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"
45 #include "dyn-string.h"
47 /* We cannot use <assert.h> in GCC source, since that would include
48 GCC's assert.h, which may not be compatible with the host compiler. */
53 # define assert(e) do { if (! (e)) abort (); } while (0)
56 /* Decide whether we want to emit frame unwind information for the current
62 return (write_symbols == DWARF2_DEBUG
63 #ifdef DWARF2_FRAME_INFO
66 #ifdef DWARF2_UNWIND_INFO
67 || (flag_exceptions && ! exceptions_via_longjmp)
72 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
78 /* How to start an assembler comment. */
79 #ifndef ASM_COMMENT_START
80 #define ASM_COMMENT_START ";#"
83 typedef struct dw_cfi_struct *dw_cfi_ref;
84 typedef struct dw_fde_struct *dw_fde_ref;
85 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
87 /* Call frames are described using a sequence of Call Frame
88 Information instructions. The register number, offset
89 and address fields are provided as possible operands;
90 their use is selected by the opcode field. */
92 typedef union dw_cfi_oprnd_struct
94 unsigned long dw_cfi_reg_num;
95 long int dw_cfi_offset;
100 typedef struct dw_cfi_struct
102 dw_cfi_ref dw_cfi_next;
103 enum dwarf_call_frame_info dw_cfi_opc;
104 dw_cfi_oprnd dw_cfi_oprnd1;
105 dw_cfi_oprnd dw_cfi_oprnd2;
109 /* All call frame descriptions (FDE's) in the GCC generated DWARF
110 refer to a single Common Information Entry (CIE), defined at
111 the beginning of the .debug_frame section. This used of a single
112 CIE obviates the need to keep track of multiple CIE's
113 in the DWARF generation routines below. */
115 typedef struct dw_fde_struct
118 char *dw_fde_current_label;
120 dw_cfi_ref dw_fde_cfi;
124 /* Maximum size (in bytes) of an artificially generated label. */
125 #define MAX_ARTIFICIAL_LABEL_BYTES 30
127 /* Make sure we know the sizes of the various types dwarf can describe. These
128 are only defaults. If the sizes are different for your target, you should
129 override these values by defining the appropriate symbols in your tm.h
132 #ifndef CHAR_TYPE_SIZE
133 #define CHAR_TYPE_SIZE BITS_PER_UNIT
136 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
139 /* The size in bytes of a DWARF field indicating an offset or length
140 relative to a debug info section, specified to be 4 bytes in the DWARF-2
141 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
143 #ifndef DWARF_OFFSET_SIZE
144 #define DWARF_OFFSET_SIZE 4
147 #define DWARF_VERSION 2
149 /* Round SIZE up to the nearest BOUNDARY. */
150 #define DWARF_ROUND(SIZE,BOUNDARY) \
151 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
153 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
154 #ifdef STACK_GROWS_DOWNWARD
155 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
157 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
160 /* A pointer to the base of a table that contains frame description
161 information for each routine. */
162 static dw_fde_ref fde_table;
164 /* Number of elements currently allocated for fde_table. */
165 static unsigned fde_table_allocated;
167 /* Number of elements in fde_table currently in use. */
168 static unsigned fde_table_in_use;
170 /* Size (in elements) of increments by which we may expand the
172 #define FDE_TABLE_INCREMENT 256
174 /* A list of call frame insns for the CIE. */
175 static dw_cfi_ref cie_cfi_head;
177 /* The number of the current function definition for which debugging
178 information is being generated. These numbers range from 1 up to the
179 maximum number of function definitions contained within the current
180 compilation unit. These numbers are used to create unique label id's
181 unique to each function definition. */
182 static unsigned current_funcdef_number = 0;
184 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
185 attribute that accelerates the lookup of the FDE associated
186 with the subprogram. This variable holds the table index of the FDE
187 associated with the current function (body) definition. */
188 static unsigned current_funcdef_fde;
190 /* Forward declarations for functions defined in this file. */
192 static char *stripattributes PROTO((char *));
193 static char *dwarf_cfi_name PROTO((unsigned));
194 static dw_cfi_ref new_cfi PROTO((void));
195 static void add_cfi PROTO((dw_cfi_ref *, dw_cfi_ref));
196 static unsigned long size_of_uleb128 PROTO((unsigned long));
197 static unsigned long size_of_sleb128 PROTO((long));
198 static void output_uleb128 PROTO((unsigned long));
199 static void output_sleb128 PROTO((long));
200 static void add_fde_cfi PROTO((char *, dw_cfi_ref));
201 static void lookup_cfa_1 PROTO((dw_cfi_ref, unsigned long *,
203 static void lookup_cfa PROTO((unsigned long *, long *));
204 static void reg_save PROTO((char *, unsigned, unsigned,
206 static void initial_return_save PROTO((rtx));
207 static void output_cfi PROTO((dw_cfi_ref, dw_fde_ref));
208 static void output_call_frame_info PROTO((int));
209 static unsigned reg_number PROTO((rtx));
210 static void dwarf2out_stack_adjust PROTO((rtx));
212 /* Definitions of defaults for assembler-dependent names of various
213 pseudo-ops and section names.
214 Theses may be overridden in the tm.h file (if necessary) for a particular
217 #ifdef OBJECT_FORMAT_ELF
218 #ifndef UNALIGNED_SHORT_ASM_OP
219 #define UNALIGNED_SHORT_ASM_OP ".2byte"
221 #ifndef UNALIGNED_INT_ASM_OP
222 #define UNALIGNED_INT_ASM_OP ".4byte"
224 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
225 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
227 #endif /* OBJECT_FORMAT_ELF */
230 #define ASM_BYTE_OP ".byte"
233 /* Data and reference forms for relocatable data. */
234 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
235 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
237 /* Pseudo-op for defining a new section. */
238 #ifndef SECTION_ASM_OP
239 #define SECTION_ASM_OP ".section"
242 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
243 print the SECTION_ASM_OP and the section name. The default here works for
244 almost all svr4 assemblers, except for the sparc, where the section name
245 must be enclosed in double quotes. (See sparcv4.h). */
246 #ifndef SECTION_FORMAT
247 #ifdef PUSHSECTION_FORMAT
248 #define SECTION_FORMAT PUSHSECTION_FORMAT
250 #define SECTION_FORMAT "\t%s\t%s\n"
254 #ifndef FRAME_SECTION
255 #define FRAME_SECTION ".debug_frame"
258 #ifndef FUNC_BEGIN_LABEL
259 #define FUNC_BEGIN_LABEL "LFB"
261 #ifndef FUNC_END_LABEL
262 #define FUNC_END_LABEL "LFE"
264 #define CIE_AFTER_SIZE_LABEL "LSCIE"
265 #define CIE_END_LABEL "LECIE"
266 #define CIE_LENGTH_LABEL "LLCIE"
267 #define FDE_AFTER_SIZE_LABEL "LSFDE"
268 #define FDE_END_LABEL "LEFDE"
269 #define FDE_LENGTH_LABEL "LLFDE"
271 /* Definitions of defaults for various types of primitive assembly language
272 output operations. These may be overridden from within the tm.h file,
273 but typically, that is unnecessary. */
275 #ifndef ASM_OUTPUT_SECTION
276 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
277 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
280 #ifndef ASM_OUTPUT_DWARF_DATA1
281 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
282 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
285 #ifndef ASM_OUTPUT_DWARF_DELTA1
286 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
287 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
288 assemble_name (FILE, LABEL1); \
289 fprintf (FILE, "-"); \
290 assemble_name (FILE, LABEL2); \
294 #ifdef UNALIGNED_INT_ASM_OP
296 #ifndef UNALIGNED_OFFSET_ASM_OP
297 #define UNALIGNED_OFFSET_ASM_OP \
298 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
301 #ifndef UNALIGNED_WORD_ASM_OP
302 #define UNALIGNED_WORD_ASM_OP \
303 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
306 #ifndef ASM_OUTPUT_DWARF_DELTA2
307 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
308 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
309 assemble_name (FILE, LABEL1); \
310 fprintf (FILE, "-"); \
311 assemble_name (FILE, LABEL2); \
315 #ifndef ASM_OUTPUT_DWARF_DELTA4
316 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
317 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
318 assemble_name (FILE, LABEL1); \
319 fprintf (FILE, "-"); \
320 assemble_name (FILE, LABEL2); \
324 #ifndef ASM_OUTPUT_DWARF_DELTA
325 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
326 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
327 assemble_name (FILE, LABEL1); \
328 fprintf (FILE, "-"); \
329 assemble_name (FILE, LABEL2); \
333 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
334 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
335 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
336 assemble_name (FILE, LABEL1); \
337 fprintf (FILE, "-"); \
338 assemble_name (FILE, LABEL2); \
342 #ifndef ASM_OUTPUT_DWARF_ADDR
343 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
344 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
345 assemble_name (FILE, LABEL); \
349 /* ??? This macro takes an RTX in dwarfout.c and a string in dwarf2out.c.
350 We resolve the conflict by creating a new macro ASM_OUTPUT_DWARF2_ADDR_CONST
351 for ports that want to support both DWARF1 and DWARF2. This needs a better
352 solution. See also the comments in sparc/sp64-elf.h. */
353 #ifdef ASM_OUTPUT_DWARF2_ADDR_CONST
354 #undef ASM_OUTPUT_DWARF_ADDR_CONST
355 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
356 ASM_OUTPUT_DWARF2_ADDR_CONST (FILE, ADDR)
359 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
360 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
361 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
364 #ifndef ASM_OUTPUT_DWARF_OFFSET4
365 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
366 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
367 assemble_name (FILE, LABEL); \
371 #ifndef ASM_OUTPUT_DWARF_OFFSET
372 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
373 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
374 assemble_name (FILE, LABEL); \
378 #ifndef ASM_OUTPUT_DWARF_DATA2
379 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
380 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
383 #ifndef ASM_OUTPUT_DWARF_DATA4
384 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
385 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
388 #ifndef ASM_OUTPUT_DWARF_DATA
389 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
390 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
391 (unsigned long) (VALUE))
394 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
395 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
396 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
397 (unsigned long) (VALUE))
400 #ifndef ASM_OUTPUT_DWARF_DATA8
401 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
403 if (WORDS_BIG_ENDIAN) \
405 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
406 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
410 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
411 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
416 #else /* UNALIGNED_INT_ASM_OP */
418 /* We don't have unaligned support, let's hope the normal output works for
421 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
422 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
424 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
425 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
427 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
428 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
430 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
431 assemble_integer (gen_rtx_MINUS (HImode, \
432 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
433 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
436 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
437 assemble_integer (gen_rtx_MINUS (SImode, \
438 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
439 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
442 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
443 assemble_integer (gen_rtx_MINUS (Pmode, \
444 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
445 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
448 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
449 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
451 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
452 assemble_integer (GEN_INT (VALUE), 4, 1)
454 #endif /* UNALIGNED_INT_ASM_OP */
457 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
458 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
460 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
461 assemble_name (FILE, SY); \
463 assemble_name (FILE, HI); \
465 assemble_name (FILE, LO); \
468 #endif /* SET_ASM_OP */
470 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
471 newline is produced. When flag_debug_asm is asserted, we add commentary
472 at the end of the line, so we must avoid output of a newline here. */
473 #ifndef ASM_OUTPUT_DWARF_STRING
474 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
476 register int slen = strlen(P); \
477 register char *p = (P); \
479 fprintf (FILE, "\t.ascii \""); \
480 for (i = 0; i < slen; i++) \
482 register int c = p[i]; \
483 if (c == '\"' || c == '\\') \
485 if (c >= ' ' && c < 0177) \
489 fprintf (FILE, "\\%o", c); \
492 fprintf (FILE, "\\0\""); \
497 /* The DWARF 2 CFA column which tracks the return address. Normally this
498 is the column for PC, or the first column after all of the hard
500 #ifndef DWARF_FRAME_RETURN_COLUMN
502 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
504 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
508 /* The mapping from gcc register number to DWARF 2 CFA column number. By
509 default, we just provide columns for all registers. */
510 #ifndef DWARF_FRAME_REGNUM
511 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
514 /* Hook used by __throw. */
517 expand_builtin_dwarf_fp_regnum ()
519 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
522 /* The offset from the incoming value of %sp to the top of the stack frame
523 for the current function. */
524 #ifndef INCOMING_FRAME_SP_OFFSET
525 #define INCOMING_FRAME_SP_OFFSET 0
528 /* Return a pointer to a copy of the section string name S with all
529 attributes stripped off, and an asterisk prepended (for assemble_name). */
535 char *stripped = xmalloc (strlen (s) + 2);
540 while (*s && *s != ',')
547 /* Return the register number described by a given RTL node. */
553 register unsigned regno = REGNO (rtl);
555 if (regno >= FIRST_PSEUDO_REGISTER)
557 warning ("internal regno botch: regno = %d\n", regno);
561 regno = DBX_REGISTER_NUMBER (regno);
565 struct reg_size_range
572 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
573 We do this in kind of a roundabout way, by building up a list of
574 register size ranges and seeing where our register falls in one of those
575 ranges. We need to do it this way because REG_TREE is not a constant,
576 and the target macros were not designed to make this task easy. */
579 expand_builtin_dwarf_reg_size (reg_tree, target)
583 enum machine_mode mode;
585 struct reg_size_range ranges[5];
592 for (; i < FIRST_PSEUDO_REGISTER; ++i)
594 /* The return address is out of order on the MIPS, and we don't use
595 copy_reg for it anyway, so we don't care here how large it is. */
596 if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
599 mode = reg_raw_mode[i];
601 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
602 to use the same size as word_mode, since that reduces the number
603 of ranges we need. It should not matter, since the result should
604 never be used for a condition code register anyways. */
605 if (GET_MODE_CLASS (mode) == MODE_CC)
608 size = GET_MODE_SIZE (mode);
610 /* If this register is not valid in the specified mode and
611 we have a previous size, use that for the size of this
612 register to avoid making junk tiny ranges. */
613 if (! HARD_REGNO_MODE_OK (i, mode) && last_size != -1)
616 if (size != last_size)
618 ranges[n_ranges].beg = i;
619 ranges[n_ranges].size = last_size = size;
624 ranges[n_ranges-1].end = i;
627 /* The usual case: fp regs surrounded by general regs. */
628 if (n_ranges == 3 && ranges[0].size == ranges[2].size)
630 if ((DWARF_FRAME_REGNUM (ranges[1].end)
631 - DWARF_FRAME_REGNUM (ranges[1].beg))
632 != ranges[1].end - ranges[1].beg)
634 t = fold (build (GE_EXPR, integer_type_node, reg_tree,
635 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].beg), 0)));
636 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
637 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].end), 0)));
638 t = fold (build (TRUTH_ANDIF_EXPR, integer_type_node, t, t2));
639 t = fold (build (COND_EXPR, integer_type_node, t,
640 build_int_2 (ranges[1].size, 0),
641 build_int_2 (ranges[0].size, 0)));
645 int last_end = FIRST_PSEUDO_REGISTER;
647 t = build_int_2 (ranges[n_ranges].size, 0);
650 int beg = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
651 int end = DWARF_FRAME_REGNUM (ranges[n_ranges].end);
657 if (end - beg != ranges[n_ranges].end - ranges[n_ranges].beg)
659 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
660 build_int_2 (end, 0)));
661 t = fold (build (COND_EXPR, integer_type_node, t2,
662 build_int_2 (ranges[n_ranges].size, 0), t));
664 while (--n_ranges > 0);
666 return expand_expr (t, target, Pmode, 0);
669 /* Convert a DWARF call frame info. operation to its string name */
672 dwarf_cfi_name (cfi_opc)
673 register unsigned cfi_opc;
677 case DW_CFA_advance_loc:
678 return "DW_CFA_advance_loc";
680 return "DW_CFA_offset";
682 return "DW_CFA_restore";
686 return "DW_CFA_set_loc";
687 case DW_CFA_advance_loc1:
688 return "DW_CFA_advance_loc1";
689 case DW_CFA_advance_loc2:
690 return "DW_CFA_advance_loc2";
691 case DW_CFA_advance_loc4:
692 return "DW_CFA_advance_loc4";
693 case DW_CFA_offset_extended:
694 return "DW_CFA_offset_extended";
695 case DW_CFA_restore_extended:
696 return "DW_CFA_restore_extended";
697 case DW_CFA_undefined:
698 return "DW_CFA_undefined";
699 case DW_CFA_same_value:
700 return "DW_CFA_same_value";
701 case DW_CFA_register:
702 return "DW_CFA_register";
703 case DW_CFA_remember_state:
704 return "DW_CFA_remember_state";
705 case DW_CFA_restore_state:
706 return "DW_CFA_restore_state";
708 return "DW_CFA_def_cfa";
709 case DW_CFA_def_cfa_register:
710 return "DW_CFA_def_cfa_register";
711 case DW_CFA_def_cfa_offset:
712 return "DW_CFA_def_cfa_offset";
714 /* SGI/MIPS specific */
715 case DW_CFA_MIPS_advance_loc8:
716 return "DW_CFA_MIPS_advance_loc8";
719 case DW_CFA_GNU_window_save:
720 return "DW_CFA_GNU_window_save";
721 case DW_CFA_GNU_args_size:
722 return "DW_CFA_GNU_args_size";
725 return "DW_CFA_<unknown>";
729 /* Return a pointer to a newly allocated Call Frame Instruction. */
731 static inline dw_cfi_ref
734 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
736 cfi->dw_cfi_next = NULL;
737 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
738 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
743 /* Add a Call Frame Instruction to list of instructions. */
746 add_cfi (list_head, cfi)
747 register dw_cfi_ref *list_head;
748 register dw_cfi_ref cfi;
750 register dw_cfi_ref *p;
752 /* Find the end of the chain. */
753 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
759 /* Generate a new label for the CFI info to refer to. */
762 dwarf2out_cfi_label ()
764 static char label[20];
765 static unsigned long label_num = 0;
767 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
768 ASM_OUTPUT_LABEL (asm_out_file, label);
773 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
774 or to the CIE if LABEL is NULL. */
777 add_fde_cfi (label, cfi)
778 register char *label;
779 register dw_cfi_ref cfi;
783 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
786 label = dwarf2out_cfi_label ();
788 if (fde->dw_fde_current_label == NULL
789 || strcmp (label, fde->dw_fde_current_label) != 0)
791 register dw_cfi_ref xcfi;
793 fde->dw_fde_current_label = label = xstrdup (label);
795 /* Set the location counter to the new label. */
797 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
798 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
799 add_cfi (&fde->dw_fde_cfi, xcfi);
802 add_cfi (&fde->dw_fde_cfi, cfi);
806 add_cfi (&cie_cfi_head, cfi);
809 /* Subroutine of lookup_cfa. */
812 lookup_cfa_1 (cfi, regp, offsetp)
813 register dw_cfi_ref cfi;
814 register unsigned long *regp;
815 register long *offsetp;
817 switch (cfi->dw_cfi_opc)
819 case DW_CFA_def_cfa_offset:
820 *offsetp = cfi->dw_cfi_oprnd1.dw_cfi_offset;
822 case DW_CFA_def_cfa_register:
823 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
826 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
827 *offsetp = cfi->dw_cfi_oprnd2.dw_cfi_offset;
834 /* Find the previous value for the CFA. */
837 lookup_cfa (regp, offsetp)
838 register unsigned long *regp;
839 register long *offsetp;
841 register dw_cfi_ref cfi;
843 *regp = (unsigned long) -1;
846 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
847 lookup_cfa_1 (cfi, regp, offsetp);
849 if (fde_table_in_use)
851 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
852 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
853 lookup_cfa_1 (cfi, regp, offsetp);
857 /* The current rule for calculating the DWARF2 canonical frame address. */
858 static unsigned long cfa_reg;
859 static long cfa_offset;
861 /* The register used for saving registers to the stack, and its offset
863 static unsigned cfa_store_reg;
864 static long cfa_store_offset;
866 /* The running total of the size of arguments pushed onto the stack. */
867 static long args_size;
869 /* The last args_size we actually output. */
870 static long old_args_size;
872 /* Entry point to update the canonical frame address (CFA).
873 LABEL is passed to add_fde_cfi. The value of CFA is now to be
874 calculated from REG+OFFSET. */
877 dwarf2out_def_cfa (label, reg, offset)
878 register char *label;
879 register unsigned reg;
880 register long offset;
882 register dw_cfi_ref cfi;
883 unsigned long old_reg;
888 if (cfa_store_reg == reg)
889 cfa_store_offset = offset;
891 reg = DWARF_FRAME_REGNUM (reg);
892 lookup_cfa (&old_reg, &old_offset);
894 if (reg == old_reg && offset == old_offset)
901 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
902 cfi->dw_cfi_oprnd1.dw_cfi_offset = offset;
905 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
906 else if (offset == old_offset && old_reg != (unsigned long) -1)
908 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
909 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
915 cfi->dw_cfi_opc = DW_CFA_def_cfa;
916 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
917 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
920 add_fde_cfi (label, cfi);
923 /* Add the CFI for saving a register. REG is the CFA column number.
924 LABEL is passed to add_fde_cfi.
925 If SREG is -1, the register is saved at OFFSET from the CFA;
926 otherwise it is saved in SREG. */
929 reg_save (label, reg, sreg, offset)
930 register char * label;
931 register unsigned reg;
932 register unsigned sreg;
933 register long offset;
935 register dw_cfi_ref cfi = new_cfi ();
937 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
939 /* The following comparison is correct. -1 is used to indicate that
940 the value isn't a register number. */
941 if (sreg == (unsigned int) -1)
944 /* The register number won't fit in 6 bits, so we have to use
946 cfi->dw_cfi_opc = DW_CFA_offset_extended;
948 cfi->dw_cfi_opc = DW_CFA_offset;
950 offset /= DWARF_CIE_DATA_ALIGNMENT;
953 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
957 cfi->dw_cfi_opc = DW_CFA_register;
958 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
961 add_fde_cfi (label, cfi);
964 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
965 This CFI tells the unwinder that it needs to restore the window registers
966 from the previous frame's window save area.
968 ??? Perhaps we should note in the CIE where windows are saved (instead of
969 assuming 0(cfa)) and what registers are in the window. */
972 dwarf2out_window_save (label)
973 register char * label;
975 register dw_cfi_ref cfi = new_cfi ();
976 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
977 add_fde_cfi (label, cfi);
980 /* Add a CFI to update the running total of the size of arguments
981 pushed onto the stack. */
984 dwarf2out_args_size (label, size)
988 register dw_cfi_ref cfi;
990 if (size == old_args_size)
992 old_args_size = size;
995 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
996 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
997 add_fde_cfi (label, cfi);
1000 /* Entry point for saving a register to the stack. REG is the GCC register
1001 number. LABEL and OFFSET are passed to reg_save. */
1004 dwarf2out_reg_save (label, reg, offset)
1005 register char * label;
1006 register unsigned reg;
1007 register long offset;
1009 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
1012 /* Entry point for saving the return address in the stack.
1013 LABEL and OFFSET are passed to reg_save. */
1016 dwarf2out_return_save (label, offset)
1017 register char * label;
1018 register long offset;
1020 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1023 /* Entry point for saving the return address in a register.
