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));
2510 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2512 static void pend_type PROTO((tree));
2513 static void output_pending_types_for_scope PROTO((dw_die_ref));
2514 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2515 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2516 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2517 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2518 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2519 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2520 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2521 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2522 static void gen_variable_die PROTO((tree, dw_die_ref));
2523 static void gen_label_die PROTO((tree, dw_die_ref));
2524 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2525 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2526 static void gen_field_die PROTO((tree, dw_die_ref));
2527 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2528 static void gen_compile_unit_die PROTO((char *));
2529 static void gen_string_type_die PROTO((tree, dw_die_ref));
2530 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2531 static void gen_member_die PROTO((tree, dw_die_ref));
2532 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2533 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2534 static void gen_typedef_die PROTO((tree, dw_die_ref));
2535 static void gen_type_die PROTO((tree, dw_die_ref));
2536 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2537 static void gen_block_die PROTO((tree, dw_die_ref, int));
2538 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2539 static int is_redundant_typedef PROTO((tree));
2540 static void gen_decl_die PROTO((tree, dw_die_ref));
2541 static unsigned lookup_filename PROTO((char *));
2543 /* Section names used to hold DWARF debugging information. */
2544 #ifndef DEBUG_INFO_SECTION
2545 #define DEBUG_INFO_SECTION ".debug_info"
2547 #ifndef ABBREV_SECTION
2548 #define ABBREV_SECTION ".debug_abbrev"
2550 #ifndef ARANGES_SECTION
2551 #define ARANGES_SECTION ".debug_aranges"
2553 #ifndef DW_MACINFO_SECTION
2554 #define DW_MACINFO_SECTION ".debug_macinfo"
2556 #ifndef DEBUG_LINE_SECTION
2557 #define DEBUG_LINE_SECTION ".debug_line"
2560 #define LOC_SECTION ".debug_loc"
2562 #ifndef PUBNAMES_SECTION
2563 #define PUBNAMES_SECTION ".debug_pubnames"
2566 #define STR_SECTION ".debug_str"
2569 /* Standard ELF section names for compiled code and data. */
2570 #ifndef TEXT_SECTION
2571 #define TEXT_SECTION ".text"
2573 #ifndef DATA_SECTION
2574 #define DATA_SECTION ".data"
2577 #define BSS_SECTION ".bss"
2581 /* Definitions of defaults for formats and names of various special
2582 (artificial) labels which may be generated within this file (when the -g
2583 options is used and DWARF_DEBUGGING_INFO is in effect.
2584 If necessary, these may be overridden from within the tm.h file, but
2585 typically, overriding these defaults is unnecessary. */
2587 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2589 #ifndef TEXT_END_LABEL
2590 #define TEXT_END_LABEL "Letext"
2592 #ifndef DATA_END_LABEL
2593 #define DATA_END_LABEL "Ledata"
2595 #ifndef BSS_END_LABEL
2596 #define BSS_END_LABEL "Lebss"
2598 #ifndef INSN_LABEL_FMT
2599 #define INSN_LABEL_FMT "LI%u_"
2601 #ifndef BLOCK_BEGIN_LABEL
2602 #define BLOCK_BEGIN_LABEL "LBB"
2604 #ifndef BLOCK_END_LABEL
2605 #define BLOCK_END_LABEL "LBE"
2607 #ifndef BODY_BEGIN_LABEL
2608 #define BODY_BEGIN_LABEL "Lbb"
2610 #ifndef BODY_END_LABEL
2611 #define BODY_END_LABEL "Lbe"
2613 #ifndef LINE_CODE_LABEL
2614 #define LINE_CODE_LABEL "LM"
2616 #ifndef SEPARATE_LINE_CODE_LABEL
2617 #define SEPARATE_LINE_CODE_LABEL "LSM"
2620 /* Convert a reference to the assembler name of a C-level name. This
2621 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2622 a string rather than writing to a file. */
2623 #ifndef ASM_NAME_TO_STRING
2624 #define ASM_NAME_TO_STRING(STR, NAME) \
2626 if ((NAME)[0] == '*') \
2627 strcpy (STR, NAME+1); \
2629 strcpy (STR, NAME); \
2634 /* Convert an integer constant expression into assembler syntax. Addition
2635 and subtraction are the only arithmetic that may appear in these
2636 expressions. This is an adaptation of output_addr_const in final.c.
2637 Here, the target of the conversion is a string buffer. We can't use
2638 output_addr_const directly, because it writes to a file. */
2641 addr_const_to_string (str, x)
2650 switch (GET_CODE (x))
2660 ASM_NAME_TO_STRING (buf1, XSTR (x, 0));
2665 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2666 ASM_NAME_TO_STRING (buf2, buf1);
2671 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2672 ASM_NAME_TO_STRING (buf2, buf1);
2677 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2682 /* This used to output parentheses around the expression, but that does
2683 not work on the 386 (either ATT or BSD assembler). */
2684 addr_const_to_string (buf1, XEXP (x, 0));
2689 if (GET_MODE (x) == VOIDmode)
2691 /* We can use %d if the number is one word and positive. */
2692 if (CONST_DOUBLE_HIGH (x))
2693 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2694 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2695 else if (CONST_DOUBLE_LOW (x) < 0)
2696 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2698 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2699 CONST_DOUBLE_LOW (x));
2703 /* We can't handle floating point constants; PRINT_OPERAND must
2705 output_operand_lossage ("floating constant misused");
2709 /* Some assemblers need integer constants to appear last (eg masm). */
2710 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2712 addr_const_to_string (buf1, XEXP (x, 1));
2714 if (INTVAL (XEXP (x, 0)) >= 0)
2717 addr_const_to_string (buf1, XEXP (x, 0));
2722 addr_const_to_string (buf1, XEXP (x, 0));
2724 if (INTVAL (XEXP (x, 1)) >= 0)
2727 addr_const_to_string (buf1, XEXP (x, 1));
2733 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2734 can't handle that. */
2735 x = simplify_subtraction (x);
2736 if (GET_CODE (x) != MINUS)
2739 addr_const_to_string (buf1, XEXP (x, 0));
2742 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2743 && INTVAL (XEXP (x, 1)) < 0)
2745 strcat (str, ASM_OPEN_PAREN);
2746 addr_const_to_string (buf1, XEXP (x, 1));
2748 strcat (str, ASM_CLOSE_PAREN);
2752 addr_const_to_string (buf1, XEXP (x, 1));
2759 addr_const_to_string (buf1, XEXP (x, 0));
2764 output_operand_lossage ("invalid expression as operand");
2768 /* Convert an address constant to a string, and return a pointer to
2769 a copy of the result, located on the heap. */
2776 addr_const_to_string (buf, x);
2777 return xstrdup (buf);
2780 /* Test if rtl node points to a pseudo register. */
2786 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2787 || ((GET_CODE (rtl) == SUBREG)
2788 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2791 /* Return a reference to a type, with its const and volatile qualifiers
2795 type_main_variant (type)
2798 type = TYPE_MAIN_VARIANT (type);
2800 /* There really should be only one main variant among any group of variants
2801 of a given type (and all of the MAIN_VARIANT values for all members of
2802 the group should point to that one type) but sometimes the C front-end
2803 messes this up for array types, so we work around that bug here. */
2805 if (TREE_CODE (type) == ARRAY_TYPE)
2806 while (type != TYPE_MAIN_VARIANT (type))
2807 type = TYPE_MAIN_VARIANT (type);
2812 /* Return non-zero if the given type node represents a tagged type. */
2815 is_tagged_type (type)
2818 register enum tree_code code = TREE_CODE (type);
2820 return (code == RECORD_TYPE || code == UNION_TYPE
2821 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2824 /* Convert a DIE tag into its string name. */
2827 dwarf_tag_name (tag)
2828 register unsigned tag;
2832 case DW_TAG_padding:
2833 return "DW_TAG_padding";
2834 case DW_TAG_array_type:
2835 return "DW_TAG_array_type";
2836 case DW_TAG_class_type:
2837 return "DW_TAG_class_type";
2838 case DW_TAG_entry_point:
2839 return "DW_TAG_entry_point";
2840 case DW_TAG_enumeration_type:
2841 return "DW_TAG_enumeration_type";
2842 case DW_TAG_formal_parameter:
2843 return "DW_TAG_formal_parameter";
2844 case DW_TAG_imported_declaration:
2845 return "DW_TAG_imported_declaration";
2847 return "DW_TAG_label";
2848 case DW_TAG_lexical_block:
2849 return "DW_TAG_lexical_block";
2851 return "DW_TAG_member";
2852 case DW_TAG_pointer_type:
2853 return "DW_TAG_pointer_type";
2854 case DW_TAG_reference_type:
2855 return "DW_TAG_reference_type";
2856 case DW_TAG_compile_unit:
2857 return "DW_TAG_compile_unit";
2858 case DW_TAG_string_type:
2859 return "DW_TAG_string_type";
2860 case DW_TAG_structure_type:
2861 return "DW_TAG_structure_type";
2862 case DW_TAG_subroutine_type:
2863 return "DW_TAG_subroutine_type";
2864 case DW_TAG_typedef:
2865 return "DW_TAG_typedef";
2866 case DW_TAG_union_type:
2867 return "DW_TAG_union_type";
2868 case DW_TAG_unspecified_parameters:
2869 return "DW_TAG_unspecified_parameters";
2870 case DW_TAG_variant:
2871 return "DW_TAG_variant";
2872 case DW_TAG_common_block:
2873 return "DW_TAG_common_block";
2874 case DW_TAG_common_inclusion:
2875 return "DW_TAG_common_inclusion";
2876 case DW_TAG_inheritance:
2877 return "DW_TAG_inheritance";
2878 case DW_TAG_inlined_subroutine:
2879 return "DW_TAG_inlined_subroutine";
2881 return "DW_TAG_module";
2882 case DW_TAG_ptr_to_member_type:
2883 return "DW_TAG_ptr_to_member_type";
2884 case DW_TAG_set_type:
2885 return "DW_TAG_set_type";
2886 case DW_TAG_subrange_type:
2887 return "DW_TAG_subrange_type";
2888 case DW_TAG_with_stmt:
2889 return "DW_TAG_with_stmt";
2890 case DW_TAG_access_declaration:
2891 return "DW_TAG_access_declaration";
2892 case DW_TAG_base_type:
2893 return "DW_TAG_base_type";
2894 case DW_TAG_catch_block:
2895 return "DW_TAG_catch_block";
2896 case DW_TAG_const_type:
2897 return "DW_TAG_const_type";
2898 case DW_TAG_constant:
2899 return "DW_TAG_constant";
2900 case DW_TAG_enumerator:
2901 return "DW_TAG_enumerator";
2902 case DW_TAG_file_type:
2903 return "DW_TAG_file_type";
2905 return "DW_TAG_friend";
2906 case DW_TAG_namelist:
2907 return "DW_TAG_namelist";
2908 case DW_TAG_namelist_item:
2909 return "DW_TAG_namelist_item";
2910 case DW_TAG_packed_type:
2911 return "DW_TAG_packed_type";
2912 case DW_TAG_subprogram:
2913 return "DW_TAG_subprogram";
2914 case DW_TAG_template_type_param:
2915 return "DW_TAG_template_type_param";
2916 case DW_TAG_template_value_param:
2917 return "DW_TAG_template_value_param";
2918 case DW_TAG_thrown_type:
2919 return "DW_TAG_thrown_type";
2920 case DW_TAG_try_block:
2921 return "DW_TAG_try_block";
2922 case DW_TAG_variant_part:
2923 return "DW_TAG_variant_part";
2924 case DW_TAG_variable:
2925 return "DW_TAG_variable";
2926 case DW_TAG_volatile_type:
2927 return "DW_TAG_volatile_type";
2928 case DW_TAG_MIPS_loop:
2929 return "DW_TAG_MIPS_loop";
2930 case DW_TAG_format_label:
2931 return "DW_TAG_format_label";
2932 case DW_TAG_function_template:
2933 return "DW_TAG_function_template";
2934 case DW_TAG_class_template:
2935 return "DW_TAG_class_template";
2937 return "DW_TAG_<unknown>";
2941 /* Convert a DWARF attribute code into its string name. */
2944 dwarf_attr_name (attr)
2945 register unsigned attr;
2950 return "DW_AT_sibling";
2951 case DW_AT_location:
2952 return "DW_AT_location";
2954 return "DW_AT_name";
2955 case DW_AT_ordering:
2956 return "DW_AT_ordering";
2957 case DW_AT_subscr_data:
2958 return "DW_AT_subscr_data";
2959 case DW_AT_byte_size:
2960 return "DW_AT_byte_size";
2961 case DW_AT_bit_offset:
2962 return "DW_AT_bit_offset";
2963 case DW_AT_bit_size:
2964 return "DW_AT_bit_size";
2965 case DW_AT_element_list:
2966 return "DW_AT_element_list";
2967 case DW_AT_stmt_list:
2968 return "DW_AT_stmt_list";
2970 return "DW_AT_low_pc";
2972 return "DW_AT_high_pc";
2973 case DW_AT_language:
2974 return "DW_AT_language";
2976 return "DW_AT_member";
2978 return "DW_AT_discr";
2979 case DW_AT_discr_value:
2980 return "DW_AT_discr_value";
2981 case DW_AT_visibility:
2982 return "DW_AT_visibility";
2984 return "DW_AT_import";
2985 case DW_AT_string_length:
2986 return "DW_AT_string_length";
2987 case DW_AT_common_reference:
2988 return "DW_AT_common_reference";
2989 case DW_AT_comp_dir:
2990 return "DW_AT_comp_dir";
2991 case DW_AT_const_value:
2992 return "DW_AT_const_value";
2993 case DW_AT_containing_type:
2994 return "DW_AT_containing_type";
2995 case DW_AT_default_value:
2996 return "DW_AT_default_value";
2998 return "DW_AT_inline";
2999 case DW_AT_is_optional:
3000 return "DW_AT_is_optional";
3001 case DW_AT_lower_bound:
3002 return "DW_AT_lower_bound";
3003 case DW_AT_producer:
3004 return "DW_AT_producer";
3005 case DW_AT_prototyped:
3006 return "DW_AT_prototyped";
3007 case DW_AT_return_addr:
3008 return "DW_AT_return_addr";
3009 case DW_AT_start_scope:
3010 return "DW_AT_start_scope";
3011 case DW_AT_stride_size:
3012 return "DW_AT_stride_size";
3013 case DW_AT_upper_bound:
3014 return "DW_AT_upper_bound";
3015 case DW_AT_abstract_origin:
3016 return "DW_AT_abstract_origin";
3017 case DW_AT_accessibility:
3018 return "DW_AT_accessibility";
3019 case DW_AT_address_class:
3020 return "DW_AT_address_class";
3021 case DW_AT_artificial:
3022 return "DW_AT_artificial";
3023 case DW_AT_base_types:
3024 return "DW_AT_base_types";
3025 case DW_AT_calling_convention:
3026 return "DW_AT_calling_convention";
3028 return "DW_AT_count";
3029 case DW_AT_data_member_location:
3030 return "DW_AT_data_member_location";
3031 case DW_AT_decl_column:
3032 return "DW_AT_decl_column";
3033 case DW_AT_decl_file:
3034 return "DW_AT_decl_file";
3035 case DW_AT_decl_line:
3036 return "DW_AT_decl_line";
3037 case DW_AT_declaration:
3038 return "DW_AT_declaration";
3039 case DW_AT_discr_list:
3040 return "DW_AT_discr_list";
3041 case DW_AT_encoding:
3042 return "DW_AT_encoding";
3043 case DW_AT_external:
3044 return "DW_AT_external";
3045 case DW_AT_frame_base:
3046 return "DW_AT_frame_base";
3048 return "DW_AT_friend";
3049 case DW_AT_identifier_case:
3050 return "DW_AT_identifier_case";
3051 case DW_AT_macro_info:
3052 return "DW_AT_macro_info";
3053 case DW_AT_namelist_items:
3054 return "DW_AT_namelist_items";
3055 case DW_AT_priority:
3056 return "DW_AT_priority";
3058 return "DW_AT_segment";
3059 case DW_AT_specification:
3060 return "DW_AT_specification";
3061 case DW_AT_static_link:
3062 return "DW_AT_static_link";
3064 return "DW_AT_type";
3065 case DW_AT_use_location:
3066 return "DW_AT_use_location";
3067 case DW_AT_variable_parameter:
3068 return "DW_AT_variable_parameter";
3069 case DW_AT_virtuality:
3070 return "DW_AT_virtuality";
3071 case DW_AT_vtable_elem_location:
3072 return "DW_AT_vtable_elem_location";
3074 case DW_AT_MIPS_fde:
3075 return "DW_AT_MIPS_fde";
3076 case DW_AT_MIPS_loop_begin:
3077 return "DW_AT_MIPS_loop_begin";
3078 case DW_AT_MIPS_tail_loop_begin:
3079 return "DW_AT_MIPS_tail_loop_begin";
3080 case DW_AT_MIPS_epilog_begin:
3081 return "DW_AT_MIPS_epilog_begin";
3082 case DW_AT_MIPS_loop_unroll_factor:
3083 return "DW_AT_MIPS_loop_unroll_factor";
3084 case DW_AT_MIPS_software_pipeline_depth:
3085 return "DW_AT_MIPS_software_pipeline_depth";
3086 case DW_AT_MIPS_linkage_name:
3087 return "DW_AT_MIPS_linkage_name";
3088 case DW_AT_MIPS_stride:
3089 return "DW_AT_MIPS_stride";
3090 case DW_AT_MIPS_abstract_name:
3091 return "DW_AT_MIPS_abstract_name";
3092 case DW_AT_MIPS_clone_origin:
3093 return "DW_AT_MIPS_clone_origin";
3094 case DW_AT_MIPS_has_inlines:
3095 return "DW_AT_MIPS_has_inlines";
3097 case DW_AT_sf_names:
3098 return "DW_AT_sf_names";
3099 case DW_AT_src_info:
3100 return "DW_AT_src_info";
3101 case DW_AT_mac_info:
3102 return "DW_AT_mac_info";
3103 case DW_AT_src_coords:
3104 return "DW_AT_src_coords";
3105 case DW_AT_body_begin:
3106 return "DW_AT_body_begin";
3107 case DW_AT_body_end:
3108 return "DW_AT_body_end";
3110 return "DW_AT_<unknown>";
3114 /* Convert a DWARF value form code into its string name. */
3117 dwarf_form_name (form)
3118 register unsigned form;
3123 return "DW_FORM_addr";
3124 case DW_FORM_block2:
3125 return "DW_FORM_block2";
3126 case DW_FORM_block4:
3127 return "DW_FORM_block4";
3129 return "DW_FORM_data2";
3131 return "DW_FORM_data4";
3133 return "DW_FORM_data8";
3134 case DW_FORM_string:
3135 return "DW_FORM_string";
3137 return "DW_FORM_block";
3138 case DW_FORM_block1:
3139 return "DW_FORM_block1";
3141 return "DW_FORM_data1";
3143 return "DW_FORM_flag";
3145 return "DW_FORM_sdata";
3147 return "DW_FORM_strp";
3149 return "DW_FORM_udata";
3150 case DW_FORM_ref_addr:
3151 return "DW_FORM_ref_addr";
3153 return "DW_FORM_ref1";
3155 return "DW_FORM_ref2";
3157 return "DW_FORM_ref4";
3159 return "DW_FORM_ref8";
3160 case DW_FORM_ref_udata:
3161 return "DW_FORM_ref_udata";
3162 case DW_FORM_indirect:
3163 return "DW_FORM_indirect";
3165 return "DW_FORM_<unknown>";
3169 /* Convert a DWARF stack opcode into its string name. */
3172 dwarf_stack_op_name (op)
3173 register unsigned op;
3178 return "DW_OP_addr";
3180 return "DW_OP_deref";
3182 return "DW_OP_const1u";
3184 return "DW_OP_const1s";
3186 return "DW_OP_const2u";
3188 return "DW_OP_const2s";
3190 return "DW_OP_const4u";
3192 return "DW_OP_const4s";
3194 return "DW_OP_const8u";
3196 return "DW_OP_const8s";
3198 return "DW_OP_constu";
3200 return "DW_OP_consts";
3204 return "DW_OP_drop";
3206 return "DW_OP_over";
3208 return "DW_OP_pick";
3210 return "DW_OP_swap";
3214 return "DW_OP_xderef";
3222 return "DW_OP_minus";
3234 return "DW_OP_plus";
3235 case DW_OP_plus_uconst:
3236 return "DW_OP_plus_uconst";
3242 return "DW_OP_shra";
3260 return "DW_OP_skip";
3262 return "DW_OP_lit0";
3264 return "DW_OP_lit1";
3266 return "DW_OP_lit2";
3268 return "DW_OP_lit3";
3270 return "DW_OP_lit4";
3272 return "DW_OP_lit5";
3274 return "DW_OP_lit6";
3276 return "DW_OP_lit7";
3278 return "DW_OP_lit8";
3280 return "DW_OP_lit9";
3282 return "DW_OP_lit10";
3284 return "DW_OP_lit11";
3286 return "DW_OP_lit12";
3288 return "DW_OP_lit13";
3290 return "DW_OP_lit14";
3292 return "DW_OP_lit15";
3294 return "DW_OP_lit16";
3296 return "DW_OP_lit17";
3298 return "DW_OP_lit18";
3300 return "DW_OP_lit19";
3302 return "DW_OP_lit20";
3304 return "DW_OP_lit21";
3306 return "DW_OP_lit22";
3308 return "DW_OP_lit23";
3310 return "DW_OP_lit24";
3312 return "DW_OP_lit25";
3314 return "DW_OP_lit26";
3316 return "DW_OP_lit27";
3318 return "DW_OP_lit28";
3320 return "DW_OP_lit29";
3322 return "DW_OP_lit30";
3324 return "DW_OP_lit31";
3326 return "DW_OP_reg0";
3328 return "DW_OP_reg1";
3330 return "DW_OP_reg2";
3332 return "DW_OP_reg3";
3334 return "DW_OP_reg4";
3336 return "DW_OP_reg5";
3338 return "DW_OP_reg6";
3340 return "DW_OP_reg7";
3342 return "DW_OP_reg8";
3344 return "DW_OP_reg9";
3346 return "DW_OP_reg10";
3348 return "DW_OP_reg11";
3350 return "DW_OP_reg12";
3352 return "DW_OP_reg13";
3354 return "DW_OP_reg14";
3356 return "DW_OP_reg15";
3358 return "DW_OP_reg16";
3360 return "DW_OP_reg17";
3362 return "DW_OP_reg18";
3364 return "DW_OP_reg19";
3366 return "DW_OP_reg20";
3368 return "DW_OP_reg21";
3370 return "DW_OP_reg22";
3372 return "DW_OP_reg23";
3374 return "DW_OP_reg24";
3376 return "DW_OP_reg25";
3378 return "DW_OP_reg26";
3380 return "DW_OP_reg27";
3382 return "DW_OP_reg28";
3384 return "DW_OP_reg29";
3386 return "DW_OP_reg30";
3388 return "DW_OP_reg31";
3390 return "DW_OP_breg0";
3392 return "DW_OP_breg1";
3394 return "DW_OP_breg2";
3396 return "DW_OP_breg3";
3398 return "DW_OP_breg4";
3400 return "DW_OP_breg5";
3402 return "DW_OP_breg6";
3404 return "DW_OP_breg7";
3406 return "DW_OP_breg8";
3408 return "DW_OP_breg9";
3410 return "DW_OP_breg10";
3412 return "DW_OP_breg11";
3414 return "DW_OP_breg12";
3416 return "DW_OP_breg13";
3418 return "DW_OP_breg14";
3420 return "DW_OP_breg15";
3422 return "DW_OP_breg16";
3424 return "DW_OP_breg17";
3426 return "DW_OP_breg18";
