1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 93, 95, 96, 97, 1998 Free Software Foundation, Inc.
3 Contributed by Gary Funck (gary@intrepid.com).
4 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
5 Extensively modified by Jason Merrill (jason@cygnus.com).
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* The first part of this file deals with the DWARF 2 frame unwind
24 information, which is also used by the GCC efficient exception handling
25 mechanism. The second part, controlled only by an #ifdef
26 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
35 #include "hard-reg-set.h"
37 #include "insn-config.h"
43 #include "dwarf2out.h"
45 #include "dyn-string.h"
47 /* We cannot use <assert.h> in GCC source, since that would include
48 GCC's assert.h, which may not be compatible with the host compiler. */
53 # define assert(e) do { if (! (e)) abort (); } while (0)
56 /* Decide whether we want to emit frame unwind information for the current
62 return (write_symbols == DWARF2_DEBUG
63 #ifdef DWARF2_FRAME_INFO
66 #ifdef DWARF2_UNWIND_INFO
67 || (flag_exceptions && ! exceptions_via_longjmp)
72 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
78 /* How to start an assembler comment. */
79 #ifndef ASM_COMMENT_START
80 #define ASM_COMMENT_START ";#"
83 typedef struct dw_cfi_struct *dw_cfi_ref;
84 typedef struct dw_fde_struct *dw_fde_ref;
85 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
87 /* Call frames are described using a sequence of Call Frame
88 Information instructions. The register number, offset
89 and address fields are provided as possible operands;
90 their use is selected by the opcode field. */
92 typedef union dw_cfi_oprnd_struct
94 unsigned long dw_cfi_reg_num;
95 long int dw_cfi_offset;
100 typedef struct dw_cfi_struct
102 dw_cfi_ref dw_cfi_next;
103 enum dwarf_call_frame_info dw_cfi_opc;
104 dw_cfi_oprnd dw_cfi_oprnd1;
105 dw_cfi_oprnd dw_cfi_oprnd2;
109 /* All call frame descriptions (FDE's) in the GCC generated DWARF
110 refer to a single Common Information Entry (CIE), defined at
111 the beginning of the .debug_frame section. This used of a single
112 CIE obviates the need to keep track of multiple CIE's
113 in the DWARF generation routines below. */
115 typedef struct dw_fde_struct
118 char *dw_fde_current_label;
120 dw_cfi_ref dw_fde_cfi;
124 /* Maximum size (in bytes) of an artificially generated label. */
125 #define MAX_ARTIFICIAL_LABEL_BYTES 30
127 /* Make sure we know the sizes of the various types dwarf can describe. These
128 are only defaults. If the sizes are different for your target, you should
129 override these values by defining the appropriate symbols in your tm.h
132 #ifndef CHAR_TYPE_SIZE
133 #define CHAR_TYPE_SIZE BITS_PER_UNIT
136 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
139 /* The size in bytes of a DWARF field indicating an offset or length
140 relative to a debug info section, specified to be 4 bytes in the DWARF-2
141 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
143 #ifndef DWARF_OFFSET_SIZE
144 #define DWARF_OFFSET_SIZE 4
147 #define DWARF_VERSION 2
149 /* Round SIZE up to the nearest BOUNDARY. */
150 #define DWARF_ROUND(SIZE,BOUNDARY) \
151 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
153 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
154 #ifdef STACK_GROWS_DOWNWARD
155 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
157 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
160 /* A pointer to the base of a table that contains frame description
161 information for each routine. */
162 static dw_fde_ref fde_table;
164 /* Number of elements currently allocated for fde_table. */
165 static unsigned fde_table_allocated;
167 /* Number of elements in fde_table currently in use. */
168 static unsigned fde_table_in_use;
170 /* Size (in elements) of increments by which we may expand the
172 #define FDE_TABLE_INCREMENT 256
174 /* A list of call frame insns for the CIE. */
175 static dw_cfi_ref cie_cfi_head;
177 /* The number of the current function definition for which debugging
178 information is being generated. These numbers range from 1 up to the
179 maximum number of function definitions contained within the current
180 compilation unit. These numbers are used to create unique label id's
181 unique to each function definition. */
182 static unsigned current_funcdef_number = 0;
184 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
185 attribute that accelerates the lookup of the FDE associated
186 with the subprogram. This variable holds the table index of the FDE
187 associated with the current function (body) definition. */
188 static unsigned current_funcdef_fde;
190 /* Forward declarations for functions defined in this file. */
192 static char *stripattributes PROTO((char *));
193 static char *dwarf_cfi_name PROTO((unsigned));
194 static dw_cfi_ref new_cfi PROTO((void));
195 static void add_cfi PROTO((dw_cfi_ref *, dw_cfi_ref));
196 static unsigned long size_of_uleb128 PROTO((unsigned long));
197 static unsigned long size_of_sleb128 PROTO((long));
198 static void output_uleb128 PROTO((unsigned long));
199 static void output_sleb128 PROTO((long));
200 static void add_fde_cfi PROTO((char *, dw_cfi_ref));
201 static void lookup_cfa_1 PROTO((dw_cfi_ref, unsigned long *,
203 static void lookup_cfa PROTO((unsigned long *, long *));
204 static void reg_save PROTO((char *, unsigned, unsigned,
206 static void initial_return_save PROTO((rtx));
207 static void output_cfi PROTO((dw_cfi_ref, dw_fde_ref));
208 static void output_call_frame_info PROTO((int));
209 static unsigned reg_number PROTO((rtx));
210 static void dwarf2out_stack_adjust PROTO((rtx));
212 /* Definitions of defaults for assembler-dependent names of various
213 pseudo-ops and section names.
214 Theses may be overridden in the tm.h file (if necessary) for a particular
217 #ifdef OBJECT_FORMAT_ELF
218 #ifndef UNALIGNED_SHORT_ASM_OP
219 #define UNALIGNED_SHORT_ASM_OP ".2byte"
221 #ifndef UNALIGNED_INT_ASM_OP
222 #define UNALIGNED_INT_ASM_OP ".4byte"
224 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
225 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
227 #endif /* OBJECT_FORMAT_ELF */
230 #define ASM_BYTE_OP ".byte"
233 /* Data and reference forms for relocatable data. */
234 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
235 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
237 /* Pseudo-op for defining a new section. */
238 #ifndef SECTION_ASM_OP
239 #define SECTION_ASM_OP ".section"
242 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
243 print the SECTION_ASM_OP and the section name. The default here works for
244 almost all svr4 assemblers, except for the sparc, where the section name
245 must be enclosed in double quotes. (See sparcv4.h). */
246 #ifndef SECTION_FORMAT
247 #ifdef PUSHSECTION_FORMAT
248 #define SECTION_FORMAT PUSHSECTION_FORMAT
250 #define SECTION_FORMAT "\t%s\t%s\n"
254 #ifndef FRAME_SECTION
255 #define FRAME_SECTION ".debug_frame"
258 #ifndef FUNC_BEGIN_LABEL
259 #define FUNC_BEGIN_LABEL "LFB"
261 #ifndef FUNC_END_LABEL
262 #define FUNC_END_LABEL "LFE"
264 #define CIE_AFTER_SIZE_LABEL "LSCIE"
265 #define CIE_END_LABEL "LECIE"
266 #define CIE_LENGTH_LABEL "LLCIE"
267 #define FDE_AFTER_SIZE_LABEL "LSFDE"
268 #define FDE_END_LABEL "LEFDE"
269 #define FDE_LENGTH_LABEL "LLFDE"
271 /* Definitions of defaults for various types of primitive assembly language
272 output operations. These may be overridden from within the tm.h file,
273 but typically, that is unnecessary. */
275 #ifndef ASM_OUTPUT_SECTION
276 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
277 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
280 #ifndef ASM_OUTPUT_DWARF_DATA1
281 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
282 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
285 #ifndef ASM_OUTPUT_DWARF_DELTA1
286 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
287 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
288 assemble_name (FILE, LABEL1); \
289 fprintf (FILE, "-"); \
290 assemble_name (FILE, LABEL2); \
294 #ifdef UNALIGNED_INT_ASM_OP
296 #ifndef UNALIGNED_OFFSET_ASM_OP
297 #define UNALIGNED_OFFSET_ASM_OP \
298 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
301 #ifndef UNALIGNED_WORD_ASM_OP
302 #define UNALIGNED_WORD_ASM_OP \
303 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
306 #ifndef ASM_OUTPUT_DWARF_DELTA2
307 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
308 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
309 assemble_name (FILE, LABEL1); \
310 fprintf (FILE, "-"); \
311 assemble_name (FILE, LABEL2); \
315 #ifndef ASM_OUTPUT_DWARF_DELTA4
316 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
317 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
318 assemble_name (FILE, LABEL1); \
319 fprintf (FILE, "-"); \
320 assemble_name (FILE, LABEL2); \
324 #ifndef ASM_OUTPUT_DWARF_DELTA
325 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
326 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
327 assemble_name (FILE, LABEL1); \
328 fprintf (FILE, "-"); \
329 assemble_name (FILE, LABEL2); \
333 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
334 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
335 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
336 assemble_name (FILE, LABEL1); \
337 fprintf (FILE, "-"); \
338 assemble_name (FILE, LABEL2); \
342 #ifndef ASM_OUTPUT_DWARF_ADDR
343 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
344 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
345 assemble_name (FILE, LABEL); \
349 /* ??? This macro takes an RTX in dwarfout.c and a string in dwarf2out.c.
350 We resolve the conflict by creating a new macro ASM_OUTPUT_DWARF2_ADDR_CONST
351 for ports that want to support both DWARF1 and DWARF2. This needs a better
352 solution. See also the comments in sparc/sp64-elf.h. */
353 #ifdef ASM_OUTPUT_DWARF2_ADDR_CONST
354 #undef ASM_OUTPUT_DWARF_ADDR_CONST
355 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
356 ASM_OUTPUT_DWARF2_ADDR_CONST (FILE, ADDR)
359 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
360 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
361 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
364 #ifndef ASM_OUTPUT_DWARF_OFFSET4
365 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
366 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
367 assemble_name (FILE, LABEL); \
371 #ifndef ASM_OUTPUT_DWARF_OFFSET
372 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
373 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
374 assemble_name (FILE, LABEL); \
378 #ifndef ASM_OUTPUT_DWARF_DATA2
379 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
380 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
383 #ifndef ASM_OUTPUT_DWARF_DATA4
384 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
385 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
388 #ifndef ASM_OUTPUT_DWARF_DATA
389 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
390 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
391 (unsigned long) (VALUE))
394 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
395 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
396 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
397 (unsigned long) (VALUE))
400 #ifndef ASM_OUTPUT_DWARF_DATA8
401 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
403 if (WORDS_BIG_ENDIAN) \
405 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
406 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
410 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
411 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
416 #else /* UNALIGNED_INT_ASM_OP */
418 /* We don't have unaligned support, let's hope the normal output works for
421 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
422 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
424 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
425 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
427 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
428 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
430 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
431 assemble_integer (gen_rtx_MINUS (HImode, \
432 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
433 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
436 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
437 assemble_integer (gen_rtx_MINUS (SImode, \
438 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
439 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
442 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
443 assemble_integer (gen_rtx_MINUS (Pmode, \
444 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
445 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
448 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
449 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
451 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
452 assemble_integer (GEN_INT (VALUE), 4, 1)
454 #endif /* UNALIGNED_INT_ASM_OP */
457 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
458 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
460 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
461 assemble_name (FILE, SY); \
463 assemble_name (FILE, HI); \
465 assemble_name (FILE, LO); \
468 #endif /* SET_ASM_OP */
470 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
471 newline is produced. When flag_debug_asm is asserted, we add commentary
472 at the end of the line, so we must avoid output of a newline here. */
473 #ifndef ASM_OUTPUT_DWARF_STRING
474 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
476 register int slen = strlen(P); \
477 register char *p = (P); \
479 fprintf (FILE, "\t.ascii \""); \
480 for (i = 0; i < slen; i++) \
482 register int c = p[i]; \
483 if (c == '\"' || c == '\\') \
485 if (c >= ' ' && c < 0177) \
489 fprintf (FILE, "\\%o", c); \
492 fprintf (FILE, "\\0\""); \
497 /* The DWARF 2 CFA column which tracks the return address. Normally this
498 is the column for PC, or the first column after all of the hard
500 #ifndef DWARF_FRAME_RETURN_COLUMN
502 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
504 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
508 /* The mapping from gcc register number to DWARF 2 CFA column number. By
509 default, we just provide columns for all registers. */
510 #ifndef DWARF_FRAME_REGNUM
511 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
514 /* Hook used by __throw. */
517 expand_builtin_dwarf_fp_regnum ()
519 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
522 /* The offset from the incoming value of %sp to the top of the stack frame
523 for the current function. */
524 #ifndef INCOMING_FRAME_SP_OFFSET
525 #define INCOMING_FRAME_SP_OFFSET 0
528 /* Return a pointer to a copy of the section string name S with all
529 attributes stripped off, and an asterisk prepended (for assemble_name). */
535 char *stripped = xmalloc (strlen (s) + 2);
540 while (*s && *s != ',')
547 /* Return the register number described by a given RTL node. */
553 register unsigned regno = REGNO (rtl);
555 if (regno >= FIRST_PSEUDO_REGISTER)
557 warning ("internal regno botch: regno = %d\n", regno);
561 regno = DBX_REGISTER_NUMBER (regno);
565 struct reg_size_range
572 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
573 We do this in kind of a roundabout way, by building up a list of
574 register size ranges and seeing where our register falls in one of those
575 ranges. We need to do it this way because REG_TREE is not a constant,
576 and the target macros were not designed to make this task easy. */
579 expand_builtin_dwarf_reg_size (reg_tree, target)
583 enum machine_mode mode;
585 struct reg_size_range ranges[5];
592 for (; i < FIRST_PSEUDO_REGISTER; ++i)
594 /* The return address is out of order on the MIPS, and we don't use
595 copy_reg for it anyway, so we don't care here how large it is. */
596 if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
599 mode = reg_raw_mode[i];
601 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
602 to use the same size as word_mode, since that reduces the number
603 of ranges we need. It should not matter, since the result should
604 never be used for a condition code register anyways. */
605 if (GET_MODE_CLASS (mode) == MODE_CC)
608 size = GET_MODE_SIZE (mode);
610 /* If this register is not valid in the specified mode and
611 we have a previous size, use that for the size of this
612 register to avoid making junk tiny ranges. */
613 if (! HARD_REGNO_MODE_OK (i, mode) && last_size != -1)
616 if (size != last_size)
618 ranges[n_ranges].beg = i;
619 ranges[n_ranges].size = last_size = size;
624 ranges[n_ranges-1].end = i;
627 /* The usual case: fp regs surrounded by general regs. */
628 if (n_ranges == 3 && ranges[0].size == ranges[2].size)
630 if ((DWARF_FRAME_REGNUM (ranges[1].end)
631 - DWARF_FRAME_REGNUM (ranges[1].beg))
632 != ranges[1].end - ranges[1].beg)
634 t = fold (build (GE_EXPR, integer_type_node, reg_tree,
635 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].beg), 0)));
636 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
637 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].end), 0)));
638 t = fold (build (TRUTH_ANDIF_EXPR, integer_type_node, t, t2));
639 t = fold (build (COND_EXPR, integer_type_node, t,
640 build_int_2 (ranges[1].size, 0),
641 build_int_2 (ranges[0].size, 0)));
646 t = build_int_2 (ranges[n_ranges].size, 0);
647 size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
650 if ((DWARF_FRAME_REGNUM (ranges[n_ranges].end)
651 - DWARF_FRAME_REGNUM (ranges[n_ranges].beg))
652 != ranges[n_ranges].end - ranges[n_ranges].beg)
654 if (DWARF_FRAME_REGNUM (ranges[n_ranges].beg) >= size)
656 size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
657 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
658 build_int_2 (DWARF_FRAME_REGNUM
659 (ranges[n_ranges].end), 0)));
660 t = fold (build (COND_EXPR, integer_type_node, t2,
661 build_int_2 (ranges[n_ranges].size, 0), t));
664 return expand_expr (t, target, Pmode, 0);
667 /* Convert a DWARF call frame info. operation to its string name */
670 dwarf_cfi_name (cfi_opc)
671 register unsigned cfi_opc;
675 case DW_CFA_advance_loc:
676 return "DW_CFA_advance_loc";
678 return "DW_CFA_offset";
680 return "DW_CFA_restore";
684 return "DW_CFA_set_loc";
685 case DW_CFA_advance_loc1:
686 return "DW_CFA_advance_loc1";
687 case DW_CFA_advance_loc2:
688 return "DW_CFA_advance_loc2";
689 case DW_CFA_advance_loc4:
690 return "DW_CFA_advance_loc4";
691 case DW_CFA_offset_extended:
692 return "DW_CFA_offset_extended";
693 case DW_CFA_restore_extended:
694 return "DW_CFA_restore_extended";
695 case DW_CFA_undefined:
696 return "DW_CFA_undefined";
697 case DW_CFA_same_value:
698 return "DW_CFA_same_value";
699 case DW_CFA_register:
700 return "DW_CFA_register";
701 case DW_CFA_remember_state:
702 return "DW_CFA_remember_state";
703 case DW_CFA_restore_state:
704 return "DW_CFA_restore_state";
706 return "DW_CFA_def_cfa";
707 case DW_CFA_def_cfa_register:
708 return "DW_CFA_def_cfa_register";
709 case DW_CFA_def_cfa_offset:
710 return "DW_CFA_def_cfa_offset";
712 /* SGI/MIPS specific */
713 case DW_CFA_MIPS_advance_loc8:
714 return "DW_CFA_MIPS_advance_loc8";
717 case DW_CFA_GNU_window_save:
718 return "DW_CFA_GNU_window_save";
719 case DW_CFA_GNU_args_size:
720 return "DW_CFA_GNU_args_size";
723 return "DW_CFA_<unknown>";
727 /* Return a pointer to a newly allocated Call Frame Instruction. */
729 static inline dw_cfi_ref
732 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
734 cfi->dw_cfi_next = NULL;
735 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
736 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
741 /* Add a Call Frame Instruction to list of instructions. */
744 add_cfi (list_head, cfi)
745 register dw_cfi_ref *list_head;
746 register dw_cfi_ref cfi;
748 register dw_cfi_ref *p;
750 /* Find the end of the chain. */
751 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
757 /* Generate a new label for the CFI info to refer to. */
760 dwarf2out_cfi_label ()
762 static char label[20];
763 static unsigned long label_num = 0;
765 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
766 ASM_OUTPUT_LABEL (asm_out_file, label);
771 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
772 or to the CIE if LABEL is NULL. */
775 add_fde_cfi (label, cfi)
776 register char *label;
777 register dw_cfi_ref cfi;
781 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
784 label = dwarf2out_cfi_label ();
786 if (fde->dw_fde_current_label == NULL
787 || strcmp (label, fde->dw_fde_current_label) != 0)
789 register dw_cfi_ref xcfi;
791 fde->dw_fde_current_label = label = xstrdup (label);
793 /* Set the location counter to the new label. */
795 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
796 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
797 add_cfi (&fde->dw_fde_cfi, xcfi);
800 add_cfi (&fde->dw_fde_cfi, cfi);
804 add_cfi (&cie_cfi_head, cfi);
807 /* Subroutine of lookup_cfa. */
810 lookup_cfa_1 (cfi, regp, offsetp)
811 register dw_cfi_ref cfi;
812 register unsigned long *regp;
813 register long *offsetp;
815 switch (cfi->dw_cfi_opc)
817 case DW_CFA_def_cfa_offset:
818 *offsetp = cfi->dw_cfi_oprnd1.dw_cfi_offset;
820 case DW_CFA_def_cfa_register:
821 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
824 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
825 *offsetp = cfi->dw_cfi_oprnd2.dw_cfi_offset;
832 /* Find the previous value for the CFA. */
835 lookup_cfa (regp, offsetp)
836 register unsigned long *regp;
837 register long *offsetp;
839 register dw_cfi_ref cfi;
841 *regp = (unsigned long) -1;
844 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
845 lookup_cfa_1 (cfi, regp, offsetp);
847 if (fde_table_in_use)
849 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
850 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
851 lookup_cfa_1 (cfi, regp, offsetp);
855 /* The current rule for calculating the DWARF2 canonical frame address. */
856 static unsigned long cfa_reg;
857 static long cfa_offset;
859 /* The register used for saving registers to the stack, and its offset
861 static unsigned cfa_store_reg;
862 static long cfa_store_offset;
864 /* The running total of the size of arguments pushed onto the stack. */
865 static long args_size;
867 /* The last args_size we actually output. */
868 static long old_args_size;
870 /* Entry point to update the canonical frame address (CFA).
871 LABEL is passed to add_fde_cfi. The value of CFA is now to be
872 calculated from REG+OFFSET. */
875 dwarf2out_def_cfa (label, reg, offset)
876 register char *label;
877 register unsigned reg;
878 register long offset;
880 register dw_cfi_ref cfi;
881 unsigned long old_reg;
886 if (cfa_store_reg == reg)
887 cfa_store_offset = offset;
889 reg = DWARF_FRAME_REGNUM (reg);
890 lookup_cfa (&old_reg, &old_offset);
892 if (reg == old_reg && offset == old_offset)
899 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
900 cfi->dw_cfi_oprnd1.dw_cfi_offset = offset;
903 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
904 else if (offset == old_offset && old_reg != (unsigned long) -1)
906 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
907 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
913 cfi->dw_cfi_opc = DW_CFA_def_cfa;
914 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
915 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
918 add_fde_cfi (label, cfi);
921 /* Add the CFI for saving a register. REG is the CFA column number.
922 LABEL is passed to add_fde_cfi.
923 If SREG is -1, the register is saved at OFFSET from the CFA;
924 otherwise it is saved in SREG. */
927 reg_save (label, reg, sreg, offset)
928 register char * label;
929 register unsigned reg;
930 register unsigned sreg;
931 register long offset;
933 register dw_cfi_ref cfi = new_cfi ();
935 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
937 /* The following comparison is correct. -1 is used to indicate that
938 the value isn't a register number. */
939 if (sreg == (unsigned int) -1)
942 /* The register number won't fit in 6 bits, so we have to use
944 cfi->dw_cfi_opc = DW_CFA_offset_extended;
946 cfi->dw_cfi_opc = DW_CFA_offset;
948 offset /= DWARF_CIE_DATA_ALIGNMENT;
951 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
955 cfi->dw_cfi_opc = DW_CFA_register;
956 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
959 add_fde_cfi (label, cfi);
962 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
963 This CFI tells the unwinder that it needs to restore the window registers
964 from the previous frame's window save area.
966 ??? Perhaps we should note in the CIE where windows are saved (instead of
967 assuming 0(cfa)) and what registers are in the window. */
970 dwarf2out_window_save (label)
971 register char * label;
973 register dw_cfi_ref cfi = new_cfi ();
974 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
975 add_fde_cfi (label, cfi);
978 /* Add a CFI to update the running total of the size of arguments
979 pushed onto the stack. */
982 dwarf2out_args_size (label, size)
986 register dw_cfi_ref cfi;
988 if (size == old_args_size)
990 old_args_size = size;
993 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
994 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
995 add_fde_cfi (label, cfi);
998 /* Entry point for saving a register to the stack. REG is the GCC register
999 number. LABEL and OFFSET are passed to reg_save. */
1002 dwarf2out_reg_save (label, reg, offset)
1003 register char * label;
1004 register unsigned reg;
1005 register long offset;
1007 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
1010 /* Entry point for saving the return address in the stack.
1011 LABEL and OFFSET are passed to reg_save. */
1014 dwarf2out_return_save (label, offset)
1015 register char * label;
1016 register long offset;
1018 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1021 /* Entry point for saving the return address in a register.