1024 LABEL and SREG are passed to reg_save. */
1027 dwarf2out_return_reg (label, sreg)
1028 register char * label;
1029 register unsigned sreg;
1031 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1034 /* Record the initial position of the return address. RTL is
1035 INCOMING_RETURN_ADDR_RTX. */
1038 initial_return_save (rtl)
1044 switch (GET_CODE (rtl))
1047 /* RA is in a register. */
1048 reg = reg_number (rtl);
1051 /* RA is on the stack. */
1052 rtl = XEXP (rtl, 0);
1053 switch (GET_CODE (rtl))
1056 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1061 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1063 offset = INTVAL (XEXP (rtl, 1));
1066 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1068 offset = -INTVAL (XEXP (rtl, 1));
1075 /* The return address is at some offset from any value we can
1076 actually load. For instance, on the SPARC it is in %i7+8. Just
1077 ignore the offset for now; it doesn't matter for unwinding frames. */
1078 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1080 initial_return_save (XEXP (rtl, 0));
1086 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa_offset);
1089 /* Check INSN to see if it looks like a push or a stack adjustment, and
1090 make a note of it if it does. EH uses this information to find out how
1091 much extra space it needs to pop off the stack. */
1094 dwarf2out_stack_adjust (insn)
1100 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1102 /* Extract the size of the args from the CALL rtx itself. */
1104 insn = PATTERN (insn);
1105 if (GET_CODE (insn) == PARALLEL)
1106 insn = XVECEXP (insn, 0, 0);
1107 if (GET_CODE (insn) == SET)
1108 insn = SET_SRC (insn);
1109 assert (GET_CODE (insn) == CALL);
1110 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1114 /* If only calls can throw, and we have a frame pointer,
1115 save up adjustments until we see the CALL_INSN. */
1116 else if (! asynchronous_exceptions
1117 && cfa_reg != STACK_POINTER_REGNUM)
1120 if (GET_CODE (insn) == BARRIER)
1122 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1123 the compiler will have already emitted a stack adjustment, but
1124 doesn't bother for calls to noreturn functions. */
1125 #ifdef STACK_GROWS_DOWNWARD
1126 offset = -args_size;
1131 else if (GET_CODE (PATTERN (insn)) == SET)
1136 insn = PATTERN (insn);
1137 src = SET_SRC (insn);
1138 dest = SET_DEST (insn);
1140 if (dest == stack_pointer_rtx)
1142 /* (set (reg sp) (plus (reg sp) (const_int))) */
1143 code = GET_CODE (src);
1144 if (! (code == PLUS || code == MINUS)
1145 || XEXP (src, 0) != stack_pointer_rtx
1146 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1149 offset = INTVAL (XEXP (src, 1));
1151 else if (GET_CODE (dest) == MEM)
1153 /* (set (mem (pre_dec (reg sp))) (foo)) */
1154 src = XEXP (dest, 0);
1155 code = GET_CODE (src);
1157 if (! (code == PRE_DEC || code == PRE_INC)
1158 || XEXP (src, 0) != stack_pointer_rtx)
1161 offset = GET_MODE_SIZE (GET_MODE (dest));
1166 if (code == PLUS || code == PRE_INC)
1175 if (cfa_reg == STACK_POINTER_REGNUM)
1176 cfa_offset += offset;
1178 #ifndef STACK_GROWS_DOWNWARD
1181 args_size += offset;
1185 label = dwarf2out_cfi_label ();
1186 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1187 dwarf2out_args_size (label, args_size);
1190 /* Record call frame debugging information for INSN, which either
1191 sets SP or FP (adjusting how we calculate the frame address) or saves a
1192 register to the stack. If INSN is NULL_RTX, initialize our state. */
1195 dwarf2out_frame_debug (insn)
1202 /* A temporary register used in adjusting SP or setting up the store_reg. */
1203 static unsigned cfa_temp_reg;
1204 static long cfa_temp_value;
1206 if (insn == NULL_RTX)
1208 /* Set up state for generating call frame debug info. */
1209 lookup_cfa (&cfa_reg, &cfa_offset);
1210 if (cfa_reg != DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1212 cfa_reg = STACK_POINTER_REGNUM;
1213 cfa_store_reg = cfa_reg;
1214 cfa_store_offset = cfa_offset;
1220 if (! RTX_FRAME_RELATED_P (insn))
1222 dwarf2out_stack_adjust (insn);
1226 label = dwarf2out_cfi_label ();
1228 src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX);
1230 insn = XEXP (src, 0);
1232 insn = PATTERN (insn);
1234 /* Assume that in a PARALLEL prologue insn, only the first elt is
1235 significant. Currently this is true. */
1236 if (GET_CODE (insn) == PARALLEL)
1237 insn = XVECEXP (insn, 0, 0);
1238 if (GET_CODE (insn) != SET)
1241 src = SET_SRC (insn);
1242 dest = SET_DEST (insn);
1244 switch (GET_CODE (dest))
1247 /* Update the CFA rule wrt SP or FP. Make sure src is
1248 relative to the current CFA register. */
1249 switch (GET_CODE (src))
1251 /* Setting FP from SP. */
1253 if (cfa_reg != REGNO (src))
1255 if (REGNO (dest) != STACK_POINTER_REGNUM
1256 && !(frame_pointer_needed
1257 && REGNO (dest) == HARD_FRAME_POINTER_REGNUM))
1259 cfa_reg = REGNO (dest);
1264 if (dest == stack_pointer_rtx)
1267 switch (GET_CODE (XEXP (src, 1)))
1270 offset = INTVAL (XEXP (src, 1));
1273 if (REGNO (XEXP (src, 1)) != cfa_temp_reg)
1275 offset = cfa_temp_value;
1281 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1283 /* Restoring SP from FP in the epilogue. */
1284 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1286 cfa_reg = STACK_POINTER_REGNUM;
1288 else if (XEXP (src, 0) != stack_pointer_rtx)
1291 if (GET_CODE (src) == PLUS)
1293 if (cfa_reg == STACK_POINTER_REGNUM)
1294 cfa_offset += offset;
1295 if (cfa_store_reg == STACK_POINTER_REGNUM)
1296 cfa_store_offset += offset;
1298 else if (dest == hard_frame_pointer_rtx)
1300 /* Either setting the FP from an offset of the SP,
1301 or adjusting the FP */
1302 if (! frame_pointer_needed
1303 || REGNO (dest) != HARD_FRAME_POINTER_REGNUM)
1306 if (XEXP (src, 0) == stack_pointer_rtx
1307 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1309 if (cfa_reg != STACK_POINTER_REGNUM)
1311 offset = INTVAL (XEXP (src, 1));
1312 if (GET_CODE (src) == PLUS)
1314 cfa_offset += offset;
1315 cfa_reg = HARD_FRAME_POINTER_REGNUM;
1317 else if (XEXP (src, 0) == hard_frame_pointer_rtx
1318 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1320 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1322 offset = INTVAL (XEXP (src, 1));
1323 if (GET_CODE (src) == PLUS)
1325 cfa_offset += offset;
1333 if (GET_CODE (src) != PLUS
1334 || XEXP (src, 1) != stack_pointer_rtx)
1336 if (GET_CODE (XEXP (src, 0)) != REG
1337 || REGNO (XEXP (src, 0)) != cfa_temp_reg)
1339 if (cfa_reg != STACK_POINTER_REGNUM)
1341 cfa_store_reg = REGNO (dest);
1342 cfa_store_offset = cfa_offset - cfa_temp_value;
1347 cfa_temp_reg = REGNO (dest);
1348 cfa_temp_value = INTVAL (src);
1352 if (GET_CODE (XEXP (src, 0)) != REG
1353 || REGNO (XEXP (src, 0)) != cfa_temp_reg
1354 || REGNO (dest) != cfa_temp_reg
1355 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1357 cfa_temp_value |= INTVAL (XEXP (src, 1));
1363 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1367 /* Saving a register to the stack. Make sure dest is relative to the
1369 if (GET_CODE (src) != REG)
1371 switch (GET_CODE (XEXP (dest, 0)))
1376 offset = GET_MODE_SIZE (GET_MODE (dest));
1377 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1380 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1381 || cfa_store_reg != STACK_POINTER_REGNUM)
1383 cfa_store_offset += offset;
1384 if (cfa_reg == STACK_POINTER_REGNUM)
1385 cfa_offset = cfa_store_offset;
1387 offset = -cfa_store_offset;
1390 /* With an offset. */
1393 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1394 if (GET_CODE (src) == MINUS)
1397 if (cfa_store_reg != REGNO (XEXP (XEXP (dest, 0), 0)))
1399 offset -= cfa_store_offset;
1402 /* Without an offset. */
1404 if (cfa_store_reg != REGNO (XEXP (dest, 0)))
1406 offset = -cfa_store_offset;
1412 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1413 dwarf2out_reg_save (label, REGNO (src), offset);
1421 /* Return the size of an unsigned LEB128 quantity. */
1423 static inline unsigned long
1424 size_of_uleb128 (value)
1425 register unsigned long value;
1427 register unsigned long size = 0;
1428 register unsigned byte;
1432 byte = (value & 0x7f);
1441 /* Return the size of a signed LEB128 quantity. */
1443 static inline unsigned long
1444 size_of_sleb128 (value)
1445 register long value;
1447 register unsigned long size = 0;
1448 register unsigned byte;
1452 byte = (value & 0x7f);
1456 while (!(((value == 0) && ((byte & 0x40) == 0))
1457 || ((value == -1) && ((byte & 0x40) != 0))));
1462 /* Output an unsigned LEB128 quantity. */
1465 output_uleb128 (value)
1466 register unsigned long value;
1468 unsigned long save_value = value;
1470 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1473 register unsigned byte = (value & 0x7f);
1476 /* More bytes to follow. */
1479 fprintf (asm_out_file, "0x%x", byte);
1481 fprintf (asm_out_file, ",");
1486 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1489 /* Output an signed LEB128 quantity. */
1492 output_sleb128 (value)
1493 register long value;
1496 register unsigned byte;
1497 long save_value = value;
1499 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1502 byte = (value & 0x7f);
1503 /* arithmetic shift */
1505 more = !((((value == 0) && ((byte & 0x40) == 0))
1506 || ((value == -1) && ((byte & 0x40) != 0))));
1510 fprintf (asm_out_file, "0x%x", byte);
1512 fprintf (asm_out_file, ",");
1517 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1520 /* Output a Call Frame Information opcode and its operand(s). */
1523 output_cfi (cfi, fde)
1524 register dw_cfi_ref cfi;
1525 register dw_fde_ref fde;
1527 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1529 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1531 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1533 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1534 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1535 fputc ('\n', asm_out_file);
1538 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1540 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1542 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1544 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1545 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1547 fputc ('\n', asm_out_file);
1548 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1549 fputc ('\n', asm_out_file);
1551 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1553 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1555 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1557 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1558 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1560 fputc ('\n', asm_out_file);
1564 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1566 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1567 dwarf_cfi_name (cfi->dw_cfi_opc));
1569 fputc ('\n', asm_out_file);
1570 switch (cfi->dw_cfi_opc)
1572 case DW_CFA_set_loc:
1573 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1574 fputc ('\n', asm_out_file);
1576 case DW_CFA_advance_loc1:
1577 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1578 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1579 fde->dw_fde_current_label);
1580 fputc ('\n', asm_out_file);
1581 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1583 case DW_CFA_advance_loc2:
1584 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1585 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1586 fde->dw_fde_current_label);
1587 fputc ('\n', asm_out_file);
1588 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1590 case DW_CFA_advance_loc4:
1591 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1592 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1593 fde->dw_fde_current_label);
1594 fputc ('\n', asm_out_file);
1595 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1597 #ifdef MIPS_DEBUGGING_INFO
1598 case DW_CFA_MIPS_advance_loc8:
1599 /* TODO: not currently implemented. */
1603 case DW_CFA_offset_extended:
1604 case DW_CFA_def_cfa:
1605 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1606 fputc ('\n', asm_out_file);
1607 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1608 fputc ('\n', asm_out_file);
1610 case DW_CFA_restore_extended:
1611 case DW_CFA_undefined:
1612 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1613 fputc ('\n', asm_out_file);
1615 case DW_CFA_same_value:
1616 case DW_CFA_def_cfa_register:
1617 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1618 fputc ('\n', asm_out_file);
1620 case DW_CFA_register:
1621 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1622 fputc ('\n', asm_out_file);
1623 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1624 fputc ('\n', asm_out_file);
1626 case DW_CFA_def_cfa_offset:
1627 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1628 fputc ('\n', asm_out_file);
1630 case DW_CFA_GNU_window_save:
1632 case DW_CFA_GNU_args_size:
1633 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1634 fputc ('\n', asm_out_file);
1642 #if !defined (EH_FRAME_SECTION)
1643 #if defined (EH_FRAME_SECTION_ASM_OP)
1644 #define EH_FRAME_SECTION() eh_frame_section();
1646 #if defined (ASM_OUTPUT_SECTION_NAME)
1647 #define EH_FRAME_SECTION() \
1649 named_section (NULL_TREE, ".eh_frame", 0); \
1655 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
1656 #if !defined (HAS_INIT_SECTION) && !defined (INIT_SECTION_ASM_OP)
1657 #undef EH_FRAME_SECTION
1660 /* Output the call frame information used to used to record information
1661 that relates to calculating the frame pointer, and records the
1662 location of saved registers. */
1665 output_call_frame_info (for_eh)
1668 register unsigned long i;
1669 register dw_fde_ref fde;
1670 register dw_cfi_ref cfi;
1671 char l1[20], l2[20];
1672 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1676 /* Do we want to include a pointer to the exception table? */
1677 int eh_ptr = for_eh && exception_table_p ();
1679 fputc ('\n', asm_out_file);
1681 /* We're going to be generating comments, so turn on app. */
1687 #ifdef EH_FRAME_SECTION
1688 EH_FRAME_SECTION ();
1690 tree label = get_file_function_name ('F');
1693 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1694 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1695 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1697 assemble_label ("__FRAME_BEGIN__");
1700 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1702 /* Output the CIE. */
1703 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1704 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1705 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1706 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1708 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1710 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1713 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1715 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1718 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1721 fputc ('\n', asm_out_file);
1722 ASM_OUTPUT_LABEL (asm_out_file, l1);
1725 /* Now that the CIE pointer is PC-relative for EH,
1726 use 0 to identify the CIE. */
1727 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1729 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1732 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1734 fputc ('\n', asm_out_file);
1735 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1737 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1738 fputc ('\n', asm_out_file);
1741 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1743 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1745 fputc ('\n', asm_out_file);
1748 /* The CIE contains a pointer to the exception region info for the
1749 frame. Make the augmentation string three bytes (including the
1750 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1751 can't handle unaligned relocs. */
1754 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1755 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1759 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1761 fputc ('\n', asm_out_file);
1763 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1765 fprintf (asm_out_file, "\t%s pointer to exception region info",
1770 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1772 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1776 fputc ('\n', asm_out_file);
1779 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1781 fputc ('\n', asm_out_file);
1782 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1784 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1786 fputc ('\n', asm_out_file);
1787 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1789 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1791 fputc ('\n', asm_out_file);
1793 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1794 output_cfi (cfi, NULL);
1796 /* Pad the CIE out to an address sized boundary. */
1797 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1798 ASM_OUTPUT_LABEL (asm_out_file, l2);
1799 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1800 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1802 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1803 fputc ('\n', asm_out_file);
1806 /* Loop through all of the FDE's. */
1807 for (i = 0; i < fde_table_in_use; ++i)
1809 fde = &fde_table[i];
1811 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1812 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1813 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1814 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1816 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1818 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1821 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1823 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1826 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1827 fputc ('\n', asm_out_file);
1828 ASM_OUTPUT_LABEL (asm_out_file, l1);
1831 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l1, "__FRAME_BEGIN__");
1833 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1835 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1837 fputc ('\n', asm_out_file);
1838 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1840 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1842 fputc ('\n', asm_out_file);
1843 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1844 fde->dw_fde_end, fde->dw_fde_begin);
1846 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1848 fputc ('\n', asm_out_file);
1850 /* Loop through the Call Frame Instructions associated with
1852 fde->dw_fde_current_label = fde->dw_fde_begin;
1853 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1854 output_cfi (cfi, fde);
1856 /* Pad the FDE out to an address sized boundary. */
1857 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1858 ASM_OUTPUT_LABEL (asm_out_file, l2);
1859 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1860 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1862 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1863 fputc ('\n', asm_out_file);
1866 #ifndef EH_FRAME_SECTION
1869 /* Emit terminating zero for table. */
1870 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1871 fputc ('\n', asm_out_file);
1874 #ifdef MIPS_DEBUGGING_INFO
1875 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1876 get a value of 0. Putting .align 0 after the label fixes it. */
1877 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1880 /* Turn off app to make assembly quicker. */
1885 /* Output a marker (i.e. a label) for the beginning of a function, before
1889 dwarf2out_begin_prologue ()
1891 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1892 register dw_fde_ref fde;
1894 ++current_funcdef_number;
1896 function_section (current_function_decl);
1897 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1898 current_funcdef_number);
1899 ASM_OUTPUT_LABEL (asm_out_file, label);
1901 /* Expand the fde table if necessary. */
1902 if (fde_table_in_use == fde_table_allocated)
1904 fde_table_allocated += FDE_TABLE_INCREMENT;
1906 = (dw_fde_ref) xrealloc (fde_table,
1907 fde_table_allocated * sizeof (dw_fde_node));
1910 /* Record the FDE associated with this function. */
1911 current_funcdef_fde = fde_table_in_use;
1913 /* Add the new FDE at the end of the fde_table. */
1914 fde = &fde_table[fde_table_in_use++];
1915 fde->dw_fde_begin = xstrdup (label);
1916 fde->dw_fde_current_label = NULL;
1917 fde->dw_fde_end = NULL;
1918 fde->dw_fde_cfi = NULL;
1920 args_size = old_args_size = 0;
1923 /* Output a marker (i.e. a label) for the absolute end of the generated code
1924 for a function definition. This gets called *after* the epilogue code has
1928 dwarf2out_end_epilogue ()
1931 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1933 /* Output a label to mark the endpoint of the code generated for this
1935 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
1936 ASM_OUTPUT_LABEL (asm_out_file, label);
1937 fde = &fde_table[fde_table_in_use - 1];
1938 fde->dw_fde_end = xstrdup (label);
1942 dwarf2out_frame_init ()
1944 /* Allocate the initial hunk of the fde_table. */
1946 = (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1947 bzero ((char *) fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1948 fde_table_allocated = FDE_TABLE_INCREMENT;
1949 fde_table_in_use = 0;
1951 /* Generate the CFA instructions common to all FDE's. Do it now for the
1952 sake of lookup_cfa. */
1954 #ifdef DWARF2_UNWIND_INFO
1955 /* On entry, the Canonical Frame Address is at SP. */
1956 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
1957 initial_return_save (INCOMING_RETURN_ADDR_RTX);
1962 dwarf2out_frame_finish ()
1964 /* Output call frame information. */
1965 #ifdef MIPS_DEBUGGING_INFO
1966 if (write_symbols == DWARF2_DEBUG)
1967 output_call_frame_info (0);
1968 if (flag_exceptions && ! exceptions_via_longjmp)
1969 output_call_frame_info (1);
1971 if (write_symbols == DWARF2_DEBUG
1972 || (flag_exceptions && ! exceptions_via_longjmp))
1973 output_call_frame_info (1);
1977 #endif /* .debug_frame support */
1979 /* And now, the support for symbolic debugging information. */
1980 #ifdef DWARF2_DEBUGGING_INFO
1982 extern char *getpwd PROTO((void));
1984 /* NOTE: In the comments in this file, many references are made to
1985 "Debugging Information Entries". This term is abbreviated as `DIE'
1986 throughout the remainder of this file. */
1988 /* An internal representation of the DWARF output is built, and then
1989 walked to generate the DWARF debugging info. The walk of the internal
1990 representation is done after the entire program has been compiled.
1991 The types below are used to describe the internal representation. */
1993 /* Each DIE may have a series of attribute/value pairs. Values
1994 can take on several forms. The forms that are used in this
1995 implementation are listed below. */
2002 dw_val_class_unsigned_const,
2003 dw_val_class_long_long,
2006 dw_val_class_die_ref,
2007 dw_val_class_fde_ref,
2008 dw_val_class_lbl_id,
2009 dw_val_class_section_offset,
2014 /* Various DIE's use offsets relative to the beginning of the
2015 .debug_info section to refer to each other. */
2017 typedef long int dw_offset;
2019 /* Define typedefs here to avoid circular dependencies. */
2021 typedef struct die_struct *dw_die_ref;
2022 typedef struct dw_attr_struct *dw_attr_ref;
2023 typedef struct dw_val_struct *dw_val_ref;
2024 typedef struct dw_line_info_struct *dw_line_info_ref;
2025 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2026 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2027 typedef struct pubname_struct *pubname_ref;
2028 typedef dw_die_ref *arange_ref;
2030 /* Describe a double word constant value. */
2032 typedef struct dw_long_long_struct
2039 /* Describe a floating point constant value. */
2041 typedef struct dw_fp_struct
2048 /* Each entry in the line_info_table maintains the file and
2049 line number associated with the label generated for that
2050 entry. The label gives the PC value associated with
2051 the line number entry. */
2053 typedef struct dw_line_info_struct
2055 unsigned long dw_file_num;
2056 unsigned long dw_line_num;
2060 /* Line information for functions in separate sections; each one gets its
2062 typedef struct dw_separate_line_info_struct
2064 unsigned long dw_file_num;
2065 unsigned long dw_line_num;
2066 unsigned long function;
2068 dw_separate_line_info_entry;
2070 /* The dw_val_node describes an attribute's value, as it is
2071 represented internally. */
2073 typedef struct dw_val_struct
2075 dw_val_class val_class;
2079 dw_loc_descr_ref val_loc;
2081 long unsigned val_unsigned;
2082 dw_long_long_const val_long_long;
2083 dw_float_const val_float;
2084 dw_die_ref val_die_ref;
2085 unsigned val_fde_index;
2089 unsigned char val_flag;
2095 /* Locations in memory are described using a sequence of stack machine
2098 typedef struct dw_loc_descr_struct
2100 dw_loc_descr_ref dw_loc_next;
2101 enum dwarf_location_atom dw_loc_opc;
2102 dw_val_node dw_loc_oprnd1;
2103 dw_val_node dw_loc_oprnd2;
2107 /* Each DIE attribute has a field specifying the attribute kind,
2108 a link to the next attribute in the chain, and an attribute value.
2109 Attributes are typically linked below the DIE they modify. */
2111 typedef struct dw_attr_struct
2113 enum dwarf_attribute dw_attr;
2114 dw_attr_ref dw_attr_next;
2115 dw_val_node dw_attr_val;
2119 /* The Debugging Information Entry (DIE) structure */
2121 typedef struct die_struct
2123 enum dwarf_tag die_tag;
2124 dw_attr_ref die_attr;
2125 dw_attr_ref die_attr_last;
2126 dw_die_ref die_parent;
2127 dw_die_ref die_child;
2128 dw_die_ref die_child_last;
2130 dw_offset die_offset;
2131 unsigned long die_abbrev;
2135 /* The pubname structure */
2137 typedef struct pubname_struct
2144 /* The limbo die list structure. */
2145 typedef struct limbo_die_struct
2148 struct limbo_die_struct *next;
2152 /* How to start an assembler comment. */
2153 #ifndef ASM_COMMENT_START
2154 #define ASM_COMMENT_START ";#"
2157 /* Define a macro which returns non-zero for a TYPE_DECL which was
2158 implicitly generated for a tagged type.
2160 Note that unlike the gcc front end (which generates a NULL named
2161 TYPE_DECL node for each complete tagged type, each array type, and
2162 each function type node created) the g++ front end generates a
2163 _named_ TYPE_DECL node for each tagged type node created.
2164 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2165 generate a DW_TAG_typedef DIE for them. */
2167 #define TYPE_DECL_IS_STUB(decl) \
2168 (DECL_NAME (decl) == NULL_TREE \
2169 || (DECL_ARTIFICIAL (decl) \
2170 && is_tagged_type (TREE_TYPE (decl)) \
2171 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2172 /* This is necessary for stub decls that \
2173 appear in nested inline functions. */ \
2174 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2175 && (decl_ultimate_origin (decl) \
2176 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2178 /* Information concerning the compilation unit's programming
2179 language, and compiler version. */
2181 extern int flag_traditional;
2182 extern char *version_string;
2183 extern char *language_string;
2185 /* Fixed size portion of the DWARF compilation unit header. */
2186 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2188 /* Fixed size portion of debugging line information prolog. */
2189 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2191 /* Fixed size portion of public names info. */
2192 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2194 /* Fixed size portion of the address range info. */
2195 #define DWARF_ARANGES_HEADER_SIZE \
2196 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2198 /* Define the architecture-dependent minimum instruction length (in bytes).
2199 In this implementation of DWARF, this field is used for information
2200 purposes only. Since GCC generates assembly language, we have
2201 no a priori knowledge of how many instruction bytes are generated
2202 for each source line, and therefore can use only the DW_LNE_set_address
2203 and DW_LNS_fixed_advance_pc line information commands. */
2205 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2206 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2209 /* Minimum line offset in a special line info. opcode.
2210 This value was chosen to give a reasonable range of values. */
2211 #define DWARF_LINE_BASE -10
2213 /* First special line opcde - leave room for the standard opcodes. */
2214 #define DWARF_LINE_OPCODE_BASE 10
2216 /* Range of line offsets in a special line info. opcode. */
2217 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2219 /* Flag that indicates the initial value of the is_stmt_start flag.
2220 In the present implementation, we do not mark any lines as
2221 the beginning of a source statement, because that information
2222 is not made available by the GCC front-end. */
2223 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2225 /* This location is used by calc_die_sizes() to keep track
2226 the offset of each DIE within the .debug_info section. */
2227 static unsigned long next_die_offset;
2229 /* Record the root of the DIE's built for the current compilation unit. */
2230 static dw_die_ref comp_unit_die;
2232 /* A list of DIEs with a NULL parent waiting to be relocated. */
2233 static limbo_die_node *limbo_die_list = 0;
2235 /* Pointer to an array of filenames referenced by this compilation unit. */
2236 static char **file_table;
2238 /* Total number of entries in the table (i.e. array) pointed to by
2239 `file_table'. This is the *total* and includes both used and unused
2241 static unsigned file_table_allocated;
2243 /* Number of entries in the file_table which are actually in use. */
2244 static unsigned file_table_in_use;
2246 /* Size (in elements) of increments by which we may expand the filename
2248 #define FILE_TABLE_INCREMENT 64
2250 /* Local pointer to the name of the main input file. Initialized in
2252 static char *primary_filename;
2254 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2255 which their beginnings are encountered. We output Dwarf debugging info
2256 that refers to the beginnings and ends of the ranges of code for each
2257 lexical block. The labels themselves are generated in final.c, which
2258 assigns numbers to the blocks in the same way. */
2259 static unsigned next_block_number = 2;
2261 /* A pointer to the base of a table of references to DIE's that describe
2262 declarations. The table is indexed by DECL_UID() which is a unique
2263 number identifying each decl. */
2264 static dw_die_ref *decl_die_table;
2266 /* Number of elements currently allocated for the decl_die_table. */
2267 static unsigned decl_die_table_allocated;
2269 /* Number of elements in decl_die_table currently in use. */
2270 static unsigned decl_die_table_in_use;
2272 /* Size (in elements) of increments by which we may expand the
2274 #define DECL_DIE_TABLE_INCREMENT 256
2276 /* Structure used for the decl_scope table. scope is the current declaration
2277 scope, and previous is the entry that is the parent of this scope. This
2278 is usually but not always the immediately preceeding entry. */
2280 typedef struct decl_scope_struct
2287 /* A pointer to the base of a table of references to declaration
2288 scopes. This table is a display which tracks the nesting
2289 of declaration scopes at the current scope and containing
2290 scopes. This table is used to find the proper place to
2291 define type declaration DIE's. */
2292 static decl_scope_node *decl_scope_table;
2294 /* Number of elements currently allocated for the decl_scope_table. */
2295 static int decl_scope_table_allocated;
2297 /* Current level of nesting of declaration scopes. */
2298 static int decl_scope_depth;
2300 /* Size (in elements) of increments by which we may expand the
2301 decl_scope_table. */
2302 #define DECL_SCOPE_TABLE_INCREMENT 64
2304 /* A pointer to the base of a list of references to DIE's that
2305 are uniquely identified by their tag, presence/absence of
2306 children DIE's, and list of attribute/value pairs. */
2307 static dw_die_ref *abbrev_die_table;
2309 /* Number of elements currently allocated for abbrev_die_table. */
2310 static unsigned abbrev_die_table_allocated;
2312 /* Number of elements in type_die_table currently in use. */
2313 static unsigned abbrev_die_table_in_use;
2315 /* Size (in elements) of increments by which we may expand the
2316 abbrev_die_table. */
2317 #define ABBREV_DIE_TABLE_INCREMENT 256
2319 /* A pointer to the base of a table that contains line information
2320 for each source code line in .text in the compilation unit. */
2321 static dw_line_info_ref line_info_table;
2323 /* Number of elements currently allocated for line_info_table. */
2324 static unsigned line_info_table_allocated;
2326 /* Number of elements in separate_line_info_table currently in use. */
2327 static unsigned separate_line_info_table_in_use;
2329 /* A pointer to the base of a table that contains line information
2330 for each source code line outside of .text in the compilation unit. */
2331 static dw_separate_line_info_ref separate_line_info_table;
2333 /* Number of elements currently allocated for separate_line_info_table. */
2334 static unsigned separate_line_info_table_allocated;
2336 /* Number of elements in line_info_table currently in use. */
2337 static unsigned line_info_table_in_use;
2339 /* Size (in elements) of increments by which we may expand the
2341 #define LINE_INFO_TABLE_INCREMENT 1024
2343 /* A pointer to the base of a table that contains a list of publicly
2344 accessible names. */
2345 static pubname_ref pubname_table;
2347 /* Number of elements currently allocated for pubname_table. */
2348 static unsigned pubname_table_allocated;
2350 /* Number of elements in pubname_table currently in use. */
2351 static unsigned pubname_table_in_use;
2353 /* Size (in elements) of increments by which we may expand the
2355 #define PUBNAME_TABLE_INCREMENT 64
2357 /* A pointer to the base of a table that contains a list of publicly
2358 accessible names. */
2359 static arange_ref arange_table;
2361 /* Number of elements currently allocated for arange_table. */
2362 static unsigned arange_table_allocated;
2364 /* Number of elements in arange_table currently in use. */
2365 static unsigned arange_table_in_use;
2367 /* Size (in elements) of increments by which we may expand the
2369 #define ARANGE_TABLE_INCREMENT 64
2371 /* A pointer to the base of a list of pending types which we haven't
2372 generated DIEs for yet, but which we will have to come back to
2375 static tree *pending_types_list;
2377 /* Number of elements currently allocated for the pending_types_list. */
2378 static unsigned pending_types_allocated;
2380 /* Number of elements of pending_types_list currently in use. */
2381 static unsigned pending_types;
2383 /* Size (in elements) of increments by which we may expand the pending
2384 types list. Actually, a single hunk of space of this size should
2385 be enough for most typical programs. */
2386 #define PENDING_TYPES_INCREMENT 64
2388 /* Record whether the function being analyzed contains inlined functions. */
2389 static int current_function_has_inlines;
2390 #if 0 && defined (MIPS_DEBUGGING_INFO)
2391 static int comp_unit_has_inlines;
2394 /* A pointer to the ..._DECL node which we have most recently been working
2395 on. We keep this around just in case something about it looks screwy and
2396 we want to tell the user what the source coordinates for the actual
2398 static tree dwarf_last_decl;
2400 /* Forward declarations for functions defined in this file. */
2402 static void addr_const_to_string PROTO((dyn_string_t, rtx));
2403 static char *addr_to_string PROTO((rtx));
2404 static int is_pseudo_reg PROTO((rtx));
2405 static tree type_main_variant PROTO((tree));
2406 static int is_tagged_type PROTO((tree));
2407 static char *dwarf_tag_name PROTO((unsigned));
2408 static char *dwarf_attr_name PROTO((unsigned));
2409 static char *dwarf_form_name PROTO((unsigned));
2410 static char *dwarf_stack_op_name PROTO((unsigned));
2412 static char *dwarf_type_encoding_name PROTO((unsigned));
2414 static tree decl_ultimate_origin PROTO((tree));
2415 static tree block_ultimate_origin PROTO((tree));
2416 static tree decl_class_context PROTO((tree));
2417 static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
2418 static void add_AT_flag PROTO((dw_die_ref,
2419 enum dwarf_attribute,
2421 static void add_AT_int PROTO((dw_die_ref,
2422 enum dwarf_attribute, long));
2423 static void add_AT_unsigned PROTO((dw_die_ref,
2424 enum dwarf_attribute,
2426 static void add_AT_long_long PROTO((dw_die_ref,
2427 enum dwarf_attribute,
2428 unsigned long, unsigned long));
2429 static void add_AT_float PROTO((dw_die_ref,
2430 enum dwarf_attribute,
2432 static void add_AT_string PROTO((dw_die_ref,
2433 enum dwarf_attribute, char *));
2434 static void add_AT_die_ref PROTO((dw_die_ref,
2435 enum dwarf_attribute,
2437 static void add_AT_fde_ref PROTO((dw_die_ref,
2438 enum dwarf_attribute,
2440 static void add_AT_loc PROTO((dw_die_ref,
2441 enum dwarf_attribute,
2443 static void add_AT_addr PROTO((dw_die_ref,
2444 enum dwarf_attribute, char *));
2445 static void add_AT_lbl_id PROTO((dw_die_ref,
2446 enum dwarf_attribute, char *));
2447 static void add_AT_section_offset PROTO((dw_die_ref,
2448 enum dwarf_attribute, char *));
2449 static int is_extern_subr_die PROTO((dw_die_ref));
2450 static dw_attr_ref get_AT PROTO((dw_die_ref,
2451 enum dwarf_attribute));
2452 static char *get_AT_low_pc PROTO((dw_die_ref));
2453 static char *get_AT_hi_pc PROTO((dw_die_ref));
2454 static char *get_AT_string PROTO((dw_die_ref,
2455 enum dwarf_attribute));
2456 static int get_AT_flag PROTO((dw_die_ref,
2457 enum dwarf_attribute));
2458 static unsigned get_AT_unsigned PROTO((dw_die_ref,
2459 enum dwarf_attribute));
2460 static int is_c_family PROTO((void));
2461 static int is_fortran PROTO((void));
2462 static void remove_AT PROTO((dw_die_ref,
2463 enum dwarf_attribute));
2464 static void remove_children PROTO((dw_die_ref));
2465 static void add_child_die PROTO((dw_die_ref, dw_die_ref));
2466 static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
2467 static dw_die_ref lookup_type_die PROTO((tree));
2468 static void equate_type_number_to_die PROTO((tree, dw_die_ref));
2469 static dw_die_ref lookup_decl_die PROTO((tree));
2470 static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
2471 static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
2472 unsigned long, unsigned long));
2473 static void add_loc_descr PROTO((dw_loc_descr_ref *,
2475 static void print_spaces PROTO((FILE *));
2476 static void print_die PROTO((dw_die_ref, FILE *));
2477 static void print_dwarf_line_table PROTO((FILE *));
2478 static void add_sibling_attributes PROTO((dw_die_ref));
2479 static void build_abbrev_table PROTO((dw_die_ref));
2480 static unsigned long size_of_string PROTO((char *));
2481 static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
2482 static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
2483 static int constant_size PROTO((long unsigned));
2484 static unsigned long size_of_die PROTO((dw_die_ref));
2485 static void calc_die_sizes PROTO((dw_die_ref));
2486 static unsigned long size_of_line_prolog PROTO((void));
2487 static unsigned long size_of_line_info PROTO((void));
2488 static unsigned long size_of_pubnames PROTO((void));
2489 static unsigned long size_of_aranges PROTO((void));
2490 static enum dwarf_form value_format PROTO((dw_val_ref));
2491 static void output_value_format PROTO((dw_val_ref));
2492 static void output_abbrev_section PROTO((void));
2493 static void output_loc_operands PROTO((dw_loc_descr_ref));
2494 static unsigned long sibling_offset PROTO((dw_die_ref));
2495 static void output_die PROTO((dw_die_ref));
2496 static void output_compilation_unit_header PROTO((void));
2497 static char *dwarf2_name PROTO((tree, int));
2498 static void add_pubname PROTO((tree, dw_die_ref));
2499 static void output_pubnames PROTO((void));
2500 static void add_arange PROTO((tree, dw_die_ref));
2501 static void output_aranges PROTO((void));
2502 static void output_line_info PROTO((void));
2503 static int is_body_block PROTO((tree));
2504 static dw_die_ref base_type_die PROTO((tree));
2505 static tree root_type PROTO((tree));
2506 static int is_base_type PROTO((tree));
2507 static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
2508 static int type_is_enum PROTO((tree));
2509 static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
2510 static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
2511 static int is_based_loc PROTO((rtx));
2512 static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx));
2513 static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
2514 static dw_loc_descr_ref loc_descriptor PROTO((rtx));
2515 static unsigned ceiling PROTO((unsigned, unsigned));
2516 static tree field_type PROTO((tree));
2517 static unsigned simple_type_align_in_bits PROTO((tree));
2518 static unsigned simple_type_size_in_bits PROTO((tree));
2519 static unsigned field_byte_offset PROTO((tree));
2520 static void add_AT_location_description PROTO((dw_die_ref,
2521 enum dwarf_attribute, rtx));
2522 static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
2523 static void add_const_value_attribute PROTO((dw_die_ref, rtx));
2524 static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
2525 static void add_name_attribute PROTO((dw_die_ref, char *));
2526 static void add_bound_info PROTO((dw_die_ref,
2527 enum dwarf_attribute, tree));
2528 static void add_subscript_info PROTO((dw_die_ref, tree));
2529 static void add_byte_size_attribute PROTO((dw_die_ref, tree));
2530 static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
2531 static void add_bit_size_attribute PROTO((dw_die_ref, tree));
2532 static void add_prototyped_attribute PROTO((dw_die_ref, tree));
2533 static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
2534 static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
2535 static void add_src_coords_attributes PROTO((dw_die_ref, tree));
2536 static void add_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
2537 static void push_decl_scope PROTO((tree));
2538 static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
2539 static void pop_decl_scope PROTO((void));
2540 static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
2542 static char *type_tag PROTO((tree));
2543 static tree member_declared_type PROTO((tree));
2545 static char *decl_start_label PROTO((tree));
2547 static void gen_array_type_die PROTO((tree, dw_die_ref));
2548 static void gen_set_type_die PROTO((tree, dw_die_ref));
2550 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2552 static void pend_type PROTO((tree));
2553 static void output_pending_types_for_scope PROTO((dw_die_ref));
2554 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2555 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2556 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2557 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2558 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2559 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2560 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2561 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2562 static void gen_variable_die PROTO((tree, dw_die_ref));
2563 static void gen_label_die PROTO((tree, dw_die_ref));
2564 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2565 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2566 static void gen_field_die PROTO((tree, dw_die_ref));
2567 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2568 static void gen_compile_unit_die PROTO((char *));
2569 static void gen_string_type_die PROTO((tree, dw_die_ref));
2570 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2571 static void gen_member_die PROTO((tree, dw_die_ref));
2572 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2573 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2574 static void gen_typedef_die PROTO((tree, dw_die_ref));
2575 static void gen_type_die PROTO((tree, dw_die_ref));
2576 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2577 static void gen_block_die PROTO((tree, dw_die_ref, int));
2578 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2579 static int is_redundant_typedef PROTO((tree));
2580 static void gen_decl_die PROTO((tree, dw_die_ref));
2581 static unsigned lookup_filename PROTO((char *));
2583 /* Section names used to hold DWARF debugging information. */
2584 #ifndef DEBUG_INFO_SECTION
2585 #define DEBUG_INFO_SECTION ".debug_info"
2587 #ifndef ABBREV_SECTION
2588 #define ABBREV_SECTION ".debug_abbrev"
2590 #ifndef ARANGES_SECTION
2591 #define ARANGES_SECTION ".debug_aranges"
2593 #ifndef DW_MACINFO_SECTION
2594 #define DW_MACINFO_SECTION ".debug_macinfo"
2596 #ifndef DEBUG_LINE_SECTION
2597 #define DEBUG_LINE_SECTION ".debug_line"
2600 #define LOC_SECTION ".debug_loc"
2602 #ifndef PUBNAMES_SECTION
2603 #define PUBNAMES_SECTION ".debug_pubnames"
2606 #define STR_SECTION ".debug_str"
2609 /* Standard ELF section names for compiled code and data. */
2610 #ifndef TEXT_SECTION
2611 #define TEXT_SECTION ".text"
2613 #ifndef DATA_SECTION
2614 #define DATA_SECTION ".data"
2617 #define BSS_SECTION ".bss"
2621 /* Definitions of defaults for formats and names of various special
2622 (artificial) labels which may be generated within this file (when the -g
2623 options is used and DWARF_DEBUGGING_INFO is in effect.
