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 == '\\') \
483 if (c >= ' ' && c < 0177) \
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 #if !defined (EH_FRAME_SECTION)
1678 #if defined (EH_FRAME_SECTION_ASM_OP)
1679 #define EH_FRAME_SECTION() eh_frame_section();
1681 #if defined (ASM_OUTPUT_SECTION_NAME)
1682 #define EH_FRAME_SECTION() \
1684 named_section (NULL_TREE, ".eh_frame", 0); \
1690 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
1691 #if !defined (HAS_INIT_SECTION) && !defined (INIT_SECTION_ASM_OP)
1692 #undef EH_FRAME_SECTION
1695 /* Output the call frame information used to used to record information
1696 that relates to calculating the frame pointer, and records the
1697 location of saved registers. */
1700 output_call_frame_info (for_eh)
1703 register unsigned long i;
1704 register dw_fde_ref fde;
1705 register dw_cfi_ref cfi;
1706 char l1[20], l2[20];
1707 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1711 /* Do we want to include a pointer to the exception table? */
1712 int eh_ptr = for_eh && exception_table_p ();
1714 fputc ('\n', asm_out_file);
1716 /* We're going to be generating comments, so turn on app. */
1722 #ifdef EH_FRAME_SECTION
1723 EH_FRAME_SECTION ();
1725 tree label = get_file_function_name ('F');
1727 force_data_section ();
1728 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1729 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1730 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1732 assemble_label ("__FRAME_BEGIN__");
1735 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1737 /* Output the CIE. */
1738 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1739 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1740 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1741 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1743 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1745 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1748 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1750 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1753 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1756 fputc ('\n', asm_out_file);
1757 ASM_OUTPUT_LABEL (asm_out_file, l1);
1760 /* Now that the CIE pointer is PC-relative for EH,
1761 use 0 to identify the CIE. */
1762 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1764 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1767 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1769 fputc ('\n', asm_out_file);
1770 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1772 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1773 fputc ('\n', asm_out_file);
1776 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1778 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1780 fputc ('\n', asm_out_file);
1783 /* The CIE contains a pointer to the exception region info for the
1784 frame. Make the augmentation string three bytes (including the
1785 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1786 can't handle unaligned relocs. */
1789 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1790 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1794 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1796 fputc ('\n', asm_out_file);
1798 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1800 fprintf (asm_out_file, "\t%s pointer to exception region info",
1805 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1807 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1811 fputc ('\n', asm_out_file);
1814 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1816 fputc ('\n', asm_out_file);
1817 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1819 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1821 fputc ('\n', asm_out_file);
1822 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1824 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1826 fputc ('\n', asm_out_file);
1828 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1829 output_cfi (cfi, NULL);
1831 /* Pad the CIE out to an address sized boundary. */
1832 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1833 ASM_OUTPUT_LABEL (asm_out_file, l2);
1834 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1835 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1837 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1838 fputc ('\n', asm_out_file);
1841 /* Loop through all of the FDE's. */
1842 for (i = 0; i < fde_table_in_use; ++i)
1844 fde = &fde_table[i];
1846 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1847 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1848 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1849 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1851 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1853 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1856 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1858 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1861 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1862 fputc ('\n', asm_out_file);
1863 ASM_OUTPUT_LABEL (asm_out_file, l1);
1865 /* ??? This always emits a 4 byte offset when for_eh is true, but it
1866 emits a target dependent sized offset when for_eh is not true.
1867 This inconsistency may confuse gdb. The only case where we need a
1868 non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI
1869 compatibility if we emit a 4 byte offset. We need a 4 byte offset
1870 though in order to be compatible with the dwarf_fde struct in frame.c.
1871 If the for_eh case is changed, then the struct in frame.c has
1872 to be adjusted appropriately. */
1874 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l1, "__FRAME_BEGIN__");
1876 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1878 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1880 fputc ('\n', asm_out_file);
1881 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1883 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1885 fputc ('\n', asm_out_file);
1886 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1887 fde->dw_fde_end, fde->dw_fde_begin);
1889 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1891 fputc ('\n', asm_out_file);
1893 /* Loop through the Call Frame Instructions associated with
1895 fde->dw_fde_current_label = fde->dw_fde_begin;
1896 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1897 output_cfi (cfi, fde);
1899 /* Pad the FDE out to an address sized boundary. */
1900 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1901 ASM_OUTPUT_LABEL (asm_out_file, l2);
1902 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1903 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1905 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1906 fputc ('\n', asm_out_file);
1909 #ifndef EH_FRAME_SECTION
1912 /* Emit terminating zero for table. */
1913 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1914 fputc ('\n', asm_out_file);
1917 #ifdef MIPS_DEBUGGING_INFO
1918 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1919 get a value of 0. Putting .align 0 after the label fixes it. */
1920 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1923 /* Turn off app to make assembly quicker. */
1928 /* Output a marker (i.e. a label) for the beginning of a function, before
1932 dwarf2out_begin_prologue ()
1934 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1935 register dw_fde_ref fde;
1937 ++current_funcdef_number;
1939 function_section (current_function_decl);
1940 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1941 current_funcdef_number);
1942 ASM_OUTPUT_LABEL (asm_out_file, label);
1944 /* Expand the fde table if necessary. */
1945 if (fde_table_in_use == fde_table_allocated)
1947 fde_table_allocated += FDE_TABLE_INCREMENT;
1949 = (dw_fde_ref) xrealloc (fde_table,
1950 fde_table_allocated * sizeof (dw_fde_node));
1953 /* Record the FDE associated with this function. */
1954 current_funcdef_fde = fde_table_in_use;
1956 /* Add the new FDE at the end of the fde_table. */
1957 fde = &fde_table[fde_table_in_use++];
1958 fde->dw_fde_begin = xstrdup (label);
1959 fde->dw_fde_current_label = NULL;
1960 fde->dw_fde_end = NULL;
1961 fde->dw_fde_cfi = NULL;
1963 args_size = old_args_size = 0;
1966 /* Output a marker (i.e. a label) for the absolute end of the generated code
1967 for a function definition. This gets called *after* the epilogue code has
1971 dwarf2out_end_epilogue ()
1974 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1976 /* Output a label to mark the endpoint of the code generated for this
1978 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
1979 ASM_OUTPUT_LABEL (asm_out_file, label);
1980 fde = &fde_table[fde_table_in_use - 1];
1981 fde->dw_fde_end = xstrdup (label);
1985 dwarf2out_frame_init ()
1987 /* Allocate the initial hunk of the fde_table. */
1989 = (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1990 bzero ((char *) fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1991 fde_table_allocated = FDE_TABLE_INCREMENT;
1992 fde_table_in_use = 0;
1994 /* Generate the CFA instructions common to all FDE's. Do it now for the
1995 sake of lookup_cfa. */
1997 #ifdef DWARF2_UNWIND_INFO
1998 /* On entry, the Canonical Frame Address is at SP. */
1999 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
2000 initial_return_save (INCOMING_RETURN_ADDR_RTX);
2005 dwarf2out_frame_finish ()
2007 /* Output call frame information. */
2008 #ifdef MIPS_DEBUGGING_INFO
2009 if (write_symbols == DWARF2_DEBUG)
2010 output_call_frame_info (0);
2011 if (flag_exceptions && ! exceptions_via_longjmp)
2012 output_call_frame_info (1);
2014 if (write_symbols == DWARF2_DEBUG
2015 || (flag_exceptions && ! exceptions_via_longjmp))
2016 output_call_frame_info (1);
2020 #endif /* .debug_frame support */
2022 /* And now, the support for symbolic debugging information. */
2023 #ifdef DWARF2_DEBUGGING_INFO
2025 extern char *getpwd PROTO((void));
2027 /* NOTE: In the comments in this file, many references are made to
2028 "Debugging Information Entries". This term is abbreviated as `DIE'
2029 throughout the remainder of this file. */
2031 /* An internal representation of the DWARF output is built, and then
2032 walked to generate the DWARF debugging info. The walk of the internal
2033 representation is done after the entire program has been compiled.
2034 The types below are used to describe the internal representation. */
2036 /* Each DIE may have a series of attribute/value pairs. Values
2037 can take on several forms. The forms that are used in this
2038 implementation are listed below. */
2045 dw_val_class_unsigned_const,
2046 dw_val_class_long_long,
2049 dw_val_class_die_ref,
2050 dw_val_class_fde_ref,
2051 dw_val_class_lbl_id,
2052 dw_val_class_lbl_offset,
2057 /* Various DIE's use offsets relative to the beginning of the
2058 .debug_info section to refer to each other. */
2060 typedef long int dw_offset;
2062 /* Define typedefs here to avoid circular dependencies. */
2064 typedef struct die_struct *dw_die_ref;
2065 typedef struct dw_attr_struct *dw_attr_ref;
2066 typedef struct dw_val_struct *dw_val_ref;
2067 typedef struct dw_line_info_struct *dw_line_info_ref;
2068 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2069 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2070 typedef struct pubname_struct *pubname_ref;
2071 typedef dw_die_ref *arange_ref;
2073 /* Describe a double word constant value. */
2075 typedef struct dw_long_long_struct
2082 /* Describe a floating point constant value. */
2084 typedef struct dw_fp_struct
2091 /* Each entry in the line_info_table maintains the file and
2092 line number associated with the label generated for that
2093 entry. The label gives the PC value associated with
2094 the line number entry. */
2096 typedef struct dw_line_info_struct
2098 unsigned long dw_file_num;
2099 unsigned long dw_line_num;
2103 /* Line information for functions in separate sections; each one gets its
2105 typedef struct dw_separate_line_info_struct
2107 unsigned long dw_file_num;
2108 unsigned long dw_line_num;
2109 unsigned long function;
2111 dw_separate_line_info_entry;
2113 /* The dw_val_node describes an attribute's value, as it is
2114 represented internally. */
2116 typedef struct dw_val_struct
2118 dw_val_class val_class;
2122 dw_loc_descr_ref val_loc;
2124 long unsigned val_unsigned;
2125 dw_long_long_const val_long_long;
2126 dw_float_const val_float;
2127 dw_die_ref val_die_ref;
2128 unsigned val_fde_index;
2131 unsigned char val_flag;
2137 /* Locations in memory are described using a sequence of stack machine
2140 typedef struct dw_loc_descr_struct
2142 dw_loc_descr_ref dw_loc_next;
2143 enum dwarf_location_atom dw_loc_opc;
2144 dw_val_node dw_loc_oprnd1;
2145 dw_val_node dw_loc_oprnd2;
2149 /* Each DIE attribute has a field specifying the attribute kind,
2150 a link to the next attribute in the chain, and an attribute value.
2151 Attributes are typically linked below the DIE they modify. */
2153 typedef struct dw_attr_struct
2155 enum dwarf_attribute dw_attr;
2156 dw_attr_ref dw_attr_next;
2157 dw_val_node dw_attr_val;
2161 /* The Debugging Information Entry (DIE) structure */
2163 typedef struct die_struct
2165 enum dwarf_tag die_tag;
2166 dw_attr_ref die_attr;
2167 dw_attr_ref die_attr_last;
2168 dw_die_ref die_parent;
2169 dw_die_ref die_child;
2170 dw_die_ref die_child_last;
2172 dw_offset die_offset;
2173 unsigned long die_abbrev;
2177 /* The pubname structure */
2179 typedef struct pubname_struct
2186 /* The limbo die list structure. */
2187 typedef struct limbo_die_struct
2190 struct limbo_die_struct *next;
2194 /* How to start an assembler comment. */
2195 #ifndef ASM_COMMENT_START
2196 #define ASM_COMMENT_START ";#"
2199 /* Define a macro which returns non-zero for a TYPE_DECL which was
2200 implicitly generated for a tagged type.
2202 Note that unlike the gcc front end (which generates a NULL named
2203 TYPE_DECL node for each complete tagged type, each array type, and
2204 each function type node created) the g++ front end generates a
2205 _named_ TYPE_DECL node for each tagged type node created.
2206 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2207 generate a DW_TAG_typedef DIE for them. */
2209 #define TYPE_DECL_IS_STUB(decl) \
2210 (DECL_NAME (decl) == NULL_TREE \
2211 || (DECL_ARTIFICIAL (decl) \
2212 && is_tagged_type (TREE_TYPE (decl)) \
2213 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2214 /* This is necessary for stub decls that \
2215 appear in nested inline functions. */ \
2216 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2217 && (decl_ultimate_origin (decl) \
2218 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2220 /* Information concerning the compilation unit's programming
2221 language, and compiler version. */
2223 extern int flag_traditional;
2224 extern char *version_string;
2225 extern char *language_string;
2227 /* Fixed size portion of the DWARF compilation unit header. */
2228 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2230 /* Fixed size portion of debugging line information prolog. */
2231 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2233 /* Fixed size portion of public names info. */
2234 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2236 /* Fixed size portion of the address range info. */
2237 #define DWARF_ARANGES_HEADER_SIZE \
2238 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2240 /* Define the architecture-dependent minimum instruction length (in bytes).
2241 In this implementation of DWARF, this field is used for information
2242 purposes only. Since GCC generates assembly language, we have
2243 no a priori knowledge of how many instruction bytes are generated
2244 for each source line, and therefore can use only the DW_LNE_set_address
2245 and DW_LNS_fixed_advance_pc line information commands. */
2247 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2248 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2251 /* Minimum line offset in a special line info. opcode.
2252 This value was chosen to give a reasonable range of values. */
2253 #define DWARF_LINE_BASE -10
2255 /* First special line opcde - leave room for the standard opcodes. */
2256 #define DWARF_LINE_OPCODE_BASE 10
2258 /* Range of line offsets in a special line info. opcode. */
2259 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2261 /* Flag that indicates the initial value of the is_stmt_start flag.
2262 In the present implementation, we do not mark any lines as
2263 the beginning of a source statement, because that information
2264 is not made available by the GCC front-end. */
2265 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2267 /* This location is used by calc_die_sizes() to keep track
2268 the offset of each DIE within the .debug_info section. */
2269 static unsigned long next_die_offset;
2271 /* Record the root of the DIE's built for the current compilation unit. */
2272 static dw_die_ref comp_unit_die;
2274 /* A list of DIEs with a NULL parent waiting to be relocated. */
2275 static limbo_die_node *limbo_die_list = 0;
2277 /* Pointer to an array of filenames referenced by this compilation unit. */
2278 static char **file_table;
2280 /* Total number of entries in the table (i.e. array) pointed to by
2281 `file_table'. This is the *total* and includes both used and unused
2283 static unsigned file_table_allocated;
2285 /* Number of entries in the file_table which are actually in use. */
2286 static unsigned file_table_in_use;
2288 /* Size (in elements) of increments by which we may expand the filename
2290 #define FILE_TABLE_INCREMENT 64
2292 /* Local pointer to the name of the main input file. Initialized in
2294 static char *primary_filename;
2296 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2297 which their beginnings are encountered. We output Dwarf debugging info
2298 that refers to the beginnings and ends of the ranges of code for each
2299 lexical block. The labels themselves are generated in final.c, which
2300 assigns numbers to the blocks in the same way. */
2301 static unsigned next_block_number = 2;
2303 /* A pointer to the base of a table of references to DIE's that describe
2304 declarations. The table is indexed by DECL_UID() which is a unique
2305 number identifying each decl. */
2306 static dw_die_ref *decl_die_table;
2308 /* Number of elements currently allocated for the decl_die_table. */
2309 static unsigned decl_die_table_allocated;
2311 /* Number of elements in decl_die_table currently in use. */
2312 static unsigned decl_die_table_in_use;
2314 /* Size (in elements) of increments by which we may expand the
2316 #define DECL_DIE_TABLE_INCREMENT 256
2318 /* Structure used for the decl_scope table. scope is the current declaration
2319 scope, and previous is the entry that is the parent of this scope. This
2320 is usually but not always the immediately preceeding entry. */
2322 typedef struct decl_scope_struct
2329 /* A pointer to the base of a table of references to declaration
2330 scopes. This table is a display which tracks the nesting
2331 of declaration scopes at the current scope and containing
2332 scopes. This table is used to find the proper place to
2333 define type declaration DIE's. */
2334 static decl_scope_node *decl_scope_table;
2336 /* Number of elements currently allocated for the decl_scope_table. */
2337 static int decl_scope_table_allocated;
2339 /* Current level of nesting of declaration scopes. */
2340 static int decl_scope_depth;
2342 /* Size (in elements) of increments by which we may expand the
2343 decl_scope_table. */
2344 #define DECL_SCOPE_TABLE_INCREMENT 64
2346 /* A pointer to the base of a list of references to DIE's that
2347 are uniquely identified by their tag, presence/absence of
2348 children DIE's, and list of attribute/value pairs. */
2349 static dw_die_ref *abbrev_die_table;
2351 /* Number of elements currently allocated for abbrev_die_table. */
2352 static unsigned abbrev_die_table_allocated;
2354 /* Number of elements in type_die_table currently in use. */
2355 static unsigned abbrev_die_table_in_use;
2357 /* Size (in elements) of increments by which we may expand the
2358 abbrev_die_table. */
2359 #define ABBREV_DIE_TABLE_INCREMENT 256
2361 /* A pointer to the base of a table that contains line information
2362 for each source code line in .text in the compilation unit. */
2363 static dw_line_info_ref line_info_table;
2365 /* Number of elements currently allocated for line_info_table. */
2366 static unsigned line_info_table_allocated;
2368 /* Number of elements in separate_line_info_table currently in use. */
2369 static unsigned separate_line_info_table_in_use;
2371 /* A pointer to the base of a table that contains line information
2372 for each source code line outside of .text in the compilation unit. */
2373 static dw_separate_line_info_ref separate_line_info_table;
2375 /* Number of elements currently allocated for separate_line_info_table. */
2376 static unsigned separate_line_info_table_allocated;
2378 /* Number of elements in line_info_table currently in use. */
2379 static unsigned line_info_table_in_use;
2381 /* Size (in elements) of increments by which we may expand the
2383 #define LINE_INFO_TABLE_INCREMENT 1024
2385 /* A pointer to the base of a table that contains a list of publicly
2386 accessible names. */
2387 static pubname_ref pubname_table;
2389 /* Number of elements currently allocated for pubname_table. */
2390 static unsigned pubname_table_allocated;
2392 /* Number of elements in pubname_table currently in use. */
2393 static unsigned pubname_table_in_use;
2395 /* Size (in elements) of increments by which we may expand the
2397 #define PUBNAME_TABLE_INCREMENT 64
2399 /* A pointer to the base of a table that contains a list of publicly
2400 accessible names. */
2401 static arange_ref arange_table;
2403 /* Number of elements currently allocated for arange_table. */
2404 static unsigned arange_table_allocated;
2406 /* Number of elements in arange_table currently in use. */
2407 static unsigned arange_table_in_use;
2409 /* Size (in elements) of increments by which we may expand the
2411 #define ARANGE_TABLE_INCREMENT 64
2413 /* A pointer to the base of a list of pending types which we haven't
2414 generated DIEs for yet, but which we will have to come back to
2417 static tree *pending_types_list;
2419 /* Number of elements currently allocated for the pending_types_list. */
2420 static unsigned pending_types_allocated;
2422 /* Number of elements of pending_types_list currently in use. */
2423 static unsigned pending_types;
2425 /* Size (in elements) of increments by which we may expand the pending
2426 types list. Actually, a single hunk of space of this size should
2427 be enough for most typical programs. */
2428 #define PENDING_TYPES_INCREMENT 64
2430 /* A pointer to the base of a list of incomplete types which might be
2431 completed at some later time. */
2433 static tree *incomplete_types_list;
2435 /* Number of elements currently allocated for the incomplete_types_list. */
2436 static unsigned incomplete_types_allocated;
2438 /* Number of elements of incomplete_types_list currently in use. */
2439 static unsigned incomplete_types;
2441 /* Size (in elements) of increments by which we may expand the incomplete
2442 types list. Actually, a single hunk of space of this size should
2443 be enough for most typical programs. */
2444 #define INCOMPLETE_TYPES_INCREMENT 64
2446 /* Record whether the function being analyzed contains inlined functions. */
2447 static int current_function_has_inlines;
2448 #if 0 && defined (MIPS_DEBUGGING_INFO)
2449 static int comp_unit_has_inlines;
2452 /* A pointer to the ..._DECL node which we have most recently been working
2453 on. We keep this around just in case something about it looks screwy and
2454 we want to tell the user what the source coordinates for the actual
2456 static tree dwarf_last_decl;
2458 /* Forward declarations for functions defined in this file. */
2460 static void addr_const_to_string PROTO((dyn_string_t, rtx));
2461 static char *addr_to_string PROTO((rtx));
2462 static int is_pseudo_reg PROTO((rtx));
2463 static tree type_main_variant PROTO((tree));
2464 static int is_tagged_type PROTO((tree));
2465 static const char *dwarf_tag_name PROTO((unsigned));
2466 static const char *dwarf_attr_name PROTO((unsigned));
2467 static const char *dwarf_form_name PROTO((unsigned));
2468 static const char *dwarf_stack_op_name PROTO((unsigned));
2470 static const char *dwarf_type_encoding_name PROTO((unsigned));
2472 static tree decl_ultimate_origin PROTO((tree));
2473 static tree block_ultimate_origin PROTO((tree));
2474 static tree decl_class_context PROTO((tree));
2475 static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
2476 static void add_AT_flag PROTO((dw_die_ref,
2477 enum dwarf_attribute,
2479 static void add_AT_int PROTO((dw_die_ref,
2480 enum dwarf_attribute, long));
2481 static void add_AT_unsigned PROTO((dw_die_ref,
2482 enum dwarf_attribute,
2484 static void add_AT_long_long PROTO((dw_die_ref,
2485 enum dwarf_attribute,
2486 unsigned long, unsigned long));
2487 static void add_AT_float PROTO((dw_die_ref,
2488 enum dwarf_attribute,
2490 static void add_AT_string PROTO((dw_die_ref,
2491 enum dwarf_attribute,
2493 static void add_AT_die_ref PROTO((dw_die_ref,
2494 enum dwarf_attribute,
2496 static void add_AT_fde_ref PROTO((dw_die_ref,
2497 enum dwarf_attribute,
2499 static void add_AT_loc PROTO((dw_die_ref,
2500 enum dwarf_attribute,
2502 static void add_AT_addr PROTO((dw_die_ref,
2503 enum dwarf_attribute, char *));
2504 static void add_AT_lbl_id PROTO((dw_die_ref,
2505 enum dwarf_attribute, char *));
2506 static void add_AT_lbl_offset PROTO((dw_die_ref,
2507 enum dwarf_attribute, char *));
2508 static int is_extern_subr_die PROTO((dw_die_ref));
2509 static dw_attr_ref get_AT PROTO((dw_die_ref,
2510 enum dwarf_attribute));
2511 static char *get_AT_low_pc PROTO((dw_die_ref));
2512 static char *get_AT_hi_pc PROTO((dw_die_ref));
2513 static char *get_AT_string PROTO((dw_die_ref,
2514 enum dwarf_attribute));
2515 static int get_AT_flag PROTO((dw_die_ref,
2516 enum dwarf_attribute));
2517 static unsigned get_AT_unsigned PROTO((dw_die_ref,
2518 enum dwarf_attribute));
2519 static int is_c_family PROTO((void));
2520 static int is_fortran PROTO((void));
2521 static void remove_AT PROTO((dw_die_ref,
2522 enum dwarf_attribute));
2523 static void remove_children PROTO((dw_die_ref));
2524 static void add_child_die PROTO((dw_die_ref, dw_die_ref));
2525 static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
2526 static dw_die_ref lookup_type_die PROTO((tree));
2527 static void equate_type_number_to_die PROTO((tree, dw_die_ref));
2528 static dw_die_ref lookup_decl_die PROTO((tree));
2529 static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
2530 static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
2531 unsigned long, unsigned long));
2532 static void add_loc_descr PROTO((dw_loc_descr_ref *,
2534 static void print_spaces PROTO((FILE *));
2535 static void print_die PROTO((dw_die_ref, FILE *));
2536 static void print_dwarf_line_table PROTO((FILE *));
2537 static void add_sibling_attributes PROTO((dw_die_ref));
2538 static void build_abbrev_table PROTO((dw_die_ref));
2539 static unsigned long size_of_string PROTO((char *));
2540 static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
2541 static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
2542 static int constant_size PROTO((long unsigned));
2543 static unsigned long size_of_die PROTO((dw_die_ref));
2544 static void calc_die_sizes PROTO((dw_die_ref));
2545 static unsigned long size_of_line_prolog PROTO((void));
2546 static unsigned long size_of_line_info PROTO((void));
2547 static unsigned long size_of_pubnames PROTO((void));
2548 static unsigned long size_of_aranges PROTO((void));
2549 static enum dwarf_form value_format PROTO((dw_val_ref));
2550 static void output_value_format PROTO((dw_val_ref));
2551 static void output_abbrev_section PROTO((void));
2552 static void output_loc_operands PROTO((dw_loc_descr_ref));
2553 static unsigned long sibling_offset PROTO((dw_die_ref));
2554 static void output_die PROTO((dw_die_ref));
2555 static void output_compilation_unit_header PROTO((void));
2556 static const char *dwarf2_name PROTO((tree, int));
2557 static void add_pubname PROTO((tree, dw_die_ref));
2558 static void output_pubnames PROTO((void));
2559 static void add_arange PROTO((tree, dw_die_ref));
2560 static void output_aranges PROTO((void));
2561 static void output_line_info PROTO((void));
2562 static int is_body_block PROTO((tree));
2563 static dw_die_ref base_type_die PROTO((tree));
2564 static tree root_type PROTO((tree));
2565 static int is_base_type PROTO((tree));
2566 static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
2567 static int type_is_enum PROTO((tree));
2568 static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
2569 static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
2570 static int is_based_loc PROTO((rtx));
2571 static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx));
2572 static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
2573 static dw_loc_descr_ref loc_descriptor PROTO((rtx));
2574 static unsigned ceiling PROTO((unsigned, unsigned));
2575 static tree field_type PROTO((tree));
2576 static unsigned simple_type_align_in_bits PROTO((tree));
2577 static unsigned simple_type_size_in_bits PROTO((tree));
2578 static unsigned field_byte_offset PROTO((tree));
2579 static void add_AT_location_description PROTO((dw_die_ref,
2580 enum dwarf_attribute, rtx));
2581 static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
2582 static void add_const_value_attribute PROTO((dw_die_ref, rtx));
2583 static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
2584 static void add_name_attribute PROTO((dw_die_ref, const char *));
2585 static void add_bound_info PROTO((dw_die_ref,
2586 enum dwarf_attribute, tree));
2587 static void add_subscript_info PROTO((dw_die_ref, tree));
2588 static void add_byte_size_attribute PROTO((dw_die_ref, tree));
2589 static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
2590 static void add_bit_size_attribute PROTO((dw_die_ref, tree));
2591 static void add_prototyped_attribute PROTO((dw_die_ref, tree));
2592 static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
2593 static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
2594 static void add_src_coords_attributes PROTO((dw_die_ref, tree));
2595 static void add_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
2596 static void push_decl_scope PROTO((tree));
2597 static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
2598 static void pop_decl_scope PROTO((void));
2599 static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
2601 static char *type_tag PROTO((tree));
2602 static tree member_declared_type PROTO((tree));
2604 static char *decl_start_label PROTO((tree));
2606 static void gen_array_type_die PROTO((tree, dw_die_ref));
2607 static void gen_set_type_die PROTO((tree, dw_die_ref));
2609 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2611 static void pend_type PROTO((tree));
2612 static void output_pending_types_for_scope PROTO((dw_die_ref));
2613 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2614 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2615 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2616 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2617 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2618 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2619 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2620 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2621 static void gen_variable_die PROTO((tree, dw_die_ref));
2622 static void gen_label_die PROTO((tree, dw_die_ref));
2623 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2624 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2625 static void gen_field_die PROTO((tree, dw_die_ref));
2626 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2627 static void gen_compile_unit_die PROTO((char *));
2628 static void gen_string_type_die PROTO((tree, dw_die_ref));
2629 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2630 static void gen_member_die PROTO((tree, dw_die_ref));
2631 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2632 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2633 static void gen_typedef_die PROTO((tree, dw_die_ref));
2634 static void gen_type_die PROTO((tree, dw_die_ref));
2635 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2636 static void gen_block_die PROTO((tree, dw_die_ref, int));
2637 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2638 static int is_redundant_typedef PROTO((tree));
2639 static void gen_decl_die PROTO((tree, dw_die_ref));
2640 static unsigned lookup_filename PROTO((const char *));
2641 static void add_incomplete_type PROTO((tree));
2642 static void retry_incomplete_types PROTO((void));
2644 /* Section names used to hold DWARF debugging information. */
2645 #ifndef DEBUG_INFO_SECTION
2646 #define DEBUG_INFO_SECTION ".debug_info"
2648 #ifndef ABBREV_SECTION
2649 #define ABBREV_SECTION ".debug_abbrev"
2651 #ifndef ARANGES_SECTION
2652 #define ARANGES_SECTION ".debug_aranges"
2654 #ifndef DW_MACINFO_SECTION
2655 #define DW_MACINFO_SECTION ".debug_macinfo"
2657 #ifndef DEBUG_LINE_SECTION
2658 #define DEBUG_LINE_SECTION ".debug_line"
2661 #define LOC_SECTION ".debug_loc"
2663 #ifndef PUBNAMES_SECTION
2664 #define PUBNAMES_SECTION ".debug_pubnames"
2667 #define STR_SECTION ".debug_str"
2670 /* Standard ELF section names for compiled code and data. */
2671 #ifndef TEXT_SECTION
2672 #define TEXT_SECTION ".text"
2674 #ifndef DATA_SECTION
2675 #define DATA_SECTION ".data"
2678 #define BSS_SECTION ".bss"
2681 /* Labels we insert at beginning sections we can reference instead of
2682 the section names themselves. */
2684 #ifndef TEXT_SECTION_LABEL
2685 #define TEXT_SECTION_LABEL "Ltext"
2687 #ifndef DEBUG_LINE_SECTION_LABEL
2688 #define DEBUG_LINE_SECTION_LABEL "Ldebug_line"
2690 #ifndef DEBUG_INFO_SECTION_LABEL
2691 #define DEBUG_INFO_SECTION_LABEL "Ldebug_info"
2693 #ifndef ABBREV_SECTION_LABEL
2694 #define ABBREV_SECTION_LABEL "Ldebug_abbrev"
2698 /* Definitions of defaults for formats and names of various special
2699 (artificial) labels which may be generated within this file (when the -g
2700 options is used and DWARF_DEBUGGING_INFO is in effect.