1022 LABEL and SREG are passed to reg_save. */
1025 dwarf2out_return_reg (label, sreg)
1026 register char * label;
1027 register unsigned sreg;
1029 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1032 /* Record the initial position of the return address. RTL is
1033 INCOMING_RETURN_ADDR_RTX. */
1036 initial_return_save (rtl)
1042 switch (GET_CODE (rtl))
1045 /* RA is in a register. */
1046 reg = reg_number (rtl);
1049 /* RA is on the stack. */
1050 rtl = XEXP (rtl, 0);
1051 switch (GET_CODE (rtl))
1054 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1059 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1061 offset = INTVAL (XEXP (rtl, 1));
1064 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1066 offset = -INTVAL (XEXP (rtl, 1));
1073 /* The return address is at some offset from any value we can
1074 actually load. For instance, on the SPARC it is in %i7+8. Just
1075 ignore the offset for now; it doesn't matter for unwinding frames. */
1076 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1078 initial_return_save (XEXP (rtl, 0));
1084 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa_offset);
1087 /* Check INSN to see if it looks like a push or a stack adjustment, and
1088 make a note of it if it does. EH uses this information to find out how
1089 much extra space it needs to pop off the stack. */
1092 dwarf2out_stack_adjust (insn)
1098 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1100 /* Extract the size of the args from the CALL rtx itself. */
1102 insn = PATTERN (insn);
1103 if (GET_CODE (insn) == PARALLEL)
1104 insn = XVECEXP (insn, 0, 0);
1105 if (GET_CODE (insn) == SET)
1106 insn = SET_SRC (insn);
1107 assert (GET_CODE (insn) == CALL);
1108 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1112 /* If only calls can throw, and we have a frame pointer,
1113 save up adjustments until we see the CALL_INSN. */
1114 else if (! asynchronous_exceptions
1115 && cfa_reg != STACK_POINTER_REGNUM)
1118 if (GET_CODE (insn) == BARRIER)
1120 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1121 the compiler will have already emitted a stack adjustment, but
1122 doesn't bother for calls to noreturn functions. */
1123 #ifdef STACK_GROWS_DOWNWARD
1124 offset = -args_size;
1129 else if (GET_CODE (PATTERN (insn)) == SET)
1134 insn = PATTERN (insn);
1135 src = SET_SRC (insn);
1136 dest = SET_DEST (insn);
1138 if (dest == stack_pointer_rtx)
1140 /* (set (reg sp) (plus (reg sp) (const_int))) */
1141 code = GET_CODE (src);
1142 if (! (code == PLUS || code == MINUS)
1143 || XEXP (src, 0) != stack_pointer_rtx
1144 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1147 offset = INTVAL (XEXP (src, 1));
1149 else if (GET_CODE (dest) == MEM)
1151 /* (set (mem (pre_dec (reg sp))) (foo)) */
1152 src = XEXP (dest, 0);
1153 code = GET_CODE (src);
1155 if (! (code == PRE_DEC || code == PRE_INC)
1156 || XEXP (src, 0) != stack_pointer_rtx)
1159 offset = GET_MODE_SIZE (GET_MODE (dest));
1164 if (code == PLUS || code == PRE_INC)
1173 if (cfa_reg == STACK_POINTER_REGNUM)
1174 cfa_offset += offset;
1176 #ifndef STACK_GROWS_DOWNWARD
1179 args_size += offset;
1183 label = dwarf2out_cfi_label ();
1184 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1185 dwarf2out_args_size (label, args_size);
1188 /* Record call frame debugging information for INSN, which either
1189 sets SP or FP (adjusting how we calculate the frame address) or saves a
1190 register to the stack. If INSN is NULL_RTX, initialize our state. */
1193 dwarf2out_frame_debug (insn)
1200 /* A temporary register used in adjusting SP or setting up the store_reg. */
1201 static unsigned cfa_temp_reg;
1202 static long cfa_temp_value;
1204 if (insn == NULL_RTX)
1206 /* Set up state for generating call frame debug info. */
1207 lookup_cfa (&cfa_reg, &cfa_offset);
1208 if (cfa_reg != DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1210 cfa_reg = STACK_POINTER_REGNUM;
1211 cfa_store_reg = cfa_reg;
1212 cfa_store_offset = cfa_offset;
1218 if (! RTX_FRAME_RELATED_P (insn))
1220 dwarf2out_stack_adjust (insn);
1224 label = dwarf2out_cfi_label ();
1226 insn = PATTERN (insn);
1227 /* Assume that in a PARALLEL prologue insn, only the first elt is
1228 significant. Currently this is true. */
1229 if (GET_CODE (insn) == PARALLEL)
1230 insn = XVECEXP (insn, 0, 0);
1231 if (GET_CODE (insn) != SET)
1234 src = SET_SRC (insn);
1235 dest = SET_DEST (insn);
1237 switch (GET_CODE (dest))
1240 /* Update the CFA rule wrt SP or FP. Make sure src is
1241 relative to the current CFA register. */
1242 switch (GET_CODE (src))
1244 /* Setting FP from SP. */
1246 if (cfa_reg != REGNO (src))
1248 if (REGNO (dest) != STACK_POINTER_REGNUM
1249 && !(frame_pointer_needed
1250 && REGNO (dest) == HARD_FRAME_POINTER_REGNUM))
1252 cfa_reg = REGNO (dest);
1257 if (dest == stack_pointer_rtx)
1260 switch (GET_CODE (XEXP (src, 1)))
1263 offset = INTVAL (XEXP (src, 1));
1266 if (REGNO (XEXP (src, 1)) != cfa_temp_reg)
1268 offset = cfa_temp_value;
1274 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1276 /* Restoring SP from FP in the epilogue. */
1277 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1279 cfa_reg = STACK_POINTER_REGNUM;
1281 else if (XEXP (src, 0) != stack_pointer_rtx)
1284 if (GET_CODE (src) == PLUS)
1286 if (cfa_reg == STACK_POINTER_REGNUM)
1287 cfa_offset += offset;
1288 if (cfa_store_reg == STACK_POINTER_REGNUM)
1289 cfa_store_offset += offset;
1291 else if (dest == hard_frame_pointer_rtx)
1293 /* Either setting the FP from an offset of the SP,
1294 or adjusting the FP */
1295 if (! frame_pointer_needed
1296 || REGNO (dest) != HARD_FRAME_POINTER_REGNUM)
1299 if (XEXP (src, 0) == stack_pointer_rtx
1300 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1302 if (cfa_reg != STACK_POINTER_REGNUM)
1304 offset = INTVAL (XEXP (src, 1));
1305 if (GET_CODE (src) == PLUS)
1307 cfa_offset += offset;
1308 cfa_reg = HARD_FRAME_POINTER_REGNUM;
1310 else if (XEXP (src, 0) == hard_frame_pointer_rtx
1311 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1313 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1315 offset = INTVAL (XEXP (src, 1));
1316 if (GET_CODE (src) == PLUS)
1318 cfa_offset += offset;
1326 if (GET_CODE (src) != PLUS
1327 || XEXP (src, 1) != stack_pointer_rtx)
1329 if (GET_CODE (XEXP (src, 0)) != REG
1330 || REGNO (XEXP (src, 0)) != cfa_temp_reg)
1332 if (cfa_reg != STACK_POINTER_REGNUM)
1334 cfa_store_reg = REGNO (dest);
1335 cfa_store_offset = cfa_offset - cfa_temp_value;
1340 cfa_temp_reg = REGNO (dest);
1341 cfa_temp_value = INTVAL (src);
1345 if (GET_CODE (XEXP (src, 0)) != REG
1346 || REGNO (XEXP (src, 0)) != cfa_temp_reg
1347 || REGNO (dest) != cfa_temp_reg
1348 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1350 cfa_temp_value |= INTVAL (XEXP (src, 1));
1356 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1360 /* Saving a register to the stack. Make sure dest is relative to the
1362 if (GET_CODE (src) != REG)
1364 switch (GET_CODE (XEXP (dest, 0)))
1369 offset = GET_MODE_SIZE (GET_MODE (dest));
1370 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1373 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1374 || cfa_store_reg != STACK_POINTER_REGNUM)
1376 cfa_store_offset += offset;
1377 if (cfa_reg == STACK_POINTER_REGNUM)
1378 cfa_offset = cfa_store_offset;
1380 offset = -cfa_store_offset;
1383 /* With an offset. */
1386 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1387 if (GET_CODE (src) == MINUS)
1390 if (cfa_store_reg != REGNO (XEXP (XEXP (dest, 0), 0)))
1392 offset -= cfa_store_offset;
1398 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1399 dwarf2out_reg_save (label, REGNO (src), offset);
1407 /* Return the size of an unsigned LEB128 quantity. */
1409 static inline unsigned long
1410 size_of_uleb128 (value)
1411 register unsigned long value;
1413 register unsigned long size = 0;
1414 register unsigned byte;
1418 byte = (value & 0x7f);
1427 /* Return the size of a signed LEB128 quantity. */
1429 static inline unsigned long
1430 size_of_sleb128 (value)
1431 register long value;
1433 register unsigned long size = 0;
1434 register unsigned byte;
1438 byte = (value & 0x7f);
1442 while (!(((value == 0) && ((byte & 0x40) == 0))
1443 || ((value == -1) && ((byte & 0x40) != 0))));
1448 /* Output an unsigned LEB128 quantity. */
1451 output_uleb128 (value)
1452 register unsigned long value;
1454 unsigned long save_value = value;
1456 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1459 register unsigned byte = (value & 0x7f);
1462 /* More bytes to follow. */
1465 fprintf (asm_out_file, "0x%x", byte);
1467 fprintf (asm_out_file, ",");
1472 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1475 /* Output an signed LEB128 quantity. */
1478 output_sleb128 (value)
1479 register long value;
1482 register unsigned byte;
1483 long save_value = value;
1485 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1488 byte = (value & 0x7f);
1489 /* arithmetic shift */
1491 more = !((((value == 0) && ((byte & 0x40) == 0))
1492 || ((value == -1) && ((byte & 0x40) != 0))));
1496 fprintf (asm_out_file, "0x%x", byte);
1498 fprintf (asm_out_file, ",");
1503 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1506 /* Output a Call Frame Information opcode and its operand(s). */
1509 output_cfi (cfi, fde)
1510 register dw_cfi_ref cfi;
1511 register dw_fde_ref fde;
1513 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1515 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1517 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1519 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1520 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1521 fputc ('\n', asm_out_file);
1524 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1526 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1528 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1530 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1531 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1533 fputc ('\n', asm_out_file);
1534 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1535 fputc ('\n', asm_out_file);
1537 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1539 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1541 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1543 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1544 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1546 fputc ('\n', asm_out_file);
1550 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1552 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1553 dwarf_cfi_name (cfi->dw_cfi_opc));
1555 fputc ('\n', asm_out_file);
1556 switch (cfi->dw_cfi_opc)
1558 case DW_CFA_set_loc:
1559 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1560 fputc ('\n', asm_out_file);
1562 case DW_CFA_advance_loc1:
1563 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1564 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1565 fde->dw_fde_current_label);
1566 fputc ('\n', asm_out_file);
1567 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1569 case DW_CFA_advance_loc2:
1570 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1571 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1572 fde->dw_fde_current_label);
1573 fputc ('\n', asm_out_file);
1574 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1576 case DW_CFA_advance_loc4:
1577 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1578 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1579 fde->dw_fde_current_label);
1580 fputc ('\n', asm_out_file);
1581 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1583 #ifdef MIPS_DEBUGGING_INFO
1584 case DW_CFA_MIPS_advance_loc8:
1585 /* TODO: not currently implemented. */
1589 case DW_CFA_offset_extended:
1590 case DW_CFA_def_cfa:
1591 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1592 fputc ('\n', asm_out_file);
1593 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1594 fputc ('\n', asm_out_file);
1596 case DW_CFA_restore_extended:
1597 case DW_CFA_undefined:
1598 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1599 fputc ('\n', asm_out_file);
1601 case DW_CFA_same_value:
1602 case DW_CFA_def_cfa_register:
1603 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1604 fputc ('\n', asm_out_file);
1606 case DW_CFA_register:
1607 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1608 fputc ('\n', asm_out_file);
1609 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1610 fputc ('\n', asm_out_file);
1612 case DW_CFA_def_cfa_offset:
1613 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1614 fputc ('\n', asm_out_file);
1616 case DW_CFA_GNU_window_save:
1618 case DW_CFA_GNU_args_size:
1619 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1620 fputc ('\n', asm_out_file);
1628 #if !defined (EH_FRAME_SECTION)
1629 #if defined (EH_FRAME_SECTION_ASM_OP)
1630 #define EH_FRAME_SECTION() eh_frame_section();
1632 #if defined (ASM_OUTPUT_SECTION_NAME)
1633 #define EH_FRAME_SECTION() \
1635 named_section (NULL_TREE, ".eh_frame", 0); \
1641 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
1642 #if !defined (HAS_INIT_SECTION) && !defined (INIT_SECTION_ASM_OP)
1643 #undef EH_FRAME_SECTION
1646 /* Output the call frame information used to used to record information
1647 that relates to calculating the frame pointer, and records the
1648 location of saved registers. */
1651 output_call_frame_info (for_eh)
1654 register unsigned long i;
1655 register dw_fde_ref fde;
1656 register dw_cfi_ref cfi;
1657 char l1[20], l2[20];
1658 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1662 /* Do we want to include a pointer to the exception table? */
1663 int eh_ptr = for_eh && exception_table_p ();
1665 fputc ('\n', asm_out_file);
1667 /* We're going to be generating comments, so turn on app. */
1673 #ifdef EH_FRAME_SECTION
1674 EH_FRAME_SECTION ();
1676 tree label = get_file_function_name ('F');
1679 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1680 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1681 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1683 assemble_label ("__FRAME_BEGIN__");
1686 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1688 /* Output the CIE. */
1689 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1690 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1691 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1692 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1694 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1696 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1699 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1701 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1704 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1707 fputc ('\n', asm_out_file);
1708 ASM_OUTPUT_LABEL (asm_out_file, l1);
1711 /* Now that the CIE pointer is PC-relative for EH,
1712 use 0 to identify the CIE. */
1713 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1715 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1718 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1720 fputc ('\n', asm_out_file);
1721 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1723 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1724 fputc ('\n', asm_out_file);
1727 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1729 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1731 fputc ('\n', asm_out_file);
1734 /* The CIE contains a pointer to the exception region info for the
1735 frame. Make the augmentation string three bytes (including the
1736 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1737 can't handle unaligned relocs. */
1740 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1741 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1745 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1747 fputc ('\n', asm_out_file);
1749 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1751 fprintf (asm_out_file, "\t%s pointer to exception region info",
1756 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1758 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1762 fputc ('\n', asm_out_file);
1765 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1767 fputc ('\n', asm_out_file);
1768 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1770 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1772 fputc ('\n', asm_out_file);
1773 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1775 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1777 fputc ('\n', asm_out_file);
1779 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1780 output_cfi (cfi, NULL);
1782 /* Pad the CIE out to an address sized boundary. */
1783 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1784 ASM_OUTPUT_LABEL (asm_out_file, l2);
1785 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1786 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1788 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1789 fputc ('\n', asm_out_file);
1792 /* Loop through all of the FDE's. */
1793 for (i = 0; i < fde_table_in_use; ++i)
1795 fde = &fde_table[i];
1797 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1798 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1799 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1800 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1802 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1804 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1807 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1809 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1812 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1813 fputc ('\n', asm_out_file);
1814 ASM_OUTPUT_LABEL (asm_out_file, l1);
1817 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l1, "__FRAME_BEGIN__");
1819 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1821 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1823 fputc ('\n', asm_out_file);
1824 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1826 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1828 fputc ('\n', asm_out_file);
1829 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1830 fde->dw_fde_end, fde->dw_fde_begin);
1832 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1834 fputc ('\n', asm_out_file);
1836 /* Loop through the Call Frame Instructions associated with
1838 fde->dw_fde_current_label = fde->dw_fde_begin;
1839 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1840 output_cfi (cfi, fde);
1842 /* Pad the FDE out to an address sized boundary. */
1843 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1844 ASM_OUTPUT_LABEL (asm_out_file, l2);
1845 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1846 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1848 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1849 fputc ('\n', asm_out_file);
1852 #ifndef EH_FRAME_SECTION
1855 /* Emit terminating zero for table. */
1856 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1857 fputc ('\n', asm_out_file);
1860 #ifdef MIPS_DEBUGGING_INFO
1861 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1862 get a value of 0. Putting .align 0 after the label fixes it. */
1863 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1866 /* Turn off app to make assembly quicker. */
1871 /* Output a marker (i.e. a label) for the beginning of a function, before
1875 dwarf2out_begin_prologue ()
1877 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1878 register dw_fde_ref fde;
1880 ++current_funcdef_number;
1882 function_section (current_function_decl);
1883 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1884 current_funcdef_number);
1885 ASM_OUTPUT_LABEL (asm_out_file, label);
1887 /* Expand the fde table if necessary. */
1888 if (fde_table_in_use == fde_table_allocated)
1890 fde_table_allocated += FDE_TABLE_INCREMENT;
1892 = (dw_fde_ref) xrealloc (fde_table,
1893 fde_table_allocated * sizeof (dw_fde_node));
1896 /* Record the FDE associated with this function. */
1897 current_funcdef_fde = fde_table_in_use;
1899 /* Add the new FDE at the end of the fde_table. */
1900 fde = &fde_table[fde_table_in_use++];
1901 fde->dw_fde_begin = xstrdup (label);
1902 fde->dw_fde_current_label = NULL;
1903 fde->dw_fde_end = NULL;
1904 fde->dw_fde_cfi = NULL;
1906 args_size = old_args_size = 0;
1909 /* Output a marker (i.e. a label) for the absolute end of the generated code
1910 for a function definition. This gets called *after* the epilogue code has
1914 dwarf2out_end_epilogue ()
1917 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1919 /* Output a label to mark the endpoint of the code generated for this
1921 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
1922 ASM_OUTPUT_LABEL (asm_out_file, label);
1923 fde = &fde_table[fde_table_in_use - 1];
1924 fde->dw_fde_end = xstrdup (label);
1928 dwarf2out_frame_init ()
1930 /* Allocate the initial hunk of the fde_table. */
1932 = (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1933 bzero ((char *) fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1934 fde_table_allocated = FDE_TABLE_INCREMENT;
1935 fde_table_in_use = 0;
1937 /* Generate the CFA instructions common to all FDE's. Do it now for the
1938 sake of lookup_cfa. */
1940 #ifdef DWARF2_UNWIND_INFO
1941 /* On entry, the Canonical Frame Address is at SP. */
1942 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
1943 initial_return_save (INCOMING_RETURN_ADDR_RTX);
1948 dwarf2out_frame_finish ()
1950 /* Output call frame information. */
1951 #ifdef MIPS_DEBUGGING_INFO
1952 if (write_symbols == DWARF2_DEBUG)
1953 output_call_frame_info (0);
1954 if (flag_exceptions && ! exceptions_via_longjmp)
1955 output_call_frame_info (1);
1957 if (write_symbols == DWARF2_DEBUG
1958 || (flag_exceptions && ! exceptions_via_longjmp))
1959 output_call_frame_info (1);
1963 #endif /* .debug_frame support */
1965 /* And now, the support for symbolic debugging information. */
1966 #ifdef DWARF2_DEBUGGING_INFO
1968 extern char *getpwd PROTO((void));
1970 /* NOTE: In the comments in this file, many references are made to
1971 "Debugging Information Entries". This term is abbreviated as `DIE'
1972 throughout the remainder of this file. */
1974 /* An internal representation of the DWARF output is built, and then
1975 walked to generate the DWARF debugging info. The walk of the internal
1976 representation is done after the entire program has been compiled.
1977 The types below are used to describe the internal representation. */
1979 /* Each DIE may have a series of attribute/value pairs. Values
1980 can take on several forms. The forms that are used in this
1981 implementation are listed below. */
1988 dw_val_class_unsigned_const,
1989 dw_val_class_long_long,
1992 dw_val_class_die_ref,
1993 dw_val_class_fde_ref,
1994 dw_val_class_lbl_id,
1995 dw_val_class_section_offset,
2000 /* Various DIE's use offsets relative to the beginning of the
2001 .debug_info section to refer to each other. */
2003 typedef long int dw_offset;
2005 /* Define typedefs here to avoid circular dependencies. */
2007 typedef struct die_struct *dw_die_ref;
2008 typedef struct dw_attr_struct *dw_attr_ref;
2009 typedef struct dw_val_struct *dw_val_ref;
2010 typedef struct dw_line_info_struct *dw_line_info_ref;
2011 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2012 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2013 typedef struct pubname_struct *pubname_ref;
2014 typedef dw_die_ref *arange_ref;
2016 /* Describe a double word constant value. */
2018 typedef struct dw_long_long_struct
2025 /* Describe a floating point constant value. */
2027 typedef struct dw_fp_struct
2034 /* Each entry in the line_info_table maintains the file and
2035 line number associated with the label generated for that
2036 entry. The label gives the PC value associated with
2037 the line number entry. */
2039 typedef struct dw_line_info_struct
2041 unsigned long dw_file_num;
2042 unsigned long dw_line_num;
2046 /* Line information for functions in separate sections; each one gets its
2048 typedef struct dw_separate_line_info_struct
2050 unsigned long dw_file_num;
2051 unsigned long dw_line_num;
2052 unsigned long function;
2054 dw_separate_line_info_entry;
2056 /* The dw_val_node describes an attribute's value, as it is
2057 represented internally. */
2059 typedef struct dw_val_struct
2061 dw_val_class val_class;
2065 dw_loc_descr_ref val_loc;
2067 long unsigned val_unsigned;
2068 dw_long_long_const val_long_long;
2069 dw_float_const val_float;
2070 dw_die_ref val_die_ref;
2071 unsigned val_fde_index;
2075 unsigned char val_flag;
2081 /* Locations in memory are described using a sequence of stack machine
2084 typedef struct dw_loc_descr_struct
2086 dw_loc_descr_ref dw_loc_next;
2087 enum dwarf_location_atom dw_loc_opc;
2088 dw_val_node dw_loc_oprnd1;
2089 dw_val_node dw_loc_oprnd2;
2093 /* Each DIE attribute has a field specifying the attribute kind,
2094 a link to the next attribute in the chain, and an attribute value.
2095 Attributes are typically linked below the DIE they modify. */
2097 typedef struct dw_attr_struct
2099 enum dwarf_attribute dw_attr;
2100 dw_attr_ref dw_attr_next;
2101 dw_val_node dw_attr_val;
2105 /* The Debugging Information Entry (DIE) structure */
2107 typedef struct die_struct
2109 enum dwarf_tag die_tag;
2110 dw_attr_ref die_attr;
2111 dw_attr_ref die_attr_last;
2112 dw_die_ref die_parent;
2113 dw_die_ref die_child;
2114 dw_die_ref die_child_last;
2116 dw_offset die_offset;
2117 unsigned long die_abbrev;
2121 /* The pubname structure */
2123 typedef struct pubname_struct
2130 /* The limbo die list structure. */
2131 typedef struct limbo_die_struct
2134 struct limbo_die_struct *next;
2138 /* How to start an assembler comment. */
2139 #ifndef ASM_COMMENT_START
2140 #define ASM_COMMENT_START ";#"
2143 /* Define a macro which returns non-zero for a TYPE_DECL which was
2144 implicitly generated for a tagged type.
2146 Note that unlike the gcc front end (which generates a NULL named
2147 TYPE_DECL node for each complete tagged type, each array type, and
2148 each function type node created) the g++ front end generates a
2149 _named_ TYPE_DECL node for each tagged type node created.
2150 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2151 generate a DW_TAG_typedef DIE for them. */
2153 #define TYPE_DECL_IS_STUB(decl) \
2154 (DECL_NAME (decl) == NULL_TREE \
2155 || (DECL_ARTIFICIAL (decl) \
2156 && is_tagged_type (TREE_TYPE (decl)) \
2157 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2158 /* This is necessary for stub decls that \
2159 appear in nested inline functions. */ \
2160 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2161 && (decl_ultimate_origin (decl) \
2162 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2164 /* Information concerning the compilation unit's programming
2165 language, and compiler version. */
2167 extern int flag_traditional;
2168 extern char *version_string;
2169 extern char *language_string;
2171 /* Fixed size portion of the DWARF compilation unit header. */
2172 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2174 /* Fixed size portion of debugging line information prolog. */
2175 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2177 /* Fixed size portion of public names info. */
2178 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2180 /* Fixed size portion of the address range info. */
2181 #define DWARF_ARANGES_HEADER_SIZE \
2182 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2184 /* Define the architecture-dependent minimum instruction length (in bytes).
2185 In this implementation of DWARF, this field is used for information
2186 purposes only. Since GCC generates assembly language, we have
2187 no a priori knowledge of how many instruction bytes are generated
2188 for each source line, and therefore can use only the DW_LNE_set_address
2189 and DW_LNS_fixed_advance_pc line information commands. */
2191 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2192 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2195 /* Minimum line offset in a special line info. opcode.
2196 This value was chosen to give a reasonable range of values. */
2197 #define DWARF_LINE_BASE -10
2199 /* First special line opcde - leave room for the standard opcodes. */
2200 #define DWARF_LINE_OPCODE_BASE 10
2202 /* Range of line offsets in a special line info. opcode. */
2203 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2205 /* Flag that indicates the initial value of the is_stmt_start flag.
2206 In the present implementation, we do not mark any lines as
2207 the beginning of a source statement, because that information
2208 is not made available by the GCC front-end. */
2209 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2211 /* This location is used by calc_die_sizes() to keep track
2212 the offset of each DIE within the .debug_info section. */
2213 static unsigned long next_die_offset;
2215 /* Record the root of the DIE's built for the current compilation unit. */
2216 static dw_die_ref comp_unit_die;
2218 /* A list of DIEs with a NULL parent waiting to be relocated. */
2219 static limbo_die_node *limbo_die_list = 0;
2221 /* Pointer to an array of filenames referenced by this compilation unit. */
2222 static char **file_table;
2224 /* Total number of entries in the table (i.e. array) pointed to by
2225 `file_table'. This is the *total* and includes both used and unused
2227 static unsigned file_table_allocated;
2229 /* Number of entries in the file_table which are actually in use. */
2230 static unsigned file_table_in_use;
2232 /* Size (in elements) of increments by which we may expand the filename
2234 #define FILE_TABLE_INCREMENT 64
2236 /* Local pointer to the name of the main input file. Initialized in
2238 static char *primary_filename;
2240 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2241 which their beginnings are encountered. We output Dwarf debugging info
2242 that refers to the beginnings and ends of the ranges of code for each
2243 lexical block. The labels themselves are generated in final.c, which
2244 assigns numbers to the blocks in the same way. */
2245 static unsigned next_block_number = 2;
2247 /* A pointer to the base of a table of references to DIE's that describe
2248 declarations. The table is indexed by DECL_UID() which is a unique
2249 number identifying each decl. */
2250 static dw_die_ref *decl_die_table;
2252 /* Number of elements currently allocated for the decl_die_table. */
2253 static unsigned decl_die_table_allocated;
2255 /* Number of elements in decl_die_table currently in use. */
2256 static unsigned decl_die_table_in_use;
2258 /* Size (in elements) of increments by which we may expand the
2260 #define DECL_DIE_TABLE_INCREMENT 256
2262 /* Structure used for the decl_scope table. scope is the current declaration
2263 scope, and previous is the entry that is the parent of this scope. This
2264 is usually but not always the immediately preceeding entry. */
2266 typedef struct decl_scope_struct
2273 /* A pointer to the base of a table of references to declaration
2274 scopes. This table is a display which tracks the nesting
2275 of declaration scopes at the current scope and containing
2276 scopes. This table is used to find the proper place to
2277 define type declaration DIE's. */
2278 static decl_scope_node *decl_scope_table;
2280 /* Number of elements currently allocated for the decl_scope_table. */
2281 static int decl_scope_table_allocated;
2283 /* Current level of nesting of declaration scopes. */
2284 static int decl_scope_depth;
2286 /* Size (in elements) of increments by which we may expand the
2287 decl_scope_table. */
2288 #define DECL_SCOPE_TABLE_INCREMENT 64
2290 /* A pointer to the base of a list of references to DIE's that
2291 are uniquely identified by their tag, presence/absence of
2292 children DIE's, and list of attribute/value pairs. */
2293 static dw_die_ref *abbrev_die_table;
2295 /* Number of elements currently allocated for abbrev_die_table. */
2296 static unsigned abbrev_die_table_allocated;
2298 /* Number of elements in type_die_table currently in use. */
2299 static unsigned abbrev_die_table_in_use;
2301 /* Size (in elements) of increments by which we may expand the
2302 abbrev_die_table. */
2303 #define ABBREV_DIE_TABLE_INCREMENT 256
2305 /* A pointer to the base of a table that contains line information
2306 for each source code line in .text in the compilation unit. */
2307 static dw_line_info_ref line_info_table;
2309 /* Number of elements currently allocated for line_info_table. */
2310 static unsigned line_info_table_allocated;
2312 /* Number of elements in separate_line_info_table currently in use. */
2313 static unsigned separate_line_info_table_in_use;
2315 /* A pointer to the base of a table that contains line information
2316 for each source code line outside of .text in the compilation unit. */
2317 static dw_separate_line_info_ref separate_line_info_table;
2319 /* Number of elements currently allocated for separate_line_info_table. */
2320 static unsigned separate_line_info_table_allocated;
2322 /* Number of elements in line_info_table currently in use. */
2323 static unsigned line_info_table_in_use;
2325 /* Size (in elements) of increments by which we may expand the
2327 #define LINE_INFO_TABLE_INCREMENT 1024
2329 /* A pointer to the base of a table that contains a list of publicly
2330 accessible names. */
2331 static pubname_ref pubname_table;
2333 /* Number of elements currently allocated for pubname_table. */
2334 static unsigned pubname_table_allocated;
2336 /* Number of elements in pubname_table currently in use. */
2337 static unsigned pubname_table_in_use;
2339 /* Size (in elements) of increments by which we may expand the
2341 #define PUBNAME_TABLE_INCREMENT 64
2343 /* A pointer to the base of a table that contains a list of publicly
2344 accessible names. */
2345 static arange_ref arange_table;
2347 /* Number of elements currently allocated for arange_table. */
2348 static unsigned arange_table_allocated;
2350 /* Number of elements in arange_table currently in use. */
2351 static unsigned arange_table_in_use;
2353 /* Size (in elements) of increments by which we may expand the
2355 #define ARANGE_TABLE_INCREMENT 64
2357 /* A pointer to the base of a list of pending types which we haven't
2358 generated DIEs for yet, but which we will have to come back to
2361 static tree *pending_types_list;
2363 /* Number of elements currently allocated for the pending_types_list. */
2364 static unsigned pending_types_allocated;
2366 /* Number of elements of pending_types_list currently in use. */
2367 static unsigned pending_types;
2369 /* Size (in elements) of increments by which we may expand the pending
2370 types list. Actually, a single hunk of space of this size should
2371 be enough for most typical programs. */
2372 #define PENDING_TYPES_INCREMENT 64
2374 /* Record whether the function being analyzed contains inlined functions. */
2375 static int current_function_has_inlines;
2376 #if 0 && defined (MIPS_DEBUGGING_INFO)
2377 static int comp_unit_has_inlines;
2380 /* A pointer to the ..._DECL node which we have most recently been working
2381 on. We keep this around just in case something about it looks screwy and
2382 we want to tell the user what the source coordinates for the actual
2384 static tree dwarf_last_decl;
2386 /* Forward declarations for functions defined in this file. */
2388 static void addr_const_to_string PROTO((dyn_string_t, rtx));
2389 static char *addr_to_string PROTO((rtx));
2390 static int is_pseudo_reg PROTO((rtx));
2391 static tree type_main_variant PROTO((tree));
2392 static int is_tagged_type PROTO((tree));
2393 static char *dwarf_tag_name PROTO((unsigned));
2394 static char *dwarf_attr_name PROTO((unsigned));
2395 static char *dwarf_form_name PROTO((unsigned));
2396 static char *dwarf_stack_op_name PROTO((unsigned));
2398 static char *dwarf_type_encoding_name PROTO((unsigned));
2400 static tree decl_ultimate_origin PROTO((tree));
2401 static tree block_ultimate_origin PROTO((tree));
2402 static tree decl_class_context PROTO((tree));
2403 static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
2404 static void add_AT_flag PROTO((dw_die_ref,
2405 enum dwarf_attribute,
2407 static void add_AT_int PROTO((dw_die_ref,
2408 enum dwarf_attribute, long));
2409 static void add_AT_unsigned PROTO((dw_die_ref,
2410 enum dwarf_attribute,
2412 static void add_AT_long_long PROTO((dw_die_ref,
2413 enum dwarf_attribute,
2414 unsigned long, unsigned long));
2415 static void add_AT_float PROTO((dw_die_ref,
2416 enum dwarf_attribute,
2418 static void add_AT_string PROTO((dw_die_ref,
2419 enum dwarf_attribute, char *));
2420 static void add_AT_die_ref PROTO((dw_die_ref,
2421 enum dwarf_attribute,
2423 static void add_AT_fde_ref PROTO((dw_die_ref,
2424 enum dwarf_attribute,
2426 static void add_AT_loc PROTO((dw_die_ref,
2427 enum dwarf_attribute,
2429 static void add_AT_addr PROTO((dw_die_ref,
2430 enum dwarf_attribute, char *));
2431 static void add_AT_lbl_id PROTO((dw_die_ref,
2432 enum dwarf_attribute, char *));
2433 static void add_AT_section_offset PROTO((dw_die_ref,
2434 enum dwarf_attribute, char *));
2435 static int is_extern_subr_die PROTO((dw_die_ref));
2436 static dw_attr_ref get_AT PROTO((dw_die_ref,
2437 enum dwarf_attribute));
2438 static char *get_AT_low_pc PROTO((dw_die_ref));
2439 static char *get_AT_hi_pc PROTO((dw_die_ref));
2440 static char *get_AT_string PROTO((dw_die_ref,
2441 enum dwarf_attribute));
2442 static int get_AT_flag PROTO((dw_die_ref,
2443 enum dwarf_attribute));
2444 static unsigned get_AT_unsigned PROTO((dw_die_ref,
2445 enum dwarf_attribute));
2446 static int is_c_family PROTO((void));
2447 static int is_fortran PROTO((void));
2448 static void remove_AT PROTO((dw_die_ref,
2449 enum dwarf_attribute));
2450 static void remove_children PROTO((dw_die_ref));
2451 static void add_child_die PROTO((dw_die_ref, dw_die_ref));
2452 static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
2453 static dw_die_ref lookup_type_die PROTO((tree));
2454 static void equate_type_number_to_die PROTO((tree, dw_die_ref));
2455 static dw_die_ref lookup_decl_die PROTO((tree));
2456 static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
2457 static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
2458 unsigned long, unsigned long));
2459 static void add_loc_descr PROTO((dw_loc_descr_ref *,
2461 static void print_spaces PROTO((FILE *));
2462 static void print_die PROTO((dw_die_ref, FILE *));
2463 static void print_dwarf_line_table PROTO((FILE *));
2464 static void add_sibling_attributes PROTO((dw_die_ref));
2465 static void build_abbrev_table PROTO((dw_die_ref));
2466 static unsigned long size_of_string PROTO((char *));
2467 static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
2468 static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
2469 static int constant_size PROTO((long unsigned));
2470 static unsigned long size_of_die PROTO((dw_die_ref));
2471 static void calc_die_sizes PROTO((dw_die_ref));
2472 static unsigned long size_of_line_prolog PROTO((void));
2473 static unsigned long size_of_line_info PROTO((void));
2474 static unsigned long size_of_pubnames PROTO((void));
2475 static unsigned long size_of_aranges PROTO((void));
2476 static enum dwarf_form value_format PROTO((dw_val_ref));
2477 static void output_value_format PROTO((dw_val_ref));
2478 static void output_abbrev_section PROTO((void));
2479 static void output_loc_operands PROTO((dw_loc_descr_ref));
2480 static unsigned long sibling_offset PROTO((dw_die_ref));
2481 static void output_die PROTO((dw_die_ref));
2482 static void output_compilation_unit_header PROTO((void));
2483 static char *dwarf2_name PROTO((tree, int));
2484 static void add_pubname PROTO((tree, dw_die_ref));
2485 static void output_pubnames PROTO((void));
2486 static void add_arange PROTO((tree, dw_die_ref));
2487 static void output_aranges PROTO((void));
2488 static void output_line_info PROTO((void));
2489 static int is_body_block PROTO((tree));
2490 static dw_die_ref base_type_die PROTO((tree));
2491 static tree root_type PROTO((tree));
2492 static int is_base_type PROTO((tree));
2493 static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
2494 static int type_is_enum PROTO((tree));
2495 static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
2496 static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
2497 static int is_based_loc PROTO((rtx));
2498 static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx));
2499 static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
2500 static dw_loc_descr_ref loc_descriptor PROTO((rtx));
2501 static unsigned ceiling PROTO((unsigned, unsigned));
2502 static tree field_type PROTO((tree));
2503 static unsigned simple_type_align_in_bits PROTO((tree));
2504 static unsigned simple_type_size_in_bits PROTO((tree));
2505 static unsigned field_byte_offset PROTO((tree));
2506 static void add_AT_location_description PROTO((dw_die_ref,
2507 enum dwarf_attribute, rtx));
2508 static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
2509 static void add_const_value_attribute PROTO((dw_die_ref, rtx));
2510 static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
2511 static void add_name_attribute PROTO((dw_die_ref, char *));
2512 static void add_bound_info PROTO((dw_die_ref,
2513 enum dwarf_attribute, tree));
2514 static void add_subscript_info PROTO((dw_die_ref, tree));
2515 static void add_byte_size_attribute PROTO((dw_die_ref, tree));
2516 static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
2517 static void add_bit_size_attribute PROTO((dw_die_ref, tree));
2518 static void add_prototyped_attribute PROTO((dw_die_ref, tree));
2519 static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
2520 static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
2521 static void add_src_coords_attributes PROTO((dw_die_ref, tree));
2522 static void add_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
2523 static void push_decl_scope PROTO((tree));
2524 static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
2525 static void pop_decl_scope PROTO((void));
2526 static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
2528 static char *type_tag PROTO((tree));
2529 static tree member_declared_type PROTO((tree));
2531 static char *decl_start_label PROTO((tree));
2533 static void gen_array_type_die PROTO((tree, dw_die_ref));
2534 static void gen_set_type_die PROTO((tree, dw_die_ref));
2536 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2538 static void pend_type PROTO((tree));
2539 static void output_pending_types_for_scope PROTO((dw_die_ref));
2540 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2541 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2542 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2543 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2544 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2545 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2546 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2547 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2548 static void gen_variable_die PROTO((tree, dw_die_ref));
2549 static void gen_label_die PROTO((tree, dw_die_ref));
2550 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2551 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2552 static void gen_field_die PROTO((tree, dw_die_ref));
2553 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2554 static void gen_compile_unit_die PROTO((char *));
2555 static void gen_string_type_die PROTO((tree, dw_die_ref));
2556 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2557 static void gen_member_die PROTO((tree, dw_die_ref));
2558 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2559 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2560 static void gen_typedef_die PROTO((tree, dw_die_ref));
2561 static void gen_type_die PROTO((tree, dw_die_ref));
2562 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2563 static void gen_block_die PROTO((tree, dw_die_ref, int));
2564 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2565 static int is_redundant_typedef PROTO((tree));
2566 static void gen_decl_die PROTO((tree, dw_die_ref));
2567 static unsigned lookup_filename PROTO((char *));
2569 /* Section names used to hold DWARF debugging information. */
2570 #ifndef DEBUG_INFO_SECTION
2571 #define DEBUG_INFO_SECTION ".debug_info"
2573 #ifndef ABBREV_SECTION
2574 #define ABBREV_SECTION ".debug_abbrev"
2576 #ifndef ARANGES_SECTION
2577 #define ARANGES_SECTION ".debug_aranges"
2579 #ifndef DW_MACINFO_SECTION
2580 #define DW_MACINFO_SECTION ".debug_macinfo"
2582 #ifndef DEBUG_LINE_SECTION
2583 #define DEBUG_LINE_SECTION ".debug_line"
2586 #define LOC_SECTION ".debug_loc"
2588 #ifndef PUBNAMES_SECTION
2589 #define PUBNAMES_SECTION ".debug_pubnames"
2592 #define STR_SECTION ".debug_str"
2595 /* Standard ELF section names for compiled code and data. */
2596 #ifndef TEXT_SECTION
2597 #define TEXT_SECTION ".text"
2599 #ifndef DATA_SECTION
2600 #define DATA_SECTION ".data"
2603 #define BSS_SECTION ".bss"
2607 /* Definitions of defaults for formats and names of various special
2608 (artificial) labels which may be generated within this file (when the -g
2609 options is used and DWARF_DEBUGGING_INFO is in effect.
