1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 93, 95, 96, 97, 1998 Free Software Foundation, Inc.
3 Contributed by Gary Funck (gary@intrepid.com).
4 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
5 Extensively modified by Jason Merrill (jason@cygnus.com).
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* The first part of this file deals with the DWARF 2 frame unwind
24 information, which is also used by the GCC efficient exception handling
25 mechanism. The second part, controlled only by an #ifdef
26 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
35 #include "hard-reg-set.h"
37 #include "insn-config.h"
43 #include "dwarf2out.h"
46 /* We cannot use <assert.h> in GCC source, since that would include
47 GCC's assert.h, which may not be compatible with the host compiler. */
52 # define assert(e) do { if (! (e)) abort (); } while (0)
55 /* Decide whether we want to emit frame unwind information for the current
61 return (write_symbols == DWARF2_DEBUG
62 #ifdef DWARF2_UNWIND_INFO
63 || (flag_exceptions && ! exceptions_via_longjmp)
68 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
74 /* How to start an assembler comment. */
75 #ifndef ASM_COMMENT_START
76 #define ASM_COMMENT_START ";#"
79 typedef struct dw_cfi_struct *dw_cfi_ref;
80 typedef struct dw_fde_struct *dw_fde_ref;
81 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
83 /* Call frames are described using a sequence of Call Frame
84 Information instructions. The register number, offset
85 and address fields are provided as possible operands;
86 their use is selected by the opcode field. */
88 typedef union dw_cfi_oprnd_struct
90 unsigned long dw_cfi_reg_num;
91 long int dw_cfi_offset;
96 typedef struct dw_cfi_struct
98 dw_cfi_ref dw_cfi_next;
99 enum dwarf_call_frame_info dw_cfi_opc;
100 dw_cfi_oprnd dw_cfi_oprnd1;
101 dw_cfi_oprnd dw_cfi_oprnd2;
105 /* All call frame descriptions (FDE's) in the GCC generated DWARF
106 refer to a single Common Information Entry (CIE), defined at
107 the beginning of the .debug_frame section. This used of a single
108 CIE obviates the need to keep track of multiple CIE's
109 in the DWARF generation routines below. */
111 typedef struct dw_fde_struct
114 char *dw_fde_current_label;
116 dw_cfi_ref dw_fde_cfi;
120 /* Maximum size (in bytes) of an artificially generated label. */
121 #define MAX_ARTIFICIAL_LABEL_BYTES 30
123 /* Make sure we know the sizes of the various types dwarf can describe. These
124 are only defaults. If the sizes are different for your target, you should
125 override these values by defining the appropriate symbols in your tm.h
128 #ifndef CHAR_TYPE_SIZE
129 #define CHAR_TYPE_SIZE BITS_PER_UNIT
132 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
135 /* The size in bytes of a DWARF field indicating an offset or length
136 relative to a debug info section, specified to be 4 bytes in the DWARF-2
137 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
139 #ifndef DWARF_OFFSET_SIZE
140 #define DWARF_OFFSET_SIZE 4
143 #define DWARF_VERSION 2
145 /* Round SIZE up to the nearest BOUNDARY. */
146 #define DWARF_ROUND(SIZE,BOUNDARY) \
147 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
149 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
150 #ifdef STACK_GROWS_DOWNWARD
151 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
153 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
156 /* A pointer to the base of a table that contains frame description
157 information for each routine. */
158 static dw_fde_ref fde_table;
160 /* Number of elements currently allocated for fde_table. */
161 static unsigned fde_table_allocated;
163 /* Number of elements in fde_table currently in use. */
164 static unsigned fde_table_in_use;
166 /* Size (in elements) of increments by which we may expand the
168 #define FDE_TABLE_INCREMENT 256
170 /* A list of call frame insns for the CIE. */
171 static dw_cfi_ref cie_cfi_head;
173 /* The number of the current function definition for which debugging
174 information is being generated. These numbers range from 1 up to the
175 maximum number of function definitions contained within the current
176 compilation unit. These numbers are used to create unique label id's
177 unique to each function definition. */
178 static unsigned current_funcdef_number = 0;
180 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
181 attribute that accelerates the lookup of the FDE associated
182 with the subprogram. This variable holds the table index of the FDE
183 associated with the current function (body) definition. */
184 static unsigned current_funcdef_fde;
186 /* Forward declarations for functions defined in this file. */
188 static char *stripattributes PROTO((char *));
189 static char *dwarf_cfi_name PROTO((unsigned));
190 static dw_cfi_ref new_cfi PROTO((void));
191 static void add_cfi PROTO((dw_cfi_ref *, dw_cfi_ref));
192 static unsigned long size_of_uleb128 PROTO((unsigned long));
193 static unsigned long size_of_sleb128 PROTO((long));
194 static void output_uleb128 PROTO((unsigned long));
195 static void output_sleb128 PROTO((long));
196 static void add_fde_cfi PROTO((char *, dw_cfi_ref));
197 static void lookup_cfa_1 PROTO((dw_cfi_ref, unsigned long *,
199 static void lookup_cfa PROTO((unsigned long *, long *));
200 static void reg_save PROTO((char *, unsigned, unsigned,
202 static void initial_return_save PROTO((rtx));
203 static void output_cfi PROTO((dw_cfi_ref, dw_fde_ref));
204 static void output_call_frame_info PROTO((int));
205 static unsigned reg_number PROTO((rtx));
206 static void dwarf2out_stack_adjust PROTO((rtx));
208 /* Definitions of defaults for assembler-dependent names of various
209 pseudo-ops and section names.
210 Theses may be overridden in the tm.h file (if necessary) for a particular
213 #ifdef OBJECT_FORMAT_ELF
214 #ifndef UNALIGNED_SHORT_ASM_OP
215 #define UNALIGNED_SHORT_ASM_OP ".2byte"
217 #ifndef UNALIGNED_INT_ASM_OP
218 #define UNALIGNED_INT_ASM_OP ".4byte"
220 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
221 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
223 #endif /* OBJECT_FORMAT_ELF */
226 #define ASM_BYTE_OP ".byte"
229 /* Data and reference forms for relocatable data. */
230 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
231 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
233 /* Pseudo-op for defining a new section. */
234 #ifndef SECTION_ASM_OP
235 #define SECTION_ASM_OP ".section"
238 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
239 print the SECTION_ASM_OP and the section name. The default here works for
240 almost all svr4 assemblers, except for the sparc, where the section name
241 must be enclosed in double quotes. (See sparcv4.h). */
242 #ifndef SECTION_FORMAT
243 #ifdef PUSHSECTION_FORMAT
244 #define SECTION_FORMAT PUSHSECTION_FORMAT
246 #define SECTION_FORMAT "\t%s\t%s\n"
250 #ifndef FRAME_SECTION
251 #define FRAME_SECTION ".debug_frame"
254 #ifndef FUNC_BEGIN_LABEL
255 #define FUNC_BEGIN_LABEL "LFB"
257 #ifndef FUNC_END_LABEL
258 #define FUNC_END_LABEL "LFE"
260 #define CIE_AFTER_SIZE_LABEL "LSCIE"
261 #define CIE_END_LABEL "LECIE"
262 #define CIE_LENGTH_LABEL "LLCIE"
263 #define FDE_AFTER_SIZE_LABEL "LSFDE"
264 #define FDE_END_LABEL "LEFDE"
265 #define FDE_LENGTH_LABEL "LLFDE"
267 /* Definitions of defaults for various types of primitive assembly language
268 output operations. These may be overridden from within the tm.h file,
269 but typically, that is unnecessary. */
271 #ifndef ASM_OUTPUT_SECTION
272 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
273 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
276 #ifndef ASM_OUTPUT_DWARF_DATA1
277 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
278 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, VALUE)
281 #ifndef ASM_OUTPUT_DWARF_DELTA1
282 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
283 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
284 assemble_name (FILE, LABEL1); \
285 fprintf (FILE, "-"); \
286 assemble_name (FILE, LABEL2); \
290 #ifdef UNALIGNED_INT_ASM_OP
292 #ifndef UNALIGNED_OFFSET_ASM_OP
293 #define UNALIGNED_OFFSET_ASM_OP \
294 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
297 #ifndef UNALIGNED_WORD_ASM_OP
298 #define UNALIGNED_WORD_ASM_OP \
299 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
302 #ifndef ASM_OUTPUT_DWARF_DELTA2
303 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
304 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
305 assemble_name (FILE, LABEL1); \
306 fprintf (FILE, "-"); \
307 assemble_name (FILE, LABEL2); \
311 #ifndef ASM_OUTPUT_DWARF_DELTA4
312 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
313 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
314 assemble_name (FILE, LABEL1); \
315 fprintf (FILE, "-"); \
316 assemble_name (FILE, LABEL2); \
320 #ifndef ASM_OUTPUT_DWARF_DELTA
321 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
322 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
323 assemble_name (FILE, LABEL1); \
324 fprintf (FILE, "-"); \
325 assemble_name (FILE, LABEL2); \
329 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
330 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
331 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
332 assemble_name (FILE, LABEL1); \
333 fprintf (FILE, "-"); \
334 assemble_name (FILE, LABEL2); \
338 #ifndef ASM_OUTPUT_DWARF_ADDR
339 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
340 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
341 assemble_name (FILE, LABEL); \
345 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
346 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
347 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
350 #ifndef ASM_OUTPUT_DWARF_OFFSET4
351 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
352 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
353 assemble_name (FILE, LABEL); \
357 #ifndef ASM_OUTPUT_DWARF_OFFSET
358 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
359 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
360 assemble_name (FILE, LABEL); \
364 #ifndef ASM_OUTPUT_DWARF_DATA2
365 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
366 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) VALUE)
369 #ifndef ASM_OUTPUT_DWARF_DATA4
370 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
371 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) VALUE)
374 #ifndef ASM_OUTPUT_DWARF_DATA
375 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
376 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
377 (unsigned long) VALUE)
380 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
381 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
382 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
383 (unsigned long) VALUE)
386 #ifndef ASM_OUTPUT_DWARF_DATA8
387 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
389 if (WORDS_BIG_ENDIAN) \
391 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
392 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
396 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
397 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
402 #else /* UNALIGNED_INT_ASM_OP */
404 /* We don't have unaligned support, let's hope the normal output works for
407 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
408 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
410 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
411 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