3428 return "DW_OP_breg19";
3430 return "DW_OP_breg20";
3432 return "DW_OP_breg21";
3434 return "DW_OP_breg22";
3436 return "DW_OP_breg23";
3438 return "DW_OP_breg24";
3440 return "DW_OP_breg25";
3442 return "DW_OP_breg26";
3444 return "DW_OP_breg27";
3446 return "DW_OP_breg28";
3448 return "DW_OP_breg29";
3450 return "DW_OP_breg30";
3452 return "DW_OP_breg31";
3454 return "DW_OP_regx";
3456 return "DW_OP_fbreg";
3458 return "DW_OP_bregx";
3460 return "DW_OP_piece";
3461 case DW_OP_deref_size:
3462 return "DW_OP_deref_size";
3463 case DW_OP_xderef_size:
3464 return "DW_OP_xderef_size";
3468 return "OP_<unknown>";
3472 /* Convert a DWARF type code into its string name. */
3475 dwarf_type_encoding_name (enc)
3476 register unsigned enc;
3480 case DW_ATE_address:
3481 return "DW_ATE_address";
3482 case DW_ATE_boolean:
3483 return "DW_ATE_boolean";
3484 case DW_ATE_complex_float:
3485 return "DW_ATE_complex_float";
3487 return "DW_ATE_float";
3489 return "DW_ATE_signed";
3490 case DW_ATE_signed_char:
3491 return "DW_ATE_signed_char";
3492 case DW_ATE_unsigned:
3493 return "DW_ATE_unsigned";
3494 case DW_ATE_unsigned_char:
3495 return "DW_ATE_unsigned_char";
3497 return "DW_ATE_<unknown>";
3501 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3502 instance of an inlined instance of a decl which is local to an inline
3503 function, so we have to trace all of the way back through the origin chain
3504 to find out what sort of node actually served as the original seed for the
3508 decl_ultimate_origin (decl)
3511 register tree immediate_origin = DECL_ABSTRACT_ORIGIN (decl);
3513 if (immediate_origin == NULL_TREE)
3517 register tree ret_val;
3518 register tree lookahead = immediate_origin;
3522 ret_val = lookahead;
3523 lookahead = DECL_ABSTRACT_ORIGIN (ret_val);
3525 while (lookahead != NULL && lookahead != ret_val);
3531 /* Determine the "ultimate origin" of a block. The block may be an inlined
3532 instance of an inlined instance of a block which is local to an inline
3533 function, so we have to trace all of the way back through the origin chain
3534 to find out what sort of node actually served as the original seed for the
3538 block_ultimate_origin (block)
3539 register tree block;
3541 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3543 if (immediate_origin == NULL_TREE)
3547 register tree ret_val;
3548 register tree lookahead = immediate_origin;
3552 ret_val = lookahead;
3553 lookahead = (TREE_CODE (ret_val) == BLOCK)
3554 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3557 while (lookahead != NULL && lookahead != ret_val);
3563 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3564 of a virtual function may refer to a base class, so we check the 'this'
3568 decl_class_context (decl)
3571 tree context = NULL_TREE;
3573 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3574 context = DECL_CONTEXT (decl);
3576 context = TYPE_MAIN_VARIANT
3577 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3579 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3580 context = NULL_TREE;
3585 /* Add an attribute/value pair to a DIE */
3588 add_dwarf_attr (die, attr)
3589 register dw_die_ref die;
3590 register dw_attr_ref attr;
3592 if (die != NULL && attr != NULL)
3594 if (die->die_attr == NULL)
3596 die->die_attr = attr;
3597 die->die_attr_last = attr;
3601 die->die_attr_last->dw_attr_next = attr;
3602 die->die_attr_last = attr;
3607 /* Add a flag value attribute to a DIE. */
3610 add_AT_flag (die, attr_kind, flag)
3611 register dw_die_ref die;
3612 register enum dwarf_attribute attr_kind;
3613 register unsigned flag;
3615 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3617 attr->dw_attr_next = NULL;
3618 attr->dw_attr = attr_kind;
3619 attr->dw_attr_val.val_class = dw_val_class_flag;
3620 attr->dw_attr_val.v.val_flag = flag;
3621 add_dwarf_attr (die, attr);
3624 /* Add a signed integer attribute value to a DIE. */
3627 add_AT_int (die, attr_kind, int_val)
3628 register dw_die_ref die;
3629 register enum dwarf_attribute attr_kind;
3630 register long int int_val;
3632 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3634 attr->dw_attr_next = NULL;
3635 attr->dw_attr = attr_kind;
3636 attr->dw_attr_val.val_class = dw_val_class_const;
3637 attr->dw_attr_val.v.val_int = int_val;
3638 add_dwarf_attr (die, attr);
3641 /* Add an unsigned integer attribute value to a DIE. */
3644 add_AT_unsigned (die, attr_kind, unsigned_val)
3645 register dw_die_ref die;
3646 register enum dwarf_attribute attr_kind;
3647 register unsigned long unsigned_val;
3649 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3651 attr->dw_attr_next = NULL;
3652 attr->dw_attr = attr_kind;
3653 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
3654 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3655 add_dwarf_attr (die, attr);
3658 /* Add an unsigned double integer attribute value to a DIE. */
3661 add_AT_long_long (die, attr_kind, val_hi, val_low)
3662 register dw_die_ref die;
3663 register enum dwarf_attribute attr_kind;
3664 register unsigned long val_hi;
3665 register unsigned long val_low;
3667 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3669 attr->dw_attr_next = NULL;
3670 attr->dw_attr = attr_kind;
3671 attr->dw_attr_val.val_class = dw_val_class_long_long;
3672 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3673 attr->dw_attr_val.v.val_long_long.low = val_low;
3674 add_dwarf_attr (die, attr);
3677 /* Add a floating point attribute value to a DIE and return it. */
3680 add_AT_float (die, attr_kind, length, array)
3681 register dw_die_ref die;
3682 register enum dwarf_attribute attr_kind;
3683 register unsigned length;
3684 register long *array;
3686 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3688 attr->dw_attr_next = NULL;
3689 attr->dw_attr = attr_kind;
3690 attr->dw_attr_val.val_class = dw_val_class_float;
3691 attr->dw_attr_val.v.val_float.length = length;
3692 attr->dw_attr_val.v.val_float.array = array;
3693 add_dwarf_attr (die, attr);
3696 /* Add a string attribute value to a DIE. */
3699 add_AT_string (die, attr_kind, str)
3700 register dw_die_ref die;
3701 register enum dwarf_attribute attr_kind;
3704 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3706 attr->dw_attr_next = NULL;
3707 attr->dw_attr = attr_kind;
3708 attr->dw_attr_val.val_class = dw_val_class_str;
3709 attr->dw_attr_val.v.val_str = xstrdup (str);
3710 add_dwarf_attr (die, attr);
3713 /* Add a DIE reference attribute value to a DIE. */
3716 add_AT_die_ref (die, attr_kind, targ_die)
3717 register dw_die_ref die;
3718 register enum dwarf_attribute attr_kind;
3719 register dw_die_ref targ_die;
3721 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3723 attr->dw_attr_next = NULL;
3724 attr->dw_attr = attr_kind;
3725 attr->dw_attr_val.val_class = dw_val_class_die_ref;
3726 attr->dw_attr_val.v.val_die_ref = targ_die;
3727 add_dwarf_attr (die, attr);
3730 /* Add an FDE reference attribute value to a DIE. */
3733 add_AT_fde_ref (die, attr_kind, targ_fde)
3734 register dw_die_ref die;
3735 register enum dwarf_attribute attr_kind;
3736 register unsigned targ_fde;
3738 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3740 attr->dw_attr_next = NULL;
3741 attr->dw_attr = attr_kind;
3742 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
3743 attr->dw_attr_val.v.val_fde_index = targ_fde;
3744 add_dwarf_attr (die, attr);
3747 /* Add a location description attribute value to a DIE. */
3750 add_AT_loc (die, attr_kind, loc)
3751 register dw_die_ref die;
3752 register enum dwarf_attribute attr_kind;
3753 register dw_loc_descr_ref loc;
3755 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3757 attr->dw_attr_next = NULL;
3758 attr->dw_attr = attr_kind;
3759 attr->dw_attr_val.val_class = dw_val_class_loc;
3760 attr->dw_attr_val.v.val_loc = loc;
3761 add_dwarf_attr (die, attr);
3764 /* Add an address constant attribute value to a DIE. */
3767 add_AT_addr (die, attr_kind, addr)
3768 register dw_die_ref die;
3769 register enum dwarf_attribute attr_kind;
3772 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3774 attr->dw_attr_next = NULL;
3775 attr->dw_attr = attr_kind;
3776 attr->dw_attr_val.val_class = dw_val_class_addr;
3777 attr->dw_attr_val.v.val_addr = addr;
3778 add_dwarf_attr (die, attr);
3781 /* Add a label identifier attribute value to a DIE. */
3784 add_AT_lbl_id (die, attr_kind, lbl_id)
3785 register dw_die_ref die;
3786 register enum dwarf_attribute attr_kind;
3787 register char *lbl_id;
3789 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3791 attr->dw_attr_next = NULL;
3792 attr->dw_attr = attr_kind;
3793 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3794 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3795 add_dwarf_attr (die, attr);
3798 /* Add a section offset attribute value to a DIE. */
3801 add_AT_section_offset (die, attr_kind, section)
3802 register dw_die_ref die;
3803 register enum dwarf_attribute attr_kind;
3804 register char *section;
3806 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3808 attr->dw_attr_next = NULL;
3809 attr->dw_attr = attr_kind;
3810 attr->dw_attr_val.val_class = dw_val_class_section_offset;
3811 attr->dw_attr_val.v.val_section = section;
3812 add_dwarf_attr (die, attr);
3816 /* Test if die refers to an external subroutine. */
3819 is_extern_subr_die (die)
3820 register dw_die_ref die;
3822 register dw_attr_ref a;
3823 register int is_subr = FALSE;
3824 register int is_extern = FALSE;
3826 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3829 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3831 if (a->dw_attr == DW_AT_external
3832 && a->dw_attr_val.val_class == dw_val_class_flag
3833 && a->dw_attr_val.v.val_flag != 0)
3841 return is_subr && is_extern;
3844 /* Get the attribute of type attr_kind. */
3846 static inline dw_attr_ref
3847 get_AT (die, attr_kind)
3848 register dw_die_ref die;
3849 register enum dwarf_attribute attr_kind;
3851 register dw_attr_ref a;
3852 register dw_die_ref spec = NULL;
3856 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3858 if (a->dw_attr == attr_kind)
3861 if (a->dw_attr == DW_AT_specification
3862 || a->dw_attr == DW_AT_abstract_origin)
3863 spec = a->dw_attr_val.v.val_die_ref;
3867 return get_AT (spec, attr_kind);
3873 /* Return the "low pc" attribute value, typically associated with
3874 a subprogram DIE. Return null if the "low pc" attribute is
3875 either not prsent, or if it cannot be represented as an
3876 assembler label identifier. */
3878 static inline char *
3880 register dw_die_ref die;
3882 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3884 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3885 return a->dw_attr_val.v.val_lbl_id;
3890 /* Return the "high pc" attribute value, typically associated with
3891 a subprogram DIE. Return null if the "high pc" attribute is
3892 either not prsent, or if it cannot be represented as an
3893 assembler label identifier. */
3895 static inline char *
3897 register dw_die_ref die;
3899 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
3901 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3902 return a->dw_attr_val.v.val_lbl_id;
3907 /* Return the value of the string attribute designated by ATTR_KIND, or
3908 NULL if it is not present. */
3910 static inline char *
3911 get_AT_string (die, attr_kind)
3912 register dw_die_ref die;
3913 register enum dwarf_attribute attr_kind;
3915 register dw_attr_ref a = get_AT (die, attr_kind);
3917 if (a && a->dw_attr_val.val_class == dw_val_class_str)
3918 return a->dw_attr_val.v.val_str;
3923 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3924 if it is not present. */
3927 get_AT_flag (die, attr_kind)
3928 register dw_die_ref die;
3929 register enum dwarf_attribute attr_kind;
3931 register dw_attr_ref a = get_AT (die, attr_kind);
3933 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
3934 return a->dw_attr_val.v.val_flag;
3939 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3940 if it is not present. */
3942 static inline unsigned
3943 get_AT_unsigned (die, attr_kind)
3944 register dw_die_ref die;
3945 register enum dwarf_attribute attr_kind;
3947 register dw_attr_ref a = get_AT (die, attr_kind);
3949 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
3950 return a->dw_attr_val.v.val_unsigned;
3958 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3960 return (lang == DW_LANG_C || lang == DW_LANG_C89
3961 || lang == DW_LANG_C_plus_plus);
3967 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3969 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
3972 /* Remove the specified attribute if present. */
3975 remove_AT (die, attr_kind)
3976 register dw_die_ref die;
3977 register enum dwarf_attribute attr_kind;
3979 register dw_attr_ref a;
3980 register dw_attr_ref removed = NULL;;
3984 if (die->die_attr->dw_attr == attr_kind)
3986 removed = die->die_attr;
3987 if (die->die_attr_last == die->die_attr)
3988 die->die_attr_last = NULL;
3990 die->die_attr = die->die_attr->dw_attr_next;
3994 for (a = die->die_attr; a->dw_attr_next != NULL;
3995 a = a->dw_attr_next)
3996 if (a->dw_attr_next->dw_attr == attr_kind)
3998 removed = a->dw_attr_next;
3999 if (die->die_attr_last == a->dw_attr_next)
4000 die->die_attr_last = a;
4002 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4011 /* Discard the children of this DIE. */
4014 remove_children (die)
4015 register dw_die_ref die;
4017 register dw_die_ref child_die = die->die_child;
4019 die->die_child = NULL;
4020 die->die_child_last = NULL;
4022 while (child_die != NULL)
4024 register dw_die_ref tmp_die = child_die;
4025 register dw_attr_ref a;
4027 child_die = child_die->die_sib;
4029 for (a = tmp_die->die_attr; a != NULL; )
4031 register dw_attr_ref tmp_a = a;
4033 a = a->dw_attr_next;
4041 /* Add a child DIE below its parent. */
4044 add_child_die (die, child_die)
4045 register dw_die_ref die;
4046 register dw_die_ref child_die;
4048 if (die != NULL && child_die != NULL)
4050 if (die == child_die)
4052 child_die->die_parent = die;
4053 child_die->die_sib = NULL;
4055 if (die->die_child == NULL)
4057 die->die_child = child_die;
4058 die->die_child_last = child_die;
4062 die->die_child_last->die_sib = child_die;
4063 die->die_child_last = child_die;
4068 /* Return a pointer to a newly created DIE node. */
4070 static inline dw_die_ref
4071 new_die (tag_value, parent_die)
4072 register enum dwarf_tag tag_value;
4073 register dw_die_ref parent_die;
4075 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4077 die->die_tag = tag_value;
4078 die->die_abbrev = 0;
4079 die->die_offset = 0;
4080 die->die_child = NULL;
4081 die->die_parent = NULL;
4082 die->die_sib = NULL;
4083 die->die_child_last = NULL;
4084 die->die_attr = NULL;
4085 die->die_attr_last = NULL;
4087 if (parent_die != NULL)
4088 add_child_die (parent_die, die);
4091 limbo_die_node *limbo_node;
4093 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4094 limbo_node->die = die;
4095 limbo_node->next = limbo_die_list;
4096 limbo_die_list = limbo_node;
4102 /* Return the DIE associated with the given type specifier. */
4104 static inline dw_die_ref
4105 lookup_type_die (type)
4108 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4111 /* Equate a DIE to a given type specifier. */
4114 equate_type_number_to_die (type, type_die)
4116 register dw_die_ref type_die;
4118 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4121 /* Return the DIE associated with a given declaration. */
4123 static inline dw_die_ref
4124 lookup_decl_die (decl)
4127 register unsigned decl_id = DECL_UID (decl);
4129 return (decl_id < decl_die_table_in_use
4130 ? decl_die_table[decl_id] : NULL);
4133 /* Equate a DIE to a particular declaration. */
4136 equate_decl_number_to_die (decl, decl_die)
4138 register dw_die_ref decl_die;
4140 register unsigned decl_id = DECL_UID (decl);
4141 register unsigned num_allocated;
4143 if (decl_id >= decl_die_table_allocated)
4146 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4147 / DECL_DIE_TABLE_INCREMENT)
4148 * DECL_DIE_TABLE_INCREMENT;
4151 = (dw_die_ref *) xrealloc (decl_die_table,
4152 sizeof (dw_die_ref) * num_allocated);
4154 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4155 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4156 decl_die_table_allocated = num_allocated;
4159 if (decl_id >= decl_die_table_in_use)
4160 decl_die_table_in_use = (decl_id + 1);
4162 decl_die_table[decl_id] = decl_die;
4165 /* Return a pointer to a newly allocated location description. Location
4166 descriptions are simple expression terms that can be strung
4167 together to form more complicated location (address) descriptions. */
4169 static inline dw_loc_descr_ref
4170 new_loc_descr (op, oprnd1, oprnd2)
4171 register enum dwarf_location_atom op;
4172 register unsigned long oprnd1;
4173 register unsigned long oprnd2;
4175 register dw_loc_descr_ref descr
4176 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4178 descr->dw_loc_next = NULL;
4179 descr->dw_loc_opc = op;
4180 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4181 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4182 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4183 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4188 /* Add a location description term to a location description expression. */
4191 add_loc_descr (list_head, descr)
4192 register dw_loc_descr_ref *list_head;
4193 register dw_loc_descr_ref descr;
4195 register dw_loc_descr_ref *d;
4197 /* Find the end of the chain. */
4198 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4204 /* Keep track of the number of spaces used to indent the
4205 output of the debugging routines that print the structure of
4206 the DIE internal representation. */
4207 static int print_indent;
4209 /* Indent the line the number of spaces given by print_indent. */
4212 print_spaces (outfile)
4215 fprintf (outfile, "%*s", print_indent, "");
4218 /* Print the information associated with a given DIE, and its children.
4219 This routine is a debugging aid only. */
4222 print_die (die, outfile)
4226 register dw_attr_ref a;
4227 register dw_die_ref c;
4229 print_spaces (outfile);
4230 fprintf (outfile, "DIE %4lu: %s\n",
4231 die->die_offset, dwarf_tag_name (die->die_tag));
4232 print_spaces (outfile);
4233 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4234 fprintf (outfile, " offset: %lu\n", die->die_offset);
4236 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4238 print_spaces (outfile);
4239 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4241 switch (a->dw_attr_val.val_class)
4243 case dw_val_class_addr:
4244 fprintf (outfile, "address");
4246 case dw_val_class_loc:
4247 fprintf (outfile, "location descriptor");
4249 case dw_val_class_const:
4250 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4252 case dw_val_class_unsigned_const:
4253 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4255 case dw_val_class_long_long:
4256 fprintf (outfile, "constant (%lu,%lu)",
4257 a->dw_attr_val.v.val_long_long.hi,
4258 a->dw_attr_val.v.val_long_long.low);
4260 case dw_val_class_float:
4261 fprintf (outfile, "floating-point constant");
4263 case dw_val_class_flag:
4264 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4266 case dw_val_class_die_ref:
4267 if (a->dw_attr_val.v.val_die_ref != NULL)
4268 fprintf (outfile, "die -> %lu",
4269 a->dw_attr_val.v.val_die_ref->die_offset);
4271 fprintf (outfile, "die -> <null>");
4273 case dw_val_class_lbl_id:
4274 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4276 case dw_val_class_section_offset:
4277 fprintf (outfile, "section: %s", a->dw_attr_val.v.val_section);
4279 case dw_val_class_str:
4280 if (a->dw_attr_val.v.val_str != NULL)
4281 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4283 fprintf (outfile, "<null>");
4289 fprintf (outfile, "\n");
4292 if (die->die_child != NULL)
4295 for (c = die->die_child; c != NULL; c = c->die_sib)
4296 print_die (c, outfile);
4302 /* Print the contents of the source code line number correspondence table.