2701 If necessary, these may be overridden from within the tm.h file, but
2702 typically, overriding these defaults is unnecessary. */
2704 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2705 static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2706 static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2707 static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2708 static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
2710 #ifndef TEXT_END_LABEL
2711 #define TEXT_END_LABEL "Letext"
2713 #ifndef DATA_END_LABEL
2714 #define DATA_END_LABEL "Ledata"
2716 #ifndef BSS_END_LABEL
2717 #define BSS_END_LABEL "Lebss"
2719 #ifndef INSN_LABEL_FMT
2720 #define INSN_LABEL_FMT "LI%u_"
2722 #ifndef BLOCK_BEGIN_LABEL
2723 #define BLOCK_BEGIN_LABEL "LBB"
2725 #ifndef BLOCK_END_LABEL
2726 #define BLOCK_END_LABEL "LBE"
2728 #ifndef BODY_BEGIN_LABEL
2729 #define BODY_BEGIN_LABEL "Lbb"
2731 #ifndef BODY_END_LABEL
2732 #define BODY_END_LABEL "Lbe"
2734 #ifndef LINE_CODE_LABEL
2735 #define LINE_CODE_LABEL "LM"
2737 #ifndef SEPARATE_LINE_CODE_LABEL
2738 #define SEPARATE_LINE_CODE_LABEL "LSM"
2741 /* Convert a reference to the assembler name of a C-level name. This
2742 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2743 a string rather than writing to a file. */
2744 #ifndef ASM_NAME_TO_STRING
2745 #define ASM_NAME_TO_STRING(STR, NAME) \
2747 if ((NAME)[0] == '*') \
2748 dyn_string_append (STR, NAME + 1); \
2751 const char *newstr; \
2752 STRIP_NAME_ENCODING (newstr, NAME); \
2753 dyn_string_append (STR, user_label_prefix); \
2754 dyn_string_append (STR, newstr); \
2760 /* Convert an integer constant expression into assembler syntax. Addition
2761 and subtraction are the only arithmetic that may appear in these
2762 expressions. This is an adaptation of output_addr_const in final.c.
2763 Here, the target of the conversion is a string buffer. We can't use
2764 output_addr_const directly, because it writes to a file. */
2767 addr_const_to_string (str, x)
2774 switch (GET_CODE (x))
2778 dyn_string_append (str, ",");
2784 ASM_NAME_TO_STRING (str, XSTR (x, 0));
2788 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2789 ASM_NAME_TO_STRING (str, buf1);
2793 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2794 ASM_NAME_TO_STRING (str, buf1);
2798 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2799 dyn_string_append (str, buf1);
2803 /* This used to output parentheses around the expression, but that does
2804 not work on the 386 (either ATT or BSD assembler). */
2805 addr_const_to_string (str, XEXP (x, 0));
2809 if (GET_MODE (x) == VOIDmode)
2811 /* We can use %d if the number is one word and positive. */
2812 if (CONST_DOUBLE_HIGH (x))
2813 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2814 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2815 else if (CONST_DOUBLE_LOW (x) < 0)
2816 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2818 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2819 CONST_DOUBLE_LOW (x));
2820 dyn_string_append (str, buf1);
2823 /* We can't handle floating point constants; PRINT_OPERAND must
2825 output_operand_lossage ("floating constant misused");
2829 /* Some assemblers need integer constants to appear last (eg masm). */
2830 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2832 addr_const_to_string (str, XEXP (x, 1));
2833 if (INTVAL (XEXP (x, 0)) >= 0)
2834 dyn_string_append (str, "+");
2836 addr_const_to_string (str, XEXP (x, 0));
2840 addr_const_to_string (str, XEXP (x, 0));
2841 if (INTVAL (XEXP (x, 1)) >= 0)
2842 dyn_string_append (str, "+");
2844 addr_const_to_string (str, XEXP (x, 1));
2849 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2850 can't handle that. */
2851 x = simplify_subtraction (x);
2852 if (GET_CODE (x) != MINUS)
2855 addr_const_to_string (str, XEXP (x, 0));
2856 dyn_string_append (str, "-");
2857 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2858 && INTVAL (XEXP (x, 1)) < 0)
2860 dyn_string_append (str, ASM_OPEN_PAREN);
2861 addr_const_to_string (str, XEXP (x, 1));
2862 dyn_string_append (str, ASM_CLOSE_PAREN);
2865 addr_const_to_string (str, XEXP (x, 1));
2870 addr_const_to_string (str, XEXP (x, 0));
2874 output_operand_lossage ("invalid expression as operand");
2878 /* Convert an address constant to a string, and return a pointer to
2879 a copy of the result, located on the heap. */
2885 dyn_string_t ds = dyn_string_new (256);
2888 addr_const_to_string (ds, x);
2890 /* Return the dynamically allocated string, but free the
2891 dyn_string_t itself. */
2897 /* Test if rtl node points to a pseudo register. */
2903 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2904 || ((GET_CODE (rtl) == SUBREG)
2905 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2908 /* Return a reference to a type, with its const and volatile qualifiers
2912 type_main_variant (type)
2915 type = TYPE_MAIN_VARIANT (type);
2917 /* There really should be only one main variant among any group of variants
2918 of a given type (and all of the MAIN_VARIANT values for all members of
2919 the group should point to that one type) but sometimes the C front-end
2920 messes this up for array types, so we work around that bug here. */
2922 if (TREE_CODE (type) == ARRAY_TYPE)
2923 while (type != TYPE_MAIN_VARIANT (type))
2924 type = TYPE_MAIN_VARIANT (type);
2929 /* Return non-zero if the given type node represents a tagged type. */
2932 is_tagged_type (type)
2935 register enum tree_code code = TREE_CODE (type);
2937 return (code == RECORD_TYPE || code == UNION_TYPE
2938 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2941 /* Convert a DIE tag into its string name. */
2944 dwarf_tag_name (tag)
2945 register unsigned tag;
2949 case DW_TAG_padding:
2950 return "DW_TAG_padding";
2951 case DW_TAG_array_type:
2952 return "DW_TAG_array_type";
2953 case DW_TAG_class_type:
2954 return "DW_TAG_class_type";
2955 case DW_TAG_entry_point:
2956 return "DW_TAG_entry_point";
2957 case DW_TAG_enumeration_type:
2958 return "DW_TAG_enumeration_type";
2959 case DW_TAG_formal_parameter:
2960 return "DW_TAG_formal_parameter";
2961 case DW_TAG_imported_declaration:
2962 return "DW_TAG_imported_declaration";
2964 return "DW_TAG_label";
2965 case DW_TAG_lexical_block:
2966 return "DW_TAG_lexical_block";
2968 return "DW_TAG_member";
2969 case DW_TAG_pointer_type:
2970 return "DW_TAG_pointer_type";
2971 case DW_TAG_reference_type:
2972 return "DW_TAG_reference_type";
2973 case DW_TAG_compile_unit:
2974 return "DW_TAG_compile_unit";
2975 case DW_TAG_string_type:
2976 return "DW_TAG_string_type";
2977 case DW_TAG_structure_type:
2978 return "DW_TAG_structure_type";
2979 case DW_TAG_subroutine_type:
2980 return "DW_TAG_subroutine_type";
2981 case DW_TAG_typedef:
2982 return "DW_TAG_typedef";
2983 case DW_TAG_union_type:
2984 return "DW_TAG_union_type";
2985 case DW_TAG_unspecified_parameters:
2986 return "DW_TAG_unspecified_parameters";
2987 case DW_TAG_variant:
2988 return "DW_TAG_variant";
2989 case DW_TAG_common_block:
2990 return "DW_TAG_common_block";
2991 case DW_TAG_common_inclusion:
2992 return "DW_TAG_common_inclusion";
2993 case DW_TAG_inheritance:
2994 return "DW_TAG_inheritance";
2995 case DW_TAG_inlined_subroutine:
2996 return "DW_TAG_inlined_subroutine";
2998 return "DW_TAG_module";
2999 case DW_TAG_ptr_to_member_type:
3000 return "DW_TAG_ptr_to_member_type";
3001 case DW_TAG_set_type:
3002 return "DW_TAG_set_type";
3003 case DW_TAG_subrange_type:
3004 return "DW_TAG_subrange_type";
3005 case DW_TAG_with_stmt:
3006 return "DW_TAG_with_stmt";
3007 case DW_TAG_access_declaration:
3008 return "DW_TAG_access_declaration";
3009 case DW_TAG_base_type:
3010 return "DW_TAG_base_type";
3011 case DW_TAG_catch_block:
3012 return "DW_TAG_catch_block";
3013 case DW_TAG_const_type:
3014 return "DW_TAG_const_type";
3015 case DW_TAG_constant:
3016 return "DW_TAG_constant";
3017 case DW_TAG_enumerator:
3018 return "DW_TAG_enumerator";
3019 case DW_TAG_file_type:
3020 return "DW_TAG_file_type";
3022 return "DW_TAG_friend";
3023 case DW_TAG_namelist:
3024 return "DW_TAG_namelist";
3025 case DW_TAG_namelist_item:
3026 return "DW_TAG_namelist_item";
3027 case DW_TAG_packed_type:
3028 return "DW_TAG_packed_type";
3029 case DW_TAG_subprogram:
3030 return "DW_TAG_subprogram";
3031 case DW_TAG_template_type_param:
3032 return "DW_TAG_template_type_param";
3033 case DW_TAG_template_value_param:
3034 return "DW_TAG_template_value_param";
3035 case DW_TAG_thrown_type:
3036 return "DW_TAG_thrown_type";
3037 case DW_TAG_try_block:
3038 return "DW_TAG_try_block";
3039 case DW_TAG_variant_part:
3040 return "DW_TAG_variant_part";
3041 case DW_TAG_variable:
3042 return "DW_TAG_variable";
3043 case DW_TAG_volatile_type:
3044 return "DW_TAG_volatile_type";
3045 case DW_TAG_MIPS_loop:
3046 return "DW_TAG_MIPS_loop";
3047 case DW_TAG_format_label:
3048 return "DW_TAG_format_label";
3049 case DW_TAG_function_template:
3050 return "DW_TAG_function_template";
3051 case DW_TAG_class_template:
3052 return "DW_TAG_class_template";
3054 return "DW_TAG_<unknown>";
3058 /* Convert a DWARF attribute code into its string name. */
3061 dwarf_attr_name (attr)
3062 register unsigned attr;
3067 return "DW_AT_sibling";
3068 case DW_AT_location:
3069 return "DW_AT_location";
3071 return "DW_AT_name";
3072 case DW_AT_ordering:
3073 return "DW_AT_ordering";
3074 case DW_AT_subscr_data:
3075 return "DW_AT_subscr_data";
3076 case DW_AT_byte_size:
3077 return "DW_AT_byte_size";
3078 case DW_AT_bit_offset:
3079 return "DW_AT_bit_offset";
3080 case DW_AT_bit_size:
3081 return "DW_AT_bit_size";
3082 case DW_AT_element_list:
3083 return "DW_AT_element_list";
3084 case DW_AT_stmt_list:
3085 return "DW_AT_stmt_list";
3087 return "DW_AT_low_pc";
3089 return "DW_AT_high_pc";
3090 case DW_AT_language:
3091 return "DW_AT_language";
3093 return "DW_AT_member";
3095 return "DW_AT_discr";
3096 case DW_AT_discr_value:
3097 return "DW_AT_discr_value";
3098 case DW_AT_visibility:
3099 return "DW_AT_visibility";
3101 return "DW_AT_import";
3102 case DW_AT_string_length:
3103 return "DW_AT_string_length";
3104 case DW_AT_common_reference:
3105 return "DW_AT_common_reference";
3106 case DW_AT_comp_dir:
3107 return "DW_AT_comp_dir";
3108 case DW_AT_const_value:
3109 return "DW_AT_const_value";
3110 case DW_AT_containing_type:
3111 return "DW_AT_containing_type";
3112 case DW_AT_default_value:
3113 return "DW_AT_default_value";
3115 return "DW_AT_inline";
3116 case DW_AT_is_optional:
3117 return "DW_AT_is_optional";
3118 case DW_AT_lower_bound:
3119 return "DW_AT_lower_bound";
3120 case DW_AT_producer:
3121 return "DW_AT_producer";
3122 case DW_AT_prototyped:
3123 return "DW_AT_prototyped";
3124 case DW_AT_return_addr:
3125 return "DW_AT_return_addr";
3126 case DW_AT_start_scope:
3127 return "DW_AT_start_scope";
3128 case DW_AT_stride_size:
3129 return "DW_AT_stride_size";
3130 case DW_AT_upper_bound:
3131 return "DW_AT_upper_bound";
3132 case DW_AT_abstract_origin:
3133 return "DW_AT_abstract_origin";
3134 case DW_AT_accessibility:
3135 return "DW_AT_accessibility";
3136 case DW_AT_address_class:
3137 return "DW_AT_address_class";
3138 case DW_AT_artificial:
3139 return "DW_AT_artificial";
3140 case DW_AT_base_types:
3141 return "DW_AT_base_types";
3142 case DW_AT_calling_convention:
3143 return "DW_AT_calling_convention";
3145 return "DW_AT_count";
3146 case DW_AT_data_member_location:
3147 return "DW_AT_data_member_location";
3148 case DW_AT_decl_column:
3149 return "DW_AT_decl_column";
3150 case DW_AT_decl_file:
3151 return "DW_AT_decl_file";
3152 case DW_AT_decl_line:
3153 return "DW_AT_decl_line";
3154 case DW_AT_declaration:
3155 return "DW_AT_declaration";
3156 case DW_AT_discr_list:
3157 return "DW_AT_discr_list";
3158 case DW_AT_encoding:
3159 return "DW_AT_encoding";
3160 case DW_AT_external:
3161 return "DW_AT_external";
3162 case DW_AT_frame_base:
3163 return "DW_AT_frame_base";
3165 return "DW_AT_friend";
3166 case DW_AT_identifier_case:
3167 return "DW_AT_identifier_case";
3168 case DW_AT_macro_info:
3169 return "DW_AT_macro_info";
3170 case DW_AT_namelist_items:
3171 return "DW_AT_namelist_items";
3172 case DW_AT_priority:
3173 return "DW_AT_priority";
3175 return "DW_AT_segment";
3176 case DW_AT_specification:
3177 return "DW_AT_specification";
3178 case DW_AT_static_link:
3179 return "DW_AT_static_link";
3181 return "DW_AT_type";
3182 case DW_AT_use_location:
3183 return "DW_AT_use_location";
3184 case DW_AT_variable_parameter:
3185 return "DW_AT_variable_parameter";
3186 case DW_AT_virtuality:
3187 return "DW_AT_virtuality";
3188 case DW_AT_vtable_elem_location:
3189 return "DW_AT_vtable_elem_location";
3191 case DW_AT_MIPS_fde:
3192 return "DW_AT_MIPS_fde";
3193 case DW_AT_MIPS_loop_begin:
3194 return "DW_AT_MIPS_loop_begin";
3195 case DW_AT_MIPS_tail_loop_begin:
3196 return "DW_AT_MIPS_tail_loop_begin";
3197 case DW_AT_MIPS_epilog_begin:
3198 return "DW_AT_MIPS_epilog_begin";
3199 case DW_AT_MIPS_loop_unroll_factor:
3200 return "DW_AT_MIPS_loop_unroll_factor";
3201 case DW_AT_MIPS_software_pipeline_depth:
3202 return "DW_AT_MIPS_software_pipeline_depth";
3203 case DW_AT_MIPS_linkage_name:
3204 return "DW_AT_MIPS_linkage_name";
3205 case DW_AT_MIPS_stride:
3206 return "DW_AT_MIPS_stride";
3207 case DW_AT_MIPS_abstract_name:
3208 return "DW_AT_MIPS_abstract_name";
3209 case DW_AT_MIPS_clone_origin:
3210 return "DW_AT_MIPS_clone_origin";
3211 case DW_AT_MIPS_has_inlines:
3212 return "DW_AT_MIPS_has_inlines";
3214 case DW_AT_sf_names:
3215 return "DW_AT_sf_names";
3216 case DW_AT_src_info:
3217 return "DW_AT_src_info";
3218 case DW_AT_mac_info:
3219 return "DW_AT_mac_info";
3220 case DW_AT_src_coords:
3221 return "DW_AT_src_coords";
3222 case DW_AT_body_begin:
3223 return "DW_AT_body_begin";
3224 case DW_AT_body_end:
3225 return "DW_AT_body_end";
3227 return "DW_AT_<unknown>";
3231 /* Convert a DWARF value form code into its string name. */
3234 dwarf_form_name (form)
3235 register unsigned form;
3240 return "DW_FORM_addr";
3241 case DW_FORM_block2:
3242 return "DW_FORM_block2";
3243 case DW_FORM_block4:
3244 return "DW_FORM_block4";
3246 return "DW_FORM_data2";
3248 return "DW_FORM_data4";
3250 return "DW_FORM_data8";
3251 case DW_FORM_string:
3252 return "DW_FORM_string";
3254 return "DW_FORM_block";
3255 case DW_FORM_block1:
3256 return "DW_FORM_block1";
3258 return "DW_FORM_data1";
3260 return "DW_FORM_flag";
3262 return "DW_FORM_sdata";
3264 return "DW_FORM_strp";
3266 return "DW_FORM_udata";
3267 case DW_FORM_ref_addr:
3268 return "DW_FORM_ref_addr";
3270 return "DW_FORM_ref1";
3272 return "DW_FORM_ref2";
3274 return "DW_FORM_ref4";
3276 return "DW_FORM_ref8";
3277 case DW_FORM_ref_udata:
3278 return "DW_FORM_ref_udata";
3279 case DW_FORM_indirect:
3280 return "DW_FORM_indirect";
3282 return "DW_FORM_<unknown>";
3286 /* Convert a DWARF stack opcode into its string name. */
3289 dwarf_stack_op_name (op)
3290 register unsigned op;
3295 return "DW_OP_addr";
3297 return "DW_OP_deref";
3299 return "DW_OP_const1u";
3301 return "DW_OP_const1s";
3303 return "DW_OP_const2u";
3305 return "DW_OP_const2s";
3307 return "DW_OP_const4u";
3309 return "DW_OP_const4s";
3311 return "DW_OP_const8u";
3313 return "DW_OP_const8s";
3315 return "DW_OP_constu";
3317 return "DW_OP_consts";
3321 return "DW_OP_drop";
3323 return "DW_OP_over";
3325 return "DW_OP_pick";
3327 return "DW_OP_swap";
3331 return "DW_OP_xderef";
3339 return "DW_OP_minus";
3351 return "DW_OP_plus";
3352 case DW_OP_plus_uconst:
3353 return "DW_OP_plus_uconst";
3359 return "DW_OP_shra";
3377 return "DW_OP_skip";
3379 return "DW_OP_lit0";
3381 return "DW_OP_lit1";
3383 return "DW_OP_lit2";
3385 return "DW_OP_lit3";
3387 return "DW_OP_lit4";
3389 return "DW_OP_lit5";
3391 return "DW_OP_lit6";
3393 return "DW_OP_lit7";
3395 return "DW_OP_lit8";
3397 return "DW_OP_lit9";
3399 return "DW_OP_lit10";
3401 return "DW_OP_lit11";
3403 return "DW_OP_lit12";
3405 return "DW_OP_lit13";
3407 return "DW_OP_lit14";
3409 return "DW_OP_lit15";
3411 return "DW_OP_lit16";
3413 return "DW_OP_lit17";
3415 return "DW_OP_lit18";
3417 return "DW_OP_lit19";
3419 return "DW_OP_lit20";
3421 return "DW_OP_lit21";
3423 return "DW_OP_lit22";
3425 return "DW_OP_lit23";
3427 return "DW_OP_lit24";
3429 return "DW_OP_lit25";
3431 return "DW_OP_lit26";
3433 return "DW_OP_lit27";
3435 return "DW_OP_lit28";
3437 return "DW_OP_lit29";
3439 return "DW_OP_lit30";
3441 return "DW_OP_lit31";
3443 return "DW_OP_reg0";
3445 return "DW_OP_reg1";
3447 return "DW_OP_reg2";
3449 return "DW_OP_reg3";
3451 return "DW_OP_reg4";
3453 return "DW_OP_reg5";
3455 return "DW_OP_reg6";
3457 return "DW_OP_reg7";
3459 return "DW_OP_reg8";
3461 return "DW_OP_reg9";
3463 return "DW_OP_reg10";
3465 return "DW_OP_reg11";
3467 return "DW_OP_reg12";
3469 return "DW_OP_reg13";
3471 return "DW_OP_reg14";
3473 return "DW_OP_reg15";
3475 return "DW_OP_reg16";
3477 return "DW_OP_reg17";
3479 return "DW_OP_reg18";
3481 return "DW_OP_reg19";
3483 return "DW_OP_reg20";
3485 return "DW_OP_reg21";
3487 return "DW_OP_reg22";
3489 return "DW_OP_reg23";
3491 return "DW_OP_reg24";
3493 return "DW_OP_reg25";
3495 return "DW_OP_reg26";
3497 return "DW_OP_reg27";
3499 return "DW_OP_reg28";
3501 return "DW_OP_reg29";
3503 return "DW_OP_reg30";
3505 return "DW_OP_reg31";
3507 return "DW_OP_breg0";
3509 return "DW_OP_breg1";
3511 return "DW_OP_breg2";
3513 return "DW_OP_breg3";
3515 return "DW_OP_breg4";
3517 return "DW_OP_breg5";
3519 return "DW_OP_breg6";
3521 return "DW_OP_breg7";
3523 return "DW_OP_breg8";
3525 return "DW_OP_breg9";
3527 return "DW_OP_breg10";
3529 return "DW_OP_breg11";
3531 return "DW_OP_breg12";
3533 return "DW_OP_breg13";
3535 return "DW_OP_breg14";
3537 return "DW_OP_breg15";
3539 return "DW_OP_breg16";
3541 return "DW_OP_breg17";
3543 return "DW_OP_breg18";
3545 return "DW_OP_breg19";
3547 return "DW_OP_breg20";
3549 return "DW_OP_breg21";
3551 return "DW_OP_breg22";
3553 return "DW_OP_breg23";
3555 return "DW_OP_breg24";
3557 return "DW_OP_breg25";
3559 return "DW_OP_breg26";
3561 return "DW_OP_breg27";
3563 return "DW_OP_breg28";
3565 return "DW_OP_breg29";
3567 return "DW_OP_breg30";
3569 return "DW_OP_breg31";
3571 return "DW_OP_regx";
3573 return "DW_OP_fbreg";
3575 return "DW_OP_bregx";
3577 return "DW_OP_piece";
3578 case DW_OP_deref_size:
3579 return "DW_OP_deref_size";
3580 case DW_OP_xderef_size:
3581 return "DW_OP_xderef_size";
3585 return "OP_<unknown>";
3589 /* Convert a DWARF type code into its string name. */
3593 dwarf_type_encoding_name (enc)
3594 register unsigned enc;
3598 case DW_ATE_address:
3599 return "DW_ATE_address";
3600 case DW_ATE_boolean:
3601 return "DW_ATE_boolean";
3602 case DW_ATE_complex_float:
3603 return "DW_ATE_complex_float";
3605 return "DW_ATE_float";
3607 return "DW_ATE_signed";
3608 case DW_ATE_signed_char:
3609 return "DW_ATE_signed_char";
3610 case DW_ATE_unsigned:
3611 return "DW_ATE_unsigned";
3612 case DW_ATE_unsigned_char:
3613 return "DW_ATE_unsigned_char";
3615 return "DW_ATE_<unknown>";
3620 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3621 instance of an inlined instance of a decl which is local to an inline
3622 function, so we have to trace all of the way back through the origin chain
3623 to find out what sort of node actually served as the original seed for the
3627 decl_ultimate_origin (decl)
3630 #ifdef ENABLE_CHECKING
3631 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
3632 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
3633 most distant ancestor, this should never happen. */
3637 return DECL_ABSTRACT_ORIGIN (decl);
3640 /* Determine the "ultimate origin" of a block. The block may be an inlined
3641 instance of an inlined instance of a block which is local to an inline
3642 function, so we have to trace all of the way back through the origin chain
3643 to find out what sort of node actually served as the original seed for the
3647 block_ultimate_origin (block)
3648 register tree block;
3650 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3652 if (immediate_origin == NULL_TREE)
3656 register tree ret_val;
3657 register tree lookahead = immediate_origin;
3661 ret_val = lookahead;
3662 lookahead = (TREE_CODE (ret_val) == BLOCK)
3663 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3666 while (lookahead != NULL && lookahead != ret_val);
3672 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3673 of a virtual function may refer to a base class, so we check the 'this'
3677 decl_class_context (decl)
3680 tree context = NULL_TREE;
3682 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3683 context = DECL_CONTEXT (decl);
3685 context = TYPE_MAIN_VARIANT
3686 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3688 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3689 context = NULL_TREE;
3694 /* Add an attribute/value pair to a DIE */
3697 add_dwarf_attr (die, attr)
3698 register dw_die_ref die;
3699 register dw_attr_ref attr;
3701 if (die != NULL && attr != NULL)
3703 if (die->die_attr == NULL)
3705 die->die_attr = attr;
3706 die->die_attr_last = attr;
3710 die->die_attr_last->dw_attr_next = attr;
3711 die->die_attr_last = attr;
3716 /* Add a flag value attribute to a DIE. */
3719 add_AT_flag (die, attr_kind, flag)
3720 register dw_die_ref die;
3721 register enum dwarf_attribute attr_kind;
3722 register unsigned flag;
3724 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3726 attr->dw_attr_next = NULL;
3727 attr->dw_attr = attr_kind;
3728 attr->dw_attr_val.val_class = dw_val_class_flag;
3729 attr->dw_attr_val.v.val_flag = flag;
3730 add_dwarf_attr (die, attr);
3733 /* Add a signed integer attribute value to a DIE. */
3736 add_AT_int (die, attr_kind, int_val)
3737 register dw_die_ref die;
3738 register enum dwarf_attribute attr_kind;
3739 register long int int_val;
3741 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3743 attr->dw_attr_next = NULL;
