1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 93, 95, 96, 97, 1998 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* The first part of this file deals with the DWARF 2 frame unwind
24 information, which is also used by the GCC efficient exception handling
25 mechanism. The second part, controlled only by an #ifdef
26 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
35 #include "hard-reg-set.h"
37 #include "insn-config.h"
45 /* We cannot use <assert.h> in GCC source, since that would include
46 GCC's assert.h, which may not be compatible with the host compiler. */
51 # define assert(e) do { if (! (e)) abort (); } while (0)
54 /* Decide whether we want to emit frame unwind information for the current
60 return (write_symbols == DWARF2_DEBUG
61 #ifdef DWARF2_UNWIND_INFO
62 || (flag_exceptions && ! exceptions_via_longjmp)
67 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
73 /* How to start an assembler comment. */
74 #ifndef ASM_COMMENT_START
75 #define ASM_COMMENT_START ";#"
78 typedef struct dw_cfi_struct *dw_cfi_ref;
79 typedef struct dw_fde_struct *dw_fde_ref;
80 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
82 /* Call frames are described using a sequence of Call Frame
83 Information instructions. The register number, offset
84 and address fields are provided as possible operands;
85 their use is selected by the opcode field. */
87 typedef union dw_cfi_oprnd_struct
89 unsigned long dw_cfi_reg_num;
90 long int dw_cfi_offset;
95 typedef struct dw_cfi_struct
97 dw_cfi_ref dw_cfi_next;
98 enum dwarf_call_frame_info dw_cfi_opc;
99 dw_cfi_oprnd dw_cfi_oprnd1;
100 dw_cfi_oprnd dw_cfi_oprnd2;
104 /* All call frame descriptions (FDE's) in the GCC generated DWARF
105 refer to a single Common Information Entry (CIE), defined at
106 the beginning of the .debug_frame section. This used of a single
107 CIE obviates the need to keep track of multiple CIE's
108 in the DWARF generation routines below. */
110 typedef struct dw_fde_struct
113 char *dw_fde_current_label;
115 dw_cfi_ref dw_fde_cfi;
119 /* Maximum size (in bytes) of an artificially generated label. */
120 #define MAX_ARTIFICIAL_LABEL_BYTES 30
122 /* Make sure we know the sizes of the various types dwarf can describe. These
123 are only defaults. If the sizes are different for your target, you should
124 override these values by defining the appropriate symbols in your tm.h
127 #ifndef CHAR_TYPE_SIZE
128 #define CHAR_TYPE_SIZE BITS_PER_UNIT
131 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
134 /* The size in bytes of a DWARF field indicating an offset or length
135 relative to a debug info section, specified to be 4 bytes in the DWARF-2
136 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
138 #ifndef DWARF_OFFSET_SIZE
139 #define DWARF_OFFSET_SIZE 4
142 #define DWARF_VERSION 2
144 /* Round SIZE up to the nearest BOUNDARY. */
145 #define DWARF_ROUND(SIZE,BOUNDARY) \
146 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
148 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
149 #ifdef STACK_GROWS_DOWNWARD
150 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
152 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
155 /* A pointer to the base of a table that contains frame description
156 information for each routine. */
157 static dw_fde_ref fde_table;
159 /* Number of elements currently allocated for fde_table. */
160 static unsigned fde_table_allocated;
162 /* Number of elements in fde_table currently in use. */
163 static unsigned fde_table_in_use;
165 /* Size (in elements) of increments by which we may expand the
167 #define FDE_TABLE_INCREMENT 256
169 /* A list of call frame insns for the CIE. */
170 static dw_cfi_ref cie_cfi_head;
172 /* The number of the current function definition for which debugging
173 information is being generated. These numbers range from 1 up to the
174 maximum number of function definitions contained within the current
175 compilation unit. These numbers are used to create unique label id's
176 unique to each function definition. */
177 static unsigned current_funcdef_number = 0;
179 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
180 attribute that accelerates the lookup of the FDE associated
181 with the subprogram. This variable holds the table index of the FDE
182 associated with the current function (body) definition. */
183 static unsigned current_funcdef_fde;
185 /* Forward declarations for functions defined in this file. */
187 static char *stripattributes PROTO((char *));
188 static char *dwarf_cfi_name PROTO((unsigned));
189 static dw_cfi_ref new_cfi PROTO((void));
190 static void add_cfi PROTO((dw_cfi_ref *, dw_cfi_ref));
191 static unsigned long size_of_uleb128 PROTO((unsigned long));
192 static unsigned long size_of_sleb128 PROTO((long));
193 static void output_uleb128 PROTO((unsigned long));
194 static void output_sleb128 PROTO((long));
195 static void add_fde_cfi PROTO((char *, dw_cfi_ref));
196 static void lookup_cfa_1 PROTO((dw_cfi_ref, unsigned long *,
198 static void lookup_cfa PROTO((unsigned long *, long *));
199 static void reg_save PROTO((char *, unsigned, unsigned,
201 static void initial_return_save PROTO((rtx));
202 static void output_cfi PROTO((dw_cfi_ref, dw_fde_ref));
203 static void output_call_frame_info PROTO((int));
204 static unsigned reg_number PROTO((rtx));
205 static void dwarf2out_stack_adjust PROTO((rtx));
207 /* Definitions of defaults for assembler-dependent names of various
208 pseudo-ops and section names.
209 Theses may be overridden in the tm.h file (if necessary) for a particular
212 #ifdef OBJECT_FORMAT_ELF
213 #ifndef UNALIGNED_SHORT_ASM_OP
214 #define UNALIGNED_SHORT_ASM_OP ".2byte"
216 #ifndef UNALIGNED_INT_ASM_OP
217 #define UNALIGNED_INT_ASM_OP ".4byte"
219 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
220 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
222 #endif /* OBJECT_FORMAT_ELF */
225 #define ASM_BYTE_OP ".byte"
228 /* Data and reference forms for relocatable data. */
229 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
230 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
232 /* Pseudo-op for defining a new section. */
233 #ifndef SECTION_ASM_OP
234 #define SECTION_ASM_OP ".section"
237 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
238 print the SECTION_ASM_OP and the section name. The default here works for
239 almost all svr4 assemblers, except for the sparc, where the section name
240 must be enclosed in double quotes. (See sparcv4.h). */
241 #ifndef SECTION_FORMAT
242 #ifdef PUSHSECTION_FORMAT
243 #define SECTION_FORMAT PUSHSECTION_FORMAT
245 #define SECTION_FORMAT "\t%s\t%s\n"
249 #ifndef FRAME_SECTION
250 #define FRAME_SECTION ".debug_frame"
253 #ifndef FUNC_BEGIN_LABEL
254 #define FUNC_BEGIN_LABEL "LFB"
256 #ifndef FUNC_END_LABEL
257 #define FUNC_END_LABEL "LFE"
259 #define CIE_AFTER_SIZE_LABEL "LSCIE"
260 #define CIE_END_LABEL "LECIE"
261 #define CIE_LENGTH_LABEL "LLCIE"
262 #define FDE_AFTER_SIZE_LABEL "LSFDE"
263 #define FDE_END_LABEL "LEFDE"
264 #define FDE_LENGTH_LABEL "LLFDE"
266 /* Definitions of defaults for various types of primitive assembly language
267 output operations. These may be overridden from within the tm.h file,
268 but typically, that is unnecessary. */
270 #ifndef ASM_OUTPUT_SECTION
271 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
272 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
275 #ifndef ASM_OUTPUT_DWARF_DATA1
276 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
277 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, VALUE)
280 #ifndef ASM_OUTPUT_DWARF_DELTA1
281 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
282 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
283 assemble_name (FILE, LABEL1); \
284 fprintf (FILE, "-"); \
285 assemble_name (FILE, LABEL2); \
289 #ifdef UNALIGNED_INT_ASM_OP
291 #ifndef UNALIGNED_OFFSET_ASM_OP
292 #define UNALIGNED_OFFSET_ASM_OP \
293 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
296 #ifndef UNALIGNED_WORD_ASM_OP
297 #define UNALIGNED_WORD_ASM_OP \
298 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
301 #ifndef ASM_OUTPUT_DWARF_DELTA2
302 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
303 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
304 assemble_name (FILE, LABEL1); \
305 fprintf (FILE, "-"); \
306 assemble_name (FILE, LABEL2); \
310 #ifndef ASM_OUTPUT_DWARF_DELTA4
311 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
312 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
313 assemble_name (FILE, LABEL1); \
314 fprintf (FILE, "-"); \
315 assemble_name (FILE, LABEL2); \
319 #ifndef ASM_OUTPUT_DWARF_DELTA
320 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
321 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
322 assemble_name (FILE, LABEL1); \
323 fprintf (FILE, "-"); \
324 assemble_name (FILE, LABEL2); \
328 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
329 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
330 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
331 assemble_name (FILE, LABEL1); \
332 fprintf (FILE, "-"); \
333 assemble_name (FILE, LABEL2); \
337 #ifndef ASM_OUTPUT_DWARF_ADDR
338 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
339 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
340 assemble_name (FILE, LABEL); \
344 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
345 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
346 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
349 #ifndef ASM_OUTPUT_DWARF_OFFSET4
350 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
351 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
352 assemble_name (FILE, LABEL); \
356 #ifndef ASM_OUTPUT_DWARF_OFFSET
357 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
358 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
359 assemble_name (FILE, LABEL); \
363 #ifndef ASM_OUTPUT_DWARF_DATA2
364 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
365 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) VALUE)
368 #ifndef ASM_OUTPUT_DWARF_DATA4
369 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
370 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) VALUE)
373 #ifndef ASM_OUTPUT_DWARF_DATA
374 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
375 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
376 (unsigned long) VALUE)
379 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
380 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
381 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
382 (unsigned long) VALUE)
385 #ifndef ASM_OUTPUT_DWARF_DATA8
386 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
388 if (WORDS_BIG_ENDIAN) \
390 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
391 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
395 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
396 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
401 #else /* UNALIGNED_INT_ASM_OP */
403 /* We don't have unaligned support, let's hope the normal output works for
406 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
407 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
409 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
410 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
412 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
413 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
415 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
416 assemble_integer (gen_rtx_MINUS (HImode, \
417 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
418 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
421 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
422 assemble_integer (gen_rtx_MINUS (SImode, \
423 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
424 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
427 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
428 assemble_integer (gen_rtx_MINUS (Pmode, \
429 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
430 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
433 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
434 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
436 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
437 assemble_integer (GEN_INT (VALUE), 4, 1)
439 #endif /* UNALIGNED_INT_ASM_OP */
442 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
443 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
445 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
446 assemble_name (FILE, SY); \
448 assemble_name (FILE, HI); \
450 assemble_name (FILE, LO); \
453 #endif /* SET_ASM_OP */
455 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
456 newline is produced. When flag_debug_asm is asserted, we add commentary
457 at the end of the line, so we must avoid output of a newline here. */
458 #ifndef ASM_OUTPUT_DWARF_STRING
459 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
461 register int slen = strlen(P); \
462 register char *p = (P); \
464 fprintf (FILE, "\t.ascii \""); \
465 for (i = 0; i < slen; i++) \
467 register int c = p[i]; \
468 if (c == '\"' || c == '\\') \
470 if (c >= ' ' && c < 0177) \
474 fprintf (FILE, "\\%o", c); \
477 fprintf (FILE, "\\0\""); \
482 /* The DWARF 2 CFA column which tracks the return address. Normally this
483 is the column for PC, or the first column after all of the hard
485 #ifndef DWARF_FRAME_RETURN_COLUMN
487 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
489 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
493 /* The mapping from gcc register number to DWARF 2 CFA column number. By
494 default, we just provide columns for all registers. */
495 #ifndef DWARF_FRAME_REGNUM
496 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
499 /* Hook used by __throw. */
502 expand_builtin_dwarf_fp_regnum ()
504 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
507 /* The offset from the incoming value of %sp to the top of the stack frame
508 for the current function. */
509 #ifndef INCOMING_FRAME_SP_OFFSET
510 #define INCOMING_FRAME_SP_OFFSET 0
513 /* Return a pointer to a copy of the section string name S with all
514 attributes stripped off. */
520 char *stripped = xstrdup (s);
523 while (*p && *p != ',')
530 /* Return the register number described by a given RTL node. */
536 register unsigned regno = REGNO (rtl);
538 if (regno >= FIRST_PSEUDO_REGISTER)
540 warning ("internal regno botch: regno = %d\n", regno);
544 regno = DBX_REGISTER_NUMBER (regno);
548 struct reg_size_range
555 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
556 We do this in kind of a roundabout way, by building up a list of
557 register size ranges and seeing where our register falls in one of those
558 ranges. We need to do it this way because REG_TREE is not a constant,
559 and the target macros were not designed to make this task easy. */
562 expand_builtin_dwarf_reg_size (reg_tree, target)
566 enum machine_mode mode;
568 struct reg_size_range ranges[5];
575 for (; i < FIRST_PSEUDO_REGISTER; ++i)
577 /* The return address is out of order on the MIPS, and we don't use
578 copy_reg for it anyway, so we don't care here how large it is. */
579 if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
582 mode = reg_raw_mode[i];
584 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
585 to use the same size as word_mode, since that reduces the number
586 of ranges we need. It should not matter, since the result should
587 never be used for a condition code register anyways. */
588 if (GET_MODE_CLASS (mode) == MODE_CC)
591 size = GET_MODE_SIZE (mode);
593 /* If this register is not valid in the specified mode and
594 we have a previous size, use that for the size of this
595 register to avoid making junk tiny ranges. */
596 if (! HARD_REGNO_MODE_OK (i, mode) && last_size != -1)
599 if (size != last_size)
601 ranges[n_ranges].beg = i;
602 ranges[n_ranges].size = last_size = size;
607 ranges[n_ranges-1].end = i;
610 /* The usual case: fp regs surrounded by general regs. */
611 if (n_ranges == 3 && ranges[0].size == ranges[2].size)
613 if ((DWARF_FRAME_REGNUM (ranges[1].end)
614 - DWARF_FRAME_REGNUM (ranges[1].beg))
615 != ranges[1].end - ranges[1].beg)
617 t = fold (build (GE_EXPR, integer_type_node, reg_tree,
618 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].beg), 0)));
619 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
620 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].end), 0)));
621 t = fold (build (TRUTH_ANDIF_EXPR, integer_type_node, t, t2));
622 t = fold (build (COND_EXPR, integer_type_node, t,
623 build_int_2 (ranges[1].size, 0),
624 build_int_2 (ranges[0].size, 0)));
629 t = build_int_2 (ranges[n_ranges].size, 0);
630 size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
633 if ((DWARF_FRAME_REGNUM (ranges[n_ranges].end)
634 - DWARF_FRAME_REGNUM (ranges[n_ranges].beg))
635 != ranges[n_ranges].end - ranges[n_ranges].beg)
637 if (DWARF_FRAME_REGNUM (ranges[n_ranges].beg) >= size)
639 size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
640 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
641 build_int_2 (DWARF_FRAME_REGNUM
642 (ranges[n_ranges].end), 0)));
643 t = fold (build (COND_EXPR, integer_type_node, t2,
644 build_int_2 (ranges[n_ranges].size, 0), t));
647 return expand_expr (t, target, Pmode, 0);
650 /* Convert a DWARF call frame info. operation to its string name */
653 dwarf_cfi_name (cfi_opc)
654 register unsigned cfi_opc;
658 case DW_CFA_advance_loc:
659 return "DW_CFA_advance_loc";
661 return "DW_CFA_offset";
663 return "DW_CFA_restore";
667 return "DW_CFA_set_loc";
668 case DW_CFA_advance_loc1:
669 return "DW_CFA_advance_loc1";
670 case DW_CFA_advance_loc2:
671 return "DW_CFA_advance_loc2";
672 case DW_CFA_advance_loc4:
673 return "DW_CFA_advance_loc4";
674 case DW_CFA_offset_extended:
675 return "DW_CFA_offset_extended";
676 case DW_CFA_restore_extended:
677 return "DW_CFA_restore_extended";
678 case DW_CFA_undefined:
679 return "DW_CFA_undefined";
680 case DW_CFA_same_value:
681 return "DW_CFA_same_value";
682 case DW_CFA_register:
683 return "DW_CFA_register";
684 case DW_CFA_remember_state:
685 return "DW_CFA_remember_state";
686 case DW_CFA_restore_state:
687 return "DW_CFA_restore_state";
689 return "DW_CFA_def_cfa";
690 case DW_CFA_def_cfa_register:
691 return "DW_CFA_def_cfa_register";
692 case DW_CFA_def_cfa_offset:
693 return "DW_CFA_def_cfa_offset";
695 /* SGI/MIPS specific */
696 case DW_CFA_MIPS_advance_loc8:
697 return "DW_CFA_MIPS_advance_loc8";
700 case DW_CFA_GNU_window_save:
701 return "DW_CFA_GNU_window_save";
702 case DW_CFA_GNU_args_size:
703 return "DW_CFA_GNU_args_size";
706 return "DW_CFA_<unknown>";
710 /* Return a pointer to a newly allocated Call Frame Instruction. */
712 static inline dw_cfi_ref
715 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
717 cfi->dw_cfi_next = NULL;
718 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
719 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
724 /* Add a Call Frame Instruction to list of instructions. */
727 add_cfi (list_head, cfi)
728 register dw_cfi_ref *list_head;
729 register dw_cfi_ref cfi;
731 register dw_cfi_ref *p;
733 /* Find the end of the chain. */
734 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
740 /* Generate a new label for the CFI info to refer to. */
743 dwarf2out_cfi_label ()
745 static char label[20];
746 static unsigned long label_num = 0;
748 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
749 ASM_OUTPUT_LABEL (asm_out_file, label);
754 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
755 or to the CIE if LABEL is NULL. */
758 add_fde_cfi (label, cfi)
759 register char *label;
760 register dw_cfi_ref cfi;
764 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
767 label = dwarf2out_cfi_label ();
769 if (fde->dw_fde_current_label == NULL
770 || strcmp (label, fde->dw_fde_current_label) != 0)
772 register dw_cfi_ref xcfi;
774 fde->dw_fde_current_label = label = xstrdup (label);
776 /* Set the location counter to the new label. */
778 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
779 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
780 add_cfi (&fde->dw_fde_cfi, xcfi);
783 add_cfi (&fde->dw_fde_cfi, cfi);
787 add_cfi (&cie_cfi_head, cfi);
790 /* Subroutine of lookup_cfa. */
793 lookup_cfa_1 (cfi, regp, offsetp)
794 register dw_cfi_ref cfi;
795 register unsigned long *regp;
796 register long *offsetp;
798 switch (cfi->dw_cfi_opc)
800 case DW_CFA_def_cfa_offset:
801 *offsetp = cfi->dw_cfi_oprnd1.dw_cfi_offset;
803 case DW_CFA_def_cfa_register:
804 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
807 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
808 *offsetp = cfi->dw_cfi_oprnd2.dw_cfi_offset;
815 /* Find the previous value for the CFA. */
818 lookup_cfa (regp, offsetp)
819 register unsigned long *regp;
820 register long *offsetp;
822 register dw_cfi_ref cfi;
824 *regp = (unsigned long) -1;
827 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
828 lookup_cfa_1 (cfi, regp, offsetp);
830 if (fde_table_in_use)
832 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
833 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
834 lookup_cfa_1 (cfi, regp, offsetp);
838 /* The current rule for calculating the DWARF2 canonical frame address. */
839 static unsigned long cfa_reg;
840 static long cfa_offset;
842 /* The register used for saving registers to the stack, and its offset
844 static unsigned cfa_store_reg;
845 static long cfa_store_offset;
847 /* The running total of the size of arguments pushed onto the stack. */
848 static long args_size;
850 /* The last args_size we actually output. */
851 static long old_args_size;
853 /* Entry point to update the canonical frame address (CFA).
854 LABEL is passed to add_fde_cfi. The value of CFA is now to be
855 calculated from REG+OFFSET. */
858 dwarf2out_def_cfa (label, reg, offset)
859 register char *label;
860 register unsigned reg;
861 register long offset;
863 register dw_cfi_ref cfi;
864 unsigned long old_reg;
869 if (cfa_store_reg == reg)
870 cfa_store_offset = offset;
872 reg = DWARF_FRAME_REGNUM (reg);
873 lookup_cfa (&old_reg, &old_offset);
875 if (reg == old_reg && offset == old_offset)
882 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
883 cfi->dw_cfi_oprnd1.dw_cfi_offset = offset;
886 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
887 else if (offset == old_offset && old_reg != (unsigned long) -1)
889 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
890 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
896 cfi->dw_cfi_opc = DW_CFA_def_cfa;
897 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
898 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
901 add_fde_cfi (label, cfi);
904 /* Add the CFI for saving a register. REG is the CFA column number.
905 LABEL is passed to add_fde_cfi.
906 If SREG is -1, the register is saved at OFFSET from the CFA;
907 otherwise it is saved in SREG. */
910 reg_save (label, reg, sreg, offset)
911 register char * label;
912 register unsigned reg;
913 register unsigned sreg;
914 register long offset;
916 register dw_cfi_ref cfi = new_cfi ();
918 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
920 /* The following comparison is correct. -1 is used to indicate that
921 the value isn't a register number. */
922 if (sreg == (unsigned int) -1)
925 /* The register number won't fit in 6 bits, so we have to use
927 cfi->dw_cfi_opc = DW_CFA_offset_extended;
929 cfi->dw_cfi_opc = DW_CFA_offset;
931 offset /= DWARF_CIE_DATA_ALIGNMENT;
934 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
938 cfi->dw_cfi_opc = DW_CFA_register;
939 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
942 add_fde_cfi (label, cfi);
945 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
946 This CFI tells the unwinder that it needs to restore the window registers
947 from the previous frame's window save area.
949 ??? Perhaps we should note in the CIE where windows are saved (instead of
950 assuming 0(cfa)) and what registers are in the window. */
953 dwarf2out_window_save (label)
954 register char * label;
956 register dw_cfi_ref cfi = new_cfi ();
957 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
958 add_fde_cfi (label, cfi);
961 /* Add a CFI to update the running total of the size of arguments
962 pushed onto the stack. */
965 dwarf2out_args_size (label, size)
969 register dw_cfi_ref cfi;
971 if (size == old_args_size)
973 old_args_size = size;
976 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
977 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
978 add_fde_cfi (label, cfi);
981 /* Entry point for saving a register to the stack. REG is the GCC register
982 number. LABEL and OFFSET are passed to reg_save. */
985 dwarf2out_reg_save (label, reg, offset)
986 register char * label;
987 register unsigned reg;
988 register long offset;
990 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
993 /* Entry point for saving the return address in the stack.
994 LABEL and OFFSET are passed to reg_save. */
997 dwarf2out_return_save (label, offset)
998 register char * label;
999 register long offset;
1001 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1004 /* Entry point for saving the return address in a register.