4303 This routine is a debugging aid only. */
4306 print_dwarf_line_table (outfile)
4309 register unsigned i;
4310 register dw_line_info_ref line_info;
4312 fprintf (outfile, "\n\nDWARF source line information\n");
4313 for (i = 1; i < line_info_table_in_use; ++i)
4315 line_info = &line_info_table[i];
4316 fprintf (outfile, "%5d: ", i);
4317 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4318 fprintf (outfile, "%6ld", line_info->dw_line_num);
4319 fprintf (outfile, "\n");
4322 fprintf (outfile, "\n\n");
4325 /* Print the information collected for a given DIE. */
4328 debug_dwarf_die (die)
4331 print_die (die, stderr);
4334 /* Print all DWARF information collected for the compilation unit.
4335 This routine is a debugging aid only. */
4341 print_die (comp_unit_die, stderr);
4342 print_dwarf_line_table (stderr);
4345 /* Traverse the DIE, and add a sibling attribute if it may have the
4346 effect of speeding up access to siblings. To save some space,
4347 avoid generating sibling attributes for DIE's without children. */
4350 add_sibling_attributes(die)
4351 register dw_die_ref die;
4353 register dw_die_ref c;
4354 register dw_attr_ref attr;
4355 if (die != comp_unit_die && die->die_child != NULL)
4357 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4358 attr->dw_attr_next = NULL;
4359 attr->dw_attr = DW_AT_sibling;
4360 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4361 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4363 /* Add the sibling link to the front of the attribute list. */
4364 attr->dw_attr_next = die->die_attr;
4365 if (die->die_attr == NULL)
4366 die->die_attr_last = attr;
4368 die->die_attr = attr;
4371 for (c = die->die_child; c != NULL; c = c->die_sib)
4372 add_sibling_attributes (c);
4375 /* The format of each DIE (and its attribute value pairs)
4376 is encoded in an abbreviation table. This routine builds the
4377 abbreviation table and assigns a unique abbreviation id for
4378 each abbreviation entry. The children of each die are visited
4382 build_abbrev_table (die)
4383 register dw_die_ref die;
4385 register unsigned long abbrev_id;
4386 register unsigned long n_alloc;
4387 register dw_die_ref c;
4388 register dw_attr_ref d_attr, a_attr;
4389 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4391 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4393 if (abbrev->die_tag == die->die_tag)
4395 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4397 a_attr = abbrev->die_attr;
4398 d_attr = die->die_attr;
4400 while (a_attr != NULL && d_attr != NULL)
4402 if ((a_attr->dw_attr != d_attr->dw_attr)
4403 || (value_format (&a_attr->dw_attr_val)
4404 != value_format (&d_attr->dw_attr_val)))
4407 a_attr = a_attr->dw_attr_next;
4408 d_attr = d_attr->dw_attr_next;
4411 if (a_attr == NULL && d_attr == NULL)
4417 if (abbrev_id >= abbrev_die_table_in_use)
4419 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4421 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4423 = (dw_die_ref *) xrealloc (abbrev_die_table,
4424 sizeof (dw_die_ref) * n_alloc);
4426 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4427 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4428 abbrev_die_table_allocated = n_alloc;
4431 ++abbrev_die_table_in_use;
4432 abbrev_die_table[abbrev_id] = die;
4435 die->die_abbrev = abbrev_id;
4436 for (c = die->die_child; c != NULL; c = c->die_sib)
4437 build_abbrev_table (c);
4440 /* Return the size of a string, including the null byte. */
4442 static unsigned long
4443 size_of_string (str)
4446 register unsigned long size = 0;
4447 register unsigned long slen = strlen (str);
4448 register unsigned long i;
4449 register unsigned c;
4451 for (i = 0; i < slen; ++i)
4460 /* Null terminator. */
4465 /* Return the size of a location descriptor. */
4467 static unsigned long
4468 size_of_loc_descr (loc)
4469 register dw_loc_descr_ref loc;
4471 register unsigned long size = 1;
4473 switch (loc->dw_loc_opc)
4495 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4498 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4503 case DW_OP_plus_uconst:
4504 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4542 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4545 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4548 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4551 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4552 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4555 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4557 case DW_OP_deref_size:
4558 case DW_OP_xderef_size:
4568 /* Return the size of a series of location descriptors. */
4570 static unsigned long
4572 register dw_loc_descr_ref loc;
4574 register unsigned long size = 0;
4576 for (; loc != NULL; loc = loc->dw_loc_next)
4577 size += size_of_loc_descr (loc);
4582 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4585 constant_size (value)
4586 long unsigned value;
4593 log = floor_log2 (value);
4596 log = 1 << (floor_log2 (log) + 1);
4601 /* Return the size of a DIE, as it is represented in the
4602 .debug_info section. */
4604 static unsigned long
4606 register dw_die_ref die;
4608 register unsigned long size = 0;
4609 register dw_attr_ref a;
4611 size += size_of_uleb128 (die->die_abbrev);
4612 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4614 switch (a->dw_attr_val.val_class)
4616 case dw_val_class_addr:
4619 case dw_val_class_loc:
4621 register unsigned long lsize
4622 = size_of_locs (a->dw_attr_val.v.val_loc);
4625 size += constant_size (lsize);
4629 case dw_val_class_const:
4632 case dw_val_class_unsigned_const:
4633 size += constant_size (a->dw_attr_val.v.val_unsigned);
4635 case dw_val_class_long_long:
4636 size += 1 + 8; /* block */
4638 case dw_val_class_float:
4639 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4641 case dw_val_class_flag:
4644 case dw_val_class_die_ref:
4645 size += DWARF_OFFSET_SIZE;
4647 case dw_val_class_fde_ref:
4648 size += DWARF_OFFSET_SIZE;
4650 case dw_val_class_lbl_id:
4653 case dw_val_class_section_offset:
4654 size += DWARF_OFFSET_SIZE;
4656 case dw_val_class_str:
4657 size += size_of_string (a->dw_attr_val.v.val_str);
4667 /* Size the debugging information associated with a given DIE.
4668 Visits the DIE's children recursively. Updates the global
4669 variable next_die_offset, on each time through. Uses the
4670 current value of next_die_offset to update the die_offset
4671 field in each DIE. */
4674 calc_die_sizes (die)
4677 register dw_die_ref c;
4678 die->die_offset = next_die_offset;
4679 next_die_offset += size_of_die (die);
4681 for (c = die->die_child; c != NULL; c = c->die_sib)
4684 if (die->die_child != NULL)
4685 /* Count the null byte used to terminate sibling lists. */
4686 next_die_offset += 1;
4689 /* Return the size of the line information prolog generated for the
4690 compilation unit. */
4692 static unsigned long
4693 size_of_line_prolog ()
4695 register unsigned long size;
4696 register unsigned long ft_index;
4698 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4700 /* Count the size of the table giving number of args for each
4702 size += DWARF_LINE_OPCODE_BASE - 1;
4704 /* Include directory table is empty (at present). Count only the
4705 null byte used to terminate the table. */
4708 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4710 /* File name entry. */
4711 size += size_of_string (file_table[ft_index]);
4713 /* Include directory index. */
4714 size += size_of_uleb128 (0);
4716 /* Modification time. */
4717 size += size_of_uleb128 (0);
4719 /* File length in bytes. */
4720 size += size_of_uleb128 (0);
4723 /* Count the file table terminator. */
4728 /* Return the size of the line information generated for this
4729 compilation unit. */
4731 static unsigned long
4732 size_of_line_info ()
4734 register unsigned long size;
4735 register unsigned long lt_index;
4736 register unsigned long current_line;
4737 register long line_offset;
4738 register long line_delta;
4739 register unsigned long current_file;
4740 register unsigned long function;
4741 unsigned long size_of_set_address;
4743 /* Size of a DW_LNE_set_address instruction. */
4744 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4746 /* Version number. */
4749 /* Prolog length specifier. */
4750 size += DWARF_OFFSET_SIZE;
4753 size += size_of_line_prolog ();
4755 /* Set address register instruction. */
4756 size += size_of_set_address;
4760 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4762 register dw_line_info_ref line_info;
4764 /* Advance pc instruction. */
4765 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4769 size += size_of_set_address;
4771 line_info = &line_info_table[lt_index];
4772 if (line_info->dw_file_num != current_file)
4774 /* Set file number instruction. */
4776 current_file = line_info->dw_file_num;
4777 size += size_of_uleb128 (current_file);
4780 if (line_info->dw_line_num != current_line)
4782 line_offset = line_info->dw_line_num - current_line;
4783 line_delta = line_offset - DWARF_LINE_BASE;
4784 current_line = line_info->dw_line_num;
4785 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4786 /* 1-byte special line number instruction. */
4790 /* Advance line instruction. */
4792 size += size_of_sleb128 (line_offset);
4793 /* Generate line entry instruction. */
4799 /* Advance pc instruction. */
4803 size += size_of_set_address;
4805 /* End of line number info. marker. */
4806 size += 1 + size_of_uleb128 (1) + 1;
4811 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4813 register dw_separate_line_info_ref line_info
4814 = &separate_line_info_table[lt_index];
4815 if (function != line_info->function)
4817 function = line_info->function;
4818 /* Set address register instruction. */
4819 size += size_of_set_address;
4823 /* Advance pc instruction. */
4827 size += size_of_set_address;
4830 if (line_info->dw_file_num != current_file)
4832 /* Set file number instruction. */
4834 current_file = line_info->dw_file_num;
4835 size += size_of_uleb128 (current_file);
4838 if (line_info->dw_line_num != current_line)
4840 line_offset = line_info->dw_line_num - current_line;
4841 line_delta = line_offset - DWARF_LINE_BASE;
4842 current_line = line_info->dw_line_num;
4843 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4844 /* 1-byte special line number instruction. */
4848 /* Advance line instruction. */
4850 size += size_of_sleb128 (line_offset);
4852 /* Generate line entry instruction. */
4859 /* If we're done with a function, end its sequence. */
4860 if (lt_index == separate_line_info_table_in_use
4861 || separate_line_info_table[lt_index].function != function)
4866 /* Advance pc instruction. */
4870 size += size_of_set_address;
4872 /* End of line number info. marker. */
4873 size += 1 + size_of_uleb128 (1) + 1;
4880 /* Return the size of the .debug_pubnames table generated for the
4881 compilation unit. */
4883 static unsigned long
4886 register unsigned long size;
4887 register unsigned i;
4889 size = DWARF_PUBNAMES_HEADER_SIZE;
4890 for (i = 0; i < pubname_table_in_use; ++i)
4892 register pubname_ref p = &pubname_table[i];
4893 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4896 size += DWARF_OFFSET_SIZE;
4900 /* Return the size of the information in the .debug_aranges section. */
4902 static unsigned long
4905 register unsigned long size;
4907 size = DWARF_ARANGES_HEADER_SIZE;
4909 /* Count the address/length pair for this compilation unit. */
4910 size += 2 * PTR_SIZE;
4911 size += 2 * PTR_SIZE * arange_table_in_use;
4913 /* Count the two zero words used to terminated the address range table. */
4914 size += 2 * PTR_SIZE;
4918 /* Select the encoding of an attribute value. */
4920 static enum dwarf_form
4924 switch (v->val_class)
4926 case dw_val_class_addr:
4927 return DW_FORM_addr;
4928 case dw_val_class_loc:
4929 switch (constant_size (size_of_locs (v->v.val_loc)))
4932 return DW_FORM_block1;
4934 return DW_FORM_block2;
4938 case dw_val_class_const:
4939 return DW_FORM_data4;
4940 case dw_val_class_unsigned_const:
4941 switch (constant_size (v->v.val_unsigned))
4944 return DW_FORM_data1;
4946 return DW_FORM_data2;
4948 return DW_FORM_data4;
4950 return DW_FORM_data8;
4954 case dw_val_class_long_long:
4955 return DW_FORM_block1;
4956 case dw_val_class_float:
4957 return DW_FORM_block1;
4958 case dw_val_class_flag:
4959 return DW_FORM_flag;
4960 case dw_val_class_die_ref:
4962 case dw_val_class_fde_ref:
4963 return DW_FORM_data;
4964 case dw_val_class_lbl_id:
4965 return DW_FORM_addr;
4966 case dw_val_class_section_offset:
4967 return DW_FORM_data;
4968 case dw_val_class_str:
4969 return DW_FORM_string;
4975 /* Output the encoding of an attribute value. */
4978 output_value_format (v)
4981 enum dwarf_form form = value_format (v);
4983 output_uleb128 (form);
4985 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
4987 fputc ('\n', asm_out_file);
4990 /* Output the .debug_abbrev section which defines the DIE abbreviation
4994 output_abbrev_section ()
4996 unsigned long abbrev_id;
4999 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5001 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5003 output_uleb128 (abbrev_id);
5005 fprintf (asm_out_file, " (abbrev code)");
5007 fputc ('\n', asm_out_file);
5008 output_uleb128 (abbrev->die_tag);
5010 fprintf (asm_out_file, " (TAG: %s)",
5011 dwarf_tag_name (abbrev->die_tag));
5013 fputc ('\n', asm_out_file);
5014 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5015 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5018 fprintf (asm_out_file, "\t%s %s",
5020 (abbrev->die_child != NULL
5021 ? "DW_children_yes" : "DW_children_no"));
5023 fputc ('\n', asm_out_file);
5025 for (a_attr = abbrev->die_attr; a_attr != NULL;
5026 a_attr = a_attr->dw_attr_next)
5028 output_uleb128 (a_attr->dw_attr);
5030 fprintf (asm_out_file, " (%s)",
5031 dwarf_attr_name (a_attr->dw_attr));
5033 fputc ('\n', asm_out_file);
5034 output_value_format (&a_attr->dw_attr_val);
5037 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5041 /* Output location description stack opcode's operands (if any). */
5044 output_loc_operands (loc)
5045 register dw_loc_descr_ref loc;
5047 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5048 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5050 switch (loc->dw_loc_opc)
5053 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5054 fputc ('\n', asm_out_file);
5058 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5059 fputc ('\n', asm_out_file);
5063 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5064 fputc ('\n', asm_out_file);
5068 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5069 fputc ('\n', asm_out_file);
5074 fputc ('\n', asm_out_file);
5077 output_uleb128 (val1->v.val_unsigned);
5078 fputc ('\n', asm_out_file);
5081 output_sleb128 (val1->v.val_int);
5082 fputc ('\n', asm_out_file);
5085 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5086 fputc ('\n', asm_out_file);
5088 case DW_OP_plus_uconst:
5089 output_uleb128 (val1->v.val_unsigned);
5090 fputc ('\n', asm_out_file);
5094 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5095 fputc ('\n', asm_out_file);
5129 output_sleb128 (val1->v.val_int);
5130 fputc ('\n', asm_out_file);
5133 output_uleb128 (val1->v.val_unsigned);
5134 fputc ('\n', asm_out_file);
5137 output_sleb128 (val1->v.val_int);
5138 fputc ('\n', asm_out_file);
5141 output_uleb128 (val1->v.val_unsigned);
5142 fputc ('\n', asm_out_file);
5143 output_sleb128 (val2->v.val_int);
5144 fputc ('\n', asm_out_file);
5147 output_uleb128 (val1->v.val_unsigned);
5148 fputc ('\n', asm_out_file);
5150 case DW_OP_deref_size:
5151 case DW_OP_xderef_size:
5152 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5153 fputc ('\n', asm_out_file);
5160 /* Compute the offset of a sibling. */
5162 static unsigned long
5163 sibling_offset (die)
5166 unsigned long offset;
5168 if (die->die_child_last == NULL)
5169 offset = die->die_offset + size_of_die (die);
5171 offset = sibling_offset (die->die_child_last) + 1;
5176 /* Output the DIE and its attributes. Called recursively to generate
5177 the definitions of each child DIE. */
5181 register dw_die_ref die;
5183 register dw_attr_ref a;
5184 register dw_die_ref c;
5185 register unsigned long ref_offset;
5186 register unsigned long size;
5187 register dw_loc_descr_ref loc;
5190 output_uleb128 (die->die_abbrev);
5192 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5193 die->die_offset, dwarf_tag_name (die->die_tag));
5195 fputc ('\n', asm_out_file);
5197 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5199 switch (a->dw_attr_val.val_class)
5201 case dw_val_class_addr:
5202 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5203 a->dw_attr_val.v.val_addr);
5206 case dw_val_class_loc:
5207 size = size_of_locs (a->dw_attr_val.v.val_loc);
5209 /* Output the block length for this list of location operations. */
5210 switch (constant_size (size))
5213 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5216 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5223 fprintf (asm_out_file, "\t%s %s",
5224 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5226 fputc ('\n', asm_out_file);
5227 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5228 loc = loc->dw_loc_next)
5230 /* Output the opcode. */
5231 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5233 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5234 dwarf_stack_op_name (loc->dw_loc_opc));
5236 fputc ('\n', asm_out_file);
5238 /* Output the operand(s) (if any). */
5239 output_loc_operands (loc);
5243 case dw_val_class_const:
5244 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5247 case dw_val_class_unsigned_const:
5248 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5251 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5252 a->dw_attr_val.v.val_unsigned);
5255 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5256 a->dw_attr_val.v.val_unsigned);
5259 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5260 a->dw_attr_val.v.val_unsigned);
5263 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5264 a->dw_attr_val.v.val_long_long.hi,
5265 a->dw_attr_val.v.val_long_long.low);
5272 case dw_val_class_long_long:
5273 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5275 fprintf (asm_out_file, "\t%s %s",
5276 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5278 fputc ('\n', asm_out_file);
5279 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5280 a->dw_attr_val.v.val_long_long.hi,
5281 a->dw_attr_val.v.val_long_long.low);
5284 fprintf (asm_out_file,
5285 "\t%s long long constant", ASM_COMMENT_START);
5287 fputc ('\n', asm_out_file);
5290 case dw_val_class_float:
5291 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5292 a->dw_attr_val.v.val_float.length * 4);
5294 fprintf (asm_out_file, "\t%s %s",
5295 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5297 fputc ('\n', asm_out_file);
5298 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5300 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5301 a->dw_attr_val.v.val_float.array[i]);
5303 fprintf (asm_out_file, "\t%s fp constant word %d",
5304 ASM_COMMENT_START, i);
5306 fputc ('\n', asm_out_file);
5310 case dw_val_class_flag:
5311 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5314 case dw_val_class_die_ref:
5315 if (a->dw_attr_val.v.val_die_ref != NULL)
5316 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5317 else if (a->dw_attr == DW_AT_sibling)
5318 ref_offset = sibling_offset(die);
5322 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5325 case dw_val_class_fde_ref:
5328 ASM_GENERATE_INTERNAL_LABEL
5329 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5330 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5331 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5335 case dw_val_class_lbl_id:
5336 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5339 case dw_val_class_section_offset:
5340 ASM_OUTPUT_DWARF_OFFSET (asm_out_file,
5342 (a->dw_attr_val.v.val_section));
5345 case dw_val_class_str:
5347 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5349 ASM_OUTPUT_ASCII (asm_out_file,
5350 a->dw_attr_val.v.val_str,
5351 strlen (a->dw_attr_val.v.val_str) + 1);
5358 if (a->dw_attr_val.val_class != dw_val_class_loc
5359 && a->dw_attr_val.val_class != dw_val_class_long_long
5360 && a->dw_attr_val.val_class != dw_val_class_float)
5363 fprintf (asm_out_file, "\t%s %s",
5364 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5366 fputc ('\n', asm_out_file);
5370 for (c = die->die_child; c != NULL; c = c->die_sib)
5373 if (die->die_child != NULL)
5375 /* Add null byte to terminate sibling list. */
5376 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5378 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5379 ASM_COMMENT_START, die->die_offset);
5381 fputc ('\n', asm_out_file);
5385 /* Output the compilation unit that appears at the beginning of the
5386 .debug_info section, and precedes the DIE descriptions. */
5389 output_compilation_unit_header ()
5391 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5393 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5396 fputc ('\n', asm_out_file);
5397 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5399 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5401 fputc ('\n', asm_out_file);
5402 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (ABBREV_SECTION));
5404 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5407 fputc ('\n', asm_out_file);
5408 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5410 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5412 fputc ('\n', asm_out_file);
5415 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5416 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5417 argument list, and maybe the scope. */
5420 dwarf2_name (decl, scope)
5424 return (*decl_printable_name) (decl, scope ? 1 : 0);
5427 /* Add a new entry to .debug_pubnames if appropriate. */
5430 add_pubname (decl, die)
5436 if (! TREE_PUBLIC (decl))
5439 if (pubname_table_in_use == pubname_table_allocated)
5441 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5442 pubname_table = (pubname_ref) xrealloc
5443 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5446 p = &pubname_table[pubname_table_in_use++];
5449 p->name = xstrdup (dwarf2_name (decl, 1));
5452 /* Output the public names table used to speed up access to externally
5453 visible names. For now, only generate entries for externally
5454 visible procedures. */
5459 register unsigned i;
5460 register unsigned long pubnames_length = size_of_pubnames ();
5462 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5465 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5468 fputc ('\n', asm_out_file);
5469 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5472 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5474 fputc ('\n', asm_out_file);
5475 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5477 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5480 fputc ('\n', asm_out_file);
5481 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5483 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5485 fputc ('\n', asm_out_file);
5486 for (i = 0; i < pubname_table_in_use; ++i)
5488 register pubname_ref pub = &pubname_table[i];
5490 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5492 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5494 fputc ('\n', asm_out_file);
5498 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5499 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5503 ASM_OUTPUT_ASCII (asm_out_file, pub->name, strlen (pub->name) + 1);
5506 fputc ('\n', asm_out_file);
5509 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5510 fputc ('\n', asm_out_file);
5513 /* Add a new entry to .debug_aranges if appropriate. */
5516 add_arange (decl, die)
5520 if (! DECL_SECTION_NAME (decl))
5523 if (arange_table_in_use == arange_table_allocated)
5525 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5527 = (arange_ref) xrealloc (arange_table,
5528 arange_table_allocated * sizeof (dw_die_ref));
5531 arange_table[arange_table_in_use++] = die;
5534 /* Output the information that goes into the .debug_aranges table.
