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"
43 #include "dwarf2out.h"
46 /* We cannot use <assert.h> in GCC source, since that would include
47 GCC's assert.h, which may not be compatible with the host compiler. */
52 # define assert(e) do { if (! (e)) abort (); } while (0)
55 /* Decide whether we want to emit frame unwind information for the current
61 return (write_symbols == DWARF2_DEBUG
62 #ifdef DWARF2_UNWIND_INFO
63 || (flag_exceptions && ! exceptions_via_longjmp)
68 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
74 /* How to start an assembler comment. */
75 #ifndef ASM_COMMENT_START
76 #define ASM_COMMENT_START ";#"
79 typedef struct dw_cfi_struct *dw_cfi_ref;
80 typedef struct dw_fde_struct *dw_fde_ref;
81 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
83 /* Call frames are described using a sequence of Call Frame
84 Information instructions. The register number, offset
85 and address fields are provided as possible operands;
86 their use is selected by the opcode field. */
88 typedef union dw_cfi_oprnd_struct
90 unsigned long dw_cfi_reg_num;
91 long int dw_cfi_offset;
96 typedef struct dw_cfi_struct
98 dw_cfi_ref dw_cfi_next;
99 enum dwarf_call_frame_info dw_cfi_opc;
100 dw_cfi_oprnd dw_cfi_oprnd1;
101 dw_cfi_oprnd dw_cfi_oprnd2;
105 /* All call frame descriptions (FDE's) in the GCC generated DWARF
106 refer to a single Common Information Entry (CIE), defined at
107 the beginning of the .debug_frame section. This used of a single
108 CIE obviates the need to keep track of multiple CIE's
109 in the DWARF generation routines below. */
111 typedef struct dw_fde_struct
114 char *dw_fde_current_label;
116 dw_cfi_ref dw_fde_cfi;
120 /* Maximum size (in bytes) of an artificially generated label. */
121 #define MAX_ARTIFICIAL_LABEL_BYTES 30
123 /* Make sure we know the sizes of the various types dwarf can describe. These
124 are only defaults. If the sizes are different for your target, you should
125 override these values by defining the appropriate symbols in your tm.h
128 #ifndef CHAR_TYPE_SIZE
129 #define CHAR_TYPE_SIZE BITS_PER_UNIT
132 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
135 /* The size in bytes of a DWARF field indicating an offset or length
136 relative to a debug info section, specified to be 4 bytes in the DWARF-2
137 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
139 #ifndef DWARF_OFFSET_SIZE
140 #define DWARF_OFFSET_SIZE 4
143 #define DWARF_VERSION 2
145 /* Round SIZE up to the nearest BOUNDARY. */
146 #define DWARF_ROUND(SIZE,BOUNDARY) \
147 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
149 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
150 #ifdef STACK_GROWS_DOWNWARD
151 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
153 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
156 /* A pointer to the base of a table that contains frame description
157 information for each routine. */
158 static dw_fde_ref fde_table;
160 /* Number of elements currently allocated for fde_table. */
161 static unsigned fde_table_allocated;
163 /* Number of elements in fde_table currently in use. */
164 static unsigned fde_table_in_use;
166 /* Size (in elements) of increments by which we may expand the
168 #define FDE_TABLE_INCREMENT 256
170 /* A list of call frame insns for the CIE. */
171 static dw_cfi_ref cie_cfi_head;
173 /* The number of the current function definition for which debugging
174 information is being generated. These numbers range from 1 up to the
175 maximum number of function definitions contained within the current
176 compilation unit. These numbers are used to create unique label id's
177 unique to each function definition. */
178 static unsigned current_funcdef_number = 0;
180 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
181 attribute that accelerates the lookup of the FDE associated
182 with the subprogram. This variable holds the table index of the FDE
183 associated with the current function (body) definition. */
184 static unsigned current_funcdef_fde;
186 /* Forward declarations for functions defined in this file. */
188 static char *stripattributes PROTO((char *));
189 static char *dwarf_cfi_name PROTO((unsigned));
190 static dw_cfi_ref new_cfi PROTO((void));
191 static void add_cfi PROTO((dw_cfi_ref *, dw_cfi_ref));
192 static unsigned long size_of_uleb128 PROTO((unsigned long));
193 static unsigned long size_of_sleb128 PROTO((long));
194 static void output_uleb128 PROTO((unsigned long));
195 static void output_sleb128 PROTO((long));
196 static void add_fde_cfi PROTO((char *, dw_cfi_ref));
197 static void lookup_cfa_1 PROTO((dw_cfi_ref, unsigned long *,
199 static void lookup_cfa PROTO((unsigned long *, long *));
200 static void reg_save PROTO((char *, unsigned, unsigned,
202 static void initial_return_save PROTO((rtx));
203 static void output_cfi PROTO((dw_cfi_ref, dw_fde_ref));
204 static void output_call_frame_info PROTO((int));
205 static unsigned reg_number PROTO((rtx));
206 static void dwarf2out_stack_adjust PROTO((rtx));
208 /* Definitions of defaults for assembler-dependent names of various
209 pseudo-ops and section names.
210 Theses may be overridden in the tm.h file (if necessary) for a particular
213 #ifdef OBJECT_FORMAT_ELF
214 #ifndef UNALIGNED_SHORT_ASM_OP
215 #define UNALIGNED_SHORT_ASM_OP ".2byte"
217 #ifndef UNALIGNED_INT_ASM_OP
218 #define UNALIGNED_INT_ASM_OP ".4byte"
220 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
221 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
223 #endif /* OBJECT_FORMAT_ELF */
226 #define ASM_BYTE_OP ".byte"
229 /* Data and reference forms for relocatable data. */
230 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
231 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
233 /* Pseudo-op for defining a new section. */
234 #ifndef SECTION_ASM_OP
235 #define SECTION_ASM_OP ".section"
238 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
239 print the SECTION_ASM_OP and the section name. The default here works for
240 almost all svr4 assemblers, except for the sparc, where the section name
241 must be enclosed in double quotes. (See sparcv4.h). */
242 #ifndef SECTION_FORMAT
243 #ifdef PUSHSECTION_FORMAT
244 #define SECTION_FORMAT PUSHSECTION_FORMAT
246 #define SECTION_FORMAT "\t%s\t%s\n"
250 #ifndef FRAME_SECTION
251 #define FRAME_SECTION ".debug_frame"
254 #ifndef FUNC_BEGIN_LABEL
255 #define FUNC_BEGIN_LABEL "LFB"
257 #ifndef FUNC_END_LABEL
258 #define FUNC_END_LABEL "LFE"
260 #define CIE_AFTER_SIZE_LABEL "LSCIE"
261 #define CIE_END_LABEL "LECIE"
262 #define CIE_LENGTH_LABEL "LLCIE"
263 #define FDE_AFTER_SIZE_LABEL "LSFDE"
264 #define FDE_END_LABEL "LEFDE"
265 #define FDE_LENGTH_LABEL "LLFDE"
267 /* Definitions of defaults for various types of primitive assembly language
268 output operations. These may be overridden from within the tm.h file,
269 but typically, that is unnecessary. */
271 #ifndef ASM_OUTPUT_SECTION
272 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
273 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
276 #ifndef ASM_OUTPUT_DWARF_DATA1
277 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
278 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, VALUE)
281 #ifndef ASM_OUTPUT_DWARF_DELTA1
282 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
283 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
284 assemble_name (FILE, LABEL1); \
285 fprintf (FILE, "-"); \
286 assemble_name (FILE, LABEL2); \
290 #ifdef UNALIGNED_INT_ASM_OP
292 #ifndef UNALIGNED_OFFSET_ASM_OP
293 #define UNALIGNED_OFFSET_ASM_OP \
294 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
297 #ifndef UNALIGNED_WORD_ASM_OP
298 #define UNALIGNED_WORD_ASM_OP \
299 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
302 #ifndef ASM_OUTPUT_DWARF_DELTA2
303 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
304 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
305 assemble_name (FILE, LABEL1); \
306 fprintf (FILE, "-"); \
307 assemble_name (FILE, LABEL2); \
311 #ifndef ASM_OUTPUT_DWARF_DELTA4
312 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
313 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
314 assemble_name (FILE, LABEL1); \
315 fprintf (FILE, "-"); \
316 assemble_name (FILE, LABEL2); \
320 #ifndef ASM_OUTPUT_DWARF_DELTA
321 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
322 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
323 assemble_name (FILE, LABEL1); \
324 fprintf (FILE, "-"); \
325 assemble_name (FILE, LABEL2); \
329 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
330 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
331 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
332 assemble_name (FILE, LABEL1); \
333 fprintf (FILE, "-"); \
334 assemble_name (FILE, LABEL2); \
338 #ifndef ASM_OUTPUT_DWARF_ADDR
339 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
340 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
341 assemble_name (FILE, LABEL); \
345 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
346 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
347 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
350 #ifndef ASM_OUTPUT_DWARF_OFFSET4
351 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
352 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
353 assemble_name (FILE, LABEL); \
357 #ifndef ASM_OUTPUT_DWARF_OFFSET
358 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
359 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
360 assemble_name (FILE, LABEL); \
364 #ifndef ASM_OUTPUT_DWARF_DATA2
365 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
366 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) VALUE)
369 #ifndef ASM_OUTPUT_DWARF_DATA4
370 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
371 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) VALUE)
374 #ifndef ASM_OUTPUT_DWARF_DATA
375 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
376 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
377 (unsigned long) VALUE)
380 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
381 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
382 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
383 (unsigned long) VALUE)
386 #ifndef ASM_OUTPUT_DWARF_DATA8
387 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
389 if (WORDS_BIG_ENDIAN) \
391 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
392 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
396 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
397 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
402 #else /* UNALIGNED_INT_ASM_OP */
404 /* We don't have unaligned support, let's hope the normal output works for
407 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
408 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
410 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
411 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
413 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
414 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
416 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
417 assemble_integer (gen_rtx_MINUS (HImode, \
418 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
419 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
422 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
423 assemble_integer (gen_rtx_MINUS (SImode, \
424 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
425 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
428 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
429 assemble_integer (gen_rtx_MINUS (Pmode, \
430 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
431 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
434 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
435 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
437 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
438 assemble_integer (GEN_INT (VALUE), 4, 1)
440 #endif /* UNALIGNED_INT_ASM_OP */
443 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
444 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
446 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
447 assemble_name (FILE, SY); \
449 assemble_name (FILE, HI); \
451 assemble_name (FILE, LO); \
454 #endif /* SET_ASM_OP */
456 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
457 newline is produced. When flag_debug_asm is asserted, we add commentary
458 at the end of the line, so we must avoid output of a newline here. */
459 #ifndef ASM_OUTPUT_DWARF_STRING
460 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
462 register int slen = strlen(P); \
463 register char *p = (P); \
465 fprintf (FILE, "\t.ascii \""); \
466 for (i = 0; i < slen; i++) \
468 register int c = p[i]; \
469 if (c == '\"' || c == '\\') \
471 if (c >= ' ' && c < 0177) \
475 fprintf (FILE, "\\%o", c); \
478 fprintf (FILE, "\\0\""); \
483 /* The DWARF 2 CFA column which tracks the return address. Normally this
484 is the column for PC, or the first column after all of the hard
486 #ifndef DWARF_FRAME_RETURN_COLUMN
488 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
490 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
494 /* The mapping from gcc register number to DWARF 2 CFA column number. By
495 default, we just provide columns for all registers. */
496 #ifndef DWARF_FRAME_REGNUM
497 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
500 /* Hook used by __throw. */
503 expand_builtin_dwarf_fp_regnum ()
505 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
508 /* The offset from the incoming value of %sp to the top of the stack frame
509 for the current function. */
510 #ifndef INCOMING_FRAME_SP_OFFSET
511 #define INCOMING_FRAME_SP_OFFSET 0
514 /* Return a pointer to a copy of the section string name S with all
515 attributes stripped off, and an asterisk prepended (for assemble_name). */
521 char *stripped = xmalloc (strlen (s) + 2);
526 while (*s && *s != ',')
533 /* Return the register number described by a given RTL node. */
539 register unsigned regno = REGNO (rtl);
541 if (regno >= FIRST_PSEUDO_REGISTER)
543 warning ("internal regno botch: regno = %d\n", regno);
547 regno = DBX_REGISTER_NUMBER (regno);
551 struct reg_size_range
558 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
559 We do this in kind of a roundabout way, by building up a list of
560 register size ranges and seeing where our register falls in one of those
561 ranges. We need to do it this way because REG_TREE is not a constant,
562 and the target macros were not designed to make this task easy. */
565 expand_builtin_dwarf_reg_size (reg_tree, target)
569 enum machine_mode mode;
571 struct reg_size_range ranges[5];
578 for (; i < FIRST_PSEUDO_REGISTER; ++i)
580 /* The return address is out of order on the MIPS, and we don't use
581 copy_reg for it anyway, so we don't care here how large it is. */
582 if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
585 mode = reg_raw_mode[i];
587 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
588 to use the same size as word_mode, since that reduces the number
589 of ranges we need. It should not matter, since the result should
590 never be used for a condition code register anyways. */
591 if (GET_MODE_CLASS (mode) == MODE_CC)
594 size = GET_MODE_SIZE (mode);
596 /* If this register is not valid in the specified mode and
597 we have a previous size, use that for the size of this
598 register to avoid making junk tiny ranges. */
599 if (! HARD_REGNO_MODE_OK (i, mode) && last_size != -1)
602 if (size != last_size)
604 ranges[n_ranges].beg = i;
605 ranges[n_ranges].size = last_size = size;
610 ranges[n_ranges-1].end = i;
613 /* The usual case: fp regs surrounded by general regs. */
614 if (n_ranges == 3 && ranges[0].size == ranges[2].size)
616 if ((DWARF_FRAME_REGNUM (ranges[1].end)
617 - DWARF_FRAME_REGNUM (ranges[1].beg))
618 != ranges[1].end - ranges[1].beg)
620 t = fold (build (GE_EXPR, integer_type_node, reg_tree,
621 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].beg), 0)));
622 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
623 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].end), 0)));
624 t = fold (build (TRUTH_ANDIF_EXPR, integer_type_node, t, t2));
625 t = fold (build (COND_EXPR, integer_type_node, t,
626 build_int_2 (ranges[1].size, 0),
627 build_int_2 (ranges[0].size, 0)));
632 t = build_int_2 (ranges[n_ranges].size, 0);
633 size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
636 if ((DWARF_FRAME_REGNUM (ranges[n_ranges].end)
637 - DWARF_FRAME_REGNUM (ranges[n_ranges].beg))
638 != ranges[n_ranges].end - ranges[n_ranges].beg)
640 if (DWARF_FRAME_REGNUM (ranges[n_ranges].beg) >= size)
642 size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
643 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
644 build_int_2 (DWARF_FRAME_REGNUM
645 (ranges[n_ranges].end), 0)));
646 t = fold (build (COND_EXPR, integer_type_node, t2,
647 build_int_2 (ranges[n_ranges].size, 0), t));
650 return expand_expr (t, target, Pmode, 0);
653 /* Convert a DWARF call frame info. operation to its string name */
656 dwarf_cfi_name (cfi_opc)
657 register unsigned cfi_opc;
661 case DW_CFA_advance_loc:
662 return "DW_CFA_advance_loc";
664 return "DW_CFA_offset";
666 return "DW_CFA_restore";
670 return "DW_CFA_set_loc";
671 case DW_CFA_advance_loc1:
672 return "DW_CFA_advance_loc1";
673 case DW_CFA_advance_loc2:
674 return "DW_CFA_advance_loc2";
675 case DW_CFA_advance_loc4:
676 return "DW_CFA_advance_loc4";
677 case DW_CFA_offset_extended:
678 return "DW_CFA_offset_extended";
679 case DW_CFA_restore_extended:
680 return "DW_CFA_restore_extended";
681 case DW_CFA_undefined:
682 return "DW_CFA_undefined";
683 case DW_CFA_same_value:
684 return "DW_CFA_same_value";
685 case DW_CFA_register:
686 return "DW_CFA_register";
687 case DW_CFA_remember_state:
688 return "DW_CFA_remember_state";
689 case DW_CFA_restore_state:
690 return "DW_CFA_restore_state";
692 return "DW_CFA_def_cfa";
693 case DW_CFA_def_cfa_register:
694 return "DW_CFA_def_cfa_register";
695 case DW_CFA_def_cfa_offset:
696 return "DW_CFA_def_cfa_offset";
698 /* SGI/MIPS specific */
699 case DW_CFA_MIPS_advance_loc8:
700 return "DW_CFA_MIPS_advance_loc8";
703 case DW_CFA_GNU_window_save:
704 return "DW_CFA_GNU_window_save";
705 case DW_CFA_GNU_args_size:
706 return "DW_CFA_GNU_args_size";
709 return "DW_CFA_<unknown>";
713 /* Return a pointer to a newly allocated Call Frame Instruction. */
715 static inline dw_cfi_ref
718 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
720 cfi->dw_cfi_next = NULL;
721 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
722 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
727 /* Add a Call Frame Instruction to list of instructions. */
730 add_cfi (list_head, cfi)
731 register dw_cfi_ref *list_head;
732 register dw_cfi_ref cfi;
734 register dw_cfi_ref *p;
736 /* Find the end of the chain. */
737 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
743 /* Generate a new label for the CFI info to refer to. */
746 dwarf2out_cfi_label ()
748 static char label[20];
749 static unsigned long label_num = 0;
751 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
752 ASM_OUTPUT_LABEL (asm_out_file, label);
757 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
758 or to the CIE if LABEL is NULL. */
761 add_fde_cfi (label, cfi)
762 register char *label;
763 register dw_cfi_ref cfi;
767 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
770 label = dwarf2out_cfi_label ();
772 if (fde->dw_fde_current_label == NULL
773 || strcmp (label, fde->dw_fde_current_label) != 0)
775 register dw_cfi_ref xcfi;
777 fde->dw_fde_current_label = label = xstrdup (label);
779 /* Set the location counter to the new label. */
781 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
782 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
783 add_cfi (&fde->dw_fde_cfi, xcfi);
786 add_cfi (&fde->dw_fde_cfi, cfi);
790 add_cfi (&cie_cfi_head, cfi);
793 /* Subroutine of lookup_cfa. */
796 lookup_cfa_1 (cfi, regp, offsetp)
797 register dw_cfi_ref cfi;
798 register unsigned long *regp;
799 register long *offsetp;
801 switch (cfi->dw_cfi_opc)
803 case DW_CFA_def_cfa_offset:
804 *offsetp = cfi->dw_cfi_oprnd1.dw_cfi_offset;
806 case DW_CFA_def_cfa_register:
807 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
810 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
811 *offsetp = cfi->dw_cfi_oprnd2.dw_cfi_offset;
818 /* Find the previous value for the CFA. */
821 lookup_cfa (regp, offsetp)
822 register unsigned long *regp;
823 register long *offsetp;
825 register dw_cfi_ref cfi;
827 *regp = (unsigned long) -1;
830 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
831 lookup_cfa_1 (cfi, regp, offsetp);
833 if (fde_table_in_use)
835 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
836 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
837 lookup_cfa_1 (cfi, regp, offsetp);
841 /* The current rule for calculating the DWARF2 canonical frame address. */
842 static unsigned long cfa_reg;
843 static long cfa_offset;
845 /* The register used for saving registers to the stack, and its offset
847 static unsigned cfa_store_reg;
848 static long cfa_store_offset;
850 /* The running total of the size of arguments pushed onto the stack. */
851 static long args_size;
853 /* The last args_size we actually output. */
854 static long old_args_size;
856 /* Entry point to update the canonical frame address (CFA).
857 LABEL is passed to add_fde_cfi. The value of CFA is now to be
858 calculated from REG+OFFSET. */
861 dwarf2out_def_cfa (label, reg, offset)
862 register char *label;
863 register unsigned reg;
864 register long offset;
866 register dw_cfi_ref cfi;
867 unsigned long old_reg;
872 if (cfa_store_reg == reg)
873 cfa_store_offset = offset;
875 reg = DWARF_FRAME_REGNUM (reg);
876 lookup_cfa (&old_reg, &old_offset);
878 if (reg == old_reg && offset == old_offset)
885 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
886 cfi->dw_cfi_oprnd1.dw_cfi_offset = offset;
889 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
890 else if (offset == old_offset && old_reg != (unsigned long) -1)
892 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
893 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
899 cfi->dw_cfi_opc = DW_CFA_def_cfa;
900 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
901 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
904 add_fde_cfi (label, cfi);
907 /* Add the CFI for saving a register. REG is the CFA column number.
908 LABEL is passed to add_fde_cfi.
909 If SREG is -1, the register is saved at OFFSET from the CFA;
910 otherwise it is saved in SREG. */
913 reg_save (label, reg, sreg, offset)
914 register char * label;
915 register unsigned reg;
916 register unsigned sreg;
917 register long offset;
919 register dw_cfi_ref cfi = new_cfi ();
921 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
923 /* The following comparison is correct. -1 is used to indicate that
924 the value isn't a register number. */
925 if (sreg == (unsigned int) -1)
928 /* The register number won't fit in 6 bits, so we have to use
930 cfi->dw_cfi_opc = DW_CFA_offset_extended;
932 cfi->dw_cfi_opc = DW_CFA_offset;
934 offset /= DWARF_CIE_DATA_ALIGNMENT;
937 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
941 cfi->dw_cfi_opc = DW_CFA_register;
942 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
945 add_fde_cfi (label, cfi);
948 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
949 This CFI tells the unwinder that it needs to restore the window registers
950 from the previous frame's window save area.
952 ??? Perhaps we should note in the CIE where windows are saved (instead of
953 assuming 0(cfa)) and what registers are in the window. */
956 dwarf2out_window_save (label)
957 register char * label;
959 register dw_cfi_ref cfi = new_cfi ();
960 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
961 add_fde_cfi (label, cfi);
964 /* Add a CFI to update the running total of the size of arguments
965 pushed onto the stack. */
968 dwarf2out_args_size (label, size)
972 register dw_cfi_ref cfi;
974 if (size == old_args_size)
976 old_args_size = size;
979 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
980 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
981 add_fde_cfi (label, cfi);
984 /* Entry point for saving a register to the stack. REG is the GCC register
985 number. LABEL and OFFSET are passed to reg_save. */
988 dwarf2out_reg_save (label, reg, offset)
989 register char * label;
990 register unsigned reg;
991 register long offset;
993 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
996 /* Entry point for saving the return address in the stack.
997 LABEL and OFFSET are passed to reg_save. */
1000 dwarf2out_return_save (label, offset)
1001 register char * label;
1002 register long offset;
1004 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1007 /* Entry point for saving the return address in a register.