1005 LABEL and SREG are passed to reg_save. */
1008 dwarf2out_return_reg (label, sreg)
1009 register char * label;
1010 register unsigned sreg;
1012 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1015 /* Record the initial position of the return address. RTL is
1016 INCOMING_RETURN_ADDR_RTX. */
1019 initial_return_save (rtl)
1025 switch (GET_CODE (rtl))
1028 /* RA is in a register. */
1029 reg = reg_number (rtl);
1032 /* RA is on the stack. */
1033 rtl = XEXP (rtl, 0);
1034 switch (GET_CODE (rtl))
1037 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1042 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1044 offset = INTVAL (XEXP (rtl, 1));
1047 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1049 offset = -INTVAL (XEXP (rtl, 1));
1056 /* The return address is at some offset from any value we can
1057 actually load. For instance, on the SPARC it is in %i7+8. Just
1058 ignore the offset for now; it doesn't matter for unwinding frames. */
1059 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1061 initial_return_save (XEXP (rtl, 0));
1067 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa_offset);
1070 /* Check INSN to see if it looks like a push or a stack adjustment, and
1071 make a note of it if it does. EH uses this information to find out how
1072 much extra space it needs to pop off the stack. */
1075 dwarf2out_stack_adjust (insn)
1081 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1083 /* Extract the size of the args from the CALL rtx itself. */
1085 insn = PATTERN (insn);
1086 if (GET_CODE (insn) == PARALLEL)
1087 insn = XVECEXP (insn, 0, 0);
1088 if (GET_CODE (insn) == SET)
1089 insn = SET_SRC (insn);
1090 assert (GET_CODE (insn) == CALL);
1091 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1095 /* If only calls can throw, and we have a frame pointer,
1096 save up adjustments until we see the CALL_INSN. */
1097 else if (! asynchronous_exceptions
1098 && cfa_reg != STACK_POINTER_REGNUM)
1101 if (GET_CODE (insn) == BARRIER)
1103 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1104 the compiler will have already emitted a stack adjustment, but
1105 doesn't bother for calls to noreturn functions. */
1106 #ifdef STACK_GROWS_DOWNWARD
1107 offset = -args_size;
1112 else if (GET_CODE (PATTERN (insn)) == SET)
1117 insn = PATTERN (insn);
1118 src = SET_SRC (insn);
1119 dest = SET_DEST (insn);
1121 if (dest == stack_pointer_rtx)
1123 /* (set (reg sp) (plus (reg sp) (const_int))) */
1124 code = GET_CODE (src);
1125 if (! (code == PLUS || code == MINUS)
1126 || XEXP (src, 0) != stack_pointer_rtx
1127 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1130 offset = INTVAL (XEXP (src, 1));
1132 else if (GET_CODE (dest) == MEM)
1134 /* (set (mem (pre_dec (reg sp))) (foo)) */
1135 src = XEXP (dest, 0);
1136 code = GET_CODE (src);
1138 if (! (code == PRE_DEC || code == PRE_INC)
1139 || XEXP (src, 0) != stack_pointer_rtx)
1142 offset = GET_MODE_SIZE (GET_MODE (dest));
1147 if (code == PLUS || code == PRE_INC)
1156 if (cfa_reg == STACK_POINTER_REGNUM)
1157 cfa_offset += offset;
1159 #ifndef STACK_GROWS_DOWNWARD
1162 args_size += offset;
1166 label = dwarf2out_cfi_label ();
1167 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1168 dwarf2out_args_size (label, args_size);
1171 /* Record call frame debugging information for INSN, which either
1172 sets SP or FP (adjusting how we calculate the frame address) or saves a
1173 register to the stack. If INSN is NULL_RTX, initialize our state. */
1176 dwarf2out_frame_debug (insn)
1183 /* A temporary register used in adjusting SP or setting up the store_reg. */
1184 static unsigned cfa_temp_reg;
1185 static long cfa_temp_value;
1187 if (insn == NULL_RTX)
1189 /* Set up state for generating call frame debug info. */
1190 lookup_cfa (&cfa_reg, &cfa_offset);
1191 if (cfa_reg != DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1193 cfa_reg = STACK_POINTER_REGNUM;
1194 cfa_store_reg = cfa_reg;
1195 cfa_store_offset = cfa_offset;
1201 if (! RTX_FRAME_RELATED_P (insn))
1203 dwarf2out_stack_adjust (insn);
1207 label = dwarf2out_cfi_label ();
1209 insn = PATTERN (insn);
1210 /* Assume that in a PARALLEL prologue insn, only the first elt is
1211 significant. Currently this is true. */
1212 if (GET_CODE (insn) == PARALLEL)
1213 insn = XVECEXP (insn, 0, 0);
1214 if (GET_CODE (insn) != SET)
1217 src = SET_SRC (insn);
1218 dest = SET_DEST (insn);
1220 switch (GET_CODE (dest))
1223 /* Update the CFA rule wrt SP or FP. Make sure src is
1224 relative to the current CFA register. */
1225 switch (GET_CODE (src))
1227 /* Setting FP from SP. */
1229 if (cfa_reg != REGNO (src))
1231 if (REGNO (dest) != STACK_POINTER_REGNUM
1232 && !(frame_pointer_needed
1233 && REGNO (dest) == HARD_FRAME_POINTER_REGNUM))
1235 cfa_reg = REGNO (dest);
1240 if (dest == stack_pointer_rtx)
1243 switch (GET_CODE (XEXP (src, 1)))
1246 offset = INTVAL (XEXP (src, 1));
1249 if (REGNO (XEXP (src, 1)) != cfa_temp_reg)
1251 offset = cfa_temp_value;
1257 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1259 /* Restoring SP from FP in the epilogue. */
1260 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1262 cfa_reg = STACK_POINTER_REGNUM;
1264 else if (XEXP (src, 0) != stack_pointer_rtx)
1267 if (GET_CODE (src) == PLUS)
1269 if (cfa_reg == STACK_POINTER_REGNUM)
1270 cfa_offset += offset;
1271 if (cfa_store_reg == STACK_POINTER_REGNUM)
1272 cfa_store_offset += offset;
1274 else if (dest == hard_frame_pointer_rtx)
1276 /* Either setting the FP from an offset of the SP,
1277 or adjusting the FP */
1278 if (! frame_pointer_needed
1279 || REGNO (dest) != HARD_FRAME_POINTER_REGNUM)
1282 if (XEXP (src, 0) == stack_pointer_rtx
1283 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1285 if (cfa_reg != STACK_POINTER_REGNUM)
1287 offset = INTVAL (XEXP (src, 1));
1288 if (GET_CODE (src) == PLUS)
1290 cfa_offset += offset;
1291 cfa_reg = HARD_FRAME_POINTER_REGNUM;
1293 else if (XEXP (src, 0) == hard_frame_pointer_rtx
1294 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1296 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1298 offset = INTVAL (XEXP (src, 1));
1299 if (GET_CODE (src) == PLUS)
1301 cfa_offset += offset;
1309 if (GET_CODE (src) != PLUS
1310 || XEXP (src, 1) != stack_pointer_rtx)
1312 if (GET_CODE (XEXP (src, 0)) != REG
1313 || REGNO (XEXP (src, 0)) != cfa_temp_reg)
1315 if (cfa_reg != STACK_POINTER_REGNUM)
1317 cfa_store_reg = REGNO (dest);
1318 cfa_store_offset = cfa_offset - cfa_temp_value;
1323 cfa_temp_reg = REGNO (dest);
1324 cfa_temp_value = INTVAL (src);
1328 if (GET_CODE (XEXP (src, 0)) != REG
1329 || REGNO (XEXP (src, 0)) != cfa_temp_reg
1330 || REGNO (dest) != cfa_temp_reg
1331 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1333 cfa_temp_value |= INTVAL (XEXP (src, 1));
1339 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1343 /* Saving a register to the stack. Make sure dest is relative to the
1345 if (GET_CODE (src) != REG)
1347 switch (GET_CODE (XEXP (dest, 0)))
1352 offset = GET_MODE_SIZE (GET_MODE (dest));
1353 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1356 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1357 || cfa_store_reg != STACK_POINTER_REGNUM)
1359 cfa_store_offset += offset;
1360 if (cfa_reg == STACK_POINTER_REGNUM)
1361 cfa_offset = cfa_store_offset;
1363 offset = -cfa_store_offset;
1366 /* With an offset. */
1369 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1370 if (GET_CODE (src) == MINUS)
1373 if (cfa_store_reg != REGNO (XEXP (XEXP (dest, 0), 0)))
1375 offset -= cfa_store_offset;
1381 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1382 dwarf2out_reg_save (label, REGNO (src), offset);
1390 /* Return the size of an unsigned LEB128 quantity. */
1392 static inline unsigned long
1393 size_of_uleb128 (value)
1394 register unsigned long value;
1396 register unsigned long size = 0;
1397 register unsigned byte;
1401 byte = (value & 0x7f);
1410 /* Return the size of a signed LEB128 quantity. */
1412 static inline unsigned long
1413 size_of_sleb128 (value)
1414 register long value;
1416 register unsigned long size = 0;
1417 register unsigned byte;
1421 byte = (value & 0x7f);
1425 while (!(((value == 0) && ((byte & 0x40) == 0))
1426 || ((value == -1) && ((byte & 0x40) != 0))));
1431 /* Output an unsigned LEB128 quantity. */
1434 output_uleb128 (value)
1435 register unsigned long value;
1437 unsigned long save_value = value;
1439 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1442 register unsigned byte = (value & 0x7f);
1445 /* More bytes to follow. */
1448 fprintf (asm_out_file, "0x%x", byte);
1450 fprintf (asm_out_file, ",");
1455 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1458 /* Output an signed LEB128 quantity. */
1461 output_sleb128 (value)
1462 register long value;
1465 register unsigned byte;
1466 long save_value = value;
1468 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1471 byte = (value & 0x7f);
1472 /* arithmetic shift */
1474 more = !((((value == 0) && ((byte & 0x40) == 0))
1475 || ((value == -1) && ((byte & 0x40) != 0))));
1479 fprintf (asm_out_file, "0x%x", byte);
1481 fprintf (asm_out_file, ",");
1486 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1489 /* Output a Call Frame Information opcode and its operand(s). */
1492 output_cfi (cfi, fde)
1493 register dw_cfi_ref cfi;
1494 register dw_fde_ref fde;
1496 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1498 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1500 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1502 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1503 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1504 fputc ('\n', asm_out_file);
1507 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1509 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1511 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1513 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1514 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1516 fputc ('\n', asm_out_file);
1517 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1518 fputc ('\n', asm_out_file);
1520 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1522 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1524 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1526 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1527 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1529 fputc ('\n', asm_out_file);
1533 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1535 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1536 dwarf_cfi_name (cfi->dw_cfi_opc));
1538 fputc ('\n', asm_out_file);
1539 switch (cfi->dw_cfi_opc)
1541 case DW_CFA_set_loc:
1542 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1543 fputc ('\n', asm_out_file);
1545 case DW_CFA_advance_loc1:
1546 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1547 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1548 fde->dw_fde_current_label);
1549 fputc ('\n', asm_out_file);
1550 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1552 case DW_CFA_advance_loc2:
1553 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1554 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1555 fde->dw_fde_current_label);
1556 fputc ('\n', asm_out_file);
1557 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1559 case DW_CFA_advance_loc4:
1560 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1561 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1562 fde->dw_fde_current_label);
1563 fputc ('\n', asm_out_file);
1564 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1566 #ifdef MIPS_DEBUGGING_INFO
1567 case DW_CFA_MIPS_advance_loc8:
1568 /* TODO: not currently implemented. */
1572 case DW_CFA_offset_extended:
1573 case DW_CFA_def_cfa:
1574 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1575 fputc ('\n', asm_out_file);
1576 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1577 fputc ('\n', asm_out_file);
1579 case DW_CFA_restore_extended:
1580 case DW_CFA_undefined:
1581 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1582 fputc ('\n', asm_out_file);
1584 case DW_CFA_same_value:
1585 case DW_CFA_def_cfa_register:
1586 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1587 fputc ('\n', asm_out_file);
1589 case DW_CFA_register:
1590 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1591 fputc ('\n', asm_out_file);
1592 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1593 fputc ('\n', asm_out_file);
1595 case DW_CFA_def_cfa_offset:
1596 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1597 fputc ('\n', asm_out_file);
1599 case DW_CFA_GNU_window_save:
1601 case DW_CFA_GNU_args_size:
1602 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1603 fputc ('\n', asm_out_file);
1611 #if !defined (EH_FRAME_SECTION)
1612 #if defined (EH_FRAME_SECTION_ASM_OP)
1613 #define EH_FRAME_SECTION() eh_frame_section();
1615 #if defined (ASM_OUTPUT_SECTION_NAME)
1616 #define EH_FRAME_SECTION() \
1618 named_section (NULL_TREE, ".eh_frame", 0); \
1624 /* Output the call frame information used to used to record information
1625 that relates to calculating the frame pointer, and records the
1626 location of saved registers. */
1629 output_call_frame_info (for_eh)
1632 register unsigned long i;
1633 register dw_fde_ref fde;
1634 register dw_cfi_ref cfi;
1635 char l1[20], l2[20];
1636 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1640 /* Do we want to include a pointer to the exception table? */
1641 int eh_ptr = for_eh && exception_table_p ();
1643 fputc ('\n', asm_out_file);
1645 /* We're going to be generating comments, so turn on app. */
1651 #ifdef EH_FRAME_SECTION
1652 EH_FRAME_SECTION ();
1654 tree label = get_file_function_name ('F');
1657 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1658 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1659 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1661 assemble_label ("__FRAME_BEGIN__");
1664 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1666 /* Output the CIE. */
1667 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1668 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1669 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1670 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1672 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1674 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1677 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1679 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1682 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1685 fputc ('\n', asm_out_file);
1686 ASM_OUTPUT_LABEL (asm_out_file, l1);
1689 /* Now that the CIE pointer is PC-relative for EH,
1690 use 0 to identify the CIE. */
1691 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1693 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1696 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1698 fputc ('\n', asm_out_file);
1699 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1701 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1702 fputc ('\n', asm_out_file);
1705 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1707 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1709 fputc ('\n', asm_out_file);
1712 /* The CIE contains a pointer to the exception region info for the
1713 frame. Make the augmentation string three bytes (including the
1714 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1715 can't handle unaligned relocs. */
1718 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1719 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1723 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1725 fputc ('\n', asm_out_file);
1727 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1729 fprintf (asm_out_file, "\t%s pointer to exception region info",
1734 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1736 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1740 fputc ('\n', asm_out_file);
1743 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1745 fputc ('\n', asm_out_file);
1746 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1748 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1750 fputc ('\n', asm_out_file);
1751 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1753 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1755 fputc ('\n', asm_out_file);
1757 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1758 output_cfi (cfi, NULL);
1760 /* Pad the CIE out to an address sized boundary. */
1761 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1762 ASM_OUTPUT_LABEL (asm_out_file, l2);
1763 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1764 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1766 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1767 fputc ('\n', asm_out_file);
1770 /* Loop through all of the FDE's. */
1771 for (i = 0; i < fde_table_in_use; ++i)
1773 fde = &fde_table[i];
1775 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1776 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1777 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1778 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1780 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1782 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1785 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1787 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1790 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1791 fputc ('\n', asm_out_file);
1792 ASM_OUTPUT_LABEL (asm_out_file, l1);
1795 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l1, "__FRAME_BEGIN__");
1797 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1799 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1801 fputc ('\n', asm_out_file);
1802 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1804 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1806 fputc ('\n', asm_out_file);
1807 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1808 fde->dw_fde_end, fde->dw_fde_begin);
1810 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1812 fputc ('\n', asm_out_file);
1814 /* Loop through the Call Frame Instructions associated with
1816 fde->dw_fde_current_label = fde->dw_fde_begin;
1817 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1818 output_cfi (cfi, fde);
1820 /* Pad the FDE out to an address sized boundary. */
1821 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1822 ASM_OUTPUT_LABEL (asm_out_file, l2);
1823 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1824 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1826 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1827 fputc ('\n', asm_out_file);
1830 #ifndef EH_FRAME_SECTION
1833 /* Emit terminating zero for table. */
1834 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1835 fputc ('\n', asm_out_file);
1838 #ifdef MIPS_DEBUGGING_INFO
1839 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1840 get a value of 0. Putting .align 0 after the label fixes it. */
1841 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1844 /* Turn off app to make assembly quicker. */
1849 /* Output a marker (i.e. a label) for the beginning of a function, before
1853 dwarf2out_begin_prologue ()
1855 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1856 register dw_fde_ref fde;
1858 ++current_funcdef_number;
1860 function_section (current_function_decl);
1861 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1862 current_funcdef_number);
1863 ASM_OUTPUT_LABEL (asm_out_file, label);
1865 /* Expand the fde table if necessary. */
1866 if (fde_table_in_use == fde_table_allocated)
1868 fde_table_allocated += FDE_TABLE_INCREMENT;
1870 = (dw_fde_ref) xrealloc (fde_table,
1871 fde_table_allocated * sizeof (dw_fde_node));
1874 /* Record the FDE associated with this function. */
1875 current_funcdef_fde = fde_table_in_use;
1877 /* Add the new FDE at the end of the fde_table. */
1878 fde = &fde_table[fde_table_in_use++];
1879 fde->dw_fde_begin = xstrdup (label);
1880 fde->dw_fde_current_label = NULL;
1881 fde->dw_fde_end = NULL;
1882 fde->dw_fde_cfi = NULL;
1884 args_size = old_args_size = 0;
1887 /* Output a marker (i.e. a label) for the absolute end of the generated code
1888 for a function definition. This gets called *after* the epilogue code has
1892 dwarf2out_end_epilogue ()
1895 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1897 /* Output a label to mark the endpoint of the code generated for this
1899 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
1900 ASM_OUTPUT_LABEL (asm_out_file, label);
1901 fde = &fde_table[fde_table_in_use - 1];
1902 fde->dw_fde_end = xstrdup (label);
1906 dwarf2out_frame_init ()
1908 /* Allocate the initial hunk of the fde_table. */
1910 = (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1911 bzero ((char *) fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1912 fde_table_allocated = FDE_TABLE_INCREMENT;
1913 fde_table_in_use = 0;
1915 /* Generate the CFA instructions common to all FDE's. Do it now for the
1916 sake of lookup_cfa. */
1918 #ifdef DWARF2_UNWIND_INFO
1919 /* On entry, the Canonical Frame Address is at SP. */
1920 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
1921 initial_return_save (INCOMING_RETURN_ADDR_RTX);
1926 dwarf2out_frame_finish ()
1928 /* Output call frame information. */
1929 #ifdef MIPS_DEBUGGING_INFO
1930 if (write_symbols == DWARF2_DEBUG)
1931 output_call_frame_info (0);
1932 if (flag_exceptions && ! exceptions_via_longjmp)
1933 output_call_frame_info (1);
1935 if (write_symbols == DWARF2_DEBUG
1936 || (flag_exceptions && ! exceptions_via_longjmp))
1937 output_call_frame_info (1);
1941 #endif /* .debug_frame support */
1943 /* And now, the support for symbolic debugging information. */
1944 #ifdef DWARF2_DEBUGGING_INFO
1946 extern char *getpwd ();
1948 /* NOTE: In the comments in this file, many references are made to
1949 "Debugging Information Entries". This term is abbreviated as `DIE'
1950 throughout the remainder of this file. */
1952 /* An internal representation of the DWARF output is built, and then
1953 walked to generate the DWARF debugging info. The walk of the internal
1954 representation is done after the entire program has been compiled.
1955 The types below are used to describe the internal representation. */
1957 /* Each DIE may have a series of attribute/value pairs. Values
1958 can take on several forms. The forms that are used in this
1959 implementation are listed below. */
1966 dw_val_class_unsigned_const,
1967 dw_val_class_long_long,
1970 dw_val_class_die_ref,
1971 dw_val_class_fde_ref,
1972 dw_val_class_lbl_id,
1973 dw_val_class_section_offset,
1978 /* Various DIE's use offsets relative to the beginning of the
1979 .debug_info section to refer to each other. */
1981 typedef long int dw_offset;
1983 /* Define typedefs here to avoid circular dependencies. */
1985 typedef struct die_struct *dw_die_ref;
1986 typedef struct dw_attr_struct *dw_attr_ref;
1987 typedef struct dw_val_struct *dw_val_ref;
1988 typedef struct dw_line_info_struct *dw_line_info_ref;
1989 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
1990 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
1991 typedef struct pubname_struct *pubname_ref;
1992 typedef dw_die_ref *arange_ref;
1994 /* Describe a double word constant value. */
1996 typedef struct dw_long_long_struct
2003 /* Describe a floating point constant value. */
2005 typedef struct dw_fp_struct
2012 /* Each entry in the line_info_table maintains the file and
2013 line number associated with the label generated for that
2014 entry. The label gives the PC value associated with
2015 the line number entry. */
2017 typedef struct dw_line_info_struct
2019 unsigned long dw_file_num;
2020 unsigned long dw_line_num;
2024 /* Line information for functions in separate sections; each one gets its
2026 typedef struct dw_separate_line_info_struct
2028 unsigned long dw_file_num;
2029 unsigned long dw_line_num;
2030 unsigned long function;
2032 dw_separate_line_info_entry;
2034 /* The dw_val_node describes an attribute's value, as it is
2035 represented internally. */
2037 typedef struct dw_val_struct
2039 dw_val_class val_class;
2043 dw_loc_descr_ref val_loc;
2045 long unsigned val_unsigned;
2046 dw_long_long_const val_long_long;
2047 dw_float_const val_float;
2048 dw_die_ref val_die_ref;
2049 unsigned val_fde_index;
2053 unsigned char val_flag;
2059 /* Locations in memory are described using a sequence of stack machine
2062 typedef struct dw_loc_descr_struct
2064 dw_loc_descr_ref dw_loc_next;
2065 enum dwarf_location_atom dw_loc_opc;
2066 dw_val_node dw_loc_oprnd1;
2067 dw_val_node dw_loc_oprnd2;
2071 /* Each DIE attribute has a field specifying the attribute kind,
2072 a link to the next attribute in the chain, and an attribute value.
2073 Attributes are typically linked below the DIE they modify. */
2075 typedef struct dw_attr_struct
2077 enum dwarf_attribute dw_attr;
2078 dw_attr_ref dw_attr_next;
2079 dw_val_node dw_attr_val;
2083 /* The Debugging Information Entry (DIE) structure */
2085 typedef struct die_struct
2087 enum dwarf_tag die_tag;
2088 dw_attr_ref die_attr;
2089 dw_attr_ref die_attr_last;
2090 dw_die_ref die_parent;
2091 dw_die_ref die_child;
2092 dw_die_ref die_child_last;
2094 dw_offset die_offset;
2095 unsigned long die_abbrev;
2099 /* The pubname structure */
2101 typedef struct pubname_struct
2108 /* The limbo die list structure. */
2109 typedef struct limbo_die_struct
2112 struct limbo_die_struct *next;
2116 /* How to start an assembler comment. */
2117 #ifndef ASM_COMMENT_START
2118 #define ASM_COMMENT_START ";#"
2121 /* Define a macro which returns non-zero for a TYPE_DECL which was
2122 implicitly generated for a tagged type.
2124 Note that unlike the gcc front end (which generates a NULL named
2125 TYPE_DECL node for each complete tagged type, each array type, and
2126 each function type node created) the g++ front end generates a
2127 _named_ TYPE_DECL node for each tagged type node created.
2128 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2129 generate a DW_TAG_typedef DIE for them. */
2131 #define TYPE_DECL_IS_STUB(decl) \
2132 (DECL_NAME (decl) == NULL_TREE \
2133 || (DECL_ARTIFICIAL (decl) \
2134 && is_tagged_type (TREE_TYPE (decl)) \
2135 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2136 /* This is necessary for stub decls that \
2137 appear in nested inline functions. */ \
2138 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2139 && (decl_ultimate_origin (decl) \
2140 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2142 /* Information concerning the compilation unit's programming
2143 language, and compiler version. */
2145 extern int flag_traditional;
2146 extern char *version_string;
2147 extern char *language_string;
2149 /* Fixed size portion of the DWARF compilation unit header. */
2150 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2152 /* Fixed size portion of debugging line information prolog. */
2153 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2155 /* Fixed size portion of public names info. */
2156 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2158 /* Fixed size portion of the address range info. */
2159 #define DWARF_ARANGES_HEADER_SIZE \
2160 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2162 /* Define the architecture-dependent minimum instruction length (in bytes).
2163 In this implementation of DWARF, this field is used for information
2164 purposes only. Since GCC generates assembly language, we have
2165 no a priori knowledge of how many instruction bytes are generated
2166 for each source line, and therefore can use only the DW_LNE_set_address
2167 and DW_LNS_fixed_advance_pc line information commands. */
2169 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2170 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2173 /* Minimum line offset in a special line info. opcode.
2174 This value was chosen to give a reasonable range of values. */
2175 #define DWARF_LINE_BASE -10
2177 /* First special line opcde - leave room for the standard opcodes. */
2178 #define DWARF_LINE_OPCODE_BASE 10
2180 /* Range of line offsets in a special line info. opcode. */
2181 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2183 /* Flag that indicates the initial value of the is_stmt_start flag.
2184 In the present implementation, we do not mark any lines as
2185 the beginning of a source statement, because that information
2186 is not made available by the GCC front-end. */
2187 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2189 /* This location is used by calc_die_sizes() to keep track
2190 the offset of each DIE within the .debug_info section. */
2191 static unsigned long next_die_offset;
2193 /* Record the root of the DIE's built for the current compilation unit. */
2194 static dw_die_ref comp_unit_die;
2196 /* A list of DIEs with a NULL parent waiting to be relocated. */
2197 static limbo_die_node *limbo_die_list = 0;
2199 /* Pointer to an array of filenames referenced by this compilation unit. */
2200 static char **file_table;
2202 /* Total number of entries in the table (i.e. array) pointed to by
2203 `file_table'. This is the *total* and includes both used and unused
2205 static unsigned file_table_allocated;
2207 /* Number of entries in the file_table which are actually in use. */
2208 static unsigned file_table_in_use;
2210 /* Size (in elements) of increments by which we may expand the filename
2212 #define FILE_TABLE_INCREMENT 64
2214 /* Local pointer to the name of the main input file. Initialized in
2216 static char *primary_filename;
2218 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2219 which their beginnings are encountered. We output Dwarf debugging info
2220 that refers to the beginnings and ends of the ranges of code for each
2221 lexical block. The labels themselves are generated in final.c, which
2222 assigns numbers to the blocks in the same way. */
2223 static unsigned next_block_number = 2;
2225 /* A pointer to the base of a table of references to DIE's that describe
2226 declarations. The table is indexed by DECL_UID() which is a unique
2227 number identifying each decl. */
2228 static dw_die_ref *decl_die_table;
2230 /* Number of elements currently allocated for the decl_die_table. */
2231 static unsigned decl_die_table_allocated;
2233 /* Number of elements in decl_die_table currently in use. */
2234 static unsigned decl_die_table_in_use;
2236 /* Size (in elements) of increments by which we may expand the
2238 #define DECL_DIE_TABLE_INCREMENT 256
2240 /* Structure used for the decl_scope table. scope is the current declaration
2241 scope, and previous is the entry that is the parent of this scope. This
2242 is usually but not always the immediately preceeding entry. */
2244 typedef struct decl_scope_struct
2251 /* A pointer to the base of a table of references to declaration
2252 scopes. This table is a display which tracks the nesting
2253 of declaration scopes at the current scope and containing
2254 scopes. This table is used to find the proper place to
2255 define type declaration DIE's. */
2256 static decl_scope_node *decl_scope_table;
2258 /* Number of elements currently allocated for the decl_scope_table. */
2259 static int decl_scope_table_allocated;
2261 /* Current level of nesting of declaration scopes. */
2262 static int decl_scope_depth;
2264 /* Size (in elements) of increments by which we may expand the
2265 decl_scope_table. */
2266 #define DECL_SCOPE_TABLE_INCREMENT 64
2268 /* A pointer to the base of a list of references to DIE's that
2269 are uniquely identified by their tag, presence/absence of
2270 children DIE's, and list of attribute/value pairs. */
2271 static dw_die_ref *abbrev_die_table;
2273 /* Number of elements currently allocated for abbrev_die_table. */
2274 static unsigned abbrev_die_table_allocated;
2276 /* Number of elements in type_die_table currently in use. */
2277 static unsigned abbrev_die_table_in_use;
2279 /* Size (in elements) of increments by which we may expand the
2280 abbrev_die_table. */
2281 #define ABBREV_DIE_TABLE_INCREMENT 256
2283 /* A pointer to the base of a table that contains line information
2284 for each source code line in .text in the compilation unit. */
2285 static dw_line_info_ref line_info_table;
2287 /* Number of elements currently allocated for line_info_table. */
2288 static unsigned line_info_table_allocated;
2290 /* Number of elements in separate_line_info_table currently in use. */
2291 static unsigned separate_line_info_table_in_use;
2293 /* A pointer to the base of a table that contains line information
2294 for each source code line outside of .text in the compilation unit. */
2295 static dw_separate_line_info_ref separate_line_info_table;
2297 /* Number of elements currently allocated for separate_line_info_table. */
2298 static unsigned separate_line_info_table_allocated;
2300 /* Number of elements in line_info_table currently in use. */
2301 static unsigned line_info_table_in_use;
2303 /* Size (in elements) of increments by which we may expand the
2305 #define LINE_INFO_TABLE_INCREMENT 1024
2307 /* A pointer to the base of a table that contains a list of publicly
2308 accessible names. */
2309 static pubname_ref pubname_table;
2311 /* Number of elements currently allocated for pubname_table. */
2312 static unsigned pubname_table_allocated;
2314 /* Number of elements in pubname_table currently in use. */
2315 static unsigned pubname_table_in_use;
2317 /* Size (in elements) of increments by which we may expand the
2319 #define PUBNAME_TABLE_INCREMENT 64
2321 /* A pointer to the base of a table that contains a list of publicly
2322 accessible names. */
2323 static arange_ref arange_table;
2325 /* Number of elements currently allocated for arange_table. */
2326 static unsigned arange_table_allocated;
2328 /* Number of elements in arange_table currently in use. */
2329 static unsigned arange_table_in_use;
2331 /* Size (in elements) of increments by which we may expand the
2333 #define ARANGE_TABLE_INCREMENT 64
2335 /* A pointer to the base of a list of pending types which we haven't
2336 generated DIEs for yet, but which we will have to come back to
2339 static tree *pending_types_list;
2341 /* Number of elements currently allocated for the pending_types_list. */
2342 static unsigned pending_types_allocated;
2344 /* Number of elements of pending_types_list currently in use. */
2345 static unsigned pending_types;
2347 /* Size (in elements) of increments by which we may expand the pending
2348 types list. Actually, a single hunk of space of this size should
2349 be enough for most typical programs. */
2350 #define PENDING_TYPES_INCREMENT 64
2352 /* Record whether the function being analyzed contains inlined functions. */
2353 static int current_function_has_inlines;
2354 #if 0 && defined (MIPS_DEBUGGING_INFO)
2355 static int comp_unit_has_inlines;
2358 /* A pointer to the ..._DECL node which we have most recently been working
2359 on. We keep this around just in case something about it looks screwy and
2360 we want to tell the user what the source coordinates for the actual
2362 static tree dwarf_last_decl;
2364 /* Forward declarations for functions defined in this file. */
2366 static void addr_const_to_string PROTO((char *, rtx));
2367 static char *addr_to_string PROTO((rtx));
2368 static int is_pseudo_reg PROTO((rtx));
2369 static tree type_main_variant PROTO((tree));
2370 static int is_tagged_type PROTO((tree));
2371 static char *dwarf_tag_name PROTO((unsigned));
2372 static char *dwarf_attr_name PROTO((unsigned));
2373 static char *dwarf_form_name PROTO((unsigned));
2374 static char *dwarf_stack_op_name PROTO((unsigned));
2375 static char *dwarf_type_encoding_name PROTO((unsigned));
2376 static tree decl_ultimate_origin PROTO((tree));
2377 static tree block_ultimate_origin PROTO((tree));
2378 static tree decl_class_context PROTO((tree));
2379 static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
2380 static void add_AT_flag PROTO((dw_die_ref,
2381 enum dwarf_attribute,
2383 static void add_AT_int PROTO((dw_die_ref,
2384 enum dwarf_attribute, long));
2385 static void add_AT_unsigned PROTO((dw_die_ref,
2386 enum dwarf_attribute,
2388 static void add_AT_long_long PROTO((dw_die_ref,
2389 enum dwarf_attribute,
2390 unsigned long, unsigned long));
2391 static void add_AT_float PROTO((dw_die_ref,
2392 enum dwarf_attribute,
2394 static void add_AT_string PROTO((dw_die_ref,
2395 enum dwarf_attribute, char *));
2396 static void add_AT_die_ref PROTO((dw_die_ref,
2397 enum dwarf_attribute,
2399 static void add_AT_fde_ref PROTO((dw_die_ref,
2400 enum dwarf_attribute,
2402 static void add_AT_loc PROTO((dw_die_ref,
2403 enum dwarf_attribute,
2405 static void add_AT_addr PROTO((dw_die_ref,
2406 enum dwarf_attribute, char *));
2407 static void add_AT_lbl_id PROTO((dw_die_ref,
2408 enum dwarf_attribute, char *));
2409 static void add_AT_section_offset PROTO((dw_die_ref,
2410 enum dwarf_attribute, char *));
2411 static int is_extern_subr_die PROTO((dw_die_ref));
2412 static dw_attr_ref get_AT PROTO((dw_die_ref,
2413 enum dwarf_attribute));
2414 static char *get_AT_low_pc PROTO((dw_die_ref));
2415 static char *get_AT_hi_pc PROTO((dw_die_ref));
2416 static char *get_AT_string PROTO((dw_die_ref,
2417 enum dwarf_attribute));
2418 static int get_AT_flag PROTO((dw_die_ref,
2419 enum dwarf_attribute));
2420 static unsigned get_AT_unsigned PROTO((dw_die_ref,
2421 enum dwarf_attribute));
2422 static int is_c_family PROTO((void));
2423 static int is_fortran PROTO((void));
2424 static void remove_AT PROTO((dw_die_ref,
2425 enum dwarf_attribute));
2426 static void remove_children PROTO((dw_die_ref));
2427 static void add_child_die PROTO((dw_die_ref, dw_die_ref));
2428 static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
2429 static dw_die_ref lookup_type_die PROTO((tree));
2430 static void equate_type_number_to_die PROTO((tree, dw_die_ref));
2431 static dw_die_ref lookup_decl_die PROTO((tree));
2432 static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
2433 static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
2434 unsigned long, unsigned long));
2435 static void add_loc_descr PROTO((dw_loc_descr_ref *,
2437 static void print_spaces PROTO((FILE *));
2438 static void print_die PROTO((dw_die_ref, FILE *));
2439 static void print_dwarf_line_table PROTO((FILE *));
2440 static void add_sibling_attributes PROTO((dw_die_ref));
2441 static void build_abbrev_table PROTO((dw_die_ref));
2442 static unsigned long size_of_string PROTO((char *));
2443 static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
2444 static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
2445 static int constant_size PROTO((long unsigned));
2446 static unsigned long size_of_die PROTO((dw_die_ref));
2447 static void calc_die_sizes PROTO((dw_die_ref));
2448 static unsigned long size_of_line_prolog PROTO((void));
2449 static unsigned long size_of_line_info PROTO((void));
2450 static unsigned long size_of_pubnames PROTO((void));
2451 static unsigned long size_of_aranges PROTO((void));
2452 static enum dwarf_form value_format PROTO((dw_val_ref));
2453 static void output_value_format PROTO((dw_val_ref));
2454 static void output_abbrev_section PROTO((void));
2455 static void output_loc_operands PROTO((dw_loc_descr_ref));
2456 static unsigned long sibling_offset PROTO((dw_die_ref));
2457 static void output_die PROTO((dw_die_ref));
2458 static void output_compilation_unit_header PROTO((void));
2459 static char *dwarf2_name PROTO((tree, int));
2460 static void add_pubname PROTO((tree, dw_die_ref));
2461 static void output_pubnames PROTO((void));
2462 static void add_arange PROTO((tree, dw_die_ref));
2463 static void output_aranges PROTO((void));
2464 static void output_line_info PROTO((void));
2465 static int is_body_block PROTO((tree));
2466 static dw_die_ref base_type_die PROTO((tree));
2467 static tree root_type PROTO((tree));
2468 static int is_base_type PROTO((tree));
2469 static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
2470 static int type_is_enum PROTO((tree));
2471 static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
2472 static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
2473 static int is_based_loc PROTO((rtx));
2474 static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx));
2475 static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
2476 static dw_loc_descr_ref loc_descriptor PROTO((rtx));
2477 static unsigned ceiling PROTO((unsigned, unsigned));
2478 static tree field_type PROTO((tree));
2479 static unsigned simple_type_align_in_bits PROTO((tree));
2480 static unsigned simple_type_size_in_bits PROTO((tree));
2481 static unsigned field_byte_offset PROTO((tree));
2482 static void add_AT_location_description PROTO((dw_die_ref,
2483 enum dwarf_attribute, rtx));
2484 static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
2485 static void add_const_value_attribute PROTO((dw_die_ref, rtx));
2486 static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
2487 static void add_name_attribute PROTO((dw_die_ref, char *));
2488 static void add_bound_info PROTO((dw_die_ref,
2489 enum dwarf_attribute, tree));
2490 static void add_subscript_info PROTO((dw_die_ref, tree));
2491 static void add_byte_size_attribute PROTO((dw_die_ref, tree));
2492 static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
2493 static void add_bit_size_attribute PROTO((dw_die_ref, tree));
2494 static void add_prototyped_attribute PROTO((dw_die_ref, tree));
2495 static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
2496 static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
2497 static void add_src_coords_attributes PROTO((dw_die_ref, tree));
2498 static void add_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
2499 static void push_decl_scope PROTO((tree));
2500 static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
2501 static void pop_decl_scope PROTO((void));
2502 static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
2504 static char *type_tag PROTO((tree));
2505 static tree member_declared_type PROTO((tree));
2506 static char *decl_start_label PROTO((tree));
2507 static void gen_array_type_die PROTO((tree, dw_die_ref));
2508 static void gen_set_type_die PROTO((tree, dw_die_ref));
2509 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2510 static void pend_type PROTO((tree));
2511 static void output_pending_types_for_scope PROTO((dw_die_ref));
2512 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2513 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2514 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2515 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2516 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2517 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2518 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2519 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2520 static void gen_variable_die PROTO((tree, dw_die_ref));
2521 static void gen_label_die PROTO((tree, dw_die_ref));
2522 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2523 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2524 static void gen_field_die PROTO((tree, dw_die_ref));
2525 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2526 static void gen_compile_unit_die PROTO((char *));
2527 static void gen_string_type_die PROTO((tree, dw_die_ref));
2528 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2529 static void gen_member_die PROTO((tree, dw_die_ref));
2530 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2531 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2532 static void gen_typedef_die PROTO((tree, dw_die_ref));
2533 static void gen_type_die PROTO((tree, dw_die_ref));
2534 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2535 static void gen_block_die PROTO((tree, dw_die_ref, int));
2536 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2537 static int is_redundant_typedef PROTO((tree));
2538 static void gen_decl_die PROTO((tree, dw_die_ref));
2539 static unsigned lookup_filename PROTO((char *));
2541 /* Section names used to hold DWARF debugging information. */
2542 #ifndef DEBUG_INFO_SECTION
2543 #define DEBUG_INFO_SECTION ".debug_info"
2545 #ifndef ABBREV_SECTION
2546 #define ABBREV_SECTION ".debug_abbrev"
2548 #ifndef ARANGES_SECTION
2549 #define ARANGES_SECTION ".debug_aranges"
2551 #ifndef DW_MACINFO_SECTION
2552 #define DW_MACINFO_SECTION ".debug_macinfo"
2554 #ifndef DEBUG_LINE_SECTION
2555 #define DEBUG_LINE_SECTION ".debug_line"
2558 #define LOC_SECTION ".debug_loc"
2560 #ifndef PUBNAMES_SECTION
2561 #define PUBNAMES_SECTION ".debug_pubnames"
2564 #define STR_SECTION ".debug_str"
2567 /* Standard ELF section names for compiled code and data. */
2568 #ifndef TEXT_SECTION
2569 #define TEXT_SECTION ".text"
2571 #ifndef DATA_SECTION
2572 #define DATA_SECTION ".data"
2575 #define BSS_SECTION ".bss"
2579 /* Definitions of defaults for formats and names of various special
2580 (artificial) labels which may be generated within this file (when the -g
2581 options is used and DWARF_DEBUGGING_INFO is in effect.