5535 Namely, define the beginning and ending address range of the
5536 text section generated for this compilation unit. */
5541 register unsigned i;
5542 register unsigned long aranges_length = size_of_aranges ();
5544 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5546 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5549 fputc ('\n', asm_out_file);
5550 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5552 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5554 fputc ('\n', asm_out_file);
5555 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5557 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5560 fputc ('\n', asm_out_file);
5561 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5563 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5565 fputc ('\n', asm_out_file);
5566 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5568 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5571 fputc ('\n', asm_out_file);
5572 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
5574 fprintf (asm_out_file, ",0,0");
5577 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5578 ASM_COMMENT_START, 2 * PTR_SIZE);
5580 fputc ('\n', asm_out_file);
5581 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
5583 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5585 fputc ('\n', asm_out_file);
5586 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label, TEXT_SECTION);
5588 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5590 fputc ('\n', asm_out_file);
5591 for (i = 0; i < arange_table_in_use; ++i)
5593 dw_die_ref a = arange_table[i];
5595 if (a->die_tag == DW_TAG_subprogram)
5596 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
5599 char *name = get_AT_string (a, DW_AT_MIPS_linkage_name);
5601 name = get_AT_string (a, DW_AT_name);
5603 ASM_OUTPUT_DWARF_ADDR (asm_out_file, name);
5607 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5609 fputc ('\n', asm_out_file);
5610 if (a->die_tag == DW_TAG_subprogram)
5611 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
5614 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5615 get_AT_unsigned (a, DW_AT_byte_size));
5618 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5620 fputc ('\n', asm_out_file);
5623 /* Output the terminator words. */
5624 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5625 fputc ('\n', asm_out_file);
5626 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5627 fputc ('\n', asm_out_file);
5630 /* Output the source line number correspondence information. This
5631 information goes into the .debug_line section.
5633 If the format of this data changes, then the function size_of_line_info
5634 must also be adjusted the same way. */
5639 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5640 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5641 register unsigned opc;
5642 register unsigned n_op_args;
5643 register unsigned long ft_index;
5644 register unsigned long lt_index;
5645 register unsigned long current_line;
5646 register long line_offset;
5647 register long line_delta;
5648 register unsigned long current_file;
5649 register unsigned long function;
5651 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5653 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5656 fputc ('\n', asm_out_file);
5657 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5659 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5661 fputc ('\n', asm_out_file);
5662 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5664 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5666 fputc ('\n', asm_out_file);
5667 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5669 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5672 fputc ('\n', asm_out_file);
5673 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5675 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5678 fputc ('\n', asm_out_file);
5679 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5681 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5684 fputc ('\n', asm_out_file);
5685 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5687 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5690 fputc ('\n', asm_out_file);
5691 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5693 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5695 fputc ('\n', asm_out_file);
5696 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5700 case DW_LNS_advance_pc:
5701 case DW_LNS_advance_line:
5702 case DW_LNS_set_file:
5703 case DW_LNS_set_column:
5704 case DW_LNS_fixed_advance_pc:
5711 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5713 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5714 ASM_COMMENT_START, opc, n_op_args);
5715 fputc ('\n', asm_out_file);
5719 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5721 /* Include directory table is empty, at present */
5722 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5723 fputc ('\n', asm_out_file);
5725 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5727 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5731 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5732 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5733 ASM_COMMENT_START, ft_index);
5737 ASM_OUTPUT_ASCII (asm_out_file,
5738 file_table[ft_index],
5739 strlen (file_table[ft_index]) + 1);
5742 fputc ('\n', asm_out_file);
5744 /* Include directory index */
5746 fputc ('\n', asm_out_file);
5748 /* Modification time */
5750 fputc ('\n', asm_out_file);
5752 /* File length in bytes */
5754 fputc ('\n', asm_out_file);
5757 /* Terminate the file name table */
5758 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5759 fputc ('\n', asm_out_file);
5761 /* Set the address register to the first location in the text section */
5762 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5764 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5766 fputc ('\n', asm_out_file);
5767 output_uleb128 (1 + PTR_SIZE);
5768 fputc ('\n', asm_out_file);
5769 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5770 fputc ('\n', asm_out_file);
5771 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
5772 fputc ('\n', asm_out_file);
5774 /* Generate the line number to PC correspondence table, encoded as
5775 a series of state machine operations. */
5778 strcpy (prev_line_label, TEXT_SECTION);
5779 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5781 register dw_line_info_ref line_info;
5783 /* Emit debug info for the address of the current line, choosing
5784 the encoding that uses the least amount of space. */
5785 /* ??? Unfortunately, we have little choice here currently, and must
5786 always use the most general form. Gcc does not know the address
5787 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5788 dwarf2 aware assemblers at this time, so we can't use any special
5789 pseudo ops that would allow the assembler to optimally encode this for
5790 us. Many ports do have length attributes which will give an upper
5791 bound on the address range. We could perhaps use length attributes
5792 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5793 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5796 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5797 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5799 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5802 fputc ('\n', asm_out_file);
5803 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5804 fputc ('\n', asm_out_file);
5808 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5809 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5811 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5813 fputc ('\n', asm_out_file);
5814 output_uleb128 (1 + PTR_SIZE);
5815 fputc ('\n', asm_out_file);
5816 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5817 fputc ('\n', asm_out_file);
5818 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5819 fputc ('\n', asm_out_file);
5821 strcpy (prev_line_label, line_label);
5823 /* Emit debug info for the source file of the current line, if
5824 different from the previous line. */
5825 line_info = &line_info_table[lt_index];
5826 if (line_info->dw_file_num != current_file)
5828 current_file = line_info->dw_file_num;
5829 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5831 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5833 fputc ('\n', asm_out_file);
5834 output_uleb128 (current_file);
5836 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5838 fputc ('\n', asm_out_file);
5841 /* Emit debug info for the current line number, choosing the encoding
5842 that uses the least amount of space. */
5843 line_offset = line_info->dw_line_num - current_line;
5844 line_delta = line_offset - DWARF_LINE_BASE;
5845 current_line = line_info->dw_line_num;
5846 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5848 /* This can handle deltas from -10 to 234, using the current
5849 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5851 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5852 DWARF_LINE_OPCODE_BASE + line_delta);
5854 fprintf (asm_out_file,
5855 "\t%s line %ld", ASM_COMMENT_START, current_line);
5857 fputc ('\n', asm_out_file);
5861 /* This can handle any delta. This takes at least 4 bytes, depending
5862 on the value being encoded. */
5863 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5865 fprintf (asm_out_file, "\t%s advance to line %ld",
5866 ASM_COMMENT_START, current_line);
5868 fputc ('\n', asm_out_file);
5869 output_sleb128 (line_offset);
5870 fputc ('\n', asm_out_file);
5871 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5872 fputc ('\n', asm_out_file);
5876 /* Emit debug info for the address of the end of the function. */
5879 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5881 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5884 fputc ('\n', asm_out_file);
5885 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
5886 fputc ('\n', asm_out_file);
5890 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5892 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5893 fputc ('\n', asm_out_file);
5894 output_uleb128 (1 + PTR_SIZE);
5895 fputc ('\n', asm_out_file);
5896 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5897 fputc ('\n', asm_out_file);
5898 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
5899 fputc ('\n', asm_out_file);
5902 /* Output the marker for the end of the line number info. */
5903 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5905 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
5907 fputc ('\n', asm_out_file);
5909 fputc ('\n', asm_out_file);
5910 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
5911 fputc ('\n', asm_out_file);
5916 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
5918 register dw_separate_line_info_ref line_info
5919 = &separate_line_info_table[lt_index];
5921 /* Emit debug info for the address of the current line. If this is
5922 a new function, or the first line of a function, then we need
5923 to handle it differently. */
5924 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
5926 if (function != line_info->function)
5928 function = line_info->function;
5930 /* Set the address register to the first line in the function */
5931 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5933 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5936 fputc ('\n', asm_out_file);
5937 output_uleb128 (1 + PTR_SIZE);
5938 fputc ('\n', asm_out_file);
5939 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5940 fputc ('\n', asm_out_file);
5941 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5942 fputc ('\n', asm_out_file);
5946 /* ??? See the DW_LNS_advance_pc comment above. */
5949 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5951 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5954 fputc ('\n', asm_out_file);
5955 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
5957 fputc ('\n', asm_out_file);
5961 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5963 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5965 fputc ('\n', asm_out_file);
5966 output_uleb128 (1 + PTR_SIZE);
5967 fputc ('\n', asm_out_file);
5968 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5969 fputc ('\n', asm_out_file);
5970 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5971 fputc ('\n', asm_out_file);
5974 strcpy (prev_line_label, line_label);
5976 /* Emit debug info for the source file of the current line, if
5977 different from the previous line. */
5978 if (line_info->dw_file_num != current_file)
5980 current_file = line_info->dw_file_num;
5981 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5983 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5985 fputc ('\n', asm_out_file);
5986 output_uleb128 (current_file);
5988 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5990 fputc ('\n', asm_out_file);
5993 /* Emit debug info for the current line number, choosing the encoding
5994 that uses the least amount of space. */
5995 if (line_info->dw_line_num != current_line)
5997 line_offset = line_info->dw_line_num - current_line;
5998 line_delta = line_offset - DWARF_LINE_BASE;
5999 current_line = line_info->dw_line_num;
6000 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6002 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6003 DWARF_LINE_OPCODE_BASE + line_delta);
6005 fprintf (asm_out_file,
6006 "\t%s line %ld", ASM_COMMENT_START, current_line);
6008 fputc ('\n', asm_out_file);
6012 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6014 fprintf (asm_out_file, "\t%s advance to line %ld",
6015 ASM_COMMENT_START, current_line);
6017 fputc ('\n', asm_out_file);
6018 output_sleb128 (line_offset);
6019 fputc ('\n', asm_out_file);
6020 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6021 fputc ('\n', asm_out_file);
6027 /* If we're done with a function, end its sequence. */
6028 if (lt_index == separate_line_info_table_in_use
6029 || separate_line_info_table[lt_index].function != function)
6034 /* Emit debug info for the address of the end of the function. */
6035 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6038 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6040 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6043 fputc ('\n', asm_out_file);
6044 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6046 fputc ('\n', asm_out_file);
6050 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6052 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6054 fputc ('\n', asm_out_file);
6055 output_uleb128 (1 + PTR_SIZE);
6056 fputc ('\n', asm_out_file);
6057 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6058 fputc ('\n', asm_out_file);
6059 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6060 fputc ('\n', asm_out_file);
6063 /* Output the marker for the end of this sequence. */
6064 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6066 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6069 fputc ('\n', asm_out_file);
6071 fputc ('\n', asm_out_file);
6072 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6073 fputc ('\n', asm_out_file);
6078 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6079 in question represents the outermost pair of curly braces (i.e. the "body
6080 block") of a function or method.
6082 For any BLOCK node representing a "body block" of a function or method, the
6083 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6084 represents the outermost (function) scope for the function or method (i.e.
6085 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6086 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6089 is_body_block (stmt)
6092 if (TREE_CODE (stmt) == BLOCK)
6094 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6096 if (TREE_CODE (parent) == BLOCK)
6098 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6100 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6108 /* Given a pointer to a tree node for some base type, return a pointer to
6109 a DIE that describes the given type.
6111 This routine must only be called for GCC type nodes that correspond to
6112 Dwarf base (fundamental) types. */
6115 base_type_die (type)
6118 register dw_die_ref base_type_result;
6119 register char *type_name;
6120 register enum dwarf_type encoding;
6121 register tree name = TYPE_NAME (type);
6123 if (TREE_CODE (type) == ERROR_MARK
6124 || TREE_CODE (type) == VOID_TYPE)
6127 if (TREE_CODE (name) == TYPE_DECL)
6128 name = DECL_NAME (name);
6129 type_name = IDENTIFIER_POINTER (name);
6131 switch (TREE_CODE (type))
6134 /* Carefully distinguish the C character types, without messing
6135 up if the language is not C. Note that we check only for the names
6136 that contain spaces; other names might occur by coincidence in other
6138 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6139 && (type == char_type_node
6140 || ! strcmp (type_name, "signed char")
6141 || ! strcmp (type_name, "unsigned char"))))
6143 if (TREE_UNSIGNED (type))
6144 encoding = DW_ATE_unsigned;
6146 encoding = DW_ATE_signed;
6149 /* else fall through */
6152 /* GNU Pascal/Ada CHAR type. Not used in C. */
6153 if (TREE_UNSIGNED (type))
6154 encoding = DW_ATE_unsigned_char;
6156 encoding = DW_ATE_signed_char;
6160 encoding = DW_ATE_float;
6164 encoding = DW_ATE_complex_float;
6168 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6169 encoding = DW_ATE_boolean;
6173 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6176 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6177 add_AT_string (base_type_result, DW_AT_name, type_name);
6178 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6179 TYPE_PRECISION (type) / BITS_PER_UNIT);
6180 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6182 return base_type_result;
6185 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6186 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6187 a given type is generally the same as the given type, except that if the
6188 given type is a pointer or reference type, then the root type of the given
6189 type is the root type of the "basis" type for the pointer or reference
6190 type. (This definition of the "root" type is recursive.) Also, the root
6191 type of a `const' qualified type or a `volatile' qualified type is the
6192 root type of the given type without the qualifiers. */
6198 if (TREE_CODE (type) == ERROR_MARK)
6199 return error_mark_node;
6201 switch (TREE_CODE (type))
6204 return error_mark_node;
6207 case REFERENCE_TYPE:
6208 return type_main_variant (root_type (TREE_TYPE (type)));
6211 return type_main_variant (type);
6215 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6216 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6222 switch (TREE_CODE (type))
6237 case QUAL_UNION_TYPE:
6242 case REFERENCE_TYPE:
6255 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6256 entry that chains various modifiers in front of the given type. */
6259 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6261 register int is_const_type;
6262 register int is_volatile_type;
6263 register dw_die_ref context_die;
6265 register enum tree_code code = TREE_CODE (type);
6266 register dw_die_ref mod_type_die = NULL;
6267 register dw_die_ref sub_die = NULL;
6268 register tree item_type = NULL;
6270 if (code != ERROR_MARK)
6272 type = build_type_variant (type, is_const_type, is_volatile_type);
6274 mod_type_die = lookup_type_die (type);
6276 return mod_type_die;
6278 /* Handle C typedef types. */
6279 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6280 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6282 tree dtype = TREE_TYPE (TYPE_NAME (type));
6285 /* For a named type, use the typedef. */
6286 gen_type_die (type, context_die);
6287 mod_type_die = lookup_type_die (type);
6290 else if (is_const_type < TYPE_READONLY (dtype)
6291 || is_volatile_type < TYPE_VOLATILE (dtype))
6292 /* cv-unqualified version of named type. Just use the unnamed
6293 type to which it refers. */
6295 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6296 is_const_type, is_volatile_type,
6298 /* Else cv-qualified version of named type; fall through. */
6303 else if (is_const_type)
6305 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6306 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6308 else if (is_volatile_type)
6310 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6311 sub_die = modified_type_die (type, 0, 0, context_die);
6313 else if (code == POINTER_TYPE)
6315 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6316 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6318 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6320 item_type = TREE_TYPE (type);
6322 else if (code == REFERENCE_TYPE)
6324 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6325 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6327 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6329 item_type = TREE_TYPE (type);
6331 else if (is_base_type (type))
6332 mod_type_die = base_type_die (type);
6335 gen_type_die (type, context_die);
6337 /* We have to get the type_main_variant here (and pass that to the
6338 `lookup_type_die' routine) because the ..._TYPE node we have
6339 might simply be a *copy* of some original type node (where the
6340 copy was created to help us keep track of typedef names) and
6341 that copy might have a different TYPE_UID from the original
6343 mod_type_die = lookup_type_die (type_main_variant (type));
6344 if (mod_type_die == NULL)
6349 equate_type_number_to_die (type, mod_type_die);
6351 /* We must do this after the equate_type_number_to_die call, in case
6352 this is a recursive type. This ensures that the modified_type_die
6353 recursion will terminate even if the type is recursive. Recursive
6354 types are possible in Ada. */
6355 sub_die = modified_type_die (item_type,
6356 TYPE_READONLY (item_type),
6357 TYPE_VOLATILE (item_type),
6360 if (sub_die != NULL)
6361 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6363 return mod_type_die;
6366 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6367 an enumerated type. */
6373 return TREE_CODE (type) == ENUMERAL_TYPE;
6376 /* Return a location descriptor that designates a machine register. */
6378 static dw_loc_descr_ref
6379 reg_loc_descriptor (rtl)
6382 register dw_loc_descr_ref loc_result = NULL;
6383 register unsigned reg = reg_number (rtl);
6386 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6388 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6393 /* Return a location descriptor that designates a base+offset location. */
6395 static dw_loc_descr_ref
6396 based_loc_descr (reg, offset)
6400 register dw_loc_descr_ref loc_result;
6401 /* For the "frame base", we use the frame pointer or stack pointer
6402 registers, since the RTL for local variables is relative to one of
6404 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6405 ? HARD_FRAME_POINTER_REGNUM
6406 : STACK_POINTER_REGNUM);
6409 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6411 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6413 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6418 /* Return true if this RTL expression describes a base+offset calculation. */
6424 return (GET_CODE (rtl) == PLUS
6425 && ((GET_CODE (XEXP (rtl, 0)) == REG
6426 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6429 /* The following routine converts the RTL for a variable or parameter
6430 (resident in memory) into an equivalent Dwarf representation of a
6431 mechanism for getting the address of that same variable onto the top of a
6432 hypothetical "address evaluation" stack.
6434 When creating memory location descriptors, we are effectively transforming
6435 the RTL for a memory-resident object into its Dwarf postfix expression
6436 equivalent. This routine recursively descends an RTL tree, turning
6437 it into Dwarf postfix code as it goes. */
6439 static dw_loc_descr_ref
6440 mem_loc_descriptor (rtl)
6443 dw_loc_descr_ref mem_loc_result = NULL;
6444 /* Note that for a dynamically sized array, the location we will generate a
6445 description of here will be the lowest numbered location which is
6446 actually within the array. That's *not* necessarily the same as the
6447 zeroth element of the array. */
6449 switch (GET_CODE (rtl))
6452 /* The case of a subreg may arise when we have a local (register)
6453 variable or a formal (register) parameter which doesn't quite fill
6454 up an entire register. For now, just assume that it is
6455 legitimate to make the Dwarf info refer to the whole register which
6456 contains the given subreg. */
6457 rtl = XEXP (rtl, 0);
6459 /* ... fall through ... */
6462 /* Whenever a register number forms a part of the description of the
6463 method for calculating the (dynamic) address of a memory resident
6464 object, DWARF rules require the register number be referred to as
6465 a "base register". This distinction is not based in any way upon
6466 what category of register the hardware believes the given register
6467 belongs to. This is strictly DWARF terminology we're dealing with
6468 here. Note that in cases where the location of a memory-resident
6469 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6470 OP_CONST (0)) the actual DWARF location descriptor that we generate
6471 may just be OP_BASEREG (basereg). This may look deceptively like
6472 the object in question was allocated to a register (rather than in
6473 memory) so DWARF consumers need to be aware of the subtle
6474 distinction between OP_REG and OP_BASEREG. */
6475 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6479 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6480 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6485 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6486 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6487 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6491 if (is_based_loc (rtl))
6492 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6493 INTVAL (XEXP (rtl, 1)));
6496 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6497 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6498 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6503 /* If a pseudo-reg is optimized away, it is possible for it to
6504 be replaced with a MEM containing a multiply. */
6505 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6506 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6507 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6511 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6518 return mem_loc_result;
6521 /* Return a descriptor that describes the concatenation of two locations.