3744 attr->dw_attr = attr_kind;
3745 attr->dw_attr_val.val_class = dw_val_class_const;
3746 attr->dw_attr_val.v.val_int = int_val;
3747 add_dwarf_attr (die, attr);
3750 /* Add an unsigned integer attribute value to a DIE. */
3753 add_AT_unsigned (die, attr_kind, unsigned_val)
3754 register dw_die_ref die;
3755 register enum dwarf_attribute attr_kind;
3756 register unsigned long unsigned_val;
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_unsigned_const;
3763 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3764 add_dwarf_attr (die, attr);
3767 /* Add an unsigned double integer attribute value to a DIE. */
3770 add_AT_long_long (die, attr_kind, val_hi, val_low)
3771 register dw_die_ref die;
3772 register enum dwarf_attribute attr_kind;
3773 register unsigned long val_hi;
3774 register unsigned long val_low;
3776 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3778 attr->dw_attr_next = NULL;
3779 attr->dw_attr = attr_kind;
3780 attr->dw_attr_val.val_class = dw_val_class_long_long;
3781 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3782 attr->dw_attr_val.v.val_long_long.low = val_low;
3783 add_dwarf_attr (die, attr);
3786 /* Add a floating point attribute value to a DIE and return it. */
3789 add_AT_float (die, attr_kind, length, array)
3790 register dw_die_ref die;
3791 register enum dwarf_attribute attr_kind;
3792 register unsigned length;
3793 register long *array;
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_float;
3800 attr->dw_attr_val.v.val_float.length = length;
3801 attr->dw_attr_val.v.val_float.array = array;
3802 add_dwarf_attr (die, attr);
3805 /* Add a string attribute value to a DIE. */
3808 add_AT_string (die, attr_kind, str)
3809 register dw_die_ref die;
3810 register enum dwarf_attribute attr_kind;
3811 register const char *str;
3813 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3815 attr->dw_attr_next = NULL;
3816 attr->dw_attr = attr_kind;
3817 attr->dw_attr_val.val_class = dw_val_class_str;
3818 attr->dw_attr_val.v.val_str = xstrdup (str);
3819 add_dwarf_attr (die, attr);
3822 /* Add a DIE reference attribute value to a DIE. */
3825 add_AT_die_ref (die, attr_kind, targ_die)
3826 register dw_die_ref die;
3827 register enum dwarf_attribute attr_kind;
3828 register dw_die_ref targ_die;
3830 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3832 attr->dw_attr_next = NULL;
3833 attr->dw_attr = attr_kind;
3834 attr->dw_attr_val.val_class = dw_val_class_die_ref;
3835 attr->dw_attr_val.v.val_die_ref = targ_die;
3836 add_dwarf_attr (die, attr);
3839 /* Add an FDE reference attribute value to a DIE. */
3842 add_AT_fde_ref (die, attr_kind, targ_fde)
3843 register dw_die_ref die;
3844 register enum dwarf_attribute attr_kind;
3845 register unsigned targ_fde;
3847 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3849 attr->dw_attr_next = NULL;
3850 attr->dw_attr = attr_kind;
3851 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
3852 attr->dw_attr_val.v.val_fde_index = targ_fde;
3853 add_dwarf_attr (die, attr);
3856 /* Add a location description attribute value to a DIE. */
3859 add_AT_loc (die, attr_kind, loc)
3860 register dw_die_ref die;
3861 register enum dwarf_attribute attr_kind;
3862 register dw_loc_descr_ref loc;
3864 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3866 attr->dw_attr_next = NULL;
3867 attr->dw_attr = attr_kind;
3868 attr->dw_attr_val.val_class = dw_val_class_loc;
3869 attr->dw_attr_val.v.val_loc = loc;
3870 add_dwarf_attr (die, attr);
3873 /* Add an address constant attribute value to a DIE. */
3876 add_AT_addr (die, attr_kind, addr)
3877 register dw_die_ref die;
3878 register enum dwarf_attribute attr_kind;
3881 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3883 attr->dw_attr_next = NULL;
3884 attr->dw_attr = attr_kind;
3885 attr->dw_attr_val.val_class = dw_val_class_addr;
3886 attr->dw_attr_val.v.val_addr = addr;
3887 add_dwarf_attr (die, attr);
3890 /* Add a label identifier attribute value to a DIE. */
3893 add_AT_lbl_id (die, attr_kind, lbl_id)
3894 register dw_die_ref die;
3895 register enum dwarf_attribute attr_kind;
3896 register char *lbl_id;
3898 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3900 attr->dw_attr_next = NULL;
3901 attr->dw_attr = attr_kind;
3902 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3903 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3904 add_dwarf_attr (die, attr);
3907 /* Add a section offset attribute value to a DIE. */
3910 add_AT_lbl_offset (die, attr_kind, label)
3911 register dw_die_ref die;
3912 register enum dwarf_attribute attr_kind;
3913 register char *label;
3915 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3917 attr->dw_attr_next = NULL;
3918 attr->dw_attr = attr_kind;
3919 attr->dw_attr_val.val_class = dw_val_class_lbl_offset;
3920 attr->dw_attr_val.v.val_lbl_id = label;
3921 add_dwarf_attr (die, attr);
3925 /* Test if die refers to an external subroutine. */
3928 is_extern_subr_die (die)
3929 register dw_die_ref die;
3931 register dw_attr_ref a;
3932 register int is_subr = FALSE;
3933 register int is_extern = FALSE;
3935 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3938 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3940 if (a->dw_attr == DW_AT_external
3941 && a->dw_attr_val.val_class == dw_val_class_flag
3942 && a->dw_attr_val.v.val_flag != 0)
3950 return is_subr && is_extern;
3953 /* Get the attribute of type attr_kind. */
3955 static inline dw_attr_ref
3956 get_AT (die, attr_kind)
3957 register dw_die_ref die;
3958 register enum dwarf_attribute attr_kind;
3960 register dw_attr_ref a;
3961 register dw_die_ref spec = NULL;
3965 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3967 if (a->dw_attr == attr_kind)
3970 if (a->dw_attr == DW_AT_specification
3971 || a->dw_attr == DW_AT_abstract_origin)
3972 spec = a->dw_attr_val.v.val_die_ref;
3976 return get_AT (spec, attr_kind);
3982 /* Return the "low pc" attribute value, typically associated with
3983 a subprogram DIE. Return null if the "low pc" attribute is
3984 either not prsent, or if it cannot be represented as an
3985 assembler label identifier. */
3987 static inline char *
3989 register dw_die_ref die;
3991 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3993 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3994 return a->dw_attr_val.v.val_lbl_id;
3999 /* Return the "high pc" attribute value, typically associated with
4000 a subprogram DIE. Return null if the "high pc" attribute is
4001 either not prsent, or if it cannot be represented as an
4002 assembler label identifier. */
4004 static inline char *
4006 register dw_die_ref die;
4008 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
4010 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
4011 return a->dw_attr_val.v.val_lbl_id;
4016 /* Return the value of the string attribute designated by ATTR_KIND, or
4017 NULL if it is not present. */
4019 static inline char *
4020 get_AT_string (die, attr_kind)
4021 register dw_die_ref die;
4022 register enum dwarf_attribute attr_kind;
4024 register dw_attr_ref a = get_AT (die, attr_kind);
4026 if (a && a->dw_attr_val.val_class == dw_val_class_str)
4027 return a->dw_attr_val.v.val_str;
4032 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
4033 if it is not present. */
4036 get_AT_flag (die, attr_kind)
4037 register dw_die_ref die;
4038 register enum dwarf_attribute attr_kind;
4040 register dw_attr_ref a = get_AT (die, attr_kind);
4042 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
4043 return a->dw_attr_val.v.val_flag;
4048 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
4049 if it is not present. */
4051 static inline unsigned
4052 get_AT_unsigned (die, attr_kind)
4053 register dw_die_ref die;
4054 register enum dwarf_attribute attr_kind;
4056 register dw_attr_ref a = get_AT (die, attr_kind);
4058 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
4059 return a->dw_attr_val.v.val_unsigned;
4067 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4069 return (lang == DW_LANG_C || lang == DW_LANG_C89
4070 || lang == DW_LANG_C_plus_plus);
4076 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4078 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
4081 /* Remove the specified attribute if present. */
4084 remove_AT (die, attr_kind)
4085 register dw_die_ref die;
4086 register enum dwarf_attribute attr_kind;
4088 register dw_attr_ref a;
4089 register dw_attr_ref removed = NULL;;
4093 if (die->die_attr->dw_attr == attr_kind)
4095 removed = die->die_attr;
4096 if (die->die_attr_last == die->die_attr)
4097 die->die_attr_last = NULL;
4099 die->die_attr = die->die_attr->dw_attr_next;
4103 for (a = die->die_attr; a->dw_attr_next != NULL;
4104 a = a->dw_attr_next)
4105 if (a->dw_attr_next->dw_attr == attr_kind)
4107 removed = a->dw_attr_next;
4108 if (die->die_attr_last == a->dw_attr_next)
4109 die->die_attr_last = a;
4111 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4120 /* Discard the children of this DIE. */
4123 remove_children (die)
4124 register dw_die_ref die;
4126 register dw_die_ref child_die = die->die_child;
4128 die->die_child = NULL;
4129 die->die_child_last = NULL;
4131 while (child_die != NULL)
4133 register dw_die_ref tmp_die = child_die;
4134 register dw_attr_ref a;
4136 child_die = child_die->die_sib;
4138 for (a = tmp_die->die_attr; a != NULL; )
4140 register dw_attr_ref tmp_a = a;
4142 a = a->dw_attr_next;
4150 /* Add a child DIE below its parent. */
4153 add_child_die (die, child_die)
4154 register dw_die_ref die;
4155 register dw_die_ref child_die;
4157 if (die != NULL && child_die != NULL)
4159 if (die == child_die)
4161 child_die->die_parent = die;
4162 child_die->die_sib = NULL;
4164 if (die->die_child == NULL)
4166 die->die_child = child_die;
4167 die->die_child_last = child_die;
4171 die->die_child_last->die_sib = child_die;
4172 die->die_child_last = child_die;
4177 /* Return a pointer to a newly created DIE node. */
4179 static inline dw_die_ref
4180 new_die (tag_value, parent_die)
4181 register enum dwarf_tag tag_value;
4182 register dw_die_ref parent_die;
4184 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4186 die->die_tag = tag_value;
4187 die->die_abbrev = 0;
4188 die->die_offset = 0;
4189 die->die_child = NULL;
4190 die->die_parent = NULL;
4191 die->die_sib = NULL;
4192 die->die_child_last = NULL;
4193 die->die_attr = NULL;
4194 die->die_attr_last = NULL;
4196 if (parent_die != NULL)
4197 add_child_die (parent_die, die);
4200 limbo_die_node *limbo_node;
4202 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4203 limbo_node->die = die;
4204 limbo_node->next = limbo_die_list;
4205 limbo_die_list = limbo_node;
4211 /* Return the DIE associated with the given type specifier. */
4213 static inline dw_die_ref
4214 lookup_type_die (type)
4217 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4220 /* Equate a DIE to a given type specifier. */
4223 equate_type_number_to_die (type, type_die)
4225 register dw_die_ref type_die;
4227 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4230 /* Return the DIE associated with a given declaration. */
4232 static inline dw_die_ref
4233 lookup_decl_die (decl)
4236 register unsigned decl_id = DECL_UID (decl);
4238 return (decl_id < decl_die_table_in_use
4239 ? decl_die_table[decl_id] : NULL);
4242 /* Equate a DIE to a particular declaration. */
4245 equate_decl_number_to_die (decl, decl_die)
4247 register dw_die_ref decl_die;
4249 register unsigned decl_id = DECL_UID (decl);
4250 register unsigned num_allocated;
4252 if (decl_id >= decl_die_table_allocated)
4255 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4256 / DECL_DIE_TABLE_INCREMENT)
4257 * DECL_DIE_TABLE_INCREMENT;
4260 = (dw_die_ref *) xrealloc (decl_die_table,
4261 sizeof (dw_die_ref) * num_allocated);
4263 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4264 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4265 decl_die_table_allocated = num_allocated;
4268 if (decl_id >= decl_die_table_in_use)
4269 decl_die_table_in_use = (decl_id + 1);
4271 decl_die_table[decl_id] = decl_die;
4274 /* Return a pointer to a newly allocated location description. Location
4275 descriptions are simple expression terms that can be strung
4276 together to form more complicated location (address) descriptions. */
4278 static inline dw_loc_descr_ref
4279 new_loc_descr (op, oprnd1, oprnd2)
4280 register enum dwarf_location_atom op;
4281 register unsigned long oprnd1;
4282 register unsigned long oprnd2;
4284 register dw_loc_descr_ref descr
4285 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4287 descr->dw_loc_next = NULL;
4288 descr->dw_loc_opc = op;
4289 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4290 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4291 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4292 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4297 /* Add a location description term to a location description expression. */
4300 add_loc_descr (list_head, descr)
4301 register dw_loc_descr_ref *list_head;
4302 register dw_loc_descr_ref descr;
4304 register dw_loc_descr_ref *d;
4306 /* Find the end of the chain. */
4307 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4313 /* Keep track of the number of spaces used to indent the
4314 output of the debugging routines that print the structure of
4315 the DIE internal representation. */
4316 static int print_indent;
4318 /* Indent the line the number of spaces given by print_indent. */
4321 print_spaces (outfile)
4324 fprintf (outfile, "%*s", print_indent, "");
4327 /* Print the information associated with a given DIE, and its children.
4328 This routine is a debugging aid only. */
4331 print_die (die, outfile)
4335 register dw_attr_ref a;
4336 register dw_die_ref c;
4338 print_spaces (outfile);
4339 fprintf (outfile, "DIE %4lu: %s\n",
4340 die->die_offset, dwarf_tag_name (die->die_tag));
4341 print_spaces (outfile);
4342 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4343 fprintf (outfile, " offset: %lu\n", die->die_offset);
4345 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4347 print_spaces (outfile);
4348 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4350 switch (a->dw_attr_val.val_class)
4352 case dw_val_class_addr:
4353 fprintf (outfile, "address");
4355 case dw_val_class_loc:
4356 fprintf (outfile, "location descriptor");
4358 case dw_val_class_const:
4359 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4361 case dw_val_class_unsigned_const:
4362 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4364 case dw_val_class_long_long:
4365 fprintf (outfile, "constant (%lu,%lu)",
4366 a->dw_attr_val.v.val_long_long.hi,
4367 a->dw_attr_val.v.val_long_long.low);
4369 case dw_val_class_float:
4370 fprintf (outfile, "floating-point constant");
4372 case dw_val_class_flag:
4373 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4375 case dw_val_class_die_ref:
4376 if (a->dw_attr_val.v.val_die_ref != NULL)
4377 fprintf (outfile, "die -> %lu",
4378 a->dw_attr_val.v.val_die_ref->die_offset);
4380 fprintf (outfile, "die -> <null>");
4382 case dw_val_class_lbl_id:
4383 case dw_val_class_lbl_offset:
4384 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4386 case dw_val_class_str:
4387 if (a->dw_attr_val.v.val_str != NULL)
4388 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4390 fprintf (outfile, "<null>");
4396 fprintf (outfile, "\n");
4399 if (die->die_child != NULL)
4402 for (c = die->die_child; c != NULL; c = c->die_sib)
4403 print_die (c, outfile);
4409 /* Print the contents of the source code line number correspondence table.
4410 This routine is a debugging aid only. */
4413 print_dwarf_line_table (outfile)
4416 register unsigned i;
4417 register dw_line_info_ref line_info;
4419 fprintf (outfile, "\n\nDWARF source line information\n");
4420 for (i = 1; i < line_info_table_in_use; ++i)
4422 line_info = &line_info_table[i];
4423 fprintf (outfile, "%5d: ", i);
4424 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4425 fprintf (outfile, "%6ld", line_info->dw_line_num);
4426 fprintf (outfile, "\n");
4429 fprintf (outfile, "\n\n");
4432 /* Print the information collected for a given DIE. */
4435 debug_dwarf_die (die)
4438 print_die (die, stderr);
4441 /* Print all DWARF information collected for the compilation unit.
4442 This routine is a debugging aid only. */
4448 print_die (comp_unit_die, stderr);
4449 print_dwarf_line_table (stderr);
4452 /* Traverse the DIE, and add a sibling attribute if it may have the
4453 effect of speeding up access to siblings. To save some space,
4454 avoid generating sibling attributes for DIE's without children. */
4457 add_sibling_attributes(die)
4458 register dw_die_ref die;
4460 register dw_die_ref c;
4461 register dw_attr_ref attr;
4462 if (die != comp_unit_die && die->die_child != NULL)
4464 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4465 attr->dw_attr_next = NULL;
4466 attr->dw_attr = DW_AT_sibling;
4467 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4468 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4470 /* Add the sibling link to the front of the attribute list. */
4471 attr->dw_attr_next = die->die_attr;
4472 if (die->die_attr == NULL)
4473 die->die_attr_last = attr;
4475 die->die_attr = attr;
4478 for (c = die->die_child; c != NULL; c = c->die_sib)
4479 add_sibling_attributes (c);
4482 /* The format of each DIE (and its attribute value pairs)
4483 is encoded in an abbreviation table. This routine builds the
4484 abbreviation table and assigns a unique abbreviation id for
4485 each abbreviation entry. The children of each die are visited
4489 build_abbrev_table (die)
4490 register dw_die_ref die;
4492 register unsigned long abbrev_id;
4493 register unsigned long n_alloc;
4494 register dw_die_ref c;
4495 register dw_attr_ref d_attr, a_attr;
4496 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4498 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4500 if (abbrev->die_tag == die->die_tag)
4502 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4504 a_attr = abbrev->die_attr;
4505 d_attr = die->die_attr;
4507 while (a_attr != NULL && d_attr != NULL)
4509 if ((a_attr->dw_attr != d_attr->dw_attr)
4510 || (value_format (&a_attr->dw_attr_val)
4511 != value_format (&d_attr->dw_attr_val)))
4514 a_attr = a_attr->dw_attr_next;
4515 d_attr = d_attr->dw_attr_next;
4518 if (a_attr == NULL && d_attr == NULL)
4524 if (abbrev_id >= abbrev_die_table_in_use)
4526 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4528 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4530 = (dw_die_ref *) xrealloc (abbrev_die_table,
4531 sizeof (dw_die_ref) * n_alloc);
4533 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4534 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4535 abbrev_die_table_allocated = n_alloc;
4538 ++abbrev_die_table_in_use;
4539 abbrev_die_table[abbrev_id] = die;
4542 die->die_abbrev = abbrev_id;
4543 for (c = die->die_child; c != NULL; c = c->die_sib)
4544 build_abbrev_table (c);
4547 /* Return the size of a string, including the null byte.
4549 This used to treat backslashes as escapes, and hence they were not included
4550 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
4551 which treats a backslash as a backslash, escaping it if necessary, and hence
4552 we must include them in the count. */
4554 static unsigned long
4555 size_of_string (str)
4558 return strlen (str) + 1;
4561 /* Return the size of a location descriptor. */
4563 static unsigned long
4564 size_of_loc_descr (loc)
4565 register dw_loc_descr_ref loc;
4567 register unsigned long size = 1;
4569 switch (loc->dw_loc_opc)
4591 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4594 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4599 case DW_OP_plus_uconst:
4600 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4638 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4641 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4644 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4647 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4648 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4651 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4653 case DW_OP_deref_size:
4654 case DW_OP_xderef_size:
4664 /* Return the size of a series of location descriptors. */
4666 static unsigned long
4668 register dw_loc_descr_ref loc;
4670 register unsigned long size = 0;
4672 for (; loc != NULL; loc = loc->dw_loc_next)
4673 size += size_of_loc_descr (loc);
4678 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4681 constant_size (value)
4682 long unsigned value;
4689 log = floor_log2 (value);
4692 log = 1 << (floor_log2 (log) + 1);
4697 /* Return the size of a DIE, as it is represented in the
4698 .debug_info section. */
4700 static unsigned long
4702 register dw_die_ref die;
4704 register unsigned long size = 0;
4705 register dw_attr_ref a;
4707 size += size_of_uleb128 (die->die_abbrev);
4708 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4710 switch (a->dw_attr_val.val_class)
4712 case dw_val_class_addr:
4715 case dw_val_class_loc:
4717 register unsigned long lsize
4718 = size_of_locs (a->dw_attr_val.v.val_loc);
4721 size += constant_size (lsize);
4725 case dw_val_class_const:
4728 case dw_val_class_unsigned_const:
4729 size += constant_size (a->dw_attr_val.v.val_unsigned);
4731 case dw_val_class_long_long:
4732 size += 1 + 8; /* block */
4734 case dw_val_class_float:
4735 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4737 case dw_val_class_flag:
4740 case dw_val_class_die_ref:
4741 size += DWARF_OFFSET_SIZE;
4743 case dw_val_class_fde_ref:
4744 size += DWARF_OFFSET_SIZE;
4746 case dw_val_class_lbl_id:
4749 case dw_val_class_lbl_offset:
4750 size += DWARF_OFFSET_SIZE;
4752 case dw_val_class_str:
4753 size += size_of_string (a->dw_attr_val.v.val_str);
4763 /* Size the debugging information associated with a given DIE.
