1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 93, 95-98, 1999 Free Software Foundation, Inc.
3 Contributed by Gary Funck (gary@intrepid.com).
4 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
5 Extensively modified by Jason Merrill (jason@cygnus.com).
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* The first part of this file deals with the DWARF 2 frame unwind
25 information, which is also used by the GCC efficient exception handling
26 mechanism. The second part, controlled only by an #ifdef
27 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
36 #include "hard-reg-set.h"
38 #include "insn-config.h"
44 #include "dwarf2out.h"
46 #include "dyn-string.h"
48 /* We cannot use <assert.h> in GCC source, since that would include
49 GCC's assert.h, which may not be compatible with the host compiler. */
54 # define assert(e) do { if (! (e)) abort (); } while (0)
57 /* Decide whether we want to emit frame unwind information for the current
63 return (write_symbols == DWARF2_DEBUG
64 #ifdef DWARF2_FRAME_INFO
67 #ifdef DWARF2_UNWIND_INFO
68 || (flag_exceptions && ! exceptions_via_longjmp)
73 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
75 /* How to start an assembler comment. */
76 #ifndef ASM_COMMENT_START
77 #define ASM_COMMENT_START ";#"
80 typedef struct dw_cfi_struct *dw_cfi_ref;
81 typedef struct dw_fde_struct *dw_fde_ref;
82 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
84 /* Call frames are described using a sequence of Call Frame
85 Information instructions. The register number, offset
86 and address fields are provided as possible operands;
87 their use is selected by the opcode field. */
89 typedef union dw_cfi_oprnd_struct
91 unsigned long dw_cfi_reg_num;
92 long int dw_cfi_offset;
97 typedef struct dw_cfi_struct
99 dw_cfi_ref dw_cfi_next;
100 enum dwarf_call_frame_info dw_cfi_opc;
101 dw_cfi_oprnd dw_cfi_oprnd1;
102 dw_cfi_oprnd dw_cfi_oprnd2;
106 /* All call frame descriptions (FDE's) in the GCC generated DWARF
107 refer to a single Common Information Entry (CIE), defined at
108 the beginning of the .debug_frame section. This used of a single
109 CIE obviates the need to keep track of multiple CIE's
110 in the DWARF generation routines below. */
112 typedef struct dw_fde_struct
115 char *dw_fde_current_label;
117 dw_cfi_ref dw_fde_cfi;
121 /* Maximum size (in bytes) of an artificially generated label. */
122 #define MAX_ARTIFICIAL_LABEL_BYTES 30
124 /* Make sure we know the sizes of the various types dwarf can describe. These
125 are only defaults. If the sizes are different for your target, you should
126 override these values by defining the appropriate symbols in your tm.h
129 #ifndef CHAR_TYPE_SIZE
130 #define CHAR_TYPE_SIZE BITS_PER_UNIT
133 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
136 /* The size in bytes of a DWARF field indicating an offset or length
137 relative to a debug info section, specified to be 4 bytes in the DWARF-2
138 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
140 #ifndef DWARF_OFFSET_SIZE
141 #define DWARF_OFFSET_SIZE 4
144 #define DWARF_VERSION 2
146 /* Round SIZE up to the nearest BOUNDARY. */
147 #define DWARF_ROUND(SIZE,BOUNDARY) \
148 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
150 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
151 #ifdef STACK_GROWS_DOWNWARD
152 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
154 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
157 /* A pointer to the base of a table that contains frame description
158 information for each routine. */
159 static dw_fde_ref fde_table;
161 /* Number of elements currently allocated for fde_table. */
162 static unsigned fde_table_allocated;
164 /* Number of elements in fde_table currently in use. */
165 static unsigned fde_table_in_use;
167 /* Size (in elements) of increments by which we may expand the
169 #define FDE_TABLE_INCREMENT 256
171 /* A list of call frame insns for the CIE. */
172 static dw_cfi_ref cie_cfi_head;
174 /* The number of the current function definition for which debugging
175 information is being generated. These numbers range from 1 up to the
176 maximum number of function definitions contained within the current
177 compilation unit. These numbers are used to create unique label id's
178 unique to each function definition. */
179 static unsigned current_funcdef_number = 0;
181 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
182 attribute that accelerates the lookup of the FDE associated
183 with the subprogram. This variable holds the table index of the FDE
184 associated with the current function (body) definition. */
185 static unsigned current_funcdef_fde;
187 /* Forward declarations for functions defined in this file. */
189 static char *stripattributes PROTO((const char *));
190 static const char *dwarf_cfi_name PROTO((unsigned));
191 static dw_cfi_ref new_cfi PROTO((void));
192 static void add_cfi PROTO((dw_cfi_ref *, dw_cfi_ref));
193 static unsigned long size_of_uleb128 PROTO((unsigned long));
194 static unsigned long size_of_sleb128 PROTO((long));
195 static void output_uleb128 PROTO((unsigned long));
196 static void output_sleb128 PROTO((long));
197 static void add_fde_cfi PROTO((char *, dw_cfi_ref));
198 static void lookup_cfa_1 PROTO((dw_cfi_ref, unsigned long *,
200 static void lookup_cfa PROTO((unsigned long *, long *));
201 static void reg_save PROTO((char *, unsigned, unsigned,
203 static void initial_return_save PROTO((rtx));
204 static void output_cfi PROTO((dw_cfi_ref, dw_fde_ref));
205 static void output_call_frame_info PROTO((int));
206 static unsigned reg_number PROTO((rtx));
207 static void dwarf2out_stack_adjust PROTO((rtx));
208 static void dwarf2out_frame_debug_expr PROTO((rtx, char *));
210 /* Definitions of defaults for assembler-dependent names of various
211 pseudo-ops and section names.
212 Theses may be overridden in the tm.h file (if necessary) for a particular
215 #ifdef OBJECT_FORMAT_ELF
216 #ifndef UNALIGNED_SHORT_ASM_OP
217 #define UNALIGNED_SHORT_ASM_OP ".2byte"
219 #ifndef UNALIGNED_INT_ASM_OP
220 #define UNALIGNED_INT_ASM_OP ".4byte"
222 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
223 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
225 #endif /* OBJECT_FORMAT_ELF */
228 #define ASM_BYTE_OP ".byte"
231 /* Data and reference forms for relocatable data. */
232 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
233 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
235 /* Pseudo-op for defining a new section. */
236 #ifndef SECTION_ASM_OP
237 #define SECTION_ASM_OP ".section"
240 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
241 print the SECTION_ASM_OP and the section name. The default here works for
242 almost all svr4 assemblers, except for the sparc, where the section name
243 must be enclosed in double quotes. (See sparcv4.h). */
244 #ifndef SECTION_FORMAT
245 #ifdef PUSHSECTION_FORMAT
246 #define SECTION_FORMAT PUSHSECTION_FORMAT
248 #define SECTION_FORMAT "\t%s\t%s\n"
252 #ifndef FRAME_SECTION
253 #define FRAME_SECTION ".debug_frame"
256 #ifndef FUNC_BEGIN_LABEL
257 #define FUNC_BEGIN_LABEL "LFB"
259 #ifndef FUNC_END_LABEL
260 #define FUNC_END_LABEL "LFE"
262 #define CIE_AFTER_SIZE_LABEL "LSCIE"
263 #define CIE_END_LABEL "LECIE"
264 #define CIE_LENGTH_LABEL "LLCIE"
265 #define FDE_AFTER_SIZE_LABEL "LSFDE"
266 #define FDE_END_LABEL "LEFDE"
267 #define FDE_LENGTH_LABEL "LLFDE"
269 /* Definitions of defaults for various types of primitive assembly language
270 output operations. These may be overridden from within the tm.h file,
271 but typically, that is unnecessary. */
273 #ifndef ASM_OUTPUT_SECTION
274 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
275 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
278 #ifndef ASM_OUTPUT_DWARF_DATA1
279 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
280 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
283 #ifndef ASM_OUTPUT_DWARF_DELTA1
284 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
285 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
286 assemble_name (FILE, LABEL1); \
287 fprintf (FILE, "-"); \
288 assemble_name (FILE, LABEL2); \
292 #ifdef UNALIGNED_INT_ASM_OP
294 #ifndef UNALIGNED_OFFSET_ASM_OP
295 #define UNALIGNED_OFFSET_ASM_OP \
296 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
299 #ifndef UNALIGNED_WORD_ASM_OP
300 #define UNALIGNED_WORD_ASM_OP \
301 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
304 #ifndef ASM_OUTPUT_DWARF_DELTA2
305 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
306 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
307 assemble_name (FILE, LABEL1); \
308 fprintf (FILE, "-"); \
309 assemble_name (FILE, LABEL2); \
313 #ifndef ASM_OUTPUT_DWARF_DELTA4
314 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
315 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
316 assemble_name (FILE, LABEL1); \
317 fprintf (FILE, "-"); \
318 assemble_name (FILE, LABEL2); \
322 #ifndef ASM_OUTPUT_DWARF_DELTA
323 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
324 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
325 assemble_name (FILE, LABEL1); \
326 fprintf (FILE, "-"); \
327 assemble_name (FILE, LABEL2); \
331 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
332 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
333 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
334 assemble_name (FILE, LABEL1); \
335 fprintf (FILE, "-"); \
336 assemble_name (FILE, LABEL2); \
340 #ifndef ASM_OUTPUT_DWARF_ADDR
341 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
342 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
343 assemble_name (FILE, LABEL); \
347 /* ??? This macro takes an RTX in dwarfout.c and a string in dwarf2out.c.
348 We resolve the conflict by creating a new macro ASM_OUTPUT_DWARF2_ADDR_CONST
349 for ports that want to support both DWARF1 and DWARF2. This needs a better
350 solution. See also the comments in sparc/sp64-elf.h. */
351 #ifdef ASM_OUTPUT_DWARF2_ADDR_CONST
352 #undef ASM_OUTPUT_DWARF_ADDR_CONST
353 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
354 ASM_OUTPUT_DWARF2_ADDR_CONST (FILE, ADDR)
357 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
358 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
359 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
362 #ifndef ASM_OUTPUT_DWARF_OFFSET4
363 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
364 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
365 assemble_name (FILE, LABEL); \
369 #ifndef ASM_OUTPUT_DWARF_OFFSET
370 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
371 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
372 assemble_name (FILE, LABEL); \
376 #ifndef ASM_OUTPUT_DWARF_DATA2
377 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
378 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
381 #ifndef ASM_OUTPUT_DWARF_DATA4
382 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
383 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
386 #ifndef ASM_OUTPUT_DWARF_DATA
387 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
388 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
389 (unsigned long) (VALUE))
392 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
393 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
394 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
395 (unsigned long) (VALUE))
398 #ifndef ASM_OUTPUT_DWARF_DATA8
399 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
401 if (WORDS_BIG_ENDIAN) \
403 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
404 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
408 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
409 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
414 #else /* UNALIGNED_INT_ASM_OP */
416 /* We don't have unaligned support, let's hope the normal output works for
419 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
420 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
422 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
423 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
425 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
426 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
428 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
429 assemble_integer (gen_rtx_MINUS (HImode, \
430 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
431 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
434 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
435 assemble_integer (gen_rtx_MINUS (SImode, \
436 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
437 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
440 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
441 assemble_integer (gen_rtx_MINUS (Pmode, \
442 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
443 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
446 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
447 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
449 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
450 assemble_integer (GEN_INT (VALUE), 4, 1)
452 #endif /* UNALIGNED_INT_ASM_OP */
455 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
456 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
458 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
459 assemble_name (FILE, SY); \
461 assemble_name (FILE, HI); \
463 assemble_name (FILE, LO); \
466 #endif /* SET_ASM_OP */
468 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
469 newline is produced. When flag_debug_asm is asserted, we add commentary
470 at the end of the line, so we must avoid output of a newline here. */
471 #ifndef ASM_OUTPUT_DWARF_STRING
472 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
474 register int slen = strlen(P); \
475 register const char *p = (P); \
477 fprintf (FILE, "\t.ascii \""); \
478 for (i = 0; i < slen; i++) \
480 register int c = p[i]; \
481 if (c == '\"' || c == '\\') \
487 fprintf (FILE, "\\%o", c); \
490 fprintf (FILE, "\\0\""); \
495 /* The DWARF 2 CFA column which tracks the return address. Normally this
496 is the column for PC, or the first column after all of the hard
498 #ifndef DWARF_FRAME_RETURN_COLUMN
500 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
502 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
506 /* The mapping from gcc register number to DWARF 2 CFA column number. By
507 default, we just provide columns for all registers. */
508 #ifndef DWARF_FRAME_REGNUM
509 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
512 /* Hook used by __throw. */
515 expand_builtin_dwarf_fp_regnum ()
517 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
520 /* The offset from the incoming value of %sp to the top of the stack frame
521 for the current function. */
522 #ifndef INCOMING_FRAME_SP_OFFSET
523 #define INCOMING_FRAME_SP_OFFSET 0
526 /* Return a pointer to a copy of the section string name S with all
527 attributes stripped off, and an asterisk prepended (for assemble_name). */
533 char *stripped = xmalloc (strlen (s) + 2);
538 while (*s && *s != ',')
545 /* Return the register number described by a given RTL node. */
551 register unsigned regno = REGNO (rtl);
553 if (regno >= FIRST_PSEUDO_REGISTER)
555 warning ("internal regno botch: regno = %d\n", regno);
559 regno = DBX_REGISTER_NUMBER (regno);
563 struct reg_size_range
570 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
571 We do this in kind of a roundabout way, by building up a list of
572 register size ranges and seeing where our register falls in one of those
573 ranges. We need to do it this way because REG_TREE is not a constant,
574 and the target macros were not designed to make this task easy. */
577 expand_builtin_dwarf_reg_size (reg_tree, target)
581 enum machine_mode mode;
583 struct reg_size_range ranges[5];
590 for (; i < FIRST_PSEUDO_REGISTER; ++i)
592 /* The return address is out of order on the MIPS, and we don't use
593 copy_reg for it anyway, so we don't care here how large it is. */
594 if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
597 mode = reg_raw_mode[i];
599 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
600 to use the same size as word_mode, since that reduces the number
601 of ranges we need. It should not matter, since the result should
602 never be used for a condition code register anyways. */
603 if (GET_MODE_CLASS (mode) == MODE_CC)
606 size = GET_MODE_SIZE (mode);
608 /* If this register is not valid in the specified mode and
609 we have a previous size, use that for the size of this
610 register to avoid making junk tiny ranges. */
611 if (! HARD_REGNO_MODE_OK (i, mode) && last_size != -1)
614 if (size != last_size)
616 ranges[n_ranges].beg = i;
617 ranges[n_ranges].size = last_size = size;
622 ranges[n_ranges-1].end = i;
625 /* The usual case: fp regs surrounded by general regs. */
626 if (n_ranges == 3 && ranges[0].size == ranges[2].size)
628 if ((DWARF_FRAME_REGNUM (ranges[1].end)
629 - DWARF_FRAME_REGNUM (ranges[1].beg))
630 != ranges[1].end - ranges[1].beg)
632 t = fold (build (GE_EXPR, integer_type_node, reg_tree,
633 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].beg), 0)));
634 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
635 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].end), 0)));
636 t = fold (build (TRUTH_ANDIF_EXPR, integer_type_node, t, t2));
637 t = fold (build (COND_EXPR, integer_type_node, t,
638 build_int_2 (ranges[1].size, 0),
639 build_int_2 (ranges[0].size, 0)));
643 /* Initialize last_end to be larger than any possible
644 DWARF_FRAME_REGNUM. */
645 int last_end = 0x7fffffff;
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)
1041 unsigned int reg = (unsigned int) -1;
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 /* A temporary register used in adjusting SP or setting up the store_reg. */
1191 static unsigned cfa_temp_reg;
1193 /* A temporary value used in adjusting SP or setting up the store_reg. */
1194 static long cfa_temp_value;
1196 /* Record call frame debugging information for an expression, which either
1197 sets SP or FP (adjusting how we calculate the frame address) or saves a
1198 register to the stack. */
1201 dwarf2out_frame_debug_expr (expr, label)
1208 /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of
1209 the PARALLEL independantly. The first element is always processed if
1210 it is a SET. This is for backward compatability. Other elements
1211 are processed only if they are SETs and the RTX_FRAME_RELATED_P
1212 flag is set in them. */
1214 if (GET_CODE (expr) == PARALLEL)
1217 int limit = XVECLEN (expr, 0);
1219 for (par_index = 0; par_index < limit; par_index++)
1221 rtx x = XVECEXP (expr, 0, par_index);
1223 if (GET_CODE (x) == SET &&
1224 (RTX_FRAME_RELATED_P (x) || par_index == 0))
1225 dwarf2out_frame_debug_expr (x, label);
1230 if (GET_CODE (expr) != SET)
1233 src = SET_SRC (expr);
1234 dest = SET_DEST (expr);
1236 switch (GET_CODE (dest))
1239 /* Update the CFA rule wrt SP or FP. Make sure src is
1240 relative to the current CFA register. */
1241 switch (GET_CODE (src))
1243 /* Setting FP from SP. */
1245 if (cfa_reg != (unsigned) REGNO (src))
1247 if (REGNO (dest) != STACK_POINTER_REGNUM
1248 && !(frame_pointer_needed
1249 && REGNO (dest) == HARD_FRAME_POINTER_REGNUM))
1251 cfa_reg = REGNO (dest);
1256 if (dest == stack_pointer_rtx)
1259 switch (GET_CODE (XEXP (src, 1)))
1262 offset = INTVAL (XEXP (src, 1));
1265 if ((unsigned) REGNO (XEXP (src, 1)) != cfa_temp_reg)
1267 offset = cfa_temp_value;
1273 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1275 /* Restoring SP from FP in the epilogue. */
1276 if (cfa_reg != (unsigned) HARD_FRAME_POINTER_REGNUM)
1278 cfa_reg = STACK_POINTER_REGNUM;
1280 else if (XEXP (src, 0) != stack_pointer_rtx)
1283 if (GET_CODE (src) == PLUS)
1285 if (cfa_reg == STACK_POINTER_REGNUM)
1286 cfa_offset += offset;
1287 if (cfa_store_reg == STACK_POINTER_REGNUM)
1288 cfa_store_offset += offset;
1290 else if (dest == hard_frame_pointer_rtx)
1292 /* Either setting the FP from an offset of the SP,
1293 or adjusting the FP */
1294 if (! frame_pointer_needed
1295 || REGNO (dest) != HARD_FRAME_POINTER_REGNUM)
1298 if (XEXP (src, 0) == stack_pointer_rtx
1299 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1301 if (cfa_reg != STACK_POINTER_REGNUM)
1303 offset = INTVAL (XEXP (src, 1));
1304 if (GET_CODE (src) == PLUS)
1306 cfa_offset += offset;
1307 cfa_reg = HARD_FRAME_POINTER_REGNUM;
1309 else if (XEXP (src, 0) == hard_frame_pointer_rtx
1310 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1312 if (cfa_reg != (unsigned) HARD_FRAME_POINTER_REGNUM)
1314 offset = INTVAL (XEXP (src, 1));
1315 if (GET_CODE (src) == PLUS)
1317 cfa_offset += offset;
1325 if (GET_CODE (src) != PLUS
1326 || XEXP (src, 1) != stack_pointer_rtx)
1328 if (GET_CODE (XEXP (src, 0)) != REG
1329 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg)
1331 if (cfa_reg != STACK_POINTER_REGNUM)
1333 cfa_store_reg = REGNO (dest);
1334 cfa_store_offset = cfa_offset - cfa_temp_value;
1339 cfa_temp_reg = REGNO (dest);
1340 cfa_temp_value = INTVAL (src);
1344 if (GET_CODE (XEXP (src, 0)) != REG
1345 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg
1346 || (unsigned) REGNO (dest) != cfa_temp_reg
1347 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1349 cfa_temp_value |= INTVAL (XEXP (src, 1));
1355 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1359 /* Saving a register to the stack. Make sure dest is relative to the
1361 if (GET_CODE (src) != REG)
1363 switch (GET_CODE (XEXP (dest, 0)))
1368 offset = GET_MODE_SIZE (GET_MODE (dest));
1369 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1372 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1373 || cfa_store_reg != STACK_POINTER_REGNUM)
1375 cfa_store_offset += offset;
1376 if (cfa_reg == STACK_POINTER_REGNUM)
1377 cfa_offset = cfa_store_offset;
1379 offset = -cfa_store_offset;
1382 /* With an offset. */
1385 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1386 if (GET_CODE (XEXP (dest, 0)) == MINUS)
1389 if (cfa_store_reg != (unsigned) REGNO (XEXP (XEXP (dest, 0), 0)))
1391 offset -= cfa_store_offset;
1394 /* Without an offset. */
1396 if (cfa_store_reg != (unsigned) REGNO (XEXP (dest, 0)))
1398 offset = -cfa_store_offset;
1404 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1405 dwarf2out_reg_save (label, REGNO (src), offset);
1414 /* Record call frame debugging information for INSN, which either
1415 sets SP or FP (adjusting how we calculate the frame address) or saves a
1416 register to the stack. If INSN is NULL_RTX, initialize our state. */
1419 dwarf2out_frame_debug (insn)
1425 if (insn == NULL_RTX)
1427 /* Set up state for generating call frame debug info. */
1428 lookup_cfa (&cfa_reg, &cfa_offset);
1429 if (cfa_reg != DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1431 cfa_reg = STACK_POINTER_REGNUM;
1432 cfa_store_reg = cfa_reg;
1433 cfa_store_offset = cfa_offset;
1439 if (! RTX_FRAME_RELATED_P (insn))
1441 dwarf2out_stack_adjust (insn);
1445 label = dwarf2out_cfi_label ();
1447 src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX);
1449 insn = XEXP (src, 0);
1451 insn = PATTERN (insn);
1453 dwarf2out_frame_debug_expr (insn, label);
1456 /* Return the size of an unsigned LEB128 quantity. */
1458 static inline unsigned long
1459 size_of_uleb128 (value)
1460 register unsigned long value;
1462 register unsigned long size = 0;
1463 register unsigned byte;
1467 byte = (value & 0x7f);
1476 /* Return the size of a signed LEB128 quantity. */
1478 static inline unsigned long
1479 size_of_sleb128 (value)
1480 register long value;
1482 register unsigned long size = 0;
1483 register unsigned byte;
1487 byte = (value & 0x7f);
1491 while (!(((value == 0) && ((byte & 0x40) == 0))
1492 || ((value == -1) && ((byte & 0x40) != 0))));
1497 /* Output an unsigned LEB128 quantity. */
1500 output_uleb128 (value)
1501 register unsigned long value;
1503 unsigned long save_value = value;
1505 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1508 register unsigned byte = (value & 0x7f);
1511 /* More bytes to follow. */
1514 fprintf (asm_out_file, "0x%x", byte);
1516 fprintf (asm_out_file, ",");
1521 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1524 /* Output an signed LEB128 quantity. */
1527 output_sleb128 (value)
1528 register long value;
1531 register unsigned byte;
1532 long save_value = value;
1534 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1537 byte = (value & 0x7f);
1538 /* arithmetic shift */
1540 more = !((((value == 0) && ((byte & 0x40) == 0))
1541 || ((value == -1) && ((byte & 0x40) != 0))));
1545 fprintf (asm_out_file, "0x%x", byte);
1547 fprintf (asm_out_file, ",");
1552 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1555 /* Output a Call Frame Information opcode and its operand(s). */
1558 output_cfi (cfi, fde)
1559 register dw_cfi_ref cfi;
1560 register dw_fde_ref fde;
1562 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1564 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1566 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1568 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1569 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1570 fputc ('\n', asm_out_file);
1573 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1575 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1577 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1579 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1580 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1582 fputc ('\n', asm_out_file);
1583 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1584 fputc ('\n', asm_out_file);
1586 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1588 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1590 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1592 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1593 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1595 fputc ('\n', asm_out_file);
1599 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1601 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1602 dwarf_cfi_name (cfi->dw_cfi_opc));
1604 fputc ('\n', asm_out_file);
1605 switch (cfi->dw_cfi_opc)
1607 case DW_CFA_set_loc:
1608 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1609 fputc ('\n', asm_out_file);
1611 case DW_CFA_advance_loc1:
1612 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1613 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1614 fde->dw_fde_current_label);
1615 fputc ('\n', asm_out_file);
1616 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1618 case DW_CFA_advance_loc2:
1619 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1620 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1621 fde->dw_fde_current_label);
1622 fputc ('\n', asm_out_file);
1623 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1625 case DW_CFA_advance_loc4:
1626 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1627 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1628 fde->dw_fde_current_label);
1629 fputc ('\n', asm_out_file);
1630 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1632 #ifdef MIPS_DEBUGGING_INFO
1633 case DW_CFA_MIPS_advance_loc8:
1634 /* TODO: not currently implemented. */
1638 case DW_CFA_offset_extended:
1639 case DW_CFA_def_cfa:
1640 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1641 fputc ('\n', asm_out_file);
1642 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1643 fputc ('\n', asm_out_file);
1645 case DW_CFA_restore_extended:
1646 case DW_CFA_undefined:
1647 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1648 fputc ('\n', asm_out_file);
1650 case DW_CFA_same_value:
1651 case DW_CFA_def_cfa_register:
1652 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1653 fputc ('\n', asm_out_file);
1655 case DW_CFA_register:
1656 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1657 fputc ('\n', asm_out_file);
1658 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1659 fputc ('\n', asm_out_file);
1661 case DW_CFA_def_cfa_offset:
1662 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1663 fputc ('\n', asm_out_file);
1665 case DW_CFA_GNU_window_save:
1667 case DW_CFA_GNU_args_size:
1668 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1669 fputc ('\n', asm_out_file);
1677 /* Output the call frame information used to used to record information
1678 that relates to calculating the frame pointer, and records the
1679 location of saved registers. */
1682 output_call_frame_info (for_eh)
1685 register unsigned long i;
1686 register dw_fde_ref fde;
1687 register dw_cfi_ref cfi;
1688 char l1[20], l2[20];
1689 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1693 /* Do we want to include a pointer to the exception table? */
1694 int eh_ptr = for_eh && exception_table_p ();
1696 fputc ('\n', asm_out_file);
1698 /* We're going to be generating comments, so turn on app. */
1704 #ifdef EH_FRAME_SECTION
1705 EH_FRAME_SECTION ();
1707 tree label = get_file_function_name ('F');
1709 force_data_section ();
1710 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1711 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1712 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1714 assemble_label ("__FRAME_BEGIN__");
1717 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1719 /* Output the CIE. */
1720 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1721 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1722 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1723 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1725 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1727 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1730 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1732 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1735 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1738 fputc ('\n', asm_out_file);
1739 ASM_OUTPUT_LABEL (asm_out_file, l1);
1742 /* Now that the CIE pointer is PC-relative for EH,
1743 use 0 to identify the CIE. */
1744 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1746 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1749 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1751 fputc ('\n', asm_out_file);
1752 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1754 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1755 fputc ('\n', asm_out_file);
1758 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1760 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1762 fputc ('\n', asm_out_file);
1765 /* The CIE contains a pointer to the exception region info for the
1766 frame. Make the augmentation string three bytes (including the
1767 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1768 can't handle unaligned relocs. */
1771 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1772 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1776 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1778 fputc ('\n', asm_out_file);
1780 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1782 fprintf (asm_out_file, "\t%s pointer to exception region info",
1787 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1789 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1793 fputc ('\n', asm_out_file);
1796 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1798 fputc ('\n', asm_out_file);
1799 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1801 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1803 fputc ('\n', asm_out_file);
1804 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1806 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1808 fputc ('\n', asm_out_file);
1810 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1811 output_cfi (cfi, NULL);
1813 /* Pad the CIE out to an address sized boundary. */
1814 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1815 ASM_OUTPUT_LABEL (asm_out_file, l2);
1816 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1817 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1819 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1820 fputc ('\n', asm_out_file);
1823 /* Loop through all of the FDE's. */
1824 for (i = 0; i < fde_table_in_use; ++i)
1826 fde = &fde_table[i];
1828 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1829 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1830 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1831 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1833 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1835 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1838 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1840 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1843 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1844 fputc ('\n', asm_out_file);
1845 ASM_OUTPUT_LABEL (asm_out_file, l1);
1847 /* ??? This always emits a 4 byte offset when for_eh is true, but it
1848 emits a target dependent sized offset when for_eh is not true.
1849 This inconsistency may confuse gdb. The only case where we need a
1850 non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI
1851 compatibility if we emit a 4 byte offset. We need a 4 byte offset
1852 though in order to be compatible with the dwarf_fde struct in frame.c.