1008 LABEL and SREG are passed to reg_save. */
1011 dwarf2out_return_reg (label, sreg)
1012 register char * label;
1013 register unsigned sreg;
1015 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1018 /* Record the initial position of the return address. RTL is
1019 INCOMING_RETURN_ADDR_RTX. */
1022 initial_return_save (rtl)
1028 switch (GET_CODE (rtl))
1031 /* RA is in a register. */
1032 reg = reg_number (rtl);
1035 /* RA is on the stack. */
1036 rtl = XEXP (rtl, 0);
1037 switch (GET_CODE (rtl))
1040 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1045 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1047 offset = INTVAL (XEXP (rtl, 1));
1050 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1052 offset = -INTVAL (XEXP (rtl, 1));
1059 /* The return address is at some offset from any value we can
1060 actually load. For instance, on the SPARC it is in %i7+8. Just
1061 ignore the offset for now; it doesn't matter for unwinding frames. */
1062 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1064 initial_return_save (XEXP (rtl, 0));
1070 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa_offset);
1073 /* Check INSN to see if it looks like a push or a stack adjustment, and
1074 make a note of it if it does. EH uses this information to find out how
1075 much extra space it needs to pop off the stack. */
1078 dwarf2out_stack_adjust (insn)
1084 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1086 /* Extract the size of the args from the CALL rtx itself. */
1088 insn = PATTERN (insn);
1089 if (GET_CODE (insn) == PARALLEL)
1090 insn = XVECEXP (insn, 0, 0);
1091 if (GET_CODE (insn) == SET)
1092 insn = SET_SRC (insn);
1093 assert (GET_CODE (insn) == CALL);
1094 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1098 /* If only calls can throw, and we have a frame pointer,
1099 save up adjustments until we see the CALL_INSN. */
1100 else if (! asynchronous_exceptions
1101 && cfa_reg != STACK_POINTER_REGNUM)
1104 if (GET_CODE (insn) == BARRIER)
1106 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1107 the compiler will have already emitted a stack adjustment, but
1108 doesn't bother for calls to noreturn functions. */
1109 #ifdef STACK_GROWS_DOWNWARD
1110 offset = -args_size;
1115 else if (GET_CODE (PATTERN (insn)) == SET)
1120 insn = PATTERN (insn);
1121 src = SET_SRC (insn);
1122 dest = SET_DEST (insn);
1124 if (dest == stack_pointer_rtx)
1126 /* (set (reg sp) (plus (reg sp) (const_int))) */
1127 code = GET_CODE (src);
1128 if (! (code == PLUS || code == MINUS)
1129 || XEXP (src, 0) != stack_pointer_rtx
1130 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1133 offset = INTVAL (XEXP (src, 1));
1135 else if (GET_CODE (dest) == MEM)
1137 /* (set (mem (pre_dec (reg sp))) (foo)) */
1138 src = XEXP (dest, 0);
1139 code = GET_CODE (src);
1141 if (! (code == PRE_DEC || code == PRE_INC)
1142 || XEXP (src, 0) != stack_pointer_rtx)
1145 offset = GET_MODE_SIZE (GET_MODE (dest));
1150 if (code == PLUS || code == PRE_INC)
1159 if (cfa_reg == STACK_POINTER_REGNUM)
1160 cfa_offset += offset;
1162 #ifndef STACK_GROWS_DOWNWARD
1165 args_size += offset;
1169 label = dwarf2out_cfi_label ();
1170 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1171 dwarf2out_args_size (label, args_size);
1174 /* Record call frame debugging information for INSN, which either
1175 sets SP or FP (adjusting how we calculate the frame address) or saves a
1176 register to the stack. If INSN is NULL_RTX, initialize our state. */
1179 dwarf2out_frame_debug (insn)
1186 /* A temporary register used in adjusting SP or setting up the store_reg. */
1187 static unsigned cfa_temp_reg;
1188 static long cfa_temp_value;
1190 if (insn == NULL_RTX)
1192 /* Set up state for generating call frame debug info. */
1193 lookup_cfa (&cfa_reg, &cfa_offset);
1194 if (cfa_reg != DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1196 cfa_reg = STACK_POINTER_REGNUM;
1197 cfa_store_reg = cfa_reg;
1198 cfa_store_offset = cfa_offset;
1204 if (! RTX_FRAME_RELATED_P (insn))
1206 dwarf2out_stack_adjust (insn);
1210 label = dwarf2out_cfi_label ();
1212 insn = PATTERN (insn);
1213 /* Assume that in a PARALLEL prologue insn, only the first elt is
1214 significant. Currently this is true. */
1215 if (GET_CODE (insn) == PARALLEL)
1216 insn = XVECEXP (insn, 0, 0);
1217 if (GET_CODE (insn) != SET)
1220 src = SET_SRC (insn);
1221 dest = SET_DEST (insn);
1223 switch (GET_CODE (dest))
1226 /* Update the CFA rule wrt SP or FP. Make sure src is
1227 relative to the current CFA register. */
1228 switch (GET_CODE (src))
1230 /* Setting FP from SP. */
1232 if (cfa_reg != REGNO (src))
1234 if (REGNO (dest) != STACK_POINTER_REGNUM
1235 && !(frame_pointer_needed
1236 && REGNO (dest) == HARD_FRAME_POINTER_REGNUM))
1238 cfa_reg = REGNO (dest);
1243 if (dest == stack_pointer_rtx)
1246 switch (GET_CODE (XEXP (src, 1)))
1249 offset = INTVAL (XEXP (src, 1));
1252 if (REGNO (XEXP (src, 1)) != cfa_temp_reg)
1254 offset = cfa_temp_value;
1260 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1262 /* Restoring SP from FP in the epilogue. */
1263 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1265 cfa_reg = STACK_POINTER_REGNUM;
1267 else if (XEXP (src, 0) != stack_pointer_rtx)
1270 if (GET_CODE (src) == PLUS)
1272 if (cfa_reg == STACK_POINTER_REGNUM)
1273 cfa_offset += offset;
1274 if (cfa_store_reg == STACK_POINTER_REGNUM)
1275 cfa_store_offset += offset;
1277 else if (dest == hard_frame_pointer_rtx)
1279 /* Either setting the FP from an offset of the SP,
1280 or adjusting the FP */
1281 if (! frame_pointer_needed
1282 || REGNO (dest) != HARD_FRAME_POINTER_REGNUM)
1285 if (XEXP (src, 0) == stack_pointer_rtx
1286 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1288 if (cfa_reg != STACK_POINTER_REGNUM)
1290 offset = INTVAL (XEXP (src, 1));
1291 if (GET_CODE (src) == PLUS)
1293 cfa_offset += offset;
1294 cfa_reg = HARD_FRAME_POINTER_REGNUM;
1296 else if (XEXP (src, 0) == hard_frame_pointer_rtx
1297 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1299 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1301 offset = INTVAL (XEXP (src, 1));
1302 if (GET_CODE (src) == PLUS)
1304 cfa_offset += offset;
1312 if (GET_CODE (src) != PLUS
1313 || XEXP (src, 1) != stack_pointer_rtx)
1315 if (GET_CODE (XEXP (src, 0)) != REG
1316 || REGNO (XEXP (src, 0)) != cfa_temp_reg)
1318 if (cfa_reg != STACK_POINTER_REGNUM)
1320 cfa_store_reg = REGNO (dest);
1321 cfa_store_offset = cfa_offset - cfa_temp_value;
1326 cfa_temp_reg = REGNO (dest);
1327 cfa_temp_value = INTVAL (src);
1331 if (GET_CODE (XEXP (src, 0)) != REG
1332 || REGNO (XEXP (src, 0)) != cfa_temp_reg
1333 || REGNO (dest) != cfa_temp_reg
1334 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1336 cfa_temp_value |= INTVAL (XEXP (src, 1));
1342 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1346 /* Saving a register to the stack. Make sure dest is relative to the
1348 if (GET_CODE (src) != REG)
1350 switch (GET_CODE (XEXP (dest, 0)))
1355 offset = GET_MODE_SIZE (GET_MODE (dest));
1356 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1359 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1360 || cfa_store_reg != STACK_POINTER_REGNUM)
1362 cfa_store_offset += offset;
1363 if (cfa_reg == STACK_POINTER_REGNUM)
1364 cfa_offset = cfa_store_offset;
1366 offset = -cfa_store_offset;
1369 /* With an offset. */
1372 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1373 if (GET_CODE (src) == MINUS)
1376 if (cfa_store_reg != REGNO (XEXP (XEXP (dest, 0), 0)))
1378 offset -= cfa_store_offset;
1384 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1385 dwarf2out_reg_save (label, REGNO (src), offset);
1393 /* Return the size of an unsigned LEB128 quantity. */
1395 static inline unsigned long
1396 size_of_uleb128 (value)
1397 register unsigned long value;
1399 register unsigned long size = 0;
1400 register unsigned byte;
1404 byte = (value & 0x7f);
1413 /* Return the size of a signed LEB128 quantity. */
1415 static inline unsigned long
1416 size_of_sleb128 (value)
1417 register long value;
1419 register unsigned long size = 0;
1420 register unsigned byte;
1424 byte = (value & 0x7f);
1428 while (!(((value == 0) && ((byte & 0x40) == 0))
1429 || ((value == -1) && ((byte & 0x40) != 0))));
1434 /* Output an unsigned LEB128 quantity. */
1437 output_uleb128 (value)
1438 register unsigned long value;
1440 unsigned long save_value = value;
1442 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1445 register unsigned byte = (value & 0x7f);
1448 /* More bytes to follow. */
1451 fprintf (asm_out_file, "0x%x", byte);
1453 fprintf (asm_out_file, ",");
1458 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1461 /* Output an signed LEB128 quantity. */
1464 output_sleb128 (value)
1465 register long value;
1468 register unsigned byte;
1469 long save_value = value;
1471 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1474 byte = (value & 0x7f);
1475 /* arithmetic shift */
1477 more = !((((value == 0) && ((byte & 0x40) == 0))
1478 || ((value == -1) && ((byte & 0x40) != 0))));
1482 fprintf (asm_out_file, "0x%x", byte);
1484 fprintf (asm_out_file, ",");
1489 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1492 /* Output a Call Frame Information opcode and its operand(s). */
1495 output_cfi (cfi, fde)
1496 register dw_cfi_ref cfi;
1497 register dw_fde_ref fde;
1499 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1501 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1503 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1505 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1506 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1507 fputc ('\n', asm_out_file);
1510 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1512 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1514 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1516 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1517 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1519 fputc ('\n', asm_out_file);
1520 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1521 fputc ('\n', asm_out_file);
1523 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1525 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1527 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1529 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1530 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1532 fputc ('\n', asm_out_file);
1536 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1538 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1539 dwarf_cfi_name (cfi->dw_cfi_opc));
1541 fputc ('\n', asm_out_file);
1542 switch (cfi->dw_cfi_opc)
1544 case DW_CFA_set_loc:
1545 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1546 fputc ('\n', asm_out_file);
1548 case DW_CFA_advance_loc1:
1549 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1550 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1551 fde->dw_fde_current_label);
1552 fputc ('\n', asm_out_file);
1553 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1555 case DW_CFA_advance_loc2:
1556 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1557 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1558 fde->dw_fde_current_label);
1559 fputc ('\n', asm_out_file);
1560 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1562 case DW_CFA_advance_loc4:
1563 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1564 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1565 fde->dw_fde_current_label);
1566 fputc ('\n', asm_out_file);
1567 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1569 #ifdef MIPS_DEBUGGING_INFO
1570 case DW_CFA_MIPS_advance_loc8:
1571 /* TODO: not currently implemented. */
1575 case DW_CFA_offset_extended:
1576 case DW_CFA_def_cfa:
1577 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1578 fputc ('\n', asm_out_file);
1579 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1580 fputc ('\n', asm_out_file);
1582 case DW_CFA_restore_extended:
1583 case DW_CFA_undefined:
1584 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1585 fputc ('\n', asm_out_file);
1587 case DW_CFA_same_value:
1588 case DW_CFA_def_cfa_register:
1589 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1590 fputc ('\n', asm_out_file);
1592 case DW_CFA_register:
1593 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1594 fputc ('\n', asm_out_file);
1595 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1596 fputc ('\n', asm_out_file);
1598 case DW_CFA_def_cfa_offset:
1599 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1600 fputc ('\n', asm_out_file);
1602 case DW_CFA_GNU_window_save:
1604 case DW_CFA_GNU_args_size:
1605 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1606 fputc ('\n', asm_out_file);
1614 #if !defined (EH_FRAME_SECTION)
1615 #if defined (EH_FRAME_SECTION_ASM_OP)
1616 #define EH_FRAME_SECTION() eh_frame_section();
1618 #if defined (ASM_OUTPUT_SECTION_NAME)
1619 #define EH_FRAME_SECTION() \
1621 named_section (NULL_TREE, ".eh_frame", 0); \
1627 /* Output the call frame information used to used to record information
1628 that relates to calculating the frame pointer, and records the
1629 location of saved registers. */
1632 output_call_frame_info (for_eh)
1635 register unsigned long i;
1636 register dw_fde_ref fde;
1637 register dw_cfi_ref cfi;
1638 char l1[20], l2[20];
1639 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1643 /* Do we want to include a pointer to the exception table? */
1644 int eh_ptr = for_eh && exception_table_p ();
1646 fputc ('\n', asm_out_file);
1648 /* We're going to be generating comments, so turn on app. */
1654 #ifdef EH_FRAME_SECTION
1655 EH_FRAME_SECTION ();
1657 tree label = get_file_function_name ('F');
1660 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1661 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1662 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1664 assemble_label ("__FRAME_BEGIN__");
1667 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1669 /* Output the CIE. */
1670 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1671 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1672 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1673 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1675 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1677 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1680 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1682 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1685 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1688 fputc ('\n', asm_out_file);
1689 ASM_OUTPUT_LABEL (asm_out_file, l1);
1692 /* Now that the CIE pointer is PC-relative for EH,
1693 use 0 to identify the CIE. */
1694 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1696 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1699 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1701 fputc ('\n', asm_out_file);
1702 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1704 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1705 fputc ('\n', asm_out_file);
1708 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1710 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1712 fputc ('\n', asm_out_file);
1715 /* The CIE contains a pointer to the exception region info for the
1716 frame. Make the augmentation string three bytes (including the
1717 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1718 can't handle unaligned relocs. */
1721 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1722 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1726 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1728 fputc ('\n', asm_out_file);
1730 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1732 fprintf (asm_out_file, "\t%s pointer to exception region info",
1737 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1739 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1743 fputc ('\n', asm_out_file);
1746 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1748 fputc ('\n', asm_out_file);
1749 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1751 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1753 fputc ('\n', asm_out_file);
1754 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1756 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1758 fputc ('\n', asm_out_file);
1760 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1761 output_cfi (cfi, NULL);
1763 /* Pad the CIE out to an address sized boundary. */
1764 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1765 ASM_OUTPUT_LABEL (asm_out_file, l2);
1766 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1767 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1769 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1770 fputc ('\n', asm_out_file);
1773 /* Loop through all of the FDE's. */
1774 for (i = 0; i < fde_table_in_use; ++i)
1776 fde = &fde_table[i];
1778 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1779 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1780 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1781 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1783 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1785 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1788 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1790 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1793 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1794 fputc ('\n', asm_out_file);
1795 ASM_OUTPUT_LABEL (asm_out_file, l1);
1798 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l1, "__FRAME_BEGIN__");
1800 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1802 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1804 fputc ('\n', asm_out_file);
1805 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1807 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1809 fputc ('\n', asm_out_file);
1810 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1811 fde->dw_fde_end, fde->dw_fde_begin);
1813 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1815 fputc ('\n', asm_out_file);
1817 /* Loop through the Call Frame Instructions associated with
1819 fde->dw_fde_current_label = fde->dw_fde_begin;
1820 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1821 output_cfi (cfi, fde);
1823 /* Pad the FDE out to an address sized boundary. */
1824 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1825 ASM_OUTPUT_LABEL (asm_out_file, l2);
1826 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1827 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1829 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1830 fputc ('\n', asm_out_file);
1833 #ifndef EH_FRAME_SECTION
1836 /* Emit terminating zero for table. */
1837 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1838 fputc ('\n', asm_out_file);
1841 #ifdef MIPS_DEBUGGING_INFO
1842 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1843 get a value of 0. Putting .align 0 after the label fixes it. */
1844 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1847 /* Turn off app to make assembly quicker. */
1852 /* Output a marker (i.e. a label) for the beginning of a function, before
1856 dwarf2out_begin_prologue ()
1858 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1859 register dw_fde_ref fde;
1861 ++current_funcdef_number;
1863 function_section (current_function_decl);
1864 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1865 current_funcdef_number);
1866 ASM_OUTPUT_LABEL (asm_out_file, label);
1868 /* Expand the fde table if necessary. */
1869 if (fde_table_in_use == fde_table_allocated)
1871 fde_table_allocated += FDE_TABLE_INCREMENT;
1873 = (dw_fde_ref) xrealloc (fde_table,
1874 fde_table_allocated * sizeof (dw_fde_node));
1877 /* Record the FDE associated with this function. */
1878 current_funcdef_fde = fde_table_in_use;
1880 /* Add the new FDE at the end of the fde_table. */
1881 fde = &fde_table[fde_table_in_use++];
1882 fde->dw_fde_begin = xstrdup (label);
1883 fde->dw_fde_current_label = NULL;
1884 fde->dw_fde_end = NULL;
1885 fde->dw_fde_cfi = NULL;
1887 args_size = old_args_size = 0;
1890 /* Output a marker (i.e. a label) for the absolute end of the generated code
1891 for a function definition. This gets called *after* the epilogue code has
1895 dwarf2out_end_epilogue ()
1898 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1900 /* Output a label to mark the endpoint of the code generated for this
1902 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
1903 ASM_OUTPUT_LABEL (asm_out_file, label);
1904 fde = &fde_table[fde_table_in_use - 1];
1905 fde->dw_fde_end = xstrdup (label);
1909 dwarf2out_frame_init ()
1911 /* Allocate the initial hunk of the fde_table. */
1913 = (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1914 bzero ((char *) fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1915 fde_table_allocated = FDE_TABLE_INCREMENT;
1916 fde_table_in_use = 0;
1918 /* Generate the CFA instructions common to all FDE's. Do it now for the
1919 sake of lookup_cfa. */
1921 #ifdef DWARF2_UNWIND_INFO
1922 /* On entry, the Canonical Frame Address is at SP. */
1923 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
1924 initial_return_save (INCOMING_RETURN_ADDR_RTX);
1929 dwarf2out_frame_finish ()
1931 /* Output call frame information. */
1932 #ifdef MIPS_DEBUGGING_INFO
1933 if (write_symbols == DWARF2_DEBUG)
1934 output_call_frame_info (0);
1935 if (flag_exceptions && ! exceptions_via_longjmp)
1936 output_call_frame_info (1);
1938 if (write_symbols == DWARF2_DEBUG
1939 || (flag_exceptions && ! exceptions_via_longjmp))
1940 output_call_frame_info (1);
1944 #endif /* .debug_frame support */
1946 /* And now, the support for symbolic debugging information. */
1947 #ifdef DWARF2_DEBUGGING_INFO
1949 extern char *getpwd ();
1951 /* NOTE: In the comments in this file, many references are made to
1952 "Debugging Information Entries". This term is abbreviated as `DIE'
1953 throughout the remainder of this file. */
1955 /* An internal representation of the DWARF output is built, and then
1956 walked to generate the DWARF debugging info. The walk of the internal
1957 representation is done after the entire program has been compiled.
1958 The types below are used to describe the internal representation. */
1960 /* Each DIE may have a series of attribute/value pairs. Values
1961 can take on several forms. The forms that are used in this
1962 implementation are listed below. */
1969 dw_val_class_unsigned_const,
1970 dw_val_class_long_long,
1973 dw_val_class_die_ref,
1974 dw_val_class_fde_ref,
1975 dw_val_class_lbl_id,
1976 dw_val_class_section_offset,
1981 /* Various DIE's use offsets relative to the beginning of the
1982 .debug_info section to refer to each other. */
1984 typedef long int dw_offset;
1986 /* Define typedefs here to avoid circular dependencies. */
1988 typedef struct die_struct *dw_die_ref;
1989 typedef struct dw_attr_struct *dw_attr_ref;
1990 typedef struct dw_val_struct *dw_val_ref;
1991 typedef struct dw_line_info_struct *dw_line_info_ref;
1992 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
1993 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
1994 typedef struct pubname_struct *pubname_ref;
1995 typedef dw_die_ref *arange_ref;
1997 /* Describe a double word constant value. */
1999 typedef struct dw_long_long_struct
2006 /* Describe a floating point constant value. */
2008 typedef struct dw_fp_struct
2015 /* Each entry in the line_info_table maintains the file and
2016 line number associated with the label generated for that
2017 entry. The label gives the PC value associated with
2018 the line number entry. */
2020 typedef struct dw_line_info_struct
2022 unsigned long dw_file_num;
2023 unsigned long dw_line_num;
2027 /* Line information for functions in separate sections; each one gets its
2029 typedef struct dw_separate_line_info_struct
2031 unsigned long dw_file_num;
2032 unsigned long dw_line_num;
2033 unsigned long function;
2035 dw_separate_line_info_entry;
2037 /* The dw_val_node describes an attribute's value, as it is
2038 represented internally. */
2040 typedef struct dw_val_struct
2042 dw_val_class val_class;
2046 dw_loc_descr_ref val_loc;
2048 long unsigned val_unsigned;
2049 dw_long_long_const val_long_long;
2050 dw_float_const val_float;
2051 dw_die_ref val_die_ref;
2052 unsigned val_fde_index;
2056 unsigned char val_flag;
2062 /* Locations in memory are described using a sequence of stack machine
2065 typedef struct dw_loc_descr_struct
2067 dw_loc_descr_ref dw_loc_next;
2068 enum dwarf_location_atom dw_loc_opc;
2069 dw_val_node dw_loc_oprnd1;
2070 dw_val_node dw_loc_oprnd2;
2074 /* Each DIE attribute has a field specifying the attribute kind,
2075 a link to the next attribute in the chain, and an attribute value.
2076 Attributes are typically linked below the DIE they modify. */
2078 typedef struct dw_attr_struct
2080 enum dwarf_attribute dw_attr;
2081 dw_attr_ref dw_attr_next;
2082 dw_val_node dw_attr_val;
2086 /* The Debugging Information Entry (DIE) structure */
2088 typedef struct die_struct
2090 enum dwarf_tag die_tag;
2091 dw_attr_ref die_attr;
2092 dw_attr_ref die_attr_last;
2093 dw_die_ref die_parent;
2094 dw_die_ref die_child;
2095 dw_die_ref die_child_last;
2097 dw_offset die_offset;
2098 unsigned long die_abbrev;
2102 /* The pubname structure */
2104 typedef struct pubname_struct
2111 /* The limbo die list structure. */
2112 typedef struct limbo_die_struct
2115 struct limbo_die_struct *next;
2119 /* How to start an assembler comment. */
2120 #ifndef ASM_COMMENT_START
2121 #define ASM_COMMENT_START ";#"
2124 /* Define a macro which returns non-zero for a TYPE_DECL which was
2125 implicitly generated for a tagged type.
2127 Note that unlike the gcc front end (which generates a NULL named
2128 TYPE_DECL node for each complete tagged type, each array type, and
2129 each function type node created) the g++ front end generates a
2130 _named_ TYPE_DECL node for each tagged type node created.
2131 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2132 generate a DW_TAG_typedef DIE for them. */
2134 #define TYPE_DECL_IS_STUB(decl) \
2135 (DECL_NAME (decl) == NULL_TREE \
2136 || (DECL_ARTIFICIAL (decl) \
2137 && is_tagged_type (TREE_TYPE (decl)) \
2138 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2139 /* This is necessary for stub decls that \
2140 appear in nested inline functions. */ \
2141 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2142 && (decl_ultimate_origin (decl) \
2143 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2145 /* Information concerning the compilation unit's programming
2146 language, and compiler version. */
2148 extern int flag_traditional;
2149 extern char *version_string;
2150 extern char *language_string;
2152 /* Fixed size portion of the DWARF compilation unit header. */
2153 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2155 /* Fixed size portion of debugging line information prolog. */
2156 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2158 /* Fixed size portion of public names info. */
2159 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2161 /* Fixed size portion of the address range info. */
2162 #define DWARF_ARANGES_HEADER_SIZE \
2163 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2165 /* Define the architecture-dependent minimum instruction length (in bytes).
2166 In this implementation of DWARF, this field is used for information
2167 purposes only. Since GCC generates assembly language, we have
2168 no a priori knowledge of how many instruction bytes are generated
2169 for each source line, and therefore can use only the DW_LNE_set_address
2170 and DW_LNS_fixed_advance_pc line information commands. */
2172 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2173 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2176 /* Minimum line offset in a special line info. opcode.
2177 This value was chosen to give a reasonable range of values. */
2178 #define DWARF_LINE_BASE -10
2180 /* First special line opcde - leave room for the standard opcodes. */
2181 #define DWARF_LINE_OPCODE_BASE 10
2183 /* Range of line offsets in a special line info. opcode. */
2184 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2186 /* Flag that indicates the initial value of the is_stmt_start flag.
2187 In the present implementation, we do not mark any lines as
2188 the beginning of a source statement, because that information
2189 is not made available by the GCC front-end. */
2190 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2192 /* This location is used by calc_die_sizes() to keep track
2193 the offset of each DIE within the .debug_info section. */
2194 static unsigned long next_die_offset;
2196 /* Record the root of the DIE's built for the current compilation unit. */
2197 static dw_die_ref comp_unit_die;
2199 /* A list of DIEs with a NULL parent waiting to be relocated. */
2200 static limbo_die_node *limbo_die_list = 0;
2202 /* Pointer to an array of filenames referenced by this compilation unit. */
2203 static char **file_table;
2205 /* Total number of entries in the table (i.e. array) pointed to by
2206 `file_table'. This is the *total* and includes both used and unused
2208 static unsigned file_table_allocated;
2210 /* Number of entries in the file_table which are actually in use. */
2211 static unsigned file_table_in_use;
2213 /* Size (in elements) of increments by which we may expand the filename
2215 #define FILE_TABLE_INCREMENT 64
2217 /* Local pointer to the name of the main input file. Initialized in
2219 static char *primary_filename;
2221 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2222 which their beginnings are encountered. We output Dwarf debugging info
2223 that refers to the beginnings and ends of the ranges of code for each
2224 lexical block. The labels themselves are generated in final.c, which
2225 assigns numbers to the blocks in the same way. */
2226 static unsigned next_block_number = 2;
2228 /* A pointer to the base of a table of references to DIE's that describe
2229 declarations. The table is indexed by DECL_UID() which is a unique
2230 number identifying each decl. */
2231 static dw_die_ref *decl_die_table;
2233 /* Number of elements currently allocated for the decl_die_table. */
2234 static unsigned decl_die_table_allocated;
2236 /* Number of elements in decl_die_table currently in use. */
2237 static unsigned decl_die_table_in_use;
2239 /* Size (in elements) of increments by which we may expand the
2241 #define DECL_DIE_TABLE_INCREMENT 256
2243 /* Structure used for the decl_scope table. scope is the current declaration
2244 scope, and previous is the entry that is the parent of this scope. This
2245 is usually but not always the immediately preceeding entry. */
2247 typedef struct decl_scope_struct
2254 /* A pointer to the base of a table of references to declaration
2255 scopes. This table is a display which tracks the nesting
2256 of declaration scopes at the current scope and containing
2257 scopes. This table is used to find the proper place to
2258 define type declaration DIE's. */
2259 static decl_scope_node *decl_scope_table;
2261 /* Number of elements currently allocated for the decl_scope_table. */
2262 static int decl_scope_table_allocated;
2264 /* Current level of nesting of declaration scopes. */
2265 static int decl_scope_depth;
2267 /* Size (in elements) of increments by which we may expand the
2268 decl_scope_table. */
2269 #define DECL_SCOPE_TABLE_INCREMENT 64
2271 /* A pointer to the base of a list of references to DIE's that
2272 are uniquely identified by their tag, presence/absence of
2273 children DIE's, and list of attribute/value pairs. */
2274 static dw_die_ref *abbrev_die_table;
2276 /* Number of elements currently allocated for abbrev_die_table. */
2277 static unsigned abbrev_die_table_allocated;
2279 /* Number of elements in type_die_table currently in use. */
2280 static unsigned abbrev_die_table_in_use;
2282 /* Size (in elements) of increments by which we may expand the
2283 abbrev_die_table. */
2284 #define ABBREV_DIE_TABLE_INCREMENT 256
2286 /* A pointer to the base of a table that contains line information
2287 for each source code line in .text in the compilation unit. */
2288 static dw_line_info_ref line_info_table;
2290 /* Number of elements currently allocated for line_info_table. */
2291 static unsigned line_info_table_allocated;
2293 /* Number of elements in separate_line_info_table currently in use. */
2294 static unsigned separate_line_info_table_in_use;
2296 /* A pointer to the base of a table that contains line information
2297 for each source code line outside of .text in the compilation unit. */
2298 static dw_separate_line_info_ref separate_line_info_table;
2300 /* Number of elements currently allocated for separate_line_info_table. */
2301 static unsigned separate_line_info_table_allocated;
2303 /* Number of elements in line_info_table currently in use. */
2304 static unsigned line_info_table_in_use;
2306 /* Size (in elements) of increments by which we may expand the
2308 #define LINE_INFO_TABLE_INCREMENT 1024
2310 /* A pointer to the base of a table that contains a list of publicly
2311 accessible names. */
2312 static pubname_ref pubname_table;
2314 /* Number of elements currently allocated for pubname_table. */
2315 static unsigned pubname_table_allocated;
2317 /* Number of elements in pubname_table currently in use. */
2318 static unsigned pubname_table_in_use;
2320 /* Size (in elements) of increments by which we may expand the
2322 #define PUBNAME_TABLE_INCREMENT 64
2324 /* A pointer to the base of a table that contains a list of publicly
2325 accessible names. */
2326 static arange_ref arange_table;
2328 /* Number of elements currently allocated for arange_table. */
2329 static unsigned arange_table_allocated;
2331 /* Number of elements in arange_table currently in use. */
2332 static unsigned arange_table_in_use;
2334 /* Size (in elements) of increments by which we may expand the
2336 #define ARANGE_TABLE_INCREMENT 64
2338 /* A pointer to the base of a list of pending types which we haven't
2339 generated DIEs for yet, but which we will have to come back to
2342 static tree *pending_types_list;
2344 /* Number of elements currently allocated for the pending_types_list. */
2345 static unsigned pending_types_allocated;
2347 /* Number of elements of pending_types_list currently in use. */
2348 static unsigned pending_types;
2350 /* Size (in elements) of increments by which we may expand the pending
2351 types list. Actually, a single hunk of space of this size should
2352 be enough for most typical programs. */
2353 #define PENDING_TYPES_INCREMENT 64
2355 /* Record whether the function being analyzed contains inlined functions. */
2356 static int current_function_has_inlines;
2357 #if 0 && defined (MIPS_DEBUGGING_INFO)
2358 static int comp_unit_has_inlines;
2361 /* A pointer to the ..._DECL node which we have most recently been working
2362 on. We keep this around just in case something about it looks screwy and
2363 we want to tell the user what the source coordinates for the actual
2365 static tree dwarf_last_decl;
2367 /* Forward declarations for functions defined in this file. */
2369 static void addr_const_to_string PROTO((char *, rtx));
2370 static char *addr_to_string PROTO((rtx));
2371 static int is_pseudo_reg PROTO((rtx));
2372 static tree type_main_variant PROTO((tree));
2373 static int is_tagged_type PROTO((tree));
2374 static char *dwarf_tag_name PROTO((unsigned));
2375 static char *dwarf_attr_name PROTO((unsigned));
2376 static char *dwarf_form_name PROTO((unsigned));
2377 static char *dwarf_stack_op_name PROTO((unsigned));
2379 static char *dwarf_type_encoding_name PROTO((unsigned));
2381 static tree decl_ultimate_origin PROTO((tree));
2382 static tree block_ultimate_origin PROTO((tree));
2383 static tree decl_class_context PROTO((tree));
2384 static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
2385 static void add_AT_flag PROTO((dw_die_ref,
2386 enum dwarf_attribute,
2388 static void add_AT_int PROTO((dw_die_ref,
2389 enum dwarf_attribute, long));
2390 static void add_AT_unsigned PROTO((dw_die_ref,
2391 enum dwarf_attribute,
2393 static void add_AT_long_long PROTO((dw_die_ref,
2394 enum dwarf_attribute,
2395 unsigned long, unsigned long));
2396 static void add_AT_float PROTO((dw_die_ref,
2397 enum dwarf_attribute,
2399 static void add_AT_string PROTO((dw_die_ref,
2400 enum dwarf_attribute, char *));
2401 static void add_AT_die_ref PROTO((dw_die_ref,
2402 enum dwarf_attribute,
2404 static void add_AT_fde_ref PROTO((dw_die_ref,
2405 enum dwarf_attribute,
2407 static void add_AT_loc PROTO((dw_die_ref,
2408 enum dwarf_attribute,
2410 static void add_AT_addr PROTO((dw_die_ref,
2411 enum dwarf_attribute, char *));
2412 static void add_AT_lbl_id PROTO((dw_die_ref,
2413 enum dwarf_attribute, char *));
2414 static void add_AT_section_offset PROTO((dw_die_ref,
2415 enum dwarf_attribute, char *));
2416 static int is_extern_subr_die PROTO((dw_die_ref));
2417 static dw_attr_ref get_AT PROTO((dw_die_ref,
2418 enum dwarf_attribute));
2419 static char *get_AT_low_pc PROTO((dw_die_ref));
2420 static char *get_AT_hi_pc PROTO((dw_die_ref));
2421 static char *get_AT_string PROTO((dw_die_ref,
2422 enum dwarf_attribute));
2423 static int get_AT_flag PROTO((dw_die_ref,
2424 enum dwarf_attribute));
2425 static unsigned get_AT_unsigned PROTO((dw_die_ref,
2426 enum dwarf_attribute));
2427 static int is_c_family PROTO((void));
2428 static int is_fortran PROTO((void));
2429 static void remove_AT PROTO((dw_die_ref,
2430 enum dwarf_attribute));
2431 static void remove_children PROTO((dw_die_ref));
2432 static void add_child_die PROTO((dw_die_ref, dw_die_ref));
2433 static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
2434 static dw_die_ref lookup_type_die PROTO((tree));
2435 static void equate_type_number_to_die PROTO((tree, dw_die_ref));
2436 static dw_die_ref lookup_decl_die PROTO((tree));
2437 static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
2438 static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
2439 unsigned long, unsigned long));
2440 static void add_loc_descr PROTO((dw_loc_descr_ref *,
2442 static void print_spaces PROTO((FILE *));
2443 static void print_die PROTO((dw_die_ref, FILE *));
2444 static void print_dwarf_line_table PROTO((FILE *));
2445 static void add_sibling_attributes PROTO((dw_die_ref));
2446 static void build_abbrev_table PROTO((dw_die_ref));
2447 static unsigned long size_of_string PROTO((char *));
2448 static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
2449 static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
2450 static int constant_size PROTO((long unsigned));
2451 static unsigned long size_of_die PROTO((dw_die_ref));
2452 static void calc_die_sizes PROTO((dw_die_ref));
2453 static unsigned long size_of_line_prolog PROTO((void));
2454 static unsigned long size_of_line_info PROTO((void));
2455 static unsigned long size_of_pubnames PROTO((void));
2456 static unsigned long size_of_aranges PROTO((void));
2457 static enum dwarf_form value_format PROTO((dw_val_ref));
2458 static void output_value_format PROTO((dw_val_ref));
2459 static void output_abbrev_section PROTO((void));
2460 static void output_loc_operands PROTO((dw_loc_descr_ref));
2461 static unsigned long sibling_offset PROTO((dw_die_ref));
2462 static void output_die PROTO((dw_die_ref));
2463 static void output_compilation_unit_header PROTO((void));
2464 static char *dwarf2_name PROTO((tree, int));
2465 static void add_pubname PROTO((tree, dw_die_ref));
2466 static void output_pubnames PROTO((void));
2467 static void add_arange PROTO((tree, dw_die_ref));
2468 static void output_aranges PROTO((void));
2469 static void output_line_info PROTO((void));
2470 static int is_body_block PROTO((tree));
2471 static dw_die_ref base_type_die PROTO((tree));
2472 static tree root_type PROTO((tree));
2473 static int is_base_type PROTO((tree));
2474 static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
2475 static int type_is_enum PROTO((tree));
2476 static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
2477 static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
2478 static int is_based_loc PROTO((rtx));
2479 static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx));
2480 static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
2481 static dw_loc_descr_ref loc_descriptor PROTO((rtx));
2482 static unsigned ceiling PROTO((unsigned, unsigned));
2483 static tree field_type PROTO((tree));
2484 static unsigned simple_type_align_in_bits PROTO((tree));
2485 static unsigned simple_type_size_in_bits PROTO((tree));
2486 static unsigned field_byte_offset PROTO((tree));
2487 static void add_AT_location_description PROTO((dw_die_ref,
2488 enum dwarf_attribute, rtx));
2489 static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
2490 static void add_const_value_attribute PROTO((dw_die_ref, rtx));
2491 static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
2492 static void add_name_attribute PROTO((dw_die_ref, char *));
2493 static void add_bound_info PROTO((dw_die_ref,
2494 enum dwarf_attribute, tree));
2495 static void add_subscript_info PROTO((dw_die_ref, tree));
2496 static void add_byte_size_attribute PROTO((dw_die_ref, tree));
2497 static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
2498 static void add_bit_size_attribute PROTO((dw_die_ref, tree));
2499 static void add_prototyped_attribute PROTO((dw_die_ref, tree));
2500 static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
2501 static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
2502 static void add_src_coords_attributes PROTO((dw_die_ref, tree));
2503 static void add_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
2504 static void push_decl_scope PROTO((tree));
2505 static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
2506 static void pop_decl_scope PROTO((void));
2507 static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
2509 static char *type_tag PROTO((tree));
2510 static tree member_declared_type PROTO((tree));
2512 static char *decl_start_label PROTO((tree));
2514 static void gen_array_type_die PROTO((tree, dw_die_ref));
2515 static void gen_set_type_die PROTO((tree, dw_die_ref));
2517 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2519 static void pend_type PROTO((tree));
2520 static void output_pending_types_for_scope PROTO((dw_die_ref));
2521 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2522 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2523 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2524 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2525 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2526 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2527 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2528 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2529 static void gen_variable_die PROTO((tree, dw_die_ref));
2530 static void gen_label_die PROTO((tree, dw_die_ref));
2531 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2532 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2533 static void gen_field_die PROTO((tree, dw_die_ref));
2534 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2535 static void gen_compile_unit_die PROTO((char *));
2536 static void gen_string_type_die PROTO((tree, dw_die_ref));
2537 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2538 static void gen_member_die PROTO((tree, dw_die_ref));
2539 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2540 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2541 static void gen_typedef_die PROTO((tree, dw_die_ref));
2542 static void gen_type_die PROTO((tree, dw_die_ref));
2543 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2544 static void gen_block_die PROTO((tree, dw_die_ref, int));
2545 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2546 static int is_redundant_typedef PROTO((tree));
2547 static void gen_decl_die PROTO((tree, dw_die_ref));
2548 static unsigned lookup_filename PROTO((char *));
2550 /* Section names used to hold DWARF debugging information. */
2551 #ifndef DEBUG_INFO_SECTION
2552 #define DEBUG_INFO_SECTION ".debug_info"
2554 #ifndef ABBREV_SECTION
2555 #define ABBREV_SECTION ".debug_abbrev"
2557 #ifndef ARANGES_SECTION
2558 #define ARANGES_SECTION ".debug_aranges"
2560 #ifndef DW_MACINFO_SECTION
2561 #define DW_MACINFO_SECTION ".debug_macinfo"
2563 #ifndef DEBUG_LINE_SECTION
2564 #define DEBUG_LINE_SECTION ".debug_line"
2567 #define LOC_SECTION ".debug_loc"
2569 #ifndef PUBNAMES_SECTION
2570 #define PUBNAMES_SECTION ".debug_pubnames"
2573 #define STR_SECTION ".debug_str"
2576 /* Standard ELF section names for compiled code and data. */
2577 #ifndef TEXT_SECTION
2578 #define TEXT_SECTION ".text"
2580 #ifndef DATA_SECTION
2581 #define DATA_SECTION ".data"
2584 #define BSS_SECTION ".bss"
2588 /* Definitions of defaults for formats and names of various special
2589 (artificial) labels which may be generated within this file (when the -g
2590 options is used and DWARF_DEBUGGING_INFO is in effect.