4764 Visits the DIE's children recursively. Updates the global
4765 variable next_die_offset, on each time through. Uses the
4766 current value of next_die_offset to update the die_offset
4767 field in each DIE. */
4770 calc_die_sizes (die)
4773 register dw_die_ref c;
4774 die->die_offset = next_die_offset;
4775 next_die_offset += size_of_die (die);
4777 for (c = die->die_child; c != NULL; c = c->die_sib)
4780 if (die->die_child != NULL)
4781 /* Count the null byte used to terminate sibling lists. */
4782 next_die_offset += 1;
4785 /* Return the size of the line information prolog generated for the
4786 compilation unit. */
4788 static unsigned long
4789 size_of_line_prolog ()
4791 register unsigned long size;
4792 register unsigned long ft_index;
4794 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4796 /* Count the size of the table giving number of args for each
4798 size += DWARF_LINE_OPCODE_BASE - 1;
4800 /* Include directory table is empty (at present). Count only the
4801 null byte used to terminate the table. */
4804 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4806 /* File name entry. */
4807 size += size_of_string (file_table[ft_index]);
4809 /* Include directory index. */
4810 size += size_of_uleb128 (0);
4812 /* Modification time. */
4813 size += size_of_uleb128 (0);
4815 /* File length in bytes. */
4816 size += size_of_uleb128 (0);
4819 /* Count the file table terminator. */
4824 /* Return the size of the line information generated for this
4825 compilation unit. */
4827 static unsigned long
4828 size_of_line_info ()
4830 register unsigned long size;
4831 register unsigned long lt_index;
4832 register unsigned long current_line;
4833 register long line_offset;
4834 register long line_delta;
4835 register unsigned long current_file;
4836 register unsigned long function;
4837 unsigned long size_of_set_address;
4839 /* Size of a DW_LNE_set_address instruction. */
4840 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4842 /* Version number. */
4845 /* Prolog length specifier. */
4846 size += DWARF_OFFSET_SIZE;
4849 size += size_of_line_prolog ();
4853 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4855 register dw_line_info_ref line_info = &line_info_table[lt_index];
4857 if (line_info->dw_line_num == current_line
4858 && line_info->dw_file_num == current_file)
4861 /* Advance pc instruction. */
4862 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4866 size += size_of_set_address;
4868 if (line_info->dw_file_num != current_file)
4870 /* Set file number instruction. */
4872 current_file = line_info->dw_file_num;
4873 size += size_of_uleb128 (current_file);
4876 if (line_info->dw_line_num != current_line)
4878 line_offset = line_info->dw_line_num - current_line;
4879 line_delta = line_offset - DWARF_LINE_BASE;
4880 current_line = line_info->dw_line_num;
4881 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4882 /* 1-byte special line number instruction. */
4886 /* Advance line instruction. */
4888 size += size_of_sleb128 (line_offset);
4889 /* Generate line entry instruction. */
4895 /* Advance pc instruction. */
4899 size += size_of_set_address;
4901 /* End of line number info. marker. */
4902 size += 1 + size_of_uleb128 (1) + 1;
4907 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4909 register dw_separate_line_info_ref line_info
4910 = &separate_line_info_table[lt_index];
4912 if (line_info->dw_line_num == current_line
4913 && line_info->dw_file_num == current_file
4914 && line_info->function == function)
4917 if (function != line_info->function)
4919 function = line_info->function;
4920 /* Set address register instruction. */
4921 size += size_of_set_address;
4925 /* Advance pc instruction. */
4929 size += size_of_set_address;
4932 if (line_info->dw_file_num != current_file)
4934 /* Set file number instruction. */
4936 current_file = line_info->dw_file_num;
4937 size += size_of_uleb128 (current_file);
4940 if (line_info->dw_line_num != current_line)
4942 line_offset = line_info->dw_line_num - current_line;
4943 line_delta = line_offset - DWARF_LINE_BASE;
4944 current_line = line_info->dw_line_num;
4945 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4946 /* 1-byte special line number instruction. */
4950 /* Advance line instruction. */
4952 size += size_of_sleb128 (line_offset);
4954 /* Generate line entry instruction. */
4962 /* If we're done with a function, end its sequence. */
4963 if (lt_index == separate_line_info_table_in_use
4964 || separate_line_info_table[lt_index].function != function)
4969 /* Advance pc instruction. */
4973 size += size_of_set_address;
4975 /* End of line number info. marker. */
4976 size += 1 + size_of_uleb128 (1) + 1;
4983 /* Return the size of the .debug_pubnames table generated for the
4984 compilation unit. */
4986 static unsigned long
4989 register unsigned long size;
4990 register unsigned i;
4992 size = DWARF_PUBNAMES_HEADER_SIZE;
4993 for (i = 0; i < pubname_table_in_use; ++i)
4995 register pubname_ref p = &pubname_table[i];
4996 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4999 size += DWARF_OFFSET_SIZE;
5003 /* Return the size of the information in the .debug_aranges section. */
5005 static unsigned long
5008 register unsigned long size;
5010 size = DWARF_ARANGES_HEADER_SIZE;
5012 /* Count the address/length pair for this compilation unit. */
5013 size += 2 * PTR_SIZE;
5014 size += 2 * PTR_SIZE * arange_table_in_use;
5016 /* Count the two zero words used to terminated the address range table. */
5017 size += 2 * PTR_SIZE;
5021 /* Select the encoding of an attribute value. */
5023 static enum dwarf_form
5027 switch (v->val_class)
5029 case dw_val_class_addr:
5030 return DW_FORM_addr;
5031 case dw_val_class_loc:
5032 switch (constant_size (size_of_locs (v->v.val_loc)))
5035 return DW_FORM_block1;
5037 return DW_FORM_block2;
5041 case dw_val_class_const:
5042 return DW_FORM_data4;
5043 case dw_val_class_unsigned_const:
5044 switch (constant_size (v->v.val_unsigned))
5047 return DW_FORM_data1;
5049 return DW_FORM_data2;
5051 return DW_FORM_data4;
5053 return DW_FORM_data8;
5057 case dw_val_class_long_long:
5058 return DW_FORM_block1;
5059 case dw_val_class_float:
5060 return DW_FORM_block1;
5061 case dw_val_class_flag:
5062 return DW_FORM_flag;
5063 case dw_val_class_die_ref:
5065 case dw_val_class_fde_ref:
5066 return DW_FORM_data;
5067 case dw_val_class_lbl_id:
5068 return DW_FORM_addr;
5069 case dw_val_class_lbl_offset:
5070 return DW_FORM_data;
5071 case dw_val_class_str:
5072 return DW_FORM_string;
5078 /* Output the encoding of an attribute value. */
5081 output_value_format (v)
5084 enum dwarf_form form = value_format (v);
5086 output_uleb128 (form);
5088 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
5090 fputc ('\n', asm_out_file);
5093 /* Output the .debug_abbrev section which defines the DIE abbreviation
5097 output_abbrev_section ()
5099 unsigned long abbrev_id;
5102 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5104 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5106 output_uleb128 (abbrev_id);
5108 fprintf (asm_out_file, " (abbrev code)");
5110 fputc ('\n', asm_out_file);
5111 output_uleb128 (abbrev->die_tag);
5113 fprintf (asm_out_file, " (TAG: %s)",
5114 dwarf_tag_name (abbrev->die_tag));
5116 fputc ('\n', asm_out_file);
5117 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5118 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5121 fprintf (asm_out_file, "\t%s %s",
5123 (abbrev->die_child != NULL
5124 ? "DW_children_yes" : "DW_children_no"));
5126 fputc ('\n', asm_out_file);
5128 for (a_attr = abbrev->die_attr; a_attr != NULL;
5129 a_attr = a_attr->dw_attr_next)
5131 output_uleb128 (a_attr->dw_attr);
5133 fprintf (asm_out_file, " (%s)",
5134 dwarf_attr_name (a_attr->dw_attr));
5136 fputc ('\n', asm_out_file);
5137 output_value_format (&a_attr->dw_attr_val);
5140 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5143 /* Terminate the table. */
5144 fprintf (asm_out_file, "\t%s\t0\n", ASM_BYTE_OP);
5147 /* Output location description stack opcode's operands (if any). */
5150 output_loc_operands (loc)
5151 register dw_loc_descr_ref loc;
5153 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5154 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5156 switch (loc->dw_loc_opc)
5159 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5160 fputc ('\n', asm_out_file);
5164 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5165 fputc ('\n', asm_out_file);
5169 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5170 fputc ('\n', asm_out_file);
5174 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5175 fputc ('\n', asm_out_file);
5180 fputc ('\n', asm_out_file);
5183 output_uleb128 (val1->v.val_unsigned);
5184 fputc ('\n', asm_out_file);
5187 output_sleb128 (val1->v.val_int);
5188 fputc ('\n', asm_out_file);
5191 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5192 fputc ('\n', asm_out_file);
5194 case DW_OP_plus_uconst:
5195 output_uleb128 (val1->v.val_unsigned);
5196 fputc ('\n', asm_out_file);
5200 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5201 fputc ('\n', asm_out_file);
5235 output_sleb128 (val1->v.val_int);
5236 fputc ('\n', asm_out_file);
5239 output_uleb128 (val1->v.val_unsigned);
5240 fputc ('\n', asm_out_file);
5243 output_sleb128 (val1->v.val_int);
5244 fputc ('\n', asm_out_file);
5247 output_uleb128 (val1->v.val_unsigned);
5248 fputc ('\n', asm_out_file);
5249 output_sleb128 (val2->v.val_int);
5250 fputc ('\n', asm_out_file);
5253 output_uleb128 (val1->v.val_unsigned);
5254 fputc ('\n', asm_out_file);
5256 case DW_OP_deref_size:
5257 case DW_OP_xderef_size:
5258 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5259 fputc ('\n', asm_out_file);
5266 /* Compute the offset of a sibling. */
5268 static unsigned long
5269 sibling_offset (die)
5272 unsigned long offset;
5274 if (die->die_child_last == NULL)
5275 offset = die->die_offset + size_of_die (die);
5277 offset = sibling_offset (die->die_child_last) + 1;
5282 /* Output the DIE and its attributes. Called recursively to generate
5283 the definitions of each child DIE. */
5287 register dw_die_ref die;
5289 register dw_attr_ref a;
5290 register dw_die_ref c;
5291 register unsigned long ref_offset;
5292 register unsigned long size;
5293 register dw_loc_descr_ref loc;
5295 output_uleb128 (die->die_abbrev);
5297 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5298 die->die_offset, dwarf_tag_name (die->die_tag));
5300 fputc ('\n', asm_out_file);
5302 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5304 switch (a->dw_attr_val.val_class)
5306 case dw_val_class_addr:
5307 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5308 a->dw_attr_val.v.val_addr);
5311 case dw_val_class_loc:
5312 size = size_of_locs (a->dw_attr_val.v.val_loc);
5314 /* Output the block length for this list of location operations. */
5315 switch (constant_size (size))
5318 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5321 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5328 fprintf (asm_out_file, "\t%s %s",
5329 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5331 fputc ('\n', asm_out_file);
5332 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5333 loc = loc->dw_loc_next)
5335 /* Output the opcode. */
5336 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5338 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5339 dwarf_stack_op_name (loc->dw_loc_opc));
5341 fputc ('\n', asm_out_file);
5343 /* Output the operand(s) (if any). */
5344 output_loc_operands (loc);
5348 case dw_val_class_const:
5349 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5352 case dw_val_class_unsigned_const:
5353 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5356 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5357 a->dw_attr_val.v.val_unsigned);
5360 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5361 a->dw_attr_val.v.val_unsigned);
5364 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5365 a->dw_attr_val.v.val_unsigned);
5368 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5369 a->dw_attr_val.v.val_long_long.hi,
5370 a->dw_attr_val.v.val_long_long.low);
5377 case dw_val_class_long_long:
5378 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5380 fprintf (asm_out_file, "\t%s %s",
5381 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5383 fputc ('\n', asm_out_file);
5384 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5385 a->dw_attr_val.v.val_long_long.hi,
5386 a->dw_attr_val.v.val_long_long.low);
5389 fprintf (asm_out_file,
5390 "\t%s long long constant", ASM_COMMENT_START);
5392 fputc ('\n', asm_out_file);
5395 case dw_val_class_float:
5397 register unsigned int i;
5398 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5399 a->dw_attr_val.v.val_float.length * 4);
5401 fprintf (asm_out_file, "\t%s %s",
5402 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5404 fputc ('\n', asm_out_file);
5405 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5407 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5408 a->dw_attr_val.v.val_float.array[i]);
5410 fprintf (asm_out_file, "\t%s fp constant word %u",
5411 ASM_COMMENT_START, i);
5413 fputc ('\n', asm_out_file);
5418 case dw_val_class_flag:
5419 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5422 case dw_val_class_die_ref:
5423 if (a->dw_attr_val.v.val_die_ref != NULL)
5424 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5425 else if (a->dw_attr == DW_AT_sibling)
5426 ref_offset = sibling_offset(die);
5430 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5433 case dw_val_class_fde_ref:
5436 ASM_GENERATE_INTERNAL_LABEL
5437 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5438 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5439 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5443 case dw_val_class_lbl_id:
5444 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5447 case dw_val_class_lbl_offset:
5448 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5451 case dw_val_class_str:
5453 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5455 ASM_OUTPUT_ASCII (asm_out_file,
5456 a->dw_attr_val.v.val_str,
5457 (int) strlen (a->dw_attr_val.v.val_str) + 1);
5464 if (a->dw_attr_val.val_class != dw_val_class_loc
5465 && a->dw_attr_val.val_class != dw_val_class_long_long
5466 && a->dw_attr_val.val_class != dw_val_class_float)
5469 fprintf (asm_out_file, "\t%s %s",
5470 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5472 fputc ('\n', asm_out_file);
5476 for (c = die->die_child; c != NULL; c = c->die_sib)
5479 if (die->die_child != NULL)
5481 /* Add null byte to terminate sibling list. */
5482 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5484 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5485 ASM_COMMENT_START, die->die_offset);
5487 fputc ('\n', asm_out_file);
5491 /* Output the compilation unit that appears at the beginning of the
5492 .debug_info section, and precedes the DIE descriptions. */
5495 output_compilation_unit_header ()
5497 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5499 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5502 fputc ('\n', asm_out_file);
5503 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5505 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5507 fputc ('\n', asm_out_file);
5508 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, abbrev_section_label);
5510 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5513 fputc ('\n', asm_out_file);
5514 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5516 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5518 fputc ('\n', asm_out_file);
5521 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5522 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5523 argument list, and maybe the scope. */
5526 dwarf2_name (decl, scope)
5530 return (*decl_printable_name) (decl, scope ? 1 : 0);
5533 /* Add a new entry to .debug_pubnames if appropriate. */
5536 add_pubname (decl, die)
5542 if (! TREE_PUBLIC (decl))
5545 if (pubname_table_in_use == pubname_table_allocated)
5547 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5548 pubname_table = (pubname_ref) xrealloc
5549 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5552 p = &pubname_table[pubname_table_in_use++];
5555 p->name = xstrdup (dwarf2_name (decl, 1));
5558 /* Output the public names table used to speed up access to externally
5559 visible names. For now, only generate entries for externally
5560 visible procedures. */
5565 register unsigned i;
5566 register unsigned long pubnames_length = size_of_pubnames ();
5568 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5571 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5574 fputc ('\n', asm_out_file);
5575 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5578 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5580 fputc ('\n', asm_out_file);
5581 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5583 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5586 fputc ('\n', asm_out_file);
5587 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5589 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5591 fputc ('\n', asm_out_file);
5592 for (i = 0; i < pubname_table_in_use; ++i)
5594 register pubname_ref pub = &pubname_table[i];
5596 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5598 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5600 fputc ('\n', asm_out_file);
5604 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5605 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5609 ASM_OUTPUT_ASCII (asm_out_file, pub->name,
5610 (int) strlen (pub->name) + 1);
5613 fputc ('\n', asm_out_file);
5616 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5617 fputc ('\n', asm_out_file);
5620 /* Add a new entry to .debug_aranges if appropriate. */
5623 add_arange (decl, die)
5627 if (! DECL_SECTION_NAME (decl))
5630 if (arange_table_in_use == arange_table_allocated)
5632 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5634 = (arange_ref) xrealloc (arange_table,
5635 arange_table_allocated * sizeof (dw_die_ref));
5638 arange_table[arange_table_in_use++] = die;
5641 /* Output the information that goes into the .debug_aranges table.
5642 Namely, define the beginning and ending address range of the
5643 text section generated for this compilation unit. */
5648 register unsigned i;
5649 register unsigned long aranges_length = size_of_aranges ();
5651 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5653 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5656 fputc ('\n', asm_out_file);
5657 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5659 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5661 fputc ('\n', asm_out_file);
5662 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5664 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5667 fputc ('\n', asm_out_file);
5668 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5670 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5672 fputc ('\n', asm_out_file);
5673 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5675 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5678 fputc ('\n', asm_out_file);
5679 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
5681 fprintf (asm_out_file, ",0,0");
5684 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5685 ASM_COMMENT_START, 2 * PTR_SIZE);
5687 fputc ('\n', asm_out_file);
5688 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_section_label);
5690 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5692 fputc ('\n', asm_out_file);
5693 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5694 text_section_label);
5696 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5698 fputc ('\n', asm_out_file);
5699 for (i = 0; i < arange_table_in_use; ++i)
5701 dw_die_ref a = arange_table[i];
5703 if (a->die_tag == DW_TAG_subprogram)
5704 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
5707 char *name = get_AT_string (a, DW_AT_MIPS_linkage_name);
5709 name = get_AT_string (a, DW_AT_name);
5711 ASM_OUTPUT_DWARF_ADDR (asm_out_file, name);
5715 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5717 fputc ('\n', asm_out_file);
5718 if (a->die_tag == DW_TAG_subprogram)
5719 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
5722 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5723 get_AT_unsigned (a, DW_AT_byte_size));
5726 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5728 fputc ('\n', asm_out_file);
5731 /* Output the terminator words. */
5732 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5733 fputc ('\n', asm_out_file);
5734 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5735 fputc ('\n', asm_out_file);
5738 /* Output the source line number correspondence information. This
5739 information goes into the .debug_line section.
5741 If the format of this data changes, then the function size_of_line_info
5742 must also be adjusted the same way. */
5747 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5748 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5749 register unsigned opc;
5750 register unsigned n_op_args;
5751 register unsigned long ft_index;
5752 register unsigned long lt_index;
5753 register unsigned long current_line;
5754 register long line_offset;
5755 register long line_delta;
5756 register unsigned long current_file;
5757 register unsigned long function;
5759 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5761 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5764 fputc ('\n', asm_out_file);
5765 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5767 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5769 fputc ('\n', asm_out_file);
5770 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5772 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5774 fputc ('\n', asm_out_file);
5775 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5777 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5780 fputc ('\n', asm_out_file);
5781 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5783 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5786 fputc ('\n', asm_out_file);
5787 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5789 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5792 fputc ('\n', asm_out_file);
5793 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5795 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5798 fputc ('\n', asm_out_file);
5799 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5801 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5803 fputc ('\n', asm_out_file);
5804 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5808 case DW_LNS_advance_pc:
5809 case DW_LNS_advance_line:
5810 case DW_LNS_set_file:
5811 case DW_LNS_set_column:
5812 case DW_LNS_fixed_advance_pc:
5819 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5821 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5822 ASM_COMMENT_START, opc, n_op_args);
5823 fputc ('\n', asm_out_file);
5827 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5829 /* Include directory table is empty, at present */
5830 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5831 fputc ('\n', asm_out_file);
5833 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5835 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5839 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5840 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5841 ASM_COMMENT_START, ft_index);
5845 ASM_OUTPUT_ASCII (asm_out_file,
5846 file_table[ft_index],
5847 (int) strlen (file_table[ft_index]) + 1);
5850 fputc ('\n', asm_out_file);
5852 /* Include directory index */
5854 fputc ('\n', asm_out_file);
5856 /* Modification time */
5858 fputc ('\n', asm_out_file);
5860 /* File length in bytes */
5862 fputc ('\n', asm_out_file);
5865 /* Terminate the file name table */
5866 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5867 fputc ('\n', asm_out_file);
5869 /* We used to set the address register to the first location in the text
5870 section here, but that didn't accomplish anything since we already
5871 have a line note for the opening brace of the first function. */
5873 /* Generate the line number to PC correspondence table, encoded as
5874 a series of state machine operations. */
5877 strcpy (prev_line_label, text_section_label);
5878 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5880 register dw_line_info_ref line_info = &line_info_table[lt_index];
5882 /* Don't emit anything for redundant notes. Just updating the
5883 address doesn't accomplish anything, because we already assume
5884 that anything after the last address is this line. */
5885 if (line_info->dw_line_num == current_line
5886 && line_info->dw_file_num == current_file)
5889 /* Emit debug info for the address of the current line, choosing
5890 the encoding that uses the least amount of space. */
5891 /* ??? Unfortunately, we have little choice here currently, and must
5892 always use the most general form. Gcc does not know the address
5893 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5894 dwarf2 aware assemblers at this time, so we can't use any special
5895 pseudo ops that would allow the assembler to optimally encode this for
5896 us. Many ports do have length attributes which will give an upper
5897 bound on the address range. We could perhaps use length attributes
5898 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5899 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5902 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5903 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5905 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5908 fputc ('\n', asm_out_file);
5909 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5910 fputc ('\n', asm_out_file);
5914 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5915 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5917 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5919 fputc ('\n', asm_out_file);
5920 output_uleb128 (1 + PTR_SIZE);
5921 fputc ('\n', asm_out_file);
5922 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5923 fputc ('\n', asm_out_file);
5924 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5925 fputc ('\n', asm_out_file);
5927 strcpy (prev_line_label, line_label);
5929 /* Emit debug info for the source file of the current line, if
5930 different from the previous line. */
5931 if (line_info->dw_file_num != current_file)
5933 current_file = line_info->dw_file_num;
5934 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5936 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5938 fputc ('\n', asm_out_file);
5939 output_uleb128 (current_file);
5941 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5943 fputc ('\n', asm_out_file);
5946 /* Emit debug info for the current line number, choosing the encoding
5947 that uses the least amount of space. */
5948 if (line_info->dw_line_num != current_line)
5950 line_offset = line_info->dw_line_num - current_line;
5951 line_delta = line_offset - DWARF_LINE_BASE;
5952 current_line = line_info->dw_line_num;
5953 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5955 /* This can handle deltas from -10 to 234, using the current
5956 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5958 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5959 DWARF_LINE_OPCODE_BASE + line_delta);
5961 fprintf (asm_out_file,
5962 "\t%s line %ld", ASM_COMMENT_START, current_line);
5964 fputc ('\n', asm_out_file);
5968 /* This can handle any delta. This takes at least 4 bytes,
5969 depending on the value being encoded. */
5970 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5972 fprintf (asm_out_file, "\t%s advance to line %ld",
5973 ASM_COMMENT_START, current_line);
5975 fputc ('\n', asm_out_file);
5976 output_sleb128 (line_offset);
5977 fputc ('\n', asm_out_file);
5978 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5980 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
5981 fputc ('\n', asm_out_file);
5986 /* We still need to start a new row, so output a copy insn. */
5987 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5989 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
5990 fputc ('\n', asm_out_file);
5994 /* Emit debug info for the address of the end of the function. */
5997 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5999 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6002 fputc ('\n', asm_out_file);
6003 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
6004 fputc ('\n', asm_out_file);
6008 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6010 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
6011 fputc ('\n', asm_out_file);
6012 output_uleb128 (1 + PTR_SIZE);
6013 fputc ('\n', asm_out_file);
6014 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6015 fputc ('\n', asm_out_file);
6016 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
6017 fputc ('\n', asm_out_file);
6020 /* Output the marker for the end of the line number info. */
6021 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6023 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
6025 fputc ('\n', asm_out_file);
6027 fputc ('\n', asm_out_file);
6028 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6029 fputc ('\n', asm_out_file);
6034 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
6036 register dw_separate_line_info_ref line_info
6037 = &separate_line_info_table[lt_index];
6039 /* Don't emit anything for redundant notes. */
6040 if (line_info->dw_line_num == current_line
6041 && line_info->dw_file_num == current_file
6042 && line_info->function == function)
6045 /* Emit debug info for the address of the current line. If this is
6046 a new function, or the first line of a function, then we need
6047 to handle it differently. */
6048 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
6050 if (function != line_info->function)
6052 function = line_info->function;
6054 /* Set the address register to the first line in the function */
6055 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6057 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6060 fputc ('\n', asm_out_file);
6061 output_uleb128 (1 + PTR_SIZE);
6062 fputc ('\n', asm_out_file);
6063 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6064 fputc ('\n', asm_out_file);
6065 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6066 fputc ('\n', asm_out_file);
6070 /* ??? See the DW_LNS_advance_pc comment above. */
6073 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6075 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6078 fputc ('\n', asm_out_file);
6079 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6081 fputc ('\n', asm_out_file);
6085 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6087 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6089 fputc ('\n', asm_out_file);
6090 output_uleb128 (1 + PTR_SIZE);
6091 fputc ('\n', asm_out_file);
6092 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6093 fputc ('\n', asm_out_file);
6094 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6095 fputc ('\n', asm_out_file);
6098 strcpy (prev_line_label, line_label);
6100 /* Emit debug info for the source file of the current line, if
6101 different from the previous line. */
6102 if (line_info->dw_file_num != current_file)
6104 current_file = line_info->dw_file_num;
6105 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
6107 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
6109 fputc ('\n', asm_out_file);
6110 output_uleb128 (current_file);
6112 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
6114 fputc ('\n', asm_out_file);
6117 /* Emit debug info for the current line number, choosing the encoding
6118 that uses the least amount of space. */
6119 if (line_info->dw_line_num != current_line)
6121 line_offset = line_info->dw_line_num - current_line;
6122 line_delta = line_offset - DWARF_LINE_BASE;
6123 current_line = line_info->dw_line_num;
6124 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6126 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6127 DWARF_LINE_OPCODE_BASE + line_delta);
6129 fprintf (asm_out_file,
6130 "\t%s line %ld", ASM_COMMENT_START, current_line);
6132 fputc ('\n', asm_out_file);
6136 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6138 fprintf (asm_out_file, "\t%s advance to line %ld",
6139 ASM_COMMENT_START, current_line);
6141 fputc ('\n', asm_out_file);
6142 output_sleb128 (line_offset);
6143 fputc ('\n', asm_out_file);
6144 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6146 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6147 fputc ('\n', asm_out_file);
6152 /* We still need to start a new row, so output a copy insn. */
6153 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6155 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6156 fputc ('\n', asm_out_file);
6162 /* If we're done with a function, end its sequence. */
6163 if (lt_index == separate_line_info_table_in_use
6164 || separate_line_info_table[lt_index].function != function)
6169 /* Emit debug info for the address of the end of the function. */
6170 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6173 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6175 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6178 fputc ('\n', asm_out_file);
6179 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6181 fputc ('\n', asm_out_file);
6185 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6187 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6189 fputc ('\n', asm_out_file);
6190 output_uleb128 (1 + PTR_SIZE);
6191 fputc ('\n', asm_out_file);
6192 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6193 fputc ('\n', asm_out_file);
6194 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6195 fputc ('\n', asm_out_file);
6198 /* Output the marker for the end of this sequence. */
6199 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6201 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6204 fputc ('\n', asm_out_file);
6206 fputc ('\n', asm_out_file);
6207 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6208 fputc ('\n', asm_out_file);
6213 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6214 in question represents the outermost pair of curly braces (i.e. the "body
6215 block") of a function or method.
