 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4173 /* Return the DIE associated with a given declaration. */
4175 static inline dw_die_ref
4176 lookup_decl_die (decl)
4179 register unsigned decl_id = DECL_UID (decl);
4181 return (decl_id < decl_die_table_in_use
4182 ? decl_die_table[decl_id] : NULL);
4185 /* Equate a DIE to a particular declaration. */
4188 equate_decl_number_to_die (decl, decl_die)
4190 register dw_die_ref decl_die;
4192 register unsigned decl_id = DECL_UID (decl);
4193 register unsigned num_allocated;
4195 if (decl_id >= decl_die_table_allocated)
4198 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4199 / DECL_DIE_TABLE_INCREMENT)
4200 * DECL_DIE_TABLE_INCREMENT;
4203 = (dw_die_ref *) xrealloc (decl_die_table,
4204 sizeof (dw_die_ref) * num_allocated);
4206 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4207 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4208 decl_die_table_allocated = num_allocated;
4211 if (decl_id >= decl_die_table_in_use)
4212 decl_die_table_in_use = (decl_id + 1);
4214 decl_die_table[decl_id] = decl_die;
4217 /* Return a pointer to a newly allocated location description. Location
4218 descriptions are simple expression terms that can be strung
4219 together to form more complicated location (address) descriptions. */
4221 static inline dw_loc_descr_ref
4222 new_loc_descr (op, oprnd1, oprnd2)
4223 register enum dwarf_location_atom op;
4224 register unsigned long oprnd1;
4225 register unsigned long oprnd2;
4227 register dw_loc_descr_ref descr
4228 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4230 descr->dw_loc_next = NULL;
4231 descr->dw_loc_opc = op;
4232 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4233 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4234 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4235 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4240 /* Add a location description term to a location description expression. */
4243 add_loc_descr (list_head, descr)
4244 register dw_loc_descr_ref *list_head;
4245 register dw_loc_descr_ref descr;
4247 register dw_loc_descr_ref *d;
4249 /* Find the end of the chain. */
4250 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4256 /* Keep track of the number of spaces used to indent the
4257 output of the debugging routines that print the structure of
4258 the DIE internal representation. */
4259 static int print_indent;
4261 /* Indent the line the number of spaces given by print_indent. */
4264 print_spaces (outfile)
4267 fprintf (outfile, "%*s", print_indent, "");
4270 /* Print the information associated with a given DIE, and its children.
4271 This routine is a debugging aid only. */
4274 print_die (die, outfile)
4278 register dw_attr_ref a;
4279 register dw_die_ref c;
4281 print_spaces (outfile);
4282 fprintf (outfile, "DIE %4lu: %s\n",
4283 die->die_offset, dwarf_tag_name (die->die_tag));
4284 print_spaces (outfile);
4285 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4286 fprintf (outfile, " offset: %lu\n", die->die_offset);
4288 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4290 print_spaces (outfile);
4291 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4293 switch (a->dw_attr_val.val_class)
4295 case dw_val_class_addr:
4296 fprintf (outfile, "address");
4298 case dw_val_class_loc:
4299 fprintf (outfile, "location descriptor");
4301 case dw_val_class_const:
4302 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4304 case dw_val_class_unsigned_const:
4305 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4307 case dw_val_class_long_long:
4308 fprintf (outfile, "constant (%lu,%lu)",
4309 a->dw_attr_val.v.val_long_long.hi,
4310 a->dw_attr_val.v.val_long_long.low);
4312 case dw_val_class_float:
4313 fprintf (outfile, "floating-point constant");
4315 case dw_val_class_flag:
4316 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4318 case dw_val_class_die_ref:
4319 if (a->dw_attr_val.v.val_die_ref != NULL)
4320 fprintf (outfile, "die -> %lu",
4321 a->dw_attr_val.v.val_die_ref->die_offset);
4323 fprintf (outfile, "die -> <null>");
4325 case dw_val_class_lbl_id:
4326 case dw_val_class_lbl_offset:
4327 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4329 case dw_val_class_str:
4330 if (a->dw_attr_val.v.val_str != NULL)
4331 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4333 fprintf (outfile, "<null>");
4339 fprintf (outfile, "\n");
4342 if (die->die_child != NULL)
4345 for (c = die->die_child; c != NULL; c = c->die_sib)
4346 print_die (c, outfile);
4352 /* Print the contents of the source code line number correspondence table.
4353 This routine is a debugging aid only. */
4356 print_dwarf_line_table (outfile)
4359 register unsigned i;
4360 register dw_line_info_ref line_info;
4362 fprintf (outfile, "\n\nDWARF source line information\n");
4363 for (i = 1; i < line_info_table_in_use; ++i)
4365 line_info = &line_info_table[i];
4366 fprintf (outfile, "%5d: ", i);
4367 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4368 fprintf (outfile, "%6ld", line_info->dw_line_num);
4369 fprintf (outfile, "\n");
4372 fprintf (outfile, "\n\n");
4375 /* Print the information collected for a given DIE. */
4378 debug_dwarf_die (die)
4381 print_die (die, stderr);
4384 /* Print all DWARF information collected for the compilation unit.
4385 This routine is a debugging aid only. */
4391 print_die (comp_unit_die, stderr);
4392 print_dwarf_line_table (stderr);
4395 /* Traverse the DIE, and add a sibling attribute if it may have the
4396 effect of speeding up access to siblings. To save some space,
4397 avoid generating sibling attributes for DIE's without children. */
4400 add_sibling_attributes(die)
4401 register dw_die_ref die;
4403 register dw_die_ref c;
4404 register dw_attr_ref attr;
4405 if (die != comp_unit_die && die->die_child != NULL)
4407 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4408 attr->dw_attr_next = NULL;
4409 attr->dw_attr = DW_AT_sibling;
4410 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4411 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4413 /* Add the sibling link to the front of the attribute list. */
4414 attr->dw_attr_next = die->die_attr;
4415 if (die->die_attr == NULL)
4416 die->die_attr_last = attr;
4418 die->die_attr = attr;
4421 for (c = die->die_child; c != NULL; c = c->die_sib)
4422 add_sibling_attributes (c);
4425 /* The format of each DIE (and its attribute value pairs)
4426 is encoded in an abbreviation table. This routine builds the
4427 abbreviation table and assigns a unique abbreviation id for
4428 each abbreviation entry. The children of each die are visited
4432 build_abbrev_table (die)
4433 register dw_die_ref die;
4435 register unsigned long abbrev_id;
4436 register unsigned long n_alloc;
4437 register dw_die_ref c;
4438 register dw_attr_ref d_attr, a_attr;
4439 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4441 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4443 if (abbrev->die_tag == die->die_tag)
4445 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4447 a_attr = abbrev->die_attr;
4448 d_attr = die->die_attr;
4450 while (a_attr != NULL && d_attr != NULL)
4452 if ((a_attr->dw_attr != d_attr->dw_attr)
4453 || (value_format (&a_attr->dw_attr_val)
4454 != value_format (&d_attr->dw_attr_val)))
4457 a_attr = a_attr->dw_attr_next;
4458 d_attr = d_attr->dw_attr_next;
4461 if (a_attr == NULL && d_attr == NULL)
4467 if (abbrev_id >= abbrev_die_table_in_use)
4469 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4471 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4473 = (dw_die_ref *) xrealloc (abbrev_die_table,
4474 sizeof (dw_die_ref) * n_alloc);
4476 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4477 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4478 abbrev_die_table_allocated = n_alloc;
4481 ++abbrev_die_table_in_use;
4482 abbrev_die_table[abbrev_id] = die;
4485 die->die_abbrev = abbrev_id;
4486 for (c = die->die_child; c != NULL; c = c->die_sib)
4487 build_abbrev_table (c);
4490 /* Return the size of a string, including the null byte.
4492 This used to treat backslashes as escapes, and hence they were not included
4493 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
4494 which treats a backslash as a backslash, escaping it if necessary, and hence
4495 we must include them in the count. */
4497 static unsigned long
4498 size_of_string (str)
4501 return strlen (str) + 1;
4504 /* Return the size of a location descriptor. */
4506 static unsigned long
4507 size_of_loc_descr (loc)
4508 register dw_loc_descr_ref loc;
4510 register unsigned long size = 1;
4512 switch (loc->dw_loc_opc)
4534 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4537 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4542 case DW_OP_plus_uconst:
4543 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4581 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4584 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4587 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4590 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4591 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4594 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4596 case DW_OP_deref_size:
4597 case DW_OP_xderef_size:
4607 /* Return the size of a series of location descriptors. */
4609 static unsigned long
4611 register dw_loc_descr_ref loc;
4613 register unsigned long size = 0;
4615 for (; loc != NULL; loc = loc->dw_loc_next)
4616 size += size_of_loc_descr (loc);
4621 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4624 constant_size (value)
4625 long unsigned value;
4632 log = floor_log2 (value);
4635 log = 1 << (floor_log2 (log) + 1);
4640 /* Return the size of a DIE, as it is represented in the
4641 .debug_info section. */
4643 static unsigned long
4645 register dw_die_ref die;
4647 register unsigned long size = 0;
4648 register dw_attr_ref a;
4650 size += size_of_uleb128 (die->die_abbrev);
4651 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4653 switch (a->dw_attr_val.val_class)
4655 case dw_val_class_addr:
4658 case dw_val_class_loc:
4660 register unsigned long lsize
4661 = size_of_locs (a->dw_attr_val.v.val_loc);
4664 size += constant_size (lsize);
4668 case dw_val_class_const:
4671 case dw_val_class_unsigned_const:
4672 size += constant_size (a->dw_attr_val.v.val_unsigned);
4674 case dw_val_class_long_long:
4675 size += 1 + 8; /* block */
4677 case dw_val_class_float:
4678 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4680 case dw_val_class_flag:
4683 case dw_val_class_die_ref:
4684 size += DWARF_OFFSET_SIZE;
4686 case dw_val_class_fde_ref:
4687 size += DWARF_OFFSET_SIZE;
4689 case dw_val_class_lbl_id:
4692 case dw_val_class_lbl_offset:
4693 size += DWARF_OFFSET_SIZE;
4695 case dw_val_class_str:
4696 size += size_of_string (a->dw_attr_val.v.val_str);
4706 /* Size the debugging information associated with a given DIE.
4707 Visits the DIE's children recursively. Updates the global
4708 variable next_die_offset, on each time through. Uses the
4709 current value of next_die_offset to update the die_offset
4710 field in each DIE. */
4713 calc_die_sizes (die)
4716 register dw_die_ref c;
4717 die->die_offset = next_die_offset;
4718 next_die_offset += size_of_die (die);
4720 for (c = die->die_child; c != NULL; c = c->die_sib)
4723 if (die->die_child != NULL)
4724 /* Count the null byte used to terminate sibling lists. */
4725 next_die_offset += 1;
4728 /* Return the size of the line information prolog generated for the
4729 compilation unit. */
4731 static unsigned long
4732 size_of_line_prolog ()
4734 register unsigned long size;
4735 register unsigned long ft_index;
4737 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4739 /* Count the size of the table giving number of args for each
4741 size += DWARF_LINE_OPCODE_BASE - 1;
4743 /* Include directory table is empty (at present). Count only the
4744 null byte used to terminate the table. */
4747 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4749 /* File name entry. */
4750 size += size_of_string (file_table[ft_index]);
4752 /* Include directory index. */
4753 size += size_of_uleb128 (0);
4755 /* Modification time. */
4756 size += size_of_uleb128 (0);
4758 /* File length in bytes. */
4759 size += size_of_uleb128 (0);
4762 /* Count the file table terminator. */
4767 /* Return the size of the line information generated for this
4768 compilation unit. */
4770 static unsigned long
4771 size_of_line_info ()
4773 register unsigned long size;
4774 register unsigned long lt_index;
4775 register unsigned long current_line;
4776 register long line_offset;
4777 register long line_delta;
4778 register unsigned long current_file;
4779 register unsigned long function;
4780 unsigned long size_of_set_address;
4782 /* Size of a DW_LNE_set_address instruction. */
4783 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4785 /* Version number. */
4788 /* Prolog length specifier. */
4789 size += DWARF_OFFSET_SIZE;
4792 size += size_of_line_prolog ();
4794 /* Set address register instruction. */
4795 size += size_of_set_address;
4799 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4801 register dw_line_info_ref line_info;
4803 /* Advance pc instruction. */
4804 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4808 size += size_of_set_address;
4810 line_info = &line_info_table[lt_index];
4811 if (line_info->dw_file_num != current_file)
4813 /* Set file number instruction. */
4815 current_file = line_info->dw_file_num;
4816 size += size_of_uleb128 (current_file);
4819 if (line_info->dw_line_num != current_line)
4821 line_offset = line_info->dw_line_num - current_line;
4822 line_delta = line_offset - DWARF_LINE_BASE;
4823 current_line = line_info->dw_line_num;
4824 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4825 /* 1-byte special line number instruction. */
4829 /* Advance line instruction. */
4831 size += size_of_sleb128 (line_offset);
4832 /* Generate line entry instruction. */
4838 /* Advance pc instruction. */
4842 size += size_of_set_address;
4844 /* End of line number info. marker. */
4845 size += 1 + size_of_uleb128 (1) + 1;
4850 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4852 register dw_separate_line_info_ref line_info
4853 = &separate_line_info_table[lt_index];
4854 if (function != line_info->function)
4856 function = line_info->function;
4857 /* Set address register instruction. */
4858 size += size_of_set_address;
4862 /* Advance pc instruction. */
4866 size += size_of_set_address;
4869 if (line_info->dw_file_num != current_file)
4871 /* Set file number instruction. */
4873 current_file = line_info->dw_file_num;
4874 size += size_of_uleb128 (current_file);
4877 if (line_info->dw_line_num != current_line)
4879 line_offset = line_info->dw_line_num - current_line;
4880 line_delta = line_offset - DWARF_LINE_BASE;
4881 current_line = line_info->dw_line_num;
4882 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4883 /* 1-byte special line number instruction. */
4887 /* Advance line instruction. */
4889 size += size_of_sleb128 (line_offset);
4891 /* Generate line entry instruction. */
4898 /* If we're done with a function, end its sequence. */
4899 if (lt_index == separate_line_info_table_in_use
4900 || separate_line_info_table[lt_index].function != function)
4905 /* Advance pc instruction. */
4909 size += size_of_set_address;
4911 /* End of line number info. marker. */
4912 size += 1 + size_of_uleb128 (1) + 1;
4919 /* Return the size of the .debug_pubnames table generated for the
4920 compilation unit. */
4922 static unsigned long
4925 register unsigned long size;
4926 register unsigned i;
4928 size = DWARF_PUBNAMES_HEADER_SIZE;
4929 for (i = 0; i < pubname_table_in_use; ++i)
4931 register pubname_ref p = &pubname_table[i];
4932 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4935 size += DWARF_OFFSET_SIZE;
4939 /* Return the size of the information in the .debug_aranges section. */
4941 static unsigned long
4944 register unsigned long size;
4946 size = DWARF_ARANGES_HEADER_SIZE;
4948 /* Count the address/length pair for this compilation unit. */
4949 size += 2 * PTR_SIZE;
4950 size += 2 * PTR_SIZE * arange_table_in_use;
4952 /* Count the two zero words used to terminated the address range table. */
4953 size += 2 * PTR_SIZE;
4957 /* Select the encoding of an attribute value. */
4959 static enum dwarf_form
4963 switch (v->val_class)
4965 case dw_val_class_addr:
4966 return DW_FORM_addr;
4967 case dw_val_class_loc:
4968 switch (constant_size (size_of_locs (v->v.val_loc)))
4971 return DW_FORM_block1;
4973 return DW_FORM_block2;
4977 case dw_val_class_const:
4978 return DW_FORM_data4;
4979 case dw_val_class_unsigned_const:
4980 switch (constant_size (v->v.val_unsigned))
4983 return DW_FORM_data1;
4985 return DW_FORM_data2;
4987 return DW_FORM_data4;
4989 return DW_FORM_data8;
4993 case dw_val_class_long_long:
4994 return DW_FORM_block1;
4995 case dw_val_class_float:
4996 return DW_FORM_block1;
4997 case dw_val_class_flag:
4998 return DW_FORM_flag;
4999 case dw_val_class_die_ref:
5001 case dw_val_class_fde_ref:
5002 return DW_FORM_data;
5003 case dw_val_class_lbl_id:
5004 return DW_FORM_addr;
5005 case dw_val_class_lbl_offset:
5006 return DW_FORM_data;
5007 case dw_val_class_str:
5008 return DW_FORM_string;
5014 /* Output the encoding of an attribute value. */
5017 output_value_format (v)
5020 enum dwarf_form form = value_format (v);
5022 output_uleb128 (form);
5024 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
5026 fputc ('\n', asm_out_file);
5029 /* Output the .debug_abbrev section which defines the DIE abbreviation
5033 output_abbrev_section ()
5035 unsigned long abbrev_id;
5038 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5040 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5042 output_uleb128 (abbrev_id);
5044 fprintf (asm_out_file, " (abbrev code)");
5046 fputc ('\n', asm_out_file);
5047 output_uleb128 (abbrev->die_tag);
5049 fprintf (asm_out_file, " (TAG: %s)",
5050 dwarf_tag_name (abbrev->die_tag));
5052 fputc ('\n', asm_out_file);
5053 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5054 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5057 fprintf (asm_out_file, "\t%s %s",
5059 (abbrev->die_child != NULL
5060 ? "DW_children_yes" : "DW_children_no"));
5062 fputc ('\n', asm_out_file);
5064 for (a_attr = abbrev->die_attr; a_attr != NULL;
5065 a_attr = a_attr->dw_attr_next)
5067 output_uleb128 (a_attr->dw_attr);
5069 fprintf (asm_out_file, " (%s)",
5070 dwarf_attr_name (a_attr->dw_attr));
5072 fputc ('\n', asm_out_file);
5073 output_value_format (&a_attr->dw_attr_val);
5076 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5080 /* Output location description stack opcode's operands (if any). */
5083 output_loc_operands (loc)
5084 register dw_loc_descr_ref loc;
5086 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5087 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5089 switch (loc->dw_loc_opc)
5092 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5093 fputc ('\n', asm_out_file);
5097 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5098 fputc ('\n', asm_out_file);
5102 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5103 fputc ('\n', asm_out_file);
5107 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5108 fputc ('\n', asm_out_file);
5113 fputc ('\n', asm_out_file);
5116 output_uleb128 (val1->v.val_unsigned);
5117 fputc ('\n', asm_out_file);
5120 output_sleb128 (val1->v.val_int);
5121 fputc ('\n', asm_out_file);
5124 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5125 fputc ('\n', asm_out_file);
5127 case DW_OP_plus_uconst:
5128 output_uleb128 (val1->v.val_unsigned);
5129 fputc ('\n', asm_out_file);
5133 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5134 fputc ('\n', asm_out_file);
5168 output_sleb128 (val1->v.val_int);
5169 fputc ('\n', asm_out_file);
5172 output_uleb128 (val1->v.val_unsigned);
5173 fputc ('\n', asm_out_file);
5176 output_sleb128 (val1->v.val_int);
5177 fputc ('\n', asm_out_file);
5180 output_uleb128 (val1->v.val_unsigned);
5181 fputc ('\n', asm_out_file);
5182 output_sleb128 (val2->v.val_int);
5183 fputc ('\n', asm_out_file);
5186 output_uleb128 (val1->v.val_unsigned);
5187 fputc ('\n', asm_out_file);
5189 case DW_OP_deref_size:
5190 case DW_OP_xderef_size:
5191 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5192 fputc ('\n', asm_out_file);
5199 /* Compute the offset of a sibling. */
5201 static unsigned long
5202 sibling_offset (die)
5205 unsigned long offset;
5207 if (die->die_child_last == NULL)
5208 offset = die->die_offset + size_of_die (die);
5210 offset = sibling_offset (die->die_child_last) + 1;
5215 /* Output the DIE and its attributes. Called recursively to generate
5216 the definitions of each child DIE. */
5220 register dw_die_ref die;
5222 register dw_attr_ref a;
5223 register dw_die_ref c;
5224 register unsigned long ref_offset;
5225 register unsigned long size;
5226 register dw_loc_descr_ref loc;
5228 output_uleb128 (die->die_abbrev);
5230 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5231 die->die_offset, dwarf_tag_name (die->die_tag));
5233 fputc ('\n', asm_out_file);
5235 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5237 switch (a->dw_attr_val.val_class)
5239 case dw_val_class_addr:
5240 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5241 a->dw_attr_val.v.val_addr);
5244 case dw_val_class_loc:
5245 size = size_of_locs (a->dw_attr_val.v.val_loc);
5247 /* Output the block length for this list of location operations. */
5248 switch (constant_size (size))
5251 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5254 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5261 fprintf (asm_out_file, "\t%s %s",
5262 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5264 fputc ('\n', asm_out_file);
5265 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5266 loc = loc->dw_loc_next)
5268 /* Output the opcode. */
5269 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5271 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5272 dwarf_stack_op_name (loc->dw_loc_opc));