2610 If necessary, these may be overridden from within the tm.h file, but
2611 typically, overriding these defaults is unnecessary. */
2613 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2615 #ifndef TEXT_END_LABEL
2616 #define TEXT_END_LABEL "Letext"
2618 #ifndef DATA_END_LABEL
2619 #define DATA_END_LABEL "Ledata"
2621 #ifndef BSS_END_LABEL
2622 #define BSS_END_LABEL "Lebss"
2624 #ifndef INSN_LABEL_FMT
2625 #define INSN_LABEL_FMT "LI%u_"
2627 #ifndef BLOCK_BEGIN_LABEL
2628 #define BLOCK_BEGIN_LABEL "LBB"
2630 #ifndef BLOCK_END_LABEL
2631 #define BLOCK_END_LABEL "LBE"
2633 #ifndef BODY_BEGIN_LABEL
2634 #define BODY_BEGIN_LABEL "Lbb"
2636 #ifndef BODY_END_LABEL
2637 #define BODY_END_LABEL "Lbe"
2639 #ifndef LINE_CODE_LABEL
2640 #define LINE_CODE_LABEL "LM"
2642 #ifndef SEPARATE_LINE_CODE_LABEL
2643 #define SEPARATE_LINE_CODE_LABEL "LSM"
2646 /* Convert a reference to the assembler name of a C-level name. This
2647 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2648 a string rather than writing to a file. */
2649 #ifndef ASM_NAME_TO_STRING
2650 #define ASM_NAME_TO_STRING(STR, NAME) \
2652 if ((NAME)[0] == '*') \
2653 dyn_string_append (STR, NAME + 1); \
2655 dyn_string_append (STR, NAME); \
2660 /* Convert an integer constant expression into assembler syntax. Addition
2661 and subtraction are the only arithmetic that may appear in these
2662 expressions. This is an adaptation of output_addr_const in final.c.
2663 Here, the target of the conversion is a string buffer. We can't use
2664 output_addr_const directly, because it writes to a file. */
2667 addr_const_to_string (str, x)
2674 switch (GET_CODE (x))
2678 dyn_string_append (str, ",");
2684 ASM_NAME_TO_STRING (str, XSTR (x, 0));
2688 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2689 ASM_NAME_TO_STRING (str, buf1);
2693 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2694 ASM_NAME_TO_STRING (str, buf1);
2698 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2699 dyn_string_append (str, buf1);
2703 /* This used to output parentheses around the expression, but that does
2704 not work on the 386 (either ATT or BSD assembler). */
2705 addr_const_to_string (str, XEXP (x, 0));
2709 if (GET_MODE (x) == VOIDmode)
2711 /* We can use %d if the number is one word and positive. */
2712 if (CONST_DOUBLE_HIGH (x))
2713 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2714 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2715 else if (CONST_DOUBLE_LOW (x) < 0)
2716 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2718 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2719 CONST_DOUBLE_LOW (x));
2720 dyn_string_append (str, buf1);
2723 /* We can't handle floating point constants; PRINT_OPERAND must
2725 output_operand_lossage ("floating constant misused");
2729 /* Some assemblers need integer constants to appear last (eg masm). */
2730 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2732 addr_const_to_string (str, XEXP (x, 1));
2733 if (INTVAL (XEXP (x, 0)) >= 0)
2734 dyn_string_append (str, "+");
2736 addr_const_to_string (str, XEXP (x, 0));
2740 addr_const_to_string (str, XEXP (x, 0));
2741 if (INTVAL (XEXP (x, 1)) >= 0)
2742 dyn_string_append (str, "+");
2744 addr_const_to_string (str, XEXP (x, 1));
2749 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2750 can't handle that. */
2751 x = simplify_subtraction (x);
2752 if (GET_CODE (x) != MINUS)
2755 addr_const_to_string (str, XEXP (x, 0));
2756 dyn_string_append (str, "-");
2757 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2758 && INTVAL (XEXP (x, 1)) < 0)
2760 dyn_string_append (str, ASM_OPEN_PAREN);
2761 addr_const_to_string (str, XEXP (x, 1));
2762 dyn_string_append (str, ASM_CLOSE_PAREN);
2765 addr_const_to_string (str, XEXP (x, 1));
2770 addr_const_to_string (str, XEXP (x, 0));
2774 output_operand_lossage ("invalid expression as operand");
2778 /* Convert an address constant to a string, and return a pointer to
2779 a copy of the result, located on the heap. */
2785 dyn_string_t ds = dyn_string_new (256);
2788 addr_const_to_string (ds, x);
2790 /* Return the dynamically allocated string, but free the
2791 dyn_string_t itself. */
2797 /* Test if rtl node points to a pseudo register. */
2803 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2804 || ((GET_CODE (rtl) == SUBREG)
2805 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2808 /* Return a reference to a type, with its const and volatile qualifiers
2812 type_main_variant (type)
2815 type = TYPE_MAIN_VARIANT (type);
2817 /* There really should be only one main variant among any group of variants
2818 of a given type (and all of the MAIN_VARIANT values for all members of
2819 the group should point to that one type) but sometimes the C front-end
2820 messes this up for array types, so we work around that bug here. */
2822 if (TREE_CODE (type) == ARRAY_TYPE)
2823 while (type != TYPE_MAIN_VARIANT (type))
2824 type = TYPE_MAIN_VARIANT (type);
2829 /* Return non-zero if the given type node represents a tagged type. */
2832 is_tagged_type (type)
2835 register enum tree_code code = TREE_CODE (type);
2837 return (code == RECORD_TYPE || code == UNION_TYPE
2838 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2841 /* Convert a DIE tag into its string name. */
2844 dwarf_tag_name (tag)
2845 register unsigned tag;
2849 case DW_TAG_padding:
2850 return "DW_TAG_padding";
2851 case DW_TAG_array_type:
2852 return "DW_TAG_array_type";
2853 case DW_TAG_class_type:
2854 return "DW_TAG_class_type";
2855 case DW_TAG_entry_point:
2856 return "DW_TAG_entry_point";
2857 case DW_TAG_enumeration_type:
2858 return "DW_TAG_enumeration_type";
2859 case DW_TAG_formal_parameter:
2860 return "DW_TAG_formal_parameter";
2861 case DW_TAG_imported_declaration:
2862 return "DW_TAG_imported_declaration";
2864 return "DW_TAG_label";
2865 case DW_TAG_lexical_block:
2866 return "DW_TAG_lexical_block";
2868 return "DW_TAG_member";
2869 case DW_TAG_pointer_type:
2870 return "DW_TAG_pointer_type";
2871 case DW_TAG_reference_type:
2872 return "DW_TAG_reference_type";
2873 case DW_TAG_compile_unit:
2874 return "DW_TAG_compile_unit";
2875 case DW_TAG_string_type:
2876 return "DW_TAG_string_type";
2877 case DW_TAG_structure_type:
2878 return "DW_TAG_structure_type";
2879 case DW_TAG_subroutine_type:
2880 return "DW_TAG_subroutine_type";
2881 case DW_TAG_typedef:
2882 return "DW_TAG_typedef";
2883 case DW_TAG_union_type:
2884 return "DW_TAG_union_type";
2885 case DW_TAG_unspecified_parameters:
2886 return "DW_TAG_unspecified_parameters";
2887 case DW_TAG_variant:
2888 return "DW_TAG_variant";
2889 case DW_TAG_common_block:
2890 return "DW_TAG_common_block";
2891 case DW_TAG_common_inclusion:
2892 return "DW_TAG_common_inclusion";
2893 case DW_TAG_inheritance:
2894 return "DW_TAG_inheritance";
2895 case DW_TAG_inlined_subroutine:
2896 return "DW_TAG_inlined_subroutine";
2898 return "DW_TAG_module";
2899 case DW_TAG_ptr_to_member_type:
2900 return "DW_TAG_ptr_to_member_type";
2901 case DW_TAG_set_type:
2902 return "DW_TAG_set_type";
2903 case DW_TAG_subrange_type:
2904 return "DW_TAG_subrange_type";
2905 case DW_TAG_with_stmt:
2906 return "DW_TAG_with_stmt";
2907 case DW_TAG_access_declaration:
2908 return "DW_TAG_access_declaration";
2909 case DW_TAG_base_type:
2910 return "DW_TAG_base_type";
2911 case DW_TAG_catch_block:
2912 return "DW_TAG_catch_block";
2913 case DW_TAG_const_type:
2914 return "DW_TAG_const_type";
2915 case DW_TAG_constant:
2916 return "DW_TAG_constant";
2917 case DW_TAG_enumerator:
2918 return "DW_TAG_enumerator";
2919 case DW_TAG_file_type:
2920 return "DW_TAG_file_type";
2922 return "DW_TAG_friend";
2923 case DW_TAG_namelist:
2924 return "DW_TAG_namelist";
2925 case DW_TAG_namelist_item:
2926 return "DW_TAG_namelist_item";
2927 case DW_TAG_packed_type:
2928 return "DW_TAG_packed_type";
2929 case DW_TAG_subprogram:
2930 return "DW_TAG_subprogram";
2931 case DW_TAG_template_type_param:
2932 return "DW_TAG_template_type_param";
2933 case DW_TAG_template_value_param:
2934 return "DW_TAG_template_value_param";
2935 case DW_TAG_thrown_type:
2936 return "DW_TAG_thrown_type";
2937 case DW_TAG_try_block:
2938 return "DW_TAG_try_block";
2939 case DW_TAG_variant_part:
2940 return "DW_TAG_variant_part";
2941 case DW_TAG_variable:
2942 return "DW_TAG_variable";
2943 case DW_TAG_volatile_type:
2944 return "DW_TAG_volatile_type";
2945 case DW_TAG_MIPS_loop:
2946 return "DW_TAG_MIPS_loop";
2947 case DW_TAG_format_label:
2948 return "DW_TAG_format_label";
2949 case DW_TAG_function_template:
2950 return "DW_TAG_function_template";
2951 case DW_TAG_class_template:
2952 return "DW_TAG_class_template";
2954 return "DW_TAG_<unknown>";
2958 /* Convert a DWARF attribute code into its string name. */
2961 dwarf_attr_name (attr)
2962 register unsigned attr;
2967 return "DW_AT_sibling";
2968 case DW_AT_location:
2969 return "DW_AT_location";
2971 return "DW_AT_name";
2972 case DW_AT_ordering:
2973 return "DW_AT_ordering";
2974 case DW_AT_subscr_data:
2975 return "DW_AT_subscr_data";
2976 case DW_AT_byte_size:
2977 return "DW_AT_byte_size";
2978 case DW_AT_bit_offset:
2979 return "DW_AT_bit_offset";
2980 case DW_AT_bit_size:
2981 return "DW_AT_bit_size";
2982 case DW_AT_element_list:
2983 return "DW_AT_element_list";
2984 case DW_AT_stmt_list:
2985 return "DW_AT_stmt_list";
2987 return "DW_AT_low_pc";
2989 return "DW_AT_high_pc";
2990 case DW_AT_language:
2991 return "DW_AT_language";
2993 return "DW_AT_member";
2995 return "DW_AT_discr";
2996 case DW_AT_discr_value:
2997 return "DW_AT_discr_value";
2998 case DW_AT_visibility:
2999 return "DW_AT_visibility";
3001 return "DW_AT_import";
3002 case DW_AT_string_length:
3003 return "DW_AT_string_length";
3004 case DW_AT_common_reference:
3005 return "DW_AT_common_reference";
3006 case DW_AT_comp_dir:
3007 return "DW_AT_comp_dir";
3008 case DW_AT_const_value:
3009 return "DW_AT_const_value";
3010 case DW_AT_containing_type:
3011 return "DW_AT_containing_type";
3012 case DW_AT_default_value:
3013 return "DW_AT_default_value";
3015 return "DW_AT_inline";
3016 case DW_AT_is_optional:
3017 return "DW_AT_is_optional";
3018 case DW_AT_lower_bound:
3019 return "DW_AT_lower_bound";
3020 case DW_AT_producer:
3021 return "DW_AT_producer";
3022 case DW_AT_prototyped:
3023 return "DW_AT_prototyped";
3024 case DW_AT_return_addr:
3025 return "DW_AT_return_addr";
3026 case DW_AT_start_scope:
3027 return "DW_AT_start_scope";
3028 case DW_AT_stride_size:
3029 return "DW_AT_stride_size";
3030 case DW_AT_upper_bound:
3031 return "DW_AT_upper_bound";
3032 case DW_AT_abstract_origin:
3033 return "DW_AT_abstract_origin";
3034 case DW_AT_accessibility:
3035 return "DW_AT_accessibility";
3036 case DW_AT_address_class:
3037 return "DW_AT_address_class";
3038 case DW_AT_artificial:
3039 return "DW_AT_artificial";
3040 case DW_AT_base_types:
3041 return "DW_AT_base_types";
3042 case DW_AT_calling_convention:
3043 return "DW_AT_calling_convention";
3045 return "DW_AT_count";
3046 case DW_AT_data_member_location:
3047 return "DW_AT_data_member_location";
3048 case DW_AT_decl_column:
3049 return "DW_AT_decl_column";
3050 case DW_AT_decl_file:
3051 return "DW_AT_decl_file";
3052 case DW_AT_decl_line:
3053 return "DW_AT_decl_line";
3054 case DW_AT_declaration:
3055 return "DW_AT_declaration";
3056 case DW_AT_discr_list:
3057 return "DW_AT_discr_list";
3058 case DW_AT_encoding:
3059 return "DW_AT_encoding";
3060 case DW_AT_external:
3061 return "DW_AT_external";
3062 case DW_AT_frame_base:
3063 return "DW_AT_frame_base";
3065 return "DW_AT_friend";
3066 case DW_AT_identifier_case:
3067 return "DW_AT_identifier_case";
3068 case DW_AT_macro_info:
3069 return "DW_AT_macro_info";
3070 case DW_AT_namelist_items:
3071 return "DW_AT_namelist_items";
3072 case DW_AT_priority:
3073 return "DW_AT_priority";
3075 return "DW_AT_segment";
3076 case DW_AT_specification:
3077 return "DW_AT_specification";
3078 case DW_AT_static_link:
3079 return "DW_AT_static_link";
3081 return "DW_AT_type";
3082 case DW_AT_use_location:
3083 return "DW_AT_use_location";
3084 case DW_AT_variable_parameter:
3085 return "DW_AT_variable_parameter";
3086 case DW_AT_virtuality:
3087 return "DW_AT_virtuality";
3088 case DW_AT_vtable_elem_location:
3089 return "DW_AT_vtable_elem_location";
3091 case DW_AT_MIPS_fde:
3092 return "DW_AT_MIPS_fde";
3093 case DW_AT_MIPS_loop_begin:
3094 return "DW_AT_MIPS_loop_begin";
3095 case DW_AT_MIPS_tail_loop_begin:
3096 return "DW_AT_MIPS_tail_loop_begin";
3097 case DW_AT_MIPS_epilog_begin:
3098 return "DW_AT_MIPS_epilog_begin";
3099 case DW_AT_MIPS_loop_unroll_factor:
3100 return "DW_AT_MIPS_loop_unroll_factor";
3101 case DW_AT_MIPS_software_pipeline_depth:
3102 return "DW_AT_MIPS_software_pipeline_depth";
3103 case DW_AT_MIPS_linkage_name:
3104 return "DW_AT_MIPS_linkage_name";
3105 case DW_AT_MIPS_stride:
3106 return "DW_AT_MIPS_stride";
3107 case DW_AT_MIPS_abstract_name:
3108 return "DW_AT_MIPS_abstract_name";
3109 case DW_AT_MIPS_clone_origin:
3110 return "DW_AT_MIPS_clone_origin";
3111 case DW_AT_MIPS_has_inlines:
3112 return "DW_AT_MIPS_has_inlines";
3114 case DW_AT_sf_names:
3115 return "DW_AT_sf_names";
3116 case DW_AT_src_info:
3117 return "DW_AT_src_info";
3118 case DW_AT_mac_info:
3119 return "DW_AT_mac_info";
3120 case DW_AT_src_coords:
3121 return "DW_AT_src_coords";
3122 case DW_AT_body_begin:
3123 return "DW_AT_body_begin";
3124 case DW_AT_body_end:
3125 return "DW_AT_body_end";
3127 return "DW_AT_<unknown>";
3131 /* Convert a DWARF value form code into its string name. */
3134 dwarf_form_name (form)
3135 register unsigned form;
3140 return "DW_FORM_addr";
3141 case DW_FORM_block2:
3142 return "DW_FORM_block2";
3143 case DW_FORM_block4:
3144 return "DW_FORM_block4";
3146 return "DW_FORM_data2";
3148 return "DW_FORM_data4";
3150 return "DW_FORM_data8";
3151 case DW_FORM_string:
3152 return "DW_FORM_string";
3154 return "DW_FORM_block";
3155 case DW_FORM_block1:
3156 return "DW_FORM_block1";
3158 return "DW_FORM_data1";
3160 return "DW_FORM_flag";
3162 return "DW_FORM_sdata";
3164 return "DW_FORM_strp";
3166 return "DW_FORM_udata";
3167 case DW_FORM_ref_addr:
3168 return "DW_FORM_ref_addr";
3170 return "DW_FORM_ref1";
3172 return "DW_FORM_ref2";
3174 return "DW_FORM_ref4";
3176 return "DW_FORM_ref8";
3177 case DW_FORM_ref_udata:
3178 return "DW_FORM_ref_udata";
3179 case DW_FORM_indirect:
3180 return "DW_FORM_indirect";
3182 return "DW_FORM_<unknown>";
3186 /* Convert a DWARF stack opcode into its string name. */
3189 dwarf_stack_op_name (op)
3190 register unsigned op;
3195 return "DW_OP_addr";
3197 return "DW_OP_deref";
3199 return "DW_OP_const1u";
3201 return "DW_OP_const1s";
3203 return "DW_OP_const2u";
3205 return "DW_OP_const2s";
3207 return "DW_OP_const4u";
3209 return "DW_OP_const4s";
3211 return "DW_OP_const8u";
3213 return "DW_OP_const8s";
3215 return "DW_OP_constu";
3217 return "DW_OP_consts";
3221 return "DW_OP_drop";
3223 return "DW_OP_over";
3225 return "DW_OP_pick";
3227 return "DW_OP_swap";
3231 return "DW_OP_xderef";
3239 return "DW_OP_minus";
3251 return "DW_OP_plus";
3252 case DW_OP_plus_uconst:
3253 return "DW_OP_plus_uconst";
3259 return "DW_OP_shra";
3277 return "DW_OP_skip";
3279 return "DW_OP_lit0";
3281 return "DW_OP_lit1";
3283 return "DW_OP_lit2";
3285 return "DW_OP_lit3";
3287 return "DW_OP_lit4";
3289 return "DW_OP_lit5";
3291 return "DW_OP_lit6";
3293 return "DW_OP_lit7";
3295 return "DW_OP_lit8";
3297 return "DW_OP_lit9";
3299 return "DW_OP_lit10";
3301 return "DW_OP_lit11";
3303 return "DW_OP_lit12";
3305 return "DW_OP_lit13";
3307 return "DW_OP_lit14";
3309 return "DW_OP_lit15";
3311 return "DW_OP_lit16";
3313 return "DW_OP_lit17";
3315 return "DW_OP_lit18";
3317 return "DW_OP_lit19";
3319 return "DW_OP_lit20";
3321 return "DW_OP_lit21";
3323 return "DW_OP_lit22";
3325 return "DW_OP_lit23";
3327 return "DW_OP_lit24";
3329 return "DW_OP_lit25";
3331 return "DW_OP_lit26";
3333 return "DW_OP_lit27";
3335 return "DW_OP_lit28";
3337 return "DW_OP_lit29";
3339 return "DW_OP_lit30";
3341 return "DW_OP_lit31";
3343 return "DW_OP_reg0";
3345 return "DW_OP_reg1";
3347 return "DW_OP_reg2";
3349 return "DW_OP_reg3";
3351 return "DW_OP_reg4";
3353 return "DW_OP_reg5";
3355 return "DW_OP_reg6";
3357 return "DW_OP_reg7";
3359 return "DW_OP_reg8";
3361 return "DW_OP_reg9";
3363 return "DW_OP_reg10";
3365 return "DW_OP_reg11";
3367 return "DW_OP_reg12";
3369 return "DW_OP_reg13";
3371 return "DW_OP_reg14";
3373 return "DW_OP_reg15";
3375 return "DW_OP_reg16";
3377 return "DW_OP_reg17";
3379 return "DW_OP_reg18";
3381 return "DW_OP_reg19";
3383 return "DW_OP_reg20";
3385 return "DW_OP_reg21";
3387 return "DW_OP_reg22";
3389 return "DW_OP_reg23";
3391 return "DW_OP_reg24";
3393 return "DW_OP_reg25";
3395 return "DW_OP_reg26";
3397 return "DW_OP_reg27";
3399 return "DW_OP_reg28";
3401 return "DW_OP_reg29";
3403 return "DW_OP_reg30";
3405 return "DW_OP_reg31";
3407 return "DW_OP_breg0";
3409 return "DW_OP_breg1";
3411 return "DW_OP_breg2";
3413 return "DW_OP_breg3";
3415 return "DW_OP_breg4";
3417 return "DW_OP_breg5";
3419 return "DW_OP_breg6";
3421 return "DW_OP_breg7";
3423 return "DW_OP_breg8";
3425 return "DW_OP_breg9";
3427 return "DW_OP_breg10";
3429 return "DW_OP_breg11";
3431 return "DW_OP_breg12";
3433 return "DW_OP_breg13";
3435 return "DW_OP_breg14";
3437 return "DW_OP_breg15";
3439 return "DW_OP_breg16";
3441 return "DW_OP_breg17";
3443 return "DW_OP_breg18";
3445 return "DW_OP_breg19";
3447 return "DW_OP_breg20";
3449 return "DW_OP_breg21";
3451 return "DW_OP_breg22";
3453 return "DW_OP_breg23";
3455 return "DW_OP_breg24";
3457 return "DW_OP_breg25";
3459 return "DW_OP_breg26";
3461 return "DW_OP_breg27";
3463 return "DW_OP_breg28";
3465 return "DW_OP_breg29";
3467 return "DW_OP_breg30";
3469 return "DW_OP_breg31";
3471 return "DW_OP_regx";
3473 return "DW_OP_fbreg";
3475 return "DW_OP_bregx";
3477 return "DW_OP_piece";
3478 case DW_OP_deref_size:
3479 return "DW_OP_deref_size";
3480 case DW_OP_xderef_size:
3481 return "DW_OP_xderef_size";
3485 return "OP_<unknown>";
3489 /* Convert a DWARF type code into its string name. */
3493 dwarf_type_encoding_name (enc)
3494 register unsigned enc;
3498 case DW_ATE_address:
3499 return "DW_ATE_address";
3500 case DW_ATE_boolean:
3501 return "DW_ATE_boolean";
3502 case DW_ATE_complex_float:
3503 return "DW_ATE_complex_float";
3505 return "DW_ATE_float";
3507 return "DW_ATE_signed";
3508 case DW_ATE_signed_char:
3509 return "DW_ATE_signed_char";
3510 case DW_ATE_unsigned:
3511 return "DW_ATE_unsigned";
3512 case DW_ATE_unsigned_char:
3513 return "DW_ATE_unsigned_char";
3515 return "DW_ATE_<unknown>";
3520 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3521 instance of an inlined instance of a decl which is local to an inline
3522 function, so we have to trace all of the way back through the origin chain
3523 to find out what sort of node actually served as the original seed for the
3527 decl_ultimate_origin (decl)
3530 register tree immediate_origin = DECL_ABSTRACT_ORIGIN (decl);
3532 if (immediate_origin == NULL_TREE)
3536 register tree ret_val;
3537 register tree lookahead = immediate_origin;
3541 ret_val = lookahead;
3542 lookahead = DECL_ABSTRACT_ORIGIN (ret_val);
3544 while (lookahead != NULL && lookahead != ret_val);
3550 /* Determine the "ultimate origin" of a block. The block may be an inlined
3551 instance of an inlined instance of a block which is local to an inline
3552 function, so we have to trace all of the way back through the origin chain
3553 to find out what sort of node actually served as the original seed for the
3557 block_ultimate_origin (block)
3558 register tree block;
3560 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3562 if (immediate_origin == NULL_TREE)
3566 register tree ret_val;
3567 register tree lookahead = immediate_origin;
3571 ret_val = lookahead;
3572 lookahead = (TREE_CODE (ret_val) == BLOCK)
3573 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3576 while (lookahead != NULL && lookahead != ret_val);
3582 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3583 of a virtual function may refer to a base class, so we check the 'this'
3587 decl_class_context (decl)
3590 tree context = NULL_TREE;
3592 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3593 context = DECL_CONTEXT (decl);
3595 context = TYPE_MAIN_VARIANT
3596 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3598 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3599 context = NULL_TREE;
3604 /* Add an attribute/value pair to a DIE */
3607 add_dwarf_attr (die, attr)
3608 register dw_die_ref die;
3609 register dw_attr_ref attr;
3611 if (die != NULL && attr != NULL)
3613 if (die->die_attr == NULL)
3615 die->die_attr = attr;
3616 die->die_attr_last = attr;
3620 die->die_attr_last->dw_attr_next = attr;
3621 die->die_attr_last = attr;
3626 /* Add a flag value attribute to a DIE. */
3629 add_AT_flag (die, attr_kind, flag)
3630 register dw_die_ref die;
3631 register enum dwarf_attribute attr_kind;
3632 register unsigned flag;
3634 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3636 attr->dw_attr_next = NULL;
3637 attr->dw_attr = attr_kind;
3638 attr->dw_attr_val.val_class = dw_val_class_flag;
3639 attr->dw_attr_val.v.val_flag = flag;
3640 add_dwarf_attr (die, attr);
3643 /* Add a signed integer attribute value to a DIE. */
3646 add_AT_int (die, attr_kind, int_val)
3647 register dw_die_ref die;
3648 register enum dwarf_attribute attr_kind;
3649 register long int int_val;
3651 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3653 attr->dw_attr_next = NULL;
3654 attr->dw_attr = attr_kind;
3655 attr->dw_attr_val.val_class = dw_val_class_const;
3656 attr->dw_attr_val.v.val_int = int_val;
3657 add_dwarf_attr (die, attr);
3660 /* Add an unsigned integer attribute value to a DIE. */
3663 add_AT_unsigned (die, attr_kind, unsigned_val)