2582 If necessary, these may be overridden from within the tm.h file, but
2583 typically, overriding these defaults is unnecessary. */
2585 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2587 #ifndef TEXT_END_LABEL
2588 #define TEXT_END_LABEL "Letext"
2590 #ifndef DATA_END_LABEL
2591 #define DATA_END_LABEL "Ledata"
2593 #ifndef BSS_END_LABEL
2594 #define BSS_END_LABEL "Lebss"
2596 #ifndef INSN_LABEL_FMT
2597 #define INSN_LABEL_FMT "LI%u_"
2599 #ifndef BLOCK_BEGIN_LABEL
2600 #define BLOCK_BEGIN_LABEL "LBB"
2602 #ifndef BLOCK_END_LABEL
2603 #define BLOCK_END_LABEL "LBE"
2605 #ifndef BODY_BEGIN_LABEL
2606 #define BODY_BEGIN_LABEL "Lbb"
2608 #ifndef BODY_END_LABEL
2609 #define BODY_END_LABEL "Lbe"
2611 #ifndef LINE_CODE_LABEL
2612 #define LINE_CODE_LABEL "LM"
2614 #ifndef SEPARATE_LINE_CODE_LABEL
2615 #define SEPARATE_LINE_CODE_LABEL "LSM"
2618 /* Convert a reference to the assembler name of a C-level name. This
2619 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2620 a string rather than writing to a file. */
2621 #ifndef ASM_NAME_TO_STRING
2622 #define ASM_NAME_TO_STRING(STR, NAME) \
2624 if ((NAME)[0] == '*') \
2625 strcpy (STR, NAME+1); \
2627 strcpy (STR, NAME); \
2632 /* Convert an integer constant expression into assembler syntax. Addition
2633 and subtraction are the only arithmetic that may appear in these
2634 expressions. This is an adaptation of output_addr_const in final.c.
2635 Here, the target of the conversion is a string buffer. We can't use
2636 output_addr_const directly, because it writes to a file. */
2639 addr_const_to_string (str, x)
2648 switch (GET_CODE (x))
2658 ASM_NAME_TO_STRING (buf1, XSTR (x, 0));
2663 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2664 ASM_NAME_TO_STRING (buf2, buf1);
2669 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2670 ASM_NAME_TO_STRING (buf2, buf1);
2675 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2680 /* This used to output parentheses around the expression, but that does
2681 not work on the 386 (either ATT or BSD assembler). */
2682 addr_const_to_string (buf1, XEXP (x, 0));
2687 if (GET_MODE (x) == VOIDmode)
2689 /* We can use %d if the number is one word and positive. */
2690 if (CONST_DOUBLE_HIGH (x))
2691 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2692 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2693 else if (CONST_DOUBLE_LOW (x) < 0)
2694 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2696 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2697 CONST_DOUBLE_LOW (x));
2701 /* We can't handle floating point constants; PRINT_OPERAND must
2703 output_operand_lossage ("floating constant misused");
2707 /* Some assemblers need integer constants to appear last (eg masm). */
2708 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2710 addr_const_to_string (buf1, XEXP (x, 1));
2712 if (INTVAL (XEXP (x, 0)) >= 0)
2715 addr_const_to_string (buf1, XEXP (x, 0));
2720 addr_const_to_string (buf1, XEXP (x, 0));
2722 if (INTVAL (XEXP (x, 1)) >= 0)
2725 addr_const_to_string (buf1, XEXP (x, 1));
2731 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2732 can't handle that. */
2733 x = simplify_subtraction (x);
2734 if (GET_CODE (x) != MINUS)
2737 addr_const_to_string (buf1, XEXP (x, 0));
2740 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2741 && INTVAL (XEXP (x, 1)) < 0)
2743 strcat (str, ASM_OPEN_PAREN);
2744 addr_const_to_string (buf1, XEXP (x, 1));
2746 strcat (str, ASM_CLOSE_PAREN);
2750 addr_const_to_string (buf1, XEXP (x, 1));
2757 addr_const_to_string (buf1, XEXP (x, 0));
2762 output_operand_lossage ("invalid expression as operand");
2766 /* Convert an address constant to a string, and return a pointer to
2767 a copy of the result, located on the heap. */
2774 addr_const_to_string (buf, x);
2775 return xstrdup (buf);
2778 /* Test if rtl node points to a pseudo register. */
2784 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2785 || ((GET_CODE (rtl) == SUBREG)
2786 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2789 /* Return a reference to a type, with its const and volatile qualifiers
2793 type_main_variant (type)
2796 type = TYPE_MAIN_VARIANT (type);
2798 /* There really should be only one main variant among any group of variants
2799 of a given type (and all of the MAIN_VARIANT values for all members of
2800 the group should point to that one type) but sometimes the C front-end
2801 messes this up for array types, so we work around that bug here. */
2803 if (TREE_CODE (type) == ARRAY_TYPE)
2804 while (type != TYPE_MAIN_VARIANT (type))
2805 type = TYPE_MAIN_VARIANT (type);
2810 /* Return non-zero if the given type node represents a tagged type. */
2813 is_tagged_type (type)
2816 register enum tree_code code = TREE_CODE (type);
2818 return (code == RECORD_TYPE || code == UNION_TYPE
2819 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2822 /* Convert a DIE tag into its string name. */
2825 dwarf_tag_name (tag)
2826 register unsigned tag;
2830 case DW_TAG_padding:
2831 return "DW_TAG_padding";
2832 case DW_TAG_array_type:
2833 return "DW_TAG_array_type";
2834 case DW_TAG_class_type:
2835 return "DW_TAG_class_type";
2836 case DW_TAG_entry_point:
2837 return "DW_TAG_entry_point";
2838 case DW_TAG_enumeration_type:
2839 return "DW_TAG_enumeration_type";
2840 case DW_TAG_formal_parameter:
2841 return "DW_TAG_formal_parameter";
2842 case DW_TAG_imported_declaration:
2843 return "DW_TAG_imported_declaration";
2845 return "DW_TAG_label";
2846 case DW_TAG_lexical_block:
2847 return "DW_TAG_lexical_block";
2849 return "DW_TAG_member";
2850 case DW_TAG_pointer_type:
2851 return "DW_TAG_pointer_type";
2852 case DW_TAG_reference_type:
2853 return "DW_TAG_reference_type";
2854 case DW_TAG_compile_unit:
2855 return "DW_TAG_compile_unit";
2856 case DW_TAG_string_type:
2857 return "DW_TAG_string_type";
2858 case DW_TAG_structure_type:
2859 return "DW_TAG_structure_type";
2860 case DW_TAG_subroutine_type:
2861 return "DW_TAG_subroutine_type";
2862 case DW_TAG_typedef:
2863 return "DW_TAG_typedef";
2864 case DW_TAG_union_type:
2865 return "DW_TAG_union_type";
2866 case DW_TAG_unspecified_parameters:
2867 return "DW_TAG_unspecified_parameters";
2868 case DW_TAG_variant:
2869 return "DW_TAG_variant";
2870 case DW_TAG_common_block:
2871 return "DW_TAG_common_block";
2872 case DW_TAG_common_inclusion:
2873 return "DW_TAG_common_inclusion";
2874 case DW_TAG_inheritance:
2875 return "DW_TAG_inheritance";
2876 case DW_TAG_inlined_subroutine:
2877 return "DW_TAG_inlined_subroutine";
2879 return "DW_TAG_module";
2880 case DW_TAG_ptr_to_member_type:
2881 return "DW_TAG_ptr_to_member_type";
2882 case DW_TAG_set_type:
2883 return "DW_TAG_set_type";
2884 case DW_TAG_subrange_type:
2885 return "DW_TAG_subrange_type";
2886 case DW_TAG_with_stmt:
2887 return "DW_TAG_with_stmt";
2888 case DW_TAG_access_declaration:
2889 return "DW_TAG_access_declaration";
2890 case DW_TAG_base_type:
2891 return "DW_TAG_base_type";
2892 case DW_TAG_catch_block:
2893 return "DW_TAG_catch_block";
2894 case DW_TAG_const_type:
2895 return "DW_TAG_const_type";
2896 case DW_TAG_constant:
2897 return "DW_TAG_constant";
2898 case DW_TAG_enumerator:
2899 return "DW_TAG_enumerator";
2900 case DW_TAG_file_type:
2901 return "DW_TAG_file_type";
2903 return "DW_TAG_friend";
2904 case DW_TAG_namelist:
2905 return "DW_TAG_namelist";
2906 case DW_TAG_namelist_item:
2907 return "DW_TAG_namelist_item";
2908 case DW_TAG_packed_type:
2909 return "DW_TAG_packed_type";
2910 case DW_TAG_subprogram:
2911 return "DW_TAG_subprogram";
2912 case DW_TAG_template_type_param:
2913 return "DW_TAG_template_type_param";
2914 case DW_TAG_template_value_param:
2915 return "DW_TAG_template_value_param";
2916 case DW_TAG_thrown_type:
2917 return "DW_TAG_thrown_type";
2918 case DW_TAG_try_block:
2919 return "DW_TAG_try_block";
2920 case DW_TAG_variant_part:
2921 return "DW_TAG_variant_part";
2922 case DW_TAG_variable:
2923 return "DW_TAG_variable";
2924 case DW_TAG_volatile_type:
2925 return "DW_TAG_volatile_type";
2926 case DW_TAG_MIPS_loop:
2927 return "DW_TAG_MIPS_loop";
2928 case DW_TAG_format_label:
2929 return "DW_TAG_format_label";
2930 case DW_TAG_function_template:
2931 return "DW_TAG_function_template";
2932 case DW_TAG_class_template:
2933 return "DW_TAG_class_template";
2935 return "DW_TAG_<unknown>";
2939 /* Convert a DWARF attribute code into its string name. */
2942 dwarf_attr_name (attr)
2943 register unsigned attr;
2948 return "DW_AT_sibling";
2949 case DW_AT_location:
2950 return "DW_AT_location";
2952 return "DW_AT_name";
2953 case DW_AT_ordering:
2954 return "DW_AT_ordering";
2955 case DW_AT_subscr_data:
2956 return "DW_AT_subscr_data";
2957 case DW_AT_byte_size:
2958 return "DW_AT_byte_size";
2959 case DW_AT_bit_offset:
2960 return "DW_AT_bit_offset";
2961 case DW_AT_bit_size:
2962 return "DW_AT_bit_size";
2963 case DW_AT_element_list:
2964 return "DW_AT_element_list";
2965 case DW_AT_stmt_list:
2966 return "DW_AT_stmt_list";
2968 return "DW_AT_low_pc";
2970 return "DW_AT_high_pc";
2971 case DW_AT_language:
2972 return "DW_AT_language";
2974 return "DW_AT_member";
2976 return "DW_AT_discr";
2977 case DW_AT_discr_value:
2978 return "DW_AT_discr_value";
2979 case DW_AT_visibility:
2980 return "DW_AT_visibility";
2982 return "DW_AT_import";
2983 case DW_AT_string_length:
2984 return "DW_AT_string_length";
2985 case DW_AT_common_reference:
2986 return "DW_AT_common_reference";
2987 case DW_AT_comp_dir:
2988 return "DW_AT_comp_dir";
2989 case DW_AT_const_value:
2990 return "DW_AT_const_value";
2991 case DW_AT_containing_type:
2992 return "DW_AT_containing_type";
2993 case DW_AT_default_value:
2994 return "DW_AT_default_value";
2996 return "DW_AT_inline";
2997 case DW_AT_is_optional:
2998 return "DW_AT_is_optional";
2999 case DW_AT_lower_bound:
3000 return "DW_AT_lower_bound";
3001 case DW_AT_producer:
3002 return "DW_AT_producer";
3003 case DW_AT_prototyped:
3004 return "DW_AT_prototyped";
3005 case DW_AT_return_addr:
3006 return "DW_AT_return_addr";
3007 case DW_AT_start_scope:
3008 return "DW_AT_start_scope";
3009 case DW_AT_stride_size:
3010 return "DW_AT_stride_size";
3011 case DW_AT_upper_bound:
3012 return "DW_AT_upper_bound";
3013 case DW_AT_abstract_origin:
3014 return "DW_AT_abstract_origin";
3015 case DW_AT_accessibility:
3016 return "DW_AT_accessibility";
3017 case DW_AT_address_class:
3018 return "DW_AT_address_class";
3019 case DW_AT_artificial:
3020 return "DW_AT_artificial";
3021 case DW_AT_base_types:
3022 return "DW_AT_base_types";
3023 case DW_AT_calling_convention:
3024 return "DW_AT_calling_convention";
3026 return "DW_AT_count";
3027 case DW_AT_data_member_location:
3028 return "DW_AT_data_member_location";
3029 case DW_AT_decl_column:
3030 return "DW_AT_decl_column";
3031 case DW_AT_decl_file:
3032 return "DW_AT_decl_file";
3033 case DW_AT_decl_line:
3034 return "DW_AT_decl_line";
3035 case DW_AT_declaration:
3036 return "DW_AT_declaration";
3037 case DW_AT_discr_list:
3038 return "DW_AT_discr_list";
3039 case DW_AT_encoding:
3040 return "DW_AT_encoding";
3041 case DW_AT_external:
3042 return "DW_AT_external";
3043 case DW_AT_frame_base:
3044 return "DW_AT_frame_base";
3046 return "DW_AT_friend";
3047 case DW_AT_identifier_case:
3048 return "DW_AT_identifier_case";
3049 case DW_AT_macro_info:
3050 return "DW_AT_macro_info";
3051 case DW_AT_namelist_items:
3052 return "DW_AT_namelist_items";
3053 case DW_AT_priority:
3054 return "DW_AT_priority";
3056 return "DW_AT_segment";
3057 case DW_AT_specification:
3058 return "DW_AT_specification";
3059 case DW_AT_static_link:
3060 return "DW_AT_static_link";
3062 return "DW_AT_type";
3063 case DW_AT_use_location:
3064 return "DW_AT_use_location";
3065 case DW_AT_variable_parameter:
3066 return "DW_AT_variable_parameter";
3067 case DW_AT_virtuality:
3068 return "DW_AT_virtuality";
3069 case DW_AT_vtable_elem_location:
3070 return "DW_AT_vtable_elem_location";
3072 case DW_AT_MIPS_fde:
3073 return "DW_AT_MIPS_fde";
3074 case DW_AT_MIPS_loop_begin:
3075 return "DW_AT_MIPS_loop_begin";
3076 case DW_AT_MIPS_tail_loop_begin:
3077 return "DW_AT_MIPS_tail_loop_begin";
3078 case DW_AT_MIPS_epilog_begin:
3079 return "DW_AT_MIPS_epilog_begin";
3080 case DW_AT_MIPS_loop_unroll_factor:
3081 return "DW_AT_MIPS_loop_unroll_factor";
3082 case DW_AT_MIPS_software_pipeline_depth:
3083 return "DW_AT_MIPS_software_pipeline_depth";
3084 case DW_AT_MIPS_linkage_name:
3085 return "DW_AT_MIPS_linkage_name";
3086 case DW_AT_MIPS_stride:
3087 return "DW_AT_MIPS_stride";
3088 case DW_AT_MIPS_abstract_name:
3089 return "DW_AT_MIPS_abstract_name";
3090 case DW_AT_MIPS_clone_origin:
3091 return "DW_AT_MIPS_clone_origin";
3092 case DW_AT_MIPS_has_inlines:
3093 return "DW_AT_MIPS_has_inlines";
3095 case DW_AT_sf_names:
3096 return "DW_AT_sf_names";
3097 case DW_AT_src_info:
3098 return "DW_AT_src_info";
3099 case DW_AT_mac_info:
3100 return "DW_AT_mac_info";
3101 case DW_AT_src_coords:
3102 return "DW_AT_src_coords";
3103 case DW_AT_body_begin:
3104 return "DW_AT_body_begin";
3105 case DW_AT_body_end:
3106 return "DW_AT_body_end";
3108 return "DW_AT_<unknown>";
3112 /* Convert a DWARF value form code into its string name. */
3115 dwarf_form_name (form)
3116 register unsigned form;
3121 return "DW_FORM_addr";
3122 case DW_FORM_block2:
3123 return "DW_FORM_block2";
3124 case DW_FORM_block4:
3125 return "DW_FORM_block4";
3127 return "DW_FORM_data2";
3129 return "DW_FORM_data4";
3131 return "DW_FORM_data8";
3132 case DW_FORM_string:
3133 return "DW_FORM_string";
3135 return "DW_FORM_block";
3136 case DW_FORM_block1:
3137 return "DW_FORM_block1";
3139 return "DW_FORM_data1";
3141 return "DW_FORM_flag";
3143 return "DW_FORM_sdata";
3145 return "DW_FORM_strp";
3147 return "DW_FORM_udata";
3148 case DW_FORM_ref_addr:
3149 return "DW_FORM_ref_addr";
3151 return "DW_FORM_ref1";
3153 return "DW_FORM_ref2";
3155 return "DW_FORM_ref4";
3157 return "DW_FORM_ref8";
3158 case DW_FORM_ref_udata:
3159 return "DW_FORM_ref_udata";
3160 case DW_FORM_indirect:
3161 return "DW_FORM_indirect";
3163 return "DW_FORM_<unknown>";
3167 /* Convert a DWARF stack opcode into its string name. */
3170 dwarf_stack_op_name (op)
3171 register unsigned op;
3176 return "DW_OP_addr";
3178 return "DW_OP_deref";
3180 return "DW_OP_const1u";
3182 return "DW_OP_const1s";
3184 return "DW_OP_const2u";
3186 return "DW_OP_const2s";
3188 return "DW_OP_const4u";
3190 return "DW_OP_const4s";
3192 return "DW_OP_const8u";
3194 return "DW_OP_const8s";
3196 return "DW_OP_constu";
3198 return "DW_OP_consts";
3202 return "DW_OP_drop";
3204 return "DW_OP_over";
3206 return "DW_OP_pick";
3208 return "DW_OP_swap";
3212 return "DW_OP_xderef";
3220 return "DW_OP_minus";
3232 return "DW_OP_plus";
3233 case DW_OP_plus_uconst:
3234 return "DW_OP_plus_uconst";
3240 return "DW_OP_shra";
3258 return "DW_OP_skip";
3260 return "DW_OP_lit0";
3262 return "DW_OP_lit1";
3264 return "DW_OP_lit2";
3266 return "DW_OP_lit3";
3268 return "DW_OP_lit4";
3270 return "DW_OP_lit5";
3272 return "DW_OP_lit6";
3274 return "DW_OP_lit7";
3276 return "DW_OP_lit8";
3278 return "DW_OP_lit9";
3280 return "DW_OP_lit10";
3282 return "DW_OP_lit11";
3284 return "DW_OP_lit12";
3286 return "DW_OP_lit13";
3288 return "DW_OP_lit14";
3290 return "DW_OP_lit15";
3292 return "DW_OP_lit16";
3294 return "DW_OP_lit17";
3296 return "DW_OP_lit18";
3298 return "DW_OP_lit19";
3300 return "DW_OP_lit20";
3302 return "DW_OP_lit21";
3304 return "DW_OP_lit22";
3306 return "DW_OP_lit23";
3308 return "DW_OP_lit24";
3310 return "DW_OP_lit25";
3312 return "DW_OP_lit26";
3314 return "DW_OP_lit27";
3316 return "DW_OP_lit28";
3318 return "DW_OP_lit29";
3320 return "DW_OP_lit30";
3322 return "DW_OP_lit31";
3324 return "DW_OP_reg0";
3326 return "DW_OP_reg1";
3328 return "DW_OP_reg2";
3330 return "DW_OP_reg3";
3332 return "DW_OP_reg4";
3334 return "DW_OP_reg5";
3336 return "DW_OP_reg6";
3338 return "DW_OP_reg7";
3340 return "DW_OP_reg8";
3342 return "DW_OP_reg9";
3344 return "DW_OP_reg10";
3346 return "DW_OP_reg11";
3348 return "DW_OP_reg12";
3350 return "DW_OP_reg13";
3352 return "DW_OP_reg14";
3354 return "DW_OP_reg15";
3356 return "DW_OP_reg16";
3358 return "DW_OP_reg17";
3360 return "DW_OP_reg18";
3362 return "DW_OP_reg19";
3364 return "DW_OP_reg20";
3366 return "DW_OP_reg21";
3368 return "DW_OP_reg22";
3370 return "DW_OP_reg23";
3372 return "DW_OP_reg24";
3374 return "DW_OP_reg25";
3376 return "DW_OP_reg26";
3378 return "DW_OP_reg27";
3380 return "DW_OP_reg28";
3382 return "DW_OP_reg29";
3384 return "DW_OP_reg30";
3386 return "DW_OP_reg31";
3388 return "DW_OP_breg0";
3390 return "DW_OP_breg1";
3392 return "DW_OP_breg2";
3394 return "DW_OP_breg3";
3396 return "DW_OP_breg4";
3398 return "DW_OP_breg5";
3400 return "DW_OP_breg6";
3402 return "DW_OP_breg7";
3404 return "DW_OP_breg8";
3406 return "DW_OP_breg9";
3408 return "DW_OP_breg10";
3410 return "DW_OP_breg11";
3412 return "DW_OP_breg12";
3414 return "DW_OP_breg13";
3416 return "DW_OP_breg14";
3418 return "DW_OP_breg15";
3420 return "DW_OP_breg16";
3422 return "DW_OP_breg17";
3424 return "DW_OP_breg18";
3426 return "DW_OP_breg19";
3428 return "DW_OP_breg20";
3430 return "DW_OP_breg21";
3432 return "DW_OP_breg22";
3434 return "DW_OP_breg23";
3436 return "DW_OP_breg24";
3438 return "DW_OP_breg25";
3440 return "DW_OP_breg26";
3442 return "DW_OP_breg27";
3444 return "DW_OP_breg28";
3446 return "DW_OP_breg29";
3448 return "DW_OP_breg30";
3450 return "DW_OP_breg31";
3452 return "DW_OP_regx";
3454 return "DW_OP_fbreg";
3456 return "DW_OP_bregx";
3458 return "DW_OP_piece";
3459 case DW_OP_deref_size:
3460 return "DW_OP_deref_size";
3461 case DW_OP_xderef_size:
3462 return "DW_OP_xderef_size";
3466 return "OP_<unknown>";
3470 /* Convert a DWARF type code into its string name. */
3473 dwarf_type_encoding_name (enc)
3474 register unsigned enc;
3478 case DW_ATE_address:
3479 return "DW_ATE_address";
3480 case DW_ATE_boolean:
3481 return "DW_ATE_boolean";
3482 case DW_ATE_complex_float:
3483 return "DW_ATE_complex_float";
3485 return "DW_ATE_float";
3487 return "DW_ATE_signed";
3488 case DW_ATE_signed_char:
3489 return "DW_ATE_signed_char";
3490 case DW_ATE_unsigned:
3491 return "DW_ATE_unsigned";
3492 case DW_ATE_unsigned_char:
3493 return "DW_ATE_unsigned_char";
3495 return "DW_ATE_<unknown>";
3499 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3500 instance of an inlined instance of a decl which is local to an inline
3501 function, so we have to trace all of the way back through the origin chain
3502 to find out what sort of node actually served as the original seed for the
3506 decl_ultimate_origin (decl)
3509 register tree immediate_origin = DECL_ABSTRACT_ORIGIN (decl);
3511 if (immediate_origin == NULL_TREE)
3515 register tree ret_val;
3516 register tree lookahead = immediate_origin;
3520 ret_val = lookahead;
3521 lookahead = DECL_ABSTRACT_ORIGIN (ret_val);
3523 while (lookahead != NULL && lookahead != ret_val);
3529 /* Determine the "ultimate origin" of a block. The block may be an inlined
3530 instance of an inlined instance of a block which is local to an inline
3531 function, so we have to trace all of the way back through the origin chain
3532 to find out what sort of node actually served as the original seed for the
3536 block_ultimate_origin (block)
3537 register tree block;
3539 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3541 if (immediate_origin == NULL_TREE)
3545 register tree ret_val;
3546 register tree lookahead = immediate_origin;
3550 ret_val = lookahead;
3551 lookahead = (TREE_CODE (ret_val) == BLOCK)
3552 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3555 while (lookahead != NULL && lookahead != ret_val);
3561 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3562 of a virtual function may refer to a base class, so we check the 'this'
3566 decl_class_context (decl)
3569 tree context = NULL_TREE;
3571 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3572 context = DECL_CONTEXT (decl);
3574 context = TYPE_MAIN_VARIANT
3575 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3577 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3578 context = NULL_TREE;
3583 /* Add an attribute/value pair to a DIE */
3586 add_dwarf_attr (die, attr)
3587 register dw_die_ref die;
3588 register dw_attr_ref attr;
3590 if (die != NULL && attr != NULL)
3592 if (die->die_attr == NULL)
3594 die->die_attr = attr;
3595 die->die_attr_last = attr;
3599 die->die_attr_last->dw_attr_next = attr;
3600 die->die_attr_last = attr;
3605 /* Add a flag value attribute to a DIE. */
3608 add_AT_flag (die, attr_kind, flag)
3609 register dw_die_ref die;
3610 register enum dwarf_attribute attr_kind;
3611 register unsigned flag;
3613 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3615 attr->dw_attr_next = NULL;
3616 attr->dw_attr = attr_kind;
3617 attr->dw_attr_val.val_class = dw_val_class_flag;
3618 attr->dw_attr_val.v.val_flag = flag;
3619 add_dwarf_attr (die, attr);
3622 /* Add a signed integer attribute value to a DIE. */
3625 add_AT_int (die, attr_kind, int_val)
3626 register dw_die_ref die;
3627 register enum dwarf_attribute attr_kind;
3628 register long int int_val;
3630 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3632 attr->dw_attr_next = NULL;
3633 attr->dw_attr = attr_kind;
3634 attr->dw_attr_val.val_class = dw_val_class_const;
3635 attr->dw_attr_val.v.val_int = int_val;
3636 add_dwarf_attr (die, attr);
3639 /* Add an unsigned integer attribute value to a DIE. */
3642 add_AT_unsigned (die, attr_kind, unsigned_val)
3643 register dw_die_ref die;