2591 If necessary, these may be overridden from within the tm.h file, but
2592 typically, overriding these defaults is unnecessary. */
2594 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2596 #ifndef TEXT_END_LABEL
2597 #define TEXT_END_LABEL "Letext"
2599 #ifndef DATA_END_LABEL
2600 #define DATA_END_LABEL "Ledata"
2602 #ifndef BSS_END_LABEL
2603 #define BSS_END_LABEL "Lebss"
2605 #ifndef INSN_LABEL_FMT
2606 #define INSN_LABEL_FMT "LI%u_"
2608 #ifndef BLOCK_BEGIN_LABEL
2609 #define BLOCK_BEGIN_LABEL "LBB"
2611 #ifndef BLOCK_END_LABEL
2612 #define BLOCK_END_LABEL "LBE"
2614 #ifndef BODY_BEGIN_LABEL
2615 #define BODY_BEGIN_LABEL "Lbb"
2617 #ifndef BODY_END_LABEL
2618 #define BODY_END_LABEL "Lbe"
2620 #ifndef LINE_CODE_LABEL
2621 #define LINE_CODE_LABEL "LM"
2623 #ifndef SEPARATE_LINE_CODE_LABEL
2624 #define SEPARATE_LINE_CODE_LABEL "LSM"
2627 /* Convert a reference to the assembler name of a C-level name. This
2628 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2629 a string rather than writing to a file. */
2630 #ifndef ASM_NAME_TO_STRING
2631 #define ASM_NAME_TO_STRING(STR, NAME) \
2633 if ((NAME)[0] == '*') \
2634 strcpy (STR, NAME+1); \
2636 strcpy (STR, NAME); \
2641 /* Convert an integer constant expression into assembler syntax. Addition
2642 and subtraction are the only arithmetic that may appear in these
2643 expressions. This is an adaptation of output_addr_const in final.c.
2644 Here, the target of the conversion is a string buffer. We can't use
2645 output_addr_const directly, because it writes to a file. */
2648 addr_const_to_string (str, x)
2657 switch (GET_CODE (x))
2667 ASM_NAME_TO_STRING (buf1, XSTR (x, 0));
2672 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2673 ASM_NAME_TO_STRING (buf2, buf1);
2678 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2679 ASM_NAME_TO_STRING (buf2, buf1);
2684 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2689 /* This used to output parentheses around the expression, but that does
2690 not work on the 386 (either ATT or BSD assembler). */
2691 addr_const_to_string (buf1, XEXP (x, 0));
2696 if (GET_MODE (x) == VOIDmode)
2698 /* We can use %d if the number is one word and positive. */
2699 if (CONST_DOUBLE_HIGH (x))
2700 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2701 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2702 else if (CONST_DOUBLE_LOW (x) < 0)
2703 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2705 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2706 CONST_DOUBLE_LOW (x));
2710 /* We can't handle floating point constants; PRINT_OPERAND must
2712 output_operand_lossage ("floating constant misused");
2716 /* Some assemblers need integer constants to appear last (eg masm). */
2717 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2719 addr_const_to_string (buf1, XEXP (x, 1));
2721 if (INTVAL (XEXP (x, 0)) >= 0)
2724 addr_const_to_string (buf1, XEXP (x, 0));
2729 addr_const_to_string (buf1, XEXP (x, 0));
2731 if (INTVAL (XEXP (x, 1)) >= 0)
2734 addr_const_to_string (buf1, XEXP (x, 1));
2740 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2741 can't handle that. */
2742 x = simplify_subtraction (x);
2743 if (GET_CODE (x) != MINUS)
2746 addr_const_to_string (buf1, XEXP (x, 0));
2749 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2750 && INTVAL (XEXP (x, 1)) < 0)
2752 strcat (str, ASM_OPEN_PAREN);
2753 addr_const_to_string (buf1, XEXP (x, 1));
2755 strcat (str, ASM_CLOSE_PAREN);
2759 addr_const_to_string (buf1, XEXP (x, 1));
2766 addr_const_to_string (buf1, XEXP (x, 0));
2771 output_operand_lossage ("invalid expression as operand");
2775 /* Convert an address constant to a string, and return a pointer to
2776 a copy of the result, located on the heap. */
2783 addr_const_to_string (buf, x);
2784 return xstrdup (buf);
2787 /* Test if rtl node points to a pseudo register. */
2793 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2794 || ((GET_CODE (rtl) == SUBREG)
2795 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2798 /* Return a reference to a type, with its const and volatile qualifiers
2802 type_main_variant (type)
2805 type = TYPE_MAIN_VARIANT (type);
2807 /* There really should be only one main variant among any group of variants
2808 of a given type (and all of the MAIN_VARIANT values for all members of
2809 the group should point to that one type) but sometimes the C front-end
2810 messes this up for array types, so we work around that bug here. */
2812 if (TREE_CODE (type) == ARRAY_TYPE)
2813 while (type != TYPE_MAIN_VARIANT (type))
2814 type = TYPE_MAIN_VARIANT (type);
2819 /* Return non-zero if the given type node represents a tagged type. */
2822 is_tagged_type (type)
2825 register enum tree_code code = TREE_CODE (type);
2827 return (code == RECORD_TYPE || code == UNION_TYPE
2828 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2831 /* Convert a DIE tag into its string name. */
2834 dwarf_tag_name (tag)
2835 register unsigned tag;
2839 case DW_TAG_padding:
2840 return "DW_TAG_padding";
2841 case DW_TAG_array_type:
2842 return "DW_TAG_array_type";
2843 case DW_TAG_class_type:
2844 return "DW_TAG_class_type";
2845 case DW_TAG_entry_point:
2846 return "DW_TAG_entry_point";
2847 case DW_TAG_enumeration_type:
2848 return "DW_TAG_enumeration_type";
2849 case DW_TAG_formal_parameter:
2850 return "DW_TAG_formal_parameter";
2851 case DW_TAG_imported_declaration:
2852 return "DW_TAG_imported_declaration";
2854 return "DW_TAG_label";
2855 case DW_TAG_lexical_block:
2856 return "DW_TAG_lexical_block";
2858 return "DW_TAG_member";
2859 case DW_TAG_pointer_type:
2860 return "DW_TAG_pointer_type";
2861 case DW_TAG_reference_type:
2862 return "DW_TAG_reference_type";
2863 case DW_TAG_compile_unit:
2864 return "DW_TAG_compile_unit";
2865 case DW_TAG_string_type:
2866 return "DW_TAG_string_type";
2867 case DW_TAG_structure_type:
2868 return "DW_TAG_structure_type";
2869 case DW_TAG_subroutine_type:
2870 return "DW_TAG_subroutine_type";
2871 case DW_TAG_typedef:
2872 return "DW_TAG_typedef";
2873 case DW_TAG_union_type:
2874 return "DW_TAG_union_type";
2875 case DW_TAG_unspecified_parameters:
2876 return "DW_TAG_unspecified_parameters";
2877 case DW_TAG_variant:
2878 return "DW_TAG_variant";
2879 case DW_TAG_common_block:
2880 return "DW_TAG_common_block";
2881 case DW_TAG_common_inclusion:
2882 return "DW_TAG_common_inclusion";
2883 case DW_TAG_inheritance:
2884 return "DW_TAG_inheritance";
2885 case DW_TAG_inlined_subroutine:
2886 return "DW_TAG_inlined_subroutine";
2888 return "DW_TAG_module";
2889 case DW_TAG_ptr_to_member_type:
2890 return "DW_TAG_ptr_to_member_type";
2891 case DW_TAG_set_type:
2892 return "DW_TAG_set_type";
2893 case DW_TAG_subrange_type:
2894 return "DW_TAG_subrange_type";
2895 case DW_TAG_with_stmt:
2896 return "DW_TAG_with_stmt";
2897 case DW_TAG_access_declaration:
2898 return "DW_TAG_access_declaration";
2899 case DW_TAG_base_type:
2900 return "DW_TAG_base_type";
2901 case DW_TAG_catch_block:
2902 return "DW_TAG_catch_block";
2903 case DW_TAG_const_type:
2904 return "DW_TAG_const_type";
2905 case DW_TAG_constant:
2906 return "DW_TAG_constant";
2907 case DW_TAG_enumerator:
2908 return "DW_TAG_enumerator";
2909 case DW_TAG_file_type:
2910 return "DW_TAG_file_type";
2912 return "DW_TAG_friend";
2913 case DW_TAG_namelist:
2914 return "DW_TAG_namelist";
2915 case DW_TAG_namelist_item:
2916 return "DW_TAG_namelist_item";
2917 case DW_TAG_packed_type:
2918 return "DW_TAG_packed_type";
2919 case DW_TAG_subprogram:
2920 return "DW_TAG_subprogram";
2921 case DW_TAG_template_type_param:
2922 return "DW_TAG_template_type_param";
2923 case DW_TAG_template_value_param:
2924 return "DW_TAG_template_value_param";
2925 case DW_TAG_thrown_type:
2926 return "DW_TAG_thrown_type";
2927 case DW_TAG_try_block:
2928 return "DW_TAG_try_block";
2929 case DW_TAG_variant_part:
2930 return "DW_TAG_variant_part";
2931 case DW_TAG_variable:
2932 return "DW_TAG_variable";
2933 case DW_TAG_volatile_type:
2934 return "DW_TAG_volatile_type";
2935 case DW_TAG_MIPS_loop:
2936 return "DW_TAG_MIPS_loop";
2937 case DW_TAG_format_label:
2938 return "DW_TAG_format_label";
2939 case DW_TAG_function_template:
2940 return "DW_TAG_function_template";
2941 case DW_TAG_class_template:
2942 return "DW_TAG_class_template";
2944 return "DW_TAG_<unknown>";
2948 /* Convert a DWARF attribute code into its string name. */
2951 dwarf_attr_name (attr)
2952 register unsigned attr;
2957 return "DW_AT_sibling";
2958 case DW_AT_location:
2959 return "DW_AT_location";
2961 return "DW_AT_name";
2962 case DW_AT_ordering:
2963 return "DW_AT_ordering";
2964 case DW_AT_subscr_data:
2965 return "DW_AT_subscr_data";
2966 case DW_AT_byte_size:
2967 return "DW_AT_byte_size";
2968 case DW_AT_bit_offset:
2969 return "DW_AT_bit_offset";
2970 case DW_AT_bit_size:
2971 return "DW_AT_bit_size";
2972 case DW_AT_element_list:
2973 return "DW_AT_element_list";
2974 case DW_AT_stmt_list:
2975 return "DW_AT_stmt_list";
2977 return "DW_AT_low_pc";
2979 return "DW_AT_high_pc";
2980 case DW_AT_language:
2981 return "DW_AT_language";
2983 return "DW_AT_member";
2985 return "DW_AT_discr";
2986 case DW_AT_discr_value:
2987 return "DW_AT_discr_value";
2988 case DW_AT_visibility:
2989 return "DW_AT_visibility";
2991 return "DW_AT_import";
2992 case DW_AT_string_length:
2993 return "DW_AT_string_length";
2994 case DW_AT_common_reference:
2995 return "DW_AT_common_reference";
2996 case DW_AT_comp_dir:
2997 return "DW_AT_comp_dir";
2998 case DW_AT_const_value:
2999 return "DW_AT_const_value";
3000 case DW_AT_containing_type:
3001 return "DW_AT_containing_type";
3002 case DW_AT_default_value:
3003 return "DW_AT_default_value";
3005 return "DW_AT_inline";
3006 case DW_AT_is_optional:
3007 return "DW_AT_is_optional";
3008 case DW_AT_lower_bound:
3009 return "DW_AT_lower_bound";
3010 case DW_AT_producer:
3011 return "DW_AT_producer";
3012 case DW_AT_prototyped:
3013 return "DW_AT_prototyped";
3014 case DW_AT_return_addr:
3015 return "DW_AT_return_addr";
3016 case DW_AT_start_scope:
3017 return "DW_AT_start_scope";
3018 case DW_AT_stride_size:
3019 return "DW_AT_stride_size";
3020 case DW_AT_upper_bound:
3021 return "DW_AT_upper_bound";
3022 case DW_AT_abstract_origin:
3023 return "DW_AT_abstract_origin";
3024 case DW_AT_accessibility:
3025 return "DW_AT_accessibility";
3026 case DW_AT_address_class:
3027 return "DW_AT_address_class";
3028 case DW_AT_artificial:
3029 return "DW_AT_artificial";
3030 case DW_AT_base_types:
3031 return "DW_AT_base_types";
3032 case DW_AT_calling_convention:
3033 return "DW_AT_calling_convention";
3035 return "DW_AT_count";
3036 case DW_AT_data_member_location:
3037 return "DW_AT_data_member_location";
3038 case DW_AT_decl_column:
3039 return "DW_AT_decl_column";
3040 case DW_AT_decl_file:
3041 return "DW_AT_decl_file";
3042 case DW_AT_decl_line:
3043 return "DW_AT_decl_line";
3044 case DW_AT_declaration:
3045 return "DW_AT_declaration";
3046 case DW_AT_discr_list:
3047 return "DW_AT_discr_list";
3048 case DW_AT_encoding:
3049 return "DW_AT_encoding";
3050 case DW_AT_external:
3051 return "DW_AT_external";
3052 case DW_AT_frame_base:
3053 return "DW_AT_frame_base";
3055 return "DW_AT_friend";
3056 case DW_AT_identifier_case:
3057 return "DW_AT_identifier_case";
3058 case DW_AT_macro_info:
3059 return "DW_AT_macro_info";
3060 case DW_AT_namelist_items:
3061 return "DW_AT_namelist_items";
3062 case DW_AT_priority:
3063 return "DW_AT_priority";
3065 return "DW_AT_segment";
3066 case DW_AT_specification:
3067 return "DW_AT_specification";
3068 case DW_AT_static_link:
3069 return "DW_AT_static_link";
3071 return "DW_AT_type";
3072 case DW_AT_use_location:
3073 return "DW_AT_use_location";
3074 case DW_AT_variable_parameter:
3075 return "DW_AT_variable_parameter";
3076 case DW_AT_virtuality:
3077 return "DW_AT_virtuality";
3078 case DW_AT_vtable_elem_location:
3079 return "DW_AT_vtable_elem_location";
3081 case DW_AT_MIPS_fde:
3082 return "DW_AT_MIPS_fde";
3083 case DW_AT_MIPS_loop_begin:
3084 return "DW_AT_MIPS_loop_begin";
3085 case DW_AT_MIPS_tail_loop_begin:
3086 return "DW_AT_MIPS_tail_loop_begin";
3087 case DW_AT_MIPS_epilog_begin:
3088 return "DW_AT_MIPS_epilog_begin";
3089 case DW_AT_MIPS_loop_unroll_factor:
3090 return "DW_AT_MIPS_loop_unroll_factor";
3091 case DW_AT_MIPS_software_pipeline_depth:
3092 return "DW_AT_MIPS_software_pipeline_depth";
3093 case DW_AT_MIPS_linkage_name:
3094 return "DW_AT_MIPS_linkage_name";
3095 case DW_AT_MIPS_stride:
3096 return "DW_AT_MIPS_stride";
3097 case DW_AT_MIPS_abstract_name:
3098 return "DW_AT_MIPS_abstract_name";
3099 case DW_AT_MIPS_clone_origin:
3100 return "DW_AT_MIPS_clone_origin";
3101 case DW_AT_MIPS_has_inlines:
3102 return "DW_AT_MIPS_has_inlines";
3104 case DW_AT_sf_names:
3105 return "DW_AT_sf_names";
3106 case DW_AT_src_info:
3107 return "DW_AT_src_info";
3108 case DW_AT_mac_info:
3109 return "DW_AT_mac_info";
3110 case DW_AT_src_coords:
3111 return "DW_AT_src_coords";
3112 case DW_AT_body_begin:
3113 return "DW_AT_body_begin";
3114 case DW_AT_body_end:
3115 return "DW_AT_body_end";
3117 return "DW_AT_<unknown>";
3121 /* Convert a DWARF value form code into its string name. */
3124 dwarf_form_name (form)
3125 register unsigned form;
3130 return "DW_FORM_addr";
3131 case DW_FORM_block2:
3132 return "DW_FORM_block2";
3133 case DW_FORM_block4:
3134 return "DW_FORM_block4";
3136 return "DW_FORM_data2";
3138 return "DW_FORM_data4";
3140 return "DW_FORM_data8";
3141 case DW_FORM_string:
3142 return "DW_FORM_string";
3144 return "DW_FORM_block";
3145 case DW_FORM_block1:
3146 return "DW_FORM_block1";
3148 return "DW_FORM_data1";
3150 return "DW_FORM_flag";
3152 return "DW_FORM_sdata";
3154 return "DW_FORM_strp";
3156 return "DW_FORM_udata";
3157 case DW_FORM_ref_addr:
3158 return "DW_FORM_ref_addr";
3160 return "DW_FORM_ref1";
3162 return "DW_FORM_ref2";
3164 return "DW_FORM_ref4";
3166 return "DW_FORM_ref8";
3167 case DW_FORM_ref_udata:
3168 return "DW_FORM_ref_udata";
3169 case DW_FORM_indirect:
3170 return "DW_FORM_indirect";
3172 return "DW_FORM_<unknown>";
3176 /* Convert a DWARF stack opcode into its string name. */
3179 dwarf_stack_op_name (op)
3180 register unsigned op;
3185 return "DW_OP_addr";
3187 return "DW_OP_deref";
3189 return "DW_OP_const1u";
3191 return "DW_OP_const1s";
3193 return "DW_OP_const2u";
3195 return "DW_OP_const2s";
3197 return "DW_OP_const4u";
3199 return "DW_OP_const4s";
3201 return "DW_OP_const8u";
3203 return "DW_OP_const8s";
3205 return "DW_OP_constu";
3207 return "DW_OP_consts";
3211 return "DW_OP_drop";
3213 return "DW_OP_over";
3215 return "DW_OP_pick";
3217 return "DW_OP_swap";
3221 return "DW_OP_xderef";
3229 return "DW_OP_minus";
3241 return "DW_OP_plus";
3242 case DW_OP_plus_uconst:
3243 return "DW_OP_plus_uconst";
3249 return "DW_OP_shra";
3267 return "DW_OP_skip";
3269 return "DW_OP_lit0";
3271 return "DW_OP_lit1";
3273 return "DW_OP_lit2";
3275 return "DW_OP_lit3";
3277 return "DW_OP_lit4";
3279 return "DW_OP_lit5";
3281 return "DW_OP_lit6";
3283 return "DW_OP_lit7";
3285 return "DW_OP_lit8";
3287 return "DW_OP_lit9";
3289 return "DW_OP_lit10";
3291 return "DW_OP_lit11";
3293 return "DW_OP_lit12";
3295 return "DW_OP_lit13";
3297 return "DW_OP_lit14";
3299 return "DW_OP_lit15";
3301 return "DW_OP_lit16";
3303 return "DW_OP_lit17";
3305 return "DW_OP_lit18";
3307 return "DW_OP_lit19";
3309 return "DW_OP_lit20";
3311 return "DW_OP_lit21";
3313 return "DW_OP_lit22";
3315 return "DW_OP_lit23";
3317 return "DW_OP_lit24";
3319 return "DW_OP_lit25";
3321 return "DW_OP_lit26";
3323 return "DW_OP_lit27";
3325 return "DW_OP_lit28";
3327 return "DW_OP_lit29";
3329 return "DW_OP_lit30";
3331 return "DW_OP_lit31";
3333 return "DW_OP_reg0";
3335 return "DW_OP_reg1";
3337 return "DW_OP_reg2";
3339 return "DW_OP_reg3";
3341 return "DW_OP_reg4";
3343 return "DW_OP_reg5";
3345 return "DW_OP_reg6";
3347 return "DW_OP_reg7";
3349 return "DW_OP_reg8";
3351 return "DW_OP_reg9";
3353 return "DW_OP_reg10";
3355 return "DW_OP_reg11";
3357 return "DW_OP_reg12";
3359 return "DW_OP_reg13";
3361 return "DW_OP_reg14";
3363 return "DW_OP_reg15";
3365 return "DW_OP_reg16";
3367 return "DW_OP_reg17";
3369 return "DW_OP_reg18";
3371 return "DW_OP_reg19";
3373 return "DW_OP_reg20";
3375 return "DW_OP_reg21";
3377 return "DW_OP_reg22";
3379 return "DW_OP_reg23";
3381 return "DW_OP_reg24";
3383 return "DW_OP_reg25";
3385 return "DW_OP_reg26";
3387 return "DW_OP_reg27";
3389 return "DW_OP_reg28";
3391 return "DW_OP_reg29";
3393 return "DW_OP_reg30";
3395 return "DW_OP_reg31";
3397 return "DW_OP_breg0";
3399 return "DW_OP_breg1";
3401 return "DW_OP_breg2";
3403 return "DW_OP_breg3";
3405 return "DW_OP_breg4";
3407 return "DW_OP_breg5";
3409 return "DW_OP_breg6";
3411 return "DW_OP_breg7";
3413 return "DW_OP_breg8";
3415 return "DW_OP_breg9";
3417 return "DW_OP_breg10";
3419 return "DW_OP_breg11";
3421 return "DW_OP_breg12";
3423 return "DW_OP_breg13";
3425 return "DW_OP_breg14";
3427 return "DW_OP_breg15";
3429 return "DW_OP_breg16";
3431 return "DW_OP_breg17";
3433 return "DW_OP_breg18";
3435 return "DW_OP_breg19";
3437 return "DW_OP_breg20";
3439 return "DW_OP_breg21";
3441 return "DW_OP_breg22";
3443 return "DW_OP_breg23";
3445 return "DW_OP_breg24";
3447 return "DW_OP_breg25";
3449 return "DW_OP_breg26";
3451 return "DW_OP_breg27";
3453 return "DW_OP_breg28";
3455 return "DW_OP_breg29";
3457 return "DW_OP_breg30";
3459 return "DW_OP_breg31";
3461 return "DW_OP_regx";
3463 return "DW_OP_fbreg";
3465 return "DW_OP_bregx";
3467 return "DW_OP_piece";
3468 case DW_OP_deref_size:
3469 return "DW_OP_deref_size";
3470 case DW_OP_xderef_size:
3471 return "DW_OP_xderef_size";
3475 return "OP_<unknown>";
3479 /* Convert a DWARF type code into its string name. */
3483 dwarf_type_encoding_name (enc)
3484 register unsigned enc;
3488 case DW_ATE_address:
3489 return "DW_ATE_address";
3490 case DW_ATE_boolean:
3491 return "DW_ATE_boolean";
3492 case DW_ATE_complex_float:
3493 return "DW_ATE_complex_float";
3495 return "DW_ATE_float";
3497 return "DW_ATE_signed";
3498 case DW_ATE_signed_char:
3499 return "DW_ATE_signed_char";
3500 case DW_ATE_unsigned:
3501 return "DW_ATE_unsigned";
3502 case DW_ATE_unsigned_char:
3503 return "DW_ATE_unsigned_char";
3505 return "DW_ATE_<unknown>";
3510 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3511 instance of an inlined instance of a decl which is local to an inline
3512 function, so we have to trace all of the way back through the origin chain
3513 to find out what sort of node actually served as the original seed for the
3517 decl_ultimate_origin (decl)
3520 register tree immediate_origin = DECL_ABSTRACT_ORIGIN (decl);
3522 if (immediate_origin == NULL_TREE)
3526 register tree ret_val;
3527 register tree lookahead = immediate_origin;
3531 ret_val = lookahead;
3532 lookahead = DECL_ABSTRACT_ORIGIN (ret_val);
3534 while (lookahead != NULL && lookahead != ret_val);
3540 /* Determine the "ultimate origin" of a block. The block may be an inlined
3541 instance of an inlined instance of a block which is local to an inline
3542 function, so we have to trace all of the way back through the origin chain
3543 to find out what sort of node actually served as the original seed for the
3547 block_ultimate_origin (block)
3548 register tree block;
3550 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3552 if (immediate_origin == NULL_TREE)
3556 register tree ret_val;
3557 register tree lookahead = immediate_origin;
3561 ret_val = lookahead;
3562 lookahead = (TREE_CODE (ret_val) == BLOCK)
3563 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3566 while (lookahead != NULL && lookahead != ret_val);
3572 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3573 of a virtual function may refer to a base class, so we check the 'this'
3577 decl_class_context (decl)
3580 tree context = NULL_TREE;
3582 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3583 context = DECL_CONTEXT (decl);
3585 context = TYPE_MAIN_VARIANT
3586 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3588 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3589 context = NULL_TREE;
3594 /* Add an attribute/value pair to a DIE */
3597 add_dwarf_attr (die, attr)
3598 register dw_die_ref die;
3599 register dw_attr_ref attr;
3601 if (die != NULL && attr != NULL)
3603 if (die->die_attr == NULL)
3605 die->die_attr = attr;
3606 die->die_attr_last = attr;
3610 die->die_attr_last->dw_attr_next = attr;
3611 die->die_attr_last = attr;
3616 /* Add a flag value attribute to a DIE. */
3619 add_AT_flag (die, attr_kind, flag)
3620 register dw_die_ref die;
3621 register enum dwarf_attribute attr_kind;
3622 register unsigned flag;
3624 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3626 attr->dw_attr_next = NULL;
3627 attr->dw_attr = attr_kind;
3628 attr->dw_attr_val.val_class = dw_val_class_flag;
3629 attr->dw_attr_val.v.val_flag = flag;
3630 add_dwarf_attr (die, attr);
3633 /* Add a signed integer attribute value to a DIE. */
3636 add_AT_int (die, attr_kind, int_val)
3637 register dw_die_ref die;
3638 register enum dwarf_attribute attr_kind;
3639 register long int int_val;
3641 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3643 attr->dw_attr_next = NULL;
3644 attr->dw_attr = attr_kind;
3645 attr->dw_attr_val.val_class = dw_val_class_const;
3646 attr->dw_attr_val.v.val_int = int_val;
3647 add_dwarf_attr (die, attr);
3650 /* Add an unsigned integer attribute value to a DIE. */
3653 add_AT_unsigned (die, attr_kind, unsigned_val)
3654 register dw_die_ref die;
3655 register enum dwarf_attribute attr_kind;
3656 register unsigned long unsigned_val;