413 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
414 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
416 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
417 assemble_integer (gen_rtx_MINUS (HImode, \
418 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
419 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
422 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
423 assemble_integer (gen_rtx_MINUS (SImode, \
424 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
425 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
428 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
429 assemble_integer (gen_rtx_MINUS (Pmode, \
430 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
431 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
434 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
435 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
437 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
438 assemble_integer (GEN_INT (VALUE), 4, 1)
440 #endif /* UNALIGNED_INT_ASM_OP */
443 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
444 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
446 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
447 assemble_name (FILE, SY); \
449 assemble_name (FILE, HI); \
451 assemble_name (FILE, LO); \
454 #endif /* SET_ASM_OP */
456 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
457 newline is produced. When flag_debug_asm is asserted, we add commentary
458 at the end of the line, so we must avoid output of a newline here. */
459 #ifndef ASM_OUTPUT_DWARF_STRING
460 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
462 register int slen = strlen(P); \
463 register char *p = (P); \
465 fprintf (FILE, "\t.ascii \""); \
466 for (i = 0; i < slen; i++) \
468 register int c = p[i]; \
469 if (c == '\"' || c == '\\') \
471 if (c >= ' ' && c < 0177) \
475 fprintf (FILE, "\\%o", c); \
478 fprintf (FILE, "\\0\""); \
483 /* The DWARF 2 CFA column which tracks the return address. Normally this
484 is the column for PC, or the first column after all of the hard
486 #ifndef DWARF_FRAME_RETURN_COLUMN
488 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
490 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
494 /* The mapping from gcc register number to DWARF 2 CFA column number. By
495 default, we just provide columns for all registers. */
496 #ifndef DWARF_FRAME_REGNUM
497 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
500 /* Hook used by __throw. */
503 expand_builtin_dwarf_fp_regnum ()
505 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
508 /* The offset from the incoming value of %sp to the top of the stack frame
509 for the current function. */
510 #ifndef INCOMING_FRAME_SP_OFFSET
511 #define INCOMING_FRAME_SP_OFFSET 0
514 /* Return a pointer to a copy of the section string name S with all
515 attributes stripped off. */
521 char *stripped = xstrdup (s);
524 while (*p && *p != ',')
531 /* Return the register number described by a given RTL node. */
537 register unsigned regno = REGNO (rtl);
539 if (regno >= FIRST_PSEUDO_REGISTER)
541 warning ("internal regno botch: regno = %d\n", regno);
545 regno = DBX_REGISTER_NUMBER (regno);
549 struct reg_size_range
556 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
557 We do this in kind of a roundabout way, by building up a list of
558 register size ranges and seeing where our register falls in one of those
559 ranges. We need to do it this way because REG_TREE is not a constant,
560 and the target macros were not designed to make this task easy. */
563 expand_builtin_dwarf_reg_size (reg_tree, target)
567 enum machine_mode mode;
569 struct reg_size_range ranges[5];
576 for (; i < FIRST_PSEUDO_REGISTER; ++i)
578 /* The return address is out of order on the MIPS, and we don't use
579 copy_reg for it anyway, so we don't care here how large it is. */
580 if (DWARF_FRAME_REGNUM (i) == DWARF_FRAME_RETURN_COLUMN)
583 mode = reg_raw_mode[i];
585 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
586 to use the same size as word_mode, since that reduces the number
587 of ranges we need. It should not matter, since the result should
588 never be used for a condition code register anyways. */
589 if (GET_MODE_CLASS (mode) == MODE_CC)
592 size = GET_MODE_SIZE (mode);
594 /* If this register is not valid in the specified mode and
595 we have a previous size, use that for the size of this
596 register to avoid making junk tiny ranges. */
597 if (! HARD_REGNO_MODE_OK (i, mode) && last_size != -1)
600 if (size != last_size)
602 ranges[n_ranges].beg = i;
603 ranges[n_ranges].size = last_size = size;
608 ranges[n_ranges-1].end = i;
611 /* The usual case: fp regs surrounded by general regs. */
612 if (n_ranges == 3 && ranges[0].size == ranges[2].size)
614 if ((DWARF_FRAME_REGNUM (ranges[1].end)
615 - DWARF_FRAME_REGNUM (ranges[1].beg))
616 != ranges[1].end - ranges[1].beg)
618 t = fold (build (GE_EXPR, integer_type_node, reg_tree,
619 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].beg), 0)));
620 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
621 build_int_2 (DWARF_FRAME_REGNUM (ranges[1].end), 0)));
622 t = fold (build (TRUTH_ANDIF_EXPR, integer_type_node, t, t2));
623 t = fold (build (COND_EXPR, integer_type_node, t,
624 build_int_2 (ranges[1].size, 0),
625 build_int_2 (ranges[0].size, 0)));
630 t = build_int_2 (ranges[n_ranges].size, 0);
631 size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
634 if ((DWARF_FRAME_REGNUM (ranges[n_ranges].end)
635 - DWARF_FRAME_REGNUM (ranges[n_ranges].beg))
636 != ranges[n_ranges].end - ranges[n_ranges].beg)
638 if (DWARF_FRAME_REGNUM (ranges[n_ranges].beg) >= size)
640 size = DWARF_FRAME_REGNUM (ranges[n_ranges].beg);
641 t2 = fold (build (LE_EXPR, integer_type_node, reg_tree,
642 build_int_2 (DWARF_FRAME_REGNUM
643 (ranges[n_ranges].end), 0)));
644 t = fold (build (COND_EXPR, integer_type_node, t2,
645 build_int_2 (ranges[n_ranges].size, 0), t));
648 return expand_expr (t, target, Pmode, 0);
651 /* Convert a DWARF call frame info. operation to its string name */
654 dwarf_cfi_name (cfi_opc)
655 register unsigned cfi_opc;
659 case DW_CFA_advance_loc:
660 return "DW_CFA_advance_loc";
662 return "DW_CFA_offset";
664 return "DW_CFA_restore";
668 return "DW_CFA_set_loc";
669 case DW_CFA_advance_loc1:
670 return "DW_CFA_advance_loc1";
671 case DW_CFA_advance_loc2:
672 return "DW_CFA_advance_loc2";
673 case DW_CFA_advance_loc4:
674 return "DW_CFA_advance_loc4";
675 case DW_CFA_offset_extended:
676 return "DW_CFA_offset_extended";
677 case DW_CFA_restore_extended:
678 return "DW_CFA_restore_extended";
679 case DW_CFA_undefined:
680 return "DW_CFA_undefined";
681 case DW_CFA_same_value:
682 return "DW_CFA_same_value";
683 case DW_CFA_register:
684 return "DW_CFA_register";
685 case DW_CFA_remember_state:
686 return "DW_CFA_remember_state";
687 case DW_CFA_restore_state:
688 return "DW_CFA_restore_state";
690 return "DW_CFA_def_cfa";
691 case DW_CFA_def_cfa_register:
692 return "DW_CFA_def_cfa_register";
693 case DW_CFA_def_cfa_offset:
694 return "DW_CFA_def_cfa_offset";
696 /* SGI/MIPS specific */
697 case DW_CFA_MIPS_advance_loc8:
698 return "DW_CFA_MIPS_advance_loc8";
701 case DW_CFA_GNU_window_save:
702 return "DW_CFA_GNU_window_save";
703 case DW_CFA_GNU_args_size:
704 return "DW_CFA_GNU_args_size";
707 return "DW_CFA_<unknown>";
711 /* Return a pointer to a newly allocated Call Frame Instruction. */
713 static inline dw_cfi_ref
716 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
718 cfi->dw_cfi_next = NULL;
719 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
720 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
725 /* Add a Call Frame Instruction to list of instructions. */
728 add_cfi (list_head, cfi)
729 register dw_cfi_ref *list_head;
730 register dw_cfi_ref cfi;
732 register dw_cfi_ref *p;
734 /* Find the end of the chain. */
735 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
741 /* Generate a new label for the CFI info to refer to. */
744 dwarf2out_cfi_label ()
746 static char label[20];
747 static unsigned long label_num = 0;
749 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
750 ASM_OUTPUT_LABEL (asm_out_file, label);
755 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
756 or to the CIE if LABEL is NULL. */
759 add_fde_cfi (label, cfi)
760 register char *label;
761 register dw_cfi_ref cfi;
765 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
768 label = dwarf2out_cfi_label ();
770 if (fde->dw_fde_current_label == NULL
771 || strcmp (label, fde->dw_fde_current_label) != 0)
773 register dw_cfi_ref xcfi;
775 fde->dw_fde_current_label = label = xstrdup (label);
777 /* Set the location counter to the new label. */
779 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
780 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
781 add_cfi (&fde->dw_fde_cfi, xcfi);
784 add_cfi (&fde->dw_fde_cfi, cfi);
788 add_cfi (&cie_cfi_head, cfi);
791 /* Subroutine of lookup_cfa. */
794 lookup_cfa_1 (cfi, regp, offsetp)
795 register dw_cfi_ref cfi;
796 register unsigned long *regp;
797 register long *offsetp;
799 switch (cfi->dw_cfi_opc)
801 case DW_CFA_def_cfa_offset:
802 *offsetp = cfi->dw_cfi_oprnd1.dw_cfi_offset;
804 case DW_CFA_def_cfa_register:
805 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
808 *regp = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
809 *offsetp = cfi->dw_cfi_oprnd2.dw_cfi_offset;
816 /* Find the previous value for the CFA. */
819 lookup_cfa (regp, offsetp)
820 register unsigned long *regp;
821 register long *offsetp;
823 register dw_cfi_ref cfi;
825 *regp = (unsigned long) -1;
828 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
829 lookup_cfa_1 (cfi, regp, offsetp);
831 if (fde_table_in_use)
833 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
834 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
835 lookup_cfa_1 (cfi, regp, offsetp);
839 /* The current rule for calculating the DWARF2 canonical frame address. */
840 static unsigned long cfa_reg;
841 static long cfa_offset;
843 /* The register used for saving registers to the stack, and its offset
845 static unsigned cfa_store_reg;
846 static long cfa_store_offset;
848 /* The running total of the size of arguments pushed onto the stack. */
849 static long args_size;
851 /* The last args_size we actually output. */
852 static long old_args_size;
854 /* Entry point to update the canonical frame address (CFA).
855 LABEL is passed to add_fde_cfi. The value of CFA is now to be
856 calculated from REG+OFFSET. */
859 dwarf2out_def_cfa (label, reg, offset)
860 register char *label;
861 register unsigned reg;
862 register long offset;
864 register dw_cfi_ref cfi;
865 unsigned long old_reg;
870 if (cfa_store_reg == reg)
871 cfa_store_offset = offset;
873 reg = DWARF_FRAME_REGNUM (reg);
874 lookup_cfa (&old_reg, &old_offset);
876 if (reg == old_reg && offset == old_offset)
883 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
884 cfi->dw_cfi_oprnd1.dw_cfi_offset = offset;
887 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
888 else if (offset == old_offset && old_reg != (unsigned long) -1)
890 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
891 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
897 cfi->dw_cfi_opc = DW_CFA_def_cfa;
898 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
899 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
902 add_fde_cfi (label, cfi);
905 /* Add the CFI for saving a register. REG is the CFA column number.