6522 This is typically a complex variable. */
6524 static dw_loc_descr_ref
6525 concat_loc_descriptor (x0, x1)
6526 register rtx x0, x1;
6528 dw_loc_descr_ref cc_loc_result = NULL;
6530 if (!is_pseudo_reg (x0)
6531 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6532 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6533 add_loc_descr (&cc_loc_result,
6534 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6536 if (!is_pseudo_reg (x1)
6537 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6538 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6539 add_loc_descr (&cc_loc_result,
6540 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6542 return cc_loc_result;
6545 /* Output a proper Dwarf location descriptor for a variable or parameter
6546 which is either allocated in a register or in a memory location. For a
6547 register, we just generate an OP_REG and the register number. For a
6548 memory location we provide a Dwarf postfix expression describing how to
6549 generate the (dynamic) address of the object onto the address stack. */
6551 static dw_loc_descr_ref
6552 loc_descriptor (rtl)
6555 dw_loc_descr_ref loc_result = NULL;
6556 switch (GET_CODE (rtl))
6559 /* The case of a subreg may arise when we have a local (register)
6560 variable or a formal (register) parameter which doesn't quite fill
6561 up an entire register. For now, just assume that it is
6562 legitimate to make the Dwarf info refer to the whole register which
6563 contains the given subreg. */
6564 rtl = XEXP (rtl, 0);
6566 /* ... fall through ... */
6569 loc_result = reg_loc_descriptor (rtl);
6573 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6577 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6587 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6588 which is not less than the value itself. */
6590 static inline unsigned
6591 ceiling (value, boundary)
6592 register unsigned value;
6593 register unsigned boundary;
6595 return (((value + boundary - 1) / boundary) * boundary);
6598 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6599 pointer to the declared type for the relevant field variable, or return
6600 `integer_type_node' if the given node turns out to be an
6609 if (TREE_CODE (decl) == ERROR_MARK)
6610 return integer_type_node;
6612 type = DECL_BIT_FIELD_TYPE (decl);
6613 if (type == NULL_TREE)
6614 type = TREE_TYPE (decl);
6619 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6620 node, return the alignment in bits for the type, or else return
6621 BITS_PER_WORD if the node actually turns out to be an
6624 static inline unsigned
6625 simple_type_align_in_bits (type)
6628 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6631 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6632 node, return the size in bits for the type if it is a constant, or else
6633 return the alignment for the type if the type's size is not constant, or
6634 else return BITS_PER_WORD if the type actually turns out to be an
6637 static inline unsigned
6638 simple_type_size_in_bits (type)
6641 if (TREE_CODE (type) == ERROR_MARK)
6642 return BITS_PER_WORD;
6645 register tree type_size_tree = TYPE_SIZE (type);
6647 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6648 return TYPE_ALIGN (type);
6650 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6654 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6655 return the byte offset of the lowest addressed byte of the "containing
6656 object" for the given FIELD_DECL, or return 0 if we are unable to
6657 determine what that offset is, either because the argument turns out to
6658 be a pointer to an ERROR_MARK node, or because the offset is actually
6659 variable. (We can't handle the latter case just yet). */
6662 field_byte_offset (decl)
6665 register unsigned type_align_in_bytes;
6666 register unsigned type_align_in_bits;
6667 register unsigned type_size_in_bits;
6668 register unsigned object_offset_in_align_units;
6669 register unsigned object_offset_in_bits;
6670 register unsigned object_offset_in_bytes;
6672 register tree bitpos_tree;
6673 register tree field_size_tree;
6674 register unsigned bitpos_int;
6675 register unsigned deepest_bitpos;
6676 register unsigned field_size_in_bits;
6678 if (TREE_CODE (decl) == ERROR_MARK)
6681 if (TREE_CODE (decl) != FIELD_DECL)
6684 type = field_type (decl);
6686 bitpos_tree = DECL_FIELD_BITPOS (decl);
6687 field_size_tree = DECL_SIZE (decl);
6689 /* We cannot yet cope with fields whose positions or sizes are variable, so
6690 for now, when we see such things, we simply return 0. Someday, we may
6691 be able to handle such cases, but it will be damn difficult. */
6692 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6694 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6696 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6699 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6700 type_size_in_bits = simple_type_size_in_bits (type);
6701 type_align_in_bits = simple_type_align_in_bits (type);
6702 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6704 /* Note that the GCC front-end doesn't make any attempt to keep track of
6705 the starting bit offset (relative to the start of the containing
6706 structure type) of the hypothetical "containing object" for a bit-
6707 field. Thus, when computing the byte offset value for the start of the
6708 "containing object" of a bit-field, we must deduce this information on
6709 our own. This can be rather tricky to do in some cases. For example,
6710 handling the following structure type definition when compiling for an
6711 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6714 struct S { int field1; long long field2:31; };
6716 Fortunately, there is a simple rule-of-thumb which can be
6717 used in such cases. When compiling for an i386/i486, GCC will allocate
6718 8 bytes for the structure shown above. It decides to do this based upon
6719 one simple rule for bit-field allocation. Quite simply, GCC allocates
6720 each "containing object" for each bit-field at the first (i.e. lowest
6721 addressed) legitimate alignment boundary (based upon the required
6722 minimum alignment for the declared type of the field) which it can
6723 possibly use, subject to the condition that there is still enough
6724 available space remaining in the containing object (when allocated at
6725 the selected point) to fully accommodate all of the bits of the
6726 bit-field itself. This simple rule makes it obvious why GCC allocates
6727 8 bytes for each object of the structure type shown above. When looking
6728 for a place to allocate the "containing object" for `field2', the
6729 compiler simply tries to allocate a 64-bit "containing object" at each
6730 successive 32-bit boundary (starting at zero) until it finds a place to
6731 allocate that 64- bit field such that at least 31 contiguous (and
6732 previously unallocated) bits remain within that selected 64 bit field.
6733 (As it turns out, for the example above, the compiler finds that it is
6734 OK to allocate the "containing object" 64-bit field at bit-offset zero
6735 within the structure type.) Here we attempt to work backwards from the
6736 limited set of facts we're given, and we try to deduce from those facts,
6737 where GCC must have believed that the containing object started (within
6738 the structure type). The value we deduce is then used (by the callers of
6739 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6740 for fields (both bit-fields and, in the case of DW_AT_location, regular
6743 /* Figure out the bit-distance from the start of the structure to the
6744 "deepest" bit of the bit-field. */
6745 deepest_bitpos = bitpos_int + field_size_in_bits;
6747 /* This is the tricky part. Use some fancy footwork to deduce where the
6748 lowest addressed bit of the containing object must be. */
6749 object_offset_in_bits
6750 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6752 /* Compute the offset of the containing object in "alignment units". */
6753 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6755 /* Compute the offset of the containing object in bytes. */
6756 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6758 return object_offset_in_bytes;
6761 /* The following routines define various Dwarf attributes and any data
6762 associated with them. */
6764 /* Add a location description attribute value to a DIE.
6766 This emits location attributes suitable for whole variables and
6767 whole parameters. Note that the location attributes for struct fields are
6768 generated by the routine `data_member_location_attribute' below. */
6771 add_AT_location_description (die, attr_kind, rtl)
6773 enum dwarf_attribute attr_kind;
6776 /* Handle a special case. If we are about to output a location descriptor
6777 for a variable or parameter which has been optimized out of existence,
6778 don't do that. A variable which has been optimized out
6779 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6780 Currently, in some rare cases, variables can have DECL_RTL values which
6781 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6782 elsewhere in the compiler. We treat such cases as if the variable(s) in
6783 question had been optimized out of existence. */
6785 if (is_pseudo_reg (rtl)
6786 || (GET_CODE (rtl) == MEM
6787 && is_pseudo_reg (XEXP (rtl, 0)))
6788 || (GET_CODE (rtl) == CONCAT
6789 && is_pseudo_reg (XEXP (rtl, 0))
6790 && is_pseudo_reg (XEXP (rtl, 1))))
6793 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6796 /* Attach the specialized form of location attribute used for data
6797 members of struct and union types. In the special case of a
6798 FIELD_DECL node which represents a bit-field, the "offset" part
6799 of this special location descriptor must indicate the distance
6800 in bytes from the lowest-addressed byte of the containing struct
6801 or union type to the lowest-addressed byte of the "containing
6802 object" for the bit-field. (See the `field_byte_offset' function
6803 above).. For any given bit-field, the "containing object" is a
6804 hypothetical object (of some integral or enum type) within which
6805 the given bit-field lives. The type of this hypothetical
6806 "containing object" is always the same as the declared type of
6807 the individual bit-field itself (for GCC anyway... the DWARF
6808 spec doesn't actually mandate this). Note that it is the size
6809 (in bytes) of the hypothetical "containing object" which will
6810 be given in the DW_AT_byte_size attribute for this bit-field.
6811 (See the `byte_size_attribute' function below.) It is also used
6812 when calculating the value of the DW_AT_bit_offset attribute.
6813 (See the `bit_offset_attribute' function below). */
6816 add_data_member_location_attribute (die, decl)
6817 register dw_die_ref die;
6820 register unsigned long offset;
6821 register dw_loc_descr_ref loc_descr;
6822 register enum dwarf_location_atom op;
6824 if (TREE_CODE (decl) == TREE_VEC)
6825 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6827 offset = field_byte_offset (decl);
6829 /* The DWARF2 standard says that we should assume that the structure address
6830 is already on the stack, so we can specify a structure field address
6831 by using DW_OP_plus_uconst. */
6833 #ifdef MIPS_DEBUGGING_INFO
6834 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6835 correctly. It works only if we leave the offset on the stack. */
6838 op = DW_OP_plus_uconst;
6841 loc_descr = new_loc_descr (op, offset, 0);
6842 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
6845 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6846 does not have a "location" either in memory or in a register. These
6847 things can arise in GNU C when a constant is passed as an actual parameter
6848 to an inlined function. They can also arise in C++ where declared
6849 constants do not necessarily get memory "homes". */
6852 add_const_value_attribute (die, rtl)
6853 register dw_die_ref die;
6856 switch (GET_CODE (rtl))
6859 /* Note that a CONST_INT rtx could represent either an integer or a
6860 floating-point constant. A CONST_INT is used whenever the constant
6861 will fit into a single word. In all such cases, the original mode
6862 of the constant value is wiped out, and the CONST_INT rtx is
6863 assigned VOIDmode. */
6864 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
6868 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6869 floating-point constant. A CONST_DOUBLE is used whenever the
6870 constant requires more than one word in order to be adequately
6871 represented. We output CONST_DOUBLEs as blocks. */
6873 register enum machine_mode mode = GET_MODE (rtl);
6875 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
6877 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
6881 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
6885 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
6889 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
6894 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
6901 add_AT_float (die, DW_AT_const_value, length, array);
6904 add_AT_long_long (die, DW_AT_const_value,
6905 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
6910 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
6916 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
6920 /* In cases where an inlined instance of an inline function is passed
6921 the address of an `auto' variable (which is local to the caller) we
6922 can get a situation where the DECL_RTL of the artificial local
6923 variable (for the inlining) which acts as a stand-in for the
6924 corresponding formal parameter (of the inline function) will look
6925 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6926 exactly a compile-time constant expression, but it isn't the address
6927 of the (artificial) local variable either. Rather, it represents the
6928 *value* which the artificial local variable always has during its
6929 lifetime. We currently have no way to represent such quasi-constant
6930 values in Dwarf, so for now we just punt and generate nothing. */
6934 /* No other kinds of rtx should be possible here. */
6940 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6941 data attribute for a variable or a parameter. We generate the
6942 DW_AT_const_value attribute only in those cases where the given variable
6943 or parameter does not have a true "location" either in memory or in a
6944 register. This can happen (for example) when a constant is passed as an
6945 actual argument in a call to an inline function. (It's possible that
6946 these things can crop up in other ways also.) Note that one type of
6947 constant value which can be passed into an inlined function is a constant
6948 pointer. This can happen for example if an actual argument in an inlined
6949 function call evaluates to a compile-time constant address. */
6952 add_location_or_const_value_attribute (die, decl)
6953 register dw_die_ref die;
6957 register tree declared_type;
6958 register tree passed_type;
6960 if (TREE_CODE (decl) == ERROR_MARK)
6963 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
6966 /* Here we have to decide where we are going to say the parameter "lives"
6967 (as far as the debugger is concerned). We only have a couple of
6968 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6970 DECL_RTL normally indicates where the parameter lives during most of the
6971 activation of the function. If optimization is enabled however, this
6972 could be either NULL or else a pseudo-reg. Both of those cases indicate
6973 that the parameter doesn't really live anywhere (as far as the code
6974 generation parts of GCC are concerned) during most of the function's
6975 activation. That will happen (for example) if the parameter is never
6976 referenced within the function.
6978 We could just generate a location descriptor here for all non-NULL
6979 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6980 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6981 where DECL_RTL is NULL or is a pseudo-reg.
6983 Note however that we can only get away with using DECL_INCOMING_RTL as
6984 a backup substitute for DECL_RTL in certain limited cases. In cases
6985 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
6986 we can be sure that the parameter was passed using the same type as it is
6987 declared to have within the function, and that its DECL_INCOMING_RTL
6988 points us to a place where a value of that type is passed.
6990 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
6991 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
6992 because in these cases DECL_INCOMING_RTL points us to a value of some
6993 type which is *different* from the type of the parameter itself. Thus,
6994 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
6995 such cases, the debugger would end up (for example) trying to fetch a
6996 `float' from a place which actually contains the first part of a
6997 `double'. That would lead to really incorrect and confusing
6998 output at debug-time.
7000 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7001 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7002 are a couple of exceptions however. On little-endian machines we can
7003 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7004 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7005 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7006 when (on a little-endian machine) a non-prototyped function has a
7007 parameter declared to be of type `short' or `char'. In such cases,
7008 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7009 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7010 passed `int' value. If the debugger then uses that address to fetch
7011 a `short' or a `char' (on a little-endian machine) the result will be
7012 the correct data, so we allow for such exceptional cases below.
7014 Note that our goal here is to describe the place where the given formal
7015 parameter lives during most of the function's activation (i.e. between
7016 the end of the prologue and the start of the epilogue). We'll do that
7017 as best as we can. Note however that if the given formal parameter is
7018 modified sometime during the execution of the function, then a stack
7019 backtrace (at debug-time) will show the function as having been
7020 called with the *new* value rather than the value which was
7021 originally passed in. This happens rarely enough that it is not
7022 a major problem, but it *is* a problem, and I'd like to fix it.
7024 A future version of dwarf2out.c may generate two additional
7025 attributes for any given DW_TAG_formal_parameter DIE which will
7026 describe the "passed type" and the "passed location" for the
7027 given formal parameter in addition to the attributes we now
7028 generate to indicate the "declared type" and the "active
7029 location" for each parameter. This additional set of attributes
7030 could be used by debuggers for stack backtraces. Separately, note
7031 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7032 NULL also. This happens (for example) for inlined-instances of
7033 inline function formal parameters which are never referenced.
7034 This really shouldn't be happening. All PARM_DECL nodes should
7035 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7036 doesn't currently generate these values for inlined instances of
7037 inline function parameters, so when we see such cases, we are
7038 just out-of-luck for the time being (until integrate.c
7041 /* Use DECL_RTL as the "location" unless we find something better. */
7042 rtl = DECL_RTL (decl);
7044 if (TREE_CODE (decl) == PARM_DECL)
7046 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7048 declared_type = type_main_variant (TREE_TYPE (decl));
7049 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7051 /* This decl represents a formal parameter which was optimized out.
7052 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7053 all* cases where (rtl == NULL_RTX) just below. */
7054 if (declared_type == passed_type)
7055 rtl = DECL_INCOMING_RTL (decl);
7056 else if (! BYTES_BIG_ENDIAN
7057 && TREE_CODE (declared_type) == INTEGER_TYPE
7058 && TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
7059 rtl = DECL_INCOMING_RTL (decl);
7063 if (rtl == NULL_RTX)
7066 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7067 #ifdef LEAF_REG_REMAP
7069 leaf_renumber_regs_insn (rtl);
7072 switch (GET_CODE (rtl))
7075 /* The address of a variable that was optimized away; don't emit
7086 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7087 add_const_value_attribute (die, rtl);
7094 add_AT_location_description (die, DW_AT_location, rtl);
7102 /* Generate an DW_AT_name attribute given some string value to be included as
7103 the value of the attribute. */
7106 add_name_attribute (die, name_string)
7107 register dw_die_ref die;
7108 register char *name_string;
7110 if (name_string != NULL && *name_string != 0)
7111 add_AT_string (die, DW_AT_name, name_string);
7114 /* Given a tree node describing an array bound (either lower or upper) output
7115 a representation for that bound. */
7118 add_bound_info (subrange_die, bound_attr, bound)
7119 register dw_die_ref subrange_die;
7120 register enum dwarf_attribute bound_attr;
7121 register tree bound;
7123 register unsigned bound_value = 0;
7125 /* If this is an Ada unconstrained array type, then don't emit any debug
7126 info because the array bounds are unknown. They are parameterized when
7127 the type is instantiated. */
7128 if (contains_placeholder_p (bound))
7131 switch (TREE_CODE (bound))
7136 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7138 bound_value = TREE_INT_CST_LOW (bound);
7139 if (bound_attr == DW_AT_lower_bound
7140 && ((is_c_family () && bound_value == 0)
7141 || (is_fortran () && bound_value == 1)))
7142 /* use the default */;
7144 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7149 case NON_LVALUE_EXPR:
7150 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7154 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7155 access the upper bound values may be bogus. If they refer to a
7156 register, they may only describe how to get at these values at the
7157 points in the generated code right after they have just been
7158 computed. Worse yet, in the typical case, the upper bound values
7159 will not even *be* computed in the optimized code (though the
7160 number of elements will), so these SAVE_EXPRs are entirely
7161 bogus. In order to compensate for this fact, we check here to see
7162 if optimization is enabled, and if so, we don't add an attribute
7163 for the (unknown and unknowable) upper bound. This should not
7164 cause too much trouble for existing (stupid?) debuggers because
7165 they have to deal with empty upper bounds location descriptions
7166 anyway in order to be able to deal with incomplete array types.
7167 Of course an intelligent debugger (GDB?) should be able to
7168 comprehend that a missing upper bound specification in a array
7169 type used for a storage class `auto' local array variable
7170 indicates that the upper bound is both unknown (at compile- time)
7171 and unknowable (at run-time) due to optimization.
7173 We assume that a MEM rtx is safe because gcc wouldn't put the
7174 value there unless it was going to be used repeatedly in the
7175 function, i.e. for cleanups. */
7176 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7178 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7179 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7180 register rtx loc = SAVE_EXPR_RTL (bound);
7182 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7183 it references an outer function's frame. */
7185 if (GET_CODE (loc) == MEM)
7187 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7189 if (XEXP (loc, 0) != new_addr)
7190 loc = gen_rtx (MEM, GET_MODE (loc), new_addr);
7193 add_AT_flag (decl_die, DW_AT_artificial, 1);
7194 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7195 add_AT_location_description (decl_die, DW_AT_location, loc);
7196 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7199 /* Else leave out the attribute. */
7205 /* ??? These types of bounds can be created by the Ada front end,
7206 and it isn't clear how to emit debug info for them. */
7214 /* Note that the block of subscript information for an array type also
7215 includes information about the element type of type given array type. */
7218 add_subscript_info (type_die, type)
7219 register dw_die_ref type_die;
7222 #ifndef MIPS_DEBUGGING_INFO
7223 register unsigned dimension_number;
7225 register tree lower, upper;
7226 register dw_die_ref subrange_die;
7228 /* The GNU compilers represent multidimensional array types as sequences of
7229 one dimensional array types whose element types are themselves array
7230 types. Here we squish that down, so that each multidimensional array
7231 type gets only one array_type DIE in the Dwarf debugging info. The draft
7232 Dwarf specification say that we are allowed to do this kind of
7233 compression in C (because there is no difference between an array or
7234 arrays and a multidimensional array in C) but for other source languages
7235 (e.g. Ada) we probably shouldn't do this. */
7237 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7238 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7239 We work around this by disabling this feature. See also
7240 gen_array_type_die. */
7241 #ifndef MIPS_DEBUGGING_INFO
7242 for (dimension_number = 0;
7243 TREE_CODE (type) == ARRAY_TYPE;
7244 type = TREE_TYPE (type), dimension_number++)
7247 register tree domain = TYPE_DOMAIN (type);
7249 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7250 and (in GNU C only) variable bounds. Handle all three forms
7252 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7255 /* We have an array type with specified bounds. */
7256 lower = TYPE_MIN_VALUE (domain);
7257 upper = TYPE_MAX_VALUE (domain);
7259 /* define the index type. */
7260 if (TREE_TYPE (domain))
7262 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7263 TREE_TYPE field. We can't emit debug info for this
7264 because it is an unnamed integral type. */
7265 if (TREE_CODE (domain) == INTEGER_TYPE
7266 && TYPE_NAME (domain) == NULL_TREE
7267 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7268 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7271 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7275 /* ??? If upper is NULL, the array has unspecified length,
7276 but it does have a lower bound. This happens with Fortran
7278 Since the debugger is definitely going to need to know N
7279 to produce useful results, go ahead and output the lower
7280 bound solo, and hope the debugger can cope. */
7282 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7284 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7287 /* We have an array type with an unspecified length. The DWARF-2
7288 spec does not say how to handle this; let's just leave out the
7293 #ifndef MIPS_DEBUGGING_INFO
7299 add_byte_size_attribute (die, tree_node)
7301 register tree tree_node;
7303 register unsigned size;
7305 switch (TREE_CODE (tree_node))
7313 case QUAL_UNION_TYPE:
7314 size = int_size_in_bytes (tree_node);
7317 /* For a data member of a struct or union, the DW_AT_byte_size is
7318 generally given as the number of bytes normally allocated for an
7319 object of the *declared* type of the member itself. This is true
7320 even for bit-fields. */
7321 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7327 /* Note that `size' might be -1 when we get to this point. If it is, that
7328 indicates that the byte size of the entity in question is variable. We
7329 have no good way of expressing this fact in Dwarf at the present time,
7330 so just let the -1 pass on through. */
7332 add_AT_unsigned (die, DW_AT_byte_size, size);
7335 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7336 which specifies the distance in bits from the highest order bit of the
7337 "containing object" for the bit-field to the highest order bit of the
7340 For any given bit-field, the "containing object" is a hypothetical
7341 object (of some integral or enum type) within which the given bit-field
7342 lives. The type of this hypothetical "containing object" is always the
7343 same as the declared type of the individual bit-field itself. The
7344 determination of the exact location of the "containing object" for a
7345 bit-field is rather complicated. It's handled by the
7346 `field_byte_offset' function (above).
7348 Note that it is the size (in bytes) of the hypothetical "containing object"
7349 which will be given in the DW_AT_byte_size attribute for this bit-field.