3664 register dw_die_ref die;
3665 register enum dwarf_attribute attr_kind;
3666 register unsigned long unsigned_val;
3668 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3670 attr->dw_attr_next = NULL;
3671 attr->dw_attr = attr_kind;
3672 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
3673 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3674 add_dwarf_attr (die, attr);
3677 /* Add an unsigned double integer attribute value to a DIE. */
3680 add_AT_long_long (die, attr_kind, val_hi, val_low)
3681 register dw_die_ref die;
3682 register enum dwarf_attribute attr_kind;
3683 register unsigned long val_hi;
3684 register unsigned long val_low;
3686 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3688 attr->dw_attr_next = NULL;
3689 attr->dw_attr = attr_kind;
3690 attr->dw_attr_val.val_class = dw_val_class_long_long;
3691 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3692 attr->dw_attr_val.v.val_long_long.low = val_low;
3693 add_dwarf_attr (die, attr);
3696 /* Add a floating point attribute value to a DIE and return it. */
3699 add_AT_float (die, attr_kind, length, array)
3700 register dw_die_ref die;
3701 register enum dwarf_attribute attr_kind;
3702 register unsigned length;
3703 register long *array;
3705 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3707 attr->dw_attr_next = NULL;
3708 attr->dw_attr = attr_kind;
3709 attr->dw_attr_val.val_class = dw_val_class_float;
3710 attr->dw_attr_val.v.val_float.length = length;
3711 attr->dw_attr_val.v.val_float.array = array;
3712 add_dwarf_attr (die, attr);
3715 /* Add a string attribute value to a DIE. */
3718 add_AT_string (die, attr_kind, str)
3719 register dw_die_ref die;
3720 register enum dwarf_attribute attr_kind;
3723 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3725 attr->dw_attr_next = NULL;
3726 attr->dw_attr = attr_kind;
3727 attr->dw_attr_val.val_class = dw_val_class_str;
3728 attr->dw_attr_val.v.val_str = xstrdup (str);
3729 add_dwarf_attr (die, attr);
3732 /* Add a DIE reference attribute value to a DIE. */
3735 add_AT_die_ref (die, attr_kind, targ_die)
3736 register dw_die_ref die;
3737 register enum dwarf_attribute attr_kind;
3738 register dw_die_ref targ_die;
3740 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3742 attr->dw_attr_next = NULL;
3743 attr->dw_attr = attr_kind;
3744 attr->dw_attr_val.val_class = dw_val_class_die_ref;
3745 attr->dw_attr_val.v.val_die_ref = targ_die;
3746 add_dwarf_attr (die, attr);
3749 /* Add an FDE reference attribute value to a DIE. */
3752 add_AT_fde_ref (die, attr_kind, targ_fde)
3753 register dw_die_ref die;
3754 register enum dwarf_attribute attr_kind;
3755 register unsigned targ_fde;
3757 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3759 attr->dw_attr_next = NULL;
3760 attr->dw_attr = attr_kind;
3761 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
3762 attr->dw_attr_val.v.val_fde_index = targ_fde;
3763 add_dwarf_attr (die, attr);
3766 /* Add a location description attribute value to a DIE. */
3769 add_AT_loc (die, attr_kind, loc)
3770 register dw_die_ref die;
3771 register enum dwarf_attribute attr_kind;
3772 register dw_loc_descr_ref loc;
3774 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3776 attr->dw_attr_next = NULL;
3777 attr->dw_attr = attr_kind;
3778 attr->dw_attr_val.val_class = dw_val_class_loc;
3779 attr->dw_attr_val.v.val_loc = loc;
3780 add_dwarf_attr (die, attr);
3783 /* Add an address constant attribute value to a DIE. */
3786 add_AT_addr (die, attr_kind, addr)
3787 register dw_die_ref die;
3788 register enum dwarf_attribute attr_kind;
3791 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3793 attr->dw_attr_next = NULL;
3794 attr->dw_attr = attr_kind;
3795 attr->dw_attr_val.val_class = dw_val_class_addr;
3796 attr->dw_attr_val.v.val_addr = addr;
3797 add_dwarf_attr (die, attr);
3800 /* Add a label identifier attribute value to a DIE. */
3803 add_AT_lbl_id (die, attr_kind, lbl_id)
3804 register dw_die_ref die;
3805 register enum dwarf_attribute attr_kind;
3806 register char *lbl_id;
3808 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3810 attr->dw_attr_next = NULL;
3811 attr->dw_attr = attr_kind;
3812 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3813 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3814 add_dwarf_attr (die, attr);
3817 /* Add a section offset attribute value to a DIE. */
3820 add_AT_section_offset (die, attr_kind, section)
3821 register dw_die_ref die;
3822 register enum dwarf_attribute attr_kind;
3823 register char *section;
3825 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3827 attr->dw_attr_next = NULL;
3828 attr->dw_attr = attr_kind;
3829 attr->dw_attr_val.val_class = dw_val_class_section_offset;
3830 attr->dw_attr_val.v.val_section = section;
3831 add_dwarf_attr (die, attr);
3835 /* Test if die refers to an external subroutine. */
3838 is_extern_subr_die (die)
3839 register dw_die_ref die;
3841 register dw_attr_ref a;
3842 register int is_subr = FALSE;
3843 register int is_extern = FALSE;
3845 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3848 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3850 if (a->dw_attr == DW_AT_external
3851 && a->dw_attr_val.val_class == dw_val_class_flag
3852 && a->dw_attr_val.v.val_flag != 0)
3860 return is_subr && is_extern;
3863 /* Get the attribute of type attr_kind. */
3865 static inline dw_attr_ref
3866 get_AT (die, attr_kind)
3867 register dw_die_ref die;
3868 register enum dwarf_attribute attr_kind;
3870 register dw_attr_ref a;
3871 register dw_die_ref spec = NULL;
3875 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3877 if (a->dw_attr == attr_kind)
3880 if (a->dw_attr == DW_AT_specification
3881 || a->dw_attr == DW_AT_abstract_origin)
3882 spec = a->dw_attr_val.v.val_die_ref;
3886 return get_AT (spec, attr_kind);
3892 /* Return the "low pc" attribute value, typically associated with
3893 a subprogram DIE. Return null if the "low pc" attribute is
3894 either not prsent, or if it cannot be represented as an
3895 assembler label identifier. */
3897 static inline char *
3899 register dw_die_ref die;
3901 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3903 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3904 return a->dw_attr_val.v.val_lbl_id;
3909 /* Return the "high pc" attribute value, typically associated with
3910 a subprogram DIE. Return null if the "high pc" attribute is
3911 either not prsent, or if it cannot be represented as an
3912 assembler label identifier. */
3914 static inline char *
3916 register dw_die_ref die;
3918 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
3920 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3921 return a->dw_attr_val.v.val_lbl_id;
3926 /* Return the value of the string attribute designated by ATTR_KIND, or
3927 NULL if it is not present. */
3929 static inline char *
3930 get_AT_string (die, attr_kind)
3931 register dw_die_ref die;
3932 register enum dwarf_attribute attr_kind;
3934 register dw_attr_ref a = get_AT (die, attr_kind);
3936 if (a && a->dw_attr_val.val_class == dw_val_class_str)
3937 return a->dw_attr_val.v.val_str;
3942 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3943 if it is not present. */
3946 get_AT_flag (die, attr_kind)
3947 register dw_die_ref die;
3948 register enum dwarf_attribute attr_kind;
3950 register dw_attr_ref a = get_AT (die, attr_kind);
3952 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
3953 return a->dw_attr_val.v.val_flag;
3958 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3959 if it is not present. */
3961 static inline unsigned
3962 get_AT_unsigned (die, attr_kind)
3963 register dw_die_ref die;
3964 register enum dwarf_attribute attr_kind;
3966 register dw_attr_ref a = get_AT (die, attr_kind);
3968 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
3969 return a->dw_attr_val.v.val_unsigned;
3977 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3979 return (lang == DW_LANG_C || lang == DW_LANG_C89
3980 || lang == DW_LANG_C_plus_plus);
3986 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3988 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
3991 /* Remove the specified attribute if present. */
3994 remove_AT (die, attr_kind)
3995 register dw_die_ref die;
3996 register enum dwarf_attribute attr_kind;
3998 register dw_attr_ref a;
3999 register dw_attr_ref removed = NULL;;
4003 if (die->die_attr->dw_attr == attr_kind)
4005 removed = die->die_attr;
4006 if (die->die_attr_last == die->die_attr)
4007 die->die_attr_last = NULL;
4009 die->die_attr = die->die_attr->dw_attr_next;
4013 for (a = die->die_attr; a->dw_attr_next != NULL;
4014 a = a->dw_attr_next)
4015 if (a->dw_attr_next->dw_attr == attr_kind)
4017 removed = a->dw_attr_next;
4018 if (die->die_attr_last == a->dw_attr_next)
4019 die->die_attr_last = a;
4021 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4030 /* Discard the children of this DIE. */
4033 remove_children (die)
4034 register dw_die_ref die;
4036 register dw_die_ref child_die = die->die_child;
4038 die->die_child = NULL;
4039 die->die_child_last = NULL;
4041 while (child_die != NULL)
4043 register dw_die_ref tmp_die = child_die;
4044 register dw_attr_ref a;
4046 child_die = child_die->die_sib;
4048 for (a = tmp_die->die_attr; a != NULL; )
4050 register dw_attr_ref tmp_a = a;
4052 a = a->dw_attr_next;
4060 /* Add a child DIE below its parent. */
4063 add_child_die (die, child_die)
4064 register dw_die_ref die;
4065 register dw_die_ref child_die;
4067 if (die != NULL && child_die != NULL)
4069 if (die == child_die)
4071 child_die->die_parent = die;
4072 child_die->die_sib = NULL;
4074 if (die->die_child == NULL)
4076 die->die_child = child_die;
4077 die->die_child_last = child_die;
4081 die->die_child_last->die_sib = child_die;
4082 die->die_child_last = child_die;
4087 /* Return a pointer to a newly created DIE node. */
4089 static inline dw_die_ref
4090 new_die (tag_value, parent_die)
4091 register enum dwarf_tag tag_value;
4092 register dw_die_ref parent_die;
4094 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4096 die->die_tag = tag_value;
4097 die->die_abbrev = 0;
4098 die->die_offset = 0;
4099 die->die_child = NULL;
4100 die->die_parent = NULL;
4101 die->die_sib = NULL;
4102 die->die_child_last = NULL;
4103 die->die_attr = NULL;
4104 die->die_attr_last = NULL;
4106 if (parent_die != NULL)
4107 add_child_die (parent_die, die);
4110 limbo_die_node *limbo_node;
4112 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4113 limbo_node->die = die;
4114 limbo_node->next = limbo_die_list;
4115 limbo_die_list = limbo_node;
4121 /* Return the DIE associated with the given type specifier. */
4123 static inline dw_die_ref
4124 lookup_type_die (type)
4127 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4130 /* Equate a DIE to a given type specifier. */
4133 equate_type_number_to_die (type, type_die)
4135 register dw_die_ref type_die;
4137 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4140 /* Return the DIE associated with a given declaration. */
4142 static inline dw_die_ref
4143 lookup_decl_die (decl)
4146 register unsigned decl_id = DECL_UID (decl);
4148 return (decl_id < decl_die_table_in_use
4149 ? decl_die_table[decl_id] : NULL);
4152 /* Equate a DIE to a particular declaration. */
4155 equate_decl_number_to_die (decl, decl_die)
4157 register dw_die_ref decl_die;
4159 register unsigned decl_id = DECL_UID (decl);
4160 register unsigned num_allocated;
4162 if (decl_id >= decl_die_table_allocated)
4165 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4166 / DECL_DIE_TABLE_INCREMENT)
4167 * DECL_DIE_TABLE_INCREMENT;
4170 = (dw_die_ref *) xrealloc (decl_die_table,
4171 sizeof (dw_die_ref) * num_allocated);
4173 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4174 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4175 decl_die_table_allocated = num_allocated;
4178 if (decl_id >= decl_die_table_in_use)
4179 decl_die_table_in_use = (decl_id + 1);
4181 decl_die_table[decl_id] = decl_die;
4184 /* Return a pointer to a newly allocated location description. Location
4185 descriptions are simple expression terms that can be strung
4186 together to form more complicated location (address) descriptions. */
4188 static inline dw_loc_descr_ref
4189 new_loc_descr (op, oprnd1, oprnd2)
4190 register enum dwarf_location_atom op;
4191 register unsigned long oprnd1;
4192 register unsigned long oprnd2;
4194 register dw_loc_descr_ref descr
4195 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4197 descr->dw_loc_next = NULL;
4198 descr->dw_loc_opc = op;
4199 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4200 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4201 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4202 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4207 /* Add a location description term to a location description expression. */
4210 add_loc_descr (list_head, descr)
4211 register dw_loc_descr_ref *list_head;
4212 register dw_loc_descr_ref descr;
4214 register dw_loc_descr_ref *d;
4216 /* Find the end of the chain. */
4217 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4223 /* Keep track of the number of spaces used to indent the
4224 output of the debugging routines that print the structure of
4225 the DIE internal representation. */
4226 static int print_indent;
4228 /* Indent the line the number of spaces given by print_indent. */
4231 print_spaces (outfile)
4234 fprintf (outfile, "%*s", print_indent, "");
4237 /* Print the information associated with a given DIE, and its children.
4238 This routine is a debugging aid only. */
4241 print_die (die, outfile)
4245 register dw_attr_ref a;
4246 register dw_die_ref c;
4248 print_spaces (outfile);
4249 fprintf (outfile, "DIE %4lu: %s\n",
4250 die->die_offset, dwarf_tag_name (die->die_tag));
4251 print_spaces (outfile);
4252 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4253 fprintf (outfile, " offset: %lu\n", die->die_offset);
4255 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4257 print_spaces (outfile);
4258 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4260 switch (a->dw_attr_val.val_class)
4262 case dw_val_class_addr:
4263 fprintf (outfile, "address");
4265 case dw_val_class_loc:
4266 fprintf (outfile, "location descriptor");
4268 case dw_val_class_const:
4269 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4271 case dw_val_class_unsigned_const:
4272 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4274 case dw_val_class_long_long:
4275 fprintf (outfile, "constant (%lu,%lu)",
4276 a->dw_attr_val.v.val_long_long.hi,
4277 a->dw_attr_val.v.val_long_long.low);
4279 case dw_val_class_float:
4280 fprintf (outfile, "floating-point constant");
4282 case dw_val_class_flag:
4283 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4285 case dw_val_class_die_ref:
4286 if (a->dw_attr_val.v.val_die_ref != NULL)
4287 fprintf (outfile, "die -> %lu",
4288 a->dw_attr_val.v.val_die_ref->die_offset);
4290 fprintf (outfile, "die -> <null>");
4292 case dw_val_class_lbl_id:
4293 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4295 case dw_val_class_section_offset:
4296 fprintf (outfile, "section: %s", a->dw_attr_val.v.val_section);
4298 case dw_val_class_str:
4299 if (a->dw_attr_val.v.val_str != NULL)
4300 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4302 fprintf (outfile, "<null>");
4308 fprintf (outfile, "\n");
4311 if (die->die_child != NULL)
4314 for (c = die->die_child; c != NULL; c = c->die_sib)
4315 print_die (c, outfile);
4321 /* Print the contents of the source code line number correspondence table.
4322 This routine is a debugging aid only. */
4325 print_dwarf_line_table (outfile)
4328 register unsigned i;
4329 register dw_line_info_ref line_info;
4331 fprintf (outfile, "\n\nDWARF source line information\n");
4332 for (i = 1; i < line_info_table_in_use; ++i)
4334 line_info = &line_info_table[i];
4335 fprintf (outfile, "%5d: ", i);
4336 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4337 fprintf (outfile, "%6ld", line_info->dw_line_num);
4338 fprintf (outfile, "\n");
4341 fprintf (outfile, "\n\n");
4344 /* Print the information collected for a given DIE. */
4347 debug_dwarf_die (die)
4350 print_die (die, stderr);
4353 /* Print all DWARF information collected for the compilation unit.
4354 This routine is a debugging aid only. */
4360 print_die (comp_unit_die, stderr);
4361 print_dwarf_line_table (stderr);
4364 /* Traverse the DIE, and add a sibling attribute if it may have the
4365 effect of speeding up access to siblings. To save some space,
4366 avoid generating sibling attributes for DIE's without children. */
4369 add_sibling_attributes(die)
4370 register dw_die_ref die;
4372 register dw_die_ref c;
4373 register dw_attr_ref attr;
4374 if (die != comp_unit_die && die->die_child != NULL)
4376 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4377 attr->dw_attr_next = NULL;
4378 attr->dw_attr = DW_AT_sibling;
4379 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4380 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4382 /* Add the sibling link to the front of the attribute list. */
4383 attr->dw_attr_next = die->die_attr;
4384 if (die->die_attr == NULL)
4385 die->die_attr_last = attr;
4387 die->die_attr = attr;
4390 for (c = die->die_child; c != NULL; c = c->die_sib)
4391 add_sibling_attributes (c);
4394 /* The format of each DIE (and its attribute value pairs)
4395 is encoded in an abbreviation table. This routine builds the
4396 abbreviation table and assigns a unique abbreviation id for
4397 each abbreviation entry. The children of each die are visited
4401 build_abbrev_table (die)
4402 register dw_die_ref die;
4404 register unsigned long abbrev_id;
4405 register unsigned long n_alloc;
4406 register dw_die_ref c;
4407 register dw_attr_ref d_attr, a_attr;
4408 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4410 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4412 if (abbrev->die_tag == die->die_tag)
4414 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4416 a_attr = abbrev->die_attr;
4417 d_attr = die->die_attr;
4419 while (a_attr != NULL && d_attr != NULL)
4421 if ((a_attr->dw_attr != d_attr->dw_attr)
4422 || (value_format (&a_attr->dw_attr_val)
4423 != value_format (&d_attr->dw_attr_val)))
4426 a_attr = a_attr->dw_attr_next;
4427 d_attr = d_attr->dw_attr_next;
4430 if (a_attr == NULL && d_attr == NULL)
4436 if (abbrev_id >= abbrev_die_table_in_use)
4438 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4440 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4442 = (dw_die_ref *) xrealloc (abbrev_die_table,
4443 sizeof (dw_die_ref) * n_alloc);
4445 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4446 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4447 abbrev_die_table_allocated = n_alloc;
4450 ++abbrev_die_table_in_use;
4451 abbrev_die_table[abbrev_id] = die;
4454 die->die_abbrev = abbrev_id;
4455 for (c = die->die_child; c != NULL; c = c->die_sib)
4456 build_abbrev_table (c);
4459 /* Return the size of a string, including the null byte.
4461 This used to treat backslashes as escapes, and hence they were not included
4462 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
4463 which treats a backslash as a backslash, escaping it if necessary, and hence
4464 we must include them in the count. */
4466 static unsigned long
4467 size_of_string (str)
4470 return strlen (str) + 1;
4473 /* Return the size of a location descriptor. */
4475 static unsigned long
4476 size_of_loc_descr (loc)
4477 register dw_loc_descr_ref loc;
4479 register unsigned long size = 1;
4481 switch (loc->dw_loc_opc)
4503 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4506 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4511 case DW_OP_plus_uconst:
4512 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4550 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4553 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4556 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4559 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4560 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4563 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4565 case DW_OP_deref_size:
4566 case DW_OP_xderef_size:
4576 /* Return the size of a series of location descriptors. */
4578 static unsigned long
4580 register dw_loc_descr_ref loc;
4582 register unsigned long size = 0;
4584 for (; loc != NULL; loc = loc->dw_loc_next)
4585 size += size_of_loc_descr (loc);
4590 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4593 constant_size (value)
4594 long unsigned value;
4601 log = floor_log2 (value);
4604 log = 1 << (floor_log2 (log) + 1);
4609 /* Return the size of a DIE, as it is represented in the
4610 .debug_info section. */
4612 static unsigned long
4614 register dw_die_ref die;
4616 register unsigned long size = 0;
4617 register dw_attr_ref a;
4619 size += size_of_uleb128 (die->die_abbrev);
4620 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4622 switch (a->dw_attr_val.val_class)
4624 case dw_val_class_addr:
4627 case dw_val_class_loc:
4629 register unsigned long lsize
4630 = size_of_locs (a->dw_attr_val.v.val_loc);
4633 size += constant_size (lsize);
4637 case dw_val_class_const:
4640 case dw_val_class_unsigned_const:
4641 size += constant_size (a->dw_attr_val.v.val_unsigned);
4643 case dw_val_class_long_long:
4644 size += 1 + 8; /* block */
4646 case dw_val_class_float:
4647 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4649 case dw_val_class_flag:
4652 case dw_val_class_die_ref:
4653 size += DWARF_OFFSET_SIZE;
4655 case dw_val_class_fde_ref:
4656 size += DWARF_OFFSET_SIZE;
4658 case dw_val_class_lbl_id:
4661 case dw_val_class_section_offset:
4662 size += DWARF_OFFSET_SIZE;
4664 case dw_val_class_str:
4665 size += size_of_string (a->dw_attr_val.v.val_str);
4675 /* Size the debugging information associated with a given DIE.