5274 fputc ('\n', asm_out_file);
5276 /* Output the operand(s) (if any). */
5277 output_loc_operands (loc);
5281 case dw_val_class_const:
5282 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5285 case dw_val_class_unsigned_const:
5286 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5289 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5290 a->dw_attr_val.v.val_unsigned);
5293 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5294 a->dw_attr_val.v.val_unsigned);
5297 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5298 a->dw_attr_val.v.val_unsigned);
5301 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5302 a->dw_attr_val.v.val_long_long.hi,
5303 a->dw_attr_val.v.val_long_long.low);
5310 case dw_val_class_long_long:
5311 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5313 fprintf (asm_out_file, "\t%s %s",
5314 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5316 fputc ('\n', asm_out_file);
5317 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5318 a->dw_attr_val.v.val_long_long.hi,
5319 a->dw_attr_val.v.val_long_long.low);
5322 fprintf (asm_out_file,
5323 "\t%s long long constant", ASM_COMMENT_START);
5325 fputc ('\n', asm_out_file);
5328 case dw_val_class_float:
5330 register unsigned int i;
5331 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5332 a->dw_attr_val.v.val_float.length * 4);
5334 fprintf (asm_out_file, "\t%s %s",
5335 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5337 fputc ('\n', asm_out_file);
5338 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5340 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5341 a->dw_attr_val.v.val_float.array[i]);
5343 fprintf (asm_out_file, "\t%s fp constant word %u",
5344 ASM_COMMENT_START, i);
5346 fputc ('\n', asm_out_file);
5351 case dw_val_class_flag:
5352 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5355 case dw_val_class_die_ref:
5356 if (a->dw_attr_val.v.val_die_ref != NULL)
5357 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5358 else if (a->dw_attr == DW_AT_sibling)
5359 ref_offset = sibling_offset(die);
5363 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5366 case dw_val_class_fde_ref:
5369 ASM_GENERATE_INTERNAL_LABEL
5370 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5371 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5372 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5376 case dw_val_class_lbl_id:
5377 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5380 case dw_val_class_lbl_offset:
5381 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5384 case dw_val_class_str:
5386 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5388 ASM_OUTPUT_ASCII (asm_out_file,
5389 a->dw_attr_val.v.val_str,
5390 (int) strlen (a->dw_attr_val.v.val_str) + 1);
5397 if (a->dw_attr_val.val_class != dw_val_class_loc
5398 && a->dw_attr_val.val_class != dw_val_class_long_long
5399 && a->dw_attr_val.val_class != dw_val_class_float)
5402 fprintf (asm_out_file, "\t%s %s",
5403 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5405 fputc ('\n', asm_out_file);
5409 for (c = die->die_child; c != NULL; c = c->die_sib)
5412 if (die->die_child != NULL)
5414 /* Add null byte to terminate sibling list. */
5415 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5417 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5418 ASM_COMMENT_START, die->die_offset);
5420 fputc ('\n', asm_out_file);
5424 /* Output the compilation unit that appears at the beginning of the
5425 .debug_info section, and precedes the DIE descriptions. */
5428 output_compilation_unit_header ()
5430 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5432 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5435 fputc ('\n', asm_out_file);
5436 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5438 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5440 fputc ('\n', asm_out_file);
5441 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, abbrev_section_label);
5443 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5446 fputc ('\n', asm_out_file);
5447 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5449 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5451 fputc ('\n', asm_out_file);
5454 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5455 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5456 argument list, and maybe the scope. */
5459 dwarf2_name (decl, scope)
5463 return (*decl_printable_name) (decl, scope ? 1 : 0);
5466 /* Add a new entry to .debug_pubnames if appropriate. */
5469 add_pubname (decl, die)
5475 if (! TREE_PUBLIC (decl))
5478 if (pubname_table_in_use == pubname_table_allocated)
5480 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5481 pubname_table = (pubname_ref) xrealloc
5482 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5485 p = &pubname_table[pubname_table_in_use++];
5488 p->name = xstrdup (dwarf2_name (decl, 1));
5491 /* Output the public names table used to speed up access to externally
5492 visible names. For now, only generate entries for externally
5493 visible procedures. */
5498 register unsigned i;
5499 register unsigned long pubnames_length = size_of_pubnames ();
5501 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5504 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5507 fputc ('\n', asm_out_file);
5508 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5511 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5513 fputc ('\n', asm_out_file);
5514 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5516 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5519 fputc ('\n', asm_out_file);
5520 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5522 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5524 fputc ('\n', asm_out_file);
5525 for (i = 0; i < pubname_table_in_use; ++i)
5527 register pubname_ref pub = &pubname_table[i];
5529 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5531 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5533 fputc ('\n', asm_out_file);
5537 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5538 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5542 ASM_OUTPUT_ASCII (asm_out_file, pub->name,
5543 (int) strlen (pub->name) + 1);
5546 fputc ('\n', asm_out_file);
5549 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5550 fputc ('\n', asm_out_file);
5553 /* Add a new entry to .debug_aranges if appropriate. */
5556 add_arange (decl, die)
5560 if (! DECL_SECTION_NAME (decl))
5563 if (arange_table_in_use == arange_table_allocated)
5565 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5567 = (arange_ref) xrealloc (arange_table,
5568 arange_table_allocated * sizeof (dw_die_ref));
5571 arange_table[arange_table_in_use++] = die;
5574 /* Output the information that goes into the .debug_aranges table.
5575 Namely, define the beginning and ending address range of the
5576 text section generated for this compilation unit. */
5581 register unsigned i;
5582 register unsigned long aranges_length = size_of_aranges ();
5584 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5586 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5589 fputc ('\n', asm_out_file);
5590 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5592 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5594 fputc ('\n', asm_out_file);
5595 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5597 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5600 fputc ('\n', asm_out_file);
5601 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5603 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5605 fputc ('\n', asm_out_file);
5606 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5608 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5611 fputc ('\n', asm_out_file);
5612 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
5614 fprintf (asm_out_file, ",0,0");
5617 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5618 ASM_COMMENT_START, 2 * PTR_SIZE);
5620 fputc ('\n', asm_out_file);
5621 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_section_label);
5623 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5625 fputc ('\n', asm_out_file);
5626 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5627 text_section_label);
5629 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5631 fputc ('\n', asm_out_file);
5632 for (i = 0; i < arange_table_in_use; ++i)
5634 dw_die_ref a = arange_table[i];
5636 if (a->die_tag == DW_TAG_subprogram)
5637 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
5640 char *name = get_AT_string (a, DW_AT_MIPS_linkage_name);
5642 name = get_AT_string (a, DW_AT_name);
5644 ASM_OUTPUT_DWARF_ADDR (asm_out_file, name);
5648 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5650 fputc ('\n', asm_out_file);
5651 if (a->die_tag == DW_TAG_subprogram)
5652 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
5655 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5656 get_AT_unsigned (a, DW_AT_byte_size));
5659 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5661 fputc ('\n', asm_out_file);
5664 /* Output the terminator words. */
5665 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5666 fputc ('\n', asm_out_file);
5667 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5668 fputc ('\n', asm_out_file);
5671 /* Output the source line number correspondence information. This
5672 information goes into the .debug_line section.
5674 If the format of this data changes, then the function size_of_line_info
5675 must also be adjusted the same way. */
5680 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5681 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5682 register unsigned opc;
5683 register unsigned n_op_args;
5684 register unsigned long ft_index;
5685 register unsigned long lt_index;
5686 register unsigned long current_line;
5687 register long line_offset;
5688 register long line_delta;
5689 register unsigned long current_file;
5690 register unsigned long function;
5692 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5694 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5697 fputc ('\n', asm_out_file);
5698 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5700 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5702 fputc ('\n', asm_out_file);
5703 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5705 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5707 fputc ('\n', asm_out_file);
5708 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5710 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5713 fputc ('\n', asm_out_file);
5714 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5716 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5719 fputc ('\n', asm_out_file);
5720 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5722 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5725 fputc ('\n', asm_out_file);
5726 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5728 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5731 fputc ('\n', asm_out_file);
5732 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5734 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5736 fputc ('\n', asm_out_file);
5737 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5741 case DW_LNS_advance_pc:
5742 case DW_LNS_advance_line:
5743 case DW_LNS_set_file:
5744 case DW_LNS_set_column:
5745 case DW_LNS_fixed_advance_pc:
5752 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5754 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5755 ASM_COMMENT_START, opc, n_op_args);
5756 fputc ('\n', asm_out_file);
5760 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5762 /* Include directory table is empty, at present */
5763 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5764 fputc ('\n', asm_out_file);
5766 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5768 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5772 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5773 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5774 ASM_COMMENT_START, ft_index);
5778 ASM_OUTPUT_ASCII (asm_out_file,
5779 file_table[ft_index],
5780 (int) strlen (file_table[ft_index]) + 1);
5783 fputc ('\n', asm_out_file);
5785 /* Include directory index */
5787 fputc ('\n', asm_out_file);
5789 /* Modification time */
5791 fputc ('\n', asm_out_file);
5793 /* File length in bytes */
5795 fputc ('\n', asm_out_file);
5798 /* Terminate the file name table */
5799 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5800 fputc ('\n', asm_out_file);
5802 /* Set the address register to the first location in the text section */
5803 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5805 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5807 fputc ('\n', asm_out_file);
5808 output_uleb128 (1 + PTR_SIZE);
5809 fputc ('\n', asm_out_file);
5810 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5811 fputc ('\n', asm_out_file);
5812 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_section_label);
5813 fputc ('\n', asm_out_file);
5815 /* Generate the line number to PC correspondence table, encoded as
5816 a series of state machine operations. */
5819 strcpy (prev_line_label, text_section_label);
5820 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5822 register dw_line_info_ref line_info;
5824 /* Emit debug info for the address of the current line, choosing
5825 the encoding that uses the least amount of space. */
5826 /* ??? Unfortunately, we have little choice here currently, and must
5827 always use the most general form. Gcc does not know the address
5828 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5829 dwarf2 aware assemblers at this time, so we can't use any special
5830 pseudo ops that would allow the assembler to optimally encode this for
5831 us. Many ports do have length attributes which will give an upper
5832 bound on the address range. We could perhaps use length attributes
5833 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5834 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5837 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5838 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5840 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5843 fputc ('\n', asm_out_file);
5844 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5845 fputc ('\n', asm_out_file);
5849 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5850 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5852 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5854 fputc ('\n', asm_out_file);
5855 output_uleb128 (1 + PTR_SIZE);
5856 fputc ('\n', asm_out_file);
5857 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5858 fputc ('\n', asm_out_file);
5859 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5860 fputc ('\n', asm_out_file);
5862 strcpy (prev_line_label, line_label);
5864 /* Emit debug info for the source file of the current line, if
5865 different from the previous line. */
5866 line_info = &line_info_table[lt_index];
5867 if (line_info->dw_file_num != current_file)
5869 current_file = line_info->dw_file_num;
5870 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5872 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5874 fputc ('\n', asm_out_file);
5875 output_uleb128 (current_file);
5877 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5879 fputc ('\n', asm_out_file);
5882 /* Emit debug info for the current line number, choosing the encoding
5883 that uses the least amount of space. */
5884 line_offset = line_info->dw_line_num - current_line;
5885 line_delta = line_offset - DWARF_LINE_BASE;
5886 current_line = line_info->dw_line_num;
5887 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5889 /* This can handle deltas from -10 to 234, using the current
5890 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5892 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5893 DWARF_LINE_OPCODE_BASE + line_delta);
5895 fprintf (asm_out_file,
5896 "\t%s line %ld", ASM_COMMENT_START, current_line);
5898 fputc ('\n', asm_out_file);
5902 /* This can handle any delta. This takes at least 4 bytes, depending
5903 on the value being encoded. */
5904 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5906 fprintf (asm_out_file, "\t%s advance to line %ld",
5907 ASM_COMMENT_START, current_line);
5909 fputc ('\n', asm_out_file);
5910 output_sleb128 (line_offset);
5911 fputc ('\n', asm_out_file);
5912 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5913 fputc ('\n', asm_out_file);
5917 /* Emit debug info for the address of the end of the function. */
5920 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5922 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5925 fputc ('\n', asm_out_file);
5926 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
5927 fputc ('\n', asm_out_file);
5931 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5933 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5934 fputc ('\n', asm_out_file);
5935 output_uleb128 (1 + PTR_SIZE);
5936 fputc ('\n', asm_out_file);
5937 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5938 fputc ('\n', asm_out_file);
5939 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
5940 fputc ('\n', asm_out_file);
5943 /* Output the marker for the end of the line number info. */
5944 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5946 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
5948 fputc ('\n', asm_out_file);
5950 fputc ('\n', asm_out_file);
5951 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
5952 fputc ('\n', asm_out_file);
5957 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
5959 register dw_separate_line_info_ref line_info
5960 = &separate_line_info_table[lt_index];
5962 /* Emit debug info for the address of the current line. If this is
5963 a new function, or the first line of a function, then we need
5964 to handle it differently. */
5965 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
5967 if (function != line_info->function)
5969 function = line_info->function;
5971 /* Set the address register to the first line in the function */
5972 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5974 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5977 fputc ('\n', asm_out_file);
5978 output_uleb128 (1 + PTR_SIZE);
5979 fputc ('\n', asm_out_file);
5980 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5981 fputc ('\n', asm_out_file);
5982 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5983 fputc ('\n', asm_out_file);
5987 /* ??? See the DW_LNS_advance_pc comment above. */
5990 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5992 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5995 fputc ('\n', asm_out_file);
5996 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
5998 fputc ('\n', asm_out_file);
6002 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6004 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6006 fputc ('\n', asm_out_file);
6007 output_uleb128 (1 + PTR_SIZE);
6008 fputc ('\n', asm_out_file);
6009 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6010 fputc ('\n', asm_out_file);
6011 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6012 fputc ('\n', asm_out_file);
6015 strcpy (prev_line_label, line_label);
6017 /* Emit debug info for the source file of the current line, if
6018 different from the previous line. */
6019 if (line_info->dw_file_num != current_file)
6021 current_file = line_info->dw_file_num;
6022 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
6024 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
6026 fputc ('\n', asm_out_file);
6027 output_uleb128 (current_file);
6029 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
6031 fputc ('\n', asm_out_file);
6034 /* Emit debug info for the current line number, choosing the encoding
6035 that uses the least amount of space. */
6036 if (line_info->dw_line_num != current_line)
6038 line_offset = line_info->dw_line_num - current_line;
6039 line_delta = line_offset - DWARF_LINE_BASE;
6040 current_line = line_info->dw_line_num;
6041 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6043 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6044 DWARF_LINE_OPCODE_BASE + line_delta);
6046 fprintf (asm_out_file,
6047 "\t%s line %ld", ASM_COMMENT_START, current_line);
6049 fputc ('\n', asm_out_file);
6053 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6055 fprintf (asm_out_file, "\t%s advance to line %ld",
6056 ASM_COMMENT_START, current_line);
6058 fputc ('\n', asm_out_file);
6059 output_sleb128 (line_offset);
6060 fputc ('\n', asm_out_file);
6061 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6062 fputc ('\n', asm_out_file);
6068 /* If we're done with a function, end its sequence. */
6069 if (lt_index == separate_line_info_table_in_use
6070 || separate_line_info_table[lt_index].function != function)
6075 /* Emit debug info for the address of the end of the function. */
6076 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6079 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6081 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6084 fputc ('\n', asm_out_file);
6085 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6087 fputc ('\n', asm_out_file);
6091 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6093 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6095 fputc ('\n', asm_out_file);
6096 output_uleb128 (1 + PTR_SIZE);
6097 fputc ('\n', asm_out_file);
6098 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6099 fputc ('\n', asm_out_file);
6100 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6101 fputc ('\n', asm_out_file);
6104 /* Output the marker for the end of this sequence. */
6105 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6107 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6110 fputc ('\n', asm_out_file);
6112 fputc ('\n', asm_out_file);
6113 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6114 fputc ('\n', asm_out_file);
6119 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6120 in question represents the outermost pair of curly braces (i.e. the "body
6121 block") of a function or method.