1853 If the for_eh case is changed, then the struct in frame.c has
1854 to be adjusted appropriately. */
1856 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l1, "__FRAME_BEGIN__");
1858 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1860 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1862 fputc ('\n', asm_out_file);
1863 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1865 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1867 fputc ('\n', asm_out_file);
1868 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1869 fde->dw_fde_end, fde->dw_fde_begin);
1871 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1873 fputc ('\n', asm_out_file);
1875 /* Loop through the Call Frame Instructions associated with
1877 fde->dw_fde_current_label = fde->dw_fde_begin;
1878 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1879 output_cfi (cfi, fde);
1881 /* Pad the FDE out to an address sized boundary. */
1882 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1883 ASM_OUTPUT_LABEL (asm_out_file, l2);
1884 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1885 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1887 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1888 fputc ('\n', asm_out_file);
1891 #ifndef EH_FRAME_SECTION
1894 /* Emit terminating zero for table. */
1895 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1896 fputc ('\n', asm_out_file);
1899 #ifdef MIPS_DEBUGGING_INFO
1900 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1901 get a value of 0. Putting .align 0 after the label fixes it. */
1902 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1905 /* Turn off app to make assembly quicker. */
1910 /* Output a marker (i.e. a label) for the beginning of a function, before
1914 dwarf2out_begin_prologue ()
1916 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1917 register dw_fde_ref fde;
1919 ++current_funcdef_number;
1921 function_section (current_function_decl);
1922 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1923 current_funcdef_number);
1924 ASM_OUTPUT_LABEL (asm_out_file, label);
1926 /* Expand the fde table if necessary. */
1927 if (fde_table_in_use == fde_table_allocated)
1929 fde_table_allocated += FDE_TABLE_INCREMENT;
1931 = (dw_fde_ref) xrealloc (fde_table,
1932 fde_table_allocated * sizeof (dw_fde_node));
1935 /* Record the FDE associated with this function. */
1936 current_funcdef_fde = fde_table_in_use;
1938 /* Add the new FDE at the end of the fde_table. */
1939 fde = &fde_table[fde_table_in_use++];
1940 fde->dw_fde_begin = xstrdup (label);
1941 fde->dw_fde_current_label = NULL;
1942 fde->dw_fde_end = NULL;
1943 fde->dw_fde_cfi = NULL;
1945 args_size = old_args_size = 0;
1948 /* Output a marker (i.e. a label) for the absolute end of the generated code
1949 for a function definition. This gets called *after* the epilogue code has
1953 dwarf2out_end_epilogue ()
1956 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1958 /* Output a label to mark the endpoint of the code generated for this
1960 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
1961 ASM_OUTPUT_LABEL (asm_out_file, label);
1962 fde = &fde_table[fde_table_in_use - 1];
1963 fde->dw_fde_end = xstrdup (label);
1967 dwarf2out_frame_init ()
1969 /* Allocate the initial hunk of the fde_table. */
1970 fde_table = (dw_fde_ref) xcalloc (FDE_TABLE_INCREMENT, sizeof (dw_fde_node));
1971 fde_table_allocated = FDE_TABLE_INCREMENT;
1972 fde_table_in_use = 0;
1974 /* Generate the CFA instructions common to all FDE's. Do it now for the
1975 sake of lookup_cfa. */
1977 #ifdef DWARF2_UNWIND_INFO
1978 /* On entry, the Canonical Frame Address is at SP. */
1979 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
1980 initial_return_save (INCOMING_RETURN_ADDR_RTX);
1985 dwarf2out_frame_finish ()
1987 /* Output call frame information. */
1988 #ifdef MIPS_DEBUGGING_INFO
1989 if (write_symbols == DWARF2_DEBUG)
1990 output_call_frame_info (0);
1991 if (flag_exceptions && ! exceptions_via_longjmp)
1992 output_call_frame_info (1);
1994 if (write_symbols == DWARF2_DEBUG
1995 || (flag_exceptions && ! exceptions_via_longjmp))
1996 output_call_frame_info (1);
2000 #endif /* .debug_frame support */
2002 /* And now, the support for symbolic debugging information. */
2003 #ifdef DWARF2_DEBUGGING_INFO
2005 /* NOTE: In the comments in this file, many references are made to
2006 "Debugging Information Entries". This term is abbreviated as `DIE'
2007 throughout the remainder of this file. */
2009 /* An internal representation of the DWARF output is built, and then
2010 walked to generate the DWARF debugging info. The walk of the internal
2011 representation is done after the entire program has been compiled.
2012 The types below are used to describe the internal representation. */
2014 /* Each DIE may have a series of attribute/value pairs. Values
2015 can take on several forms. The forms that are used in this
2016 implementation are listed below. */
2023 dw_val_class_unsigned_const,
2024 dw_val_class_long_long,
2027 dw_val_class_die_ref,
2028 dw_val_class_fde_ref,
2029 dw_val_class_lbl_id,
2030 dw_val_class_lbl_offset,
2035 /* Various DIE's use offsets relative to the beginning of the
2036 .debug_info section to refer to each other. */
2038 typedef long int dw_offset;
2040 /* Define typedefs here to avoid circular dependencies. */
2042 typedef struct die_struct *dw_die_ref;
2043 typedef struct dw_attr_struct *dw_attr_ref;
2044 typedef struct dw_val_struct *dw_val_ref;
2045 typedef struct dw_line_info_struct *dw_line_info_ref;
2046 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2047 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2048 typedef struct pubname_struct *pubname_ref;
2049 typedef dw_die_ref *arange_ref;
2051 /* Describe a double word constant value. */
2053 typedef struct dw_long_long_struct
2060 /* Describe a floating point constant value. */
2062 typedef struct dw_fp_struct
2069 /* Each entry in the line_info_table maintains the file and
2070 line number associated with the label generated for that
2071 entry. The label gives the PC value associated with
2072 the line number entry. */
2074 typedef struct dw_line_info_struct
2076 unsigned long dw_file_num;
2077 unsigned long dw_line_num;
2081 /* Line information for functions in separate sections; each one gets its
2083 typedef struct dw_separate_line_info_struct
2085 unsigned long dw_file_num;
2086 unsigned long dw_line_num;
2087 unsigned long function;
2089 dw_separate_line_info_entry;
2091 /* The dw_val_node describes an attribute's value, as it is
2092 represented internally. */
2094 typedef struct dw_val_struct
2096 dw_val_class val_class;
2100 dw_loc_descr_ref val_loc;
2102 long unsigned val_unsigned;
2103 dw_long_long_const val_long_long;
2104 dw_float_const val_float;
2105 dw_die_ref val_die_ref;
2106 unsigned val_fde_index;
2109 unsigned char val_flag;
2115 /* Locations in memory are described using a sequence of stack machine
2118 typedef struct dw_loc_descr_struct
2120 dw_loc_descr_ref dw_loc_next;
2121 enum dwarf_location_atom dw_loc_opc;
2122 dw_val_node dw_loc_oprnd1;
2123 dw_val_node dw_loc_oprnd2;
2127 /* Each DIE attribute has a field specifying the attribute kind,
2128 a link to the next attribute in the chain, and an attribute value.
2129 Attributes are typically linked below the DIE they modify. */
2131 typedef struct dw_attr_struct
2133 enum dwarf_attribute dw_attr;
2134 dw_attr_ref dw_attr_next;
2135 dw_val_node dw_attr_val;
2139 /* The Debugging Information Entry (DIE) structure */
2141 typedef struct die_struct
2143 enum dwarf_tag die_tag;
2144 dw_attr_ref die_attr;
2145 dw_attr_ref die_attr_last;
2146 dw_die_ref die_parent;
2147 dw_die_ref die_child;
2148 dw_die_ref die_child_last;
2150 dw_offset die_offset;
2151 unsigned long die_abbrev;
2155 /* The pubname structure */
2157 typedef struct pubname_struct
2164 /* The limbo die list structure. */
2165 typedef struct limbo_die_struct
2168 struct limbo_die_struct *next;
2172 /* How to start an assembler comment. */
2173 #ifndef ASM_COMMENT_START
2174 #define ASM_COMMENT_START ";#"
2177 /* Define a macro which returns non-zero for a TYPE_DECL which was
2178 implicitly generated for a tagged type.
2180 Note that unlike the gcc front end (which generates a NULL named
2181 TYPE_DECL node for each complete tagged type, each array type, and
2182 each function type node created) the g++ front end generates a
2183 _named_ TYPE_DECL node for each tagged type node created.
2184 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2185 generate a DW_TAG_typedef DIE for them. */
2187 #define TYPE_DECL_IS_STUB(decl) \
2188 (DECL_NAME (decl) == NULL_TREE \
2189 || (DECL_ARTIFICIAL (decl) \
2190 && is_tagged_type (TREE_TYPE (decl)) \
2191 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2192 /* This is necessary for stub decls that \
2193 appear in nested inline functions. */ \
2194 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2195 && (decl_ultimate_origin (decl) \
2196 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2198 /* Information concerning the compilation unit's programming
2199 language, and compiler version. */
2201 extern int flag_traditional;
2202 extern char *version_string;
2204 /* Fixed size portion of the DWARF compilation unit header. */
2205 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2207 /* Fixed size portion of debugging line information prolog. */
2208 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2210 /* Fixed size portion of public names info. */
2211 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2213 /* Fixed size portion of the address range info. */
2214 #define DWARF_ARANGES_HEADER_SIZE \
2215 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2217 /* The default is to have gcc emit the line number tables. */
2218 #ifndef DWARF2_ASM_LINE_DEBUG_INFO
2219 #define DWARF2_ASM_LINE_DEBUG_INFO 0
2222 /* Define the architecture-dependent minimum instruction length (in bytes).
2223 In this implementation of DWARF, this field is used for information
2224 purposes only. Since GCC generates assembly language, we have
2225 no a priori knowledge of how many instruction bytes are generated
2226 for each source line, and therefore can use only the DW_LNE_set_address
2227 and DW_LNS_fixed_advance_pc line information commands. */
2229 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2230 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2233 /* Minimum line offset in a special line info. opcode.
2234 This value was chosen to give a reasonable range of values. */
2235 #define DWARF_LINE_BASE -10
2237 /* First special line opcde - leave room for the standard opcodes. */
2238 #define DWARF_LINE_OPCODE_BASE 10
2240 /* Range of line offsets in a special line info. opcode. */
2241 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2243 /* Flag that indicates the initial value of the is_stmt_start flag.
2244 In the present implementation, we do not mark any lines as
2245 the beginning of a source statement, because that information
2246 is not made available by the GCC front-end. */
2247 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2249 /* This location is used by calc_die_sizes() to keep track
2250 the offset of each DIE within the .debug_info section. */
2251 static unsigned long next_die_offset;
2253 /* Record the root of the DIE's built for the current compilation unit. */
2254 static dw_die_ref comp_unit_die;
2256 /* A list of DIEs with a NULL parent waiting to be relocated. */
2257 static limbo_die_node *limbo_die_list = 0;
2259 /* Pointer to an array of filenames referenced by this compilation unit. */
2260 static char **file_table;
2262 /* Total number of entries in the table (i.e. array) pointed to by
2263 `file_table'. This is the *total* and includes both used and unused
2265 static unsigned file_table_allocated;
2267 /* Number of entries in the file_table which are actually in use. */
2268 static unsigned file_table_in_use;
2270 /* Size (in elements) of increments by which we may expand the filename
2272 #define FILE_TABLE_INCREMENT 64
2274 /* Local pointer to the name of the main input file. Initialized in
2276 static char *primary_filename;
2278 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2279 which their beginnings are encountered. We output Dwarf debugging info
2280 that refers to the beginnings and ends of the ranges of code for each
2281 lexical block. The labels themselves are generated in final.c, which
2282 assigns numbers to the blocks in the same way. */
2283 static unsigned next_block_number = 2;
2285 /* A pointer to the base of a table of references to DIE's that describe
2286 declarations. The table is indexed by DECL_UID() which is a unique
2287 number identifying each decl. */
2288 static dw_die_ref *decl_die_table;
2290 /* Number of elements currently allocated for the decl_die_table. */
2291 static unsigned decl_die_table_allocated;
2293 /* Number of elements in decl_die_table currently in use. */
2294 static unsigned decl_die_table_in_use;
2296 /* Size (in elements) of increments by which we may expand the
2298 #define DECL_DIE_TABLE_INCREMENT 256
2300 /* Structure used for the decl_scope table. scope is the current declaration
2301 scope, and previous is the entry that is the parent of this scope. This
2302 is usually but not always the immediately preceeding entry. */
2304 typedef struct decl_scope_struct
2311 /* A pointer to the base of a table of references to declaration
2312 scopes. This table is a display which tracks the nesting
2313 of declaration scopes at the current scope and containing
2314 scopes. This table is used to find the proper place to
2315 define type declaration DIE's. */
2316 static decl_scope_node *decl_scope_table;
2318 /* Number of elements currently allocated for the decl_scope_table. */
2319 static int decl_scope_table_allocated;
2321 /* Current level of nesting of declaration scopes. */
2322 static int decl_scope_depth;
2324 /* Size (in elements) of increments by which we may expand the
2325 decl_scope_table. */
2326 #define DECL_SCOPE_TABLE_INCREMENT 64
2328 /* A pointer to the base of a list of references to DIE's that
2329 are uniquely identified by their tag, presence/absence of
2330 children DIE's, and list of attribute/value pairs. */
2331 static dw_die_ref *abbrev_die_table;
2333 /* Number of elements currently allocated for abbrev_die_table. */
2334 static unsigned abbrev_die_table_allocated;
2336 /* Number of elements in type_die_table currently in use. */
2337 static unsigned abbrev_die_table_in_use;
2339 /* Size (in elements) of increments by which we may expand the
2340 abbrev_die_table. */
2341 #define ABBREV_DIE_TABLE_INCREMENT 256
2343 /* A pointer to the base of a table that contains line information
2344 for each source code line in .text in the compilation unit. */
2345 static dw_line_info_ref line_info_table;
2347 /* Number of elements currently allocated for line_info_table. */
2348 static unsigned line_info_table_allocated;
2350 /* Number of elements in separate_line_info_table currently in use. */
2351 static unsigned separate_line_info_table_in_use;
2353 /* A pointer to the base of a table that contains line information
2354 for each source code line outside of .text in the compilation unit. */
2355 static dw_separate_line_info_ref separate_line_info_table;
2357 /* Number of elements currently allocated for separate_line_info_table. */
2358 static unsigned separate_line_info_table_allocated;
2360 /* Number of elements in line_info_table currently in use. */
2361 static unsigned line_info_table_in_use;
2363 /* Size (in elements) of increments by which we may expand the
2365 #define LINE_INFO_TABLE_INCREMENT 1024
2367 /* A pointer to the base of a table that contains a list of publicly
2368 accessible names. */
2369 static pubname_ref pubname_table;
2371 /* Number of elements currently allocated for pubname_table. */
2372 static unsigned pubname_table_allocated;
2374 /* Number of elements in pubname_table currently in use. */
2375 static unsigned pubname_table_in_use;
2377 /* Size (in elements) of increments by which we may expand the
2379 #define PUBNAME_TABLE_INCREMENT 64
2381 /* A pointer to the base of a table that contains a list of publicly
2382 accessible names. */
2383 static arange_ref arange_table;
2385 /* Number of elements currently allocated for arange_table. */
2386 static unsigned arange_table_allocated;
2388 /* Number of elements in arange_table currently in use. */
2389 static unsigned arange_table_in_use;
2391 /* Size (in elements) of increments by which we may expand the
2393 #define ARANGE_TABLE_INCREMENT 64
2395 /* A pointer to the base of a list of pending types which we haven't
2396 generated DIEs for yet, but which we will have to come back to
2399 static tree *pending_types_list;
2401 /* Number of elements currently allocated for the pending_types_list. */
2402 static unsigned pending_types_allocated;
2404 /* Number of elements of pending_types_list currently in use. */
2405 static unsigned pending_types;
2407 /* Size (in elements) of increments by which we may expand the pending
2408 types list. Actually, a single hunk of space of this size should
2409 be enough for most typical programs. */
2410 #define PENDING_TYPES_INCREMENT 64
2412 /* A pointer to the base of a list of incomplete types which might be
2413 completed at some later time. */
2415 static tree *incomplete_types_list;
2417 /* Number of elements currently allocated for the incomplete_types_list. */
2418 static unsigned incomplete_types_allocated;
2420 /* Number of elements of incomplete_types_list currently in use. */
2421 static unsigned incomplete_types;
2423 /* Size (in elements) of increments by which we may expand the incomplete
2424 types list. Actually, a single hunk of space of this size should
2425 be enough for most typical programs. */
2426 #define INCOMPLETE_TYPES_INCREMENT 64
2428 /* Record whether the function being analyzed contains inlined functions. */
2429 static int current_function_has_inlines;
2430 #if 0 && defined (MIPS_DEBUGGING_INFO)
2431 static int comp_unit_has_inlines;
2434 /* A pointer to the ..._DECL node which we have most recently been working
2435 on. We keep this around just in case something about it looks screwy and
2436 we want to tell the user what the source coordinates for the actual
2438 static tree dwarf_last_decl;
2440 /* Forward declarations for functions defined in this file. */
2442 static void addr_const_to_string PROTO((dyn_string_t, rtx));
2443 static char *addr_to_string PROTO((rtx));
2444 static int is_pseudo_reg PROTO((rtx));
2445 static tree type_main_variant PROTO((tree));
2446 static int is_tagged_type PROTO((tree));
2447 static const char *dwarf_tag_name PROTO((unsigned));
2448 static const char *dwarf_attr_name PROTO((unsigned));
2449 static const char *dwarf_form_name PROTO((unsigned));
2450 static const char *dwarf_stack_op_name PROTO((unsigned));
2452 static const char *dwarf_type_encoding_name PROTO((unsigned));
2454 static tree decl_ultimate_origin PROTO((tree));
2455 static tree block_ultimate_origin PROTO((tree));
2456 static tree decl_class_context PROTO((tree));
2457 static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
2458 static void add_AT_flag PROTO((dw_die_ref,
2459 enum dwarf_attribute,
2461 static void add_AT_int PROTO((dw_die_ref,
2462 enum dwarf_attribute, long));
2463 static void add_AT_unsigned PROTO((dw_die_ref,
2464 enum dwarf_attribute,
2466 static void add_AT_long_long PROTO((dw_die_ref,
2467 enum dwarf_attribute,
2468 unsigned long, unsigned long));
2469 static void add_AT_float PROTO((dw_die_ref,
2470 enum dwarf_attribute,
2472 static void add_AT_string PROTO((dw_die_ref,
2473 enum dwarf_attribute,
2475 static void add_AT_die_ref PROTO((dw_die_ref,
2476 enum dwarf_attribute,
2478 static void add_AT_fde_ref PROTO((dw_die_ref,
2479 enum dwarf_attribute,
2481 static void add_AT_loc PROTO((dw_die_ref,
2482 enum dwarf_attribute,
2484 static void add_AT_addr PROTO((dw_die_ref,
2485 enum dwarf_attribute, char *));
2486 static void add_AT_lbl_id PROTO((dw_die_ref,
2487 enum dwarf_attribute, char *));
2488 static void add_AT_lbl_offset PROTO((dw_die_ref,
2489 enum dwarf_attribute, char *));
2490 static int is_extern_subr_die PROTO((dw_die_ref));
2491 static dw_attr_ref get_AT PROTO((dw_die_ref,
2492 enum dwarf_attribute));
2493 static char *get_AT_low_pc PROTO((dw_die_ref));
2494 static char *get_AT_hi_pc PROTO((dw_die_ref));
2495 static char *get_AT_string PROTO((dw_die_ref,
2496 enum dwarf_attribute));
2497 static int get_AT_flag PROTO((dw_die_ref,
2498 enum dwarf_attribute));
2499 static unsigned get_AT_unsigned PROTO((dw_die_ref,
2500 enum dwarf_attribute));
2501 static int is_c_family PROTO((void));
2502 static int is_fortran PROTO((void));
2503 static void remove_AT PROTO((dw_die_ref,
2504 enum dwarf_attribute));
2505 static void remove_children PROTO((dw_die_ref));
2506 static void add_child_die PROTO((dw_die_ref, dw_die_ref));
2507 static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
2508 static dw_die_ref lookup_type_die PROTO((tree));
2509 static void equate_type_number_to_die PROTO((tree, dw_die_ref));
2510 static dw_die_ref lookup_decl_die PROTO((tree));
2511 static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
2512 static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
2513 unsigned long, unsigned long));
2514 static void add_loc_descr PROTO((dw_loc_descr_ref *,
2516 static void print_spaces PROTO((FILE *));
2517 static void print_die PROTO((dw_die_ref, FILE *));
2518 static void print_dwarf_line_table PROTO((FILE *));
2519 static void add_sibling_attributes PROTO((dw_die_ref));
2520 static void build_abbrev_table PROTO((dw_die_ref));
2521 static unsigned long size_of_string PROTO((char *));
2522 static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
2523 static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
2524 static int constant_size PROTO((long unsigned));
2525 static unsigned long size_of_die PROTO((dw_die_ref));
2526 static void calc_die_sizes PROTO((dw_die_ref));
2527 static unsigned long size_of_line_prolog PROTO((void));
2528 static unsigned long size_of_line_info PROTO((void));
2529 static unsigned long size_of_pubnames PROTO((void));
2530 static unsigned long size_of_aranges PROTO((void));
2531 static enum dwarf_form value_format PROTO((dw_val_ref));
2532 static void output_value_format PROTO((dw_val_ref));
2533 static void output_abbrev_section PROTO((void));
2534 static void output_loc_operands PROTO((dw_loc_descr_ref));
2535 static unsigned long sibling_offset PROTO((dw_die_ref));
2536 static void output_die PROTO((dw_die_ref));
2537 static void output_compilation_unit_header PROTO((void));
2538 static const char *dwarf2_name PROTO((tree, int));
2539 static void add_pubname PROTO((tree, dw_die_ref));
2540 static void output_pubnames PROTO((void));
2541 static void add_arange PROTO((tree, dw_die_ref));
2542 static void output_aranges PROTO((void));
2543 static void output_line_info PROTO((void));
2544 static int is_body_block PROTO((tree));
2545 static dw_die_ref base_type_die PROTO((tree));
2546 static tree root_type PROTO((tree));
2547 static int is_base_type PROTO((tree));
2548 static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
2549 static int type_is_enum PROTO((tree));
2550 static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
2551 static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
2552 static int is_based_loc PROTO((rtx));
2553 static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx, enum machine_mode mode));
2554 static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
2555 static dw_loc_descr_ref loc_descriptor PROTO((rtx));
2556 static unsigned ceiling PROTO((unsigned, unsigned));
2557 static tree field_type PROTO((tree));
2558 static unsigned simple_type_align_in_bits PROTO((tree));
2559 static unsigned simple_type_size_in_bits PROTO((tree));
2560 static unsigned field_byte_offset PROTO((tree));
2561 static void add_AT_location_description PROTO((dw_die_ref,
2562 enum dwarf_attribute, rtx));
2563 static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
2564 static void add_const_value_attribute PROTO((dw_die_ref, rtx));
2565 static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
2566 static void add_name_attribute PROTO((dw_die_ref, const char *));
2567 static void add_bound_info PROTO((dw_die_ref,
2568 enum dwarf_attribute, tree));
2569 static void add_subscript_info PROTO((dw_die_ref, tree));
2570 static void add_byte_size_attribute PROTO((dw_die_ref, tree));
2571 static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
2572 static void add_bit_size_attribute PROTO((dw_die_ref, tree));
2573 static void add_prototyped_attribute PROTO((dw_die_ref, tree));
2574 static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
2575 static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
2576 static void add_src_coords_attributes PROTO((dw_die_ref, tree));
2577 static void add_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
2578 static void push_decl_scope PROTO((tree));
2579 static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
2580 static void pop_decl_scope PROTO((void));
2581 static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
2583 static char *type_tag PROTO((tree));
2584 static tree member_declared_type PROTO((tree));
2586 static char *decl_start_label PROTO((tree));
2588 static void gen_array_type_die PROTO((tree, dw_die_ref));
2589 static void gen_set_type_die PROTO((tree, dw_die_ref));
2591 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2593 static void pend_type PROTO((tree));
2594 static void output_pending_types_for_scope PROTO((dw_die_ref));
2595 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2596 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2597 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2598 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2599 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2600 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2601 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2602 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2603 static void gen_variable_die PROTO((tree, dw_die_ref));
2604 static void gen_label_die PROTO((tree, dw_die_ref));
2605 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2606 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2607 static void gen_field_die PROTO((tree, dw_die_ref));
2608 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2609 static void gen_compile_unit_die PROTO((char *));
2610 static void gen_string_type_die PROTO((tree, dw_die_ref));
2611 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2612 static void gen_member_die PROTO((tree, dw_die_ref));
2613 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2614 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2615 static void gen_typedef_die PROTO((tree, dw_die_ref));
2616 static void gen_type_die PROTO((tree, dw_die_ref));
2617 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2618 static void gen_block_die PROTO((tree, dw_die_ref, int));
2619 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2620 static int is_redundant_typedef PROTO((tree));
2621 static void gen_decl_die PROTO((tree, dw_die_ref));
2622 static unsigned lookup_filename PROTO((const char *));
2623 static void add_incomplete_type PROTO((tree));
2624 static void retry_incomplete_types PROTO((void));
2626 /* Section names used to hold DWARF debugging information. */
2627 #ifndef DEBUG_INFO_SECTION
2628 #define DEBUG_INFO_SECTION ".debug_info"
2630 #ifndef ABBREV_SECTION
2631 #define ABBREV_SECTION ".debug_abbrev"
2633 #ifndef ARANGES_SECTION
2634 #define ARANGES_SECTION ".debug_aranges"
2636 #ifndef DW_MACINFO_SECTION
2637 #define DW_MACINFO_SECTION ".debug_macinfo"
2639 #ifndef DEBUG_LINE_SECTION
2640 #define DEBUG_LINE_SECTION ".debug_line"
2643 #define LOC_SECTION ".debug_loc"
2645 #ifndef PUBNAMES_SECTION
2646 #define PUBNAMES_SECTION ".debug_pubnames"
2649 #define STR_SECTION ".debug_str"
2652 /* Standard ELF section names for compiled code and data. */
2653 #ifndef TEXT_SECTION
2654 #define TEXT_SECTION ".text"
2656 #ifndef DATA_SECTION
2657 #define DATA_SECTION ".data"
2660 #define BSS_SECTION ".bss"
2663 /* Labels we insert at beginning sections we can reference instead of
2664 the section names themselves. */
2666 #ifndef TEXT_SECTION_LABEL
2667 #define TEXT_SECTION_LABEL "Ltext"
2669 #ifndef DEBUG_LINE_SECTION_LABEL
2670 #define DEBUG_LINE_SECTION_LABEL "Ldebug_line"
2672 #ifndef DEBUG_INFO_SECTION_LABEL
2673 #define DEBUG_INFO_SECTION_LABEL "Ldebug_info"
2675 #ifndef ABBREV_SECTION_LABEL
2676 #define ABBREV_SECTION_LABEL "Ldebug_abbrev"
2680 /* Definitions of defaults for formats and names of various special
2681 (artificial) labels which may be generated within this file (when the -g
2682 options is used and DWARF_DEBUGGING_INFO is in effect.
2683 If necessary, these may be overridden from within the tm.h file, but
2684 typically, overriding these defaults is unnecessary. */
2686 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2687 static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2688 static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2689 static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2690 static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2692 #ifndef TEXT_END_LABEL
2693 #define TEXT_END_LABEL "Letext"
2695 #ifndef DATA_END_LABEL
2696 #define DATA_END_LABEL "Ledata"
2698 #ifndef BSS_END_LABEL
2699 #define BSS_END_LABEL "Lebss"
2701 #ifndef INSN_LABEL_FMT
2702 #define INSN_LABEL_FMT "LI%u_"
2704 #ifndef BLOCK_BEGIN_LABEL
2705 #define BLOCK_BEGIN_LABEL "LBB"
2707 #ifndef BLOCK_END_LABEL
2708 #define BLOCK_END_LABEL "LBE"
2710 #ifndef BODY_BEGIN_LABEL
2711 #define BODY_BEGIN_LABEL "Lbb"
2713 #ifndef BODY_END_LABEL
2714 #define BODY_END_LABEL "Lbe"
2716 #ifndef LINE_CODE_LABEL
2717 #define LINE_CODE_LABEL "LM"
2719 #ifndef SEPARATE_LINE_CODE_LABEL
2720 #define SEPARATE_LINE_CODE_LABEL "LSM"
2723 /* Convert a reference to the assembler name of a C-level name. This
2724 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2725 a string rather than writing to a file. */
2726 #ifndef ASM_NAME_TO_STRING
2727 #define ASM_NAME_TO_STRING(STR, NAME) \
2729 if ((NAME)[0] == '*') \
2730 dyn_string_append (STR, NAME + 1); \
2733 const char *newstr; \
2734 STRIP_NAME_ENCODING (newstr, NAME); \
2735 dyn_string_append (STR, user_label_prefix); \
2736 dyn_string_append (STR, newstr); \
2742 /* Convert an integer constant expression into assembler syntax. Addition
2743 and subtraction are the only arithmetic that may appear in these
2744 expressions. This is an adaptation of output_addr_const in final.c.