3644 register enum dwarf_attribute attr_kind;
3645 register unsigned long unsigned_val;
3647 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3649 attr->dw_attr_next = NULL;
3650 attr->dw_attr = attr_kind;
3651 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
3652 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3653 add_dwarf_attr (die, attr);
3656 /* Add an unsigned double integer attribute value to a DIE. */
3659 add_AT_long_long (die, attr_kind, val_hi, val_low)
3660 register dw_die_ref die;
3661 register enum dwarf_attribute attr_kind;
3662 register unsigned long val_hi;
3663 register unsigned long val_low;
3665 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3667 attr->dw_attr_next = NULL;
3668 attr->dw_attr = attr_kind;
3669 attr->dw_attr_val.val_class = dw_val_class_long_long;
3670 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3671 attr->dw_attr_val.v.val_long_long.low = val_low;
3672 add_dwarf_attr (die, attr);
3675 /* Add a floating point attribute value to a DIE and return it. */
3678 add_AT_float (die, attr_kind, length, array)
3679 register dw_die_ref die;
3680 register enum dwarf_attribute attr_kind;
3681 register unsigned length;
3682 register long *array;
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_float;
3689 attr->dw_attr_val.v.val_float.length = length;
3690 attr->dw_attr_val.v.val_float.array = array;
3691 add_dwarf_attr (die, attr);
3694 /* Add a string attribute value to a DIE. */
3697 add_AT_string (die, attr_kind, str)
3698 register dw_die_ref die;
3699 register enum dwarf_attribute attr_kind;
3702 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3704 attr->dw_attr_next = NULL;
3705 attr->dw_attr = attr_kind;
3706 attr->dw_attr_val.val_class = dw_val_class_str;
3707 attr->dw_attr_val.v.val_str = xstrdup (str);
3708 add_dwarf_attr (die, attr);
3711 /* Add a DIE reference attribute value to a DIE. */
3714 add_AT_die_ref (die, attr_kind, targ_die)
3715 register dw_die_ref die;
3716 register enum dwarf_attribute attr_kind;
3717 register dw_die_ref targ_die;
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_die_ref;
3724 attr->dw_attr_val.v.val_die_ref = targ_die;
3725 add_dwarf_attr (die, attr);
3728 /* Add an FDE reference attribute value to a DIE. */
3731 add_AT_fde_ref (die, attr_kind, targ_fde)
3732 register dw_die_ref die;
3733 register enum dwarf_attribute attr_kind;
3734 register unsigned targ_fde;
3736 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3738 attr->dw_attr_next = NULL;
3739 attr->dw_attr = attr_kind;
3740 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
3741 attr->dw_attr_val.v.val_fde_index = targ_fde;
3742 add_dwarf_attr (die, attr);
3745 /* Add a location description attribute value to a DIE. */
3748 add_AT_loc (die, attr_kind, loc)
3749 register dw_die_ref die;
3750 register enum dwarf_attribute attr_kind;
3751 register dw_loc_descr_ref loc;
3753 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3755 attr->dw_attr_next = NULL;
3756 attr->dw_attr = attr_kind;
3757 attr->dw_attr_val.val_class = dw_val_class_loc;
3758 attr->dw_attr_val.v.val_loc = loc;
3759 add_dwarf_attr (die, attr);
3762 /* Add an address constant attribute value to a DIE. */
3765 add_AT_addr (die, attr_kind, addr)
3766 register dw_die_ref die;
3767 register enum dwarf_attribute attr_kind;
3770 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3772 attr->dw_attr_next = NULL;
3773 attr->dw_attr = attr_kind;
3774 attr->dw_attr_val.val_class = dw_val_class_addr;
3775 attr->dw_attr_val.v.val_addr = addr;
3776 add_dwarf_attr (die, attr);
3779 /* Add a label identifier attribute value to a DIE. */
3782 add_AT_lbl_id (die, attr_kind, lbl_id)
3783 register dw_die_ref die;
3784 register enum dwarf_attribute attr_kind;
3785 register char *lbl_id;
3787 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3789 attr->dw_attr_next = NULL;
3790 attr->dw_attr = attr_kind;
3791 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3792 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3793 add_dwarf_attr (die, attr);
3796 /* Add a section offset attribute value to a DIE. */
3799 add_AT_section_offset (die, attr_kind, section)
3800 register dw_die_ref die;
3801 register enum dwarf_attribute attr_kind;
3802 register char *section;
3804 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3806 attr->dw_attr_next = NULL;
3807 attr->dw_attr = attr_kind;
3808 attr->dw_attr_val.val_class = dw_val_class_section_offset;
3809 attr->dw_attr_val.v.val_section = section;
3810 add_dwarf_attr (die, attr);
3814 /* Test if die refers to an external subroutine. */
3817 is_extern_subr_die (die)
3818 register dw_die_ref die;
3820 register dw_attr_ref a;
3821 register int is_subr = FALSE;
3822 register int is_extern = FALSE;
3824 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3827 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3829 if (a->dw_attr == DW_AT_external
3830 && a->dw_attr_val.val_class == dw_val_class_flag
3831 && a->dw_attr_val.v.val_flag != 0)
3839 return is_subr && is_extern;
3842 /* Get the attribute of type attr_kind. */
3844 static inline dw_attr_ref
3845 get_AT (die, attr_kind)
3846 register dw_die_ref die;
3847 register enum dwarf_attribute attr_kind;
3849 register dw_attr_ref a;
3850 register dw_die_ref spec = NULL;
3854 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3856 if (a->dw_attr == attr_kind)
3859 if (a->dw_attr == DW_AT_specification
3860 || a->dw_attr == DW_AT_abstract_origin)
3861 spec = a->dw_attr_val.v.val_die_ref;
3865 return get_AT (spec, attr_kind);
3871 /* Return the "low pc" attribute value, typically associated with
3872 a subprogram DIE. Return null if the "low pc" attribute is
3873 either not prsent, or if it cannot be represented as an
3874 assembler label identifier. */
3876 static inline char *
3878 register dw_die_ref die;
3880 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3882 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3883 return a->dw_attr_val.v.val_lbl_id;
3888 /* Return the "high pc" attribute value, typically associated with
3889 a subprogram DIE. Return null if the "high pc" attribute is
3890 either not prsent, or if it cannot be represented as an
3891 assembler label identifier. */
3893 static inline char *
3895 register dw_die_ref die;
3897 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
3899 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3900 return a->dw_attr_val.v.val_lbl_id;
3905 /* Return the value of the string attribute designated by ATTR_KIND, or
3906 NULL if it is not present. */
3908 static inline char *
3909 get_AT_string (die, attr_kind)
3910 register dw_die_ref die;
3911 register enum dwarf_attribute attr_kind;
3913 register dw_attr_ref a = get_AT (die, attr_kind);
3915 if (a && a->dw_attr_val.val_class == dw_val_class_str)
3916 return a->dw_attr_val.v.val_str;
3921 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3922 if it is not present. */
3925 get_AT_flag (die, attr_kind)
3926 register dw_die_ref die;
3927 register enum dwarf_attribute attr_kind;
3929 register dw_attr_ref a = get_AT (die, attr_kind);
3931 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
3932 return a->dw_attr_val.v.val_flag;
3937 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3938 if it is not present. */
3940 static inline unsigned
3941 get_AT_unsigned (die, attr_kind)
3942 register dw_die_ref die;
3943 register enum dwarf_attribute attr_kind;
3945 register dw_attr_ref a = get_AT (die, attr_kind);
3947 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
3948 return a->dw_attr_val.v.val_unsigned;
3956 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3958 return (lang == DW_LANG_C || lang == DW_LANG_C89
3959 || lang == DW_LANG_C_plus_plus);
3965 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3967 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
3970 /* Remove the specified attribute if present. */
3973 remove_AT (die, attr_kind)
3974 register dw_die_ref die;
3975 register enum dwarf_attribute attr_kind;
3977 register dw_attr_ref a;
3978 register dw_attr_ref removed = NULL;;
3982 if (die->die_attr->dw_attr == attr_kind)
3984 removed = die->die_attr;
3985 if (die->die_attr_last == die->die_attr)
3986 die->die_attr_last = NULL;
3988 die->die_attr = die->die_attr->dw_attr_next;
3992 for (a = die->die_attr; a->dw_attr_next != NULL;
3993 a = a->dw_attr_next)
3994 if (a->dw_attr_next->dw_attr == attr_kind)
3996 removed = a->dw_attr_next;
3997 if (die->die_attr_last == a->dw_attr_next)
3998 die->die_attr_last = a;
4000 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4009 /* Discard the children of this DIE. */
4012 remove_children (die)
4013 register dw_die_ref die;
4015 register dw_die_ref child_die = die->die_child;
4017 die->die_child = NULL;
4018 die->die_child_last = NULL;
4020 while (child_die != NULL)
4022 register dw_die_ref tmp_die = child_die;
4023 register dw_attr_ref a;
4025 child_die = child_die->die_sib;
4027 for (a = tmp_die->die_attr; a != NULL; )
4029 register dw_attr_ref tmp_a = a;
4031 a = a->dw_attr_next;
4039 /* Add a child DIE below its parent. */
4042 add_child_die (die, child_die)
4043 register dw_die_ref die;
4044 register dw_die_ref child_die;
4046 if (die != NULL && child_die != NULL)
4048 if (die == child_die)
4050 child_die->die_parent = die;
4051 child_die->die_sib = NULL;
4053 if (die->die_child == NULL)
4055 die->die_child = child_die;
4056 die->die_child_last = child_die;
4060 die->die_child_last->die_sib = child_die;
4061 die->die_child_last = child_die;
4066 /* Return a pointer to a newly created DIE node. */
4068 static inline dw_die_ref
4069 new_die (tag_value, parent_die)
4070 register enum dwarf_tag tag_value;
4071 register dw_die_ref parent_die;
4073 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4075 die->die_tag = tag_value;
4076 die->die_abbrev = 0;
4077 die->die_offset = 0;
4078 die->die_child = NULL;
4079 die->die_parent = NULL;
4080 die->die_sib = NULL;
4081 die->die_child_last = NULL;
4082 die->die_attr = NULL;
4083 die->die_attr_last = NULL;
4085 if (parent_die != NULL)
4086 add_child_die (parent_die, die);
4089 limbo_die_node *limbo_node;
4091 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4092 limbo_node->die = die;
4093 limbo_node->next = limbo_die_list;
4094 limbo_die_list = limbo_node;
4100 /* Return the DIE associated with the given type specifier. */
4102 static inline dw_die_ref
4103 lookup_type_die (type)
4106 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4109 /* Equate a DIE to a given type specifier. */
4112 equate_type_number_to_die (type, type_die)
4114 register dw_die_ref type_die;
4116 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4119 /* Return the DIE associated with a given declaration. */
4121 static inline dw_die_ref
4122 lookup_decl_die (decl)
4125 register unsigned decl_id = DECL_UID (decl);
4127 return (decl_id < decl_die_table_in_use
4128 ? decl_die_table[decl_id] : NULL);
4131 /* Equate a DIE to a particular declaration. */
4134 equate_decl_number_to_die (decl, decl_die)
4136 register dw_die_ref decl_die;
4138 register unsigned decl_id = DECL_UID (decl);
4139 register unsigned num_allocated;
4141 if (decl_id >= decl_die_table_allocated)
4144 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4145 / DECL_DIE_TABLE_INCREMENT)
4146 * DECL_DIE_TABLE_INCREMENT;
4149 = (dw_die_ref *) xrealloc (decl_die_table,
4150 sizeof (dw_die_ref) * num_allocated);
4152 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4153 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4154 decl_die_table_allocated = num_allocated;
4157 if (decl_id >= decl_die_table_in_use)
4158 decl_die_table_in_use = (decl_id + 1);
4160 decl_die_table[decl_id] = decl_die;
4163 /* Return a pointer to a newly allocated location description. Location
4164 descriptions are simple expression terms that can be strung
4165 together to form more complicated location (address) descriptions. */
4167 static inline dw_loc_descr_ref
4168 new_loc_descr (op, oprnd1, oprnd2)
4169 register enum dwarf_location_atom op;
4170 register unsigned long oprnd1;
4171 register unsigned long oprnd2;
4173 register dw_loc_descr_ref descr
4174 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4176 descr->dw_loc_next = NULL;
4177 descr->dw_loc_opc = op;
4178 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4179 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4180 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4181 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4186 /* Add a location description term to a location description expression. */
4189 add_loc_descr (list_head, descr)
4190 register dw_loc_descr_ref *list_head;
4191 register dw_loc_descr_ref descr;
4193 register dw_loc_descr_ref *d;
4195 /* Find the end of the chain. */
4196 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4202 /* Keep track of the number of spaces used to indent the
4203 output of the debugging routines that print the structure of
4204 the DIE internal representation. */
4205 static int print_indent;
4207 /* Indent the line the number of spaces given by print_indent. */
4210 print_spaces (outfile)
4213 fprintf (outfile, "%*s", print_indent, "");
4216 /* Print the information associated with a given DIE, and its children.
4217 This routine is a debugging aid only. */
4220 print_die (die, outfile)
4224 register dw_attr_ref a;
4225 register dw_die_ref c;
4227 print_spaces (outfile);
4228 fprintf (outfile, "DIE %4lu: %s\n",
4229 die->die_offset, dwarf_tag_name (die->die_tag));
4230 print_spaces (outfile);
4231 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4232 fprintf (outfile, " offset: %lu\n", die->die_offset);
4234 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4236 print_spaces (outfile);
4237 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4239 switch (a->dw_attr_val.val_class)
4241 case dw_val_class_addr:
4242 fprintf (outfile, "address");
4244 case dw_val_class_loc:
4245 fprintf (outfile, "location descriptor");
4247 case dw_val_class_const:
4248 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4250 case dw_val_class_unsigned_const:
4251 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4253 case dw_val_class_long_long:
4254 fprintf (outfile, "constant (%lu,%lu)",
4255 a->dw_attr_val.v.val_long_long.hi,
4256 a->dw_attr_val.v.val_long_long.low);
4258 case dw_val_class_float:
4259 fprintf (outfile, "floating-point constant");
4261 case dw_val_class_flag:
4262 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4264 case dw_val_class_die_ref:
4265 if (a->dw_attr_val.v.val_die_ref != NULL)
4266 fprintf (outfile, "die -> %lu",
4267 a->dw_attr_val.v.val_die_ref->die_offset);
4269 fprintf (outfile, "die -> <null>");
4271 case dw_val_class_lbl_id:
4272 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4274 case dw_val_class_section_offset:
4275 fprintf (outfile, "section: %s", a->dw_attr_val.v.val_section);
4277 case dw_val_class_str:
4278 if (a->dw_attr_val.v.val_str != NULL)
4279 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4281 fprintf (outfile, "<null>");
4287 fprintf (outfile, "\n");
4290 if (die->die_child != NULL)
4293 for (c = die->die_child; c != NULL; c = c->die_sib)
4294 print_die (c, outfile);
4300 /* Print the contents of the source code line number correspondence table.
4301 This routine is a debugging aid only. */
4304 print_dwarf_line_table (outfile)
4307 register unsigned i;
4308 register dw_line_info_ref line_info;
4310 fprintf (outfile, "\n\nDWARF source line information\n");
4311 for (i = 1; i < line_info_table_in_use; ++i)
4313 line_info = &line_info_table[i];
4314 fprintf (outfile, "%5d: ", i);
4315 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4316 fprintf (outfile, "%6ld", line_info->dw_line_num);
4317 fprintf (outfile, "\n");
4320 fprintf (outfile, "\n\n");
4323 /* Print the information collected for a given DIE. */
4326 debug_dwarf_die (die)
4329 print_die (die, stderr);
4332 /* Print all DWARF information collected for the compilation unit.
4333 This routine is a debugging aid only. */
4339 print_die (comp_unit_die, stderr);
4340 print_dwarf_line_table (stderr);
4343 /* Traverse the DIE, and add a sibling attribute if it may have the
4344 effect of speeding up access to siblings. To save some space,
4345 avoid generating sibling attributes for DIE's without children. */
4348 add_sibling_attributes(die)
4349 register dw_die_ref die;
4351 register dw_die_ref c;
4352 register dw_attr_ref attr;
4353 if (die != comp_unit_die && die->die_child != NULL)
4355 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4356 attr->dw_attr_next = NULL;
4357 attr->dw_attr = DW_AT_sibling;
4358 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4359 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4361 /* Add the sibling link to the front of the attribute list. */
4362 attr->dw_attr_next = die->die_attr;
4363 if (die->die_attr == NULL)
4364 die->die_attr_last = attr;
4366 die->die_attr = attr;
4369 for (c = die->die_child; c != NULL; c = c->die_sib)
4370 add_sibling_attributes (c);
4373 /* The format of each DIE (and its attribute value pairs)
4374 is encoded in an abbreviation table. This routine builds the
4375 abbreviation table and assigns a unique abbreviation id for
4376 each abbreviation entry. The children of each die are visited
4380 build_abbrev_table (die)
4381 register dw_die_ref die;
4383 register unsigned long abbrev_id;
4384 register unsigned long n_alloc;
4385 register dw_die_ref c;
4386 register dw_attr_ref d_attr, a_attr;
4387 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4389 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4391 if (abbrev->die_tag == die->die_tag)
4393 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4395 a_attr = abbrev->die_attr;
4396 d_attr = die->die_attr;
4398 while (a_attr != NULL && d_attr != NULL)
4400 if ((a_attr->dw_attr != d_attr->dw_attr)
4401 || (value_format (&a_attr->dw_attr_val)
4402 != value_format (&d_attr->dw_attr_val)))
4405 a_attr = a_attr->dw_attr_next;
4406 d_attr = d_attr->dw_attr_next;
4409 if (a_attr == NULL && d_attr == NULL)
4415 if (abbrev_id >= abbrev_die_table_in_use)
4417 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4419 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4421 = (dw_die_ref *) xrealloc (abbrev_die_table,
4422 sizeof (dw_die_ref) * n_alloc);
4424 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4425 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4426 abbrev_die_table_allocated = n_alloc;
4429 ++abbrev_die_table_in_use;
4430 abbrev_die_table[abbrev_id] = die;
4433 die->die_abbrev = abbrev_id;
4434 for (c = die->die_child; c != NULL; c = c->die_sib)
4435 build_abbrev_table (c);
4438 /* Return the size of a string, including the null byte. */
4440 static unsigned long
4441 size_of_string (str)
4444 register unsigned long size = 0;
4445 register unsigned long slen = strlen (str);
4446 register unsigned long i;
4447 register unsigned c;
4449 for (i = 0; i < slen; ++i)
4458 /* Null terminator. */
4463 /* Return the size of a location descriptor. */
4465 static unsigned long
4466 size_of_loc_descr (loc)
4467 register dw_loc_descr_ref loc;
4469 register unsigned long size = 1;
4471 switch (loc->dw_loc_opc)
4493 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4496 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4501 case DW_OP_plus_uconst:
4502 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4540 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4543 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4546 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4549 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4550 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4553 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4555 case DW_OP_deref_size:
4556 case DW_OP_xderef_size:
4566 /* Return the size of a series of location descriptors. */
4568 static unsigned long
4570 register dw_loc_descr_ref loc;
4572 register unsigned long size = 0;
4574 for (; loc != NULL; loc = loc->dw_loc_next)
4575 size += size_of_loc_descr (loc);
4580 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4583 constant_size (value)
4584 long unsigned value;
4591 log = floor_log2 (value);
4594 log = 1 << (floor_log2 (log) + 1);
4599 /* Return the size of a DIE, as it is represented in the
4600 .debug_info section. */
4602 static unsigned long
4604 register dw_die_ref die;
4606 register unsigned long size = 0;
4607 register dw_attr_ref a;
4609 size += size_of_uleb128 (die->die_abbrev);
4610 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4612 switch (a->dw_attr_val.val_class)
4614 case dw_val_class_addr:
4617 case dw_val_class_loc:
4619 register unsigned long lsize
4620 = size_of_locs (a->dw_attr_val.v.val_loc);
4623 size += constant_size (lsize);
4627 case dw_val_class_const:
4630 case dw_val_class_unsigned_const:
4631 size += constant_size (a->dw_attr_val.v.val_unsigned);
4633 case dw_val_class_long_long:
4634 size += 1 + 8; /* block */
4636 case dw_val_class_float:
4637 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4639 case dw_val_class_flag:
4642 case dw_val_class_die_ref:
4643 size += DWARF_OFFSET_SIZE;
4645 case dw_val_class_fde_ref:
4646 size += DWARF_OFFSET_SIZE;
4648 case dw_val_class_lbl_id:
4651 case dw_val_class_section_offset:
4652 size += DWARF_OFFSET_SIZE;
4654 case dw_val_class_str:
4655 size += size_of_string (a->dw_attr_val.v.val_str);
4665 /* Size the debugging information associated with a given DIE.