4676 Visits the DIE's children recursively. Updates the global
4677 variable next_die_offset, on each time through. Uses the
4678 current value of next_die_offset to update the die_offset
4679 field in each DIE. */
4682 calc_die_sizes (die)
4685 register dw_die_ref c;
4686 die->die_offset = next_die_offset;
4687 next_die_offset += size_of_die (die);
4689 for (c = die->die_child; c != NULL; c = c->die_sib)
4692 if (die->die_child != NULL)
4693 /* Count the null byte used to terminate sibling lists. */
4694 next_die_offset += 1;
4697 /* Return the size of the line information prolog generated for the
4698 compilation unit. */
4700 static unsigned long
4701 size_of_line_prolog ()
4703 register unsigned long size;
4704 register unsigned long ft_index;
4706 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4708 /* Count the size of the table giving number of args for each
4710 size += DWARF_LINE_OPCODE_BASE - 1;
4712 /* Include directory table is empty (at present). Count only the
4713 null byte used to terminate the table. */
4716 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4718 /* File name entry. */
4719 size += size_of_string (file_table[ft_index]);
4721 /* Include directory index. */
4722 size += size_of_uleb128 (0);
4724 /* Modification time. */
4725 size += size_of_uleb128 (0);
4727 /* File length in bytes. */
4728 size += size_of_uleb128 (0);
4731 /* Count the file table terminator. */
4736 /* Return the size of the line information generated for this
4737 compilation unit. */
4739 static unsigned long
4740 size_of_line_info ()
4742 register unsigned long size;
4743 register unsigned long lt_index;
4744 register unsigned long current_line;
4745 register long line_offset;
4746 register long line_delta;
4747 register unsigned long current_file;
4748 register unsigned long function;
4749 unsigned long size_of_set_address;
4751 /* Size of a DW_LNE_set_address instruction. */
4752 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4754 /* Version number. */
4757 /* Prolog length specifier. */
4758 size += DWARF_OFFSET_SIZE;
4761 size += size_of_line_prolog ();
4763 /* Set address register instruction. */
4764 size += size_of_set_address;
4768 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4770 register dw_line_info_ref line_info;
4772 /* Advance pc instruction. */
4773 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4777 size += size_of_set_address;
4779 line_info = &line_info_table[lt_index];
4780 if (line_info->dw_file_num != current_file)
4782 /* Set file number instruction. */
4784 current_file = line_info->dw_file_num;
4785 size += size_of_uleb128 (current_file);
4788 if (line_info->dw_line_num != current_line)
4790 line_offset = line_info->dw_line_num - current_line;
4791 line_delta = line_offset - DWARF_LINE_BASE;
4792 current_line = line_info->dw_line_num;
4793 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4794 /* 1-byte special line number instruction. */
4798 /* Advance line instruction. */
4800 size += size_of_sleb128 (line_offset);
4801 /* Generate line entry instruction. */
4807 /* Advance pc instruction. */
4811 size += size_of_set_address;
4813 /* End of line number info. marker. */
4814 size += 1 + size_of_uleb128 (1) + 1;
4819 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4821 register dw_separate_line_info_ref line_info
4822 = &separate_line_info_table[lt_index];
4823 if (function != line_info->function)
4825 function = line_info->function;
4826 /* Set address register instruction. */
4827 size += size_of_set_address;
4831 /* Advance pc instruction. */
4835 size += size_of_set_address;
4838 if (line_info->dw_file_num != current_file)
4840 /* Set file number instruction. */
4842 current_file = line_info->dw_file_num;
4843 size += size_of_uleb128 (current_file);
4846 if (line_info->dw_line_num != current_line)
4848 line_offset = line_info->dw_line_num - current_line;
4849 line_delta = line_offset - DWARF_LINE_BASE;
4850 current_line = line_info->dw_line_num;
4851 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4852 /* 1-byte special line number instruction. */
4856 /* Advance line instruction. */
4858 size += size_of_sleb128 (line_offset);
4860 /* Generate line entry instruction. */
4867 /* If we're done with a function, end its sequence. */
4868 if (lt_index == separate_line_info_table_in_use
4869 || separate_line_info_table[lt_index].function != function)
4874 /* Advance pc instruction. */
4878 size += size_of_set_address;
4880 /* End of line number info. marker. */
4881 size += 1 + size_of_uleb128 (1) + 1;
4888 /* Return the size of the .debug_pubnames table generated for the
4889 compilation unit. */
4891 static unsigned long
4894 register unsigned long size;
4895 register unsigned i;
4897 size = DWARF_PUBNAMES_HEADER_SIZE;
4898 for (i = 0; i < pubname_table_in_use; ++i)
4900 register pubname_ref p = &pubname_table[i];
4901 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4904 size += DWARF_OFFSET_SIZE;
4908 /* Return the size of the information in the .debug_aranges section. */
4910 static unsigned long
4913 register unsigned long size;
4915 size = DWARF_ARANGES_HEADER_SIZE;
4917 /* Count the address/length pair for this compilation unit. */
4918 size += 2 * PTR_SIZE;
4919 size += 2 * PTR_SIZE * arange_table_in_use;
4921 /* Count the two zero words used to terminated the address range table. */
4922 size += 2 * PTR_SIZE;
4926 /* Select the encoding of an attribute value. */
4928 static enum dwarf_form
4932 switch (v->val_class)
4934 case dw_val_class_addr:
4935 return DW_FORM_addr;
4936 case dw_val_class_loc:
4937 switch (constant_size (size_of_locs (v->v.val_loc)))
4940 return DW_FORM_block1;
4942 return DW_FORM_block2;
4946 case dw_val_class_const:
4947 return DW_FORM_data4;
4948 case dw_val_class_unsigned_const:
4949 switch (constant_size (v->v.val_unsigned))
4952 return DW_FORM_data1;
4954 return DW_FORM_data2;
4956 return DW_FORM_data4;
4958 return DW_FORM_data8;
4962 case dw_val_class_long_long:
4963 return DW_FORM_block1;
4964 case dw_val_class_float:
4965 return DW_FORM_block1;
4966 case dw_val_class_flag:
4967 return DW_FORM_flag;
4968 case dw_val_class_die_ref:
4970 case dw_val_class_fde_ref:
4971 return DW_FORM_data;
4972 case dw_val_class_lbl_id:
4973 return DW_FORM_addr;
4974 case dw_val_class_section_offset:
4975 return DW_FORM_data;
4976 case dw_val_class_str:
4977 return DW_FORM_string;
4983 /* Output the encoding of an attribute value. */
4986 output_value_format (v)
4989 enum dwarf_form form = value_format (v);
4991 output_uleb128 (form);
4993 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
4995 fputc ('\n', asm_out_file);
4998 /* Output the .debug_abbrev section which defines the DIE abbreviation
5002 output_abbrev_section ()
5004 unsigned long abbrev_id;
5007 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5009 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5011 output_uleb128 (abbrev_id);
5013 fprintf (asm_out_file, " (abbrev code)");
5015 fputc ('\n', asm_out_file);
5016 output_uleb128 (abbrev->die_tag);
5018 fprintf (asm_out_file, " (TAG: %s)",
5019 dwarf_tag_name (abbrev->die_tag));
5021 fputc ('\n', asm_out_file);
5022 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5023 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5026 fprintf (asm_out_file, "\t%s %s",
5028 (abbrev->die_child != NULL
5029 ? "DW_children_yes" : "DW_children_no"));
5031 fputc ('\n', asm_out_file);
5033 for (a_attr = abbrev->die_attr; a_attr != NULL;
5034 a_attr = a_attr->dw_attr_next)
5036 output_uleb128 (a_attr->dw_attr);
5038 fprintf (asm_out_file, " (%s)",
5039 dwarf_attr_name (a_attr->dw_attr));
5041 fputc ('\n', asm_out_file);
5042 output_value_format (&a_attr->dw_attr_val);
5045 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5049 /* Output location description stack opcode's operands (if any). */
5052 output_loc_operands (loc)
5053 register dw_loc_descr_ref loc;
5055 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5056 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5058 switch (loc->dw_loc_opc)
5061 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5062 fputc ('\n', asm_out_file);
5066 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5067 fputc ('\n', asm_out_file);
5071 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5072 fputc ('\n', asm_out_file);
5076 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5077 fputc ('\n', asm_out_file);
5082 fputc ('\n', asm_out_file);
5085 output_uleb128 (val1->v.val_unsigned);
5086 fputc ('\n', asm_out_file);
5089 output_sleb128 (val1->v.val_int);
5090 fputc ('\n', asm_out_file);
5093 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5094 fputc ('\n', asm_out_file);
5096 case DW_OP_plus_uconst:
5097 output_uleb128 (val1->v.val_unsigned);
5098 fputc ('\n', asm_out_file);
5102 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5103 fputc ('\n', asm_out_file);
5137 output_sleb128 (val1->v.val_int);
5138 fputc ('\n', asm_out_file);
5141 output_uleb128 (val1->v.val_unsigned);
5142 fputc ('\n', asm_out_file);
5145 output_sleb128 (val1->v.val_int);
5146 fputc ('\n', asm_out_file);
5149 output_uleb128 (val1->v.val_unsigned);
5150 fputc ('\n', asm_out_file);
5151 output_sleb128 (val2->v.val_int);
5152 fputc ('\n', asm_out_file);
5155 output_uleb128 (val1->v.val_unsigned);
5156 fputc ('\n', asm_out_file);
5158 case DW_OP_deref_size:
5159 case DW_OP_xderef_size:
5160 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5161 fputc ('\n', asm_out_file);
5168 /* Compute the offset of a sibling. */
5170 static unsigned long
5171 sibling_offset (die)
5174 unsigned long offset;
5176 if (die->die_child_last == NULL)
5177 offset = die->die_offset + size_of_die (die);
5179 offset = sibling_offset (die->die_child_last) + 1;
5184 /* Output the DIE and its attributes. Called recursively to generate
5185 the definitions of each child DIE. */
5189 register dw_die_ref die;
5191 register dw_attr_ref a;
5192 register dw_die_ref c;
5193 register unsigned long ref_offset;
5194 register unsigned long size;
5195 register dw_loc_descr_ref loc;
5198 output_uleb128 (die->die_abbrev);
5200 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5201 die->die_offset, dwarf_tag_name (die->die_tag));
5203 fputc ('\n', asm_out_file);
5205 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5207 switch (a->dw_attr_val.val_class)
5209 case dw_val_class_addr:
5210 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5211 a->dw_attr_val.v.val_addr);
5214 case dw_val_class_loc:
5215 size = size_of_locs (a->dw_attr_val.v.val_loc);
5217 /* Output the block length for this list of location operations. */
5218 switch (constant_size (size))
5221 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5224 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5231 fprintf (asm_out_file, "\t%s %s",
5232 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5234 fputc ('\n', asm_out_file);
5235 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5236 loc = loc->dw_loc_next)
5238 /* Output the opcode. */
5239 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5241 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5242 dwarf_stack_op_name (loc->dw_loc_opc));
5244 fputc ('\n', asm_out_file);
5246 /* Output the operand(s) (if any). */
5247 output_loc_operands (loc);
5251 case dw_val_class_const:
5252 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5255 case dw_val_class_unsigned_const:
5256 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5259 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5260 a->dw_attr_val.v.val_unsigned);
5263 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5264 a->dw_attr_val.v.val_unsigned);
5267 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5268 a->dw_attr_val.v.val_unsigned);
5271 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5272 a->dw_attr_val.v.val_long_long.hi,
5273 a->dw_attr_val.v.val_long_long.low);
5280 case dw_val_class_long_long:
5281 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5283 fprintf (asm_out_file, "\t%s %s",
5284 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5286 fputc ('\n', asm_out_file);
5287 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5288 a->dw_attr_val.v.val_long_long.hi,
5289 a->dw_attr_val.v.val_long_long.low);
5292 fprintf (asm_out_file,
5293 "\t%s long long constant", ASM_COMMENT_START);
5295 fputc ('\n', asm_out_file);
5298 case dw_val_class_float:
5299 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5300 a->dw_attr_val.v.val_float.length * 4);
5302 fprintf (asm_out_file, "\t%s %s",
5303 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5305 fputc ('\n', asm_out_file);
5306 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5308 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5309 a->dw_attr_val.v.val_float.array[i]);
5311 fprintf (asm_out_file, "\t%s fp constant word %d",
5312 ASM_COMMENT_START, i);
5314 fputc ('\n', asm_out_file);
5318 case dw_val_class_flag:
5319 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5322 case dw_val_class_die_ref:
5323 if (a->dw_attr_val.v.val_die_ref != NULL)
5324 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5325 else if (a->dw_attr == DW_AT_sibling)
5326 ref_offset = sibling_offset(die);
5330 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5333 case dw_val_class_fde_ref:
5336 ASM_GENERATE_INTERNAL_LABEL
5337 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5338 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5339 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5343 case dw_val_class_lbl_id:
5344 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5347 case dw_val_class_section_offset:
5348 ASM_OUTPUT_DWARF_OFFSET (asm_out_file,
5350 (a->dw_attr_val.v.val_section));
5353 case dw_val_class_str:
5355 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5357 ASM_OUTPUT_ASCII (asm_out_file,
5358 a->dw_attr_val.v.val_str,
5359 strlen (a->dw_attr_val.v.val_str) + 1);
5366 if (a->dw_attr_val.val_class != dw_val_class_loc
5367 && a->dw_attr_val.val_class != dw_val_class_long_long
5368 && a->dw_attr_val.val_class != dw_val_class_float)
5371 fprintf (asm_out_file, "\t%s %s",
5372 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5374 fputc ('\n', asm_out_file);
5378 for (c = die->die_child; c != NULL; c = c->die_sib)
5381 if (die->die_child != NULL)
5383 /* Add null byte to terminate sibling list. */
5384 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5386 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5387 ASM_COMMENT_START, die->die_offset);
5389 fputc ('\n', asm_out_file);
5393 /* Output the compilation unit that appears at the beginning of the
5394 .debug_info section, and precedes the DIE descriptions. */
5397 output_compilation_unit_header ()
5399 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5401 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5404 fputc ('\n', asm_out_file);
5405 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5407 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5409 fputc ('\n', asm_out_file);
5410 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (ABBREV_SECTION));
5412 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5415 fputc ('\n', asm_out_file);
5416 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5418 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5420 fputc ('\n', asm_out_file);
5423 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5424 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5425 argument list, and maybe the scope. */
5428 dwarf2_name (decl, scope)
5432 return (*decl_printable_name) (decl, scope ? 1 : 0);
5435 /* Add a new entry to .debug_pubnames if appropriate. */
5438 add_pubname (decl, die)
5444 if (! TREE_PUBLIC (decl))
5447 if (pubname_table_in_use == pubname_table_allocated)
5449 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5450 pubname_table = (pubname_ref) xrealloc
5451 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5454 p = &pubname_table[pubname_table_in_use++];
5457 p->name = xstrdup (dwarf2_name (decl, 1));
5460 /* Output the public names table used to speed up access to externally
5461 visible names. For now, only generate entries for externally
5462 visible procedures. */
5467 register unsigned i;
5468 register unsigned long pubnames_length = size_of_pubnames ();
5470 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5473 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5476 fputc ('\n', asm_out_file);
5477 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5480 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5482 fputc ('\n', asm_out_file);
5483 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5485 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5488 fputc ('\n', asm_out_file);
5489 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5491 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5493 fputc ('\n', asm_out_file);
5494 for (i = 0; i < pubname_table_in_use; ++i)
5496 register pubname_ref pub = &pubname_table[i];
5498 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5500 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5502 fputc ('\n', asm_out_file);
5506 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5507 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5511 ASM_OUTPUT_ASCII (asm_out_file, pub->name, strlen (pub->name) + 1);
5514 fputc ('\n', asm_out_file);
5517 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5518 fputc ('\n', asm_out_file);
5521 /* Add a new entry to .debug_aranges if appropriate. */
5524 add_arange (decl, die)
5528 if (! DECL_SECTION_NAME (decl))
5531 if (arange_table_in_use == arange_table_allocated)
5533 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5535 = (arange_ref) xrealloc (arange_table,
5536 arange_table_allocated * sizeof (dw_die_ref));
5539 arange_table[arange_table_in_use++] = die;
5542 /* Output the information that goes into the .debug_aranges table.
5543 Namely, define the beginning and ending address range of the
5544 text section generated for this compilation unit. */
5549 register unsigned i;
5550 register unsigned long aranges_length = size_of_aranges ();
5552 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5554 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5557 fputc ('\n', asm_out_file);
5558 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5560 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5562 fputc ('\n', asm_out_file);
5563 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5565 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5568 fputc ('\n', asm_out_file);
5569 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5571 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5573 fputc ('\n', asm_out_file);
5574 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5576 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5579 fputc ('\n', asm_out_file);
5580 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
5582 fprintf (asm_out_file, ",0,0");
5585 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5586 ASM_COMMENT_START, 2 * PTR_SIZE);
5588 fputc ('\n', asm_out_file);
5589 ASM_OUTPUT_DWARF_ADDR (asm_out_file, stripattributes (TEXT_SECTION));
5591 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5593 fputc ('\n', asm_out_file);
5594 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5595 stripattributes (TEXT_SECTION));
5597 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5599 fputc ('\n', asm_out_file);
5600 for (i = 0; i < arange_table_in_use; ++i)
5602 dw_die_ref a = arange_table[i];
5604 if (a->die_tag == DW_TAG_subprogram)
5605 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
5608 char *name = get_AT_string (a, DW_AT_MIPS_linkage_name);
5610 name = get_AT_string (a, DW_AT_name);
5612 ASM_OUTPUT_DWARF_ADDR (asm_out_file, name);
5616 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5618 fputc ('\n', asm_out_file);
5619 if (a->die_tag == DW_TAG_subprogram)
5620 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
5623 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5624 get_AT_unsigned (a, DW_AT_byte_size));
5627 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5629 fputc ('\n', asm_out_file);
5632 /* Output the terminator words. */
5633 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5634 fputc ('\n', asm_out_file);
5635 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5636 fputc ('\n', asm_out_file);
5639 /* Output the source line number correspondence information. This
5640 information goes into the .debug_line section.
5642 If the format of this data changes, then the function size_of_line_info
5643 must also be adjusted the same way. */
5648 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5649 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5650 register unsigned opc;
5651 register unsigned n_op_args;
5652 register unsigned long ft_index;
5653 register unsigned long lt_index;
5654 register unsigned long current_line;
5655 register long line_offset;
5656 register long line_delta;
5657 register unsigned long current_file;
5658 register unsigned long function;
5660 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5662 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5665 fputc ('\n', asm_out_file);
5666 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5668 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5670 fputc ('\n', asm_out_file);
5671 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5673 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5675 fputc ('\n', asm_out_file);
5676 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5678 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5681 fputc ('\n', asm_out_file);
5682 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5684 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5687 fputc ('\n', asm_out_file);
5688 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5690 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5693 fputc ('\n', asm_out_file);
5694 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5696 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5699 fputc ('\n', asm_out_file);
5700 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5702 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5704 fputc ('\n', asm_out_file);
5705 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5709 case DW_LNS_advance_pc:
5710 case DW_LNS_advance_line:
5711 case DW_LNS_set_file:
5712 case DW_LNS_set_column:
5713 case DW_LNS_fixed_advance_pc:
5720 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5722 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5723 ASM_COMMENT_START, opc, n_op_args);
5724 fputc ('\n', asm_out_file);
5728 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5730 /* Include directory table is empty, at present */
5731 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5732 fputc ('\n', asm_out_file);
5734 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5736 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5740 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5741 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5742 ASM_COMMENT_START, ft_index);
5746 ASM_OUTPUT_ASCII (asm_out_file,
5747 file_table[ft_index],
5748 strlen (file_table[ft_index]) + 1);
5751 fputc ('\n', asm_out_file);
5753 /* Include directory index */
5755 fputc ('\n', asm_out_file);
5757 /* Modification time */
5759 fputc ('\n', asm_out_file);
5761 /* File length in bytes */
5763 fputc ('\n', asm_out_file);
5766 /* Terminate the file name table */
5767 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5768 fputc ('\n', asm_out_file);
5770 /* Set the address register to the first location in the text section */
5771 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5773 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5775 fputc ('\n', asm_out_file);
5776 output_uleb128 (1 + PTR_SIZE);
5777 fputc ('\n', asm_out_file);
5778 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5779 fputc ('\n', asm_out_file);
5780 ASM_OUTPUT_DWARF_ADDR (asm_out_file, stripattributes (TEXT_SECTION));
5781 fputc ('\n', asm_out_file);
5783 /* Generate the line number to PC correspondence table, encoded as
5784 a series of state machine operations. */
5787 strcpy (prev_line_label, stripattributes (TEXT_SECTION));
5788 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5790 register dw_line_info_ref line_info;
5792 /* Emit debug info for the address of the current line, choosing
5793 the encoding that uses the least amount of space. */
5794 /* ??? Unfortunately, we have little choice here currently, and must
5795 always use the most general form. Gcc does not know the address
5796 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5797 dwarf2 aware assemblers at this time, so we can't use any special
5798 pseudo ops that would allow the assembler to optimally encode this for
5799 us. Many ports do have length attributes which will give an upper
5800 bound on the address range. We could perhaps use length attributes
5801 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5802 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5805 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5806 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5808 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5811 fputc ('\n', asm_out_file);
5812 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5813 fputc ('\n', asm_out_file);
5817 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5818 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5820 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5822 fputc ('\n', asm_out_file);
5823 output_uleb128 (1 + PTR_SIZE);
5824 fputc ('\n', asm_out_file);
5825 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5826 fputc ('\n', asm_out_file);
5827 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5828 fputc ('\n', asm_out_file);
5830 strcpy (prev_line_label, line_label);
5832 /* Emit debug info for the source file of the current line, if
5833 different from the previous line. */
5834 line_info = &line_info_table[lt_index];
5835 if (line_info->dw_file_num != current_file)
5837 current_file = line_info->dw_file_num;
5838 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5840 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5842 fputc ('\n', asm_out_file);
5843 output_uleb128 (current_file);
5845 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5847 fputc ('\n', asm_out_file);
5850 /* Emit debug info for the current line number, choosing the encoding
5851 that uses the least amount of space. */
5852 line_offset = line_info->dw_line_num - current_line;
5853 line_delta = line_offset - DWARF_LINE_BASE;
5854 current_line = line_info->dw_line_num;
5855 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5857 /* This can handle deltas from -10 to 234, using the current
5858 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5860 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5861 DWARF_LINE_OPCODE_BASE + line_delta);
5863 fprintf (asm_out_file,
5864 "\t%s line %ld", ASM_COMMENT_START, current_line);
5866 fputc ('\n', asm_out_file);
5870 /* This can handle any delta. This takes at least 4 bytes, depending
5871 on the value being encoded. */
5872 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5874 fprintf (asm_out_file, "\t%s advance to line %ld",
5875 ASM_COMMENT_START, current_line);
5877 fputc ('\n', asm_out_file);
5878 output_sleb128 (line_offset);
5879 fputc ('\n', asm_out_file);
5880 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5881 fputc ('\n', asm_out_file);
5885 /* Emit debug info for the address of the end of the function. */
5888 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5890 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5893 fputc ('\n', asm_out_file);
5894 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
5895 fputc ('\n', asm_out_file);
5899 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5901 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5902 fputc ('\n', asm_out_file);
5903 output_uleb128 (1 + PTR_SIZE);
5904 fputc ('\n', asm_out_file);
5905 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5906 fputc ('\n', asm_out_file);
5907 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
5908 fputc ('\n', asm_out_file);
5911 /* Output the marker for the end of the line number info. */
5912 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5914 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
5916 fputc ('\n', asm_out_file);
5918 fputc ('\n', asm_out_file);
5919 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
5920 fputc ('\n', asm_out_file);
5925 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
5927 register dw_separate_line_info_ref line_info
5928 = &separate_line_info_table[lt_index];
5930 /* Emit debug info for the address of the current line. If this is
5931 a new function, or the first line of a function, then we need
5932 to handle it differently. */
5933 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
5935 if (function != line_info->function)
5937 function = line_info->function;
5939 /* Set the address register to the first line in the function */
5940 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5942 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5945 fputc ('\n', asm_out_file);
5946 output_uleb128 (1 + PTR_SIZE);
5947 fputc ('\n', asm_out_file);
5948 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5949 fputc ('\n', asm_out_file);
5950 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5951 fputc ('\n', asm_out_file);
5955 /* ??? See the DW_LNS_advance_pc comment above. */
5958 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5960 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5963 fputc ('\n', asm_out_file);
5964 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
5966 fputc ('\n', asm_out_file);
5970 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5972 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5974 fputc ('\n', asm_out_file);
5975 output_uleb128 (1 + PTR_SIZE);
5976 fputc ('\n', asm_out_file);
5977 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5978 fputc ('\n', asm_out_file);
5979 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5980 fputc ('\n', asm_out_file);
5983 strcpy (prev_line_label, line_label);
5985 /* Emit debug info for the source file of the current line, if
5986 different from the previous line. */
5987 if (line_info->dw_file_num != current_file)
5989 current_file = line_info->dw_file_num;
5990 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5992 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5994 fputc ('\n', asm_out_file);
5995 output_uleb128 (current_file);
5997 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5999 fputc ('\n', asm_out_file);
6002 /* Emit debug info for the current line number, choosing the encoding
6003 that uses the least amount of space. */
6004 if (line_info->dw_line_num != current_line)
6006 line_offset = line_info->dw_line_num - current_line;
6007 line_delta = line_offset - DWARF_LINE_BASE;
6008 current_line = line_info->dw_line_num;
6009 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6011 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6012 DWARF_LINE_OPCODE_BASE + line_delta);
6014 fprintf (asm_out_file,
6015 "\t%s line %ld", ASM_COMMENT_START, current_line);
6017 fputc ('\n', asm_out_file);
6021 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6023 fprintf (asm_out_file, "\t%s advance to line %ld",
6024 ASM_COMMENT_START, current_line);
6026 fputc ('\n', asm_out_file);
6027 output_sleb128 (line_offset);
6028 fputc ('\n', asm_out_file);
6029 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6030 fputc ('\n', asm_out_file);
6036 /* If we're done with a function, end its sequence. */
6037 if (lt_index == separate_line_info_table_in_use
6038 || separate_line_info_table[lt_index].function != function)
6043 /* Emit debug info for the address of the end of the function. */
6044 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6047 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6049 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6052 fputc ('\n', asm_out_file);
6053 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6055 fputc ('\n', asm_out_file);
6059 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6061 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6063 fputc ('\n', asm_out_file);
6064 output_uleb128 (1 + PTR_SIZE);
6065 fputc ('\n', asm_out_file);
6066 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6067 fputc ('\n', asm_out_file);
6068 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6069 fputc ('\n', asm_out_file);
6072 /* Output the marker for the end of this sequence. */
6073 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6075 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6078 fputc ('\n', asm_out_file);
6080 fputc ('\n', asm_out_file);
6081 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6082 fputc ('\n', asm_out_file);
6087 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6088 in question represents the outermost pair of curly braces (i.e. the "body
6089 block") of a function or method.
6091 For any BLOCK node representing a "body block" of a function or method, the
6092 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6093 represents the outermost (function) scope for the function or method (i.e.
6094 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6095 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6098 is_body_block (stmt)
6101 if (TREE_CODE (stmt) == BLOCK)
6103 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6105 if (TREE_CODE (parent) == BLOCK)
6107 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6109 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6117 /* Given a pointer to a tree node for some base type, return a pointer to
6118 a DIE that describes the given type.
6120 This routine must only be called for GCC type nodes that correspond to
6121 Dwarf base (fundamental) types. */
6124 base_type_die (type)
6127 register dw_die_ref base_type_result;
6128 register char *type_name;
6129 register enum dwarf_type encoding;
6130 register tree name = TYPE_NAME (type);
6132 if (TREE_CODE (type) == ERROR_MARK
6133 || TREE_CODE (type) == VOID_TYPE)
6136 if (TREE_CODE (name) == TYPE_DECL)
6137 name = DECL_NAME (name);
6138 type_name = IDENTIFIER_POINTER (name);
6140 switch (TREE_CODE (type))
6143 /* Carefully distinguish the C character types, without messing
6144 up if the language is not C. Note that we check only for the names
6145 that contain spaces; other names might occur by coincidence in other
6147 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6148 && (type == char_type_node
6149 || ! strcmp (type_name, "signed char")
6150 || ! strcmp (type_name, "unsigned char"))))
6152 if (TREE_UNSIGNED (type))
6153 encoding = DW_ATE_unsigned;
6155 encoding = DW_ATE_signed;
6158 /* else fall through */
6161 /* GNU Pascal/Ada CHAR type. Not used in C. */
6162 if (TREE_UNSIGNED (type))
6163 encoding = DW_ATE_unsigned_char;
6165 encoding = DW_ATE_signed_char;
6169 encoding = DW_ATE_float;
6173 encoding = DW_ATE_complex_float;
6177 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6178 encoding = DW_ATE_boolean;
6182 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6185 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6186 add_AT_string (base_type_result, DW_AT_name, type_name);
6187 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6188 int_size_in_bytes (type));
6189 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6191 return base_type_result;
6194 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6195 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6196 a given type is generally the same as the given type, except that if the
6197 given type is a pointer or reference type, then the root type of the given
6198 type is the root type of the "basis" type for the pointer or reference
6199 type. (This definition of the "root" type is recursive.) Also, the root
6200 type of a `const' qualified type or a `volatile' qualified type is the
6201 root type of the given type without the qualifiers. */
6207 if (TREE_CODE (type) == ERROR_MARK)
6208 return error_mark_node;
6210 switch (TREE_CODE (type))
6213 return error_mark_node;
6216 case REFERENCE_TYPE:
6217 return type_main_variant (root_type (TREE_TYPE (type)));
6220 return type_main_variant (type);
6224 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6225 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6231 switch (TREE_CODE (type))
6246 case QUAL_UNION_TYPE:
6251 case REFERENCE_TYPE:
6264 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6265 entry that chains various modifiers in front of the given type. */
6268 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6270 register int is_const_type;
6271 register int is_volatile_type;
6272 register dw_die_ref context_die;
6274 register enum tree_code code = TREE_CODE (type);
6275 register dw_die_ref mod_type_die = NULL;
6276 register dw_die_ref sub_die = NULL;
6277 register tree item_type = NULL;
6279 if (code != ERROR_MARK)
6281 type = build_type_variant (type, is_const_type, is_volatile_type);
6283 mod_type_die = lookup_type_die (type);
6285 return mod_type_die;
6287 /* Handle C typedef types. */
6288 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6289 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6291 tree dtype = TREE_TYPE (TYPE_NAME (type));
6294 /* For a named type, use the typedef. */
6295 gen_type_die (type, context_die);
6296 mod_type_die = lookup_type_die (type);
6299 else if (is_const_type < TYPE_READONLY (dtype)
6300 || is_volatile_type < TYPE_VOLATILE (dtype))
6301 /* cv-unqualified version of named type. Just use the unnamed
6302 type to which it refers. */
6304 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6305 is_const_type, is_volatile_type,
6307 /* Else cv-qualified version of named type; fall through. */
6312 else if (is_const_type)
6314 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6315 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6317 else if (is_volatile_type)
6319 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6320 sub_die = modified_type_die (type, 0, 0, context_die);
6322 else if (code == POINTER_TYPE)
6324 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6325 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6327 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6329 item_type = TREE_TYPE (type);
6331 else if (code == REFERENCE_TYPE)
6333 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6334 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6336 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6338 item_type = TREE_TYPE (type);
6340 else if (is_base_type (type))
6341 mod_type_die = base_type_die (type);
6344 gen_type_die (type, context_die);
6346 /* We have to get the type_main_variant here (and pass that to the
6347 `lookup_type_die' routine) because the ..._TYPE node we have
6348 might simply be a *copy* of some original type node (where the
6349 copy was created to help us keep track of typedef names) and
6350 that copy might have a different TYPE_UID from the original
6352 mod_type_die = lookup_type_die (type_main_variant (type));
6353 if (mod_type_die == NULL)
6358 equate_type_number_to_die (type, mod_type_die);
6360 /* We must do this after the equate_type_number_to_die call, in case
6361 this is a recursive type. This ensures that the modified_type_die
6362 recursion will terminate even if the type is recursive. Recursive
6363 types are possible in Ada. */
6364 sub_die = modified_type_die (item_type,
6365 TYPE_READONLY (item_type),
6366 TYPE_VOLATILE (item_type),
6369 if (sub_die != NULL)
6370 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6372 return mod_type_die;
6375 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6376 an enumerated type. */
6382 return TREE_CODE (type) == ENUMERAL_TYPE;
6385 /* Return a location descriptor that designates a machine register. */
6387 static dw_loc_descr_ref
6388 reg_loc_descriptor (rtl)
6391 register dw_loc_descr_ref loc_result = NULL;
6392 register unsigned reg = reg_number (rtl);
6395 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6397 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6402 /* Return a location descriptor that designates a base+offset location. */
6404 static dw_loc_descr_ref
6405 based_loc_descr (reg, offset)
6409 register dw_loc_descr_ref loc_result;
6410 /* For the "frame base", we use the frame pointer or stack pointer
6411 registers, since the RTL for local variables is relative to one of
6413 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6414 ? HARD_FRAME_POINTER_REGNUM
6415 : STACK_POINTER_REGNUM);
6418 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6420 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6422 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6427 /* Return true if this RTL expression describes a base+offset calculation. */
6433 return (GET_CODE (rtl) == PLUS
6434 && ((GET_CODE (XEXP (rtl, 0)) == REG
6435 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6438 /* The following routine converts the RTL for a variable or parameter
6439 (resident in memory) into an equivalent Dwarf representation of a
6440 mechanism for getting the address of that same variable onto the top of a
6441 hypothetical "address evaluation" stack.
6443 When creating memory location descriptors, we are effectively transforming
6444 the RTL for a memory-resident object into its Dwarf postfix expression
6445 equivalent. This routine recursively descends an RTL tree, turning
6446 it into Dwarf postfix code as it goes. */
6448 static dw_loc_descr_ref
6449 mem_loc_descriptor (rtl)
6452 dw_loc_descr_ref mem_loc_result = NULL;
6453 /* Note that for a dynamically sized array, the location we will generate a
6454 description of here will be the lowest numbered location which is
6455 actually within the array. That's *not* necessarily the same as the
6456 zeroth element of the array. */
6458 switch (GET_CODE (rtl))
6461 /* The case of a subreg may arise when we have a local (register)
6462 variable or a formal (register) parameter which doesn't quite fill
6463 up an entire register. For now, just assume that it is
6464 legitimate to make the Dwarf info refer to the whole register which
6465 contains the given subreg. */
6466 rtl = XEXP (rtl, 0);
6468 /* ... fall through ... */
6471 /* Whenever a register number forms a part of the description of the
6472 method for calculating the (dynamic) address of a memory resident
6473 object, DWARF rules require the register number be referred to as
6474 a "base register". This distinction is not based in any way upon
6475 what category of register the hardware believes the given register
6476 belongs to. This is strictly DWARF terminology we're dealing with
6477 here. Note that in cases where the location of a memory-resident
6478 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6479 OP_CONST (0)) the actual DWARF location descriptor that we generate
6480 may just be OP_BASEREG (basereg). This may look deceptively like
6481 the object in question was allocated to a register (rather than in
6482 memory) so DWARF consumers need to be aware of the subtle
6483 distinction between OP_REG and OP_BASEREG. */
6484 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6488 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6489 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6494 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6495 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6496 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6500 if (is_based_loc (rtl))
6501 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6502 INTVAL (XEXP (rtl, 1)));
6505 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6506 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6507 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6512 /* If a pseudo-reg is optimized away, it is possible for it to
6513 be replaced with a MEM containing a multiply. */
6514 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6515 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6516 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6520 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6527 return mem_loc_result;
6530 /* Return a descriptor that describes the concatenation of two locations.