2745 Here, the target of the conversion is a string buffer. We can't use
2746 output_addr_const directly, because it writes to a file. */
2749 addr_const_to_string (str, x)
2756 switch (GET_CODE (x))
2760 dyn_string_append (str, ",");
2766 ASM_NAME_TO_STRING (str, XSTR (x, 0));
2770 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2771 ASM_NAME_TO_STRING (str, buf1);
2775 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2776 ASM_NAME_TO_STRING (str, buf1);
2780 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2781 dyn_string_append (str, buf1);
2785 /* This used to output parentheses around the expression, but that does
2786 not work on the 386 (either ATT or BSD assembler). */
2787 addr_const_to_string (str, XEXP (x, 0));
2791 if (GET_MODE (x) == VOIDmode)
2793 /* We can use %d if the number is one word and positive. */
2794 if (CONST_DOUBLE_HIGH (x))
2795 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2796 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2797 else if (CONST_DOUBLE_LOW (x) < 0)
2798 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2800 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2801 CONST_DOUBLE_LOW (x));
2802 dyn_string_append (str, buf1);
2805 /* We can't handle floating point constants; PRINT_OPERAND must
2807 output_operand_lossage ("floating constant misused");
2811 /* Some assemblers need integer constants to appear last (eg masm). */
2812 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2814 addr_const_to_string (str, XEXP (x, 1));
2815 if (INTVAL (XEXP (x, 0)) >= 0)
2816 dyn_string_append (str, "+");
2818 addr_const_to_string (str, XEXP (x, 0));
2822 addr_const_to_string (str, XEXP (x, 0));
2823 if (INTVAL (XEXP (x, 1)) >= 0)
2824 dyn_string_append (str, "+");
2826 addr_const_to_string (str, XEXP (x, 1));
2831 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2832 can't handle that. */
2833 x = simplify_subtraction (x);
2834 if (GET_CODE (x) != MINUS)
2837 addr_const_to_string (str, XEXP (x, 0));
2838 dyn_string_append (str, "-");
2839 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2840 && INTVAL (XEXP (x, 1)) < 0)
2842 dyn_string_append (str, ASM_OPEN_PAREN);
2843 addr_const_to_string (str, XEXP (x, 1));
2844 dyn_string_append (str, ASM_CLOSE_PAREN);
2847 addr_const_to_string (str, XEXP (x, 1));
2852 addr_const_to_string (str, XEXP (x, 0));
2856 output_operand_lossage ("invalid expression as operand");
2860 /* Convert an address constant to a string, and return a pointer to
2861 a copy of the result, located on the heap. */
2867 dyn_string_t ds = dyn_string_new (256);
2870 addr_const_to_string (ds, x);
2872 /* Return the dynamically allocated string, but free the
2873 dyn_string_t itself. */
2879 /* Test if rtl node points to a pseudo register. */
2885 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2886 || ((GET_CODE (rtl) == SUBREG)
2887 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2890 /* Return a reference to a type, with its const and volatile qualifiers
2894 type_main_variant (type)
2897 type = TYPE_MAIN_VARIANT (type);
2899 /* There really should be only one main variant among any group of variants
2900 of a given type (and all of the MAIN_VARIANT values for all members of
2901 the group should point to that one type) but sometimes the C front-end
2902 messes this up for array types, so we work around that bug here. */
2904 if (TREE_CODE (type) == ARRAY_TYPE)
2905 while (type != TYPE_MAIN_VARIANT (type))
2906 type = TYPE_MAIN_VARIANT (type);
2911 /* Return non-zero if the given type node represents a tagged type. */
2914 is_tagged_type (type)
2917 register enum tree_code code = TREE_CODE (type);
2919 return (code == RECORD_TYPE || code == UNION_TYPE
2920 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2923 /* Convert a DIE tag into its string name. */
2926 dwarf_tag_name (tag)
2927 register unsigned tag;
2931 case DW_TAG_padding:
2932 return "DW_TAG_padding";
2933 case DW_TAG_array_type:
2934 return "DW_TAG_array_type";
2935 case DW_TAG_class_type:
2936 return "DW_TAG_class_type";
2937 case DW_TAG_entry_point:
2938 return "DW_TAG_entry_point";
2939 case DW_TAG_enumeration_type:
2940 return "DW_TAG_enumeration_type";
2941 case DW_TAG_formal_parameter:
2942 return "DW_TAG_formal_parameter";
2943 case DW_TAG_imported_declaration:
2944 return "DW_TAG_imported_declaration";
2946 return "DW_TAG_label";
2947 case DW_TAG_lexical_block:
2948 return "DW_TAG_lexical_block";
2950 return "DW_TAG_member";
2951 case DW_TAG_pointer_type:
2952 return "DW_TAG_pointer_type";
2953 case DW_TAG_reference_type:
2954 return "DW_TAG_reference_type";
2955 case DW_TAG_compile_unit:
2956 return "DW_TAG_compile_unit";
2957 case DW_TAG_string_type:
2958 return "DW_TAG_string_type";
2959 case DW_TAG_structure_type:
2960 return "DW_TAG_structure_type";
2961 case DW_TAG_subroutine_type:
2962 return "DW_TAG_subroutine_type";
2963 case DW_TAG_typedef:
2964 return "DW_TAG_typedef";
2965 case DW_TAG_union_type:
2966 return "DW_TAG_union_type";
2967 case DW_TAG_unspecified_parameters:
2968 return "DW_TAG_unspecified_parameters";
2969 case DW_TAG_variant:
2970 return "DW_TAG_variant";
2971 case DW_TAG_common_block:
2972 return "DW_TAG_common_block";
2973 case DW_TAG_common_inclusion:
2974 return "DW_TAG_common_inclusion";
2975 case DW_TAG_inheritance:
2976 return "DW_TAG_inheritance";
2977 case DW_TAG_inlined_subroutine:
2978 return "DW_TAG_inlined_subroutine";
2980 return "DW_TAG_module";
2981 case DW_TAG_ptr_to_member_type:
2982 return "DW_TAG_ptr_to_member_type";
2983 case DW_TAG_set_type:
2984 return "DW_TAG_set_type";
2985 case DW_TAG_subrange_type:
2986 return "DW_TAG_subrange_type";
2987 case DW_TAG_with_stmt:
2988 return "DW_TAG_with_stmt";
2989 case DW_TAG_access_declaration:
2990 return "DW_TAG_access_declaration";
2991 case DW_TAG_base_type:
2992 return "DW_TAG_base_type";
2993 case DW_TAG_catch_block:
2994 return "DW_TAG_catch_block";
2995 case DW_TAG_const_type:
2996 return "DW_TAG_const_type";
2997 case DW_TAG_constant:
2998 return "DW_TAG_constant";
2999 case DW_TAG_enumerator:
3000 return "DW_TAG_enumerator";
3001 case DW_TAG_file_type:
3002 return "DW_TAG_file_type";
3004 return "DW_TAG_friend";
3005 case DW_TAG_namelist:
3006 return "DW_TAG_namelist";
3007 case DW_TAG_namelist_item:
3008 return "DW_TAG_namelist_item";
3009 case DW_TAG_packed_type:
3010 return "DW_TAG_packed_type";
3011 case DW_TAG_subprogram:
3012 return "DW_TAG_subprogram";
3013 case DW_TAG_template_type_param:
3014 return "DW_TAG_template_type_param";
3015 case DW_TAG_template_value_param:
3016 return "DW_TAG_template_value_param";
3017 case DW_TAG_thrown_type:
3018 return "DW_TAG_thrown_type";
3019 case DW_TAG_try_block:
3020 return "DW_TAG_try_block";
3021 case DW_TAG_variant_part:
3022 return "DW_TAG_variant_part";
3023 case DW_TAG_variable:
3024 return "DW_TAG_variable";
3025 case DW_TAG_volatile_type:
3026 return "DW_TAG_volatile_type";
3027 case DW_TAG_MIPS_loop:
3028 return "DW_TAG_MIPS_loop";
3029 case DW_TAG_format_label:
3030 return "DW_TAG_format_label";
3031 case DW_TAG_function_template:
3032 return "DW_TAG_function_template";
3033 case DW_TAG_class_template:
3034 return "DW_TAG_class_template";
3036 return "DW_TAG_<unknown>";
3040 /* Convert a DWARF attribute code into its string name. */
3043 dwarf_attr_name (attr)
3044 register unsigned attr;
3049 return "DW_AT_sibling";
3050 case DW_AT_location:
3051 return "DW_AT_location";
3053 return "DW_AT_name";
3054 case DW_AT_ordering:
3055 return "DW_AT_ordering";
3056 case DW_AT_subscr_data:
3057 return "DW_AT_subscr_data";
3058 case DW_AT_byte_size:
3059 return "DW_AT_byte_size";
3060 case DW_AT_bit_offset:
3061 return "DW_AT_bit_offset";
3062 case DW_AT_bit_size:
3063 return "DW_AT_bit_size";
3064 case DW_AT_element_list:
3065 return "DW_AT_element_list";
3066 case DW_AT_stmt_list:
3067 return "DW_AT_stmt_list";
3069 return "DW_AT_low_pc";
3071 return "DW_AT_high_pc";
3072 case DW_AT_language:
3073 return "DW_AT_language";
3075 return "DW_AT_member";
3077 return "DW_AT_discr";
3078 case DW_AT_discr_value:
3079 return "DW_AT_discr_value";
3080 case DW_AT_visibility:
3081 return "DW_AT_visibility";
3083 return "DW_AT_import";
3084 case DW_AT_string_length:
3085 return "DW_AT_string_length";
3086 case DW_AT_common_reference:
3087 return "DW_AT_common_reference";
3088 case DW_AT_comp_dir:
3089 return "DW_AT_comp_dir";
3090 case DW_AT_const_value:
3091 return "DW_AT_const_value";
3092 case DW_AT_containing_type:
3093 return "DW_AT_containing_type";
3094 case DW_AT_default_value:
3095 return "DW_AT_default_value";
3097 return "DW_AT_inline";
3098 case DW_AT_is_optional:
3099 return "DW_AT_is_optional";
3100 case DW_AT_lower_bound:
3101 return "DW_AT_lower_bound";
3102 case DW_AT_producer:
3103 return "DW_AT_producer";
3104 case DW_AT_prototyped:
3105 return "DW_AT_prototyped";
3106 case DW_AT_return_addr:
3107 return "DW_AT_return_addr";
3108 case DW_AT_start_scope:
3109 return "DW_AT_start_scope";
3110 case DW_AT_stride_size:
3111 return "DW_AT_stride_size";
3112 case DW_AT_upper_bound:
3113 return "DW_AT_upper_bound";
3114 case DW_AT_abstract_origin:
3115 return "DW_AT_abstract_origin";
3116 case DW_AT_accessibility:
3117 return "DW_AT_accessibility";
3118 case DW_AT_address_class:
3119 return "DW_AT_address_class";
3120 case DW_AT_artificial:
3121 return "DW_AT_artificial";
3122 case DW_AT_base_types:
3123 return "DW_AT_base_types";
3124 case DW_AT_calling_convention:
3125 return "DW_AT_calling_convention";
3127 return "DW_AT_count";
3128 case DW_AT_data_member_location:
3129 return "DW_AT_data_member_location";
3130 case DW_AT_decl_column:
3131 return "DW_AT_decl_column";
3132 case DW_AT_decl_file:
3133 return "DW_AT_decl_file";
3134 case DW_AT_decl_line:
3135 return "DW_AT_decl_line";
3136 case DW_AT_declaration:
3137 return "DW_AT_declaration";
3138 case DW_AT_discr_list:
3139 return "DW_AT_discr_list";
3140 case DW_AT_encoding:
3141 return "DW_AT_encoding";
3142 case DW_AT_external:
3143 return "DW_AT_external";
3144 case DW_AT_frame_base:
3145 return "DW_AT_frame_base";
3147 return "DW_AT_friend";
3148 case DW_AT_identifier_case:
3149 return "DW_AT_identifier_case";
3150 case DW_AT_macro_info:
3151 return "DW_AT_macro_info";
3152 case DW_AT_namelist_items:
3153 return "DW_AT_namelist_items";
3154 case DW_AT_priority:
3155 return "DW_AT_priority";
3157 return "DW_AT_segment";
3158 case DW_AT_specification:
3159 return "DW_AT_specification";
3160 case DW_AT_static_link:
3161 return "DW_AT_static_link";
3163 return "DW_AT_type";
3164 case DW_AT_use_location:
3165 return "DW_AT_use_location";
3166 case DW_AT_variable_parameter:
3167 return "DW_AT_variable_parameter";
3168 case DW_AT_virtuality:
3169 return "DW_AT_virtuality";
3170 case DW_AT_vtable_elem_location:
3171 return "DW_AT_vtable_elem_location";
3173 case DW_AT_MIPS_fde:
3174 return "DW_AT_MIPS_fde";
3175 case DW_AT_MIPS_loop_begin:
3176 return "DW_AT_MIPS_loop_begin";
3177 case DW_AT_MIPS_tail_loop_begin:
3178 return "DW_AT_MIPS_tail_loop_begin";
3179 case DW_AT_MIPS_epilog_begin:
3180 return "DW_AT_MIPS_epilog_begin";
3181 case DW_AT_MIPS_loop_unroll_factor:
3182 return "DW_AT_MIPS_loop_unroll_factor";
3183 case DW_AT_MIPS_software_pipeline_depth:
3184 return "DW_AT_MIPS_software_pipeline_depth";
3185 case DW_AT_MIPS_linkage_name:
3186 return "DW_AT_MIPS_linkage_name";
3187 case DW_AT_MIPS_stride:
3188 return "DW_AT_MIPS_stride";
3189 case DW_AT_MIPS_abstract_name:
3190 return "DW_AT_MIPS_abstract_name";
3191 case DW_AT_MIPS_clone_origin:
3192 return "DW_AT_MIPS_clone_origin";
3193 case DW_AT_MIPS_has_inlines:
3194 return "DW_AT_MIPS_has_inlines";
3196 case DW_AT_sf_names:
3197 return "DW_AT_sf_names";
3198 case DW_AT_src_info:
3199 return "DW_AT_src_info";
3200 case DW_AT_mac_info:
3201 return "DW_AT_mac_info";
3202 case DW_AT_src_coords:
3203 return "DW_AT_src_coords";
3204 case DW_AT_body_begin:
3205 return "DW_AT_body_begin";
3206 case DW_AT_body_end:
3207 return "DW_AT_body_end";
3209 return "DW_AT_<unknown>";
3213 /* Convert a DWARF value form code into its string name. */
3216 dwarf_form_name (form)
3217 register unsigned form;
3222 return "DW_FORM_addr";
3223 case DW_FORM_block2:
3224 return "DW_FORM_block2";
3225 case DW_FORM_block4:
3226 return "DW_FORM_block4";
3228 return "DW_FORM_data2";
3230 return "DW_FORM_data4";
3232 return "DW_FORM_data8";
3233 case DW_FORM_string:
3234 return "DW_FORM_string";
3236 return "DW_FORM_block";
3237 case DW_FORM_block1:
3238 return "DW_FORM_block1";
3240 return "DW_FORM_data1";
3242 return "DW_FORM_flag";
3244 return "DW_FORM_sdata";
3246 return "DW_FORM_strp";
3248 return "DW_FORM_udata";
3249 case DW_FORM_ref_addr:
3250 return "DW_FORM_ref_addr";
3252 return "DW_FORM_ref1";
3254 return "DW_FORM_ref2";
3256 return "DW_FORM_ref4";
3258 return "DW_FORM_ref8";
3259 case DW_FORM_ref_udata:
3260 return "DW_FORM_ref_udata";
3261 case DW_FORM_indirect:
3262 return "DW_FORM_indirect";
3264 return "DW_FORM_<unknown>";
3268 /* Convert a DWARF stack opcode into its string name. */
3271 dwarf_stack_op_name (op)
3272 register unsigned op;
3277 return "DW_OP_addr";
3279 return "DW_OP_deref";
3281 return "DW_OP_const1u";
3283 return "DW_OP_const1s";
3285 return "DW_OP_const2u";
3287 return "DW_OP_const2s";
3289 return "DW_OP_const4u";
3291 return "DW_OP_const4s";
3293 return "DW_OP_const8u";
3295 return "DW_OP_const8s";
3297 return "DW_OP_constu";
3299 return "DW_OP_consts";
3303 return "DW_OP_drop";
3305 return "DW_OP_over";
3307 return "DW_OP_pick";
3309 return "DW_OP_swap";
3313 return "DW_OP_xderef";
3321 return "DW_OP_minus";
3333 return "DW_OP_plus";
3334 case DW_OP_plus_uconst:
3335 return "DW_OP_plus_uconst";
3341 return "DW_OP_shra";
3359 return "DW_OP_skip";
3361 return "DW_OP_lit0";
3363 return "DW_OP_lit1";
3365 return "DW_OP_lit2";
3367 return "DW_OP_lit3";
3369 return "DW_OP_lit4";
3371 return "DW_OP_lit5";
3373 return "DW_OP_lit6";
3375 return "DW_OP_lit7";
3377 return "DW_OP_lit8";
3379 return "DW_OP_lit9";
3381 return "DW_OP_lit10";
3383 return "DW_OP_lit11";
3385 return "DW_OP_lit12";
3387 return "DW_OP_lit13";
3389 return "DW_OP_lit14";
3391 return "DW_OP_lit15";
3393 return "DW_OP_lit16";
3395 return "DW_OP_lit17";
3397 return "DW_OP_lit18";
3399 return "DW_OP_lit19";
3401 return "DW_OP_lit20";
3403 return "DW_OP_lit21";
3405 return "DW_OP_lit22";
3407 return "DW_OP_lit23";
3409 return "DW_OP_lit24";
3411 return "DW_OP_lit25";
3413 return "DW_OP_lit26";
3415 return "DW_OP_lit27";
3417 return "DW_OP_lit28";
3419 return "DW_OP_lit29";
3421 return "DW_OP_lit30";
3423 return "DW_OP_lit31";
3425 return "DW_OP_reg0";
3427 return "DW_OP_reg1";
3429 return "DW_OP_reg2";
3431 return "DW_OP_reg3";
3433 return "DW_OP_reg4";
3435 return "DW_OP_reg5";
3437 return "DW_OP_reg6";
3439 return "DW_OP_reg7";
3441 return "DW_OP_reg8";
3443 return "DW_OP_reg9";
3445 return "DW_OP_reg10";
3447 return "DW_OP_reg11";
3449 return "DW_OP_reg12";
3451 return "DW_OP_reg13";
3453 return "DW_OP_reg14";
3455 return "DW_OP_reg15";
3457 return "DW_OP_reg16";
3459 return "DW_OP_reg17";
3461 return "DW_OP_reg18";
3463 return "DW_OP_reg19";
3465 return "DW_OP_reg20";
3467 return "DW_OP_reg21";
3469 return "DW_OP_reg22";
3471 return "DW_OP_reg23";
3473 return "DW_OP_reg24";
3475 return "DW_OP_reg25";
3477 return "DW_OP_reg26";
3479 return "DW_OP_reg27";
3481 return "DW_OP_reg28";
3483 return "DW_OP_reg29";
3485 return "DW_OP_reg30";
3487 return "DW_OP_reg31";
3489 return "DW_OP_breg0";
3491 return "DW_OP_breg1";
3493 return "DW_OP_breg2";
3495 return "DW_OP_breg3";
3497 return "DW_OP_breg4";
3499 return "DW_OP_breg5";
3501 return "DW_OP_breg6";
3503 return "DW_OP_breg7";
3505 return "DW_OP_breg8";
3507 return "DW_OP_breg9";
3509 return "DW_OP_breg10";
3511 return "DW_OP_breg11";
3513 return "DW_OP_breg12";
3515 return "DW_OP_breg13";
3517 return "DW_OP_breg14";
3519 return "DW_OP_breg15";
3521 return "DW_OP_breg16";
3523 return "DW_OP_breg17";
3525 return "DW_OP_breg18";
3527 return "DW_OP_breg19";
3529 return "DW_OP_breg20";
3531 return "DW_OP_breg21";
3533 return "DW_OP_breg22";
3535 return "DW_OP_breg23";
3537 return "DW_OP_breg24";
3539 return "DW_OP_breg25";
3541 return "DW_OP_breg26";
3543 return "DW_OP_breg27";
3545 return "DW_OP_breg28";
3547 return "DW_OP_breg29";
3549 return "DW_OP_breg30";
3551 return "DW_OP_breg31";
3553 return "DW_OP_regx";
3555 return "DW_OP_fbreg";
3557 return "DW_OP_bregx";
3559 return "DW_OP_piece";
3560 case DW_OP_deref_size:
3561 return "DW_OP_deref_size";
3562 case DW_OP_xderef_size:
3563 return "DW_OP_xderef_size";
3567 return "OP_<unknown>";
3571 /* Convert a DWARF type code into its string name. */
3575 dwarf_type_encoding_name (enc)
3576 register unsigned enc;
3580 case DW_ATE_address:
3581 return "DW_ATE_address";
3582 case DW_ATE_boolean:
3583 return "DW_ATE_boolean";
3584 case DW_ATE_complex_float:
3585 return "DW_ATE_complex_float";
3587 return "DW_ATE_float";
3589 return "DW_ATE_signed";
3590 case DW_ATE_signed_char:
3591 return "DW_ATE_signed_char";
3592 case DW_ATE_unsigned:
3593 return "DW_ATE_unsigned";
3594 case DW_ATE_unsigned_char:
3595 return "DW_ATE_unsigned_char";
3597 return "DW_ATE_<unknown>";
3602 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3603 instance of an inlined instance of a decl which is local to an inline
3604 function, so we have to trace all of the way back through the origin chain
3605 to find out what sort of node actually served as the original seed for the
3609 decl_ultimate_origin (decl)
3612 #ifdef ENABLE_CHECKING
3613 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
3614 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
3615 most distant ancestor, this should never happen. */
3619 return DECL_ABSTRACT_ORIGIN (decl);
3622 /* Determine the "ultimate origin" of a block. The block may be an inlined
3623 instance of an inlined instance of a block which is local to an inline
3624 function, so we have to trace all of the way back through the origin chain
3625 to find out what sort of node actually served as the original seed for the
3629 block_ultimate_origin (block)
3630 register tree block;
3632 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3634 if (immediate_origin == NULL_TREE)
3638 register tree ret_val;
3639 register tree lookahead = immediate_origin;
3643 ret_val = lookahead;
3644 lookahead = (TREE_CODE (ret_val) == BLOCK)
3645 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3648 while (lookahead != NULL && lookahead != ret_val);
3654 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3655 of a virtual function may refer to a base class, so we check the 'this'
3659 decl_class_context (decl)
3662 tree context = NULL_TREE;
3664 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3665 context = DECL_CONTEXT (decl);
3667 context = TYPE_MAIN_VARIANT
3668 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3670 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3671 context = NULL_TREE;
3676 /* Add an attribute/value pair to a DIE */
3679 add_dwarf_attr (die, attr)
3680 register dw_die_ref die;
3681 register dw_attr_ref attr;
3683 if (die != NULL && attr != NULL)
3685 if (die->die_attr == NULL)
3687 die->die_attr = attr;
3688 die->die_attr_last = attr;
3692 die->die_attr_last->dw_attr_next = attr;
3693 die->die_attr_last = attr;
3698 /* Add a flag value attribute to a DIE. */
3701 add_AT_flag (die, attr_kind, flag)
3702 register dw_die_ref die;
3703 register enum dwarf_attribute attr_kind;
3704 register unsigned flag;
3706 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3708 attr->dw_attr_next = NULL;
3709 attr->dw_attr = attr_kind;
3710 attr->dw_attr_val.val_class = dw_val_class_flag;
3711 attr->dw_attr_val.v.val_flag = flag;
3712 add_dwarf_attr (die, attr);
3715 /* Add a signed integer attribute value to a DIE. */
3718 add_AT_int (die, attr_kind, int_val)
3719 register dw_die_ref die;
3720 register enum dwarf_attribute attr_kind;
3721 register long int int_val;
3723 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3725 attr->dw_attr_next = NULL;
3726 attr->dw_attr = attr_kind;
3727 attr->dw_attr_val.val_class = dw_val_class_const;
3728 attr->dw_attr_val.v.val_int = int_val;
3729 add_dwarf_attr (die, attr);
3732 /* Add an unsigned integer attribute value to a DIE. */
3735 add_AT_unsigned (die, attr_kind, unsigned_val)
3736 register dw_die_ref die;
3737 register enum dwarf_attribute attr_kind;
3738 register unsigned long unsigned_val;
3740 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3742 attr->dw_attr_next = NULL;
3743 attr->dw_attr = attr_kind;
3744 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
3745 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3746 add_dwarf_attr (die, attr);
3749 /* Add an unsigned double integer attribute value to a DIE. */
3752 add_AT_long_long (die, attr_kind, val_hi, val_low)
3753 register dw_die_ref die;
3754 register enum dwarf_attribute attr_kind;
3755 register unsigned long val_hi;
3756 register unsigned long val_low;
3758 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3760 attr->dw_attr_next = NULL;
3761 attr->dw_attr = attr_kind;
3762 attr->dw_attr_val.val_class = dw_val_class_long_long;
3763 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3764 attr->dw_attr_val.v.val_long_long.low = val_low;
3765 add_dwarf_attr (die, attr);
3768 /* Add a floating point attribute value to a DIE and return it. */
3771 add_AT_float (die, attr_kind, length, array)
3772 register dw_die_ref die;
3773 register enum dwarf_attribute attr_kind;
3774 register unsigned length;
3775 register long *array;
3777 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3779 attr->dw_attr_next = NULL;
3780 attr->dw_attr = attr_kind;
3781 attr->dw_attr_val.val_class = dw_val_class_float;
3782 attr->dw_attr_val.v.val_float.length = length;
3783 attr->dw_attr_val.v.val_float.array = array;
3784 add_dwarf_attr (die, attr);
3787 /* Add a string attribute value to a DIE. */
3790 add_AT_string (die, attr_kind, str)
3791 register dw_die_ref die;
3792 register enum dwarf_attribute attr_kind;
3793 register const char *str;
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_str;
3800 attr->dw_attr_val.v.val_str = xstrdup (str);
3801 add_dwarf_attr (die, attr);
3804 /* Add a DIE reference attribute value to a DIE. */
3807 add_AT_die_ref (die, attr_kind, targ_die)
3808 register dw_die_ref die;
3809 register enum dwarf_attribute attr_kind;
3810 register dw_die_ref targ_die;
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_die_ref;
3817 attr->dw_attr_val.v.val_die_ref = targ_die;
3818 add_dwarf_attr (die, attr);
3821 /* Add an FDE reference attribute value to a DIE. */
3824 add_AT_fde_ref (die, attr_kind, targ_fde)
3825 register dw_die_ref die;
3826 register enum dwarf_attribute attr_kind;
3827 register unsigned targ_fde;
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_fde_ref;
3834 attr->dw_attr_val.v.val_fde_index = targ_fde;
3835 add_dwarf_attr (die, attr);
3838 /* Add a location description attribute value to a DIE. */
3841 add_AT_loc (die, attr_kind, loc)
3842 register dw_die_ref die;
3843 register enum dwarf_attribute attr_kind;
3844 register dw_loc_descr_ref loc;
3846 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3848 attr->dw_attr_next = NULL;
3849 attr->dw_attr = attr_kind;
3850 attr->dw_attr_val.val_class = dw_val_class_loc;
3851 attr->dw_attr_val.v.val_loc = loc;
3852 add_dwarf_attr (die, attr);
3855 /* Add an address constant attribute value to a DIE. */
3858 add_AT_addr (die, attr_kind, addr)
3859 register dw_die_ref die;
3860 register enum dwarf_attribute attr_kind;
3863 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3865 attr->dw_attr_next = NULL;
3866 attr->dw_attr = attr_kind;
3867 attr->dw_attr_val.val_class = dw_val_class_addr;
3868 attr->dw_attr_val.v.val_addr = addr;
3869 add_dwarf_attr (die, attr);
3872 /* Add a label identifier attribute value to a DIE. */
3875 add_AT_lbl_id (die, attr_kind, lbl_id)
3876 register dw_die_ref die;
3877 register enum dwarf_attribute attr_kind;
3878 register char *lbl_id;
3880 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3882 attr->dw_attr_next = NULL;
3883 attr->dw_attr = attr_kind;
3884 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3885 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3886 add_dwarf_attr (die, attr);
3889 /* Add a section offset attribute value to a DIE. */
3892 add_AT_lbl_offset (die, attr_kind, label)
3893 register dw_die_ref die;
3894 register enum dwarf_attribute attr_kind;
3895 register char *label;
3897 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3899 attr->dw_attr_next = NULL;
3900 attr->dw_attr = attr_kind;
3901 attr->dw_attr_val.val_class = dw_val_class_lbl_offset;
3902 attr->dw_attr_val.v.val_lbl_id = label;
3903 add_dwarf_attr (die, attr);
3907 /* Test if die refers to an external subroutine. */
3910 is_extern_subr_die (die)
3911 register dw_die_ref die;
3913 register dw_attr_ref a;
3914 register int is_subr = FALSE;
3915 register int is_extern = FALSE;
3917 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3920 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3922 if (a->dw_attr == DW_AT_external
3923 && a->dw_attr_val.val_class == dw_val_class_flag
3924 && a->dw_attr_val.v.val_flag != 0)
3932 return is_subr && is_extern;
3935 /* Get the attribute of type attr_kind. */
3937 static inline dw_attr_ref
3938 get_AT (die, attr_kind)
3939 register dw_die_ref die;
3940 register enum dwarf_attribute attr_kind;
3942 register dw_attr_ref a;
3943 register dw_die_ref spec = NULL;
3947 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3949 if (a->dw_attr == attr_kind)
3952 if (a->dw_attr == DW_AT_specification
3953 || a->dw_attr == DW_AT_abstract_origin)
3954 spec = a->dw_attr_val.v.val_die_ref;
3958 return get_AT (spec, attr_kind);
3964 /* Return the "low pc" attribute value, typically associated with
3965 a subprogram DIE. Return null if the "low pc" attribute is
3966 either not prsent, or if it cannot be represented as an
3967 assembler label identifier. */
3969 static inline char *
3971 register dw_die_ref die;
3973 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3975 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3976 return a->dw_attr_val.v.val_lbl_id;
3981 /* Return the "high pc" attribute value, typically associated with
3982 a subprogram DIE. Return null if the "high pc" attribute is
3983 either not prsent, or if it cannot be represented as an
3984 assembler label identifier. */
3986 static inline char *
3988 register dw_die_ref die;
3990 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
3992 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3993 return a->dw_attr_val.v.val_lbl_id;
3998 /* Return the value of the string attribute designated by ATTR_KIND, or
3999 NULL if it is not present. */
4001 static inline char *
4002 get_AT_string (die, attr_kind)
4003 register dw_die_ref die;
4004 register enum dwarf_attribute attr_kind;
4006 register dw_attr_ref a = get_AT (die, attr_kind);
4008 if (a && a->dw_attr_val.val_class == dw_val_class_str)
4009 return a->dw_attr_val.v.val_str;
4014 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
4015 if it is not present. */
4018 get_AT_flag (die, attr_kind)
4019 register dw_die_ref die;
4020 register enum dwarf_attribute attr_kind;
4022 register dw_attr_ref a = get_AT (die, attr_kind);
4024 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
4025 return a->dw_attr_val.v.val_flag;
4030 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
4031 if it is not present. */
4033 static inline unsigned
4034 get_AT_unsigned (die, attr_kind)
4035 register dw_die_ref die;
4036 register enum dwarf_attribute attr_kind;
4038 register dw_attr_ref a = get_AT (die, attr_kind);
4040 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
4041 return a->dw_attr_val.v.val_unsigned;
4049 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4051 return (lang == DW_LANG_C || lang == DW_LANG_C89
4052 || lang == DW_LANG_C_plus_plus);
4058 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4060 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
4063 /* Remove the specified attribute if present. */
4066 remove_AT (die, attr_kind)
4067 register dw_die_ref die;
4068 register enum dwarf_attribute attr_kind;
4070 register dw_attr_ref a;
4071 register dw_attr_ref removed = NULL;
4075 if (die->die_attr->dw_attr == attr_kind)
4077 removed = die->die_attr;
4078 if (die->die_attr_last == die->die_attr)
4079 die->die_attr_last = NULL;
4081 die->die_attr = die->die_attr->dw_attr_next;
4085 for (a = die->die_attr; a->dw_attr_next != NULL;
4086 a = a->dw_attr_next)
4087 if (a->dw_attr_next->dw_attr == attr_kind)
4089 removed = a->dw_attr_next;
4090 if (die->die_attr_last == a->dw_attr_next)
4091 die->die_attr_last = a;
4093 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4102 /* Discard the children of this DIE. */
4105 remove_children (die)
4106 register dw_die_ref die;
4108 register dw_die_ref child_die = die->die_child;
4110 die->die_child = NULL;
4111 die->die_child_last = NULL;
4113 while (child_die != NULL)
4115 register dw_die_ref tmp_die = child_die;
4116 register dw_attr_ref a;
4118 child_die = child_die->die_sib;
4120 for (a = tmp_die->die_attr; a != NULL; )
4122 register dw_attr_ref tmp_a = a;
4124 a = a->dw_attr_next;
4132 /* Add a child DIE below its parent. */
4135 add_child_die (die, child_die)
4136 register dw_die_ref die;
4137 register dw_die_ref child_die;
4139 if (die != NULL && child_die != NULL)
4141 if (die == child_die)
4143 child_die->die_parent = die;
4144 child_die->die_sib = NULL;
4146 if (die->die_child == NULL)
4148 die->die_child = child_die;
4149 die->die_child_last = child_die;
4153 die->die_child_last->die_sib = child_die;
4154 die->die_child_last = child_die;
4159 /* Return a pointer to a newly created DIE node. */
4161 static inline dw_die_ref
4162 new_die (tag_value, parent_die)
4163 register enum dwarf_tag tag_value;
4164 register dw_die_ref parent_die;
4166 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4168 die->die_tag = tag_value;
4169 die->die_abbrev = 0;
4170 die->die_offset = 0;
4171 die->die_child = NULL;
4172 die->die_parent = NULL;
4173 die->die_sib = NULL;
4174 die->die_child_last = NULL;
4175 die->die_attr = NULL;
4176 die->die_attr_last = NULL;
4178 if (parent_die != NULL)
4179 add_child_die (parent_die, die);
4182 limbo_die_node *limbo_node;
4184 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4185 limbo_node->die = die;
4186 limbo_node->next = limbo_die_list;
4187 limbo_die_list = limbo_node;
4193 /* Return the DIE associated with the given type specifier. */
4195 static inline dw_die_ref
4196 lookup_type_die (type)
4199 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4202 /* Equate a DIE to a given type specifier. */
4205 equate_type_number_to_die (type, type_die)
4207 register dw_die_ref type_die;
4209 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4212 /* Return the DIE associated with a given declaration. */
4214 static inline dw_die_ref
4215 lookup_decl_die (decl)
4218 register unsigned decl_id = DECL_UID (decl);
4220 return (decl_id < decl_die_table_in_use
4221 ? decl_die_table[decl_id] : NULL);
4224 /* Equate a DIE to a particular declaration. */
4227 equate_decl_number_to_die (decl, decl_die)
4229 register dw_die_ref decl_die;
4231 register unsigned decl_id = DECL_UID (decl);
4232 register unsigned num_allocated;
4234 if (decl_id >= decl_die_table_allocated)
4237 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4238 / DECL_DIE_TABLE_INCREMENT)
4239 * DECL_DIE_TABLE_INCREMENT;
4242 = (dw_die_ref *) xrealloc (decl_die_table,
4243 sizeof (dw_die_ref) * num_allocated);
4245 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4246 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4247 decl_die_table_allocated = num_allocated;
4250 if (decl_id >= decl_die_table_in_use)
4251 decl_die_table_in_use = (decl_id + 1);
4253 decl_die_table[decl_id] = decl_die;
4256 /* Return a pointer to a newly allocated location description. Location
4257 descriptions are simple expression terms that can be strung
4258 together to form more complicated location (address) descriptions. */
4260 static inline dw_loc_descr_ref
4261 new_loc_descr (op, oprnd1, oprnd2)
4262 register enum dwarf_location_atom op;
4263 register unsigned long oprnd1;
4264 register unsigned long oprnd2;
4266 register dw_loc_descr_ref descr
4267 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4269 descr->dw_loc_next = NULL;
4270 descr->dw_loc_opc = op;
4271 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4272 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4273 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4274 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4279 /* Add a location description term to a location description expression. */
4282 add_loc_descr (list_head, descr)
4283 register dw_loc_descr_ref *list_head;
4284 register dw_loc_descr_ref descr;
4286 register dw_loc_descr_ref *d;
4288 /* Find the end of the chain. */
4289 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4295 /* Keep track of the number of spaces used to indent the
4296 output of the debugging routines that print the structure of
4297 the DIE internal representation. */
4298 static int print_indent;
4300 /* Indent the line the number of spaces given by print_indent. */
4303 print_spaces (outfile)
4306 fprintf (outfile, "%*s", print_indent, "");
4309 /* Print the information associated with a given DIE, and its children.