6217 For any BLOCK node representing a "body block" of a function or method, the
6218 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6219 represents the outermost (function) scope for the function or method (i.e.
6220 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6221 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6224 is_body_block (stmt)
6227 if (TREE_CODE (stmt) == BLOCK)
6229 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6231 if (TREE_CODE (parent) == BLOCK)
6233 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6235 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6243 /* Given a pointer to a tree node for some base type, return a pointer to
6244 a DIE that describes the given type.
6246 This routine must only be called for GCC type nodes that correspond to
6247 Dwarf base (fundamental) types. */
6250 base_type_die (type)
6253 register dw_die_ref base_type_result;
6254 register char *type_name;
6255 register enum dwarf_type encoding;
6256 register tree name = TYPE_NAME (type);
6258 if (TREE_CODE (type) == ERROR_MARK
6259 || TREE_CODE (type) == VOID_TYPE)
6262 if (TREE_CODE (name) == TYPE_DECL)
6263 name = DECL_NAME (name);
6264 type_name = IDENTIFIER_POINTER (name);
6266 switch (TREE_CODE (type))
6269 /* Carefully distinguish the C character types, without messing
6270 up if the language is not C. Note that we check only for the names
6271 that contain spaces; other names might occur by coincidence in other
6273 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6274 && (type == char_type_node
6275 || ! strcmp (type_name, "signed char")
6276 || ! strcmp (type_name, "unsigned char"))))
6278 if (TREE_UNSIGNED (type))
6279 encoding = DW_ATE_unsigned;
6281 encoding = DW_ATE_signed;
6284 /* else fall through */
6287 /* GNU Pascal/Ada CHAR type. Not used in C. */
6288 if (TREE_UNSIGNED (type))
6289 encoding = DW_ATE_unsigned_char;
6291 encoding = DW_ATE_signed_char;
6295 encoding = DW_ATE_float;
6299 encoding = DW_ATE_complex_float;
6303 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6304 encoding = DW_ATE_boolean;
6308 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6311 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6312 add_AT_string (base_type_result, DW_AT_name, type_name);
6313 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6314 int_size_in_bytes (type));
6315 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6317 return base_type_result;
6320 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6321 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6322 a given type is generally the same as the given type, except that if the
6323 given type is a pointer or reference type, then the root type of the given
6324 type is the root type of the "basis" type for the pointer or reference
6325 type. (This definition of the "root" type is recursive.) Also, the root
6326 type of a `const' qualified type or a `volatile' qualified type is the
6327 root type of the given type without the qualifiers. */
6333 if (TREE_CODE (type) == ERROR_MARK)
6334 return error_mark_node;
6336 switch (TREE_CODE (type))
6339 return error_mark_node;
6342 case REFERENCE_TYPE:
6343 return type_main_variant (root_type (TREE_TYPE (type)));
6346 return type_main_variant (type);
6350 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6351 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6357 switch (TREE_CODE (type))
6372 case QUAL_UNION_TYPE:
6377 case REFERENCE_TYPE:
6390 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6391 entry that chains various modifiers in front of the given type. */
6394 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6396 register int is_const_type;
6397 register int is_volatile_type;
6398 register dw_die_ref context_die;
6400 register enum tree_code code = TREE_CODE (type);
6401 register dw_die_ref mod_type_die = NULL;
6402 register dw_die_ref sub_die = NULL;
6403 register tree item_type = NULL;
6405 if (code != ERROR_MARK)
6407 type = build_type_variant (type, is_const_type, is_volatile_type);
6409 mod_type_die = lookup_type_die (type);
6411 return mod_type_die;
6413 /* Handle C typedef types. */
6414 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6415 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6417 tree dtype = TREE_TYPE (TYPE_NAME (type));
6420 /* For a named type, use the typedef. */
6421 gen_type_die (type, context_die);
6422 mod_type_die = lookup_type_die (type);
6425 else if (is_const_type < TYPE_READONLY (dtype)
6426 || is_volatile_type < TYPE_VOLATILE (dtype))
6427 /* cv-unqualified version of named type. Just use the unnamed
6428 type to which it refers. */
6430 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6431 is_const_type, is_volatile_type,
6433 /* Else cv-qualified version of named type; fall through. */
6438 else if (is_const_type)
6440 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6441 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6443 else if (is_volatile_type)
6445 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6446 sub_die = modified_type_die (type, 0, 0, context_die);
6448 else if (code == POINTER_TYPE)
6450 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6451 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6453 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6455 item_type = TREE_TYPE (type);
6457 else if (code == REFERENCE_TYPE)
6459 mod_type_die = new_die (DW_TAG_reference_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 (is_base_type (type))
6467 mod_type_die = base_type_die (type);
6470 gen_type_die (type, context_die);
6472 /* We have to get the type_main_variant here (and pass that to the
6473 `lookup_type_die' routine) because the ..._TYPE node we have
6474 might simply be a *copy* of some original type node (where the
6475 copy was created to help us keep track of typedef names) and
6476 that copy might have a different TYPE_UID from the original
6478 mod_type_die = lookup_type_die (type_main_variant (type));
6479 if (mod_type_die == NULL)
6484 equate_type_number_to_die (type, mod_type_die);
6486 /* We must do this after the equate_type_number_to_die call, in case
6487 this is a recursive type. This ensures that the modified_type_die
6488 recursion will terminate even if the type is recursive. Recursive
6489 types are possible in Ada. */
6490 sub_die = modified_type_die (item_type,
6491 TYPE_READONLY (item_type),
6492 TYPE_VOLATILE (item_type),
6495 if (sub_die != NULL)
6496 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6498 return mod_type_die;
6501 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6502 an enumerated type. */
6508 return TREE_CODE (type) == ENUMERAL_TYPE;
6511 /* Return a location descriptor that designates a machine register. */
6513 static dw_loc_descr_ref
6514 reg_loc_descriptor (rtl)
6517 register dw_loc_descr_ref loc_result = NULL;
6518 register unsigned reg = reg_number (rtl);
6521 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6523 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6528 /* Return a location descriptor that designates a base+offset location. */
6530 static dw_loc_descr_ref
6531 based_loc_descr (reg, offset)
6535 register dw_loc_descr_ref loc_result;
6536 /* For the "frame base", we use the frame pointer or stack pointer
6537 registers, since the RTL for local variables is relative to one of
6539 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6540 ? HARD_FRAME_POINTER_REGNUM
6541 : STACK_POINTER_REGNUM);
6544 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6546 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6548 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6553 /* Return true if this RTL expression describes a base+offset calculation. */
6559 return (GET_CODE (rtl) == PLUS
6560 && ((GET_CODE (XEXP (rtl, 0)) == REG
6561 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6564 /* The following routine converts the RTL for a variable or parameter
6565 (resident in memory) into an equivalent Dwarf representation of a
6566 mechanism for getting the address of that same variable onto the top of a
6567 hypothetical "address evaluation" stack.
6569 When creating memory location descriptors, we are effectively transforming
6570 the RTL for a memory-resident object into its Dwarf postfix expression
6571 equivalent. This routine recursively descends an RTL tree, turning
6572 it into Dwarf postfix code as it goes. */
6574 static dw_loc_descr_ref
6575 mem_loc_descriptor (rtl)
6578 dw_loc_descr_ref mem_loc_result = NULL;
6579 /* Note that for a dynamically sized array, the location we will generate a
6580 description of here will be the lowest numbered location which is
6581 actually within the array. That's *not* necessarily the same as the
6582 zeroth element of the array. */
6584 switch (GET_CODE (rtl))
6587 /* The case of a subreg may arise when we have a local (register)
6588 variable or a formal (register) parameter which doesn't quite fill
6589 up an entire register. For now, just assume that it is
6590 legitimate to make the Dwarf info refer to the whole register which
6591 contains the given subreg. */
6592 rtl = XEXP (rtl, 0);
6594 /* ... fall through ... */
6597 /* Whenever a register number forms a part of the description of the
6598 method for calculating the (dynamic) address of a memory resident
6599 object, DWARF rules require the register number be referred to as
6600 a "base register". This distinction is not based in any way upon
6601 what category of register the hardware believes the given register
6602 belongs to. This is strictly DWARF terminology we're dealing with
6603 here. Note that in cases where the location of a memory-resident
6604 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6605 OP_CONST (0)) the actual DWARF location descriptor that we generate
6606 may just be OP_BASEREG (basereg). This may look deceptively like
6607 the object in question was allocated to a register (rather than in
6608 memory) so DWARF consumers need to be aware of the subtle
6609 distinction between OP_REG and OP_BASEREG. */
6610 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6614 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6615 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6619 /* Some ports can transform a symbol ref into a label ref, because
6620 the symbol ref is too far away and has to be dumped into a constant
6624 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6625 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6626 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6630 if (is_based_loc (rtl))
6631 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6632 INTVAL (XEXP (rtl, 1)));
6635 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6636 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6637 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6642 /* If a pseudo-reg is optimized away, it is possible for it to
6643 be replaced with a MEM containing a multiply. */
6644 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6645 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6646 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6650 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6657 return mem_loc_result;
6660 /* Return a descriptor that describes the concatenation of two locations.
6661 This is typically a complex variable. */
6663 static dw_loc_descr_ref
6664 concat_loc_descriptor (x0, x1)
6665 register rtx x0, x1;
6667 dw_loc_descr_ref cc_loc_result = NULL;
6669 if (!is_pseudo_reg (x0)
6670 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6671 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6672 add_loc_descr (&cc_loc_result,
6673 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6675 if (!is_pseudo_reg (x1)
6676 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6677 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6678 add_loc_descr (&cc_loc_result,
6679 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6681 return cc_loc_result;
6684 /* Output a proper Dwarf location descriptor for a variable or parameter
6685 which is either allocated in a register or in a memory location. For a
6686 register, we just generate an OP_REG and the register number. For a
6687 memory location we provide a Dwarf postfix expression describing how to
6688 generate the (dynamic) address of the object onto the address stack. */
6690 static dw_loc_descr_ref
6691 loc_descriptor (rtl)
6694 dw_loc_descr_ref loc_result = NULL;
6695 switch (GET_CODE (rtl))
6698 /* The case of a subreg may arise when we have a local (register)
6699 variable or a formal (register) parameter which doesn't quite fill
6700 up an entire register. For now, just assume that it is
6701 legitimate to make the Dwarf info refer to the whole register which
6702 contains the given subreg. */
6703 rtl = XEXP (rtl, 0);
6705 /* ... fall through ... */
6708 loc_result = reg_loc_descriptor (rtl);
6712 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6716 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6726 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6727 which is not less than the value itself. */
6729 static inline unsigned
6730 ceiling (value, boundary)
6731 register unsigned value;
6732 register unsigned boundary;
6734 return (((value + boundary - 1) / boundary) * boundary);
6737 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6738 pointer to the declared type for the relevant field variable, or return
6739 `integer_type_node' if the given node turns out to be an
6748 if (TREE_CODE (decl) == ERROR_MARK)
6749 return integer_type_node;
6751 type = DECL_BIT_FIELD_TYPE (decl);
6752 if (type == NULL_TREE)
6753 type = TREE_TYPE (decl);
6758 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6759 node, return the alignment in bits for the type, or else return
6760 BITS_PER_WORD if the node actually turns out to be an
6763 static inline unsigned
6764 simple_type_align_in_bits (type)
6767 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6770 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6771 node, return the size in bits for the type if it is a constant, or else
6772 return the alignment for the type if the type's size is not constant, or
6773 else return BITS_PER_WORD if the type actually turns out to be an
6776 static inline unsigned
6777 simple_type_size_in_bits (type)
6780 if (TREE_CODE (type) == ERROR_MARK)
6781 return BITS_PER_WORD;
6784 register tree type_size_tree = TYPE_SIZE (type);
6786 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6787 return TYPE_ALIGN (type);
6789 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6793 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6794 return the byte offset of the lowest addressed byte of the "containing
6795 object" for the given FIELD_DECL, or return 0 if we are unable to
6796 determine what that offset is, either because the argument turns out to
6797 be a pointer to an ERROR_MARK node, or because the offset is actually
6798 variable. (We can't handle the latter case just yet). */
6801 field_byte_offset (decl)
6804 register unsigned type_align_in_bytes;
6805 register unsigned type_align_in_bits;
6806 register unsigned type_size_in_bits;
6807 register unsigned object_offset_in_align_units;
6808 register unsigned object_offset_in_bits;
6809 register unsigned object_offset_in_bytes;
6811 register tree bitpos_tree;
6812 register tree field_size_tree;
6813 register unsigned bitpos_int;
6814 register unsigned deepest_bitpos;
6815 register unsigned field_size_in_bits;
6817 if (TREE_CODE (decl) == ERROR_MARK)
6820 if (TREE_CODE (decl) != FIELD_DECL)
6823 type = field_type (decl);
6825 bitpos_tree = DECL_FIELD_BITPOS (decl);
6826 field_size_tree = DECL_SIZE (decl);
6828 /* We cannot yet cope with fields whose positions or sizes are variable, so
6829 for now, when we see such things, we simply return 0. Someday, we may
6830 be able to handle such cases, but it will be damn difficult. */
6831 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6833 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6835 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6838 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6839 type_size_in_bits = simple_type_size_in_bits (type);
6840 type_align_in_bits = simple_type_align_in_bits (type);
6841 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6843 /* Note that the GCC front-end doesn't make any attempt to keep track of
6844 the starting bit offset (relative to the start of the containing
6845 structure type) of the hypothetical "containing object" for a bit-
6846 field. Thus, when computing the byte offset value for the start of the
6847 "containing object" of a bit-field, we must deduce this information on
6848 our own. This can be rather tricky to do in some cases. For example,
6849 handling the following structure type definition when compiling for an
6850 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6853 struct S { int field1; long long field2:31; };
6855 Fortunately, there is a simple rule-of-thumb which can be
6856 used in such cases. When compiling for an i386/i486, GCC will allocate
6857 8 bytes for the structure shown above. It decides to do this based upon
6858 one simple rule for bit-field allocation. Quite simply, GCC allocates
6859 each "containing object" for each bit-field at the first (i.e. lowest
6860 addressed) legitimate alignment boundary (based upon the required
6861 minimum alignment for the declared type of the field) which it can
6862 possibly use, subject to the condition that there is still enough
6863 available space remaining in the containing object (when allocated at
6864 the selected point) to fully accommodate all of the bits of the
6865 bit-field itself. This simple rule makes it obvious why GCC allocates
6866 8 bytes for each object of the structure type shown above. When looking
6867 for a place to allocate the "containing object" for `field2', the
6868 compiler simply tries to allocate a 64-bit "containing object" at each
6869 successive 32-bit boundary (starting at zero) until it finds a place to
6870 allocate that 64- bit field such that at least 31 contiguous (and
6871 previously unallocated) bits remain within that selected 64 bit field.
6872 (As it turns out, for the example above, the compiler finds that it is
6873 OK to allocate the "containing object" 64-bit field at bit-offset zero
6874 within the structure type.) Here we attempt to work backwards from the
6875 limited set of facts we're given, and we try to deduce from those facts,
6876 where GCC must have believed that the containing object started (within
6877 the structure type). The value we deduce is then used (by the callers of
6878 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6879 for fields (both bit-fields and, in the case of DW_AT_location, regular
6882 /* Figure out the bit-distance from the start of the structure to the
6883 "deepest" bit of the bit-field. */
6884 deepest_bitpos = bitpos_int + field_size_in_bits;
6886 /* This is the tricky part. Use some fancy footwork to deduce where the
6887 lowest addressed bit of the containing object must be. */
6888 object_offset_in_bits
6889 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6891 /* Compute the offset of the containing object in "alignment units". */
6892 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6894 /* Compute the offset of the containing object in bytes. */
6895 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6897 return object_offset_in_bytes;
6900 /* The following routines define various Dwarf attributes and any data
6901 associated with them. */
6903 /* Add a location description attribute value to a DIE.
6905 This emits location attributes suitable for whole variables and
6906 whole parameters. Note that the location attributes for struct fields are
6907 generated by the routine `data_member_location_attribute' below. */
6910 add_AT_location_description (die, attr_kind, rtl)
6912 enum dwarf_attribute attr_kind;
6915 /* Handle a special case. If we are about to output a location descriptor
6916 for a variable or parameter which has been optimized out of existence,
6917 don't do that. A variable which has been optimized out
6918 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6919 Currently, in some rare cases, variables can have DECL_RTL values which
6920 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6921 elsewhere in the compiler. We treat such cases as if the variable(s) in
6922 question had been optimized out of existence. */
6924 if (is_pseudo_reg (rtl)
6925 || (GET_CODE (rtl) == MEM
6926 && is_pseudo_reg (XEXP (rtl, 0)))
6927 || (GET_CODE (rtl) == CONCAT
6928 && is_pseudo_reg (XEXP (rtl, 0))
6929 && is_pseudo_reg (XEXP (rtl, 1))))
6932 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6935 /* Attach the specialized form of location attribute used for data
6936 members of struct and union types. In the special case of a
6937 FIELD_DECL node which represents a bit-field, the "offset" part
6938 of this special location descriptor must indicate the distance
6939 in bytes from the lowest-addressed byte of the containing struct
6940 or union type to the lowest-addressed byte of the "containing
6941 object" for the bit-field. (See the `field_byte_offset' function
6942 above).. For any given bit-field, the "containing object" is a
6943 hypothetical object (of some integral or enum type) within which
6944 the given bit-field lives. The type of this hypothetical
6945 "containing object" is always the same as the declared type of
6946 the individual bit-field itself (for GCC anyway... the DWARF
6947 spec doesn't actually mandate this). Note that it is the size
6948 (in bytes) of the hypothetical "containing object" which will
6949 be given in the DW_AT_byte_size attribute for this bit-field.
6950 (See the `byte_size_attribute' function below.) It is also used
6951 when calculating the value of the DW_AT_bit_offset attribute.
6952 (See the `bit_offset_attribute' function below). */
6955 add_data_member_location_attribute (die, decl)
6956 register dw_die_ref die;
6959 register unsigned long offset;
6960 register dw_loc_descr_ref loc_descr;
6961 register enum dwarf_location_atom op;
6963 if (TREE_CODE (decl) == TREE_VEC)
6964 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6966 offset = field_byte_offset (decl);
6968 /* The DWARF2 standard says that we should assume that the structure address
6969 is already on the stack, so we can specify a structure field address
6970 by using DW_OP_plus_uconst. */
6972 #ifdef MIPS_DEBUGGING_INFO
6973 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6974 correctly. It works only if we leave the offset on the stack. */
6977 op = DW_OP_plus_uconst;
6980 loc_descr = new_loc_descr (op, offset, 0);
6981 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
6984 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6985 does not have a "location" either in memory or in a register. These
6986 things can arise in GNU C when a constant is passed as an actual parameter
6987 to an inlined function. They can also arise in C++ where declared
6988 constants do not necessarily get memory "homes". */
6991 add_const_value_attribute (die, rtl)
6992 register dw_die_ref die;
6995 switch (GET_CODE (rtl))
6998 /* Note that a CONST_INT rtx could represent either an integer or a
6999 floating-point constant. A CONST_INT is used whenever the constant
7000 will fit into a single word. In all such cases, the original mode
7001 of the constant value is wiped out, and the CONST_INT rtx is
7002 assigned VOIDmode. */
7003 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
7007 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
7008 floating-point constant. A CONST_DOUBLE is used whenever the
7009 constant requires more than one word in order to be adequately
7010 represented. We output CONST_DOUBLEs as blocks. */
7012 register enum machine_mode mode = GET_MODE (rtl);
7014 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
7016 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
7020 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
7024 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
7028 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
7033 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
7040 add_AT_float (die, DW_AT_const_value, length, array);
7043 add_AT_long_long (die, DW_AT_const_value,
7044 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
7049 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
7055 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
7059 /* In cases where an inlined instance of an inline function is passed
7060 the address of an `auto' variable (which is local to the caller) we
7061 can get a situation where the DECL_RTL of the artificial local
7062 variable (for the inlining) which acts as a stand-in for the
7063 corresponding formal parameter (of the inline function) will look
7064 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
7065 exactly a compile-time constant expression, but it isn't the address
7066 of the (artificial) local variable either. Rather, it represents the
7067 *value* which the artificial local variable always has during its
7068 lifetime. We currently have no way to represent such quasi-constant
7069 values in Dwarf, so for now we just punt and generate nothing. */
7073 /* No other kinds of rtx should be possible here. */
7079 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
7080 data attribute for a variable or a parameter. We generate the
7081 DW_AT_const_value attribute only in those cases where the given variable
7082 or parameter does not have a true "location" either in memory or in a
7083 register. This can happen (for example) when a constant is passed as an
7084 actual argument in a call to an inline function. (It's possible that
7085 these things can crop up in other ways also.) Note that one type of
7086 constant value which can be passed into an inlined function is a constant
7087 pointer. This can happen for example if an actual argument in an inlined
7088 function call evaluates to a compile-time constant address. */
7091 add_location_or_const_value_attribute (die, decl)
7092 register dw_die_ref die;
7096 register tree declared_type;
7097 register tree passed_type;
7099 if (TREE_CODE (decl) == ERROR_MARK)
7102 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
7105 /* Here we have to decide where we are going to say the parameter "lives"
7106 (as far as the debugger is concerned). We only have a couple of
7107 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
7109 DECL_RTL normally indicates where the parameter lives during most of the
7110 activation of the function. If optimization is enabled however, this
7111 could be either NULL or else a pseudo-reg. Both of those cases indicate
7112 that the parameter doesn't really live anywhere (as far as the code
7113 generation parts of GCC are concerned) during most of the function's
7114 activation. That will happen (for example) if the parameter is never
7115 referenced within the function.
7117 We could just generate a location descriptor here for all non-NULL
7118 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
7119 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
7120 where DECL_RTL is NULL or is a pseudo-reg.
7122 Note however that we can only get away with using DECL_INCOMING_RTL as
7123 a backup substitute for DECL_RTL in certain limited cases. In cases
7124 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7125 we can be sure that the parameter was passed using the same type as it is
7126 declared to have within the function, and that its DECL_INCOMING_RTL
7127 points us to a place where a value of that type is passed.
7129 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7130 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7131 because in these cases DECL_INCOMING_RTL points us to a value of some
7132 type which is *different* from the type of the parameter itself. Thus,
7133 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7134 such cases, the debugger would end up (for example) trying to fetch a
7135 `float' from a place which actually contains the first part of a
7136 `double'. That would lead to really incorrect and confusing
7137 output at debug-time.
7139 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7140 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7141 are a couple of exceptions however. On little-endian machines we can
7142 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7143 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7144 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7145 when (on a little-endian machine) a non-prototyped function has a
7146 parameter declared to be of type `short' or `char'. In such cases,
7147 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7148 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7149 passed `int' value. If the debugger then uses that address to fetch
7150 a `short' or a `char' (on a little-endian machine) the result will be
7151 the correct data, so we allow for such exceptional cases below.
7153 Note that our goal here is to describe the place where the given formal
7154 parameter lives during most of the function's activation (i.e. between
7155 the end of the prologue and the start of the epilogue). We'll do that
7156 as best as we can. Note however that if the given formal parameter is
7157 modified sometime during the execution of the function, then a stack
7158 backtrace (at debug-time) will show the function as having been
7159 called with the *new* value rather than the value which was
7160 originally passed in. This happens rarely enough that it is not
7161 a major problem, but it *is* a problem, and I'd like to fix it.