7350 (See `byte_size_attribute' above). */
7353 add_bit_offset_attribute (die, decl)
7354 register dw_die_ref die;
7357 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7358 register tree type = DECL_BIT_FIELD_TYPE (decl);
7359 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7360 register unsigned bitpos_int;
7361 register unsigned highest_order_object_bit_offset;
7362 register unsigned highest_order_field_bit_offset;
7363 register unsigned bit_offset;
7365 /* Must be a field and a bit field. */
7367 || TREE_CODE (decl) != FIELD_DECL)
7370 /* We can't yet handle bit-fields whose offsets are variable, so if we
7371 encounter such things, just return without generating any attribute
7373 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7376 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7378 /* Note that the bit offset is always the distance (in bits) from the
7379 highest-order bit of the "containing object" to the highest-order bit of
7380 the bit-field itself. Since the "high-order end" of any object or field
7381 is different on big-endian and little-endian machines, the computation
7382 below must take account of these differences. */
7383 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7384 highest_order_field_bit_offset = bitpos_int;
7386 if (! BYTES_BIG_ENDIAN)
7388 highest_order_field_bit_offset
7389 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7391 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7395 = (! BYTES_BIG_ENDIAN
7396 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7397 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7399 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7402 /* For a FIELD_DECL node which represents a bit field, output an attribute
7403 which specifies the length in bits of the given field. */
7406 add_bit_size_attribute (die, decl)
7407 register dw_die_ref die;
7410 /* Must be a field and a bit field. */
7411 if (TREE_CODE (decl) != FIELD_DECL
7412 || ! DECL_BIT_FIELD_TYPE (decl))
7414 add_AT_unsigned (die, DW_AT_bit_size,
7415 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7418 /* If the compiled language is ANSI C, then add a 'prototyped'
7419 attribute, if arg types are given for the parameters of a function. */
7422 add_prototyped_attribute (die, func_type)
7423 register dw_die_ref die;
7424 register tree func_type;
7426 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7427 && TYPE_ARG_TYPES (func_type) != NULL)
7428 add_AT_flag (die, DW_AT_prototyped, 1);
7432 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7433 by looking in either the type declaration or object declaration
7437 add_abstract_origin_attribute (die, origin)
7438 register dw_die_ref die;
7439 register tree origin;
7441 dw_die_ref origin_die = NULL;
7442 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7443 origin_die = lookup_decl_die (origin);
7444 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7445 origin_die = lookup_type_die (origin);
7447 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7450 /* We do not currently support the pure_virtual attribute. */
7453 add_pure_or_virtual_attribute (die, func_decl)
7454 register dw_die_ref die;
7455 register tree func_decl;
7457 if (DECL_VINDEX (func_decl))
7459 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7460 add_AT_loc (die, DW_AT_vtable_elem_location,
7461 new_loc_descr (DW_OP_constu,
7462 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7465 /* GNU extension: Record what type this method came from originally. */
7466 if (debug_info_level > DINFO_LEVEL_TERSE)
7467 add_AT_die_ref (die, DW_AT_containing_type,
7468 lookup_type_die (DECL_CONTEXT (func_decl)));
7472 /* Add source coordinate attributes for the given decl. */
7475 add_src_coords_attributes (die, decl)
7476 register dw_die_ref die;
7479 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7481 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7482 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7485 /* Add an DW_AT_name attribute and source coordinate attribute for the
7486 given decl, but only if it actually has a name. */
7489 add_name_and_src_coords_attributes (die, decl)
7490 register dw_die_ref die;
7493 register tree decl_name;
7495 decl_name = DECL_NAME (decl);
7496 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7498 add_name_attribute (die, dwarf2_name (decl, 0));
7499 add_src_coords_attributes (die, decl);
7500 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7501 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7502 add_AT_string (die, DW_AT_MIPS_linkage_name,
7503 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7507 /* Push a new declaration scope. */
7510 push_decl_scope (scope)
7513 tree containing_scope;
7516 /* Make room in the decl_scope_table, if necessary. */
7517 if (decl_scope_table_allocated == decl_scope_depth)
7519 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7521 = (decl_scope_node *) xrealloc (decl_scope_table,
7522 (decl_scope_table_allocated
7523 * sizeof (decl_scope_node)));
7526 decl_scope_table[decl_scope_depth].scope = scope;
7528 /* Sometimes, while recursively emitting subtypes within a class type,
7529 we end up recuring on a subtype at a higher level then the current
7530 subtype. In such a case, we need to search the decl_scope_table to
7531 find the parent of this subtype. */
7533 if (TREE_CODE_CLASS (TREE_CODE (scope)) == 't')
7534 containing_scope = TYPE_CONTEXT (scope);
7536 containing_scope = NULL_TREE;
7538 /* The normal case. */
7539 if (decl_scope_depth == 0
7540 || containing_scope == NULL_TREE
7541 /* Ignore namespaces for the moment. */
7542 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7543 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7544 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7547 /* We need to search for the containing_scope. */
7548 for (i = 0; i < decl_scope_depth; i++)
7549 if (decl_scope_table[i].scope == containing_scope)
7552 if (i == decl_scope_depth)
7555 decl_scope_table[decl_scope_depth].previous = i;
7561 /* Return the DIE for the scope that immediately contains this declaration. */
7564 scope_die_for (t, context_die)
7566 register dw_die_ref context_die;
7568 register dw_die_ref scope_die = NULL;
7569 register tree containing_scope;
7572 /* Walk back up the declaration tree looking for a place to define
7574 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7575 containing_scope = TYPE_CONTEXT (t);
7576 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7577 containing_scope = decl_class_context (t);
7579 containing_scope = DECL_CONTEXT (t);
7581 /* Ignore namespaces for the moment. */
7582 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7583 containing_scope = NULL_TREE;
7585 /* Function-local tags and functions get stuck in limbo until they are
7586 fixed up by decls_for_scope. */
7587 if (context_die == NULL && containing_scope != NULL_TREE
7588 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7591 if (containing_scope == NULL_TREE)
7592 scope_die = comp_unit_die;
7595 for (i = decl_scope_depth - 1, scope_die = context_die;
7596 i >= 0 && decl_scope_table[i].scope != containing_scope;
7597 (scope_die = scope_die->die_parent,
7598 i = decl_scope_table[i].previous))
7601 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7602 does it try to handle types defined by TYPE_DECLs. Such types
7603 thus have an incorrect TYPE_CONTEXT, which points to the block
7604 they were originally defined in, instead of the current block
7605 created by function inlining. We try to detect that here and
7608 if (i < 0 && scope_die == comp_unit_die
7609 && TREE_CODE (containing_scope) == BLOCK
7610 && is_tagged_type (t)
7611 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7612 == containing_scope))
7614 scope_die = context_die;
7615 /* Since the checks below are no longer applicable. */
7621 if (scope_die != comp_unit_die
7622 || TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7624 if (debug_info_level > DINFO_LEVEL_TERSE
7625 && !TREE_ASM_WRITTEN (containing_scope))
7633 /* Pop a declaration scope. */
7637 if (decl_scope_depth <= 0)
7642 /* Many forms of DIEs require a "type description" attribute. This
7643 routine locates the proper "type descriptor" die for the type given
7644 by 'type', and adds an DW_AT_type attribute below the given die. */
7647 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7648 register dw_die_ref object_die;
7650 register int decl_const;
7651 register int decl_volatile;
7652 register dw_die_ref context_die;
7654 register enum tree_code code = TREE_CODE (type);
7655 register dw_die_ref type_die = NULL;
7657 /* ??? If this type is an unnamed subrange type of an integral or
7658 floating-point type, use the inner type. This is because we have no
7659 support for unnamed types in base_type_die. This can happen if this is
7660 an Ada subrange type. Correct solution is emit a subrange type die. */
7661 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7662 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7663 type = TREE_TYPE (type), code = TREE_CODE (type);
7665 if (code == ERROR_MARK)
7668 /* Handle a special case. For functions whose return type is void, we
7669 generate *no* type attribute. (Note that no object may have type
7670 `void', so this only applies to function return types). */
7671 if (code == VOID_TYPE)
7674 type_die = modified_type_die (type,
7675 decl_const || TYPE_READONLY (type),
7676 decl_volatile || TYPE_VOLATILE (type),
7678 if (type_die != NULL)
7679 add_AT_die_ref (object_die, DW_AT_type, type_die);
7682 /* Given a tree pointer to a struct, class, union, or enum type node, return
7683 a pointer to the (string) tag name for the given type, or zero if the type
7684 was declared without a tag. */
7690 register char *name = 0;
7692 if (TYPE_NAME (type) != 0)
7694 register tree t = 0;
7696 /* Find the IDENTIFIER_NODE for the type name. */
7697 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7698 t = TYPE_NAME (type);
7700 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7701 a TYPE_DECL node, regardless of whether or not a `typedef' was
7703 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7704 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7705 t = DECL_NAME (TYPE_NAME (type));
7707 /* Now get the name as a string, or invent one. */
7709 name = IDENTIFIER_POINTER (t);
7712 return (name == 0 || *name == '\0') ? 0 : name;
7715 /* Return the type associated with a data member, make a special check
7716 for bit field types. */
7719 member_declared_type (member)
7720 register tree member;
7722 return (DECL_BIT_FIELD_TYPE (member)
7723 ? DECL_BIT_FIELD_TYPE (member)
7724 : TREE_TYPE (member));
7727 /* Get the decl's label, as described by its RTL. This may be different
7728 from the DECL_NAME name used in the source file. */
7731 decl_start_label (decl)
7736 x = DECL_RTL (decl);
7737 if (GET_CODE (x) != MEM)
7741 if (GET_CODE (x) != SYMBOL_REF)
7744 fnname = XSTR (x, 0);
7748 /* These routines generate the internal representation of the DIE's for
7749 the compilation unit. Debugging information is collected by walking
7750 the declaration trees passed in from dwarf2out_decl(). */
7753 gen_array_type_die (type, context_die)
7755 register dw_die_ref context_die;
7757 register dw_die_ref scope_die = scope_die_for (type, context_die);
7758 register dw_die_ref array_die;
7759 register tree element_type;
7761 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7762 the inner array type comes before the outer array type. Thus we must
7763 call gen_type_die before we call new_die. See below also. */
7764 #ifdef MIPS_DEBUGGING_INFO
7765 gen_type_die (TREE_TYPE (type), context_die);
7768 array_die = new_die (DW_TAG_array_type, scope_die);
7771 /* We default the array ordering. SDB will probably do
7772 the right things even if DW_AT_ordering is not present. It's not even
7773 an issue until we start to get into multidimensional arrays anyway. If
7774 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7775 then we'll have to put the DW_AT_ordering attribute back in. (But if
7776 and when we find out that we need to put these in, we will only do so
7777 for multidimensional arrays. */
7778 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
7781 #ifdef MIPS_DEBUGGING_INFO
7782 /* The SGI compilers handle arrays of unknown bound by setting
7783 AT_declaration and not emitting any subrange DIEs. */
7784 if (! TYPE_DOMAIN (type))
7785 add_AT_unsigned (array_die, DW_AT_declaration, 1);
7788 add_subscript_info (array_die, type);
7790 equate_type_number_to_die (type, array_die);
7792 /* Add representation of the type of the elements of this array type. */
7793 element_type = TREE_TYPE (type);
7795 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7796 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7797 We work around this by disabling this feature. See also
7798 add_subscript_info. */
7799 #ifndef MIPS_DEBUGGING_INFO
7800 while (TREE_CODE (element_type) == ARRAY_TYPE)
7801 element_type = TREE_TYPE (element_type);
7803 gen_type_die (element_type, context_die);
7806 add_type_attribute (array_die, element_type, 0, 0, context_die);
7810 gen_set_type_die (type, context_die)
7812 register dw_die_ref context_die;
7814 register dw_die_ref type_die
7815 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
7817 equate_type_number_to_die (type, type_die);
7818 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
7823 gen_entry_point_die (decl, context_die)
7825 register dw_die_ref context_die;
7827 register tree origin = decl_ultimate_origin (decl);
7828 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
7830 add_abstract_origin_attribute (decl_die, origin);
7833 add_name_and_src_coords_attributes (decl_die, decl);
7834 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
7838 if (DECL_ABSTRACT (decl))
7839 equate_decl_number_to_die (decl, decl_die);
7841 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
7845 /* Remember a type in the pending_types_list. */
7851 if (pending_types == pending_types_allocated)
7853 pending_types_allocated += PENDING_TYPES_INCREMENT;
7855 = (tree *) xrealloc (pending_types_list,
7856 sizeof (tree) * pending_types_allocated);
7859 pending_types_list[pending_types++] = type;
7862 /* Output any pending types (from the pending_types list) which we can output
7863 now (taking into account the scope that we are working on now).
7865 For each type output, remove the given type from the pending_types_list
7866 *before* we try to output it. */
7869 output_pending_types_for_scope (context_die)
7870 register dw_die_ref context_die;
7874 while (pending_types)
7877 type = pending_types_list[pending_types];
7878 gen_type_die (type, context_die);
7879 if (!TREE_ASM_WRITTEN (type))
7884 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7887 gen_inlined_enumeration_type_die (type, context_die)
7889 register dw_die_ref context_die;
7891 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
7892 scope_die_for (type, context_die));
7894 if (!TREE_ASM_WRITTEN (type))
7896 add_abstract_origin_attribute (type_die, type);
7899 /* Generate a DIE to represent an inlined instance of a structure type. */
7902 gen_inlined_structure_type_die (type, context_die)
7904 register dw_die_ref context_die;
7906 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
7907 scope_die_for (type, context_die));
7909 if (!TREE_ASM_WRITTEN (type))
7911 add_abstract_origin_attribute (type_die, type);
7914 /* Generate a DIE to represent an inlined instance of a union type. */
7917 gen_inlined_union_type_die (type, context_die)
7919 register dw_die_ref context_die;
7921 register dw_die_ref type_die = new_die (DW_TAG_union_type,
7922 scope_die_for (type, context_die));
7924 if (!TREE_ASM_WRITTEN (type))
7926 add_abstract_origin_attribute (type_die, type);
7929 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7930 include all of the information about the enumeration values also. Each
7931 enumerated type name/value is listed as a child of the enumerated type
7935 gen_enumeration_type_die (type, context_die)
7937 register dw_die_ref context_die;
7939 register dw_die_ref type_die = lookup_type_die (type);
7941 if (type_die == NULL)
7943 type_die = new_die (DW_TAG_enumeration_type,
7944 scope_die_for (type, context_die));
7945 equate_type_number_to_die (type, type_die);
7946 add_name_attribute (type_die, type_tag (type));
7948 else if (! TYPE_SIZE (type))
7951 remove_AT (type_die, DW_AT_declaration);
7953 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7954 given enum type is incomplete, do not generate the DW_AT_byte_size
7955 attribute or the DW_AT_element_list attribute. */
7956 if (TYPE_SIZE (type))
7960 TREE_ASM_WRITTEN (type) = 1;
7961 add_byte_size_attribute (type_die, type);
7962 if (TYPE_STUB_DECL (type) != NULL_TREE)
7963 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
7965 /* If the first reference to this type was as the return type of an
7966 inline function, then it may not have a parent. Fix this now. */
7967 if (type_die->die_parent == NULL)
7968 add_child_die (scope_die_for (type, context_die), type_die);
7970 for (link = TYPE_FIELDS (type);
7971 link != NULL; link = TREE_CHAIN (link))
7973 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
7975 add_name_attribute (enum_die,
7976 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
7977 add_AT_unsigned (enum_die, DW_AT_const_value,
7978 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
7982 add_AT_flag (type_die, DW_AT_declaration, 1);
7986 /* Generate a DIE to represent either a real live formal parameter decl or to
7987 represent just the type of some formal parameter position in some function
7990 Note that this routine is a bit unusual because its argument may be a
7991 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
7992 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
7993 node. If it's the former then this function is being called to output a
7994 DIE to represent a formal parameter object (or some inlining thereof). If
7995 it's the latter, then this function is only being called to output a
7996 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
7997 argument type of some subprogram type. */
8000 gen_formal_parameter_die (node, context_die)
8002 register dw_die_ref context_die;
8004 register dw_die_ref parm_die
8005 = new_die (DW_TAG_formal_parameter, context_die);
8006 register tree origin;
8008 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8011 origin = decl_ultimate_origin (node);
8013 add_abstract_origin_attribute (parm_die, origin);
8016 add_name_and_src_coords_attributes (parm_die, node);
8017 add_type_attribute (parm_die, TREE_TYPE (node),
8018 TREE_READONLY (node),
8019 TREE_THIS_VOLATILE (node),
8021 if (DECL_ARTIFICIAL (node))
8022 add_AT_flag (parm_die, DW_AT_artificial, 1);
8025 equate_decl_number_to_die (node, parm_die);
8026 if (! DECL_ABSTRACT (node))
8027 add_location_or_const_value_attribute (parm_die, node);
8032 /* We were called with some kind of a ..._TYPE node. */
8033 add_type_attribute (parm_die, node, 0, 0, context_die);
8043 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8044 at the end of an (ANSI prototyped) formal parameters list. */
8047 gen_unspecified_parameters_die (decl_or_type, context_die)
8048 register tree decl_or_type;
8049 register dw_die_ref context_die;
8051 register dw_die_ref parm_die = new_die (DW_TAG_unspecified_parameters,
8055 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8056 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8057 parameters as specified in some function type specification (except for
8058 those which appear as part of a function *definition*).
8060 Note we must be careful here to output all of the parameter DIEs before*
8061 we output any DIEs needed to represent the types of the formal parameters.
8062 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8063 non-parameter DIE it sees ends the formal parameter list. */
8066 gen_formal_types_die (function_or_method_type, context_die)
8067 register tree function_or_method_type;
8068 register dw_die_ref context_die;
8071 register tree formal_type = NULL;
8072 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8075 /* In the case where we are generating a formal types list for a C++
8076 non-static member function type, skip over the first thing on the
8077 TYPE_ARG_TYPES list because it only represents the type of the hidden
8078 `this pointer'. The debugger should be able to figure out (without
8079 being explicitly told) that this non-static member function type takes a
8080 `this pointer' and should be able to figure what the type of that hidden
8081 parameter is from the DW_AT_member attribute of the parent
8082 DW_TAG_subroutine_type DIE. */
8083 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8084 first_parm_type = TREE_CHAIN (first_parm_type);
8087 /* Make our first pass over the list of formal parameter types and output a
8088 DW_TAG_formal_parameter DIE for each one. */
8089 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8091 register dw_die_ref parm_die;
8093 formal_type = TREE_VALUE (link);
8094 if (formal_type == void_type_node)
8097 /* Output a (nameless) DIE to represent the formal parameter itself. */
8098 parm_die = gen_formal_parameter_die (formal_type, context_die);
8099 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8100 && link == first_parm_type)
8101 add_AT_flag (parm_die, DW_AT_artificial, 1);
8104 /* If this function type has an ellipsis, add a
8105 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8106 if (formal_type != void_type_node)
8107 gen_unspecified_parameters_die (function_or_method_type, context_die);
8109 /* Make our second (and final) pass over the list of formal parameter types
8110 and output DIEs to represent those types (as necessary). */
8111 for (link = TYPE_ARG_TYPES (function_or_method_type);
8113 link = TREE_CHAIN (link))
8115 formal_type = TREE_VALUE (link);
8116 if (formal_type == void_type_node)
8119 gen_type_die (formal_type, context_die);
8123 /* Generate a DIE to represent a declared function (either file-scope or
8127 gen_subprogram_die (decl, context_die)
8129 register dw_die_ref context_die;
8131 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8132 register tree origin = decl_ultimate_origin (decl);
8133 register dw_die_ref subr_die;
8134 register rtx fp_reg;
8135 register tree fn_arg_types;
8136 register tree outer_scope;
8137 register dw_die_ref old_die = lookup_decl_die (decl);
8138 register int declaration
8139 = (current_function_decl != decl
8141 && (context_die->die_tag == DW_TAG_structure_type
8142 || context_die->die_tag == DW_TAG_union_type)));
8146 subr_die = new_die (DW_TAG_subprogram, context_die);
8147 add_abstract_origin_attribute (subr_die, origin);
8149 else if (old_die && DECL_ABSTRACT (decl)
8150 && get_AT_unsigned (old_die, DW_AT_inline))
8152 /* This must be a redefinition of an extern inline function.