2624 If necessary, these may be overridden from within the tm.h file, but
2625 typically, overriding these defaults is unnecessary. */
2627 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2629 #ifndef TEXT_END_LABEL
2630 #define TEXT_END_LABEL "Letext"
2632 #ifndef DATA_END_LABEL
2633 #define DATA_END_LABEL "Ledata"
2635 #ifndef BSS_END_LABEL
2636 #define BSS_END_LABEL "Lebss"
2638 #ifndef INSN_LABEL_FMT
2639 #define INSN_LABEL_FMT "LI%u_"
2641 #ifndef BLOCK_BEGIN_LABEL
2642 #define BLOCK_BEGIN_LABEL "LBB"
2644 #ifndef BLOCK_END_LABEL
2645 #define BLOCK_END_LABEL "LBE"
2647 #ifndef BODY_BEGIN_LABEL
2648 #define BODY_BEGIN_LABEL "Lbb"
2650 #ifndef BODY_END_LABEL
2651 #define BODY_END_LABEL "Lbe"
2653 #ifndef LINE_CODE_LABEL
2654 #define LINE_CODE_LABEL "LM"
2656 #ifndef SEPARATE_LINE_CODE_LABEL
2657 #define SEPARATE_LINE_CODE_LABEL "LSM"
2660 /* Convert a reference to the assembler name of a C-level name. This
2661 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2662 a string rather than writing to a file. */
2663 #ifndef ASM_NAME_TO_STRING
2664 #define ASM_NAME_TO_STRING(STR, NAME) \
2666 if ((NAME)[0] == '*') \
2667 dyn_string_append (STR, NAME + 1); \
2669 dyn_string_append (STR, NAME); \
2674 /* Convert an integer constant expression into assembler syntax. Addition
2675 and subtraction are the only arithmetic that may appear in these
2676 expressions. This is an adaptation of output_addr_const in final.c.
2677 Here, the target of the conversion is a string buffer. We can't use
2678 output_addr_const directly, because it writes to a file. */
2681 addr_const_to_string (str, x)
2688 switch (GET_CODE (x))
2692 dyn_string_append (str, ",");
2698 ASM_NAME_TO_STRING (str, XSTR (x, 0));
2702 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2703 ASM_NAME_TO_STRING (str, buf1);
2707 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2708 ASM_NAME_TO_STRING (str, buf1);
2712 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2713 dyn_string_append (str, buf1);
2717 /* This used to output parentheses around the expression, but that does
2718 not work on the 386 (either ATT or BSD assembler). */
2719 addr_const_to_string (str, XEXP (x, 0));
2723 if (GET_MODE (x) == VOIDmode)
2725 /* We can use %d if the number is one word and positive. */
2726 if (CONST_DOUBLE_HIGH (x))
2727 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2728 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2729 else if (CONST_DOUBLE_LOW (x) < 0)
2730 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2732 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2733 CONST_DOUBLE_LOW (x));
2734 dyn_string_append (str, buf1);
2737 /* We can't handle floating point constants; PRINT_OPERAND must
2739 output_operand_lossage ("floating constant misused");
2743 /* Some assemblers need integer constants to appear last (eg masm). */
2744 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2746 addr_const_to_string (str, XEXP (x, 1));
2747 if (INTVAL (XEXP (x, 0)) >= 0)
2748 dyn_string_append (str, "+");
2750 addr_const_to_string (str, XEXP (x, 0));
2754 addr_const_to_string (str, XEXP (x, 0));
2755 if (INTVAL (XEXP (x, 1)) >= 0)
2756 dyn_string_append (str, "+");
2758 addr_const_to_string (str, XEXP (x, 1));
2763 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2764 can't handle that. */
2765 x = simplify_subtraction (x);
2766 if (GET_CODE (x) != MINUS)
2769 addr_const_to_string (str, XEXP (x, 0));
2770 dyn_string_append (str, "-");
2771 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2772 && INTVAL (XEXP (x, 1)) < 0)
2774 dyn_string_append (str, ASM_OPEN_PAREN);
2775 addr_const_to_string (str, XEXP (x, 1));
2776 dyn_string_append (str, ASM_CLOSE_PAREN);
2779 addr_const_to_string (str, XEXP (x, 1));
2784 addr_const_to_string (str, XEXP (x, 0));
2788 output_operand_lossage ("invalid expression as operand");
2792 /* Convert an address constant to a string, and return a pointer to
2793 a copy of the result, located on the heap. */
2799 dyn_string_t ds = dyn_string_new (256);
2802 addr_const_to_string (ds, x);
2804 /* Return the dynamically allocated string, but free the
2805 dyn_string_t itself. */
2811 /* Test if rtl node points to a pseudo register. */
2817 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2818 || ((GET_CODE (rtl) == SUBREG)
2819 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2822 /* Return a reference to a type, with its const and volatile qualifiers
2826 type_main_variant (type)
2829 type = TYPE_MAIN_VARIANT (type);
2831 /* There really should be only one main variant among any group of variants
2832 of a given type (and all of the MAIN_VARIANT values for all members of
2833 the group should point to that one type) but sometimes the C front-end
2834 messes this up for array types, so we work around that bug here. */
2836 if (TREE_CODE (type) == ARRAY_TYPE)
2837 while (type != TYPE_MAIN_VARIANT (type))
2838 type = TYPE_MAIN_VARIANT (type);
2843 /* Return non-zero if the given type node represents a tagged type. */
2846 is_tagged_type (type)
2849 register enum tree_code code = TREE_CODE (type);
2851 return (code == RECORD_TYPE || code == UNION_TYPE
2852 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2855 /* Convert a DIE tag into its string name. */
2858 dwarf_tag_name (tag)
2859 register unsigned tag;
2863 case DW_TAG_padding:
2864 return "DW_TAG_padding";
2865 case DW_TAG_array_type:
2866 return "DW_TAG_array_type";
2867 case DW_TAG_class_type:
2868 return "DW_TAG_class_type";
2869 case DW_TAG_entry_point:
2870 return "DW_TAG_entry_point";
2871 case DW_TAG_enumeration_type:
2872 return "DW_TAG_enumeration_type";
2873 case DW_TAG_formal_parameter:
2874 return "DW_TAG_formal_parameter";
2875 case DW_TAG_imported_declaration:
2876 return "DW_TAG_imported_declaration";
2878 return "DW_TAG_label";
2879 case DW_TAG_lexical_block:
2880 return "DW_TAG_lexical_block";
2882 return "DW_TAG_member";
2883 case DW_TAG_pointer_type:
2884 return "DW_TAG_pointer_type";
2885 case DW_TAG_reference_type:
2886 return "DW_TAG_reference_type";
2887 case DW_TAG_compile_unit:
2888 return "DW_TAG_compile_unit";
2889 case DW_TAG_string_type:
2890 return "DW_TAG_string_type";
2891 case DW_TAG_structure_type:
2892 return "DW_TAG_structure_type";
2893 case DW_TAG_subroutine_type:
2894 return "DW_TAG_subroutine_type";
2895 case DW_TAG_typedef:
2896 return "DW_TAG_typedef";
2897 case DW_TAG_union_type:
2898 return "DW_TAG_union_type";
2899 case DW_TAG_unspecified_parameters:
2900 return "DW_TAG_unspecified_parameters";
2901 case DW_TAG_variant:
2902 return "DW_TAG_variant";
2903 case DW_TAG_common_block:
2904 return "DW_TAG_common_block";
2905 case DW_TAG_common_inclusion:
2906 return "DW_TAG_common_inclusion";
2907 case DW_TAG_inheritance:
2908 return "DW_TAG_inheritance";
2909 case DW_TAG_inlined_subroutine:
2910 return "DW_TAG_inlined_subroutine";
2912 return "DW_TAG_module";
2913 case DW_TAG_ptr_to_member_type:
2914 return "DW_TAG_ptr_to_member_type";
2915 case DW_TAG_set_type:
2916 return "DW_TAG_set_type";
2917 case DW_TAG_subrange_type:
2918 return "DW_TAG_subrange_type";
2919 case DW_TAG_with_stmt:
2920 return "DW_TAG_with_stmt";
2921 case DW_TAG_access_declaration:
2922 return "DW_TAG_access_declaration";
2923 case DW_TAG_base_type:
2924 return "DW_TAG_base_type";
2925 case DW_TAG_catch_block:
2926 return "DW_TAG_catch_block";
2927 case DW_TAG_const_type:
2928 return "DW_TAG_const_type";
2929 case DW_TAG_constant:
2930 return "DW_TAG_constant";
2931 case DW_TAG_enumerator:
2932 return "DW_TAG_enumerator";
2933 case DW_TAG_file_type:
2934 return "DW_TAG_file_type";
2936 return "DW_TAG_friend";
2937 case DW_TAG_namelist:
2938 return "DW_TAG_namelist";
2939 case DW_TAG_namelist_item:
2940 return "DW_TAG_namelist_item";
2941 case DW_TAG_packed_type:
2942 return "DW_TAG_packed_type";
2943 case DW_TAG_subprogram:
2944 return "DW_TAG_subprogram";
2945 case DW_TAG_template_type_param:
2946 return "DW_TAG_template_type_param";
2947 case DW_TAG_template_value_param:
2948 return "DW_TAG_template_value_param";
2949 case DW_TAG_thrown_type:
2950 return "DW_TAG_thrown_type";
2951 case DW_TAG_try_block:
2952 return "DW_TAG_try_block";
2953 case DW_TAG_variant_part:
2954 return "DW_TAG_variant_part";
2955 case DW_TAG_variable:
2956 return "DW_TAG_variable";
2957 case DW_TAG_volatile_type:
2958 return "DW_TAG_volatile_type";
2959 case DW_TAG_MIPS_loop:
2960 return "DW_TAG_MIPS_loop";
2961 case DW_TAG_format_label:
2962 return "DW_TAG_format_label";
2963 case DW_TAG_function_template:
2964 return "DW_TAG_function_template";
2965 case DW_TAG_class_template:
2966 return "DW_TAG_class_template";
2968 return "DW_TAG_<unknown>";
2972 /* Convert a DWARF attribute code into its string name. */
2975 dwarf_attr_name (attr)
2976 register unsigned attr;
2981 return "DW_AT_sibling";
2982 case DW_AT_location:
2983 return "DW_AT_location";
2985 return "DW_AT_name";
2986 case DW_AT_ordering:
2987 return "DW_AT_ordering";
2988 case DW_AT_subscr_data:
2989 return "DW_AT_subscr_data";
2990 case DW_AT_byte_size:
2991 return "DW_AT_byte_size";
2992 case DW_AT_bit_offset:
2993 return "DW_AT_bit_offset";
2994 case DW_AT_bit_size:
2995 return "DW_AT_bit_size";
2996 case DW_AT_element_list:
2997 return "DW_AT_element_list";
2998 case DW_AT_stmt_list:
2999 return "DW_AT_stmt_list";
3001 return "DW_AT_low_pc";
3003 return "DW_AT_high_pc";
3004 case DW_AT_language:
3005 return "DW_AT_language";
3007 return "DW_AT_member";
3009 return "DW_AT_discr";
3010 case DW_AT_discr_value:
3011 return "DW_AT_discr_value";
3012 case DW_AT_visibility:
3013 return "DW_AT_visibility";
3015 return "DW_AT_import";
3016 case DW_AT_string_length:
3017 return "DW_AT_string_length";
3018 case DW_AT_common_reference:
3019 return "DW_AT_common_reference";
3020 case DW_AT_comp_dir:
3021 return "DW_AT_comp_dir";
3022 case DW_AT_const_value:
3023 return "DW_AT_const_value";
3024 case DW_AT_containing_type:
3025 return "DW_AT_containing_type";
3026 case DW_AT_default_value:
3027 return "DW_AT_default_value";
3029 return "DW_AT_inline";
3030 case DW_AT_is_optional:
3031 return "DW_AT_is_optional";
3032 case DW_AT_lower_bound:
3033 return "DW_AT_lower_bound";
3034 case DW_AT_producer:
3035 return "DW_AT_producer";
3036 case DW_AT_prototyped:
3037 return "DW_AT_prototyped";
3038 case DW_AT_return_addr:
3039 return "DW_AT_return_addr";
3040 case DW_AT_start_scope:
3041 return "DW_AT_start_scope";
3042 case DW_AT_stride_size:
3043 return "DW_AT_stride_size";
3044 case DW_AT_upper_bound:
3045 return "DW_AT_upper_bound";
3046 case DW_AT_abstract_origin:
3047 return "DW_AT_abstract_origin";
3048 case DW_AT_accessibility:
3049 return "DW_AT_accessibility";
3050 case DW_AT_address_class:
3051 return "DW_AT_address_class";
3052 case DW_AT_artificial:
3053 return "DW_AT_artificial";
3054 case DW_AT_base_types:
3055 return "DW_AT_base_types";
3056 case DW_AT_calling_convention:
3057 return "DW_AT_calling_convention";
3059 return "DW_AT_count";
3060 case DW_AT_data_member_location:
3061 return "DW_AT_data_member_location";
3062 case DW_AT_decl_column:
3063 return "DW_AT_decl_column";
3064 case DW_AT_decl_file:
3065 return "DW_AT_decl_file";
3066 case DW_AT_decl_line:
3067 return "DW_AT_decl_line";
3068 case DW_AT_declaration:
3069 return "DW_AT_declaration";
3070 case DW_AT_discr_list:
3071 return "DW_AT_discr_list";
3072 case DW_AT_encoding:
3073 return "DW_AT_encoding";
3074 case DW_AT_external:
3075 return "DW_AT_external";
3076 case DW_AT_frame_base:
3077 return "DW_AT_frame_base";
3079 return "DW_AT_friend";
3080 case DW_AT_identifier_case:
3081 return "DW_AT_identifier_case";
3082 case DW_AT_macro_info:
3083 return "DW_AT_macro_info";
3084 case DW_AT_namelist_items:
3085 return "DW_AT_namelist_items";
3086 case DW_AT_priority:
3087 return "DW_AT_priority";
3089 return "DW_AT_segment";
3090 case DW_AT_specification:
3091 return "DW_AT_specification";
3092 case DW_AT_static_link:
3093 return "DW_AT_static_link";
3095 return "DW_AT_type";
3096 case DW_AT_use_location:
3097 return "DW_AT_use_location";
3098 case DW_AT_variable_parameter:
3099 return "DW_AT_variable_parameter";
3100 case DW_AT_virtuality:
3101 return "DW_AT_virtuality";
3102 case DW_AT_vtable_elem_location:
3103 return "DW_AT_vtable_elem_location";
3105 case DW_AT_MIPS_fde:
3106 return "DW_AT_MIPS_fde";
3107 case DW_AT_MIPS_loop_begin:
3108 return "DW_AT_MIPS_loop_begin";
3109 case DW_AT_MIPS_tail_loop_begin:
3110 return "DW_AT_MIPS_tail_loop_begin";
3111 case DW_AT_MIPS_epilog_begin:
3112 return "DW_AT_MIPS_epilog_begin";
3113 case DW_AT_MIPS_loop_unroll_factor:
3114 return "DW_AT_MIPS_loop_unroll_factor";
3115 case DW_AT_MIPS_software_pipeline_depth:
3116 return "DW_AT_MIPS_software_pipeline_depth";
3117 case DW_AT_MIPS_linkage_name:
3118 return "DW_AT_MIPS_linkage_name";
3119 case DW_AT_MIPS_stride:
3120 return "DW_AT_MIPS_stride";
3121 case DW_AT_MIPS_abstract_name:
3122 return "DW_AT_MIPS_abstract_name";
3123 case DW_AT_MIPS_clone_origin:
3124 return "DW_AT_MIPS_clone_origin";
3125 case DW_AT_MIPS_has_inlines:
3126 return "DW_AT_MIPS_has_inlines";
3128 case DW_AT_sf_names:
3129 return "DW_AT_sf_names";
3130 case DW_AT_src_info:
3131 return "DW_AT_src_info";
3132 case DW_AT_mac_info:
3133 return "DW_AT_mac_info";
3134 case DW_AT_src_coords:
3135 return "DW_AT_src_coords";
3136 case DW_AT_body_begin:
3137 return "DW_AT_body_begin";
3138 case DW_AT_body_end:
3139 return "DW_AT_body_end";
3141 return "DW_AT_<unknown>";
3145 /* Convert a DWARF value form code into its string name. */
3148 dwarf_form_name (form)
3149 register unsigned form;
3154 return "DW_FORM_addr";
3155 case DW_FORM_block2:
3156 return "DW_FORM_block2";
3157 case DW_FORM_block4:
3158 return "DW_FORM_block4";
3160 return "DW_FORM_data2";
3162 return "DW_FORM_data4";
3164 return "DW_FORM_data8";
3165 case DW_FORM_string:
3166 return "DW_FORM_string";
3168 return "DW_FORM_block";
3169 case DW_FORM_block1:
3170 return "DW_FORM_block1";
3172 return "DW_FORM_data1";
3174 return "DW_FORM_flag";
3176 return "DW_FORM_sdata";
3178 return "DW_FORM_strp";
3180 return "DW_FORM_udata";
3181 case DW_FORM_ref_addr:
3182 return "DW_FORM_ref_addr";
3184 return "DW_FORM_ref1";
3186 return "DW_FORM_ref2";
3188 return "DW_FORM_ref4";
3190 return "DW_FORM_ref8";
3191 case DW_FORM_ref_udata:
3192 return "DW_FORM_ref_udata";
3193 case DW_FORM_indirect:
3194 return "DW_FORM_indirect";
3196 return "DW_FORM_<unknown>";
3200 /* Convert a DWARF stack opcode into its string name. */
3203 dwarf_stack_op_name (op)
3204 register unsigned op;
3209 return "DW_OP_addr";
3211 return "DW_OP_deref";
3213 return "DW_OP_const1u";
3215 return "DW_OP_const1s";
3217 return "DW_OP_const2u";
3219 return "DW_OP_const2s";
3221 return "DW_OP_const4u";
3223 return "DW_OP_const4s";
3225 return "DW_OP_const8u";
3227 return "DW_OP_const8s";
3229 return "DW_OP_constu";
3231 return "DW_OP_consts";
3235 return "DW_OP_drop";
3237 return "DW_OP_over";
3239 return "DW_OP_pick";
3241 return "DW_OP_swap";
3245 return "DW_OP_xderef";
3253 return "DW_OP_minus";
3265 return "DW_OP_plus";
3266 case DW_OP_plus_uconst:
3267 return "DW_OP_plus_uconst";
3273 return "DW_OP_shra";
3291 return "DW_OP_skip";
3293 return "DW_OP_lit0";
3295 return "DW_OP_lit1";
3297 return "DW_OP_lit2";
3299 return "DW_OP_lit3";
3301 return "DW_OP_lit4";
3303 return "DW_OP_lit5";
3305 return "DW_OP_lit6";
3307 return "DW_OP_lit7";
3309 return "DW_OP_lit8";
3311 return "DW_OP_lit9";
3313 return "DW_OP_lit10";
3315 return "DW_OP_lit11";
3317 return "DW_OP_lit12";
3319 return "DW_OP_lit13";
3321 return "DW_OP_lit14";
3323 return "DW_OP_lit15";
3325 return "DW_OP_lit16";
3327 return "DW_OP_lit17";
3329 return "DW_OP_lit18";
3331 return "DW_OP_lit19";
3333 return "DW_OP_lit20";
3335 return "DW_OP_lit21";
3337 return "DW_OP_lit22";
3339 return "DW_OP_lit23";
3341 return "DW_OP_lit24";
3343 return "DW_OP_lit25";
3345 return "DW_OP_lit26";
3347 return "DW_OP_lit27";
3349 return "DW_OP_lit28";
3351 return "DW_OP_lit29";
3353 return "DW_OP_lit30";
3355 return "DW_OP_lit31";
3357 return "DW_OP_reg0";
3359 return "DW_OP_reg1";
3361 return "DW_OP_reg2";
3363 return "DW_OP_reg3";
3365 return "DW_OP_reg4";
3367 return "DW_OP_reg5";
3369 return "DW_OP_reg6";
3371 return "DW_OP_reg7";
3373 return "DW_OP_reg8";
3375 return "DW_OP_reg9";
3377 return "DW_OP_reg10";
3379 return "DW_OP_reg11";
3381 return "DW_OP_reg12";
3383 return "DW_OP_reg13";
3385 return "DW_OP_reg14";
3387 return "DW_OP_reg15";
3389 return "DW_OP_reg16";
3391 return "DW_OP_reg17";
3393 return "DW_OP_reg18";
3395 return "DW_OP_reg19";
3397 return "DW_OP_reg20";
3399 return "DW_OP_reg21";
3401 return "DW_OP_reg22";
3403 return "DW_OP_reg23";
3405 return "DW_OP_reg24";
3407 return "DW_OP_reg25";
3409 return "DW_OP_reg26";
3411 return "DW_OP_reg27";
3413 return "DW_OP_reg28";
3415 return "DW_OP_reg29";
3417 return "DW_OP_reg30";
3419 return "DW_OP_reg31";
3421 return "DW_OP_breg0";
3423 return "DW_OP_breg1";
3425 return "DW_OP_breg2";
3427 return "DW_OP_breg3";
3429 return "DW_OP_breg4";
3431 return "DW_OP_breg5";
3433 return "DW_OP_breg6";
3435 return "DW_OP_breg7";
3437 return "DW_OP_breg8";
3439 return "DW_OP_breg9";
3441 return "DW_OP_breg10";
3443 return "DW_OP_breg11";
3445 return "DW_OP_breg12";
3447 return "DW_OP_breg13";
3449 return "DW_OP_breg14";
3451 return "DW_OP_breg15";
3453 return "DW_OP_breg16";
3455 return "DW_OP_breg17";
3457 return "DW_OP_breg18";
3459 return "DW_OP_breg19";
3461 return "DW_OP_breg20";
3463 return "DW_OP_breg21";
3465 return "DW_OP_breg22";
3467 return "DW_OP_breg23";
3469 return "DW_OP_breg24";
3471 return "DW_OP_breg25";
3473 return "DW_OP_breg26";
3475 return "DW_OP_breg27";
3477 return "DW_OP_breg28";
3479 return "DW_OP_breg29";
3481 return "DW_OP_breg30";
3483 return "DW_OP_breg31";
3485 return "DW_OP_regx";
3487 return "DW_OP_fbreg";
3489 return "DW_OP_bregx";
3491 return "DW_OP_piece";
3492 case DW_OP_deref_size:
3493 return "DW_OP_deref_size";
3494 case DW_OP_xderef_size:
3495 return "DW_OP_xderef_size";
3499 return "OP_<unknown>";
3503 /* Convert a DWARF type code into its string name. */
3507 dwarf_type_encoding_name (enc)
3508 register unsigned enc;
3512 case DW_ATE_address:
3513 return "DW_ATE_address";
3514 case DW_ATE_boolean:
3515 return "DW_ATE_boolean";
3516 case DW_ATE_complex_float:
3517 return "DW_ATE_complex_float";
3519 return "DW_ATE_float";
3521 return "DW_ATE_signed";
3522 case DW_ATE_signed_char:
3523 return "DW_ATE_signed_char";
3524 case DW_ATE_unsigned:
3525 return "DW_ATE_unsigned";
3526 case DW_ATE_unsigned_char:
3527 return "DW_ATE_unsigned_char";
3529 return "DW_ATE_<unknown>";
3534 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3535 instance of an inlined instance of a decl which is local to an inline
3536 function, so we have to trace all of the way back through the origin chain
3537 to find out what sort of node actually served as the original seed for the
3541 decl_ultimate_origin (decl)
3544 #ifdef ENABLE_CHECKING
3545 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
3546 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
3547 most distant ancestor, this should never happen. */
3551 return DECL_ABSTRACT_ORIGIN (decl);
3554 /* Determine the "ultimate origin" of a block. The block may be an inlined
3555 instance of an inlined instance of a block which is local to an inline
3556 function, so we have to trace all of the way back through the origin chain
3557 to find out what sort of node actually served as the original seed for the
3561 block_ultimate_origin (block)
3562 register tree block;
3564 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3566 if (immediate_origin == NULL_TREE)
3570 register tree ret_val;
3571 register tree lookahead = immediate_origin;
3575 ret_val = lookahead;
3576 lookahead = (TREE_CODE (ret_val) == BLOCK)
3577 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3580 while (lookahead != NULL && lookahead != ret_val);
3586 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3587 of a virtual function may refer to a base class, so we check the 'this'
3591 decl_class_context (decl)
3594 tree context = NULL_TREE;
3596 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3597 context = DECL_CONTEXT (decl);
3599 context = TYPE_MAIN_VARIANT
3600 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3602 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3603 context = NULL_TREE;
3608 /* Add an attribute/value pair to a DIE */
3611 add_dwarf_attr (die, attr)
3612 register dw_die_ref die;
3613 register dw_attr_ref attr;
3615 if (die != NULL && attr != NULL)
3617 if (die->die_attr == NULL)
3619 die->die_attr = attr;
3620 die->die_attr_last = attr;
3624 die->die_attr_last->dw_attr_next = attr;
3625 die->die_attr_last = attr;
3630 /* Add a flag value attribute to a DIE. */
3633 add_AT_flag (die, attr_kind, flag)
3634 register dw_die_ref die;
3635 register enum dwarf_attribute attr_kind;
3636 register unsigned flag;
3638 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3640 attr->dw_attr_next = NULL;
3641 attr->dw_attr = attr_kind;
3642 attr->dw_attr_val.val_class = dw_val_class_flag;
3643 attr->dw_attr_val.v.val_flag = flag;
3644 add_dwarf_attr (die, attr);
3647 /* Add a signed integer attribute value to a DIE. */
3650 add_AT_int (die, attr_kind, int_val)
3651 register dw_die_ref die;
3652 register enum dwarf_attribute attr_kind;
3653 register long int int_val;
3655 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3657 attr->dw_attr_next = NULL;
3658 attr->dw_attr = attr_kind;
3659 attr->dw_attr_val.val_class = dw_val_class_const;
3660 attr->dw_attr_val.v.val_int = int_val;
3661 add_dwarf_attr (die, attr);
3664 /* Add an unsigned integer attribute value to a DIE. */
3667 add_AT_unsigned (die, attr_kind, unsigned_val)
3668 register dw_die_ref die;