7163 A future version of dwarf2out.c may generate two additional
7164 attributes for any given DW_TAG_formal_parameter DIE which will
7165 describe the "passed type" and the "passed location" for the
7166 given formal parameter in addition to the attributes we now
7167 generate to indicate the "declared type" and the "active
7168 location" for each parameter. This additional set of attributes
7169 could be used by debuggers for stack backtraces. Separately, note
7170 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7171 NULL also. This happens (for example) for inlined-instances of
7172 inline function formal parameters which are never referenced.
7173 This really shouldn't be happening. All PARM_DECL nodes should
7174 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7175 doesn't currently generate these values for inlined instances of
7176 inline function parameters, so when we see such cases, we are
7177 just out-of-luck for the time being (until integrate.c
7180 /* Use DECL_RTL as the "location" unless we find something better. */
7181 rtl = DECL_RTL (decl);
7183 if (TREE_CODE (decl) == PARM_DECL)
7185 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7187 declared_type = type_main_variant (TREE_TYPE (decl));
7188 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7190 /* This decl represents a formal parameter which was optimized out.
7191 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7192 all* cases where (rtl == NULL_RTX) just below. */
7193 if (declared_type == passed_type)
7194 rtl = DECL_INCOMING_RTL (decl);
7195 else if (! BYTES_BIG_ENDIAN
7196 && TREE_CODE (declared_type) == INTEGER_TYPE
7197 && (GET_MODE_SIZE (TYPE_MODE (declared_type))
7198 <= GET_MODE_SIZE (TYPE_MODE (passed_type))))
7199 rtl = DECL_INCOMING_RTL (decl);
7202 /* If the parm was passed in registers, but lives on the stack, then
7203 make a big endian correction if the mode of the type of the
7204 parameter is not the same as the mode of the rtl. */
7205 /* ??? This is the same series of checks that are made in dbxout.c before
7206 we reach the big endian correction code there. It isn't clear if all
7207 of these checks are necessary here, but keeping them all is the safe
7209 else if (GET_CODE (rtl) == MEM
7210 && XEXP (rtl, 0) != const0_rtx
7211 && ! CONSTANT_P (XEXP (rtl, 0))
7212 /* Not passed in memory. */
7213 && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM
7214 /* Not passed by invisible reference. */
7215 && (GET_CODE (XEXP (rtl, 0)) != REG
7216 || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM
7217 || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM
7218 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
7219 || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM
7222 /* Big endian correction check. */
7224 && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl)
7225 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))
7228 int offset = (UNITS_PER_WORD
7229 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))));
7230 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
7231 plus_constant (XEXP (rtl, 0), offset));
7235 if (rtl == NULL_RTX)
7238 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7239 #ifdef LEAF_REG_REMAP
7240 if (current_function_uses_only_leaf_regs)
7241 leaf_renumber_regs_insn (rtl);
7244 switch (GET_CODE (rtl))
7247 /* The address of a variable that was optimized away; don't emit
7258 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7259 add_const_value_attribute (die, rtl);
7266 add_AT_location_description (die, DW_AT_location, rtl);
7274 /* Generate an DW_AT_name attribute given some string value to be included as
7275 the value of the attribute. */
7278 add_name_attribute (die, name_string)
7279 register dw_die_ref die;
7280 register const char *name_string;
7282 if (name_string != NULL && *name_string != 0)
7283 add_AT_string (die, DW_AT_name, name_string);
7286 /* Given a tree node describing an array bound (either lower or upper) output
7287 a representation for that bound. */
7290 add_bound_info (subrange_die, bound_attr, bound)
7291 register dw_die_ref subrange_die;
7292 register enum dwarf_attribute bound_attr;
7293 register tree bound;
7295 register unsigned bound_value = 0;
7297 /* If this is an Ada unconstrained array type, then don't emit any debug
7298 info because the array bounds are unknown. They are parameterized when
7299 the type is instantiated. */
7300 if (contains_placeholder_p (bound))
7303 switch (TREE_CODE (bound))
7308 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7310 bound_value = TREE_INT_CST_LOW (bound);
7311 if (bound_attr == DW_AT_lower_bound
7312 && ((is_c_family () && bound_value == 0)
7313 || (is_fortran () && bound_value == 1)))
7314 /* use the default */;
7316 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7321 case NON_LVALUE_EXPR:
7322 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7326 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7327 access the upper bound values may be bogus. If they refer to a
7328 register, they may only describe how to get at these values at the
7329 points in the generated code right after they have just been
7330 computed. Worse yet, in the typical case, the upper bound values
7331 will not even *be* computed in the optimized code (though the
7332 number of elements will), so these SAVE_EXPRs are entirely
7333 bogus. In order to compensate for this fact, we check here to see
7334 if optimization is enabled, and if so, we don't add an attribute
7335 for the (unknown and unknowable) upper bound. This should not
7336 cause too much trouble for existing (stupid?) debuggers because
7337 they have to deal with empty upper bounds location descriptions
7338 anyway in order to be able to deal with incomplete array types.
7339 Of course an intelligent debugger (GDB?) should be able to
7340 comprehend that a missing upper bound specification in a array
7341 type used for a storage class `auto' local array variable
7342 indicates that the upper bound is both unknown (at compile- time)
7343 and unknowable (at run-time) due to optimization.
7345 We assume that a MEM rtx is safe because gcc wouldn't put the
7346 value there unless it was going to be used repeatedly in the
7347 function, i.e. for cleanups. */
7348 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7350 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7351 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7352 register rtx loc = SAVE_EXPR_RTL (bound);
7354 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7355 it references an outer function's frame. */
7357 if (GET_CODE (loc) == MEM)
7359 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7361 if (XEXP (loc, 0) != new_addr)
7362 loc = gen_rtx (MEM, GET_MODE (loc), new_addr);
7365 add_AT_flag (decl_die, DW_AT_artificial, 1);
7366 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7367 add_AT_location_description (decl_die, DW_AT_location, loc);
7368 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7371 /* Else leave out the attribute. */
7377 /* ??? These types of bounds can be created by the Ada front end,
7378 and it isn't clear how to emit debug info for them. */
7386 /* Note that the block of subscript information for an array type also
7387 includes information about the element type of type given array type. */
7390 add_subscript_info (type_die, type)
7391 register dw_die_ref type_die;
7394 #ifndef MIPS_DEBUGGING_INFO
7395 register unsigned dimension_number;
7397 register tree lower, upper;
7398 register dw_die_ref subrange_die;
7400 /* The GNU compilers represent multidimensional array types as sequences of
7401 one dimensional array types whose element types are themselves array
7402 types. Here we squish that down, so that each multidimensional array
7403 type gets only one array_type DIE in the Dwarf debugging info. The draft
7404 Dwarf specification say that we are allowed to do this kind of
7405 compression in C (because there is no difference between an array or
7406 arrays and a multidimensional array in C) but for other source languages
7407 (e.g. Ada) we probably shouldn't do this. */
7409 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7410 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7411 We work around this by disabling this feature. See also
7412 gen_array_type_die. */
7413 #ifndef MIPS_DEBUGGING_INFO
7414 for (dimension_number = 0;
7415 TREE_CODE (type) == ARRAY_TYPE;
7416 type = TREE_TYPE (type), dimension_number++)
7419 register tree domain = TYPE_DOMAIN (type);
7421 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7422 and (in GNU C only) variable bounds. Handle all three forms
7424 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7427 /* We have an array type with specified bounds. */
7428 lower = TYPE_MIN_VALUE (domain);
7429 upper = TYPE_MAX_VALUE (domain);
7431 /* define the index type. */
7432 if (TREE_TYPE (domain))
7434 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7435 TREE_TYPE field. We can't emit debug info for this
7436 because it is an unnamed integral type. */
7437 if (TREE_CODE (domain) == INTEGER_TYPE
7438 && TYPE_NAME (domain) == NULL_TREE
7439 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7440 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7443 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7447 /* ??? If upper is NULL, the array has unspecified length,
7448 but it does have a lower bound. This happens with Fortran
7450 Since the debugger is definitely going to need to know N
7451 to produce useful results, go ahead and output the lower
7452 bound solo, and hope the debugger can cope. */
7454 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7456 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7459 /* We have an array type with an unspecified length. The DWARF-2
7460 spec does not say how to handle this; let's just leave out the
7465 #ifndef MIPS_DEBUGGING_INFO
7471 add_byte_size_attribute (die, tree_node)
7473 register tree tree_node;
7475 register unsigned size;
7477 switch (TREE_CODE (tree_node))
7485 case QUAL_UNION_TYPE:
7486 size = int_size_in_bytes (tree_node);
7489 /* For a data member of a struct or union, the DW_AT_byte_size is
7490 generally given as the number of bytes normally allocated for an
7491 object of the *declared* type of the member itself. This is true
7492 even for bit-fields. */
7493 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7499 /* Note that `size' might be -1 when we get to this point. If it is, that
7500 indicates that the byte size of the entity in question is variable. We
7501 have no good way of expressing this fact in Dwarf at the present time,
7502 so just let the -1 pass on through. */
7504 add_AT_unsigned (die, DW_AT_byte_size, size);
7507 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7508 which specifies the distance in bits from the highest order bit of the
7509 "containing object" for the bit-field to the highest order bit of the
7512 For any given bit-field, the "containing object" is a hypothetical
7513 object (of some integral or enum type) within which the given bit-field
7514 lives. The type of this hypothetical "containing object" is always the
7515 same as the declared type of the individual bit-field itself. The
7516 determination of the exact location of the "containing object" for a
7517 bit-field is rather complicated. It's handled by the
7518 `field_byte_offset' function (above).
7520 Note that it is the size (in bytes) of the hypothetical "containing object"
7521 which will be given in the DW_AT_byte_size attribute for this bit-field.
7522 (See `byte_size_attribute' above). */
7525 add_bit_offset_attribute (die, decl)
7526 register dw_die_ref die;
7529 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7530 register tree type = DECL_BIT_FIELD_TYPE (decl);
7531 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7532 register unsigned bitpos_int;
7533 register unsigned highest_order_object_bit_offset;
7534 register unsigned highest_order_field_bit_offset;
7535 register unsigned bit_offset;
7537 /* Must be a field and a bit field. */
7539 || TREE_CODE (decl) != FIELD_DECL)
7542 /* We can't yet handle bit-fields whose offsets are variable, so if we
7543 encounter such things, just return without generating any attribute
7545 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7548 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7550 /* Note that the bit offset is always the distance (in bits) from the
7551 highest-order bit of the "containing object" to the highest-order bit of
7552 the bit-field itself. Since the "high-order end" of any object or field
7553 is different on big-endian and little-endian machines, the computation
7554 below must take account of these differences. */
7555 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7556 highest_order_field_bit_offset = bitpos_int;
7558 if (! BYTES_BIG_ENDIAN)
7560 highest_order_field_bit_offset
7561 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7563 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7567 = (! BYTES_BIG_ENDIAN
7568 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7569 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7571 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7574 /* For a FIELD_DECL node which represents a bit field, output an attribute
7575 which specifies the length in bits of the given field. */
7578 add_bit_size_attribute (die, decl)
7579 register dw_die_ref die;
7582 /* Must be a field and a bit field. */
7583 if (TREE_CODE (decl) != FIELD_DECL
7584 || ! DECL_BIT_FIELD_TYPE (decl))
7586 add_AT_unsigned (die, DW_AT_bit_size,
7587 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7590 /* If the compiled language is ANSI C, then add a 'prototyped'
7591 attribute, if arg types are given for the parameters of a function. */
7594 add_prototyped_attribute (die, func_type)
7595 register dw_die_ref die;
7596 register tree func_type;
7598 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7599 && TYPE_ARG_TYPES (func_type) != NULL)
7600 add_AT_flag (die, DW_AT_prototyped, 1);
7604 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7605 by looking in either the type declaration or object declaration
7609 add_abstract_origin_attribute (die, origin)
7610 register dw_die_ref die;
7611 register tree origin;
7613 dw_die_ref origin_die = NULL;
7614 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7615 origin_die = lookup_decl_die (origin);
7616 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7617 origin_die = lookup_type_die (origin);
7619 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7622 /* We do not currently support the pure_virtual attribute. */
7625 add_pure_or_virtual_attribute (die, func_decl)
7626 register dw_die_ref die;
7627 register tree func_decl;
7629 if (DECL_VINDEX (func_decl))
7631 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7632 add_AT_loc (die, DW_AT_vtable_elem_location,
7633 new_loc_descr (DW_OP_constu,
7634 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7637 /* GNU extension: Record what type this method came from originally. */
7638 if (debug_info_level > DINFO_LEVEL_TERSE)
7639 add_AT_die_ref (die, DW_AT_containing_type,
7640 lookup_type_die (DECL_CONTEXT (func_decl)));
7644 /* Add source coordinate attributes for the given decl. */
7647 add_src_coords_attributes (die, decl)
7648 register dw_die_ref die;
7651 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7653 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7654 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7657 /* Add an DW_AT_name attribute and source coordinate attribute for the
7658 given decl, but only if it actually has a name. */
7661 add_name_and_src_coords_attributes (die, decl)
7662 register dw_die_ref die;
7665 register tree decl_name;
7667 decl_name = DECL_NAME (decl);
7668 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7670 add_name_attribute (die, dwarf2_name (decl, 0));
7671 add_src_coords_attributes (die, decl);
7672 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7673 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7674 add_AT_string (die, DW_AT_MIPS_linkage_name,
7675 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7679 /* Push a new declaration scope. */
7682 push_decl_scope (scope)
7685 tree containing_scope;
7688 /* Make room in the decl_scope_table, if necessary. */
7689 if (decl_scope_table_allocated == decl_scope_depth)
7691 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7693 = (decl_scope_node *) xrealloc (decl_scope_table,
7694 (decl_scope_table_allocated
7695 * sizeof (decl_scope_node)));
7698 decl_scope_table[decl_scope_depth].scope = scope;
7700 /* Sometimes, while recursively emitting subtypes within a class type,
7701 we end up recuring on a subtype at a higher level then the current
7702 subtype. In such a case, we need to search the decl_scope_table to
7703 find the parent of this subtype. */
7705 if (AGGREGATE_TYPE_P (scope))
7706 containing_scope = TYPE_CONTEXT (scope);
7708 containing_scope = NULL_TREE;
7710 /* The normal case. */
7711 if (decl_scope_depth == 0
7712 || containing_scope == NULL_TREE
7713 /* Ignore namespaces for the moment. */
7714 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7715 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7716 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7719 /* We need to search for the containing_scope. */
7720 for (i = 0; i < decl_scope_depth; i++)
7721 if (decl_scope_table[i].scope == containing_scope)
7724 if (i == decl_scope_depth)
7727 decl_scope_table[decl_scope_depth].previous = i;
7733 /* Return the DIE for the scope that immediately contains this declaration. */
7736 scope_die_for (t, context_die)
7738 register dw_die_ref context_die;
7740 register dw_die_ref scope_die = NULL;
7741 register tree containing_scope;
7744 /* Walk back up the declaration tree looking for a place to define
7746 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7747 containing_scope = TYPE_CONTEXT (t);
7748 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7749 containing_scope = decl_class_context (t);
7751 containing_scope = DECL_CONTEXT (t);
7753 /* Ignore namespaces for the moment. */
7754 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7755 containing_scope = NULL_TREE;
7757 /* Ignore function type "scopes" from the C frontend. They mean that
7758 a tagged type is local to a parmlist of a function declarator, but
7759 that isn't useful to DWARF. */
7760 if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE)
7761 containing_scope = NULL_TREE;
7763 /* Function-local tags and functions get stuck in limbo until they are
7764 fixed up by decls_for_scope. */
7765 if (context_die == NULL && containing_scope != NULL_TREE
7766 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7769 if (containing_scope == NULL_TREE)
7770 scope_die = comp_unit_die;
7773 for (i = decl_scope_depth - 1, scope_die = context_die;
7774 i >= 0 && decl_scope_table[i].scope != containing_scope;
7775 (scope_die = scope_die->die_parent,
7776 i = decl_scope_table[i].previous))
7779 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7780 does it try to handle types defined by TYPE_DECLs. Such types
7781 thus have an incorrect TYPE_CONTEXT, which points to the block
7782 they were originally defined in, instead of the current block
7783 created by function inlining. We try to detect that here and
7786 if (i < 0 && scope_die == comp_unit_die
7787 && TREE_CODE (containing_scope) == BLOCK
7788 && is_tagged_type (t)
7789 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7790 == containing_scope))
7792 scope_die = context_die;
7793 /* Since the checks below are no longer applicable. */
7799 if (TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7801 if (debug_info_level > DINFO_LEVEL_TERSE
7802 && !TREE_ASM_WRITTEN (containing_scope))
7805 /* If none of the current dies are suitable, we get file scope. */
7806 scope_die = comp_unit_die;
7813 /* Pop a declaration scope. */
7817 if (decl_scope_depth <= 0)
7822 /* Many forms of DIEs require a "type description" attribute. This
7823 routine locates the proper "type descriptor" die for the type given
7824 by 'type', and adds an DW_AT_type attribute below the given die. */
7827 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7828 register dw_die_ref object_die;
7830 register int decl_const;
7831 register int decl_volatile;
7832 register dw_die_ref context_die;
7834 register enum tree_code code = TREE_CODE (type);
7835 register dw_die_ref type_die = NULL;
7837 /* ??? If this type is an unnamed subrange type of an integral or
7838 floating-point type, use the inner type. This is because we have no
7839 support for unnamed types in base_type_die. This can happen if this is
7840 an Ada subrange type. Correct solution is emit a subrange type die. */
7841 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7842 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7843 type = TREE_TYPE (type), code = TREE_CODE (type);
7845 if (code == ERROR_MARK)
7848 /* Handle a special case. For functions whose return type is void, we
7849 generate *no* type attribute. (Note that no object may have type
7850 `void', so this only applies to function return types). */
7851 if (code == VOID_TYPE)
7854 type_die = modified_type_die (type,
7855 decl_const || TYPE_READONLY (type),
7856 decl_volatile || TYPE_VOLATILE (type),
7858 if (type_die != NULL)
7859 add_AT_die_ref (object_die, DW_AT_type, type_die);
7862 /* Given a tree pointer to a struct, class, union, or enum type node, return
7863 a pointer to the (string) tag name for the given type, or zero if the type
7864 was declared without a tag. */
7870 register char *name = 0;
7872 if (TYPE_NAME (type) != 0)
7874 register tree t = 0;
7876 /* Find the IDENTIFIER_NODE for the type name. */
7877 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7878 t = TYPE_NAME (type);
7880 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7881 a TYPE_DECL node, regardless of whether or not a `typedef' was
7883 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7884 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7885 t = DECL_NAME (TYPE_NAME (type));
7887 /* Now get the name as a string, or invent one. */
7889 name = IDENTIFIER_POINTER (t);
7892 return (name == 0 || *name == '\0') ? 0 : name;
7895 /* Return the type associated with a data member, make a special check
7896 for bit field types. */
7899 member_declared_type (member)
7900 register tree member;
7902 return (DECL_BIT_FIELD_TYPE (member)
7903 ? DECL_BIT_FIELD_TYPE (member)
7904 : TREE_TYPE (member));
7907 /* Get the decl's label, as described by its RTL. This may be different
7908 from the DECL_NAME name used in the source file. */
7912 decl_start_label (decl)
7917 x = DECL_RTL (decl);
7918 if (GET_CODE (x) != MEM)
7922 if (GET_CODE (x) != SYMBOL_REF)
7925 fnname = XSTR (x, 0);
7930 /* These routines generate the internal representation of the DIE's for
7931 the compilation unit. Debugging information is collected by walking
7932 the declaration trees passed in from dwarf2out_decl(). */
7935 gen_array_type_die (type, context_die)
7937 register dw_die_ref context_die;
7939 register dw_die_ref scope_die = scope_die_for (type, context_die);
7940 register dw_die_ref array_die;
7941 register tree element_type;
7943 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7944 the inner array type comes before the outer array type. Thus we must
7945 call gen_type_die before we call new_die. See below also. */
7946 #ifdef MIPS_DEBUGGING_INFO
7947 gen_type_die (TREE_TYPE (type), context_die);
7950 array_die = new_die (DW_TAG_array_type, scope_die);
7953 /* We default the array ordering. SDB will probably do
7954 the right things even if DW_AT_ordering is not present. It's not even
7955 an issue until we start to get into multidimensional arrays anyway. If
7956 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7957 then we'll have to put the DW_AT_ordering attribute back in. (But if
7958 and when we find out that we need to put these in, we will only do so
7959 for multidimensional arrays. */
7960 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
7963 #ifdef MIPS_DEBUGGING_INFO
7964 /* The SGI compilers handle arrays of unknown bound by setting
7965 AT_declaration and not emitting any subrange DIEs. */
7966 if (! TYPE_DOMAIN (type))
7967 add_AT_unsigned (array_die, DW_AT_declaration, 1);
7970 add_subscript_info (array_die, type);
7972 equate_type_number_to_die (type, array_die);
7974 /* Add representation of the type of the elements of this array type. */
7975 element_type = TREE_TYPE (type);
7977 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7978 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7979 We work around this by disabling this feature. See also
7980 add_subscript_info. */
7981 #ifndef MIPS_DEBUGGING_INFO
7982 while (TREE_CODE (element_type) == ARRAY_TYPE)
7983 element_type = TREE_TYPE (element_type);
7985 gen_type_die (element_type, context_die);
7988 add_type_attribute (array_die, element_type, 0, 0, context_die);
7992 gen_set_type_die (type, context_die)
7994 register dw_die_ref context_die;
7996 register dw_die_ref type_die
7997 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
7999 equate_type_number_to_die (type, type_die);
8000 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
8005 gen_entry_point_die (decl, context_die)
8007 register dw_die_ref context_die;
8009 register tree origin = decl_ultimate_origin (decl);
8010 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
8012 add_abstract_origin_attribute (decl_die, origin);
8015 add_name_and_src_coords_attributes (decl_die, decl);
8016 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
8020 if (DECL_ABSTRACT (decl))
8021 equate_decl_number_to_die (decl, decl_die);
8023 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
8027 /* Remember a type in the pending_types_list. */
8033 if (pending_types == pending_types_allocated)
8035 pending_types_allocated += PENDING_TYPES_INCREMENT;
8037 = (tree *) xrealloc (pending_types_list,
8038 sizeof (tree) * pending_types_allocated);
8041 pending_types_list[pending_types++] = type;
8044 /* Output any pending types (from the pending_types list) which we can output
8045 now (taking into account the scope that we are working on now).
8047 For each type output, remove the given type from the pending_types_list
8048 *before* we try to output it. */
8051 output_pending_types_for_scope (context_die)
8052 register dw_die_ref context_die;
8056 while (pending_types)
8059 type = pending_types_list[pending_types];
8060 gen_type_die (type, context_die);
8061 if (!TREE_ASM_WRITTEN (type))
8066 /* Remember a type in the incomplete_types_list. */
8069 add_incomplete_type (type)
8072 if (incomplete_types == incomplete_types_allocated)
8074 incomplete_types_allocated += INCOMPLETE_TYPES_INCREMENT;
8075 incomplete_types_list
8076 = (tree *) xrealloc (incomplete_types_list,
8077 sizeof (tree) * incomplete_types_allocated);
8080 incomplete_types_list[incomplete_types++] = type;
8083 /* Walk through the list of incomplete types again, trying once more to
8084 emit full debugging info for them. */
8087 retry_incomplete_types ()
8091 while (incomplete_types)
8094 type = incomplete_types_list[incomplete_types];
8095 gen_type_die (type, comp_unit_die);
8099 /* Generate a DIE to represent an inlined instance of an enumeration type. */
8102 gen_inlined_enumeration_type_die (type, context_die)
8104 register dw_die_ref context_die;
8106 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
8107 scope_die_for (type, context_die));
8109 if (!TREE_ASM_WRITTEN (type))
8111 add_abstract_origin_attribute (type_die, type);
8114 /* Generate a DIE to represent an inlined instance of a structure type. */
8117 gen_inlined_structure_type_die (type, context_die)
8119 register dw_die_ref context_die;
8121 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
8122 scope_die_for (type, context_die));
8124 if (!TREE_ASM_WRITTEN (type))
8126 add_abstract_origin_attribute (type_die, type);
8129 /* Generate a DIE to represent an inlined instance of a union type. */
8132 gen_inlined_union_type_die (type, context_die)
8134 register dw_die_ref context_die;
8136 register dw_die_ref type_die = new_die (DW_TAG_union_type,
8137 scope_die_for (type, context_die));
8139 if (!TREE_ASM_WRITTEN (type))
8141 add_abstract_origin_attribute (type_die, type);
8144 /* Generate a DIE to represent an enumeration type. Note that these DIEs
8145 include all of the information about the enumeration values also. Each
8146 enumerated type name/value is listed as a child of the enumerated type
8150 gen_enumeration_type_die (type, context_die)
8152 register dw_die_ref context_die;
8154 register dw_die_ref type_die = lookup_type_die (type);
8156 if (type_die == NULL)
8158 type_die = new_die (DW_TAG_enumeration_type,
8159 scope_die_for (type, context_die));
8160 equate_type_number_to_die (type, type_die);
8161 add_name_attribute (type_die, type_tag (type));
8163 else if (! TYPE_SIZE (type))
8166 remove_AT (type_die, DW_AT_declaration);
8168 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
8169 given enum type is incomplete, do not generate the DW_AT_byte_size
8170 attribute or the DW_AT_element_list attribute. */
8171 if (TYPE_SIZE (type))
8175 TREE_ASM_WRITTEN (type) = 1;
8176 add_byte_size_attribute (type_die, type);
8177 if (TYPE_STUB_DECL (type) != NULL_TREE)
8178 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8180 /* If the first reference to this type was as the return type of an
8181 inline function, then it may not have a parent. Fix this now. */
8182 if (type_die->die_parent == NULL)
8183 add_child_die (scope_die_for (type, context_die), type_die);
8185 for (link = TYPE_FIELDS (type);
8186 link != NULL; link = TREE_CHAIN (link))
8188 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
8190 add_name_attribute (enum_die,
8191 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
8192 add_AT_unsigned (enum_die, DW_AT_const_value,
8193 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
8197 add_AT_flag (type_die, DW_AT_declaration, 1);
8201 /* Generate a DIE to represent either a real live formal parameter decl or to
8202 represent just the type of some formal parameter position in some function
8205 Note that this routine is a bit unusual because its argument may be a
8206 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8207 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8208 node. If it's the former then this function is being called to output a
8209 DIE to represent a formal parameter object (or some inlining thereof). If
8210 it's the latter, then this function is only being called to output a
8211 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8212 argument type of some subprogram type. */
8215 gen_formal_parameter_die (node, context_die)
8217 register dw_die_ref context_die;
8219 register dw_die_ref parm_die
8220 = new_die (DW_TAG_formal_parameter, context_die);
8221 register tree origin;
8223 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8226 origin = decl_ultimate_origin (node);
8228 add_abstract_origin_attribute (parm_die, origin);
8231 add_name_and_src_coords_attributes (parm_die, node);
8232 add_type_attribute (parm_die, TREE_TYPE (node),
8233 TREE_READONLY (node),
8234 TREE_THIS_VOLATILE (node),
8236 if (DECL_ARTIFICIAL (node))
8237 add_AT_flag (parm_die, DW_AT_artificial, 1);
8240 equate_decl_number_to_die (node, parm_die);
8241 if (! DECL_ABSTRACT (node))
8242 add_location_or_const_value_attribute (parm_die, node);
8247 /* We were called with some kind of a ..._TYPE node. */
8248 add_type_attribute (parm_die, node, 0, 0, context_die);
8258 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8259 at the end of an (ANSI prototyped) formal parameters list. */
8262 gen_unspecified_parameters_die (decl_or_type, context_die)
8263 register tree decl_or_type ATTRIBUTE_UNUSED;
8264 register dw_die_ref context_die;
8266 new_die (DW_TAG_unspecified_parameters, context_die);
8269 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8270 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8271 parameters as specified in some function type specification (except for
8272 those which appear as part of a function *definition*).