4310 This routine is a debugging aid only. */
4313 print_die (die, outfile)
4317 register dw_attr_ref a;
4318 register dw_die_ref c;
4320 print_spaces (outfile);
4321 fprintf (outfile, "DIE %4lu: %s\n",
4322 die->die_offset, dwarf_tag_name (die->die_tag));
4323 print_spaces (outfile);
4324 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4325 fprintf (outfile, " offset: %lu\n", die->die_offset);
4327 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4329 print_spaces (outfile);
4330 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4332 switch (a->dw_attr_val.val_class)
4334 case dw_val_class_addr:
4335 fprintf (outfile, "address");
4337 case dw_val_class_loc:
4338 fprintf (outfile, "location descriptor");
4340 case dw_val_class_const:
4341 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4343 case dw_val_class_unsigned_const:
4344 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4346 case dw_val_class_long_long:
4347 fprintf (outfile, "constant (%lu,%lu)",
4348 a->dw_attr_val.v.val_long_long.hi,
4349 a->dw_attr_val.v.val_long_long.low);
4351 case dw_val_class_float:
4352 fprintf (outfile, "floating-point constant");
4354 case dw_val_class_flag:
4355 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4357 case dw_val_class_die_ref:
4358 if (a->dw_attr_val.v.val_die_ref != NULL)
4359 fprintf (outfile, "die -> %lu",
4360 a->dw_attr_val.v.val_die_ref->die_offset);
4362 fprintf (outfile, "die -> <null>");
4364 case dw_val_class_lbl_id:
4365 case dw_val_class_lbl_offset:
4366 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4368 case dw_val_class_str:
4369 if (a->dw_attr_val.v.val_str != NULL)
4370 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4372 fprintf (outfile, "<null>");
4378 fprintf (outfile, "\n");
4381 if (die->die_child != NULL)
4384 for (c = die->die_child; c != NULL; c = c->die_sib)
4385 print_die (c, outfile);
4391 /* Print the contents of the source code line number correspondence table.
4392 This routine is a debugging aid only. */
4395 print_dwarf_line_table (outfile)
4398 register unsigned i;
4399 register dw_line_info_ref line_info;
4401 fprintf (outfile, "\n\nDWARF source line information\n");
4402 for (i = 1; i < line_info_table_in_use; ++i)
4404 line_info = &line_info_table[i];
4405 fprintf (outfile, "%5d: ", i);
4406 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4407 fprintf (outfile, "%6ld", line_info->dw_line_num);
4408 fprintf (outfile, "\n");
4411 fprintf (outfile, "\n\n");
4414 /* Print the information collected for a given DIE. */
4417 debug_dwarf_die (die)
4420 print_die (die, stderr);
4423 /* Print all DWARF information collected for the compilation unit.
4424 This routine is a debugging aid only. */
4430 print_die (comp_unit_die, stderr);
4431 if (! DWARF2_ASM_LINE_DEBUG_INFO)
4432 print_dwarf_line_table (stderr);
4435 /* Traverse the DIE, and add a sibling attribute if it may have the
4436 effect of speeding up access to siblings. To save some space,
4437 avoid generating sibling attributes for DIE's without children. */
4440 add_sibling_attributes(die)
4441 register dw_die_ref die;
4443 register dw_die_ref c;
4444 register dw_attr_ref attr;
4445 if (die != comp_unit_die && die->die_child != NULL)
4447 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4448 attr->dw_attr_next = NULL;
4449 attr->dw_attr = DW_AT_sibling;
4450 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4451 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4453 /* Add the sibling link to the front of the attribute list. */
4454 attr->dw_attr_next = die->die_attr;
4455 if (die->die_attr == NULL)
4456 die->die_attr_last = attr;
4458 die->die_attr = attr;
4461 for (c = die->die_child; c != NULL; c = c->die_sib)
4462 add_sibling_attributes (c);
4465 /* The format of each DIE (and its attribute value pairs)
4466 is encoded in an abbreviation table. This routine builds the
4467 abbreviation table and assigns a unique abbreviation id for
4468 each abbreviation entry. The children of each die are visited
4472 build_abbrev_table (die)
4473 register dw_die_ref die;
4475 register unsigned long abbrev_id;
4476 register unsigned long n_alloc;
4477 register dw_die_ref c;
4478 register dw_attr_ref d_attr, a_attr;
4479 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4481 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4483 if (abbrev->die_tag == die->die_tag)
4485 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4487 a_attr = abbrev->die_attr;
4488 d_attr = die->die_attr;
4490 while (a_attr != NULL && d_attr != NULL)
4492 if ((a_attr->dw_attr != d_attr->dw_attr)
4493 || (value_format (&a_attr->dw_attr_val)
4494 != value_format (&d_attr->dw_attr_val)))
4497 a_attr = a_attr->dw_attr_next;
4498 d_attr = d_attr->dw_attr_next;
4501 if (a_attr == NULL && d_attr == NULL)
4507 if (abbrev_id >= abbrev_die_table_in_use)
4509 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4511 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4513 = (dw_die_ref *) xrealloc (abbrev_die_table,
4514 sizeof (dw_die_ref) * n_alloc);
4516 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4517 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4518 abbrev_die_table_allocated = n_alloc;
4521 ++abbrev_die_table_in_use;
4522 abbrev_die_table[abbrev_id] = die;
4525 die->die_abbrev = abbrev_id;
4526 for (c = die->die_child; c != NULL; c = c->die_sib)
4527 build_abbrev_table (c);
4530 /* Return the size of a string, including the null byte.
4532 This used to treat backslashes as escapes, and hence they were not included
4533 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
4534 which treats a backslash as a backslash, escaping it if necessary, and hence
4535 we must include them in the count. */
4537 static unsigned long
4538 size_of_string (str)
4541 return strlen (str) + 1;
4544 /* Return the size of a location descriptor. */
4546 static unsigned long
4547 size_of_loc_descr (loc)
4548 register dw_loc_descr_ref loc;
4550 register unsigned long size = 1;
4552 switch (loc->dw_loc_opc)
4574 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4577 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4582 case DW_OP_plus_uconst:
4583 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4621 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4624 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4627 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4630 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4631 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4634 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4636 case DW_OP_deref_size:
4637 case DW_OP_xderef_size:
4647 /* Return the size of a series of location descriptors. */
4649 static unsigned long
4651 register dw_loc_descr_ref loc;
4653 register unsigned long size = 0;
4655 for (; loc != NULL; loc = loc->dw_loc_next)
4656 size += size_of_loc_descr (loc);
4661 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4664 constant_size (value)
4665 long unsigned value;
4672 log = floor_log2 (value);
4675 log = 1 << (floor_log2 (log) + 1);
4680 /* Return the size of a DIE, as it is represented in the
4681 .debug_info section. */
4683 static unsigned long
4685 register dw_die_ref die;
4687 register unsigned long size = 0;
4688 register dw_attr_ref a;
4690 size += size_of_uleb128 (die->die_abbrev);
4691 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4693 switch (a->dw_attr_val.val_class)
4695 case dw_val_class_addr:
4698 case dw_val_class_loc:
4700 register unsigned long lsize
4701 = size_of_locs (a->dw_attr_val.v.val_loc);
4704 size += constant_size (lsize);
4708 case dw_val_class_const:
4711 case dw_val_class_unsigned_const:
4712 size += constant_size (a->dw_attr_val.v.val_unsigned);
4714 case dw_val_class_long_long:
4715 size += 1 + 8; /* block */
4717 case dw_val_class_float:
4718 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4720 case dw_val_class_flag:
4723 case dw_val_class_die_ref:
4724 size += DWARF_OFFSET_SIZE;
4726 case dw_val_class_fde_ref:
4727 size += DWARF_OFFSET_SIZE;
4729 case dw_val_class_lbl_id:
4732 case dw_val_class_lbl_offset:
4733 size += DWARF_OFFSET_SIZE;
4735 case dw_val_class_str:
4736 size += size_of_string (a->dw_attr_val.v.val_str);
4746 /* Size the debugging information associated with a given DIE.
4747 Visits the DIE's children recursively. Updates the global
4748 variable next_die_offset, on each time through. Uses the
4749 current value of next_die_offset to update the die_offset
4750 field in each DIE. */
4753 calc_die_sizes (die)
4756 register dw_die_ref c;
4757 die->die_offset = next_die_offset;
4758 next_die_offset += size_of_die (die);
4760 for (c = die->die_child; c != NULL; c = c->die_sib)
4763 if (die->die_child != NULL)
4764 /* Count the null byte used to terminate sibling lists. */
4765 next_die_offset += 1;
4768 /* Return the size of the line information prolog generated for the
4769 compilation unit. */
4771 static unsigned long
4772 size_of_line_prolog ()
4774 register unsigned long size;
4775 register unsigned long ft_index;
4777 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4779 /* Count the size of the table giving number of args for each
4781 size += DWARF_LINE_OPCODE_BASE - 1;
4783 /* Include directory table is empty (at present). Count only the
4784 null byte used to terminate the table. */
4787 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4789 /* File name entry. */
4790 size += size_of_string (file_table[ft_index]);
4792 /* Include directory index. */
4793 size += size_of_uleb128 (0);
4795 /* Modification time. */
4796 size += size_of_uleb128 (0);
4798 /* File length in bytes. */
4799 size += size_of_uleb128 (0);
4802 /* Count the file table terminator. */
4807 /* Return the size of the line information generated for this
4808 compilation unit. */
4810 static unsigned long
4811 size_of_line_info ()
4813 register unsigned long size;
4814 register unsigned long lt_index;
4815 register unsigned long current_line;
4816 register long line_offset;
4817 register long line_delta;
4818 register unsigned long current_file;
4819 register unsigned long function;
4820 unsigned long size_of_set_address;
4822 /* Size of a DW_LNE_set_address instruction. */
4823 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4825 /* Version number. */
4828 /* Prolog length specifier. */
4829 size += DWARF_OFFSET_SIZE;
4832 size += size_of_line_prolog ();
4836 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4838 register dw_line_info_ref line_info = &line_info_table[lt_index];
4840 if (line_info->dw_line_num == current_line
4841 && line_info->dw_file_num == current_file)
4844 /* Advance pc instruction. */
4845 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4849 size += size_of_set_address;
4851 if (line_info->dw_file_num != current_file)
4853 /* Set file number instruction. */
4855 current_file = line_info->dw_file_num;
4856 size += size_of_uleb128 (current_file);
4859 if (line_info->dw_line_num != current_line)
4861 line_offset = line_info->dw_line_num - current_line;
4862 line_delta = line_offset - DWARF_LINE_BASE;
4863 current_line = line_info->dw_line_num;
4864 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4865 /* 1-byte special line number instruction. */
4869 /* Advance line instruction. */
4871 size += size_of_sleb128 (line_offset);
4872 /* Generate line entry instruction. */
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;
4890 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4892 register dw_separate_line_info_ref line_info
4893 = &separate_line_info_table[lt_index];
4895 if (line_info->dw_line_num == current_line
4896 && line_info->dw_file_num == current_file
4897 && line_info->function == function)
4900 if (function != line_info->function)
4902 function = line_info->function;
4903 /* Set address register instruction. */
4904 size += size_of_set_address;
4908 /* Advance pc instruction. */
4912 size += size_of_set_address;
4915 if (line_info->dw_file_num != current_file)
4917 /* Set file number instruction. */
4919 current_file = line_info->dw_file_num;
4920 size += size_of_uleb128 (current_file);
4923 if (line_info->dw_line_num != current_line)
4925 line_offset = line_info->dw_line_num - current_line;
4926 line_delta = line_offset - DWARF_LINE_BASE;
4927 current_line = line_info->dw_line_num;
4928 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4929 /* 1-byte special line number instruction. */
4933 /* Advance line instruction. */
4935 size += size_of_sleb128 (line_offset);
4937 /* Generate line entry instruction. */
4945 /* If we're done with a function, end its sequence. */
4946 if (lt_index == separate_line_info_table_in_use
4947 || separate_line_info_table[lt_index].function != function)
4952 /* Advance pc instruction. */
4956 size += size_of_set_address;
4958 /* End of line number info. marker. */
4959 size += 1 + size_of_uleb128 (1) + 1;
4966 /* Return the size of the .debug_pubnames table generated for the
4967 compilation unit. */
4969 static unsigned long
4972 register unsigned long size;
4973 register unsigned i;
4975 size = DWARF_PUBNAMES_HEADER_SIZE;
4976 for (i = 0; i < pubname_table_in_use; ++i)
4978 register pubname_ref p = &pubname_table[i];
4979 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4982 size += DWARF_OFFSET_SIZE;
4986 /* Return the size of the information in the .debug_aranges section. */
4988 static unsigned long
4991 register unsigned long size;
4993 size = DWARF_ARANGES_HEADER_SIZE;
4995 /* Count the address/length pair for this compilation unit. */
4996 size += 2 * PTR_SIZE;
4997 size += 2 * PTR_SIZE * arange_table_in_use;
4999 /* Count the two zero words used to terminated the address range table. */
5000 size += 2 * PTR_SIZE;
5004 /* Select the encoding of an attribute value. */
5006 static enum dwarf_form
5010 switch (v->val_class)
5012 case dw_val_class_addr:
5013 return DW_FORM_addr;
5014 case dw_val_class_loc:
5015 switch (constant_size (size_of_locs (v->v.val_loc)))
5018 return DW_FORM_block1;
5020 return DW_FORM_block2;
5024 case dw_val_class_const:
5025 return DW_FORM_data4;
5026 case dw_val_class_unsigned_const:
5027 switch (constant_size (v->v.val_unsigned))
5030 return DW_FORM_data1;
5032 return DW_FORM_data2;
5034 return DW_FORM_data4;
5036 return DW_FORM_data8;
5040 case dw_val_class_long_long:
5041 return DW_FORM_block1;
5042 case dw_val_class_float:
5043 return DW_FORM_block1;
5044 case dw_val_class_flag:
5045 return DW_FORM_flag;
5046 case dw_val_class_die_ref:
5048 case dw_val_class_fde_ref:
5049 return DW_FORM_data;
5050 case dw_val_class_lbl_id:
5051 return DW_FORM_addr;
5052 case dw_val_class_lbl_offset:
5053 return DW_FORM_data;
5054 case dw_val_class_str:
5055 return DW_FORM_string;
5061 /* Output the encoding of an attribute value. */
5064 output_value_format (v)
5067 enum dwarf_form form = value_format (v);
5069 output_uleb128 (form);
5071 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
5073 fputc ('\n', asm_out_file);
5076 /* Output the .debug_abbrev section which defines the DIE abbreviation
5080 output_abbrev_section ()
5082 unsigned long abbrev_id;
5085 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5087 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5089 output_uleb128 (abbrev_id);
5091 fprintf (asm_out_file, " (abbrev code)");
5093 fputc ('\n', asm_out_file);
5094 output_uleb128 (abbrev->die_tag);
5096 fprintf (asm_out_file, " (TAG: %s)",
5097 dwarf_tag_name (abbrev->die_tag));
5099 fputc ('\n', asm_out_file);
5100 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5101 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5104 fprintf (asm_out_file, "\t%s %s",
5106 (abbrev->die_child != NULL
5107 ? "DW_children_yes" : "DW_children_no"));
5109 fputc ('\n', asm_out_file);
5111 for (a_attr = abbrev->die_attr; a_attr != NULL;
5112 a_attr = a_attr->dw_attr_next)
5114 output_uleb128 (a_attr->dw_attr);
5116 fprintf (asm_out_file, " (%s)",
5117 dwarf_attr_name (a_attr->dw_attr));
5119 fputc ('\n', asm_out_file);
5120 output_value_format (&a_attr->dw_attr_val);
5123 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5126 /* Terminate the table. */
5127 fprintf (asm_out_file, "\t%s\t0\n", ASM_BYTE_OP);
5130 /* Output location description stack opcode's operands (if any). */
5133 output_loc_operands (loc)
5134 register dw_loc_descr_ref loc;
5136 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5137 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5139 switch (loc->dw_loc_opc)
5142 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5143 fputc ('\n', asm_out_file);
5147 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5148 fputc ('\n', asm_out_file);
5152 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5153 fputc ('\n', asm_out_file);
5157 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5158 fputc ('\n', asm_out_file);
5163 fputc ('\n', asm_out_file);
5166 output_uleb128 (val1->v.val_unsigned);
5167 fputc ('\n', asm_out_file);
5170 output_sleb128 (val1->v.val_int);
5171 fputc ('\n', asm_out_file);
5174 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5175 fputc ('\n', asm_out_file);
5177 case DW_OP_plus_uconst:
5178 output_uleb128 (val1->v.val_unsigned);
5179 fputc ('\n', asm_out_file);
5183 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5184 fputc ('\n', asm_out_file);
5218 output_sleb128 (val1->v.val_int);
5219 fputc ('\n', asm_out_file);
5222 output_uleb128 (val1->v.val_unsigned);
5223 fputc ('\n', asm_out_file);
5226 output_sleb128 (val1->v.val_int);
5227 fputc ('\n', asm_out_file);
5230 output_uleb128 (val1->v.val_unsigned);
5231 fputc ('\n', asm_out_file);
5232 output_sleb128 (val2->v.val_int);
5233 fputc ('\n', asm_out_file);
5236 output_uleb128 (val1->v.val_unsigned);
5237 fputc ('\n', asm_out_file);
5239 case DW_OP_deref_size:
5240 case DW_OP_xderef_size:
5241 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5242 fputc ('\n', asm_out_file);
5249 /* Compute the offset of a sibling. */
5251 static unsigned long
5252 sibling_offset (die)
5255 unsigned long offset;
5257 if (die->die_child_last == NULL)
5258 offset = die->die_offset + size_of_die (die);
5260 offset = sibling_offset (die->die_child_last) + 1;
5265 /* Output the DIE and its attributes. Called recursively to generate
5266 the definitions of each child DIE. */
5270 register dw_die_ref die;
5272 register dw_attr_ref a;
5273 register dw_die_ref c;
5274 register unsigned long ref_offset;
5275 register unsigned long size;
5276 register dw_loc_descr_ref loc;
5278 output_uleb128 (die->die_abbrev);
5280 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5281 die->die_offset, dwarf_tag_name (die->die_tag));
5283 fputc ('\n', asm_out_file);
5285 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5287 switch (a->dw_attr_val.val_class)
5289 case dw_val_class_addr:
5290 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5291 a->dw_attr_val.v.val_addr);
5294 case dw_val_class_loc:
5295 size = size_of_locs (a->dw_attr_val.v.val_loc);
5297 /* Output the block length for this list of location operations. */
5298 switch (constant_size (size))
5301 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5304 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5311 fprintf (asm_out_file, "\t%s %s",
5312 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5314 fputc ('\n', asm_out_file);
5315 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5316 loc = loc->dw_loc_next)
5318 /* Output the opcode. */
5319 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5321 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5322 dwarf_stack_op_name (loc->dw_loc_opc));
5324 fputc ('\n', asm_out_file);
5326 /* Output the operand(s) (if any). */
5327 output_loc_operands (loc);
5331 case dw_val_class_const:
5332 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5335 case dw_val_class_unsigned_const:
5336 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5339 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5340 a->dw_attr_val.v.val_unsigned);
5343 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5344 a->dw_attr_val.v.val_unsigned);
5347 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5348 a->dw_attr_val.v.val_unsigned);
5351 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5352 a->dw_attr_val.v.val_long_long.hi,
5353 a->dw_attr_val.v.val_long_long.low);
5360 case dw_val_class_long_long:
5361 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5363 fprintf (asm_out_file, "\t%s %s",
5364 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5366 fputc ('\n', asm_out_file);
5367 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5368 a->dw_attr_val.v.val_long_long.hi,
5369 a->dw_attr_val.v.val_long_long.low);
5372 fprintf (asm_out_file,
5373 "\t%s long long constant", ASM_COMMENT_START);
5375 fputc ('\n', asm_out_file);
5378 case dw_val_class_float:
5380 register unsigned int i;
5381 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5382 a->dw_attr_val.v.val_float.length * 4);
5384 fprintf (asm_out_file, "\t%s %s",
5385 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5387 fputc ('\n', asm_out_file);
5388 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5390 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5391 a->dw_attr_val.v.val_float.array[i]);
5393 fprintf (asm_out_file, "\t%s fp constant word %u",
5394 ASM_COMMENT_START, i);
5396 fputc ('\n', asm_out_file);
5401 case dw_val_class_flag:
5402 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5405 case dw_val_class_die_ref:
5406 if (a->dw_attr_val.v.val_die_ref != NULL)
5407 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5408 else if (a->dw_attr == DW_AT_sibling)
5409 ref_offset = sibling_offset(die);
5413 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5416 case dw_val_class_fde_ref:
5419 ASM_GENERATE_INTERNAL_LABEL
5420 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5421 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5422 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5426 case dw_val_class_lbl_id:
5427 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5430 case dw_val_class_lbl_offset:
5431 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5434 case dw_val_class_str:
5436 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5438 ASM_OUTPUT_ASCII (asm_out_file,
5439 a->dw_attr_val.v.val_str,
5440 (int) strlen (a->dw_attr_val.v.val_str) + 1);
5447 if (a->dw_attr_val.val_class != dw_val_class_loc
5448 && a->dw_attr_val.val_class != dw_val_class_long_long
5449 && a->dw_attr_val.val_class != dw_val_class_float)
5452 fprintf (asm_out_file, "\t%s %s",
5453 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5455 fputc ('\n', asm_out_file);
5459 for (c = die->die_child; c != NULL; c = c->die_sib)
5462 if (die->die_child != NULL)
5464 /* Add null byte to terminate sibling list. */
5465 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5467 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5468 ASM_COMMENT_START, die->die_offset);
5470 fputc ('\n', asm_out_file);
5474 /* Output the compilation unit that appears at the beginning of the
5475 .debug_info section, and precedes the DIE descriptions. */
5478 output_compilation_unit_header ()
5480 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5482 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5485 fputc ('\n', asm_out_file);
5486 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5488 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5490 fputc ('\n', asm_out_file);
5491 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, abbrev_section_label);
5493 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5496 fputc ('\n', asm_out_file);
5497 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5499 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5501 fputc ('\n', asm_out_file);
5504 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5505 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5506 argument list, and maybe the scope. */
5509 dwarf2_name (decl, scope)
5513 return (*decl_printable_name) (decl, scope ? 1 : 0);
5516 /* Add a new entry to .debug_pubnames if appropriate. */
5519 add_pubname (decl, die)
5525 if (! TREE_PUBLIC (decl))
5528 if (pubname_table_in_use == pubname_table_allocated)
5530 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5531 pubname_table = (pubname_ref) xrealloc
5532 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5535 p = &pubname_table[pubname_table_in_use++];
5538 p->name = xstrdup (dwarf2_name (decl, 1));
5541 /* Output the public names table used to speed up access to externally
5542 visible names. For now, only generate entries for externally
5543 visible procedures. */
5548 register unsigned i;
5549 register unsigned long pubnames_length = size_of_pubnames ();
5551 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5554 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5557 fputc ('\n', asm_out_file);
5558 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5561 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5563 fputc ('\n', asm_out_file);
5564 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5566 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5569 fputc ('\n', asm_out_file);
5570 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5572 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5574 fputc ('\n', asm_out_file);
5575 for (i = 0; i < pubname_table_in_use; ++i)
5577 register pubname_ref pub = &pubname_table[i];
5579 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5581 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5583 fputc ('\n', asm_out_file);
5587 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5588 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5592 ASM_OUTPUT_ASCII (asm_out_file, pub->name,
5593 (int) strlen (pub->name) + 1);
5596 fputc ('\n', asm_out_file);
5599 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5600 fputc ('\n', asm_out_file);
5603 /* Add a new entry to .debug_aranges if appropriate. */
5606 add_arange (decl, die)
5610 if (! DECL_SECTION_NAME (decl))
5613 if (arange_table_in_use == arange_table_allocated)
5615 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5617 = (arange_ref) xrealloc (arange_table,
5618 arange_table_allocated * sizeof (dw_die_ref));
5621 arange_table[arange_table_in_use++] = die;
5624 /* Output the information that goes into the .debug_aranges table.