3669 register enum dwarf_attribute attr_kind;
3670 register unsigned long unsigned_val;
3672 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3674 attr->dw_attr_next = NULL;
3675 attr->dw_attr = attr_kind;
3676 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
3677 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3678 add_dwarf_attr (die, attr);
3681 /* Add an unsigned double integer attribute value to a DIE. */
3684 add_AT_long_long (die, attr_kind, val_hi, val_low)
3685 register dw_die_ref die;
3686 register enum dwarf_attribute attr_kind;
3687 register unsigned long val_hi;
3688 register unsigned long val_low;
3690 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3692 attr->dw_attr_next = NULL;
3693 attr->dw_attr = attr_kind;
3694 attr->dw_attr_val.val_class = dw_val_class_long_long;
3695 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3696 attr->dw_attr_val.v.val_long_long.low = val_low;
3697 add_dwarf_attr (die, attr);
3700 /* Add a floating point attribute value to a DIE and return it. */
3703 add_AT_float (die, attr_kind, length, array)
3704 register dw_die_ref die;
3705 register enum dwarf_attribute attr_kind;
3706 register unsigned length;
3707 register long *array;
3709 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3711 attr->dw_attr_next = NULL;
3712 attr->dw_attr = attr_kind;
3713 attr->dw_attr_val.val_class = dw_val_class_float;
3714 attr->dw_attr_val.v.val_float.length = length;
3715 attr->dw_attr_val.v.val_float.array = array;
3716 add_dwarf_attr (die, attr);
3719 /* Add a string attribute value to a DIE. */
3722 add_AT_string (die, attr_kind, str)
3723 register dw_die_ref die;
3724 register enum dwarf_attribute attr_kind;
3727 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3729 attr->dw_attr_next = NULL;
3730 attr->dw_attr = attr_kind;
3731 attr->dw_attr_val.val_class = dw_val_class_str;
3732 attr->dw_attr_val.v.val_str = xstrdup (str);
3733 add_dwarf_attr (die, attr);
3736 /* Add a DIE reference attribute value to a DIE. */
3739 add_AT_die_ref (die, attr_kind, targ_die)
3740 register dw_die_ref die;
3741 register enum dwarf_attribute attr_kind;
3742 register dw_die_ref targ_die;
3744 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3746 attr->dw_attr_next = NULL;
3747 attr->dw_attr = attr_kind;
3748 attr->dw_attr_val.val_class = dw_val_class_die_ref;
3749 attr->dw_attr_val.v.val_die_ref = targ_die;
3750 add_dwarf_attr (die, attr);
3753 /* Add an FDE reference attribute value to a DIE. */
3756 add_AT_fde_ref (die, attr_kind, targ_fde)
3757 register dw_die_ref die;
3758 register enum dwarf_attribute attr_kind;
3759 register unsigned targ_fde;
3761 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3763 attr->dw_attr_next = NULL;
3764 attr->dw_attr = attr_kind;
3765 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
3766 attr->dw_attr_val.v.val_fde_index = targ_fde;
3767 add_dwarf_attr (die, attr);
3770 /* Add a location description attribute value to a DIE. */
3773 add_AT_loc (die, attr_kind, loc)
3774 register dw_die_ref die;
3775 register enum dwarf_attribute attr_kind;
3776 register dw_loc_descr_ref loc;
3778 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3780 attr->dw_attr_next = NULL;
3781 attr->dw_attr = attr_kind;
3782 attr->dw_attr_val.val_class = dw_val_class_loc;
3783 attr->dw_attr_val.v.val_loc = loc;
3784 add_dwarf_attr (die, attr);
3787 /* Add an address constant attribute value to a DIE. */
3790 add_AT_addr (die, attr_kind, addr)
3791 register dw_die_ref die;
3792 register enum dwarf_attribute attr_kind;
3795 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3797 attr->dw_attr_next = NULL;
3798 attr->dw_attr = attr_kind;
3799 attr->dw_attr_val.val_class = dw_val_class_addr;
3800 attr->dw_attr_val.v.val_addr = addr;
3801 add_dwarf_attr (die, attr);
3804 /* Add a label identifier attribute value to a DIE. */
3807 add_AT_lbl_id (die, attr_kind, lbl_id)
3808 register dw_die_ref die;
3809 register enum dwarf_attribute attr_kind;
3810 register char *lbl_id;
3812 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3814 attr->dw_attr_next = NULL;
3815 attr->dw_attr = attr_kind;
3816 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3817 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3818 add_dwarf_attr (die, attr);
3821 /* Add a section offset attribute value to a DIE. */
3824 add_AT_section_offset (die, attr_kind, section)
3825 register dw_die_ref die;
3826 register enum dwarf_attribute attr_kind;
3827 register char *section;
3829 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3831 attr->dw_attr_next = NULL;
3832 attr->dw_attr = attr_kind;
3833 attr->dw_attr_val.val_class = dw_val_class_section_offset;
3834 attr->dw_attr_val.v.val_section = section;
3835 add_dwarf_attr (die, attr);
3839 /* Test if die refers to an external subroutine. */
3842 is_extern_subr_die (die)
3843 register dw_die_ref die;
3845 register dw_attr_ref a;
3846 register int is_subr = FALSE;
3847 register int is_extern = FALSE;
3849 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3852 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3854 if (a->dw_attr == DW_AT_external
3855 && a->dw_attr_val.val_class == dw_val_class_flag
3856 && a->dw_attr_val.v.val_flag != 0)
3864 return is_subr && is_extern;
3867 /* Get the attribute of type attr_kind. */
3869 static inline dw_attr_ref
3870 get_AT (die, attr_kind)
3871 register dw_die_ref die;
3872 register enum dwarf_attribute attr_kind;
3874 register dw_attr_ref a;
3875 register dw_die_ref spec = NULL;
3879 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3881 if (a->dw_attr == attr_kind)
3884 if (a->dw_attr == DW_AT_specification
3885 || a->dw_attr == DW_AT_abstract_origin)
3886 spec = a->dw_attr_val.v.val_die_ref;
3890 return get_AT (spec, attr_kind);
3896 /* Return the "low pc" attribute value, typically associated with
3897 a subprogram DIE. Return null if the "low pc" attribute is
3898 either not prsent, or if it cannot be represented as an
3899 assembler label identifier. */
3901 static inline char *
3903 register dw_die_ref die;
3905 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3907 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3908 return a->dw_attr_val.v.val_lbl_id;
3913 /* Return the "high pc" attribute value, typically associated with
3914 a subprogram DIE. Return null if the "high pc" attribute is
3915 either not prsent, or if it cannot be represented as an
3916 assembler label identifier. */
3918 static inline char *
3920 register dw_die_ref die;
3922 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
3924 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3925 return a->dw_attr_val.v.val_lbl_id;
3930 /* Return the value of the string attribute designated by ATTR_KIND, or
3931 NULL if it is not present. */
3933 static inline char *
3934 get_AT_string (die, attr_kind)
3935 register dw_die_ref die;
3936 register enum dwarf_attribute attr_kind;
3938 register dw_attr_ref a = get_AT (die, attr_kind);
3940 if (a && a->dw_attr_val.val_class == dw_val_class_str)
3941 return a->dw_attr_val.v.val_str;
3946 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3947 if it is not present. */
3950 get_AT_flag (die, attr_kind)
3951 register dw_die_ref die;
3952 register enum dwarf_attribute attr_kind;
3954 register dw_attr_ref a = get_AT (die, attr_kind);
3956 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
3957 return a->dw_attr_val.v.val_flag;
3962 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3963 if it is not present. */
3965 static inline unsigned
3966 get_AT_unsigned (die, attr_kind)
3967 register dw_die_ref die;
3968 register enum dwarf_attribute attr_kind;
3970 register dw_attr_ref a = get_AT (die, attr_kind);
3972 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
3973 return a->dw_attr_val.v.val_unsigned;
3981 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3983 return (lang == DW_LANG_C || lang == DW_LANG_C89
3984 || lang == DW_LANG_C_plus_plus);
3990 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3992 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
3995 /* Remove the specified attribute if present. */
3998 remove_AT (die, attr_kind)
3999 register dw_die_ref die;
4000 register enum dwarf_attribute attr_kind;
4002 register dw_attr_ref a;
4003 register dw_attr_ref removed = NULL;;
4007 if (die->die_attr->dw_attr == attr_kind)
4009 removed = die->die_attr;
4010 if (die->die_attr_last == die->die_attr)
4011 die->die_attr_last = NULL;
4013 die->die_attr = die->die_attr->dw_attr_next;
4017 for (a = die->die_attr; a->dw_attr_next != NULL;
4018 a = a->dw_attr_next)
4019 if (a->dw_attr_next->dw_attr == attr_kind)
4021 removed = a->dw_attr_next;
4022 if (die->die_attr_last == a->dw_attr_next)
4023 die->die_attr_last = a;
4025 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4034 /* Discard the children of this DIE. */
4037 remove_children (die)
4038 register dw_die_ref die;
4040 register dw_die_ref child_die = die->die_child;
4042 die->die_child = NULL;
4043 die->die_child_last = NULL;
4045 while (child_die != NULL)
4047 register dw_die_ref tmp_die = child_die;
4048 register dw_attr_ref a;
4050 child_die = child_die->die_sib;
4052 for (a = tmp_die->die_attr; a != NULL; )
4054 register dw_attr_ref tmp_a = a;
4056 a = a->dw_attr_next;
4064 /* Add a child DIE below its parent. */
4067 add_child_die (die, child_die)
4068 register dw_die_ref die;
4069 register dw_die_ref child_die;
4071 if (die != NULL && child_die != NULL)
4073 if (die == child_die)
4075 child_die->die_parent = die;
4076 child_die->die_sib = NULL;
4078 if (die->die_child == NULL)
4080 die->die_child = child_die;
4081 die->die_child_last = child_die;
4085 die->die_child_last->die_sib = child_die;
4086 die->die_child_last = child_die;
4091 /* Return a pointer to a newly created DIE node. */
4093 static inline dw_die_ref
4094 new_die (tag_value, parent_die)
4095 register enum dwarf_tag tag_value;
4096 register dw_die_ref parent_die;
4098 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4100 die->die_tag = tag_value;
4101 die->die_abbrev = 0;
4102 die->die_offset = 0;
4103 die->die_child = NULL;
4104 die->die_parent = NULL;
4105 die->die_sib = NULL;
4106 die->die_child_last = NULL;
4107 die->die_attr = NULL;
4108 die->die_attr_last = NULL;
4110 if (parent_die != NULL)
4111 add_child_die (parent_die, die);
4114 limbo_die_node *limbo_node;
4116 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4117 limbo_node->die = die;
4118 limbo_node->next = limbo_die_list;
4119 limbo_die_list = limbo_node;
4125 /* Return the DIE associated with the given type specifier. */
4127 static inline dw_die_ref
4128 lookup_type_die (type)
4131 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4134 /* Equate a DIE to a given type specifier. */
4137 equate_type_number_to_die (type, type_die)
4139 register dw_die_ref type_die;
4141 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4144 /* Return the DIE associated with a given declaration. */
4146 static inline dw_die_ref
4147 lookup_decl_die (decl)
4150 register unsigned decl_id = DECL_UID (decl);
4152 return (decl_id < decl_die_table_in_use
4153 ? decl_die_table[decl_id] : NULL);
4156 /* Equate a DIE to a particular declaration. */
4159 equate_decl_number_to_die (decl, decl_die)
4161 register dw_die_ref decl_die;
4163 register unsigned decl_id = DECL_UID (decl);
4164 register unsigned num_allocated;
4166 if (decl_id >= decl_die_table_allocated)
4169 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4170 / DECL_DIE_TABLE_INCREMENT)
4171 * DECL_DIE_TABLE_INCREMENT;
4174 = (dw_die_ref *) xrealloc (decl_die_table,
4175 sizeof (dw_die_ref) * num_allocated);
4177 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4178 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4179 decl_die_table_allocated = num_allocated;
4182 if (decl_id >= decl_die_table_in_use)
4183 decl_die_table_in_use = (decl_id + 1);
4185 decl_die_table[decl_id] = decl_die;
4188 /* Return a pointer to a newly allocated location description. Location
4189 descriptions are simple expression terms that can be strung
4190 together to form more complicated location (address) descriptions. */
4192 static inline dw_loc_descr_ref
4193 new_loc_descr (op, oprnd1, oprnd2)
4194 register enum dwarf_location_atom op;
4195 register unsigned long oprnd1;
4196 register unsigned long oprnd2;
4198 register dw_loc_descr_ref descr
4199 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4201 descr->dw_loc_next = NULL;
4202 descr->dw_loc_opc = op;
4203 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4204 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4205 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4206 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4211 /* Add a location description term to a location description expression. */
4214 add_loc_descr (list_head, descr)
4215 register dw_loc_descr_ref *list_head;
4216 register dw_loc_descr_ref descr;
4218 register dw_loc_descr_ref *d;
4220 /* Find the end of the chain. */
4221 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4227 /* Keep track of the number of spaces used to indent the
4228 output of the debugging routines that print the structure of
4229 the DIE internal representation. */
4230 static int print_indent;
4232 /* Indent the line the number of spaces given by print_indent. */
4235 print_spaces (outfile)
4238 fprintf (outfile, "%*s", print_indent, "");
4241 /* Print the information associated with a given DIE, and its children.
4242 This routine is a debugging aid only. */
4245 print_die (die, outfile)
4249 register dw_attr_ref a;
4250 register dw_die_ref c;
4252 print_spaces (outfile);
4253 fprintf (outfile, "DIE %4lu: %s\n",
4254 die->die_offset, dwarf_tag_name (die->die_tag));
4255 print_spaces (outfile);
4256 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4257 fprintf (outfile, " offset: %lu\n", die->die_offset);
4259 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4261 print_spaces (outfile);
4262 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4264 switch (a->dw_attr_val.val_class)
4266 case dw_val_class_addr:
4267 fprintf (outfile, "address");
4269 case dw_val_class_loc:
4270 fprintf (outfile, "location descriptor");
4272 case dw_val_class_const:
4273 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4275 case dw_val_class_unsigned_const:
4276 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4278 case dw_val_class_long_long:
4279 fprintf (outfile, "constant (%lu,%lu)",
4280 a->dw_attr_val.v.val_long_long.hi,
4281 a->dw_attr_val.v.val_long_long.low);
4283 case dw_val_class_float:
4284 fprintf (outfile, "floating-point constant");
4286 case dw_val_class_flag:
4287 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4289 case dw_val_class_die_ref:
4290 if (a->dw_attr_val.v.val_die_ref != NULL)
4291 fprintf (outfile, "die -> %lu",
4292 a->dw_attr_val.v.val_die_ref->die_offset);
4294 fprintf (outfile, "die -> <null>");
4296 case dw_val_class_lbl_id:
4297 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4299 case dw_val_class_section_offset:
4300 fprintf (outfile, "section: %s", a->dw_attr_val.v.val_section);
4302 case dw_val_class_str:
4303 if (a->dw_attr_val.v.val_str != NULL)
4304 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4306 fprintf (outfile, "<null>");
4312 fprintf (outfile, "\n");
4315 if (die->die_child != NULL)
4318 for (c = die->die_child; c != NULL; c = c->die_sib)
4319 print_die (c, outfile);
4325 /* Print the contents of the source code line number correspondence table.
4326 This routine is a debugging aid only. */
4329 print_dwarf_line_table (outfile)
4332 register unsigned i;
4333 register dw_line_info_ref line_info;
4335 fprintf (outfile, "\n\nDWARF source line information\n");
4336 for (i = 1; i < line_info_table_in_use; ++i)
4338 line_info = &line_info_table[i];
4339 fprintf (outfile, "%5d: ", i);
4340 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4341 fprintf (outfile, "%6ld", line_info->dw_line_num);
4342 fprintf (outfile, "\n");
4345 fprintf (outfile, "\n\n");
4348 /* Print the information collected for a given DIE. */
4351 debug_dwarf_die (die)
4354 print_die (die, stderr);
4357 /* Print all DWARF information collected for the compilation unit.
4358 This routine is a debugging aid only. */
4364 print_die (comp_unit_die, stderr);
4365 print_dwarf_line_table (stderr);
4368 /* Traverse the DIE, and add a sibling attribute if it may have the
4369 effect of speeding up access to siblings. To save some space,
4370 avoid generating sibling attributes for DIE's without children. */
4373 add_sibling_attributes(die)
4374 register dw_die_ref die;
4376 register dw_die_ref c;
4377 register dw_attr_ref attr;
4378 if (die != comp_unit_die && die->die_child != NULL)
4380 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4381 attr->dw_attr_next = NULL;
4382 attr->dw_attr = DW_AT_sibling;
4383 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4384 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4386 /* Add the sibling link to the front of the attribute list. */
4387 attr->dw_attr_next = die->die_attr;
4388 if (die->die_attr == NULL)
4389 die->die_attr_last = attr;
4391 die->die_attr = attr;
4394 for (c = die->die_child; c != NULL; c = c->die_sib)
4395 add_sibling_attributes (c);
4398 /* The format of each DIE (and its attribute value pairs)
4399 is encoded in an abbreviation table. This routine builds the
4400 abbreviation table and assigns a unique abbreviation id for
4401 each abbreviation entry. The children of each die are visited
4405 build_abbrev_table (die)
4406 register dw_die_ref die;
4408 register unsigned long abbrev_id;
4409 register unsigned long n_alloc;
4410 register dw_die_ref c;
4411 register dw_attr_ref d_attr, a_attr;
4412 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4414 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4416 if (abbrev->die_tag == die->die_tag)
4418 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4420 a_attr = abbrev->die_attr;
4421 d_attr = die->die_attr;
4423 while (a_attr != NULL && d_attr != NULL)
4425 if ((a_attr->dw_attr != d_attr->dw_attr)
4426 || (value_format (&a_attr->dw_attr_val)
4427 != value_format (&d_attr->dw_attr_val)))
4430 a_attr = a_attr->dw_attr_next;
4431 d_attr = d_attr->dw_attr_next;
4434 if (a_attr == NULL && d_attr == NULL)
4440 if (abbrev_id >= abbrev_die_table_in_use)
4442 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4444 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4446 = (dw_die_ref *) xrealloc (abbrev_die_table,
4447 sizeof (dw_die_ref) * n_alloc);
4449 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4450 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4451 abbrev_die_table_allocated = n_alloc;
4454 ++abbrev_die_table_in_use;
4455 abbrev_die_table[abbrev_id] = die;
4458 die->die_abbrev = abbrev_id;
4459 for (c = die->die_child; c != NULL; c = c->die_sib)
4460 build_abbrev_table (c);
4463 /* Return the size of a string, including the null byte.
4465 This used to treat backslashes as escapes, and hence they were not included
4466 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
4467 which treats a backslash as a backslash, escaping it if necessary, and hence
4468 we must include them in the count. */
4470 static unsigned long
4471 size_of_string (str)
4474 return strlen (str) + 1;
4477 /* Return the size of a location descriptor. */
4479 static unsigned long
4480 size_of_loc_descr (loc)
4481 register dw_loc_descr_ref loc;
4483 register unsigned long size = 1;
4485 switch (loc->dw_loc_opc)
4507 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4510 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4515 case DW_OP_plus_uconst:
4516 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4554 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4557 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4560 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4563 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4564 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4567 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4569 case DW_OP_deref_size:
4570 case DW_OP_xderef_size:
4580 /* Return the size of a series of location descriptors. */
4582 static unsigned long
4584 register dw_loc_descr_ref loc;
4586 register unsigned long size = 0;
4588 for (; loc != NULL; loc = loc->dw_loc_next)
4589 size += size_of_loc_descr (loc);
4594 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4597 constant_size (value)
4598 long unsigned value;
4605 log = floor_log2 (value);
4608 log = 1 << (floor_log2 (log) + 1);
4613 /* Return the size of a DIE, as it is represented in the
4614 .debug_info section. */
4616 static unsigned long
4618 register dw_die_ref die;
4620 register unsigned long size = 0;
4621 register dw_attr_ref a;
4623 size += size_of_uleb128 (die->die_abbrev);
4624 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4626 switch (a->dw_attr_val.val_class)
4628 case dw_val_class_addr:
4631 case dw_val_class_loc:
4633 register unsigned long lsize
4634 = size_of_locs (a->dw_attr_val.v.val_loc);
4637 size += constant_size (lsize);
4641 case dw_val_class_const:
4644 case dw_val_class_unsigned_const:
4645 size += constant_size (a->dw_attr_val.v.val_unsigned);
4647 case dw_val_class_long_long:
4648 size += 1 + 8; /* block */
4650 case dw_val_class_float:
4651 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4653 case dw_val_class_flag:
4656 case dw_val_class_die_ref:
4657 size += DWARF_OFFSET_SIZE;
4659 case dw_val_class_fde_ref:
4660 size += DWARF_OFFSET_SIZE;
4662 case dw_val_class_lbl_id:
4665 case dw_val_class_section_offset:
4666 size += DWARF_OFFSET_SIZE;
4668 case dw_val_class_str:
4669 size += size_of_string (a->dw_attr_val.v.val_str);
4679 /* Size the debugging information associated with a given DIE.