3658 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3660 attr->dw_attr_next = NULL;
3661 attr->dw_attr = attr_kind;
3662 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
3663 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3664 add_dwarf_attr (die, attr);
3667 /* Add an unsigned double integer attribute value to a DIE. */
3670 add_AT_long_long (die, attr_kind, val_hi, val_low)
3671 register dw_die_ref die;
3672 register enum dwarf_attribute attr_kind;
3673 register unsigned long val_hi;
3674 register unsigned long val_low;
3676 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3678 attr->dw_attr_next = NULL;
3679 attr->dw_attr = attr_kind;
3680 attr->dw_attr_val.val_class = dw_val_class_long_long;
3681 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3682 attr->dw_attr_val.v.val_long_long.low = val_low;
3683 add_dwarf_attr (die, attr);
3686 /* Add a floating point attribute value to a DIE and return it. */
3689 add_AT_float (die, attr_kind, length, array)
3690 register dw_die_ref die;
3691 register enum dwarf_attribute attr_kind;
3692 register unsigned length;
3693 register long *array;
3695 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3697 attr->dw_attr_next = NULL;
3698 attr->dw_attr = attr_kind;
3699 attr->dw_attr_val.val_class = dw_val_class_float;
3700 attr->dw_attr_val.v.val_float.length = length;
3701 attr->dw_attr_val.v.val_float.array = array;
3702 add_dwarf_attr (die, attr);
3705 /* Add a string attribute value to a DIE. */
3708 add_AT_string (die, attr_kind, str)
3709 register dw_die_ref die;
3710 register enum dwarf_attribute attr_kind;
3713 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3715 attr->dw_attr_next = NULL;
3716 attr->dw_attr = attr_kind;
3717 attr->dw_attr_val.val_class = dw_val_class_str;
3718 attr->dw_attr_val.v.val_str = xstrdup (str);
3719 add_dwarf_attr (die, attr);
3722 /* Add a DIE reference attribute value to a DIE. */
3725 add_AT_die_ref (die, attr_kind, targ_die)
3726 register dw_die_ref die;
3727 register enum dwarf_attribute attr_kind;
3728 register dw_die_ref targ_die;
3730 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3732 attr->dw_attr_next = NULL;
3733 attr->dw_attr = attr_kind;
3734 attr->dw_attr_val.val_class = dw_val_class_die_ref;
3735 attr->dw_attr_val.v.val_die_ref = targ_die;
3736 add_dwarf_attr (die, attr);
3739 /* Add an FDE reference attribute value to a DIE. */
3742 add_AT_fde_ref (die, attr_kind, targ_fde)
3743 register dw_die_ref die;
3744 register enum dwarf_attribute attr_kind;
3745 register unsigned targ_fde;
3747 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3749 attr->dw_attr_next = NULL;
3750 attr->dw_attr = attr_kind;
3751 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
3752 attr->dw_attr_val.v.val_fde_index = targ_fde;
3753 add_dwarf_attr (die, attr);
3756 /* Add a location description attribute value to a DIE. */
3759 add_AT_loc (die, attr_kind, loc)
3760 register dw_die_ref die;
3761 register enum dwarf_attribute attr_kind;
3762 register dw_loc_descr_ref loc;
3764 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3766 attr->dw_attr_next = NULL;
3767 attr->dw_attr = attr_kind;
3768 attr->dw_attr_val.val_class = dw_val_class_loc;
3769 attr->dw_attr_val.v.val_loc = loc;
3770 add_dwarf_attr (die, attr);
3773 /* Add an address constant attribute value to a DIE. */
3776 add_AT_addr (die, attr_kind, addr)
3777 register dw_die_ref die;
3778 register enum dwarf_attribute attr_kind;
3781 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3783 attr->dw_attr_next = NULL;
3784 attr->dw_attr = attr_kind;
3785 attr->dw_attr_val.val_class = dw_val_class_addr;
3786 attr->dw_attr_val.v.val_addr = addr;
3787 add_dwarf_attr (die, attr);
3790 /* Add a label identifier attribute value to a DIE. */
3793 add_AT_lbl_id (die, attr_kind, lbl_id)
3794 register dw_die_ref die;
3795 register enum dwarf_attribute attr_kind;
3796 register char *lbl_id;
3798 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3800 attr->dw_attr_next = NULL;
3801 attr->dw_attr = attr_kind;
3802 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3803 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3804 add_dwarf_attr (die, attr);
3807 /* Add a section offset attribute value to a DIE. */
3810 add_AT_section_offset (die, attr_kind, section)
3811 register dw_die_ref die;
3812 register enum dwarf_attribute attr_kind;
3813 register char *section;
3815 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3817 attr->dw_attr_next = NULL;
3818 attr->dw_attr = attr_kind;
3819 attr->dw_attr_val.val_class = dw_val_class_section_offset;
3820 attr->dw_attr_val.v.val_section = section;
3821 add_dwarf_attr (die, attr);
3825 /* Test if die refers to an external subroutine. */
3828 is_extern_subr_die (die)
3829 register dw_die_ref die;
3831 register dw_attr_ref a;
3832 register int is_subr = FALSE;
3833 register int is_extern = FALSE;
3835 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3838 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3840 if (a->dw_attr == DW_AT_external
3841 && a->dw_attr_val.val_class == dw_val_class_flag
3842 && a->dw_attr_val.v.val_flag != 0)
3850 return is_subr && is_extern;
3853 /* Get the attribute of type attr_kind. */
3855 static inline dw_attr_ref
3856 get_AT (die, attr_kind)
3857 register dw_die_ref die;
3858 register enum dwarf_attribute attr_kind;
3860 register dw_attr_ref a;
3861 register dw_die_ref spec = NULL;
3865 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3867 if (a->dw_attr == attr_kind)
3870 if (a->dw_attr == DW_AT_specification
3871 || a->dw_attr == DW_AT_abstract_origin)
3872 spec = a->dw_attr_val.v.val_die_ref;
3876 return get_AT (spec, attr_kind);
3882 /* Return the "low pc" attribute value, typically associated with
3883 a subprogram DIE. Return null if the "low pc" attribute is
3884 either not prsent, or if it cannot be represented as an
3885 assembler label identifier. */
3887 static inline char *
3889 register dw_die_ref die;
3891 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3893 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3894 return a->dw_attr_val.v.val_lbl_id;
3899 /* Return the "high pc" attribute value, typically associated with
3900 a subprogram DIE. Return null if the "high pc" attribute is
3901 either not prsent, or if it cannot be represented as an
3902 assembler label identifier. */
3904 static inline char *
3906 register dw_die_ref die;
3908 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
3910 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3911 return a->dw_attr_val.v.val_lbl_id;
3916 /* Return the value of the string attribute designated by ATTR_KIND, or
3917 NULL if it is not present. */
3919 static inline char *
3920 get_AT_string (die, attr_kind)
3921 register dw_die_ref die;
3922 register enum dwarf_attribute attr_kind;
3924 register dw_attr_ref a = get_AT (die, attr_kind);
3926 if (a && a->dw_attr_val.val_class == dw_val_class_str)
3927 return a->dw_attr_val.v.val_str;
3932 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3933 if it is not present. */
3936 get_AT_flag (die, attr_kind)
3937 register dw_die_ref die;
3938 register enum dwarf_attribute attr_kind;
3940 register dw_attr_ref a = get_AT (die, attr_kind);
3942 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
3943 return a->dw_attr_val.v.val_flag;
3948 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3949 if it is not present. */
3951 static inline unsigned
3952 get_AT_unsigned (die, attr_kind)
3953 register dw_die_ref die;
3954 register enum dwarf_attribute attr_kind;
3956 register dw_attr_ref a = get_AT (die, attr_kind);
3958 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
3959 return a->dw_attr_val.v.val_unsigned;
3967 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3969 return (lang == DW_LANG_C || lang == DW_LANG_C89
3970 || lang == DW_LANG_C_plus_plus);
3976 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3978 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
3981 /* Remove the specified attribute if present. */
3984 remove_AT (die, attr_kind)
3985 register dw_die_ref die;
3986 register enum dwarf_attribute attr_kind;
3988 register dw_attr_ref a;
3989 register dw_attr_ref removed = NULL;;
3993 if (die->die_attr->dw_attr == attr_kind)
3995 removed = die->die_attr;
3996 if (die->die_attr_last == die->die_attr)
3997 die->die_attr_last = NULL;
3999 die->die_attr = die->die_attr->dw_attr_next;
4003 for (a = die->die_attr; a->dw_attr_next != NULL;
4004 a = a->dw_attr_next)
4005 if (a->dw_attr_next->dw_attr == attr_kind)
4007 removed = a->dw_attr_next;
4008 if (die->die_attr_last == a->dw_attr_next)
4009 die->die_attr_last = a;
4011 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4020 /* Discard the children of this DIE. */
4023 remove_children (die)
4024 register dw_die_ref die;
4026 register dw_die_ref child_die = die->die_child;
4028 die->die_child = NULL;
4029 die->die_child_last = NULL;
4031 while (child_die != NULL)
4033 register dw_die_ref tmp_die = child_die;
4034 register dw_attr_ref a;
4036 child_die = child_die->die_sib;
4038 for (a = tmp_die->die_attr; a != NULL; )
4040 register dw_attr_ref tmp_a = a;
4042 a = a->dw_attr_next;
4050 /* Add a child DIE below its parent. */
4053 add_child_die (die, child_die)
4054 register dw_die_ref die;
4055 register dw_die_ref child_die;
4057 if (die != NULL && child_die != NULL)
4059 if (die == child_die)
4061 child_die->die_parent = die;
4062 child_die->die_sib = NULL;
4064 if (die->die_child == NULL)
4066 die->die_child = child_die;
4067 die->die_child_last = child_die;
4071 die->die_child_last->die_sib = child_die;
4072 die->die_child_last = child_die;
4077 /* Return a pointer to a newly created DIE node. */
4079 static inline dw_die_ref
4080 new_die (tag_value, parent_die)
4081 register enum dwarf_tag tag_value;
4082 register dw_die_ref parent_die;
4084 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4086 die->die_tag = tag_value;
4087 die->die_abbrev = 0;
4088 die->die_offset = 0;
4089 die->die_child = NULL;
4090 die->die_parent = NULL;
4091 die->die_sib = NULL;
4092 die->die_child_last = NULL;
4093 die->die_attr = NULL;
4094 die->die_attr_last = NULL;
4096 if (parent_die != NULL)
4097 add_child_die (parent_die, die);
4100 limbo_die_node *limbo_node;
4102 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4103 limbo_node->die = die;
4104 limbo_node->next = limbo_die_list;
4105 limbo_die_list = limbo_node;
4111 /* Return the DIE associated with the given type specifier. */
4113 static inline dw_die_ref
4114 lookup_type_die (type)
4117 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4120 /* Equate a DIE to a given type specifier. */
4123 equate_type_number_to_die (type, type_die)
4125 register dw_die_ref type_die;
4127 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4130 /* Return the DIE associated with a given declaration. */
4132 static inline dw_die_ref
4133 lookup_decl_die (decl)
4136 register unsigned decl_id = DECL_UID (decl);
4138 return (decl_id < decl_die_table_in_use
4139 ? decl_die_table[decl_id] : NULL);
4142 /* Equate a DIE to a particular declaration. */
4145 equate_decl_number_to_die (decl, decl_die)
4147 register dw_die_ref decl_die;
4149 register unsigned decl_id = DECL_UID (decl);
4150 register unsigned num_allocated;
4152 if (decl_id >= decl_die_table_allocated)
4155 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4156 / DECL_DIE_TABLE_INCREMENT)
4157 * DECL_DIE_TABLE_INCREMENT;
4160 = (dw_die_ref *) xrealloc (decl_die_table,
4161 sizeof (dw_die_ref) * num_allocated);
4163 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4164 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4165 decl_die_table_allocated = num_allocated;
4168 if (decl_id >= decl_die_table_in_use)
4169 decl_die_table_in_use = (decl_id + 1);
4171 decl_die_table[decl_id] = decl_die;
4174 /* Return a pointer to a newly allocated location description. Location
4175 descriptions are simple expression terms that can be strung
4176 together to form more complicated location (address) descriptions. */
4178 static inline dw_loc_descr_ref
4179 new_loc_descr (op, oprnd1, oprnd2)
4180 register enum dwarf_location_atom op;
4181 register unsigned long oprnd1;
4182 register unsigned long oprnd2;
4184 register dw_loc_descr_ref descr
4185 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4187 descr->dw_loc_next = NULL;
4188 descr->dw_loc_opc = op;
4189 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4190 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4191 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4192 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4197 /* Add a location description term to a location description expression. */
4200 add_loc_descr (list_head, descr)
4201 register dw_loc_descr_ref *list_head;
4202 register dw_loc_descr_ref descr;
4204 register dw_loc_descr_ref *d;
4206 /* Find the end of the chain. */
4207 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4213 /* Keep track of the number of spaces used to indent the
4214 output of the debugging routines that print the structure of
4215 the DIE internal representation. */
4216 static int print_indent;
4218 /* Indent the line the number of spaces given by print_indent. */
4221 print_spaces (outfile)
4224 fprintf (outfile, "%*s", print_indent, "");
4227 /* Print the information associated with a given DIE, and its children.
4228 This routine is a debugging aid only. */
4231 print_die (die, outfile)
4235 register dw_attr_ref a;
4236 register dw_die_ref c;
4238 print_spaces (outfile);
4239 fprintf (outfile, "DIE %4lu: %s\n",
4240 die->die_offset, dwarf_tag_name (die->die_tag));
4241 print_spaces (outfile);
4242 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4243 fprintf (outfile, " offset: %lu\n", die->die_offset);
4245 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4247 print_spaces (outfile);
4248 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4250 switch (a->dw_attr_val.val_class)
4252 case dw_val_class_addr:
4253 fprintf (outfile, "address");
4255 case dw_val_class_loc:
4256 fprintf (outfile, "location descriptor");
4258 case dw_val_class_const:
4259 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4261 case dw_val_class_unsigned_const:
4262 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4264 case dw_val_class_long_long:
4265 fprintf (outfile, "constant (%lu,%lu)",
4266 a->dw_attr_val.v.val_long_long.hi,
4267 a->dw_attr_val.v.val_long_long.low);
4269 case dw_val_class_float:
4270 fprintf (outfile, "floating-point constant");
4272 case dw_val_class_flag:
4273 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4275 case dw_val_class_die_ref:
4276 if (a->dw_attr_val.v.val_die_ref != NULL)
4277 fprintf (outfile, "die -> %lu",
4278 a->dw_attr_val.v.val_die_ref->die_offset);
4280 fprintf (outfile, "die -> <null>");
4282 case dw_val_class_lbl_id:
4283 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4285 case dw_val_class_section_offset:
4286 fprintf (outfile, "section: %s", a->dw_attr_val.v.val_section);
4288 case dw_val_class_str:
4289 if (a->dw_attr_val.v.val_str != NULL)
4290 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4292 fprintf (outfile, "<null>");
4298 fprintf (outfile, "\n");
4301 if (die->die_child != NULL)
4304 for (c = die->die_child; c != NULL; c = c->die_sib)
4305 print_die (c, outfile);
4311 /* Print the contents of the source code line number correspondence table.
4312 This routine is a debugging aid only. */
4315 print_dwarf_line_table (outfile)
4318 register unsigned i;
4319 register dw_line_info_ref line_info;
4321 fprintf (outfile, "\n\nDWARF source line information\n");
4322 for (i = 1; i < line_info_table_in_use; ++i)
4324 line_info = &line_info_table[i];
4325 fprintf (outfile, "%5d: ", i);
4326 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4327 fprintf (outfile, "%6ld", line_info->dw_line_num);
4328 fprintf (outfile, "\n");
4331 fprintf (outfile, "\n\n");
4334 /* Print the information collected for a given DIE. */
4337 debug_dwarf_die (die)
4340 print_die (die, stderr);
4343 /* Print all DWARF information collected for the compilation unit.
4344 This routine is a debugging aid only. */
4350 print_die (comp_unit_die, stderr);
4351 print_dwarf_line_table (stderr);
4354 /* Traverse the DIE, and add a sibling attribute if it may have the
4355 effect of speeding up access to siblings. To save some space,
4356 avoid generating sibling attributes for DIE's without children. */
4359 add_sibling_attributes(die)
4360 register dw_die_ref die;
4362 register dw_die_ref c;
4363 register dw_attr_ref attr;
4364 if (die != comp_unit_die && die->die_child != NULL)
4366 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4367 attr->dw_attr_next = NULL;
4368 attr->dw_attr = DW_AT_sibling;
4369 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4370 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4372 /* Add the sibling link to the front of the attribute list. */
4373 attr->dw_attr_next = die->die_attr;
4374 if (die->die_attr == NULL)
4375 die->die_attr_last = attr;
4377 die->die_attr = attr;
4380 for (c = die->die_child; c != NULL; c = c->die_sib)
4381 add_sibling_attributes (c);
4384 /* The format of each DIE (and its attribute value pairs)
4385 is encoded in an abbreviation table. This routine builds the
4386 abbreviation table and assigns a unique abbreviation id for
4387 each abbreviation entry. The children of each die are visited
4391 build_abbrev_table (die)
4392 register dw_die_ref die;
4394 register unsigned long abbrev_id;
4395 register unsigned long n_alloc;
4396 register dw_die_ref c;
4397 register dw_attr_ref d_attr, a_attr;
4398 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4400 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4402 if (abbrev->die_tag == die->die_tag)
4404 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4406 a_attr = abbrev->die_attr;
4407 d_attr = die->die_attr;
4409 while (a_attr != NULL && d_attr != NULL)
4411 if ((a_attr->dw_attr != d_attr->dw_attr)
4412 || (value_format (&a_attr->dw_attr_val)
4413 != value_format (&d_attr->dw_attr_val)))
4416 a_attr = a_attr->dw_attr_next;
4417 d_attr = d_attr->dw_attr_next;
4420 if (a_attr == NULL && d_attr == NULL)
4426 if (abbrev_id >= abbrev_die_table_in_use)
4428 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4430 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4432 = (dw_die_ref *) xrealloc (abbrev_die_table,
4433 sizeof (dw_die_ref) * n_alloc);
4435 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4436 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4437 abbrev_die_table_allocated = n_alloc;
4440 ++abbrev_die_table_in_use;
4441 abbrev_die_table[abbrev_id] = die;
4444 die->die_abbrev = abbrev_id;
4445 for (c = die->die_child; c != NULL; c = c->die_sib)
4446 build_abbrev_table (c);
4449 /* Return the size of a string, including the null byte. */
4451 static unsigned long
4452 size_of_string (str)
4455 register unsigned long size = 0;
4456 register unsigned long slen = strlen (str);
4457 register unsigned long i;
4458 register unsigned c;
4460 for (i = 0; i < slen; ++i)
4469 /* Null terminator. */
4474 /* Return the size of a location descriptor. */
4476 static unsigned long
4477 size_of_loc_descr (loc)
4478 register dw_loc_descr_ref loc;
4480 register unsigned long size = 1;
4482 switch (loc->dw_loc_opc)
4504 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4507 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4512 case DW_OP_plus_uconst:
4513 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4551 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4554 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4557 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4560 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4561 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4564 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4566 case DW_OP_deref_size:
4567 case DW_OP_xderef_size:
4577 /* Return the size of a series of location descriptors. */
4579 static unsigned long
4581 register dw_loc_descr_ref loc;
4583 register unsigned long size = 0;
4585 for (; loc != NULL; loc = loc->dw_loc_next)
4586 size += size_of_loc_descr (loc);
4591 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4594 constant_size (value)
4595 long unsigned value;
4602 log = floor_log2 (value);
4605 log = 1 << (floor_log2 (log) + 1);
4610 /* Return the size of a DIE, as it is represented in the
4611 .debug_info section. */
4613 static unsigned long
4615 register dw_die_ref die;
4617 register unsigned long size = 0;
4618 register dw_attr_ref a;
4620 size += size_of_uleb128 (die->die_abbrev);
4621 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4623 switch (a->dw_attr_val.val_class)
4625 case dw_val_class_addr:
4628 case dw_val_class_loc:
4630 register unsigned long lsize
4631 = size_of_locs (a->dw_attr_val.v.val_loc);
4634 size += constant_size (lsize);
4638 case dw_val_class_const:
4641 case dw_val_class_unsigned_const:
4642 size += constant_size (a->dw_attr_val.v.val_unsigned);
4644 case dw_val_class_long_long:
4645 size += 1 + 8; /* block */
4647 case dw_val_class_float:
4648 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4650 case dw_val_class_flag:
4653 case dw_val_class_die_ref:
4654 size += DWARF_OFFSET_SIZE;
4656 case dw_val_class_fde_ref:
4657 size += DWARF_OFFSET_SIZE;
4659 case dw_val_class_lbl_id:
4662 case dw_val_class_section_offset:
4663 size += DWARF_OFFSET_SIZE;
4665 case dw_val_class_str:
4666 size += size_of_string (a->dw_attr_val.v.val_str);
4676 /* Size the debugging information associated with a given DIE.