4666 Visits the DIE's children recursively. Updates the global
4667 variable next_die_offset, on each time through. Uses the
4668 current value of next_die_offset to update the die_offset
4669 field in each DIE. */
4672 calc_die_sizes (die)
4675 register dw_die_ref c;
4676 die->die_offset = next_die_offset;
4677 next_die_offset += size_of_die (die);
4679 for (c = die->die_child; c != NULL; c = c->die_sib)
4682 if (die->die_child != NULL)
4683 /* Count the null byte used to terminate sibling lists. */
4684 next_die_offset += 1;
4687 /* Return the size of the line information prolog generated for the
4688 compilation unit. */
4690 static unsigned long
4691 size_of_line_prolog ()
4693 register unsigned long size;
4694 register unsigned long ft_index;
4696 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4698 /* Count the size of the table giving number of args for each
4700 size += DWARF_LINE_OPCODE_BASE - 1;
4702 /* Include directory table is empty (at present). Count only the
4703 null byte used to terminate the table. */
4706 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4708 /* File name entry. */
4709 size += size_of_string (file_table[ft_index]);
4711 /* Include directory index. */
4712 size += size_of_uleb128 (0);
4714 /* Modification time. */
4715 size += size_of_uleb128 (0);
4717 /* File length in bytes. */
4718 size += size_of_uleb128 (0);
4721 /* Count the file table terminator. */
4726 /* Return the size of the line information generated for this
4727 compilation unit. */
4729 static unsigned long
4730 size_of_line_info ()
4732 register unsigned long size;
4733 register unsigned long lt_index;
4734 register unsigned long current_line;
4735 register long line_offset;
4736 register long line_delta;
4737 register unsigned long current_file;
4738 register unsigned long function;
4739 unsigned long size_of_set_address;
4741 /* Size of a DW_LNE_set_address instruction. */
4742 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4744 /* Version number. */
4747 /* Prolog length specifier. */
4748 size += DWARF_OFFSET_SIZE;
4751 size += size_of_line_prolog ();
4753 /* Set address register instruction. */
4754 size += size_of_set_address;
4758 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4760 register dw_line_info_ref line_info;
4762 /* Advance pc instruction. */
4763 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4767 size += size_of_set_address;
4769 line_info = &line_info_table[lt_index];
4770 if (line_info->dw_file_num != current_file)
4772 /* Set file number instruction. */
4774 current_file = line_info->dw_file_num;
4775 size += size_of_uleb128 (current_file);
4778 if (line_info->dw_line_num != current_line)
4780 line_offset = line_info->dw_line_num - current_line;
4781 line_delta = line_offset - DWARF_LINE_BASE;
4782 current_line = line_info->dw_line_num;
4783 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4784 /* 1-byte special line number instruction. */
4788 /* Advance line instruction. */
4790 size += size_of_sleb128 (line_offset);
4791 /* Generate line entry instruction. */
4797 /* Advance pc instruction. */
4801 size += size_of_set_address;
4803 /* End of line number info. marker. */
4804 size += 1 + size_of_uleb128 (1) + 1;
4809 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4811 register dw_separate_line_info_ref line_info
4812 = &separate_line_info_table[lt_index];
4813 if (function != line_info->function)
4815 function = line_info->function;
4816 /* Set address register instruction. */
4817 size += size_of_set_address;
4821 /* Advance pc instruction. */
4825 size += size_of_set_address;
4828 if (line_info->dw_file_num != current_file)
4830 /* Set file number instruction. */
4832 current_file = line_info->dw_file_num;
4833 size += size_of_uleb128 (current_file);
4836 if (line_info->dw_line_num != current_line)
4838 line_offset = line_info->dw_line_num - current_line;
4839 line_delta = line_offset - DWARF_LINE_BASE;
4840 current_line = line_info->dw_line_num;
4841 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4842 /* 1-byte special line number instruction. */
4846 /* Advance line instruction. */
4848 size += size_of_sleb128 (line_offset);
4850 /* Generate line entry instruction. */
4857 /* If we're done with a function, end its sequence. */
4858 if (lt_index == separate_line_info_table_in_use
4859 || separate_line_info_table[lt_index].function != function)
4864 /* Advance pc instruction. */
4868 size += size_of_set_address;
4870 /* End of line number info. marker. */
4871 size += 1 + size_of_uleb128 (1) + 1;
4878 /* Return the size of the .debug_pubnames table generated for the
4879 compilation unit. */
4881 static unsigned long
4884 register unsigned long size;
4885 register unsigned i;
4887 size = DWARF_PUBNAMES_HEADER_SIZE;
4888 for (i = 0; i < pubname_table_in_use; ++i)
4890 register pubname_ref p = &pubname_table[i];
4891 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4894 size += DWARF_OFFSET_SIZE;
4898 /* Return the size of the information in the .debug_aranges section. */
4900 static unsigned long
4903 register unsigned long size;
4905 size = DWARF_ARANGES_HEADER_SIZE;
4907 /* Count the address/length pair for this compilation unit. */
4908 size += 2 * PTR_SIZE;
4909 size += 2 * PTR_SIZE * arange_table_in_use;
4911 /* Count the two zero words used to terminated the address range table. */
4912 size += 2 * PTR_SIZE;
4916 /* Select the encoding of an attribute value. */
4918 static enum dwarf_form
4922 switch (v->val_class)
4924 case dw_val_class_addr:
4925 return DW_FORM_addr;
4926 case dw_val_class_loc:
4927 switch (constant_size (size_of_locs (v->v.val_loc)))
4930 return DW_FORM_block1;
4932 return DW_FORM_block2;
4936 case dw_val_class_const:
4937 return DW_FORM_data4;
4938 case dw_val_class_unsigned_const:
4939 switch (constant_size (v->v.val_unsigned))
4942 return DW_FORM_data1;
4944 return DW_FORM_data2;
4946 return DW_FORM_data4;
4948 return DW_FORM_data8;
4952 case dw_val_class_long_long:
4953 return DW_FORM_block1;
4954 case dw_val_class_float:
4955 return DW_FORM_block1;
4956 case dw_val_class_flag:
4957 return DW_FORM_flag;
4958 case dw_val_class_die_ref:
4960 case dw_val_class_fde_ref:
4961 return DW_FORM_data;
4962 case dw_val_class_lbl_id:
4963 return DW_FORM_addr;
4964 case dw_val_class_section_offset:
4965 return DW_FORM_data;
4966 case dw_val_class_str:
4967 return DW_FORM_string;
4973 /* Output the encoding of an attribute value. */
4976 output_value_format (v)
4979 enum dwarf_form form = value_format (v);
4981 output_uleb128 (form);
4983 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
4985 fputc ('\n', asm_out_file);
4988 /* Output the .debug_abbrev section which defines the DIE abbreviation
4992 output_abbrev_section ()
4994 unsigned long abbrev_id;
4997 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4999 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5001 output_uleb128 (abbrev_id);
5003 fprintf (asm_out_file, " (abbrev code)");
5005 fputc ('\n', asm_out_file);
5006 output_uleb128 (abbrev->die_tag);
5008 fprintf (asm_out_file, " (TAG: %s)",
5009 dwarf_tag_name (abbrev->die_tag));
5011 fputc ('\n', asm_out_file);
5012 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5013 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5016 fprintf (asm_out_file, "\t%s %s",
5018 (abbrev->die_child != NULL
5019 ? "DW_children_yes" : "DW_children_no"));
5021 fputc ('\n', asm_out_file);
5023 for (a_attr = abbrev->die_attr; a_attr != NULL;
5024 a_attr = a_attr->dw_attr_next)
5026 output_uleb128 (a_attr->dw_attr);
5028 fprintf (asm_out_file, " (%s)",
5029 dwarf_attr_name (a_attr->dw_attr));
5031 fputc ('\n', asm_out_file);
5032 output_value_format (&a_attr->dw_attr_val);
5035 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5039 /* Output location description stack opcode's operands (if any). */
5042 output_loc_operands (loc)
5043 register dw_loc_descr_ref loc;
5045 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5046 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5048 switch (loc->dw_loc_opc)
5051 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5052 fputc ('\n', asm_out_file);
5056 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5057 fputc ('\n', asm_out_file);
5061 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5062 fputc ('\n', asm_out_file);
5066 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5067 fputc ('\n', asm_out_file);
5072 fputc ('\n', asm_out_file);
5075 output_uleb128 (val1->v.val_unsigned);
5076 fputc ('\n', asm_out_file);
5079 output_sleb128 (val1->v.val_int);
5080 fputc ('\n', asm_out_file);
5083 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5084 fputc ('\n', asm_out_file);
5086 case DW_OP_plus_uconst:
5087 output_uleb128 (val1->v.val_unsigned);
5088 fputc ('\n', asm_out_file);
5092 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5093 fputc ('\n', asm_out_file);
5127 output_sleb128 (val1->v.val_int);
5128 fputc ('\n', asm_out_file);
5131 output_uleb128 (val1->v.val_unsigned);
5132 fputc ('\n', asm_out_file);
5135 output_sleb128 (val1->v.val_int);
5136 fputc ('\n', asm_out_file);
5139 output_uleb128 (val1->v.val_unsigned);
5140 fputc ('\n', asm_out_file);
5141 output_sleb128 (val2->v.val_int);
5142 fputc ('\n', asm_out_file);
5145 output_uleb128 (val1->v.val_unsigned);
5146 fputc ('\n', asm_out_file);
5148 case DW_OP_deref_size:
5149 case DW_OP_xderef_size:
5150 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5151 fputc ('\n', asm_out_file);
5158 /* Compute the offset of a sibling. */
5160 static unsigned long
5161 sibling_offset (die)
5164 unsigned long offset;
5166 if (die->die_child_last == NULL)
5167 offset = die->die_offset + size_of_die (die);
5169 offset = sibling_offset (die->die_child_last) + 1;
5174 /* Output the DIE and its attributes. Called recursively to generate
5175 the definitions of each child DIE. */
5179 register dw_die_ref die;
5181 register dw_attr_ref a;
5182 register dw_die_ref c;
5183 register unsigned long ref_offset;
5184 register unsigned long size;
5185 register dw_loc_descr_ref loc;
5188 output_uleb128 (die->die_abbrev);
5190 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5191 die->die_offset, dwarf_tag_name (die->die_tag));
5193 fputc ('\n', asm_out_file);
5195 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5197 switch (a->dw_attr_val.val_class)
5199 case dw_val_class_addr:
5200 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5201 a->dw_attr_val.v.val_addr);
5204 case dw_val_class_loc:
5205 size = size_of_locs (a->dw_attr_val.v.val_loc);
5207 /* Output the block length for this list of location operations. */
5208 switch (constant_size (size))
5211 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5214 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5221 fprintf (asm_out_file, "\t%s %s",
5222 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5224 fputc ('\n', asm_out_file);
5225 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5226 loc = loc->dw_loc_next)
5228 /* Output the opcode. */
5229 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5231 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5232 dwarf_stack_op_name (loc->dw_loc_opc));
5234 fputc ('\n', asm_out_file);
5236 /* Output the operand(s) (if any). */
5237 output_loc_operands (loc);
5241 case dw_val_class_const:
5242 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5245 case dw_val_class_unsigned_const:
5246 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5249 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5250 a->dw_attr_val.v.val_unsigned);
5253 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5254 a->dw_attr_val.v.val_unsigned);
5257 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5258 a->dw_attr_val.v.val_unsigned);
5261 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5262 a->dw_attr_val.v.val_long_long.hi,
5263 a->dw_attr_val.v.val_long_long.low);
5270 case dw_val_class_long_long:
5271 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5273 fprintf (asm_out_file, "\t%s %s",
5274 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5276 fputc ('\n', asm_out_file);
5277 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5278 a->dw_attr_val.v.val_long_long.hi,
5279 a->dw_attr_val.v.val_long_long.low);
5282 fprintf (asm_out_file,
5283 "\t%s long long constant", ASM_COMMENT_START);
5285 fputc ('\n', asm_out_file);
5288 case dw_val_class_float:
5289 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5290 a->dw_attr_val.v.val_float.length * 4);
5292 fprintf (asm_out_file, "\t%s %s",
5293 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5295 fputc ('\n', asm_out_file);
5296 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5298 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5299 a->dw_attr_val.v.val_float.array[i]);
5301 fprintf (asm_out_file, "\t%s fp constant word %d",
5302 ASM_COMMENT_START, i);
5304 fputc ('\n', asm_out_file);
5308 case dw_val_class_flag:
5309 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5312 case dw_val_class_die_ref:
5313 if (a->dw_attr_val.v.val_die_ref != NULL)
5314 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5315 else if (a->dw_attr == DW_AT_sibling)
5316 ref_offset = sibling_offset(die);
5320 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5323 case dw_val_class_fde_ref:
5326 ASM_GENERATE_INTERNAL_LABEL
5327 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5328 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5329 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5333 case dw_val_class_lbl_id:
5334 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5337 case dw_val_class_section_offset:
5338 ASM_OUTPUT_DWARF_OFFSET (asm_out_file,
5340 (a->dw_attr_val.v.val_section));
5343 case dw_val_class_str:
5345 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5347 ASM_OUTPUT_ASCII (asm_out_file,
5348 a->dw_attr_val.v.val_str,
5349 strlen (a->dw_attr_val.v.val_str) + 1);
5356 if (a->dw_attr_val.val_class != dw_val_class_loc
5357 && a->dw_attr_val.val_class != dw_val_class_long_long
5358 && a->dw_attr_val.val_class != dw_val_class_float)
5361 fprintf (asm_out_file, "\t%s %s",
5362 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5364 fputc ('\n', asm_out_file);
5368 for (c = die->die_child; c != NULL; c = c->die_sib)
5371 if (die->die_child != NULL)
5373 /* Add null byte to terminate sibling list. */
5374 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5376 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5377 ASM_COMMENT_START, die->die_offset);
5379 fputc ('\n', asm_out_file);
5383 /* Output the compilation unit that appears at the beginning of the
5384 .debug_info section, and precedes the DIE descriptions. */
5387 output_compilation_unit_header ()
5389 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5391 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5394 fputc ('\n', asm_out_file);
5395 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5397 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5399 fputc ('\n', asm_out_file);
5400 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (ABBREV_SECTION));
5402 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5405 fputc ('\n', asm_out_file);
5406 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5408 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5410 fputc ('\n', asm_out_file);
5413 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5414 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5415 argument list, and maybe the scope. */
5418 dwarf2_name (decl, scope)
5422 return (*decl_printable_name) (decl, scope ? 1 : 0);
5425 /* Add a new entry to .debug_pubnames if appropriate. */
5428 add_pubname (decl, die)
5434 if (! TREE_PUBLIC (decl))
5437 if (pubname_table_in_use == pubname_table_allocated)
5439 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5440 pubname_table = (pubname_ref) xrealloc
5441 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5444 p = &pubname_table[pubname_table_in_use++];
5447 p->name = xstrdup (dwarf2_name (decl, 1));
5450 /* Output the public names table used to speed up access to externally
5451 visible names. For now, only generate entries for externally
5452 visible procedures. */
5457 register unsigned i;
5458 register unsigned long pubnames_length = size_of_pubnames ();
5460 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5463 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5466 fputc ('\n', asm_out_file);
5467 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5470 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5472 fputc ('\n', asm_out_file);
5473 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5475 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5478 fputc ('\n', asm_out_file);
5479 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5481 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5483 fputc ('\n', asm_out_file);
5484 for (i = 0; i < pubname_table_in_use; ++i)
5486 register pubname_ref pub = &pubname_table[i];
5488 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5490 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5492 fputc ('\n', asm_out_file);
5496 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5497 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5501 ASM_OUTPUT_ASCII (asm_out_file, pub->name, strlen (pub->name) + 1);
5504 fputc ('\n', asm_out_file);
5507 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5508 fputc ('\n', asm_out_file);
5511 /* Add a new entry to .debug_aranges if appropriate. */
5514 add_arange (decl, die)
5518 if (! DECL_SECTION_NAME (decl))
5521 if (arange_table_in_use == arange_table_allocated)
5523 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5525 = (arange_ref) xrealloc (arange_table,
5526 arange_table_allocated * sizeof (dw_die_ref));
5529 arange_table[arange_table_in_use++] = die;
5532 /* Output the information that goes into the .debug_aranges table.
5533 Namely, define the beginning and ending address range of the
5534 text section generated for this compilation unit. */
5539 register unsigned i;
5540 register unsigned long aranges_length = size_of_aranges ();
5542 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5544 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5547 fputc ('\n', asm_out_file);
5548 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5550 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5552 fputc ('\n', asm_out_file);
5553 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5555 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5558 fputc ('\n', asm_out_file);
5559 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5561 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5563 fputc ('\n', asm_out_file);
5564 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5566 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5569 fputc ('\n', asm_out_file);
5570 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
5572 fprintf (asm_out_file, ",0,0");
5575 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5576 ASM_COMMENT_START, 2 * PTR_SIZE);
5578 fputc ('\n', asm_out_file);
5579 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
5581 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5583 fputc ('\n', asm_out_file);
5584 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label, TEXT_SECTION);
5586 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5588 fputc ('\n', asm_out_file);
5589 for (i = 0; i < arange_table_in_use; ++i)
5591 dw_die_ref a = arange_table[i];
5593 if (a->die_tag == DW_TAG_subprogram)
5594 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
5597 char *name = get_AT_string (a, DW_AT_MIPS_linkage_name);
5599 name = get_AT_string (a, DW_AT_name);
5601 ASM_OUTPUT_DWARF_ADDR (asm_out_file, name);
5605 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5607 fputc ('\n', asm_out_file);
5608 if (a->die_tag == DW_TAG_subprogram)
5609 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
5612 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5613 get_AT_unsigned (a, DW_AT_byte_size));
5616 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5618 fputc ('\n', asm_out_file);
5621 /* Output the terminator words. */
5622 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5623 fputc ('\n', asm_out_file);
5624 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5625 fputc ('\n', asm_out_file);
5628 /* Output the source line number correspondence information. This
5629 information goes into the .debug_line section.
5631 If the format of this data changes, then the function size_of_line_info
5632 must also be adjusted the same way. */
5637 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5638 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5639 register unsigned opc;
5640 register unsigned n_op_args;
5641 register unsigned long ft_index;
5642 register unsigned long lt_index;
5643 register unsigned long current_line;
5644 register long line_offset;
5645 register long line_delta;
5646 register unsigned long current_file;
5647 register unsigned long function;
5649 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5651 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5654 fputc ('\n', asm_out_file);
5655 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5657 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5659 fputc ('\n', asm_out_file);
5660 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5662 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5664 fputc ('\n', asm_out_file);
5665 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5667 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5670 fputc ('\n', asm_out_file);
5671 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5673 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5676 fputc ('\n', asm_out_file);
5677 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5679 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5682 fputc ('\n', asm_out_file);
5683 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5685 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5688 fputc ('\n', asm_out_file);
5689 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5691 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5693 fputc ('\n', asm_out_file);
5694 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5698 case DW_LNS_advance_pc:
5699 case DW_LNS_advance_line:
5700 case DW_LNS_set_file:
5701 case DW_LNS_set_column:
5702 case DW_LNS_fixed_advance_pc:
5709 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5711 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5712 ASM_COMMENT_START, opc, n_op_args);
5713 fputc ('\n', asm_out_file);
5717 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5719 /* Include directory table is empty, at present */
5720 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5721 fputc ('\n', asm_out_file);
5723 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5725 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5729 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5730 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5731 ASM_COMMENT_START, ft_index);
5735 ASM_OUTPUT_ASCII (asm_out_file,
5736 file_table[ft_index],
5737 strlen (file_table[ft_index]) + 1);
5740 fputc ('\n', asm_out_file);
5742 /* Include directory index */
5744 fputc ('\n', asm_out_file);
5746 /* Modification time */
5748 fputc ('\n', asm_out_file);
5750 /* File length in bytes */
5752 fputc ('\n', asm_out_file);
5755 /* Terminate the file name table */
5756 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5757 fputc ('\n', asm_out_file);
5759 /* Set the address register to the first location in the text section */
5760 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5762 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5764 fputc ('\n', asm_out_file);
5765 output_uleb128 (1 + PTR_SIZE);
5766 fputc ('\n', asm_out_file);
5767 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5768 fputc ('\n', asm_out_file);
5769 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
5770 fputc ('\n', asm_out_file);
5772 /* Generate the line number to PC correspondence table, encoded as
5773 a series of state machine operations. */
5776 strcpy (prev_line_label, TEXT_SECTION);
5777 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5779 register dw_line_info_ref line_info;
5781 /* Emit debug info for the address of the current line, choosing
5782 the encoding that uses the least amount of space. */
5783 /* ??? Unfortunately, we have little choice here currently, and must
5784 always use the most general form. Gcc does not know the address
5785 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5786 dwarf2 aware assemblers at this time, so we can't use any special
5787 pseudo ops that would allow the assembler to optimally encode this for
5788 us. Many ports do have length attributes which will give an upper
5789 bound on the address range. We could perhaps use length attributes
5790 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5791 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5794 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5795 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5797 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5800 fputc ('\n', asm_out_file);
5801 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5802 fputc ('\n', asm_out_file);
5806 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5807 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5809 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5811 fputc ('\n', asm_out_file);
5812 output_uleb128 (1 + PTR_SIZE);
5813 fputc ('\n', asm_out_file);
5814 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5815 fputc ('\n', asm_out_file);
5816 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5817 fputc ('\n', asm_out_file);
5819 strcpy (prev_line_label, line_label);
5821 /* Emit debug info for the source file of the current line, if
5822 different from the previous line. */
5823 line_info = &line_info_table[lt_index];
5824 if (line_info->dw_file_num != current_file)
5826 current_file = line_info->dw_file_num;
5827 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5829 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5831 fputc ('\n', asm_out_file);
5832 output_uleb128 (current_file);
5834 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5836 fputc ('\n', asm_out_file);
5839 /* Emit debug info for the current line number, choosing the encoding
5840 that uses the least amount of space. */
5841 line_offset = line_info->dw_line_num - current_line;
5842 line_delta = line_offset - DWARF_LINE_BASE;
5843 current_line = line_info->dw_line_num;
5844 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5846 /* This can handle deltas from -10 to 234, using the current
5847 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5849 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5850 DWARF_LINE_OPCODE_BASE + line_delta);
5852 fprintf (asm_out_file,
5853 "\t%s line %ld", ASM_COMMENT_START, current_line);
5855 fputc ('\n', asm_out_file);
5859 /* This can handle any delta. This takes at least 4 bytes, depending
5860 on the value being encoded. */
5861 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5863 fprintf (asm_out_file, "\t%s advance to line %ld",
5864 ASM_COMMENT_START, current_line);
5866 fputc ('\n', asm_out_file);
5867 output_sleb128 (line_offset);
5868 fputc ('\n', asm_out_file);
5869 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5870 fputc ('\n', asm_out_file);
5874 /* Emit debug info for the address of the end of the function. */
5877 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5879 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5882 fputc ('\n', asm_out_file);
5883 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
5884 fputc ('\n', asm_out_file);
5888 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5890 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5891 fputc ('\n', asm_out_file);
5892 output_uleb128 (1 + PTR_SIZE);
5893 fputc ('\n', asm_out_file);
5894 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5895 fputc ('\n', asm_out_file);
5896 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
5897 fputc ('\n', asm_out_file);
5900 /* Output the marker for the end of the line number info. */
5901 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5903 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
5905 fputc ('\n', asm_out_file);
5907 fputc ('\n', asm_out_file);
5908 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
5909 fputc ('\n', asm_out_file);
5914 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
5916 register dw_separate_line_info_ref line_info
5917 = &separate_line_info_table[lt_index];
5919 /* Emit debug info for the address of the current line. If this is
5920 a new function, or the first line of a function, then we need
5921 to handle it differently. */
5922 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
5924 if (function != line_info->function)
5926 function = line_info->function;
5928 /* Set the address register to the first line in the function */
5929 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5931 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
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, line_label);
5940 fputc ('\n', asm_out_file);
5944 /* ??? See the DW_LNS_advance_pc comment above. */
5947 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5949 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5952 fputc ('\n', asm_out_file);
5953 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
5955 fputc ('\n', asm_out_file);
5959 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5961 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5963 fputc ('\n', asm_out_file);
5964 output_uleb128 (1 + PTR_SIZE);
5965 fputc ('\n', asm_out_file);
5966 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5967 fputc ('\n', asm_out_file);
5968 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5969 fputc ('\n', asm_out_file);
5972 strcpy (prev_line_label, line_label);
5974 /* Emit debug info for the source file of the current line, if
5975 different from the previous line. */
5976 if (line_info->dw_file_num != current_file)
5978 current_file = line_info->dw_file_num;
5979 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5981 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5983 fputc ('\n', asm_out_file);
5984 output_uleb128 (current_file);
5986 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5988 fputc ('\n', asm_out_file);
5991 /* Emit debug info for the current line number, choosing the encoding
5992 that uses the least amount of space. */
5993 if (line_info->dw_line_num != current_line)
5995 line_offset = line_info->dw_line_num - current_line;
5996 line_delta = line_offset - DWARF_LINE_BASE;
5997 current_line = line_info->dw_line_num;
5998 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6000 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6001 DWARF_LINE_OPCODE_BASE + line_delta);
6003 fprintf (asm_out_file,
6004 "\t%s line %ld", ASM_COMMENT_START, current_line);
6006 fputc ('\n', asm_out_file);
6010 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6012 fprintf (asm_out_file, "\t%s advance to line %ld",
6013 ASM_COMMENT_START, current_line);
6015 fputc ('\n', asm_out_file);
6016 output_sleb128 (line_offset);
6017 fputc ('\n', asm_out_file);
6018 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6019 fputc ('\n', asm_out_file);
6025 /* If we're done with a function, end its sequence. */
6026 if (lt_index == separate_line_info_table_in_use
6027 || separate_line_info_table[lt_index].function != function)
6032 /* Emit debug info for the address of the end of the function. */
6033 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6036 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6038 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6041 fputc ('\n', asm_out_file);
6042 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6044 fputc ('\n', asm_out_file);
6048 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6050 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6052 fputc ('\n', asm_out_file);
6053 output_uleb128 (1 + PTR_SIZE);
6054 fputc ('\n', asm_out_file);
6055 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6056 fputc ('\n', asm_out_file);
6057 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6058 fputc ('\n', asm_out_file);
6061 /* Output the marker for the end of this sequence. */
6062 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6064 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6067 fputc ('\n', asm_out_file);
6069 fputc ('\n', asm_out_file);
6070 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6071 fputc ('\n', asm_out_file);
6076 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6077 in question represents the outermost pair of curly braces (i.e. the "body
6078 block") of a function or method.
6080 For any BLOCK node representing a "body block" of a function or method, the
6081 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6082 represents the outermost (function) scope for the function or method (i.e.
6083 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6084 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6087 is_body_block (stmt)
6090 if (TREE_CODE (stmt) == BLOCK)
6092 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6094 if (TREE_CODE (parent) == BLOCK)
6096 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6098 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6106 /* Given a pointer to a tree node for some base type, return a pointer to
6107 a DIE that describes the given type.
6109 This routine must only be called for GCC type nodes that correspond to
6110 Dwarf base (fundamental) types. */
6113 base_type_die (type)
6116 register dw_die_ref base_type_result;
6117 register char *type_name;
6118 register enum dwarf_type encoding;
6119 register tree name = TYPE_NAME (type);
6121 if (TREE_CODE (type) == ERROR_MARK
6122 || TREE_CODE (type) == VOID_TYPE)
6125 if (TREE_CODE (name) == TYPE_DECL)
6126 name = DECL_NAME (name);
6127 type_name = IDENTIFIER_POINTER (name);
6129 switch (TREE_CODE (type))
6132 /* Carefully distinguish the C character types, without messing
6133 up if the language is not C. Note that we check only for the names
6134 that contain spaces; other names might occur by coincidence in other
6136 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6137 && (type == char_type_node
6138 || ! strcmp (type_name, "signed char")
6139 || ! strcmp (type_name, "unsigned char"))))
6141 if (TREE_UNSIGNED (type))
6142 encoding = DW_ATE_unsigned;
6144 encoding = DW_ATE_signed;
6147 /* else fall through */
6150 /* GNU Pascal/Ada CHAR type. Not used in C. */
6151 if (TREE_UNSIGNED (type))
6152 encoding = DW_ATE_unsigned_char;
6154 encoding = DW_ATE_signed_char;
6158 encoding = DW_ATE_float;
6162 encoding = DW_ATE_complex_float;
6166 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6167 encoding = DW_ATE_boolean;
6171 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6174 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6175 add_AT_string (base_type_result, DW_AT_name, type_name);
6176 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6177 TYPE_PRECISION (type) / BITS_PER_UNIT);
6178 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6180 return base_type_result;
6183 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6184 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6185 a given type is generally the same as the given type, except that if the
6186 given type is a pointer or reference type, then the root type of the given
6187 type is the root type of the "basis" type for the pointer or reference
6188 type. (This definition of the "root" type is recursive.) Also, the root
6189 type of a `const' qualified type or a `volatile' qualified type is the
6190 root type of the given type without the qualifiers. */
6196 if (TREE_CODE (type) == ERROR_MARK)
6197 return error_mark_node;
6199 switch (TREE_CODE (type))
6202 return error_mark_node;
6205 case REFERENCE_TYPE:
6206 return type_main_variant (root_type (TREE_TYPE (type)));
6209 return type_main_variant (type);
6213 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6214 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6220 switch (TREE_CODE (type))
6235 case QUAL_UNION_TYPE:
6240 case REFERENCE_TYPE:
6253 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6254 entry that chains various modifiers in front of the given type. */
6257 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6259 register int is_const_type;
6260 register int is_volatile_type;
6261 register dw_die_ref context_die;
6263 register enum tree_code code = TREE_CODE (type);
6264 register dw_die_ref mod_type_die = NULL;
6265 register dw_die_ref sub_die = NULL;
6266 register tree item_type = NULL;
6268 if (code != ERROR_MARK)
6270 type = build_type_variant (type, is_const_type, is_volatile_type);
6272 mod_type_die = lookup_type_die (type);
6274 return mod_type_die;
6276 /* Handle C typedef types. */
6277 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6278 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6280 tree dtype = TREE_TYPE (TYPE_NAME (type));
6283 /* For a named type, use the typedef. */
6284 gen_type_die (type, context_die);
6285 mod_type_die = lookup_type_die (type);
6288 else if (is_const_type < TYPE_READONLY (dtype)
6289 || is_volatile_type < TYPE_VOLATILE (dtype))
6290 /* cv-unqualified version of named type. Just use the unnamed
6291 type to which it refers. */
6293 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6294 is_const_type, is_volatile_type,
6296 /* Else cv-qualified version of named type; fall through. */
6301 else if (is_const_type)
6303 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6304 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6306 else if (is_volatile_type)
6308 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6309 sub_die = modified_type_die (type, 0, 0, context_die);
6311 else if (code == POINTER_TYPE)
6313 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6314 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6316 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6318 item_type = TREE_TYPE (type);
6320 else if (code == REFERENCE_TYPE)
6322 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6323 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6325 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6327 item_type = TREE_TYPE (type);
6329 else if (is_base_type (type))
6330 mod_type_die = base_type_die (type);
6333 gen_type_die (type, context_die);
6335 /* We have to get the type_main_variant here (and pass that to the
6336 `lookup_type_die' routine) because the ..._TYPE node we have
6337 might simply be a *copy* of some original type node (where the
6338 copy was created to help us keep track of typedef names) and
6339 that copy might have a different TYPE_UID from the original
6341 mod_type_die = lookup_type_die (type_main_variant (type));
6342 if (mod_type_die == NULL)
6347 equate_type_number_to_die (type, mod_type_die);
6349 /* We must do this after the equate_type_number_to_die call, in case
6350 this is a recursive type. This ensures that the modified_type_die
6351 recursion will terminate even if the type is recursive. Recursive
6352 types are possible in Ada. */
6353 sub_die = modified_type_die (item_type,
6354 TYPE_READONLY (item_type),
6355 TYPE_VOLATILE (item_type),
6358 if (sub_die != NULL)
6359 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6361 return mod_type_die;
6364 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6365 an enumerated type. */
6371 return TREE_CODE (type) == ENUMERAL_TYPE;
6374 /* Return a location descriptor that designates a machine register. */
6376 static dw_loc_descr_ref
6377 reg_loc_descriptor (rtl)
6380 register dw_loc_descr_ref loc_result = NULL;
6381 register unsigned reg = reg_number (rtl);
6384 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6386 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6391 /* Return a location descriptor that designates a base+offset location. */
6393 static dw_loc_descr_ref
6394 based_loc_descr (reg, offset)
6398 register dw_loc_descr_ref loc_result;
6399 /* For the "frame base", we use the frame pointer or stack pointer
6400 registers, since the RTL for local variables is relative to one of
6402 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6403 ? HARD_FRAME_POINTER_REGNUM
6404 : STACK_POINTER_REGNUM);
6407 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6409 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6411 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6416 /* Return true if this RTL expression describes a base+offset calculation. */
6422 return (GET_CODE (rtl) == PLUS
6423 && ((GET_CODE (XEXP (rtl, 0)) == REG
6424 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6427 /* The following routine converts the RTL for a variable or parameter
6428 (resident in memory) into an equivalent Dwarf representation of a
6429 mechanism for getting the address of that same variable onto the top of a
6430 hypothetical "address evaluation" stack.
6432 When creating memory location descriptors, we are effectively transforming
6433 the RTL for a memory-resident object into its Dwarf postfix expression
6434 equivalent. This routine recursively descends an RTL tree, turning
6435 it into Dwarf postfix code as it goes. */
6437 static dw_loc_descr_ref
6438 mem_loc_descriptor (rtl)
6441 dw_loc_descr_ref mem_loc_result = NULL;
6442 /* Note that for a dynamically sized array, the location we will generate a
6443 description of here will be the lowest numbered location which is
6444 actually within the array. That's *not* necessarily the same as the
6445 zeroth element of the array. */
6447 switch (GET_CODE (rtl))
6450 /* The case of a subreg may arise when we have a local (register)
6451 variable or a formal (register) parameter which doesn't quite fill
6452 up an entire register. For now, just assume that it is
6453 legitimate to make the Dwarf info refer to the whole register which
6454 contains the given subreg. */
6455 rtl = XEXP (rtl, 0);
6457 /* ... fall through ... */
6460 /* Whenever a register number forms a part of the description of the
6461 method for calculating the (dynamic) address of a memory resident
6462 object, DWARF rules require the register number be referred to as
6463 a "base register". This distinction is not based in any way upon
6464 what category of register the hardware believes the given register
6465 belongs to. This is strictly DWARF terminology we're dealing with
6466 here. Note that in cases where the location of a memory-resident
6467 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6468 OP_CONST (0)) the actual DWARF location descriptor that we generate
6469 may just be OP_BASEREG (basereg). This may look deceptively like
6470 the object in question was allocated to a register (rather than in
6471 memory) so DWARF consumers need to be aware of the subtle
6472 distinction between OP_REG and OP_BASEREG. */
6473 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6477 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6478 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6483 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6484 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6485 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6489 if (is_based_loc (rtl))
6490 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6491 INTVAL (XEXP (rtl, 1)));
6494 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6495 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6496 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6501 /* If a pseudo-reg is optimized away, it is possible for it to
6502 be replaced with a MEM containing a multiply. */
6503 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6504 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6505 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6509 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6516 return mem_loc_result;
6519 /* Return a descriptor that describes the concatenation of two locations.