906 LABEL is passed to add_fde_cfi.
907 If SREG is -1, the register is saved at OFFSET from the CFA;
908 otherwise it is saved in SREG. */
911 reg_save (label, reg, sreg, offset)
912 register char * label;
913 register unsigned reg;
914 register unsigned sreg;
915 register long offset;
917 register dw_cfi_ref cfi = new_cfi ();
919 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
921 /* The following comparison is correct. -1 is used to indicate that
922 the value isn't a register number. */
923 if (sreg == (unsigned int) -1)
926 /* The register number won't fit in 6 bits, so we have to use
928 cfi->dw_cfi_opc = DW_CFA_offset_extended;
930 cfi->dw_cfi_opc = DW_CFA_offset;
932 offset /= DWARF_CIE_DATA_ALIGNMENT;
935 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
939 cfi->dw_cfi_opc = DW_CFA_register;
940 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
943 add_fde_cfi (label, cfi);
946 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
947 This CFI tells the unwinder that it needs to restore the window registers
948 from the previous frame's window save area.
950 ??? Perhaps we should note in the CIE where windows are saved (instead of
951 assuming 0(cfa)) and what registers are in the window. */
954 dwarf2out_window_save (label)
955 register char * label;
957 register dw_cfi_ref cfi = new_cfi ();
958 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
959 add_fde_cfi (label, cfi);
962 /* Add a CFI to update the running total of the size of arguments
963 pushed onto the stack. */
966 dwarf2out_args_size (label, size)
970 register dw_cfi_ref cfi;
972 if (size == old_args_size)
974 old_args_size = size;
977 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
978 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
979 add_fde_cfi (label, cfi);
982 /* Entry point for saving a register to the stack. REG is the GCC register
983 number. LABEL and OFFSET are passed to reg_save. */
986 dwarf2out_reg_save (label, reg, offset)
987 register char * label;
988 register unsigned reg;
989 register long offset;
991 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
994 /* Entry point for saving the return address in the stack.
995 LABEL and OFFSET are passed to reg_save. */
998 dwarf2out_return_save (label, offset)
999 register char * label;
1000 register long offset;
1002 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1005 /* Entry point for saving the return address in a register.
1006 LABEL and SREG are passed to reg_save. */
1009 dwarf2out_return_reg (label, sreg)
1010 register char * label;
1011 register unsigned sreg;
1013 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1016 /* Record the initial position of the return address. RTL is
1017 INCOMING_RETURN_ADDR_RTX. */
1020 initial_return_save (rtl)
1026 switch (GET_CODE (rtl))
1029 /* RA is in a register. */
1030 reg = reg_number (rtl);
1033 /* RA is on the stack. */
1034 rtl = XEXP (rtl, 0);
1035 switch (GET_CODE (rtl))
1038 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1043 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1045 offset = INTVAL (XEXP (rtl, 1));
1048 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1050 offset = -INTVAL (XEXP (rtl, 1));
1057 /* The return address is at some offset from any value we can
1058 actually load. For instance, on the SPARC it is in %i7+8. Just
1059 ignore the offset for now; it doesn't matter for unwinding frames. */
1060 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1062 initial_return_save (XEXP (rtl, 0));
1068 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa_offset);
1071 /* Check INSN to see if it looks like a push or a stack adjustment, and
1072 make a note of it if it does. EH uses this information to find out how
1073 much extra space it needs to pop off the stack. */
1076 dwarf2out_stack_adjust (insn)
1082 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1084 /* Extract the size of the args from the CALL rtx itself. */
1086 insn = PATTERN (insn);
1087 if (GET_CODE (insn) == PARALLEL)
1088 insn = XVECEXP (insn, 0, 0);
1089 if (GET_CODE (insn) == SET)
1090 insn = SET_SRC (insn);
1091 assert (GET_CODE (insn) == CALL);
1092 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1096 /* If only calls can throw, and we have a frame pointer,
1097 save up adjustments until we see the CALL_INSN. */
1098 else if (! asynchronous_exceptions
1099 && cfa_reg != STACK_POINTER_REGNUM)
1102 if (GET_CODE (insn) == BARRIER)
1104 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1105 the compiler will have already emitted a stack adjustment, but
1106 doesn't bother for calls to noreturn functions. */
1107 #ifdef STACK_GROWS_DOWNWARD
1108 offset = -args_size;
1113 else if (GET_CODE (PATTERN (insn)) == SET)
1118 insn = PATTERN (insn);
1119 src = SET_SRC (insn);
1120 dest = SET_DEST (insn);
1122 if (dest == stack_pointer_rtx)
1124 /* (set (reg sp) (plus (reg sp) (const_int))) */
1125 code = GET_CODE (src);
1126 if (! (code == PLUS || code == MINUS)
1127 || XEXP (src, 0) != stack_pointer_rtx
1128 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1131 offset = INTVAL (XEXP (src, 1));
1133 else if (GET_CODE (dest) == MEM)
1135 /* (set (mem (pre_dec (reg sp))) (foo)) */
1136 src = XEXP (dest, 0);
1137 code = GET_CODE (src);
1139 if (! (code == PRE_DEC || code == PRE_INC)
1140 || XEXP (src, 0) != stack_pointer_rtx)
1143 offset = GET_MODE_SIZE (GET_MODE (dest));
1148 if (code == PLUS || code == PRE_INC)
1157 if (cfa_reg == STACK_POINTER_REGNUM)
1158 cfa_offset += offset;
1160 #ifndef STACK_GROWS_DOWNWARD
1163 args_size += offset;
1167 label = dwarf2out_cfi_label ();
1168 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1169 dwarf2out_args_size (label, args_size);
1172 /* Record call frame debugging information for INSN, which either
1173 sets SP or FP (adjusting how we calculate the frame address) or saves a
1174 register to the stack. If INSN is NULL_RTX, initialize our state. */
1177 dwarf2out_frame_debug (insn)
1184 /* A temporary register used in adjusting SP or setting up the store_reg. */
1185 static unsigned cfa_temp_reg;
1186 static long cfa_temp_value;
1188 if (insn == NULL_RTX)
1190 /* Set up state for generating call frame debug info. */
1191 lookup_cfa (&cfa_reg, &cfa_offset);
1192 if (cfa_reg != DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1194 cfa_reg = STACK_POINTER_REGNUM;
1195 cfa_store_reg = cfa_reg;
1196 cfa_store_offset = cfa_offset;
1202 if (! RTX_FRAME_RELATED_P (insn))
1204 dwarf2out_stack_adjust (insn);
1208 label = dwarf2out_cfi_label ();
1210 insn = PATTERN (insn);
1211 /* Assume that in a PARALLEL prologue insn, only the first elt is
1212 significant. Currently this is true. */
1213 if (GET_CODE (insn) == PARALLEL)
1214 insn = XVECEXP (insn, 0, 0);
1215 if (GET_CODE (insn) != SET)
1218 src = SET_SRC (insn);
1219 dest = SET_DEST (insn);
1221 switch (GET_CODE (dest))
1224 /* Update the CFA rule wrt SP or FP. Make sure src is
1225 relative to the current CFA register. */
1226 switch (GET_CODE (src))
1228 /* Setting FP from SP. */
1230 if (cfa_reg != REGNO (src))
1232 if (REGNO (dest) != STACK_POINTER_REGNUM
1233 && !(frame_pointer_needed
1234 && REGNO (dest) == HARD_FRAME_POINTER_REGNUM))
1236 cfa_reg = REGNO (dest);
1241 if (dest == stack_pointer_rtx)
1244 switch (GET_CODE (XEXP (src, 1)))
1247 offset = INTVAL (XEXP (src, 1));
1250 if (REGNO (XEXP (src, 1)) != cfa_temp_reg)
1252 offset = cfa_temp_value;
1258 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1260 /* Restoring SP from FP in the epilogue. */
1261 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1263 cfa_reg = STACK_POINTER_REGNUM;
1265 else if (XEXP (src, 0) != stack_pointer_rtx)
1268 if (GET_CODE (src) == PLUS)
1270 if (cfa_reg == STACK_POINTER_REGNUM)
1271 cfa_offset += offset;
1272 if (cfa_store_reg == STACK_POINTER_REGNUM)
1273 cfa_store_offset += offset;
1275 else if (dest == hard_frame_pointer_rtx)
1277 /* Either setting the FP from an offset of the SP,
1278 or adjusting the FP */
1279 if (! frame_pointer_needed
1280 || REGNO (dest) != HARD_FRAME_POINTER_REGNUM)
1283 if (XEXP (src, 0) == stack_pointer_rtx
1284 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1286 if (cfa_reg != STACK_POINTER_REGNUM)
1288 offset = INTVAL (XEXP (src, 1));
1289 if (GET_CODE (src) == PLUS)
1291 cfa_offset += offset;
1292 cfa_reg = HARD_FRAME_POINTER_REGNUM;
1294 else if (XEXP (src, 0) == hard_frame_pointer_rtx
1295 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1297 if (cfa_reg != HARD_FRAME_POINTER_REGNUM)
1299 offset = INTVAL (XEXP (src, 1));
1300 if (GET_CODE (src) == PLUS)
1302 cfa_offset += offset;
1310 if (GET_CODE (src) != PLUS
1311 || XEXP (src, 1) != stack_pointer_rtx)
1313 if (GET_CODE (XEXP (src, 0)) != REG
1314 || REGNO (XEXP (src, 0)) != cfa_temp_reg)
1316 if (cfa_reg != STACK_POINTER_REGNUM)
1318 cfa_store_reg = REGNO (dest);
1319 cfa_store_offset = cfa_offset - cfa_temp_value;
1324 cfa_temp_reg = REGNO (dest);
1325 cfa_temp_value = INTVAL (src);
1329 if (GET_CODE (XEXP (src, 0)) != REG
1330 || REGNO (XEXP (src, 0)) != cfa_temp_reg
1331 || REGNO (dest) != cfa_temp_reg
1332 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1334 cfa_temp_value |= INTVAL (XEXP (src, 1));
1340 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1344 /* Saving a register to the stack. Make sure dest is relative to the
1346 if (GET_CODE (src) != REG)
1348 switch (GET_CODE (XEXP (dest, 0)))
1353 offset = GET_MODE_SIZE (GET_MODE (dest));
1354 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1357 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1358 || cfa_store_reg != STACK_POINTER_REGNUM)
1360 cfa_store_offset += offset;
1361 if (cfa_reg == STACK_POINTER_REGNUM)
1362 cfa_offset = cfa_store_offset;
1364 offset = -cfa_store_offset;
1367 /* With an offset. */
1370 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1371 if (GET_CODE (src) == MINUS)
1374 if (cfa_store_reg != REGNO (XEXP (XEXP (dest, 0), 0)))
1376 offset -= cfa_store_offset;
1382 dwarf2out_def_cfa (label, cfa_reg, cfa_offset);
1383 dwarf2out_reg_save (label, REGNO (src), offset);
1391 /* Return the size of an unsigned LEB128 quantity. */
1393 static inline unsigned long
1394 size_of_uleb128 (value)
1395 register unsigned long value;
1397 register unsigned long size = 0;
1398 register unsigned byte;
1402 byte = (value & 0x7f);
1411 /* Return the size of a signed LEB128 quantity. */
1413 static inline unsigned long
1414 size_of_sleb128 (value)
1415 register long value;
1417 register unsigned long size = 0;
1418 register unsigned byte;
1422 byte = (value & 0x7f);
1426 while (!(((value == 0) && ((byte & 0x40) == 0))
1427 || ((value == -1) && ((byte & 0x40) != 0))));
1432 /* Output an unsigned LEB128 quantity. */
1435 output_uleb128 (value)
1436 register unsigned long value;
1438 unsigned long save_value = value;
1440 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1443 register unsigned byte = (value & 0x7f);
1446 /* More bytes to follow. */
1449 fprintf (asm_out_file, "0x%x", byte);
1451 fprintf (asm_out_file, ",");
1456 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1459 /* Output an signed LEB128 quantity. */
1462 output_sleb128 (value)
1463 register long value;
1466 register unsigned byte;
1467 long save_value = value;
1469 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1472 byte = (value & 0x7f);
1473 /* arithmetic shift */
1475 more = !((((value == 0) && ((byte & 0x40) == 0))
1476 || ((value == -1) && ((byte & 0x40) != 0))));
1480 fprintf (asm_out_file, "0x%x", byte);
1482 fprintf (asm_out_file, ",");
1487 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1490 /* Output a Call Frame Information opcode and its operand(s). */
1493 output_cfi (cfi, fde)
1494 register dw_cfi_ref cfi;
1495 register dw_fde_ref fde;
1497 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1499 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1501 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1503 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1504 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1505 fputc ('\n', asm_out_file);
1508 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1510 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1512 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1514 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1515 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1517 fputc ('\n', asm_out_file);