6123 For any BLOCK node representing a "body block" of a function or method, the
6124 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6125 represents the outermost (function) scope for the function or method (i.e.
6126 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6127 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6130 is_body_block (stmt)
6133 if (TREE_CODE (stmt) == BLOCK)
6135 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6137 if (TREE_CODE (parent) == BLOCK)
6139 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6141 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6149 /* Given a pointer to a tree node for some base type, return a pointer to
6150 a DIE that describes the given type.
6152 This routine must only be called for GCC type nodes that correspond to
6153 Dwarf base (fundamental) types. */
6156 base_type_die (type)
6159 register dw_die_ref base_type_result;
6160 register char *type_name;
6161 register enum dwarf_type encoding;
6162 register tree name = TYPE_NAME (type);
6164 if (TREE_CODE (type) == ERROR_MARK
6165 || TREE_CODE (type) == VOID_TYPE)
6168 if (TREE_CODE (name) == TYPE_DECL)
6169 name = DECL_NAME (name);
6170 type_name = IDENTIFIER_POINTER (name);
6172 switch (TREE_CODE (type))
6175 /* Carefully distinguish the C character types, without messing
6176 up if the language is not C. Note that we check only for the names
6177 that contain spaces; other names might occur by coincidence in other
6179 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6180 && (type == char_type_node
6181 || ! strcmp (type_name, "signed char")
6182 || ! strcmp (type_name, "unsigned char"))))
6184 if (TREE_UNSIGNED (type))
6185 encoding = DW_ATE_unsigned;
6187 encoding = DW_ATE_signed;
6190 /* else fall through */
6193 /* GNU Pascal/Ada CHAR type. Not used in C. */
6194 if (TREE_UNSIGNED (type))
6195 encoding = DW_ATE_unsigned_char;
6197 encoding = DW_ATE_signed_char;
6201 encoding = DW_ATE_float;
6205 encoding = DW_ATE_complex_float;
6209 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6210 encoding = DW_ATE_boolean;
6214 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6217 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6218 add_AT_string (base_type_result, DW_AT_name, type_name);
6219 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6220 int_size_in_bytes (type));
6221 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6223 return base_type_result;
6226 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6227 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6228 a given type is generally the same as the given type, except that if the
6229 given type is a pointer or reference type, then the root type of the given
6230 type is the root type of the "basis" type for the pointer or reference
6231 type. (This definition of the "root" type is recursive.) Also, the root
6232 type of a `const' qualified type or a `volatile' qualified type is the
6233 root type of the given type without the qualifiers. */
6239 if (TREE_CODE (type) == ERROR_MARK)
6240 return error_mark_node;
6242 switch (TREE_CODE (type))
6245 return error_mark_node;
6248 case REFERENCE_TYPE:
6249 return type_main_variant (root_type (TREE_TYPE (type)));
6252 return type_main_variant (type);
6256 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6257 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6263 switch (TREE_CODE (type))
6278 case QUAL_UNION_TYPE:
6283 case REFERENCE_TYPE:
6296 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6297 entry that chains various modifiers in front of the given type. */
6300 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6302 register int is_const_type;
6303 register int is_volatile_type;
6304 register dw_die_ref context_die;
6306 register enum tree_code code = TREE_CODE (type);
6307 register dw_die_ref mod_type_die = NULL;
6308 register dw_die_ref sub_die = NULL;
6309 register tree item_type = NULL;
6311 if (code != ERROR_MARK)
6313 type = build_type_variant (type, is_const_type, is_volatile_type);
6315 mod_type_die = lookup_type_die (type);
6317 return mod_type_die;
6319 /* Handle C typedef types. */
6320 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6321 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6323 tree dtype = TREE_TYPE (TYPE_NAME (type));
6326 /* For a named type, use the typedef. */
6327 gen_type_die (type, context_die);
6328 mod_type_die = lookup_type_die (type);
6331 else if (is_const_type < TYPE_READONLY (dtype)
6332 || is_volatile_type < TYPE_VOLATILE (dtype))
6333 /* cv-unqualified version of named type. Just use the unnamed
6334 type to which it refers. */
6336 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6337 is_const_type, is_volatile_type,
6339 /* Else cv-qualified version of named type; fall through. */
6344 else if (is_const_type)
6346 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6347 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6349 else if (is_volatile_type)
6351 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6352 sub_die = modified_type_die (type, 0, 0, context_die);
6354 else if (code == POINTER_TYPE)
6356 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6357 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6359 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6361 item_type = TREE_TYPE (type);
6363 else if (code == REFERENCE_TYPE)
6365 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6366 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6368 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6370 item_type = TREE_TYPE (type);
6372 else if (is_base_type (type))
6373 mod_type_die = base_type_die (type);
6376 gen_type_die (type, context_die);
6378 /* We have to get the type_main_variant here (and pass that to the
6379 `lookup_type_die' routine) because the ..._TYPE node we have
6380 might simply be a *copy* of some original type node (where the
6381 copy was created to help us keep track of typedef names) and
6382 that copy might have a different TYPE_UID from the original
6384 mod_type_die = lookup_type_die (type_main_variant (type));
6385 if (mod_type_die == NULL)
6390 equate_type_number_to_die (type, mod_type_die);
6392 /* We must do this after the equate_type_number_to_die call, in case
6393 this is a recursive type. This ensures that the modified_type_die
6394 recursion will terminate even if the type is recursive. Recursive
6395 types are possible in Ada. */
6396 sub_die = modified_type_die (item_type,
6397 TYPE_READONLY (item_type),
6398 TYPE_VOLATILE (item_type),
6401 if (sub_die != NULL)
6402 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6404 return mod_type_die;
6407 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6408 an enumerated type. */
6414 return TREE_CODE (type) == ENUMERAL_TYPE;
6417 /* Return a location descriptor that designates a machine register. */
6419 static dw_loc_descr_ref
6420 reg_loc_descriptor (rtl)
6423 register dw_loc_descr_ref loc_result = NULL;
6424 register unsigned reg = reg_number (rtl);
6427 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6429 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6434 /* Return a location descriptor that designates a base+offset location. */
6436 static dw_loc_descr_ref
6437 based_loc_descr (reg, offset)
6441 register dw_loc_descr_ref loc_result;
6442 /* For the "frame base", we use the frame pointer or stack pointer
6443 registers, since the RTL for local variables is relative to one of
6445 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6446 ? HARD_FRAME_POINTER_REGNUM
6447 : STACK_POINTER_REGNUM);
6450 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6452 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6454 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6459 /* Return true if this RTL expression describes a base+offset calculation. */
6465 return (GET_CODE (rtl) == PLUS
6466 && ((GET_CODE (XEXP (rtl, 0)) == REG
6467 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6470 /* The following routine converts the RTL for a variable or parameter
6471 (resident in memory) into an equivalent Dwarf representation of a
6472 mechanism for getting the address of that same variable onto the top of a
6473 hypothetical "address evaluation" stack.
6475 When creating memory location descriptors, we are effectively transforming
6476 the RTL for a memory-resident object into its Dwarf postfix expression
6477 equivalent. This routine recursively descends an RTL tree, turning
6478 it into Dwarf postfix code as it goes. */
6480 static dw_loc_descr_ref
6481 mem_loc_descriptor (rtl)
6484 dw_loc_descr_ref mem_loc_result = NULL;
6485 /* Note that for a dynamically sized array, the location we will generate a
6486 description of here will be the lowest numbered location which is
6487 actually within the array. That's *not* necessarily the same as the
6488 zeroth element of the array. */
6490 switch (GET_CODE (rtl))
6493 /* The case of a subreg may arise when we have a local (register)
6494 variable or a formal (register) parameter which doesn't quite fill
6495 up an entire register. For now, just assume that it is
6496 legitimate to make the Dwarf info refer to the whole register which
6497 contains the given subreg. */
6498 rtl = XEXP (rtl, 0);
6500 /* ... fall through ... */
6503 /* Whenever a register number forms a part of the description of the
6504 method for calculating the (dynamic) address of a memory resident
6505 object, DWARF rules require the register number be referred to as
6506 a "base register". This distinction is not based in any way upon
6507 what category of register the hardware believes the given register
6508 belongs to. This is strictly DWARF terminology we're dealing with
6509 here. Note that in cases where the location of a memory-resident
6510 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6511 OP_CONST (0)) the actual DWARF location descriptor that we generate
6512 may just be OP_BASEREG (basereg). This may look deceptively like
6513 the object in question was allocated to a register (rather than in
6514 memory) so DWARF consumers need to be aware of the subtle
6515 distinction between OP_REG and OP_BASEREG. */
6516 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6520 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6521 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6526 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6527 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6528 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6532 if (is_based_loc (rtl))
6533 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6534 INTVAL (XEXP (rtl, 1)));
6537 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6538 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6539 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6544 /* If a pseudo-reg is optimized away, it is possible for it to
6545 be replaced with a MEM containing a multiply. */
6546 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6547 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6548 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6552 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6559 return mem_loc_result;
6562 /* Return a descriptor that describes the concatenation of two locations.
6563 This is typically a complex variable. */
6565 static dw_loc_descr_ref
6566 concat_loc_descriptor (x0, x1)
6567 register rtx x0, x1;
6569 dw_loc_descr_ref cc_loc_result = NULL;
6571 if (!is_pseudo_reg (x0)
6572 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6573 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6574 add_loc_descr (&cc_loc_result,
6575 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6577 if (!is_pseudo_reg (x1)
6578 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6579 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6580 add_loc_descr (&cc_loc_result,
6581 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6583 return cc_loc_result;
6586 /* Output a proper Dwarf location descriptor for a variable or parameter
6587 which is either allocated in a register or in a memory location. For a
6588 register, we just generate an OP_REG and the register number. For a
6589 memory location we provide a Dwarf postfix expression describing how to
6590 generate the (dynamic) address of the object onto the address stack. */
6592 static dw_loc_descr_ref
6593 loc_descriptor (rtl)
6596 dw_loc_descr_ref loc_result = NULL;
6597 switch (GET_CODE (rtl))
6600 /* The case of a subreg may arise when we have a local (register)
6601 variable or a formal (register) parameter which doesn't quite fill
6602 up an entire register. For now, just assume that it is
6603 legitimate to make the Dwarf info refer to the whole register which
6604 contains the given subreg. */
6605 rtl = XEXP (rtl, 0);
6607 /* ... fall through ... */
6610 loc_result = reg_loc_descriptor (rtl);
6614 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6618 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6628 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6629 which is not less than the value itself. */
6631 static inline unsigned
6632 ceiling (value, boundary)
6633 register unsigned value;
6634 register unsigned boundary;
6636 return (((value + boundary - 1) / boundary) * boundary);
6639 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6640 pointer to the declared type for the relevant field variable, or return
6641 `integer_type_node' if the given node turns out to be an
6650 if (TREE_CODE (decl) == ERROR_MARK)
6651 return integer_type_node;
6653 type = DECL_BIT_FIELD_TYPE (decl);
6654 if (type == NULL_TREE)
6655 type = TREE_TYPE (decl);
6660 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6661 node, return the alignment in bits for the type, or else return
6662 BITS_PER_WORD if the node actually turns out to be an
6665 static inline unsigned
6666 simple_type_align_in_bits (type)
6669 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6672 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6673 node, return the size in bits for the type if it is a constant, or else
6674 return the alignment for the type if the type's size is not constant, or
6675 else return BITS_PER_WORD if the type actually turns out to be an
6678 static inline unsigned
6679 simple_type_size_in_bits (type)
6682 if (TREE_CODE (type) == ERROR_MARK)
6683 return BITS_PER_WORD;
6686 register tree type_size_tree = TYPE_SIZE (type);
6688 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6689 return TYPE_ALIGN (type);
6691 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6695 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6696 return the byte offset of the lowest addressed byte of the "containing
6697 object" for the given FIELD_DECL, or return 0 if we are unable to
6698 determine what that offset is, either because the argument turns out to
6699 be a pointer to an ERROR_MARK node, or because the offset is actually
6700 variable. (We can't handle the latter case just yet). */
6703 field_byte_offset (decl)
6706 register unsigned type_align_in_bytes;
6707 register unsigned type_align_in_bits;
6708 register unsigned type_size_in_bits;
6709 register unsigned object_offset_in_align_units;
6710 register unsigned object_offset_in_bits;
6711 register unsigned object_offset_in_bytes;
6713 register tree bitpos_tree;
6714 register tree field_size_tree;
6715 register unsigned bitpos_int;
6716 register unsigned deepest_bitpos;
6717 register unsigned field_size_in_bits;
6719 if (TREE_CODE (decl) == ERROR_MARK)
6722 if (TREE_CODE (decl) != FIELD_DECL)
6725 type = field_type (decl);
6727 bitpos_tree = DECL_FIELD_BITPOS (decl);
6728 field_size_tree = DECL_SIZE (decl);
6730 /* We cannot yet cope with fields whose positions or sizes are variable, so
6731 for now, when we see such things, we simply return 0. Someday, we may
6732 be able to handle such cases, but it will be damn difficult. */
6733 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6735 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6737 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6740 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6741 type_size_in_bits = simple_type_size_in_bits (type);
6742 type_align_in_bits = simple_type_align_in_bits (type);
6743 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6745 /* Note that the GCC front-end doesn't make any attempt to keep track of
6746 the starting bit offset (relative to the start of the containing
6747 structure type) of the hypothetical "containing object" for a bit-
6748 field. Thus, when computing the byte offset value for the start of the
6749 "containing object" of a bit-field, we must deduce this information on
6750 our own. This can be rather tricky to do in some cases. For example,
6751 handling the following structure type definition when compiling for an
6752 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6755 struct S { int field1; long long field2:31; };
6757 Fortunately, there is a simple rule-of-thumb which can be
6758 used in such cases. When compiling for an i386/i486, GCC will allocate
6759 8 bytes for the structure shown above. It decides to do this based upon
6760 one simple rule for bit-field allocation. Quite simply, GCC allocates
6761 each "containing object" for each bit-field at the first (i.e. lowest
6762 addressed) legitimate alignment boundary (based upon the required
6763 minimum alignment for the declared type of the field) which it can
6764 possibly use, subject to the condition that there is still enough
6765 available space remaining in the containing object (when allocated at
6766 the selected point) to fully accommodate all of the bits of the
6767 bit-field itself. This simple rule makes it obvious why GCC allocates
6768 8 bytes for each object of the structure type shown above. When looking
6769 for a place to allocate the "containing object" for `field2', the
6770 compiler simply tries to allocate a 64-bit "containing object" at each
6771 successive 32-bit boundary (starting at zero) until it finds a place to
6772 allocate that 64- bit field such that at least 31 contiguous (and
6773 previously unallocated) bits remain within that selected 64 bit field.