6520 This is typically a complex variable. */
6522 static dw_loc_descr_ref
6523 concat_loc_descriptor (x0, x1)
6524 register rtx x0, x1;
6526 dw_loc_descr_ref cc_loc_result = NULL;
6528 if (!is_pseudo_reg (x0)
6529 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6530 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6531 add_loc_descr (&cc_loc_result,
6532 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6534 if (!is_pseudo_reg (x1)
6535 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6536 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6537 add_loc_descr (&cc_loc_result,
6538 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6540 return cc_loc_result;
6543 /* Output a proper Dwarf location descriptor for a variable or parameter
6544 which is either allocated in a register or in a memory location. For a
6545 register, we just generate an OP_REG and the register number. For a
6546 memory location we provide a Dwarf postfix expression describing how to
6547 generate the (dynamic) address of the object onto the address stack. */
6549 static dw_loc_descr_ref
6550 loc_descriptor (rtl)
6553 dw_loc_descr_ref loc_result = NULL;
6554 switch (GET_CODE (rtl))
6557 /* The case of a subreg may arise when we have a local (register)
6558 variable or a formal (register) parameter which doesn't quite fill
6559 up an entire register. For now, just assume that it is
6560 legitimate to make the Dwarf info refer to the whole register which
6561 contains the given subreg. */
6562 rtl = XEXP (rtl, 0);
6564 /* ... fall through ... */
6567 loc_result = reg_loc_descriptor (rtl);
6571 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6575 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6585 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6586 which is not less than the value itself. */
6588 static inline unsigned
6589 ceiling (value, boundary)
6590 register unsigned value;
6591 register unsigned boundary;
6593 return (((value + boundary - 1) / boundary) * boundary);
6596 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6597 pointer to the declared type for the relevant field variable, or return
6598 `integer_type_node' if the given node turns out to be an
6607 if (TREE_CODE (decl) == ERROR_MARK)
6608 return integer_type_node;
6610 type = DECL_BIT_FIELD_TYPE (decl);
6611 if (type == NULL_TREE)
6612 type = TREE_TYPE (decl);
6617 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6618 node, return the alignment in bits for the type, or else return
6619 BITS_PER_WORD if the node actually turns out to be an
6622 static inline unsigned
6623 simple_type_align_in_bits (type)
6626 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6629 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6630 node, return the size in bits for the type if it is a constant, or else
6631 return the alignment for the type if the type's size is not constant, or
6632 else return BITS_PER_WORD if the type actually turns out to be an
6635 static inline unsigned
6636 simple_type_size_in_bits (type)
6639 if (TREE_CODE (type) == ERROR_MARK)
6640 return BITS_PER_WORD;
6643 register tree type_size_tree = TYPE_SIZE (type);
6645 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6646 return TYPE_ALIGN (type);
6648 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6652 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6653 return the byte offset of the lowest addressed byte of the "containing
6654 object" for the given FIELD_DECL, or return 0 if we are unable to
6655 determine what that offset is, either because the argument turns out to
6656 be a pointer to an ERROR_MARK node, or because the offset is actually
6657 variable. (We can't handle the latter case just yet). */
6660 field_byte_offset (decl)
6663 register unsigned type_align_in_bytes;
6664 register unsigned type_align_in_bits;
6665 register unsigned type_size_in_bits;
6666 register unsigned object_offset_in_align_units;
6667 register unsigned object_offset_in_bits;
6668 register unsigned object_offset_in_bytes;
6670 register tree bitpos_tree;
6671 register tree field_size_tree;
6672 register unsigned bitpos_int;
6673 register unsigned deepest_bitpos;
6674 register unsigned field_size_in_bits;
6676 if (TREE_CODE (decl) == ERROR_MARK)
6679 if (TREE_CODE (decl) != FIELD_DECL)
6682 type = field_type (decl);
6684 bitpos_tree = DECL_FIELD_BITPOS (decl);
6685 field_size_tree = DECL_SIZE (decl);
6687 /* We cannot yet cope with fields whose positions or sizes are variable, so
6688 for now, when we see such things, we simply return 0. Someday, we may
6689 be able to handle such cases, but it will be damn difficult. */
6690 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6692 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6694 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6697 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6698 type_size_in_bits = simple_type_size_in_bits (type);
6699 type_align_in_bits = simple_type_align_in_bits (type);
6700 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6702 /* Note that the GCC front-end doesn't make any attempt to keep track of
6703 the starting bit offset (relative to the start of the containing
6704 structure type) of the hypothetical "containing object" for a bit-
6705 field. Thus, when computing the byte offset value for the start of the
6706 "containing object" of a bit-field, we must deduce this information on
6707 our own. This can be rather tricky to do in some cases. For example,
6708 handling the following structure type definition when compiling for an
6709 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6712 struct S { int field1; long long field2:31; };
6714 Fortunately, there is a simple rule-of-thumb which can be
6715 used in such cases. When compiling for an i386/i486, GCC will allocate
6716 8 bytes for the structure shown above. It decides to do this based upon
6717 one simple rule for bit-field allocation. Quite simply, GCC allocates
6718 each "containing object" for each bit-field at the first (i.e. lowest
6719 addressed) legitimate alignment boundary (based upon the required
6720 minimum alignment for the declared type of the field) which it can
6721 possibly use, subject to the condition that there is still enough
6722 available space remaining in the containing object (when allocated at
6723 the selected point) to fully accommodate all of the bits of the
6724 bit-field itself. This simple rule makes it obvious why GCC allocates
6725 8 bytes for each object of the structure type shown above. When looking
6726 for a place to allocate the "containing object" for `field2', the
6727 compiler simply tries to allocate a 64-bit "containing object" at each
6728 successive 32-bit boundary (starting at zero) until it finds a place to
6729 allocate that 64- bit field such that at least 31 contiguous (and
6730 previously unallocated) bits remain within that selected 64 bit field.
6731 (As it turns out, for the example above, the compiler finds that it is
6732 OK to allocate the "containing object" 64-bit field at bit-offset zero
6733 within the structure type.) Here we attempt to work backwards from the
6734 limited set of facts we're given, and we try to deduce from those facts,
6735 where GCC must have believed that the containing object started (within
6736 the structure type). The value we deduce is then used (by the callers of
6737 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6738 for fields (both bit-fields and, in the case of DW_AT_location, regular
6741 /* Figure out the bit-distance from the start of the structure to the
6742 "deepest" bit of the bit-field. */
6743 deepest_bitpos = bitpos_int + field_size_in_bits;
6745 /* This is the tricky part. Use some fancy footwork to deduce where the
6746 lowest addressed bit of the containing object must be. */
6747 object_offset_in_bits
6748 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6750 /* Compute the offset of the containing object in "alignment units". */
6751 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6753 /* Compute the offset of the containing object in bytes. */
6754 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6756 return object_offset_in_bytes;
6759 /* The following routines define various Dwarf attributes and any data
6760 associated with them. */
6762 /* Add a location description attribute value to a DIE.
6764 This emits location attributes suitable for whole variables and
6765 whole parameters. Note that the location attributes for struct fields are
6766 generated by the routine `data_member_location_attribute' below. */
6769 add_AT_location_description (die, attr_kind, rtl)
6771 enum dwarf_attribute attr_kind;
6774 /* Handle a special case. If we are about to output a location descriptor
6775 for a variable or parameter which has been optimized out of existence,
6776 don't do that. A variable which has been optimized out
6777 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6778 Currently, in some rare cases, variables can have DECL_RTL values which
6779 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6780 elsewhere in the compiler. We treat such cases as if the variable(s) in
6781 question had been optimized out of existence. */
6783 if (is_pseudo_reg (rtl)
6784 || (GET_CODE (rtl) == MEM
6785 && is_pseudo_reg (XEXP (rtl, 0)))
6786 || (GET_CODE (rtl) == CONCAT
6787 && is_pseudo_reg (XEXP (rtl, 0))
6788 && is_pseudo_reg (XEXP (rtl, 1))))
6791 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6794 /* Attach the specialized form of location attribute used for data
6795 members of struct and union types. In the special case of a
6796 FIELD_DECL node which represents a bit-field, the "offset" part
6797 of this special location descriptor must indicate the distance
6798 in bytes from the lowest-addressed byte of the containing struct
6799 or union type to the lowest-addressed byte of the "containing
6800 object" for the bit-field. (See the `field_byte_offset' function
6801 above).. For any given bit-field, the "containing object" is a
6802 hypothetical object (of some integral or enum type) within which
6803 the given bit-field lives. The type of this hypothetical
6804 "containing object" is always the same as the declared type of
6805 the individual bit-field itself (for GCC anyway... the DWARF
6806 spec doesn't actually mandate this). Note that it is the size
6807 (in bytes) of the hypothetical "containing object" which will
6808 be given in the DW_AT_byte_size attribute for this bit-field.
6809 (See the `byte_size_attribute' function below.) It is also used
6810 when calculating the value of the DW_AT_bit_offset attribute.
6811 (See the `bit_offset_attribute' function below). */
6814 add_data_member_location_attribute (die, decl)
6815 register dw_die_ref die;
6818 register unsigned long offset;
6819 register dw_loc_descr_ref loc_descr;
6820 register enum dwarf_location_atom op;
6822 if (TREE_CODE (decl) == TREE_VEC)
6823 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6825 offset = field_byte_offset (decl);
6827 /* The DWARF2 standard says that we should assume that the structure address
6828 is already on the stack, so we can specify a structure field address
6829 by using DW_OP_plus_uconst. */
6831 #ifdef MIPS_DEBUGGING_INFO
6832 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6833 correctly. It works only if we leave the offset on the stack. */
6836 op = DW_OP_plus_uconst;
6839 loc_descr = new_loc_descr (op, offset, 0);
6840 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
6843 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6844 does not have a "location" either in memory or in a register. These
6845 things can arise in GNU C when a constant is passed as an actual parameter
6846 to an inlined function. They can also arise in C++ where declared
6847 constants do not necessarily get memory "homes". */
6850 add_const_value_attribute (die, rtl)
6851 register dw_die_ref die;
6854 switch (GET_CODE (rtl))
6857 /* Note that a CONST_INT rtx could represent either an integer or a
6858 floating-point constant. A CONST_INT is used whenever the constant
6859 will fit into a single word. In all such cases, the original mode
6860 of the constant value is wiped out, and the CONST_INT rtx is
6861 assigned VOIDmode. */
6862 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
6866 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6867 floating-point constant. A CONST_DOUBLE is used whenever the
6868 constant requires more than one word in order to be adequately
6869 represented. We output CONST_DOUBLEs as blocks. */
6871 register enum machine_mode mode = GET_MODE (rtl);
6873 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
6875 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
6879 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
6883 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
6887 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
6892 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
6899 add_AT_float (die, DW_AT_const_value, length, array);
6902 add_AT_long_long (die, DW_AT_const_value,
6903 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
6908 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
6914 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
6918 /* In cases where an inlined instance of an inline function is passed
6919 the address of an `auto' variable (which is local to the caller) we
6920 can get a situation where the DECL_RTL of the artificial local
6921 variable (for the inlining) which acts as a stand-in for the
6922 corresponding formal parameter (of the inline function) will look
6923 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6924 exactly a compile-time constant expression, but it isn't the address
6925 of the (artificial) local variable either. Rather, it represents the
6926 *value* which the artificial local variable always has during its
6927 lifetime. We currently have no way to represent such quasi-constant
6928 values in Dwarf, so for now we just punt and generate nothing. */
6932 /* No other kinds of rtx should be possible here. */
6938 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6939 data attribute for a variable or a parameter. We generate the
6940 DW_AT_const_value attribute only in those cases where the given variable
6941 or parameter does not have a true "location" either in memory or in a
6942 register. This can happen (for example) when a constant is passed as an
6943 actual argument in a call to an inline function. (It's possible that
6944 these things can crop up in other ways also.) Note that one type of
6945 constant value which can be passed into an inlined function is a constant
6946 pointer. This can happen for example if an actual argument in an inlined
6947 function call evaluates to a compile-time constant address. */
6950 add_location_or_const_value_attribute (die, decl)
6951 register dw_die_ref die;
6955 register tree declared_type;
6956 register tree passed_type;
6958 if (TREE_CODE (decl) == ERROR_MARK)
6961 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
6964 /* Here we have to decide where we are going to say the parameter "lives"
6965 (as far as the debugger is concerned). We only have a couple of
6966 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6968 DECL_RTL normally indicates where the parameter lives during most of the
6969 activation of the function. If optimization is enabled however, this
6970 could be either NULL or else a pseudo-reg. Both of those cases indicate
6971 that the parameter doesn't really live anywhere (as far as the code
6972 generation parts of GCC are concerned) during most of the function's
6973 activation. That will happen (for example) if the parameter is never
6974 referenced within the function.
6976 We could just generate a location descriptor here for all non-NULL
6977 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6978 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6979 where DECL_RTL is NULL or is a pseudo-reg.
6981 Note however that we can only get away with using DECL_INCOMING_RTL as
6982 a backup substitute for DECL_RTL in certain limited cases. In cases
6983 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
6984 we can be sure that the parameter was passed using the same type as it is
6985 declared to have within the function, and that its DECL_INCOMING_RTL
6986 points us to a place where a value of that type is passed.
6988 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
6989 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
6990 because in these cases DECL_INCOMING_RTL points us to a value of some
6991 type which is *different* from the type of the parameter itself. Thus,
6992 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
6993 such cases, the debugger would end up (for example) trying to fetch a
6994 `float' from a place which actually contains the first part of a
6995 `double'. That would lead to really incorrect and confusing
6996 output at debug-time.
6998 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
6999 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7000 are a couple of exceptions however. On little-endian machines we can
7001 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7002 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7003 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7004 when (on a little-endian machine) a non-prototyped function has a
7005 parameter declared to be of type `short' or `char'. In such cases,
7006 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7007 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7008 passed `int' value. If the debugger then uses that address to fetch
7009 a `short' or a `char' (on a little-endian machine) the result will be
7010 the correct data, so we allow for such exceptional cases below.
7012 Note that our goal here is to describe the place where the given formal
7013 parameter lives during most of the function's activation (i.e. between
7014 the end of the prologue and the start of the epilogue). We'll do that
7015 as best as we can. Note however that if the given formal parameter is
7016 modified sometime during the execution of the function, then a stack
7017 backtrace (at debug-time) will show the function as having been
7018 called with the *new* value rather than the value which was
7019 originally passed in. This happens rarely enough that it is not
7020 a major problem, but it *is* a problem, and I'd like to fix it.
7022 A future version of dwarf2out.c may generate two additional
7023 attributes for any given DW_TAG_formal_parameter DIE which will
7024 describe the "passed type" and the "passed location" for the
7025 given formal parameter in addition to the attributes we now
7026 generate to indicate the "declared type" and the "active
7027 location" for each parameter. This additional set of attributes
7028 could be used by debuggers for stack backtraces. Separately, note
7029 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7030 NULL also. This happens (for example) for inlined-instances of
7031 inline function formal parameters which are never referenced.
7032 This really shouldn't be happening. All PARM_DECL nodes should
7033 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7034 doesn't currently generate these values for inlined instances of
7035 inline function parameters, so when we see such cases, we are
7036 just out-of-luck for the time being (until integrate.c
7039 /* Use DECL_RTL as the "location" unless we find something better. */
7040 rtl = DECL_RTL (decl);
7042 if (TREE_CODE (decl) == PARM_DECL)
7044 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7046 declared_type = type_main_variant (TREE_TYPE (decl));
7047 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7049 /* This decl represents a formal parameter which was optimized out.
7050 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7051 all* cases where (rtl == NULL_RTX) just below. */
7052 if (declared_type == passed_type)
7053 rtl = DECL_INCOMING_RTL (decl);
7054 else if (! BYTES_BIG_ENDIAN
7055 && TREE_CODE (declared_type) == INTEGER_TYPE
7056 && TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
7057 rtl = DECL_INCOMING_RTL (decl);
7061 if (rtl == NULL_RTX)
7064 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7065 #ifdef LEAF_REG_REMAP
7067 leaf_renumber_regs_insn (rtl);
7070 switch (GET_CODE (rtl))
7073 /* The address of a variable that was optimized away; don't emit
7084 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7085 add_const_value_attribute (die, rtl);
7092 add_AT_location_description (die, DW_AT_location, rtl);
7100 /* Generate an DW_AT_name attribute given some string value to be included as
7101 the value of the attribute. */
7104 add_name_attribute (die, name_string)
7105 register dw_die_ref die;
7106 register char *name_string;
7108 if (name_string != NULL && *name_string != 0)
7109 add_AT_string (die, DW_AT_name, name_string);
7112 /* Given a tree node describing an array bound (either lower or upper) output
7113 a representation for that bound. */
7116 add_bound_info (subrange_die, bound_attr, bound)
7117 register dw_die_ref subrange_die;
7118 register enum dwarf_attribute bound_attr;
7119 register tree bound;
7121 register unsigned bound_value = 0;
7123 /* If this is an Ada unconstrained array type, then don't emit any debug
7124 info because the array bounds are unknown. They are parameterized when
7125 the type is instantiated. */
7126 if (contains_placeholder_p (bound))
7129 switch (TREE_CODE (bound))
7134 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7136 bound_value = TREE_INT_CST_LOW (bound);
7137 if (bound_attr == DW_AT_lower_bound
7138 && ((is_c_family () && bound_value == 0)
7139 || (is_fortran () && bound_value == 1)))
7140 /* use the default */;
7142 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7147 case NON_LVALUE_EXPR:
7148 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7152 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7153 access the upper bound values may be bogus. If they refer to a
7154 register, they may only describe how to get at these values at the
7155 points in the generated code right after they have just been
7156 computed. Worse yet, in the typical case, the upper bound values
7157 will not even *be* computed in the optimized code (though the
7158 number of elements will), so these SAVE_EXPRs are entirely
7159 bogus. In order to compensate for this fact, we check here to see
7160 if optimization is enabled, and if so, we don't add an attribute
7161 for the (unknown and unknowable) upper bound. This should not
7162 cause too much trouble for existing (stupid?) debuggers because
7163 they have to deal with empty upper bounds location descriptions
7164 anyway in order to be able to deal with incomplete array types.
7165 Of course an intelligent debugger (GDB?) should be able to
7166 comprehend that a missing upper bound specification in a array
7167 type used for a storage class `auto' local array variable
7168 indicates that the upper bound is both unknown (at compile- time)
7169 and unknowable (at run-time) due to optimization.
7171 We assume that a MEM rtx is safe because gcc wouldn't put the
7172 value there unless it was going to be used repeatedly in the
7173 function, i.e. for cleanups. */
7174 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7176 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7177 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7178 register rtx loc = SAVE_EXPR_RTL (bound);
7180 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7181 it references an outer function's frame. */
7183 if (GET_CODE (loc) == MEM)
7185 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7187 if (XEXP (loc, 0) != new_addr)
7188 loc = gen_rtx (MEM, GET_MODE (loc), new_addr);
7191 add_AT_flag (decl_die, DW_AT_artificial, 1);
7192 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7193 add_AT_location_description (decl_die, DW_AT_location, loc);
7194 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7197 /* Else leave out the attribute. */
7203 /* ??? These types of bounds can be created by the Ada front end,
7204 and it isn't clear how to emit debug info for them. */
7212 /* Note that the block of subscript information for an array type also
7213 includes information about the element type of type given array type. */
7216 add_subscript_info (type_die, type)
7217 register dw_die_ref type_die;
7220 #ifndef MIPS_DEBUGGING_INFO
7221 register unsigned dimension_number;
7223 register tree lower, upper;
7224 register dw_die_ref subrange_die;
7226 /* The GNU compilers represent multidimensional array types as sequences of
7227 one dimensional array types whose element types are themselves array
7228 types. Here we squish that down, so that each multidimensional array
7229 type gets only one array_type DIE in the Dwarf debugging info. The draft
7230 Dwarf specification say that we are allowed to do this kind of
7231 compression in C (because there is no difference between an array or
7232 arrays and a multidimensional array in C) but for other source languages
7233 (e.g. Ada) we probably shouldn't do this. */
7235 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7236 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7237 We work around this by disabling this feature. See also
7238 gen_array_type_die. */
7239 #ifndef MIPS_DEBUGGING_INFO
7240 for (dimension_number = 0;
7241 TREE_CODE (type) == ARRAY_TYPE;
7242 type = TREE_TYPE (type), dimension_number++)
7245 register tree domain = TYPE_DOMAIN (type);
7247 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7248 and (in GNU C only) variable bounds. Handle all three forms
7250 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7253 /* We have an array type with specified bounds. */
7254 lower = TYPE_MIN_VALUE (domain);
7255 upper = TYPE_MAX_VALUE (domain);
7257 /* define the index type. */
7258 if (TREE_TYPE (domain))
7260 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7261 TREE_TYPE field. We can't emit debug info for this
7262 because it is an unnamed integral type. */
7263 if (TREE_CODE (domain) == INTEGER_TYPE
7264 && TYPE_NAME (domain) == NULL_TREE
7265 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7266 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7269 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7273 /* ??? If upper is NULL, the array has unspecified length,
7274 but it does have a lower bound. This happens with Fortran
7276 Since the debugger is definitely going to need to know N
7277 to produce useful results, go ahead and output the lower
7278 bound solo, and hope the debugger can cope. */
7280 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7282 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7285 /* We have an array type with an unspecified length. The DWARF-2
7286 spec does not say how to handle this; let's just leave out the
7291 #ifndef MIPS_DEBUGGING_INFO
7297 add_byte_size_attribute (die, tree_node)
7299 register tree tree_node;
7301 register unsigned size;
7303 switch (TREE_CODE (tree_node))
7311 case QUAL_UNION_TYPE:
7312 size = int_size_in_bytes (tree_node);
7315 /* For a data member of a struct or union, the DW_AT_byte_size is
7316 generally given as the number of bytes normally allocated for an
7317 object of the *declared* type of the member itself. This is true
7318 even for bit-fields. */
7319 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7325 /* Note that `size' might be -1 when we get to this point. If it is, that
7326 indicates that the byte size of the entity in question is variable. We
7327 have no good way of expressing this fact in Dwarf at the present time,
7328 so just let the -1 pass on through. */
7330 add_AT_unsigned (die, DW_AT_byte_size, size);
7333 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7334 which specifies the distance in bits from the highest order bit of the
7335 "containing object" for the bit-field to the highest order bit of the
7338 For any given bit-field, the "containing object" is a hypothetical
7339 object (of some integral or enum type) within which the given bit-field
7340 lives. The type of this hypothetical "containing object" is always the
7341 same as the declared type of the individual bit-field itself. The
7342 determination of the exact location of the "containing object" for a
7343 bit-field is rather complicated. It's handled by the
7344 `field_byte_offset' function (above).
7346 Note that it is the size (in bytes) of the hypothetical "containing object"
7347 which will be given in the DW_AT_byte_size attribute for this bit-field.
7348 (See `byte_size_attribute' above). */
7351 add_bit_offset_attribute (die, decl)
7352 register dw_die_ref die;
7355 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7356 register tree type = DECL_BIT_FIELD_TYPE (decl);
7357 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7358 register unsigned bitpos_int;
7359 register unsigned highest_order_object_bit_offset;
7360 register unsigned highest_order_field_bit_offset;
7361 register unsigned bit_offset;
7363 /* Must be a field and a bit field. */
7365 || TREE_CODE (decl) != FIELD_DECL)
7368 /* We can't yet handle bit-fields whose offsets are variable, so if we
7369 encounter such things, just return without generating any attribute
7371 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7374 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7376 /* Note that the bit offset is always the distance (in bits) from the
7377 highest-order bit of the "containing object" to the highest-order bit of
7378 the bit-field itself. Since the "high-order end" of any object or field
7379 is different on big-endian and little-endian machines, the computation
7380 below must take account of these differences. */
7381 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7382 highest_order_field_bit_offset = bitpos_int;
7384 if (! BYTES_BIG_ENDIAN)
7386 highest_order_field_bit_offset
7387 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7389 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7393 = (! BYTES_BIG_ENDIAN
7394 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7395 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7397 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7400 /* For a FIELD_DECL node which represents a bit field, output an attribute
7401 which specifies the length in bits of the given field. */
7404 add_bit_size_attribute (die, decl)
7405 register dw_die_ref die;
7408 /* Must be a field and a bit field. */
7409 if (TREE_CODE (decl) != FIELD_DECL
7410 || ! DECL_BIT_FIELD_TYPE (decl))
7412 add_AT_unsigned (die, DW_AT_bit_size,
7413 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7416 /* If the compiled language is ANSI C, then add a 'prototyped'
7417 attribute, if arg types are given for the parameters of a function. */
7420 add_prototyped_attribute (die, func_type)
7421 register dw_die_ref die;
7422 register tree func_type;
7424 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7425 && TYPE_ARG_TYPES (func_type) != NULL)
7426 add_AT_flag (die, DW_AT_prototyped, 1);
7430 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7431 by looking in either the type declaration or object declaration
7435 add_abstract_origin_attribute (die, origin)
7436 register dw_die_ref die;
7437 register tree origin;
7439 dw_die_ref origin_die = NULL;
7440 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7441 origin_die = lookup_decl_die (origin);
7442 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7443 origin_die = lookup_type_die (origin);
7445 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7448 /* We do not currently support the pure_virtual attribute. */
7451 add_pure_or_virtual_attribute (die, func_decl)
7452 register dw_die_ref die;
7453 register tree func_decl;
7455 if (DECL_VINDEX (func_decl))
7457 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7458 add_AT_loc (die, DW_AT_vtable_elem_location,
7459 new_loc_descr (DW_OP_constu,
7460 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7463 /* GNU extension: Record what type this method came from originally. */
7464 if (debug_info_level > DINFO_LEVEL_TERSE)
7465 add_AT_die_ref (die, DW_AT_containing_type,
7466 lookup_type_die (DECL_CONTEXT (func_decl)));
7470 /* Add source coordinate attributes for the given decl. */
7473 add_src_coords_attributes (die, decl)
7474 register dw_die_ref die;
7477 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7479 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7480 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7483 /* Add an DW_AT_name attribute and source coordinate attribute for the
7484 given decl, but only if it actually has a name. */
7487 add_name_and_src_coords_attributes (die, decl)
7488 register dw_die_ref die;
7491 register tree decl_name;
7493 decl_name = DECL_NAME (decl);
7494 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7496 add_name_attribute (die, dwarf2_name (decl, 0));
7497 add_src_coords_attributes (die, decl);
7498 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7499 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7500 add_AT_string (die, DW_AT_MIPS_linkage_name,
7501 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7505 /* Push a new declaration scope. */
7508 push_decl_scope (scope)
7511 tree containing_scope;
7514 /* Make room in the decl_scope_table, if necessary. */
7515 if (decl_scope_table_allocated == decl_scope_depth)
7517 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7519 = (decl_scope_node *) xrealloc (decl_scope_table,
7520 (decl_scope_table_allocated
7521 * sizeof (decl_scope_node)));
7524 decl_scope_table[decl_scope_depth].scope = scope;
7526 /* Sometimes, while recursively emitting subtypes within a class type,
7527 we end up recuring on a subtype at a higher level then the current
7528 subtype. In such a case, we need to search the decl_scope_table to
7529 find the parent of this subtype. */
7531 if (TREE_CODE_CLASS (TREE_CODE (scope)) == 't')
7532 containing_scope = TYPE_CONTEXT (scope);
7534 containing_scope = NULL_TREE;
7536 /* The normal case. */
7537 if (decl_scope_depth == 0
7538 || containing_scope == NULL_TREE
7539 /* Ignore namespaces for the moment. */
7540 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7541 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7542 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7545 /* We need to search for the containing_scope. */
7546 for (i = 0; i < decl_scope_depth; i++)
7547 if (decl_scope_table[i].scope == containing_scope)
7550 if (i == decl_scope_depth)
7553 decl_scope_table[decl_scope_depth].previous = i;
7559 /* Return the DIE for the scope that immediately contains this declaration. */
7562 scope_die_for (t, context_die)
7564 register dw_die_ref context_die;
7566 register dw_die_ref scope_die = NULL;
7567 register tree containing_scope;
7570 /* Walk back up the declaration tree looking for a place to define
7572 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7573 containing_scope = TYPE_CONTEXT (t);
7574 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7575 containing_scope = decl_class_context (t);
7577 containing_scope = DECL_CONTEXT (t);
7579 /* Ignore namespaces for the moment. */
7580 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7581 containing_scope = NULL_TREE;
7583 /* Function-local tags and functions get stuck in limbo until they are
7584 fixed up by decls_for_scope. */
7585 if (context_die == NULL && containing_scope != NULL_TREE
7586 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7589 if (containing_scope == NULL_TREE)
7590 scope_die = comp_unit_die;
7593 for (i = decl_scope_depth - 1, scope_die = context_die;
7594 i >= 0 && decl_scope_table[i].scope != containing_scope;
7595 (scope_die = scope_die->die_parent,
7596 i = decl_scope_table[i].previous))
7599 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7600 does it try to handle types defined by TYPE_DECLs. Such types
7601 thus have an incorrect TYPE_CONTEXT, which points to the block
7602 they were originally defined in, instead of the current block
7603 created by function inlining. We try to detect that here and
7606 if (i < 0 && scope_die == comp_unit_die
7607 && TREE_CODE (containing_scope) == BLOCK
7608 && is_tagged_type (t)
7609 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7610 == containing_scope))
7612 scope_die = context_die;
7613 /* Since the checks below are no longer applicable. */
7619 if (scope_die != comp_unit_die
7620 || TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7622 if (debug_info_level > DINFO_LEVEL_TERSE
7623 && !TREE_ASM_WRITTEN (containing_scope))
7631 /* Pop a declaration scope. */
7635 if (decl_scope_depth <= 0)
7640 /* Many forms of DIEs require a "type description" attribute. This
7641 routine locates the proper "type descriptor" die for the type given
7642 by 'type', and adds an DW_AT_type attribute below the given die. */
7645 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7646 register dw_die_ref object_die;
7648 register int decl_const;
7649 register int decl_volatile;
7650 register dw_die_ref context_die;
7652 register enum tree_code code = TREE_CODE (type);
7653 register dw_die_ref type_die = NULL;
7655 /* ??? If this type is an unnamed subrange type of an integral or
7656 floating-point type, use the inner type. This is because we have no
7657 support for unnamed types in base_type_die. This can happen if this is
7658 an Ada subrange type. Correct solution is emit a subrange type die. */
7659 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7660 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7661 type = TREE_TYPE (type), code = TREE_CODE (type);
7663 if (code == ERROR_MARK)
7666 /* Handle a special case. For functions whose return type is void, we
7667 generate *no* type attribute. (Note that no object may have type
7668 `void', so this only applies to function return types). */
7669 if (code == VOID_TYPE)
7672 type_die = modified_type_die (type,
7673 decl_const || TYPE_READONLY (type),
7674 decl_volatile || TYPE_VOLATILE (type),
7676 if (type_die != NULL)
7677 add_AT_die_ref (object_die, DW_AT_type, type_die);
7680 /* Given a tree pointer to a struct, class, union, or enum type node, return
7681 a pointer to the (string) tag name for the given type, or zero if the type
7682 was declared without a tag. */
7688 register char *name = 0;
7690 if (TYPE_NAME (type) != 0)
7692 register tree t = 0;
7694 /* Find the IDENTIFIER_NODE for the type name. */
7695 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7696 t = TYPE_NAME (type);
7698 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7699 a TYPE_DECL node, regardless of whether or not a `typedef' was
7701 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7702 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7703 t = DECL_NAME (TYPE_NAME (type));
7705 /* Now get the name as a string, or invent one. */
7707 name = IDENTIFIER_POINTER (t);
7710 return (name == 0 || *name == '\0') ? 0 : name;
7713 /* Return the type associated with a data member, make a special check
7714 for bit field types. */
7717 member_declared_type (member)
7718 register tree member;
7720 return (DECL_BIT_FIELD_TYPE (member)
7721 ? DECL_BIT_FIELD_TYPE (member)
7722 : TREE_TYPE (member));
7725 /* Get the decl's label, as described by its RTL. This may be different
7726 from the DECL_NAME name used in the source file. */
7729 decl_start_label (decl)
7734 x = DECL_RTL (decl);
7735 if (GET_CODE (x) != MEM)
7739 if (GET_CODE (x) != SYMBOL_REF)
7742 fnname = XSTR (x, 0);
7746 /* These routines generate the internal representation of the DIE's for
7747 the compilation unit. Debugging information is collected by walking
7748 the declaration trees passed in from dwarf2out_decl(). */
7751 gen_array_type_die (type, context_die)
7753 register dw_die_ref context_die;
7755 register dw_die_ref scope_die = scope_die_for (type, context_die);
7756 register dw_die_ref array_die;
7757 register tree element_type;
7759 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7760 the inner array type comes before the outer array type. Thus we must
7761 call gen_type_die before we call new_die. See below also. */
7762 #ifdef MIPS_DEBUGGING_INFO
7763 gen_type_die (TREE_TYPE (type), context_die);
7766 array_die = new_die (DW_TAG_array_type, scope_die);
7769 /* We default the array ordering. SDB will probably do
7770 the right things even if DW_AT_ordering is not present. It's not even
7771 an issue until we start to get into multidimensional arrays anyway. If
7772 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7773 then we'll have to put the DW_AT_ordering attribute back in. (But if
7774 and when we find out that we need to put these in, we will only do so
7775 for multidimensional arrays. */
7776 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
7779 #ifdef MIPS_DEBUGGING_INFO
7780 /* The SGI compilers handle arrays of unknown bound by setting
7781 AT_declaration and not emitting any subrange DIEs. */
7782 if (! TYPE_DOMAIN (type))
7783 add_AT_unsigned (array_die, DW_AT_declaration, 1);
7786 add_subscript_info (array_die, type);
7788 equate_type_number_to_die (type, array_die);
7790 /* Add representation of the type of the elements of this array type. */
7791 element_type = TREE_TYPE (type);
7793 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7794 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7795 We work around this by disabling this feature. See also
7796 add_subscript_info. */
7797 #ifndef MIPS_DEBUGGING_INFO
7798 while (TREE_CODE (element_type) == ARRAY_TYPE)
7799 element_type = TREE_TYPE (element_type);
7801 gen_type_die (element_type, context_die);
7804 add_type_attribute (array_die, element_type, 0, 0, context_die);
7808 gen_set_type_die (type, context_die)
7810 register dw_die_ref context_die;
7812 register dw_die_ref type_die
7813 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
7815 equate_type_number_to_die (type, type_die);
7816 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
7820 gen_entry_point_die (decl, context_die)
7822 register dw_die_ref context_die;
7824 register tree origin = decl_ultimate_origin (decl);
7825 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
7827 add_abstract_origin_attribute (decl_die, origin);
7830 add_name_and_src_coords_attributes (decl_die, decl);
7831 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
7835 if (DECL_ABSTRACT (decl))
7836 equate_decl_number_to_die (decl, decl_die);
7838 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
7841 /* Remember a type in the pending_types_list. */
7847 if (pending_types == pending_types_allocated)
7849 pending_types_allocated += PENDING_TYPES_INCREMENT;
7851 = (tree *) xrealloc (pending_types_list,
7852 sizeof (tree) * pending_types_allocated);
7855 pending_types_list[pending_types++] = type;
7858 /* Output any pending types (from the pending_types list) which we can output
7859 now (taking into account the scope that we are working on now).