6531 This is typically a complex variable. */
6533 static dw_loc_descr_ref
6534 concat_loc_descriptor (x0, x1)
6535 register rtx x0, x1;
6537 dw_loc_descr_ref cc_loc_result = NULL;
6539 if (!is_pseudo_reg (x0)
6540 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6541 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6542 add_loc_descr (&cc_loc_result,
6543 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6545 if (!is_pseudo_reg (x1)
6546 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6547 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6548 add_loc_descr (&cc_loc_result,
6549 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6551 return cc_loc_result;
6554 /* Output a proper Dwarf location descriptor for a variable or parameter
6555 which is either allocated in a register or in a memory location. For a
6556 register, we just generate an OP_REG and the register number. For a
6557 memory location we provide a Dwarf postfix expression describing how to
6558 generate the (dynamic) address of the object onto the address stack. */
6560 static dw_loc_descr_ref
6561 loc_descriptor (rtl)
6564 dw_loc_descr_ref loc_result = NULL;
6565 switch (GET_CODE (rtl))
6568 /* The case of a subreg may arise when we have a local (register)
6569 variable or a formal (register) parameter which doesn't quite fill
6570 up an entire register. For now, just assume that it is
6571 legitimate to make the Dwarf info refer to the whole register which
6572 contains the given subreg. */
6573 rtl = XEXP (rtl, 0);
6575 /* ... fall through ... */
6578 loc_result = reg_loc_descriptor (rtl);
6582 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6586 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6596 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6597 which is not less than the value itself. */
6599 static inline unsigned
6600 ceiling (value, boundary)
6601 register unsigned value;
6602 register unsigned boundary;
6604 return (((value + boundary - 1) / boundary) * boundary);
6607 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6608 pointer to the declared type for the relevant field variable, or return
6609 `integer_type_node' if the given node turns out to be an
6618 if (TREE_CODE (decl) == ERROR_MARK)
6619 return integer_type_node;
6621 type = DECL_BIT_FIELD_TYPE (decl);
6622 if (type == NULL_TREE)
6623 type = TREE_TYPE (decl);
6628 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6629 node, return the alignment in bits for the type, or else return
6630 BITS_PER_WORD if the node actually turns out to be an
6633 static inline unsigned
6634 simple_type_align_in_bits (type)
6637 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6640 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6641 node, return the size in bits for the type if it is a constant, or else
6642 return the alignment for the type if the type's size is not constant, or
6643 else return BITS_PER_WORD if the type actually turns out to be an
6646 static inline unsigned
6647 simple_type_size_in_bits (type)
6650 if (TREE_CODE (type) == ERROR_MARK)
6651 return BITS_PER_WORD;
6654 register tree type_size_tree = TYPE_SIZE (type);
6656 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6657 return TYPE_ALIGN (type);
6659 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6663 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6664 return the byte offset of the lowest addressed byte of the "containing
6665 object" for the given FIELD_DECL, or return 0 if we are unable to
6666 determine what that offset is, either because the argument turns out to
6667 be a pointer to an ERROR_MARK node, or because the offset is actually
6668 variable. (We can't handle the latter case just yet). */
6671 field_byte_offset (decl)
6674 register unsigned type_align_in_bytes;
6675 register unsigned type_align_in_bits;
6676 register unsigned type_size_in_bits;
6677 register unsigned object_offset_in_align_units;
6678 register unsigned object_offset_in_bits;
6679 register unsigned object_offset_in_bytes;
6681 register tree bitpos_tree;
6682 register tree field_size_tree;
6683 register unsigned bitpos_int;
6684 register unsigned deepest_bitpos;
6685 register unsigned field_size_in_bits;
6687 if (TREE_CODE (decl) == ERROR_MARK)
6690 if (TREE_CODE (decl) != FIELD_DECL)
6693 type = field_type (decl);
6695 bitpos_tree = DECL_FIELD_BITPOS (decl);
6696 field_size_tree = DECL_SIZE (decl);
6698 /* We cannot yet cope with fields whose positions or sizes are variable, so
6699 for now, when we see such things, we simply return 0. Someday, we may
6700 be able to handle such cases, but it will be damn difficult. */
6701 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6703 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6705 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6708 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6709 type_size_in_bits = simple_type_size_in_bits (type);
6710 type_align_in_bits = simple_type_align_in_bits (type);
6711 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6713 /* Note that the GCC front-end doesn't make any attempt to keep track of
6714 the starting bit offset (relative to the start of the containing
6715 structure type) of the hypothetical "containing object" for a bit-
6716 field. Thus, when computing the byte offset value for the start of the
6717 "containing object" of a bit-field, we must deduce this information on
6718 our own. This can be rather tricky to do in some cases. For example,
6719 handling the following structure type definition when compiling for an
6720 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6723 struct S { int field1; long long field2:31; };
6725 Fortunately, there is a simple rule-of-thumb which can be
6726 used in such cases. When compiling for an i386/i486, GCC will allocate
6727 8 bytes for the structure shown above. It decides to do this based upon
6728 one simple rule for bit-field allocation. Quite simply, GCC allocates
6729 each "containing object" for each bit-field at the first (i.e. lowest
6730 addressed) legitimate alignment boundary (based upon the required
6731 minimum alignment for the declared type of the field) which it can
6732 possibly use, subject to the condition that there is still enough
6733 available space remaining in the containing object (when allocated at
6734 the selected point) to fully accommodate all of the bits of the
6735 bit-field itself. This simple rule makes it obvious why GCC allocates
6736 8 bytes for each object of the structure type shown above. When looking
6737 for a place to allocate the "containing object" for `field2', the
6738 compiler simply tries to allocate a 64-bit "containing object" at each
6739 successive 32-bit boundary (starting at zero) until it finds a place to
6740 allocate that 64- bit field such that at least 31 contiguous (and
6741 previously unallocated) bits remain within that selected 64 bit field.
6742 (As it turns out, for the example above, the compiler finds that it is
6743 OK to allocate the "containing object" 64-bit field at bit-offset zero
6744 within the structure type.) Here we attempt to work backwards from the
6745 limited set of facts we're given, and we try to deduce from those facts,
6746 where GCC must have believed that the containing object started (within
6747 the structure type). The value we deduce is then used (by the callers of
6748 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6749 for fields (both bit-fields and, in the case of DW_AT_location, regular
6752 /* Figure out the bit-distance from the start of the structure to the
6753 "deepest" bit of the bit-field. */
6754 deepest_bitpos = bitpos_int + field_size_in_bits;
6756 /* This is the tricky part. Use some fancy footwork to deduce where the
6757 lowest addressed bit of the containing object must be. */
6758 object_offset_in_bits
6759 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6761 /* Compute the offset of the containing object in "alignment units". */
6762 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6764 /* Compute the offset of the containing object in bytes. */
6765 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6767 return object_offset_in_bytes;
6770 /* The following routines define various Dwarf attributes and any data
6771 associated with them. */
6773 /* Add a location description attribute value to a DIE.
6775 This emits location attributes suitable for whole variables and
6776 whole parameters. Note that the location attributes for struct fields are
6777 generated by the routine `data_member_location_attribute' below. */
6780 add_AT_location_description (die, attr_kind, rtl)
6782 enum dwarf_attribute attr_kind;
6785 /* Handle a special case. If we are about to output a location descriptor
6786 for a variable or parameter which has been optimized out of existence,
6787 don't do that. A variable which has been optimized out
6788 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6789 Currently, in some rare cases, variables can have DECL_RTL values which
6790 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6791 elsewhere in the compiler. We treat such cases as if the variable(s) in
6792 question had been optimized out of existence. */
6794 if (is_pseudo_reg (rtl)
6795 || (GET_CODE (rtl) == MEM
6796 && is_pseudo_reg (XEXP (rtl, 0)))
6797 || (GET_CODE (rtl) == CONCAT
6798 && is_pseudo_reg (XEXP (rtl, 0))
6799 && is_pseudo_reg (XEXP (rtl, 1))))
6802 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6805 /* Attach the specialized form of location attribute used for data
6806 members of struct and union types. In the special case of a
6807 FIELD_DECL node which represents a bit-field, the "offset" part
6808 of this special location descriptor must indicate the distance
6809 in bytes from the lowest-addressed byte of the containing struct
6810 or union type to the lowest-addressed byte of the "containing
6811 object" for the bit-field. (See the `field_byte_offset' function
6812 above).. For any given bit-field, the "containing object" is a
6813 hypothetical object (of some integral or enum type) within which
6814 the given bit-field lives. The type of this hypothetical
6815 "containing object" is always the same as the declared type of
6816 the individual bit-field itself (for GCC anyway... the DWARF
6817 spec doesn't actually mandate this). Note that it is the size
6818 (in bytes) of the hypothetical "containing object" which will
6819 be given in the DW_AT_byte_size attribute for this bit-field.
6820 (See the `byte_size_attribute' function below.) It is also used
6821 when calculating the value of the DW_AT_bit_offset attribute.
6822 (See the `bit_offset_attribute' function below). */
6825 add_data_member_location_attribute (die, decl)
6826 register dw_die_ref die;
6829 register unsigned long offset;
6830 register dw_loc_descr_ref loc_descr;
6831 register enum dwarf_location_atom op;
6833 if (TREE_CODE (decl) == TREE_VEC)
6834 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6836 offset = field_byte_offset (decl);
6838 /* The DWARF2 standard says that we should assume that the structure address
6839 is already on the stack, so we can specify a structure field address
6840 by using DW_OP_plus_uconst. */
6842 #ifdef MIPS_DEBUGGING_INFO
6843 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6844 correctly. It works only if we leave the offset on the stack. */
6847 op = DW_OP_plus_uconst;
6850 loc_descr = new_loc_descr (op, offset, 0);
6851 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
6854 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6855 does not have a "location" either in memory or in a register. These
6856 things can arise in GNU C when a constant is passed as an actual parameter
6857 to an inlined function. They can also arise in C++ where declared
6858 constants do not necessarily get memory "homes". */
6861 add_const_value_attribute (die, rtl)
6862 register dw_die_ref die;
6865 switch (GET_CODE (rtl))
6868 /* Note that a CONST_INT rtx could represent either an integer or a
6869 floating-point constant. A CONST_INT is used whenever the constant
6870 will fit into a single word. In all such cases, the original mode
6871 of the constant value is wiped out, and the CONST_INT rtx is
6872 assigned VOIDmode. */
6873 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
6877 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6878 floating-point constant. A CONST_DOUBLE is used whenever the
6879 constant requires more than one word in order to be adequately
6880 represented. We output CONST_DOUBLEs as blocks. */
6882 register enum machine_mode mode = GET_MODE (rtl);
6884 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
6886 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
6890 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
6894 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
6898 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
6903 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
6910 add_AT_float (die, DW_AT_const_value, length, array);
6913 add_AT_long_long (die, DW_AT_const_value,
6914 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
6919 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
6925 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
6929 /* In cases where an inlined instance of an inline function is passed
6930 the address of an `auto' variable (which is local to the caller) we
6931 can get a situation where the DECL_RTL of the artificial local
6932 variable (for the inlining) which acts as a stand-in for the
6933 corresponding formal parameter (of the inline function) will look
6934 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6935 exactly a compile-time constant expression, but it isn't the address
6936 of the (artificial) local variable either. Rather, it represents the
6937 *value* which the artificial local variable always has during its
6938 lifetime. We currently have no way to represent such quasi-constant
6939 values in Dwarf, so for now we just punt and generate nothing. */
6943 /* No other kinds of rtx should be possible here. */
6949 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6950 data attribute for a variable or a parameter. We generate the
6951 DW_AT_const_value attribute only in those cases where the given variable
6952 or parameter does not have a true "location" either in memory or in a
6953 register. This can happen (for example) when a constant is passed as an
6954 actual argument in a call to an inline function. (It's possible that
6955 these things can crop up in other ways also.) Note that one type of
6956 constant value which can be passed into an inlined function is a constant
6957 pointer. This can happen for example if an actual argument in an inlined
6958 function call evaluates to a compile-time constant address. */
6961 add_location_or_const_value_attribute (die, decl)
6962 register dw_die_ref die;
6966 register tree declared_type;
6967 register tree passed_type;
6969 if (TREE_CODE (decl) == ERROR_MARK)
6972 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
6975 /* Here we have to decide where we are going to say the parameter "lives"
6976 (as far as the debugger is concerned). We only have a couple of
6977 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6979 DECL_RTL normally indicates where the parameter lives during most of the
6980 activation of the function. If optimization is enabled however, this
6981 could be either NULL or else a pseudo-reg. Both of those cases indicate
6982 that the parameter doesn't really live anywhere (as far as the code
6983 generation parts of GCC are concerned) during most of the function's
6984 activation. That will happen (for example) if the parameter is never
6985 referenced within the function.
6987 We could just generate a location descriptor here for all non-NULL
6988 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6989 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6990 where DECL_RTL is NULL or is a pseudo-reg.
6992 Note however that we can only get away with using DECL_INCOMING_RTL as
6993 a backup substitute for DECL_RTL in certain limited cases. In cases
6994 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
6995 we can be sure that the parameter was passed using the same type as it is
6996 declared to have within the function, and that its DECL_INCOMING_RTL
6997 points us to a place where a value of that type is passed.
6999 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7000 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7001 because in these cases DECL_INCOMING_RTL points us to a value of some
7002 type which is *different* from the type of the parameter itself. Thus,
7003 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7004 such cases, the debugger would end up (for example) trying to fetch a
7005 `float' from a place which actually contains the first part of a
7006 `double'. That would lead to really incorrect and confusing
7007 output at debug-time.
7009 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7010 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7011 are a couple of exceptions however. On little-endian machines we can
7012 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7013 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7014 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7015 when (on a little-endian machine) a non-prototyped function has a
7016 parameter declared to be of type `short' or `char'. In such cases,
7017 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7018 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7019 passed `int' value. If the debugger then uses that address to fetch
7020 a `short' or a `char' (on a little-endian machine) the result will be
7021 the correct data, so we allow for such exceptional cases below.
7023 Note that our goal here is to describe the place where the given formal
7024 parameter lives during most of the function's activation (i.e. between
7025 the end of the prologue and the start of the epilogue). We'll do that
7026 as best as we can. Note however that if the given formal parameter is
7027 modified sometime during the execution of the function, then a stack
7028 backtrace (at debug-time) will show the function as having been
7029 called with the *new* value rather than the value which was
7030 originally passed in. This happens rarely enough that it is not
7031 a major problem, but it *is* a problem, and I'd like to fix it.
7033 A future version of dwarf2out.c may generate two additional
7034 attributes for any given DW_TAG_formal_parameter DIE which will
7035 describe the "passed type" and the "passed location" for the
7036 given formal parameter in addition to the attributes we now
7037 generate to indicate the "declared type" and the "active
7038 location" for each parameter. This additional set of attributes
7039 could be used by debuggers for stack backtraces. Separately, note
7040 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7041 NULL also. This happens (for example) for inlined-instances of
7042 inline function formal parameters which are never referenced.
7043 This really shouldn't be happening. All PARM_DECL nodes should
7044 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7045 doesn't currently generate these values for inlined instances of
7046 inline function parameters, so when we see such cases, we are
7047 just out-of-luck for the time being (until integrate.c
7050 /* Use DECL_RTL as the "location" unless we find something better. */
7051 rtl = DECL_RTL (decl);
7053 if (TREE_CODE (decl) == PARM_DECL)
7055 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7057 declared_type = type_main_variant (TREE_TYPE (decl));
7058 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7060 /* This decl represents a formal parameter which was optimized out.
7061 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7062 all* cases where (rtl == NULL_RTX) just below. */
7063 if (declared_type == passed_type)
7064 rtl = DECL_INCOMING_RTL (decl);
7065 else if (! BYTES_BIG_ENDIAN
7066 && TREE_CODE (declared_type) == INTEGER_TYPE
7067 && TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
7068 rtl = DECL_INCOMING_RTL (decl);
7072 if (rtl == NULL_RTX)
7075 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7076 #ifdef LEAF_REG_REMAP
7078 leaf_renumber_regs_insn (rtl);
7081 switch (GET_CODE (rtl))
7084 /* The address of a variable that was optimized away; don't emit
7095 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7096 add_const_value_attribute (die, rtl);
7103 add_AT_location_description (die, DW_AT_location, rtl);
7111 /* Generate an DW_AT_name attribute given some string value to be included as
7112 the value of the attribute. */
7115 add_name_attribute (die, name_string)
7116 register dw_die_ref die;
7117 register char *name_string;
7119 if (name_string != NULL && *name_string != 0)
7120 add_AT_string (die, DW_AT_name, name_string);
7123 /* Given a tree node describing an array bound (either lower or upper) output
7124 a representation for that bound. */
7127 add_bound_info (subrange_die, bound_attr, bound)
7128 register dw_die_ref subrange_die;
7129 register enum dwarf_attribute bound_attr;
7130 register tree bound;
7132 register unsigned bound_value = 0;
7134 /* If this is an Ada unconstrained array type, then don't emit any debug
7135 info because the array bounds are unknown. They are parameterized when
7136 the type is instantiated. */
7137 if (contains_placeholder_p (bound))
7140 switch (TREE_CODE (bound))
7145 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7147 bound_value = TREE_INT_CST_LOW (bound);
7148 if (bound_attr == DW_AT_lower_bound
7149 && ((is_c_family () && bound_value == 0)
7150 || (is_fortran () && bound_value == 1)))
7151 /* use the default */;
7153 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7158 case NON_LVALUE_EXPR:
7159 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7163 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7164 access the upper bound values may be bogus. If they refer to a
7165 register, they may only describe how to get at these values at the
7166 points in the generated code right after they have just been
7167 computed. Worse yet, in the typical case, the upper bound values
7168 will not even *be* computed in the optimized code (though the
7169 number of elements will), so these SAVE_EXPRs are entirely
7170 bogus. In order to compensate for this fact, we check here to see
7171 if optimization is enabled, and if so, we don't add an attribute
7172 for the (unknown and unknowable) upper bound. This should not
7173 cause too much trouble for existing (stupid?) debuggers because
7174 they have to deal with empty upper bounds location descriptions
7175 anyway in order to be able to deal with incomplete array types.
7176 Of course an intelligent debugger (GDB?) should be able to
7177 comprehend that a missing upper bound specification in a array
7178 type used for a storage class `auto' local array variable
7179 indicates that the upper bound is both unknown (at compile- time)
7180 and unknowable (at run-time) due to optimization.
7182 We assume that a MEM rtx is safe because gcc wouldn't put the
7183 value there unless it was going to be used repeatedly in the
7184 function, i.e. for cleanups. */
7185 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7187 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7188 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7189 register rtx loc = SAVE_EXPR_RTL (bound);
7191 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7192 it references an outer function's frame. */
7194 if (GET_CODE (loc) == MEM)
7196 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7198 if (XEXP (loc, 0) != new_addr)
7199 loc = gen_rtx (MEM, GET_MODE (loc), new_addr);
7202 add_AT_flag (decl_die, DW_AT_artificial, 1);
7203 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7204 add_AT_location_description (decl_die, DW_AT_location, loc);
7205 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7208 /* Else leave out the attribute. */
7214 /* ??? These types of bounds can be created by the Ada front end,
7215 and it isn't clear how to emit debug info for them. */
7223 /* Note that the block of subscript information for an array type also
7224 includes information about the element type of type given array type. */
7227 add_subscript_info (type_die, type)
7228 register dw_die_ref type_die;
7231 #ifndef MIPS_DEBUGGING_INFO
7232 register unsigned dimension_number;
7234 register tree lower, upper;
7235 register dw_die_ref subrange_die;
7237 /* The GNU compilers represent multidimensional array types as sequences of
7238 one dimensional array types whose element types are themselves array
7239 types. Here we squish that down, so that each multidimensional array
7240 type gets only one array_type DIE in the Dwarf debugging info. The draft
7241 Dwarf specification say that we are allowed to do this kind of
7242 compression in C (because there is no difference between an array or
7243 arrays and a multidimensional array in C) but for other source languages
7244 (e.g. Ada) we probably shouldn't do this. */
7246 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7247 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7248 We work around this by disabling this feature. See also
7249 gen_array_type_die. */
7250 #ifndef MIPS_DEBUGGING_INFO
7251 for (dimension_number = 0;
7252 TREE_CODE (type) == ARRAY_TYPE;
7253 type = TREE_TYPE (type), dimension_number++)
7256 register tree domain = TYPE_DOMAIN (type);
7258 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7259 and (in GNU C only) variable bounds. Handle all three forms
7261 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7264 /* We have an array type with specified bounds. */
7265 lower = TYPE_MIN_VALUE (domain);
7266 upper = TYPE_MAX_VALUE (domain);
7268 /* define the index type. */
7269 if (TREE_TYPE (domain))
7271 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7272 TREE_TYPE field. We can't emit debug info for this
7273 because it is an unnamed integral type. */
7274 if (TREE_CODE (domain) == INTEGER_TYPE
7275 && TYPE_NAME (domain) == NULL_TREE
7276 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7277 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7280 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7284 /* ??? If upper is NULL, the array has unspecified length,
7285 but it does have a lower bound. This happens with Fortran
7287 Since the debugger is definitely going to need to know N
7288 to produce useful results, go ahead and output the lower
7289 bound solo, and hope the debugger can cope. */
7291 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7293 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7296 /* We have an array type with an unspecified length. The DWARF-2
7297 spec does not say how to handle this; let's just leave out the
7302 #ifndef MIPS_DEBUGGING_INFO
7308 add_byte_size_attribute (die, tree_node)
7310 register tree tree_node;
7312 register unsigned size;
7314 switch (TREE_CODE (tree_node))
7322 case QUAL_UNION_TYPE:
7323 size = int_size_in_bytes (tree_node);
7326 /* For a data member of a struct or union, the DW_AT_byte_size is
7327 generally given as the number of bytes normally allocated for an
7328 object of the *declared* type of the member itself. This is true
7329 even for bit-fields. */
7330 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7336 /* Note that `size' might be -1 when we get to this point. If it is, that
7337 indicates that the byte size of the entity in question is variable. We
7338 have no good way of expressing this fact in Dwarf at the present time,
7339 so just let the -1 pass on through. */
7341 add_AT_unsigned (die, DW_AT_byte_size, size);
7344 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7345 which specifies the distance in bits from the highest order bit of the
7346 "containing object" for the bit-field to the highest order bit of the
7349 For any given bit-field, the "containing object" is a hypothetical
7350 object (of some integral or enum type) within which the given bit-field
7351 lives. The type of this hypothetical "containing object" is always the
7352 same as the declared type of the individual bit-field itself. The
7353 determination of the exact location of the "containing object" for a
7354 bit-field is rather complicated. It's handled by the
7355 `field_byte_offset' function (above).
7357 Note that it is the size (in bytes) of the hypothetical "containing object"
7358 which will be given in the DW_AT_byte_size attribute for this bit-field.