5625 Namely, define the beginning and ending address range of the
5626 text section generated for this compilation unit. */
5631 register unsigned i;
5632 register unsigned long aranges_length = size_of_aranges ();
5634 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5636 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5639 fputc ('\n', asm_out_file);
5640 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5642 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5644 fputc ('\n', asm_out_file);
5645 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5647 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5650 fputc ('\n', asm_out_file);
5651 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5653 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5655 fputc ('\n', asm_out_file);
5656 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5658 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5661 fputc ('\n', asm_out_file);
5662 /* We need to align to twice the pointer size here.
5663 If DWARF_OFFSET_SIZE == 4, then we have emitted 12 bytes, and need 4
5664 bytes of padding to align for either 4 or 8 byte pointers. */
5665 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
5666 /* If DWARF_OFFSET_SIZE == 8, then we have emitted 20 bytes, and need 12
5667 bytes of padding to align for 8 byte pointers. We have already emitted
5668 4 bytes of padding, so emit 8 more here. */
5669 if (DWARF_OFFSET_SIZE == 8)
5670 fprintf (asm_out_file, ",0,0");
5673 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5674 ASM_COMMENT_START, 2 * PTR_SIZE);
5676 fputc ('\n', asm_out_file);
5677 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_section_label);
5679 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5681 fputc ('\n', asm_out_file);
5682 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5683 text_section_label);
5685 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5687 fputc ('\n', asm_out_file);
5688 for (i = 0; i < arange_table_in_use; ++i)
5690 dw_die_ref die = arange_table[i];
5692 if (die->die_tag == DW_TAG_subprogram)
5693 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (die));
5696 /* A static variable; extract the symbol from DW_AT_location.
5697 Note that this code isn't currently hit, as we only emit
5698 aranges for functions (jason 9/23/99). */
5700 dw_attr_ref a = get_AT (die, DW_AT_location);
5701 dw_loc_descr_ref loc;
5702 if (! a || a->dw_attr_val.val_class != dw_val_class_loc)
5705 loc = a->dw_attr_val.v.val_loc;
5706 if (loc->dw_loc_opc != DW_OP_addr)
5709 ASM_OUTPUT_DWARF_ADDR (asm_out_file, loc->dw_loc_oprnd1.v.val_addr);
5713 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5715 fputc ('\n', asm_out_file);
5716 if (die->die_tag == DW_TAG_subprogram)
5717 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (die),
5718 get_AT_low_pc (die));
5720 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5721 get_AT_unsigned (die, DW_AT_byte_size));
5724 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5726 fputc ('\n', asm_out_file);
5729 /* Output the terminator words. */
5730 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5731 fputc ('\n', asm_out_file);
5732 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5733 fputc ('\n', asm_out_file);
5736 /* Output the source line number correspondence information. This
5737 information goes into the .debug_line section.
5739 If the format of this data changes, then the function size_of_line_info
5740 must also be adjusted the same way. */
5745 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5746 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5747 register unsigned opc;
5748 register unsigned n_op_args;
5749 register unsigned long ft_index;
5750 register unsigned long lt_index;
5751 register unsigned long current_line;
5752 register long line_offset;
5753 register long line_delta;
5754 register unsigned long current_file;
5755 register unsigned long function;
5757 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5759 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5762 fputc ('\n', asm_out_file);
5763 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5765 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5767 fputc ('\n', asm_out_file);
5768 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5770 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5772 fputc ('\n', asm_out_file);
5773 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5775 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5778 fputc ('\n', asm_out_file);
5779 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5781 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5784 fputc ('\n', asm_out_file);
5785 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5787 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5790 fputc ('\n', asm_out_file);
5791 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5793 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5796 fputc ('\n', asm_out_file);
5797 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5799 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5801 fputc ('\n', asm_out_file);
5802 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5806 case DW_LNS_advance_pc:
5807 case DW_LNS_advance_line:
5808 case DW_LNS_set_file:
5809 case DW_LNS_set_column:
5810 case DW_LNS_fixed_advance_pc:
5817 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5819 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5820 ASM_COMMENT_START, opc, n_op_args);
5821 fputc ('\n', asm_out_file);
5825 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5827 /* Include directory table is empty, at present */
5828 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5829 fputc ('\n', asm_out_file);
5831 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5833 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5837 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5838 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5839 ASM_COMMENT_START, ft_index);
5843 ASM_OUTPUT_ASCII (asm_out_file,
5844 file_table[ft_index],
5845 (int) strlen (file_table[ft_index]) + 1);
5848 fputc ('\n', asm_out_file);
5850 /* Include directory index */
5852 fputc ('\n', asm_out_file);
5854 /* Modification time */
5856 fputc ('\n', asm_out_file);
5858 /* File length in bytes */
5860 fputc ('\n', asm_out_file);
5863 /* Terminate the file name table */
5864 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5865 fputc ('\n', asm_out_file);
5867 /* We used to set the address register to the first location in the text
5868 section here, but that didn't accomplish anything since we already
5869 have a line note for the opening brace of the first function. */
5871 /* Generate the line number to PC correspondence table, encoded as
5872 a series of state machine operations. */
5875 strcpy (prev_line_label, text_section_label);
5876 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5878 register dw_line_info_ref line_info = &line_info_table[lt_index];
5880 /* Don't emit anything for redundant notes. Just updating the
5881 address doesn't accomplish anything, because we already assume
5882 that anything after the last address is this line. */
5883 if (line_info->dw_line_num == current_line
5884 && line_info->dw_file_num == current_file)
5887 /* Emit debug info for the address of the current line, choosing
5888 the encoding that uses the least amount of space. */
5889 /* ??? Unfortunately, we have little choice here currently, and must
5890 always use the most general form. Gcc does not know the address
5891 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5892 dwarf2 aware assemblers at this time, so we can't use any special
5893 pseudo ops that would allow the assembler to optimally encode this for
5894 us. Many ports do have length attributes which will give an upper
5895 bound on the address range. We could perhaps use length attributes
5896 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5897 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5900 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5901 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5903 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5906 fputc ('\n', asm_out_file);
5907 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5908 fputc ('\n', asm_out_file);
5912 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5913 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5915 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5917 fputc ('\n', asm_out_file);
5918 output_uleb128 (1 + PTR_SIZE);
5919 fputc ('\n', asm_out_file);
5920 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5921 fputc ('\n', asm_out_file);
5922 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5923 fputc ('\n', asm_out_file);
5925 strcpy (prev_line_label, line_label);
5927 /* Emit debug info for the source file of the current line, if
5928 different from the previous line. */
5929 if (line_info->dw_file_num != current_file)
5931 current_file = line_info->dw_file_num;
5932 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5934 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5936 fputc ('\n', asm_out_file);
5937 output_uleb128 (current_file);
5939 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5941 fputc ('\n', asm_out_file);
5944 /* Emit debug info for the current line number, choosing the encoding
5945 that uses the least amount of space. */
5946 if (line_info->dw_line_num != current_line)
5948 line_offset = line_info->dw_line_num - current_line;
5949 line_delta = line_offset - DWARF_LINE_BASE;
5950 current_line = line_info->dw_line_num;
5951 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5953 /* This can handle deltas from -10 to 234, using the current
5954 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5956 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5957 DWARF_LINE_OPCODE_BASE + line_delta);
5959 fprintf (asm_out_file,
5960 "\t%s line %ld", ASM_COMMENT_START, current_line);
5962 fputc ('\n', asm_out_file);
5966 /* This can handle any delta. This takes at least 4 bytes,
5967 depending on the value being encoded. */
5968 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5970 fprintf (asm_out_file, "\t%s advance to line %ld",
5971 ASM_COMMENT_START, current_line);
5973 fputc ('\n', asm_out_file);
5974 output_sleb128 (line_offset);
5975 fputc ('\n', asm_out_file);
5976 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5978 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
5979 fputc ('\n', asm_out_file);
5984 /* We still need to start a new row, so output a copy insn. */
5985 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5987 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
5988 fputc ('\n', asm_out_file);
5992 /* Emit debug info for the address of the end of the function. */
5995 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5997 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6000 fputc ('\n', asm_out_file);
6001 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
6002 fputc ('\n', asm_out_file);
6006 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6008 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
6009 fputc ('\n', asm_out_file);
6010 output_uleb128 (1 + PTR_SIZE);
6011 fputc ('\n', asm_out_file);
6012 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6013 fputc ('\n', asm_out_file);
6014 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
6015 fputc ('\n', asm_out_file);
6018 /* Output the marker for the end of the line number info. */
6019 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6021 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
6023 fputc ('\n', asm_out_file);
6025 fputc ('\n', asm_out_file);
6026 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6027 fputc ('\n', asm_out_file);
6032 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
6034 register dw_separate_line_info_ref line_info
6035 = &separate_line_info_table[lt_index];
6037 /* Don't emit anything for redundant notes. */
6038 if (line_info->dw_line_num == current_line
6039 && line_info->dw_file_num == current_file
6040 && line_info->function == function)
6043 /* Emit debug info for the address of the current line. If this is
6044 a new function, or the first line of a function, then we need
6045 to handle it differently. */
6046 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
6048 if (function != line_info->function)
6050 function = line_info->function;
6052 /* Set the address register to the first line in the function */
6053 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6055 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6058 fputc ('\n', asm_out_file);
6059 output_uleb128 (1 + PTR_SIZE);
6060 fputc ('\n', asm_out_file);
6061 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6062 fputc ('\n', asm_out_file);
6063 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6064 fputc ('\n', asm_out_file);
6068 /* ??? See the DW_LNS_advance_pc comment above. */
6071 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6073 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6076 fputc ('\n', asm_out_file);
6077 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6079 fputc ('\n', asm_out_file);
6083 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6085 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6087 fputc ('\n', asm_out_file);
6088 output_uleb128 (1 + PTR_SIZE);
6089 fputc ('\n', asm_out_file);
6090 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6091 fputc ('\n', asm_out_file);
6092 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6093 fputc ('\n', asm_out_file);
6096 strcpy (prev_line_label, line_label);
6098 /* Emit debug info for the source file of the current line, if
6099 different from the previous line. */
6100 if (line_info->dw_file_num != current_file)
6102 current_file = line_info->dw_file_num;
6103 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
6105 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
6107 fputc ('\n', asm_out_file);
6108 output_uleb128 (current_file);
6110 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
6112 fputc ('\n', asm_out_file);
6115 /* Emit debug info for the current line number, choosing the encoding
6116 that uses the least amount of space. */
6117 if (line_info->dw_line_num != current_line)
6119 line_offset = line_info->dw_line_num - current_line;
6120 line_delta = line_offset - DWARF_LINE_BASE;
6121 current_line = line_info->dw_line_num;
6122 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6124 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6125 DWARF_LINE_OPCODE_BASE + line_delta);
6127 fprintf (asm_out_file,
6128 "\t%s line %ld", ASM_COMMENT_START, current_line);
6130 fputc ('\n', asm_out_file);
6134 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6136 fprintf (asm_out_file, "\t%s advance to line %ld",
6137 ASM_COMMENT_START, current_line);
6139 fputc ('\n', asm_out_file);
6140 output_sleb128 (line_offset);
6141 fputc ('\n', asm_out_file);
6142 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6144 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6145 fputc ('\n', asm_out_file);
6150 /* We still need to start a new row, so output a copy insn. */
6151 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6153 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6154 fputc ('\n', asm_out_file);
6160 /* If we're done with a function, end its sequence. */
6161 if (lt_index == separate_line_info_table_in_use
6162 || separate_line_info_table[lt_index].function != function)
6167 /* Emit debug info for the address of the end of the function. */
6168 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6171 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6173 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6176 fputc ('\n', asm_out_file);
6177 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6179 fputc ('\n', asm_out_file);
6183 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6185 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6187 fputc ('\n', asm_out_file);
6188 output_uleb128 (1 + PTR_SIZE);
6189 fputc ('\n', asm_out_file);
6190 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6191 fputc ('\n', asm_out_file);
6192 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6193 fputc ('\n', asm_out_file);
6196 /* Output the marker for the end of this sequence. */
6197 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6199 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6202 fputc ('\n', asm_out_file);
6204 fputc ('\n', asm_out_file);
6205 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6206 fputc ('\n', asm_out_file);
6211 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6212 in question represents the outermost pair of curly braces (i.e. the "body
6213 block") of a function or method.
6215 For any BLOCK node representing a "body block" of a function or method, the
6216 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6217 represents the outermost (function) scope for the function or method (i.e.
6218 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6219 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6222 is_body_block (stmt)
6225 if (TREE_CODE (stmt) == BLOCK)
6227 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6229 if (TREE_CODE (parent) == BLOCK)
6231 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6233 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6241 /* Given a pointer to a tree node for some base type, return a pointer to
6242 a DIE that describes the given type.
6244 This routine must only be called for GCC type nodes that correspond to
6245 Dwarf base (fundamental) types. */
6248 base_type_die (type)
6251 register dw_die_ref base_type_result;
6252 register char *type_name;
6253 register enum dwarf_type encoding;
6254 register tree name = TYPE_NAME (type);
6256 if (TREE_CODE (type) == ERROR_MARK
6257 || TREE_CODE (type) == VOID_TYPE)
6262 if (TREE_CODE (name) == TYPE_DECL)
6263 name = DECL_NAME (name);
6265 type_name = IDENTIFIER_POINTER (name);
6268 type_name = "__unknown__";
6270 switch (TREE_CODE (type))
6273 /* Carefully distinguish the C character types, without messing
6274 up if the language is not C. Note that we check only for the names
6275 that contain spaces; other names might occur by coincidence in other
6277 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6278 && (type == char_type_node
6279 || ! strcmp (type_name, "signed char")
6280 || ! strcmp (type_name, "unsigned char"))))
6282 if (TREE_UNSIGNED (type))
6283 encoding = DW_ATE_unsigned;
6285 encoding = DW_ATE_signed;
6288 /* else fall through */
6291 /* GNU Pascal/Ada CHAR type. Not used in C. */
6292 if (TREE_UNSIGNED (type))
6293 encoding = DW_ATE_unsigned_char;
6295 encoding = DW_ATE_signed_char;
6299 encoding = DW_ATE_float;
6302 /* Dwarf2 doesn't know anything about complex ints, so use
6303 a user defined type for it. */
6305 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
6306 encoding = DW_ATE_complex_float;
6308 encoding = DW_ATE_lo_user;
6312 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6313 encoding = DW_ATE_boolean;
6317 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6320 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6321 add_AT_string (base_type_result, DW_AT_name, type_name);
6322 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6323 int_size_in_bytes (type));
6324 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6326 return base_type_result;
6329 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6330 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6331 a given type is generally the same as the given type, except that if the
6332 given type is a pointer or reference type, then the root type of the given
6333 type is the root type of the "basis" type for the pointer or reference
6334 type. (This definition of the "root" type is recursive.) Also, the root
6335 type of a `const' qualified type or a `volatile' qualified type is the
6336 root type of the given type without the qualifiers. */
6342 if (TREE_CODE (type) == ERROR_MARK)
6343 return error_mark_node;
6345 switch (TREE_CODE (type))
6348 return error_mark_node;
6351 case REFERENCE_TYPE:
6352 return type_main_variant (root_type (TREE_TYPE (type)));
6355 return type_main_variant (type);
6359 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6360 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6366 switch (TREE_CODE (type))
6381 case QUAL_UNION_TYPE:
6386 case REFERENCE_TYPE:
6399 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6400 entry that chains various modifiers in front of the given type. */
6403 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6405 register int is_const_type;
6406 register int is_volatile_type;
6407 register dw_die_ref context_die;
6409 register enum tree_code code = TREE_CODE (type);
6410 register dw_die_ref mod_type_die = NULL;
6411 register dw_die_ref sub_die = NULL;
6412 register tree item_type = NULL;
6414 if (code != ERROR_MARK)
6416 type = build_type_variant (type, is_const_type, is_volatile_type);
6418 mod_type_die = lookup_type_die (type);
6420 return mod_type_die;
6422 /* Handle C typedef types. */
6423 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6424 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6426 tree dtype = TREE_TYPE (TYPE_NAME (type));
6429 /* For a named type, use the typedef. */
6430 gen_type_die (type, context_die);
6431 mod_type_die = lookup_type_die (type);
6434 else if (is_const_type < TYPE_READONLY (dtype)
6435 || is_volatile_type < TYPE_VOLATILE (dtype))
6436 /* cv-unqualified version of named type. Just use the unnamed
6437 type to which it refers. */
6439 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6440 is_const_type, is_volatile_type,
6442 /* Else cv-qualified version of named type; fall through. */
6447 else if (is_const_type)
6449 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6450 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6452 else if (is_volatile_type)
6454 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6455 sub_die = modified_type_die (type, 0, 0, context_die);
6457 else if (code == POINTER_TYPE)
6459 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6460 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6462 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6464 item_type = TREE_TYPE (type);
6466 else if (code == REFERENCE_TYPE)
6468 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6469 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6471 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6473 item_type = TREE_TYPE (type);
6475 else if (is_base_type (type))
6476 mod_type_die = base_type_die (type);
6479 gen_type_die (type, context_die);
6481 /* We have to get the type_main_variant here (and pass that to the
6482 `lookup_type_die' routine) because the ..._TYPE node we have
6483 might simply be a *copy* of some original type node (where the
6484 copy was created to help us keep track of typedef names) and
6485 that copy might have a different TYPE_UID from the original
6487 mod_type_die = lookup_type_die (type_main_variant (type));
6488 if (mod_type_die == NULL)
6493 equate_type_number_to_die (type, mod_type_die);
6495 /* We must do this after the equate_type_number_to_die call, in case
6496 this is a recursive type. This ensures that the modified_type_die
6497 recursion will terminate even if the type is recursive. Recursive
6498 types are possible in Ada. */
6499 sub_die = modified_type_die (item_type,
6500 TYPE_READONLY (item_type),
6501 TYPE_VOLATILE (item_type),
6504 if (sub_die != NULL)
6505 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6507 return mod_type_die;
6510 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6511 an enumerated type. */
6517 return TREE_CODE (type) == ENUMERAL_TYPE;
6520 /* Return a location descriptor that designates a machine register. */
6522 static dw_loc_descr_ref
6523 reg_loc_descriptor (rtl)
6526 register dw_loc_descr_ref loc_result = NULL;
6527 register unsigned reg = reg_number (rtl);
6530 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6532 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6537 /* Return a location descriptor that designates a base+offset location. */
6539 static dw_loc_descr_ref
6540 based_loc_descr (reg, offset)
6544 register dw_loc_descr_ref loc_result;
6545 /* For the "frame base", we use the frame pointer or stack pointer
6546 registers, since the RTL for local variables is relative to one of
6548 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6549 ? HARD_FRAME_POINTER_REGNUM
6550 : STACK_POINTER_REGNUM);
6553 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6555 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6557 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6562 /* Return true if this RTL expression describes a base+offset calculation. */
6568 return (GET_CODE (rtl) == PLUS
6569 && ((GET_CODE (XEXP (rtl, 0)) == REG
6570 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6573 /* The following routine converts the RTL for a variable or parameter
6574 (resident in memory) into an equivalent Dwarf representation of a
6575 mechanism for getting the address of that same variable onto the top of a
6576 hypothetical "address evaluation" stack.
6578 When creating memory location descriptors, we are effectively transforming
6579 the RTL for a memory-resident object into its Dwarf postfix expression
6580 equivalent. This routine recursively descends an RTL tree, turning
6581 it into Dwarf postfix code as it goes.
6583 MODE is the mode of the memory reference, needed to handle some
6584 autoincrement addressing modes. */
6586 static dw_loc_descr_ref
6587 mem_loc_descriptor (rtl, mode)
6589 enum machine_mode mode;
6591 dw_loc_descr_ref mem_loc_result = NULL;
6592 /* Note that for a dynamically sized array, the location we will generate a
6593 description of here will be the lowest numbered location which is
6594 actually within the array. That's *not* necessarily the same as the
6595 zeroth element of the array. */
6597 switch (GET_CODE (rtl))
6601 /* POST_INC and POST_DEC can be handled just like a SUBREG. So we
6602 just fall into the SUBREG code. */
6604 /* ... fall through ... */
6607 /* The case of a subreg may arise when we have a local (register)
6608 variable or a formal (register) parameter which doesn't quite fill
6609 up an entire register. For now, just assume that it is
6610 legitimate to make the Dwarf info refer to the whole register which
6611 contains the given subreg. */
6612 rtl = XEXP (rtl, 0);
6614 /* ... fall through ... */
6617 /* Whenever a register number forms a part of the description of the
6618 method for calculating the (dynamic) address of a memory resident
6619 object, DWARF rules require the register number be referred to as
6620 a "base register". This distinction is not based in any way upon
6621 what category of register the hardware believes the given register
6622 belongs to. This is strictly DWARF terminology we're dealing with
6623 here. Note that in cases where the location of a memory-resident
6624 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6625 OP_CONST (0)) the actual DWARF location descriptor that we generate
6626 may just be OP_BASEREG (basereg). This may look deceptively like
6627 the object in question was allocated to a register (rather than in
6628 memory) so DWARF consumers need to be aware of the subtle
6629 distinction between OP_REG and OP_BASEREG. */
6630 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6634 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode);
6635 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6639 /* Some ports can transform a symbol ref into a label ref, because
6640 the symbol ref is too far away and has to be dumped into a constant
6644 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6645 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6646 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6651 /* Turn these into a PLUS expression and fall into the PLUS code
6653 rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0),
6654 GEN_INT (GET_CODE (rtl) == PRE_INC
6655 ? GET_MODE_UNIT_SIZE (mode)
6656 : - GET_MODE_UNIT_SIZE (mode)));
6658 /* ... fall through ... */
6661 if (is_based_loc (rtl))
6662 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6663 INTVAL (XEXP (rtl, 1)));
6666 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0),
6668 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1),
6670 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6675 /* If a pseudo-reg is optimized away, it is possible for it to
6676 be replaced with a MEM containing a multiply. */
6677 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0), mode));
6678 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1), mode));
6679 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6683 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6690 return mem_loc_result;
6693 /* Return a descriptor that describes the concatenation of two locations.
6694 This is typically a complex variable. */
6696 static dw_loc_descr_ref
6697 concat_loc_descriptor (x0, x1)
6698 register rtx x0, x1;
6700 dw_loc_descr_ref cc_loc_result = NULL;
6702 if (!is_pseudo_reg (x0)
6703 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6704 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6705 add_loc_descr (&cc_loc_result,
6706 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6708 if (!is_pseudo_reg (x1)
6709 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6710 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6711 add_loc_descr (&cc_loc_result,
6712 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6714 return cc_loc_result;
6717 /* Output a proper Dwarf location descriptor for a variable or parameter
6718 which is either allocated in a register or in a memory location. For a
6719 register, we just generate an OP_REG and the register number. For a
6720 memory location we provide a Dwarf postfix expression describing how to
6721 generate the (dynamic) address of the object onto the address stack. */
6723 static dw_loc_descr_ref
6724 loc_descriptor (rtl)
6727 dw_loc_descr_ref loc_result = NULL;
6728 switch (GET_CODE (rtl))
6731 /* The case of a subreg may arise when we have a local (register)
6732 variable or a formal (register) parameter which doesn't quite fill
6733 up an entire register. For now, just assume that it is
6734 legitimate to make the Dwarf info refer to the whole register which
6735 contains the given subreg. */
6736 rtl = XEXP (rtl, 0);
6738 /* ... fall through ... */
6741 loc_result = reg_loc_descriptor (rtl);
6745 loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl));
6749 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6759 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6760 which is not less than the value itself. */
6762 static inline unsigned
6763 ceiling (value, boundary)
6764 register unsigned value;
6765 register unsigned boundary;
6767 return (((value + boundary - 1) / boundary) * boundary);
6770 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6771 pointer to the declared type for the relevant field variable, or return
6772 `integer_type_node' if the given node turns out to be an
6781 if (TREE_CODE (decl) == ERROR_MARK)
6782 return integer_type_node;
6784 type = DECL_BIT_FIELD_TYPE (decl);
6785 if (type == NULL_TREE)
6786 type = TREE_TYPE (decl);
6791 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6792 node, return the alignment in bits for the type, or else return
6793 BITS_PER_WORD if the node actually turns out to be an
6796 static inline unsigned
6797 simple_type_align_in_bits (type)
6800 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6803 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6804 node, return the size in bits for the type if it is a constant, or else
6805 return the alignment for the type if the type's size is not constant, or
6806 else return BITS_PER_WORD if the type actually turns out to be an
6809 static inline unsigned
6810 simple_type_size_in_bits (type)
6813 if (TREE_CODE (type) == ERROR_MARK)
6814 return BITS_PER_WORD;
6817 register tree type_size_tree = TYPE_SIZE (type);
6819 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6820 return TYPE_ALIGN (type);
6822 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6826 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6827 return the byte offset of the lowest addressed byte of the "containing
6828 object" for the given FIELD_DECL, or return 0 if we are unable to
6829 determine what that offset is, either because the argument turns out to
6830 be a pointer to an ERROR_MARK node, or because the offset is actually
6831 variable. (We can't handle the latter case just yet). */
6834 field_byte_offset (decl)
6837 register unsigned type_align_in_bytes;
6838 register unsigned type_align_in_bits;
6839 register unsigned type_size_in_bits;
6840 register unsigned object_offset_in_align_units;
6841 register unsigned object_offset_in_bits;
6842 register unsigned object_offset_in_bytes;
6844 register tree bitpos_tree;
6845 register tree field_size_tree;
6846 register unsigned bitpos_int;
6847 register unsigned deepest_bitpos;
6848 register unsigned field_size_in_bits;
6850 if (TREE_CODE (decl) == ERROR_MARK)
6853 if (TREE_CODE (decl) != FIELD_DECL)
6856 type = field_type (decl);
6858 bitpos_tree = DECL_FIELD_BITPOS (decl);
6859 field_size_tree = DECL_SIZE (decl);
6861 /* We cannot yet cope with fields whose positions or sizes are variable, so
6862 for now, when we see such things, we simply return 0. Someday, we may
6863 be able to handle such cases, but it will be damn difficult. */
6864 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6866 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6868 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6871 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6872 type_size_in_bits = simple_type_size_in_bits (type);
6873 type_align_in_bits = simple_type_align_in_bits (type);
6874 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6876 /* Note that the GCC front-end doesn't make any attempt to keep track of
6877 the starting bit offset (relative to the start of the containing
6878 structure type) of the hypothetical "containing object" for a bit-
6879 field. Thus, when computing the byte offset value for the start of the
6880 "containing object" of a bit-field, we must deduce this information on
6881 our own. This can be rather tricky to do in some cases. For example,
6882 handling the following structure type definition when compiling for an
6883 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6886 struct S { int field1; long long field2:31; };
6888 Fortunately, there is a simple rule-of-thumb which can be
6889 used in such cases. When compiling for an i386/i486, GCC will allocate
6890 8 bytes for the structure shown above. It decides to do this based upon
6891 one simple rule for bit-field allocation. Quite simply, GCC allocates
6892 each "containing object" for each bit-field at the first (i.e. lowest
6893 addressed) legitimate alignment boundary (based upon the required
6894 minimum alignment for the declared type of the field) which it can
6895 possibly use, subject to the condition that there is still enough
6896 available space remaining in the containing object (when allocated at
6897 the selected point) to fully accommodate all of the bits of the
6898 bit-field itself. This simple rule makes it obvious why GCC allocates
6899 8 bytes for each object of the structure type shown above. When looking
6900 for a place to allocate the "containing object" for `field2', the
6901 compiler simply tries to allocate a 64-bit "containing object" at each
6902 successive 32-bit boundary (starting at zero) until it finds a place to
6903 allocate that 64- bit field such that at least 31 contiguous (and
6904 previously unallocated) bits remain within that selected 64 bit field.