6774 (As it turns out, for the example above, the compiler finds that it is
6775 OK to allocate the "containing object" 64-bit field at bit-offset zero
6776 within the structure type.) Here we attempt to work backwards from the
6777 limited set of facts we're given, and we try to deduce from those facts,
6778 where GCC must have believed that the containing object started (within
6779 the structure type). The value we deduce is then used (by the callers of
6780 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6781 for fields (both bit-fields and, in the case of DW_AT_location, regular
6784 /* Figure out the bit-distance from the start of the structure to the
6785 "deepest" bit of the bit-field. */
6786 deepest_bitpos = bitpos_int + field_size_in_bits;
6788 /* This is the tricky part. Use some fancy footwork to deduce where the
6789 lowest addressed bit of the containing object must be. */
6790 object_offset_in_bits
6791 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6793 /* Compute the offset of the containing object in "alignment units". */
6794 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6796 /* Compute the offset of the containing object in bytes. */
6797 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6799 return object_offset_in_bytes;
6802 /* The following routines define various Dwarf attributes and any data
6803 associated with them. */
6805 /* Add a location description attribute value to a DIE.
6807 This emits location attributes suitable for whole variables and
6808 whole parameters. Note that the location attributes for struct fields are
6809 generated by the routine `data_member_location_attribute' below. */
6812 add_AT_location_description (die, attr_kind, rtl)
6814 enum dwarf_attribute attr_kind;
6817 /* Handle a special case. If we are about to output a location descriptor
6818 for a variable or parameter which has been optimized out of existence,
6819 don't do that. A variable which has been optimized out
6820 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6821 Currently, in some rare cases, variables can have DECL_RTL values which
6822 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6823 elsewhere in the compiler. We treat such cases as if the variable(s) in
6824 question had been optimized out of existence. */
6826 if (is_pseudo_reg (rtl)
6827 || (GET_CODE (rtl) == MEM
6828 && is_pseudo_reg (XEXP (rtl, 0)))
6829 || (GET_CODE (rtl) == CONCAT
6830 && is_pseudo_reg (XEXP (rtl, 0))
6831 && is_pseudo_reg (XEXP (rtl, 1))))
6834 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6837 /* Attach the specialized form of location attribute used for data
6838 members of struct and union types. In the special case of a
6839 FIELD_DECL node which represents a bit-field, the "offset" part
6840 of this special location descriptor must indicate the distance
6841 in bytes from the lowest-addressed byte of the containing struct
6842 or union type to the lowest-addressed byte of the "containing
6843 object" for the bit-field. (See the `field_byte_offset' function
6844 above).. For any given bit-field, the "containing object" is a
6845 hypothetical object (of some integral or enum type) within which
6846 the given bit-field lives. The type of this hypothetical
6847 "containing object" is always the same as the declared type of
6848 the individual bit-field itself (for GCC anyway... the DWARF
6849 spec doesn't actually mandate this). Note that it is the size
6850 (in bytes) of the hypothetical "containing object" which will
6851 be given in the DW_AT_byte_size attribute for this bit-field.
6852 (See the `byte_size_attribute' function below.) It is also used
6853 when calculating the value of the DW_AT_bit_offset attribute.
6854 (See the `bit_offset_attribute' function below). */
6857 add_data_member_location_attribute (die, decl)
6858 register dw_die_ref die;
6861 register unsigned long offset;
6862 register dw_loc_descr_ref loc_descr;
6863 register enum dwarf_location_atom op;
6865 if (TREE_CODE (decl) == TREE_VEC)
6866 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6868 offset = field_byte_offset (decl);
6870 /* The DWARF2 standard says that we should assume that the structure address
6871 is already on the stack, so we can specify a structure field address
6872 by using DW_OP_plus_uconst. */
6874 #ifdef MIPS_DEBUGGING_INFO
6875 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6876 correctly. It works only if we leave the offset on the stack. */
6879 op = DW_OP_plus_uconst;
6882 loc_descr = new_loc_descr (op, offset, 0);
6883 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
6886 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6887 does not have a "location" either in memory or in a register. These
6888 things can arise in GNU C when a constant is passed as an actual parameter
6889 to an inlined function. They can also arise in C++ where declared
6890 constants do not necessarily get memory "homes". */
6893 add_const_value_attribute (die, rtl)
6894 register dw_die_ref die;
6897 switch (GET_CODE (rtl))
6900 /* Note that a CONST_INT rtx could represent either an integer or a
6901 floating-point constant. A CONST_INT is used whenever the constant
6902 will fit into a single word. In all such cases, the original mode
6903 of the constant value is wiped out, and the CONST_INT rtx is
6904 assigned VOIDmode. */
6905 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
6909 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6910 floating-point constant. A CONST_DOUBLE is used whenever the
6911 constant requires more than one word in order to be adequately
6912 represented. We output CONST_DOUBLEs as blocks. */
6914 register enum machine_mode mode = GET_MODE (rtl);
6916 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
6918 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
6922 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
6926 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
6930 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
6935 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
6942 add_AT_float (die, DW_AT_const_value, length, array);
6945 add_AT_long_long (die, DW_AT_const_value,
6946 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
6951 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
6957 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
6961 /* In cases where an inlined instance of an inline function is passed
6962 the address of an `auto' variable (which is local to the caller) we
6963 can get a situation where the DECL_RTL of the artificial local
6964 variable (for the inlining) which acts as a stand-in for the
6965 corresponding formal parameter (of the inline function) will look
6966 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6967 exactly a compile-time constant expression, but it isn't the address
6968 of the (artificial) local variable either. Rather, it represents the
6969 *value* which the artificial local variable always has during its
6970 lifetime. We currently have no way to represent such quasi-constant
6971 values in Dwarf, so for now we just punt and generate nothing. */
6975 /* No other kinds of rtx should be possible here. */
6981 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6982 data attribute for a variable or a parameter. We generate the
6983 DW_AT_const_value attribute only in those cases where the given variable
6984 or parameter does not have a true "location" either in memory or in a
6985 register. This can happen (for example) when a constant is passed as an
6986 actual argument in a call to an inline function. (It's possible that
6987 these things can crop up in other ways also.) Note that one type of
6988 constant value which can be passed into an inlined function is a constant
6989 pointer. This can happen for example if an actual argument in an inlined
6990 function call evaluates to a compile-time constant address. */
6993 add_location_or_const_value_attribute (die, decl)
6994 register dw_die_ref die;
6998 register tree declared_type;
6999 register tree passed_type;
7001 if (TREE_CODE (decl) == ERROR_MARK)
7004 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
7007 /* Here we have to decide where we are going to say the parameter "lives"
7008 (as far as the debugger is concerned). We only have a couple of
7009 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
7011 DECL_RTL normally indicates where the parameter lives during most of the
7012 activation of the function. If optimization is enabled however, this
7013 could be either NULL or else a pseudo-reg. Both of those cases indicate
7014 that the parameter doesn't really live anywhere (as far as the code
7015 generation parts of GCC are concerned) during most of the function's
7016 activation. That will happen (for example) if the parameter is never
7017 referenced within the function.
7019 We could just generate a location descriptor here for all non-NULL
7020 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
7021 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
7022 where DECL_RTL is NULL or is a pseudo-reg.
7024 Note however that we can only get away with using DECL_INCOMING_RTL as
7025 a backup substitute for DECL_RTL in certain limited cases. In cases
7026 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7027 we can be sure that the parameter was passed using the same type as it is
7028 declared to have within the function, and that its DECL_INCOMING_RTL
7029 points us to a place where a value of that type is passed.
7031 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7032 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7033 because in these cases DECL_INCOMING_RTL points us to a value of some
7034 type which is *different* from the type of the parameter itself. Thus,
7035 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7036 such cases, the debugger would end up (for example) trying to fetch a
7037 `float' from a place which actually contains the first part of a
7038 `double'. That would lead to really incorrect and confusing
7039 output at debug-time.
7041 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7042 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7043 are a couple of exceptions however. On little-endian machines we can
7044 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7045 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7046 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7047 when (on a little-endian machine) a non-prototyped function has a
7048 parameter declared to be of type `short' or `char'. In such cases,
7049 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7050 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7051 passed `int' value. If the debugger then uses that address to fetch
7052 a `short' or a `char' (on a little-endian machine) the result will be
7053 the correct data, so we allow for such exceptional cases below.
7055 Note that our goal here is to describe the place where the given formal
7056 parameter lives during most of the function's activation (i.e. between
7057 the end of the prologue and the start of the epilogue). We'll do that
7058 as best as we can. Note however that if the given formal parameter is
7059 modified sometime during the execution of the function, then a stack
7060 backtrace (at debug-time) will show the function as having been
7061 called with the *new* value rather than the value which was
7062 originally passed in. This happens rarely enough that it is not
7063 a major problem, but it *is* a problem, and I'd like to fix it.
7065 A future version of dwarf2out.c may generate two additional
7066 attributes for any given DW_TAG_formal_parameter DIE which will
7067 describe the "passed type" and the "passed location" for the
7068 given formal parameter in addition to the attributes we now
7069 generate to indicate the "declared type" and the "active
7070 location" for each parameter. This additional set of attributes
7071 could be used by debuggers for stack backtraces. Separately, note
7072 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7073 NULL also. This happens (for example) for inlined-instances of
7074 inline function formal parameters which are never referenced.
7075 This really shouldn't be happening. All PARM_DECL nodes should
7076 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7077 doesn't currently generate these values for inlined instances of
7078 inline function parameters, so when we see such cases, we are
7079 just out-of-luck for the time being (until integrate.c
7082 /* Use DECL_RTL as the "location" unless we find something better. */
7083 rtl = DECL_RTL (decl);
7085 if (TREE_CODE (decl) == PARM_DECL)
7087 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7089 declared_type = type_main_variant (TREE_TYPE (decl));
7090 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7092 /* This decl represents a formal parameter which was optimized out.
7093 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7094 all* cases where (rtl == NULL_RTX) just below. */
7095 if (declared_type == passed_type)
7096 rtl = DECL_INCOMING_RTL (decl);
7097 else if (! BYTES_BIG_ENDIAN
7098 && TREE_CODE (declared_type) == INTEGER_TYPE
7099 && TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
7100 rtl = DECL_INCOMING_RTL (decl);
7103 /* If the parm was passed in registers, but lives on the stack, then
7104 make a big endian correction if the mode of the type of the
7105 parameter is not the same as the mode of the rtl. */
7106 /* ??? This is the same series of checks that are made in dbxout.c before
7107 we reach the big endian correction code there. It isn't clear if all
7108 of these checks are necessary here, but keeping them all is the safe
7110 else if (GET_CODE (rtl) == MEM
7111 && XEXP (rtl, 0) != const0_rtx
7112 && ! CONSTANT_P (XEXP (rtl, 0))
7113 /* Not passed in memory. */
7114 && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM
7115 /* Not passed by invisible reference. */
7116 && (GET_CODE (XEXP (rtl, 0)) != REG
7117 || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM
7118 || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM
7119 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
7120 || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM
7123 /* Big endian correction check. */
7125 && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl)
7126 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))
7129 int offset = (UNITS_PER_WORD
7130 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))));
7131 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
7132 plus_constant (XEXP (rtl, 0), offset));
7136 if (rtl == NULL_RTX)
7139 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7140 #ifdef LEAF_REG_REMAP
7142 leaf_renumber_regs_insn (rtl);
7145 switch (GET_CODE (rtl))
7148 /* The address of a variable that was optimized away; don't emit
7159 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7160 add_const_value_attribute (die, rtl);
7167 add_AT_location_description (die, DW_AT_location, rtl);
7175 /* Generate an DW_AT_name attribute given some string value to be included as
7176 the value of the attribute. */
7179 add_name_attribute (die, name_string)
7180 register dw_die_ref die;
7181 register char *name_string;
7183 if (name_string != NULL && *name_string != 0)
7184 add_AT_string (die, DW_AT_name, name_string);
7187 /* Given a tree node describing an array bound (either lower or upper) output
7188 a representation for that bound. */
7191 add_bound_info (subrange_die, bound_attr, bound)
7192 register dw_die_ref subrange_die;
7193 register enum dwarf_attribute bound_attr;
7194 register tree bound;
7196 register unsigned bound_value = 0;
7198 /* If this is an Ada unconstrained array type, then don't emit any debug
7199 info because the array bounds are unknown. They are parameterized when
7200 the type is instantiated. */
7201 if (contains_placeholder_p (bound))
7204 switch (TREE_CODE (bound))
7209 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7211 bound_value = TREE_INT_CST_LOW (bound);
7212 if (bound_attr == DW_AT_lower_bound
7213 && ((is_c_family () && bound_value == 0)
7214 || (is_fortran () && bound_value == 1)))
7215 /* use the default */;
7217 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7222 case NON_LVALUE_EXPR:
7223 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7227 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7228 access the upper bound values may be bogus. If they refer to a
7229 register, they may only describe how to get at these values at the
7230 points in the generated code right after they have just been
7231 computed. Worse yet, in the typical case, the upper bound values
7232 will not even *be* computed in the optimized code (though the
7233 number of elements will), so these SAVE_EXPRs are entirely
7234 bogus. In order to compensate for this fact, we check here to see
7235 if optimization is enabled, and if so, we don't add an attribute
7236 for the (unknown and unknowable) upper bound. This should not
7237 cause too much trouble for existing (stupid?) debuggers because
7238 they have to deal with empty upper bounds location descriptions
7239 anyway in order to be able to deal with incomplete array types.
7240 Of course an intelligent debugger (GDB?) should be able to
7241 comprehend that a missing upper bound specification in a array
7242 type used for a storage class `auto' local array variable
7243 indicates that the upper bound is both unknown (at compile- time)
7244 and unknowable (at run-time) due to optimization.
7246 We assume that a MEM rtx is safe because gcc wouldn't put the
7247 value there unless it was going to be used repeatedly in the
7248 function, i.e. for cleanups. */
7249 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7251 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7252 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7253 register rtx loc = SAVE_EXPR_RTL (bound);
7255 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7256 it references an outer function's frame. */
7258 if (GET_CODE (loc) == MEM)
7260 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7262 if (XEXP (loc, 0) != new_addr)
7263 loc = gen_rtx (MEM, GET_MODE (loc), new_addr);
7266 add_AT_flag (decl_die, DW_AT_artificial, 1);
7267 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7268 add_AT_location_description (decl_die, DW_AT_location, loc);
7269 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7272 /* Else leave out the attribute. */
7278 /* ??? These types of bounds can be created by the Ada front end,
7279 and it isn't clear how to emit debug info for them. */
7287 /* Note that the block of subscript information for an array type also
7288 includes information about the element type of type given array type. */
7291 add_subscript_info (type_die, type)
7292 register dw_die_ref type_die;
7295 #ifndef MIPS_DEBUGGING_INFO
7296 register unsigned dimension_number;
7298 register tree lower, upper;
7299 register dw_die_ref subrange_die;
7301 /* The GNU compilers represent multidimensional array types as sequences of
7302 one dimensional array types whose element types are themselves array
7303 types. Here we squish that down, so that each multidimensional array
7304 type gets only one array_type DIE in the Dwarf debugging info. The draft
7305 Dwarf specification say that we are allowed to do this kind of
7306 compression in C (because there is no difference between an array or
7307 arrays and a multidimensional array in C) but for other source languages
7308 (e.g. Ada) we probably shouldn't do this. */
7310 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7311 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7312 We work around this by disabling this feature. See also
7313 gen_array_type_die. */
7314 #ifndef MIPS_DEBUGGING_INFO
7315 for (dimension_number = 0;
7316 TREE_CODE (type) == ARRAY_TYPE;
7317 type = TREE_TYPE (type), dimension_number++)
7320 register tree domain = TYPE_DOMAIN (type);
7322 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7323 and (in GNU C only) variable bounds. Handle all three forms
7325 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7328 /* We have an array type with specified bounds. */
7329 lower = TYPE_MIN_VALUE (domain);
7330 upper = TYPE_MAX_VALUE (domain);
7332 /* define the index type. */
7333 if (TREE_TYPE (domain))
7335 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7336 TREE_TYPE field. We can't emit debug info for this
7337 because it is an unnamed integral type. */
7338 if (TREE_CODE (domain) == INTEGER_TYPE
7339 && TYPE_NAME (domain) == NULL_TREE
7340 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7341 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7344 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7348 /* ??? If upper is NULL, the array has unspecified length,
7349 but it does have a lower bound. This happens with Fortran
7351 Since the debugger is definitely going to need to know N
7352 to produce useful results, go ahead and output the lower
7353 bound solo, and hope the debugger can cope. */
7355 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7357 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7360 /* We have an array type with an unspecified length. The DWARF-2
7361 spec does not say how to handle this; let's just leave out the
7366 #ifndef MIPS_DEBUGGING_INFO
7372 add_byte_size_attribute (die, tree_node)
7374 register tree tree_node;
7376 register unsigned size;
7378 switch (TREE_CODE (tree_node))
7386 case QUAL_UNION_TYPE:
7387 size = int_size_in_bytes (tree_node);
7390 /* For a data member of a struct or union, the DW_AT_byte_size is
7391 generally given as the number of bytes normally allocated for an
7392 object of the *declared* type of the member itself. This is true
7393 even for bit-fields. */
7394 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7400 /* Note that `size' might be -1 when we get to this point. If it is, that
7401 indicates that the byte size of the entity in question is variable. We
7402 have no good way of expressing this fact in Dwarf at the present time,
7403 so just let the -1 pass on through. */
7405 add_AT_unsigned (die, DW_AT_byte_size, size);
7408 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7409 which specifies the distance in bits from the highest order bit of the
7410 "containing object" for the bit-field to the highest order bit of the
7413 For any given bit-field, the "containing object" is a hypothetical
7414 object (of some integral or enum type) within which the given bit-field
7415 lives. The type of this hypothetical "containing object" is always the
7416 same as the declared type of the individual bit-field itself. The
7417 determination of the exact location of the "containing object" for a
7418 bit-field is rather complicated. It's handled by the
7419 `field_byte_offset' function (above).