8274 Note we must be careful here to output all of the parameter DIEs before*
8275 we output any DIEs needed to represent the types of the formal parameters.
8276 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8277 non-parameter DIE it sees ends the formal parameter list. */
8280 gen_formal_types_die (function_or_method_type, context_die)
8281 register tree function_or_method_type;
8282 register dw_die_ref context_die;
8285 register tree formal_type = NULL;
8286 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8289 /* In the case where we are generating a formal types list for a C++
8290 non-static member function type, skip over the first thing on the
8291 TYPE_ARG_TYPES list because it only represents the type of the hidden
8292 `this pointer'. The debugger should be able to figure out (without
8293 being explicitly told) that this non-static member function type takes a
8294 `this pointer' and should be able to figure what the type of that hidden
8295 parameter is from the DW_AT_member attribute of the parent
8296 DW_TAG_subroutine_type DIE. */
8297 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8298 first_parm_type = TREE_CHAIN (first_parm_type);
8301 /* Make our first pass over the list of formal parameter types and output a
8302 DW_TAG_formal_parameter DIE for each one. */
8303 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8305 register dw_die_ref parm_die;
8307 formal_type = TREE_VALUE (link);
8308 if (formal_type == void_type_node)
8311 /* Output a (nameless) DIE to represent the formal parameter itself. */
8312 parm_die = gen_formal_parameter_die (formal_type, context_die);
8313 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8314 && link == first_parm_type)
8315 add_AT_flag (parm_die, DW_AT_artificial, 1);
8318 /* If this function type has an ellipsis, add a
8319 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8320 if (formal_type != void_type_node)
8321 gen_unspecified_parameters_die (function_or_method_type, context_die);
8323 /* Make our second (and final) pass over the list of formal parameter types
8324 and output DIEs to represent those types (as necessary). */
8325 for (link = TYPE_ARG_TYPES (function_or_method_type);
8327 link = TREE_CHAIN (link))
8329 formal_type = TREE_VALUE (link);
8330 if (formal_type == void_type_node)
8333 gen_type_die (formal_type, context_die);
8337 /* Generate a DIE to represent a declared function (either file-scope or
8341 gen_subprogram_die (decl, context_die)
8343 register dw_die_ref context_die;
8345 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8346 register tree origin = decl_ultimate_origin (decl);
8347 register dw_die_ref subr_die;
8348 register rtx fp_reg;
8349 register tree fn_arg_types;
8350 register tree outer_scope;
8351 register dw_die_ref old_die = lookup_decl_die (decl);
8352 register int declaration
8353 = (current_function_decl != decl
8355 && (context_die->die_tag == DW_TAG_structure_type
8356 || context_die->die_tag == DW_TAG_union_type)));
8360 subr_die = new_die (DW_TAG_subprogram, context_die);
8361 add_abstract_origin_attribute (subr_die, origin);
8363 else if (old_die && DECL_ABSTRACT (decl)
8364 && get_AT_unsigned (old_die, DW_AT_inline))
8366 /* This must be a redefinition of an extern inline function.
8367 We can just reuse the old die here. */
8370 /* Clear out the inlined attribute and parm types. */
8371 remove_AT (subr_die, DW_AT_inline);
8372 remove_children (subr_die);
8376 register unsigned file_index
8377 = lookup_filename (DECL_SOURCE_FILE (decl));
8379 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8381 /* ??? This can happen if there is a bug in the program, for
8382 instance, if it has duplicate function definitions. Ideally,
8383 we should detect this case and ignore it. For now, if we have
8384 already reported an error, any error at all, then assume that
8385 we got here because of a input error, not a dwarf2 bug. */
8391 /* If the definition comes from the same place as the declaration,
8392 maybe use the old DIE. We always want the DIE for this function
8393 that has the *_pc attributes to be under comp_unit_die so the
8394 debugger can find it. For inlines, that is the concrete instance,
8395 so we can use the old DIE here. For non-inline methods, we want a
8396 specification DIE at toplevel, so we need a new DIE. For local
8397 class methods, this does not apply. */
8398 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8399 || context_die == NULL)
8400 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8401 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8402 == (unsigned)DECL_SOURCE_LINE (decl)))
8406 /* Clear out the declaration attribute and the parm types. */
8407 remove_AT (subr_die, DW_AT_declaration);
8408 remove_children (subr_die);
8412 subr_die = new_die (DW_TAG_subprogram, context_die);
8413 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8414 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8415 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8416 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8417 != (unsigned)DECL_SOURCE_LINE (decl))
8419 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8424 register dw_die_ref scope_die;
8426 if (DECL_CONTEXT (decl))
8427 scope_die = scope_die_for (decl, context_die);
8429 /* Don't put block extern declarations under comp_unit_die. */
8430 scope_die = context_die;
8432 subr_die = new_die (DW_TAG_subprogram, scope_die);
8434 if (TREE_PUBLIC (decl))
8435 add_AT_flag (subr_die, DW_AT_external, 1);
8437 add_name_and_src_coords_attributes (subr_die, decl);
8438 if (debug_info_level > DINFO_LEVEL_TERSE)
8440 register tree type = TREE_TYPE (decl);
8442 add_prototyped_attribute (subr_die, type);
8443 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8446 add_pure_or_virtual_attribute (subr_die, decl);
8447 if (DECL_ARTIFICIAL (decl))
8448 add_AT_flag (subr_die, DW_AT_artificial, 1);
8449 if (TREE_PROTECTED (decl))
8450 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8451 else if (TREE_PRIVATE (decl))
8452 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8457 add_AT_flag (subr_die, DW_AT_declaration, 1);
8459 /* The first time we see a member function, it is in the context of
8460 the class to which it belongs. We make sure of this by emitting
8461 the class first. The next time is the definition, which is
8462 handled above. The two may come from the same source text. */
8463 if (DECL_CONTEXT (decl))
8464 equate_decl_number_to_die (decl, subr_die);
8466 else if (DECL_ABSTRACT (decl))
8468 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8469 but not for extern inline functions. We can't get this completely
8470 correct because information about whether the function was declared
8471 inline is not saved anywhere. */
8472 if (DECL_DEFER_OUTPUT (decl))
8474 if (DECL_INLINE (decl))
8475 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8477 add_AT_unsigned (subr_die, DW_AT_inline,
8478 DW_INL_declared_not_inlined);
8480 else if (DECL_INLINE (decl))
8481 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8485 equate_decl_number_to_die (decl, subr_die);
8487 else if (!DECL_EXTERNAL (decl))
8489 if (origin == NULL_TREE)
8490 equate_decl_number_to_die (decl, subr_die);
8492 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8493 current_funcdef_number);
8494 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8495 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8496 current_funcdef_number);
8497 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8499 add_pubname (decl, subr_die);
8500 add_arange (decl, subr_die);
8502 #ifdef MIPS_DEBUGGING_INFO
8503 /* Add a reference to the FDE for this routine. */
8504 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8507 /* Define the "frame base" location for this routine. We use the
8508 frame pointer or stack pointer registers, since the RTL for local
8509 variables is relative to one of them. */
8511 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8512 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8515 /* ??? This fails for nested inline functions, because context_display
8516 is not part of the state saved/restored for inline functions. */
8517 if (current_function_needs_context)
8518 add_AT_location_description (subr_die, DW_AT_static_link,
8519 lookup_static_chain (decl));
8523 /* Now output descriptions of the arguments for this function. This gets
8524 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8525 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8526 `...' at the end of the formal parameter list. In order to find out if
8527 there was a trailing ellipsis or not, we must instead look at the type
8528 associated with the FUNCTION_DECL. This will be a node of type
8529 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8530 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8531 an ellipsis at the end. */
8532 push_decl_scope (decl);
8534 /* In the case where we are describing a mere function declaration, all we
8535 need to do here (and all we *can* do here) is to describe the *types* of
8536 its formal parameters. */
8537 if (debug_info_level <= DINFO_LEVEL_TERSE)
8539 else if (declaration)
8540 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8543 /* Generate DIEs to represent all known formal parameters */
8544 register tree arg_decls = DECL_ARGUMENTS (decl);
8547 /* When generating DIEs, generate the unspecified_parameters DIE
8548 instead if we come across the arg "__builtin_va_alist" */
8549 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8550 if (TREE_CODE (parm) == PARM_DECL)
8552 if (DECL_NAME (parm)
8553 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8554 "__builtin_va_alist"))
8555 gen_unspecified_parameters_die (parm, subr_die);
8557 gen_decl_die (parm, subr_die);
8560 /* Decide whether we need a unspecified_parameters DIE at the end.
8561 There are 2 more cases to do this for: 1) the ansi ... declaration -
8562 this is detectable when the end of the arg list is not a
8563 void_type_node 2) an unprototyped function declaration (not a
8564 definition). This just means that we have no info about the
8565 parameters at all. */
8566 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8567 if (fn_arg_types != NULL)
8569 /* this is the prototyped case, check for ... */
8570 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8571 gen_unspecified_parameters_die (decl, subr_die);
8573 else if (DECL_INITIAL (decl) == NULL_TREE)
8574 gen_unspecified_parameters_die (decl, subr_die);
8577 /* Output Dwarf info for all of the stuff within the body of the function
8578 (if it has one - it may be just a declaration). */
8579 outer_scope = DECL_INITIAL (decl);
8581 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8582 node created to represent a function. This outermost BLOCK actually
8583 represents the outermost binding contour for the function, i.e. the
8584 contour in which the function's formal parameters and labels get
8585 declared. Curiously, it appears that the front end doesn't actually
8586 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8587 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8588 list for the function instead.) The BLOCK_VARS list for the
8589 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8590 the function however, and we output DWARF info for those in
8591 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8592 node representing the function's outermost pair of curly braces, and
8593 any blocks used for the base and member initializers of a C++
8594 constructor function. */
8595 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8597 current_function_has_inlines = 0;
8598 decls_for_scope (outer_scope, subr_die, 0);
8600 #if 0 && defined (MIPS_DEBUGGING_INFO)
8601 if (current_function_has_inlines)
8603 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8604 if (! comp_unit_has_inlines)
8606 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8607 comp_unit_has_inlines = 1;
8616 /* Generate a DIE to represent a declared data object. */
8619 gen_variable_die (decl, context_die)
8621 register dw_die_ref context_die;
8623 register tree origin = decl_ultimate_origin (decl);
8624 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8626 dw_die_ref old_die = lookup_decl_die (decl);
8628 = (DECL_EXTERNAL (decl)
8629 || current_function_decl != decl_function_context (decl)
8630 || context_die->die_tag == DW_TAG_structure_type
8631 || context_die->die_tag == DW_TAG_union_type);
8634 add_abstract_origin_attribute (var_die, origin);
8635 /* Loop unrolling can create multiple blocks that refer to the same
8636 static variable, so we must test for the DW_AT_declaration flag. */
8637 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8638 copy decls and set the DECL_ABSTRACT flag on them instead of
8640 else if (old_die && TREE_STATIC (decl)
8641 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8643 /* ??? This is an instantiation of a C++ class level static. */
8644 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8645 if (DECL_NAME (decl))
8647 register unsigned file_index
8648 = lookup_filename (DECL_SOURCE_FILE (decl));
8650 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8651 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8653 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8654 != (unsigned)DECL_SOURCE_LINE (decl))
8656 add_AT_unsigned (var_die, DW_AT_decl_line,
8657 DECL_SOURCE_LINE (decl));
8662 add_name_and_src_coords_attributes (var_die, decl);
8663 add_type_attribute (var_die, TREE_TYPE (decl),
8664 TREE_READONLY (decl),
8665 TREE_THIS_VOLATILE (decl), context_die);
8667 if (TREE_PUBLIC (decl))
8668 add_AT_flag (var_die, DW_AT_external, 1);
8670 if (DECL_ARTIFICIAL (decl))
8671 add_AT_flag (var_die, DW_AT_artificial, 1);
8673 if (TREE_PROTECTED (decl))
8674 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8676 else if (TREE_PRIVATE (decl))
8677 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8681 add_AT_flag (var_die, DW_AT_declaration, 1);
8683 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8684 equate_decl_number_to_die (decl, var_die);
8686 if (! declaration && ! DECL_ABSTRACT (decl))
8688 equate_decl_number_to_die (decl, var_die);
8689 add_location_or_const_value_attribute (var_die, decl);
8690 add_pubname (decl, var_die);
8694 /* Generate a DIE to represent a label identifier. */
8697 gen_label_die (decl, context_die)
8699 register dw_die_ref context_die;
8701 register tree origin = decl_ultimate_origin (decl);
8702 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8704 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8705 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8708 add_abstract_origin_attribute (lbl_die, origin);
8710 add_name_and_src_coords_attributes (lbl_die, decl);
8712 if (DECL_ABSTRACT (decl))
8713 equate_decl_number_to_die (decl, lbl_die);
8716 insn = DECL_RTL (decl);
8718 /* Deleted labels are programmer specified labels which have been
8719 eliminated because of various optimisations. We still emit them
8720 here so that it is possible to put breakpoints on them. */
8721 if (GET_CODE (insn) == CODE_LABEL
8722 || ((GET_CODE (insn) == NOTE
8723 && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)))
8725 /* When optimization is enabled (via -O) some parts of the compiler
8726 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8727 represent source-level labels which were explicitly declared by
8728 the user. This really shouldn't be happening though, so catch
8729 it if it ever does happen. */
8730 if (INSN_DELETED_P (insn))
8733 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8734 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8735 (unsigned) INSN_UID (insn));
8736 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8741 /* Generate a DIE for a lexical block. */
8744 gen_lexical_block_die (stmt, context_die, depth)
8746 register dw_die_ref context_die;
8749 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8750 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8752 if (! BLOCK_ABSTRACT (stmt))
8754 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8756 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8757 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8758 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8761 push_decl_scope (stmt);
8762 decls_for_scope (stmt, stmt_die, depth);
8766 /* Generate a DIE for an inlined subprogram. */
8769 gen_inlined_subroutine_die (stmt, context_die, depth)
8771 register dw_die_ref context_die;
8774 if (! BLOCK_ABSTRACT (stmt))
8776 register dw_die_ref subr_die
8777 = new_die (DW_TAG_inlined_subroutine, context_die);
8778 register tree decl = block_ultimate_origin (stmt);
8779 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8781 add_abstract_origin_attribute (subr_die, decl);
8782 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8784 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8785 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8786 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8787 push_decl_scope (decl);
8788 decls_for_scope (stmt, subr_die, depth);
8790 current_function_has_inlines = 1;
8794 /* Generate a DIE for a field in a record, or structure. */
8797 gen_field_die (decl, context_die)
8799 register dw_die_ref context_die;
8801 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8803 add_name_and_src_coords_attributes (decl_die, decl);
8804 add_type_attribute (decl_die, member_declared_type (decl),
8805 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8808 /* If this is a bit field... */
8809 if (DECL_BIT_FIELD_TYPE (decl))
8811 add_byte_size_attribute (decl_die, decl);
8812 add_bit_size_attribute (decl_die, decl);
8813 add_bit_offset_attribute (decl_die, decl);
8816 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8817 add_data_member_location_attribute (decl_die, decl);
8819 if (DECL_ARTIFICIAL (decl))
8820 add_AT_flag (decl_die, DW_AT_artificial, 1);
8822 if (TREE_PROTECTED (decl))
8823 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8825 else if (TREE_PRIVATE (decl))
8826 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8830 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8831 Use modified_type_die instead.
8832 We keep this code here just in case these types of DIEs may be needed to
8833 represent certain things in other languages (e.g. Pascal) someday. */
8835 gen_pointer_type_die (type, context_die)
8837 register dw_die_ref context_die;
8839 register dw_die_ref ptr_die
8840 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8842 equate_type_number_to_die (type, ptr_die);
8843 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8844 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8847 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8848 Use modified_type_die instead.
8849 We keep this code here just in case these types of DIEs may be needed to
8850 represent certain things in other languages (e.g. Pascal) someday. */
8852 gen_reference_type_die (type, context_die)
8854 register dw_die_ref context_die;
8856 register dw_die_ref ref_die
8857 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8859 equate_type_number_to_die (type, ref_die);
8860 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8861 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8865 /* Generate a DIE for a pointer to a member type. */
8867 gen_ptr_to_mbr_type_die (type, context_die)
8869 register dw_die_ref context_die;
8871 register dw_die_ref ptr_die
8872 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8874 equate_type_number_to_die (type, ptr_die);
8875 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8876 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8877 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8880 /* Generate the DIE for the compilation unit. */
8883 gen_compile_unit_die (main_input_filename)
8884 register char *main_input_filename;
8887 char *wd = getpwd ();
8889 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8890 add_name_attribute (comp_unit_die, main_input_filename);
8893 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8895 sprintf (producer, "%s %s", language_string, version_string);
8897 #ifdef MIPS_DEBUGGING_INFO
8898 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8899 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8900 not appear in the producer string, the debugger reaches the conclusion
8901 that the object file is stripped and has no debugging information.
8902 To get the MIPS/SGI debugger to believe that there is debugging
8903 information in the object file, we add a -g to the producer string. */
8904 if (debug_info_level > DINFO_LEVEL_TERSE)
8905 strcat (producer, " -g");
8908 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8910 if (strcmp (language_string, "GNU C++") == 0)
8911 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8913 else if (strcmp (language_string, "GNU Ada") == 0)
8914 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8916 else if (strcmp (language_string, "GNU F77") == 0)
8917 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8919 else if (strcmp (language_string, "GNU Pascal") == 0)
8920 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8922 else if (flag_traditional)
8923 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8926 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8928 #if 0 /* unimplemented */
8929 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8930 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8934 /* Generate a DIE for a string type. */
8937 gen_string_type_die (type, context_die)
8939 register dw_die_ref context_die;
8941 register dw_die_ref type_die
8942 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8944 equate_type_number_to_die (type, type_die);
8946 /* Fudge the string length attribute for now. */
8948 /* TODO: add string length info.
8949 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8950 bound_representation (upper_bound, 0, 'u'); */
8953 /* Generate the DIE for a base class. */
8956 gen_inheritance_die (binfo, context_die)
8957 register tree binfo;
8958 register dw_die_ref context_die;
8960 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8962 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8963 add_data_member_location_attribute (die, binfo);
8965 if (TREE_VIA_VIRTUAL (binfo))
8966 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
8967 if (TREE_VIA_PUBLIC (binfo))
8968 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
8969 else if (TREE_VIA_PROTECTED (binfo))
8970 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
8973 /* Generate a DIE for a class member. */
8976 gen_member_die (type, context_die)
8978 register dw_die_ref context_die;
8980 register tree member;
8982 /* If this is not an incomplete type, output descriptions of each of its
8983 members. Note that as we output the DIEs necessary to represent the
8984 members of this record or union type, we will also be trying to output
8985 DIEs to represent the *types* of those members. However the `type'
8986 function (above) will specifically avoid generating type DIEs for member
8987 types *within* the list of member DIEs for this (containing) type execpt
8988 for those types (of members) which are explicitly marked as also being
8989 members of this (containing) type themselves. The g++ front- end can
8990 force any given type to be treated as a member of some other
8991 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8992 to point to the TREE node representing the appropriate (containing)
8995 /* First output info about the base classes. */
8996 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
8998 register tree bases = TYPE_BINFO_BASETYPES (type);
8999 register int n_bases = TREE_VEC_LENGTH (bases);
9002 for (i = 0; i < n_bases; i++)
9003 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
9006 /* Now output info about the data members and type members. */
9007 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
9008 gen_decl_die (member, context_die);
9010 /* Now output info about the function members (if any). */
9011 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
9012 gen_decl_die (member, context_die);
9015 /* Generate a DIE for a structure or union type. */
9018 gen_struct_or_union_type_die (type, context_die)
9020 register dw_die_ref context_die;
9022 register dw_die_ref type_die = lookup_type_die (type);
9023 register dw_die_ref scope_die = 0;
9024 register int nested = 0;
9026 if (type_die && ! TYPE_SIZE (type))
9029 if (TYPE_CONTEXT (type) != NULL_TREE
9030 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)))
9033 scope_die = scope_die_for (type, context_die);
9035 if (! type_die || (nested && scope_die == comp_unit_die))
9036 /* First occurrence of type or toplevel definition of nested class. */
9038 register dw_die_ref old_die = type_die;
9040 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
9041 ? DW_TAG_structure_type : DW_TAG_union_type,
9043 equate_type_number_to_die (type, type_die);
9044 add_name_attribute (type_die, type_tag (type));
9046 add_AT_die_ref (type_die, DW_AT_specification, old_die);
9049 remove_AT (type_die, DW_AT_declaration);
9051 /* If we're not in the right context to be defining this type, defer to
9052 avoid tricky recursion. */
9053 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
9055 add_AT_flag (type_die, DW_AT_declaration, 1);
9058 /* If this type has been completed, then give it a byte_size attribute and
9059 then give a list of members. */
9060 else if (TYPE_SIZE (type))
9062 /* Prevent infinite recursion in cases where the type of some member of
9063 this type is expressed in terms of this type itself. */
9064 TREE_ASM_WRITTEN (type) = 1;
9065 add_byte_size_attribute (type_die, type);
9066 if (TYPE_STUB_DECL (type) != NULL_TREE)
9067 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
9069 /* If the first reference to this type was as the return type of an
9070 inline function, then it may not have a parent. Fix this now. */
9071 if (type_die->die_parent == NULL)
9072 add_child_die (scope_die, type_die);
9074 push_decl_scope (type);
9075 gen_member_die (type, type_die);
9078 /* GNU extension: Record what type our vtable lives in. */
9079 if (TYPE_VFIELD (type))
9081 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
9083 gen_type_die (vtype, context_die);
9084 add_AT_die_ref (type_die, DW_AT_containing_type,
9085 lookup_type_die (vtype));
9090 add_AT_flag (type_die, DW_AT_declaration, 1);
9092 /* We can't do this for function-local types, and we don't need to. */
9093 if (TREE_PERMANENT (type))
9094 add_incomplete_type (type);
9098 /* Generate a DIE for a subroutine _type_. */
9101 gen_subroutine_type_die (type, context_die)
9103 register dw_die_ref context_die;
9105 register tree return_type = TREE_TYPE (type);
9106 register dw_die_ref subr_die
9107 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
9109 equate_type_number_to_die (type, subr_die);
9110 add_prototyped_attribute (subr_die, type);
9111 add_type_attribute (subr_die, return_type, 0, 0, context_die);
9112 gen_formal_types_die (type, subr_die);
9115 /* Generate a DIE for a type definition */
9118 gen_typedef_die (decl, context_die)
9120 register dw_die_ref context_die;
9122 register dw_die_ref type_die;
9123 register tree origin;
9125 if (TREE_ASM_WRITTEN (decl))
9127 TREE_ASM_WRITTEN (decl) = 1;
9129 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
9130 origin = decl_ultimate_origin (decl);
9132 add_abstract_origin_attribute (type_die, origin);
9136 add_name_and_src_coords_attributes (type_die, decl);
9137 if (DECL_ORIGINAL_TYPE (decl))
9139 type = DECL_ORIGINAL_TYPE (decl);
9140 equate_type_number_to_die (TREE_TYPE (decl), type_die);
9143 type = TREE_TYPE (decl);
9144 add_type_attribute (type_die, type, TREE_READONLY (decl),
9145 TREE_THIS_VOLATILE (decl), context_die);
9148 if (DECL_ABSTRACT (decl))
9149 equate_decl_number_to_die (decl, type_die);
9152 /* Generate a type description DIE. */
9155 gen_type_die (type, context_die)
9157 register dw_die_ref context_die;
9159 if (type == NULL_TREE || type == error_mark_node)
9162 /* We are going to output a DIE to represent the unqualified version of
9163 this type (i.e. without any const or volatile qualifiers) so get the
9164 main variant (i.e. the unqualified version) of this type now. */
9165 type = type_main_variant (type);
9167 if (TREE_ASM_WRITTEN (type))
9170 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9171 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
9173 TREE_ASM_WRITTEN (type) = 1;
9174 gen_decl_die (TYPE_NAME (type), context_die);
9178 switch (TREE_CODE (type))
9184 case REFERENCE_TYPE:
9185 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
9186 ensures that the gen_type_die recursion will terminate even if the
9187 type is recursive. Recursive types are possible in Ada. */
9188 /* ??? We could perhaps do this for all types before the switch
9190 TREE_ASM_WRITTEN (type) = 1;
9192 /* For these types, all that is required is that we output a DIE (or a
9193 set of DIEs) to represent the "basis" type. */
9194 gen_type_die (TREE_TYPE (type), context_die);
9198 /* This code is used for C++ pointer-to-data-member types.