7359 (See `byte_size_attribute' above). */
7362 add_bit_offset_attribute (die, decl)
7363 register dw_die_ref die;
7366 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7367 register tree type = DECL_BIT_FIELD_TYPE (decl);
7368 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7369 register unsigned bitpos_int;
7370 register unsigned highest_order_object_bit_offset;
7371 register unsigned highest_order_field_bit_offset;
7372 register unsigned bit_offset;
7374 /* Must be a field and a bit field. */
7376 || TREE_CODE (decl) != FIELD_DECL)
7379 /* We can't yet handle bit-fields whose offsets are variable, so if we
7380 encounter such things, just return without generating any attribute
7382 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7385 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7387 /* Note that the bit offset is always the distance (in bits) from the
7388 highest-order bit of the "containing object" to the highest-order bit of
7389 the bit-field itself. Since the "high-order end" of any object or field
7390 is different on big-endian and little-endian machines, the computation
7391 below must take account of these differences. */
7392 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7393 highest_order_field_bit_offset = bitpos_int;
7395 if (! BYTES_BIG_ENDIAN)
7397 highest_order_field_bit_offset
7398 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7400 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7404 = (! BYTES_BIG_ENDIAN
7405 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7406 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7408 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7411 /* For a FIELD_DECL node which represents a bit field, output an attribute
7412 which specifies the length in bits of the given field. */
7415 add_bit_size_attribute (die, decl)
7416 register dw_die_ref die;
7419 /* Must be a field and a bit field. */
7420 if (TREE_CODE (decl) != FIELD_DECL
7421 || ! DECL_BIT_FIELD_TYPE (decl))
7423 add_AT_unsigned (die, DW_AT_bit_size,
7424 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7427 /* If the compiled language is ANSI C, then add a 'prototyped'
7428 attribute, if arg types are given for the parameters of a function. */
7431 add_prototyped_attribute (die, func_type)
7432 register dw_die_ref die;
7433 register tree func_type;
7435 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7436 && TYPE_ARG_TYPES (func_type) != NULL)
7437 add_AT_flag (die, DW_AT_prototyped, 1);
7441 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7442 by looking in either the type declaration or object declaration
7446 add_abstract_origin_attribute (die, origin)
7447 register dw_die_ref die;
7448 register tree origin;
7450 dw_die_ref origin_die = NULL;
7451 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7452 origin_die = lookup_decl_die (origin);
7453 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7454 origin_die = lookup_type_die (origin);
7456 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7459 /* We do not currently support the pure_virtual attribute. */
7462 add_pure_or_virtual_attribute (die, func_decl)
7463 register dw_die_ref die;
7464 register tree func_decl;
7466 if (DECL_VINDEX (func_decl))
7468 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7469 add_AT_loc (die, DW_AT_vtable_elem_location,
7470 new_loc_descr (DW_OP_constu,
7471 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7474 /* GNU extension: Record what type this method came from originally. */
7475 if (debug_info_level > DINFO_LEVEL_TERSE)
7476 add_AT_die_ref (die, DW_AT_containing_type,
7477 lookup_type_die (DECL_CONTEXT (func_decl)));
7481 /* Add source coordinate attributes for the given decl. */
7484 add_src_coords_attributes (die, decl)
7485 register dw_die_ref die;
7488 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7490 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7491 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7494 /* Add an DW_AT_name attribute and source coordinate attribute for the
7495 given decl, but only if it actually has a name. */
7498 add_name_and_src_coords_attributes (die, decl)
7499 register dw_die_ref die;
7502 register tree decl_name;
7504 decl_name = DECL_NAME (decl);
7505 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7507 add_name_attribute (die, dwarf2_name (decl, 0));
7508 add_src_coords_attributes (die, decl);
7509 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7510 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7511 add_AT_string (die, DW_AT_MIPS_linkage_name,
7512 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7516 /* Push a new declaration scope. */
7519 push_decl_scope (scope)
7522 tree containing_scope;
7525 /* Make room in the decl_scope_table, if necessary. */
7526 if (decl_scope_table_allocated == decl_scope_depth)
7528 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7530 = (decl_scope_node *) xrealloc (decl_scope_table,
7531 (decl_scope_table_allocated
7532 * sizeof (decl_scope_node)));
7535 decl_scope_table[decl_scope_depth].scope = scope;
7537 /* Sometimes, while recursively emitting subtypes within a class type,
7538 we end up recuring on a subtype at a higher level then the current
7539 subtype. In such a case, we need to search the decl_scope_table to
7540 find the parent of this subtype. */
7542 if (TREE_CODE_CLASS (TREE_CODE (scope)) == 't')
7543 containing_scope = TYPE_CONTEXT (scope);
7545 containing_scope = NULL_TREE;
7547 /* The normal case. */
7548 if (decl_scope_depth == 0
7549 || containing_scope == NULL_TREE
7550 /* Ignore namespaces for the moment. */
7551 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7552 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7553 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7556 /* We need to search for the containing_scope. */
7557 for (i = 0; i < decl_scope_depth; i++)
7558 if (decl_scope_table[i].scope == containing_scope)
7561 if (i == decl_scope_depth)
7564 decl_scope_table[decl_scope_depth].previous = i;
7570 /* Return the DIE for the scope that immediately contains this declaration. */
7573 scope_die_for (t, context_die)
7575 register dw_die_ref context_die;
7577 register dw_die_ref scope_die = NULL;
7578 register tree containing_scope;
7581 /* Walk back up the declaration tree looking for a place to define
7583 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7584 containing_scope = TYPE_CONTEXT (t);
7585 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7586 containing_scope = decl_class_context (t);
7588 containing_scope = DECL_CONTEXT (t);
7590 /* Ignore namespaces for the moment. */
7591 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7592 containing_scope = NULL_TREE;
7594 /* Function-local tags and functions get stuck in limbo until they are
7595 fixed up by decls_for_scope. */
7596 if (context_die == NULL && containing_scope != NULL_TREE
7597 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7600 if (containing_scope == NULL_TREE)
7601 scope_die = comp_unit_die;
7604 for (i = decl_scope_depth - 1, scope_die = context_die;
7605 i >= 0 && decl_scope_table[i].scope != containing_scope;
7606 (scope_die = scope_die->die_parent,
7607 i = decl_scope_table[i].previous))
7610 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7611 does it try to handle types defined by TYPE_DECLs. Such types
7612 thus have an incorrect TYPE_CONTEXT, which points to the block
7613 they were originally defined in, instead of the current block
7614 created by function inlining. We try to detect that here and
7617 if (i < 0 && scope_die == comp_unit_die
7618 && TREE_CODE (containing_scope) == BLOCK
7619 && is_tagged_type (t)
7620 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7621 == containing_scope))
7623 scope_die = context_die;
7624 /* Since the checks below are no longer applicable. */
7630 if (scope_die != comp_unit_die
7631 || TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7633 if (debug_info_level > DINFO_LEVEL_TERSE
7634 && !TREE_ASM_WRITTEN (containing_scope))
7642 /* Pop a declaration scope. */
7646 if (decl_scope_depth <= 0)
7651 /* Many forms of DIEs require a "type description" attribute. This
7652 routine locates the proper "type descriptor" die for the type given
7653 by 'type', and adds an DW_AT_type attribute below the given die. */
7656 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7657 register dw_die_ref object_die;
7659 register int decl_const;
7660 register int decl_volatile;
7661 register dw_die_ref context_die;
7663 register enum tree_code code = TREE_CODE (type);
7664 register dw_die_ref type_die = NULL;
7666 /* ??? If this type is an unnamed subrange type of an integral or
7667 floating-point type, use the inner type. This is because we have no
7668 support for unnamed types in base_type_die. This can happen if this is
7669 an Ada subrange type. Correct solution is emit a subrange type die. */
7670 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7671 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7672 type = TREE_TYPE (type), code = TREE_CODE (type);
7674 if (code == ERROR_MARK)
7677 /* Handle a special case. For functions whose return type is void, we
7678 generate *no* type attribute. (Note that no object may have type
7679 `void', so this only applies to function return types). */
7680 if (code == VOID_TYPE)
7683 type_die = modified_type_die (type,
7684 decl_const || TYPE_READONLY (type),
7685 decl_volatile || TYPE_VOLATILE (type),
7687 if (type_die != NULL)
7688 add_AT_die_ref (object_die, DW_AT_type, type_die);
7691 /* Given a tree pointer to a struct, class, union, or enum type node, return
7692 a pointer to the (string) tag name for the given type, or zero if the type
7693 was declared without a tag. */
7699 register char *name = 0;
7701 if (TYPE_NAME (type) != 0)
7703 register tree t = 0;
7705 /* Find the IDENTIFIER_NODE for the type name. */
7706 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7707 t = TYPE_NAME (type);
7709 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7710 a TYPE_DECL node, regardless of whether or not a `typedef' was
7712 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7713 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7714 t = DECL_NAME (TYPE_NAME (type));
7716 /* Now get the name as a string, or invent one. */
7718 name = IDENTIFIER_POINTER (t);
7721 return (name == 0 || *name == '\0') ? 0 : name;
7724 /* Return the type associated with a data member, make a special check
7725 for bit field types. */
7728 member_declared_type (member)
7729 register tree member;
7731 return (DECL_BIT_FIELD_TYPE (member)
7732 ? DECL_BIT_FIELD_TYPE (member)
7733 : TREE_TYPE (member));
7736 /* Get the decl's label, as described by its RTL. This may be different
7737 from the DECL_NAME name used in the source file. */
7741 decl_start_label (decl)
7746 x = DECL_RTL (decl);
7747 if (GET_CODE (x) != MEM)
7751 if (GET_CODE (x) != SYMBOL_REF)
7754 fnname = XSTR (x, 0);
7759 /* These routines generate the internal representation of the DIE's for
7760 the compilation unit. Debugging information is collected by walking
7761 the declaration trees passed in from dwarf2out_decl(). */
7764 gen_array_type_die (type, context_die)
7766 register dw_die_ref context_die;
7768 register dw_die_ref scope_die = scope_die_for (type, context_die);
7769 register dw_die_ref array_die;
7770 register tree element_type;
7772 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7773 the inner array type comes before the outer array type. Thus we must
7774 call gen_type_die before we call new_die. See below also. */
7775 #ifdef MIPS_DEBUGGING_INFO
7776 gen_type_die (TREE_TYPE (type), context_die);
7779 array_die = new_die (DW_TAG_array_type, scope_die);
7782 /* We default the array ordering. SDB will probably do
7783 the right things even if DW_AT_ordering is not present. It's not even
7784 an issue until we start to get into multidimensional arrays anyway. If
7785 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7786 then we'll have to put the DW_AT_ordering attribute back in. (But if
7787 and when we find out that we need to put these in, we will only do so
7788 for multidimensional arrays. */
7789 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
7792 #ifdef MIPS_DEBUGGING_INFO
7793 /* The SGI compilers handle arrays of unknown bound by setting
7794 AT_declaration and not emitting any subrange DIEs. */
7795 if (! TYPE_DOMAIN (type))
7796 add_AT_unsigned (array_die, DW_AT_declaration, 1);
7799 add_subscript_info (array_die, type);
7801 equate_type_number_to_die (type, array_die);
7803 /* Add representation of the type of the elements of this array type. */
7804 element_type = TREE_TYPE (type);
7806 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7807 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7808 We work around this by disabling this feature. See also
7809 add_subscript_info. */
7810 #ifndef MIPS_DEBUGGING_INFO
7811 while (TREE_CODE (element_type) == ARRAY_TYPE)
7812 element_type = TREE_TYPE (element_type);
7814 gen_type_die (element_type, context_die);
7817 add_type_attribute (array_die, element_type, 0, 0, context_die);
7821 gen_set_type_die (type, context_die)
7823 register dw_die_ref context_die;
7825 register dw_die_ref type_die
7826 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
7828 equate_type_number_to_die (type, type_die);
7829 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
7834 gen_entry_point_die (decl, context_die)
7836 register dw_die_ref context_die;
7838 register tree origin = decl_ultimate_origin (decl);
7839 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
7841 add_abstract_origin_attribute (decl_die, origin);
7844 add_name_and_src_coords_attributes (decl_die, decl);
7845 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
7849 if (DECL_ABSTRACT (decl))
7850 equate_decl_number_to_die (decl, decl_die);
7852 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
7856 /* Remember a type in the pending_types_list. */
7862 if (pending_types == pending_types_allocated)
7864 pending_types_allocated += PENDING_TYPES_INCREMENT;
7866 = (tree *) xrealloc (pending_types_list,
7867 sizeof (tree) * pending_types_allocated);
7870 pending_types_list[pending_types++] = type;
7873 /* Output any pending types (from the pending_types list) which we can output
7874 now (taking into account the scope that we are working on now).
7876 For each type output, remove the given type from the pending_types_list
7877 *before* we try to output it. */
7880 output_pending_types_for_scope (context_die)
7881 register dw_die_ref context_die;
7885 while (pending_types)
7888 type = pending_types_list[pending_types];
7889 gen_type_die (type, context_die);
7890 if (!TREE_ASM_WRITTEN (type))
7895 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7898 gen_inlined_enumeration_type_die (type, context_die)
7900 register dw_die_ref context_die;
7902 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
7903 scope_die_for (type, context_die));
7905 if (!TREE_ASM_WRITTEN (type))
7907 add_abstract_origin_attribute (type_die, type);
7910 /* Generate a DIE to represent an inlined instance of a structure type. */
7913 gen_inlined_structure_type_die (type, context_die)
7915 register dw_die_ref context_die;
7917 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
7918 scope_die_for (type, context_die));
7920 if (!TREE_ASM_WRITTEN (type))
7922 add_abstract_origin_attribute (type_die, type);
7925 /* Generate a DIE to represent an inlined instance of a union type. */
7928 gen_inlined_union_type_die (type, context_die)
7930 register dw_die_ref context_die;
7932 register dw_die_ref type_die = new_die (DW_TAG_union_type,
7933 scope_die_for (type, context_die));
7935 if (!TREE_ASM_WRITTEN (type))
7937 add_abstract_origin_attribute (type_die, type);
7940 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7941 include all of the information about the enumeration values also. Each
7942 enumerated type name/value is listed as a child of the enumerated type
7946 gen_enumeration_type_die (type, context_die)
7948 register dw_die_ref context_die;
7950 register dw_die_ref type_die = lookup_type_die (type);
7952 if (type_die == NULL)
7954 type_die = new_die (DW_TAG_enumeration_type,
7955 scope_die_for (type, context_die));
7956 equate_type_number_to_die (type, type_die);
7957 add_name_attribute (type_die, type_tag (type));
7959 else if (! TYPE_SIZE (type))
7962 remove_AT (type_die, DW_AT_declaration);
7964 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7965 given enum type is incomplete, do not generate the DW_AT_byte_size
7966 attribute or the DW_AT_element_list attribute. */
7967 if (TYPE_SIZE (type))
7971 TREE_ASM_WRITTEN (type) = 1;
7972 add_byte_size_attribute (type_die, type);
7973 if (TYPE_STUB_DECL (type) != NULL_TREE)
7974 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
7976 /* If the first reference to this type was as the return type of an
7977 inline function, then it may not have a parent. Fix this now. */
7978 if (type_die->die_parent == NULL)
7979 add_child_die (scope_die_for (type, context_die), type_die);
7981 for (link = TYPE_FIELDS (type);
7982 link != NULL; link = TREE_CHAIN (link))
7984 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
7986 add_name_attribute (enum_die,
7987 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
7988 add_AT_unsigned (enum_die, DW_AT_const_value,
7989 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
7993 add_AT_flag (type_die, DW_AT_declaration, 1);
7997 /* Generate a DIE to represent either a real live formal parameter decl or to
7998 represent just the type of some formal parameter position in some function
8001 Note that this routine is a bit unusual because its argument may be a
8002 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8003 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8004 node. If it's the former then this function is being called to output a
8005 DIE to represent a formal parameter object (or some inlining thereof). If
8006 it's the latter, then this function is only being called to output a
8007 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8008 argument type of some subprogram type. */
8011 gen_formal_parameter_die (node, context_die)
8013 register dw_die_ref context_die;
8015 register dw_die_ref parm_die
8016 = new_die (DW_TAG_formal_parameter, context_die);
8017 register tree origin;
8019 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8022 origin = decl_ultimate_origin (node);
8024 add_abstract_origin_attribute (parm_die, origin);
8027 add_name_and_src_coords_attributes (parm_die, node);
8028 add_type_attribute (parm_die, TREE_TYPE (node),
8029 TREE_READONLY (node),
8030 TREE_THIS_VOLATILE (node),
8032 if (DECL_ARTIFICIAL (node))
8033 add_AT_flag (parm_die, DW_AT_artificial, 1);
8036 equate_decl_number_to_die (node, parm_die);
8037 if (! DECL_ABSTRACT (node))
8038 add_location_or_const_value_attribute (parm_die, node);
8043 /* We were called with some kind of a ..._TYPE node. */
8044 add_type_attribute (parm_die, node, 0, 0, context_die);
8054 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8055 at the end of an (ANSI prototyped) formal parameters list. */
8058 gen_unspecified_parameters_die (decl_or_type, context_die)
8059 register tree decl_or_type;
8060 register dw_die_ref context_die;
8062 new_die (DW_TAG_unspecified_parameters, context_die);
8065 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8066 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8067 parameters as specified in some function type specification (except for
8068 those which appear as part of a function *definition*).
8070 Note we must be careful here to output all of the parameter DIEs before*
8071 we output any DIEs needed to represent the types of the formal parameters.
8072 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8073 non-parameter DIE it sees ends the formal parameter list. */
8076 gen_formal_types_die (function_or_method_type, context_die)
8077 register tree function_or_method_type;
8078 register dw_die_ref context_die;
8081 register tree formal_type = NULL;
8082 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8085 /* In the case where we are generating a formal types list for a C++
8086 non-static member function type, skip over the first thing on the
8087 TYPE_ARG_TYPES list because it only represents the type of the hidden
8088 `this pointer'. The debugger should be able to figure out (without
8089 being explicitly told) that this non-static member function type takes a
8090 `this pointer' and should be able to figure what the type of that hidden
8091 parameter is from the DW_AT_member attribute of the parent
8092 DW_TAG_subroutine_type DIE. */
8093 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8094 first_parm_type = TREE_CHAIN (first_parm_type);
8097 /* Make our first pass over the list of formal parameter types and output a
8098 DW_TAG_formal_parameter DIE for each one. */
8099 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8101 register dw_die_ref parm_die;
8103 formal_type = TREE_VALUE (link);
8104 if (formal_type == void_type_node)
8107 /* Output a (nameless) DIE to represent the formal parameter itself. */
8108 parm_die = gen_formal_parameter_die (formal_type, context_die);
8109 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8110 && link == first_parm_type)
8111 add_AT_flag (parm_die, DW_AT_artificial, 1);
8114 /* If this function type has an ellipsis, add a
8115 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8116 if (formal_type != void_type_node)
8117 gen_unspecified_parameters_die (function_or_method_type, context_die);
8119 /* Make our second (and final) pass over the list of formal parameter types
8120 and output DIEs to represent those types (as necessary). */
8121 for (link = TYPE_ARG_TYPES (function_or_method_type);
8123 link = TREE_CHAIN (link))
8125 formal_type = TREE_VALUE (link);
8126 if (formal_type == void_type_node)
8129 gen_type_die (formal_type, context_die);
8133 /* Generate a DIE to represent a declared function (either file-scope or
8137 gen_subprogram_die (decl, context_die)
8139 register dw_die_ref context_die;
8141 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8142 register tree origin = decl_ultimate_origin (decl);
8143 register dw_die_ref subr_die;
8144 register rtx fp_reg;
8145 register tree fn_arg_types;
8146 register tree outer_scope;
8147 register dw_die_ref old_die = lookup_decl_die (decl);
8148 register int declaration
8149 = (current_function_decl != decl
8151 && (context_die->die_tag == DW_TAG_structure_type
8152 || context_die->die_tag == DW_TAG_union_type)));
8156 subr_die = new_die (DW_TAG_subprogram, context_die);
8157 add_abstract_origin_attribute (subr_die, origin);
8159 else if (old_die && DECL_ABSTRACT (decl)
8160 && get_AT_unsigned (old_die, DW_AT_inline))
8162 /* This must be a redefinition of an extern inline function.
8163 We can just reuse the old die here. */
8166 /* Clear out the inlined attribute and parm types. */
8167 remove_AT (subr_die, DW_AT_inline);
8168 remove_children (subr_die);
8172 register unsigned file_index
8173 = lookup_filename (DECL_SOURCE_FILE (decl));
8175 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8178 /* If the definition comes from the same place as the declaration,
8179 maybe use the old DIE. We always want the DIE for this function
8180 that has the *_pc attributes to be under comp_unit_die so the
8181 debugger can find it. For inlines, that is the concrete instance,
8182 so we can use the old DIE here. For non-inline methods, we want a
8183 specification DIE at toplevel, so we need a new DIE. For local
8184 class methods, this does not apply. */
8185 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8186 || context_die == NULL)
8187 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8188 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8189 == DECL_SOURCE_LINE (decl)))
8193 /* Clear out the declaration attribute and the parm types. */
8194 remove_AT (subr_die, DW_AT_declaration);
8195 remove_children (subr_die);
8199 subr_die = new_die (DW_TAG_subprogram, context_die);
8200 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8201 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8202 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8203 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8204 != DECL_SOURCE_LINE (decl))
8206 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8211 register dw_die_ref scope_die;
8213 if (DECL_CONTEXT (decl))
8214 scope_die = scope_die_for (decl, context_die);
8216 /* Don't put block extern declarations under comp_unit_die. */
8217 scope_die = context_die;
8219 subr_die = new_die (DW_TAG_subprogram, scope_die);
8221 if (TREE_PUBLIC (decl))
8222 add_AT_flag (subr_die, DW_AT_external, 1);
8224 add_name_and_src_coords_attributes (subr_die, decl);
8225 if (debug_info_level > DINFO_LEVEL_TERSE)
8227 register tree type = TREE_TYPE (decl);
8229 add_prototyped_attribute (subr_die, type);
8230 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8233 add_pure_or_virtual_attribute (subr_die, decl);
8234 if (DECL_ARTIFICIAL (decl))
8235 add_AT_flag (subr_die, DW_AT_artificial, 1);
8236 if (TREE_PROTECTED (decl))
8237 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8238 else if (TREE_PRIVATE (decl))
8239 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8244 add_AT_flag (subr_die, DW_AT_declaration, 1);
8246 /* The first time we see a member function, it is in the context of
8247 the class to which it belongs. We make sure of this by emitting
8248 the class first. The next time is the definition, which is
8249 handled above. The two may come from the same source text. */
8250 if (DECL_CONTEXT (decl))
8251 equate_decl_number_to_die (decl, subr_die);
8253 else if (DECL_ABSTRACT (decl))
8255 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8256 but not for extern inline functions. We can't get this completely
8257 correct because information about whether the function was declared
8258 inline is not saved anywhere. */
8259 if (DECL_DEFER_OUTPUT (decl))
8261 if (DECL_INLINE (decl))
8262 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8264 add_AT_unsigned (subr_die, DW_AT_inline,
8265 DW_INL_declared_not_inlined);
8267 else if (DECL_INLINE (decl))
8268 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8272 equate_decl_number_to_die (decl, subr_die);
8274 else if (!DECL_EXTERNAL (decl))
8276 if (origin == NULL_TREE)
8277 equate_decl_number_to_die (decl, subr_die);
8279 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8280 current_funcdef_number);
8281 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8282 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8283 current_funcdef_number);
8284 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8286 add_pubname (decl, subr_die);
8287 add_arange (decl, subr_die);
8289 #ifdef MIPS_DEBUGGING_INFO
8290 /* Add a reference to the FDE for this routine. */
8291 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8294 /* Define the "frame base" location for this routine. We use the
8295 frame pointer or stack pointer registers, since the RTL for local
8296 variables is relative to one of them. */
8298 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8299 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8302 /* ??? This fails for nested inline functions, because context_display
8303 is not part of the state saved/restored for inline functions. */
8304 if (current_function_needs_context)
8305 add_AT_location_description (subr_die, DW_AT_static_link,
8306 lookup_static_chain (decl));
8310 /* Now output descriptions of the arguments for this function. This gets
8311 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8312 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8313 `...' at the end of the formal parameter list. In order to find out if
8314 there was a trailing ellipsis or not, we must instead look at the type
8315 associated with the FUNCTION_DECL. This will be a node of type
8316 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8317 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8318 an ellipsis at the end. */
8319 push_decl_scope (decl);
8321 /* In the case where we are describing a mere function declaration, all we
8322 need to do here (and all we *can* do here) is to describe the *types* of
8323 its formal parameters. */
8324 if (debug_info_level <= DINFO_LEVEL_TERSE)
8326 else if (declaration)
8327 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8330 /* Generate DIEs to represent all known formal parameters */
8331 register tree arg_decls = DECL_ARGUMENTS (decl);
8334 /* When generating DIEs, generate the unspecified_parameters DIE
8335 instead if we come across the arg "__builtin_va_alist" */
8336 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8337 if (TREE_CODE (parm) == PARM_DECL)
8339 if (DECL_NAME (parm)
8340 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8341 "__builtin_va_alist"))
8342 gen_unspecified_parameters_die (parm, subr_die);
8344 gen_decl_die (parm, subr_die);
8347 /* Decide whether we need a unspecified_parameters DIE at the end.
8348 There are 2 more cases to do this for: 1) the ansi ... declaration -
8349 this is detectable when the end of the arg list is not a
8350 void_type_node 2) an unprototyped function declaration (not a
8351 definition). This just means that we have no info about the
8352 parameters at all. */
8353 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8354 if (fn_arg_types != NULL)
8356 /* this is the prototyped case, check for ... */
8357 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8358 gen_unspecified_parameters_die (decl, subr_die);
8360 else if (DECL_INITIAL (decl) == NULL_TREE)
8361 gen_unspecified_parameters_die (decl, subr_die);
8364 /* Output Dwarf info for all of the stuff within the body of the function
8365 (if it has one - it may be just a declaration). */
8366 outer_scope = DECL_INITIAL (decl);
8368 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8369 node created to represent a function. This outermost BLOCK actually
8370 represents the outermost binding contour for the function, i.e. the
8371 contour in which the function's formal parameters and labels get
8372 declared. Curiously, it appears that the front end doesn't actually
8373 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8374 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8375 list for the function instead.) The BLOCK_VARS list for the
8376 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8377 the function however, and we output DWARF info for those in
8378 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8379 node representing the function's outermost pair of curly braces, and
8380 any blocks used for the base and member initializers of a C++
8381 constructor function. */
8382 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8384 current_function_has_inlines = 0;
8385 decls_for_scope (outer_scope, subr_die, 0);
8387 #if 0 && defined (MIPS_DEBUGGING_INFO)
8388 if (current_function_has_inlines)
8390 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8391 if (! comp_unit_has_inlines)
8393 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8394 comp_unit_has_inlines = 1;
8403 /* Generate a DIE to represent a declared data object. */
8406 gen_variable_die (decl, context_die)
8408 register dw_die_ref context_die;
8410 register tree origin = decl_ultimate_origin (decl);
8411 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8413 dw_die_ref old_die = lookup_decl_die (decl);
8415 = (DECL_EXTERNAL (decl)
8416 || current_function_decl != decl_function_context (decl)
8417 || context_die->die_tag == DW_TAG_structure_type
8418 || context_die->die_tag == DW_TAG_union_type);
8421 add_abstract_origin_attribute (var_die, origin);
8422 /* Loop unrolling can create multiple blocks that refer to the same
8423 static variable, so we must test for the DW_AT_declaration flag. */
8424 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8425 copy decls and set the DECL_ABSTRACT flag on them instead of
8427 else if (old_die && TREE_STATIC (decl)
8428 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8430 /* ??? This is an instantiation of a C++ class level static. */
8431 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8432 if (DECL_NAME (decl))
8434 register unsigned file_index
8435 = lookup_filename (DECL_SOURCE_FILE (decl));
8437 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8438 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8440 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8441 != DECL_SOURCE_LINE (decl))
8443 add_AT_unsigned (var_die, DW_AT_decl_line,
8444 DECL_SOURCE_LINE (decl));
8449 add_name_and_src_coords_attributes (var_die, decl);
8450 add_type_attribute (var_die, TREE_TYPE (decl),
8451 TREE_READONLY (decl),
8452 TREE_THIS_VOLATILE (decl), context_die);
8454 if (TREE_PUBLIC (decl))
8455 add_AT_flag (var_die, DW_AT_external, 1);
8457 if (DECL_ARTIFICIAL (decl))
8458 add_AT_flag (var_die, DW_AT_artificial, 1);
8460 if (TREE_PROTECTED (decl))
8461 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8463 else if (TREE_PRIVATE (decl))
8464 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8468 add_AT_flag (var_die, DW_AT_declaration, 1);
8470 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8471 equate_decl_number_to_die (decl, var_die);
8473 if (! declaration && ! DECL_ABSTRACT (decl))
8475 equate_decl_number_to_die (decl, var_die);
8476 add_location_or_const_value_attribute (var_die, decl);
8477 add_pubname (decl, var_die);
8481 /* Generate a DIE to represent a label identifier. */
8484 gen_label_die (decl, context_die)
8486 register dw_die_ref context_die;
8488 register tree origin = decl_ultimate_origin (decl);
8489 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8491 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8492 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8495 add_abstract_origin_attribute (lbl_die, origin);
8497 add_name_and_src_coords_attributes (lbl_die, decl);
8499 if (DECL_ABSTRACT (decl))
8500 equate_decl_number_to_die (decl, lbl_die);
8503 insn = DECL_RTL (decl);
8504 if (GET_CODE (insn) == CODE_LABEL)
8506 /* When optimization is enabled (via -O) some parts of the compiler
8507 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8508 represent source-level labels which were explicitly declared by
8509 the user. This really shouldn't be happening though, so catch
8510 it if it ever does happen. */
8511 if (INSN_DELETED_P (insn))
8514 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8515 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8516 (unsigned) INSN_UID (insn));
8517 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8522 /* Generate a DIE for a lexical block. */
8525 gen_lexical_block_die (stmt, context_die, depth)
8527 register dw_die_ref context_die;
8530 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8531 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8533 if (! BLOCK_ABSTRACT (stmt))
8535 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8537 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8538 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8539 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8542 push_decl_scope (stmt);
8543 decls_for_scope (stmt, stmt_die, depth);
8547 /* Generate a DIE for an inlined subprogram. */
8550 gen_inlined_subroutine_die (stmt, context_die, depth)
8552 register dw_die_ref context_die;
8555 if (! BLOCK_ABSTRACT (stmt))
8557 register dw_die_ref subr_die
8558 = new_die (DW_TAG_inlined_subroutine, context_die);
8559 register tree decl = block_ultimate_origin (stmt);
8560 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8562 add_abstract_origin_attribute (subr_die, decl);
8563 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8565 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8566 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8567 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8568 push_decl_scope (decl);
8569 decls_for_scope (stmt, subr_die, depth);
8571 current_function_has_inlines = 1;
8575 /* Generate a DIE for a field in a record, or structure. */
8578 gen_field_die (decl, context_die)
8580 register dw_die_ref context_die;
8582 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8584 add_name_and_src_coords_attributes (decl_die, decl);
8585 add_type_attribute (decl_die, member_declared_type (decl),
8586 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8589 /* If this is a bit field... */
8590 if (DECL_BIT_FIELD_TYPE (decl))
8592 add_byte_size_attribute (decl_die, decl);
8593 add_bit_size_attribute (decl_die, decl);
8594 add_bit_offset_attribute (decl_die, decl);
8597 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8598 add_data_member_location_attribute (decl_die, decl);
8600 if (DECL_ARTIFICIAL (decl))
8601 add_AT_flag (decl_die, DW_AT_artificial, 1);
8603 if (TREE_PROTECTED (decl))
8604 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8606 else if (TREE_PRIVATE (decl))
8607 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8611 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8612 Use modified_type_die instead.
8613 We keep this code here just in case these types of DIEs may be needed to
8614 represent certain things in other languages (e.g. Pascal) someday. */
8616 gen_pointer_type_die (type, context_die)
8618 register dw_die_ref context_die;
8620 register dw_die_ref ptr_die
8621 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8623 equate_type_number_to_die (type, ptr_die);
8624 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8625 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8628 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8629 Use modified_type_die instead.
8630 We keep this code here just in case these types of DIEs may be needed to
8631 represent certain things in other languages (e.g. Pascal) someday. */
8633 gen_reference_type_die (type, context_die)
8635 register dw_die_ref context_die;
8637 register dw_die_ref ref_die
8638 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8640 equate_type_number_to_die (type, ref_die);
8641 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8642 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8646 /* Generate a DIE for a pointer to a member type. */
8648 gen_ptr_to_mbr_type_die (type, context_die)
8650 register dw_die_ref context_die;
8652 register dw_die_ref ptr_die
8653 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8655 equate_type_number_to_die (type, ptr_die);
8656 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8657 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8658 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8661 /* Generate the DIE for the compilation unit. */
8664 gen_compile_unit_die (main_input_filename)
8665 register char *main_input_filename;
8668 char *wd = getpwd ();
8670 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8671 add_name_attribute (comp_unit_die, main_input_filename);
8674 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8676 sprintf (producer, "%s %s", language_string, version_string);
8678 #ifdef MIPS_DEBUGGING_INFO
8679 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8680 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8681 not appear in the producer string, the debugger reaches the conclusion
8682 that the object file is stripped and has no debugging information.
8683 To get the MIPS/SGI debugger to believe that there is debugging
8684 information in the object file, we add a -g to the producer string. */
8685 if (debug_info_level > DINFO_LEVEL_TERSE)
8686 strcat (producer, " -g");
8689 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8691 if (strcmp (language_string, "GNU C++") == 0)
8692 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8694 else if (strcmp (language_string, "GNU Ada") == 0)
8695 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8697 else if (strcmp (language_string, "GNU F77") == 0)
8698 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8700 else if (strcmp (language_string, "GNU Pascal") == 0)
8701 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8703 else if (flag_traditional)
8704 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8707 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8709 #if 0 /* unimplemented */
8710 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8711 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8715 /* Generate a DIE for a string type. */
8718 gen_string_type_die (type, context_die)
8720 register dw_die_ref context_die;
8722 register dw_die_ref type_die
8723 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8725 equate_type_number_to_die (type, type_die);
8727 /* Fudge the string length attribute for now. */
8729 /* TODO: add string length info.