1518 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1519 fputc ('\n', asm_out_file);
1521 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1523 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1525 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1527 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1528 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1530 fputc ('\n', asm_out_file);
1534 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1536 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1537 dwarf_cfi_name (cfi->dw_cfi_opc));
1539 fputc ('\n', asm_out_file);
1540 switch (cfi->dw_cfi_opc)
1542 case DW_CFA_set_loc:
1543 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1544 fputc ('\n', asm_out_file);
1546 case DW_CFA_advance_loc1:
1547 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1548 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1549 fde->dw_fde_current_label);
1550 fputc ('\n', asm_out_file);
1551 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1553 case DW_CFA_advance_loc2:
1554 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1555 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1556 fde->dw_fde_current_label);
1557 fputc ('\n', asm_out_file);
1558 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1560 case DW_CFA_advance_loc4:
1561 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1562 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1563 fde->dw_fde_current_label);
1564 fputc ('\n', asm_out_file);
1565 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1567 #ifdef MIPS_DEBUGGING_INFO
1568 case DW_CFA_MIPS_advance_loc8:
1569 /* TODO: not currently implemented. */
1573 case DW_CFA_offset_extended:
1574 case DW_CFA_def_cfa:
1575 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1576 fputc ('\n', asm_out_file);
1577 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1578 fputc ('\n', asm_out_file);
1580 case DW_CFA_restore_extended:
1581 case DW_CFA_undefined:
1582 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1583 fputc ('\n', asm_out_file);
1585 case DW_CFA_same_value:
1586 case DW_CFA_def_cfa_register:
1587 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1588 fputc ('\n', asm_out_file);
1590 case DW_CFA_register:
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_reg_num);
1594 fputc ('\n', asm_out_file);
1596 case DW_CFA_def_cfa_offset:
1597 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1598 fputc ('\n', asm_out_file);
1600 case DW_CFA_GNU_window_save:
1602 case DW_CFA_GNU_args_size:
1603 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1604 fputc ('\n', asm_out_file);
1612 #if !defined (EH_FRAME_SECTION)
1613 #if defined (EH_FRAME_SECTION_ASM_OP)
1614 #define EH_FRAME_SECTION() eh_frame_section();
1616 #if defined (ASM_OUTPUT_SECTION_NAME)
1617 #define EH_FRAME_SECTION() \
1619 named_section (NULL_TREE, ".eh_frame", 0); \
1625 /* Output the call frame information used to used to record information
1626 that relates to calculating the frame pointer, and records the
1627 location of saved registers. */
1630 output_call_frame_info (for_eh)
1633 register unsigned long i;
1634 register dw_fde_ref fde;
1635 register dw_cfi_ref cfi;
1636 char l1[20], l2[20];
1637 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1641 /* Do we want to include a pointer to the exception table? */
1642 int eh_ptr = for_eh && exception_table_p ();
1644 fputc ('\n', asm_out_file);
1646 /* We're going to be generating comments, so turn on app. */
1652 #ifdef EH_FRAME_SECTION
1653 EH_FRAME_SECTION ();
1655 tree label = get_file_function_name ('F');
1658 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1659 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1660 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1662 assemble_label ("__FRAME_BEGIN__");
1665 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1667 /* Output the CIE. */
1668 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1669 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1670 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1671 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1673 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1675 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1678 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1680 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1683 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1686 fputc ('\n', asm_out_file);
1687 ASM_OUTPUT_LABEL (asm_out_file, l1);
1690 /* Now that the CIE pointer is PC-relative for EH,
1691 use 0 to identify the CIE. */
1692 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1694 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1697 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1699 fputc ('\n', asm_out_file);
1700 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1702 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1703 fputc ('\n', asm_out_file);
1706 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1708 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1710 fputc ('\n', asm_out_file);
1713 /* The CIE contains a pointer to the exception region info for the
1714 frame. Make the augmentation string three bytes (including the
1715 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1716 can't handle unaligned relocs. */
1719 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1720 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1724 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1726 fputc ('\n', asm_out_file);
1728 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1730 fprintf (asm_out_file, "\t%s pointer to exception region info",
1735 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1737 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1741 fputc ('\n', asm_out_file);
1744 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1746 fputc ('\n', asm_out_file);
1747 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1749 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1751 fputc ('\n', asm_out_file);
1752 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1754 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1756 fputc ('\n', asm_out_file);
1758 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1759 output_cfi (cfi, NULL);
1761 /* Pad the CIE out to an address sized boundary. */
1762 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1763 ASM_OUTPUT_LABEL (asm_out_file, l2);
1764 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1765 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1767 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1768 fputc ('\n', asm_out_file);
1771 /* Loop through all of the FDE's. */
1772 for (i = 0; i < fde_table_in_use; ++i)
1774 fde = &fde_table[i];
1776 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i*2);
1777 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i*2);
1778 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1779 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i*2);
1781 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1783 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1786 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1788 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1791 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1792 fputc ('\n', asm_out_file);
1793 ASM_OUTPUT_LABEL (asm_out_file, l1);
1796 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l1, "__FRAME_BEGIN__");
1798 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1800 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1802 fputc ('\n', asm_out_file);
1803 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1805 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1807 fputc ('\n', asm_out_file);
1808 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1809 fde->dw_fde_end, fde->dw_fde_begin);
1811 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1813 fputc ('\n', asm_out_file);
1815 /* Loop through the Call Frame Instructions associated with
1817 fde->dw_fde_current_label = fde->dw_fde_begin;
1818 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1819 output_cfi (cfi, fde);
1821 /* Pad the FDE out to an address sized boundary. */
1822 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (PTR_SIZE));
1823 ASM_OUTPUT_LABEL (asm_out_file, l2);
1824 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1825 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1827 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1828 fputc ('\n', asm_out_file);
1831 #ifndef EH_FRAME_SECTION
1834 /* Emit terminating zero for table. */
1835 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1836 fputc ('\n', asm_out_file);
1839 #ifdef MIPS_DEBUGGING_INFO
1840 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1841 get a value of 0. Putting .align 0 after the label fixes it. */
1842 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1845 /* Turn off app to make assembly quicker. */
1850 /* Output a marker (i.e. a label) for the beginning of a function, before
1854 dwarf2out_begin_prologue ()
1856 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1857 register dw_fde_ref fde;
1859 ++current_funcdef_number;
1861 function_section (current_function_decl);
1862 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1863 current_funcdef_number);
1864 ASM_OUTPUT_LABEL (asm_out_file, label);
1866 /* Expand the fde table if necessary. */
1867 if (fde_table_in_use == fde_table_allocated)
1869 fde_table_allocated += FDE_TABLE_INCREMENT;
1871 = (dw_fde_ref) xrealloc (fde_table,
1872 fde_table_allocated * sizeof (dw_fde_node));
1875 /* Record the FDE associated with this function. */
1876 current_funcdef_fde = fde_table_in_use;
1878 /* Add the new FDE at the end of the fde_table. */
1879 fde = &fde_table[fde_table_in_use++];
1880 fde->dw_fde_begin = xstrdup (label);
1881 fde->dw_fde_current_label = NULL;
1882 fde->dw_fde_end = NULL;
1883 fde->dw_fde_cfi = NULL;
1885 args_size = old_args_size = 0;
1888 /* Output a marker (i.e. a label) for the absolute end of the generated code
1889 for a function definition. This gets called *after* the epilogue code has
1893 dwarf2out_end_epilogue ()
1896 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1898 /* Output a label to mark the endpoint of the code generated for this
1900 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
1901 ASM_OUTPUT_LABEL (asm_out_file, label);
1902 fde = &fde_table[fde_table_in_use - 1];
1903 fde->dw_fde_end = xstrdup (label);
1907 dwarf2out_frame_init ()
1909 /* Allocate the initial hunk of the fde_table. */
1911 = (dw_fde_ref) xmalloc (FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1912 bzero ((char *) fde_table, FDE_TABLE_INCREMENT * sizeof (dw_fde_node));
1913 fde_table_allocated = FDE_TABLE_INCREMENT;
1914 fde_table_in_use = 0;
1916 /* Generate the CFA instructions common to all FDE's. Do it now for the
1917 sake of lookup_cfa. */
1919 #ifdef DWARF2_UNWIND_INFO
1920 /* On entry, the Canonical Frame Address is at SP. */
1921 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
1922 initial_return_save (INCOMING_RETURN_ADDR_RTX);
1927 dwarf2out_frame_finish ()
1929 /* Output call frame information. */
1930 #ifdef MIPS_DEBUGGING_INFO
1931 if (write_symbols == DWARF2_DEBUG)
1932 output_call_frame_info (0);
1933 if (flag_exceptions && ! exceptions_via_longjmp)
1934 output_call_frame_info (1);
1936 if (write_symbols == DWARF2_DEBUG
1937 || (flag_exceptions && ! exceptions_via_longjmp))
1938 output_call_frame_info (1);
1942 #endif /* .debug_frame support */
1944 /* And now, the support for symbolic debugging information. */
1945 #ifdef DWARF2_DEBUGGING_INFO
1947 extern char *getpwd ();
1949 /* NOTE: In the comments in this file, many references are made to
1950 "Debugging Information Entries". This term is abbreviated as `DIE'
1951 throughout the remainder of this file. */
1953 /* An internal representation of the DWARF output is built, and then
1954 walked to generate the DWARF debugging info. The walk of the internal
1955 representation is done after the entire program has been compiled.