4677 Visits the DIE's children recursively. Updates the global
4678 variable next_die_offset, on each time through. Uses the
4679 current value of next_die_offset to update the die_offset
4680 field in each DIE. */
4683 calc_die_sizes (die)
4686 register dw_die_ref c;
4687 die->die_offset = next_die_offset;
4688 next_die_offset += size_of_die (die);
4690 for (c = die->die_child; c != NULL; c = c->die_sib)
4693 if (die->die_child != NULL)
4694 /* Count the null byte used to terminate sibling lists. */
4695 next_die_offset += 1;
4698 /* Return the size of the line information prolog generated for the
4699 compilation unit. */
4701 static unsigned long
4702 size_of_line_prolog ()
4704 register unsigned long size;
4705 register unsigned long ft_index;
4707 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4709 /* Count the size of the table giving number of args for each
4711 size += DWARF_LINE_OPCODE_BASE - 1;
4713 /* Include directory table is empty (at present). Count only the
4714 null byte used to terminate the table. */
4717 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4719 /* File name entry. */
4720 size += size_of_string (file_table[ft_index]);
4722 /* Include directory index. */
4723 size += size_of_uleb128 (0);
4725 /* Modification time. */
4726 size += size_of_uleb128 (0);
4728 /* File length in bytes. */
4729 size += size_of_uleb128 (0);
4732 /* Count the file table terminator. */
4737 /* Return the size of the line information generated for this
4738 compilation unit. */
4740 static unsigned long
4741 size_of_line_info ()
4743 register unsigned long size;
4744 register unsigned long lt_index;
4745 register unsigned long current_line;
4746 register long line_offset;
4747 register long line_delta;
4748 register unsigned long current_file;
4749 register unsigned long function;
4750 unsigned long size_of_set_address;
4752 /* Size of a DW_LNE_set_address instruction. */
4753 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4755 /* Version number. */
4758 /* Prolog length specifier. */
4759 size += DWARF_OFFSET_SIZE;
4762 size += size_of_line_prolog ();
4764 /* Set address register instruction. */
4765 size += size_of_set_address;
4769 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4771 register dw_line_info_ref line_info;
4773 /* Advance pc instruction. */
4774 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4778 size += size_of_set_address;
4780 line_info = &line_info_table[lt_index];
4781 if (line_info->dw_file_num != current_file)
4783 /* Set file number instruction. */
4785 current_file = line_info->dw_file_num;
4786 size += size_of_uleb128 (current_file);
4789 if (line_info->dw_line_num != current_line)
4791 line_offset = line_info->dw_line_num - current_line;
4792 line_delta = line_offset - DWARF_LINE_BASE;
4793 current_line = line_info->dw_line_num;
4794 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4795 /* 1-byte special line number instruction. */
4799 /* Advance line instruction. */
4801 size += size_of_sleb128 (line_offset);
4802 /* Generate line entry instruction. */
4808 /* Advance pc instruction. */
4812 size += size_of_set_address;
4814 /* End of line number info. marker. */
4815 size += 1 + size_of_uleb128 (1) + 1;
4820 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4822 register dw_separate_line_info_ref line_info
4823 = &separate_line_info_table[lt_index];
4824 if (function != line_info->function)
4826 function = line_info->function;
4827 /* Set address register instruction. */
4828 size += size_of_set_address;
4832 /* Advance pc instruction. */
4836 size += size_of_set_address;
4839 if (line_info->dw_file_num != current_file)
4841 /* Set file number instruction. */
4843 current_file = line_info->dw_file_num;
4844 size += size_of_uleb128 (current_file);
4847 if (line_info->dw_line_num != current_line)
4849 line_offset = line_info->dw_line_num - current_line;
4850 line_delta = line_offset - DWARF_LINE_BASE;
4851 current_line = line_info->dw_line_num;
4852 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4853 /* 1-byte special line number instruction. */
4857 /* Advance line instruction. */
4859 size += size_of_sleb128 (line_offset);
4861 /* Generate line entry instruction. */
4868 /* If we're done with a function, end its sequence. */
4869 if (lt_index == separate_line_info_table_in_use
4870 || separate_line_info_table[lt_index].function != function)
4875 /* Advance pc instruction. */
4879 size += size_of_set_address;
4881 /* End of line number info. marker. */
4882 size += 1 + size_of_uleb128 (1) + 1;
4889 /* Return the size of the .debug_pubnames table generated for the
4890 compilation unit. */
4892 static unsigned long
4895 register unsigned long size;
4896 register unsigned i;
4898 size = DWARF_PUBNAMES_HEADER_SIZE;
4899 for (i = 0; i < pubname_table_in_use; ++i)
4901 register pubname_ref p = &pubname_table[i];
4902 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4905 size += DWARF_OFFSET_SIZE;
4909 /* Return the size of the information in the .debug_aranges section. */
4911 static unsigned long
4914 register unsigned long size;
4916 size = DWARF_ARANGES_HEADER_SIZE;
4918 /* Count the address/length pair for this compilation unit. */
4919 size += 2 * PTR_SIZE;
4920 size += 2 * PTR_SIZE * arange_table_in_use;
4922 /* Count the two zero words used to terminated the address range table. */
4923 size += 2 * PTR_SIZE;
4927 /* Select the encoding of an attribute value. */
4929 static enum dwarf_form
4933 switch (v->val_class)
4935 case dw_val_class_addr:
4936 return DW_FORM_addr;
4937 case dw_val_class_loc:
4938 switch (constant_size (size_of_locs (v->v.val_loc)))
4941 return DW_FORM_block1;
4943 return DW_FORM_block2;
4947 case dw_val_class_const:
4948 return DW_FORM_data4;
4949 case dw_val_class_unsigned_const:
4950 switch (constant_size (v->v.val_unsigned))
4953 return DW_FORM_data1;
4955 return DW_FORM_data2;
4957 return DW_FORM_data4;
4959 return DW_FORM_data8;
4963 case dw_val_class_long_long:
4964 return DW_FORM_block1;
4965 case dw_val_class_float:
4966 return DW_FORM_block1;
4967 case dw_val_class_flag:
4968 return DW_FORM_flag;
4969 case dw_val_class_die_ref:
4971 case dw_val_class_fde_ref:
4972 return DW_FORM_data;
4973 case dw_val_class_lbl_id:
4974 return DW_FORM_addr;
4975 case dw_val_class_section_offset:
4976 return DW_FORM_data;
4977 case dw_val_class_str:
4978 return DW_FORM_string;
4984 /* Output the encoding of an attribute value. */
4987 output_value_format (v)
4990 enum dwarf_form form = value_format (v);
4992 output_uleb128 (form);
4994 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
4996 fputc ('\n', asm_out_file);
4999 /* Output the .debug_abbrev section which defines the DIE abbreviation
5003 output_abbrev_section ()
5005 unsigned long abbrev_id;
5008 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5010 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5012 output_uleb128 (abbrev_id);
5014 fprintf (asm_out_file, " (abbrev code)");
5016 fputc ('\n', asm_out_file);
5017 output_uleb128 (abbrev->die_tag);
5019 fprintf (asm_out_file, " (TAG: %s)",
5020 dwarf_tag_name (abbrev->die_tag));
5022 fputc ('\n', asm_out_file);
5023 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5024 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5027 fprintf (asm_out_file, "\t%s %s",
5029 (abbrev->die_child != NULL
5030 ? "DW_children_yes" : "DW_children_no"));
5032 fputc ('\n', asm_out_file);
5034 for (a_attr = abbrev->die_attr; a_attr != NULL;
5035 a_attr = a_attr->dw_attr_next)
5037 output_uleb128 (a_attr->dw_attr);
5039 fprintf (asm_out_file, " (%s)",
5040 dwarf_attr_name (a_attr->dw_attr));
5042 fputc ('\n', asm_out_file);
5043 output_value_format (&a_attr->dw_attr_val);
5046 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5050 /* Output location description stack opcode's operands (if any). */
5053 output_loc_operands (loc)
5054 register dw_loc_descr_ref loc;
5056 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5057 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5059 switch (loc->dw_loc_opc)
5062 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5063 fputc ('\n', asm_out_file);
5067 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5068 fputc ('\n', asm_out_file);
5072 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5073 fputc ('\n', asm_out_file);
5077 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5078 fputc ('\n', asm_out_file);
5083 fputc ('\n', asm_out_file);
5086 output_uleb128 (val1->v.val_unsigned);
5087 fputc ('\n', asm_out_file);
5090 output_sleb128 (val1->v.val_int);
5091 fputc ('\n', asm_out_file);
5094 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5095 fputc ('\n', asm_out_file);
5097 case DW_OP_plus_uconst:
5098 output_uleb128 (val1->v.val_unsigned);
5099 fputc ('\n', asm_out_file);
5103 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5104 fputc ('\n', asm_out_file);
5138 output_sleb128 (val1->v.val_int);
5139 fputc ('\n', asm_out_file);
5142 output_uleb128 (val1->v.val_unsigned);
5143 fputc ('\n', asm_out_file);
5146 output_sleb128 (val1->v.val_int);
5147 fputc ('\n', asm_out_file);
5150 output_uleb128 (val1->v.val_unsigned);
5151 fputc ('\n', asm_out_file);
5152 output_sleb128 (val2->v.val_int);
5153 fputc ('\n', asm_out_file);
5156 output_uleb128 (val1->v.val_unsigned);
5157 fputc ('\n', asm_out_file);
5159 case DW_OP_deref_size:
5160 case DW_OP_xderef_size:
5161 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5162 fputc ('\n', asm_out_file);
5169 /* Compute the offset of a sibling. */
5171 static unsigned long
5172 sibling_offset (die)
5175 unsigned long offset;
5177 if (die->die_child_last == NULL)
5178 offset = die->die_offset + size_of_die (die);
5180 offset = sibling_offset (die->die_child_last) + 1;
5185 /* Output the DIE and its attributes. Called recursively to generate
5186 the definitions of each child DIE. */
5190 register dw_die_ref die;
5192 register dw_attr_ref a;
5193 register dw_die_ref c;
5194 register unsigned long ref_offset;
5195 register unsigned long size;
5196 register dw_loc_descr_ref loc;
5199 output_uleb128 (die->die_abbrev);
5201 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5202 die->die_offset, dwarf_tag_name (die->die_tag));
5204 fputc ('\n', asm_out_file);
5206 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5208 switch (a->dw_attr_val.val_class)
5210 case dw_val_class_addr:
5211 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5212 a->dw_attr_val.v.val_addr);
5215 case dw_val_class_loc:
5216 size = size_of_locs (a->dw_attr_val.v.val_loc);
5218 /* Output the block length for this list of location operations. */
5219 switch (constant_size (size))
5222 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5225 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5232 fprintf (asm_out_file, "\t%s %s",
5233 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5235 fputc ('\n', asm_out_file);
5236 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5237 loc = loc->dw_loc_next)
5239 /* Output the opcode. */
5240 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5242 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5243 dwarf_stack_op_name (loc->dw_loc_opc));
5245 fputc ('\n', asm_out_file);
5247 /* Output the operand(s) (if any). */
5248 output_loc_operands (loc);
5252 case dw_val_class_const:
5253 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5256 case dw_val_class_unsigned_const:
5257 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5260 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5261 a->dw_attr_val.v.val_unsigned);
5264 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5265 a->dw_attr_val.v.val_unsigned);
5268 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5269 a->dw_attr_val.v.val_unsigned);
5272 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5273 a->dw_attr_val.v.val_long_long.hi,
5274 a->dw_attr_val.v.val_long_long.low);
5281 case dw_val_class_long_long:
5282 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5284 fprintf (asm_out_file, "\t%s %s",
5285 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5287 fputc ('\n', asm_out_file);
5288 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5289 a->dw_attr_val.v.val_long_long.hi,
5290 a->dw_attr_val.v.val_long_long.low);
5293 fprintf (asm_out_file,
5294 "\t%s long long constant", ASM_COMMENT_START);
5296 fputc ('\n', asm_out_file);
5299 case dw_val_class_float:
5300 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5301 a->dw_attr_val.v.val_float.length * 4);
5303 fprintf (asm_out_file, "\t%s %s",
5304 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5306 fputc ('\n', asm_out_file);
5307 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5309 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5310 a->dw_attr_val.v.val_float.array[i]);
5312 fprintf (asm_out_file, "\t%s fp constant word %d",
5313 ASM_COMMENT_START, i);
5315 fputc ('\n', asm_out_file);
5319 case dw_val_class_flag:
5320 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5323 case dw_val_class_die_ref:
5324 if (a->dw_attr_val.v.val_die_ref != NULL)
5325 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5326 else if (a->dw_attr == DW_AT_sibling)
5327 ref_offset = sibling_offset(die);
5331 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5334 case dw_val_class_fde_ref:
5337 ASM_GENERATE_INTERNAL_LABEL
5338 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5339 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5340 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5344 case dw_val_class_lbl_id:
5345 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5348 case dw_val_class_section_offset:
5349 ASM_OUTPUT_DWARF_OFFSET (asm_out_file,
5351 (a->dw_attr_val.v.val_section));
5354 case dw_val_class_str:
5356 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5358 ASM_OUTPUT_ASCII (asm_out_file,
5359 a->dw_attr_val.v.val_str,
5360 strlen (a->dw_attr_val.v.val_str) + 1);
5367 if (a->dw_attr_val.val_class != dw_val_class_loc
5368 && a->dw_attr_val.val_class != dw_val_class_long_long
5369 && a->dw_attr_val.val_class != dw_val_class_float)
5372 fprintf (asm_out_file, "\t%s %s",
5373 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5375 fputc ('\n', asm_out_file);
5379 for (c = die->die_child; c != NULL; c = c->die_sib)
5382 if (die->die_child != NULL)
5384 /* Add null byte to terminate sibling list. */
5385 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5387 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5388 ASM_COMMENT_START, die->die_offset);
5390 fputc ('\n', asm_out_file);
5394 /* Output the compilation unit that appears at the beginning of the
5395 .debug_info section, and precedes the DIE descriptions. */
5398 output_compilation_unit_header ()
5400 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5402 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5405 fputc ('\n', asm_out_file);
5406 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5408 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5410 fputc ('\n', asm_out_file);
5411 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (ABBREV_SECTION));
5413 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5416 fputc ('\n', asm_out_file);
5417 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5419 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5421 fputc ('\n', asm_out_file);
5424 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5425 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5426 argument list, and maybe the scope. */
5429 dwarf2_name (decl, scope)
5433 return (*decl_printable_name) (decl, scope ? 1 : 0);
5436 /* Add a new entry to .debug_pubnames if appropriate. */
5439 add_pubname (decl, die)
5445 if (! TREE_PUBLIC (decl))
5448 if (pubname_table_in_use == pubname_table_allocated)
5450 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5451 pubname_table = (pubname_ref) xrealloc
5452 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5455 p = &pubname_table[pubname_table_in_use++];
5458 p->name = xstrdup (dwarf2_name (decl, 1));
5461 /* Output the public names table used to speed up access to externally
5462 visible names. For now, only generate entries for externally
5463 visible procedures. */
5468 register unsigned i;
5469 register unsigned long pubnames_length = size_of_pubnames ();
5471 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5474 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5477 fputc ('\n', asm_out_file);
5478 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5481 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5483 fputc ('\n', asm_out_file);
5484 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5486 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5489 fputc ('\n', asm_out_file);
5490 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5492 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5494 fputc ('\n', asm_out_file);
5495 for (i = 0; i < pubname_table_in_use; ++i)
5497 register pubname_ref pub = &pubname_table[i];
5499 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5501 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5503 fputc ('\n', asm_out_file);
5507 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5508 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5512 ASM_OUTPUT_ASCII (asm_out_file, pub->name, strlen (pub->name) + 1);
5515 fputc ('\n', asm_out_file);
5518 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5519 fputc ('\n', asm_out_file);
5522 /* Add a new entry to .debug_aranges if appropriate. */
5525 add_arange (decl, die)
5529 if (! DECL_SECTION_NAME (decl))
5532 if (arange_table_in_use == arange_table_allocated)
5534 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5536 = (arange_ref) xrealloc (arange_table,
5537 arange_table_allocated * sizeof (dw_die_ref));
5540 arange_table[arange_table_in_use++] = die;
5543 /* Output the information that goes into the .debug_aranges table.
5544 Namely, define the beginning and ending address range of the
5545 text section generated for this compilation unit. */
5550 register unsigned i;
5551 register unsigned long aranges_length = size_of_aranges ();
5553 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5555 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5558 fputc ('\n', asm_out_file);
5559 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5561 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5563 fputc ('\n', asm_out_file);
5564 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5566 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5569 fputc ('\n', asm_out_file);
5570 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5572 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5574 fputc ('\n', asm_out_file);
5575 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5577 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5580 fputc ('\n', asm_out_file);
5581 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
5583 fprintf (asm_out_file, ",0,0");
5586 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5587 ASM_COMMENT_START, 2 * PTR_SIZE);
5589 fputc ('\n', asm_out_file);
5590 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
5592 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5594 fputc ('\n', asm_out_file);
5595 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label, TEXT_SECTION);
5597 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5599 fputc ('\n', asm_out_file);
5600 for (i = 0; i < arange_table_in_use; ++i)
5602 dw_die_ref a = arange_table[i];
5604 if (a->die_tag == DW_TAG_subprogram)
5605 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
5608 char *name = get_AT_string (a, DW_AT_MIPS_linkage_name);
5610 name = get_AT_string (a, DW_AT_name);
5612 ASM_OUTPUT_DWARF_ADDR (asm_out_file, name);
5616 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5618 fputc ('\n', asm_out_file);
5619 if (a->die_tag == DW_TAG_subprogram)
5620 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
5623 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5624 get_AT_unsigned (a, DW_AT_byte_size));
5627 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5629 fputc ('\n', asm_out_file);
5632 /* Output the terminator words. */
5633 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5634 fputc ('\n', asm_out_file);
5635 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5636 fputc ('\n', asm_out_file);
5639 /* Output the source line number correspondence information. This
5640 information goes into the .debug_line section.
5642 If the format of this data changes, then the function size_of_line_info
5643 must also be adjusted the same way. */
5648 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5649 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5650 register unsigned opc;
5651 register unsigned n_op_args;
5652 register unsigned long ft_index;
5653 register unsigned long lt_index;
5654 register unsigned long current_line;
5655 register long line_offset;
5656 register long line_delta;
5657 register unsigned long current_file;
5658 register unsigned long function;
5660 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5662 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5665 fputc ('\n', asm_out_file);
5666 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5668 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5670 fputc ('\n', asm_out_file);
5671 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5673 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5675 fputc ('\n', asm_out_file);
5676 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5678 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5681 fputc ('\n', asm_out_file);
5682 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5684 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5687 fputc ('\n', asm_out_file);
5688 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5690 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5693 fputc ('\n', asm_out_file);
5694 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5696 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5699 fputc ('\n', asm_out_file);
5700 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5702 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5704 fputc ('\n', asm_out_file);
5705 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5709 case DW_LNS_advance_pc:
5710 case DW_LNS_advance_line:
5711 case DW_LNS_set_file:
5712 case DW_LNS_set_column:
5713 case DW_LNS_fixed_advance_pc:
5720 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5722 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5723 ASM_COMMENT_START, opc, n_op_args);
5724 fputc ('\n', asm_out_file);
5728 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5730 /* Include directory table is empty, at present */
5731 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5732 fputc ('\n', asm_out_file);
5734 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5736 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5740 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5741 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5742 ASM_COMMENT_START, ft_index);
5746 ASM_OUTPUT_ASCII (asm_out_file,
5747 file_table[ft_index],
5748 strlen (file_table[ft_index]) + 1);
5751 fputc ('\n', asm_out_file);
5753 /* Include directory index */
5755 fputc ('\n', asm_out_file);
5757 /* Modification time */
5759 fputc ('\n', asm_out_file);
5761 /* File length in bytes */
5763 fputc ('\n', asm_out_file);
5766 /* Terminate the file name table */
5767 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5768 fputc ('\n', asm_out_file);
5770 /* Set the address register to the first location in the text section */
5771 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5773 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5775 fputc ('\n', asm_out_file);
5776 output_uleb128 (1 + PTR_SIZE);
5777 fputc ('\n', asm_out_file);
5778 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5779 fputc ('\n', asm_out_file);
5780 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
5781 fputc ('\n', asm_out_file);
5783 /* Generate the line number to PC correspondence table, encoded as
5784 a series of state machine operations. */
5787 strcpy (prev_line_label, TEXT_SECTION);
5788 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5790 register dw_line_info_ref line_info;
5792 /* Emit debug info for the address of the current line, choosing
5793 the encoding that uses the least amount of space. */
5794 /* ??? Unfortunately, we have little choice here currently, and must
5795 always use the most general form. Gcc does not know the address
5796 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5797 dwarf2 aware assemblers at this time, so we can't use any special
5798 pseudo ops that would allow the assembler to optimally encode this for
5799 us. Many ports do have length attributes which will give an upper
5800 bound on the address range. We could perhaps use length attributes
5801 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5802 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5805 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5806 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5808 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5811 fputc ('\n', asm_out_file);
5812 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5813 fputc ('\n', asm_out_file);
5817 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5818 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5820 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5822 fputc ('\n', asm_out_file);
5823 output_uleb128 (1 + PTR_SIZE);
5824 fputc ('\n', asm_out_file);
5825 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5826 fputc ('\n', asm_out_file);
5827 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5828 fputc ('\n', asm_out_file);
5830 strcpy (prev_line_label, line_label);
5832 /* Emit debug info for the source file of the current line, if
5833 different from the previous line. */
5834 line_info = &line_info_table[lt_index];
5835 if (line_info->dw_file_num != current_file)
5837 current_file = line_info->dw_file_num;
5838 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5840 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5842 fputc ('\n', asm_out_file);
5843 output_uleb128 (current_file);
5845 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5847 fputc ('\n', asm_out_file);
5850 /* Emit debug info for the current line number, choosing the encoding
5851 that uses the least amount of space. */
5852 line_offset = line_info->dw_line_num - current_line;
5853 line_delta = line_offset - DWARF_LINE_BASE;
5854 current_line = line_info->dw_line_num;
5855 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5857 /* This can handle deltas from -10 to 234, using the current
5858 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5860 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5861 DWARF_LINE_OPCODE_BASE + line_delta);
5863 fprintf (asm_out_file,
5864 "\t%s line %ld", ASM_COMMENT_START, current_line);
5866 fputc ('\n', asm_out_file);
5870 /* This can handle any delta. This takes at least 4 bytes, depending
5871 on the value being encoded. */
5872 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5874 fprintf (asm_out_file, "\t%s advance to line %ld",
5875 ASM_COMMENT_START, current_line);
5877 fputc ('\n', asm_out_file);
5878 output_sleb128 (line_offset);
5879 fputc ('\n', asm_out_file);
5880 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5881 fputc ('\n', asm_out_file);
5885 /* Emit debug info for the address of the end of the function. */
5888 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5890 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5893 fputc ('\n', asm_out_file);
5894 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
5895 fputc ('\n', asm_out_file);
5899 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5901 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5902 fputc ('\n', asm_out_file);
5903 output_uleb128 (1 + PTR_SIZE);
5904 fputc ('\n', asm_out_file);
5905 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5906 fputc ('\n', asm_out_file);
5907 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
5908 fputc ('\n', asm_out_file);
5911 /* Output the marker for the end of the line number info. */
5912 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5914 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
5916 fputc ('\n', asm_out_file);
5918 fputc ('\n', asm_out_file);
5919 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
5920 fputc ('\n', asm_out_file);
5925 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
5927 register dw_separate_line_info_ref line_info
5928 = &separate_line_info_table[lt_index];
5930 /* Emit debug info for the address of the current line. If this is
5931 a new function, or the first line of a function, then we need
5932 to handle it differently. */
5933 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
5935 if (function != line_info->function)
5937 function = line_info->function;
5939 /* Set the address register to the first line in the function */
5940 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5942 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5945 fputc ('\n', asm_out_file);
5946 output_uleb128 (1 + PTR_SIZE);
5947 fputc ('\n', asm_out_file);
5948 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5949 fputc ('\n', asm_out_file);
5950 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5951 fputc ('\n', asm_out_file);
5955 /* ??? See the DW_LNS_advance_pc comment above. */
5958 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5960 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5963 fputc ('\n', asm_out_file);
5964 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
5966 fputc ('\n', asm_out_file);
5970 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5972 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5974 fputc ('\n', asm_out_file);
5975 output_uleb128 (1 + PTR_SIZE);
5976 fputc ('\n', asm_out_file);
5977 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5978 fputc ('\n', asm_out_file);
5979 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5980 fputc ('\n', asm_out_file);
5983 strcpy (prev_line_label, line_label);
5985 /* Emit debug info for the source file of the current line, if
5986 different from the previous line. */
5987 if (line_info->dw_file_num != current_file)
5989 current_file = line_info->dw_file_num;
5990 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5992 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5994 fputc ('\n', asm_out_file);
5995 output_uleb128 (current_file);
5997 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5999 fputc ('\n', asm_out_file);
6002 /* Emit debug info for the current line number, choosing the encoding
6003 that uses the least amount of space. */
6004 if (line_info->dw_line_num != current_line)
6006 line_offset = line_info->dw_line_num - current_line;
6007 line_delta = line_offset - DWARF_LINE_BASE;
6008 current_line = line_info->dw_line_num;
6009 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6011 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6012 DWARF_LINE_OPCODE_BASE + line_delta);
6014 fprintf (asm_out_file,
6015 "\t%s line %ld", ASM_COMMENT_START, current_line);
6017 fputc ('\n', asm_out_file);
6021 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6023 fprintf (asm_out_file, "\t%s advance to line %ld",
6024 ASM_COMMENT_START, current_line);
6026 fputc ('\n', asm_out_file);
6027 output_sleb128 (line_offset);
6028 fputc ('\n', asm_out_file);
6029 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6030 fputc ('\n', asm_out_file);
6036 /* If we're done with a function, end its sequence. */
6037 if (lt_index == separate_line_info_table_in_use
6038 || separate_line_info_table[lt_index].function != function)
6043 /* Emit debug info for the address of the end of the function. */
6044 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6047 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6049 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6052 fputc ('\n', asm_out_file);
6053 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6055 fputc ('\n', asm_out_file);
6059 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6061 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6063 fputc ('\n', asm_out_file);
6064 output_uleb128 (1 + PTR_SIZE);
6065 fputc ('\n', asm_out_file);
6066 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6067 fputc ('\n', asm_out_file);
6068 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6069 fputc ('\n', asm_out_file);
6072 /* Output the marker for the end of this sequence. */
6073 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6075 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6078 fputc ('\n', asm_out_file);
6080 fputc ('\n', asm_out_file);
6081 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6082 fputc ('\n', asm_out_file);
6087 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6088 in question represents the outermost pair of curly braces (i.e. the "body
6089 block") of a function or method.
6091 For any BLOCK node representing a "body block" of a function or method, the
6092 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6093 represents the outermost (function) scope for the function or method (i.e.
6094 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6095 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6098 is_body_block (stmt)
6101 if (TREE_CODE (stmt) == BLOCK)
6103 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6105 if (TREE_CODE (parent) == BLOCK)
6107 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6109 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6117 /* Given a pointer to a tree node for some base type, return a pointer to
6118 a DIE that describes the given type.
6120 This routine must only be called for GCC type nodes that correspond to
6121 Dwarf base (fundamental) types. */
6124 base_type_die (type)
6127 register dw_die_ref base_type_result;
6128 register char *type_name;
6129 register enum dwarf_type encoding;
6130 register tree name = TYPE_NAME (type);
6132 if (TREE_CODE (type) == ERROR_MARK
6133 || TREE_CODE (type) == VOID_TYPE)
6136 if (TREE_CODE (name) == TYPE_DECL)
6137 name = DECL_NAME (name);
6138 type_name = IDENTIFIER_POINTER (name);
6140 switch (TREE_CODE (type))
6143 /* Carefully distinguish the C character types, without messing
6144 up if the language is not C. Note that we check only for the names
6145 that contain spaces; other names might occur by coincidence in other
6147 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6148 && (type == char_type_node
6149 || ! strcmp (type_name, "signed char")
6150 || ! strcmp (type_name, "unsigned char"))))
6152 if (TREE_UNSIGNED (type))
6153 encoding = DW_ATE_unsigned;
6155 encoding = DW_ATE_signed;
6158 /* else fall through */
6161 /* GNU Pascal/Ada CHAR type. Not used in C. */
6162 if (TREE_UNSIGNED (type))
6163 encoding = DW_ATE_unsigned_char;
6165 encoding = DW_ATE_signed_char;
6169 encoding = DW_ATE_float;
6173 encoding = DW_ATE_complex_float;
6177 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6178 encoding = DW_ATE_boolean;
6182 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6185 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6186 add_AT_string (base_type_result, DW_AT_name, type_name);
6187 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6188 int_size_in_bytes (type));
6189 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6191 return base_type_result;
6194 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6195 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6196 a given type is generally the same as the given type, except that if the
6197 given type is a pointer or reference type, then the root type of the given
6198 type is the root type of the "basis" type for the pointer or reference
6199 type. (This definition of the "root" type is recursive.) Also, the root
6200 type of a `const' qualified type or a `volatile' qualified type is the
6201 root type of the given type without the qualifiers. */
6207 if (TREE_CODE (type) == ERROR_MARK)
6208 return error_mark_node;
6210 switch (TREE_CODE (type))
6213 return error_mark_node;
6216 case REFERENCE_TYPE:
6217 return type_main_variant (root_type (TREE_TYPE (type)));
6220 return type_main_variant (type);
6224 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6225 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6231 switch (TREE_CODE (type))
6246 case QUAL_UNION_TYPE:
6251 case REFERENCE_TYPE:
6264 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6265 entry that chains various modifiers in front of the given type. */
6268 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6270 register int is_const_type;
6271 register int is_volatile_type;
6272 register dw_die_ref context_die;
6274 register enum tree_code code = TREE_CODE (type);
6275 register dw_die_ref mod_type_die = NULL;
6276 register dw_die_ref sub_die = NULL;
6277 register tree item_type = NULL;
6279 if (code != ERROR_MARK)
6281 type = build_type_variant (type, is_const_type, is_volatile_type);
6283 mod_type_die = lookup_type_die (type);
6285 return mod_type_die;
6287 /* Handle C typedef types. */
6288 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6289 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6291 tree dtype = TREE_TYPE (TYPE_NAME (type));
6294 /* For a named type, use the typedef. */
6295 gen_type_die (type, context_die);
6296 mod_type_die = lookup_type_die (type);
6299 else if (is_const_type < TYPE_READONLY (dtype)
6300 || is_volatile_type < TYPE_VOLATILE (dtype))
6301 /* cv-unqualified version of named type. Just use the unnamed
6302 type to which it refers. */
6304 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6305 is_const_type, is_volatile_type,
6307 /* Else cv-qualified version of named type; fall through. */
6312 else if (is_const_type)
6314 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6315 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6317 else if (is_volatile_type)
6319 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6320 sub_die = modified_type_die (type, 0, 0, context_die);
6322 else if (code == POINTER_TYPE)
6324 mod_type_die = new_die (DW_TAG_pointer_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 (code == REFERENCE_TYPE)
6333 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6334 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6336 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6338 item_type = TREE_TYPE (type);
6340 else if (is_base_type (type))
6341 mod_type_die = base_type_die (type);
6344 gen_type_die (type, context_die);
6346 /* We have to get the type_main_variant here (and pass that to the
6347 `lookup_type_die' routine) because the ..._TYPE node we have
6348 might simply be a *copy* of some original type node (where the
6349 copy was created to help us keep track of typedef names) and
6350 that copy might have a different TYPE_UID from the original
6352 mod_type_die = lookup_type_die (type_main_variant (type));
6353 if (mod_type_die == NULL)
6358 equate_type_number_to_die (type, mod_type_die);
6360 /* We must do this after the equate_type_number_to_die call, in case
6361 this is a recursive type. This ensures that the modified_type_die
6362 recursion will terminate even if the type is recursive. Recursive
6363 types are possible in Ada. */
6364 sub_die = modified_type_die (item_type,
6365 TYPE_READONLY (item_type),
6366 TYPE_VOLATILE (item_type),
6369 if (sub_die != NULL)
6370 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6372 return mod_type_die;
6375 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6376 an enumerated type. */
6382 return TREE_CODE (type) == ENUMERAL_TYPE;
6385 /* Return a location descriptor that designates a machine register. */
6387 static dw_loc_descr_ref
6388 reg_loc_descriptor (rtl)
6391 register dw_loc_descr_ref loc_result = NULL;
6392 register unsigned reg = reg_number (rtl);
6395 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6397 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6402 /* Return a location descriptor that designates a base+offset location. */
6404 static dw_loc_descr_ref
6405 based_loc_descr (reg, offset)
6409 register dw_loc_descr_ref loc_result;
6410 /* For the "frame base", we use the frame pointer or stack pointer
6411 registers, since the RTL for local variables is relative to one of
6413 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6414 ? HARD_FRAME_POINTER_REGNUM
6415 : STACK_POINTER_REGNUM);
6418 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6420 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6422 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6427 /* Return true if this RTL expression describes a base+offset calculation. */
6433 return (GET_CODE (rtl) == PLUS
6434 && ((GET_CODE (XEXP (rtl, 0)) == REG
6435 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6438 /* The following routine converts the RTL for a variable or parameter
6439 (resident in memory) into an equivalent Dwarf representation of a
6440 mechanism for getting the address of that same variable onto the top of a
6441 hypothetical "address evaluation" stack.
6443 When creating memory location descriptors, we are effectively transforming
6444 the RTL for a memory-resident object into its Dwarf postfix expression
6445 equivalent. This routine recursively descends an RTL tree, turning
6446 it into Dwarf postfix code as it goes. */
6448 static dw_loc_descr_ref
6449 mem_loc_descriptor (rtl)
6452 dw_loc_descr_ref mem_loc_result = NULL;
6453 /* Note that for a dynamically sized array, the location we will generate a
6454 description of here will be the lowest numbered location which is
6455 actually within the array. That's *not* necessarily the same as the
6456 zeroth element of the array. */
6458 switch (GET_CODE (rtl))
6461 /* The case of a subreg may arise when we have a local (register)
6462 variable or a formal (register) parameter which doesn't quite fill
6463 up an entire register. For now, just assume that it is
6464 legitimate to make the Dwarf info refer to the whole register which
6465 contains the given subreg. */
6466 rtl = XEXP (rtl, 0);
6468 /* ... fall through ... */
6471 /* Whenever a register number forms a part of the description of the
6472 method for calculating the (dynamic) address of a memory resident
6473 object, DWARF rules require the register number be referred to as
6474 a "base register". This distinction is not based in any way upon
6475 what category of register the hardware believes the given register
6476 belongs to. This is strictly DWARF terminology we're dealing with
6477 here. Note that in cases where the location of a memory-resident
6478 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6479 OP_CONST (0)) the actual DWARF location descriptor that we generate
6480 may just be OP_BASEREG (basereg). This may look deceptively like
6481 the object in question was allocated to a register (rather than in
6482 memory) so DWARF consumers need to be aware of the subtle
6483 distinction between OP_REG and OP_BASEREG. */
6484 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6488 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6489 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6494 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6495 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6496 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6500 if (is_based_loc (rtl))
6501 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6502 INTVAL (XEXP (rtl, 1)));
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_plus, 0, 0));
6512 /* If a pseudo-reg is optimized away, it is possible for it to
6513 be replaced with a MEM containing a multiply. */
6514 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6515 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6516 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6520 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6527 return mem_loc_result;
6530 /* Return a descriptor that describes the concatenation of two locations.