6905 (As it turns out, for the example above, the compiler finds that it is
6906 OK to allocate the "containing object" 64-bit field at bit-offset zero
6907 within the structure type.) Here we attempt to work backwards from the
6908 limited set of facts we're given, and we try to deduce from those facts,
6909 where GCC must have believed that the containing object started (within
6910 the structure type). The value we deduce is then used (by the callers of
6911 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6912 for fields (both bit-fields and, in the case of DW_AT_location, regular
6915 /* Figure out the bit-distance from the start of the structure to the
6916 "deepest" bit of the bit-field. */
6917 deepest_bitpos = bitpos_int + field_size_in_bits;
6919 /* This is the tricky part. Use some fancy footwork to deduce where the
6920 lowest addressed bit of the containing object must be. */
6921 object_offset_in_bits
6922 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6924 /* Compute the offset of the containing object in "alignment units". */
6925 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6927 /* Compute the offset of the containing object in bytes. */
6928 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6930 return object_offset_in_bytes;
6933 /* The following routines define various Dwarf attributes and any data
6934 associated with them. */
6936 /* Add a location description attribute value to a DIE.
6938 This emits location attributes suitable for whole variables and
6939 whole parameters. Note that the location attributes for struct fields are
6940 generated by the routine `data_member_location_attribute' below. */
6943 add_AT_location_description (die, attr_kind, rtl)
6945 enum dwarf_attribute attr_kind;
6948 /* Handle a special case. If we are about to output a location descriptor
6949 for a variable or parameter which has been optimized out of existence,
6950 don't do that. A variable which has been optimized out
6951 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6952 Currently, in some rare cases, variables can have DECL_RTL values which
6953 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6954 elsewhere in the compiler. We treat such cases as if the variable(s) in
6955 question had been optimized out of existence. */
6957 if (is_pseudo_reg (rtl)
6958 || (GET_CODE (rtl) == MEM
6959 && is_pseudo_reg (XEXP (rtl, 0)))
6960 || (GET_CODE (rtl) == CONCAT
6961 && is_pseudo_reg (XEXP (rtl, 0))
6962 && is_pseudo_reg (XEXP (rtl, 1))))
6965 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6968 /* Attach the specialized form of location attribute used for data
6969 members of struct and union types. In the special case of a
6970 FIELD_DECL node which represents a bit-field, the "offset" part
6971 of this special location descriptor must indicate the distance
6972 in bytes from the lowest-addressed byte of the containing struct
6973 or union type to the lowest-addressed byte of the "containing
6974 object" for the bit-field. (See the `field_byte_offset' function
6975 above).. For any given bit-field, the "containing object" is a
6976 hypothetical object (of some integral or enum type) within which
6977 the given bit-field lives. The type of this hypothetical
6978 "containing object" is always the same as the declared type of
6979 the individual bit-field itself (for GCC anyway... the DWARF
6980 spec doesn't actually mandate this). Note that it is the size
6981 (in bytes) of the hypothetical "containing object" which will
6982 be given in the DW_AT_byte_size attribute for this bit-field.
6983 (See the `byte_size_attribute' function below.) It is also used
6984 when calculating the value of the DW_AT_bit_offset attribute.
6985 (See the `bit_offset_attribute' function below). */
6988 add_data_member_location_attribute (die, decl)
6989 register dw_die_ref die;
6992 register unsigned long offset;
6993 register dw_loc_descr_ref loc_descr;
6994 register enum dwarf_location_atom op;
6996 if (TREE_CODE (decl) == TREE_VEC)
6997 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6999 offset = field_byte_offset (decl);
7001 /* The DWARF2 standard says that we should assume that the structure address
7002 is already on the stack, so we can specify a structure field address
7003 by using DW_OP_plus_uconst. */
7005 #ifdef MIPS_DEBUGGING_INFO
7006 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
7007 correctly. It works only if we leave the offset on the stack. */
7010 op = DW_OP_plus_uconst;
7013 loc_descr = new_loc_descr (op, offset, 0);
7014 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
7017 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
7018 does not have a "location" either in memory or in a register. These
7019 things can arise in GNU C when a constant is passed as an actual parameter
7020 to an inlined function. They can also arise in C++ where declared
7021 constants do not necessarily get memory "homes". */
7024 add_const_value_attribute (die, rtl)
7025 register dw_die_ref die;
7028 switch (GET_CODE (rtl))
7031 /* Note that a CONST_INT rtx could represent either an integer or a
7032 floating-point constant. A CONST_INT is used whenever the constant
7033 will fit into a single word. In all such cases, the original mode
7034 of the constant value is wiped out, and the CONST_INT rtx is
7035 assigned VOIDmode. */
7036 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
7040 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
7041 floating-point constant. A CONST_DOUBLE is used whenever the
7042 constant requires more than one word in order to be adequately
7043 represented. We output CONST_DOUBLEs as blocks. */
7045 register enum machine_mode mode = GET_MODE (rtl);
7047 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
7049 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
7053 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
7057 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
7061 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
7066 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
7073 add_AT_float (die, DW_AT_const_value, length, array);
7076 add_AT_long_long (die, DW_AT_const_value,
7077 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
7082 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
7088 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
7092 /* In cases where an inlined instance of an inline function is passed
7093 the address of an `auto' variable (which is local to the caller) we
7094 can get a situation where the DECL_RTL of the artificial local
7095 variable (for the inlining) which acts as a stand-in for the
7096 corresponding formal parameter (of the inline function) will look
7097 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
7098 exactly a compile-time constant expression, but it isn't the address
7099 of the (artificial) local variable either. Rather, it represents the
7100 *value* which the artificial local variable always has during its
7101 lifetime. We currently have no way to represent such quasi-constant
7102 values in Dwarf, so for now we just punt and generate nothing. */
7106 /* No other kinds of rtx should be possible here. */
7112 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
7113 data attribute for a variable or a parameter. We generate the
7114 DW_AT_const_value attribute only in those cases where the given variable
7115 or parameter does not have a true "location" either in memory or in a
7116 register. This can happen (for example) when a constant is passed as an
7117 actual argument in a call to an inline function. (It's possible that
7118 these things can crop up in other ways also.) Note that one type of
7119 constant value which can be passed into an inlined function is a constant
7120 pointer. This can happen for example if an actual argument in an inlined
7121 function call evaluates to a compile-time constant address. */
7124 add_location_or_const_value_attribute (die, decl)
7125 register dw_die_ref die;
7129 register tree declared_type;
7130 register tree passed_type;
7132 if (TREE_CODE (decl) == ERROR_MARK)
7135 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
7138 /* Here we have to decide where we are going to say the parameter "lives"
7139 (as far as the debugger is concerned). We only have a couple of
7140 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
7142 DECL_RTL normally indicates where the parameter lives during most of the
7143 activation of the function. If optimization is enabled however, this
7144 could be either NULL or else a pseudo-reg. Both of those cases indicate
7145 that the parameter doesn't really live anywhere (as far as the code
7146 generation parts of GCC are concerned) during most of the function's
7147 activation. That will happen (for example) if the parameter is never
7148 referenced within the function.
7150 We could just generate a location descriptor here for all non-NULL
7151 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
7152 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
7153 where DECL_RTL is NULL or is a pseudo-reg.
7155 Note however that we can only get away with using DECL_INCOMING_RTL as
7156 a backup substitute for DECL_RTL in certain limited cases. In cases
7157 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7158 we can be sure that the parameter was passed using the same type as it is
7159 declared to have within the function, and that its DECL_INCOMING_RTL
7160 points us to a place where a value of that type is passed.
7162 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7163 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7164 because in these cases DECL_INCOMING_RTL points us to a value of some
7165 type which is *different* from the type of the parameter itself. Thus,
7166 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7167 such cases, the debugger would end up (for example) trying to fetch a
7168 `float' from a place which actually contains the first part of a
7169 `double'. That would lead to really incorrect and confusing
7170 output at debug-time.
7172 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7173 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7174 are a couple of exceptions however. On little-endian machines we can
7175 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7176 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7177 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7178 when (on a little-endian machine) a non-prototyped function has a
7179 parameter declared to be of type `short' or `char'. In such cases,
7180 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7181 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7182 passed `int' value. If the debugger then uses that address to fetch
7183 a `short' or a `char' (on a little-endian machine) the result will be
7184 the correct data, so we allow for such exceptional cases below.
7186 Note that our goal here is to describe the place where the given formal
7187 parameter lives during most of the function's activation (i.e. between
7188 the end of the prologue and the start of the epilogue). We'll do that
7189 as best as we can. Note however that if the given formal parameter is
7190 modified sometime during the execution of the function, then a stack
7191 backtrace (at debug-time) will show the function as having been
7192 called with the *new* value rather than the value which was
7193 originally passed in. This happens rarely enough that it is not
7194 a major problem, but it *is* a problem, and I'd like to fix it.
7196 A future version of dwarf2out.c may generate two additional
7197 attributes for any given DW_TAG_formal_parameter DIE which will
7198 describe the "passed type" and the "passed location" for the
7199 given formal parameter in addition to the attributes we now
7200 generate to indicate the "declared type" and the "active
7201 location" for each parameter. This additional set of attributes
7202 could be used by debuggers for stack backtraces. Separately, note
7203 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7204 NULL also. This happens (for example) for inlined-instances of
7205 inline function formal parameters which are never referenced.
7206 This really shouldn't be happening. All PARM_DECL nodes should
7207 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7208 doesn't currently generate these values for inlined instances of
7209 inline function parameters, so when we see such cases, we are
7210 just out-of-luck for the time being (until integrate.c
7213 /* Use DECL_RTL as the "location" unless we find something better. */
7214 rtl = DECL_RTL (decl);
7216 if (TREE_CODE (decl) == PARM_DECL)
7218 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7220 declared_type = type_main_variant (TREE_TYPE (decl));
7221 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7223 /* This decl represents a formal parameter which was optimized out.
7224 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7225 all* cases where (rtl == NULL_RTX) just below. */
7226 if (declared_type == passed_type)
7227 rtl = DECL_INCOMING_RTL (decl);
7228 else if (! BYTES_BIG_ENDIAN
7229 && TREE_CODE (declared_type) == INTEGER_TYPE
7230 && (GET_MODE_SIZE (TYPE_MODE (declared_type))
7231 <= GET_MODE_SIZE (TYPE_MODE (passed_type))))
7232 rtl = DECL_INCOMING_RTL (decl);
7235 /* If the parm was passed in registers, but lives on the stack, then
7236 make a big endian correction if the mode of the type of the
7237 parameter is not the same as the mode of the rtl. */
7238 /* ??? This is the same series of checks that are made in dbxout.c before
7239 we reach the big endian correction code there. It isn't clear if all
7240 of these checks are necessary here, but keeping them all is the safe
7242 else if (GET_CODE (rtl) == MEM
7243 && XEXP (rtl, 0) != const0_rtx
7244 && ! CONSTANT_P (XEXP (rtl, 0))
7245 /* Not passed in memory. */
7246 && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM
7247 /* Not passed by invisible reference. */
7248 && (GET_CODE (XEXP (rtl, 0)) != REG
7249 || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM
7250 || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM
7251 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
7252 || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM
7255 /* Big endian correction check. */
7257 && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl)
7258 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))
7261 int offset = (UNITS_PER_WORD
7262 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))));
7263 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
7264 plus_constant (XEXP (rtl, 0), offset));
7268 if (rtl == NULL_RTX)
7271 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7272 #ifdef LEAF_REG_REMAP
7273 if (current_function_uses_only_leaf_regs)
7274 leaf_renumber_regs_insn (rtl);
7277 switch (GET_CODE (rtl))
7280 /* The address of a variable that was optimized away; don't emit
7291 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7292 add_const_value_attribute (die, rtl);
7299 add_AT_location_description (die, DW_AT_location, rtl);
7307 /* Generate an DW_AT_name attribute given some string value to be included as
7308 the value of the attribute. */
7311 add_name_attribute (die, name_string)
7312 register dw_die_ref die;
7313 register const char *name_string;
7315 if (name_string != NULL && *name_string != 0)
7316 add_AT_string (die, DW_AT_name, name_string);
7319 /* Given a tree node describing an array bound (either lower or upper) output
7320 a representation for that bound. */
7323 add_bound_info (subrange_die, bound_attr, bound)
7324 register dw_die_ref subrange_die;
7325 register enum dwarf_attribute bound_attr;
7326 register tree bound;
7328 register unsigned bound_value = 0;
7330 /* If this is an Ada unconstrained array type, then don't emit any debug
7331 info because the array bounds are unknown. They are parameterized when
7332 the type is instantiated. */
7333 if (contains_placeholder_p (bound))
7336 switch (TREE_CODE (bound))
7341 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7343 bound_value = TREE_INT_CST_LOW (bound);
7344 if (bound_attr == DW_AT_lower_bound
7345 && ((is_c_family () && bound_value == 0)
7346 || (is_fortran () && bound_value == 1)))
7347 /* use the default */;
7349 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7354 case NON_LVALUE_EXPR:
7355 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7359 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7360 access the upper bound values may be bogus. If they refer to a
7361 register, they may only describe how to get at these values at the
7362 points in the generated code right after they have just been
7363 computed. Worse yet, in the typical case, the upper bound values
7364 will not even *be* computed in the optimized code (though the
7365 number of elements will), so these SAVE_EXPRs are entirely
7366 bogus. In order to compensate for this fact, we check here to see
7367 if optimization is enabled, and if so, we don't add an attribute
7368 for the (unknown and unknowable) upper bound. This should not
7369 cause too much trouble for existing (stupid?) debuggers because
7370 they have to deal with empty upper bounds location descriptions
7371 anyway in order to be able to deal with incomplete array types.
7372 Of course an intelligent debugger (GDB?) should be able to
7373 comprehend that a missing upper bound specification in a array
7374 type used for a storage class `auto' local array variable
7375 indicates that the upper bound is both unknown (at compile- time)
7376 and unknowable (at run-time) due to optimization.
7378 We assume that a MEM rtx is safe because gcc wouldn't put the
7379 value there unless it was going to be used repeatedly in the
7380 function, i.e. for cleanups. */
7381 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7383 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7384 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7385 register rtx loc = SAVE_EXPR_RTL (bound);
7387 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7388 it references an outer function's frame. */
7390 if (GET_CODE (loc) == MEM)
7392 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7394 if (XEXP (loc, 0) != new_addr)
7395 loc = gen_rtx_MEM (GET_MODE (loc), new_addr);
7398 add_AT_flag (decl_die, DW_AT_artificial, 1);
7399 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7400 add_AT_location_description (decl_die, DW_AT_location, loc);
7401 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7404 /* Else leave out the attribute. */
7410 /* ??? These types of bounds can be created by the Ada front end,
7411 and it isn't clear how to emit debug info for them. */
7419 /* Note that the block of subscript information for an array type also
7420 includes information about the element type of type given array type. */
7423 add_subscript_info (type_die, type)
7424 register dw_die_ref type_die;
7427 #ifndef MIPS_DEBUGGING_INFO
7428 register unsigned dimension_number;
7430 register tree lower, upper;
7431 register dw_die_ref subrange_die;
7433 /* The GNU compilers represent multidimensional array types as sequences of
7434 one dimensional array types whose element types are themselves array
7435 types. Here we squish that down, so that each multidimensional array
7436 type gets only one array_type DIE in the Dwarf debugging info. The draft
7437 Dwarf specification say that we are allowed to do this kind of
7438 compression in C (because there is no difference between an array or
7439 arrays and a multidimensional array in C) but for other source languages
7440 (e.g. Ada) we probably shouldn't do this. */
7442 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7443 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7444 We work around this by disabling this feature. See also
7445 gen_array_type_die. */
7446 #ifndef MIPS_DEBUGGING_INFO
7447 for (dimension_number = 0;
7448 TREE_CODE (type) == ARRAY_TYPE;
7449 type = TREE_TYPE (type), dimension_number++)
7452 register tree domain = TYPE_DOMAIN (type);
7454 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7455 and (in GNU C only) variable bounds. Handle all three forms
7457 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7460 /* We have an array type with specified bounds. */
7461 lower = TYPE_MIN_VALUE (domain);
7462 upper = TYPE_MAX_VALUE (domain);
7464 /* define the index type. */
7465 if (TREE_TYPE (domain))
7467 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7468 TREE_TYPE field. We can't emit debug info for this
7469 because it is an unnamed integral type. */
7470 if (TREE_CODE (domain) == INTEGER_TYPE
7471 && TYPE_NAME (domain) == NULL_TREE
7472 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7473 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7476 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7480 /* ??? If upper is NULL, the array has unspecified length,
7481 but it does have a lower bound. This happens with Fortran
7483 Since the debugger is definitely going to need to know N
7484 to produce useful results, go ahead and output the lower
7485 bound solo, and hope the debugger can cope. */
7487 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7489 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7492 /* We have an array type with an unspecified length. The DWARF-2
7493 spec does not say how to handle this; let's just leave out the
7498 #ifndef MIPS_DEBUGGING_INFO
7504 add_byte_size_attribute (die, tree_node)
7506 register tree tree_node;
7508 register unsigned size;
7510 switch (TREE_CODE (tree_node))
7518 case QUAL_UNION_TYPE:
7519 size = int_size_in_bytes (tree_node);
7522 /* For a data member of a struct or union, the DW_AT_byte_size is
7523 generally given as the number of bytes normally allocated for an
7524 object of the *declared* type of the member itself. This is true
7525 even for bit-fields. */
7526 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7532 /* Note that `size' might be -1 when we get to this point. If it is, that
7533 indicates that the byte size of the entity in question is variable. We
7534 have no good way of expressing this fact in Dwarf at the present time,
7535 so just let the -1 pass on through. */
7537 add_AT_unsigned (die, DW_AT_byte_size, size);
7540 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7541 which specifies the distance in bits from the highest order bit of the
7542 "containing object" for the bit-field to the highest order bit of the
7545 For any given bit-field, the "containing object" is a hypothetical
7546 object (of some integral or enum type) within which the given bit-field
7547 lives. The type of this hypothetical "containing object" is always the
7548 same as the declared type of the individual bit-field itself. The
7549 determination of the exact location of the "containing object" for a
7550 bit-field is rather complicated. It's handled by the
7551 `field_byte_offset' function (above).
7553 Note that it is the size (in bytes) of the hypothetical "containing object"
7554 which will be given in the DW_AT_byte_size attribute for this bit-field.
7555 (See `byte_size_attribute' above). */
7558 add_bit_offset_attribute (die, decl)
7559 register dw_die_ref die;
7562 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7563 register tree type = DECL_BIT_FIELD_TYPE (decl);
7564 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7565 register unsigned bitpos_int;
7566 register unsigned highest_order_object_bit_offset;
7567 register unsigned highest_order_field_bit_offset;
7568 register unsigned bit_offset;
7570 /* Must be a field and a bit field. */
7572 || TREE_CODE (decl) != FIELD_DECL)
7575 /* We can't yet handle bit-fields whose offsets are variable, so if we
7576 encounter such things, just return without generating any attribute
7578 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7581 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7583 /* Note that the bit offset is always the distance (in bits) from the
7584 highest-order bit of the "containing object" to the highest-order bit of
7585 the bit-field itself. Since the "high-order end" of any object or field
7586 is different on big-endian and little-endian machines, the computation
7587 below must take account of these differences. */
7588 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7589 highest_order_field_bit_offset = bitpos_int;
7591 if (! BYTES_BIG_ENDIAN)
7593 highest_order_field_bit_offset
7594 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7596 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7600 = (! BYTES_BIG_ENDIAN
7601 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7602 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7604 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7607 /* For a FIELD_DECL node which represents a bit field, output an attribute
7608 which specifies the length in bits of the given field. */
7611 add_bit_size_attribute (die, decl)
7612 register dw_die_ref die;
7615 /* Must be a field and a bit field. */
7616 if (TREE_CODE (decl) != FIELD_DECL
7617 || ! DECL_BIT_FIELD_TYPE (decl))
7619 add_AT_unsigned (die, DW_AT_bit_size,
7620 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7623 /* If the compiled language is ANSI C, then add a 'prototyped'
7624 attribute, if arg types are given for the parameters of a function. */
7627 add_prototyped_attribute (die, func_type)
7628 register dw_die_ref die;
7629 register tree func_type;
7631 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7632 && TYPE_ARG_TYPES (func_type) != NULL)
7633 add_AT_flag (die, DW_AT_prototyped, 1);
7637 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7638 by looking in either the type declaration or object declaration
7642 add_abstract_origin_attribute (die, origin)
7643 register dw_die_ref die;
7644 register tree origin;
7646 dw_die_ref origin_die = NULL;
7648 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7649 origin_die = lookup_decl_die (origin);
7650 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7651 origin_die = lookup_type_die (origin);
7653 if (origin_die == NULL)
7656 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7659 /* We do not currently support the pure_virtual attribute. */
7662 add_pure_or_virtual_attribute (die, func_decl)
7663 register dw_die_ref die;
7664 register tree func_decl;
7666 if (DECL_VINDEX (func_decl))
7668 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7669 add_AT_loc (die, DW_AT_vtable_elem_location,
7670 new_loc_descr (DW_OP_constu,
7671 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7674 /* GNU extension: Record what type this method came from originally. */
7675 if (debug_info_level > DINFO_LEVEL_TERSE)
7676 add_AT_die_ref (die, DW_AT_containing_type,
7677 lookup_type_die (DECL_CONTEXT (func_decl)));
7681 /* Add source coordinate attributes for the given decl. */
7684 add_src_coords_attributes (die, decl)
7685 register dw_die_ref die;
7688 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7690 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7691 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7694 /* Add an DW_AT_name attribute and source coordinate attribute for the
7695 given decl, but only if it actually has a name. */
7698 add_name_and_src_coords_attributes (die, decl)
7699 register dw_die_ref die;
7702 register tree decl_name;
7704 decl_name = DECL_NAME (decl);
7705 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7707 add_name_attribute (die, dwarf2_name (decl, 0));
7708 add_src_coords_attributes (die, decl);
7710 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7711 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7712 add_AT_string (die, DW_AT_MIPS_linkage_name,
7713 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7717 /* Push a new declaration scope. */
7720 push_decl_scope (scope)
7723 tree containing_scope;
7726 /* Make room in the decl_scope_table, if necessary. */
7727 if (decl_scope_table_allocated == decl_scope_depth)
7729 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7731 = (decl_scope_node *) xrealloc (decl_scope_table,
7732 (decl_scope_table_allocated
7733 * sizeof (decl_scope_node)));
7736 decl_scope_table[decl_scope_depth].scope = scope;
7738 /* Sometimes, while recursively emitting subtypes within a class type,
7739 we end up recuring on a subtype at a higher level then the current
7740 subtype. In such a case, we need to search the decl_scope_table to
7741 find the parent of this subtype. */
7743 if (AGGREGATE_TYPE_P (scope))
7744 containing_scope = TYPE_CONTEXT (scope);
7746 containing_scope = NULL_TREE;
7748 /* The normal case. */
7749 if (decl_scope_depth == 0
7750 || containing_scope == NULL_TREE
7751 /* Ignore namespaces for the moment. */
7752 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7753 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7754 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7757 /* We need to search for the containing_scope. */
7758 for (i = 0; i < decl_scope_depth; i++)
7759 if (decl_scope_table[i].scope == containing_scope)
7762 if (i == decl_scope_depth)
7765 decl_scope_table[decl_scope_depth].previous = i;
7771 /* Return the DIE for the scope that immediately contains this declaration. */
7774 scope_die_for (t, context_die)
7776 register dw_die_ref context_die;
7778 register dw_die_ref scope_die = NULL;
7779 register tree containing_scope;
7782 /* Walk back up the declaration tree looking for a place to define
7784 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7785 containing_scope = TYPE_CONTEXT (t);
7786 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7787 containing_scope = decl_class_context (t);
7789 containing_scope = DECL_CONTEXT (t);
7791 /* Ignore namespaces for the moment. */
7792 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7793 containing_scope = NULL_TREE;
7795 /* Ignore function type "scopes" from the C frontend. They mean that
7796 a tagged type is local to a parmlist of a function declarator, but
7797 that isn't useful to DWARF. */
7798 if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE)
7799 containing_scope = NULL_TREE;
7801 /* Function-local tags and functions get stuck in limbo until they are
7802 fixed up by decls_for_scope. */
7803 if (context_die == NULL && containing_scope != NULL_TREE
7804 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7807 if (containing_scope == NULL_TREE)
7808 scope_die = comp_unit_die;
7811 for (i = decl_scope_depth - 1, scope_die = context_die;
7812 i >= 0 && decl_scope_table[i].scope != containing_scope;
7813 (scope_die = scope_die->die_parent,
7814 i = decl_scope_table[i].previous))
7817 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7818 does it try to handle types defined by TYPE_DECLs. Such types
7819 thus have an incorrect TYPE_CONTEXT, which points to the block
7820 they were originally defined in, instead of the current block
7821 created by function inlining. We try to detect that here and
7824 if (i < 0 && scope_die == comp_unit_die
7825 && TREE_CODE (containing_scope) == BLOCK
7826 && is_tagged_type (t)
7827 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7828 == containing_scope))
7830 scope_die = context_die;
7831 /* Since the checks below are no longer applicable. */
7837 if (TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7839 if (debug_info_level > DINFO_LEVEL_TERSE
7840 && !TREE_ASM_WRITTEN (containing_scope))
7843 /* If none of the current dies are suitable, we get file scope. */
7844 scope_die = comp_unit_die;
7851 /* Pop a declaration scope. */
7855 if (decl_scope_depth <= 0)
7860 /* Many forms of DIEs require a "type description" attribute. This
7861 routine locates the proper "type descriptor" die for the type given
7862 by 'type', and adds an DW_AT_type attribute below the given die. */
7865 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7866 register dw_die_ref object_die;
7868 register int decl_const;
7869 register int decl_volatile;
7870 register dw_die_ref context_die;
7872 register enum tree_code code = TREE_CODE (type);
7873 register dw_die_ref type_die = NULL;
7875 /* ??? If this type is an unnamed subrange type of an integral or
7876 floating-point type, use the inner type. This is because we have no
7877 support for unnamed types in base_type_die. This can happen if this is
7878 an Ada subrange type. Correct solution is emit a subrange type die. */
7879 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7880 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7881 type = TREE_TYPE (type), code = TREE_CODE (type);
7883 if (code == ERROR_MARK)
7886 /* Handle a special case. For functions whose return type is void, we
7887 generate *no* type attribute. (Note that no object may have type
7888 `void', so this only applies to function return types). */
7889 if (code == VOID_TYPE)
7892 type_die = modified_type_die (type,
7893 decl_const || TYPE_READONLY (type),
7894 decl_volatile || TYPE_VOLATILE (type),
7896 if (type_die != NULL)
7897 add_AT_die_ref (object_die, DW_AT_type, type_die);
7900 /* Given a tree pointer to a struct, class, union, or enum type node, return
7901 a pointer to the (string) tag name for the given type, or zero if the type
7902 was declared without a tag. */
7908 register char *name = 0;
7910 if (TYPE_NAME (type) != 0)
7912 register tree t = 0;
7914 /* Find the IDENTIFIER_NODE for the type name. */
7915 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7916 t = TYPE_NAME (type);
7918 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7919 a TYPE_DECL node, regardless of whether or not a `typedef' was
7921 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7922 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7923 t = DECL_NAME (TYPE_NAME (type));
7925 /* Now get the name as a string, or invent one. */
7927 name = IDENTIFIER_POINTER (t);
7930 return (name == 0 || *name == '\0') ? 0 : name;
7933 /* Return the type associated with a data member, make a special check
7934 for bit field types. */
7937 member_declared_type (member)
7938 register tree member;
7940 return (DECL_BIT_FIELD_TYPE (member)
7941 ? DECL_BIT_FIELD_TYPE (member)
7942 : TREE_TYPE (member));
7945 /* Get the decl's label, as described by its RTL. This may be different
7946 from the DECL_NAME name used in the source file. */
7950 decl_start_label (decl)
7955 x = DECL_RTL (decl);
7956 if (GET_CODE (x) != MEM)
7960 if (GET_CODE (x) != SYMBOL_REF)
7963 fnname = XSTR (x, 0);
7968 /* These routines generate the internal representation of the DIE's for
7969 the compilation unit. Debugging information is collected by walking
7970 the declaration trees passed in from dwarf2out_decl(). */
7973 gen_array_type_die (type, context_die)
7975 register dw_die_ref context_die;
7977 register dw_die_ref scope_die = scope_die_for (type, context_die);
7978 register dw_die_ref array_die;
7979 register tree element_type;
7981 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7982 the inner array type comes before the outer array type. Thus we must
7983 call gen_type_die before we call new_die. See below also. */
7984 #ifdef MIPS_DEBUGGING_INFO
7985 gen_type_die (TREE_TYPE (type), context_die);
7988 array_die = new_die (DW_TAG_array_type, scope_die);
7991 /* We default the array ordering. SDB will probably do
7992 the right things even if DW_AT_ordering is not present. It's not even
7993 an issue until we start to get into multidimensional arrays anyway. If
7994 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7995 then we'll have to put the DW_AT_ordering attribute back in. (But if
7996 and when we find out that we need to put these in, we will only do so
7997 for multidimensional arrays. */
7998 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
8001 #ifdef MIPS_DEBUGGING_INFO
8002 /* The SGI compilers handle arrays of unknown bound by setting
8003 AT_declaration and not emitting any subrange DIEs. */
8004 if (! TYPE_DOMAIN (type))
8005 add_AT_unsigned (array_die, DW_AT_declaration, 1);
8008 add_subscript_info (array_die, type);
8010 equate_type_number_to_die (type, array_die);
8012 /* Add representation of the type of the elements of this array type. */
8013 element_type = TREE_TYPE (type);
8015 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
8016 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
8017 We work around this by disabling this feature. See also
8018 add_subscript_info. */
8019 #ifndef MIPS_DEBUGGING_INFO
8020 while (TREE_CODE (element_type) == ARRAY_TYPE)
8021 element_type = TREE_TYPE (element_type);
8023 gen_type_die (element_type, context_die);
8026 add_type_attribute (array_die, element_type, 0, 0, context_die);
8030 gen_set_type_die (type, context_die)
8032 register dw_die_ref context_die;
8034 register dw_die_ref type_die
8035 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
8037 equate_type_number_to_die (type, type_die);
8038 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
8043 gen_entry_point_die (decl, context_die)
8045 register dw_die_ref context_die;
8047 register tree origin = decl_ultimate_origin (decl);
8048 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
8050 add_abstract_origin_attribute (decl_die, origin);
8053 add_name_and_src_coords_attributes (decl_die, decl);
8054 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
8058 if (DECL_ABSTRACT (decl))
8059 equate_decl_number_to_die (decl, decl_die);
8061 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
8065 /* Remember a type in the pending_types_list. */
8071 if (pending_types == pending_types_allocated)
8073 pending_types_allocated += PENDING_TYPES_INCREMENT;
8075 = (tree *) xrealloc (pending_types_list,
8076 sizeof (tree) * pending_types_allocated);
8079 pending_types_list[pending_types++] = type;
8082 /* Output any pending types (from the pending_types list) which we can output
8083 now (taking into account the scope that we are working on now).