7421 Note that it is the size (in bytes) of the hypothetical "containing object"
7422 which will be given in the DW_AT_byte_size attribute for this bit-field.
7423 (See `byte_size_attribute' above). */
7426 add_bit_offset_attribute (die, decl)
7427 register dw_die_ref die;
7430 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7431 register tree type = DECL_BIT_FIELD_TYPE (decl);
7432 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7433 register unsigned bitpos_int;
7434 register unsigned highest_order_object_bit_offset;
7435 register unsigned highest_order_field_bit_offset;
7436 register unsigned bit_offset;
7438 /* Must be a field and a bit field. */
7440 || TREE_CODE (decl) != FIELD_DECL)
7443 /* We can't yet handle bit-fields whose offsets are variable, so if we
7444 encounter such things, just return without generating any attribute
7446 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7449 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7451 /* Note that the bit offset is always the distance (in bits) from the
7452 highest-order bit of the "containing object" to the highest-order bit of
7453 the bit-field itself. Since the "high-order end" of any object or field
7454 is different on big-endian and little-endian machines, the computation
7455 below must take account of these differences. */
7456 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7457 highest_order_field_bit_offset = bitpos_int;
7459 if (! BYTES_BIG_ENDIAN)
7461 highest_order_field_bit_offset
7462 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7464 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7468 = (! BYTES_BIG_ENDIAN
7469 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7470 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7472 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7475 /* For a FIELD_DECL node which represents a bit field, output an attribute
7476 which specifies the length in bits of the given field. */
7479 add_bit_size_attribute (die, decl)
7480 register dw_die_ref die;
7483 /* Must be a field and a bit field. */
7484 if (TREE_CODE (decl) != FIELD_DECL
7485 || ! DECL_BIT_FIELD_TYPE (decl))
7487 add_AT_unsigned (die, DW_AT_bit_size,
7488 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7491 /* If the compiled language is ANSI C, then add a 'prototyped'
7492 attribute, if arg types are given for the parameters of a function. */
7495 add_prototyped_attribute (die, func_type)
7496 register dw_die_ref die;
7497 register tree func_type;
7499 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7500 && TYPE_ARG_TYPES (func_type) != NULL)
7501 add_AT_flag (die, DW_AT_prototyped, 1);
7505 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7506 by looking in either the type declaration or object declaration
7510 add_abstract_origin_attribute (die, origin)
7511 register dw_die_ref die;
7512 register tree origin;
7514 dw_die_ref origin_die = NULL;
7515 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7516 origin_die = lookup_decl_die (origin);
7517 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7518 origin_die = lookup_type_die (origin);
7520 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7523 /* We do not currently support the pure_virtual attribute. */
7526 add_pure_or_virtual_attribute (die, func_decl)
7527 register dw_die_ref die;
7528 register tree func_decl;
7530 if (DECL_VINDEX (func_decl))
7532 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7533 add_AT_loc (die, DW_AT_vtable_elem_location,
7534 new_loc_descr (DW_OP_constu,
7535 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7538 /* GNU extension: Record what type this method came from originally. */
7539 if (debug_info_level > DINFO_LEVEL_TERSE)
7540 add_AT_die_ref (die, DW_AT_containing_type,
7541 lookup_type_die (DECL_CONTEXT (func_decl)));
7545 /* Add source coordinate attributes for the given decl. */
7548 add_src_coords_attributes (die, decl)
7549 register dw_die_ref die;
7552 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7554 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7555 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7558 /* Add an DW_AT_name attribute and source coordinate attribute for the
7559 given decl, but only if it actually has a name. */
7562 add_name_and_src_coords_attributes (die, decl)
7563 register dw_die_ref die;
7566 register tree decl_name;
7568 decl_name = DECL_NAME (decl);
7569 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7571 add_name_attribute (die, dwarf2_name (decl, 0));
7572 add_src_coords_attributes (die, decl);
7573 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7574 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7575 add_AT_string (die, DW_AT_MIPS_linkage_name,
7576 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7580 /* Push a new declaration scope. */
7583 push_decl_scope (scope)
7586 tree containing_scope;
7589 /* Make room in the decl_scope_table, if necessary. */
7590 if (decl_scope_table_allocated == decl_scope_depth)
7592 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7594 = (decl_scope_node *) xrealloc (decl_scope_table,
7595 (decl_scope_table_allocated
7596 * sizeof (decl_scope_node)));
7599 decl_scope_table[decl_scope_depth].scope = scope;
7601 /* Sometimes, while recursively emitting subtypes within a class type,
7602 we end up recuring on a subtype at a higher level then the current
7603 subtype. In such a case, we need to search the decl_scope_table to
7604 find the parent of this subtype. */
7606 if (AGGREGATE_TYPE_P (scope))
7607 containing_scope = TYPE_CONTEXT (scope);
7609 containing_scope = NULL_TREE;
7611 /* The normal case. */
7612 if (decl_scope_depth == 0
7613 || containing_scope == NULL_TREE
7614 /* Ignore namespaces for the moment. */
7615 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7616 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7617 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7620 /* We need to search for the containing_scope. */
7621 for (i = 0; i < decl_scope_depth; i++)
7622 if (decl_scope_table[i].scope == containing_scope)
7625 if (i == decl_scope_depth)
7628 decl_scope_table[decl_scope_depth].previous = i;
7634 /* Return the DIE for the scope that immediately contains this declaration. */
7637 scope_die_for (t, context_die)
7639 register dw_die_ref context_die;
7641 register dw_die_ref scope_die = NULL;
7642 register tree containing_scope;
7645 /* Walk back up the declaration tree looking for a place to define
7647 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7648 containing_scope = TYPE_CONTEXT (t);
7649 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7650 containing_scope = decl_class_context (t);
7652 containing_scope = DECL_CONTEXT (t);
7654 /* Ignore namespaces for the moment. */
7655 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7656 containing_scope = NULL_TREE;
7658 /* Ignore function type "scopes" from the C frontend. They mean that
7659 a tagged type is local to a parmlist of a function declarator, but
7660 that isn't useful to DWARF. */
7661 if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE)
7662 containing_scope = NULL_TREE;
7664 /* Function-local tags and functions get stuck in limbo until they are
7665 fixed up by decls_for_scope. */
7666 if (context_die == NULL && containing_scope != NULL_TREE
7667 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7670 if (containing_scope == NULL_TREE)
7671 scope_die = comp_unit_die;
7674 for (i = decl_scope_depth - 1, scope_die = context_die;
7675 i >= 0 && decl_scope_table[i].scope != containing_scope;
7676 (scope_die = scope_die->die_parent,
7677 i = decl_scope_table[i].previous))
7680 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7681 does it try to handle types defined by TYPE_DECLs. Such types
7682 thus have an incorrect TYPE_CONTEXT, which points to the block
7683 they were originally defined in, instead of the current block
7684 created by function inlining. We try to detect that here and
7687 if (i < 0 && scope_die == comp_unit_die
7688 && TREE_CODE (containing_scope) == BLOCK
7689 && is_tagged_type (t)
7690 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7691 == containing_scope))
7693 scope_die = context_die;
7694 /* Since the checks below are no longer applicable. */
7700 if (TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7702 if (debug_info_level > DINFO_LEVEL_TERSE
7703 && !TREE_ASM_WRITTEN (containing_scope))
7706 /* If none of the current dies are suitable, we get file scope. */
7707 scope_die = comp_unit_die;
7714 /* Pop a declaration scope. */
7718 if (decl_scope_depth <= 0)
7723 /* Many forms of DIEs require a "type description" attribute. This
7724 routine locates the proper "type descriptor" die for the type given
7725 by 'type', and adds an DW_AT_type attribute below the given die. */
7728 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7729 register dw_die_ref object_die;
7731 register int decl_const;
7732 register int decl_volatile;
7733 register dw_die_ref context_die;
7735 register enum tree_code code = TREE_CODE (type);
7736 register dw_die_ref type_die = NULL;
7738 /* ??? If this type is an unnamed subrange type of an integral or
7739 floating-point type, use the inner type. This is because we have no
7740 support for unnamed types in base_type_die. This can happen if this is
7741 an Ada subrange type. Correct solution is emit a subrange type die. */
7742 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7743 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7744 type = TREE_TYPE (type), code = TREE_CODE (type);
7746 if (code == ERROR_MARK)
7749 /* Handle a special case. For functions whose return type is void, we
7750 generate *no* type attribute. (Note that no object may have type
7751 `void', so this only applies to function return types). */
7752 if (code == VOID_TYPE)
7755 type_die = modified_type_die (type,
7756 decl_const || TYPE_READONLY (type),
7757 decl_volatile || TYPE_VOLATILE (type),
7759 if (type_die != NULL)
7760 add_AT_die_ref (object_die, DW_AT_type, type_die);
7763 /* Given a tree pointer to a struct, class, union, or enum type node, return
7764 a pointer to the (string) tag name for the given type, or zero if the type
7765 was declared without a tag. */
7771 register char *name = 0;
7773 if (TYPE_NAME (type) != 0)
7775 register tree t = 0;
7777 /* Find the IDENTIFIER_NODE for the type name. */
7778 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7779 t = TYPE_NAME (type);
7781 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7782 a TYPE_DECL node, regardless of whether or not a `typedef' was
7784 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7785 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7786 t = DECL_NAME (TYPE_NAME (type));
7788 /* Now get the name as a string, or invent one. */
7790 name = IDENTIFIER_POINTER (t);
7793 return (name == 0 || *name == '\0') ? 0 : name;
7796 /* Return the type associated with a data member, make a special check
7797 for bit field types. */
7800 member_declared_type (member)
7801 register tree member;
7803 return (DECL_BIT_FIELD_TYPE (member)
7804 ? DECL_BIT_FIELD_TYPE (member)
7805 : TREE_TYPE (member));
7808 /* Get the decl's label, as described by its RTL. This may be different
7809 from the DECL_NAME name used in the source file. */
7813 decl_start_label (decl)
7818 x = DECL_RTL (decl);
7819 if (GET_CODE (x) != MEM)
7823 if (GET_CODE (x) != SYMBOL_REF)
7826 fnname = XSTR (x, 0);
7831 /* These routines generate the internal representation of the DIE's for
7832 the compilation unit. Debugging information is collected by walking
7833 the declaration trees passed in from dwarf2out_decl(). */
7836 gen_array_type_die (type, context_die)
7838 register dw_die_ref context_die;
7840 register dw_die_ref scope_die = scope_die_for (type, context_die);
7841 register dw_die_ref array_die;
7842 register tree element_type;
7844 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7845 the inner array type comes before the outer array type. Thus we must
7846 call gen_type_die before we call new_die. See below also. */
7847 #ifdef MIPS_DEBUGGING_INFO
7848 gen_type_die (TREE_TYPE (type), context_die);
7851 array_die = new_die (DW_TAG_array_type, scope_die);
7854 /* We default the array ordering. SDB will probably do
7855 the right things even if DW_AT_ordering is not present. It's not even
7856 an issue until we start to get into multidimensional arrays anyway. If
7857 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7858 then we'll have to put the DW_AT_ordering attribute back in. (But if
7859 and when we find out that we need to put these in, we will only do so
7860 for multidimensional arrays. */
7861 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
7864 #ifdef MIPS_DEBUGGING_INFO
7865 /* The SGI compilers handle arrays of unknown bound by setting
7866 AT_declaration and not emitting any subrange DIEs. */
7867 if (! TYPE_DOMAIN (type))
7868 add_AT_unsigned (array_die, DW_AT_declaration, 1);
7871 add_subscript_info (array_die, type);
7873 equate_type_number_to_die (type, array_die);
7875 /* Add representation of the type of the elements of this array type. */
7876 element_type = TREE_TYPE (type);
7878 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7879 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7880 We work around this by disabling this feature. See also
7881 add_subscript_info. */
7882 #ifndef MIPS_DEBUGGING_INFO
7883 while (TREE_CODE (element_type) == ARRAY_TYPE)
7884 element_type = TREE_TYPE (element_type);
7886 gen_type_die (element_type, context_die);
7889 add_type_attribute (array_die, element_type, 0, 0, context_die);
7893 gen_set_type_die (type, context_die)
7895 register dw_die_ref context_die;
7897 register dw_die_ref type_die
7898 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
7900 equate_type_number_to_die (type, type_die);
7901 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
7906 gen_entry_point_die (decl, context_die)
7908 register dw_die_ref context_die;
7910 register tree origin = decl_ultimate_origin (decl);
7911 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
7913 add_abstract_origin_attribute (decl_die, origin);
7916 add_name_and_src_coords_attributes (decl_die, decl);
7917 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
7921 if (DECL_ABSTRACT (decl))
7922 equate_decl_number_to_die (decl, decl_die);
7924 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
7928 /* Remember a type in the pending_types_list. */
7934 if (pending_types == pending_types_allocated)
7936 pending_types_allocated += PENDING_TYPES_INCREMENT;
7938 = (tree *) xrealloc (pending_types_list,
7939 sizeof (tree) * pending_types_allocated);
7942 pending_types_list[pending_types++] = type;
7945 /* Output any pending types (from the pending_types list) which we can output
7946 now (taking into account the scope that we are working on now).