6531 This is typically a complex variable. */
6533 static dw_loc_descr_ref
6534 concat_loc_descriptor (x0, x1)
6535 register rtx x0, x1;
6537 dw_loc_descr_ref cc_loc_result = NULL;
6539 if (!is_pseudo_reg (x0)
6540 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6541 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6542 add_loc_descr (&cc_loc_result,
6543 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6545 if (!is_pseudo_reg (x1)
6546 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6547 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6548 add_loc_descr (&cc_loc_result,
6549 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6551 return cc_loc_result;
6554 /* Output a proper Dwarf location descriptor for a variable or parameter
6555 which is either allocated in a register or in a memory location. For a
6556 register, we just generate an OP_REG and the register number. For a
6557 memory location we provide a Dwarf postfix expression describing how to
6558 generate the (dynamic) address of the object onto the address stack. */
6560 static dw_loc_descr_ref
6561 loc_descriptor (rtl)
6564 dw_loc_descr_ref loc_result = NULL;
6565 switch (GET_CODE (rtl))
6568 /* The case of a subreg may arise when we have a local (register)
6569 variable or a formal (register) parameter which doesn't quite fill
6570 up an entire register. For now, just assume that it is
6571 legitimate to make the Dwarf info refer to the whole register which
6572 contains the given subreg. */
6573 rtl = XEXP (rtl, 0);
6575 /* ... fall through ... */
6578 loc_result = reg_loc_descriptor (rtl);
6582 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6586 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6596 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6597 which is not less than the value itself. */
6599 static inline unsigned
6600 ceiling (value, boundary)
6601 register unsigned value;
6602 register unsigned boundary;
6604 return (((value + boundary - 1) / boundary) * boundary);
6607 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6608 pointer to the declared type for the relevant field variable, or return
6609 `integer_type_node' if the given node turns out to be an
6618 if (TREE_CODE (decl) == ERROR_MARK)
6619 return integer_type_node;
6621 type = DECL_BIT_FIELD_TYPE (decl);
6622 if (type == NULL_TREE)
6623 type = TREE_TYPE (decl);
6628 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6629 node, return the alignment in bits for the type, or else return
6630 BITS_PER_WORD if the node actually turns out to be an
6633 static inline unsigned
6634 simple_type_align_in_bits (type)
6637 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6640 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6641 node, return the size in bits for the type if it is a constant, or else
6642 return the alignment for the type if the type's size is not constant, or
6643 else return BITS_PER_WORD if the type actually turns out to be an
6646 static inline unsigned
6647 simple_type_size_in_bits (type)
6650 if (TREE_CODE (type) == ERROR_MARK)
6651 return BITS_PER_WORD;
6654 register tree type_size_tree = TYPE_SIZE (type);
6656 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6657 return TYPE_ALIGN (type);
6659 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6663 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6664 return the byte offset of the lowest addressed byte of the "containing
6665 object" for the given FIELD_DECL, or return 0 if we are unable to
6666 determine what that offset is, either because the argument turns out to
6667 be a pointer to an ERROR_MARK node, or because the offset is actually
6668 variable. (We can't handle the latter case just yet). */
6671 field_byte_offset (decl)
6674 register unsigned type_align_in_bytes;
6675 register unsigned type_align_in_bits;
6676 register unsigned type_size_in_bits;
6677 register unsigned object_offset_in_align_units;
6678 register unsigned object_offset_in_bits;
6679 register unsigned object_offset_in_bytes;
6681 register tree bitpos_tree;
6682 register tree field_size_tree;
6683 register unsigned bitpos_int;
6684 register unsigned deepest_bitpos;
6685 register unsigned field_size_in_bits;
6687 if (TREE_CODE (decl) == ERROR_MARK)
6690 if (TREE_CODE (decl) != FIELD_DECL)
6693 type = field_type (decl);
6695 bitpos_tree = DECL_FIELD_BITPOS (decl);
6696 field_size_tree = DECL_SIZE (decl);
6698 /* We cannot yet cope with fields whose positions or sizes are variable, so
6699 for now, when we see such things, we simply return 0. Someday, we may
6700 be able to handle such cases, but it will be damn difficult. */
6701 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6703 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6705 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6708 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6709 type_size_in_bits = simple_type_size_in_bits (type);
6710 type_align_in_bits = simple_type_align_in_bits (type);
6711 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6713 /* Note that the GCC front-end doesn't make any attempt to keep track of
6714 the starting bit offset (relative to the start of the containing
6715 structure type) of the hypothetical "containing object" for a bit-
6716 field. Thus, when computing the byte offset value for the start of the
6717 "containing object" of a bit-field, we must deduce this information on
6718 our own. This can be rather tricky to do in some cases. For example,
6719 handling the following structure type definition when compiling for an
6720 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6723 struct S { int field1; long long field2:31; };
6725 Fortunately, there is a simple rule-of-thumb which can be
6726 used in such cases. When compiling for an i386/i486, GCC will allocate
6727 8 bytes for the structure shown above. It decides to do this based upon
6728 one simple rule for bit-field allocation. Quite simply, GCC allocates
6729 each "containing object" for each bit-field at the first (i.e. lowest
6730 addressed) legitimate alignment boundary (based upon the required
6731 minimum alignment for the declared type of the field) which it can
6732 possibly use, subject to the condition that there is still enough
6733 available space remaining in the containing object (when allocated at
6734 the selected point) to fully accommodate all of the bits of the
6735 bit-field itself. This simple rule makes it obvious why GCC allocates
6736 8 bytes for each object of the structure type shown above. When looking
6737 for a place to allocate the "containing object" for `field2', the
6738 compiler simply tries to allocate a 64-bit "containing object" at each
6739 successive 32-bit boundary (starting at zero) until it finds a place to
6740 allocate that 64- bit field such that at least 31 contiguous (and
6741 previously unallocated) bits remain within that selected 64 bit field.
6742 (As it turns out, for the example above, the compiler finds that it is
6743 OK to allocate the "containing object" 64-bit field at bit-offset zero
6744 within the structure type.) Here we attempt to work backwards from the
6745 limited set of facts we're given, and we try to deduce from those facts,
6746 where GCC must have believed that the containing object started (within
6747 the structure type). The value we deduce is then used (by the callers of
6748 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6749 for fields (both bit-fields and, in the case of DW_AT_location, regular
6752 /* Figure out the bit-distance from the start of the structure to the
6753 "deepest" bit of the bit-field. */
6754 deepest_bitpos = bitpos_int + field_size_in_bits;
6756 /* This is the tricky part. Use some fancy footwork to deduce where the
6757 lowest addressed bit of the containing object must be. */
6758 object_offset_in_bits
6759 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6761 /* Compute the offset of the containing object in "alignment units". */
6762 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6764 /* Compute the offset of the containing object in bytes. */
6765 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6767 return object_offset_in_bytes;
6770 /* The following routines define various Dwarf attributes and any data
6771 associated with them. */
6773 /* Add a location description attribute value to a DIE.
6775 This emits location attributes suitable for whole variables and
6776 whole parameters. Note that the location attributes for struct fields are
6777 generated by the routine `data_member_location_attribute' below. */
6780 add_AT_location_description (die, attr_kind, rtl)
6782 enum dwarf_attribute attr_kind;
6785 /* Handle a special case. If we are about to output a location descriptor
6786 for a variable or parameter which has been optimized out of existence,
6787 don't do that. A variable which has been optimized out
6788 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6789 Currently, in some rare cases, variables can have DECL_RTL values which
6790 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6791 elsewhere in the compiler. We treat such cases as if the variable(s) in
6792 question had been optimized out of existence. */
6794 if (is_pseudo_reg (rtl)
6795 || (GET_CODE (rtl) == MEM
6796 && is_pseudo_reg (XEXP (rtl, 0)))
6797 || (GET_CODE (rtl) == CONCAT
6798 && is_pseudo_reg (XEXP (rtl, 0))
6799 && is_pseudo_reg (XEXP (rtl, 1))))
6802 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6805 /* Attach the specialized form of location attribute used for data
6806 members of struct and union types. In the special case of a
6807 FIELD_DECL node which represents a bit-field, the "offset" part
6808 of this special location descriptor must indicate the distance
6809 in bytes from the lowest-addressed byte of the containing struct
6810 or union type to the lowest-addressed byte of the "containing
6811 object" for the bit-field. (See the `field_byte_offset' function
6812 above).. For any given bit-field, the "containing object" is a
6813 hypothetical object (of some integral or enum type) within which
6814 the given bit-field lives. The type of this hypothetical
6815 "containing object" is always the same as the declared type of
6816 the individual bit-field itself (for GCC anyway... the DWARF
6817 spec doesn't actually mandate this). Note that it is the size
6818 (in bytes) of the hypothetical "containing object" which will
6819 be given in the DW_AT_byte_size attribute for this bit-field.
6820 (See the `byte_size_attribute' function below.) It is also used
6821 when calculating the value of the DW_AT_bit_offset attribute.
6822 (See the `bit_offset_attribute' function below). */
6825 add_data_member_location_attribute (die, decl)
6826 register dw_die_ref die;
6829 register unsigned long offset;
6830 register dw_loc_descr_ref loc_descr;
6831 register enum dwarf_location_atom op;
6833 if (TREE_CODE (decl) == TREE_VEC)
6834 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6836 offset = field_byte_offset (decl);
6838 /* The DWARF2 standard says that we should assume that the structure address
6839 is already on the stack, so we can specify a structure field address
6840 by using DW_OP_plus_uconst. */
6842 #ifdef MIPS_DEBUGGING_INFO
6843 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6844 correctly. It works only if we leave the offset on the stack. */
6847 op = DW_OP_plus_uconst;
6850 loc_descr = new_loc_descr (op, offset, 0);
6851 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
6854 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6855 does not have a "location" either in memory or in a register. These
6856 things can arise in GNU C when a constant is passed as an actual parameter
6857 to an inlined function. They can also arise in C++ where declared
6858 constants do not necessarily get memory "homes". */
6861 add_const_value_attribute (die, rtl)
6862 register dw_die_ref die;
6865 switch (GET_CODE (rtl))
6868 /* Note that a CONST_INT rtx could represent either an integer or a
6869 floating-point constant. A CONST_INT is used whenever the constant
6870 will fit into a single word. In all such cases, the original mode
6871 of the constant value is wiped out, and the CONST_INT rtx is
6872 assigned VOIDmode. */
6873 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
6877 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6878 floating-point constant. A CONST_DOUBLE is used whenever the
6879 constant requires more than one word in order to be adequately
6880 represented. We output CONST_DOUBLEs as blocks. */
6882 register enum machine_mode mode = GET_MODE (rtl);
6884 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
6886 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
6890 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
6894 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
6898 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
6903 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
6910 add_AT_float (die, DW_AT_const_value, length, array);
6913 add_AT_long_long (die, DW_AT_const_value,
6914 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
6919 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
6925 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
6929 /* In cases where an inlined instance of an inline function is passed
6930 the address of an `auto' variable (which is local to the caller) we
6931 can get a situation where the DECL_RTL of the artificial local
6932 variable (for the inlining) which acts as a stand-in for the
6933 corresponding formal parameter (of the inline function) will look
6934 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6935 exactly a compile-time constant expression, but it isn't the address
6936 of the (artificial) local variable either. Rather, it represents the
6937 *value* which the artificial local variable always has during its
6938 lifetime. We currently have no way to represent such quasi-constant
6939 values in Dwarf, so for now we just punt and generate nothing. */
6943 /* No other kinds of rtx should be possible here. */
6949 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6950 data attribute for a variable or a parameter. We generate the
6951 DW_AT_const_value attribute only in those cases where the given variable
6952 or parameter does not have a true "location" either in memory or in a
6953 register. This can happen (for example) when a constant is passed as an
6954 actual argument in a call to an inline function. (It's possible that
6955 these things can crop up in other ways also.) Note that one type of
6956 constant value which can be passed into an inlined function is a constant
6957 pointer. This can happen for example if an actual argument in an inlined
6958 function call evaluates to a compile-time constant address. */
6961 add_location_or_const_value_attribute (die, decl)
6962 register dw_die_ref die;
6966 register tree declared_type;
6967 register tree passed_type;
6969 if (TREE_CODE (decl) == ERROR_MARK)
6972 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
6975 /* Here we have to decide where we are going to say the parameter "lives"
6976 (as far as the debugger is concerned). We only have a couple of
6977 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6979 DECL_RTL normally indicates where the parameter lives during most of the
6980 activation of the function. If optimization is enabled however, this
6981 could be either NULL or else a pseudo-reg. Both of those cases indicate
6982 that the parameter doesn't really live anywhere (as far as the code
6983 generation parts of GCC are concerned) during most of the function's
6984 activation. That will happen (for example) if the parameter is never
6985 referenced within the function.
6987 We could just generate a location descriptor here for all non-NULL
6988 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6989 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6990 where DECL_RTL is NULL or is a pseudo-reg.
6992 Note however that we can only get away with using DECL_INCOMING_RTL as
6993 a backup substitute for DECL_RTL in certain limited cases. In cases
6994 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
6995 we can be sure that the parameter was passed using the same type as it is
6996 declared to have within the function, and that its DECL_INCOMING_RTL
6997 points us to a place where a value of that type is passed.
6999 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7000 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7001 because in these cases DECL_INCOMING_RTL points us to a value of some
7002 type which is *different* from the type of the parameter itself. Thus,
7003 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7004 such cases, the debugger would end up (for example) trying to fetch a
7005 `float' from a place which actually contains the first part of a
7006 `double'. That would lead to really incorrect and confusing
7007 output at debug-time.
7009 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7010 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7011 are a couple of exceptions however. On little-endian machines we can
7012 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7013 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7014 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7015 when (on a little-endian machine) a non-prototyped function has a
7016 parameter declared to be of type `short' or `char'. In such cases,
7017 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7018 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7019 passed `int' value. If the debugger then uses that address to fetch
7020 a `short' or a `char' (on a little-endian machine) the result will be
7021 the correct data, so we allow for such exceptional cases below.
7023 Note that our goal here is to describe the place where the given formal
7024 parameter lives during most of the function's activation (i.e. between
7025 the end of the prologue and the start of the epilogue). We'll do that
7026 as best as we can. Note however that if the given formal parameter is
7027 modified sometime during the execution of the function, then a stack
7028 backtrace (at debug-time) will show the function as having been
7029 called with the *new* value rather than the value which was
7030 originally passed in. This happens rarely enough that it is not
7031 a major problem, but it *is* a problem, and I'd like to fix it.
7033 A future version of dwarf2out.c may generate two additional
7034 attributes for any given DW_TAG_formal_parameter DIE which will
7035 describe the "passed type" and the "passed location" for the
7036 given formal parameter in addition to the attributes we now
7037 generate to indicate the "declared type" and the "active
7038 location" for each parameter. This additional set of attributes
7039 could be used by debuggers for stack backtraces. Separately, note
7040 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7041 NULL also. This happens (for example) for inlined-instances of
7042 inline function formal parameters which are never referenced.
7043 This really shouldn't be happening. All PARM_DECL nodes should
7044 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7045 doesn't currently generate these values for inlined instances of
7046 inline function parameters, so when we see such cases, we are
7047 just out-of-luck for the time being (until integrate.c
7050 /* Use DECL_RTL as the "location" unless we find something better. */
7051 rtl = DECL_RTL (decl);
7053 if (TREE_CODE (decl) == PARM_DECL)
7055 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7057 declared_type = type_main_variant (TREE_TYPE (decl));
7058 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7060 /* This decl represents a formal parameter which was optimized out.
7061 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7062 all* cases where (rtl == NULL_RTX) just below. */
7063 if (declared_type == passed_type)
7064 rtl = DECL_INCOMING_RTL (decl);
7065 else if (! BYTES_BIG_ENDIAN
7066 && TREE_CODE (declared_type) == INTEGER_TYPE
7067 && TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
7068 rtl = DECL_INCOMING_RTL (decl);
7072 if (rtl == NULL_RTX)
7075 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7076 #ifdef LEAF_REG_REMAP
7078 leaf_renumber_regs_insn (rtl);
7081 switch (GET_CODE (rtl))
7084 /* The address of a variable that was optimized away; don't emit
7095 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7096 add_const_value_attribute (die, rtl);
7103 add_AT_location_description (die, DW_AT_location, rtl);
7111 /* Generate an DW_AT_name attribute given some string value to be included as
7112 the value of the attribute. */
7115 add_name_attribute (die, name_string)
7116 register dw_die_ref die;
7117 register char *name_string;
7119 if (name_string != NULL && *name_string != 0)
7120 add_AT_string (die, DW_AT_name, name_string);
7123 /* Given a tree node describing an array bound (either lower or upper) output
7124 a representation for that bound. */
7127 add_bound_info (subrange_die, bound_attr, bound)
7128 register dw_die_ref subrange_die;
7129 register enum dwarf_attribute bound_attr;
7130 register tree bound;
7132 register unsigned bound_value = 0;
7134 /* If this is an Ada unconstrained array type, then don't emit any debug
7135 info because the array bounds are unknown. They are parameterized when
7136 the type is instantiated. */
7137 if (contains_placeholder_p (bound))
7140 switch (TREE_CODE (bound))
7145 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7147 bound_value = TREE_INT_CST_LOW (bound);
7148 if (bound_attr == DW_AT_lower_bound
7149 && ((is_c_family () && bound_value == 0)
7150 || (is_fortran () && bound_value == 1)))
7151 /* use the default */;
7153 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7158 case NON_LVALUE_EXPR:
7159 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7163 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7164 access the upper bound values may be bogus. If they refer to a
7165 register, they may only describe how to get at these values at the
7166 points in the generated code right after they have just been
7167 computed. Worse yet, in the typical case, the upper bound values
7168 will not even *be* computed in the optimized code (though the
7169 number of elements will), so these SAVE_EXPRs are entirely
7170 bogus. In order to compensate for this fact, we check here to see
7171 if optimization is enabled, and if so, we don't add an attribute
7172 for the (unknown and unknowable) upper bound. This should not
7173 cause too much trouble for existing (stupid?) debuggers because
7174 they have to deal with empty upper bounds location descriptions
7175 anyway in order to be able to deal with incomplete array types.
7176 Of course an intelligent debugger (GDB?) should be able to
7177 comprehend that a missing upper bound specification in a array
7178 type used for a storage class `auto' local array variable
7179 indicates that the upper bound is both unknown (at compile- time)
7180 and unknowable (at run-time) due to optimization.
7182 We assume that a MEM rtx is safe because gcc wouldn't put the
7183 value there unless it was going to be used repeatedly in the
7184 function, i.e. for cleanups. */
7185 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7187 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7188 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7189 register rtx loc = SAVE_EXPR_RTL (bound);
7191 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7192 it references an outer function's frame. */
7194 if (GET_CODE (loc) == MEM)
7196 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7198 if (XEXP (loc, 0) != new_addr)
7199 loc = gen_rtx (MEM, GET_MODE (loc), new_addr);
7202 add_AT_flag (decl_die, DW_AT_artificial, 1);
7203 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7204 add_AT_location_description (decl_die, DW_AT_location, loc);
7205 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7208 /* Else leave out the attribute. */
7214 /* ??? These types of bounds can be created by the Ada front end,
7215 and it isn't clear how to emit debug info for them. */
7223 /* Note that the block of subscript information for an array type also
7224 includes information about the element type of type given array type. */
7227 add_subscript_info (type_die, type)
7228 register dw_die_ref type_die;
7231 #ifndef MIPS_DEBUGGING_INFO
7232 register unsigned dimension_number;
7234 register tree lower, upper;
7235 register dw_die_ref subrange_die;
7237 /* The GNU compilers represent multidimensional array types as sequences of
7238 one dimensional array types whose element types are themselves array
7239 types. Here we squish that down, so that each multidimensional array
7240 type gets only one array_type DIE in the Dwarf debugging info. The draft
7241 Dwarf specification say that we are allowed to do this kind of
7242 compression in C (because there is no difference between an array or
7243 arrays and a multidimensional array in C) but for other source languages
7244 (e.g. Ada) we probably shouldn't do this. */
7246 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7247 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7248 We work around this by disabling this feature. See also
7249 gen_array_type_die. */
7250 #ifndef MIPS_DEBUGGING_INFO
7251 for (dimension_number = 0;
7252 TREE_CODE (type) == ARRAY_TYPE;
7253 type = TREE_TYPE (type), dimension_number++)
7256 register tree domain = TYPE_DOMAIN (type);
7258 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7259 and (in GNU C only) variable bounds. Handle all three forms
7261 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7264 /* We have an array type with specified bounds. */
7265 lower = TYPE_MIN_VALUE (domain);
7266 upper = TYPE_MAX_VALUE (domain);
7268 /* define the index type. */
7269 if (TREE_TYPE (domain))
7271 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7272 TREE_TYPE field. We can't emit debug info for this
7273 because it is an unnamed integral type. */
7274 if (TREE_CODE (domain) == INTEGER_TYPE
7275 && TYPE_NAME (domain) == NULL_TREE
7276 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7277 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7280 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7284 /* ??? If upper is NULL, the array has unspecified length,
7285 but it does have a lower bound. This happens with Fortran
7287 Since the debugger is definitely going to need to know N
7288 to produce useful results, go ahead and output the lower
7289 bound solo, and hope the debugger can cope. */
7291 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7293 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7296 /* We have an array type with an unspecified length. The DWARF-2
7297 spec does not say how to handle this; let's just leave out the
7302 #ifndef MIPS_DEBUGGING_INFO
7308 add_byte_size_attribute (die, tree_node)
7310 register tree tree_node;
7312 register unsigned size;
7314 switch (TREE_CODE (tree_node))
7322 case QUAL_UNION_TYPE:
7323 size = int_size_in_bytes (tree_node);
7326 /* For a data member of a struct or union, the DW_AT_byte_size is
7327 generally given as the number of bytes normally allocated for an
7328 object of the *declared* type of the member itself. This is true
7329 even for bit-fields. */
7330 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7336 /* Note that `size' might be -1 when we get to this point. If it is, that
7337 indicates that the byte size of the entity in question is variable. We
7338 have no good way of expressing this fact in Dwarf at the present time,
7339 so just let the -1 pass on through. */
7341 add_AT_unsigned (die, DW_AT_byte_size, size);
7344 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7345 which specifies the distance in bits from the highest order bit of the
7346 "containing object" for the bit-field to the highest order bit of the
7349 For any given bit-field, the "containing object" is a hypothetical
7350 object (of some integral or enum type) within which the given bit-field
7351 lives. The type of this hypothetical "containing object" is always the
7352 same as the declared type of the individual bit-field itself. The
7353 determination of the exact location of the "containing object" for a
7354 bit-field is rather complicated. It's handled by the
7355 `field_byte_offset' function (above).
7357 Note that it is the size (in bytes) of the hypothetical "containing object"
7358 which will be given in the DW_AT_byte_size attribute for this bit-field.
7359 (See `byte_size_attribute' above). */
7362 add_bit_offset_attribute (die, decl)
7363 register dw_die_ref die;
7366 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7367 register tree type = DECL_BIT_FIELD_TYPE (decl);
7368 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7369 register unsigned bitpos_int;
7370 register unsigned highest_order_object_bit_offset;
7371 register unsigned highest_order_field_bit_offset;
7372 register unsigned bit_offset;
7374 /* Must be a field and a bit field. */
7376 || TREE_CODE (decl) != FIELD_DECL)
7379 /* We can't yet handle bit-fields whose offsets are variable, so if we
7380 encounter such things, just return without generating any attribute
7382 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7385 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7387 /* Note that the bit offset is always the distance (in bits) from the
7388 highest-order bit of the "containing object" to the highest-order bit of
7389 the bit-field itself. Since the "high-order end" of any object or field
7390 is different on big-endian and little-endian machines, the computation
7391 below must take account of these differences. */
7392 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7393 highest_order_field_bit_offset = bitpos_int;
7395 if (! BYTES_BIG_ENDIAN)
7397 highest_order_field_bit_offset
7398 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7400 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7404 = (! BYTES_BIG_ENDIAN
7405 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7406 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7408 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7411 /* For a FIELD_DECL node which represents a bit field, output an attribute
7412 which specifies the length in bits of the given field. */
7415 add_bit_size_attribute (die, decl)
7416 register dw_die_ref die;
7419 /* Must be a field and a bit field. */
7420 if (TREE_CODE (decl) != FIELD_DECL
7421 || ! DECL_BIT_FIELD_TYPE (decl))
7423 add_AT_unsigned (die, DW_AT_bit_size,
7424 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7427 /* If the compiled language is ANSI C, then add a 'prototyped'
7428 attribute, if arg types are given for the parameters of a function. */
7431 add_prototyped_attribute (die, func_type)
7432 register dw_die_ref die;
7433 register tree func_type;
7435 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7436 && TYPE_ARG_TYPES (func_type) != NULL)
7437 add_AT_flag (die, DW_AT_prototyped, 1);
7441 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7442 by looking in either the type declaration or object declaration
7446 add_abstract_origin_attribute (die, origin)
7447 register dw_die_ref die;
7448 register tree origin;
7450 dw_die_ref origin_die = NULL;
7451 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7452 origin_die = lookup_decl_die (origin);
7453 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7454 origin_die = lookup_type_die (origin);
7456 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7459 /* We do not currently support the pure_virtual attribute. */
7462 add_pure_or_virtual_attribute (die, func_decl)
7463 register dw_die_ref die;
7464 register tree func_decl;
7466 if (DECL_VINDEX (func_decl))
7468 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7469 add_AT_loc (die, DW_AT_vtable_elem_location,
7470 new_loc_descr (DW_OP_constu,
7471 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7474 /* GNU extension: Record what type this method came from originally. */
7475 if (debug_info_level > DINFO_LEVEL_TERSE)
7476 add_AT_die_ref (die, DW_AT_containing_type,
7477 lookup_type_die (DECL_CONTEXT (func_decl)));
7481 /* Add source coordinate attributes for the given decl. */
7484 add_src_coords_attributes (die, decl)
7485 register dw_die_ref die;
7488 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7490 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7491 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7494 /* Add an DW_AT_name attribute and source coordinate attribute for the
7495 given decl, but only if it actually has a name. */
7498 add_name_and_src_coords_attributes (die, decl)
7499 register dw_die_ref die;
7502 register tree decl_name;
7504 decl_name = DECL_NAME (decl);
7505 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7507 add_name_attribute (die, dwarf2_name (decl, 0));
7508 add_src_coords_attributes (die, decl);
7509 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7510 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7511 add_AT_string (die, DW_AT_MIPS_linkage_name,
7512 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7516 /* Push a new declaration scope. */
7519 push_decl_scope (scope)
7522 tree containing_scope;
7525 /* Make room in the decl_scope_table, if necessary. */
7526 if (decl_scope_table_allocated == decl_scope_depth)
7528 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7530 = (decl_scope_node *) xrealloc (decl_scope_table,
7531 (decl_scope_table_allocated
7532 * sizeof (decl_scope_node)));
7535 decl_scope_table[decl_scope_depth].scope = scope;
7537 /* Sometimes, while recursively emitting subtypes within a class type,
7538 we end up recuring on a subtype at a higher level then the current
7539 subtype. In such a case, we need to search the decl_scope_table to
7540 find the parent of this subtype. */
7542 if (TREE_CODE_CLASS (TREE_CODE (scope)) == 't')
7543 containing_scope = TYPE_CONTEXT (scope);
7545 containing_scope = NULL_TREE;
7547 /* The normal case. */
7548 if (decl_scope_depth == 0
7549 || containing_scope == NULL_TREE
7550 /* Ignore namespaces for the moment. */
7551 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7552 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7553 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7556 /* We need to search for the containing_scope. */
7557 for (i = 0; i < decl_scope_depth; i++)
7558 if (decl_scope_table[i].scope == containing_scope)
7561 if (i == decl_scope_depth)
7564 decl_scope_table[decl_scope_depth].previous = i;
7570 /* Return the DIE for the scope that immediately contains this declaration. */
7573 scope_die_for (t, context_die)
7575 register dw_die_ref context_die;
7577 register dw_die_ref scope_die = NULL;
7578 register tree containing_scope;
7581 /* Walk back up the declaration tree looking for a place to define
7583 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7584 containing_scope = TYPE_CONTEXT (t);
7585 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7586 containing_scope = decl_class_context (t);
7588 containing_scope = DECL_CONTEXT (t);
7590 /* Ignore namespaces for the moment. */
7591 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7592 containing_scope = NULL_TREE;
7594 /* Function-local tags and functions get stuck in limbo until they are
7595 fixed up by decls_for_scope. */
7596 if (context_die == NULL && containing_scope != NULL_TREE
7597 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7600 if (containing_scope == NULL_TREE)
7601 scope_die = comp_unit_die;
7604 for (i = decl_scope_depth - 1, scope_die = context_die;
7605 i >= 0 && decl_scope_table[i].scope != containing_scope;
7606 (scope_die = scope_die->die_parent,
7607 i = decl_scope_table[i].previous))
7610 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7611 does it try to handle types defined by TYPE_DECLs. Such types
7612 thus have an incorrect TYPE_CONTEXT, which points to the block
7613 they were originally defined in, instead of the current block
7614 created by function inlining. We try to detect that here and
7617 if (i < 0 && scope_die == comp_unit_die
7618 && TREE_CODE (containing_scope) == BLOCK
7619 && is_tagged_type (t)
7620 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7621 == containing_scope))
7623 scope_die = context_die;
7624 /* Since the checks below are no longer applicable. */
7630 if (scope_die != comp_unit_die
7631 || TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7633 if (debug_info_level > DINFO_LEVEL_TERSE
7634 && !TREE_ASM_WRITTEN (containing_scope))
7642 /* Pop a declaration scope. */
7646 if (decl_scope_depth <= 0)
7651 /* Many forms of DIEs require a "type description" attribute. This
7652 routine locates the proper "type descriptor" die for the type given
7653 by 'type', and adds an DW_AT_type attribute below the given die. */
7656 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7657 register dw_die_ref object_die;
7659 register int decl_const;
7660 register int decl_volatile;
7661 register dw_die_ref context_die;
7663 register enum tree_code code = TREE_CODE (type);
7664 register dw_die_ref type_die = NULL;
7666 /* ??? If this type is an unnamed subrange type of an integral or
7667 floating-point type, use the inner type. This is because we have no
7668 support for unnamed types in base_type_die. This can happen if this is
7669 an Ada subrange type. Correct solution is emit a subrange type die. */
7670 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7671 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7672 type = TREE_TYPE (type), code = TREE_CODE (type);
7674 if (code == ERROR_MARK)
7677 /* Handle a special case. For functions whose return type is void, we
7678 generate *no* type attribute. (Note that no object may have type
7679 `void', so this only applies to function return types). */
7680 if (code == VOID_TYPE)
7683 type_die = modified_type_die (type,
7684 decl_const || TYPE_READONLY (type),
7685 decl_volatile || TYPE_VOLATILE (type),
7687 if (type_die != NULL)
7688 add_AT_die_ref (object_die, DW_AT_type, type_die);
7691 /* Given a tree pointer to a struct, class, union, or enum type node, return
7692 a pointer to the (string) tag name for the given type, or zero if the type
7693 was declared without a tag. */
7699 register char *name = 0;
7701 if (TYPE_NAME (type) != 0)
7703 register tree t = 0;
7705 /* Find the IDENTIFIER_NODE for the type name. */
7706 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7707 t = TYPE_NAME (type);
7709 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7710 a TYPE_DECL node, regardless of whether or not a `typedef' was
7712 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7713 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7714 t = DECL_NAME (TYPE_NAME (type));
7716 /* Now get the name as a string, or invent one. */
7718 name = IDENTIFIER_POINTER (t);
7721 return (name == 0 || *name == '\0') ? 0 : name;
7724 /* Return the type associated with a data member, make a special check
7725 for bit field types. */
7728 member_declared_type (member)
7729 register tree member;
7731 return (DECL_BIT_FIELD_TYPE (member)
7732 ? DECL_BIT_FIELD_TYPE (member)
7733 : TREE_TYPE (member));
7736 /* Get the decl's label, as described by its RTL. This may be different
7737 from the DECL_NAME name used in the source file. */
7741 decl_start_label (decl)
7746 x = DECL_RTL (decl);
7747 if (GET_CODE (x) != MEM)
7751 if (GET_CODE (x) != SYMBOL_REF)
7754 fnname = XSTR (x, 0);
7759 /* These routines generate the internal representation of the DIE's for
7760 the compilation unit. Debugging information is collected by walking
7761 the declaration trees passed in from dwarf2out_decl(). */
7764 gen_array_type_die (type, context_die)
7766 register dw_die_ref context_die;
7768 register dw_die_ref scope_die = scope_die_for (type, context_die);
7769 register dw_die_ref array_die;
7770 register tree element_type;
7772 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7773 the inner array type comes before the outer array type. Thus we must
7774 call gen_type_die before we call new_die. See below also. */
7775 #ifdef MIPS_DEBUGGING_INFO
7776 gen_type_die (TREE_TYPE (type), context_die);
7779 array_die = new_die (DW_TAG_array_type, scope_die);
7782 /* We default the array ordering. SDB will probably do
7783 the right things even if DW_AT_ordering is not present. It's not even
7784 an issue until we start to get into multidimensional arrays anyway. If
7785 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7786 then we'll have to put the DW_AT_ordering attribute back in. (But if
7787 and when we find out that we need to put these in, we will only do so
7788 for multidimensional arrays. */
7789 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
7792 #ifdef MIPS_DEBUGGING_INFO
7793 /* The SGI compilers handle arrays of unknown bound by setting
7794 AT_declaration and not emitting any subrange DIEs. */
7795 if (! TYPE_DOMAIN (type))
7796 add_AT_unsigned (array_die, DW_AT_declaration, 1);
7799 add_subscript_info (array_die, type);
7801 equate_type_number_to_die (type, array_die);
7803 /* Add representation of the type of the elements of this array type. */
7804 element_type = TREE_TYPE (type);
7806 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7807 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7808 We work around this by disabling this feature. See also
7809 add_subscript_info. */
7810 #ifndef MIPS_DEBUGGING_INFO
7811 while (TREE_CODE (element_type) == ARRAY_TYPE)
7812 element_type = TREE_TYPE (element_type);
7814 gen_type_die (element_type, context_die);
7817 add_type_attribute (array_die, element_type, 0, 0, context_die);
7821 gen_set_type_die (type, context_die)
7823 register dw_die_ref context_die;
7825 register dw_die_ref type_die
7826 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
7828 equate_type_number_to_die (type, type_die);
7829 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
7834 gen_entry_point_die (decl, context_die)
7836 register dw_die_ref context_die;
7838 register tree origin = decl_ultimate_origin (decl);
7839 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
7841 add_abstract_origin_attribute (decl_die, origin);
7844 add_name_and_src_coords_attributes (decl_die, decl);
7845 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
7849 if (DECL_ABSTRACT (decl))
7850 equate_decl_number_to_die (decl, decl_die);
7852 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
7856 /* Remember a type in the pending_types_list. */
7862 if (pending_types == pending_types_allocated)
7864 pending_types_allocated += PENDING_TYPES_INCREMENT;
7866 = (tree *) xrealloc (pending_types_list,
7867 sizeof (tree) * pending_types_allocated);
7870 pending_types_list[pending_types++] = type;
7873 /* Output any pending types (from the pending_types list) which we can output
7874 now (taking into account the scope that we are working on now).