8085 For each type output, remove the given type from the pending_types_list
8086 *before* we try to output it. */
8089 output_pending_types_for_scope (context_die)
8090 register dw_die_ref context_die;
8094 while (pending_types)
8097 type = pending_types_list[pending_types];
8098 gen_type_die (type, context_die);
8099 if (!TREE_ASM_WRITTEN (type))
8104 /* Remember a type in the incomplete_types_list. */
8107 add_incomplete_type (type)
8110 if (incomplete_types == incomplete_types_allocated)
8112 incomplete_types_allocated += INCOMPLETE_TYPES_INCREMENT;
8113 incomplete_types_list
8114 = (tree *) xrealloc (incomplete_types_list,
8115 sizeof (tree) * incomplete_types_allocated);
8118 incomplete_types_list[incomplete_types++] = type;
8121 /* Walk through the list of incomplete types again, trying once more to
8122 emit full debugging info for them. */
8125 retry_incomplete_types ()
8129 while (incomplete_types)
8132 type = incomplete_types_list[incomplete_types];
8133 gen_type_die (type, comp_unit_die);
8137 /* Generate a DIE to represent an inlined instance of an enumeration type. */
8140 gen_inlined_enumeration_type_die (type, context_die)
8142 register dw_die_ref context_die;
8144 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
8145 scope_die_for (type, context_die));
8146 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8147 be incomplete and such types are not marked. */
8148 add_abstract_origin_attribute (type_die, type);
8151 /* Generate a DIE to represent an inlined instance of a structure type. */
8154 gen_inlined_structure_type_die (type, context_die)
8156 register dw_die_ref context_die;
8158 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
8159 scope_die_for (type, context_die));
8160 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8161 be incomplete and such types are not marked. */
8162 add_abstract_origin_attribute (type_die, type);
8165 /* Generate a DIE to represent an inlined instance of a union type. */
8168 gen_inlined_union_type_die (type, context_die)
8170 register dw_die_ref context_die;
8172 register dw_die_ref type_die = new_die (DW_TAG_union_type,
8173 scope_die_for (type, context_die));
8174 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8175 be incomplete and such types are not marked. */
8176 add_abstract_origin_attribute (type_die, type);
8179 /* Generate a DIE to represent an enumeration type. Note that these DIEs
8180 include all of the information about the enumeration values also. Each
8181 enumerated type name/value is listed as a child of the enumerated type
8185 gen_enumeration_type_die (type, context_die)
8187 register dw_die_ref context_die;
8189 register dw_die_ref type_die = lookup_type_die (type);
8191 if (type_die == NULL)
8193 type_die = new_die (DW_TAG_enumeration_type,
8194 scope_die_for (type, context_die));
8195 equate_type_number_to_die (type, type_die);
8196 add_name_attribute (type_die, type_tag (type));
8198 else if (! TYPE_SIZE (type))
8201 remove_AT (type_die, DW_AT_declaration);
8203 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
8204 given enum type is incomplete, do not generate the DW_AT_byte_size
8205 attribute or the DW_AT_element_list attribute. */
8206 if (TYPE_SIZE (type))
8210 TREE_ASM_WRITTEN (type) = 1;
8211 add_byte_size_attribute (type_die, type);
8212 if (TYPE_STUB_DECL (type) != NULL_TREE)
8213 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8215 /* If the first reference to this type was as the return type of an
8216 inline function, then it may not have a parent. Fix this now. */
8217 if (type_die->die_parent == NULL)
8218 add_child_die (scope_die_for (type, context_die), type_die);
8220 for (link = TYPE_FIELDS (type);
8221 link != NULL; link = TREE_CHAIN (link))
8223 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
8225 add_name_attribute (enum_die,
8226 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
8227 add_AT_unsigned (enum_die, DW_AT_const_value,
8228 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
8232 add_AT_flag (type_die, DW_AT_declaration, 1);
8236 /* Generate a DIE to represent either a real live formal parameter decl or to
8237 represent just the type of some formal parameter position in some function
8240 Note that this routine is a bit unusual because its argument may be a
8241 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8242 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8243 node. If it's the former then this function is being called to output a
8244 DIE to represent a formal parameter object (or some inlining thereof). If
8245 it's the latter, then this function is only being called to output a
8246 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8247 argument type of some subprogram type. */
8250 gen_formal_parameter_die (node, context_die)
8252 register dw_die_ref context_die;
8254 register dw_die_ref parm_die
8255 = new_die (DW_TAG_formal_parameter, context_die);
8256 register tree origin;
8258 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8261 origin = decl_ultimate_origin (node);
8263 add_abstract_origin_attribute (parm_die, origin);
8266 add_name_and_src_coords_attributes (parm_die, node);
8267 add_type_attribute (parm_die, TREE_TYPE (node),
8268 TREE_READONLY (node),
8269 TREE_THIS_VOLATILE (node),
8271 if (DECL_ARTIFICIAL (node))
8272 add_AT_flag (parm_die, DW_AT_artificial, 1);
8275 equate_decl_number_to_die (node, parm_die);
8276 if (! DECL_ABSTRACT (node))
8277 add_location_or_const_value_attribute (parm_die, node);
8282 /* We were called with some kind of a ..._TYPE node. */
8283 add_type_attribute (parm_die, node, 0, 0, context_die);
8293 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8294 at the end of an (ANSI prototyped) formal parameters list. */
8297 gen_unspecified_parameters_die (decl_or_type, context_die)
8298 register tree decl_or_type ATTRIBUTE_UNUSED;
8299 register dw_die_ref context_die;
8301 new_die (DW_TAG_unspecified_parameters, context_die);
8304 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8305 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8306 parameters as specified in some function type specification (except for
8307 those which appear as part of a function *definition*).
8309 Note we must be careful here to output all of the parameter DIEs before*
8310 we output any DIEs needed to represent the types of the formal parameters.
8311 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8312 non-parameter DIE it sees ends the formal parameter list. */
8315 gen_formal_types_die (function_or_method_type, context_die)
8316 register tree function_or_method_type;
8317 register dw_die_ref context_die;
8320 register tree formal_type = NULL;
8321 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8324 /* In the case where we are generating a formal types list for a C++
8325 non-static member function type, skip over the first thing on the
8326 TYPE_ARG_TYPES list because it only represents the type of the hidden
8327 `this pointer'. The debugger should be able to figure out (without
8328 being explicitly told) that this non-static member function type takes a
8329 `this pointer' and should be able to figure what the type of that hidden
8330 parameter is from the DW_AT_member attribute of the parent
8331 DW_TAG_subroutine_type DIE. */
8332 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8333 first_parm_type = TREE_CHAIN (first_parm_type);
8336 /* Make our first pass over the list of formal parameter types and output a
8337 DW_TAG_formal_parameter DIE for each one. */
8338 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8340 register dw_die_ref parm_die;
8342 formal_type = TREE_VALUE (link);
8343 if (formal_type == void_type_node)
8346 /* Output a (nameless) DIE to represent the formal parameter itself. */
8347 parm_die = gen_formal_parameter_die (formal_type, context_die);
8348 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8349 && link == first_parm_type)
8350 add_AT_flag (parm_die, DW_AT_artificial, 1);
8353 /* If this function type has an ellipsis, add a
8354 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8355 if (formal_type != void_type_node)
8356 gen_unspecified_parameters_die (function_or_method_type, context_die);
8358 /* Make our second (and final) pass over the list of formal parameter types
8359 and output DIEs to represent those types (as necessary). */
8360 for (link = TYPE_ARG_TYPES (function_or_method_type);
8362 link = TREE_CHAIN (link))
8364 formal_type = TREE_VALUE (link);
8365 if (formal_type == void_type_node)
8368 gen_type_die (formal_type, context_die);
8372 /* Generate a DIE to represent a declared function (either file-scope or
8376 gen_subprogram_die (decl, context_die)
8378 register dw_die_ref context_die;
8380 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8381 register tree origin = decl_ultimate_origin (decl);
8382 register dw_die_ref subr_die;
8383 register rtx fp_reg;
8384 register tree fn_arg_types;
8385 register tree outer_scope;
8386 register dw_die_ref old_die = lookup_decl_die (decl);
8387 register int declaration
8388 = (current_function_decl != decl
8390 && (context_die->die_tag == DW_TAG_structure_type
8391 || context_die->die_tag == DW_TAG_union_type)));
8395 subr_die = new_die (DW_TAG_subprogram, context_die);
8396 add_abstract_origin_attribute (subr_die, origin);
8398 else if (old_die && DECL_ABSTRACT (decl)
8399 && get_AT_unsigned (old_die, DW_AT_inline))
8401 /* This must be a redefinition of an extern inline function.
8402 We can just reuse the old die here. */
8405 /* Clear out the inlined attribute and parm types. */
8406 remove_AT (subr_die, DW_AT_inline);
8407 remove_children (subr_die);
8411 register unsigned file_index
8412 = lookup_filename (DECL_SOURCE_FILE (decl));
8414 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8416 /* ??? This can happen if there is a bug in the program, for
8417 instance, if it has duplicate function definitions. Ideally,
8418 we should detect this case and ignore it. For now, if we have
8419 already reported an error, any error at all, then assume that
8420 we got here because of a input error, not a dwarf2 bug. */
8426 /* If the definition comes from the same place as the declaration,
8427 maybe use the old DIE. We always want the DIE for this function
8428 that has the *_pc attributes to be under comp_unit_die so the
8429 debugger can find it. For inlines, that is the concrete instance,
8430 so we can use the old DIE here. For non-inline methods, we want a
8431 specification DIE at toplevel, so we need a new DIE. For local
8432 class methods, this does not apply. */
8433 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8434 || context_die == NULL)
8435 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8436 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8437 == (unsigned)DECL_SOURCE_LINE (decl)))
8441 /* Clear out the declaration attribute and the parm types. */
8442 remove_AT (subr_die, DW_AT_declaration);
8443 remove_children (subr_die);
8447 subr_die = new_die (DW_TAG_subprogram, context_die);
8448 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8449 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8450 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8451 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8452 != (unsigned)DECL_SOURCE_LINE (decl))
8454 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8459 register dw_die_ref scope_die;
8461 if (DECL_CONTEXT (decl))
8462 scope_die = scope_die_for (decl, context_die);
8464 /* Don't put block extern declarations under comp_unit_die. */
8465 scope_die = context_die;
8467 subr_die = new_die (DW_TAG_subprogram, scope_die);
8469 if (TREE_PUBLIC (decl))
8470 add_AT_flag (subr_die, DW_AT_external, 1);
8472 add_name_and_src_coords_attributes (subr_die, decl);
8473 if (debug_info_level > DINFO_LEVEL_TERSE)
8475 register tree type = TREE_TYPE (decl);
8477 add_prototyped_attribute (subr_die, type);
8478 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8481 add_pure_or_virtual_attribute (subr_die, decl);
8482 if (DECL_ARTIFICIAL (decl))
8483 add_AT_flag (subr_die, DW_AT_artificial, 1);
8484 if (TREE_PROTECTED (decl))
8485 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8486 else if (TREE_PRIVATE (decl))
8487 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8492 add_AT_flag (subr_die, DW_AT_declaration, 1);
8494 /* The first time we see a member function, it is in the context of
8495 the class to which it belongs. We make sure of this by emitting
8496 the class first. The next time is the definition, which is
8497 handled above. The two may come from the same source text. */
8498 if (DECL_CONTEXT (decl))
8499 equate_decl_number_to_die (decl, subr_die);
8501 else if (DECL_ABSTRACT (decl))
8503 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8504 but not for extern inline functions. We can't get this completely
8505 correct because information about whether the function was declared
8506 inline is not saved anywhere. */
8507 if (DECL_DEFER_OUTPUT (decl))
8509 if (DECL_INLINE (decl))
8510 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8512 add_AT_unsigned (subr_die, DW_AT_inline,
8513 DW_INL_declared_not_inlined);
8515 else if (DECL_INLINE (decl))
8516 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8520 equate_decl_number_to_die (decl, subr_die);
8522 else if (!DECL_EXTERNAL (decl))
8524 if (origin == NULL_TREE)
8525 equate_decl_number_to_die (decl, subr_die);
8527 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8528 current_funcdef_number);
8529 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8530 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8531 current_funcdef_number);
8532 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8534 add_pubname (decl, subr_die);
8535 add_arange (decl, subr_die);
8537 #ifdef MIPS_DEBUGGING_INFO
8538 /* Add a reference to the FDE for this routine. */
8539 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8542 /* Define the "frame base" location for this routine. We use the
8543 frame pointer or stack pointer registers, since the RTL for local
8544 variables is relative to one of them. */
8546 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8547 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8550 /* ??? This fails for nested inline functions, because context_display
8551 is not part of the state saved/restored for inline functions. */
8552 if (current_function_needs_context)
8553 add_AT_location_description (subr_die, DW_AT_static_link,
8554 lookup_static_chain (decl));
8558 /* Now output descriptions of the arguments for this function. This gets
8559 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8560 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8561 `...' at the end of the formal parameter list. In order to find out if
8562 there was a trailing ellipsis or not, we must instead look at the type
8563 associated with the FUNCTION_DECL. This will be a node of type
8564 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8565 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8566 an ellipsis at the end. */
8567 push_decl_scope (decl);
8569 /* In the case where we are describing a mere function declaration, all we
8570 need to do here (and all we *can* do here) is to describe the *types* of
8571 its formal parameters. */
8572 if (debug_info_level <= DINFO_LEVEL_TERSE)
8574 else if (declaration)
8575 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8578 /* Generate DIEs to represent all known formal parameters */
8579 register tree arg_decls = DECL_ARGUMENTS (decl);
8582 /* When generating DIEs, generate the unspecified_parameters DIE
8583 instead if we come across the arg "__builtin_va_alist" */
8584 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8585 if (TREE_CODE (parm) == PARM_DECL)
8587 if (DECL_NAME (parm)
8588 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8589 "__builtin_va_alist"))
8590 gen_unspecified_parameters_die (parm, subr_die);
8592 gen_decl_die (parm, subr_die);
8595 /* Decide whether we need a unspecified_parameters DIE at the end.
8596 There are 2 more cases to do this for: 1) the ansi ... declaration -
8597 this is detectable when the end of the arg list is not a
8598 void_type_node 2) an unprototyped function declaration (not a
8599 definition). This just means that we have no info about the
8600 parameters at all. */
8601 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8602 if (fn_arg_types != NULL)
8604 /* this is the prototyped case, check for ... */
8605 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8606 gen_unspecified_parameters_die (decl, subr_die);
8608 else if (DECL_INITIAL (decl) == NULL_TREE)
8609 gen_unspecified_parameters_die (decl, subr_die);
8612 /* Output Dwarf info for all of the stuff within the body of the function
8613 (if it has one - it may be just a declaration). */
8614 outer_scope = DECL_INITIAL (decl);
8616 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8617 node created to represent a function. This outermost BLOCK actually
8618 represents the outermost binding contour for the function, i.e. the
8619 contour in which the function's formal parameters and labels get
8620 declared. Curiously, it appears that the front end doesn't actually
8621 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8622 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8623 list for the function instead.) The BLOCK_VARS list for the
8624 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8625 the function however, and we output DWARF info for those in
8626 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8627 node representing the function's outermost pair of curly braces, and
8628 any blocks used for the base and member initializers of a C++
8629 constructor function. */
8630 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8632 current_function_has_inlines = 0;
8633 decls_for_scope (outer_scope, subr_die, 0);
8635 #if 0 && defined (MIPS_DEBUGGING_INFO)
8636 if (current_function_has_inlines)
8638 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8639 if (! comp_unit_has_inlines)
8641 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8642 comp_unit_has_inlines = 1;
8651 /* Generate a DIE to represent a declared data object. */
8654 gen_variable_die (decl, context_die)
8656 register dw_die_ref context_die;
8658 register tree origin = decl_ultimate_origin (decl);
8659 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8661 dw_die_ref old_die = lookup_decl_die (decl);
8663 = (DECL_EXTERNAL (decl)
8664 || current_function_decl != decl_function_context (decl)
8665 || context_die->die_tag == DW_TAG_structure_type
8666 || context_die->die_tag == DW_TAG_union_type);
8669 add_abstract_origin_attribute (var_die, origin);
8670 /* Loop unrolling can create multiple blocks that refer to the same
8671 static variable, so we must test for the DW_AT_declaration flag. */
8672 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8673 copy decls and set the DECL_ABSTRACT flag on them instead of
8675 else if (old_die && TREE_STATIC (decl)
8676 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8678 /* This is a definition of a C++ class level static. */
8679 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8680 if (DECL_NAME (decl))
8682 register unsigned file_index
8683 = lookup_filename (DECL_SOURCE_FILE (decl));
8685 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8686 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8688 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8689 != (unsigned)DECL_SOURCE_LINE (decl))
8691 add_AT_unsigned (var_die, DW_AT_decl_line,
8692 DECL_SOURCE_LINE (decl));
8697 add_name_and_src_coords_attributes (var_die, decl);
8698 add_type_attribute (var_die, TREE_TYPE (decl),
8699 TREE_READONLY (decl),
8700 TREE_THIS_VOLATILE (decl), context_die);
8702 if (TREE_PUBLIC (decl))
8703 add_AT_flag (var_die, DW_AT_external, 1);
8705 if (DECL_ARTIFICIAL (decl))
8706 add_AT_flag (var_die, DW_AT_artificial, 1);
8708 if (TREE_PROTECTED (decl))
8709 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8711 else if (TREE_PRIVATE (decl))
8712 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8716 add_AT_flag (var_die, DW_AT_declaration, 1);
8718 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8719 equate_decl_number_to_die (decl, var_die);
8721 if (! declaration && ! DECL_ABSTRACT (decl))
8723 equate_decl_number_to_die (decl, var_die);
8724 add_location_or_const_value_attribute (var_die, decl);
8725 add_pubname (decl, var_die);
8729 /* Generate a DIE to represent a label identifier. */
8732 gen_label_die (decl, context_die)
8734 register dw_die_ref context_die;
8736 register tree origin = decl_ultimate_origin (decl);
8737 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8739 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8740 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8743 add_abstract_origin_attribute (lbl_die, origin);
8745 add_name_and_src_coords_attributes (lbl_die, decl);
8747 if (DECL_ABSTRACT (decl))
8748 equate_decl_number_to_die (decl, lbl_die);
8751 insn = DECL_RTL (decl);
8753 /* Deleted labels are programmer specified labels which have been
8754 eliminated because of various optimisations. We still emit them
8755 here so that it is possible to put breakpoints on them. */
8756 if (GET_CODE (insn) == CODE_LABEL
8757 || ((GET_CODE (insn) == NOTE
8758 && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)))
8760 /* When optimization is enabled (via -O) some parts of the compiler
8761 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8762 represent source-level labels which were explicitly declared by
8763 the user. This really shouldn't be happening though, so catch
8764 it if it ever does happen. */
8765 if (INSN_DELETED_P (insn))
8768 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8769 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8770 (unsigned) INSN_UID (insn));
8771 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8776 /* Generate a DIE for a lexical block. */
8779 gen_lexical_block_die (stmt, context_die, depth)
8781 register dw_die_ref context_die;
8784 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8785 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8787 if (! BLOCK_ABSTRACT (stmt))
8789 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8791 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8792 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8793 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8796 push_decl_scope (stmt);
8797 decls_for_scope (stmt, stmt_die, depth);
8801 /* Generate a DIE for an inlined subprogram. */
8804 gen_inlined_subroutine_die (stmt, context_die, depth)
8806 register dw_die_ref context_die;
8809 if (! BLOCK_ABSTRACT (stmt))
8811 register dw_die_ref subr_die
8812 = new_die (DW_TAG_inlined_subroutine, context_die);
8813 register tree decl = block_ultimate_origin (stmt);
8814 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8816 add_abstract_origin_attribute (subr_die, decl);
8817 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8819 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8820 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8821 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8822 push_decl_scope (decl);
8823 decls_for_scope (stmt, subr_die, depth);
8825 current_function_has_inlines = 1;
8829 /* Generate a DIE for a field in a record, or structure. */
8832 gen_field_die (decl, context_die)
8834 register dw_die_ref context_die;
8836 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8838 add_name_and_src_coords_attributes (decl_die, decl);
8839 add_type_attribute (decl_die, member_declared_type (decl),
8840 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8843 /* If this is a bit field... */
8844 if (DECL_BIT_FIELD_TYPE (decl))
8846 add_byte_size_attribute (decl_die, decl);
8847 add_bit_size_attribute (decl_die, decl);
8848 add_bit_offset_attribute (decl_die, decl);
8851 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8852 add_data_member_location_attribute (decl_die, decl);
8854 if (DECL_ARTIFICIAL (decl))
8855 add_AT_flag (decl_die, DW_AT_artificial, 1);
8857 if (TREE_PROTECTED (decl))
8858 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8860 else if (TREE_PRIVATE (decl))
8861 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8865 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8866 Use modified_type_die instead.
8867 We keep this code here just in case these types of DIEs may be needed to
8868 represent certain things in other languages (e.g. Pascal) someday. */
8870 gen_pointer_type_die (type, context_die)
8872 register dw_die_ref context_die;
8874 register dw_die_ref ptr_die
8875 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8877 equate_type_number_to_die (type, ptr_die);
8878 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8879 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8882 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8883 Use modified_type_die instead.
8884 We keep this code here just in case these types of DIEs may be needed to
8885 represent certain things in other languages (e.g. Pascal) someday. */
8887 gen_reference_type_die (type, context_die)
8889 register dw_die_ref context_die;
8891 register dw_die_ref ref_die
8892 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8894 equate_type_number_to_die (type, ref_die);
8895 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8896 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8900 /* Generate a DIE for a pointer to a member type. */
8902 gen_ptr_to_mbr_type_die (type, context_die)
8904 register dw_die_ref context_die;
8906 register dw_die_ref ptr_die
8907 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8909 equate_type_number_to_die (type, ptr_die);
8910 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8911 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8912 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8915 /* Generate the DIE for the compilation unit. */
8918 gen_compile_unit_die (main_input_filename)
8919 register char *main_input_filename;
8922 char *wd = getpwd ();
8924 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8925 add_name_attribute (comp_unit_die, main_input_filename);
8928 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8930 sprintf (producer, "%s %s", language_string, version_string);
8932 #ifdef MIPS_DEBUGGING_INFO
8933 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8934 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8935 not appear in the producer string, the debugger reaches the conclusion
8936 that the object file is stripped and has no debugging information.
8937 To get the MIPS/SGI debugger to believe that there is debugging
8938 information in the object file, we add a -g to the producer string. */
8939 if (debug_info_level > DINFO_LEVEL_TERSE)
8940 strcat (producer, " -g");
8943 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8945 if (strcmp (language_string, "GNU C++") == 0)
8946 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8948 else if (strcmp (language_string, "GNU Ada") == 0)
8949 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8951 else if (strcmp (language_string, "GNU F77") == 0)
8952 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8954 else if (strcmp (language_string, "GNU Pascal") == 0)
8955 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8957 else if (flag_traditional)
8958 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8961 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8963 #if 0 /* unimplemented */
8964 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8965 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8969 /* Generate a DIE for a string type. */
8972 gen_string_type_die (type, context_die)
8974 register dw_die_ref context_die;
8976 register dw_die_ref type_die
8977 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8979 equate_type_number_to_die (type, type_die);
8981 /* Fudge the string length attribute for now. */
8983 /* TODO: add string length info.