7861 For each type output, remove the given type from the pending_types_list
7862 *before* we try to output it. */
7865 output_pending_types_for_scope (context_die)
7866 register dw_die_ref context_die;
7870 while (pending_types)
7873 type = pending_types_list[pending_types];
7874 gen_type_die (type, context_die);
7875 if (!TREE_ASM_WRITTEN (type))
7880 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7883 gen_inlined_enumeration_type_die (type, context_die)
7885 register dw_die_ref context_die;
7887 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
7888 scope_die_for (type, context_die));
7890 if (!TREE_ASM_WRITTEN (type))
7892 add_abstract_origin_attribute (type_die, type);
7895 /* Generate a DIE to represent an inlined instance of a structure type. */
7898 gen_inlined_structure_type_die (type, context_die)
7900 register dw_die_ref context_die;
7902 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
7903 scope_die_for (type, context_die));
7905 if (!TREE_ASM_WRITTEN (type))
7907 add_abstract_origin_attribute (type_die, type);
7910 /* Generate a DIE to represent an inlined instance of a union type. */
7913 gen_inlined_union_type_die (type, context_die)
7915 register dw_die_ref context_die;
7917 register dw_die_ref type_die = new_die (DW_TAG_union_type,
7918 scope_die_for (type, context_die));
7920 if (!TREE_ASM_WRITTEN (type))
7922 add_abstract_origin_attribute (type_die, type);
7925 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7926 include all of the information about the enumeration values also. Each
7927 enumerated type name/value is listed as a child of the enumerated type
7931 gen_enumeration_type_die (type, context_die)
7933 register dw_die_ref context_die;
7935 register dw_die_ref type_die = lookup_type_die (type);
7937 if (type_die == NULL)
7939 type_die = new_die (DW_TAG_enumeration_type,
7940 scope_die_for (type, context_die));
7941 equate_type_number_to_die (type, type_die);
7942 add_name_attribute (type_die, type_tag (type));
7944 else if (! TYPE_SIZE (type))
7947 remove_AT (type_die, DW_AT_declaration);
7949 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7950 given enum type is incomplete, do not generate the DW_AT_byte_size
7951 attribute or the DW_AT_element_list attribute. */
7952 if (TYPE_SIZE (type))
7956 TREE_ASM_WRITTEN (type) = 1;
7957 add_byte_size_attribute (type_die, type);
7958 if (TYPE_STUB_DECL (type) != NULL_TREE)
7959 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
7961 /* If the first reference to this type was as the return type of an
7962 inline function, then it may not have a parent. Fix this now. */
7963 if (type_die->die_parent == NULL)
7964 add_child_die (scope_die_for (type, context_die), type_die);
7966 for (link = TYPE_FIELDS (type);
7967 link != NULL; link = TREE_CHAIN (link))
7969 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
7971 add_name_attribute (enum_die,
7972 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
7973 add_AT_unsigned (enum_die, DW_AT_const_value,
7974 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
7978 add_AT_flag (type_die, DW_AT_declaration, 1);
7982 /* Generate a DIE to represent either a real live formal parameter decl or to
7983 represent just the type of some formal parameter position in some function
7986 Note that this routine is a bit unusual because its argument may be a
7987 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
7988 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
7989 node. If it's the former then this function is being called to output a
7990 DIE to represent a formal parameter object (or some inlining thereof). If
7991 it's the latter, then this function is only being called to output a
7992 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
7993 argument type of some subprogram type. */
7996 gen_formal_parameter_die (node, context_die)
7998 register dw_die_ref context_die;
8000 register dw_die_ref parm_die
8001 = new_die (DW_TAG_formal_parameter, context_die);
8002 register tree origin;
8004 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8007 origin = decl_ultimate_origin (node);
8009 add_abstract_origin_attribute (parm_die, origin);
8012 add_name_and_src_coords_attributes (parm_die, node);
8013 add_type_attribute (parm_die, TREE_TYPE (node),
8014 TREE_READONLY (node),
8015 TREE_THIS_VOLATILE (node),
8017 if (DECL_ARTIFICIAL (node))
8018 add_AT_flag (parm_die, DW_AT_artificial, 1);
8021 equate_decl_number_to_die (node, parm_die);
8022 if (! DECL_ABSTRACT (node))
8023 add_location_or_const_value_attribute (parm_die, node);
8028 /* We were called with some kind of a ..._TYPE node. */
8029 add_type_attribute (parm_die, node, 0, 0, context_die);
8039 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8040 at the end of an (ANSI prototyped) formal parameters list. */
8043 gen_unspecified_parameters_die (decl_or_type, context_die)
8044 register tree decl_or_type;
8045 register dw_die_ref context_die;
8047 register dw_die_ref parm_die = new_die (DW_TAG_unspecified_parameters,
8051 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8052 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8053 parameters as specified in some function type specification (except for
8054 those which appear as part of a function *definition*).
8056 Note we must be careful here to output all of the parameter DIEs before*
8057 we output any DIEs needed to represent the types of the formal parameters.
8058 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8059 non-parameter DIE it sees ends the formal parameter list. */
8062 gen_formal_types_die (function_or_method_type, context_die)
8063 register tree function_or_method_type;
8064 register dw_die_ref context_die;
8067 register tree formal_type = NULL;
8068 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8071 /* In the case where we are generating a formal types list for a C++
8072 non-static member function type, skip over the first thing on the
8073 TYPE_ARG_TYPES list because it only represents the type of the hidden
8074 `this pointer'. The debugger should be able to figure out (without
8075 being explicitly told) that this non-static member function type takes a
8076 `this pointer' and should be able to figure what the type of that hidden
8077 parameter is from the DW_AT_member attribute of the parent
8078 DW_TAG_subroutine_type DIE. */
8079 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8080 first_parm_type = TREE_CHAIN (first_parm_type);
8083 /* Make our first pass over the list of formal parameter types and output a
8084 DW_TAG_formal_parameter DIE for each one. */
8085 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8087 register dw_die_ref parm_die;
8089 formal_type = TREE_VALUE (link);
8090 if (formal_type == void_type_node)
8093 /* Output a (nameless) DIE to represent the formal parameter itself. */
8094 parm_die = gen_formal_parameter_die (formal_type, context_die);
8095 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8096 && link == first_parm_type)
8097 add_AT_flag (parm_die, DW_AT_artificial, 1);
8100 /* If this function type has an ellipsis, add a
8101 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8102 if (formal_type != void_type_node)
8103 gen_unspecified_parameters_die (function_or_method_type, context_die);
8105 /* Make our second (and final) pass over the list of formal parameter types
8106 and output DIEs to represent those types (as necessary). */
8107 for (link = TYPE_ARG_TYPES (function_or_method_type);
8109 link = TREE_CHAIN (link))
8111 formal_type = TREE_VALUE (link);
8112 if (formal_type == void_type_node)
8115 gen_type_die (formal_type, context_die);
8119 /* Generate a DIE to represent a declared function (either file-scope or
8123 gen_subprogram_die (decl, context_die)
8125 register dw_die_ref context_die;
8127 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8128 register tree origin = decl_ultimate_origin (decl);
8129 register dw_die_ref subr_die;
8130 register rtx fp_reg;
8131 register tree fn_arg_types;
8132 register tree outer_scope;
8133 register dw_die_ref old_die = lookup_decl_die (decl);
8134 register int declaration
8135 = (current_function_decl != decl
8137 && (context_die->die_tag == DW_TAG_structure_type
8138 || context_die->die_tag == DW_TAG_union_type)));
8142 subr_die = new_die (DW_TAG_subprogram, context_die);
8143 add_abstract_origin_attribute (subr_die, origin);
8145 else if (old_die && DECL_ABSTRACT (decl)
8146 && get_AT_unsigned (old_die, DW_AT_inline))
8148 /* This must be a redefinition of an extern inline function.
8149 We can just reuse the old die here. */
8152 /* Clear out the inlined attribute and parm types. */
8153 remove_AT (subr_die, DW_AT_inline);
8154 remove_children (subr_die);
8158 register unsigned file_index
8159 = lookup_filename (DECL_SOURCE_FILE (decl));
8161 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8164 /* If the definition comes from the same place as the declaration,
8165 maybe use the old DIE. We always want the DIE for this function
8166 that has the *_pc attributes to be under comp_unit_die so the
8167 debugger can find it. For inlines, that is the concrete instance,
8168 so we can use the old DIE here. For non-inline methods, we want a
8169 specification DIE at toplevel, so we need a new DIE. For local
8170 class methods, this does not apply. */
8171 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8172 || context_die == NULL)
8173 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8174 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8175 == DECL_SOURCE_LINE (decl)))
8179 /* Clear out the declaration attribute and the parm types. */
8180 remove_AT (subr_die, DW_AT_declaration);
8181 remove_children (subr_die);
8185 subr_die = new_die (DW_TAG_subprogram, context_die);
8186 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8187 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8188 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8189 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8190 != DECL_SOURCE_LINE (decl))
8192 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8197 register dw_die_ref scope_die;
8199 if (DECL_CONTEXT (decl))
8200 scope_die = scope_die_for (decl, context_die);
8202 /* Don't put block extern declarations under comp_unit_die. */
8203 scope_die = context_die;
8205 subr_die = new_die (DW_TAG_subprogram, scope_die);
8207 if (TREE_PUBLIC (decl))
8208 add_AT_flag (subr_die, DW_AT_external, 1);
8210 add_name_and_src_coords_attributes (subr_die, decl);
8211 if (debug_info_level > DINFO_LEVEL_TERSE)
8213 register tree type = TREE_TYPE (decl);
8215 add_prototyped_attribute (subr_die, type);
8216 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8219 add_pure_or_virtual_attribute (subr_die, decl);
8220 if (DECL_ARTIFICIAL (decl))
8221 add_AT_flag (subr_die, DW_AT_artificial, 1);
8222 if (TREE_PROTECTED (decl))
8223 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8224 else if (TREE_PRIVATE (decl))
8225 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8230 add_AT_flag (subr_die, DW_AT_declaration, 1);
8232 /* The first time we see a member function, it is in the context of
8233 the class to which it belongs. We make sure of this by emitting
8234 the class first. The next time is the definition, which is
8235 handled above. The two may come from the same source text. */
8236 if (DECL_CONTEXT (decl))
8237 equate_decl_number_to_die (decl, subr_die);
8239 else if (DECL_ABSTRACT (decl))
8241 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8242 but not for extern inline functions. We can't get this completely
8243 correct because information about whether the function was declared
8244 inline is not saved anywhere. */
8245 if (DECL_DEFER_OUTPUT (decl))
8247 if (DECL_INLINE (decl))
8248 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8250 add_AT_unsigned (subr_die, DW_AT_inline,
8251 DW_INL_declared_not_inlined);
8253 else if (DECL_INLINE (decl))
8254 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8258 equate_decl_number_to_die (decl, subr_die);
8260 else if (!DECL_EXTERNAL (decl))
8262 if (origin == NULL_TREE)
8263 equate_decl_number_to_die (decl, subr_die);
8265 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8266 current_funcdef_number);
8267 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8268 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8269 current_funcdef_number);
8270 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8272 add_pubname (decl, subr_die);
8273 add_arange (decl, subr_die);
8275 #ifdef MIPS_DEBUGGING_INFO
8276 /* Add a reference to the FDE for this routine. */
8277 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8280 /* Define the "frame base" location for this routine. We use the
8281 frame pointer or stack pointer registers, since the RTL for local
8282 variables is relative to one of them. */
8284 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8285 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8288 /* ??? This fails for nested inline functions, because context_display
8289 is not part of the state saved/restored for inline functions. */
8290 if (current_function_needs_context)
8291 add_AT_location_description (subr_die, DW_AT_static_link,
8292 lookup_static_chain (decl));
8296 /* Now output descriptions of the arguments for this function. This gets
8297 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8298 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8299 `...' at the end of the formal parameter list. In order to find out if
8300 there was a trailing ellipsis or not, we must instead look at the type
8301 associated with the FUNCTION_DECL. This will be a node of type
8302 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8303 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8304 an ellipsis at the end. */
8305 push_decl_scope (decl);
8307 /* In the case where we are describing a mere function declaration, all we
8308 need to do here (and all we *can* do here) is to describe the *types* of
8309 its formal parameters. */
8310 if (debug_info_level <= DINFO_LEVEL_TERSE)
8312 else if (declaration)
8313 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8316 /* Generate DIEs to represent all known formal parameters */
8317 register tree arg_decls = DECL_ARGUMENTS (decl);
8320 /* When generating DIEs, generate the unspecified_parameters DIE
8321 instead if we come across the arg "__builtin_va_alist" */
8322 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8323 if (TREE_CODE (parm) == PARM_DECL)
8325 if (DECL_NAME (parm)
8326 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8327 "__builtin_va_alist"))
8328 gen_unspecified_parameters_die (parm, subr_die);
8330 gen_decl_die (parm, subr_die);
8333 /* Decide whether we need a unspecified_parameters DIE at the end.
8334 There are 2 more cases to do this for: 1) the ansi ... declaration -
8335 this is detectable when the end of the arg list is not a
8336 void_type_node 2) an unprototyped function declaration (not a
8337 definition). This just means that we have no info about the
8338 parameters at all. */
8339 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8340 if (fn_arg_types != NULL)
8342 /* this is the prototyped case, check for ... */
8343 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8344 gen_unspecified_parameters_die (decl, subr_die);
8346 else if (DECL_INITIAL (decl) == NULL_TREE)
8347 gen_unspecified_parameters_die (decl, subr_die);
8350 /* Output Dwarf info for all of the stuff within the body of the function
8351 (if it has one - it may be just a declaration). */
8352 outer_scope = DECL_INITIAL (decl);
8354 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8355 node created to represent a function. This outermost BLOCK actually
8356 represents the outermost binding contour for the function, i.e. the
8357 contour in which the function's formal parameters and labels get
8358 declared. Curiously, it appears that the front end doesn't actually
8359 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8360 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8361 list for the function instead.) The BLOCK_VARS list for the
8362 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8363 the function however, and we output DWARF info for those in
8364 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8365 node representing the function's outermost pair of curly braces, and
8366 any blocks used for the base and member initializers of a C++
8367 constructor function. */
8368 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8370 current_function_has_inlines = 0;
8371 decls_for_scope (outer_scope, subr_die, 0);
8373 #if 0 && defined (MIPS_DEBUGGING_INFO)
8374 if (current_function_has_inlines)
8376 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8377 if (! comp_unit_has_inlines)
8379 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8380 comp_unit_has_inlines = 1;
8389 /* Generate a DIE to represent a declared data object. */
8392 gen_variable_die (decl, context_die)
8394 register dw_die_ref context_die;
8396 register tree origin = decl_ultimate_origin (decl);
8397 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8399 dw_die_ref old_die = lookup_decl_die (decl);
8401 = (DECL_EXTERNAL (decl)
8402 || current_function_decl != decl_function_context (decl)
8403 || context_die->die_tag == DW_TAG_structure_type
8404 || context_die->die_tag == DW_TAG_union_type);
8407 add_abstract_origin_attribute (var_die, origin);
8408 /* Loop unrolling can create multiple blocks that refer to the same
8409 static variable, so we must test for the DW_AT_declaration flag. */
8410 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8411 copy decls and set the DECL_ABSTRACT flag on them instead of
8413 else if (old_die && TREE_STATIC (decl)
8414 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8416 /* ??? This is an instantiation of a C++ class level static. */
8417 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8418 if (DECL_NAME (decl))
8420 register unsigned file_index
8421 = lookup_filename (DECL_SOURCE_FILE (decl));
8423 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8424 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8426 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8427 != DECL_SOURCE_LINE (decl))
8429 add_AT_unsigned (var_die, DW_AT_decl_line,
8430 DECL_SOURCE_LINE (decl));
8435 add_name_and_src_coords_attributes (var_die, decl);
8436 add_type_attribute (var_die, TREE_TYPE (decl),
8437 TREE_READONLY (decl),
8438 TREE_THIS_VOLATILE (decl), context_die);
8440 if (TREE_PUBLIC (decl))
8441 add_AT_flag (var_die, DW_AT_external, 1);
8443 if (DECL_ARTIFICIAL (decl))
8444 add_AT_flag (var_die, DW_AT_artificial, 1);
8446 if (TREE_PROTECTED (decl))
8447 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8449 else if (TREE_PRIVATE (decl))
8450 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8454 add_AT_flag (var_die, DW_AT_declaration, 1);
8456 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8457 equate_decl_number_to_die (decl, var_die);
8459 if (! declaration && ! DECL_ABSTRACT (decl))
8461 equate_decl_number_to_die (decl, var_die);
8462 add_location_or_const_value_attribute (var_die, decl);
8463 add_pubname (decl, var_die);
8467 /* Generate a DIE to represent a label identifier. */
8470 gen_label_die (decl, context_die)
8472 register dw_die_ref context_die;
8474 register tree origin = decl_ultimate_origin (decl);
8475 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8477 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8478 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8481 add_abstract_origin_attribute (lbl_die, origin);
8483 add_name_and_src_coords_attributes (lbl_die, decl);
8485 if (DECL_ABSTRACT (decl))
8486 equate_decl_number_to_die (decl, lbl_die);
8489 insn = DECL_RTL (decl);
8490 if (GET_CODE (insn) == CODE_LABEL)
8492 /* When optimization is enabled (via -O) some parts of the compiler
8493 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8494 represent source-level labels which were explicitly declared by
8495 the user. This really shouldn't be happening though, so catch
8496 it if it ever does happen. */
8497 if (INSN_DELETED_P (insn))
8500 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8501 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8502 (unsigned) INSN_UID (insn));
8503 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8508 /* Generate a DIE for a lexical block. */
8511 gen_lexical_block_die (stmt, context_die, depth)
8513 register dw_die_ref context_die;
8516 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8517 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8519 if (! BLOCK_ABSTRACT (stmt))
8521 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8523 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8524 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8525 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8528 push_decl_scope (stmt);
8529 decls_for_scope (stmt, stmt_die, depth);
8533 /* Generate a DIE for an inlined subprogram. */
8536 gen_inlined_subroutine_die (stmt, context_die, depth)
8538 register dw_die_ref context_die;
8541 if (! BLOCK_ABSTRACT (stmt))
8543 register dw_die_ref subr_die
8544 = new_die (DW_TAG_inlined_subroutine, context_die);
8545 register tree decl = block_ultimate_origin (stmt);
8546 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8548 add_abstract_origin_attribute (subr_die, decl);
8549 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8551 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8552 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8553 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8554 push_decl_scope (decl);
8555 decls_for_scope (stmt, subr_die, depth);
8557 current_function_has_inlines = 1;
8561 /* Generate a DIE for a field in a record, or structure. */
8564 gen_field_die (decl, context_die)
8566 register dw_die_ref context_die;
8568 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8570 add_name_and_src_coords_attributes (decl_die, decl);
8571 add_type_attribute (decl_die, member_declared_type (decl),
8572 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8575 /* If this is a bit field... */
8576 if (DECL_BIT_FIELD_TYPE (decl))
8578 add_byte_size_attribute (decl_die, decl);
8579 add_bit_size_attribute (decl_die, decl);
8580 add_bit_offset_attribute (decl_die, decl);
8583 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8584 add_data_member_location_attribute (decl_die, decl);
8586 if (DECL_ARTIFICIAL (decl))
8587 add_AT_flag (decl_die, DW_AT_artificial, 1);
8589 if (TREE_PROTECTED (decl))
8590 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8592 else if (TREE_PRIVATE (decl))
8593 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8597 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8598 Use modified_type_die instead.
8599 We keep this code here just in case these types of DIEs may be needed to
8600 represent certain things in other languages (e.g. Pascal) someday. */
8602 gen_pointer_type_die (type, context_die)
8604 register dw_die_ref context_die;
8606 register dw_die_ref ptr_die
8607 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8609 equate_type_number_to_die (type, ptr_die);
8610 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8611 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8614 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8615 Use modified_type_die instead.
8616 We keep this code here just in case these types of DIEs may be needed to
8617 represent certain things in other languages (e.g. Pascal) someday. */
8619 gen_reference_type_die (type, context_die)
8621 register dw_die_ref context_die;
8623 register dw_die_ref ref_die
8624 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8626 equate_type_number_to_die (type, ref_die);
8627 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8628 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8632 /* Generate a DIE for a pointer to a member type. */
8634 gen_ptr_to_mbr_type_die (type, context_die)
8636 register dw_die_ref context_die;
8638 register dw_die_ref ptr_die
8639 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8641 equate_type_number_to_die (type, ptr_die);
8642 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8643 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8644 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8647 /* Generate the DIE for the compilation unit. */
8650 gen_compile_unit_die (main_input_filename)
8651 register char *main_input_filename;
8654 char *wd = getpwd ();
8656 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8657 add_name_attribute (comp_unit_die, main_input_filename);
8660 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8662 sprintf (producer, "%s %s", language_string, version_string);
8664 #ifdef MIPS_DEBUGGING_INFO
8665 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8666 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8667 not appear in the producer string, the debugger reaches the conclusion
8668 that the object file is stripped and has no debugging information.
8669 To get the MIPS/SGI debugger to believe that there is debugging
8670 information in the object file, we add a -g to the producer string. */
8671 if (debug_info_level > DINFO_LEVEL_TERSE)
8672 strcat (producer, " -g");
8675 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8677 if (strcmp (language_string, "GNU C++") == 0)
8678 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8680 else if (strcmp (language_string, "GNU Ada") == 0)
8681 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8683 else if (strcmp (language_string, "GNU F77") == 0)
8684 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8686 else if (strcmp (language_string, "GNU Pascal") == 0)
8687 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8689 else if (flag_traditional)
8690 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8693 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8695 #if 0 /* unimplemented */
8696 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8697 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8701 /* Generate a DIE for a string type. */
8704 gen_string_type_die (type, context_die)
8706 register dw_die_ref context_die;
8708 register dw_die_ref type_die
8709 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8711 equate_type_number_to_die (type, type_die);
8713 /* Fudge the string length attribute for now. */
8715 /* TODO: add string length info.