7876 For each type output, remove the given type from the pending_types_list
7877 *before* we try to output it. */
7880 output_pending_types_for_scope (context_die)
7881 register dw_die_ref context_die;
7885 while (pending_types)
7888 type = pending_types_list[pending_types];
7889 gen_type_die (type, context_die);
7890 if (!TREE_ASM_WRITTEN (type))
7895 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7898 gen_inlined_enumeration_type_die (type, context_die)
7900 register dw_die_ref context_die;
7902 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
7903 scope_die_for (type, context_die));
7905 if (!TREE_ASM_WRITTEN (type))
7907 add_abstract_origin_attribute (type_die, type);
7910 /* Generate a DIE to represent an inlined instance of a structure type. */
7913 gen_inlined_structure_type_die (type, context_die)
7915 register dw_die_ref context_die;
7917 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
7918 scope_die_for (type, context_die));
7920 if (!TREE_ASM_WRITTEN (type))
7922 add_abstract_origin_attribute (type_die, type);
7925 /* Generate a DIE to represent an inlined instance of a union type. */
7928 gen_inlined_union_type_die (type, context_die)
7930 register dw_die_ref context_die;
7932 register dw_die_ref type_die = new_die (DW_TAG_union_type,
7933 scope_die_for (type, context_die));
7935 if (!TREE_ASM_WRITTEN (type))
7937 add_abstract_origin_attribute (type_die, type);
7940 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7941 include all of the information about the enumeration values also. Each
7942 enumerated type name/value is listed as a child of the enumerated type
7946 gen_enumeration_type_die (type, context_die)
7948 register dw_die_ref context_die;
7950 register dw_die_ref type_die = lookup_type_die (type);
7952 if (type_die == NULL)
7954 type_die = new_die (DW_TAG_enumeration_type,
7955 scope_die_for (type, context_die));
7956 equate_type_number_to_die (type, type_die);
7957 add_name_attribute (type_die, type_tag (type));
7959 else if (! TYPE_SIZE (type))
7962 remove_AT (type_die, DW_AT_declaration);
7964 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7965 given enum type is incomplete, do not generate the DW_AT_byte_size
7966 attribute or the DW_AT_element_list attribute. */
7967 if (TYPE_SIZE (type))
7971 TREE_ASM_WRITTEN (type) = 1;
7972 add_byte_size_attribute (type_die, type);
7973 if (TYPE_STUB_DECL (type) != NULL_TREE)
7974 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
7976 /* If the first reference to this type was as the return type of an
7977 inline function, then it may not have a parent. Fix this now. */
7978 if (type_die->die_parent == NULL)
7979 add_child_die (scope_die_for (type, context_die), type_die);
7981 for (link = TYPE_FIELDS (type);
7982 link != NULL; link = TREE_CHAIN (link))
7984 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
7986 add_name_attribute (enum_die,
7987 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
7988 add_AT_unsigned (enum_die, DW_AT_const_value,
7989 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
7993 add_AT_flag (type_die, DW_AT_declaration, 1);
7997 /* Generate a DIE to represent either a real live formal parameter decl or to
7998 represent just the type of some formal parameter position in some function
8001 Note that this routine is a bit unusual because its argument may be a
8002 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8003 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8004 node. If it's the former then this function is being called to output a
8005 DIE to represent a formal parameter object (or some inlining thereof). If
8006 it's the latter, then this function is only being called to output a
8007 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8008 argument type of some subprogram type. */
8011 gen_formal_parameter_die (node, context_die)
8013 register dw_die_ref context_die;
8015 register dw_die_ref parm_die
8016 = new_die (DW_TAG_formal_parameter, context_die);
8017 register tree origin;
8019 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8022 origin = decl_ultimate_origin (node);
8024 add_abstract_origin_attribute (parm_die, origin);
8027 add_name_and_src_coords_attributes (parm_die, node);
8028 add_type_attribute (parm_die, TREE_TYPE (node),
8029 TREE_READONLY (node),
8030 TREE_THIS_VOLATILE (node),
8032 if (DECL_ARTIFICIAL (node))
8033 add_AT_flag (parm_die, DW_AT_artificial, 1);
8036 equate_decl_number_to_die (node, parm_die);
8037 if (! DECL_ABSTRACT (node))
8038 add_location_or_const_value_attribute (parm_die, node);
8043 /* We were called with some kind of a ..._TYPE node. */
8044 add_type_attribute (parm_die, node, 0, 0, context_die);
8054 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8055 at the end of an (ANSI prototyped) formal parameters list. */
8058 gen_unspecified_parameters_die (decl_or_type, context_die)
8059 register tree decl_or_type;
8060 register dw_die_ref context_die;
8062 new_die (DW_TAG_unspecified_parameters, context_die);
8065 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8066 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8067 parameters as specified in some function type specification (except for
8068 those which appear as part of a function *definition*).
8070 Note we must be careful here to output all of the parameter DIEs before*
8071 we output any DIEs needed to represent the types of the formal parameters.
8072 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8073 non-parameter DIE it sees ends the formal parameter list. */
8076 gen_formal_types_die (function_or_method_type, context_die)
8077 register tree function_or_method_type;
8078 register dw_die_ref context_die;
8081 register tree formal_type = NULL;
8082 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8085 /* In the case where we are generating a formal types list for a C++
8086 non-static member function type, skip over the first thing on the
8087 TYPE_ARG_TYPES list because it only represents the type of the hidden
8088 `this pointer'. The debugger should be able to figure out (without
8089 being explicitly told) that this non-static member function type takes a
8090 `this pointer' and should be able to figure what the type of that hidden
8091 parameter is from the DW_AT_member attribute of the parent
8092 DW_TAG_subroutine_type DIE. */
8093 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8094 first_parm_type = TREE_CHAIN (first_parm_type);
8097 /* Make our first pass over the list of formal parameter types and output a
8098 DW_TAG_formal_parameter DIE for each one. */
8099 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8101 register dw_die_ref parm_die;
8103 formal_type = TREE_VALUE (link);
8104 if (formal_type == void_type_node)
8107 /* Output a (nameless) DIE to represent the formal parameter itself. */
8108 parm_die = gen_formal_parameter_die (formal_type, context_die);
8109 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8110 && link == first_parm_type)
8111 add_AT_flag (parm_die, DW_AT_artificial, 1);
8114 /* If this function type has an ellipsis, add a
8115 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8116 if (formal_type != void_type_node)
8117 gen_unspecified_parameters_die (function_or_method_type, context_die);
8119 /* Make our second (and final) pass over the list of formal parameter types
8120 and output DIEs to represent those types (as necessary). */
8121 for (link = TYPE_ARG_TYPES (function_or_method_type);
8123 link = TREE_CHAIN (link))
8125 formal_type = TREE_VALUE (link);
8126 if (formal_type == void_type_node)
8129 gen_type_die (formal_type, context_die);
8133 /* Generate a DIE to represent a declared function (either file-scope or
8137 gen_subprogram_die (decl, context_die)
8139 register dw_die_ref context_die;
8141 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8142 register tree origin = decl_ultimate_origin (decl);
8143 register dw_die_ref subr_die;
8144 register rtx fp_reg;
8145 register tree fn_arg_types;
8146 register tree outer_scope;
8147 register dw_die_ref old_die = lookup_decl_die (decl);
8148 register int declaration
8149 = (current_function_decl != decl
8151 && (context_die->die_tag == DW_TAG_structure_type
8152 || context_die->die_tag == DW_TAG_union_type)));
8156 subr_die = new_die (DW_TAG_subprogram, context_die);
8157 add_abstract_origin_attribute (subr_die, origin);
8159 else if (old_die && DECL_ABSTRACT (decl)
8160 && get_AT_unsigned (old_die, DW_AT_inline))
8162 /* This must be a redefinition of an extern inline function.
8163 We can just reuse the old die here. */
8166 /* Clear out the inlined attribute and parm types. */
8167 remove_AT (subr_die, DW_AT_inline);
8168 remove_children (subr_die);
8172 register unsigned file_index
8173 = lookup_filename (DECL_SOURCE_FILE (decl));
8175 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8178 /* If the definition comes from the same place as the declaration,
8179 maybe use the old DIE. We always want the DIE for this function
8180 that has the *_pc attributes to be under comp_unit_die so the
8181 debugger can find it. For inlines, that is the concrete instance,
8182 so we can use the old DIE here. For non-inline methods, we want a
8183 specification DIE at toplevel, so we need a new DIE. For local
8184 class methods, this does not apply. */
8185 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8186 || context_die == NULL)
8187 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8188 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8189 == DECL_SOURCE_LINE (decl)))
8193 /* Clear out the declaration attribute and the parm types. */
8194 remove_AT (subr_die, DW_AT_declaration);
8195 remove_children (subr_die);
8199 subr_die = new_die (DW_TAG_subprogram, context_die);
8200 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8201 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8202 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8203 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8204 != DECL_SOURCE_LINE (decl))
8206 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8211 register dw_die_ref scope_die;
8213 if (DECL_CONTEXT (decl))
8214 scope_die = scope_die_for (decl, context_die);
8216 /* Don't put block extern declarations under comp_unit_die. */
8217 scope_die = context_die;
8219 subr_die = new_die (DW_TAG_subprogram, scope_die);
8221 if (TREE_PUBLIC (decl))
8222 add_AT_flag (subr_die, DW_AT_external, 1);
8224 add_name_and_src_coords_attributes (subr_die, decl);
8225 if (debug_info_level > DINFO_LEVEL_TERSE)
8227 register tree type = TREE_TYPE (decl);
8229 add_prototyped_attribute (subr_die, type);
8230 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8233 add_pure_or_virtual_attribute (subr_die, decl);
8234 if (DECL_ARTIFICIAL (decl))
8235 add_AT_flag (subr_die, DW_AT_artificial, 1);
8236 if (TREE_PROTECTED (decl))
8237 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8238 else if (TREE_PRIVATE (decl))
8239 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8244 add_AT_flag (subr_die, DW_AT_declaration, 1);
8246 /* The first time we see a member function, it is in the context of
8247 the class to which it belongs. We make sure of this by emitting
8248 the class first. The next time is the definition, which is
8249 handled above. The two may come from the same source text. */
8250 if (DECL_CONTEXT (decl))
8251 equate_decl_number_to_die (decl, subr_die);
8253 else if (DECL_ABSTRACT (decl))
8255 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8256 but not for extern inline functions. We can't get this completely
8257 correct because information about whether the function was declared
8258 inline is not saved anywhere. */
8259 if (DECL_DEFER_OUTPUT (decl))
8261 if (DECL_INLINE (decl))
8262 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8264 add_AT_unsigned (subr_die, DW_AT_inline,
8265 DW_INL_declared_not_inlined);
8267 else if (DECL_INLINE (decl))
8268 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8272 equate_decl_number_to_die (decl, subr_die);
8274 else if (!DECL_EXTERNAL (decl))
8276 if (origin == NULL_TREE)
8277 equate_decl_number_to_die (decl, subr_die);
8279 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8280 current_funcdef_number);
8281 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8282 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8283 current_funcdef_number);
8284 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8286 add_pubname (decl, subr_die);
8287 add_arange (decl, subr_die);
8289 #ifdef MIPS_DEBUGGING_INFO
8290 /* Add a reference to the FDE for this routine. */
8291 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8294 /* Define the "frame base" location for this routine. We use the
8295 frame pointer or stack pointer registers, since the RTL for local
8296 variables is relative to one of them. */
8298 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8299 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8302 /* ??? This fails for nested inline functions, because context_display
8303 is not part of the state saved/restored for inline functions. */
8304 if (current_function_needs_context)
8305 add_AT_location_description (subr_die, DW_AT_static_link,
8306 lookup_static_chain (decl));
8310 /* Now output descriptions of the arguments for this function. This gets
8311 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8312 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8313 `...' at the end of the formal parameter list. In order to find out if
8314 there was a trailing ellipsis or not, we must instead look at the type
8315 associated with the FUNCTION_DECL. This will be a node of type
8316 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8317 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8318 an ellipsis at the end. */
8319 push_decl_scope (decl);
8321 /* In the case where we are describing a mere function declaration, all we
8322 need to do here (and all we *can* do here) is to describe the *types* of
8323 its formal parameters. */
8324 if (debug_info_level <= DINFO_LEVEL_TERSE)
8326 else if (declaration)
8327 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8330 /* Generate DIEs to represent all known formal parameters */
8331 register tree arg_decls = DECL_ARGUMENTS (decl);
8334 /* When generating DIEs, generate the unspecified_parameters DIE
8335 instead if we come across the arg "__builtin_va_alist" */
8336 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8337 if (TREE_CODE (parm) == PARM_DECL)
8339 if (DECL_NAME (parm)
8340 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8341 "__builtin_va_alist"))
8342 gen_unspecified_parameters_die (parm, subr_die);
8344 gen_decl_die (parm, subr_die);
8347 /* Decide whether we need a unspecified_parameters DIE at the end.
8348 There are 2 more cases to do this for: 1) the ansi ... declaration -
8349 this is detectable when the end of the arg list is not a
8350 void_type_node 2) an unprototyped function declaration (not a
8351 definition). This just means that we have no info about the
8352 parameters at all. */
8353 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8354 if (fn_arg_types != NULL)
8356 /* this is the prototyped case, check for ... */
8357 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8358 gen_unspecified_parameters_die (decl, subr_die);
8360 else if (DECL_INITIAL (decl) == NULL_TREE)
8361 gen_unspecified_parameters_die (decl, subr_die);
8364 /* Output Dwarf info for all of the stuff within the body of the function
8365 (if it has one - it may be just a declaration). */
8366 outer_scope = DECL_INITIAL (decl);
8368 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8369 node created to represent a function. This outermost BLOCK actually
8370 represents the outermost binding contour for the function, i.e. the
8371 contour in which the function's formal parameters and labels get
8372 declared. Curiously, it appears that the front end doesn't actually
8373 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8374 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8375 list for the function instead.) The BLOCK_VARS list for the
8376 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8377 the function however, and we output DWARF info for those in
8378 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8379 node representing the function's outermost pair of curly braces, and
8380 any blocks used for the base and member initializers of a C++
8381 constructor function. */
8382 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8384 current_function_has_inlines = 0;
8385 decls_for_scope (outer_scope, subr_die, 0);
8387 #if 0 && defined (MIPS_DEBUGGING_INFO)
8388 if (current_function_has_inlines)
8390 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8391 if (! comp_unit_has_inlines)
8393 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8394 comp_unit_has_inlines = 1;
8403 /* Generate a DIE to represent a declared data object. */
8406 gen_variable_die (decl, context_die)
8408 register dw_die_ref context_die;
8410 register tree origin = decl_ultimate_origin (decl);
8411 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8413 dw_die_ref old_die = lookup_decl_die (decl);
8415 = (DECL_EXTERNAL (decl)
8416 || current_function_decl != decl_function_context (decl)
8417 || context_die->die_tag == DW_TAG_structure_type
8418 || context_die->die_tag == DW_TAG_union_type);
8421 add_abstract_origin_attribute (var_die, origin);
8422 /* Loop unrolling can create multiple blocks that refer to the same
8423 static variable, so we must test for the DW_AT_declaration flag. */
8424 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8425 copy decls and set the DECL_ABSTRACT flag on them instead of
8427 else if (old_die && TREE_STATIC (decl)
8428 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8430 /* ??? This is an instantiation of a C++ class level static. */
8431 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8432 if (DECL_NAME (decl))
8434 register unsigned file_index
8435 = lookup_filename (DECL_SOURCE_FILE (decl));
8437 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8438 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8440 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8441 != DECL_SOURCE_LINE (decl))
8443 add_AT_unsigned (var_die, DW_AT_decl_line,
8444 DECL_SOURCE_LINE (decl));
8449 add_name_and_src_coords_attributes (var_die, decl);
8450 add_type_attribute (var_die, TREE_TYPE (decl),
8451 TREE_READONLY (decl),
8452 TREE_THIS_VOLATILE (decl), context_die);
8454 if (TREE_PUBLIC (decl))
8455 add_AT_flag (var_die, DW_AT_external, 1);
8457 if (DECL_ARTIFICIAL (decl))
8458 add_AT_flag (var_die, DW_AT_artificial, 1);
8460 if (TREE_PROTECTED (decl))
8461 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8463 else if (TREE_PRIVATE (decl))
8464 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8468 add_AT_flag (var_die, DW_AT_declaration, 1);
8470 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8471 equate_decl_number_to_die (decl, var_die);
8473 if (! declaration && ! DECL_ABSTRACT (decl))
8475 equate_decl_number_to_die (decl, var_die);
8476 add_location_or_const_value_attribute (var_die, decl);
8477 add_pubname (decl, var_die);
8481 /* Generate a DIE to represent a label identifier. */
8484 gen_label_die (decl, context_die)
8486 register dw_die_ref context_die;
8488 register tree origin = decl_ultimate_origin (decl);
8489 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8491 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8492 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8495 add_abstract_origin_attribute (lbl_die, origin);
8497 add_name_and_src_coords_attributes (lbl_die, decl);
8499 if (DECL_ABSTRACT (decl))
8500 equate_decl_number_to_die (decl, lbl_die);
8503 insn = DECL_RTL (decl);
8504 if (GET_CODE (insn) == CODE_LABEL)
8506 /* When optimization is enabled (via -O) some parts of the compiler
8507 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8508 represent source-level labels which were explicitly declared by
8509 the user. This really shouldn't be happening though, so catch
8510 it if it ever does happen. */
8511 if (INSN_DELETED_P (insn))
8514 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8515 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8516 (unsigned) INSN_UID (insn));
8517 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8522 /* Generate a DIE for a lexical block. */
8525 gen_lexical_block_die (stmt, context_die, depth)
8527 register dw_die_ref context_die;
8530 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8531 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8533 if (! BLOCK_ABSTRACT (stmt))
8535 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8537 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8538 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8539 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8542 push_decl_scope (stmt);
8543 decls_for_scope (stmt, stmt_die, depth);
8547 /* Generate a DIE for an inlined subprogram. */
8550 gen_inlined_subroutine_die (stmt, context_die, depth)
8552 register dw_die_ref context_die;
8555 if (! BLOCK_ABSTRACT (stmt))
8557 register dw_die_ref subr_die
8558 = new_die (DW_TAG_inlined_subroutine, context_die);
8559 register tree decl = block_ultimate_origin (stmt);
8560 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8562 add_abstract_origin_attribute (subr_die, decl);
8563 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8565 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8566 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8567 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8568 push_decl_scope (decl);
8569 decls_for_scope (stmt, subr_die, depth);
8571 current_function_has_inlines = 1;
8575 /* Generate a DIE for a field in a record, or structure. */
8578 gen_field_die (decl, context_die)
8580 register dw_die_ref context_die;
8582 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8584 add_name_and_src_coords_attributes (decl_die, decl);
8585 add_type_attribute (decl_die, member_declared_type (decl),
8586 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8589 /* If this is a bit field... */
8590 if (DECL_BIT_FIELD_TYPE (decl))
8592 add_byte_size_attribute (decl_die, decl);
8593 add_bit_size_attribute (decl_die, decl);
8594 add_bit_offset_attribute (decl_die, decl);
8597 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8598 add_data_member_location_attribute (decl_die, decl);
8600 if (DECL_ARTIFICIAL (decl))
8601 add_AT_flag (decl_die, DW_AT_artificial, 1);
8603 if (TREE_PROTECTED (decl))
8604 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8606 else if (TREE_PRIVATE (decl))
8607 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8611 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8612 Use modified_type_die instead.
8613 We keep this code here just in case these types of DIEs may be needed to
8614 represent certain things in other languages (e.g. Pascal) someday. */
8616 gen_pointer_type_die (type, context_die)
8618 register dw_die_ref context_die;
8620 register dw_die_ref ptr_die
8621 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8623 equate_type_number_to_die (type, ptr_die);
8624 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8625 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8628 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8629 Use modified_type_die instead.
8630 We keep this code here just in case these types of DIEs may be needed to
8631 represent certain things in other languages (e.g. Pascal) someday. */
8633 gen_reference_type_die (type, context_die)
8635 register dw_die_ref context_die;
8637 register dw_die_ref ref_die
8638 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8640 equate_type_number_to_die (type, ref_die);
8641 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8642 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8646 /* Generate a DIE for a pointer to a member type. */
8648 gen_ptr_to_mbr_type_die (type, context_die)
8650 register dw_die_ref context_die;
8652 register dw_die_ref ptr_die
8653 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8655 equate_type_number_to_die (type, ptr_die);
8656 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8657 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8658 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8661 /* Generate the DIE for the compilation unit. */
8664 gen_compile_unit_die (main_input_filename)
8665 register char *main_input_filename;
8668 char *wd = getpwd ();
8670 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8671 add_name_attribute (comp_unit_die, main_input_filename);
8674 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8676 sprintf (producer, "%s %s", language_string, version_string);
8678 #ifdef MIPS_DEBUGGING_INFO
8679 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8680 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8681 not appear in the producer string, the debugger reaches the conclusion
8682 that the object file is stripped and has no debugging information.
8683 To get the MIPS/SGI debugger to believe that there is debugging
8684 information in the object file, we add a -g to the producer string. */
8685 if (debug_info_level > DINFO_LEVEL_TERSE)
8686 strcat (producer, " -g");
8689 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8691 if (strcmp (language_string, "GNU C++") == 0)
8692 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8694 else if (strcmp (language_string, "GNU Ada") == 0)
8695 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8697 else if (strcmp (language_string, "GNU F77") == 0)
8698 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8700 else if (strcmp (language_string, "GNU Pascal") == 0)
8701 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8703 else if (flag_traditional)
8704 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8707 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8709 #if 0 /* unimplemented */
8710 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8711 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8715 /* Generate a DIE for a string type. */
8718 gen_string_type_die (type, context_die)
8720 register dw_die_ref context_die;
8722 register dw_die_ref type_die
8723 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8725 equate_type_number_to_die (type, type_die);
8727 /* Fudge the string length attribute for now. */
8729 /* TODO: add string length info.