1956 The types below are used to describe the internal representation. */
1958 /* Each DIE may have a series of attribute/value pairs. Values
1959 can take on several forms. The forms that are used in this
1960 implementation are listed below. */
1967 dw_val_class_unsigned_const,
1968 dw_val_class_long_long,
1971 dw_val_class_die_ref,
1972 dw_val_class_fde_ref,
1973 dw_val_class_lbl_id,
1974 dw_val_class_section_offset,
1979 /* Various DIE's use offsets relative to the beginning of the
1980 .debug_info section to refer to each other. */
1982 typedef long int dw_offset;
1984 /* Define typedefs here to avoid circular dependencies. */
1986 typedef struct die_struct *dw_die_ref;
1987 typedef struct dw_attr_struct *dw_attr_ref;
1988 typedef struct dw_val_struct *dw_val_ref;
1989 typedef struct dw_line_info_struct *dw_line_info_ref;
1990 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
1991 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
1992 typedef struct pubname_struct *pubname_ref;
1993 typedef dw_die_ref *arange_ref;
1995 /* Describe a double word constant value. */
1997 typedef struct dw_long_long_struct
2004 /* Describe a floating point constant value. */
2006 typedef struct dw_fp_struct
2013 /* Each entry in the line_info_table maintains the file and
2014 line number associated with the label generated for that
2015 entry. The label gives the PC value associated with
2016 the line number entry. */
2018 typedef struct dw_line_info_struct
2020 unsigned long dw_file_num;
2021 unsigned long dw_line_num;
2025 /* Line information for functions in separate sections; each one gets its
2027 typedef struct dw_separate_line_info_struct
2029 unsigned long dw_file_num;
2030 unsigned long dw_line_num;
2031 unsigned long function;
2033 dw_separate_line_info_entry;
2035 /* The dw_val_node describes an attribute's value, as it is
2036 represented internally. */
2038 typedef struct dw_val_struct
2040 dw_val_class val_class;
2044 dw_loc_descr_ref val_loc;
2046 long unsigned val_unsigned;
2047 dw_long_long_const val_long_long;
2048 dw_float_const val_float;
2049 dw_die_ref val_die_ref;
2050 unsigned val_fde_index;
2054 unsigned char val_flag;
2060 /* Locations in memory are described using a sequence of stack machine
2063 typedef struct dw_loc_descr_struct
2065 dw_loc_descr_ref dw_loc_next;
2066 enum dwarf_location_atom dw_loc_opc;
2067 dw_val_node dw_loc_oprnd1;
2068 dw_val_node dw_loc_oprnd2;
2072 /* Each DIE attribute has a field specifying the attribute kind,
2073 a link to the next attribute in the chain, and an attribute value.
2074 Attributes are typically linked below the DIE they modify. */
2076 typedef struct dw_attr_struct
2078 enum dwarf_attribute dw_attr;
2079 dw_attr_ref dw_attr_next;
2080 dw_val_node dw_attr_val;
2084 /* The Debugging Information Entry (DIE) structure */
2086 typedef struct die_struct
2088 enum dwarf_tag die_tag;
2089 dw_attr_ref die_attr;
2090 dw_attr_ref die_attr_last;
2091 dw_die_ref die_parent;
2092 dw_die_ref die_child;
2093 dw_die_ref die_child_last;
2095 dw_offset die_offset;
2096 unsigned long die_abbrev;
2100 /* The pubname structure */
2102 typedef struct pubname_struct
2109 /* The limbo die list structure. */
2110 typedef struct limbo_die_struct
2113 struct limbo_die_struct *next;
2117 /* How to start an assembler comment. */
2118 #ifndef ASM_COMMENT_START
2119 #define ASM_COMMENT_START ";#"
2122 /* Define a macro which returns non-zero for a TYPE_DECL which was
2123 implicitly generated for a tagged type.
2125 Note that unlike the gcc front end (which generates a NULL named
2126 TYPE_DECL node for each complete tagged type, each array type, and
2127 each function type node created) the g++ front end generates a
2128 _named_ TYPE_DECL node for each tagged type node created.
2129 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2130 generate a DW_TAG_typedef DIE for them. */
2132 #define TYPE_DECL_IS_STUB(decl) \
2133 (DECL_NAME (decl) == NULL_TREE \
2134 || (DECL_ARTIFICIAL (decl) \
2135 && is_tagged_type (TREE_TYPE (decl)) \
2136 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2137 /* This is necessary for stub decls that \
2138 appear in nested inline functions. */ \
2139 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2140 && (decl_ultimate_origin (decl) \
2141 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2143 /* Information concerning the compilation unit's programming
2144 language, and compiler version. */
2146 extern int flag_traditional;
2147 extern char *version_string;
2148 extern char *language_string;
2150 /* Fixed size portion of the DWARF compilation unit header. */
2151 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2153 /* Fixed size portion of debugging line information prolog. */
2154 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2156 /* Fixed size portion of public names info. */
2157 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2159 /* Fixed size portion of the address range info. */
2160 #define DWARF_ARANGES_HEADER_SIZE \
2161 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2163 /* Define the architecture-dependent minimum instruction length (in bytes).
2164 In this implementation of DWARF, this field is used for information
2165 purposes only. Since GCC generates assembly language, we have
2166 no a priori knowledge of how many instruction bytes are generated
2167 for each source line, and therefore can use only the DW_LNE_set_address
2168 and DW_LNS_fixed_advance_pc line information commands. */
2170 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2171 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2174 /* Minimum line offset in a special line info. opcode.
2175 This value was chosen to give a reasonable range of values. */
2176 #define DWARF_LINE_BASE -10
2178 /* First special line opcde - leave room for the standard opcodes. */
2179 #define DWARF_LINE_OPCODE_BASE 10
2181 /* Range of line offsets in a special line info. opcode. */
2182 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2184 /* Flag that indicates the initial value of the is_stmt_start flag.
2185 In the present implementation, we do not mark any lines as
2186 the beginning of a source statement, because that information
2187 is not made available by the GCC front-end. */
2188 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2190 /* This location is used by calc_die_sizes() to keep track
2191 the offset of each DIE within the .debug_info section. */
2192 static unsigned long next_die_offset;
2194 /* Record the root of the DIE's built for the current compilation unit. */
2195 static dw_die_ref comp_unit_die;
2197 /* A list of DIEs with a NULL parent waiting to be relocated. */
2198 static limbo_die_node *limbo_die_list = 0;
2200 /* Pointer to an array of filenames referenced by this compilation unit. */
2201 static char **file_table;
2203 /* Total number of entries in the table (i.e. array) pointed to by
2204 `file_table'. This is the *total* and includes both used and unused
2206 static unsigned file_table_allocated;
2208 /* Number of entries in the file_table which are actually in use. */
2209 static unsigned file_table_in_use;
2211 /* Size (in elements) of increments by which we may expand the filename
2213 #define FILE_TABLE_INCREMENT 64
2215 /* Local pointer to the name of the main input file. Initialized in
2217 static char *primary_filename;
2219 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2220 which their beginnings are encountered. We output Dwarf debugging info
2221 that refers to the beginnings and ends of the ranges of code for each
2222 lexical block. The labels themselves are generated in final.c, which
2223 assigns numbers to the blocks in the same way. */
2224 static unsigned next_block_number = 2;
2226 /* A pointer to the base of a table of references to DIE's that describe
2227 declarations. The table is indexed by DECL_UID() which is a unique
2228 number identifying each decl. */
2229 static dw_die_ref *decl_die_table;
2231 /* Number of elements currently allocated for the decl_die_table. */
2232 static unsigned decl_die_table_allocated;
2234 /* Number of elements in decl_die_table currently in use. */
2235 static unsigned decl_die_table_in_use;
2237 /* Size (in elements) of increments by which we may expand the
2239 #define DECL_DIE_TABLE_INCREMENT 256
2241 /* Structure used for the decl_scope table. scope is the current declaration
2242 scope, and previous is the entry that is the parent of this scope. This
2243 is usually but not always the immediately preceeding entry. */
2245 typedef struct decl_scope_struct
2252 /* A pointer to the base of a table of references to declaration
2253 scopes. This table is a display which tracks the nesting
2254 of declaration scopes at the current scope and containing
2255 scopes. This table is used to find the proper place to
2256 define type declaration DIE's. */
2257 static decl_scope_node *decl_scope_table;
2259 /* Number of elements currently allocated for the decl_scope_table. */