7948 For each type output, remove the given type from the pending_types_list
7949 *before* we try to output it. */
7952 output_pending_types_for_scope (context_die)
7953 register dw_die_ref context_die;
7957 while (pending_types)
7960 type = pending_types_list[pending_types];
7961 gen_type_die (type, context_die);
7962 if (!TREE_ASM_WRITTEN (type))
7967 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7970 gen_inlined_enumeration_type_die (type, context_die)
7972 register dw_die_ref context_die;
7974 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
7975 scope_die_for (type, context_die));
7977 if (!TREE_ASM_WRITTEN (type))
7979 add_abstract_origin_attribute (type_die, type);
7982 /* Generate a DIE to represent an inlined instance of a structure type. */
7985 gen_inlined_structure_type_die (type, context_die)
7987 register dw_die_ref context_die;
7989 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
7990 scope_die_for (type, context_die));
7992 if (!TREE_ASM_WRITTEN (type))
7994 add_abstract_origin_attribute (type_die, type);
7997 /* Generate a DIE to represent an inlined instance of a union type. */
8000 gen_inlined_union_type_die (type, context_die)
8002 register dw_die_ref context_die;
8004 register dw_die_ref type_die = new_die (DW_TAG_union_type,
8005 scope_die_for (type, context_die));
8007 if (!TREE_ASM_WRITTEN (type))
8009 add_abstract_origin_attribute (type_die, type);
8012 /* Generate a DIE to represent an enumeration type. Note that these DIEs
8013 include all of the information about the enumeration values also. Each
8014 enumerated type name/value is listed as a child of the enumerated type
8018 gen_enumeration_type_die (type, context_die)
8020 register dw_die_ref context_die;
8022 register dw_die_ref type_die = lookup_type_die (type);
8024 if (type_die == NULL)
8026 type_die = new_die (DW_TAG_enumeration_type,
8027 scope_die_for (type, context_die));
8028 equate_type_number_to_die (type, type_die);
8029 add_name_attribute (type_die, type_tag (type));
8031 else if (! TYPE_SIZE (type))
8034 remove_AT (type_die, DW_AT_declaration);
8036 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
8037 given enum type is incomplete, do not generate the DW_AT_byte_size
8038 attribute or the DW_AT_element_list attribute. */
8039 if (TYPE_SIZE (type))
8043 TREE_ASM_WRITTEN (type) = 1;
8044 add_byte_size_attribute (type_die, type);
8045 if (TYPE_STUB_DECL (type) != NULL_TREE)
8046 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8048 /* If the first reference to this type was as the return type of an
8049 inline function, then it may not have a parent. Fix this now. */
8050 if (type_die->die_parent == NULL)
8051 add_child_die (scope_die_for (type, context_die), type_die);
8053 for (link = TYPE_FIELDS (type);
8054 link != NULL; link = TREE_CHAIN (link))
8056 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
8058 add_name_attribute (enum_die,
8059 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
8060 add_AT_unsigned (enum_die, DW_AT_const_value,
8061 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
8065 add_AT_flag (type_die, DW_AT_declaration, 1);
8069 /* Generate a DIE to represent either a real live formal parameter decl or to
8070 represent just the type of some formal parameter position in some function
8073 Note that this routine is a bit unusual because its argument may be a
8074 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8075 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8076 node. If it's the former then this function is being called to output a
8077 DIE to represent a formal parameter object (or some inlining thereof). If
8078 it's the latter, then this function is only being called to output a
8079 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8080 argument type of some subprogram type. */
8083 gen_formal_parameter_die (node, context_die)
8085 register dw_die_ref context_die;
8087 register dw_die_ref parm_die
8088 = new_die (DW_TAG_formal_parameter, context_die);
8089 register tree origin;
8091 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8094 origin = decl_ultimate_origin (node);
8096 add_abstract_origin_attribute (parm_die, origin);
8099 add_name_and_src_coords_attributes (parm_die, node);
8100 add_type_attribute (parm_die, TREE_TYPE (node),
8101 TREE_READONLY (node),
8102 TREE_THIS_VOLATILE (node),
8104 if (DECL_ARTIFICIAL (node))
8105 add_AT_flag (parm_die, DW_AT_artificial, 1);
8108 equate_decl_number_to_die (node, parm_die);
8109 if (! DECL_ABSTRACT (node))
8110 add_location_or_const_value_attribute (parm_die, node);
8115 /* We were called with some kind of a ..._TYPE node. */
8116 add_type_attribute (parm_die, node, 0, 0, context_die);
8126 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8127 at the end of an (ANSI prototyped) formal parameters list. */
8130 gen_unspecified_parameters_die (decl_or_type, context_die)
8131 register tree decl_or_type;
8132 register dw_die_ref context_die;
8134 new_die (DW_TAG_unspecified_parameters, context_die);
8137 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8138 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8139 parameters as specified in some function type specification (except for
8140 those which appear as part of a function *definition*).
8142 Note we must be careful here to output all of the parameter DIEs before*
8143 we output any DIEs needed to represent the types of the formal parameters.
8144 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8145 non-parameter DIE it sees ends the formal parameter list. */
8148 gen_formal_types_die (function_or_method_type, context_die)
8149 register tree function_or_method_type;
8150 register dw_die_ref context_die;
8153 register tree formal_type = NULL;
8154 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8157 /* In the case where we are generating a formal types list for a C++
8158 non-static member function type, skip over the first thing on the
8159 TYPE_ARG_TYPES list because it only represents the type of the hidden
8160 `this pointer'. The debugger should be able to figure out (without
8161 being explicitly told) that this non-static member function type takes a
8162 `this pointer' and should be able to figure what the type of that hidden
8163 parameter is from the DW_AT_member attribute of the parent
8164 DW_TAG_subroutine_type DIE. */
8165 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8166 first_parm_type = TREE_CHAIN (first_parm_type);
8169 /* Make our first pass over the list of formal parameter types and output a
8170 DW_TAG_formal_parameter DIE for each one. */
8171 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8173 register dw_die_ref parm_die;
8175 formal_type = TREE_VALUE (link);
8176 if (formal_type == void_type_node)
8179 /* Output a (nameless) DIE to represent the formal parameter itself. */
8180 parm_die = gen_formal_parameter_die (formal_type, context_die);
8181 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8182 && link == first_parm_type)
8183 add_AT_flag (parm_die, DW_AT_artificial, 1);
8186 /* If this function type has an ellipsis, add a
8187 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8188 if (formal_type != void_type_node)
8189 gen_unspecified_parameters_die (function_or_method_type, context_die);
8191 /* Make our second (and final) pass over the list of formal parameter types
8192 and output DIEs to represent those types (as necessary). */
8193 for (link = TYPE_ARG_TYPES (function_or_method_type);
8195 link = TREE_CHAIN (link))
8197 formal_type = TREE_VALUE (link);
8198 if (formal_type == void_type_node)
8201 gen_type_die (formal_type, context_die);
8205 /* Generate a DIE to represent a declared function (either file-scope or
8209 gen_subprogram_die (decl, context_die)
8211 register dw_die_ref context_die;
8213 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8214 register tree origin = decl_ultimate_origin (decl);
8215 register dw_die_ref subr_die;
8216 register rtx fp_reg;
8217 register tree fn_arg_types;
8218 register tree outer_scope;
8219 register dw_die_ref old_die = lookup_decl_die (decl);
8220 register int declaration
8221 = (current_function_decl != decl
8223 && (context_die->die_tag == DW_TAG_structure_type
8224 || context_die->die_tag == DW_TAG_union_type)));
8228 subr_die = new_die (DW_TAG_subprogram, context_die);
8229 add_abstract_origin_attribute (subr_die, origin);
8231 else if (old_die && DECL_ABSTRACT (decl)
8232 && get_AT_unsigned (old_die, DW_AT_inline))
8234 /* This must be a redefinition of an extern inline function.
8235 We can just reuse the old die here. */
8238 /* Clear out the inlined attribute and parm types. */
8239 remove_AT (subr_die, DW_AT_inline);
8240 remove_children (subr_die);
8244 register unsigned file_index
8245 = lookup_filename (DECL_SOURCE_FILE (decl));
8247 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8249 /* ??? This can happen if there is a bug in the program, for
8250 instance, if it has duplicate function definitions. Ideally,
8251 we should detect this case and ignore it. For now, if we have
8252 already reported an error, any error at all, then assume that
8253 we got here because of a input error, not a dwarf2 bug. */
8254 extern int errorcount;
8260 /* If the definition comes from the same place as the declaration,
8261 maybe use the old DIE. We always want the DIE for this function
8262 that has the *_pc attributes to be under comp_unit_die so the
8263 debugger can find it. For inlines, that is the concrete instance,
8264 so we can use the old DIE here. For non-inline methods, we want a
8265 specification DIE at toplevel, so we need a new DIE. For local
8266 class methods, this does not apply. */
8267 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8268 || context_die == NULL)
8269 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8270 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8271 == DECL_SOURCE_LINE (decl)))
8275 /* Clear out the declaration attribute and the parm types. */
8276 remove_AT (subr_die, DW_AT_declaration);
8277 remove_children (subr_die);
8281 subr_die = new_die (DW_TAG_subprogram, context_die);
8282 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8283 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8284 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8285 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8286 != DECL_SOURCE_LINE (decl))
8288 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8293 register dw_die_ref scope_die;
8295 if (DECL_CONTEXT (decl))
8296 scope_die = scope_die_for (decl, context_die);
8298 /* Don't put block extern declarations under comp_unit_die. */
8299 scope_die = context_die;
8301 subr_die = new_die (DW_TAG_subprogram, scope_die);
8303 if (TREE_PUBLIC (decl))
8304 add_AT_flag (subr_die, DW_AT_external, 1);
8306 add_name_and_src_coords_attributes (subr_die, decl);
8307 if (debug_info_level > DINFO_LEVEL_TERSE)
8309 register tree type = TREE_TYPE (decl);
8311 add_prototyped_attribute (subr_die, type);
8312 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8315 add_pure_or_virtual_attribute (subr_die, decl);
8316 if (DECL_ARTIFICIAL (decl))
8317 add_AT_flag (subr_die, DW_AT_artificial, 1);
8318 if (TREE_PROTECTED (decl))
8319 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8320 else if (TREE_PRIVATE (decl))
8321 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8326 add_AT_flag (subr_die, DW_AT_declaration, 1);
8328 /* The first time we see a member function, it is in the context of
8329 the class to which it belongs. We make sure of this by emitting
8330 the class first. The next time is the definition, which is
8331 handled above. The two may come from the same source text. */
8332 if (DECL_CONTEXT (decl))
8333 equate_decl_number_to_die (decl, subr_die);
8335 else if (DECL_ABSTRACT (decl))
8337 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8338 but not for extern inline functions. We can't get this completely
8339 correct because information about whether the function was declared
8340 inline is not saved anywhere. */
8341 if (DECL_DEFER_OUTPUT (decl))
8343 if (DECL_INLINE (decl))
8344 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8346 add_AT_unsigned (subr_die, DW_AT_inline,
8347 DW_INL_declared_not_inlined);
8349 else if (DECL_INLINE (decl))
8350 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8354 equate_decl_number_to_die (decl, subr_die);
8356 else if (!DECL_EXTERNAL (decl))
8358 if (origin == NULL_TREE)
8359 equate_decl_number_to_die (decl, subr_die);
8361 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8362 current_funcdef_number);
8363 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8364 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8365 current_funcdef_number);
8366 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8368 add_pubname (decl, subr_die);
8369 add_arange (decl, subr_die);
8371 #ifdef MIPS_DEBUGGING_INFO
8372 /* Add a reference to the FDE for this routine. */
8373 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8376 /* Define the "frame base" location for this routine. We use the
8377 frame pointer or stack pointer registers, since the RTL for local
8378 variables is relative to one of them. */
8380 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8381 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8384 /* ??? This fails for nested inline functions, because context_display
8385 is not part of the state saved/restored for inline functions. */
8386 if (current_function_needs_context)
8387 add_AT_location_description (subr_die, DW_AT_static_link,
8388 lookup_static_chain (decl));
8392 /* Now output descriptions of the arguments for this function. This gets
8393 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8394 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8395 `...' at the end of the formal parameter list. In order to find out if
8396 there was a trailing ellipsis or not, we must instead look at the type
8397 associated with the FUNCTION_DECL. This will be a node of type
8398 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8399 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8400 an ellipsis at the end. */
8401 push_decl_scope (decl);
8403 /* In the case where we are describing a mere function declaration, all we
8404 need to do here (and all we *can* do here) is to describe the *types* of
8405 its formal parameters. */
8406 if (debug_info_level <= DINFO_LEVEL_TERSE)
8408 else if (declaration)
8409 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8412 /* Generate DIEs to represent all known formal parameters */
8413 register tree arg_decls = DECL_ARGUMENTS (decl);
8416 /* When generating DIEs, generate the unspecified_parameters DIE
8417 instead if we come across the arg "__builtin_va_alist" */
8418 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8419 if (TREE_CODE (parm) == PARM_DECL)
8421 if (DECL_NAME (parm)
8422 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8423 "__builtin_va_alist"))
8424 gen_unspecified_parameters_die (parm, subr_die);
8426 gen_decl_die (parm, subr_die);
8429 /* Decide whether we need a unspecified_parameters DIE at the end.
8430 There are 2 more cases to do this for: 1) the ansi ... declaration -
8431 this is detectable when the end of the arg list is not a
8432 void_type_node 2) an unprototyped function declaration (not a
8433 definition). This just means that we have no info about the
8434 parameters at all. */
8435 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8436 if (fn_arg_types != NULL)
8438 /* this is the prototyped case, check for ... */
8439 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8440 gen_unspecified_parameters_die (decl, subr_die);
8442 else if (DECL_INITIAL (decl) == NULL_TREE)
8443 gen_unspecified_parameters_die (decl, subr_die);
8446 /* Output Dwarf info for all of the stuff within the body of the function
8447 (if it has one - it may be just a declaration). */
8448 outer_scope = DECL_INITIAL (decl);
8450 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8451 node created to represent a function. This outermost BLOCK actually
8452 represents the outermost binding contour for the function, i.e. the
8453 contour in which the function's formal parameters and labels get
8454 declared. Curiously, it appears that the front end doesn't actually
8455 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8456 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8457 list for the function instead.) The BLOCK_VARS list for the
8458 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8459 the function however, and we output DWARF info for those in
8460 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8461 node representing the function's outermost pair of curly braces, and
8462 any blocks used for the base and member initializers of a C++
8463 constructor function. */
8464 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8466 current_function_has_inlines = 0;
8467 decls_for_scope (outer_scope, subr_die, 0);
8469 #if 0 && defined (MIPS_DEBUGGING_INFO)
8470 if (current_function_has_inlines)
8472 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8473 if (! comp_unit_has_inlines)
8475 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8476 comp_unit_has_inlines = 1;
8485 /* Generate a DIE to represent a declared data object. */
8488 gen_variable_die (decl, context_die)
8490 register dw_die_ref context_die;
8492 register tree origin = decl_ultimate_origin (decl);
8493 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8495 dw_die_ref old_die = lookup_decl_die (decl);
8497 = (DECL_EXTERNAL (decl)
8498 || current_function_decl != decl_function_context (decl)
8499 || context_die->die_tag == DW_TAG_structure_type
8500 || context_die->die_tag == DW_TAG_union_type);
8503 add_abstract_origin_attribute (var_die, origin);
8504 /* Loop unrolling can create multiple blocks that refer to the same
8505 static variable, so we must test for the DW_AT_declaration flag. */
8506 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8507 copy decls and set the DECL_ABSTRACT flag on them instead of
8509 else if (old_die && TREE_STATIC (decl)
8510 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8512 /* ??? This is an instantiation of a C++ class level static. */
8513 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8514 if (DECL_NAME (decl))
8516 register unsigned file_index
8517 = lookup_filename (DECL_SOURCE_FILE (decl));
8519 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8520 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8522 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8523 != DECL_SOURCE_LINE (decl))
8525 add_AT_unsigned (var_die, DW_AT_decl_line,
8526 DECL_SOURCE_LINE (decl));
8531 add_name_and_src_coords_attributes (var_die, decl);
8532 add_type_attribute (var_die, TREE_TYPE (decl),
8533 TREE_READONLY (decl),
8534 TREE_THIS_VOLATILE (decl), context_die);
8536 if (TREE_PUBLIC (decl))
8537 add_AT_flag (var_die, DW_AT_external, 1);
8539 if (DECL_ARTIFICIAL (decl))
8540 add_AT_flag (var_die, DW_AT_artificial, 1);
8542 if (TREE_PROTECTED (decl))
8543 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8545 else if (TREE_PRIVATE (decl))
8546 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8550 add_AT_flag (var_die, DW_AT_declaration, 1);
8552 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8553 equate_decl_number_to_die (decl, var_die);
8555 if (! declaration && ! DECL_ABSTRACT (decl))
8557 equate_decl_number_to_die (decl, var_die);
8558 add_location_or_const_value_attribute (var_die, decl);
8559 add_pubname (decl, var_die);
8563 /* Generate a DIE to represent a label identifier. */
8566 gen_label_die (decl, context_die)
8568 register dw_die_ref context_die;
8570 register tree origin = decl_ultimate_origin (decl);
8571 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8573 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8574 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8577 add_abstract_origin_attribute (lbl_die, origin);
8579 add_name_and_src_coords_attributes (lbl_die, decl);
8581 if (DECL_ABSTRACT (decl))
8582 equate_decl_number_to_die (decl, lbl_die);
8585 insn = DECL_RTL (decl);
8586 if (GET_CODE (insn) == CODE_LABEL)
8588 /* When optimization is enabled (via -O) some parts of the compiler
8589 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8590 represent source-level labels which were explicitly declared by
8591 the user. This really shouldn't be happening though, so catch
8592 it if it ever does happen. */
8593 if (INSN_DELETED_P (insn))
8596 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8597 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8598 (unsigned) INSN_UID (insn));
8599 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8604 /* Generate a DIE for a lexical block. */
8607 gen_lexical_block_die (stmt, context_die, depth)
8609 register dw_die_ref context_die;
8612 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8613 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8615 if (! BLOCK_ABSTRACT (stmt))
8617 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8619 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8620 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8621 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8624 push_decl_scope (stmt);
8625 decls_for_scope (stmt, stmt_die, depth);
8629 /* Generate a DIE for an inlined subprogram. */
8632 gen_inlined_subroutine_die (stmt, context_die, depth)
8634 register dw_die_ref context_die;
8637 if (! BLOCK_ABSTRACT (stmt))
8639 register dw_die_ref subr_die
8640 = new_die (DW_TAG_inlined_subroutine, context_die);
8641 register tree decl = block_ultimate_origin (stmt);
8642 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8644 add_abstract_origin_attribute (subr_die, decl);
8645 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8647 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8648 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8649 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8650 push_decl_scope (decl);
8651 decls_for_scope (stmt, subr_die, depth);
8653 current_function_has_inlines = 1;
8657 /* Generate a DIE for a field in a record, or structure. */
8660 gen_field_die (decl, context_die)
8662 register dw_die_ref context_die;
8664 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8666 add_name_and_src_coords_attributes (decl_die, decl);
8667 add_type_attribute (decl_die, member_declared_type (decl),
8668 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8671 /* If this is a bit field... */
8672 if (DECL_BIT_FIELD_TYPE (decl))
8674 add_byte_size_attribute (decl_die, decl);
8675 add_bit_size_attribute (decl_die, decl);
8676 add_bit_offset_attribute (decl_die, decl);
8679 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8680 add_data_member_location_attribute (decl_die, decl);
8682 if (DECL_ARTIFICIAL (decl))
8683 add_AT_flag (decl_die, DW_AT_artificial, 1);
8685 if (TREE_PROTECTED (decl))
8686 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8688 else if (TREE_PRIVATE (decl))
8689 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8693 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8694 Use modified_type_die instead.