8730 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8731 bound_representation (upper_bound, 0, 'u'); */
8734 /* Generate the DIE for a base class. */
8737 gen_inheritance_die (binfo, context_die)
8738 register tree binfo;
8739 register dw_die_ref context_die;
8741 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8743 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8744 add_data_member_location_attribute (die, binfo);
8746 if (TREE_VIA_VIRTUAL (binfo))
8747 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
8748 if (TREE_VIA_PUBLIC (binfo))
8749 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
8750 else if (TREE_VIA_PROTECTED (binfo))
8751 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
8754 /* Generate a DIE for a class member. */
8757 gen_member_die (type, context_die)
8759 register dw_die_ref context_die;
8761 register tree member;
8763 /* If this is not an incomplete type, output descriptions of each of its
8764 members. Note that as we output the DIEs necessary to represent the
8765 members of this record or union type, we will also be trying to output
8766 DIEs to represent the *types* of those members. However the `type'
8767 function (above) will specifically avoid generating type DIEs for member
8768 types *within* the list of member DIEs for this (containing) type execpt
8769 for those types (of members) which are explicitly marked as also being
8770 members of this (containing) type themselves. The g++ front- end can
8771 force any given type to be treated as a member of some other
8772 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8773 to point to the TREE node representing the appropriate (containing)
8776 /* First output info about the base classes. */
8777 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
8779 register tree bases = TYPE_BINFO_BASETYPES (type);
8780 register int n_bases = TREE_VEC_LENGTH (bases);
8783 for (i = 0; i < n_bases; i++)
8784 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
8787 /* Now output info about the data members and type members. */
8788 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
8789 gen_decl_die (member, context_die);
8791 /* Now output info about the function members (if any). */
8792 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
8793 gen_decl_die (member, context_die);
8796 /* Generate a DIE for a structure or union type. */
8799 gen_struct_or_union_type_die (type, context_die)
8801 register dw_die_ref context_die;
8803 register dw_die_ref type_die = lookup_type_die (type);
8804 register dw_die_ref scope_die = 0;
8805 register int nested = 0;
8807 if (type_die && ! TYPE_SIZE (type))
8810 if (TYPE_CONTEXT (type) != NULL_TREE
8811 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't')
8814 scope_die = scope_die_for (type, context_die);
8816 if (! type_die || (nested && scope_die == comp_unit_die))
8817 /* First occurrence of type or toplevel definition of nested class. */
8819 register dw_die_ref old_die = type_die;
8821 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
8822 ? DW_TAG_structure_type : DW_TAG_union_type,
8824 equate_type_number_to_die (type, type_die);
8825 add_name_attribute (type_die, type_tag (type));
8827 add_AT_die_ref (type_die, DW_AT_specification, old_die);
8830 remove_AT (type_die, DW_AT_declaration);
8832 /* If we're not in the right context to be defining this type, defer to
8833 avoid tricky recursion. */
8834 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
8836 add_AT_flag (type_die, DW_AT_declaration, 1);
8839 /* If this type has been completed, then give it a byte_size attribute and
8840 then give a list of members. */
8841 else if (TYPE_SIZE (type))
8843 /* Prevent infinite recursion in cases where the type of some member of
8844 this type is expressed in terms of this type itself. */
8845 TREE_ASM_WRITTEN (type) = 1;
8846 add_byte_size_attribute (type_die, type);
8847 if (TYPE_STUB_DECL (type) != NULL_TREE)
8848 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8850 /* If the first reference to this type was as the return type of an
8851 inline function, then it may not have a parent. Fix this now. */
8852 if (type_die->die_parent == NULL)
8853 add_child_die (scope_die, type_die);
8855 push_decl_scope (type);
8856 gen_member_die (type, type_die);
8859 /* GNU extension: Record what type our vtable lives in. */
8860 if (TYPE_VFIELD (type))
8862 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
8864 gen_type_die (vtype, context_die);
8865 add_AT_die_ref (type_die, DW_AT_containing_type,
8866 lookup_type_die (vtype));
8870 add_AT_flag (type_die, DW_AT_declaration, 1);
8873 /* Generate a DIE for a subroutine _type_. */
8876 gen_subroutine_type_die (type, context_die)
8878 register dw_die_ref context_die;
8880 register tree return_type = TREE_TYPE (type);
8881 register dw_die_ref subr_die
8882 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
8884 equate_type_number_to_die (type, subr_die);
8885 add_prototyped_attribute (subr_die, type);
8886 add_type_attribute (subr_die, return_type, 0, 0, context_die);
8887 gen_formal_types_die (type, subr_die);
8890 /* Generate a DIE for a type definition */
8893 gen_typedef_die (decl, context_die)
8895 register dw_die_ref context_die;
8897 register dw_die_ref type_die;
8898 register tree origin;
8900 if (TREE_ASM_WRITTEN (decl))
8902 TREE_ASM_WRITTEN (decl) = 1;
8904 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
8905 origin = decl_ultimate_origin (decl);
8907 add_abstract_origin_attribute (type_die, origin);
8911 add_name_and_src_coords_attributes (type_die, decl);
8912 if (DECL_ORIGINAL_TYPE (decl))
8914 type = DECL_ORIGINAL_TYPE (decl);
8915 equate_type_number_to_die (TREE_TYPE (decl), type_die);
8918 type = TREE_TYPE (decl);
8919 add_type_attribute (type_die, type, TREE_READONLY (decl),
8920 TREE_THIS_VOLATILE (decl), context_die);
8923 if (DECL_ABSTRACT (decl))
8924 equate_decl_number_to_die (decl, type_die);
8927 /* Generate a type description DIE. */
8930 gen_type_die (type, context_die)
8932 register dw_die_ref context_die;
8934 if (type == NULL_TREE || type == error_mark_node)
8937 /* We are going to output a DIE to represent the unqualified version of
8938 this type (i.e. without any const or volatile qualifiers) so get the
8939 main variant (i.e. the unqualified version) of this type now. */
8940 type = type_main_variant (type);
8942 if (TREE_ASM_WRITTEN (type))
8945 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8946 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
8948 TREE_ASM_WRITTEN (type) = 1;
8949 gen_decl_die (TYPE_NAME (type), context_die);
8953 switch (TREE_CODE (type))
8959 case REFERENCE_TYPE:
8960 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8961 ensures that the gen_type_die recursion will terminate even if the
8962 type is recursive. Recursive types are possible in Ada. */
8963 /* ??? We could perhaps do this for all types before the switch
8965 TREE_ASM_WRITTEN (type) = 1;
8967 /* For these types, all that is required is that we output a DIE (or a
8968 set of DIEs) to represent the "basis" type. */
8969 gen_type_die (TREE_TYPE (type), context_die);
8973 /* This code is used for C++ pointer-to-data-member types.
8974 Output a description of the relevant class type. */
8975 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
8977 /* Output a description of the type of the object pointed to. */
8978 gen_type_die (TREE_TYPE (type), context_die);
8980 /* Now output a DIE to represent this pointer-to-data-member type
8982 gen_ptr_to_mbr_type_die (type, context_die);
8986 gen_type_die (TYPE_DOMAIN (type), context_die);
8987 gen_set_type_die (type, context_die);
8991 gen_type_die (TREE_TYPE (type), context_die);
8992 abort (); /* No way to represent these in Dwarf yet! */
8996 /* Force out return type (in case it wasn't forced out already). */
8997 gen_type_die (TREE_TYPE (type), context_die);
8998 gen_subroutine_type_die (type, context_die);
9002 /* Force out return type (in case it wasn't forced out already). */
9003 gen_type_die (TREE_TYPE (type), context_die);
9004 gen_subroutine_type_die (type, context_die);
9008 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9010 gen_type_die (TREE_TYPE (type), context_die);
9011 gen_string_type_die (type, context_die);
9014 gen_array_type_die (type, context_die);
9020 case QUAL_UNION_TYPE:
9021 /* If this is a nested type whose containing class hasn't been
9022 written out yet, writing it out will cover this one, too. */
9023 if (TYPE_CONTEXT (type)
9024 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9025 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9027 gen_type_die (TYPE_CONTEXT (type), context_die);
9029 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9032 /* If that failed, attach ourselves to the stub. */
9033 push_decl_scope (TYPE_CONTEXT (type));
9034 context_die = lookup_type_die (TYPE_CONTEXT (type));
9037 if (TREE_CODE (type) == ENUMERAL_TYPE)
9038 gen_enumeration_type_die (type, context_die);
9040 gen_struct_or_union_type_die (type, context_die);
9042 if (TYPE_CONTEXT (type)
9043 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9044 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9047 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9048 it up if it is ever completed. gen_*_type_die will set it for us
9049 when appropriate. */
9058 /* No DIEs needed for fundamental types. */
9062 /* No Dwarf representation currently defined. */
9069 TREE_ASM_WRITTEN (type) = 1;
9072 /* Generate a DIE for a tagged type instantiation. */
9075 gen_tagged_type_instantiation_die (type, context_die)
9077 register dw_die_ref context_die;
9079 if (type == NULL_TREE || type == error_mark_node)
9082 /* We are going to output a DIE to represent the unqualified version of
9083 this type (i.e. without any const or volatile qualifiers) so make sure
9084 that we have the main variant (i.e. the unqualified version) of this
9086 if (type != type_main_variant (type)
9087 || !TREE_ASM_WRITTEN (type))
9090 switch (TREE_CODE (type))
9096 gen_inlined_enumeration_type_die (type, context_die);
9100 gen_inlined_structure_type_die (type, context_die);
9104 case QUAL_UNION_TYPE:
9105 gen_inlined_union_type_die (type, context_die);
9113 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9114 things which are local to the given block. */
9117 gen_block_die (stmt, context_die, depth)
9119 register dw_die_ref context_die;
9122 register int must_output_die = 0;
9123 register tree origin;
9125 register enum tree_code origin_code;
9127 /* Ignore blocks never really used to make RTL. */
9129 if (stmt == NULL_TREE || !TREE_USED (stmt))
9132 /* Determine the "ultimate origin" of this block. This block may be an
9133 inlined instance of an inlined instance of inline function, so we have
9134 to trace all of the way back through the origin chain to find out what
9135 sort of node actually served as the original seed for the creation of
9136 the current block. */
9137 origin = block_ultimate_origin (stmt);
9138 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9140 /* Determine if we need to output any Dwarf DIEs at all to represent this
9142 if (origin_code == FUNCTION_DECL)
9143 /* The outer scopes for inlinings *must* always be represented. We
9144 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9145 must_output_die = 1;
9148 /* In the case where the current block represents an inlining of the
9149 "body block" of an inline function, we must *NOT* output any DIE for
9150 this block because we have already output a DIE to represent the
9151 whole inlined function scope and the "body block" of any function
9152 doesn't really represent a different scope according to ANSI C
9153 rules. So we check here to make sure that this block does not
9154 represent a "body block inlining" before trying to set the
9155 `must_output_die' flag. */
9156 if (! is_body_block (origin ? origin : stmt))
9158 /* Determine if this block directly contains any "significant"
9159 local declarations which we will need to output DIEs for. */
9160 if (debug_info_level > DINFO_LEVEL_TERSE)
9161 /* We are not in terse mode so *any* local declaration counts
9162 as being a "significant" one. */
9163 must_output_die = (BLOCK_VARS (stmt) != NULL);
9165 /* We are in terse mode, so only local (nested) function
9166 definitions count as "significant" local declarations. */
9167 for (decl = BLOCK_VARS (stmt);
9168 decl != NULL; decl = TREE_CHAIN (decl))
9169 if (TREE_CODE (decl) == FUNCTION_DECL
9170 && DECL_INITIAL (decl))
9172 must_output_die = 1;
9178 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9179 DIE for any block which contains no significant local declarations at
9180 all. Rather, in such cases we just call `decls_for_scope' so that any
9181 needed Dwarf info for any sub-blocks will get properly generated. Note
9182 that in terse mode, our definition of what constitutes a "significant"
9183 local declaration gets restricted to include only inlined function
9184 instances and local (nested) function definitions. */
9185 if (must_output_die)
9187 if (origin_code == FUNCTION_DECL)
9188 gen_inlined_subroutine_die (stmt, context_die, depth);
9190 gen_lexical_block_die (stmt, context_die, depth);
9193 decls_for_scope (stmt, context_die, depth);
9196 /* Generate all of the decls declared within a given scope and (recursively)
9197 all of its sub-blocks. */
9200 decls_for_scope (stmt, context_die, depth)
9202 register dw_die_ref context_die;
9206 register tree subblocks;
9208 /* Ignore blocks never really used to make RTL. */
9209 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9212 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9213 next_block_number++;
9215 /* Output the DIEs to represent all of the data objects and typedefs
9216 declared directly within this block but not within any nested
9217 sub-blocks. Also, nested function and tag DIEs have been
9218 generated with a parent of NULL; fix that up now. */
9219 for (decl = BLOCK_VARS (stmt);
9220 decl != NULL; decl = TREE_CHAIN (decl))
9222 register dw_die_ref die;
9224 if (TREE_CODE (decl) == FUNCTION_DECL)
9225 die = lookup_decl_die (decl);
9226 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9227 die = lookup_type_die (TREE_TYPE (decl));
9231 if (die != NULL && die->die_parent == NULL)
9232 add_child_die (context_die, die);
9234 gen_decl_die (decl, context_die);
9237 /* Output the DIEs to represent all sub-blocks (and the items declared
9238 therein) of this block. */
9239 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9241 subblocks = BLOCK_CHAIN (subblocks))
9242 gen_block_die (subblocks, context_die, depth + 1);
9245 /* Is this a typedef we can avoid emitting? */
9248 is_redundant_typedef (decl)
9251 if (TYPE_DECL_IS_STUB (decl))
9254 if (DECL_ARTIFICIAL (decl)
9255 && DECL_CONTEXT (decl)
9256 && is_tagged_type (DECL_CONTEXT (decl))
9257 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9258 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9259 /* Also ignore the artificial member typedef for the class name. */
9265 /* Generate Dwarf debug information for a decl described by DECL. */
9268 gen_decl_die (decl, context_die)
9270 register dw_die_ref context_die;
9272 register tree origin;
9274 /* Make a note of the decl node we are going to be working on. We may need
9275 to give the user the source coordinates of where it appeared in case we
9276 notice (later on) that something about it looks screwy. */
9277 dwarf_last_decl = decl;
9279 if (TREE_CODE (decl) == ERROR_MARK)
9282 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9283 ignore a function definition, since that would screw up our count of
9284 blocks, and that in turn will completely screw up the labels we will
9285 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9286 subsequent blocks). */
9287 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9290 switch (TREE_CODE (decl))
9293 /* The individual enumerators of an enum type get output when we output
9294 the Dwarf representation of the relevant enum type itself. */
9298 /* Don't output any DIEs to represent mere function declarations,
9299 unless they are class members or explicit block externs. */
9300 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9301 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9304 if (debug_info_level > DINFO_LEVEL_TERSE)
9306 /* Before we describe the FUNCTION_DECL itself, make sure that we
9307 have described its return type. */
9308 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9310 /* And its containing type. */
9311 origin = decl_class_context (decl);
9312 if (origin != NULL_TREE)
9313 gen_type_die (origin, context_die);
9315 /* And its virtual context. */
9316 if (DECL_VINDEX (decl) != NULL_TREE)
9317 gen_type_die (DECL_CONTEXT (decl), context_die);
9320 /* Now output a DIE to represent the function itself. */
9321 gen_subprogram_die (decl, context_die);
9325 /* If we are in terse mode, don't generate any DIEs to represent any
9327 if (debug_info_level <= DINFO_LEVEL_TERSE)
9330 /* In the special case of a TYPE_DECL node representing the
9331 declaration of some type tag, if the given TYPE_DECL is marked as
9332 having been instantiated from some other (original) TYPE_DECL node
9333 (e.g. one which was generated within the original definition of an
9334 inline function) we have to generate a special (abbreviated)
9335 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9337 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9339 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9343 if (is_redundant_typedef (decl))
9344 gen_type_die (TREE_TYPE (decl), context_die);
9346 /* Output a DIE to represent the typedef itself. */
9347 gen_typedef_die (decl, context_die);
9351 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9352 gen_label_die (decl, context_die);
9356 /* If we are in terse mode, don't generate any DIEs to represent any
9357 variable declarations or definitions. */
9358 if (debug_info_level <= DINFO_LEVEL_TERSE)
9361 /* Output any DIEs that are needed to specify the type of this data
9363 gen_type_die (TREE_TYPE (decl), context_die);
9365 /* And its containing type. */
9366 origin = decl_class_context (decl);
9367 if (origin != NULL_TREE)
9368 gen_type_die (origin, context_die);
9370 /* Now output the DIE to represent the data object itself. This gets
9371 complicated because of the possibility that the VAR_DECL really
9372 represents an inlined instance of a formal parameter for an inline
9374 origin = decl_ultimate_origin (decl);
9375 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9376 gen_formal_parameter_die (decl, context_die);
9378 gen_variable_die (decl, context_die);
9382 /* Ignore the nameless fields that are used to skip bits, but
9383 handle C++ anonymous unions. */
9384 if (DECL_NAME (decl) != NULL_TREE
9385 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9387 gen_type_die (member_declared_type (decl), context_die);
9388 gen_field_die (decl, context_die);
9393 gen_type_die (TREE_TYPE (decl), context_die);
9394 gen_formal_parameter_die (decl, context_die);
9402 /* Write the debugging output for DECL. */
9405 dwarf2out_decl (decl)
9408 register dw_die_ref context_die = comp_unit_die;
9410 if (TREE_CODE (decl) == ERROR_MARK)
9413 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9414 hope that the node in question doesn't represent a function definition.
9415 If it does, then totally ignoring it is bound to screw up our count of
9416 blocks, and that in turn will completely screw up the labels we will
9417 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9418 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9419 own sequence numbers with them!) */
9420 if (DECL_IGNORED_P (decl))
9422 if (TREE_CODE (decl) == FUNCTION_DECL
9423 && DECL_INITIAL (decl) != NULL)
9429 switch (TREE_CODE (decl))
9432 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9433 builtin function. Explicit programmer-supplied declarations of
9434 these same functions should NOT be ignored however. */
9435 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9438 /* What we would really like to do here is to filter out all mere
9439 file-scope declarations of file-scope functions which are never
9440 referenced later within this translation unit (and keep all of ones
9441 that *are* referenced later on) but we aren't clairvoyant, so we have
9442 no idea which functions will be referenced in the future (i.e. later
9443 on within the current translation unit). So here we just ignore all
9444 file-scope function declarations which are not also definitions. If
9445 and when the debugger needs to know something about these functions,
9446 it wil have to hunt around and find the DWARF information associated
9447 with the definition of the function. Note that we can't just check
9448 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9449 definitions and which ones represent mere declarations. We have to
9450 check `DECL_INITIAL' instead. That's because the C front-end
9451 supports some weird semantics for "extern inline" function
9452 definitions. These can get inlined within the current translation
9453 unit (an thus, we need to generate DWARF info for their abstract
9454 instances so that the DWARF info for the concrete inlined instances
9455 can have something to refer to) but the compiler never generates any
9456 out-of-lines instances of such things (despite the fact that they
9457 *are* definitions). The important point is that the C front-end
9458 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9459 to generate DWARF for them anyway. Note that the C++ front-end also
9460 plays some similar games for inline function definitions appearing
9461 within include files which also contain
9462 `#pragma interface' pragmas. */
9463 if (DECL_INITIAL (decl) == NULL_TREE)
9466 /* If we're a nested function, initially use a parent of NULL; if we're
9467 a plain function, this will be fixed up in decls_for_scope. If
9468 we're a method, it will be ignored, since we already have a DIE. */
9469 if (decl_function_context (decl))
9475 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9476 declaration and if the declaration was never even referenced from
9477 within this entire compilation unit. We suppress these DIEs in
9478 order to save space in the .debug section (by eliminating entries
9479 which are probably useless). Note that we must not suppress
9480 block-local extern declarations (whether used or not) because that
9481 would screw-up the debugger's name lookup mechanism and cause it to
9482 miss things which really ought to be in scope at a given point. */
9483 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9486 /* If we are in terse mode, don't generate any DIEs to represent any
9487 variable declarations or definitions. */
9488 if (debug_info_level <= DINFO_LEVEL_TERSE)
9493 /* Don't bother trying to generate any DIEs to represent any of the
9494 normal built-in types for the language we are compiling. */
9495 if (DECL_SOURCE_LINE (decl) == 0)
9497 /* OK, we need to generate one for `bool' so GDB knows what type
9498 comparisons have. */
9499 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9500 == DW_LANG_C_plus_plus)
9501 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9502 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9507 /* If we are in terse mode, don't generate any DIEs for types. */
9508 if (debug_info_level <= DINFO_LEVEL_TERSE)
9511 /* If we're a function-scope tag, initially use a parent of NULL;
9512 this will be fixed up in decls_for_scope. */
9513 if (decl_function_context (decl))
9522 gen_decl_die (decl, context_die);
9523 output_pending_types_for_scope (comp_unit_die);
9526 /* Output a marker (i.e. a label) for the beginning of the generated code for
9530 dwarf2out_begin_block (blocknum)
9531 register unsigned blocknum;
9533 function_section (current_function_decl);
9534 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9537 /* Output a marker (i.e. a label) for the end of the generated code for a
9541 dwarf2out_end_block (blocknum)
9542 register unsigned blocknum;
9544 function_section (current_function_decl);
9545 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9548 /* Output a marker (i.e. a label) at a point in the assembly code which
9549 corresponds to a given source level label. */
9552 dwarf2out_label (insn)
9555 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9557 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9559 function_section (current_function_decl);
9560 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9561 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9562 (unsigned) INSN_UID (insn));
9566 /* Lookup a filename (in the list of filenames that we know about here in
9567 dwarf2out.c) and return its "index". The index of each (known) filename is
9568 just a unique number which is associated with only that one filename.
9569 We need such numbers for the sake of generating labels
9570 (in the .debug_sfnames section) and references to those
9571 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9572 If the filename given as an argument is not found in our current list,
9573 add it to the list and assign it the next available unique index number.
9574 In order to speed up searches, we remember the index of the filename
9575 was looked up last. This handles the majority of all searches. */
9578 lookup_filename (file_name)
9581 static unsigned last_file_lookup_index = 0;
9582 register unsigned i;
9584 /* Check to see if the file name that was searched on the previous call
9585 matches this file name. If so, return the index. */
9586 if (last_file_lookup_index != 0)
9587 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9588 return last_file_lookup_index;
9590 /* Didn't match the previous lookup, search the table */
9591 for (i = 1; i < file_table_in_use; ++i)
9592 if (strcmp (file_name, file_table[i]) == 0)
9594 last_file_lookup_index = i;
9598 /* Prepare to add a new table entry by making sure there is enough space in
9599 the table to do so. If not, expand the current table. */
9600 if (file_table_in_use == file_table_allocated)
9602 file_table_allocated += FILE_TABLE_INCREMENT;
9604 = (char **) xrealloc (file_table,
9605 file_table_allocated * sizeof (char *));
9608 /* Add the new entry to the end of the filename table. */
9609 file_table[file_table_in_use] = xstrdup (file_name);
9610 last_file_lookup_index = file_table_in_use++;
9612 return last_file_lookup_index;
9615 /* Output a label to mark the beginning of a source code line entry
9616 and record information relating to this source line, in
9617 'line_info_table' for later output of the .debug_line section. */
9620 dwarf2out_line (filename, line)
9621 register char *filename;
9622 register unsigned line;
9624 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9626 function_section (current_function_decl);
9628 if (DECL_SECTION_NAME (current_function_decl))
9630 register dw_separate_line_info_ref line_info;
9631 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9632 separate_line_info_table_in_use);
9633 fputc ('\n', asm_out_file);
9635 /* expand the line info table if necessary */
9636 if (separate_line_info_table_in_use
9637 == separate_line_info_table_allocated)
9639 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9640 separate_line_info_table
9641 = (dw_separate_line_info_ref)
9642 xrealloc (separate_line_info_table,
9643 separate_line_info_table_allocated
9644 * sizeof (dw_separate_line_info_entry));
9647 /* Add the new entry at the end of the line_info_table. */
9649 = &separate_line_info_table[separate_line_info_table_in_use++];
9650 line_info->dw_file_num = lookup_filename (filename);
9651 line_info->dw_line_num = line;
9652 line_info->function = current_funcdef_number;
9656 register dw_line_info_ref line_info;
9658 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9659 line_info_table_in_use);
9660 fputc ('\n', asm_out_file);
9662 /* Expand the line info table if necessary. */
9663 if (line_info_table_in_use == line_info_table_allocated)
9665 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9667 = (dw_line_info_ref)
9668 xrealloc (line_info_table,
9669 (line_info_table_allocated
9670 * sizeof (dw_line_info_entry)));
9673 /* Add the new entry at the end of the line_info_table. */
9674 line_info = &line_info_table[line_info_table_in_use++];
9675 line_info->dw_file_num = lookup_filename (filename);
9676 line_info->dw_line_num = line;
9681 /* Record the beginning of a new source file, for later output
9682 of the .debug_macinfo section. At present, unimplemented. */
9685 dwarf2out_start_source_file (filename)
9686 register char *filename ATTRIBUTE_UNUSED;
9690 /* Record the end of a source file, for later output
9691 of the .debug_macinfo section. At present, unimplemented. */
9694 dwarf2out_end_source_file ()
9698 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9699 the tail part of the directive line, i.e. the part which is past the
9700 initial whitespace, #, whitespace, directive-name, whitespace part. */
9703 dwarf2out_define (lineno, buffer)
9704 register unsigned lineno;
9705 register char *buffer;
9707 static int initialized = 0;
9710 dwarf2out_start_source_file (primary_filename);
9715 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9716 the tail part of the directive line, i.e. the part which is past the
9717 initial whitespace, #, whitespace, directive-name, whitespace part. */
9720 dwarf2out_undef (lineno, buffer)
9721 register unsigned lineno ATTRIBUTE_UNUSED;
9722 register char *buffer ATTRIBUTE_UNUSED;
9726 /* Set up for Dwarf output at the start of compilation. */
9729 dwarf2out_init (asm_out_file, main_input_filename)
9730 register FILE *asm_out_file;
9731 register char *main_input_filename;
9733 /* Remember the name of the primary input file. */
9734 primary_filename = main_input_filename;
9736 /* Allocate the initial hunk of the file_table. */
9737 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
9738 bzero ((char *) file_table, FILE_TABLE_INCREMENT * sizeof (char *));
9739 file_table_allocated = FILE_TABLE_INCREMENT;
9741 /* Skip the first entry - file numbers begin at 1. */
9742 file_table_in_use = 1;
9744 /* Allocate the initial hunk of the decl_die_table. */
9746 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9747 bzero ((char *) decl_die_table,
9748 DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9749 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
9750 decl_die_table_in_use = 0;
9752 /* Allocate the initial hunk of the decl_scope_table. */
9754 = (decl_scope_node *) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9755 * sizeof (decl_scope_node));
9756 bzero ((char *) decl_scope_table,
9757 DECL_SCOPE_TABLE_INCREMENT * sizeof (decl_scope_node));
9758 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
9759 decl_scope_depth = 0;
9761 /* Allocate the initial hunk of the abbrev_die_table. */
9763 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9764 * sizeof (dw_die_ref));
9765 bzero ((char *) abbrev_die_table,
9766 ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9767 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
9768 /* Zero-th entry is allocated, but unused */
9769 abbrev_die_table_in_use = 1;
9771 /* Allocate the initial hunk of the line_info_table. */
9773 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
9774 * sizeof (dw_line_info_entry));
9775 bzero ((char *) line_info_table,
9776 LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry));
9777 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
9778 /* Zero-th entry is allocated, but unused */
9779 line_info_table_in_use = 1;
9781 /* Generate the initial DIE for the .debug section. Note that the (string)
9782 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9783 will (typically) be a relative pathname and that this pathname should be
9784 taken as being relative to the directory from which the compiler was
9785 invoked when the given (base) source file was compiled. */
9786 gen_compile_unit_die (main_input_filename);
9788 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
9791 /* Output stuff that dwarf requires at the end of every file,
9792 and generate the DWARF-2 debugging info. */
9797 limbo_die_node *node, *next_node;
9801 /* Traverse the limbo die list, and add parent/child links. The only
9802 dies without parents that should be here are concrete instances of
9803 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9804 For concrete instances, we can get the parent die from the abstract
9806 for (node = limbo_die_list; node; node = next_node)
9808 next_node = node->next;
9811 if (die->die_parent == NULL)
9813 a = get_AT (die, DW_AT_abstract_origin);
9815 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
9816 else if (die == comp_unit_die)
9824 /* Traverse the DIE tree and add sibling attributes to those DIE's
9825 that have children. */
9826 add_sibling_attributes (comp_unit_die);
9828 /* Output a terminator label for the .text section. */
9829 fputc ('\n', asm_out_file);
9830 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
9831 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
9834 /* Output a terminator label for the .data section. */
9835 fputc ('\n', asm_out_file);
9836 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
9837 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
9839 /* Output a terminator label for the .bss section. */
9840 fputc ('\n', asm_out_file);
9841 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
9842 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
9845 /* Output the source line correspondence table. */
9846 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
9848 fputc ('\n', asm_out_file);
9849 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
9850 output_line_info ();
9852 /* We can only use the low/high_pc attributes if all of the code
9854 if (separate_line_info_table_in_use == 0)
9856 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc,
9857 stripattributes (TEXT_SECTION));
9858 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
9861 add_AT_section_offset (comp_unit_die, DW_AT_stmt_list, DEBUG_LINE_SECTION);
9864 /* Output the abbreviation table. */
9865 fputc ('\n', asm_out_file);
9866 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
9867 build_abbrev_table (comp_unit_die);
9868 output_abbrev_section ();
9870 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9871 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
9872 calc_die_sizes (comp_unit_die);
9874 /* Output debugging information. */
9875 fputc ('\n', asm_out_file);
9876 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
9877 output_compilation_unit_header ();
9878 output_die (comp_unit_die);
9880 if (pubname_table_in_use)
9882 /* Output public names table. */
9883 fputc ('\n', asm_out_file);
9884 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
9888 if (fde_table_in_use)
9890 /* Output the address range information. */
9891 fputc ('\n', asm_out_file);
9892 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
9896 #endif /* DWARF2_DEBUGGING_INFO */