4680 Visits the DIE's children recursively. Updates the global
4681 variable next_die_offset, on each time through. Uses the
4682 current value of next_die_offset to update the die_offset
4683 field in each DIE. */
4686 calc_die_sizes (die)
4689 register dw_die_ref c;
4690 die->die_offset = next_die_offset;
4691 next_die_offset += size_of_die (die);
4693 for (c = die->die_child; c != NULL; c = c->die_sib)
4696 if (die->die_child != NULL)
4697 /* Count the null byte used to terminate sibling lists. */
4698 next_die_offset += 1;
4701 /* Return the size of the line information prolog generated for the
4702 compilation unit. */
4704 static unsigned long
4705 size_of_line_prolog ()
4707 register unsigned long size;
4708 register unsigned long ft_index;
4710 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4712 /* Count the size of the table giving number of args for each
4714 size += DWARF_LINE_OPCODE_BASE - 1;
4716 /* Include directory table is empty (at present). Count only the
4717 null byte used to terminate the table. */
4720 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4722 /* File name entry. */
4723 size += size_of_string (file_table[ft_index]);
4725 /* Include directory index. */
4726 size += size_of_uleb128 (0);
4728 /* Modification time. */
4729 size += size_of_uleb128 (0);
4731 /* File length in bytes. */
4732 size += size_of_uleb128 (0);
4735 /* Count the file table terminator. */
4740 /* Return the size of the line information generated for this
4741 compilation unit. */
4743 static unsigned long
4744 size_of_line_info ()
4746 register unsigned long size;
4747 register unsigned long lt_index;
4748 register unsigned long current_line;
4749 register long line_offset;
4750 register long line_delta;
4751 register unsigned long current_file;
4752 register unsigned long function;
4753 unsigned long size_of_set_address;
4755 /* Size of a DW_LNE_set_address instruction. */
4756 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4758 /* Version number. */
4761 /* Prolog length specifier. */
4762 size += DWARF_OFFSET_SIZE;
4765 size += size_of_line_prolog ();
4767 /* Set address register instruction. */
4768 size += size_of_set_address;
4772 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4774 register dw_line_info_ref line_info;
4776 /* Advance pc instruction. */
4777 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4781 size += size_of_set_address;
4783 line_info = &line_info_table[lt_index];
4784 if (line_info->dw_file_num != current_file)
4786 /* Set file number instruction. */
4788 current_file = line_info->dw_file_num;
4789 size += size_of_uleb128 (current_file);
4792 if (line_info->dw_line_num != current_line)
4794 line_offset = line_info->dw_line_num - current_line;
4795 line_delta = line_offset - DWARF_LINE_BASE;
4796 current_line = line_info->dw_line_num;
4797 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4798 /* 1-byte special line number instruction. */
4802 /* Advance line instruction. */
4804 size += size_of_sleb128 (line_offset);
4805 /* Generate line entry instruction. */
4811 /* Advance pc instruction. */
4815 size += size_of_set_address;
4817 /* End of line number info. marker. */
4818 size += 1 + size_of_uleb128 (1) + 1;
4823 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4825 register dw_separate_line_info_ref line_info
4826 = &separate_line_info_table[lt_index];
4827 if (function != line_info->function)
4829 function = line_info->function;
4830 /* Set address register instruction. */
4831 size += size_of_set_address;
4835 /* Advance pc instruction. */
4839 size += size_of_set_address;
4842 if (line_info->dw_file_num != current_file)
4844 /* Set file number instruction. */
4846 current_file = line_info->dw_file_num;
4847 size += size_of_uleb128 (current_file);
4850 if (line_info->dw_line_num != current_line)
4852 line_offset = line_info->dw_line_num - current_line;
4853 line_delta = line_offset - DWARF_LINE_BASE;
4854 current_line = line_info->dw_line_num;
4855 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4856 /* 1-byte special line number instruction. */
4860 /* Advance line instruction. */
4862 size += size_of_sleb128 (line_offset);
4864 /* Generate line entry instruction. */
4871 /* If we're done with a function, end its sequence. */
4872 if (lt_index == separate_line_info_table_in_use
4873 || separate_line_info_table[lt_index].function != function)
4878 /* Advance pc instruction. */
4882 size += size_of_set_address;
4884 /* End of line number info. marker. */
4885 size += 1 + size_of_uleb128 (1) + 1;
4892 /* Return the size of the .debug_pubnames table generated for the
4893 compilation unit. */
4895 static unsigned long
4898 register unsigned long size;
4899 register unsigned i;
4901 size = DWARF_PUBNAMES_HEADER_SIZE;
4902 for (i = 0; i < pubname_table_in_use; ++i)
4904 register pubname_ref p = &pubname_table[i];
4905 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4908 size += DWARF_OFFSET_SIZE;
4912 /* Return the size of the information in the .debug_aranges section. */
4914 static unsigned long
4917 register unsigned long size;
4919 size = DWARF_ARANGES_HEADER_SIZE;
4921 /* Count the address/length pair for this compilation unit. */
4922 size += 2 * PTR_SIZE;
4923 size += 2 * PTR_SIZE * arange_table_in_use;
4925 /* Count the two zero words used to terminated the address range table. */
4926 size += 2 * PTR_SIZE;
4930 /* Select the encoding of an attribute value. */
4932 static enum dwarf_form
4936 switch (v->val_class)
4938 case dw_val_class_addr:
4939 return DW_FORM_addr;
4940 case dw_val_class_loc:
4941 switch (constant_size (size_of_locs (v->v.val_loc)))
4944 return DW_FORM_block1;
4946 return DW_FORM_block2;
4950 case dw_val_class_const:
4951 return DW_FORM_data4;
4952 case dw_val_class_unsigned_const:
4953 switch (constant_size (v->v.val_unsigned))
4956 return DW_FORM_data1;
4958 return DW_FORM_data2;
4960 return DW_FORM_data4;
4962 return DW_FORM_data8;
4966 case dw_val_class_long_long:
4967 return DW_FORM_block1;
4968 case dw_val_class_float:
4969 return DW_FORM_block1;
4970 case dw_val_class_flag:
4971 return DW_FORM_flag;
4972 case dw_val_class_die_ref:
4974 case dw_val_class_fde_ref:
4975 return DW_FORM_data;
4976 case dw_val_class_lbl_id:
4977 return DW_FORM_addr;
4978 case dw_val_class_section_offset:
4979 return DW_FORM_data;
4980 case dw_val_class_str:
4981 return DW_FORM_string;
4987 /* Output the encoding of an attribute value. */
4990 output_value_format (v)
4993 enum dwarf_form form = value_format (v);
4995 output_uleb128 (form);
4997 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
4999 fputc ('\n', asm_out_file);
5002 /* Output the .debug_abbrev section which defines the DIE abbreviation
5006 output_abbrev_section ()
5008 unsigned long abbrev_id;
5011 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5013 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5015 output_uleb128 (abbrev_id);
5017 fprintf (asm_out_file, " (abbrev code)");
5019 fputc ('\n', asm_out_file);
5020 output_uleb128 (abbrev->die_tag);
5022 fprintf (asm_out_file, " (TAG: %s)",
5023 dwarf_tag_name (abbrev->die_tag));
5025 fputc ('\n', asm_out_file);
5026 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5027 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5030 fprintf (asm_out_file, "\t%s %s",
5032 (abbrev->die_child != NULL
5033 ? "DW_children_yes" : "DW_children_no"));
5035 fputc ('\n', asm_out_file);
5037 for (a_attr = abbrev->die_attr; a_attr != NULL;
5038 a_attr = a_attr->dw_attr_next)
5040 output_uleb128 (a_attr->dw_attr);
5042 fprintf (asm_out_file, " (%s)",
5043 dwarf_attr_name (a_attr->dw_attr));
5045 fputc ('\n', asm_out_file);
5046 output_value_format (&a_attr->dw_attr_val);
5049 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5053 /* Output location description stack opcode's operands (if any). */
5056 output_loc_operands (loc)
5057 register dw_loc_descr_ref loc;
5059 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5060 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5062 switch (loc->dw_loc_opc)
5065 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5066 fputc ('\n', asm_out_file);
5070 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5071 fputc ('\n', asm_out_file);
5075 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5076 fputc ('\n', asm_out_file);
5080 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5081 fputc ('\n', asm_out_file);
5086 fputc ('\n', asm_out_file);
5089 output_uleb128 (val1->v.val_unsigned);
5090 fputc ('\n', asm_out_file);
5093 output_sleb128 (val1->v.val_int);
5094 fputc ('\n', asm_out_file);
5097 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5098 fputc ('\n', asm_out_file);
5100 case DW_OP_plus_uconst:
5101 output_uleb128 (val1->v.val_unsigned);
5102 fputc ('\n', asm_out_file);
5106 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5107 fputc ('\n', asm_out_file);
5141 output_sleb128 (val1->v.val_int);
5142 fputc ('\n', asm_out_file);
5145 output_uleb128 (val1->v.val_unsigned);
5146 fputc ('\n', asm_out_file);
5149 output_sleb128 (val1->v.val_int);
5150 fputc ('\n', asm_out_file);
5153 output_uleb128 (val1->v.val_unsigned);
5154 fputc ('\n', asm_out_file);
5155 output_sleb128 (val2->v.val_int);
5156 fputc ('\n', asm_out_file);
5159 output_uleb128 (val1->v.val_unsigned);
5160 fputc ('\n', asm_out_file);
5162 case DW_OP_deref_size:
5163 case DW_OP_xderef_size:
5164 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5165 fputc ('\n', asm_out_file);
5172 /* Compute the offset of a sibling. */
5174 static unsigned long
5175 sibling_offset (die)
5178 unsigned long offset;
5180 if (die->die_child_last == NULL)
5181 offset = die->die_offset + size_of_die (die);
5183 offset = sibling_offset (die->die_child_last) + 1;
5188 /* Output the DIE and its attributes. Called recursively to generate
5189 the definitions of each child DIE. */
5193 register dw_die_ref die;
5195 register dw_attr_ref a;
5196 register dw_die_ref c;
5197 register unsigned long ref_offset;
5198 register unsigned long size;
5199 register dw_loc_descr_ref loc;
5202 output_uleb128 (die->die_abbrev);
5204 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5205 die->die_offset, dwarf_tag_name (die->die_tag));
5207 fputc ('\n', asm_out_file);
5209 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5211 switch (a->dw_attr_val.val_class)
5213 case dw_val_class_addr:
5214 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5215 a->dw_attr_val.v.val_addr);
5218 case dw_val_class_loc:
5219 size = size_of_locs (a->dw_attr_val.v.val_loc);
5221 /* Output the block length for this list of location operations. */
5222 switch (constant_size (size))
5225 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5228 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5235 fprintf (asm_out_file, "\t%s %s",
5236 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5238 fputc ('\n', asm_out_file);
5239 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5240 loc = loc->dw_loc_next)
5242 /* Output the opcode. */
5243 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5245 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5246 dwarf_stack_op_name (loc->dw_loc_opc));
5248 fputc ('\n', asm_out_file);
5250 /* Output the operand(s) (if any). */
5251 output_loc_operands (loc);
5255 case dw_val_class_const:
5256 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5259 case dw_val_class_unsigned_const:
5260 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5263 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5264 a->dw_attr_val.v.val_unsigned);
5267 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5268 a->dw_attr_val.v.val_unsigned);
5271 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5272 a->dw_attr_val.v.val_unsigned);
5275 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5276 a->dw_attr_val.v.val_long_long.hi,
5277 a->dw_attr_val.v.val_long_long.low);
5284 case dw_val_class_long_long:
5285 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5287 fprintf (asm_out_file, "\t%s %s",
5288 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5290 fputc ('\n', asm_out_file);
5291 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5292 a->dw_attr_val.v.val_long_long.hi,
5293 a->dw_attr_val.v.val_long_long.low);
5296 fprintf (asm_out_file,
5297 "\t%s long long constant", ASM_COMMENT_START);
5299 fputc ('\n', asm_out_file);
5302 case dw_val_class_float:
5303 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5304 a->dw_attr_val.v.val_float.length * 4);
5306 fprintf (asm_out_file, "\t%s %s",
5307 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5309 fputc ('\n', asm_out_file);
5310 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5312 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5313 a->dw_attr_val.v.val_float.array[i]);
5315 fprintf (asm_out_file, "\t%s fp constant word %d",
5316 ASM_COMMENT_START, i);
5318 fputc ('\n', asm_out_file);
5322 case dw_val_class_flag:
5323 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5326 case dw_val_class_die_ref:
5327 if (a->dw_attr_val.v.val_die_ref != NULL)
5328 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5329 else if (a->dw_attr == DW_AT_sibling)
5330 ref_offset = sibling_offset(die);
5334 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5337 case dw_val_class_fde_ref:
5340 ASM_GENERATE_INTERNAL_LABEL
5341 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5342 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5343 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5347 case dw_val_class_lbl_id:
5348 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5351 case dw_val_class_section_offset:
5352 ASM_OUTPUT_DWARF_OFFSET (asm_out_file,
5354 (a->dw_attr_val.v.val_section));
5357 case dw_val_class_str:
5359 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5361 ASM_OUTPUT_ASCII (asm_out_file,
5362 a->dw_attr_val.v.val_str,
5363 strlen (a->dw_attr_val.v.val_str) + 1);
5370 if (a->dw_attr_val.val_class != dw_val_class_loc
5371 && a->dw_attr_val.val_class != dw_val_class_long_long
5372 && a->dw_attr_val.val_class != dw_val_class_float)
5375 fprintf (asm_out_file, "\t%s %s",
5376 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5378 fputc ('\n', asm_out_file);
5382 for (c = die->die_child; c != NULL; c = c->die_sib)
5385 if (die->die_child != NULL)
5387 /* Add null byte to terminate sibling list. */
5388 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5390 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5391 ASM_COMMENT_START, die->die_offset);
5393 fputc ('\n', asm_out_file);
5397 /* Output the compilation unit that appears at the beginning of the
5398 .debug_info section, and precedes the DIE descriptions. */
5401 output_compilation_unit_header ()
5403 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5405 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5408 fputc ('\n', asm_out_file);
5409 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5411 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5413 fputc ('\n', asm_out_file);
5414 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (ABBREV_SECTION));
5416 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5419 fputc ('\n', asm_out_file);
5420 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5422 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5424 fputc ('\n', asm_out_file);
5427 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5428 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5429 argument list, and maybe the scope. */
5432 dwarf2_name (decl, scope)
5436 return (*decl_printable_name) (decl, scope ? 1 : 0);
5439 /* Add a new entry to .debug_pubnames if appropriate. */
5442 add_pubname (decl, die)
5448 if (! TREE_PUBLIC (decl))
5451 if (pubname_table_in_use == pubname_table_allocated)
5453 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5454 pubname_table = (pubname_ref) xrealloc
5455 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5458 p = &pubname_table[pubname_table_in_use++];
5461 p->name = xstrdup (dwarf2_name (decl, 1));
5464 /* Output the public names table used to speed up access to externally
5465 visible names. For now, only generate entries for externally
5466 visible procedures. */
5471 register unsigned i;
5472 register unsigned long pubnames_length = size_of_pubnames ();
5474 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5477 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5480 fputc ('\n', asm_out_file);
5481 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5484 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5486 fputc ('\n', asm_out_file);
5487 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5489 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5492 fputc ('\n', asm_out_file);
5493 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5495 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5497 fputc ('\n', asm_out_file);
5498 for (i = 0; i < pubname_table_in_use; ++i)
5500 register pubname_ref pub = &pubname_table[i];
5502 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5504 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5506 fputc ('\n', asm_out_file);
5510 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5511 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5515 ASM_OUTPUT_ASCII (asm_out_file, pub->name, strlen (pub->name) + 1);
5518 fputc ('\n', asm_out_file);
5521 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5522 fputc ('\n', asm_out_file);
5525 /* Add a new entry to .debug_aranges if appropriate. */
5528 add_arange (decl, die)
5532 if (! DECL_SECTION_NAME (decl))
5535 if (arange_table_in_use == arange_table_allocated)
5537 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5539 = (arange_ref) xrealloc (arange_table,
5540 arange_table_allocated * sizeof (dw_die_ref));
5543 arange_table[arange_table_in_use++] = die;
5546 /* Output the information that goes into the .debug_aranges table.
5547 Namely, define the beginning and ending address range of the
5548 text section generated for this compilation unit. */
5553 register unsigned i;
5554 register unsigned long aranges_length = size_of_aranges ();
5556 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5558 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5561 fputc ('\n', asm_out_file);
5562 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5564 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5566 fputc ('\n', asm_out_file);
5567 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5569 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5572 fputc ('\n', asm_out_file);
5573 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5575 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5577 fputc ('\n', asm_out_file);
5578 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5580 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5583 fputc ('\n', asm_out_file);
5584 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
5586 fprintf (asm_out_file, ",0,0");
5589 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5590 ASM_COMMENT_START, 2 * PTR_SIZE);
5592 fputc ('\n', asm_out_file);
5593 ASM_OUTPUT_DWARF_ADDR (asm_out_file, stripattributes (TEXT_SECTION));
5595 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5597 fputc ('\n', asm_out_file);
5598 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5599 stripattributes (TEXT_SECTION));
5601 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5603 fputc ('\n', asm_out_file);
5604 for (i = 0; i < arange_table_in_use; ++i)
5606 dw_die_ref a = arange_table[i];
5608 if (a->die_tag == DW_TAG_subprogram)
5609 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
5612 char *name = get_AT_string (a, DW_AT_MIPS_linkage_name);
5614 name = get_AT_string (a, DW_AT_name);
5616 ASM_OUTPUT_DWARF_ADDR (asm_out_file, name);
5620 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5622 fputc ('\n', asm_out_file);
5623 if (a->die_tag == DW_TAG_subprogram)
5624 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
5627 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5628 get_AT_unsigned (a, DW_AT_byte_size));
5631 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5633 fputc ('\n', asm_out_file);
5636 /* Output the terminator words. */
5637 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5638 fputc ('\n', asm_out_file);
5639 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5640 fputc ('\n', asm_out_file);
5643 /* Output the source line number correspondence information. This
5644 information goes into the .debug_line section.
5646 If the format of this data changes, then the function size_of_line_info
5647 must also be adjusted the same way. */
5652 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5653 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5654 register unsigned opc;
5655 register unsigned n_op_args;
5656 register unsigned long ft_index;
5657 register unsigned long lt_index;
5658 register unsigned long current_line;
5659 register long line_offset;
5660 register long line_delta;
5661 register unsigned long current_file;
5662 register unsigned long function;
5664 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5666 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5669 fputc ('\n', asm_out_file);
5670 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5672 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5674 fputc ('\n', asm_out_file);
5675 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5677 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5679 fputc ('\n', asm_out_file);
5680 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5682 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5685 fputc ('\n', asm_out_file);
5686 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5688 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5691 fputc ('\n', asm_out_file);
5692 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5694 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5697 fputc ('\n', asm_out_file);
5698 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5700 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5703 fputc ('\n', asm_out_file);
5704 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5706 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5708 fputc ('\n', asm_out_file);
5709 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5713 case DW_LNS_advance_pc:
5714 case DW_LNS_advance_line:
5715 case DW_LNS_set_file:
5716 case DW_LNS_set_column:
5717 case DW_LNS_fixed_advance_pc:
5724 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5726 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5727 ASM_COMMENT_START, opc, n_op_args);
5728 fputc ('\n', asm_out_file);
5732 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5734 /* Include directory table is empty, at present */
5735 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5736 fputc ('\n', asm_out_file);
5738 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5740 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5744 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5745 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5746 ASM_COMMENT_START, ft_index);
5750 ASM_OUTPUT_ASCII (asm_out_file,
5751 file_table[ft_index],
5752 strlen (file_table[ft_index]) + 1);
5755 fputc ('\n', asm_out_file);
5757 /* Include directory index */
5759 fputc ('\n', asm_out_file);
5761 /* Modification time */
5763 fputc ('\n', asm_out_file);
5765 /* File length in bytes */
5767 fputc ('\n', asm_out_file);
5770 /* Terminate the file name table */
5771 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5772 fputc ('\n', asm_out_file);
5774 /* Set the address register to the first location in the text section */
5775 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5777 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5779 fputc ('\n', asm_out_file);
5780 output_uleb128 (1 + PTR_SIZE);
5781 fputc ('\n', asm_out_file);
5782 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5783 fputc ('\n', asm_out_file);
5784 ASM_OUTPUT_DWARF_ADDR (asm_out_file, stripattributes (TEXT_SECTION));
5785 fputc ('\n', asm_out_file);
5787 /* Generate the line number to PC correspondence table, encoded as
5788 a series of state machine operations. */
5791 strcpy (prev_line_label, stripattributes (TEXT_SECTION));
5792 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5794 register dw_line_info_ref line_info;
5796 /* Emit debug info for the address of the current line, choosing
5797 the encoding that uses the least amount of space. */
5798 /* ??? Unfortunately, we have little choice here currently, and must
5799 always use the most general form. Gcc does not know the address
5800 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5801 dwarf2 aware assemblers at this time, so we can't use any special
5802 pseudo ops that would allow the assembler to optimally encode this for
5803 us. Many ports do have length attributes which will give an upper
5804 bound on the address range. We could perhaps use length attributes
5805 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5806 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5809 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5810 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5812 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5815 fputc ('\n', asm_out_file);
5816 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5817 fputc ('\n', asm_out_file);
5821 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5822 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5824 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5826 fputc ('\n', asm_out_file);
5827 output_uleb128 (1 + PTR_SIZE);
5828 fputc ('\n', asm_out_file);
5829 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5830 fputc ('\n', asm_out_file);
5831 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5832 fputc ('\n', asm_out_file);
5834 strcpy (prev_line_label, line_label);
5836 /* Emit debug info for the source file of the current line, if
5837 different from the previous line. */
5838 line_info = &line_info_table[lt_index];
5839 if (line_info->dw_file_num != current_file)
5841 current_file = line_info->dw_file_num;
5842 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5844 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5846 fputc ('\n', asm_out_file);
5847 output_uleb128 (current_file);
5849 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5851 fputc ('\n', asm_out_file);
5854 /* Emit debug info for the current line number, choosing the encoding
5855 that uses the least amount of space. */
5856 line_offset = line_info->dw_line_num - current_line;
5857 line_delta = line_offset - DWARF_LINE_BASE;
5858 current_line = line_info->dw_line_num;
5859 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5861 /* This can handle deltas from -10 to 234, using the current
5862 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5864 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5865 DWARF_LINE_OPCODE_BASE + line_delta);
5867 fprintf (asm_out_file,
5868 "\t%s line %ld", ASM_COMMENT_START, current_line);
5870 fputc ('\n', asm_out_file);
5874 /* This can handle any delta. This takes at least 4 bytes, depending
5875 on the value being encoded. */
5876 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5878 fprintf (asm_out_file, "\t%s advance to line %ld",
5879 ASM_COMMENT_START, current_line);
5881 fputc ('\n', asm_out_file);
5882 output_sleb128 (line_offset);
5883 fputc ('\n', asm_out_file);
5884 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5885 fputc ('\n', asm_out_file);
5889 /* Emit debug info for the address of the end of the function. */
5892 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5894 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5897 fputc ('\n', asm_out_file);
5898 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
5899 fputc ('\n', asm_out_file);
5903 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5905 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5906 fputc ('\n', asm_out_file);
5907 output_uleb128 (1 + PTR_SIZE);
5908 fputc ('\n', asm_out_file);
5909 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5910 fputc ('\n', asm_out_file);
5911 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
5912 fputc ('\n', asm_out_file);
5915 /* Output the marker for the end of the line number info. */
5916 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5918 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
5920 fputc ('\n', asm_out_file);
5922 fputc ('\n', asm_out_file);
5923 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
5924 fputc ('\n', asm_out_file);
5929 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
5931 register dw_separate_line_info_ref line_info
5932 = &separate_line_info_table[lt_index];
5934 /* Emit debug info for the address of the current line. If this is
5935 a new function, or the first line of a function, then we need
5936 to handle it differently. */
5937 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
5939 if (function != line_info->function)
5941 function = line_info->function;
5943 /* Set the address register to the first line in the function */
5944 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5946 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5949 fputc ('\n', asm_out_file);
5950 output_uleb128 (1 + PTR_SIZE);
5951 fputc ('\n', asm_out_file);
5952 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5953 fputc ('\n', asm_out_file);
5954 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5955 fputc ('\n', asm_out_file);
5959 /* ??? See the DW_LNS_advance_pc comment above. */
5962 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5964 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5967 fputc ('\n', asm_out_file);
5968 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
5970 fputc ('\n', asm_out_file);
5974 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5976 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5978 fputc ('\n', asm_out_file);
5979 output_uleb128 (1 + PTR_SIZE);
5980 fputc ('\n', asm_out_file);
5981 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5982 fputc ('\n', asm_out_file);
5983 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5984 fputc ('\n', asm_out_file);
5987 strcpy (prev_line_label, line_label);
5989 /* Emit debug info for the source file of the current line, if
5990 different from the previous line. */
5991 if (line_info->dw_file_num != current_file)
5993 current_file = line_info->dw_file_num;
5994 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5996 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5998 fputc ('\n', asm_out_file);
5999 output_uleb128 (current_file);
6001 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
6003 fputc ('\n', asm_out_file);
6006 /* Emit debug info for the current line number, choosing the encoding
6007 that uses the least amount of space. */
6008 if (line_info->dw_line_num != current_line)
6010 line_offset = line_info->dw_line_num - current_line;
6011 line_delta = line_offset - DWARF_LINE_BASE;
6012 current_line = line_info->dw_line_num;
6013 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6015 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6016 DWARF_LINE_OPCODE_BASE + line_delta);
6018 fprintf (asm_out_file,
6019 "\t%s line %ld", ASM_COMMENT_START, current_line);
6021 fputc ('\n', asm_out_file);
6025 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6027 fprintf (asm_out_file, "\t%s advance to line %ld",
6028 ASM_COMMENT_START, current_line);
6030 fputc ('\n', asm_out_file);
6031 output_sleb128 (line_offset);
6032 fputc ('\n', asm_out_file);
6033 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6034 fputc ('\n', asm_out_file);
6040 /* If we're done with a function, end its sequence. */
6041 if (lt_index == separate_line_info_table_in_use
6042 || separate_line_info_table[lt_index].function != function)
6047 /* Emit debug info for the address of the end of the function. */
6048 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6051 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6053 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6056 fputc ('\n', asm_out_file);
6057 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6059 fputc ('\n', asm_out_file);
6063 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6065 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6067 fputc ('\n', asm_out_file);
6068 output_uleb128 (1 + PTR_SIZE);
6069 fputc ('\n', asm_out_file);
6070 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6071 fputc ('\n', asm_out_file);
6072 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6073 fputc ('\n', asm_out_file);
6076 /* Output the marker for the end of this sequence. */
6077 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6079 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6082 fputc ('\n', asm_out_file);
6084 fputc ('\n', asm_out_file);
6085 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6086 fputc ('\n', asm_out_file);
6091 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6092 in question represents the outermost pair of curly braces (i.e. the "body
6093 block") of a function or method.
6095 For any BLOCK node representing a "body block" of a function or method, the
6096 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6097 represents the outermost (function) scope for the function or method (i.e.
6098 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6099 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6102 is_body_block (stmt)
6105 if (TREE_CODE (stmt) == BLOCK)
6107 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6109 if (TREE_CODE (parent) == BLOCK)
6111 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6113 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6121 /* Given a pointer to a tree node for some base type, return a pointer to
6122 a DIE that describes the given type.
6124 This routine must only be called for GCC type nodes that correspond to
6125 Dwarf base (fundamental) types. */
6128 base_type_die (type)
6131 register dw_die_ref base_type_result;
6132 register char *type_name;
6133 register enum dwarf_type encoding;
6134 register tree name = TYPE_NAME (type);
6136 if (TREE_CODE (type) == ERROR_MARK
6137 || TREE_CODE (type) == VOID_TYPE)
6140 if (TREE_CODE (name) == TYPE_DECL)
6141 name = DECL_NAME (name);
6142 type_name = IDENTIFIER_POINTER (name);
6144 switch (TREE_CODE (type))
6147 /* Carefully distinguish the C character types, without messing
6148 up if the language is not C. Note that we check only for the names
6149 that contain spaces; other names might occur by coincidence in other
6151 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6152 && (type == char_type_node
6153 || ! strcmp (type_name, "signed char")
6154 || ! strcmp (type_name, "unsigned char"))))
6156 if (TREE_UNSIGNED (type))
6157 encoding = DW_ATE_unsigned;
6159 encoding = DW_ATE_signed;
6162 /* else fall through */
6165 /* GNU Pascal/Ada CHAR type. Not used in C. */
6166 if (TREE_UNSIGNED (type))
6167 encoding = DW_ATE_unsigned_char;
6169 encoding = DW_ATE_signed_char;
6173 encoding = DW_ATE_float;
6177 encoding = DW_ATE_complex_float;
6181 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6182 encoding = DW_ATE_boolean;
6186 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6189 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6190 add_AT_string (base_type_result, DW_AT_name, type_name);
6191 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6192 int_size_in_bytes (type));
6193 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6195 return base_type_result;
6198 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6199 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6200 a given type is generally the same as the given type, except that if the
6201 given type is a pointer or reference type, then the root type of the given
6202 type is the root type of the "basis" type for the pointer or reference
6203 type. (This definition of the "root" type is recursive.) Also, the root
6204 type of a `const' qualified type or a `volatile' qualified type is the
6205 root type of the given type without the qualifiers. */
6211 if (TREE_CODE (type) == ERROR_MARK)
6212 return error_mark_node;
6214 switch (TREE_CODE (type))
6217 return error_mark_node;
6220 case REFERENCE_TYPE:
6221 return type_main_variant (root_type (TREE_TYPE (type)));
6224 return type_main_variant (type);
6228 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6229 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6235 switch (TREE_CODE (type))
6250 case QUAL_UNION_TYPE:
6255 case REFERENCE_TYPE:
6268 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6269 entry that chains various modifiers in front of the given type. */
6272 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6274 register int is_const_type;
6275 register int is_volatile_type;
6276 register dw_die_ref context_die;
6278 register enum tree_code code = TREE_CODE (type);
6279 register dw_die_ref mod_type_die = NULL;
6280 register dw_die_ref sub_die = NULL;
6281 register tree item_type = NULL;
6283 if (code != ERROR_MARK)
6285 type = build_type_variant (type, is_const_type, is_volatile_type);
6287 mod_type_die = lookup_type_die (type);
6289 return mod_type_die;
6291 /* Handle C typedef types. */
6292 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6293 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6295 tree dtype = TREE_TYPE (TYPE_NAME (type));
6298 /* For a named type, use the typedef. */
6299 gen_type_die (type, context_die);
6300 mod_type_die = lookup_type_die (type);
6303 else if (is_const_type < TYPE_READONLY (dtype)
6304 || is_volatile_type < TYPE_VOLATILE (dtype))
6305 /* cv-unqualified version of named type. Just use the unnamed
6306 type to which it refers. */
6308 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6309 is_const_type, is_volatile_type,
6311 /* Else cv-qualified version of named type; fall through. */
6316 else if (is_const_type)
6318 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6319 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6321 else if (is_volatile_type)
6323 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6324 sub_die = modified_type_die (type, 0, 0, context_die);
6326 else if (code == POINTER_TYPE)
6328 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6329 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6331 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6333 item_type = TREE_TYPE (type);
6335 else if (code == REFERENCE_TYPE)
6337 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6338 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6340 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6342 item_type = TREE_TYPE (type);
6344 else if (is_base_type (type))
6345 mod_type_die = base_type_die (type);
6348 gen_type_die (type, context_die);
6350 /* We have to get the type_main_variant here (and pass that to the
6351 `lookup_type_die' routine) because the ..._TYPE node we have
6352 might simply be a *copy* of some original type node (where the
6353 copy was created to help us keep track of typedef names) and
6354 that copy might have a different TYPE_UID from the original
6356 mod_type_die = lookup_type_die (type_main_variant (type));
6357 if (mod_type_die == NULL)
6362 equate_type_number_to_die (type, mod_type_die);
6364 /* We must do this after the equate_type_number_to_die call, in case
6365 this is a recursive type. This ensures that the modified_type_die
6366 recursion will terminate even if the type is recursive. Recursive
6367 types are possible in Ada. */
6368 sub_die = modified_type_die (item_type,
6369 TYPE_READONLY (item_type),
6370 TYPE_VOLATILE (item_type),
6373 if (sub_die != NULL)
6374 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6376 return mod_type_die;
6379 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6380 an enumerated type. */
6386 return TREE_CODE (type) == ENUMERAL_TYPE;
6389 /* Return a location descriptor that designates a machine register. */
6391 static dw_loc_descr_ref
6392 reg_loc_descriptor (rtl)
6395 register dw_loc_descr_ref loc_result = NULL;
6396 register unsigned reg = reg_number (rtl);
6399 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6401 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6406 /* Return a location descriptor that designates a base+offset location. */
6408 static dw_loc_descr_ref
6409 based_loc_descr (reg, offset)
6413 register dw_loc_descr_ref loc_result;
6414 /* For the "frame base", we use the frame pointer or stack pointer
6415 registers, since the RTL for local variables is relative to one of
6417 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6418 ? HARD_FRAME_POINTER_REGNUM
6419 : STACK_POINTER_REGNUM);
6422 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6424 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6426 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6431 /* Return true if this RTL expression describes a base+offset calculation. */
6437 return (GET_CODE (rtl) == PLUS
6438 && ((GET_CODE (XEXP (rtl, 0)) == REG
6439 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6442 /* The following routine converts the RTL for a variable or parameter
6443 (resident in memory) into an equivalent Dwarf representation of a
6444 mechanism for getting the address of that same variable onto the top of a
6445 hypothetical "address evaluation" stack.
6447 When creating memory location descriptors, we are effectively transforming
6448 the RTL for a memory-resident object into its Dwarf postfix expression
6449 equivalent. This routine recursively descends an RTL tree, turning
6450 it into Dwarf postfix code as it goes. */
6452 static dw_loc_descr_ref
6453 mem_loc_descriptor (rtl)
6456 dw_loc_descr_ref mem_loc_result = NULL;
6457 /* Note that for a dynamically sized array, the location we will generate a
6458 description of here will be the lowest numbered location which is
6459 actually within the array. That's *not* necessarily the same as the
6460 zeroth element of the array. */
6462 switch (GET_CODE (rtl))
6465 /* The case of a subreg may arise when we have a local (register)
6466 variable or a formal (register) parameter which doesn't quite fill
6467 up an entire register. For now, just assume that it is
6468 legitimate to make the Dwarf info refer to the whole register which
6469 contains the given subreg. */
6470 rtl = XEXP (rtl, 0);
6472 /* ... fall through ... */
6475 /* Whenever a register number forms a part of the description of the
6476 method for calculating the (dynamic) address of a memory resident
6477 object, DWARF rules require the register number be referred to as
6478 a "base register". This distinction is not based in any way upon
6479 what category of register the hardware believes the given register
6480 belongs to. This is strictly DWARF terminology we're dealing with
6481 here. Note that in cases where the location of a memory-resident
6482 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6483 OP_CONST (0)) the actual DWARF location descriptor that we generate
6484 may just be OP_BASEREG (basereg). This may look deceptively like
6485 the object in question was allocated to a register (rather than in
6486 memory) so DWARF consumers need to be aware of the subtle
6487 distinction between OP_REG and OP_BASEREG. */
6488 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6492 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6493 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6498 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6499 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6500 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6504 if (is_based_loc (rtl))
6505 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6506 INTVAL (XEXP (rtl, 1)));
6509 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6510 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6511 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6516 /* If a pseudo-reg is optimized away, it is possible for it to
6517 be replaced with a MEM containing a multiply. */
6518 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6519 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6520 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6524 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6531 return mem_loc_result;
6534 /* Return a descriptor that describes the concatenation of two locations.