8695 We keep this code here just in case these types of DIEs may be needed to
8696 represent certain things in other languages (e.g. Pascal) someday. */
8698 gen_pointer_type_die (type, context_die)
8700 register dw_die_ref context_die;
8702 register dw_die_ref ptr_die
8703 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8705 equate_type_number_to_die (type, ptr_die);
8706 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8707 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8710 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8711 Use modified_type_die instead.
8712 We keep this code here just in case these types of DIEs may be needed to
8713 represent certain things in other languages (e.g. Pascal) someday. */
8715 gen_reference_type_die (type, context_die)
8717 register dw_die_ref context_die;
8719 register dw_die_ref ref_die
8720 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8722 equate_type_number_to_die (type, ref_die);
8723 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8724 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8728 /* Generate a DIE for a pointer to a member type. */
8730 gen_ptr_to_mbr_type_die (type, context_die)
8732 register dw_die_ref context_die;
8734 register dw_die_ref ptr_die
8735 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8737 equate_type_number_to_die (type, ptr_die);
8738 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8739 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8740 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8743 /* Generate the DIE for the compilation unit. */
8746 gen_compile_unit_die (main_input_filename)
8747 register char *main_input_filename;
8750 char *wd = getpwd ();
8752 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8753 add_name_attribute (comp_unit_die, main_input_filename);
8756 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8758 sprintf (producer, "%s %s", language_string, version_string);
8760 #ifdef MIPS_DEBUGGING_INFO
8761 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8762 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8763 not appear in the producer string, the debugger reaches the conclusion
8764 that the object file is stripped and has no debugging information.
8765 To get the MIPS/SGI debugger to believe that there is debugging
8766 information in the object file, we add a -g to the producer string. */
8767 if (debug_info_level > DINFO_LEVEL_TERSE)
8768 strcat (producer, " -g");
8771 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8773 if (strcmp (language_string, "GNU C++") == 0)
8774 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8776 else if (strcmp (language_string, "GNU Ada") == 0)
8777 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8779 else if (strcmp (language_string, "GNU F77") == 0)
8780 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8782 else if (strcmp (language_string, "GNU Pascal") == 0)
8783 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8785 else if (flag_traditional)
8786 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8789 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8791 #if 0 /* unimplemented */
8792 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8793 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8797 /* Generate a DIE for a string type. */
8800 gen_string_type_die (type, context_die)
8802 register dw_die_ref context_die;
8804 register dw_die_ref type_die
8805 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8807 equate_type_number_to_die (type, type_die);
8809 /* Fudge the string length attribute for now. */
8811 /* TODO: add string length info.
8812 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8813 bound_representation (upper_bound, 0, 'u'); */
8816 /* Generate the DIE for a base class. */
8819 gen_inheritance_die (binfo, context_die)
8820 register tree binfo;
8821 register dw_die_ref context_die;
8823 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8825 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8826 add_data_member_location_attribute (die, binfo);
8828 if (TREE_VIA_VIRTUAL (binfo))
8829 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
8830 if (TREE_VIA_PUBLIC (binfo))
8831 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
8832 else if (TREE_VIA_PROTECTED (binfo))
8833 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
8836 /* Generate a DIE for a class member. */
8839 gen_member_die (type, context_die)
8841 register dw_die_ref context_die;
8843 register tree member;
8845 /* If this is not an incomplete type, output descriptions of each of its
8846 members. Note that as we output the DIEs necessary to represent the
8847 members of this record or union type, we will also be trying to output
8848 DIEs to represent the *types* of those members. However the `type'
8849 function (above) will specifically avoid generating type DIEs for member
8850 types *within* the list of member DIEs for this (containing) type execpt
8851 for those types (of members) which are explicitly marked as also being
8852 members of this (containing) type themselves. The g++ front- end can
8853 force any given type to be treated as a member of some other
8854 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8855 to point to the TREE node representing the appropriate (containing)
8858 /* First output info about the base classes. */
8859 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
8861 register tree bases = TYPE_BINFO_BASETYPES (type);
8862 register int n_bases = TREE_VEC_LENGTH (bases);
8865 for (i = 0; i < n_bases; i++)
8866 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
8869 /* Now output info about the data members and type members. */
8870 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
8871 gen_decl_die (member, context_die);
8873 /* Now output info about the function members (if any). */
8874 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
8875 gen_decl_die (member, context_die);
8878 /* Generate a DIE for a structure or union type. */
8881 gen_struct_or_union_type_die (type, context_die)
8883 register dw_die_ref context_die;
8885 register dw_die_ref type_die = lookup_type_die (type);
8886 register dw_die_ref scope_die = 0;
8887 register int nested = 0;
8889 if (type_die && ! TYPE_SIZE (type))
8892 if (TYPE_CONTEXT (type) != NULL_TREE
8893 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)))
8896 scope_die = scope_die_for (type, context_die);
8898 if (! type_die || (nested && scope_die == comp_unit_die))
8899 /* First occurrence of type or toplevel definition of nested class. */
8901 register dw_die_ref old_die = type_die;
8903 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
8904 ? DW_TAG_structure_type : DW_TAG_union_type,
8906 equate_type_number_to_die (type, type_die);
8907 add_name_attribute (type_die, type_tag (type));
8909 add_AT_die_ref (type_die, DW_AT_specification, old_die);
8912 remove_AT (type_die, DW_AT_declaration);
8914 /* If we're not in the right context to be defining this type, defer to
8915 avoid tricky recursion. */
8916 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
8918 add_AT_flag (type_die, DW_AT_declaration, 1);
8921 /* If this type has been completed, then give it a byte_size attribute and
8922 then give a list of members. */
8923 else if (TYPE_SIZE (type))
8925 /* Prevent infinite recursion in cases where the type of some member of
8926 this type is expressed in terms of this type itself. */
8927 TREE_ASM_WRITTEN (type) = 1;
8928 add_byte_size_attribute (type_die, type);
8929 if (TYPE_STUB_DECL (type) != NULL_TREE)
8930 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8932 /* If the first reference to this type was as the return type of an
8933 inline function, then it may not have a parent. Fix this now. */
8934 if (type_die->die_parent == NULL)
8935 add_child_die (scope_die, type_die);
8937 push_decl_scope (type);
8938 gen_member_die (type, type_die);
8941 /* GNU extension: Record what type our vtable lives in. */
8942 if (TYPE_VFIELD (type))
8944 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
8946 gen_type_die (vtype, context_die);
8947 add_AT_die_ref (type_die, DW_AT_containing_type,
8948 lookup_type_die (vtype));
8952 add_AT_flag (type_die, DW_AT_declaration, 1);
8955 /* Generate a DIE for a subroutine _type_. */
8958 gen_subroutine_type_die (type, context_die)
8960 register dw_die_ref context_die;
8962 register tree return_type = TREE_TYPE (type);
8963 register dw_die_ref subr_die
8964 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
8966 equate_type_number_to_die (type, subr_die);
8967 add_prototyped_attribute (subr_die, type);
8968 add_type_attribute (subr_die, return_type, 0, 0, context_die);
8969 gen_formal_types_die (type, subr_die);
8972 /* Generate a DIE for a type definition */
8975 gen_typedef_die (decl, context_die)
8977 register dw_die_ref context_die;
8979 register dw_die_ref type_die;
8980 register tree origin;
8982 if (TREE_ASM_WRITTEN (decl))
8984 TREE_ASM_WRITTEN (decl) = 1;
8986 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
8987 origin = decl_ultimate_origin (decl);
8989 add_abstract_origin_attribute (type_die, origin);
8993 add_name_and_src_coords_attributes (type_die, decl);
8994 if (DECL_ORIGINAL_TYPE (decl))
8996 type = DECL_ORIGINAL_TYPE (decl);
8997 equate_type_number_to_die (TREE_TYPE (decl), type_die);
9000 type = TREE_TYPE (decl);
9001 add_type_attribute (type_die, type, TREE_READONLY (decl),
9002 TREE_THIS_VOLATILE (decl), context_die);
9005 if (DECL_ABSTRACT (decl))
9006 equate_decl_number_to_die (decl, type_die);
9009 /* Generate a type description DIE. */
9012 gen_type_die (type, context_die)
9014 register dw_die_ref context_die;
9016 if (type == NULL_TREE || type == error_mark_node)
9019 /* We are going to output a DIE to represent the unqualified version of
9020 this type (i.e. without any const or volatile qualifiers) so get the
9021 main variant (i.e. the unqualified version) of this type now. */
9022 type = type_main_variant (type);
9024 if (TREE_ASM_WRITTEN (type))
9027 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9028 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
9030 TREE_ASM_WRITTEN (type) = 1;
9031 gen_decl_die (TYPE_NAME (type), context_die);
9035 switch (TREE_CODE (type))
9041 case REFERENCE_TYPE:
9042 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
9043 ensures that the gen_type_die recursion will terminate even if the
9044 type is recursive. Recursive types are possible in Ada. */
9045 /* ??? We could perhaps do this for all types before the switch
9047 TREE_ASM_WRITTEN (type) = 1;
9049 /* For these types, all that is required is that we output a DIE (or a
9050 set of DIEs) to represent the "basis" type. */
9051 gen_type_die (TREE_TYPE (type), context_die);
9055 /* This code is used for C++ pointer-to-data-member types.
9056 Output a description of the relevant class type. */
9057 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
9059 /* Output a description of the type of the object pointed to. */
9060 gen_type_die (TREE_TYPE (type), context_die);
9062 /* Now output a DIE to represent this pointer-to-data-member type
9064 gen_ptr_to_mbr_type_die (type, context_die);
9068 gen_type_die (TYPE_DOMAIN (type), context_die);
9069 gen_set_type_die (type, context_die);
9073 gen_type_die (TREE_TYPE (type), context_die);
9074 abort (); /* No way to represent these in Dwarf yet! */
9078 /* Force out return type (in case it wasn't forced out already). */
9079 gen_type_die (TREE_TYPE (type), context_die);
9080 gen_subroutine_type_die (type, context_die);
9084 /* Force out return type (in case it wasn't forced out already). */
9085 gen_type_die (TREE_TYPE (type), context_die);
9086 gen_subroutine_type_die (type, context_die);
9090 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9092 gen_type_die (TREE_TYPE (type), context_die);
9093 gen_string_type_die (type, context_die);
9096 gen_array_type_die (type, context_die);
9102 case QUAL_UNION_TYPE:
9103 /* If this is a nested type whose containing class hasn't been
9104 written out yet, writing it out will cover this one, too. */
9105 if (TYPE_CONTEXT (type)
9106 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9107 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9109 gen_type_die (TYPE_CONTEXT (type), context_die);
9111 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9114 /* If that failed, attach ourselves to the stub. */
9115 push_decl_scope (TYPE_CONTEXT (type));
9116 context_die = lookup_type_die (TYPE_CONTEXT (type));
9119 if (TREE_CODE (type) == ENUMERAL_TYPE)
9120 gen_enumeration_type_die (type, context_die);
9122 gen_struct_or_union_type_die (type, context_die);
9124 if (TYPE_CONTEXT (type)
9125 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9126 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9129 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9130 it up if it is ever completed. gen_*_type_die will set it for us
9131 when appropriate. */
9140 /* No DIEs needed for fundamental types. */
9144 /* No Dwarf representation currently defined. */
9151 TREE_ASM_WRITTEN (type) = 1;
9154 /* Generate a DIE for a tagged type instantiation. */
9157 gen_tagged_type_instantiation_die (type, context_die)
9159 register dw_die_ref context_die;
9161 if (type == NULL_TREE || type == error_mark_node)
9164 /* We are going to output a DIE to represent the unqualified version of
9165 this type (i.e. without any const or volatile qualifiers) so make sure
9166 that we have the main variant (i.e. the unqualified version) of this
9168 if (type != type_main_variant (type)
9169 || !TREE_ASM_WRITTEN (type))
9172 switch (TREE_CODE (type))
9178 gen_inlined_enumeration_type_die (type, context_die);
9182 gen_inlined_structure_type_die (type, context_die);
9186 case QUAL_UNION_TYPE:
9187 gen_inlined_union_type_die (type, context_die);
9195 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9196 things which are local to the given block. */
9199 gen_block_die (stmt, context_die, depth)
9201 register dw_die_ref context_die;
9204 register int must_output_die = 0;
9205 register tree origin;
9207 register enum tree_code origin_code;
9209 /* Ignore blocks never really used to make RTL. */
9211 if (stmt == NULL_TREE || !TREE_USED (stmt))
9214 /* Determine the "ultimate origin" of this block. This block may be an
9215 inlined instance of an inlined instance of inline function, so we have
9216 to trace all of the way back through the origin chain to find out what
9217 sort of node actually served as the original seed for the creation of
9218 the current block. */
9219 origin = block_ultimate_origin (stmt);
9220 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9222 /* Determine if we need to output any Dwarf DIEs at all to represent this
9224 if (origin_code == FUNCTION_DECL)
9225 /* The outer scopes for inlinings *must* always be represented. We
9226 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9227 must_output_die = 1;
9230 /* In the case where the current block represents an inlining of the
9231 "body block" of an inline function, we must *NOT* output any DIE for
9232 this block because we have already output a DIE to represent the
9233 whole inlined function scope and the "body block" of any function
9234 doesn't really represent a different scope according to ANSI C
9235 rules. So we check here to make sure that this block does not
9236 represent a "body block inlining" before trying to set the
9237 `must_output_die' flag. */
9238 if (! is_body_block (origin ? origin : stmt))
9240 /* Determine if this block directly contains any "significant"
9241 local declarations which we will need to output DIEs for. */
9242 if (debug_info_level > DINFO_LEVEL_TERSE)
9243 /* We are not in terse mode so *any* local declaration counts
9244 as being a "significant" one. */
9245 must_output_die = (BLOCK_VARS (stmt) != NULL);
9247 /* We are in terse mode, so only local (nested) function
9248 definitions count as "significant" local declarations. */
9249 for (decl = BLOCK_VARS (stmt);
9250 decl != NULL; decl = TREE_CHAIN (decl))
9251 if (TREE_CODE (decl) == FUNCTION_DECL
9252 && DECL_INITIAL (decl))
9254 must_output_die = 1;
9260 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9261 DIE for any block which contains no significant local declarations at
9262 all. Rather, in such cases we just call `decls_for_scope' so that any
9263 needed Dwarf info for any sub-blocks will get properly generated. Note
9264 that in terse mode, our definition of what constitutes a "significant"
9265 local declaration gets restricted to include only inlined function
9266 instances and local (nested) function definitions. */
9267 if (must_output_die)
9269 if (origin_code == FUNCTION_DECL)
9270 gen_inlined_subroutine_die (stmt, context_die, depth);
9272 gen_lexical_block_die (stmt, context_die, depth);
9275 decls_for_scope (stmt, context_die, depth);
9278 /* Generate all of the decls declared within a given scope and (recursively)
9279 all of its sub-blocks. */
9282 decls_for_scope (stmt, context_die, depth)
9284 register dw_die_ref context_die;
9288 register tree subblocks;
9290 /* Ignore blocks never really used to make RTL. */
9291 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9294 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9295 next_block_number++;
9297 /* Output the DIEs to represent all of the data objects and typedefs
9298 declared directly within this block but not within any nested
9299 sub-blocks. Also, nested function and tag DIEs have been
9300 generated with a parent of NULL; fix that up now. */
9301 for (decl = BLOCK_VARS (stmt);
9302 decl != NULL; decl = TREE_CHAIN (decl))
9304 register dw_die_ref die;
9306 if (TREE_CODE (decl) == FUNCTION_DECL)
9307 die = lookup_decl_die (decl);
9308 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9309 die = lookup_type_die (TREE_TYPE (decl));
9313 if (die != NULL && die->die_parent == NULL)
9314 add_child_die (context_die, die);
9316 gen_decl_die (decl, context_die);
9319 /* Output the DIEs to represent all sub-blocks (and the items declared
9320 therein) of this block. */
9321 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9323 subblocks = BLOCK_CHAIN (subblocks))
9324 gen_block_die (subblocks, context_die, depth + 1);
9327 /* Is this a typedef we can avoid emitting? */
9330 is_redundant_typedef (decl)
9333 if (TYPE_DECL_IS_STUB (decl))
9336 if (DECL_ARTIFICIAL (decl)
9337 && DECL_CONTEXT (decl)
9338 && is_tagged_type (DECL_CONTEXT (decl))
9339 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9340 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9341 /* Also ignore the artificial member typedef for the class name. */
9347 /* Generate Dwarf debug information for a decl described by DECL. */
9350 gen_decl_die (decl, context_die)
9352 register dw_die_ref context_die;
9354 register tree origin;
9356 /* Make a note of the decl node we are going to be working on. We may need
9357 to give the user the source coordinates of where it appeared in case we
9358 notice (later on) that something about it looks screwy. */
9359 dwarf_last_decl = decl;
9361 if (TREE_CODE (decl) == ERROR_MARK)
9364 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9365 ignore a function definition, since that would screw up our count of
9366 blocks, and that in turn will completely screw up the labels we will
9367 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9368 subsequent blocks). */
9369 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9372 switch (TREE_CODE (decl))
9375 /* The individual enumerators of an enum type get output when we output
9376 the Dwarf representation of the relevant enum type itself. */
9380 /* Don't output any DIEs to represent mere function declarations,
9381 unless they are class members or explicit block externs. */
9382 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9383 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9386 if (debug_info_level > DINFO_LEVEL_TERSE)
9388 /* Before we describe the FUNCTION_DECL itself, make sure that we
9389 have described its return type. */
9390 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9392 /* And its containing type. */
9393 origin = decl_class_context (decl);
9394 if (origin != NULL_TREE)
9395 gen_type_die (origin, context_die);
9397 /* And its virtual context. */
9398 if (DECL_VINDEX (decl) != NULL_TREE)
9399 gen_type_die (DECL_CONTEXT (decl), context_die);
9402 /* Now output a DIE to represent the function itself. */
9403 gen_subprogram_die (decl, context_die);
9407 /* If we are in terse mode, don't generate any DIEs to represent any
9409 if (debug_info_level <= DINFO_LEVEL_TERSE)
9412 /* In the special case of a TYPE_DECL node representing the
9413 declaration of some type tag, if the given TYPE_DECL is marked as
9414 having been instantiated from some other (original) TYPE_DECL node
9415 (e.g. one which was generated within the original definition of an
9416 inline function) we have to generate a special (abbreviated)
9417 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9419 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9421 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9425 if (is_redundant_typedef (decl))
9426 gen_type_die (TREE_TYPE (decl), context_die);
9428 /* Output a DIE to represent the typedef itself. */
9429 gen_typedef_die (decl, context_die);
9433 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9434 gen_label_die (decl, context_die);
9438 /* If we are in terse mode, don't generate any DIEs to represent any
9439 variable declarations or definitions. */
9440 if (debug_info_level <= DINFO_LEVEL_TERSE)
9443 /* Output any DIEs that are needed to specify the type of this data
9445 gen_type_die (TREE_TYPE (decl), context_die);
9447 /* And its containing type. */
9448 origin = decl_class_context (decl);
9449 if (origin != NULL_TREE)
9450 gen_type_die (origin, context_die);
9452 /* Now output the DIE to represent the data object itself. This gets
9453 complicated because of the possibility that the VAR_DECL really
9454 represents an inlined instance of a formal parameter for an inline
9456 origin = decl_ultimate_origin (decl);
9457 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9458 gen_formal_parameter_die (decl, context_die);
9460 gen_variable_die (decl, context_die);
9464 /* Ignore the nameless fields that are used to skip bits, but
9465 handle C++ anonymous unions. */
9466 if (DECL_NAME (decl) != NULL_TREE
9467 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9469 gen_type_die (member_declared_type (decl), context_die);
9470 gen_field_die (decl, context_die);
9475 gen_type_die (TREE_TYPE (decl), context_die);
9476 gen_formal_parameter_die (decl, context_die);
9484 /* Write the debugging output for DECL. */
9487 dwarf2out_decl (decl)
9490 register dw_die_ref context_die = comp_unit_die;
9492 if (TREE_CODE (decl) == ERROR_MARK)
9495 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9496 hope that the node in question doesn't represent a function definition.