8716 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8717 bound_representation (upper_bound, 0, 'u'); */
8720 /* Generate the DIE for a base class. */
8723 gen_inheritance_die (binfo, context_die)
8724 register tree binfo;
8725 register dw_die_ref context_die;
8727 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8729 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8730 add_data_member_location_attribute (die, binfo);
8732 if (TREE_VIA_VIRTUAL (binfo))
8733 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
8734 if (TREE_VIA_PUBLIC (binfo))
8735 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
8736 else if (TREE_VIA_PROTECTED (binfo))
8737 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
8740 /* Generate a DIE for a class member. */
8743 gen_member_die (type, context_die)
8745 register dw_die_ref context_die;
8747 register tree member;
8749 /* If this is not an incomplete type, output descriptions of each of its
8750 members. Note that as we output the DIEs necessary to represent the
8751 members of this record or union type, we will also be trying to output
8752 DIEs to represent the *types* of those members. However the `type'
8753 function (above) will specifically avoid generating type DIEs for member
8754 types *within* the list of member DIEs for this (containing) type execpt
8755 for those types (of members) which are explicitly marked as also being
8756 members of this (containing) type themselves. The g++ front- end can
8757 force any given type to be treated as a member of some other
8758 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8759 to point to the TREE node representing the appropriate (containing)
8762 /* First output info about the base classes. */
8763 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
8765 register tree bases = TYPE_BINFO_BASETYPES (type);
8766 register int n_bases = TREE_VEC_LENGTH (bases);
8769 for (i = 0; i < n_bases; i++)
8770 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
8773 /* Now output info about the data members and type members. */
8774 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
8775 gen_decl_die (member, context_die);
8777 /* Now output info about the function members (if any). */
8778 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
8779 gen_decl_die (member, context_die);
8782 /* Generate a DIE for a structure or union type. */
8785 gen_struct_or_union_type_die (type, context_die)
8787 register dw_die_ref context_die;
8789 register dw_die_ref type_die = lookup_type_die (type);
8790 register dw_die_ref scope_die = 0;
8791 register int nested = 0;
8793 if (type_die && ! TYPE_SIZE (type))
8796 if (TYPE_CONTEXT (type) != NULL_TREE
8797 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't')
8800 scope_die = scope_die_for (type, context_die);
8802 if (! type_die || (nested && scope_die == comp_unit_die))
8803 /* First occurrence of type or toplevel definition of nested class. */
8805 register dw_die_ref old_die = type_die;
8807 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
8808 ? DW_TAG_structure_type : DW_TAG_union_type,
8810 equate_type_number_to_die (type, type_die);
8811 add_name_attribute (type_die, type_tag (type));
8813 add_AT_die_ref (type_die, DW_AT_specification, old_die);
8816 remove_AT (type_die, DW_AT_declaration);
8818 /* If we're not in the right context to be defining this type, defer to
8819 avoid tricky recursion. */
8820 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
8822 add_AT_flag (type_die, DW_AT_declaration, 1);
8825 /* If this type has been completed, then give it a byte_size attribute and
8826 then give a list of members. */
8827 else if (TYPE_SIZE (type))
8829 /* Prevent infinite recursion in cases where the type of some member of
8830 this type is expressed in terms of this type itself. */
8831 TREE_ASM_WRITTEN (type) = 1;
8832 add_byte_size_attribute (type_die, type);
8833 if (TYPE_STUB_DECL (type) != NULL_TREE)
8834 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8836 /* If the first reference to this type was as the return type of an
8837 inline function, then it may not have a parent. Fix this now. */
8838 if (type_die->die_parent == NULL)
8839 add_child_die (scope_die, type_die);
8841 push_decl_scope (type);
8842 gen_member_die (type, type_die);
8845 /* GNU extension: Record what type our vtable lives in. */
8846 if (TYPE_VFIELD (type))
8848 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
8850 gen_type_die (vtype, context_die);
8851 add_AT_die_ref (type_die, DW_AT_containing_type,
8852 lookup_type_die (vtype));
8856 add_AT_flag (type_die, DW_AT_declaration, 1);
8859 /* Generate a DIE for a subroutine _type_. */
8862 gen_subroutine_type_die (type, context_die)
8864 register dw_die_ref context_die;
8866 register tree return_type = TREE_TYPE (type);
8867 register dw_die_ref subr_die
8868 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
8870 equate_type_number_to_die (type, subr_die);
8871 add_prototyped_attribute (subr_die, type);
8872 add_type_attribute (subr_die, return_type, 0, 0, context_die);
8873 gen_formal_types_die (type, subr_die);
8876 /* Generate a DIE for a type definition */
8879 gen_typedef_die (decl, context_die)
8881 register dw_die_ref context_die;
8883 register dw_die_ref type_die;
8884 register tree origin;
8886 if (TREE_ASM_WRITTEN (decl))
8888 TREE_ASM_WRITTEN (decl) = 1;
8890 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
8891 origin = decl_ultimate_origin (decl);
8893 add_abstract_origin_attribute (type_die, origin);
8897 add_name_and_src_coords_attributes (type_die, decl);
8898 if (DECL_ORIGINAL_TYPE (decl))
8900 type = DECL_ORIGINAL_TYPE (decl);
8901 equate_type_number_to_die (TREE_TYPE (decl), type_die);
8904 type = TREE_TYPE (decl);
8905 add_type_attribute (type_die, type, TREE_READONLY (decl),
8906 TREE_THIS_VOLATILE (decl), context_die);
8909 if (DECL_ABSTRACT (decl))
8910 equate_decl_number_to_die (decl, type_die);
8913 /* Generate a type description DIE. */
8916 gen_type_die (type, context_die)
8918 register dw_die_ref context_die;
8920 if (type == NULL_TREE || type == error_mark_node)
8923 /* We are going to output a DIE to represent the unqualified version of
8924 this type (i.e. without any const or volatile qualifiers) so get the
8925 main variant (i.e. the unqualified version) of this type now. */
8926 type = type_main_variant (type);
8928 if (TREE_ASM_WRITTEN (type))
8931 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8932 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
8934 TREE_ASM_WRITTEN (type) = 1;
8935 gen_decl_die (TYPE_NAME (type), context_die);
8939 switch (TREE_CODE (type))
8945 case REFERENCE_TYPE:
8946 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8947 ensures that the gen_type_die recursion will terminate even if the
8948 type is recursive. Recursive types are possible in Ada. */
8949 /* ??? We could perhaps do this for all types before the switch
8951 TREE_ASM_WRITTEN (type) = 1;
8953 /* For these types, all that is required is that we output a DIE (or a
8954 set of DIEs) to represent the "basis" type. */
8955 gen_type_die (TREE_TYPE (type), context_die);
8959 /* This code is used for C++ pointer-to-data-member types.
8960 Output a description of the relevant class type. */
8961 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
8963 /* Output a description of the type of the object pointed to. */
8964 gen_type_die (TREE_TYPE (type), context_die);
8966 /* Now output a DIE to represent this pointer-to-data-member type
8968 gen_ptr_to_mbr_type_die (type, context_die);
8972 gen_type_die (TYPE_DOMAIN (type), context_die);
8973 gen_set_type_die (type, context_die);
8977 gen_type_die (TREE_TYPE (type), context_die);
8978 abort (); /* No way to represent these in Dwarf yet! */
8982 /* Force out return type (in case it wasn't forced out already). */
8983 gen_type_die (TREE_TYPE (type), context_die);
8984 gen_subroutine_type_die (type, context_die);
8988 /* Force out return type (in case it wasn't forced out already). */
8989 gen_type_die (TREE_TYPE (type), context_die);
8990 gen_subroutine_type_die (type, context_die);
8994 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
8996 gen_type_die (TREE_TYPE (type), context_die);
8997 gen_string_type_die (type, context_die);
9000 gen_array_type_die (type, context_die);
9006 case QUAL_UNION_TYPE:
9007 /* If this is a nested type whose containing class hasn't been
9008 written out yet, writing it out will cover this one, too. */
9009 if (TYPE_CONTEXT (type)
9010 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9011 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9013 gen_type_die (TYPE_CONTEXT (type), context_die);
9015 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9018 /* If that failed, attach ourselves to the stub. */
9019 push_decl_scope (TYPE_CONTEXT (type));
9020 context_die = lookup_type_die (TYPE_CONTEXT (type));
9023 if (TREE_CODE (type) == ENUMERAL_TYPE)
9024 gen_enumeration_type_die (type, context_die);
9026 gen_struct_or_union_type_die (type, context_die);
9028 if (TYPE_CONTEXT (type)
9029 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9030 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9033 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9034 it up if it is ever completed. gen_*_type_die will set it for us
9035 when appropriate. */
9044 /* No DIEs needed for fundamental types. */
9048 /* No Dwarf representation currently defined. */
9055 TREE_ASM_WRITTEN (type) = 1;
9058 /* Generate a DIE for a tagged type instantiation. */
9061 gen_tagged_type_instantiation_die (type, context_die)
9063 register dw_die_ref context_die;
9065 if (type == NULL_TREE || type == error_mark_node)
9068 /* We are going to output a DIE to represent the unqualified version of
9069 this type (i.e. without any const or volatile qualifiers) so make sure
9070 that we have the main variant (i.e. the unqualified version) of this
9072 if (type != type_main_variant (type)
9073 || !TREE_ASM_WRITTEN (type))
9076 switch (TREE_CODE (type))
9082 gen_inlined_enumeration_type_die (type, context_die);
9086 gen_inlined_structure_type_die (type, context_die);
9090 case QUAL_UNION_TYPE:
9091 gen_inlined_union_type_die (type, context_die);
9099 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9100 things which are local to the given block. */
9103 gen_block_die (stmt, context_die, depth)
9105 register dw_die_ref context_die;
9108 register int must_output_die = 0;
9109 register tree origin;
9111 register enum tree_code origin_code;
9113 /* Ignore blocks never really used to make RTL. */
9115 if (stmt == NULL_TREE || !TREE_USED (stmt))
9118 /* Determine the "ultimate origin" of this block. This block may be an
9119 inlined instance of an inlined instance of inline function, so we have
9120 to trace all of the way back through the origin chain to find out what
9121 sort of node actually served as the original seed for the creation of
9122 the current block. */
9123 origin = block_ultimate_origin (stmt);
9124 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9126 /* Determine if we need to output any Dwarf DIEs at all to represent this
9128 if (origin_code == FUNCTION_DECL)
9129 /* The outer scopes for inlinings *must* always be represented. We
9130 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9131 must_output_die = 1;
9134 /* In the case where the current block represents an inlining of the
9135 "body block" of an inline function, we must *NOT* output any DIE for
9136 this block because we have already output a DIE to represent the
9137 whole inlined function scope and the "body block" of any function
9138 doesn't really represent a different scope according to ANSI C
9139 rules. So we check here to make sure that this block does not
9140 represent a "body block inlining" before trying to set the
9141 `must_output_die' flag. */
9142 if (! is_body_block (origin ? origin : stmt))
9144 /* Determine if this block directly contains any "significant"
9145 local declarations which we will need to output DIEs for. */
9146 if (debug_info_level > DINFO_LEVEL_TERSE)
9147 /* We are not in terse mode so *any* local declaration counts
9148 as being a "significant" one. */
9149 must_output_die = (BLOCK_VARS (stmt) != NULL);
9151 /* We are in terse mode, so only local (nested) function
9152 definitions count as "significant" local declarations. */
9153 for (decl = BLOCK_VARS (stmt);
9154 decl != NULL; decl = TREE_CHAIN (decl))
9155 if (TREE_CODE (decl) == FUNCTION_DECL
9156 && DECL_INITIAL (decl))
9158 must_output_die = 1;
9164 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9165 DIE for any block which contains no significant local declarations at
9166 all. Rather, in such cases we just call `decls_for_scope' so that any
9167 needed Dwarf info for any sub-blocks will get properly generated. Note
9168 that in terse mode, our definition of what constitutes a "significant"
9169 local declaration gets restricted to include only inlined function
9170 instances and local (nested) function definitions. */
9171 if (must_output_die)
9173 if (origin_code == FUNCTION_DECL)
9174 gen_inlined_subroutine_die (stmt, context_die, depth);
9176 gen_lexical_block_die (stmt, context_die, depth);
9179 decls_for_scope (stmt, context_die, depth);
9182 /* Generate all of the decls declared within a given scope and (recursively)
9183 all of it's sub-blocks. */
9186 decls_for_scope (stmt, context_die, depth)
9188 register dw_die_ref context_die;
9192 register tree subblocks;
9194 /* Ignore blocks never really used to make RTL. */
9195 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9198 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9199 next_block_number++;
9201 /* Output the DIEs to represent all of the data objects and typedefs
9202 declared directly within this block but not within any nested
9203 sub-blocks. Also, nested function and tag DIEs have been
9204 generated with a parent of NULL; fix that up now. */
9205 for (decl = BLOCK_VARS (stmt);
9206 decl != NULL; decl = TREE_CHAIN (decl))
9208 register dw_die_ref die;
9210 if (TREE_CODE (decl) == FUNCTION_DECL)
9211 die = lookup_decl_die (decl);
9212 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9213 die = lookup_type_die (TREE_TYPE (decl));
9217 if (die != NULL && die->die_parent == NULL)
9218 add_child_die (context_die, die);
9220 gen_decl_die (decl, context_die);
9223 /* Output the DIEs to represent all sub-blocks (and the items declared
9224 therein) of this block. */
9225 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9227 subblocks = BLOCK_CHAIN (subblocks))
9228 gen_block_die (subblocks, context_die, depth + 1);
9231 /* Is this a typedef we can avoid emitting? */
9234 is_redundant_typedef (decl)
9237 if (TYPE_DECL_IS_STUB (decl))
9240 if (DECL_ARTIFICIAL (decl)
9241 && DECL_CONTEXT (decl)
9242 && is_tagged_type (DECL_CONTEXT (decl))
9243 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9244 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9245 /* Also ignore the artificial member typedef for the class name. */
9251 /* Generate Dwarf debug information for a decl described by DECL. */
9254 gen_decl_die (decl, context_die)
9256 register dw_die_ref context_die;
9258 register tree origin;
9260 /* Make a note of the decl node we are going to be working on. We may need
9261 to give the user the source coordinates of where it appeared in case we
9262 notice (later on) that something about it looks screwy. */
9263 dwarf_last_decl = decl;
9265 if (TREE_CODE (decl) == ERROR_MARK)
9268 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9269 ignore a function definition, since that would screw up our count of
9270 blocks, and that in turn will completely screw up the labels we will
9271 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9272 subsequent blocks). */
9273 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9276 switch (TREE_CODE (decl))
9279 /* The individual enumerators of an enum type get output when we output
9280 the Dwarf representation of the relevant enum type itself. */
9284 /* Don't output any DIEs to represent mere function declarations,
9285 unless they are class members or explicit block externs. */
9286 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9287 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9290 if (debug_info_level > DINFO_LEVEL_TERSE)
9292 /* Before we describe the FUNCTION_DECL itself, make sure that we
9293 have described its return type. */
9294 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9296 /* And its containing type. */
9297 origin = decl_class_context (decl);
9298 if (origin != NULL_TREE)
9299 gen_type_die (origin, context_die);
9301 /* And its virtual context. */
9302 if (DECL_VINDEX (decl) != NULL_TREE)
9303 gen_type_die (DECL_CONTEXT (decl), context_die);
9306 /* Now output a DIE to represent the function itself. */
9307 gen_subprogram_die (decl, context_die);
9311 /* If we are in terse mode, don't generate any DIEs to represent any
9313 if (debug_info_level <= DINFO_LEVEL_TERSE)
9316 /* In the special case of a TYPE_DECL node representing the
9317 declaration of some type tag, if the given TYPE_DECL is marked as
9318 having been instantiated from some other (original) TYPE_DECL node
9319 (e.g. one which was generated within the original definition of an
9320 inline function) we have to generate a special (abbreviated)
9321 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9323 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9325 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9329 if (is_redundant_typedef (decl))
9330 gen_type_die (TREE_TYPE (decl), context_die);
9332 /* Output a DIE to represent the typedef itself. */
9333 gen_typedef_die (decl, context_die);
9337 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9338 gen_label_die (decl, context_die);
9342 /* If we are in terse mode, don't generate any DIEs to represent any
9343 variable declarations or definitions. */
9344 if (debug_info_level <= DINFO_LEVEL_TERSE)
9347 /* Output any DIEs that are needed to specify the type of this data
9349 gen_type_die (TREE_TYPE (decl), context_die);
9351 /* And its containing type. */
9352 origin = decl_class_context (decl);
9353 if (origin != NULL_TREE)
9354 gen_type_die (origin, context_die);
9356 /* Now output the DIE to represent the data object itself. This gets
9357 complicated because of the possibility that the VAR_DECL really
9358 represents an inlined instance of a formal parameter for an inline
9360 origin = decl_ultimate_origin (decl);
9361 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9362 gen_formal_parameter_die (decl, context_die);
9364 gen_variable_die (decl, context_die);
9368 /* Ignore the nameless fields that are used to skip bits, but
9369 handle C++ anonymous unions. */
9370 if (DECL_NAME (decl) != NULL_TREE
9371 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9373 gen_type_die (member_declared_type (decl), context_die);
9374 gen_field_die (decl, context_die);
9379 gen_type_die (TREE_TYPE (decl), context_die);
9380 gen_formal_parameter_die (decl, context_die);
9388 /* Write the debugging output for DECL. */
9391 dwarf2out_decl (decl)
9394 register dw_die_ref context_die = comp_unit_die;
9396 if (TREE_CODE (decl) == ERROR_MARK)
9399 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9400 hope that the node in question doesn't represent a function definition.
9401 If it does, then totally ignoring it is bound to screw up our count of
9402 blocks, and that in turn will completely screw up the labels we will
9403 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9404 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9405 own sequence numbers with them!) */
9406 if (DECL_IGNORED_P (decl))
9408 if (TREE_CODE (decl) == FUNCTION_DECL
9409 && DECL_INITIAL (decl) != NULL)
9415 switch (TREE_CODE (decl))
9418 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9419 builtin function. Explicit programmer-supplied declarations of
9420 these same functions should NOT be ignored however. */
9421 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9424 /* What we would really like to do here is to filter out all mere
9425 file-scope declarations of file-scope functions which are never
9426 referenced later within this translation unit (and keep all of ones
9427 that *are* referenced later on) but we aren't clairvoyant, so we have
9428 no idea which functions will be referenced in the future (i.e. later
9429 on within the current translation unit). So here we just ignore all
9430 file-scope function declarations which are not also definitions. If
9431 and when the debugger needs to know something about these functions,
9432 it wil have to hunt around and find the DWARF information associated
9433 with the definition of the function. Note that we can't just check
9434 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9435 definitions and which ones represent mere declarations. We have to
9436 check `DECL_INITIAL' instead. That's because the C front-end
9437 supports some weird semantics for "extern inline" function
9438 definitions. These can get inlined within the current translation
9439 unit (an thus, we need to generate DWARF info for their abstract
9440 instances so that the DWARF info for the concrete inlined instances
9441 can have something to refer to) but the compiler never generates any
9442 out-of-lines instances of such things (despite the fact that they
9443 *are* definitions). The important point is that the C front-end
9444 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9445 to generate DWARF for them anyway. Note that the C++ front-end also
9446 plays some similar games for inline function definitions appearing
9447 within include files which also contain
9448 `#pragma interface' pragmas. */
9449 if (DECL_INITIAL (decl) == NULL_TREE)
9452 /* If we're a nested function, initially use a parent of NULL; if we're
9453 a plain function, this will be fixed up in decls_for_scope. If
9454 we're a method, it will be ignored, since we already have a DIE. */
9455 if (decl_function_context (decl))
9461 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9462 declaration and if the declaration was never even referenced from
9463 within this entire compilation unit. We suppress these DIEs in
9464 order to save space in the .debug section (by eliminating entries
9465 which are probably useless). Note that we must not suppress
9466 block-local extern declarations (whether used or not) because that
9467 would screw-up the debugger's name lookup mechanism and cause it to
9468 miss things which really ought to be in scope at a given point. */
9469 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9472 /* If we are in terse mode, don't generate any DIEs to represent any
9473 variable declarations or definitions. */
9474 if (debug_info_level <= DINFO_LEVEL_TERSE)
9479 /* Don't bother trying to generate any DIEs to represent any of the
9480 normal built-in types for the language we are compiling. */
9481 if (DECL_SOURCE_LINE (decl) == 0)
9483 /* OK, we need to generate one for `bool' so GDB knows what type
9484 comparisons have. */
9485 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9486 == DW_LANG_C_plus_plus)
9487 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9488 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9493 /* If we are in terse mode, don't generate any DIEs for types. */
9494 if (debug_info_level <= DINFO_LEVEL_TERSE)
9497 /* If we're a function-scope tag, initially use a parent of NULL;
9498 this will be fixed up in decls_for_scope. */
9499 if (decl_function_context (decl))
9508 gen_decl_die (decl, context_die);
9509 output_pending_types_for_scope (comp_unit_die);
9512 /* Output a marker (i.e. a label) for the beginning of the generated code for
9516 dwarf2out_begin_block (blocknum)
9517 register unsigned blocknum;
9519 function_section (current_function_decl);
9520 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9523 /* Output a marker (i.e. a label) for the end of the generated code for a
9527 dwarf2out_end_block (blocknum)
9528 register unsigned blocknum;
9530 function_section (current_function_decl);
9531 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9534 /* Output a marker (i.e. a label) at a point in the assembly code which
9535 corresponds to a given source level label. */
9538 dwarf2out_label (insn)
9541 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9543 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9545 function_section (current_function_decl);
9546 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9547 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9548 (unsigned) INSN_UID (insn));
9552 /* Lookup a filename (in the list of filenames that we know about here in
9553 dwarf2out.c) and return its "index". The index of each (known) filename is
9554 just a unique number which is associated with only that one filename.
9555 We need such numbers for the sake of generating labels
9556 (in the .debug_sfnames section) and references to those
9557 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9558 If the filename given as an argument is not found in our current list,
9559 add it to the list and assign it the next available unique index number.
9560 In order to speed up searches, we remember the index of the filename
9561 was looked up last. This handles the majority of all searches. */
9564 lookup_filename (file_name)
9567 static unsigned last_file_lookup_index = 0;
9568 register unsigned i;
9570 /* Check to see if the file name that was searched on the previous call
9571 matches this file name. If so, return the index. */
9572 if (last_file_lookup_index != 0)
9573 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9574 return last_file_lookup_index;
9576 /* Didn't match the previous lookup, search the table */
9577 for (i = 1; i < file_table_in_use; ++i)
9578 if (strcmp (file_name, file_table[i]) == 0)
9580 last_file_lookup_index = i;
9584 /* Prepare to add a new table entry by making sure there is enough space in
9585 the table to do so. If not, expand the current table. */
9586 if (file_table_in_use == file_table_allocated)
9588 file_table_allocated += FILE_TABLE_INCREMENT;
9590 = (char **) xrealloc (file_table,
9591 file_table_allocated * sizeof (char *));
9594 /* Add the new entry to the end of the filename table. */
9595 file_table[file_table_in_use] = xstrdup (file_name);
9596 last_file_lookup_index = file_table_in_use++;
9598 return last_file_lookup_index;
9601 /* Output a label to mark the beginning of a source code line entry
9602 and record information relating to this source line, in
9603 'line_info_table' for later output of the .debug_line section. */
9606 dwarf2out_line (filename, line)
9607 register char *filename;
9608 register unsigned line;
9610 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9612 function_section (current_function_decl);
9614 if (DECL_SECTION_NAME (current_function_decl))
9616 register dw_separate_line_info_ref line_info;
9617 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9618 separate_line_info_table_in_use);
9619 fputc ('\n', asm_out_file);
9621 /* expand the line info table if necessary */
9622 if (separate_line_info_table_in_use
9623 == separate_line_info_table_allocated)
9625 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9626 separate_line_info_table
9627 = (dw_separate_line_info_ref)
9628 xrealloc (separate_line_info_table,
9629 separate_line_info_table_allocated
9630 * sizeof (dw_separate_line_info_entry));
9633 /* Add the new entry at the end of the line_info_table. */
9635 = &separate_line_info_table[separate_line_info_table_in_use++];
9636 line_info->dw_file_num = lookup_filename (filename);
9637 line_info->dw_line_num = line;
9638 line_info->function = current_funcdef_number;
9642 register dw_line_info_ref line_info;
9644 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9645 line_info_table_in_use);
9646 fputc ('\n', asm_out_file);
9648 /* Expand the line info table if necessary. */
9649 if (line_info_table_in_use == line_info_table_allocated)
9651 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9653 = (dw_line_info_ref)
9654 xrealloc (line_info_table,
9655 (line_info_table_allocated
9656 * sizeof (dw_line_info_entry)));
9659 /* Add the new entry at the end of the line_info_table. */
9660 line_info = &line_info_table[line_info_table_in_use++];
9661 line_info->dw_file_num = lookup_filename (filename);
9662 line_info->dw_line_num = line;
9667 /* Record the beginning of a new source file, for later output
9668 of the .debug_macinfo section. At present, unimplemented. */
9671 dwarf2out_start_source_file (filename)
9672 register char *filename;
9676 /* Record the end of a source file, for later output
9677 of the .debug_macinfo section. At present, unimplemented. */
9680 dwarf2out_end_source_file ()
9684 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9685 the tail part of the directive line, i.e. the part which is past the
9686 initial whitespace, #, whitespace, directive-name, whitespace part. */
9689 dwarf2out_define (lineno, buffer)
9690 register unsigned lineno;
9691 register char *buffer;
9693 static int initialized = 0;
9696 dwarf2out_start_source_file (primary_filename);
9701 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9702 the tail part of the directive line, i.e. the part which is past the
9703 initial whitespace, #, whitespace, directive-name, whitespace part. */
9706 dwarf2out_undef (lineno, buffer)
9707 register unsigned lineno;
9708 register char *buffer;
9712 /* Set up for Dwarf output at the start of compilation. */
9715 dwarf2out_init (asm_out_file, main_input_filename)
9716 register FILE *asm_out_file;
9717 register char *main_input_filename;
9719 /* Remember the name of the primary input file. */
9720 primary_filename = main_input_filename;
9722 /* Allocate the initial hunk of the file_table. */
9723 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
9724 bzero ((char *) file_table, FILE_TABLE_INCREMENT * sizeof (char *));
9725 file_table_allocated = FILE_TABLE_INCREMENT;
9727 /* Skip the first entry - file numbers begin at 1. */
9728 file_table_in_use = 1;
9730 /* Allocate the initial hunk of the decl_die_table. */
9732 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9733 bzero ((char *) decl_die_table,
9734 DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9735 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
9736 decl_die_table_in_use = 0;
9738 /* Allocate the initial hunk of the decl_scope_table. */
9740 = (decl_scope_node *) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9741 * sizeof (decl_scope_node));
9742 bzero ((char *) decl_scope_table,
9743 DECL_SCOPE_TABLE_INCREMENT * sizeof (decl_scope_node));
9744 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
9745 decl_scope_depth = 0;
9747 /* Allocate the initial hunk of the abbrev_die_table. */
9749 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9750 * sizeof (dw_die_ref));
9751 bzero ((char *) abbrev_die_table,
9752 ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9753 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
9754 /* Zero-th entry is allocated, but unused */
9755 abbrev_die_table_in_use = 1;
9757 /* Allocate the initial hunk of the line_info_table. */
9759 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
9760 * sizeof (dw_line_info_entry));
9761 bzero ((char *) line_info_table,
9762 LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry));
9763 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
9764 /* Zero-th entry is allocated, but unused */
9765 line_info_table_in_use = 1;
9767 /* Generate the initial DIE for the .debug section. Note that the (string)
9768 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9769 will (typically) be a relative pathname and that this pathname should be
9770 taken as being relative to the directory from which the compiler was
9771 invoked when the given (base) source file was compiled. */
9772 gen_compile_unit_die (main_input_filename);
9774 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
9777 /* Output stuff that dwarf requires at the end of every file,
9778 and generate the DWARF-2 debugging info. */
9783 limbo_die_node *node, *next_node;
9787 /* Traverse the limbo die list, and add parent/child links. The only
9788 dies without parents that should be here are concrete instances of
9789 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9790 For concrete instances, we can get the parent die from the abstract
9792 for (node = limbo_die_list; node; node = next_node)
9794 next_node = node->next;
9797 if (die->die_parent == NULL)
9799 a = get_AT (die, DW_AT_abstract_origin);
9801 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
9802 else if (die == comp_unit_die)
9810 /* Traverse the DIE tree and add sibling attributes to those DIE's
9811 that have children. */
9812 add_sibling_attributes (comp_unit_die);
9814 /* Output a terminator label for the .text section. */
9815 fputc ('\n', asm_out_file);
9816 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
9817 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
9820 /* Output a terminator label for the .data section. */
9821 fputc ('\n', asm_out_file);
9822 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
9823 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
9825 /* Output a terminator label for the .bss section. */
9826 fputc ('\n', asm_out_file);
9827 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
9828 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
9831 /* Output the source line correspondence table. */
9832 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
9834 fputc ('\n', asm_out_file);
9835 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
9836 output_line_info ();
9838 /* We can only use the low/high_pc attributes if all of the code
9840 if (separate_line_info_table_in_use == 0)
9842 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, TEXT_SECTION);
9843 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
9846 add_AT_section_offset (comp_unit_die, DW_AT_stmt_list, DEBUG_LINE_SECTION);
9849 /* Output the abbreviation table. */
9850 fputc ('\n', asm_out_file);
9851 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
9852 build_abbrev_table (comp_unit_die);
9853 output_abbrev_section ();
9855 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9856 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
9857 calc_die_sizes (comp_unit_die);
9859 /* Output debugging information. */
9860 fputc ('\n', asm_out_file);
9861 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
9862 output_compilation_unit_header ();
9863 output_die (comp_unit_die);
9865 if (pubname_table_in_use)
9867 /* Output public names table. */
9868 fputc ('\n', asm_out_file);
9869 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
9873 if (fde_table_in_use)
9875 /* Output the address range information. */
9876 fputc ('\n', asm_out_file);
9877 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
9881 #endif /* DWARF2_DEBUGGING_INFO */