6535 This is typically a complex variable. */
6537 static dw_loc_descr_ref
6538 concat_loc_descriptor (x0, x1)
6539 register rtx x0, x1;
6541 dw_loc_descr_ref cc_loc_result = NULL;
6543 if (!is_pseudo_reg (x0)
6544 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6545 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6546 add_loc_descr (&cc_loc_result,
6547 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6549 if (!is_pseudo_reg (x1)
6550 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6551 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6552 add_loc_descr (&cc_loc_result,
6553 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6555 return cc_loc_result;
6558 /* Output a proper Dwarf location descriptor for a variable or parameter
6559 which is either allocated in a register or in a memory location. For a
6560 register, we just generate an OP_REG and the register number. For a
6561 memory location we provide a Dwarf postfix expression describing how to
6562 generate the (dynamic) address of the object onto the address stack. */
6564 static dw_loc_descr_ref
6565 loc_descriptor (rtl)
6568 dw_loc_descr_ref loc_result = NULL;
6569 switch (GET_CODE (rtl))
6572 /* The case of a subreg may arise when we have a local (register)
6573 variable or a formal (register) parameter which doesn't quite fill
6574 up an entire register. For now, just assume that it is
6575 legitimate to make the Dwarf info refer to the whole register which
6576 contains the given subreg. */
6577 rtl = XEXP (rtl, 0);
6579 /* ... fall through ... */
6582 loc_result = reg_loc_descriptor (rtl);
6586 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6590 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6600 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6601 which is not less than the value itself. */
6603 static inline unsigned
6604 ceiling (value, boundary)
6605 register unsigned value;
6606 register unsigned boundary;
6608 return (((value + boundary - 1) / boundary) * boundary);
6611 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6612 pointer to the declared type for the relevant field variable, or return
6613 `integer_type_node' if the given node turns out to be an
6622 if (TREE_CODE (decl) == ERROR_MARK)
6623 return integer_type_node;
6625 type = DECL_BIT_FIELD_TYPE (decl);
6626 if (type == NULL_TREE)
6627 type = TREE_TYPE (decl);
6632 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6633 node, return the alignment in bits for the type, or else return
6634 BITS_PER_WORD if the node actually turns out to be an
6637 static inline unsigned
6638 simple_type_align_in_bits (type)
6641 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6644 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6645 node, return the size in bits for the type if it is a constant, or else
6646 return the alignment for the type if the type's size is not constant, or
6647 else return BITS_PER_WORD if the type actually turns out to be an
6650 static inline unsigned
6651 simple_type_size_in_bits (type)
6654 if (TREE_CODE (type) == ERROR_MARK)
6655 return BITS_PER_WORD;
6658 register tree type_size_tree = TYPE_SIZE (type);
6660 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6661 return TYPE_ALIGN (type);
6663 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6667 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6668 return the byte offset of the lowest addressed byte of the "containing
6669 object" for the given FIELD_DECL, or return 0 if we are unable to
6670 determine what that offset is, either because the argument turns out to
6671 be a pointer to an ERROR_MARK node, or because the offset is actually
6672 variable. (We can't handle the latter case just yet). */
6675 field_byte_offset (decl)
6678 register unsigned type_align_in_bytes;
6679 register unsigned type_align_in_bits;
6680 register unsigned type_size_in_bits;
6681 register unsigned object_offset_in_align_units;
6682 register unsigned object_offset_in_bits;
6683 register unsigned object_offset_in_bytes;
6685 register tree bitpos_tree;
6686 register tree field_size_tree;
6687 register unsigned bitpos_int;
6688 register unsigned deepest_bitpos;
6689 register unsigned field_size_in_bits;
6691 if (TREE_CODE (decl) == ERROR_MARK)
6694 if (TREE_CODE (decl) != FIELD_DECL)
6697 type = field_type (decl);
6699 bitpos_tree = DECL_FIELD_BITPOS (decl);
6700 field_size_tree = DECL_SIZE (decl);
6702 /* We cannot yet cope with fields whose positions or sizes are variable, so
6703 for now, when we see such things, we simply return 0. Someday, we may
6704 be able to handle such cases, but it will be damn difficult. */
6705 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6707 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6709 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6712 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6713 type_size_in_bits = simple_type_size_in_bits (type);
6714 type_align_in_bits = simple_type_align_in_bits (type);
6715 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6717 /* Note that the GCC front-end doesn't make any attempt to keep track of
6718 the starting bit offset (relative to the start of the containing
6719 structure type) of the hypothetical "containing object" for a bit-
6720 field. Thus, when computing the byte offset value for the start of the
6721 "containing object" of a bit-field, we must deduce this information on
6722 our own. This can be rather tricky to do in some cases. For example,
6723 handling the following structure type definition when compiling for an
6724 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6727 struct S { int field1; long long field2:31; };
6729 Fortunately, there is a simple rule-of-thumb which can be
6730 used in such cases. When compiling for an i386/i486, GCC will allocate
6731 8 bytes for the structure shown above. It decides to do this based upon
6732 one simple rule for bit-field allocation. Quite simply, GCC allocates
6733 each "containing object" for each bit-field at the first (i.e. lowest
6734 addressed) legitimate alignment boundary (based upon the required
6735 minimum alignment for the declared type of the field) which it can
6736 possibly use, subject to the condition that there is still enough
6737 available space remaining in the containing object (when allocated at
6738 the selected point) to fully accommodate all of the bits of the
6739 bit-field itself. This simple rule makes it obvious why GCC allocates
6740 8 bytes for each object of the structure type shown above. When looking
6741 for a place to allocate the "containing object" for `field2', the
6742 compiler simply tries to allocate a 64-bit "containing object" at each
6743 successive 32-bit boundary (starting at zero) until it finds a place to
6744 allocate that 64- bit field such that at least 31 contiguous (and
6745 previously unallocated) bits remain within that selected 64 bit field.
6746 (As it turns out, for the example above, the compiler finds that it is
6747 OK to allocate the "containing object" 64-bit field at bit-offset zero
6748 within the structure type.) Here we attempt to work backwards from the
6749 limited set of facts we're given, and we try to deduce from those facts,
6750 where GCC must have believed that the containing object started (within
6751 the structure type). The value we deduce is then used (by the callers of
6752 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6753 for fields (both bit-fields and, in the case of DW_AT_location, regular
6756 /* Figure out the bit-distance from the start of the structure to the
6757 "deepest" bit of the bit-field. */
6758 deepest_bitpos = bitpos_int + field_size_in_bits;
6760 /* This is the tricky part. Use some fancy footwork to deduce where the
6761 lowest addressed bit of the containing object must be. */
6762 object_offset_in_bits
6763 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6765 /* Compute the offset of the containing object in "alignment units". */
6766 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6768 /* Compute the offset of the containing object in bytes. */
6769 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6771 return object_offset_in_bytes;
6774 /* The following routines define various Dwarf attributes and any data
6775 associated with them. */
6777 /* Add a location description attribute value to a DIE.
6779 This emits location attributes suitable for whole variables and
6780 whole parameters. Note that the location attributes for struct fields are
6781 generated by the routine `data_member_location_attribute' below. */
6784 add_AT_location_description (die, attr_kind, rtl)
6786 enum dwarf_attribute attr_kind;
6789 /* Handle a special case. If we are about to output a location descriptor
6790 for a variable or parameter which has been optimized out of existence,
6791 don't do that. A variable which has been optimized out
6792 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6793 Currently, in some rare cases, variables can have DECL_RTL values which
6794 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6795 elsewhere in the compiler. We treat such cases as if the variable(s) in
6796 question had been optimized out of existence. */
6798 if (is_pseudo_reg (rtl)
6799 || (GET_CODE (rtl) == MEM
6800 && is_pseudo_reg (XEXP (rtl, 0)))
6801 || (GET_CODE (rtl) == CONCAT
6802 && is_pseudo_reg (XEXP (rtl, 0))
6803 && is_pseudo_reg (XEXP (rtl, 1))))
6806 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6809 /* Attach the specialized form of location attribute used for data
6810 members of struct and union types. In the special case of a
6811 FIELD_DECL node which represents a bit-field, the "offset" part
6812 of this special location descriptor must indicate the distance
6813 in bytes from the lowest-addressed byte of the containing struct
6814 or union type to the lowest-addressed byte of the "containing
6815 object" for the bit-field. (See the `field_byte_offset' function
6816 above).. For any given bit-field, the "containing object" is a
6817 hypothetical object (of some integral or enum type) within which
6818 the given bit-field lives. The type of this hypothetical
6819 "containing object" is always the same as the declared type of
6820 the individual bit-field itself (for GCC anyway... the DWARF
6821 spec doesn't actually mandate this). Note that it is the size
6822 (in bytes) of the hypothetical "containing object" which will
6823 be given in the DW_AT_byte_size attribute for this bit-field.
6824 (See the `byte_size_attribute' function below.) It is also used
6825 when calculating the value of the DW_AT_bit_offset attribute.
6826 (See the `bit_offset_attribute' function below). */
6829 add_data_member_location_attribute (die, decl)
6830 register dw_die_ref die;
6833 register unsigned long offset;
6834 register dw_loc_descr_ref loc_descr;
6835 register enum dwarf_location_atom op;
6837 if (TREE_CODE (decl) == TREE_VEC)
6838 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6840 offset = field_byte_offset (decl);
6842 /* The DWARF2 standard says that we should assume that the structure address
6843 is already on the stack, so we can specify a structure field address
6844 by using DW_OP_plus_uconst. */
6846 #ifdef MIPS_DEBUGGING_INFO
6847 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6848 correctly. It works only if we leave the offset on the stack. */
6851 op = DW_OP_plus_uconst;
6854 loc_descr = new_loc_descr (op, offset, 0);
6855 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
6858 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6859 does not have a "location" either in memory or in a register. These
6860 things can arise in GNU C when a constant is passed as an actual parameter
6861 to an inlined function. They can also arise in C++ where declared
6862 constants do not necessarily get memory "homes". */
6865 add_const_value_attribute (die, rtl)
6866 register dw_die_ref die;
6869 switch (GET_CODE (rtl))
6872 /* Note that a CONST_INT rtx could represent either an integer or a
6873 floating-point constant. A CONST_INT is used whenever the constant
6874 will fit into a single word. In all such cases, the original mode
6875 of the constant value is wiped out, and the CONST_INT rtx is
6876 assigned VOIDmode. */
6877 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
6881 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6882 floating-point constant. A CONST_DOUBLE is used whenever the
6883 constant requires more than one word in order to be adequately
6884 represented. We output CONST_DOUBLEs as blocks. */
6886 register enum machine_mode mode = GET_MODE (rtl);
6888 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
6890 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
6894 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
6898 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
6902 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
6907 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
6914 add_AT_float (die, DW_AT_const_value, length, array);
6917 add_AT_long_long (die, DW_AT_const_value,
6918 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
6923 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
6929 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
6933 /* In cases where an inlined instance of an inline function is passed
6934 the address of an `auto' variable (which is local to the caller) we
6935 can get a situation where the DECL_RTL of the artificial local
6936 variable (for the inlining) which acts as a stand-in for the
6937 corresponding formal parameter (of the inline function) will look
6938 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6939 exactly a compile-time constant expression, but it isn't the address
6940 of the (artificial) local variable either. Rather, it represents the
6941 *value* which the artificial local variable always has during its
6942 lifetime. We currently have no way to represent such quasi-constant
6943 values in Dwarf, so for now we just punt and generate nothing. */
6947 /* No other kinds of rtx should be possible here. */
6953 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6954 data attribute for a variable or a parameter. We generate the
6955 DW_AT_const_value attribute only in those cases where the given variable
6956 or parameter does not have a true "location" either in memory or in a
6957 register. This can happen (for example) when a constant is passed as an
6958 actual argument in a call to an inline function. (It's possible that
6959 these things can crop up in other ways also.) Note that one type of
6960 constant value which can be passed into an inlined function is a constant
6961 pointer. This can happen for example if an actual argument in an inlined
6962 function call evaluates to a compile-time constant address. */
6965 add_location_or_const_value_attribute (die, decl)
6966 register dw_die_ref die;
6970 register tree declared_type;
6971 register tree passed_type;
6973 if (TREE_CODE (decl) == ERROR_MARK)
6976 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
6979 /* Here we have to decide where we are going to say the parameter "lives"
6980 (as far as the debugger is concerned). We only have a couple of
6981 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6983 DECL_RTL normally indicates where the parameter lives during most of the
6984 activation of the function. If optimization is enabled however, this
6985 could be either NULL or else a pseudo-reg. Both of those cases indicate
6986 that the parameter doesn't really live anywhere (as far as the code
6987 generation parts of GCC are concerned) during most of the function's
6988 activation. That will happen (for example) if the parameter is never
6989 referenced within the function.
6991 We could just generate a location descriptor here for all non-NULL
6992 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6993 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6994 where DECL_RTL is NULL or is a pseudo-reg.
6996 Note however that we can only get away with using DECL_INCOMING_RTL as
6997 a backup substitute for DECL_RTL in certain limited cases. In cases
6998 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
6999 we can be sure that the parameter was passed using the same type as it is
7000 declared to have within the function, and that its DECL_INCOMING_RTL
7001 points us to a place where a value of that type is passed.
7003 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7004 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7005 because in these cases DECL_INCOMING_RTL points us to a value of some
7006 type which is *different* from the type of the parameter itself. Thus,
7007 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7008 such cases, the debugger would end up (for example) trying to fetch a
7009 `float' from a place which actually contains the first part of a
7010 `double'. That would lead to really incorrect and confusing
7011 output at debug-time.
7013 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7014 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7015 are a couple of exceptions however. On little-endian machines we can
7016 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7017 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7018 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7019 when (on a little-endian machine) a non-prototyped function has a
7020 parameter declared to be of type `short' or `char'. In such cases,
7021 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7022 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7023 passed `int' value. If the debugger then uses that address to fetch
7024 a `short' or a `char' (on a little-endian machine) the result will be
7025 the correct data, so we allow for such exceptional cases below.
7027 Note that our goal here is to describe the place where the given formal
7028 parameter lives during most of the function's activation (i.e. between
7029 the end of the prologue and the start of the epilogue). We'll do that
7030 as best as we can. Note however that if the given formal parameter is
7031 modified sometime during the execution of the function, then a stack
7032 backtrace (at debug-time) will show the function as having been
7033 called with the *new* value rather than the value which was
7034 originally passed in. This happens rarely enough that it is not
7035 a major problem, but it *is* a problem, and I'd like to fix it.
7037 A future version of dwarf2out.c may generate two additional
7038 attributes for any given DW_TAG_formal_parameter DIE which will
7039 describe the "passed type" and the "passed location" for the
7040 given formal parameter in addition to the attributes we now
7041 generate to indicate the "declared type" and the "active
7042 location" for each parameter. This additional set of attributes
7043 could be used by debuggers for stack backtraces. Separately, note
7044 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7045 NULL also. This happens (for example) for inlined-instances of
7046 inline function formal parameters which are never referenced.
7047 This really shouldn't be happening. All PARM_DECL nodes should
7048 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7049 doesn't currently generate these values for inlined instances of
7050 inline function parameters, so when we see such cases, we are
7051 just out-of-luck for the time being (until integrate.c
7054 /* Use DECL_RTL as the "location" unless we find something better. */
7055 rtl = DECL_RTL (decl);
7057 if (TREE_CODE (decl) == PARM_DECL)
7059 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7061 declared_type = type_main_variant (TREE_TYPE (decl));
7062 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7064 /* This decl represents a formal parameter which was optimized out.
7065 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7066 all* cases where (rtl == NULL_RTX) just below. */
7067 if (declared_type == passed_type)
7068 rtl = DECL_INCOMING_RTL (decl);
7069 else if (! BYTES_BIG_ENDIAN
7070 && TREE_CODE (declared_type) == INTEGER_TYPE
7071 && TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
7072 rtl = DECL_INCOMING_RTL (decl);
7076 if (rtl == NULL_RTX)
7079 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7080 #ifdef LEAF_REG_REMAP
7082 leaf_renumber_regs_insn (rtl);
7085 switch (GET_CODE (rtl))
7088 /* The address of a variable that was optimized away; don't emit
7099 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7100 add_const_value_attribute (die, rtl);
7107 add_AT_location_description (die, DW_AT_location, rtl);
7115 /* Generate an DW_AT_name attribute given some string value to be included as
7116 the value of the attribute. */
7119 add_name_attribute (die, name_string)
7120 register dw_die_ref die;
7121 register char *name_string;
7123 if (name_string != NULL && *name_string != 0)
7124 add_AT_string (die, DW_AT_name, name_string);
7127 /* Given a tree node describing an array bound (either lower or upper) output
7128 a representation for that bound. */
7131 add_bound_info (subrange_die, bound_attr, bound)
7132 register dw_die_ref subrange_die;
7133 register enum dwarf_attribute bound_attr;
7134 register tree bound;
7136 register unsigned bound_value = 0;
7138 /* If this is an Ada unconstrained array type, then don't emit any debug
7139 info because the array bounds are unknown. They are parameterized when
7140 the type is instantiated. */
7141 if (contains_placeholder_p (bound))
7144 switch (TREE_CODE (bound))
7149 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7151 bound_value = TREE_INT_CST_LOW (bound);
7152 if (bound_attr == DW_AT_lower_bound
7153 && ((is_c_family () && bound_value == 0)
7154 || (is_fortran () && bound_value == 1)))
7155 /* use the default */;
7157 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7162 case NON_LVALUE_EXPR:
7163 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7167 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7168 access the upper bound values may be bogus. If they refer to a
7169 register, they may only describe how to get at these values at the
7170 points in the generated code right after they have just been
7171 computed. Worse yet, in the typical case, the upper bound values
7172 will not even *be* computed in the optimized code (though the
7173 number of elements will), so these SAVE_EXPRs are entirely
7174 bogus. In order to compensate for this fact, we check here to see
7175 if optimization is enabled, and if so, we don't add an attribute
7176 for the (unknown and unknowable) upper bound. This should not
7177 cause too much trouble for existing (stupid?) debuggers because
7178 they have to deal with empty upper bounds location descriptions
7179 anyway in order to be able to deal with incomplete array types.
7180 Of course an intelligent debugger (GDB?) should be able to
7181 comprehend that a missing upper bound specification in a array
7182 type used for a storage class `auto' local array variable
7183 indicates that the upper bound is both unknown (at compile- time)
7184 and unknowable (at run-time) due to optimization.
7186 We assume that a MEM rtx is safe because gcc wouldn't put the
7187 value there unless it was going to be used repeatedly in the
7188 function, i.e. for cleanups. */
7189 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7191 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7192 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7193 register rtx loc = SAVE_EXPR_RTL (bound);
7195 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7196 it references an outer function's frame. */
7198 if (GET_CODE (loc) == MEM)
7200 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7202 if (XEXP (loc, 0) != new_addr)
7203 loc = gen_rtx (MEM, GET_MODE (loc), new_addr);
7206 add_AT_flag (decl_die, DW_AT_artificial, 1);
7207 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7208 add_AT_location_description (decl_die, DW_AT_location, loc);
7209 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7212 /* Else leave out the attribute. */
7218 /* ??? These types of bounds can be created by the Ada front end,
7219 and it isn't clear how to emit debug info for them. */
7227 /* Note that the block of subscript information for an array type also
7228 includes information about the element type of type given array type. */
7231 add_subscript_info (type_die, type)
7232 register dw_die_ref type_die;
7235 #ifndef MIPS_DEBUGGING_INFO
7236 register unsigned dimension_number;
7238 register tree lower, upper;
7239 register dw_die_ref subrange_die;
7241 /* The GNU compilers represent multidimensional array types as sequences of
7242 one dimensional array types whose element types are themselves array
7243 types. Here we squish that down, so that each multidimensional array
7244 type gets only one array_type DIE in the Dwarf debugging info. The draft
7245 Dwarf specification say that we are allowed to do this kind of
7246 compression in C (because there is no difference between an array or
7247 arrays and a multidimensional array in C) but for other source languages
7248 (e.g. Ada) we probably shouldn't do this. */
7250 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7251 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7252 We work around this by disabling this feature. See also
7253 gen_array_type_die. */
7254 #ifndef MIPS_DEBUGGING_INFO
7255 for (dimension_number = 0;
7256 TREE_CODE (type) == ARRAY_TYPE;
7257 type = TREE_TYPE (type), dimension_number++)
7260 register tree domain = TYPE_DOMAIN (type);
7262 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7263 and (in GNU C only) variable bounds. Handle all three forms
7265 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7268 /* We have an array type with specified bounds. */
7269 lower = TYPE_MIN_VALUE (domain);
7270 upper = TYPE_MAX_VALUE (domain);
7272 /* define the index type. */
7273 if (TREE_TYPE (domain))
7275 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7276 TREE_TYPE field. We can't emit debug info for this
7277 because it is an unnamed integral type. */
7278 if (TREE_CODE (domain) == INTEGER_TYPE
7279 && TYPE_NAME (domain) == NULL_TREE
7280 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7281 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7284 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7288 /* ??? If upper is NULL, the array has unspecified length,
7289 but it does have a lower bound. This happens with Fortran
7291 Since the debugger is definitely going to need to know N
7292 to produce useful results, go ahead and output the lower
7293 bound solo, and hope the debugger can cope. */
7295 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7297 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7300 /* We have an array type with an unspecified length. The DWARF-2
7301 spec does not say how to handle this; let's just leave out the
7306 #ifndef MIPS_DEBUGGING_INFO
7312 add_byte_size_attribute (die, tree_node)
7314 register tree tree_node;
7316 register unsigned size;
7318 switch (TREE_CODE (tree_node))
7326 case QUAL_UNION_TYPE:
7327 size = int_size_in_bytes (tree_node);
7330 /* For a data member of a struct or union, the DW_AT_byte_size is
7331 generally given as the number of bytes normally allocated for an
7332 object of the *declared* type of the member itself. This is true
7333 even for bit-fields. */
7334 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7340 /* Note that `size' might be -1 when we get to this point. If it is, that
7341 indicates that the byte size of the entity in question is variable. We
7342 have no good way of expressing this fact in Dwarf at the present time,
7343 so just let the -1 pass on through. */
7345 add_AT_unsigned (die, DW_AT_byte_size, size);
7348 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7349 which specifies the distance in bits from the highest order bit of the
7350 "containing object" for the bit-field to the highest order bit of the
7353 For any given bit-field, the "containing object" is a hypothetical
7354 object (of some integral or enum type) within which the given bit-field
7355 lives. The type of this hypothetical "containing object" is always the
7356 same as the declared type of the individual bit-field itself. The
7357 determination of the exact location of the "containing object" for a
7358 bit-field is rather complicated. It's handled by the
7359 `field_byte_offset' function (above).
7361 Note that it is the size (in bytes) of the hypothetical "containing object"
7362 which will be given in the DW_AT_byte_size attribute for this bit-field.