8153 We can just reuse the old die here. */
8156 /* Clear out the inlined attribute and parm types. */
8157 remove_AT (subr_die, DW_AT_inline);
8158 remove_children (subr_die);
8162 register unsigned file_index
8163 = lookup_filename (DECL_SOURCE_FILE (decl));
8165 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8168 /* If the definition comes from the same place as the declaration,
8169 maybe use the old DIE. We always want the DIE for this function
8170 that has the *_pc attributes to be under comp_unit_die so the
8171 debugger can find it. For inlines, that is the concrete instance,
8172 so we can use the old DIE here. For non-inline methods, we want a
8173 specification DIE at toplevel, so we need a new DIE. For local
8174 class methods, this does not apply. */
8175 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8176 || context_die == NULL)
8177 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8178 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8179 == DECL_SOURCE_LINE (decl)))
8183 /* Clear out the declaration attribute and the parm types. */
8184 remove_AT (subr_die, DW_AT_declaration);
8185 remove_children (subr_die);
8189 subr_die = new_die (DW_TAG_subprogram, context_die);
8190 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8191 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8192 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8193 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8194 != DECL_SOURCE_LINE (decl))
8196 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8201 register dw_die_ref scope_die;
8203 if (DECL_CONTEXT (decl))
8204 scope_die = scope_die_for (decl, context_die);
8206 /* Don't put block extern declarations under comp_unit_die. */
8207 scope_die = context_die;
8209 subr_die = new_die (DW_TAG_subprogram, scope_die);
8211 if (TREE_PUBLIC (decl))
8212 add_AT_flag (subr_die, DW_AT_external, 1);
8214 add_name_and_src_coords_attributes (subr_die, decl);
8215 if (debug_info_level > DINFO_LEVEL_TERSE)
8217 register tree type = TREE_TYPE (decl);
8219 add_prototyped_attribute (subr_die, type);
8220 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8223 add_pure_or_virtual_attribute (subr_die, decl);
8224 if (DECL_ARTIFICIAL (decl))
8225 add_AT_flag (subr_die, DW_AT_artificial, 1);
8226 if (TREE_PROTECTED (decl))
8227 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8228 else if (TREE_PRIVATE (decl))
8229 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8234 add_AT_flag (subr_die, DW_AT_declaration, 1);
8236 /* The first time we see a member function, it is in the context of
8237 the class to which it belongs. We make sure of this by emitting
8238 the class first. The next time is the definition, which is
8239 handled above. The two may come from the same source text. */
8240 if (DECL_CONTEXT (decl))
8241 equate_decl_number_to_die (decl, subr_die);
8243 else if (DECL_ABSTRACT (decl))
8245 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8246 but not for extern inline functions. We can't get this completely
8247 correct because information about whether the function was declared
8248 inline is not saved anywhere. */
8249 if (DECL_DEFER_OUTPUT (decl))
8251 if (DECL_INLINE (decl))
8252 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8254 add_AT_unsigned (subr_die, DW_AT_inline,
8255 DW_INL_declared_not_inlined);
8257 else if (DECL_INLINE (decl))
8258 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8262 equate_decl_number_to_die (decl, subr_die);
8264 else if (!DECL_EXTERNAL (decl))
8266 if (origin == NULL_TREE)
8267 equate_decl_number_to_die (decl, subr_die);
8269 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8270 current_funcdef_number);
8271 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8272 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8273 current_funcdef_number);
8274 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8276 add_pubname (decl, subr_die);
8277 add_arange (decl, subr_die);
8279 #ifdef MIPS_DEBUGGING_INFO
8280 /* Add a reference to the FDE for this routine. */
8281 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8284 /* Define the "frame base" location for this routine. We use the
8285 frame pointer or stack pointer registers, since the RTL for local
8286 variables is relative to one of them. */
8288 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8289 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8292 /* ??? This fails for nested inline functions, because context_display
8293 is not part of the state saved/restored for inline functions. */
8294 if (current_function_needs_context)
8295 add_AT_location_description (subr_die, DW_AT_static_link,
8296 lookup_static_chain (decl));
8300 /* Now output descriptions of the arguments for this function. This gets
8301 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8302 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8303 `...' at the end of the formal parameter list. In order to find out if
8304 there was a trailing ellipsis or not, we must instead look at the type
8305 associated with the FUNCTION_DECL. This will be a node of type
8306 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8307 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8308 an ellipsis at the end. */
8309 push_decl_scope (decl);
8311 /* In the case where we are describing a mere function declaration, all we
8312 need to do here (and all we *can* do here) is to describe the *types* of
8313 its formal parameters. */
8314 if (debug_info_level <= DINFO_LEVEL_TERSE)
8316 else if (declaration)
8317 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8320 /* Generate DIEs to represent all known formal parameters */
8321 register tree arg_decls = DECL_ARGUMENTS (decl);
8324 /* When generating DIEs, generate the unspecified_parameters DIE
8325 instead if we come across the arg "__builtin_va_alist" */
8326 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8327 if (TREE_CODE (parm) == PARM_DECL)
8329 if (DECL_NAME (parm)
8330 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8331 "__builtin_va_alist"))
8332 gen_unspecified_parameters_die (parm, subr_die);
8334 gen_decl_die (parm, subr_die);
8337 /* Decide whether we need a unspecified_parameters DIE at the end.
8338 There are 2 more cases to do this for: 1) the ansi ... declaration -
8339 this is detectable when the end of the arg list is not a
8340 void_type_node 2) an unprototyped function declaration (not a
8341 definition). This just means that we have no info about the
8342 parameters at all. */
8343 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8344 if (fn_arg_types != NULL)
8346 /* this is the prototyped case, check for ... */
8347 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8348 gen_unspecified_parameters_die (decl, subr_die);
8350 else if (DECL_INITIAL (decl) == NULL_TREE)
8351 gen_unspecified_parameters_die (decl, subr_die);
8354 /* Output Dwarf info for all of the stuff within the body of the function
8355 (if it has one - it may be just a declaration). */
8356 outer_scope = DECL_INITIAL (decl);
8358 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8359 node created to represent a function. This outermost BLOCK actually
8360 represents the outermost binding contour for the function, i.e. the
8361 contour in which the function's formal parameters and labels get
8362 declared. Curiously, it appears that the front end doesn't actually
8363 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8364 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8365 list for the function instead.) The BLOCK_VARS list for the
8366 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8367 the function however, and we output DWARF info for those in
8368 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8369 node representing the function's outermost pair of curly braces, and
8370 any blocks used for the base and member initializers of a C++
8371 constructor function. */
8372 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8374 current_function_has_inlines = 0;
8375 decls_for_scope (outer_scope, subr_die, 0);
8377 #if 0 && defined (MIPS_DEBUGGING_INFO)
8378 if (current_function_has_inlines)
8380 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8381 if (! comp_unit_has_inlines)
8383 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8384 comp_unit_has_inlines = 1;
8393 /* Generate a DIE to represent a declared data object. */
8396 gen_variable_die (decl, context_die)
8398 register dw_die_ref context_die;
8400 register tree origin = decl_ultimate_origin (decl);
8401 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8403 dw_die_ref old_die = lookup_decl_die (decl);
8405 = (DECL_EXTERNAL (decl)
8406 || current_function_decl != decl_function_context (decl)
8407 || context_die->die_tag == DW_TAG_structure_type
8408 || context_die->die_tag == DW_TAG_union_type);
8411 add_abstract_origin_attribute (var_die, origin);
8412 /* Loop unrolling can create multiple blocks that refer to the same
8413 static variable, so we must test for the DW_AT_declaration flag. */
8414 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8415 copy decls and set the DECL_ABSTRACT flag on them instead of
8417 else if (old_die && TREE_STATIC (decl)
8418 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8420 /* ??? This is an instantiation of a C++ class level static. */
8421 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8422 if (DECL_NAME (decl))
8424 register unsigned file_index
8425 = lookup_filename (DECL_SOURCE_FILE (decl));
8427 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8428 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8430 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8431 != DECL_SOURCE_LINE (decl))
8433 add_AT_unsigned (var_die, DW_AT_decl_line,
8434 DECL_SOURCE_LINE (decl));
8439 add_name_and_src_coords_attributes (var_die, decl);
8440 add_type_attribute (var_die, TREE_TYPE (decl),
8441 TREE_READONLY (decl),
8442 TREE_THIS_VOLATILE (decl), context_die);
8444 if (TREE_PUBLIC (decl))
8445 add_AT_flag (var_die, DW_AT_external, 1);
8447 if (DECL_ARTIFICIAL (decl))
8448 add_AT_flag (var_die, DW_AT_artificial, 1);
8450 if (TREE_PROTECTED (decl))
8451 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8453 else if (TREE_PRIVATE (decl))
8454 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8458 add_AT_flag (var_die, DW_AT_declaration, 1);
8460 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8461 equate_decl_number_to_die (decl, var_die);
8463 if (! declaration && ! DECL_ABSTRACT (decl))
8465 equate_decl_number_to_die (decl, var_die);
8466 add_location_or_const_value_attribute (var_die, decl);
8467 add_pubname (decl, var_die);
8471 /* Generate a DIE to represent a label identifier. */
8474 gen_label_die (decl, context_die)
8476 register dw_die_ref context_die;
8478 register tree origin = decl_ultimate_origin (decl);
8479 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8481 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8482 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8485 add_abstract_origin_attribute (lbl_die, origin);
8487 add_name_and_src_coords_attributes (lbl_die, decl);
8489 if (DECL_ABSTRACT (decl))
8490 equate_decl_number_to_die (decl, lbl_die);
8493 insn = DECL_RTL (decl);
8494 if (GET_CODE (insn) == CODE_LABEL)
8496 /* When optimization is enabled (via -O) some parts of the compiler
8497 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8498 represent source-level labels which were explicitly declared by
8499 the user. This really shouldn't be happening though, so catch
8500 it if it ever does happen. */
8501 if (INSN_DELETED_P (insn))
8504 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8505 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8506 (unsigned) INSN_UID (insn));
8507 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8512 /* Generate a DIE for a lexical block. */
8515 gen_lexical_block_die (stmt, context_die, depth)
8517 register dw_die_ref context_die;
8520 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8521 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8523 if (! BLOCK_ABSTRACT (stmt))
8525 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8527 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8528 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8529 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8532 push_decl_scope (stmt);
8533 decls_for_scope (stmt, stmt_die, depth);
8537 /* Generate a DIE for an inlined subprogram. */
8540 gen_inlined_subroutine_die (stmt, context_die, depth)
8542 register dw_die_ref context_die;
8545 if (! BLOCK_ABSTRACT (stmt))
8547 register dw_die_ref subr_die
8548 = new_die (DW_TAG_inlined_subroutine, context_die);
8549 register tree decl = block_ultimate_origin (stmt);
8550 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8552 add_abstract_origin_attribute (subr_die, decl);
8553 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8555 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8556 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8557 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8558 push_decl_scope (decl);
8559 decls_for_scope (stmt, subr_die, depth);
8561 current_function_has_inlines = 1;
8565 /* Generate a DIE for a field in a record, or structure. */
8568 gen_field_die (decl, context_die)
8570 register dw_die_ref context_die;
8572 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8574 add_name_and_src_coords_attributes (decl_die, decl);
8575 add_type_attribute (decl_die, member_declared_type (decl),
8576 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8579 /* If this is a bit field... */
8580 if (DECL_BIT_FIELD_TYPE (decl))
8582 add_byte_size_attribute (decl_die, decl);
8583 add_bit_size_attribute (decl_die, decl);
8584 add_bit_offset_attribute (decl_die, decl);
8587 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8588 add_data_member_location_attribute (decl_die, decl);
8590 if (DECL_ARTIFICIAL (decl))
8591 add_AT_flag (decl_die, DW_AT_artificial, 1);
8593 if (TREE_PROTECTED (decl))
8594 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8596 else if (TREE_PRIVATE (decl))
8597 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8601 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8602 Use modified_type_die instead.
8603 We keep this code here just in case these types of DIEs may be needed to
8604 represent certain things in other languages (e.g. Pascal) someday. */
8606 gen_pointer_type_die (type, context_die)
8608 register dw_die_ref context_die;
8610 register dw_die_ref ptr_die
8611 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8613 equate_type_number_to_die (type, ptr_die);
8614 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8615 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8618 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8619 Use modified_type_die instead.
8620 We keep this code here just in case these types of DIEs may be needed to
8621 represent certain things in other languages (e.g. Pascal) someday. */
8623 gen_reference_type_die (type, context_die)
8625 register dw_die_ref context_die;
8627 register dw_die_ref ref_die
8628 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8630 equate_type_number_to_die (type, ref_die);
8631 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8632 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8636 /* Generate a DIE for a pointer to a member type. */
8638 gen_ptr_to_mbr_type_die (type, context_die)
8640 register dw_die_ref context_die;
8642 register dw_die_ref ptr_die
8643 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8645 equate_type_number_to_die (type, ptr_die);
8646 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8647 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8648 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8651 /* Generate the DIE for the compilation unit. */
8654 gen_compile_unit_die (main_input_filename)
8655 register char *main_input_filename;
8658 char *wd = getpwd ();
8660 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8661 add_name_attribute (comp_unit_die, main_input_filename);
8664 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8666 sprintf (producer, "%s %s", language_string, version_string);
8668 #ifdef MIPS_DEBUGGING_INFO
8669 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8670 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8671 not appear in the producer string, the debugger reaches the conclusion
8672 that the object file is stripped and has no debugging information.
8673 To get the MIPS/SGI debugger to believe that there is debugging
8674 information in the object file, we add a -g to the producer string. */
8675 if (debug_info_level > DINFO_LEVEL_TERSE)
8676 strcat (producer, " -g");
8679 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8681 if (strcmp (language_string, "GNU C++") == 0)
8682 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8684 else if (strcmp (language_string, "GNU Ada") == 0)
8685 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8687 else if (strcmp (language_string, "GNU F77") == 0)
8688 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8690 else if (strcmp (language_string, "GNU Pascal") == 0)
8691 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8693 else if (flag_traditional)
8694 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8697 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8699 #if 0 /* unimplemented */
8700 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8701 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8705 /* Generate a DIE for a string type. */
8708 gen_string_type_die (type, context_die)
8710 register dw_die_ref context_die;
8712 register dw_die_ref type_die
8713 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8715 equate_type_number_to_die (type, type_die);
8717 /* Fudge the string length attribute for now. */
8719 /* TODO: add string length info.
8720 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8721 bound_representation (upper_bound, 0, 'u'); */
8724 /* Generate the DIE for a base class. */
8727 gen_inheritance_die (binfo, context_die)
8728 register tree binfo;
8729 register dw_die_ref context_die;
8731 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8733 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8734 add_data_member_location_attribute (die, binfo);
8736 if (TREE_VIA_VIRTUAL (binfo))
8737 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
8738 if (TREE_VIA_PUBLIC (binfo))
8739 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
8740 else if (TREE_VIA_PROTECTED (binfo))
8741 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
8744 /* Generate a DIE for a class member. */
8747 gen_member_die (type, context_die)
8749 register dw_die_ref context_die;
8751 register tree member;
8753 /* If this is not an incomplete type, output descriptions of each of its
8754 members. Note that as we output the DIEs necessary to represent the
8755 members of this record or union type, we will also be trying to output
8756 DIEs to represent the *types* of those members. However the `type'
8757 function (above) will specifically avoid generating type DIEs for member
8758 types *within* the list of member DIEs for this (containing) type execpt
8759 for those types (of members) which are explicitly marked as also being
8760 members of this (containing) type themselves. The g++ front- end can
8761 force any given type to be treated as a member of some other
8762 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8763 to point to the TREE node representing the appropriate (containing)
8766 /* First output info about the base classes. */
8767 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
8769 register tree bases = TYPE_BINFO_BASETYPES (type);
8770 register int n_bases = TREE_VEC_LENGTH (bases);
8773 for (i = 0; i < n_bases; i++)
8774 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
8777 /* Now output info about the data members and type members. */
8778 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
8779 gen_decl_die (member, context_die);
8781 /* Now output info about the function members (if any). */
8782 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
8783 gen_decl_die (member, context_die);
8786 /* Generate a DIE for a structure or union type. */
8789 gen_struct_or_union_type_die (type, context_die)
8791 register dw_die_ref context_die;
8793 register dw_die_ref type_die = lookup_type_die (type);
8794 register dw_die_ref scope_die = 0;
8795 register int nested = 0;
8797 if (type_die && ! TYPE_SIZE (type))
8800 if (TYPE_CONTEXT (type) != NULL_TREE
8801 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't')
8804 scope_die = scope_die_for (type, context_die);
8806 if (! type_die || (nested && scope_die == comp_unit_die))
8807 /* First occurrence of type or toplevel definition of nested class. */
8809 register dw_die_ref old_die = type_die;
8811 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
8812 ? DW_TAG_structure_type : DW_TAG_union_type,
8814 equate_type_number_to_die (type, type_die);
8815 add_name_attribute (type_die, type_tag (type));
8817 add_AT_die_ref (type_die, DW_AT_specification, old_die);
8820 remove_AT (type_die, DW_AT_declaration);
8822 /* If we're not in the right context to be defining this type, defer to
8823 avoid tricky recursion. */
8824 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
8826 add_AT_flag (type_die, DW_AT_declaration, 1);
8829 /* If this type has been completed, then give it a byte_size attribute and
8830 then give a list of members. */
8831 else if (TYPE_SIZE (type))
8833 /* Prevent infinite recursion in cases where the type of some member of
8834 this type is expressed in terms of this type itself. */
8835 TREE_ASM_WRITTEN (type) = 1;
8836 add_byte_size_attribute (type_die, type);
8837 if (TYPE_STUB_DECL (type) != NULL_TREE)
8838 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8840 /* If the first reference to this type was as the return type of an
8841 inline function, then it may not have a parent. Fix this now. */
8842 if (type_die->die_parent == NULL)
8843 add_child_die (scope_die, type_die);
8845 push_decl_scope (type);
8846 gen_member_die (type, type_die);
8849 /* GNU extension: Record what type our vtable lives in. */
8850 if (TYPE_VFIELD (type))
8852 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
8854 gen_type_die (vtype, context_die);
8855 add_AT_die_ref (type_die, DW_AT_containing_type,
8856 lookup_type_die (vtype));
8860 add_AT_flag (type_die, DW_AT_declaration, 1);
8863 /* Generate a DIE for a subroutine _type_. */
8866 gen_subroutine_type_die (type, context_die)
8868 register dw_die_ref context_die;
8870 register tree return_type = TREE_TYPE (type);
8871 register dw_die_ref subr_die
8872 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
8874 equate_type_number_to_die (type, subr_die);
8875 add_prototyped_attribute (subr_die, type);
8876 add_type_attribute (subr_die, return_type, 0, 0, context_die);
8877 gen_formal_types_die (type, subr_die);
8880 /* Generate a DIE for a type definition */
8883 gen_typedef_die (decl, context_die)
8885 register dw_die_ref context_die;
8887 register dw_die_ref type_die;
8888 register tree origin;
8890 if (TREE_ASM_WRITTEN (decl))
8892 TREE_ASM_WRITTEN (decl) = 1;
8894 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
8895 origin = decl_ultimate_origin (decl);
8897 add_abstract_origin_attribute (type_die, origin);
8901 add_name_and_src_coords_attributes (type_die, decl);
8902 if (DECL_ORIGINAL_TYPE (decl))
8904 type = DECL_ORIGINAL_TYPE (decl);
8905 equate_type_number_to_die (TREE_TYPE (decl), type_die);
8908 type = TREE_TYPE (decl);
8909 add_type_attribute (type_die, type, TREE_READONLY (decl),
8910 TREE_THIS_VOLATILE (decl), context_die);
8913 if (DECL_ABSTRACT (decl))
8914 equate_decl_number_to_die (decl, type_die);
8917 /* Generate a type description DIE. */
8920 gen_type_die (type, context_die)
8922 register dw_die_ref context_die;
8924 if (type == NULL_TREE || type == error_mark_node)
8927 /* We are going to output a DIE to represent the unqualified version of
8928 this type (i.e. without any const or volatile qualifiers) so get the
8929 main variant (i.e. the unqualified version) of this type now. */
8930 type = type_main_variant (type);
8932 if (TREE_ASM_WRITTEN (type))
8935 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8936 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
8938 TREE_ASM_WRITTEN (type) = 1;
8939 gen_decl_die (TYPE_NAME (type), context_die);
8943 switch (TREE_CODE (type))
8949 case REFERENCE_TYPE:
8950 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8951 ensures that the gen_type_die recursion will terminate even if the
8952 type is recursive. Recursive types are possible in Ada. */
8953 /* ??? We could perhaps do this for all types before the switch
8955 TREE_ASM_WRITTEN (type) = 1;
8957 /* For these types, all that is required is that we output a DIE (or a
8958 set of DIEs) to represent the "basis" type. */
8959 gen_type_die (TREE_TYPE (type), context_die);
8963 /* This code is used for C++ pointer-to-data-member types.