9199 Output a description of the relevant class type. */
9200 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
9202 /* Output a description of the type of the object pointed to. */
9203 gen_type_die (TREE_TYPE (type), context_die);
9205 /* Now output a DIE to represent this pointer-to-data-member type
9207 gen_ptr_to_mbr_type_die (type, context_die);
9211 gen_type_die (TYPE_DOMAIN (type), context_die);
9212 gen_set_type_die (type, context_die);
9216 gen_type_die (TREE_TYPE (type), context_die);
9217 abort (); /* No way to represent these in Dwarf yet! */
9221 /* Force out return type (in case it wasn't forced out already). */
9222 gen_type_die (TREE_TYPE (type), context_die);
9223 gen_subroutine_type_die (type, context_die);
9227 /* Force out return type (in case it wasn't forced out already). */
9228 gen_type_die (TREE_TYPE (type), context_die);
9229 gen_subroutine_type_die (type, context_die);
9233 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9235 gen_type_die (TREE_TYPE (type), context_die);
9236 gen_string_type_die (type, context_die);
9239 gen_array_type_die (type, context_die);
9245 case QUAL_UNION_TYPE:
9246 /* If this is a nested type whose containing class hasn't been
9247 written out yet, writing it out will cover this one, too. */
9248 if (TYPE_CONTEXT (type)
9249 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9250 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9252 gen_type_die (TYPE_CONTEXT (type), context_die);
9254 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9257 /* If that failed, attach ourselves to the stub. */
9258 push_decl_scope (TYPE_CONTEXT (type));
9259 context_die = lookup_type_die (TYPE_CONTEXT (type));
9262 if (TREE_CODE (type) == ENUMERAL_TYPE)
9263 gen_enumeration_type_die (type, context_die);
9265 gen_struct_or_union_type_die (type, context_die);
9267 if (TYPE_CONTEXT (type)
9268 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9269 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9272 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9273 it up if it is ever completed. gen_*_type_die will set it for us
9274 when appropriate. */
9283 /* No DIEs needed for fundamental types. */
9287 /* No Dwarf representation currently defined. */
9294 TREE_ASM_WRITTEN (type) = 1;
9297 /* Generate a DIE for a tagged type instantiation. */
9300 gen_tagged_type_instantiation_die (type, context_die)
9302 register dw_die_ref context_die;
9304 if (type == NULL_TREE || type == error_mark_node)
9307 /* We are going to output a DIE to represent the unqualified version of
9308 this type (i.e. without any const or volatile qualifiers) so make sure
9309 that we have the main variant (i.e. the unqualified version) of this
9311 if (type != type_main_variant (type)
9312 || !TREE_ASM_WRITTEN (type))
9315 switch (TREE_CODE (type))
9321 gen_inlined_enumeration_type_die (type, context_die);
9325 gen_inlined_structure_type_die (type, context_die);
9329 case QUAL_UNION_TYPE:
9330 gen_inlined_union_type_die (type, context_die);
9338 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9339 things which are local to the given block. */
9342 gen_block_die (stmt, context_die, depth)
9344 register dw_die_ref context_die;
9347 register int must_output_die = 0;
9348 register tree origin;
9350 register enum tree_code origin_code;
9352 /* Ignore blocks never really used to make RTL. */
9354 if (stmt == NULL_TREE || !TREE_USED (stmt))
9357 /* Determine the "ultimate origin" of this block. This block may be an
9358 inlined instance of an inlined instance of inline function, so we have
9359 to trace all of the way back through the origin chain to find out what
9360 sort of node actually served as the original seed for the creation of
9361 the current block. */
9362 origin = block_ultimate_origin (stmt);
9363 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9365 /* Determine if we need to output any Dwarf DIEs at all to represent this
9367 if (origin_code == FUNCTION_DECL)
9368 /* The outer scopes for inlinings *must* always be represented. We
9369 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9370 must_output_die = 1;
9373 /* In the case where the current block represents an inlining of the
9374 "body block" of an inline function, we must *NOT* output any DIE for
9375 this block because we have already output a DIE to represent the
9376 whole inlined function scope and the "body block" of any function
9377 doesn't really represent a different scope according to ANSI C
9378 rules. So we check here to make sure that this block does not
9379 represent a "body block inlining" before trying to set the
9380 `must_output_die' flag. */
9381 if (! is_body_block (origin ? origin : stmt))
9383 /* Determine if this block directly contains any "significant"
9384 local declarations which we will need to output DIEs for. */
9385 if (debug_info_level > DINFO_LEVEL_TERSE)
9386 /* We are not in terse mode so *any* local declaration counts
9387 as being a "significant" one. */
9388 must_output_die = (BLOCK_VARS (stmt) != NULL);
9390 /* We are in terse mode, so only local (nested) function
9391 definitions count as "significant" local declarations. */
9392 for (decl = BLOCK_VARS (stmt);
9393 decl != NULL; decl = TREE_CHAIN (decl))
9394 if (TREE_CODE (decl) == FUNCTION_DECL
9395 && DECL_INITIAL (decl))
9397 must_output_die = 1;
9403 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9404 DIE for any block which contains no significant local declarations at
9405 all. Rather, in such cases we just call `decls_for_scope' so that any
9406 needed Dwarf info for any sub-blocks will get properly generated. Note
9407 that in terse mode, our definition of what constitutes a "significant"
9408 local declaration gets restricted to include only inlined function
9409 instances and local (nested) function definitions. */
9410 if (must_output_die)
9412 if (origin_code == FUNCTION_DECL)
9413 gen_inlined_subroutine_die (stmt, context_die, depth);
9415 gen_lexical_block_die (stmt, context_die, depth);
9418 decls_for_scope (stmt, context_die, depth);
9421 /* Generate all of the decls declared within a given scope and (recursively)
9422 all of its sub-blocks. */
9425 decls_for_scope (stmt, context_die, depth)
9427 register dw_die_ref context_die;
9431 register tree subblocks;
9433 /* Ignore blocks never really used to make RTL. */
9434 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9437 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9438 next_block_number++;
9440 /* Output the DIEs to represent all of the data objects and typedefs
9441 declared directly within this block but not within any nested
9442 sub-blocks. Also, nested function and tag DIEs have been
9443 generated with a parent of NULL; fix that up now. */
9444 for (decl = BLOCK_VARS (stmt);
9445 decl != NULL; decl = TREE_CHAIN (decl))
9447 register dw_die_ref die;
9449 if (TREE_CODE (decl) == FUNCTION_DECL)
9450 die = lookup_decl_die (decl);
9451 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9452 die = lookup_type_die (TREE_TYPE (decl));
9456 if (die != NULL && die->die_parent == NULL)
9457 add_child_die (context_die, die);
9459 gen_decl_die (decl, context_die);
9462 /* Output the DIEs to represent all sub-blocks (and the items declared
9463 therein) of this block. */
9464 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9466 subblocks = BLOCK_CHAIN (subblocks))
9467 gen_block_die (subblocks, context_die, depth + 1);
9470 /* Is this a typedef we can avoid emitting? */
9473 is_redundant_typedef (decl)
9476 if (TYPE_DECL_IS_STUB (decl))
9479 if (DECL_ARTIFICIAL (decl)
9480 && DECL_CONTEXT (decl)
9481 && is_tagged_type (DECL_CONTEXT (decl))
9482 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9483 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9484 /* Also ignore the artificial member typedef for the class name. */
9490 /* Generate Dwarf debug information for a decl described by DECL. */
9493 gen_decl_die (decl, context_die)
9495 register dw_die_ref context_die;
9497 register tree origin;
9499 /* Make a note of the decl node we are going to be working on. We may need
9500 to give the user the source coordinates of where it appeared in case we
9501 notice (later on) that something about it looks screwy. */
9502 dwarf_last_decl = decl;
9504 if (TREE_CODE (decl) == ERROR_MARK)
9507 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9508 ignore a function definition, since that would screw up our count of
9509 blocks, and that in turn will completely screw up the labels we will
9510 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9511 subsequent blocks). */
9512 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9515 switch (TREE_CODE (decl))
9518 /* The individual enumerators of an enum type get output when we output
9519 the Dwarf representation of the relevant enum type itself. */
9523 /* Don't output any DIEs to represent mere function declarations,
9524 unless they are class members or explicit block externs. */
9525 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9526 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9529 if (debug_info_level > DINFO_LEVEL_TERSE)
9531 /* Before we describe the FUNCTION_DECL itself, make sure that we
9532 have described its return type. */
9533 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9535 /* And its containing type. */
9536 origin = decl_class_context (decl);
9537 if (origin != NULL_TREE)
9538 gen_type_die (origin, context_die);
9540 /* And its virtual context. */
9541 if (DECL_VINDEX (decl) != NULL_TREE)
9542 gen_type_die (DECL_CONTEXT (decl), context_die);
9545 /* Now output a DIE to represent the function itself. */
9546 gen_subprogram_die (decl, context_die);
9550 /* If we are in terse mode, don't generate any DIEs to represent any
9552 if (debug_info_level <= DINFO_LEVEL_TERSE)
9555 /* In the special case of a TYPE_DECL node representing the
9556 declaration of some type tag, if the given TYPE_DECL is marked as
9557 having been instantiated from some other (original) TYPE_DECL node
9558 (e.g. one which was generated within the original definition of an
9559 inline function) we have to generate a special (abbreviated)
9560 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9562 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9564 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9568 if (is_redundant_typedef (decl))
9569 gen_type_die (TREE_TYPE (decl), context_die);
9571 /* Output a DIE to represent the typedef itself. */
9572 gen_typedef_die (decl, context_die);
9576 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9577 gen_label_die (decl, context_die);
9581 /* If we are in terse mode, don't generate any DIEs to represent any
9582 variable declarations or definitions. */
9583 if (debug_info_level <= DINFO_LEVEL_TERSE)
9586 /* Output any DIEs that are needed to specify the type of this data
9588 gen_type_die (TREE_TYPE (decl), context_die);
9590 /* And its containing type. */
9591 origin = decl_class_context (decl);
9592 if (origin != NULL_TREE)
9593 gen_type_die (origin, context_die);
9595 /* Now output the DIE to represent the data object itself. This gets
9596 complicated because of the possibility that the VAR_DECL really
9597 represents an inlined instance of a formal parameter for an inline
9599 origin = decl_ultimate_origin (decl);
9600 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9601 gen_formal_parameter_die (decl, context_die);
9603 gen_variable_die (decl, context_die);
9607 /* Ignore the nameless fields that are used to skip bits, but
9608 handle C++ anonymous unions. */
9609 if (DECL_NAME (decl) != NULL_TREE
9610 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9612 gen_type_die (member_declared_type (decl), context_die);
9613 gen_field_die (decl, context_die);
9618 gen_type_die (TREE_TYPE (decl), context_die);
9619 gen_formal_parameter_die (decl, context_die);
9627 /* Write the debugging output for DECL. */
9630 dwarf2out_decl (decl)
9633 register dw_die_ref context_die = comp_unit_die;
9635 if (TREE_CODE (decl) == ERROR_MARK)
9638 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9639 hope that the node in question doesn't represent a function definition.
9640 If it does, then totally ignoring it is bound to screw up our count of
9641 blocks, and that in turn will completely screw up the labels we will
9642 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9643 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9644 own sequence numbers with them!) */
9645 if (DECL_IGNORED_P (decl))
9647 if (TREE_CODE (decl) == FUNCTION_DECL
9648 && DECL_INITIAL (decl) != NULL)
9654 switch (TREE_CODE (decl))
9657 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9658 builtin function. Explicit programmer-supplied declarations of
9659 these same functions should NOT be ignored however. */
9660 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9663 /* What we would really like to do here is to filter out all mere
9664 file-scope declarations of file-scope functions which are never
9665 referenced later within this translation unit (and keep all of ones
9666 that *are* referenced later on) but we aren't clairvoyant, so we have
9667 no idea which functions will be referenced in the future (i.e. later
9668 on within the current translation unit). So here we just ignore all
9669 file-scope function declarations which are not also definitions. If
9670 and when the debugger needs to know something about these functions,
9671 it wil have to hunt around and find the DWARF information associated
9672 with the definition of the function. Note that we can't just check
9673 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9674 definitions and which ones represent mere declarations. We have to
9675 check `DECL_INITIAL' instead. That's because the C front-end
9676 supports some weird semantics for "extern inline" function
9677 definitions. These can get inlined within the current translation
9678 unit (an thus, we need to generate DWARF info for their abstract
9679 instances so that the DWARF info for the concrete inlined instances
9680 can have something to refer to) but the compiler never generates any
9681 out-of-lines instances of such things (despite the fact that they
9682 *are* definitions). The important point is that the C front-end
9683 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9684 to generate DWARF for them anyway. Note that the C++ front-end also
9685 plays some similar games for inline function definitions appearing
9686 within include files which also contain
9687 `#pragma interface' pragmas. */
9688 if (DECL_INITIAL (decl) == NULL_TREE)
9691 /* If we're a nested function, initially use a parent of NULL; if we're
9692 a plain function, this will be fixed up in decls_for_scope. If
9693 we're a method, it will be ignored, since we already have a DIE. */
9694 if (decl_function_context (decl))
9700 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9701 declaration and if the declaration was never even referenced from
9702 within this entire compilation unit. We suppress these DIEs in
9703 order to save space in the .debug section (by eliminating entries
9704 which are probably useless). Note that we must not suppress
9705 block-local extern declarations (whether used or not) because that
9706 would screw-up the debugger's name lookup mechanism and cause it to
9707 miss things which really ought to be in scope at a given point. */
9708 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9711 /* If we are in terse mode, don't generate any DIEs to represent any
9712 variable declarations or definitions. */
9713 if (debug_info_level <= DINFO_LEVEL_TERSE)
9718 /* Don't bother trying to generate any DIEs to represent any of the
9719 normal built-in types for the language we are compiling. */
9720 if (DECL_SOURCE_LINE (decl) == 0)
9722 /* OK, we need to generate one for `bool' so GDB knows what type
9723 comparisons have. */
9724 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9725 == DW_LANG_C_plus_plus)
9726 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9727 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9732 /* If we are in terse mode, don't generate any DIEs for types. */
9733 if (debug_info_level <= DINFO_LEVEL_TERSE)
9736 /* If we're a function-scope tag, initially use a parent of NULL;
9737 this will be fixed up in decls_for_scope. */
9738 if (decl_function_context (decl))
9747 gen_decl_die (decl, context_die);
9748 output_pending_types_for_scope (comp_unit_die);
9751 /* Output a marker (i.e. a label) for the beginning of the generated code for
9755 dwarf2out_begin_block (blocknum)
9756 register unsigned blocknum;
9758 function_section (current_function_decl);
9759 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9762 /* Output a marker (i.e. a label) for the end of the generated code for a
9766 dwarf2out_end_block (blocknum)
9767 register unsigned blocknum;
9769 function_section (current_function_decl);
9770 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9773 /* Output a marker (i.e. a label) at a point in the assembly code which
9774 corresponds to a given source level label. */
9777 dwarf2out_label (insn)
9780 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9782 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9784 function_section (current_function_decl);
9785 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9786 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9787 (unsigned) INSN_UID (insn));
9791 /* Lookup a filename (in the list of filenames that we know about here in
9792 dwarf2out.c) and return its "index". The index of each (known) filename is
9793 just a unique number which is associated with only that one filename.
9794 We need such numbers for the sake of generating labels
9795 (in the .debug_sfnames section) and references to those
9796 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9797 If the filename given as an argument is not found in our current list,
9798 add it to the list and assign it the next available unique index number.
9799 In order to speed up searches, we remember the index of the filename
9800 was looked up last. This handles the majority of all searches. */
9803 lookup_filename (file_name)
9804 const char *file_name;
9806 static unsigned last_file_lookup_index = 0;
9807 register unsigned i;
9809 /* Check to see if the file name that was searched on the previous call
9810 matches this file name. If so, return the index. */
9811 if (last_file_lookup_index != 0)
9812 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9813 return last_file_lookup_index;
9815 /* Didn't match the previous lookup, search the table */
9816 for (i = 1; i < file_table_in_use; ++i)
9817 if (strcmp (file_name, file_table[i]) == 0)
9819 last_file_lookup_index = i;
9823 /* Prepare to add a new table entry by making sure there is enough space in
9824 the table to do so. If not, expand the current table. */
9825 if (file_table_in_use == file_table_allocated)
9827 file_table_allocated += FILE_TABLE_INCREMENT;
9829 = (char **) xrealloc (file_table,
9830 file_table_allocated * sizeof (char *));
9833 /* Add the new entry to the end of the filename table. */
9834 file_table[file_table_in_use] = xstrdup (file_name);
9835 last_file_lookup_index = file_table_in_use++;
9837 return last_file_lookup_index;
9840 /* Output a label to mark the beginning of a source code line entry
9841 and record information relating to this source line, in
9842 'line_info_table' for later output of the .debug_line section. */
9845 dwarf2out_line (filename, line)
9846 register const char *filename;
9847 register unsigned line;
9849 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9851 function_section (current_function_decl);
9853 if (DECL_SECTION_NAME (current_function_decl))
9855 register dw_separate_line_info_ref line_info;
9856 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9857 separate_line_info_table_in_use);
9859 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
9860 fputc ('\n', asm_out_file);
9862 /* expand the line info table if necessary */
9863 if (separate_line_info_table_in_use
9864 == separate_line_info_table_allocated)
9866 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9867 separate_line_info_table
9868 = (dw_separate_line_info_ref)
9869 xrealloc (separate_line_info_table,
9870 separate_line_info_table_allocated
9871 * sizeof (dw_separate_line_info_entry));
9874 /* Add the new entry at the end of the line_info_table. */
9876 = &separate_line_info_table[separate_line_info_table_in_use++];
9877 line_info->dw_file_num = lookup_filename (filename);
9878 line_info->dw_line_num = line;
9879 line_info->function = current_funcdef_number;
9883 register dw_line_info_ref line_info;
9885 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9886 line_info_table_in_use);
9888 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
9889 fputc ('\n', asm_out_file);
9891 /* Expand the line info table if necessary. */
9892 if (line_info_table_in_use == line_info_table_allocated)
9894 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9896 = (dw_line_info_ref)
9897 xrealloc (line_info_table,
9898 (line_info_table_allocated
9899 * sizeof (dw_line_info_entry)));
9902 /* Add the new entry at the end of the line_info_table. */
9903 line_info = &line_info_table[line_info_table_in_use++];
9904 line_info->dw_file_num = lookup_filename (filename);
9905 line_info->dw_line_num = line;
9910 /* Record the beginning of a new source file, for later output
9911 of the .debug_macinfo section. At present, unimplemented. */
9914 dwarf2out_start_source_file (filename)
9915 register const char *filename ATTRIBUTE_UNUSED;
9919 /* Record the end of a source file, for later output
9920 of the .debug_macinfo section. At present, unimplemented. */
9923 dwarf2out_end_source_file ()
9927 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9928 the tail part of the directive line, i.e. the part which is past the
9929 initial whitespace, #, whitespace, directive-name, whitespace part. */
9932 dwarf2out_define (lineno, buffer)
9933 register unsigned lineno ATTRIBUTE_UNUSED;
9934 register const char *buffer ATTRIBUTE_UNUSED;
9936 static int initialized = 0;
9939 dwarf2out_start_source_file (primary_filename);
9944 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9945 the tail part of the directive line, i.e. the part which is past the
9946 initial whitespace, #, whitespace, directive-name, whitespace part. */
9949 dwarf2out_undef (lineno, buffer)
9950 register unsigned lineno ATTRIBUTE_UNUSED;
9951 register const char *buffer ATTRIBUTE_UNUSED;
9955 /* Set up for Dwarf output at the start of compilation. */
9958 dwarf2out_init (asm_out_file, main_input_filename)
9959 register FILE *asm_out_file;
9960 register char *main_input_filename;
9962 /* Remember the name of the primary input file. */
9963 primary_filename = main_input_filename;
9965 /* Allocate the initial hunk of the file_table. */
9966 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
9967 bzero ((char *) file_table, FILE_TABLE_INCREMENT * sizeof (char *));
9968 file_table_allocated = FILE_TABLE_INCREMENT;
9970 /* Skip the first entry - file numbers begin at 1. */
9971 file_table_in_use = 1;
9973 /* Allocate the initial hunk of the decl_die_table. */
9975 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9976 bzero ((char *) decl_die_table,
9977 DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9978 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
9979 decl_die_table_in_use = 0;
9981 /* Allocate the initial hunk of the decl_scope_table. */
9983 = (decl_scope_node *) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9984 * sizeof (decl_scope_node));
9985 bzero ((char *) decl_scope_table,
9986 DECL_SCOPE_TABLE_INCREMENT * sizeof (decl_scope_node));
9987 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
9988 decl_scope_depth = 0;
9990 /* Allocate the initial hunk of the abbrev_die_table. */
9992 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9993 * sizeof (dw_die_ref));
9994 bzero ((char *) abbrev_die_table,
9995 ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9996 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
9997 /* Zero-th entry is allocated, but unused */
9998 abbrev_die_table_in_use = 1;
10000 /* Allocate the initial hunk of the line_info_table. */
10002 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
10003 * sizeof (dw_line_info_entry));
10004 bzero ((char *) line_info_table,
10005 LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry));
10006 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
10007 /* Zero-th entry is allocated, but unused */
10008 line_info_table_in_use = 1;
10010 /* Generate the initial DIE for the .debug section. Note that the (string)
10011 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
10012 will (typically) be a relative pathname and that this pathname should be
10013 taken as being relative to the directory from which the compiler was
10014 invoked when the given (base) source file was compiled. */
10015 gen_compile_unit_die (main_input_filename);
10017 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
10018 ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, ABBREV_SECTION_LABEL, 0);
10019 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10020 ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0);
10022 strcpy (text_section_label, stripattributes (TEXT_SECTION));
10023 ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label,
10024 DEBUG_INFO_SECTION_LABEL, 0);
10025 ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label,
10026 DEBUG_LINE_SECTION_LABEL, 0);
10028 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10029 ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
10030 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10031 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10032 ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
10033 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10034 ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
10035 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10036 ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
10039 /* Output stuff that dwarf requires at the end of every file,
10040 and generate the DWARF-2 debugging info. */
10043 dwarf2out_finish ()
10045 limbo_die_node *node, *next_node;
10049 /* Traverse the limbo die list, and add parent/child links. The only
10050 dies without parents that should be here are concrete instances of
10051 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
10052 For concrete instances, we can get the parent die from the abstract
10054 for (node = limbo_die_list; node; node = next_node)
10056 next_node = node->next;
10059 if (die->die_parent == NULL)
10061 a = get_AT (die, DW_AT_abstract_origin);
10063 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
10064 else if (die == comp_unit_die)
10072 /* Walk through the list of incomplete types again, trying once more to
10073 emit full debugging info for them. */
10074 retry_incomplete_types ();
10076 /* Traverse the DIE tree and add sibling attributes to those DIE's
10077 that have children. */
10078 add_sibling_attributes (comp_unit_die);
10080 /* Output a terminator label for the .text section. */
10081 fputc ('\n', asm_out_file);
10082 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10083 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
10086 /* Output a terminator label for the .data section. */
10087 fputc ('\n', asm_out_file);
10088 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
10089 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
10091 /* Output a terminator label for the .bss section. */
10092 fputc ('\n', asm_out_file);
10093 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
10094 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
10097 /* Output the source line correspondence table. */
10098 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
10100 fputc ('\n', asm_out_file);
10101 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10102 output_line_info ();
10104 /* We can only use the low/high_pc attributes if all of the code
10106 if (separate_line_info_table_in_use == 0)
10108 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label);
10109 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
10112 add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list,
10113 debug_line_section_label);
10116 /* Output the abbreviation table. */
10117 fputc ('\n', asm_out_file);
10118 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10119 build_abbrev_table (comp_unit_die);
10120 output_abbrev_section ();
10122 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
10123 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
10124 calc_die_sizes (comp_unit_die);
10126 /* Output debugging information. */
10127 fputc ('\n', asm_out_file);
10128 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10129 output_compilation_unit_header ();
10130 output_die (comp_unit_die);
10132 if (pubname_table_in_use)
10134 /* Output public names table. */
10135 fputc ('\n', asm_out_file);
10136 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
10137 output_pubnames ();
10140 if (fde_table_in_use)
10142 /* Output the address range information. */
10143 fputc ('\n', asm_out_file);
10144 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
10148 #endif /* DWARF2_DEBUGGING_INFO */