8984 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8985 bound_representation (upper_bound, 0, 'u'); */
8988 /* Generate the DIE for a base class. */
8991 gen_inheritance_die (binfo, context_die)
8992 register tree binfo;
8993 register dw_die_ref context_die;
8995 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8997 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8998 add_data_member_location_attribute (die, binfo);
9000 if (TREE_VIA_VIRTUAL (binfo))
9001 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
9002 if (TREE_VIA_PUBLIC (binfo))
9003 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
9004 else if (TREE_VIA_PROTECTED (binfo))
9005 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
9008 /* Generate a DIE for a class member. */
9011 gen_member_die (type, context_die)
9013 register dw_die_ref context_die;
9015 register tree member;
9017 /* If this is not an incomplete type, output descriptions of each of its
9018 members. Note that as we output the DIEs necessary to represent the
9019 members of this record or union type, we will also be trying to output
9020 DIEs to represent the *types* of those members. However the `type'
9021 function (above) will specifically avoid generating type DIEs for member
9022 types *within* the list of member DIEs for this (containing) type execpt
9023 for those types (of members) which are explicitly marked as also being
9024 members of this (containing) type themselves. The g++ front- end can
9025 force any given type to be treated as a member of some other
9026 (containing) type by setting the TYPE_CONTEXT of the given (member) type
9027 to point to the TREE node representing the appropriate (containing)
9030 /* First output info about the base classes. */
9031 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
9033 register tree bases = TYPE_BINFO_BASETYPES (type);
9034 register int n_bases = TREE_VEC_LENGTH (bases);
9037 for (i = 0; i < n_bases; i++)
9038 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
9041 /* Now output info about the data members and type members. */
9042 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
9043 gen_decl_die (member, context_die);
9045 /* Now output info about the function members (if any). */
9046 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
9047 gen_decl_die (member, context_die);
9050 /* Generate a DIE for a structure or union type. */
9053 gen_struct_or_union_type_die (type, context_die)
9055 register dw_die_ref context_die;
9057 register dw_die_ref type_die = lookup_type_die (type);
9058 register dw_die_ref scope_die = 0;
9059 register int nested = 0;
9061 if (type_die && ! TYPE_SIZE (type))
9064 if (TYPE_CONTEXT (type) != NULL_TREE
9065 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)))
9068 scope_die = scope_die_for (type, context_die);
9070 if (! type_die || (nested && scope_die == comp_unit_die))
9071 /* First occurrence of type or toplevel definition of nested class. */
9073 register dw_die_ref old_die = type_die;
9075 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
9076 ? DW_TAG_structure_type : DW_TAG_union_type,
9078 equate_type_number_to_die (type, type_die);
9079 add_name_attribute (type_die, type_tag (type));
9081 add_AT_die_ref (type_die, DW_AT_specification, old_die);
9084 remove_AT (type_die, DW_AT_declaration);
9086 /* If we're not in the right context to be defining this type, defer to
9087 avoid tricky recursion. */
9088 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
9090 add_AT_flag (type_die, DW_AT_declaration, 1);
9093 /* If this type has been completed, then give it a byte_size attribute and
9094 then give a list of members. */
9095 else if (TYPE_SIZE (type))
9097 /* Prevent infinite recursion in cases where the type of some member of
9098 this type is expressed in terms of this type itself. */
9099 TREE_ASM_WRITTEN (type) = 1;
9100 add_byte_size_attribute (type_die, type);
9101 if (TYPE_STUB_DECL (type) != NULL_TREE)
9102 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
9104 /* If the first reference to this type was as the return type of an
9105 inline function, then it may not have a parent. Fix this now. */
9106 if (type_die->die_parent == NULL)
9107 add_child_die (scope_die, type_die);
9109 push_decl_scope (type);
9110 gen_member_die (type, type_die);
9113 /* GNU extension: Record what type our vtable lives in. */
9114 if (TYPE_VFIELD (type))
9116 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
9118 gen_type_die (vtype, context_die);
9119 add_AT_die_ref (type_die, DW_AT_containing_type,
9120 lookup_type_die (vtype));
9125 add_AT_flag (type_die, DW_AT_declaration, 1);
9127 /* We can't do this for function-local types, and we don't need to. */
9128 if (TREE_PERMANENT (type))
9129 add_incomplete_type (type);
9133 /* Generate a DIE for a subroutine _type_. */
9136 gen_subroutine_type_die (type, context_die)
9138 register dw_die_ref context_die;
9140 register tree return_type = TREE_TYPE (type);
9141 register dw_die_ref subr_die
9142 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
9144 equate_type_number_to_die (type, subr_die);
9145 add_prototyped_attribute (subr_die, type);
9146 add_type_attribute (subr_die, return_type, 0, 0, context_die);
9147 gen_formal_types_die (type, subr_die);
9150 /* Generate a DIE for a type definition */
9153 gen_typedef_die (decl, context_die)
9155 register dw_die_ref context_die;
9157 register dw_die_ref type_die;
9158 register tree origin;
9160 if (TREE_ASM_WRITTEN (decl))
9162 TREE_ASM_WRITTEN (decl) = 1;
9164 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
9165 origin = decl_ultimate_origin (decl);
9167 add_abstract_origin_attribute (type_die, origin);
9171 add_name_and_src_coords_attributes (type_die, decl);
9172 if (DECL_ORIGINAL_TYPE (decl))
9174 type = DECL_ORIGINAL_TYPE (decl);
9175 equate_type_number_to_die (TREE_TYPE (decl), type_die);
9178 type = TREE_TYPE (decl);
9179 add_type_attribute (type_die, type, TREE_READONLY (decl),
9180 TREE_THIS_VOLATILE (decl), context_die);
9183 if (DECL_ABSTRACT (decl))
9184 equate_decl_number_to_die (decl, type_die);
9187 /* Generate a type description DIE. */
9190 gen_type_die (type, context_die)
9192 register dw_die_ref context_die;
9194 if (type == NULL_TREE || type == error_mark_node)
9197 /* We are going to output a DIE to represent the unqualified version of
9198 this type (i.e. without any const or volatile qualifiers) so get the
9199 main variant (i.e. the unqualified version) of this type now. */
9200 type = type_main_variant (type);
9202 if (TREE_ASM_WRITTEN (type))
9205 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9206 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
9208 TREE_ASM_WRITTEN (type) = 1;
9209 gen_decl_die (TYPE_NAME (type), context_die);
9213 switch (TREE_CODE (type))
9219 case REFERENCE_TYPE:
9220 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
9221 ensures that the gen_type_die recursion will terminate even if the
9222 type is recursive. Recursive types are possible in Ada. */
9223 /* ??? We could perhaps do this for all types before the switch
9225 TREE_ASM_WRITTEN (type) = 1;
9227 /* For these types, all that is required is that we output a DIE (or a
9228 set of DIEs) to represent the "basis" type. */
9229 gen_type_die (TREE_TYPE (type), context_die);
9233 /* This code is used for C++ pointer-to-data-member types.
9234 Output a description of the relevant class type. */
9235 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
9237 /* Output a description of the type of the object pointed to. */
9238 gen_type_die (TREE_TYPE (type), context_die);
9240 /* Now output a DIE to represent this pointer-to-data-member type
9242 gen_ptr_to_mbr_type_die (type, context_die);
9246 gen_type_die (TYPE_DOMAIN (type), context_die);
9247 gen_set_type_die (type, context_die);
9251 gen_type_die (TREE_TYPE (type), context_die);
9252 abort (); /* No way to represent these in Dwarf yet! */
9256 /* Force out return type (in case it wasn't forced out already). */
9257 gen_type_die (TREE_TYPE (type), context_die);
9258 gen_subroutine_type_die (type, context_die);
9262 /* Force out return type (in case it wasn't forced out already). */
9263 gen_type_die (TREE_TYPE (type), context_die);
9264 gen_subroutine_type_die (type, context_die);
9268 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9270 gen_type_die (TREE_TYPE (type), context_die);
9271 gen_string_type_die (type, context_die);
9274 gen_array_type_die (type, context_die);
9280 case QUAL_UNION_TYPE:
9281 /* If this is a nested type whose containing class hasn't been
9282 written out yet, writing it out will cover this one, too. */
9283 if (TYPE_CONTEXT (type)
9284 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9285 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9287 gen_type_die (TYPE_CONTEXT (type), context_die);
9289 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9292 /* If that failed, attach ourselves to the stub. */
9293 push_decl_scope (TYPE_CONTEXT (type));
9294 context_die = lookup_type_die (TYPE_CONTEXT (type));
9297 if (TREE_CODE (type) == ENUMERAL_TYPE)
9298 gen_enumeration_type_die (type, context_die);
9300 gen_struct_or_union_type_die (type, context_die);
9302 if (TYPE_CONTEXT (type)
9303 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9304 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9307 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9308 it up if it is ever completed. gen_*_type_die will set it for us
9309 when appropriate. */
9318 /* No DIEs needed for fundamental types. */
9322 /* No Dwarf representation currently defined. */
9329 TREE_ASM_WRITTEN (type) = 1;
9332 /* Generate a DIE for a tagged type instantiation. */
9335 gen_tagged_type_instantiation_die (type, context_die)
9337 register dw_die_ref context_die;
9339 if (type == NULL_TREE || type == error_mark_node)
9342 /* We are going to output a DIE to represent the unqualified version of
9343 this type (i.e. without any const or volatile qualifiers) so make sure
9344 that we have the main variant (i.e. the unqualified version) of this
9346 if (type != type_main_variant (type))
9349 /* Do not check TREE_ASM_WRITTEN(type) as it may not be set if this is
9350 an instance of an unresolved type. */
9352 switch (TREE_CODE (type))
9358 gen_inlined_enumeration_type_die (type, context_die);
9362 gen_inlined_structure_type_die (type, context_die);
9366 case QUAL_UNION_TYPE:
9367 gen_inlined_union_type_die (type, context_die);
9375 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9376 things which are local to the given block. */
9379 gen_block_die (stmt, context_die, depth)
9381 register dw_die_ref context_die;
9384 register int must_output_die = 0;
9385 register tree origin;
9387 register enum tree_code origin_code;
9389 /* Ignore blocks never really used to make RTL. */
9391 if (stmt == NULL_TREE || !TREE_USED (stmt))
9394 /* Determine the "ultimate origin" of this block. This block may be an
9395 inlined instance of an inlined instance of inline function, so we have
9396 to trace all of the way back through the origin chain to find out what
9397 sort of node actually served as the original seed for the creation of
9398 the current block. */
9399 origin = block_ultimate_origin (stmt);
9400 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9402 /* Determine if we need to output any Dwarf DIEs at all to represent this
9404 if (origin_code == FUNCTION_DECL)
9405 /* The outer scopes for inlinings *must* always be represented. We
9406 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9407 must_output_die = 1;
9410 /* In the case where the current block represents an inlining of the
9411 "body block" of an inline function, we must *NOT* output any DIE for
9412 this block because we have already output a DIE to represent the
9413 whole inlined function scope and the "body block" of any function
9414 doesn't really represent a different scope according to ANSI C
9415 rules. So we check here to make sure that this block does not
9416 represent a "body block inlining" before trying to set the
9417 `must_output_die' flag. */
9418 if (! is_body_block (origin ? origin : stmt))
9420 /* Determine if this block directly contains any "significant"
9421 local declarations which we will need to output DIEs for. */
9422 if (debug_info_level > DINFO_LEVEL_TERSE)
9423 /* We are not in terse mode so *any* local declaration counts
9424 as being a "significant" one. */
9425 must_output_die = (BLOCK_VARS (stmt) != NULL);
9427 /* We are in terse mode, so only local (nested) function
9428 definitions count as "significant" local declarations. */
9429 for (decl = BLOCK_VARS (stmt);
9430 decl != NULL; decl = TREE_CHAIN (decl))
9431 if (TREE_CODE (decl) == FUNCTION_DECL
9432 && DECL_INITIAL (decl))
9434 must_output_die = 1;
9440 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9441 DIE for any block which contains no significant local declarations at
9442 all. Rather, in such cases we just call `decls_for_scope' so that any
9443 needed Dwarf info for any sub-blocks will get properly generated. Note
9444 that in terse mode, our definition of what constitutes a "significant"
9445 local declaration gets restricted to include only inlined function
9446 instances and local (nested) function definitions. */
9447 if (must_output_die)
9449 if (origin_code == FUNCTION_DECL)
9450 gen_inlined_subroutine_die (stmt, context_die, depth);
9452 gen_lexical_block_die (stmt, context_die, depth);
9455 decls_for_scope (stmt, context_die, depth);
9458 /* Generate all of the decls declared within a given scope and (recursively)
9459 all of its sub-blocks. */
9462 decls_for_scope (stmt, context_die, depth)
9464 register dw_die_ref context_die;
9468 register tree subblocks;
9470 /* Ignore blocks never really used to make RTL. */
9471 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9474 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9475 next_block_number++;
9477 /* Output the DIEs to represent all of the data objects and typedefs
9478 declared directly within this block but not within any nested
9479 sub-blocks. Also, nested function and tag DIEs have been
9480 generated with a parent of NULL; fix that up now. */
9481 for (decl = BLOCK_VARS (stmt);
9482 decl != NULL; decl = TREE_CHAIN (decl))
9484 register dw_die_ref die;
9486 if (TREE_CODE (decl) == FUNCTION_DECL)
9487 die = lookup_decl_die (decl);
9488 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9489 die = lookup_type_die (TREE_TYPE (decl));
9493 if (die != NULL && die->die_parent == NULL)
9494 add_child_die (context_die, die);
9496 gen_decl_die (decl, context_die);
9499 /* Output the DIEs to represent all sub-blocks (and the items declared
9500 therein) of this block. */
9501 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9503 subblocks = BLOCK_CHAIN (subblocks))
9504 gen_block_die (subblocks, context_die, depth + 1);
9507 /* Is this a typedef we can avoid emitting? */
9510 is_redundant_typedef (decl)
9513 if (TYPE_DECL_IS_STUB (decl))
9516 if (DECL_ARTIFICIAL (decl)
9517 && DECL_CONTEXT (decl)
9518 && is_tagged_type (DECL_CONTEXT (decl))
9519 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9520 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9521 /* Also ignore the artificial member typedef for the class name. */
9527 /* Generate Dwarf debug information for a decl described by DECL. */
9530 gen_decl_die (decl, context_die)
9532 register dw_die_ref context_die;
9534 register tree origin;
9536 /* Make a note of the decl node we are going to be working on. We may need
9537 to give the user the source coordinates of where it appeared in case we
9538 notice (later on) that something about it looks screwy. */
9539 dwarf_last_decl = decl;
9541 if (TREE_CODE (decl) == ERROR_MARK)
9544 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9545 ignore a function definition, since that would screw up our count of
9546 blocks, and that in turn will completely screw up the labels we will
9547 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9548 subsequent blocks). */
9549 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9552 switch (TREE_CODE (decl))
9555 /* The individual enumerators of an enum type get output when we output
9556 the Dwarf representation of the relevant enum type itself. */
9560 /* Don't output any DIEs to represent mere function declarations,
9561 unless they are class members or explicit block externs. */
9562 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9563 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9566 if (debug_info_level > DINFO_LEVEL_TERSE)
9568 /* Before we describe the FUNCTION_DECL itself, make sure that we
9569 have described its return type. */
9570 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9572 /* And its containing type. */
9573 origin = decl_class_context (decl);
9574 if (origin != NULL_TREE)
9575 gen_type_die (origin, context_die);
9577 /* And its virtual context. */
9578 if (DECL_VINDEX (decl) != NULL_TREE)
9579 gen_type_die (DECL_CONTEXT (decl), context_die);
9582 /* Now output a DIE to represent the function itself. */
9583 gen_subprogram_die (decl, context_die);
9587 /* If we are in terse mode, don't generate any DIEs to represent any
9589 if (debug_info_level <= DINFO_LEVEL_TERSE)
9592 /* In the special case of a TYPE_DECL node representing the
9593 declaration of some type tag, if the given TYPE_DECL is marked as
9594 having been instantiated from some other (original) TYPE_DECL node
9595 (e.g. one which was generated within the original definition of an
9596 inline function) we have to generate a special (abbreviated)
9597 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9599 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9601 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9605 if (is_redundant_typedef (decl))
9606 gen_type_die (TREE_TYPE (decl), context_die);
9608 /* Output a DIE to represent the typedef itself. */
9609 gen_typedef_die (decl, context_die);
9613 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9614 gen_label_die (decl, context_die);
9618 /* If we are in terse mode, don't generate any DIEs to represent any
9619 variable declarations or definitions. */
9620 if (debug_info_level <= DINFO_LEVEL_TERSE)
9623 /* Output any DIEs that are needed to specify the type of this data
9625 gen_type_die (TREE_TYPE (decl), context_die);
9627 /* And its containing type. */
9628 origin = decl_class_context (decl);
9629 if (origin != NULL_TREE)
9630 gen_type_die (origin, context_die);
9632 /* Now output the DIE to represent the data object itself. This gets
9633 complicated because of the possibility that the VAR_DECL really
9634 represents an inlined instance of a formal parameter for an inline
9636 origin = decl_ultimate_origin (decl);
9637 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9638 gen_formal_parameter_die (decl, context_die);
9640 gen_variable_die (decl, context_die);
9644 /* Ignore the nameless fields that are used to skip bits, but
9645 handle C++ anonymous unions. */
9646 if (DECL_NAME (decl) != NULL_TREE
9647 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9649 gen_type_die (member_declared_type (decl), context_die);
9650 gen_field_die (decl, context_die);
9655 gen_type_die (TREE_TYPE (decl), context_die);
9656 gen_formal_parameter_die (decl, context_die);
9664 /* Write the debugging output for DECL. */
9667 dwarf2out_decl (decl)
9670 register dw_die_ref context_die = comp_unit_die;
9672 if (TREE_CODE (decl) == ERROR_MARK)
9675 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9676 hope that the node in question doesn't represent a function definition.
9677 If it does, then totally ignoring it is bound to screw up our count of
9678 blocks, and that in turn will completely screw up the labels we will
9679 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9680 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9681 own sequence numbers with them!) */
9682 if (DECL_IGNORED_P (decl))
9684 if (TREE_CODE (decl) == FUNCTION_DECL
9685 && DECL_INITIAL (decl) != NULL)
9691 switch (TREE_CODE (decl))
9694 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9695 builtin function. Explicit programmer-supplied declarations of
9696 these same functions should NOT be ignored however. */
9697 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9700 /* What we would really like to do here is to filter out all mere
9701 file-scope declarations of file-scope functions which are never
9702 referenced later within this translation unit (and keep all of ones
9703 that *are* referenced later on) but we aren't clairvoyant, so we have
9704 no idea which functions will be referenced in the future (i.e. later
9705 on within the current translation unit). So here we just ignore all
9706 file-scope function declarations which are not also definitions. If
9707 and when the debugger needs to know something about these functions,
9708 it will have to hunt around and find the DWARF information associated
9709 with the definition of the function. Note that we can't just check
9710 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9711 definitions and which ones represent mere declarations. We have to
9712 check `DECL_INITIAL' instead. That's because the C front-end
9713 supports some weird semantics for "extern inline" function
9714 definitions. These can get inlined within the current translation
9715 unit (an thus, we need to generate DWARF info for their abstract
9716 instances so that the DWARF info for the concrete inlined instances
9717 can have something to refer to) but the compiler never generates any
9718 out-of-lines instances of such things (despite the fact that they
9719 *are* definitions). The important point is that the C front-end
9720 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9721 to generate DWARF for them anyway. Note that the C++ front-end also
9722 plays some similar games for inline function definitions appearing
9723 within include files which also contain
9724 `#pragma interface' pragmas. */
9725 if (DECL_INITIAL (decl) == NULL_TREE)
9728 /* If we're a nested function, initially use a parent of NULL; if we're
9729 a plain function, this will be fixed up in decls_for_scope. If
9730 we're a method, it will be ignored, since we already have a DIE. */
9731 if (decl_function_context (decl))
9737 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9738 declaration and if the declaration was never even referenced from
9739 within this entire compilation unit. We suppress these DIEs in
9740 order to save space in the .debug section (by eliminating entries
9741 which are probably useless). Note that we must not suppress
9742 block-local extern declarations (whether used or not) because that
9743 would screw-up the debugger's name lookup mechanism and cause it to
9744 miss things which really ought to be in scope at a given point. */
9745 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9748 /* If we are in terse mode, don't generate any DIEs to represent any
9749 variable declarations or definitions. */
9750 if (debug_info_level <= DINFO_LEVEL_TERSE)
9755 /* Don't bother trying to generate any DIEs to represent any of the
9756 normal built-in types for the language we are compiling. */
9757 if (DECL_SOURCE_LINE (decl) == 0)
9759 /* OK, we need to generate one for `bool' so GDB knows what type
9760 comparisons have. */
9761 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9762 == DW_LANG_C_plus_plus)
9763 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9764 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9769 /* If we are in terse mode, don't generate any DIEs for types. */
9770 if (debug_info_level <= DINFO_LEVEL_TERSE)
9773 /* If we're a function-scope tag, initially use a parent of NULL;
9774 this will be fixed up in decls_for_scope. */
9775 if (decl_function_context (decl))
9784 gen_decl_die (decl, context_die);
9785 output_pending_types_for_scope (comp_unit_die);
9788 /* Output a marker (i.e. a label) for the beginning of the generated code for
9792 dwarf2out_begin_block (blocknum)
9793 register unsigned blocknum;
9795 function_section (current_function_decl);
9796 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9799 /* Output a marker (i.e. a label) for the end of the generated code for a
9803 dwarf2out_end_block (blocknum)
9804 register unsigned blocknum;
9806 function_section (current_function_decl);
9807 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9810 /* Output a marker (i.e. a label) at a point in the assembly code which
9811 corresponds to a given source level label. */
9814 dwarf2out_label (insn)
9817 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9819 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9821 function_section (current_function_decl);
9822 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9823 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9824 (unsigned) INSN_UID (insn));
9828 /* Lookup a filename (in the list of filenames that we know about here in
9829 dwarf2out.c) and return its "index". The index of each (known) filename is
9830 just a unique number which is associated with only that one filename.
9831 We need such numbers for the sake of generating labels
9832 (in the .debug_sfnames section) and references to those
9833 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9834 If the filename given as an argument is not found in our current list,
9835 add it to the list and assign it the next available unique index number.
9836 In order to speed up searches, we remember the index of the filename
9837 was looked up last. This handles the majority of all searches. */
9840 lookup_filename (file_name)
9841 const char *file_name;
9843 static unsigned last_file_lookup_index = 0;
9844 register unsigned i;
9846 /* Check to see if the file name that was searched on the previous call
9847 matches this file name. If so, return the index. */
9848 if (last_file_lookup_index != 0)
9849 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9850 return last_file_lookup_index;
9852 /* Didn't match the previous lookup, search the table */
9853 for (i = 1; i < file_table_in_use; ++i)
9854 if (strcmp (file_name, file_table[i]) == 0)
9856 last_file_lookup_index = i;
9860 /* Prepare to add a new table entry by making sure there is enough space in
9861 the table to do so. If not, expand the current table. */
9862 if (file_table_in_use == file_table_allocated)
9864 file_table_allocated += FILE_TABLE_INCREMENT;
9866 = (char **) xrealloc (file_table,
9867 file_table_allocated * sizeof (char *));
9870 /* Add the new entry to the end of the filename table. */
9871 file_table[file_table_in_use] = xstrdup (file_name);
9872 last_file_lookup_index = file_table_in_use++;
9874 return last_file_lookup_index;
9877 /* Output a label to mark the beginning of a source code line entry
9878 and record information relating to this source line, in
9879 'line_info_table' for later output of the .debug_line section. */
9882 dwarf2out_line (filename, line)
9883 register const char *filename;
9884 register unsigned line;
9886 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9888 function_section (current_function_decl);
9890 if (DWARF2_ASM_LINE_DEBUG_INFO)
9892 static const char *lastfile;
9894 /* Emit the .file and .loc directives understood by GNU as. */
9895 if (lastfile == 0 || strcmp (filename, lastfile))
9897 fprintf (asm_out_file, "\t.file 0 \"%s\"\n", filename);
9898 lastfile = filename;
9901 fprintf (asm_out_file, "\t.loc 0 %d 0\n", line);
9903 /* Indicate that line number info exists. */
9904 ++line_info_table_in_use;
9906 /* Indicate that multiple line number tables exist. */
9907 if (DECL_SECTION_NAME (current_function_decl))
9908 ++separate_line_info_table_in_use;
9910 else if (DECL_SECTION_NAME (current_function_decl))
9912 register dw_separate_line_info_ref line_info;
9913 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9914 separate_line_info_table_in_use);
9916 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
9917 fputc ('\n', asm_out_file);
9919 /* expand the line info table if necessary */
9920 if (separate_line_info_table_in_use
9921 == separate_line_info_table_allocated)
9923 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9924 separate_line_info_table
9925 = (dw_separate_line_info_ref)
9926 xrealloc (separate_line_info_table,
9927 separate_line_info_table_allocated
9928 * sizeof (dw_separate_line_info_entry));
9931 /* Add the new entry at the end of the line_info_table. */
9933 = &separate_line_info_table[separate_line_info_table_in_use++];
9934 line_info->dw_file_num = lookup_filename (filename);
9935 line_info->dw_line_num = line;
9936 line_info->function = current_funcdef_number;
9940 register dw_line_info_ref line_info;
9942 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9943 line_info_table_in_use);
9945 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
9946 fputc ('\n', asm_out_file);
9948 /* Expand the line info table if necessary. */
9949 if (line_info_table_in_use == line_info_table_allocated)
9951 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9953 = (dw_line_info_ref)
9954 xrealloc (line_info_table,
9955 (line_info_table_allocated
9956 * sizeof (dw_line_info_entry)));
9959 /* Add the new entry at the end of the line_info_table. */
9960 line_info = &line_info_table[line_info_table_in_use++];
9961 line_info->dw_file_num = lookup_filename (filename);
9962 line_info->dw_line_num = line;
9967 /* Record the beginning of a new source file, for later output
9968 of the .debug_macinfo section. At present, unimplemented. */
9971 dwarf2out_start_source_file (filename)
9972 register const char *filename ATTRIBUTE_UNUSED;
9976 /* Record the end of a source file, for later output
9977 of the .debug_macinfo section. At present, unimplemented. */
9980 dwarf2out_end_source_file ()
9984 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9985 the tail part of the directive line, i.e. the part which is past the
9986 initial whitespace, #, whitespace, directive-name, whitespace part. */
9989 dwarf2out_define (lineno, buffer)
9990 register unsigned lineno ATTRIBUTE_UNUSED;
9991 register const char *buffer ATTRIBUTE_UNUSED;
9993 static int initialized = 0;
9996 dwarf2out_start_source_file (primary_filename);
10001 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10002 the tail part of the directive line, i.e. the part which is past the
10003 initial whitespace, #, whitespace, directive-name, whitespace part. */
10006 dwarf2out_undef (lineno, buffer)
10007 register unsigned lineno ATTRIBUTE_UNUSED;
10008 register const char *buffer ATTRIBUTE_UNUSED;
10012 /* Set up for Dwarf output at the start of compilation. */
10015 dwarf2out_init (asm_out_file, main_input_filename)
10016 register FILE *asm_out_file;
10017 register char *main_input_filename;
10019 /* Remember the name of the primary input file. */
10020 primary_filename = main_input_filename;
10022 /* Allocate the initial hunk of the file_table. */
10023 file_table = (char **) xcalloc (FILE_TABLE_INCREMENT, sizeof (char *));
10024 file_table_allocated = FILE_TABLE_INCREMENT;
10026 /* Skip the first entry - file numbers begin at 1. */
10027 file_table_in_use = 1;
10029 /* Allocate the initial hunk of the decl_die_table. */
10031 = (dw_die_ref *) xcalloc (DECL_DIE_TABLE_INCREMENT, sizeof (dw_die_ref));
10032 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
10033 decl_die_table_in_use = 0;
10035 /* Allocate the initial hunk of the decl_scope_table. */
10037 = (decl_scope_node *) xcalloc (DECL_SCOPE_TABLE_INCREMENT,
10038 sizeof (decl_scope_node));
10039 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
10040 decl_scope_depth = 0;
10042 /* Allocate the initial hunk of the abbrev_die_table. */
10044 = (dw_die_ref *) xcalloc (ABBREV_DIE_TABLE_INCREMENT,
10045 sizeof (dw_die_ref));
10046 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
10047 /* Zero-th entry is allocated, but unused */
10048 abbrev_die_table_in_use = 1;
10050 /* Allocate the initial hunk of the line_info_table. */
10052 = (dw_line_info_ref) xcalloc (LINE_INFO_TABLE_INCREMENT,
10053 sizeof (dw_line_info_entry));
10054 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
10055 /* Zero-th entry is allocated, but unused */
10056 line_info_table_in_use = 1;
10058 /* Generate the initial DIE for the .debug section. Note that the (string)
10059 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
10060 will (typically) be a relative pathname and that this pathname should be
10061 taken as being relative to the directory from which the compiler was
10062 invoked when the given (base) source file was compiled. */
10063 gen_compile_unit_die (main_input_filename);
10065 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
10066 ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, ABBREV_SECTION_LABEL, 0);
10067 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10068 ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0);
10070 strcpy (text_section_label, stripattributes (TEXT_SECTION));
10071 ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label,
10072 DEBUG_INFO_SECTION_LABEL, 0);
10073 ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label,
10074 DEBUG_LINE_SECTION_LABEL, 0);
10076 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10077 ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
10078 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10079 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10080 ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
10081 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10082 ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
10083 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10084 ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
10087 /* Output stuff that dwarf requires at the end of every file,
10088 and generate the DWARF-2 debugging info. */
10091 dwarf2out_finish ()
10093 limbo_die_node *node, *next_node;
10097 /* Traverse the limbo die list, and add parent/child links. The only
10098 dies without parents that should be here are concrete instances of
10099 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
10100 For concrete instances, we can get the parent die from the abstract
10102 for (node = limbo_die_list; node; node = next_node)
10104 next_node = node->next;
10107 if (die->die_parent == NULL)
10109 a = get_AT (die, DW_AT_abstract_origin);
10111 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
10112 else if (die == comp_unit_die)
10120 /* Walk through the list of incomplete types again, trying once more to
10121 emit full debugging info for them. */
10122 retry_incomplete_types ();
10124 /* Traverse the DIE tree and add sibling attributes to those DIE's
10125 that have children. */
10126 add_sibling_attributes (comp_unit_die);
10128 /* Output a terminator label for the .text section. */
10129 fputc ('\n', asm_out_file);
10130 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10131 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
10134 /* Output a terminator label for the .data section. */
10135 fputc ('\n', asm_out_file);
10136 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
10137 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
10139 /* Output a terminator label for the .bss section. */
10140 fputc ('\n', asm_out_file);
10141 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
10142 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
10145 /* Output the source line correspondence table. */
10146 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
10148 if (! DWARF2_ASM_LINE_DEBUG_INFO)
10150 fputc ('\n', asm_out_file);
10151 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10152 output_line_info ();
10155 /* We can only use the low/high_pc attributes if all of the code
10157 if (separate_line_info_table_in_use == 0)
10159 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label);
10160 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
10163 add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list,
10164 debug_line_section_label);
10167 /* Output the abbreviation table. */
10168 fputc ('\n', asm_out_file);
10169 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10170 build_abbrev_table (comp_unit_die);
10171 output_abbrev_section ();
10173 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
10174 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
10175 calc_die_sizes (comp_unit_die);
10177 /* Output debugging information. */
10178 fputc ('\n', asm_out_file);
10179 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10180 output_compilation_unit_header ();
10181 output_die (comp_unit_die);
10183 if (pubname_table_in_use)
10185 /* Output public names table. */
10186 fputc ('\n', asm_out_file);
10187 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
10188 output_pubnames ();
10191 /* We only put functions in the arange table, so don't write it out if
10192 we don't have any. */
10193 if (fde_table_in_use)
10195 /* Output the address range information. */
10196 fputc ('\n', asm_out_file);
10197 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
10201 #endif /* DWARF2_DEBUGGING_INFO */