8964 Output a description of the relevant class type. */
8965 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
8967 /* Output a description of the type of the object pointed to. */
8968 gen_type_die (TREE_TYPE (type), context_die);
8970 /* Now output a DIE to represent this pointer-to-data-member type
8972 gen_ptr_to_mbr_type_die (type, context_die);
8976 gen_type_die (TYPE_DOMAIN (type), context_die);
8977 gen_set_type_die (type, context_die);
8981 gen_type_die (TREE_TYPE (type), context_die);
8982 abort (); /* No way to represent these in Dwarf yet! */
8986 /* Force out return type (in case it wasn't forced out already). */
8987 gen_type_die (TREE_TYPE (type), context_die);
8988 gen_subroutine_type_die (type, context_die);
8992 /* Force out return type (in case it wasn't forced out already). */
8993 gen_type_die (TREE_TYPE (type), context_die);
8994 gen_subroutine_type_die (type, context_die);
8998 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9000 gen_type_die (TREE_TYPE (type), context_die);
9001 gen_string_type_die (type, context_die);
9004 gen_array_type_die (type, context_die);
9010 case QUAL_UNION_TYPE:
9011 /* If this is a nested type whose containing class hasn't been
9012 written out yet, writing it out will cover this one, too. */
9013 if (TYPE_CONTEXT (type)
9014 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9015 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9017 gen_type_die (TYPE_CONTEXT (type), context_die);
9019 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9022 /* If that failed, attach ourselves to the stub. */
9023 push_decl_scope (TYPE_CONTEXT (type));
9024 context_die = lookup_type_die (TYPE_CONTEXT (type));
9027 if (TREE_CODE (type) == ENUMERAL_TYPE)
9028 gen_enumeration_type_die (type, context_die);
9030 gen_struct_or_union_type_die (type, context_die);
9032 if (TYPE_CONTEXT (type)
9033 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9034 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9037 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9038 it up if it is ever completed. gen_*_type_die will set it for us
9039 when appropriate. */
9048 /* No DIEs needed for fundamental types. */
9052 /* No Dwarf representation currently defined. */
9059 TREE_ASM_WRITTEN (type) = 1;
9062 /* Generate a DIE for a tagged type instantiation. */
9065 gen_tagged_type_instantiation_die (type, context_die)
9067 register dw_die_ref context_die;
9069 if (type == NULL_TREE || type == error_mark_node)
9072 /* We are going to output a DIE to represent the unqualified version of
9073 this type (i.e. without any const or volatile qualifiers) so make sure
9074 that we have the main variant (i.e. the unqualified version) of this
9076 if (type != type_main_variant (type)
9077 || !TREE_ASM_WRITTEN (type))
9080 switch (TREE_CODE (type))
9086 gen_inlined_enumeration_type_die (type, context_die);
9090 gen_inlined_structure_type_die (type, context_die);
9094 case QUAL_UNION_TYPE:
9095 gen_inlined_union_type_die (type, context_die);
9103 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9104 things which are local to the given block. */
9107 gen_block_die (stmt, context_die, depth)
9109 register dw_die_ref context_die;
9112 register int must_output_die = 0;
9113 register tree origin;
9115 register enum tree_code origin_code;
9117 /* Ignore blocks never really used to make RTL. */
9119 if (stmt == NULL_TREE || !TREE_USED (stmt))
9122 /* Determine the "ultimate origin" of this block. This block may be an
9123 inlined instance of an inlined instance of inline function, so we have
9124 to trace all of the way back through the origin chain to find out what
9125 sort of node actually served as the original seed for the creation of
9126 the current block. */
9127 origin = block_ultimate_origin (stmt);
9128 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9130 /* Determine if we need to output any Dwarf DIEs at all to represent this
9132 if (origin_code == FUNCTION_DECL)
9133 /* The outer scopes for inlinings *must* always be represented. We
9134 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9135 must_output_die = 1;
9138 /* In the case where the current block represents an inlining of the
9139 "body block" of an inline function, we must *NOT* output any DIE for
9140 this block because we have already output a DIE to represent the
9141 whole inlined function scope and the "body block" of any function
9142 doesn't really represent a different scope according to ANSI C
9143 rules. So we check here to make sure that this block does not
9144 represent a "body block inlining" before trying to set the
9145 `must_output_die' flag. */
9146 if (! is_body_block (origin ? origin : stmt))
9148 /* Determine if this block directly contains any "significant"
9149 local declarations which we will need to output DIEs for. */
9150 if (debug_info_level > DINFO_LEVEL_TERSE)
9151 /* We are not in terse mode so *any* local declaration counts
9152 as being a "significant" one. */
9153 must_output_die = (BLOCK_VARS (stmt) != NULL);
9155 /* We are in terse mode, so only local (nested) function
9156 definitions count as "significant" local declarations. */
9157 for (decl = BLOCK_VARS (stmt);
9158 decl != NULL; decl = TREE_CHAIN (decl))
9159 if (TREE_CODE (decl) == FUNCTION_DECL
9160 && DECL_INITIAL (decl))
9162 must_output_die = 1;
9168 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9169 DIE for any block which contains no significant local declarations at
9170 all. Rather, in such cases we just call `decls_for_scope' so that any
9171 needed Dwarf info for any sub-blocks will get properly generated. Note
9172 that in terse mode, our definition of what constitutes a "significant"
9173 local declaration gets restricted to include only inlined function
9174 instances and local (nested) function definitions. */
9175 if (must_output_die)
9177 if (origin_code == FUNCTION_DECL)
9178 gen_inlined_subroutine_die (stmt, context_die, depth);
9180 gen_lexical_block_die (stmt, context_die, depth);
9183 decls_for_scope (stmt, context_die, depth);
9186 /* Generate all of the decls declared within a given scope and (recursively)
9187 all of it's sub-blocks. */
9190 decls_for_scope (stmt, context_die, depth)
9192 register dw_die_ref context_die;
9196 register tree subblocks;
9198 /* Ignore blocks never really used to make RTL. */
9199 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9202 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9203 next_block_number++;
9205 /* Output the DIEs to represent all of the data objects and typedefs
9206 declared directly within this block but not within any nested
9207 sub-blocks. Also, nested function and tag DIEs have been
9208 generated with a parent of NULL; fix that up now. */
9209 for (decl = BLOCK_VARS (stmt);
9210 decl != NULL; decl = TREE_CHAIN (decl))
9212 register dw_die_ref die;
9214 if (TREE_CODE (decl) == FUNCTION_DECL)
9215 die = lookup_decl_die (decl);
9216 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9217 die = lookup_type_die (TREE_TYPE (decl));
9221 if (die != NULL && die->die_parent == NULL)
9222 add_child_die (context_die, die);
9224 gen_decl_die (decl, context_die);
9227 /* Output the DIEs to represent all sub-blocks (and the items declared
9228 therein) of this block. */
9229 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9231 subblocks = BLOCK_CHAIN (subblocks))
9232 gen_block_die (subblocks, context_die, depth + 1);
9235 /* Is this a typedef we can avoid emitting? */
9238 is_redundant_typedef (decl)
9241 if (TYPE_DECL_IS_STUB (decl))
9244 if (DECL_ARTIFICIAL (decl)
9245 && DECL_CONTEXT (decl)
9246 && is_tagged_type (DECL_CONTEXT (decl))
9247 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9248 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9249 /* Also ignore the artificial member typedef for the class name. */
9255 /* Generate Dwarf debug information for a decl described by DECL. */
9258 gen_decl_die (decl, context_die)
9260 register dw_die_ref context_die;
9262 register tree origin;
9264 /* Make a note of the decl node we are going to be working on. We may need
9265 to give the user the source coordinates of where it appeared in case we
9266 notice (later on) that something about it looks screwy. */
9267 dwarf_last_decl = decl;
9269 if (TREE_CODE (decl) == ERROR_MARK)
9272 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9273 ignore a function definition, since that would screw up our count of
9274 blocks, and that in turn will completely screw up the labels we will
9275 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9276 subsequent blocks). */
9277 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9280 switch (TREE_CODE (decl))
9283 /* The individual enumerators of an enum type get output when we output
9284 the Dwarf representation of the relevant enum type itself. */
9288 /* Don't output any DIEs to represent mere function declarations,
9289 unless they are class members or explicit block externs. */
9290 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9291 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9294 if (debug_info_level > DINFO_LEVEL_TERSE)
9296 /* Before we describe the FUNCTION_DECL itself, make sure that we
9297 have described its return type. */
9298 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9300 /* And its containing type. */
9301 origin = decl_class_context (decl);
9302 if (origin != NULL_TREE)
9303 gen_type_die (origin, context_die);
9305 /* And its virtual context. */
9306 if (DECL_VINDEX (decl) != NULL_TREE)
9307 gen_type_die (DECL_CONTEXT (decl), context_die);
9310 /* Now output a DIE to represent the function itself. */
9311 gen_subprogram_die (decl, context_die);
9315 /* If we are in terse mode, don't generate any DIEs to represent any
9317 if (debug_info_level <= DINFO_LEVEL_TERSE)
9320 /* In the special case of a TYPE_DECL node representing the
9321 declaration of some type tag, if the given TYPE_DECL is marked as
9322 having been instantiated from some other (original) TYPE_DECL node
9323 (e.g. one which was generated within the original definition of an
9324 inline function) we have to generate a special (abbreviated)
9325 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9327 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9329 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9333 if (is_redundant_typedef (decl))
9334 gen_type_die (TREE_TYPE (decl), context_die);
9336 /* Output a DIE to represent the typedef itself. */
9337 gen_typedef_die (decl, context_die);
9341 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9342 gen_label_die (decl, context_die);
9346 /* If we are in terse mode, don't generate any DIEs to represent any
9347 variable declarations or definitions. */
9348 if (debug_info_level <= DINFO_LEVEL_TERSE)
9351 /* Output any DIEs that are needed to specify the type of this data
9353 gen_type_die (TREE_TYPE (decl), context_die);
9355 /* And its containing type. */
9356 origin = decl_class_context (decl);
9357 if (origin != NULL_TREE)
9358 gen_type_die (origin, context_die);
9360 /* Now output the DIE to represent the data object itself. This gets
9361 complicated because of the possibility that the VAR_DECL really
9362 represents an inlined instance of a formal parameter for an inline
9364 origin = decl_ultimate_origin (decl);
9365 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9366 gen_formal_parameter_die (decl, context_die);
9368 gen_variable_die (decl, context_die);
9372 /* Ignore the nameless fields that are used to skip bits, but
9373 handle C++ anonymous unions. */
9374 if (DECL_NAME (decl) != NULL_TREE
9375 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9377 gen_type_die (member_declared_type (decl), context_die);
9378 gen_field_die (decl, context_die);
9383 gen_type_die (TREE_TYPE (decl), context_die);
9384 gen_formal_parameter_die (decl, context_die);
9392 /* Write the debugging output for DECL. */
9395 dwarf2out_decl (decl)
9398 register dw_die_ref context_die = comp_unit_die;
9400 if (TREE_CODE (decl) == ERROR_MARK)
9403 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9404 hope that the node in question doesn't represent a function definition.
9405 If it does, then totally ignoring it is bound to screw up our count of
9406 blocks, and that in turn will completely screw up the labels we will
9407 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9408 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9409 own sequence numbers with them!) */
9410 if (DECL_IGNORED_P (decl))
9412 if (TREE_CODE (decl) == FUNCTION_DECL
9413 && DECL_INITIAL (decl) != NULL)
9419 switch (TREE_CODE (decl))
9422 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9423 builtin function. Explicit programmer-supplied declarations of
9424 these same functions should NOT be ignored however. */
9425 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9428 /* What we would really like to do here is to filter out all mere
9429 file-scope declarations of file-scope functions which are never
9430 referenced later within this translation unit (and keep all of ones
9431 that *are* referenced later on) but we aren't clairvoyant, so we have
9432 no idea which functions will be referenced in the future (i.e. later
9433 on within the current translation unit). So here we just ignore all
9434 file-scope function declarations which are not also definitions. If
9435 and when the debugger needs to know something about these functions,
9436 it wil have to hunt around and find the DWARF information associated
9437 with the definition of the function. Note that we can't just check
9438 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9439 definitions and which ones represent mere declarations. We have to
9440 check `DECL_INITIAL' instead. That's because the C front-end
9441 supports some weird semantics for "extern inline" function
9442 definitions. These can get inlined within the current translation
9443 unit (an thus, we need to generate DWARF info for their abstract
9444 instances so that the DWARF info for the concrete inlined instances
9445 can have something to refer to) but the compiler never generates any
9446 out-of-lines instances of such things (despite the fact that they
9447 *are* definitions). The important point is that the C front-end
9448 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9449 to generate DWARF for them anyway. Note that the C++ front-end also
9450 plays some similar games for inline function definitions appearing
9451 within include files which also contain
9452 `#pragma interface' pragmas. */
9453 if (DECL_INITIAL (decl) == NULL_TREE)
9456 /* If we're a nested function, initially use a parent of NULL; if we're
9457 a plain function, this will be fixed up in decls_for_scope. If
9458 we're a method, it will be ignored, since we already have a DIE. */
9459 if (decl_function_context (decl))
9465 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9466 declaration and if the declaration was never even referenced from
9467 within this entire compilation unit. We suppress these DIEs in
9468 order to save space in the .debug section (by eliminating entries
9469 which are probably useless). Note that we must not suppress
9470 block-local extern declarations (whether used or not) because that
9471 would screw-up the debugger's name lookup mechanism and cause it to
9472 miss things which really ought to be in scope at a given point. */
9473 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9476 /* If we are in terse mode, don't generate any DIEs to represent any
9477 variable declarations or definitions. */
9478 if (debug_info_level <= DINFO_LEVEL_TERSE)
9483 /* Don't bother trying to generate any DIEs to represent any of the
9484 normal built-in types for the language we are compiling. */
9485 if (DECL_SOURCE_LINE (decl) == 0)
9487 /* OK, we need to generate one for `bool' so GDB knows what type
9488 comparisons have. */
9489 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9490 == DW_LANG_C_plus_plus)
9491 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9492 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9497 /* If we are in terse mode, don't generate any DIEs for types. */
9498 if (debug_info_level <= DINFO_LEVEL_TERSE)
9501 /* If we're a function-scope tag, initially use a parent of NULL;
9502 this will be fixed up in decls_for_scope. */
9503 if (decl_function_context (decl))
9512 gen_decl_die (decl, context_die);
9513 output_pending_types_for_scope (comp_unit_die);
9516 /* Output a marker (i.e. a label) for the beginning of the generated code for
9520 dwarf2out_begin_block (blocknum)
9521 register unsigned blocknum;
9523 function_section (current_function_decl);
9524 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9527 /* Output a marker (i.e. a label) for the end of the generated code for a
9531 dwarf2out_end_block (blocknum)
9532 register unsigned blocknum;
9534 function_section (current_function_decl);
9535 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9538 /* Output a marker (i.e. a label) at a point in the assembly code which
9539 corresponds to a given source level label. */
9542 dwarf2out_label (insn)
9545 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9547 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9549 function_section (current_function_decl);
9550 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9551 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9552 (unsigned) INSN_UID (insn));
9556 /* Lookup a filename (in the list of filenames that we know about here in
9557 dwarf2out.c) and return its "index". The index of each (known) filename is
9558 just a unique number which is associated with only that one filename.
9559 We need such numbers for the sake of generating labels
9560 (in the .debug_sfnames section) and references to those
9561 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9562 If the filename given as an argument is not found in our current list,
9563 add it to the list and assign it the next available unique index number.
9564 In order to speed up searches, we remember the index of the filename
9565 was looked up last. This handles the majority of all searches. */
9568 lookup_filename (file_name)
9571 static unsigned last_file_lookup_index = 0;
9572 register unsigned i;
9574 /* Check to see if the file name that was searched on the previous call
9575 matches this file name. If so, return the index. */
9576 if (last_file_lookup_index != 0)
9577 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9578 return last_file_lookup_index;
9580 /* Didn't match the previous lookup, search the table */
9581 for (i = 1; i < file_table_in_use; ++i)
9582 if (strcmp (file_name, file_table[i]) == 0)
9584 last_file_lookup_index = i;
9588 /* Prepare to add a new table entry by making sure there is enough space in
9589 the table to do so. If not, expand the current table. */
9590 if (file_table_in_use == file_table_allocated)
9592 file_table_allocated += FILE_TABLE_INCREMENT;
9594 = (char **) xrealloc (file_table,
9595 file_table_allocated * sizeof (char *));
9598 /* Add the new entry to the end of the filename table. */
9599 file_table[file_table_in_use] = xstrdup (file_name);
9600 last_file_lookup_index = file_table_in_use++;
9602 return last_file_lookup_index;
9605 /* Output a label to mark the beginning of a source code line entry
9606 and record information relating to this source line, in
9607 'line_info_table' for later output of the .debug_line section. */
9610 dwarf2out_line (filename, line)
9611 register char *filename;
9612 register unsigned line;
9614 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9616 function_section (current_function_decl);
9618 if (DECL_SECTION_NAME (current_function_decl))
9620 register dw_separate_line_info_ref line_info;
9621 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9622 separate_line_info_table_in_use);
9623 fputc ('\n', asm_out_file);
9625 /* expand the line info table if necessary */
9626 if (separate_line_info_table_in_use
9627 == separate_line_info_table_allocated)
9629 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9630 separate_line_info_table
9631 = (dw_separate_line_info_ref)
9632 xrealloc (separate_line_info_table,
9633 separate_line_info_table_allocated
9634 * sizeof (dw_separate_line_info_entry));
9637 /* Add the new entry at the end of the line_info_table. */
9639 = &separate_line_info_table[separate_line_info_table_in_use++];
9640 line_info->dw_file_num = lookup_filename (filename);
9641 line_info->dw_line_num = line;
9642 line_info->function = current_funcdef_number;
9646 register dw_line_info_ref line_info;
9648 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9649 line_info_table_in_use);
9650 fputc ('\n', asm_out_file);
9652 /* Expand the line info table if necessary. */
9653 if (line_info_table_in_use == line_info_table_allocated)
9655 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9657 = (dw_line_info_ref)
9658 xrealloc (line_info_table,
9659 (line_info_table_allocated
9660 * sizeof (dw_line_info_entry)));
9663 /* Add the new entry at the end of the line_info_table. */
9664 line_info = &line_info_table[line_info_table_in_use++];
9665 line_info->dw_file_num = lookup_filename (filename);
9666 line_info->dw_line_num = line;
9671 /* Record the beginning of a new source file, for later output
9672 of the .debug_macinfo section. At present, unimplemented. */
9675 dwarf2out_start_source_file (filename)
9676 register char *filename;
9680 /* Record the end of a source file, for later output
9681 of the .debug_macinfo section. At present, unimplemented. */
9684 dwarf2out_end_source_file ()
9688 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9689 the tail part of the directive line, i.e. the part which is past the
9690 initial whitespace, #, whitespace, directive-name, whitespace part. */
9693 dwarf2out_define (lineno, buffer)
9694 register unsigned lineno;
9695 register char *buffer;
9697 static int initialized = 0;
9700 dwarf2out_start_source_file (primary_filename);
9705 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9706 the tail part of the directive line, i.e. the part which is past the
9707 initial whitespace, #, whitespace, directive-name, whitespace part. */
9710 dwarf2out_undef (lineno, buffer)
9711 register unsigned lineno;
9712 register char *buffer;
9716 /* Set up for Dwarf output at the start of compilation. */
9719 dwarf2out_init (asm_out_file, main_input_filename)
9720 register FILE *asm_out_file;
9721 register char *main_input_filename;
9723 /* Remember the name of the primary input file. */
9724 primary_filename = main_input_filename;
9726 /* Allocate the initial hunk of the file_table. */
9727 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
9728 bzero ((char *) file_table, FILE_TABLE_INCREMENT * sizeof (char *));
9729 file_table_allocated = FILE_TABLE_INCREMENT;
9731 /* Skip the first entry - file numbers begin at 1. */
9732 file_table_in_use = 1;
9734 /* Allocate the initial hunk of the decl_die_table. */
9736 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9737 bzero ((char *) decl_die_table,
9738 DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9739 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
9740 decl_die_table_in_use = 0;
9742 /* Allocate the initial hunk of the decl_scope_table. */
9744 = (decl_scope_node *) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9745 * sizeof (decl_scope_node));
9746 bzero ((char *) decl_scope_table,
9747 DECL_SCOPE_TABLE_INCREMENT * sizeof (decl_scope_node));
9748 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
9749 decl_scope_depth = 0;
9751 /* Allocate the initial hunk of the abbrev_die_table. */
9753 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9754 * sizeof (dw_die_ref));
9755 bzero ((char *) abbrev_die_table,
9756 ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9757 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
9758 /* Zero-th entry is allocated, but unused */
9759 abbrev_die_table_in_use = 1;
9761 /* Allocate the initial hunk of the line_info_table. */
9763 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
9764 * sizeof (dw_line_info_entry));
9765 bzero ((char *) line_info_table,
9766 LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry));
9767 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
9768 /* Zero-th entry is allocated, but unused */
9769 line_info_table_in_use = 1;
9771 /* Generate the initial DIE for the .debug section. Note that the (string)
9772 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9773 will (typically) be a relative pathname and that this pathname should be
9774 taken as being relative to the directory from which the compiler was
9775 invoked when the given (base) source file was compiled. */
9776 gen_compile_unit_die (main_input_filename);
9778 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
9781 /* Output stuff that dwarf requires at the end of every file,
9782 and generate the DWARF-2 debugging info. */
9787 limbo_die_node *node, *next_node;
9791 /* Traverse the limbo die list, and add parent/child links. The only
9792 dies without parents that should be here are concrete instances of
9793 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9794 For concrete instances, we can get the parent die from the abstract
9796 for (node = limbo_die_list; node; node = next_node)
9798 next_node = node->next;
9801 if (die->die_parent == NULL)
9803 a = get_AT (die, DW_AT_abstract_origin);
9805 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
9806 else if (die == comp_unit_die)
9814 /* Traverse the DIE tree and add sibling attributes to those DIE's
9815 that have children. */
9816 add_sibling_attributes (comp_unit_die);
9818 /* Output a terminator label for the .text section. */
9819 fputc ('\n', asm_out_file);
9820 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
9821 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
9824 /* Output a terminator label for the .data section. */
9825 fputc ('\n', asm_out_file);
9826 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
9827 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
9829 /* Output a terminator label for the .bss section. */
9830 fputc ('\n', asm_out_file);
9831 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
9832 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
9835 /* Output the source line correspondence table. */
9836 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
9838 fputc ('\n', asm_out_file);
9839 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
9840 output_line_info ();
9842 /* We can only use the low/high_pc attributes if all of the code
9844 if (separate_line_info_table_in_use == 0)
9846 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, TEXT_SECTION);
9847 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
9850 add_AT_section_offset (comp_unit_die, DW_AT_stmt_list, DEBUG_LINE_SECTION);
9853 /* Output the abbreviation table. */
9854 fputc ('\n', asm_out_file);
9855 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
9856 build_abbrev_table (comp_unit_die);
9857 output_abbrev_section ();
9859 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9860 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
9861 calc_die_sizes (comp_unit_die);
9863 /* Output debugging information. */
9864 fputc ('\n', asm_out_file);
9865 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
9866 output_compilation_unit_header ();
9867 output_die (comp_unit_die);
9869 if (pubname_table_in_use)
9871 /* Output public names table. */
9872 fputc ('\n', asm_out_file);
9873 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
9877 if (fde_table_in_use)
9879 /* Output the address range information. */
9880 fputc ('\n', asm_out_file);
9881 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
9885 #endif /* DWARF2_DEBUGGING_INFO */