7363 (See `byte_size_attribute' above). */
7366 add_bit_offset_attribute (die, decl)
7367 register dw_die_ref die;
7370 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7371 register tree type = DECL_BIT_FIELD_TYPE (decl);
7372 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7373 register unsigned bitpos_int;
7374 register unsigned highest_order_object_bit_offset;
7375 register unsigned highest_order_field_bit_offset;
7376 register unsigned bit_offset;
7378 /* Must be a field and a bit field. */
7380 || TREE_CODE (decl) != FIELD_DECL)
7383 /* We can't yet handle bit-fields whose offsets are variable, so if we
7384 encounter such things, just return without generating any attribute
7386 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7389 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7391 /* Note that the bit offset is always the distance (in bits) from the
7392 highest-order bit of the "containing object" to the highest-order bit of
7393 the bit-field itself. Since the "high-order end" of any object or field
7394 is different on big-endian and little-endian machines, the computation
7395 below must take account of these differences. */
7396 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7397 highest_order_field_bit_offset = bitpos_int;
7399 if (! BYTES_BIG_ENDIAN)
7401 highest_order_field_bit_offset
7402 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7404 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7408 = (! BYTES_BIG_ENDIAN
7409 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7410 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7412 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7415 /* For a FIELD_DECL node which represents a bit field, output an attribute
7416 which specifies the length in bits of the given field. */
7419 add_bit_size_attribute (die, decl)
7420 register dw_die_ref die;
7423 /* Must be a field and a bit field. */
7424 if (TREE_CODE (decl) != FIELD_DECL
7425 || ! DECL_BIT_FIELD_TYPE (decl))
7427 add_AT_unsigned (die, DW_AT_bit_size,
7428 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7431 /* If the compiled language is ANSI C, then add a 'prototyped'
7432 attribute, if arg types are given for the parameters of a function. */
7435 add_prototyped_attribute (die, func_type)
7436 register dw_die_ref die;
7437 register tree func_type;
7439 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7440 && TYPE_ARG_TYPES (func_type) != NULL)
7441 add_AT_flag (die, DW_AT_prototyped, 1);
7445 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7446 by looking in either the type declaration or object declaration
7450 add_abstract_origin_attribute (die, origin)
7451 register dw_die_ref die;
7452 register tree origin;
7454 dw_die_ref origin_die = NULL;
7455 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7456 origin_die = lookup_decl_die (origin);
7457 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7458 origin_die = lookup_type_die (origin);
7460 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7463 /* We do not currently support the pure_virtual attribute. */
7466 add_pure_or_virtual_attribute (die, func_decl)
7467 register dw_die_ref die;
7468 register tree func_decl;
7470 if (DECL_VINDEX (func_decl))
7472 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7473 add_AT_loc (die, DW_AT_vtable_elem_location,
7474 new_loc_descr (DW_OP_constu,
7475 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7478 /* GNU extension: Record what type this method came from originally. */
7479 if (debug_info_level > DINFO_LEVEL_TERSE)
7480 add_AT_die_ref (die, DW_AT_containing_type,
7481 lookup_type_die (DECL_CONTEXT (func_decl)));
7485 /* Add source coordinate attributes for the given decl. */
7488 add_src_coords_attributes (die, decl)
7489 register dw_die_ref die;
7492 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7494 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7495 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7498 /* Add an DW_AT_name attribute and source coordinate attribute for the
7499 given decl, but only if it actually has a name. */
7502 add_name_and_src_coords_attributes (die, decl)
7503 register dw_die_ref die;
7506 register tree decl_name;
7508 decl_name = DECL_NAME (decl);
7509 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7511 add_name_attribute (die, dwarf2_name (decl, 0));
7512 add_src_coords_attributes (die, decl);
7513 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7514 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7515 add_AT_string (die, DW_AT_MIPS_linkage_name,
7516 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7520 /* Push a new declaration scope. */
7523 push_decl_scope (scope)
7526 tree containing_scope;
7529 /* Make room in the decl_scope_table, if necessary. */
7530 if (decl_scope_table_allocated == decl_scope_depth)
7532 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7534 = (decl_scope_node *) xrealloc (decl_scope_table,
7535 (decl_scope_table_allocated
7536 * sizeof (decl_scope_node)));
7539 decl_scope_table[decl_scope_depth].scope = scope;
7541 /* Sometimes, while recursively emitting subtypes within a class type,
7542 we end up recuring on a subtype at a higher level then the current
7543 subtype. In such a case, we need to search the decl_scope_table to
7544 find the parent of this subtype. */
7546 if (TREE_CODE_CLASS (TREE_CODE (scope)) == 't')
7547 containing_scope = TYPE_CONTEXT (scope);
7549 containing_scope = NULL_TREE;
7551 /* The normal case. */
7552 if (decl_scope_depth == 0
7553 || containing_scope == NULL_TREE
7554 /* Ignore namespaces for the moment. */
7555 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7556 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7557 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7560 /* We need to search for the containing_scope. */
7561 for (i = 0; i < decl_scope_depth; i++)
7562 if (decl_scope_table[i].scope == containing_scope)
7565 if (i == decl_scope_depth)
7568 decl_scope_table[decl_scope_depth].previous = i;
7574 /* Return the DIE for the scope that immediately contains this declaration. */
7577 scope_die_for (t, context_die)
7579 register dw_die_ref context_die;
7581 register dw_die_ref scope_die = NULL;
7582 register tree containing_scope;
7585 /* Walk back up the declaration tree looking for a place to define
7587 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7588 containing_scope = TYPE_CONTEXT (t);
7589 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7590 containing_scope = decl_class_context (t);
7592 containing_scope = DECL_CONTEXT (t);
7594 /* Ignore namespaces for the moment. */
7595 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7596 containing_scope = NULL_TREE;
7598 /* Function-local tags and functions get stuck in limbo until they are
7599 fixed up by decls_for_scope. */
7600 if (context_die == NULL && containing_scope != NULL_TREE
7601 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7604 if (containing_scope == NULL_TREE)
7605 scope_die = comp_unit_die;
7608 for (i = decl_scope_depth - 1, scope_die = context_die;
7609 i >= 0 && decl_scope_table[i].scope != containing_scope;
7610 (scope_die = scope_die->die_parent,
7611 i = decl_scope_table[i].previous))
7614 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7615 does it try to handle types defined by TYPE_DECLs. Such types
7616 thus have an incorrect TYPE_CONTEXT, which points to the block
7617 they were originally defined in, instead of the current block
7618 created by function inlining. We try to detect that here and
7621 if (i < 0 && scope_die == comp_unit_die
7622 && TREE_CODE (containing_scope) == BLOCK
7623 && is_tagged_type (t)
7624 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7625 == containing_scope))
7627 scope_die = context_die;
7628 /* Since the checks below are no longer applicable. */
7634 if (scope_die != comp_unit_die
7635 || TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7637 if (debug_info_level > DINFO_LEVEL_TERSE
7638 && !TREE_ASM_WRITTEN (containing_scope))
7646 /* Pop a declaration scope. */
7650 if (decl_scope_depth <= 0)
7655 /* Many forms of DIEs require a "type description" attribute. This
7656 routine locates the proper "type descriptor" die for the type given
7657 by 'type', and adds an DW_AT_type attribute below the given die. */
7660 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7661 register dw_die_ref object_die;
7663 register int decl_const;
7664 register int decl_volatile;
7665 register dw_die_ref context_die;
7667 register enum tree_code code = TREE_CODE (type);
7668 register dw_die_ref type_die = NULL;
7670 /* ??? If this type is an unnamed subrange type of an integral or
7671 floating-point type, use the inner type. This is because we have no
7672 support for unnamed types in base_type_die. This can happen if this is
7673 an Ada subrange type. Correct solution is emit a subrange type die. */
7674 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7675 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7676 type = TREE_TYPE (type), code = TREE_CODE (type);
7678 if (code == ERROR_MARK)
7681 /* Handle a special case. For functions whose return type is void, we
7682 generate *no* type attribute. (Note that no object may have type
7683 `void', so this only applies to function return types). */
7684 if (code == VOID_TYPE)
7687 type_die = modified_type_die (type,
7688 decl_const || TYPE_READONLY (type),
7689 decl_volatile || TYPE_VOLATILE (type),
7691 if (type_die != NULL)
7692 add_AT_die_ref (object_die, DW_AT_type, type_die);
7695 /* Given a tree pointer to a struct, class, union, or enum type node, return
7696 a pointer to the (string) tag name for the given type, or zero if the type
7697 was declared without a tag. */
7703 register char *name = 0;
7705 if (TYPE_NAME (type) != 0)
7707 register tree t = 0;
7709 /* Find the IDENTIFIER_NODE for the type name. */
7710 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7711 t = TYPE_NAME (type);
7713 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7714 a TYPE_DECL node, regardless of whether or not a `typedef' was
7716 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7717 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7718 t = DECL_NAME (TYPE_NAME (type));
7720 /* Now get the name as a string, or invent one. */
7722 name = IDENTIFIER_POINTER (t);
7725 return (name == 0 || *name == '\0') ? 0 : name;
7728 /* Return the type associated with a data member, make a special check
7729 for bit field types. */
7732 member_declared_type (member)
7733 register tree member;
7735 return (DECL_BIT_FIELD_TYPE (member)
7736 ? DECL_BIT_FIELD_TYPE (member)
7737 : TREE_TYPE (member));
7740 /* Get the decl's label, as described by its RTL. This may be different
7741 from the DECL_NAME name used in the source file. */
7745 decl_start_label (decl)
7750 x = DECL_RTL (decl);
7751 if (GET_CODE (x) != MEM)
7755 if (GET_CODE (x) != SYMBOL_REF)
7758 fnname = XSTR (x, 0);
7763 /* These routines generate the internal representation of the DIE's for
7764 the compilation unit. Debugging information is collected by walking
7765 the declaration trees passed in from dwarf2out_decl(). */
7768 gen_array_type_die (type, context_die)
7770 register dw_die_ref context_die;
7772 register dw_die_ref scope_die = scope_die_for (type, context_die);
7773 register dw_die_ref array_die;
7774 register tree element_type;
7776 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7777 the inner array type comes before the outer array type. Thus we must
7778 call gen_type_die before we call new_die. See below also. */
7779 #ifdef MIPS_DEBUGGING_INFO
7780 gen_type_die (TREE_TYPE (type), context_die);
7783 array_die = new_die (DW_TAG_array_type, scope_die);
7786 /* We default the array ordering. SDB will probably do
7787 the right things even if DW_AT_ordering is not present. It's not even
7788 an issue until we start to get into multidimensional arrays anyway. If
7789 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7790 then we'll have to put the DW_AT_ordering attribute back in. (But if
7791 and when we find out that we need to put these in, we will only do so
7792 for multidimensional arrays. */
7793 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
7796 #ifdef MIPS_DEBUGGING_INFO
7797 /* The SGI compilers handle arrays of unknown bound by setting
7798 AT_declaration and not emitting any subrange DIEs. */
7799 if (! TYPE_DOMAIN (type))
7800 add_AT_unsigned (array_die, DW_AT_declaration, 1);
7803 add_subscript_info (array_die, type);
7805 equate_type_number_to_die (type, array_die);
7807 /* Add representation of the type of the elements of this array type. */
7808 element_type = TREE_TYPE (type);
7810 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7811 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7812 We work around this by disabling this feature. See also
7813 add_subscript_info. */
7814 #ifndef MIPS_DEBUGGING_INFO
7815 while (TREE_CODE (element_type) == ARRAY_TYPE)
7816 element_type = TREE_TYPE (element_type);
7818 gen_type_die (element_type, context_die);
7821 add_type_attribute (array_die, element_type, 0, 0, context_die);
7825 gen_set_type_die (type, context_die)
7827 register dw_die_ref context_die;
7829 register dw_die_ref type_die
7830 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
7832 equate_type_number_to_die (type, type_die);
7833 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
7838 gen_entry_point_die (decl, context_die)
7840 register dw_die_ref context_die;
7842 register tree origin = decl_ultimate_origin (decl);
7843 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
7845 add_abstract_origin_attribute (decl_die, origin);
7848 add_name_and_src_coords_attributes (decl_die, decl);
7849 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
7853 if (DECL_ABSTRACT (decl))
7854 equate_decl_number_to_die (decl, decl_die);
7856 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
7860 /* Remember a type in the pending_types_list. */
7866 if (pending_types == pending_types_allocated)
7868 pending_types_allocated += PENDING_TYPES_INCREMENT;
7870 = (tree *) xrealloc (pending_types_list,
7871 sizeof (tree) * pending_types_allocated);
7874 pending_types_list[pending_types++] = type;
7877 /* Output any pending types (from the pending_types list) which we can output
7878 now (taking into account the scope that we are working on now).
7880 For each type output, remove the given type from the pending_types_list
7881 *before* we try to output it. */
7884 output_pending_types_for_scope (context_die)
7885 register dw_die_ref context_die;
7889 while (pending_types)
7892 type = pending_types_list[pending_types];
7893 gen_type_die (type, context_die);
7894 if (!TREE_ASM_WRITTEN (type))
7899 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7902 gen_inlined_enumeration_type_die (type, context_die)
7904 register dw_die_ref context_die;
7906 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
7907 scope_die_for (type, context_die));
7909 if (!TREE_ASM_WRITTEN (type))
7911 add_abstract_origin_attribute (type_die, type);
7914 /* Generate a DIE to represent an inlined instance of a structure type. */
7917 gen_inlined_structure_type_die (type, context_die)
7919 register dw_die_ref context_die;
7921 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
7922 scope_die_for (type, context_die));
7924 if (!TREE_ASM_WRITTEN (type))
7926 add_abstract_origin_attribute (type_die, type);
7929 /* Generate a DIE to represent an inlined instance of a union type. */
7932 gen_inlined_union_type_die (type, context_die)
7934 register dw_die_ref context_die;
7936 register dw_die_ref type_die = new_die (DW_TAG_union_type,
7937 scope_die_for (type, context_die));
7939 if (!TREE_ASM_WRITTEN (type))
7941 add_abstract_origin_attribute (type_die, type);
7944 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7945 include all of the information about the enumeration values also. Each
7946 enumerated type name/value is listed as a child of the enumerated type
7950 gen_enumeration_type_die (type, context_die)
7952 register dw_die_ref context_die;
7954 register dw_die_ref type_die = lookup_type_die (type);
7956 if (type_die == NULL)
7958 type_die = new_die (DW_TAG_enumeration_type,
7959 scope_die_for (type, context_die));
7960 equate_type_number_to_die (type, type_die);
7961 add_name_attribute (type_die, type_tag (type));
7963 else if (! TYPE_SIZE (type))
7966 remove_AT (type_die, DW_AT_declaration);
7968 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7969 given enum type is incomplete, do not generate the DW_AT_byte_size
7970 attribute or the DW_AT_element_list attribute. */
7971 if (TYPE_SIZE (type))
7975 TREE_ASM_WRITTEN (type) = 1;
7976 add_byte_size_attribute (type_die, type);
7977 if (TYPE_STUB_DECL (type) != NULL_TREE)
7978 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
7980 /* If the first reference to this type was as the return type of an
7981 inline function, then it may not have a parent. Fix this now. */
7982 if (type_die->die_parent == NULL)
7983 add_child_die (scope_die_for (type, context_die), type_die);
7985 for (link = TYPE_FIELDS (type);
7986 link != NULL; link = TREE_CHAIN (link))
7988 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
7990 add_name_attribute (enum_die,
7991 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
7992 add_AT_unsigned (enum_die, DW_AT_const_value,
7993 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
7997 add_AT_flag (type_die, DW_AT_declaration, 1);
8001 /* Generate a DIE to represent either a real live formal parameter decl or to
8002 represent just the type of some formal parameter position in some function
8005 Note that this routine is a bit unusual because its argument may be a
8006 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8007 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8008 node. If it's the former then this function is being called to output a
8009 DIE to represent a formal parameter object (or some inlining thereof). If
8010 it's the latter, then this function is only being called to output a
8011 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8012 argument type of some subprogram type. */
8015 gen_formal_parameter_die (node, context_die)
8017 register dw_die_ref context_die;
8019 register dw_die_ref parm_die
8020 = new_die (DW_TAG_formal_parameter, context_die);
8021 register tree origin;
8023 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8026 origin = decl_ultimate_origin (node);
8028 add_abstract_origin_attribute (parm_die, origin);
8031 add_name_and_src_coords_attributes (parm_die, node);
8032 add_type_attribute (parm_die, TREE_TYPE (node),
8033 TREE_READONLY (node),
8034 TREE_THIS_VOLATILE (node),
8036 if (DECL_ARTIFICIAL (node))
8037 add_AT_flag (parm_die, DW_AT_artificial, 1);
8040 equate_decl_number_to_die (node, parm_die);
8041 if (! DECL_ABSTRACT (node))
8042 add_location_or_const_value_attribute (parm_die, node);
8047 /* We were called with some kind of a ..._TYPE node. */
8048 add_type_attribute (parm_die, node, 0, 0, context_die);
8058 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8059 at the end of an (ANSI prototyped) formal parameters list. */
8062 gen_unspecified_parameters_die (decl_or_type, context_die)
8063 register tree decl_or_type;
8064 register dw_die_ref context_die;
8066 new_die (DW_TAG_unspecified_parameters, context_die);
8069 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8070 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8071 parameters as specified in some function type specification (except for
8072 those which appear as part of a function *definition*).
8074 Note we must be careful here to output all of the parameter DIEs before*
8075 we output any DIEs needed to represent the types of the formal parameters.
8076 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8077 non-parameter DIE it sees ends the formal parameter list. */
8080 gen_formal_types_die (function_or_method_type, context_die)
8081 register tree function_or_method_type;
8082 register dw_die_ref context_die;
8085 register tree formal_type = NULL;
8086 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8089 /* In the case where we are generating a formal types list for a C++
8090 non-static member function type, skip over the first thing on the
8091 TYPE_ARG_TYPES list because it only represents the type of the hidden
8092 `this pointer'. The debugger should be able to figure out (without
8093 being explicitly told) that this non-static member function type takes a
8094 `this pointer' and should be able to figure what the type of that hidden
8095 parameter is from the DW_AT_member attribute of the parent
8096 DW_TAG_subroutine_type DIE. */
8097 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8098 first_parm_type = TREE_CHAIN (first_parm_type);
8101 /* Make our first pass over the list of formal parameter types and output a
8102 DW_TAG_formal_parameter DIE for each one. */
8103 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8105 register dw_die_ref parm_die;
8107 formal_type = TREE_VALUE (link);
8108 if (formal_type == void_type_node)
8111 /* Output a (nameless) DIE to represent the formal parameter itself. */
8112 parm_die = gen_formal_parameter_die (formal_type, context_die);
8113 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8114 && link == first_parm_type)
8115 add_AT_flag (parm_die, DW_AT_artificial, 1);
8118 /* If this function type has an ellipsis, add a
8119 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8120 if (formal_type != void_type_node)
8121 gen_unspecified_parameters_die (function_or_method_type, context_die);
8123 /* Make our second (and final) pass over the list of formal parameter types
8124 and output DIEs to represent those types (as necessary). */
8125 for (link = TYPE_ARG_TYPES (function_or_method_type);
8127 link = TREE_CHAIN (link))
8129 formal_type = TREE_VALUE (link);
8130 if (formal_type == void_type_node)
8133 gen_type_die (formal_type, context_die);
8137 /* Generate a DIE to represent a declared function (either file-scope or
8141 gen_subprogram_die (decl, context_die)
8143 register dw_die_ref context_die;
8145 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8146 register tree origin = decl_ultimate_origin (decl);
8147 register dw_die_ref subr_die;
8148 register rtx fp_reg;
8149 register tree fn_arg_types;
8150 register tree outer_scope;
8151 register dw_die_ref old_die = lookup_decl_die (decl);
8152 register int declaration
8153 = (current_function_decl != decl
8155 && (context_die->die_tag == DW_TAG_structure_type
8156 || context_die->die_tag == DW_TAG_union_type)));
8160 subr_die = new_die (DW_TAG_subprogram, context_die);
8161 add_abstract_origin_attribute (subr_die, origin);
8163 else if (old_die && DECL_ABSTRACT (decl)
8164 && get_AT_unsigned (old_die, DW_AT_inline))
8166 /* This must be a redefinition of an extern inline function.
8167 We can just reuse the old die here. */
8170 /* Clear out the inlined attribute and parm types. */
8171 remove_AT (subr_die, DW_AT_inline);
8172 remove_children (subr_die);
8176 register unsigned file_index
8177 = lookup_filename (DECL_SOURCE_FILE (decl));
8179 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8182 /* If the definition comes from the same place as the declaration,
8183 maybe use the old DIE. We always want the DIE for this function
8184 that has the *_pc attributes to be under comp_unit_die so the
8185 debugger can find it. For inlines, that is the concrete instance,
8186 so we can use the old DIE here. For non-inline methods, we want a
8187 specification DIE at toplevel, so we need a new DIE. For local
8188 class methods, this does not apply. */
8189 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8190 || context_die == NULL)
8191 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8192 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8193 == DECL_SOURCE_LINE (decl)))
8197 /* Clear out the declaration attribute and the parm types. */
8198 remove_AT (subr_die, DW_AT_declaration);
8199 remove_children (subr_die);
8203 subr_die = new_die (DW_TAG_subprogram, context_die);
8204 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8205 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8206 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8207 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8208 != DECL_SOURCE_LINE (decl))
8210 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8215 register dw_die_ref scope_die;
8217 if (DECL_CONTEXT (decl))
8218 scope_die = scope_die_for (decl, context_die);
8220 /* Don't put block extern declarations under comp_unit_die. */
8221 scope_die = context_die;
8223 subr_die = new_die (DW_TAG_subprogram, scope_die);
8225 if (TREE_PUBLIC (decl))
8226 add_AT_flag (subr_die, DW_AT_external, 1);
8228 add_name_and_src_coords_attributes (subr_die, decl);
8229 if (debug_info_level > DINFO_LEVEL_TERSE)
8231 register tree type = TREE_TYPE (decl);
8233 add_prototyped_attribute (subr_die, type);
8234 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8237 add_pure_or_virtual_attribute (subr_die, decl);
8238 if (DECL_ARTIFICIAL (decl))
8239 add_AT_flag (subr_die, DW_AT_artificial, 1);
8240 if (TREE_PROTECTED (decl))
8241 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8242 else if (TREE_PRIVATE (decl))
8243 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8248 add_AT_flag (subr_die, DW_AT_declaration, 1);
8250 /* The first time we see a member function, it is in the context of
8251 the class to which it belongs. We make sure of this by emitting
8252 the class first. The next time is the definition, which is
8253 handled above. The two may come from the same source text. */
8254 if (DECL_CONTEXT (decl))
8255 equate_decl_number_to_die (decl, subr_die);
8257 else if (DECL_ABSTRACT (decl))
8259 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8260 but not for extern inline functions. We can't get this completely
8261 correct because information about whether the function was declared
8262 inline is not saved anywhere. */
8263 if (DECL_DEFER_OUTPUT (decl))
8265 if (DECL_INLINE (decl))
8266 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8268 add_AT_unsigned (subr_die, DW_AT_inline,
8269 DW_INL_declared_not_inlined);
8271 else if (DECL_INLINE (decl))
8272 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8276 equate_decl_number_to_die (decl, subr_die);
8278 else if (!DECL_EXTERNAL (decl))
8280 if (origin == NULL_TREE)
8281 equate_decl_number_to_die (decl, subr_die);
8283 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8284 current_funcdef_number);
8285 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8286 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8287 current_funcdef_number);
8288 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8290 add_pubname (decl, subr_die);
8291 add_arange (decl, subr_die);
8293 #ifdef MIPS_DEBUGGING_INFO
8294 /* Add a reference to the FDE for this routine. */
8295 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8298 /* Define the "frame base" location for this routine. We use the
8299 frame pointer or stack pointer registers, since the RTL for local
8300 variables is relative to one of them. */
8302 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8303 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8306 /* ??? This fails for nested inline functions, because context_display
8307 is not part of the state saved/restored for inline functions. */
8308 if (current_function_needs_context)
8309 add_AT_location_description (subr_die, DW_AT_static_link,
8310 lookup_static_chain (decl));
8314 /* Now output descriptions of the arguments for this function. This gets
8315 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8316 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8317 `...' at the end of the formal parameter list. In order to find out if
8318 there was a trailing ellipsis or not, we must instead look at the type
8319 associated with the FUNCTION_DECL. This will be a node of type
8320 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8321 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8322 an ellipsis at the end. */
8323 push_decl_scope (decl);
8325 /* In the case where we are describing a mere function declaration, all we
8326 need to do here (and all we *can* do here) is to describe the *types* of
8327 its formal parameters. */
8328 if (debug_info_level <= DINFO_LEVEL_TERSE)
8330 else if (declaration)
8331 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8334 /* Generate DIEs to represent all known formal parameters */
8335 register tree arg_decls = DECL_ARGUMENTS (decl);
8338 /* When generating DIEs, generate the unspecified_parameters DIE
8339 instead if we come across the arg "__builtin_va_alist" */
8340 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8341 if (TREE_CODE (parm) == PARM_DECL)
8343 if (DECL_NAME (parm)
8344 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8345 "__builtin_va_alist"))
8346 gen_unspecified_parameters_die (parm, subr_die);
8348 gen_decl_die (parm, subr_die);
8351 /* Decide whether we need a unspecified_parameters DIE at the end.
8352 There are 2 more cases to do this for: 1) the ansi ... declaration -
8353 this is detectable when the end of the arg list is not a
8354 void_type_node 2) an unprototyped function declaration (not a
8355 definition). This just means that we have no info about the
8356 parameters at all. */
8357 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8358 if (fn_arg_types != NULL)
8360 /* this is the prototyped case, check for ... */
8361 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8362 gen_unspecified_parameters_die (decl, subr_die);
8364 else if (DECL_INITIAL (decl) == NULL_TREE)
8365 gen_unspecified_parameters_die (decl, subr_die);
8368 /* Output Dwarf info for all of the stuff within the body of the function
8369 (if it has one - it may be just a declaration). */
8370 outer_scope = DECL_INITIAL (decl);
8372 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8373 node created to represent a function. This outermost BLOCK actually
8374 represents the outermost binding contour for the function, i.e. the
8375 contour in which the function's formal parameters and labels get
8376 declared. Curiously, it appears that the front end doesn't actually
8377 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8378 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8379 list for the function instead.) The BLOCK_VARS list for the
8380 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8381 the function however, and we output DWARF info for those in
8382 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8383 node representing the function's outermost pair of curly braces, and
8384 any blocks used for the base and member initializers of a C++
8385 constructor function. */
8386 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8388 current_function_has_inlines = 0;
8389 decls_for_scope (outer_scope, subr_die, 0);
8391 #if 0 && defined (MIPS_DEBUGGING_INFO)
8392 if (current_function_has_inlines)
8394 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8395 if (! comp_unit_has_inlines)
8397 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8398 comp_unit_has_inlines = 1;
8407 /* Generate a DIE to represent a declared data object. */
8410 gen_variable_die (decl, context_die)
8412 register dw_die_ref context_die;
8414 register tree origin = decl_ultimate_origin (decl);
8415 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8417 dw_die_ref old_die = lookup_decl_die (decl);
8419 = (DECL_EXTERNAL (decl)
8420 || current_function_decl != decl_function_context (decl)
8421 || context_die->die_tag == DW_TAG_structure_type
8422 || context_die->die_tag == DW_TAG_union_type);
8425 add_abstract_origin_attribute (var_die, origin);
8426 /* Loop unrolling can create multiple blocks that refer to the same
8427 static variable, so we must test for the DW_AT_declaration flag. */
8428 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8429 copy decls and set the DECL_ABSTRACT flag on them instead of
8431 else if (old_die && TREE_STATIC (decl)
8432 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8434 /* ??? This is an instantiation of a C++ class level static. */
8435 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8436 if (DECL_NAME (decl))
8438 register unsigned file_index
8439 = lookup_filename (DECL_SOURCE_FILE (decl));
8441 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8442 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8444 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8445 != DECL_SOURCE_LINE (decl))
8447 add_AT_unsigned (var_die, DW_AT_decl_line,
8448 DECL_SOURCE_LINE (decl));
8453 add_name_and_src_coords_attributes (var_die, decl);
8454 add_type_attribute (var_die, TREE_TYPE (decl),
8455 TREE_READONLY (decl),
8456 TREE_THIS_VOLATILE (decl), context_die);
8458 if (TREE_PUBLIC (decl))
8459 add_AT_flag (var_die, DW_AT_external, 1);
8461 if (DECL_ARTIFICIAL (decl))
8462 add_AT_flag (var_die, DW_AT_artificial, 1);
8464 if (TREE_PROTECTED (decl))
8465 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8467 else if (TREE_PRIVATE (decl))
8468 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8472 add_AT_flag (var_die, DW_AT_declaration, 1);
8474 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8475 equate_decl_number_to_die (decl, var_die);
8477 if (! declaration && ! DECL_ABSTRACT (decl))
8479 equate_decl_number_to_die (decl, var_die);
8480 add_location_or_const_value_attribute (var_die, decl);
8481 add_pubname (decl, var_die);
8485 /* Generate a DIE to represent a label identifier. */
8488 gen_label_die (decl, context_die)
8490 register dw_die_ref context_die;
8492 register tree origin = decl_ultimate_origin (decl);
8493 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8495 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8496 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8499 add_abstract_origin_attribute (lbl_die, origin);
8501 add_name_and_src_coords_attributes (lbl_die, decl);
8503 if (DECL_ABSTRACT (decl))
8504 equate_decl_number_to_die (decl, lbl_die);
8507 insn = DECL_RTL (decl);
8508 if (GET_CODE (insn) == CODE_LABEL)
8510 /* When optimization is enabled (via -O) some parts of the compiler
8511 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8512 represent source-level labels which were explicitly declared by
8513 the user. This really shouldn't be happening though, so catch
8514 it if it ever does happen. */
8515 if (INSN_DELETED_P (insn))
8518 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8519 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8520 (unsigned) INSN_UID (insn));
8521 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8526 /* Generate a DIE for a lexical block. */
8529 gen_lexical_block_die (stmt, context_die, depth)
8531 register dw_die_ref context_die;
8534 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8535 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8537 if (! BLOCK_ABSTRACT (stmt))
8539 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8541 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8542 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8543 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8546 push_decl_scope (stmt);
8547 decls_for_scope (stmt, stmt_die, depth);
8551 /* Generate a DIE for an inlined subprogram. */
8554 gen_inlined_subroutine_die (stmt, context_die, depth)
8556 register dw_die_ref context_die;
8559 if (! BLOCK_ABSTRACT (stmt))
8561 register dw_die_ref subr_die
8562 = new_die (DW_TAG_inlined_subroutine, context_die);
8563 register tree decl = block_ultimate_origin (stmt);
8564 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8566 add_abstract_origin_attribute (subr_die, decl);
8567 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8569 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8570 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8571 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8572 push_decl_scope (decl);
8573 decls_for_scope (stmt, subr_die, depth);
8575 current_function_has_inlines = 1;
8579 /* Generate a DIE for a field in a record, or structure. */
8582 gen_field_die (decl, context_die)
8584 register dw_die_ref context_die;
8586 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8588 add_name_and_src_coords_attributes (decl_die, decl);
8589 add_type_attribute (decl_die, member_declared_type (decl),
8590 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8593 /* If this is a bit field... */
8594 if (DECL_BIT_FIELD_TYPE (decl))
8596 add_byte_size_attribute (decl_die, decl);
8597 add_bit_size_attribute (decl_die, decl);
8598 add_bit_offset_attribute (decl_die, decl);
8601 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8602 add_data_member_location_attribute (decl_die, decl);
8604 if (DECL_ARTIFICIAL (decl))
8605 add_AT_flag (decl_die, DW_AT_artificial, 1);
8607 if (TREE_PROTECTED (decl))
8608 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8610 else if (TREE_PRIVATE (decl))
8611 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8615 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8616 Use modified_type_die instead.
8617 We keep this code here just in case these types of DIEs may be needed to
8618 represent certain things in other languages (e.g. Pascal) someday. */
8620 gen_pointer_type_die (type, context_die)
8622 register dw_die_ref context_die;
8624 register dw_die_ref ptr_die
8625 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8627 equate_type_number_to_die (type, ptr_die);
8628 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8629 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8632 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8633 Use modified_type_die instead.
8634 We keep this code here just in case these types of DIEs may be needed to
8635 represent certain things in other languages (e.g. Pascal) someday. */
8637 gen_reference_type_die (type, context_die)
8639 register dw_die_ref context_die;
8641 register dw_die_ref ref_die
8642 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8644 equate_type_number_to_die (type, ref_die);
8645 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8646 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8650 /* Generate a DIE for a pointer to a member type. */
8652 gen_ptr_to_mbr_type_die (type, context_die)
8654 register dw_die_ref context_die;
8656 register dw_die_ref ptr_die
8657 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8659 equate_type_number_to_die (type, ptr_die);
8660 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8661 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8662 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8665 /* Generate the DIE for the compilation unit. */
8668 gen_compile_unit_die (main_input_filename)
8669 register char *main_input_filename;
8672 char *wd = getpwd ();
8674 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8675 add_name_attribute (comp_unit_die, main_input_filename);
8678 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8680 sprintf (producer, "%s %s", language_string, version_string);
8682 #ifdef MIPS_DEBUGGING_INFO
8683 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8684 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8685 not appear in the producer string, the debugger reaches the conclusion
8686 that the object file is stripped and has no debugging information.
8687 To get the MIPS/SGI debugger to believe that there is debugging
8688 information in the object file, we add a -g to the producer string. */
8689 if (debug_info_level > DINFO_LEVEL_TERSE)
8690 strcat (producer, " -g");
8693 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8695 if (strcmp (language_string, "GNU C++") == 0)
8696 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8698 else if (strcmp (language_string, "GNU Ada") == 0)
8699 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8701 else if (strcmp (language_string, "GNU F77") == 0)
8702 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8704 else if (strcmp (language_string, "GNU Pascal") == 0)
8705 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8707 else if (flag_traditional)
8708 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8711 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8713 #if 0 /* unimplemented */
8714 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8715 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8719 /* Generate a DIE for a string type. */
8722 gen_string_type_die (type, context_die)
8724 register dw_die_ref context_die;
8726 register dw_die_ref type_die
8727 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8729 equate_type_number_to_die (type, type_die);
8731 /* Fudge the string length attribute for now. */
8733 /* TODO: add string length info.