8730 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8731 bound_representation (upper_bound, 0, 'u'); */
8734 /* Generate the DIE for a base class. */
8737 gen_inheritance_die (binfo, context_die)
8738 register tree binfo;
8739 register dw_die_ref context_die;
8741 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8743 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8744 add_data_member_location_attribute (die, binfo);
8746 if (TREE_VIA_VIRTUAL (binfo))
8747 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
8748 if (TREE_VIA_PUBLIC (binfo))
8749 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
8750 else if (TREE_VIA_PROTECTED (binfo))
8751 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
8754 /* Generate a DIE for a class member. */
8757 gen_member_die (type, context_die)
8759 register dw_die_ref context_die;
8761 register tree member;
8763 /* If this is not an incomplete type, output descriptions of each of its
8764 members. Note that as we output the DIEs necessary to represent the
8765 members of this record or union type, we will also be trying to output
8766 DIEs to represent the *types* of those members. However the `type'
8767 function (above) will specifically avoid generating type DIEs for member
8768 types *within* the list of member DIEs for this (containing) type execpt
8769 for those types (of members) which are explicitly marked as also being
8770 members of this (containing) type themselves. The g++ front- end can
8771 force any given type to be treated as a member of some other
8772 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8773 to point to the TREE node representing the appropriate (containing)
8776 /* First output info about the base classes. */
8777 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
8779 register tree bases = TYPE_BINFO_BASETYPES (type);
8780 register int n_bases = TREE_VEC_LENGTH (bases);
8783 for (i = 0; i < n_bases; i++)
8784 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
8787 /* Now output info about the data members and type members. */
8788 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
8789 gen_decl_die (member, context_die);
8791 /* Now output info about the function members (if any). */
8792 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
8793 gen_decl_die (member, context_die);
8796 /* Generate a DIE for a structure or union type. */
8799 gen_struct_or_union_type_die (type, context_die)
8801 register dw_die_ref context_die;
8803 register dw_die_ref type_die = lookup_type_die (type);
8804 register dw_die_ref scope_die = 0;
8805 register int nested = 0;
8807 if (type_die && ! TYPE_SIZE (type))
8810 if (TYPE_CONTEXT (type) != NULL_TREE
8811 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't')
8814 scope_die = scope_die_for (type, context_die);
8816 if (! type_die || (nested && scope_die == comp_unit_die))
8817 /* First occurrence of type or toplevel definition of nested class. */
8819 register dw_die_ref old_die = type_die;
8821 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
8822 ? DW_TAG_structure_type : DW_TAG_union_type,
8824 equate_type_number_to_die (type, type_die);
8825 add_name_attribute (type_die, type_tag (type));
8827 add_AT_die_ref (type_die, DW_AT_specification, old_die);
8830 remove_AT (type_die, DW_AT_declaration);
8832 /* If we're not in the right context to be defining this type, defer to
8833 avoid tricky recursion. */
8834 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
8836 add_AT_flag (type_die, DW_AT_declaration, 1);
8839 /* If this type has been completed, then give it a byte_size attribute and
8840 then give a list of members. */
8841 else if (TYPE_SIZE (type))
8843 /* Prevent infinite recursion in cases where the type of some member of
8844 this type is expressed in terms of this type itself. */
8845 TREE_ASM_WRITTEN (type) = 1;
8846 add_byte_size_attribute (type_die, type);
8847 if (TYPE_STUB_DECL (type) != NULL_TREE)
8848 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8850 /* If the first reference to this type was as the return type of an
8851 inline function, then it may not have a parent. Fix this now. */
8852 if (type_die->die_parent == NULL)
8853 add_child_die (scope_die, type_die);
8855 push_decl_scope (type);
8856 gen_member_die (type, type_die);
8859 /* GNU extension: Record what type our vtable lives in. */
8860 if (TYPE_VFIELD (type))
8862 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
8864 gen_type_die (vtype, context_die);
8865 add_AT_die_ref (type_die, DW_AT_containing_type,
8866 lookup_type_die (vtype));
8870 add_AT_flag (type_die, DW_AT_declaration, 1);
8873 /* Generate a DIE for a subroutine _type_. */
8876 gen_subroutine_type_die (type, context_die)
8878 register dw_die_ref context_die;
8880 register tree return_type = TREE_TYPE (type);
8881 register dw_die_ref subr_die
8882 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
8884 equate_type_number_to_die (type, subr_die);
8885 add_prototyped_attribute (subr_die, type);
8886 add_type_attribute (subr_die, return_type, 0, 0, context_die);
8887 gen_formal_types_die (type, subr_die);
8890 /* Generate a DIE for a type definition */
8893 gen_typedef_die (decl, context_die)
8895 register dw_die_ref context_die;
8897 register dw_die_ref type_die;
8898 register tree origin;
8900 if (TREE_ASM_WRITTEN (decl))
8902 TREE_ASM_WRITTEN (decl) = 1;
8904 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
8905 origin = decl_ultimate_origin (decl);
8907 add_abstract_origin_attribute (type_die, origin);
8911 add_name_and_src_coords_attributes (type_die, decl);
8912 if (DECL_ORIGINAL_TYPE (decl))
8914 type = DECL_ORIGINAL_TYPE (decl);
8915 equate_type_number_to_die (TREE_TYPE (decl), type_die);
8918 type = TREE_TYPE (decl);
8919 add_type_attribute (type_die, type, TREE_READONLY (decl),
8920 TREE_THIS_VOLATILE (decl), context_die);
8923 if (DECL_ABSTRACT (decl))
8924 equate_decl_number_to_die (decl, type_die);
8927 /* Generate a type description DIE. */
8930 gen_type_die (type, context_die)
8932 register dw_die_ref context_die;
8934 if (type == NULL_TREE || type == error_mark_node)
8937 /* We are going to output a DIE to represent the unqualified version of
8938 this type (i.e. without any const or volatile qualifiers) so get the
8939 main variant (i.e. the unqualified version) of this type now. */
8940 type = type_main_variant (type);
8942 if (TREE_ASM_WRITTEN (type))
8945 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8946 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
8948 TREE_ASM_WRITTEN (type) = 1;
8949 gen_decl_die (TYPE_NAME (type), context_die);
8953 switch (TREE_CODE (type))
8959 case REFERENCE_TYPE:
8960 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8961 ensures that the gen_type_die recursion will terminate even if the
8962 type is recursive. Recursive types are possible in Ada. */
8963 /* ??? We could perhaps do this for all types before the switch
8965 TREE_ASM_WRITTEN (type) = 1;
8967 /* For these types, all that is required is that we output a DIE (or a
8968 set of DIEs) to represent the "basis" type. */
8969 gen_type_die (TREE_TYPE (type), context_die);
8973 /* This code is used for C++ pointer-to-data-member types.
8974 Output a description of the relevant class type. */
8975 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
8977 /* Output a description of the type of the object pointed to. */
8978 gen_type_die (TREE_TYPE (type), context_die);
8980 /* Now output a DIE to represent this pointer-to-data-member type
8982 gen_ptr_to_mbr_type_die (type, context_die);
8986 gen_type_die (TYPE_DOMAIN (type), context_die);
8987 gen_set_type_die (type, context_die);
8991 gen_type_die (TREE_TYPE (type), context_die);
8992 abort (); /* No way to represent these in Dwarf yet! */
8996 /* Force out return type (in case it wasn't forced out already). */
8997 gen_type_die (TREE_TYPE (type), context_die);
8998 gen_subroutine_type_die (type, context_die);
9002 /* Force out return type (in case it wasn't forced out already). */
9003 gen_type_die (TREE_TYPE (type), context_die);
9004 gen_subroutine_type_die (type, context_die);
9008 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9010 gen_type_die (TREE_TYPE (type), context_die);
9011 gen_string_type_die (type, context_die);
9014 gen_array_type_die (type, context_die);
9020 case QUAL_UNION_TYPE:
9021 /* If this is a nested type whose containing class hasn't been
9022 written out yet, writing it out will cover this one, too. */
9023 if (TYPE_CONTEXT (type)
9024 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9025 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9027 gen_type_die (TYPE_CONTEXT (type), context_die);
9029 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9032 /* If that failed, attach ourselves to the stub. */
9033 push_decl_scope (TYPE_CONTEXT (type));
9034 context_die = lookup_type_die (TYPE_CONTEXT (type));
9037 if (TREE_CODE (type) == ENUMERAL_TYPE)
9038 gen_enumeration_type_die (type, context_die);
9040 gen_struct_or_union_type_die (type, context_die);
9042 if (TYPE_CONTEXT (type)
9043 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9044 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9047 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9048 it up if it is ever completed. gen_*_type_die will set it for us
9049 when appropriate. */
9058 /* No DIEs needed for fundamental types. */
9062 /* No Dwarf representation currently defined. */
9069 TREE_ASM_WRITTEN (type) = 1;
9072 /* Generate a DIE for a tagged type instantiation. */
9075 gen_tagged_type_instantiation_die (type, context_die)
9077 register dw_die_ref context_die;
9079 if (type == NULL_TREE || type == error_mark_node)
9082 /* We are going to output a DIE to represent the unqualified version of
9083 this type (i.e. without any const or volatile qualifiers) so make sure
9084 that we have the main variant (i.e. the unqualified version) of this
9086 if (type != type_main_variant (type)
9087 || !TREE_ASM_WRITTEN (type))
9090 switch (TREE_CODE (type))
9096 gen_inlined_enumeration_type_die (type, context_die);
9100 gen_inlined_structure_type_die (type, context_die);
9104 case QUAL_UNION_TYPE:
9105 gen_inlined_union_type_die (type, context_die);
9113 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9114 things which are local to the given block. */
9117 gen_block_die (stmt, context_die, depth)
9119 register dw_die_ref context_die;
9122 register int must_output_die = 0;
9123 register tree origin;
9125 register enum tree_code origin_code;
9127 /* Ignore blocks never really used to make RTL. */
9129 if (stmt == NULL_TREE || !TREE_USED (stmt))
9132 /* Determine the "ultimate origin" of this block. This block may be an
9133 inlined instance of an inlined instance of inline function, so we have
9134 to trace all of the way back through the origin chain to find out what
9135 sort of node actually served as the original seed for the creation of
9136 the current block. */
9137 origin = block_ultimate_origin (stmt);
9138 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9140 /* Determine if we need to output any Dwarf DIEs at all to represent this
9142 if (origin_code == FUNCTION_DECL)
9143 /* The outer scopes for inlinings *must* always be represented. We
9144 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9145 must_output_die = 1;
9148 /* In the case where the current block represents an inlining of the
9149 "body block" of an inline function, we must *NOT* output any DIE for
9150 this block because we have already output a DIE to represent the
9151 whole inlined function scope and the "body block" of any function
9152 doesn't really represent a different scope according to ANSI C
9153 rules. So we check here to make sure that this block does not
9154 represent a "body block inlining" before trying to set the
9155 `must_output_die' flag. */
9156 if (! is_body_block (origin ? origin : stmt))
9158 /* Determine if this block directly contains any "significant"
9159 local declarations which we will need to output DIEs for. */
9160 if (debug_info_level > DINFO_LEVEL_TERSE)
9161 /* We are not in terse mode so *any* local declaration counts
9162 as being a "significant" one. */
9163 must_output_die = (BLOCK_VARS (stmt) != NULL);
9165 /* We are in terse mode, so only local (nested) function
9166 definitions count as "significant" local declarations. */
9167 for (decl = BLOCK_VARS (stmt);
9168 decl != NULL; decl = TREE_CHAIN (decl))
9169 if (TREE_CODE (decl) == FUNCTION_DECL
9170 && DECL_INITIAL (decl))
9172 must_output_die = 1;
9178 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9179 DIE for any block which contains no significant local declarations at
9180 all. Rather, in such cases we just call `decls_for_scope' so that any
9181 needed Dwarf info for any sub-blocks will get properly generated. Note
9182 that in terse mode, our definition of what constitutes a "significant"
9183 local declaration gets restricted to include only inlined function
9184 instances and local (nested) function definitions. */
9185 if (must_output_die)
9187 if (origin_code == FUNCTION_DECL)
9188 gen_inlined_subroutine_die (stmt, context_die, depth);
9190 gen_lexical_block_die (stmt, context_die, depth);
9193 decls_for_scope (stmt, context_die, depth);
9196 /* Generate all of the decls declared within a given scope and (recursively)
9197 all of it's sub-blocks. */
9200 decls_for_scope (stmt, context_die, depth)
9202 register dw_die_ref context_die;
9206 register tree subblocks;
9208 /* Ignore blocks never really used to make RTL. */
9209 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9212 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9213 next_block_number++;
9215 /* Output the DIEs to represent all of the data objects and typedefs
9216 declared directly within this block but not within any nested
9217 sub-blocks. Also, nested function and tag DIEs have been
9218 generated with a parent of NULL; fix that up now. */
9219 for (decl = BLOCK_VARS (stmt);
9220 decl != NULL; decl = TREE_CHAIN (decl))
9222 register dw_die_ref die;
9224 if (TREE_CODE (decl) == FUNCTION_DECL)
9225 die = lookup_decl_die (decl);
9226 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9227 die = lookup_type_die (TREE_TYPE (decl));
9231 if (die != NULL && die->die_parent == NULL)
9232 add_child_die (context_die, die);
9234 gen_decl_die (decl, context_die);
9237 /* Output the DIEs to represent all sub-blocks (and the items declared
9238 therein) of this block. */
9239 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9241 subblocks = BLOCK_CHAIN (subblocks))
9242 gen_block_die (subblocks, context_die, depth + 1);
9245 /* Is this a typedef we can avoid emitting? */
9248 is_redundant_typedef (decl)
9251 if (TYPE_DECL_IS_STUB (decl))
9254 if (DECL_ARTIFICIAL (decl)
9255 && DECL_CONTEXT (decl)
9256 && is_tagged_type (DECL_CONTEXT (decl))
9257 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9258 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9259 /* Also ignore the artificial member typedef for the class name. */
9265 /* Generate Dwarf debug information for a decl described by DECL. */
9268 gen_decl_die (decl, context_die)
9270 register dw_die_ref context_die;
9272 register tree origin;
9274 /* Make a note of the decl node we are going to be working on. We may need
9275 to give the user the source coordinates of where it appeared in case we
9276 notice (later on) that something about it looks screwy. */
9277 dwarf_last_decl = decl;
9279 if (TREE_CODE (decl) == ERROR_MARK)
9282 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9283 ignore a function definition, since that would screw up our count of
9284 blocks, and that in turn will completely screw up the labels we will
9285 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9286 subsequent blocks). */
9287 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9290 switch (TREE_CODE (decl))
9293 /* The individual enumerators of an enum type get output when we output
9294 the Dwarf representation of the relevant enum type itself. */
9298 /* Don't output any DIEs to represent mere function declarations,
9299 unless they are class members or explicit block externs. */
9300 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9301 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9304 if (debug_info_level > DINFO_LEVEL_TERSE)
9306 /* Before we describe the FUNCTION_DECL itself, make sure that we
9307 have described its return type. */
9308 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9310 /* And its containing type. */
9311 origin = decl_class_context (decl);
9312 if (origin != NULL_TREE)
9313 gen_type_die (origin, context_die);
9315 /* And its virtual context. */
9316 if (DECL_VINDEX (decl) != NULL_TREE)
9317 gen_type_die (DECL_CONTEXT (decl), context_die);
9320 /* Now output a DIE to represent the function itself. */
9321 gen_subprogram_die (decl, context_die);
9325 /* If we are in terse mode, don't generate any DIEs to represent any
9327 if (debug_info_level <= DINFO_LEVEL_TERSE)
9330 /* In the special case of a TYPE_DECL node representing the
9331 declaration of some type tag, if the given TYPE_DECL is marked as
9332 having been instantiated from some other (original) TYPE_DECL node
9333 (e.g. one which was generated within the original definition of an
9334 inline function) we have to generate a special (abbreviated)
9335 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9337 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9339 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9343 if (is_redundant_typedef (decl))
9344 gen_type_die (TREE_TYPE (decl), context_die);
9346 /* Output a DIE to represent the typedef itself. */
9347 gen_typedef_die (decl, context_die);
9351 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9352 gen_label_die (decl, context_die);
9356 /* If we are in terse mode, don't generate any DIEs to represent any
9357 variable declarations or definitions. */
9358 if (debug_info_level <= DINFO_LEVEL_TERSE)
9361 /* Output any DIEs that are needed to specify the type of this data
9363 gen_type_die (TREE_TYPE (decl), context_die);
9365 /* And its containing type. */
9366 origin = decl_class_context (decl);
9367 if (origin != NULL_TREE)
9368 gen_type_die (origin, context_die);
9370 /* Now output the DIE to represent the data object itself. This gets
9371 complicated because of the possibility that the VAR_DECL really
9372 represents an inlined instance of a formal parameter for an inline
9374 origin = decl_ultimate_origin (decl);
9375 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9376 gen_formal_parameter_die (decl, context_die);
9378 gen_variable_die (decl, context_die);
9382 /* Ignore the nameless fields that are used to skip bits, but
9383 handle C++ anonymous unions. */
9384 if (DECL_NAME (decl) != NULL_TREE
9385 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9387 gen_type_die (member_declared_type (decl), context_die);
9388 gen_field_die (decl, context_die);
9393 gen_type_die (TREE_TYPE (decl), context_die);
9394 gen_formal_parameter_die (decl, context_die);
9402 /* Write the debugging output for DECL. */
9405 dwarf2out_decl (decl)
9408 register dw_die_ref context_die = comp_unit_die;
9410 if (TREE_CODE (decl) == ERROR_MARK)
9413 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9414 hope that the node in question doesn't represent a function definition.
9415 If it does, then totally ignoring it is bound to screw up our count of
9416 blocks, and that in turn will completely screw up the labels we will
9417 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9418 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9419 own sequence numbers with them!) */
9420 if (DECL_IGNORED_P (decl))
9422 if (TREE_CODE (decl) == FUNCTION_DECL
9423 && DECL_INITIAL (decl) != NULL)
9429 switch (TREE_CODE (decl))
9432 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9433 builtin function. Explicit programmer-supplied declarations of
9434 these same functions should NOT be ignored however. */
9435 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9438 /* What we would really like to do here is to filter out all mere
9439 file-scope declarations of file-scope functions which are never
9440 referenced later within this translation unit (and keep all of ones
9441 that *are* referenced later on) but we aren't clairvoyant, so we have
9442 no idea which functions will be referenced in the future (i.e. later
9443 on within the current translation unit). So here we just ignore all
9444 file-scope function declarations which are not also definitions. If
9445 and when the debugger needs to know something about these functions,
9446 it wil have to hunt around and find the DWARF information associated
9447 with the definition of the function. Note that we can't just check
9448 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9449 definitions and which ones represent mere declarations. We have to
9450 check `DECL_INITIAL' instead. That's because the C front-end
9451 supports some weird semantics for "extern inline" function
9452 definitions. These can get inlined within the current translation
9453 unit (an thus, we need to generate DWARF info for their abstract
9454 instances so that the DWARF info for the concrete inlined instances
9455 can have something to refer to) but the compiler never generates any
9456 out-of-lines instances of such things (despite the fact that they
9457 *are* definitions). The important point is that the C front-end
9458 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9459 to generate DWARF for them anyway. Note that the C++ front-end also
9460 plays some similar games for inline function definitions appearing
9461 within include files which also contain
9462 `#pragma interface' pragmas. */
9463 if (DECL_INITIAL (decl) == NULL_TREE)
9466 /* If we're a nested function, initially use a parent of NULL; if we're
9467 a plain function, this will be fixed up in decls_for_scope. If
9468 we're a method, it will be ignored, since we already have a DIE. */
9469 if (decl_function_context (decl))
9475 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9476 declaration and if the declaration was never even referenced from
9477 within this entire compilation unit. We suppress these DIEs in
9478 order to save space in the .debug section (by eliminating entries
9479 which are probably useless). Note that we must not suppress
9480 block-local extern declarations (whether used or not) because that
9481 would screw-up the debugger's name lookup mechanism and cause it to
9482 miss things which really ought to be in scope at a given point. */
9483 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9486 /* If we are in terse mode, don't generate any DIEs to represent any
9487 variable declarations or definitions. */
9488 if (debug_info_level <= DINFO_LEVEL_TERSE)
9493 /* Don't bother trying to generate any DIEs to represent any of the
9494 normal built-in types for the language we are compiling. */
9495 if (DECL_SOURCE_LINE (decl) == 0)
9497 /* OK, we need to generate one for `bool' so GDB knows what type
9498 comparisons have. */
9499 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9500 == DW_LANG_C_plus_plus)
9501 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9502 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9507 /* If we are in terse mode, don't generate any DIEs for types. */
9508 if (debug_info_level <= DINFO_LEVEL_TERSE)
9511 /* If we're a function-scope tag, initially use a parent of NULL;
9512 this will be fixed up in decls_for_scope. */
9513 if (decl_function_context (decl))
9522 gen_decl_die (decl, context_die);
9523 output_pending_types_for_scope (comp_unit_die);
9526 /* Output a marker (i.e. a label) for the beginning of the generated code for
9530 dwarf2out_begin_block (blocknum)
9531 register unsigned blocknum;
9533 function_section (current_function_decl);
9534 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9537 /* Output a marker (i.e. a label) for the end of the generated code for a
9541 dwarf2out_end_block (blocknum)
9542 register unsigned blocknum;
9544 function_section (current_function_decl);
9545 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9548 /* Output a marker (i.e. a label) at a point in the assembly code which
9549 corresponds to a given source level label. */
9552 dwarf2out_label (insn)
9555 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9557 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9559 function_section (current_function_decl);
9560 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9561 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9562 (unsigned) INSN_UID (insn));
9566 /* Lookup a filename (in the list of filenames that we know about here in
9567 dwarf2out.c) and return its "index". The index of each (known) filename is
9568 just a unique number which is associated with only that one filename.
9569 We need such numbers for the sake of generating labels
9570 (in the .debug_sfnames section) and references to those
9571 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9572 If the filename given as an argument is not found in our current list,
9573 add it to the list and assign it the next available unique index number.
9574 In order to speed up searches, we remember the index of the filename
9575 was looked up last. This handles the majority of all searches. */
9578 lookup_filename (file_name)
9581 static unsigned last_file_lookup_index = 0;
9582 register unsigned i;
9584 /* Check to see if the file name that was searched on the previous call
9585 matches this file name. If so, return the index. */
9586 if (last_file_lookup_index != 0)
9587 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9588 return last_file_lookup_index;
9590 /* Didn't match the previous lookup, search the table */
9591 for (i = 1; i < file_table_in_use; ++i)
9592 if (strcmp (file_name, file_table[i]) == 0)
9594 last_file_lookup_index = i;
9598 /* Prepare to add a new table entry by making sure there is enough space in
9599 the table to do so. If not, expand the current table. */
9600 if (file_table_in_use == file_table_allocated)
9602 file_table_allocated += FILE_TABLE_INCREMENT;
9604 = (char **) xrealloc (file_table,
9605 file_table_allocated * sizeof (char *));
9608 /* Add the new entry to the end of the filename table. */
9609 file_table[file_table_in_use] = xstrdup (file_name);
9610 last_file_lookup_index = file_table_in_use++;
9612 return last_file_lookup_index;
9615 /* Output a label to mark the beginning of a source code line entry
9616 and record information relating to this source line, in
9617 'line_info_table' for later output of the .debug_line section. */
9620 dwarf2out_line (filename, line)
9621 register char *filename;
9622 register unsigned line;
9624 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9626 function_section (current_function_decl);
9628 if (DECL_SECTION_NAME (current_function_decl))
9630 register dw_separate_line_info_ref line_info;
9631 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9632 separate_line_info_table_in_use);
9633 fputc ('\n', asm_out_file);
9635 /* expand the line info table if necessary */
9636 if (separate_line_info_table_in_use
9637 == separate_line_info_table_allocated)
9639 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9640 separate_line_info_table
9641 = (dw_separate_line_info_ref)
9642 xrealloc (separate_line_info_table,
9643 separate_line_info_table_allocated
9644 * sizeof (dw_separate_line_info_entry));
9647 /* Add the new entry at the end of the line_info_table. */
9649 = &separate_line_info_table[separate_line_info_table_in_use++];
9650 line_info->dw_file_num = lookup_filename (filename);
9651 line_info->dw_line_num = line;
9652 line_info->function = current_funcdef_number;
9656 register dw_line_info_ref line_info;
9658 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9659 line_info_table_in_use);
9660 fputc ('\n', asm_out_file);
9662 /* Expand the line info table if necessary. */
9663 if (line_info_table_in_use == line_info_table_allocated)
9665 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9667 = (dw_line_info_ref)
9668 xrealloc (line_info_table,
9669 (line_info_table_allocated
9670 * sizeof (dw_line_info_entry)));
9673 /* Add the new entry at the end of the line_info_table. */
9674 line_info = &line_info_table[line_info_table_in_use++];
9675 line_info->dw_file_num = lookup_filename (filename);
9676 line_info->dw_line_num = line;
9681 /* Record the beginning of a new source file, for later output
9682 of the .debug_macinfo section. At present, unimplemented. */
9685 dwarf2out_start_source_file (filename)
9686 register char *filename ATTRIBUTE_UNUSED;
9690 /* Record the end of a source file, for later output
9691 of the .debug_macinfo section. At present, unimplemented. */
9694 dwarf2out_end_source_file ()
9698 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9699 the tail part of the directive line, i.e. the part which is past the
9700 initial whitespace, #, whitespace, directive-name, whitespace part. */
9703 dwarf2out_define (lineno, buffer)
9704 register unsigned lineno;
9705 register char *buffer;
9707 static int initialized = 0;
9710 dwarf2out_start_source_file (primary_filename);
9715 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9716 the tail part of the directive line, i.e. the part which is past the
9717 initial whitespace, #, whitespace, directive-name, whitespace part. */
9720 dwarf2out_undef (lineno, buffer)
9721 register unsigned lineno ATTRIBUTE_UNUSED;
9722 register char *buffer ATTRIBUTE_UNUSED;
9726 /* Set up for Dwarf output at the start of compilation. */
9729 dwarf2out_init (asm_out_file, main_input_filename)
9730 register FILE *asm_out_file;
9731 register char *main_input_filename;
9733 /* Remember the name of the primary input file. */
9734 primary_filename = main_input_filename;
9736 /* Allocate the initial hunk of the file_table. */
9737 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
9738 bzero ((char *) file_table, FILE_TABLE_INCREMENT * sizeof (char *));
9739 file_table_allocated = FILE_TABLE_INCREMENT;
9741 /* Skip the first entry - file numbers begin at 1. */
9742 file_table_in_use = 1;
9744 /* Allocate the initial hunk of the decl_die_table. */
9746 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9747 bzero ((char *) decl_die_table,
9748 DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9749 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
9750 decl_die_table_in_use = 0;
9752 /* Allocate the initial hunk of the decl_scope_table. */
9754 = (decl_scope_node *) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9755 * sizeof (decl_scope_node));
9756 bzero ((char *) decl_scope_table,
9757 DECL_SCOPE_TABLE_INCREMENT * sizeof (decl_scope_node));
9758 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
9759 decl_scope_depth = 0;
9761 /* Allocate the initial hunk of the abbrev_die_table. */
9763 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9764 * sizeof (dw_die_ref));
9765 bzero ((char *) abbrev_die_table,
9766 ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9767 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
9768 /* Zero-th entry is allocated, but unused */
9769 abbrev_die_table_in_use = 1;
9771 /* Allocate the initial hunk of the line_info_table. */
9773 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
9774 * sizeof (dw_line_info_entry));
9775 bzero ((char *) line_info_table,
9776 LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry));
9777 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
9778 /* Zero-th entry is allocated, but unused */
9779 line_info_table_in_use = 1;
9781 /* Generate the initial DIE for the .debug section. Note that the (string)
9782 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9783 will (typically) be a relative pathname and that this pathname should be
9784 taken as being relative to the directory from which the compiler was
9785 invoked when the given (base) source file was compiled. */
9786 gen_compile_unit_die (main_input_filename);
9788 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
9791 /* Output stuff that dwarf requires at the end of every file,
9792 and generate the DWARF-2 debugging info. */
9797 limbo_die_node *node, *next_node;
9801 /* Traverse the limbo die list, and add parent/child links. The only
9802 dies without parents that should be here are concrete instances of
9803 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9804 For concrete instances, we can get the parent die from the abstract
9806 for (node = limbo_die_list; node; node = next_node)
9808 next_node = node->next;
9811 if (die->die_parent == NULL)
9813 a = get_AT (die, DW_AT_abstract_origin);
9815 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
9816 else if (die == comp_unit_die)
9824 /* Traverse the DIE tree and add sibling attributes to those DIE's
9825 that have children. */
9826 add_sibling_attributes (comp_unit_die);
9828 /* Output a terminator label for the .text section. */
9829 fputc ('\n', asm_out_file);
9830 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
9831 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
9834 /* Output a terminator label for the .data section. */
9835 fputc ('\n', asm_out_file);
9836 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
9837 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
9839 /* Output a terminator label for the .bss section. */
9840 fputc ('\n', asm_out_file);
9841 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
9842 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
9845 /* Output the source line correspondence table. */
9846 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
9848 fputc ('\n', asm_out_file);
9849 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
9850 output_line_info ();
9852 /* We can only use the low/high_pc attributes if all of the code
9854 if (separate_line_info_table_in_use == 0)
9856 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, TEXT_SECTION);
9857 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
9860 add_AT_section_offset (comp_unit_die, DW_AT_stmt_list, DEBUG_LINE_SECTION);
9863 /* Output the abbreviation table. */
9864 fputc ('\n', asm_out_file);
9865 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
9866 build_abbrev_table (comp_unit_die);
9867 output_abbrev_section ();
9869 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9870 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
9871 calc_die_sizes (comp_unit_die);
9873 /* Output debugging information. */
9874 fputc ('\n', asm_out_file);
9875 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
9876 output_compilation_unit_header ();
9877 output_die (comp_unit_die);
9879 if (pubname_table_in_use)
9881 /* Output public names table. */
9882 fputc ('\n', asm_out_file);
9883 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
9887 if (fde_table_in_use)
9889 /* Output the address range information. */
9890 fputc ('\n', asm_out_file);
9891 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
9895 #endif /* DWARF2_DEBUGGING_INFO */