9497 If it does, then totally ignoring it is bound to screw up our count of
9498 blocks, and that in turn will completely screw up the labels we will
9499 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9500 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9501 own sequence numbers with them!) */
9502 if (DECL_IGNORED_P (decl))
9504 if (TREE_CODE (decl) == FUNCTION_DECL
9505 && DECL_INITIAL (decl) != NULL)
9511 switch (TREE_CODE (decl))
9514 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9515 builtin function. Explicit programmer-supplied declarations of
9516 these same functions should NOT be ignored however. */
9517 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9520 /* What we would really like to do here is to filter out all mere
9521 file-scope declarations of file-scope functions which are never
9522 referenced later within this translation unit (and keep all of ones
9523 that *are* referenced later on) but we aren't clairvoyant, so we have
9524 no idea which functions will be referenced in the future (i.e. later
9525 on within the current translation unit). So here we just ignore all
9526 file-scope function declarations which are not also definitions. If
9527 and when the debugger needs to know something about these functions,
9528 it wil have to hunt around and find the DWARF information associated
9529 with the definition of the function. Note that we can't just check
9530 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9531 definitions and which ones represent mere declarations. We have to
9532 check `DECL_INITIAL' instead. That's because the C front-end
9533 supports some weird semantics for "extern inline" function
9534 definitions. These can get inlined within the current translation
9535 unit (an thus, we need to generate DWARF info for their abstract
9536 instances so that the DWARF info for the concrete inlined instances
9537 can have something to refer to) but the compiler never generates any
9538 out-of-lines instances of such things (despite the fact that they
9539 *are* definitions). The important point is that the C front-end
9540 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9541 to generate DWARF for them anyway. Note that the C++ front-end also
9542 plays some similar games for inline function definitions appearing
9543 within include files which also contain
9544 `#pragma interface' pragmas. */
9545 if (DECL_INITIAL (decl) == NULL_TREE)
9548 /* If we're a nested function, initially use a parent of NULL; if we're
9549 a plain function, this will be fixed up in decls_for_scope. If
9550 we're a method, it will be ignored, since we already have a DIE. */
9551 if (decl_function_context (decl))
9557 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9558 declaration and if the declaration was never even referenced from
9559 within this entire compilation unit. We suppress these DIEs in
9560 order to save space in the .debug section (by eliminating entries
9561 which are probably useless). Note that we must not suppress
9562 block-local extern declarations (whether used or not) because that
9563 would screw-up the debugger's name lookup mechanism and cause it to
9564 miss things which really ought to be in scope at a given point. */
9565 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9568 /* If we are in terse mode, don't generate any DIEs to represent any
9569 variable declarations or definitions. */
9570 if (debug_info_level <= DINFO_LEVEL_TERSE)
9575 /* Don't bother trying to generate any DIEs to represent any of the
9576 normal built-in types for the language we are compiling. */
9577 if (DECL_SOURCE_LINE (decl) == 0)
9579 /* OK, we need to generate one for `bool' so GDB knows what type
9580 comparisons have. */
9581 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9582 == DW_LANG_C_plus_plus)
9583 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9584 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9589 /* If we are in terse mode, don't generate any DIEs for types. */
9590 if (debug_info_level <= DINFO_LEVEL_TERSE)
9593 /* If we're a function-scope tag, initially use a parent of NULL;
9594 this will be fixed up in decls_for_scope. */
9595 if (decl_function_context (decl))
9604 gen_decl_die (decl, context_die);
9605 output_pending_types_for_scope (comp_unit_die);
9608 /* Output a marker (i.e. a label) for the beginning of the generated code for
9612 dwarf2out_begin_block (blocknum)
9613 register unsigned blocknum;
9615 function_section (current_function_decl);
9616 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9619 /* Output a marker (i.e. a label) for the end of the generated code for a
9623 dwarf2out_end_block (blocknum)
9624 register unsigned blocknum;
9626 function_section (current_function_decl);
9627 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9630 /* Output a marker (i.e. a label) at a point in the assembly code which
9631 corresponds to a given source level label. */
9634 dwarf2out_label (insn)
9637 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9639 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9641 function_section (current_function_decl);
9642 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9643 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9644 (unsigned) INSN_UID (insn));
9648 /* Lookup a filename (in the list of filenames that we know about here in
9649 dwarf2out.c) and return its "index". The index of each (known) filename is
9650 just a unique number which is associated with only that one filename.
9651 We need such numbers for the sake of generating labels
9652 (in the .debug_sfnames section) and references to those
9653 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9654 If the filename given as an argument is not found in our current list,
9655 add it to the list and assign it the next available unique index number.
9656 In order to speed up searches, we remember the index of the filename
9657 was looked up last. This handles the majority of all searches. */
9660 lookup_filename (file_name)
9663 static unsigned last_file_lookup_index = 0;
9664 register unsigned i;
9666 /* Check to see if the file name that was searched on the previous call
9667 matches this file name. If so, return the index. */
9668 if (last_file_lookup_index != 0)
9669 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9670 return last_file_lookup_index;
9672 /* Didn't match the previous lookup, search the table */
9673 for (i = 1; i < file_table_in_use; ++i)
9674 if (strcmp (file_name, file_table[i]) == 0)
9676 last_file_lookup_index = i;
9680 /* Prepare to add a new table entry by making sure there is enough space in
9681 the table to do so. If not, expand the current table. */
9682 if (file_table_in_use == file_table_allocated)
9684 file_table_allocated += FILE_TABLE_INCREMENT;
9686 = (char **) xrealloc (file_table,
9687 file_table_allocated * sizeof (char *));
9690 /* Add the new entry to the end of the filename table. */
9691 file_table[file_table_in_use] = xstrdup (file_name);
9692 last_file_lookup_index = file_table_in_use++;
9694 return last_file_lookup_index;
9697 /* Output a label to mark the beginning of a source code line entry
9698 and record information relating to this source line, in
9699 'line_info_table' for later output of the .debug_line section. */
9702 dwarf2out_line (filename, line)
9703 register char *filename;
9704 register unsigned line;
9706 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9708 function_section (current_function_decl);
9710 if (DECL_SECTION_NAME (current_function_decl))
9712 register dw_separate_line_info_ref line_info;
9713 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9714 separate_line_info_table_in_use);
9715 fputc ('\n', asm_out_file);
9717 /* expand the line info table if necessary */
9718 if (separate_line_info_table_in_use
9719 == separate_line_info_table_allocated)
9721 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9722 separate_line_info_table
9723 = (dw_separate_line_info_ref)
9724 xrealloc (separate_line_info_table,
9725 separate_line_info_table_allocated
9726 * sizeof (dw_separate_line_info_entry));
9729 /* Add the new entry at the end of the line_info_table. */
9731 = &separate_line_info_table[separate_line_info_table_in_use++];
9732 line_info->dw_file_num = lookup_filename (filename);
9733 line_info->dw_line_num = line;
9734 line_info->function = current_funcdef_number;
9738 register dw_line_info_ref line_info;
9740 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9741 line_info_table_in_use);
9742 fputc ('\n', asm_out_file);
9744 /* Expand the line info table if necessary. */
9745 if (line_info_table_in_use == line_info_table_allocated)
9747 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9749 = (dw_line_info_ref)
9750 xrealloc (line_info_table,
9751 (line_info_table_allocated
9752 * sizeof (dw_line_info_entry)));
9755 /* Add the new entry at the end of the line_info_table. */
9756 line_info = &line_info_table[line_info_table_in_use++];
9757 line_info->dw_file_num = lookup_filename (filename);
9758 line_info->dw_line_num = line;
9763 /* Record the beginning of a new source file, for later output
9764 of the .debug_macinfo section. At present, unimplemented. */
9767 dwarf2out_start_source_file (filename)
9768 register char *filename ATTRIBUTE_UNUSED;
9772 /* Record the end of a source file, for later output
9773 of the .debug_macinfo section. At present, unimplemented. */
9776 dwarf2out_end_source_file ()
9780 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9781 the tail part of the directive line, i.e. the part which is past the
9782 initial whitespace, #, whitespace, directive-name, whitespace part. */
9785 dwarf2out_define (lineno, buffer)
9786 register unsigned lineno;
9787 register char *buffer;
9789 static int initialized = 0;
9792 dwarf2out_start_source_file (primary_filename);
9797 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9798 the tail part of the directive line, i.e. the part which is past the
9799 initial whitespace, #, whitespace, directive-name, whitespace part. */
9802 dwarf2out_undef (lineno, buffer)
9803 register unsigned lineno ATTRIBUTE_UNUSED;
9804 register char *buffer ATTRIBUTE_UNUSED;
9808 /* Set up for Dwarf output at the start of compilation. */
9811 dwarf2out_init (asm_out_file, main_input_filename)
9812 register FILE *asm_out_file;
9813 register char *main_input_filename;
9815 /* Remember the name of the primary input file. */
9816 primary_filename = main_input_filename;
9818 /* Allocate the initial hunk of the file_table. */
9819 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
9820 bzero ((char *) file_table, FILE_TABLE_INCREMENT * sizeof (char *));
9821 file_table_allocated = FILE_TABLE_INCREMENT;
9823 /* Skip the first entry - file numbers begin at 1. */
9824 file_table_in_use = 1;
9826 /* Allocate the initial hunk of the decl_die_table. */
9828 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9829 bzero ((char *) decl_die_table,
9830 DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9831 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
9832 decl_die_table_in_use = 0;
9834 /* Allocate the initial hunk of the decl_scope_table. */
9836 = (decl_scope_node *) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9837 * sizeof (decl_scope_node));
9838 bzero ((char *) decl_scope_table,
9839 DECL_SCOPE_TABLE_INCREMENT * sizeof (decl_scope_node));
9840 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
9841 decl_scope_depth = 0;
9843 /* Allocate the initial hunk of the abbrev_die_table. */
9845 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9846 * sizeof (dw_die_ref));
9847 bzero ((char *) abbrev_die_table,
9848 ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9849 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
9850 /* Zero-th entry is allocated, but unused */
9851 abbrev_die_table_in_use = 1;
9853 /* Allocate the initial hunk of the line_info_table. */
9855 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
9856 * sizeof (dw_line_info_entry));
9857 bzero ((char *) line_info_table,
9858 LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry));
9859 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
9860 /* Zero-th entry is allocated, but unused */
9861 line_info_table_in_use = 1;
9863 /* Generate the initial DIE for the .debug section. Note that the (string)
9864 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9865 will (typically) be a relative pathname and that this pathname should be
9866 taken as being relative to the directory from which the compiler was
9867 invoked when the given (base) source file was compiled. */
9868 gen_compile_unit_die (main_input_filename);
9870 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
9871 ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, ABBREV_SECTION_LABEL, 0);
9872 ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0);
9873 ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label,
9874 DEBUG_INFO_SECTION_LABEL, 0);
9875 ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label,
9876 DEBUG_LINE_SECTION_LABEL, 0);
9878 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
9879 ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
9880 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
9881 ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
9882 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
9883 ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
9884 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
9885 ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
9888 /* Output stuff that dwarf requires at the end of every file,
9889 and generate the DWARF-2 debugging info. */
9894 limbo_die_node *node, *next_node;
9898 /* Traverse the limbo die list, and add parent/child links. The only
9899 dies without parents that should be here are concrete instances of
9900 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9901 For concrete instances, we can get the parent die from the abstract
9903 for (node = limbo_die_list; node; node = next_node)
9905 next_node = node->next;
9908 if (die->die_parent == NULL)
9910 a = get_AT (die, DW_AT_abstract_origin);
9912 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
9913 else if (die == comp_unit_die)
9921 /* Traverse the DIE tree and add sibling attributes to those DIE's
9922 that have children. */
9923 add_sibling_attributes (comp_unit_die);
9925 /* Output a terminator label for the .text section. */
9926 fputc ('\n', asm_out_file);
9927 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
9928 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
9931 /* Output a terminator label for the .data section. */
9932 fputc ('\n', asm_out_file);
9933 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
9934 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
9936 /* Output a terminator label for the .bss section. */
9937 fputc ('\n', asm_out_file);
9938 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
9939 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
9942 /* Output the source line correspondence table. */
9943 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
9945 fputc ('\n', asm_out_file);
9946 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
9947 output_line_info ();
9949 /* We can only use the low/high_pc attributes if all of the code
9951 if (separate_line_info_table_in_use == 0)
9953 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label);
9954 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
9957 add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list,
9958 debug_line_section_label);
9961 /* Output the abbreviation table. */
9962 fputc ('\n', asm_out_file);
9963 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
9964 build_abbrev_table (comp_unit_die);
9965 output_abbrev_section ();
9967 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9968 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
9969 calc_die_sizes (comp_unit_die);
9971 /* Output debugging information. */
9972 fputc ('\n', asm_out_file);
9973 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
9974 output_compilation_unit_header ();
9975 output_die (comp_unit_die);
9977 if (pubname_table_in_use)
9979 /* Output public names table. */
9980 fputc ('\n', asm_out_file);
9981 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
9985 if (fde_table_in_use)
9987 /* Output the address range information. */
9988 fputc ('\n', asm_out_file);
9989 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
9993 #endif /* DWARF2_DEBUGGING_INFO */