8734 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8735 bound_representation (upper_bound, 0, 'u'); */
8738 /* Generate the DIE for a base class. */
8741 gen_inheritance_die (binfo, context_die)
8742 register tree binfo;
8743 register dw_die_ref context_die;
8745 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8747 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8748 add_data_member_location_attribute (die, binfo);
8750 if (TREE_VIA_VIRTUAL (binfo))
8751 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
8752 if (TREE_VIA_PUBLIC (binfo))
8753 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
8754 else if (TREE_VIA_PROTECTED (binfo))
8755 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
8758 /* Generate a DIE for a class member. */
8761 gen_member_die (type, context_die)
8763 register dw_die_ref context_die;
8765 register tree member;
8767 /* If this is not an incomplete type, output descriptions of each of its
8768 members. Note that as we output the DIEs necessary to represent the
8769 members of this record or union type, we will also be trying to output
8770 DIEs to represent the *types* of those members. However the `type'
8771 function (above) will specifically avoid generating type DIEs for member
8772 types *within* the list of member DIEs for this (containing) type execpt
8773 for those types (of members) which are explicitly marked as also being
8774 members of this (containing) type themselves. The g++ front- end can
8775 force any given type to be treated as a member of some other
8776 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8777 to point to the TREE node representing the appropriate (containing)
8780 /* First output info about the base classes. */
8781 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
8783 register tree bases = TYPE_BINFO_BASETYPES (type);
8784 register int n_bases = TREE_VEC_LENGTH (bases);
8787 for (i = 0; i < n_bases; i++)
8788 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
8791 /* Now output info about the data members and type members. */
8792 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
8793 gen_decl_die (member, context_die);
8795 /* Now output info about the function members (if any). */
8796 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
8797 gen_decl_die (member, context_die);
8800 /* Generate a DIE for a structure or union type. */
8803 gen_struct_or_union_type_die (type, context_die)
8805 register dw_die_ref context_die;
8807 register dw_die_ref type_die = lookup_type_die (type);
8808 register dw_die_ref scope_die = 0;
8809 register int nested = 0;
8811 if (type_die && ! TYPE_SIZE (type))
8814 if (TYPE_CONTEXT (type) != NULL_TREE
8815 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't')
8818 scope_die = scope_die_for (type, context_die);
8820 if (! type_die || (nested && scope_die == comp_unit_die))
8821 /* First occurrence of type or toplevel definition of nested class. */
8823 register dw_die_ref old_die = type_die;
8825 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
8826 ? DW_TAG_structure_type : DW_TAG_union_type,
8828 equate_type_number_to_die (type, type_die);
8829 add_name_attribute (type_die, type_tag (type));
8831 add_AT_die_ref (type_die, DW_AT_specification, old_die);
8834 remove_AT (type_die, DW_AT_declaration);
8836 /* If we're not in the right context to be defining this type, defer to
8837 avoid tricky recursion. */
8838 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
8840 add_AT_flag (type_die, DW_AT_declaration, 1);
8843 /* If this type has been completed, then give it a byte_size attribute and
8844 then give a list of members. */
8845 else if (TYPE_SIZE (type))
8847 /* Prevent infinite recursion in cases where the type of some member of
8848 this type is expressed in terms of this type itself. */
8849 TREE_ASM_WRITTEN (type) = 1;
8850 add_byte_size_attribute (type_die, type);
8851 if (TYPE_STUB_DECL (type) != NULL_TREE)
8852 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8854 /* If the first reference to this type was as the return type of an
8855 inline function, then it may not have a parent. Fix this now. */
8856 if (type_die->die_parent == NULL)
8857 add_child_die (scope_die, type_die);
8859 push_decl_scope (type);
8860 gen_member_die (type, type_die);
8863 /* GNU extension: Record what type our vtable lives in. */
8864 if (TYPE_VFIELD (type))
8866 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
8868 gen_type_die (vtype, context_die);
8869 add_AT_die_ref (type_die, DW_AT_containing_type,
8870 lookup_type_die (vtype));
8874 add_AT_flag (type_die, DW_AT_declaration, 1);
8877 /* Generate a DIE for a subroutine _type_. */
8880 gen_subroutine_type_die (type, context_die)
8882 register dw_die_ref context_die;
8884 register tree return_type = TREE_TYPE (type);
8885 register dw_die_ref subr_die
8886 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
8888 equate_type_number_to_die (type, subr_die);
8889 add_prototyped_attribute (subr_die, type);
8890 add_type_attribute (subr_die, return_type, 0, 0, context_die);
8891 gen_formal_types_die (type, subr_die);
8894 /* Generate a DIE for a type definition */
8897 gen_typedef_die (decl, context_die)
8899 register dw_die_ref context_die;
8901 register dw_die_ref type_die;
8902 register tree origin;
8904 if (TREE_ASM_WRITTEN (decl))
8906 TREE_ASM_WRITTEN (decl) = 1;
8908 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
8909 origin = decl_ultimate_origin (decl);
8911 add_abstract_origin_attribute (type_die, origin);
8915 add_name_and_src_coords_attributes (type_die, decl);
8916 if (DECL_ORIGINAL_TYPE (decl))
8918 type = DECL_ORIGINAL_TYPE (decl);
8919 equate_type_number_to_die (TREE_TYPE (decl), type_die);
8922 type = TREE_TYPE (decl);
8923 add_type_attribute (type_die, type, TREE_READONLY (decl),
8924 TREE_THIS_VOLATILE (decl), context_die);
8927 if (DECL_ABSTRACT (decl))
8928 equate_decl_number_to_die (decl, type_die);
8931 /* Generate a type description DIE. */
8934 gen_type_die (type, context_die)
8936 register dw_die_ref context_die;
8938 if (type == NULL_TREE || type == error_mark_node)
8941 /* We are going to output a DIE to represent the unqualified version of
8942 this type (i.e. without any const or volatile qualifiers) so get the
8943 main variant (i.e. the unqualified version) of this type now. */
8944 type = type_main_variant (type);
8946 if (TREE_ASM_WRITTEN (type))
8949 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8950 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
8952 TREE_ASM_WRITTEN (type) = 1;
8953 gen_decl_die (TYPE_NAME (type), context_die);
8957 switch (TREE_CODE (type))
8963 case REFERENCE_TYPE:
8964 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8965 ensures that the gen_type_die recursion will terminate even if the
8966 type is recursive. Recursive types are possible in Ada. */
8967 /* ??? We could perhaps do this for all types before the switch
8969 TREE_ASM_WRITTEN (type) = 1;
8971 /* For these types, all that is required is that we output a DIE (or a
8972 set of DIEs) to represent the "basis" type. */
8973 gen_type_die (TREE_TYPE (type), context_die);
8977 /* This code is used for C++ pointer-to-data-member types.
8978 Output a description of the relevant class type. */
8979 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
8981 /* Output a description of the type of the object pointed to. */
8982 gen_type_die (TREE_TYPE (type), context_die);
8984 /* Now output a DIE to represent this pointer-to-data-member type
8986 gen_ptr_to_mbr_type_die (type, context_die);
8990 gen_type_die (TYPE_DOMAIN (type), context_die);
8991 gen_set_type_die (type, context_die);
8995 gen_type_die (TREE_TYPE (type), context_die);
8996 abort (); /* No way to represent these in Dwarf yet! */
9000 /* Force out return type (in case it wasn't forced out already). */
9001 gen_type_die (TREE_TYPE (type), context_die);
9002 gen_subroutine_type_die (type, context_die);
9006 /* Force out return type (in case it wasn't forced out already). */
9007 gen_type_die (TREE_TYPE (type), context_die);
9008 gen_subroutine_type_die (type, context_die);
9012 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9014 gen_type_die (TREE_TYPE (type), context_die);
9015 gen_string_type_die (type, context_die);
9018 gen_array_type_die (type, context_die);
9024 case QUAL_UNION_TYPE:
9025 /* If this is a nested type whose containing class hasn't been
9026 written out yet, writing it out will cover this one, too. */
9027 if (TYPE_CONTEXT (type)
9028 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9029 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9031 gen_type_die (TYPE_CONTEXT (type), context_die);
9033 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9036 /* If that failed, attach ourselves to the stub. */
9037 push_decl_scope (TYPE_CONTEXT (type));
9038 context_die = lookup_type_die (TYPE_CONTEXT (type));
9041 if (TREE_CODE (type) == ENUMERAL_TYPE)
9042 gen_enumeration_type_die (type, context_die);
9044 gen_struct_or_union_type_die (type, context_die);
9046 if (TYPE_CONTEXT (type)
9047 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9048 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9051 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9052 it up if it is ever completed. gen_*_type_die will set it for us
9053 when appropriate. */
9062 /* No DIEs needed for fundamental types. */
9066 /* No Dwarf representation currently defined. */
9073 TREE_ASM_WRITTEN (type) = 1;
9076 /* Generate a DIE for a tagged type instantiation. */
9079 gen_tagged_type_instantiation_die (type, context_die)
9081 register dw_die_ref context_die;
9083 if (type == NULL_TREE || type == error_mark_node)
9086 /* We are going to output a DIE to represent the unqualified version of
9087 this type (i.e. without any const or volatile qualifiers) so make sure
9088 that we have the main variant (i.e. the unqualified version) of this
9090 if (type != type_main_variant (type)
9091 || !TREE_ASM_WRITTEN (type))
9094 switch (TREE_CODE (type))
9100 gen_inlined_enumeration_type_die (type, context_die);
9104 gen_inlined_structure_type_die (type, context_die);
9108 case QUAL_UNION_TYPE:
9109 gen_inlined_union_type_die (type, context_die);
9117 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9118 things which are local to the given block. */
9121 gen_block_die (stmt, context_die, depth)
9123 register dw_die_ref context_die;
9126 register int must_output_die = 0;
9127 register tree origin;
9129 register enum tree_code origin_code;
9131 /* Ignore blocks never really used to make RTL. */
9133 if (stmt == NULL_TREE || !TREE_USED (stmt))
9136 /* Determine the "ultimate origin" of this block. This block may be an
9137 inlined instance of an inlined instance of inline function, so we have
9138 to trace all of the way back through the origin chain to find out what
9139 sort of node actually served as the original seed for the creation of
9140 the current block. */
9141 origin = block_ultimate_origin (stmt);
9142 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9144 /* Determine if we need to output any Dwarf DIEs at all to represent this
9146 if (origin_code == FUNCTION_DECL)
9147 /* The outer scopes for inlinings *must* always be represented. We
9148 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9149 must_output_die = 1;
9152 /* In the case where the current block represents an inlining of the
9153 "body block" of an inline function, we must *NOT* output any DIE for
9154 this block because we have already output a DIE to represent the
9155 whole inlined function scope and the "body block" of any function
9156 doesn't really represent a different scope according to ANSI C
9157 rules. So we check here to make sure that this block does not
9158 represent a "body block inlining" before trying to set the
9159 `must_output_die' flag. */
9160 if (! is_body_block (origin ? origin : stmt))
9162 /* Determine if this block directly contains any "significant"
9163 local declarations which we will need to output DIEs for. */
9164 if (debug_info_level > DINFO_LEVEL_TERSE)
9165 /* We are not in terse mode so *any* local declaration counts
9166 as being a "significant" one. */
9167 must_output_die = (BLOCK_VARS (stmt) != NULL);
9169 /* We are in terse mode, so only local (nested) function
9170 definitions count as "significant" local declarations. */
9171 for (decl = BLOCK_VARS (stmt);
9172 decl != NULL; decl = TREE_CHAIN (decl))
9173 if (TREE_CODE (decl) == FUNCTION_DECL
9174 && DECL_INITIAL (decl))
9176 must_output_die = 1;
9182 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9183 DIE for any block which contains no significant local declarations at
9184 all. Rather, in such cases we just call `decls_for_scope' so that any
9185 needed Dwarf info for any sub-blocks will get properly generated. Note
9186 that in terse mode, our definition of what constitutes a "significant"
9187 local declaration gets restricted to include only inlined function
9188 instances and local (nested) function definitions. */
9189 if (must_output_die)
9191 if (origin_code == FUNCTION_DECL)
9192 gen_inlined_subroutine_die (stmt, context_die, depth);
9194 gen_lexical_block_die (stmt, context_die, depth);
9197 decls_for_scope (stmt, context_die, depth);
9200 /* Generate all of the decls declared within a given scope and (recursively)
9201 all of its sub-blocks. */
9204 decls_for_scope (stmt, context_die, depth)
9206 register dw_die_ref context_die;
9210 register tree subblocks;
9212 /* Ignore blocks never really used to make RTL. */
9213 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9216 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9217 next_block_number++;
9219 /* Output the DIEs to represent all of the data objects and typedefs
9220 declared directly within this block but not within any nested
9221 sub-blocks. Also, nested function and tag DIEs have been
9222 generated with a parent of NULL; fix that up now. */
9223 for (decl = BLOCK_VARS (stmt);
9224 decl != NULL; decl = TREE_CHAIN (decl))
9226 register dw_die_ref die;
9228 if (TREE_CODE (decl) == FUNCTION_DECL)
9229 die = lookup_decl_die (decl);
9230 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9231 die = lookup_type_die (TREE_TYPE (decl));
9235 if (die != NULL && die->die_parent == NULL)
9236 add_child_die (context_die, die);
9238 gen_decl_die (decl, context_die);
9241 /* Output the DIEs to represent all sub-blocks (and the items declared
9242 therein) of this block. */
9243 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9245 subblocks = BLOCK_CHAIN (subblocks))
9246 gen_block_die (subblocks, context_die, depth + 1);
9249 /* Is this a typedef we can avoid emitting? */
9252 is_redundant_typedef (decl)
9255 if (TYPE_DECL_IS_STUB (decl))
9258 if (DECL_ARTIFICIAL (decl)
9259 && DECL_CONTEXT (decl)
9260 && is_tagged_type (DECL_CONTEXT (decl))
9261 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9262 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9263 /* Also ignore the artificial member typedef for the class name. */
9269 /* Generate Dwarf debug information for a decl described by DECL. */
9272 gen_decl_die (decl, context_die)
9274 register dw_die_ref context_die;
9276 register tree origin;
9278 /* Make a note of the decl node we are going to be working on. We may need
9279 to give the user the source coordinates of where it appeared in case we
9280 notice (later on) that something about it looks screwy. */
9281 dwarf_last_decl = decl;
9283 if (TREE_CODE (decl) == ERROR_MARK)
9286 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9287 ignore a function definition, since that would screw up our count of
9288 blocks, and that in turn will completely screw up the labels we will
9289 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9290 subsequent blocks). */
9291 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9294 switch (TREE_CODE (decl))
9297 /* The individual enumerators of an enum type get output when we output
9298 the Dwarf representation of the relevant enum type itself. */
9302 /* Don't output any DIEs to represent mere function declarations,
9303 unless they are class members or explicit block externs. */
9304 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9305 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9308 if (debug_info_level > DINFO_LEVEL_TERSE)
9310 /* Before we describe the FUNCTION_DECL itself, make sure that we
9311 have described its return type. */
9312 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9314 /* And its containing type. */
9315 origin = decl_class_context (decl);
9316 if (origin != NULL_TREE)
9317 gen_type_die (origin, context_die);
9319 /* And its virtual context. */
9320 if (DECL_VINDEX (decl) != NULL_TREE)
9321 gen_type_die (DECL_CONTEXT (decl), context_die);
9324 /* Now output a DIE to represent the function itself. */
9325 gen_subprogram_die (decl, context_die);
9329 /* If we are in terse mode, don't generate any DIEs to represent any
9331 if (debug_info_level <= DINFO_LEVEL_TERSE)
9334 /* In the special case of a TYPE_DECL node representing the
9335 declaration of some type tag, if the given TYPE_DECL is marked as
9336 having been instantiated from some other (original) TYPE_DECL node
9337 (e.g. one which was generated within the original definition of an
9338 inline function) we have to generate a special (abbreviated)
9339 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9341 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9343 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9347 if (is_redundant_typedef (decl))
9348 gen_type_die (TREE_TYPE (decl), context_die);
9350 /* Output a DIE to represent the typedef itself. */
9351 gen_typedef_die (decl, context_die);
9355 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9356 gen_label_die (decl, context_die);
9360 /* If we are in terse mode, don't generate any DIEs to represent any
9361 variable declarations or definitions. */
9362 if (debug_info_level <= DINFO_LEVEL_TERSE)
9365 /* Output any DIEs that are needed to specify the type of this data
9367 gen_type_die (TREE_TYPE (decl), context_die);
9369 /* And its containing type. */
9370 origin = decl_class_context (decl);
9371 if (origin != NULL_TREE)
9372 gen_type_die (origin, context_die);
9374 /* Now output the DIE to represent the data object itself. This gets
9375 complicated because of the possibility that the VAR_DECL really
9376 represents an inlined instance of a formal parameter for an inline
9378 origin = decl_ultimate_origin (decl);
9379 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9380 gen_formal_parameter_die (decl, context_die);
9382 gen_variable_die (decl, context_die);
9386 /* Ignore the nameless fields that are used to skip bits, but
9387 handle C++ anonymous unions. */
9388 if (DECL_NAME (decl) != NULL_TREE
9389 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9391 gen_type_die (member_declared_type (decl), context_die);
9392 gen_field_die (decl, context_die);
9397 gen_type_die (TREE_TYPE (decl), context_die);
9398 gen_formal_parameter_die (decl, context_die);
9406 /* Write the debugging output for DECL. */
9409 dwarf2out_decl (decl)
9412 register dw_die_ref context_die = comp_unit_die;
9414 if (TREE_CODE (decl) == ERROR_MARK)
9417 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9418 hope that the node in question doesn't represent a function definition.
9419 If it does, then totally ignoring it is bound to screw up our count of
9420 blocks, and that in turn will completely screw up the labels we will
9421 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9422 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9423 own sequence numbers with them!) */
9424 if (DECL_IGNORED_P (decl))
9426 if (TREE_CODE (decl) == FUNCTION_DECL
9427 && DECL_INITIAL (decl) != NULL)
9433 switch (TREE_CODE (decl))
9436 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9437 builtin function. Explicit programmer-supplied declarations of
9438 these same functions should NOT be ignored however. */
9439 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9442 /* What we would really like to do here is to filter out all mere
9443 file-scope declarations of file-scope functions which are never
9444 referenced later within this translation unit (and keep all of ones
9445 that *are* referenced later on) but we aren't clairvoyant, so we have
9446 no idea which functions will be referenced in the future (i.e. later
9447 on within the current translation unit). So here we just ignore all
9448 file-scope function declarations which are not also definitions. If
9449 and when the debugger needs to know something about these functions,
9450 it wil have to hunt around and find the DWARF information associated
9451 with the definition of the function. Note that we can't just check
9452 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9453 definitions and which ones represent mere declarations. We have to
9454 check `DECL_INITIAL' instead. That's because the C front-end
9455 supports some weird semantics for "extern inline" function
9456 definitions. These can get inlined within the current translation
9457 unit (an thus, we need to generate DWARF info for their abstract
9458 instances so that the DWARF info for the concrete inlined instances
9459 can have something to refer to) but the compiler never generates any
9460 out-of-lines instances of such things (despite the fact that they
9461 *are* definitions). The important point is that the C front-end
9462 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9463 to generate DWARF for them anyway. Note that the C++ front-end also
9464 plays some similar games for inline function definitions appearing
9465 within include files which also contain
9466 `#pragma interface' pragmas. */
9467 if (DECL_INITIAL (decl) == NULL_TREE)
9470 /* If we're a nested function, initially use a parent of NULL; if we're
9471 a plain function, this will be fixed up in decls_for_scope. If
9472 we're a method, it will be ignored, since we already have a DIE. */
9473 if (decl_function_context (decl))
9479 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9480 declaration and if the declaration was never even referenced from
9481 within this entire compilation unit. We suppress these DIEs in
9482 order to save space in the .debug section (by eliminating entries
9483 which are probably useless). Note that we must not suppress
9484 block-local extern declarations (whether used or not) because that
9485 would screw-up the debugger's name lookup mechanism and cause it to
9486 miss things which really ought to be in scope at a given point. */
9487 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9490 /* If we are in terse mode, don't generate any DIEs to represent any
9491 variable declarations or definitions. */
9492 if (debug_info_level <= DINFO_LEVEL_TERSE)
9497 /* Don't bother trying to generate any DIEs to represent any of the
9498 normal built-in types for the language we are compiling. */
9499 if (DECL_SOURCE_LINE (decl) == 0)
9501 /* OK, we need to generate one for `bool' so GDB knows what type
9502 comparisons have. */
9503 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9504 == DW_LANG_C_plus_plus)
9505 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9506 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9511 /* If we are in terse mode, don't generate any DIEs for types. */
9512 if (debug_info_level <= DINFO_LEVEL_TERSE)
9515 /* If we're a function-scope tag, initially use a parent of NULL;
9516 this will be fixed up in decls_for_scope. */
9517 if (decl_function_context (decl))
9526 gen_decl_die (decl, context_die);
9527 output_pending_types_for_scope (comp_unit_die);
9530 /* Output a marker (i.e. a label) for the beginning of the generated code for
9534 dwarf2out_begin_block (blocknum)
9535 register unsigned blocknum;
9537 function_section (current_function_decl);
9538 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9541 /* Output a marker (i.e. a label) for the end of the generated code for a
9545 dwarf2out_end_block (blocknum)
9546 register unsigned blocknum;
9548 function_section (current_function_decl);
9549 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9552 /* Output a marker (i.e. a label) at a point in the assembly code which
9553 corresponds to a given source level label. */
9556 dwarf2out_label (insn)
9559 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9561 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9563 function_section (current_function_decl);
9564 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9565 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9566 (unsigned) INSN_UID (insn));
9570 /* Lookup a filename (in the list of filenames that we know about here in
9571 dwarf2out.c) and return its "index". The index of each (known) filename is
9572 just a unique number which is associated with only that one filename.
9573 We need such numbers for the sake of generating labels
9574 (in the .debug_sfnames section) and references to those
9575 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9576 If the filename given as an argument is not found in our current list,
9577 add it to the list and assign it the next available unique index number.
9578 In order to speed up searches, we remember the index of the filename
9579 was looked up last. This handles the majority of all searches. */
9582 lookup_filename (file_name)
9585 static unsigned last_file_lookup_index = 0;
9586 register unsigned i;
9588 /* Check to see if the file name that was searched on the previous call
9589 matches this file name. If so, return the index. */
9590 if (last_file_lookup_index != 0)
9591 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9592 return last_file_lookup_index;
9594 /* Didn't match the previous lookup, search the table */
9595 for (i = 1; i < file_table_in_use; ++i)
9596 if (strcmp (file_name, file_table[i]) == 0)
9598 last_file_lookup_index = i;
9602 /* Prepare to add a new table entry by making sure there is enough space in
9603 the table to do so. If not, expand the current table. */
9604 if (file_table_in_use == file_table_allocated)
9606 file_table_allocated += FILE_TABLE_INCREMENT;
9608 = (char **) xrealloc (file_table,
9609 file_table_allocated * sizeof (char *));
9612 /* Add the new entry to the end of the filename table. */
9613 file_table[file_table_in_use] = xstrdup (file_name);
9614 last_file_lookup_index = file_table_in_use++;
9616 return last_file_lookup_index;
9619 /* Output a label to mark the beginning of a source code line entry
9620 and record information relating to this source line, in
9621 'line_info_table' for later output of the .debug_line section. */
9624 dwarf2out_line (filename, line)
9625 register char *filename;
9626 register unsigned line;
9628 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9630 function_section (current_function_decl);
9632 if (DECL_SECTION_NAME (current_function_decl))
9634 register dw_separate_line_info_ref line_info;
9635 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9636 separate_line_info_table_in_use);
9637 fputc ('\n', asm_out_file);
9639 /* expand the line info table if necessary */
9640 if (separate_line_info_table_in_use
9641 == separate_line_info_table_allocated)
9643 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9644 separate_line_info_table
9645 = (dw_separate_line_info_ref)
9646 xrealloc (separate_line_info_table,
9647 separate_line_info_table_allocated
9648 * sizeof (dw_separate_line_info_entry));
9651 /* Add the new entry at the end of the line_info_table. */
9653 = &separate_line_info_table[separate_line_info_table_in_use++];
9654 line_info->dw_file_num = lookup_filename (filename);
9655 line_info->dw_line_num = line;
9656 line_info->function = current_funcdef_number;
9660 register dw_line_info_ref line_info;
9662 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9663 line_info_table_in_use);
9664 fputc ('\n', asm_out_file);
9666 /* Expand the line info table if necessary. */
9667 if (line_info_table_in_use == line_info_table_allocated)
9669 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9671 = (dw_line_info_ref)
9672 xrealloc (line_info_table,
9673 (line_info_table_allocated
9674 * sizeof (dw_line_info_entry)));
9677 /* Add the new entry at the end of the line_info_table. */
9678 line_info = &line_info_table[line_info_table_in_use++];
9679 line_info->dw_file_num = lookup_filename (filename);
9680 line_info->dw_line_num = line;
9685 /* Record the beginning of a new source file, for later output
9686 of the .debug_macinfo section. At present, unimplemented. */
9689 dwarf2out_start_source_file (filename)
9690 register char *filename ATTRIBUTE_UNUSED;
9694 /* Record the end of a source file, for later output
9695 of the .debug_macinfo section. At present, unimplemented. */
9698 dwarf2out_end_source_file ()
9702 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9703 the tail part of the directive line, i.e. the part which is past the
9704 initial whitespace, #, whitespace, directive-name, whitespace part. */
9707 dwarf2out_define (lineno, buffer)
9708 register unsigned lineno;
9709 register char *buffer;
9711 static int initialized = 0;
9714 dwarf2out_start_source_file (primary_filename);
9719 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9720 the tail part of the directive line, i.e. the part which is past the
9721 initial whitespace, #, whitespace, directive-name, whitespace part. */
9724 dwarf2out_undef (lineno, buffer)
9725 register unsigned lineno ATTRIBUTE_UNUSED;
9726 register char *buffer ATTRIBUTE_UNUSED;
9730 /* Set up for Dwarf output at the start of compilation. */
9733 dwarf2out_init (asm_out_file, main_input_filename)
9734 register FILE *asm_out_file;
9735 register char *main_input_filename;
9737 /* Remember the name of the primary input file. */
9738 primary_filename = main_input_filename;
9740 /* Allocate the initial hunk of the file_table. */
9741 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
9742 bzero ((char *) file_table, FILE_TABLE_INCREMENT * sizeof (char *));
9743 file_table_allocated = FILE_TABLE_INCREMENT;
9745 /* Skip the first entry - file numbers begin at 1. */
9746 file_table_in_use = 1;
9748 /* Allocate the initial hunk of the decl_die_table. */
9750 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9751 bzero ((char *) decl_die_table,
9752 DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9753 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
9754 decl_die_table_in_use = 0;
9756 /* Allocate the initial hunk of the decl_scope_table. */
9758 = (decl_scope_node *) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9759 * sizeof (decl_scope_node));
9760 bzero ((char *) decl_scope_table,
9761 DECL_SCOPE_TABLE_INCREMENT * sizeof (decl_scope_node));
9762 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
9763 decl_scope_depth = 0;
9765 /* Allocate the initial hunk of the abbrev_die_table. */
9767 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9768 * sizeof (dw_die_ref));
9769 bzero ((char *) abbrev_die_table,
9770 ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9771 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
9772 /* Zero-th entry is allocated, but unused */
9773 abbrev_die_table_in_use = 1;
9775 /* Allocate the initial hunk of the line_info_table. */
9777 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
9778 * sizeof (dw_line_info_entry));
9779 bzero ((char *) line_info_table,
9780 LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry));
9781 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
9782 /* Zero-th entry is allocated, but unused */
9783 line_info_table_in_use = 1;
9785 /* Generate the initial DIE for the .debug section. Note that the (string)
9786 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9787 will (typically) be a relative pathname and that this pathname should be
9788 taken as being relative to the directory from which the compiler was
9789 invoked when the given (base) source file was compiled. */
9790 gen_compile_unit_die (main_input_filename);
9792 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
9795 /* Output stuff that dwarf requires at the end of every file,
9796 and generate the DWARF-2 debugging info. */
9801 limbo_die_node *node, *next_node;
9805 /* Traverse the limbo die list, and add parent/child links. The only
9806 dies without parents that should be here are concrete instances of
9807 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9808 For concrete instances, we can get the parent die from the abstract
9810 for (node = limbo_die_list; node; node = next_node)
9812 next_node = node->next;
9815 if (die->die_parent == NULL)
9817 a = get_AT (die, DW_AT_abstract_origin);
9819 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
9820 else if (die == comp_unit_die)
9828 /* Traverse the DIE tree and add sibling attributes to those DIE's
9829 that have children. */
9830 add_sibling_attributes (comp_unit_die);
9832 /* Output a terminator label for the .text section. */
9833 fputc ('\n', asm_out_file);
9834 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
9835 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
9838 /* Output a terminator label for the .data section. */
9839 fputc ('\n', asm_out_file);
9840 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
9841 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
9843 /* Output a terminator label for the .bss section. */
9844 fputc ('\n', asm_out_file);
9845 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
9846 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
9849 /* Output the source line correspondence table. */
9850 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
9852 fputc ('\n', asm_out_file);
9853 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
9854 output_line_info ();
9856 /* We can only use the low/high_pc attributes if all of the code
9858 if (separate_line_info_table_in_use == 0)
9860 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc,
9861 stripattributes (TEXT_SECTION));
9862 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
9865 add_AT_section_offset (comp_unit_die, DW_AT_stmt_list, DEBUG_LINE_SECTION);
9868 /* Output the abbreviation table. */
9869 fputc ('\n', asm_out_file);
9870 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
9871 build_abbrev_table (comp_unit_die);
9872 output_abbrev_section ();
9874 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9875 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
9876 calc_die_sizes (comp_unit_die);
9878 /* Output debugging information. */
9879 fputc ('\n', asm_out_file);
9880 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
9881 output_compilation_unit_header ();
9882 output_die (comp_unit_die);
9884 if (pubname_table_in_use)
9886 /* Output public names table. */
9887 fputc ('\n', asm_out_file);
9888 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
9892 if (fde_table_in_use)
9894 /* Output the address range information. */
9895 fputc ('\n', asm_out_file);
9896 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
9900 #endif /* DWARF2_DEBUGGING_INFO */