2260 static int decl_scope_table_allocated;
2262 /* Current level of nesting of declaration scopes. */
2263 static int decl_scope_depth;
2265 /* Size (in elements) of increments by which we may expand the
2266 decl_scope_table. */
2267 #define DECL_SCOPE_TABLE_INCREMENT 64
2269 /* A pointer to the base of a list of references to DIE's that
2270 are uniquely identified by their tag, presence/absence of
2271 children DIE's, and list of attribute/value pairs. */
2272 static dw_die_ref *abbrev_die_table;
2274 /* Number of elements currently allocated for abbrev_die_table. */
2275 static unsigned abbrev_die_table_allocated;
2277 /* Number of elements in type_die_table currently in use. */
2278 static unsigned abbrev_die_table_in_use;
2280 /* Size (in elements) of increments by which we may expand the
2281 abbrev_die_table. */
2282 #define ABBREV_DIE_TABLE_INCREMENT 256
2284 /* A pointer to the base of a table that contains line information
2285 for each source code line in .text in the compilation unit. */
2286 static dw_line_info_ref line_info_table;
2288 /* Number of elements currently allocated for line_info_table. */
2289 static unsigned line_info_table_allocated;
2291 /* Number of elements in separate_line_info_table currently in use. */
2292 static unsigned separate_line_info_table_in_use;
2294 /* A pointer to the base of a table that contains line information
2295 for each source code line outside of .text in the compilation unit. */
2296 static dw_separate_line_info_ref separate_line_info_table;
2298 /* Number of elements currently allocated for separate_line_info_table. */
2299 static unsigned separate_line_info_table_allocated;
2301 /* Number of elements in line_info_table currently in use. */
2302 static unsigned line_info_table_in_use;
2304 /* Size (in elements) of increments by which we may expand the
2306 #define LINE_INFO_TABLE_INCREMENT 1024
2308 /* A pointer to the base of a table that contains a list of publicly
2309 accessible names. */
2310 static pubname_ref pubname_table;
2312 /* Number of elements currently allocated for pubname_table. */
2313 static unsigned pubname_table_allocated;
2315 /* Number of elements in pubname_table currently in use. */
2316 static unsigned pubname_table_in_use;
2318 /* Size (in elements) of increments by which we may expand the
2320 #define PUBNAME_TABLE_INCREMENT 64
2322 /* A pointer to the base of a table that contains a list of publicly
2323 accessible names. */
2324 static arange_ref arange_table;
2326 /* Number of elements currently allocated for arange_table. */
2327 static unsigned arange_table_allocated;
2329 /* Number of elements in arange_table currently in use. */
2330 static unsigned arange_table_in_use;
2332 /* Size (in elements) of increments by which we may expand the
2334 #define ARANGE_TABLE_INCREMENT 64
2336 /* A pointer to the base of a list of pending types which we haven't
2337 generated DIEs for yet, but which we will have to come back to
2340 static tree *pending_types_list;
2342 /* Number of elements currently allocated for the pending_types_list. */
2343 static unsigned pending_types_allocated;
2345 /* Number of elements of pending_types_list currently in use. */
2346 static unsigned pending_types;
2348 /* Size (in elements) of increments by which we may expand the pending
2349 types list. Actually, a single hunk of space of this size should
2350 be enough for most typical programs. */
2351 #define PENDING_TYPES_INCREMENT 64
2353 /* Record whether the function being analyzed contains inlined functions. */
2354 static int current_function_has_inlines;
2355 #if 0 && defined (MIPS_DEBUGGING_INFO)
2356 static int comp_unit_has_inlines;
2359 /* A pointer to the ..._DECL node which we have most recently been working
2360 on. We keep this around just in case something about it looks screwy and
2361 we want to tell the user what the source coordinates for the actual
2363 static tree dwarf_last_decl;
2365 /* Forward declarations for functions defined in this file. */
2367 static void addr_const_to_string PROTO((char *, rtx));
2368 static char *addr_to_string PROTO((rtx));
2369 static int is_pseudo_reg PROTO((rtx));
2370 static tree type_main_variant PROTO((tree));
2371 static int is_tagged_type PROTO((tree));
2372 static char *dwarf_tag_name PROTO((unsigned));
2373 static char *dwarf_attr_name PROTO((unsigned));
2374 static char *dwarf_form_name PROTO((unsigned));
2375 static char *dwarf_stack_op_name PROTO((unsigned));
2377 static char *dwarf_type_encoding_name PROTO((unsigned));
2379 static tree decl_ultimate_origin PROTO((tree));
2380 static tree block_ultimate_origin PROTO((tree));
2381 static tree decl_class_context PROTO((tree));
2382 static void add_dwarf_attr PROTO((dw_die_ref, dw_attr_ref));
2383 static void add_AT_flag PROTO((dw_die_ref,
2384 enum dwarf_attribute,
2386 static void add_AT_int PROTO((dw_die_ref,
2387 enum dwarf_attribute, long));
2388 static void add_AT_unsigned PROTO((dw_die_ref,
2389 enum dwarf_attribute,
2391 static void add_AT_long_long PROTO((dw_die_ref,
2392 enum dwarf_attribute,
2393 unsigned long, unsigned long));
2394 static void add_AT_float PROTO((dw_die_ref,
2395 enum dwarf_attribute,
2397 static void add_AT_string PROTO((dw_die_ref,
2398 enum dwarf_attribute, char *));
2399 static void add_AT_die_ref PROTO((dw_die_ref,
2400 enum dwarf_attribute,
2402 static void add_AT_fde_ref PROTO((dw_die_ref,
2403 enum dwarf_attribute,
2405 static void add_AT_loc PROTO((dw_die_ref,
2406 enum dwarf_attribute,
2408 static void add_AT_addr PROTO((dw_die_ref,
2409 enum dwarf_attribute, char *));
2410 static void add_AT_lbl_id PROTO((dw_die_ref,
2411 enum dwarf_attribute, char *));
2412 static void add_AT_section_offset PROTO((dw_die_ref,
2413 enum dwarf_attribute, char *));
2414 static int is_extern_subr_die PROTO((dw_die_ref));
2415 static dw_attr_ref get_AT PROTO((dw_die_ref,
2416 enum dwarf_attribute));
2417 static char *get_AT_low_pc PROTO((dw_die_ref));
2418 static char *get_AT_hi_pc PROTO((dw_die_ref));
2419 static char *get_AT_string PROTO((dw_die_ref,
2420 enum dwarf_attribute));
2421 static int get_AT_flag PROTO((dw_die_ref,
2422 enum dwarf_attribute));
2423 static unsigned get_AT_unsigned PROTO((dw_die_ref,
2424 enum dwarf_attribute));
2425 static int is_c_family PROTO((void));
2426 static int is_fortran PROTO((void));
2427 static void remove_AT PROTO((dw_die_ref,
2428 enum dwarf_attribute));
2429 static void remove_children PROTO((dw_die_ref));
2430 static void add_child_die PROTO((dw_die_ref, dw_die_ref));
2431 static dw_die_ref new_die PROTO((enum dwarf_tag, dw_die_ref));
2432 static dw_die_ref lookup_type_die PROTO((tree));
2433 static void equate_type_number_to_die PROTO((tree, dw_die_ref));
2434 static dw_die_ref lookup_decl_die PROTO((tree));
2435 static void equate_decl_number_to_die PROTO((tree, dw_die_ref));
2436 static dw_loc_descr_ref new_loc_descr PROTO((enum dwarf_location_atom,
2437 unsigned long, unsigned long));
2438 static void add_loc_descr PROTO((dw_loc_descr_ref *,
2440 static void print_spaces PROTO((FILE *));
2441 static void print_die PROTO((dw_die_ref, FILE *));
2442 static void print_dwarf_line_table PROTO((FILE *));
2443 static void add_sibling_attributes PROTO((dw_die_ref));
2444 static void build_abbrev_table PROTO((dw_die_ref));
2445 static unsigned long size_of_string PROTO((char *));
2446 static unsigned long size_of_loc_descr PROTO((dw_loc_descr_ref));
2447 static unsigned long size_of_locs PROTO((dw_loc_descr_ref));
2448 static int constant_size PROTO((long unsigned));
2449 static unsigned long size_of_die PROTO((dw_die_ref));
2450 static void calc_die_sizes PROTO((dw_die_ref));
2451 static unsigned long size_of_line_prolog PROTO((void));
2452 static unsigned long size_of_line_info PROTO((void));
2453 static unsigned long size_of_pubnames PROTO((void));
2454 static unsigned long size_of_aranges PROTO((void));
2455 static enum dwarf_form value_format PROTO((dw_val_ref));
2456 static void output_value_format PROTO((dw_val_ref));
2457 static void output_abbrev_section PROTO((void));
2458 static void output_loc_operands PROTO((dw_loc_descr_ref));
2459 static unsigned long sibling_offset PROTO((dw_die_ref));
2460 static void output_die PROTO((dw_die_ref));
2461 static void output_compilation_unit_header PROTO((void));
2462 static char *dwarf2_name PROTO((tree, int));
2463 static void add_pubname PROTO((tree, dw_die_ref));
2464 static void output_pubnames PROTO((void));
2465 static void add_arange PROTO((tree, dw_die_ref));
2466 static void output_aranges PROTO((void));
2467 static void output_line_info PROTO((void));
2468 static int is_body_block PROTO((tree));
2469 static dw_die_ref base_type_die PROTO((tree));
2470 static tree root_type PROTO((tree));
2471 static int is_base_type PROTO((tree));
2472 static dw_die_ref modified_type_die PROTO((tree, int, int, dw_die_ref));
2473 static int type_is_enum PROTO((tree));
2474 static dw_loc_descr_ref reg_loc_descriptor PROTO((rtx));
2475 static dw_loc_descr_ref based_loc_descr PROTO((unsigned, long));
2476 static int is_based_loc PROTO((rtx));
2477 static dw_loc_descr_ref mem_loc_descriptor PROTO((rtx));
2478 static dw_loc_descr_ref concat_loc_descriptor PROTO((rtx, rtx));
2479 static dw_loc_descr_ref loc_descriptor PROTO((rtx));
2480 static unsigned ceiling PROTO((unsigned, unsigned));
2481 static tree field_type PROTO((tree));
2482 static unsigned simple_type_align_in_bits PROTO((tree));
2483 static unsigned simple_type_size_in_bits PROTO((tree));
2484 static unsigned field_byte_offset PROTO((tree));
2485 static void add_AT_location_description PROTO((dw_die_ref,
2486 enum dwarf_attribute, rtx));
2487 static void add_data_member_location_attribute PROTO((dw_die_ref, tree));
2488 static void add_const_value_attribute PROTO((dw_die_ref, rtx));
2489 static void add_location_or_const_value_attribute PROTO((dw_die_ref, tree));
2490 static void add_name_attribute PROTO((dw_die_ref, char *));
2491 static void add_bound_info PROTO((dw_die_ref,
2492 enum dwarf_attribute, tree));
2493 static void add_subscript_info PROTO((dw_die_ref, tree));
2494 static void add_byte_size_attribute PROTO((dw_die_ref, tree));
2495 static void add_bit_offset_attribute PROTO((dw_die_ref, tree));
2496 static void add_bit_size_attribute PROTO((dw_die_ref, tree));
2497 static void add_prototyped_attribute PROTO((dw_die_ref, tree));
2498 static void add_abstract_origin_attribute PROTO((dw_die_ref, tree));
2499 static void add_pure_or_virtual_attribute PROTO((dw_die_ref, tree));
2500 static void add_src_coords_attributes PROTO((dw_die_ref, tree));
2501 static void add_name_and_src_coords_attributes PROTO((dw_die_ref, tree));
2502 static void push_decl_scope PROTO((tree));
2503 static dw_die_ref scope_die_for PROTO((tree, dw_die_ref));
2504 static void pop_decl_scope PROTO((void));
2505 static void add_type_attribute PROTO((dw_die_ref, tree, int, int,
2507 static char *type_tag PROTO((tree));
2508 static tree member_declared_type PROTO((tree));
2510 static char *decl_start_label PROTO((tree));
2512 static void gen_array_type_die PROTO((tree, dw_die_ref));
2513 static void gen_set_type_die PROTO((tree, dw_die_ref));
2515 static void gen_entry_point_die PROTO((tree, dw_die_ref));
2517 static void pend_type PROTO((tree));
2518 static void output_pending_types_for_scope PROTO((dw_die_ref));
2519 static void gen_inlined_enumeration_type_die PROTO((tree, dw_die_ref));
2520 static void gen_inlined_structure_type_die PROTO((tree, dw_die_ref));
2521 static void gen_inlined_union_type_die PROTO((tree, dw_die_ref));
2522 static void gen_enumeration_type_die PROTO((tree, dw_die_ref));
2523 static dw_die_ref gen_formal_parameter_die PROTO((tree, dw_die_ref));
2524 static void gen_unspecified_parameters_die PROTO((tree, dw_die_ref));
2525 static void gen_formal_types_die PROTO((tree, dw_die_ref));
2526 static void gen_subprogram_die PROTO((tree, dw_die_ref));
2527 static void gen_variable_die PROTO((tree, dw_die_ref));
2528 static void gen_label_die PROTO((tree, dw_die_ref));
2529 static void gen_lexical_block_die PROTO((tree, dw_die_ref, int));
2530 static void gen_inlined_subroutine_die PROTO((tree, dw_die_ref, int));
2531 static void gen_field_die PROTO((tree, dw_die_ref));
2532 static void gen_ptr_to_mbr_type_die PROTO((tree, dw_die_ref));
2533 static void gen_compile_unit_die PROTO((char *));
2534 static void gen_string_type_die PROTO((tree, dw_die_ref));
2535 static void gen_inheritance_die PROTO((tree, dw_die_ref));
2536 static void gen_member_die PROTO((tree, dw_die_ref));
2537 static void gen_struct_or_union_type_die PROTO((tree, dw_die_ref));
2538 static void gen_subroutine_type_die PROTO((tree, dw_die_ref));
2539 static void gen_typedef_die PROTO((tree, dw_die_ref));
2540 static void gen_type_die PROTO((tree, dw_die_ref));
2541 static void gen_tagged_type_instantiation_die PROTO((tree, dw_die_ref));
2542 static void gen_block_die PROTO((tree, dw_die_ref, int));
2543 static void decls_for_scope PROTO((tree, dw_die_ref, int));
2544 static int is_redundant_typedef PROTO((tree));
2545 static void gen_decl_die PROTO((tree, dw_die_ref));
2546 static unsigned lookup_filename PROTO((char *));
2548 /* Section names used to hold DWARF debugging information. */
2549 #ifndef DEBUG_INFO_SECTION
2550 #define DEBUG_INFO_SECTION ".debug_info"
2552 #ifndef ABBREV_SECTION
2553 #define ABBREV_SECTION ".debug_abbrev"
2555 #ifndef ARANGES_SECTION
2556 #define ARANGES_SECTION ".debug_aranges"
2558 #ifndef DW_MACINFO_SECTION
2559 #define DW_MACINFO_SECTION ".debug_macinfo"
2561 #ifndef DEBUG_LINE_SECTION
2562 #define DEBUG_LINE_SECTION ".debug_line"
2565 #define LOC_SECTION ".debug_loc"
2567 #ifndef PUBNAMES_SECTION
2568 #define PUBNAMES_SECTION ".debug_pubnames"
2571 #define STR_SECTION ".debug_str"
2574 /* Standard ELF section names for compiled code and data. */
2575 #ifndef TEXT_SECTION
2576 #define TEXT_SECTION ".text"
2578 #ifndef DATA_SECTION
2579 #define DATA_SECTION ".data"
2582 #define BSS_SECTION ".bss"
2586 /* Definitions of defaults for formats and names of various special
2587 (artificial) labels which may be generated within this file (when the -g
2588 options is used and DWARF_DEBUGGING_INFO is in effect.
2589 If necessary, these may be overridden from within the tm.h file, but
2590 typically, overriding these defaults is unnecessary. */
2592 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
2594 #ifndef TEXT_END_LABEL
2595 #define TEXT_END_LABEL "Letext"
2597 #ifndef DATA_END_LABEL
2598 #define DATA_END_LABEL "Ledata"
2600 #ifndef BSS_END_LABEL
2601 #define BSS_END_LABEL "Lebss"
2603 #ifndef INSN_LABEL_FMT
2604 #define INSN_LABEL_FMT "LI%u_"
2606 #ifndef BLOCK_BEGIN_LABEL
2607 #define BLOCK_BEGIN_LABEL "LBB"
2609 #ifndef BLOCK_END_LABEL
2610 #define BLOCK_END_LABEL "LBE"
2612 #ifndef BODY_BEGIN_LABEL
2613 #define BODY_BEGIN_LABEL "Lbb"
2615 #ifndef BODY_END_LABEL
2616 #define BODY_END_LABEL "Lbe"
2618 #ifndef LINE_CODE_LABEL
2619 #define LINE_CODE_LABEL "LM"
2621 #ifndef SEPARATE_LINE_CODE_LABEL
2622 #define SEPARATE_LINE_CODE_LABEL "LSM"
2625 /* Convert a reference to the assembler name of a C-level name. This
2626 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2627 a string rather than writing to a file. */
2628 #ifndef ASM_NAME_TO_STRING
2629 #define ASM_NAME_TO_STRING(STR, NAME) \
2631 if ((NAME)[0] == '*') \
2632 strcpy (STR, NAME+1); \
2634 strcpy (STR, NAME); \
2639 /* Convert an integer constant expression into assembler syntax. Addition
2640 and subtraction are the only arithmetic that may appear in these
2641 expressions. This is an adaptation of output_addr_const in final.c.
2642 Here, the target of the conversion is a string buffer. We can't use
2643 output_addr_const directly, because it writes to a file. */
2646 addr_const_to_string (str, x)
2655 switch (GET_CODE (x))
2665 ASM_NAME_TO_STRING (buf1, XSTR (x, 0));
2670 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (XEXP (x, 0)));
2671 ASM_NAME_TO_STRING (buf2, buf1);
2676 ASM_GENERATE_INTERNAL_LABEL (buf1, "L", CODE_LABEL_NUMBER (x));
2677 ASM_NAME_TO_STRING (buf2, buf1);
2682 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC, INTVAL (x));
2687 /* This used to output parentheses around the expression, but that does
2688 not work on the 386 (either ATT or BSD assembler). */
2689 addr_const_to_string (buf1, XEXP (x, 0));
2694 if (GET_MODE (x) == VOIDmode)
2696 /* We can use %d if the number is one word and positive. */
2697 if (CONST_DOUBLE_HIGH (x))
2698 sprintf (buf1, HOST_WIDE_INT_PRINT_DOUBLE_HEX,
2699 CONST_DOUBLE_HIGH (x), CONST_DOUBLE_LOW (x));
2700 else if (CONST_DOUBLE_LOW (x) < 0)
2701 sprintf (buf1, HOST_WIDE_INT_PRINT_HEX, CONST_DOUBLE_LOW (x));
2703 sprintf (buf1, HOST_WIDE_INT_PRINT_DEC,
2704 CONST_DOUBLE_LOW (x));
2708 /* We can't handle floating point constants; PRINT_OPERAND must
2710 output_operand_lossage ("floating constant misused");
2714 /* Some assemblers need integer constants to appear last (eg masm). */
2715 if (GET_CODE (XEXP (x, 0)) == CONST_INT)
2717 addr_const_to_string (buf1, XEXP (x, 1));
2719 if (INTVAL (XEXP (x, 0)) >= 0)
2722 addr_const_to_string (buf1, XEXP (x, 0));
2727 addr_const_to_string (buf1, XEXP (x, 0));
2729 if (INTVAL (XEXP (x, 1)) >= 0)
2732 addr_const_to_string (buf1, XEXP (x, 1));
2738 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2739 can't handle that. */
2740 x = simplify_subtraction (x);
2741 if (GET_CODE (x) != MINUS)
2744 addr_const_to_string (buf1, XEXP (x, 0));
2747 if (GET_CODE (XEXP (x, 1)) == CONST_INT
2748 && INTVAL (XEXP (x, 1)) < 0)
2750 strcat (str, ASM_OPEN_PAREN);
2751 addr_const_to_string (buf1, XEXP (x, 1));
2753 strcat (str, ASM_CLOSE_PAREN);
2757 addr_const_to_string (buf1, XEXP (x, 1));
2764 addr_const_to_string (buf1, XEXP (x, 0));
2769 output_operand_lossage ("invalid expression as operand");
2773 /* Convert an address constant to a string, and return a pointer to
2774 a copy of the result, located on the heap. */
2781 addr_const_to_string (buf, x);
2782 return xstrdup (buf);
2785 /* Test if rtl node points to a pseudo register. */
2791 return (((GET_CODE (rtl) == REG) && (REGNO (rtl) >= FIRST_PSEUDO_REGISTER))
2792 || ((GET_CODE (rtl) == SUBREG)
2793 && (REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER)));
2796 /* Return a reference to a type, with its const and volatile qualifiers
2800 type_main_variant (type)
2803 type = TYPE_MAIN_VARIANT (type);
2805 /* There really should be only one main variant among any group of variants
2806 of a given type (and all of the MAIN_VARIANT values for all members of
2807 the group should point to that one type) but sometimes the C front-end
2808 messes this up for array types, so we work around that bug here. */
2810 if (TREE_CODE (type) == ARRAY_TYPE)
2811 while (type != TYPE_MAIN_VARIANT (type))
2812 type = TYPE_MAIN_VARIANT (type);
2817 /* Return non-zero if the given type node represents a tagged type. */
2820 is_tagged_type (type)
2823 register enum tree_code code = TREE_CODE (type);
2825 return (code == RECORD_TYPE || code == UNION_TYPE
2826 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
2829 /* Convert a DIE tag into its string name. */
2832 dwarf_tag_name (tag)
2833 register unsigned tag;
2837 case DW_TAG_padding:
2838 return "DW_TAG_padding";
2839 case DW_TAG_array_type:
2840 return "DW_TAG_array_type";
2841 case DW_TAG_class_type:
2842 return "DW_TAG_class_type";
2843 case DW_TAG_entry_point:
2844 return "DW_TAG_entry_point";
2845 case DW_TAG_enumeration_type:
2846 return "DW_TAG_enumeration_type";
2847 case DW_TAG_formal_parameter:
2848 return "DW_TAG_formal_parameter";
2849 case DW_TAG_imported_declaration:
2850 return "DW_TAG_imported_declaration";
2852 return "DW_TAG_label";
2853 case DW_TAG_lexical_block:
2854 return "DW_TAG_lexical_block";
2856 return "DW_TAG_member";
2857 case DW_TAG_pointer_type:
2858 return "DW_TAG_pointer_type";
2859 case DW_TAG_reference_type:
2860 return "DW_TAG_reference_type";
2861 case DW_TAG_compile_unit:
2862 return "DW_TAG_compile_unit";
2863 case DW_TAG_string_type:
2864 return "DW_TAG_string_type";
2865 case DW_TAG_structure_type:
2866 return "DW_TAG_structure_type";
2867 case DW_TAG_subroutine_type:
2868 return "DW_TAG_subroutine_type";
2869 case DW_TAG_typedef:
2870 return "DW_TAG_typedef";
2871 case DW_TAG_union_type:
2872 return "DW_TAG_union_type";
2873 case DW_TAG_unspecified_parameters:
2874 return "DW_TAG_unspecified_parameters";
2875 case DW_TAG_variant:
2876 return "DW_TAG_variant";
2877 case DW_TAG_common_block:
2878 return "DW_TAG_common_block";
2879 case DW_TAG_common_inclusion:
2880 return "DW_TAG_common_inclusion";
2881 case DW_TAG_inheritance:
2882 return "DW_TAG_inheritance";
2883 case DW_TAG_inlined_subroutine:
2884 return "DW_TAG_inlined_subroutine";
2886 return "DW_TAG_module";
2887 case DW_TAG_ptr_to_member_type:
2888 return "DW_TAG_ptr_to_member_type";
2889 case DW_TAG_set_type:
2890 return "DW_TAG_set_type";
2891 case DW_TAG_subrange_type:
2892 return "DW_TAG_subrange_type";
2893 case DW_TAG_with_stmt:
2894 return "DW_TAG_with_stmt";
2895 case DW_TAG_access_declaration:
2896 return "DW_TAG_access_declaration";
2897 case DW_TAG_base_type:
2898 return "DW_TAG_base_type";
2899 case DW_TAG_catch_block:
2900 return "DW_TAG_catch_block";
2901 case DW_TAG_const_type:
2902 return "DW_TAG_const_type";
2903 case DW_TAG_constant:
2904 return "DW_TAG_constant";
2905 case DW_TAG_enumerator:
2906 return "DW_TAG_enumerator";
2907 case DW_TAG_file_type:
2908 return "DW_TAG_file_type";
2910 return "DW_TAG_friend";
2911 case DW_TAG_namelist:
2912 return "DW_TAG_namelist";
2913 case DW_TAG_namelist_item:
2914 return "DW_TAG_namelist_item";
2915 case DW_TAG_packed_type:
2916 return "DW_TAG_packed_type";
2917 case DW_TAG_subprogram:
2918 return "DW_TAG_subprogram";
2919 case DW_TAG_template_type_param:
2920 return "DW_TAG_template_type_param";
2921 case DW_TAG_template_value_param:
2922 return "DW_TAG_template_value_param";
2923 case DW_TAG_thrown_type:
2924 return "DW_TAG_thrown_type";
2925 case DW_TAG_try_block:
2926 return "DW_TAG_try_block";
2927 case DW_TAG_variant_part:
2928 return "DW_TAG_variant_part";
2929 case DW_TAG_variable:
2930 return "DW_TAG_variable";
2931 case DW_TAG_volatile_type:
2932 return "DW_TAG_volatile_type";
2933 case DW_TAG_MIPS_loop:
2934 return "DW_TAG_MIPS_loop";
2935 case DW_TAG_format_label:
2936 return "DW_TAG_format_label";
2937 case DW_TAG_function_template:
2938 return "DW_TAG_function_template";
2939 case DW_TAG_class_template:
2940 return "DW_TAG_class_template";
2942 return "DW_TAG_<unknown>";
2946 /* Convert a DWARF attribute code into its string name. */
2949 dwarf_attr_name (attr)
2950 register unsigned attr;
2955 return "DW_AT_sibling";
2956 case DW_AT_location:
2957 return "DW_AT_location";
2959 return "DW_AT_name";
2960 case DW_AT_ordering:
2961 return "DW_AT_ordering";
2962 case DW_AT_subscr_data:
2963 return "DW_AT_subscr_data";
2964 case DW_AT_byte_size:
2965 return "DW_AT_byte_size";
2966 case DW_AT_bit_offset:
2967 return "DW_AT_bit_offset";
2968 case DW_AT_bit_size:
2969 return "DW_AT_bit_size";
2970 case DW_AT_element_list:
2971 return "DW_AT_element_list";
2972 case DW_AT_stmt_list:
2973 return "DW_AT_stmt_list";
2975 return "DW_AT_low_pc";
2977 return "DW_AT_high_pc";
2978 case DW_AT_language:
2979 return "DW_AT_language";
2981 return "DW_AT_member";
2983 return "DW_AT_discr";
2984 case DW_AT_discr_value:
2985 return "DW_AT_discr_value";
2986 case DW_AT_visibility:
2987 return "DW_AT_visibility";
2989 return "DW_AT_import";
2990 case DW_AT_string_length:
2991 return "DW_AT_string_length";
2992 case DW_AT_common_reference:
2993 return "DW_AT_common_reference";
2994 case DW_AT_comp_dir:
2995 return "DW_AT_comp_dir";
2996 case DW_AT_const_value:
2997 return "DW_AT_const_value";
2998 case DW_AT_containing_type:
2999 return "DW_AT_containing_type";
3000 case DW_AT_default_value:
3001 return "DW_AT_default_value";
3003 return "DW_AT_inline";
3004 case DW_AT_is_optional:
3005 return "DW_AT_is_optional";
3006 case DW_AT_lower_bound:
3007 return "DW_AT_lower_bound";
3008 case DW_AT_producer:
3009 return "DW_AT_producer";
3010 case DW_AT_prototyped:
3011 return "DW_AT_prototyped";
3012 case DW_AT_return_addr:
3013 return "DW_AT_return_addr";
3014 case DW_AT_start_scope:
3015 return "DW_AT_start_scope";
3016 case DW_AT_stride_size:
3017 return "DW_AT_stride_size";
3018 case DW_AT_upper_bound:
3019 return "DW_AT_upper_bound";
3020 case DW_AT_abstract_origin:
3021 return "DW_AT_abstract_origin";
3022 case DW_AT_accessibility:
3023 return "DW_AT_accessibility";
3024 case DW_AT_address_class:
3025 return "DW_AT_address_class";
3026 case DW_AT_artificial:
3027 return "DW_AT_artificial";
3028 case DW_AT_base_types:
3029 return "DW_AT_base_types";
3030 case DW_AT_calling_convention:
3031 return "DW_AT_calling_convention";
3033 return "DW_AT_count";
3034 case DW_AT_data_member_location:
3035 return "DW_AT_data_member_location";
3036 case DW_AT_decl_column:
3037 return "DW_AT_decl_column";
3038 case DW_AT_decl_file:
3039 return "DW_AT_decl_file";
3040 case DW_AT_decl_line:
3041 return "DW_AT_decl_line";
3042 case DW_AT_declaration:
3043 return "DW_AT_declaration";
3044 case DW_AT_discr_list:
3045 return "DW_AT_discr_list";
3046 case DW_AT_encoding:
3047 return "DW_AT_encoding";
3048 case DW_AT_external:
3049 return "DW_AT_external";
3050 case DW_AT_frame_base:
3051 return "DW_AT_frame_base";
3053 return "DW_AT_friend";
3054 case DW_AT_identifier_case:
3055 return "DW_AT_identifier_case";
3056 case DW_AT_macro_info:
3057 return "DW_AT_macro_info";
3058 case DW_AT_namelist_items:
3059 return "DW_AT_namelist_items";
3060 case DW_AT_priority:
3061 return "DW_AT_priority";
3063 return "DW_AT_segment";
3064 case DW_AT_specification:
3065 return "DW_AT_specification";
3066 case DW_AT_static_link:
3067 return "DW_AT_static_link";
3069 return "DW_AT_type";
3070 case DW_AT_use_location:
3071 return "DW_AT_use_location";
3072 case DW_AT_variable_parameter:
3073 return "DW_AT_variable_parameter";
3074 case DW_AT_virtuality:
3075 return "DW_AT_virtuality";
3076 case DW_AT_vtable_elem_location:
3077 return "DW_AT_vtable_elem_location";
3079 case DW_AT_MIPS_fde:
3080 return "DW_AT_MIPS_fde";
3081 case DW_AT_MIPS_loop_begin:
3082 return "DW_AT_MIPS_loop_begin";
3083 case DW_AT_MIPS_tail_loop_begin:
3084 return "DW_AT_MIPS_tail_loop_begin";
3085 case DW_AT_MIPS_epilog_begin:
3086 return "DW_AT_MIPS_epilog_begin";
3087 case DW_AT_MIPS_loop_unroll_factor:
3088 return "DW_AT_MIPS_loop_unroll_factor";
3089 case DW_AT_MIPS_software_pipeline_depth:
3090 return "DW_AT_MIPS_software_pipeline_depth";
3091 case DW_AT_MIPS_linkage_name:
3092 return "DW_AT_MIPS_linkage_name";
3093 case DW_AT_MIPS_stride:
3094 return "DW_AT_MIPS_stride";
3095 case DW_AT_MIPS_abstract_name:
3096 return "DW_AT_MIPS_abstract_name";
3097 case DW_AT_MIPS_clone_origin:
3098 return "DW_AT_MIPS_clone_origin";
3099 case DW_AT_MIPS_has_inlines:
3100 return "DW_AT_MIPS_has_inlines";
3102 case DW_AT_sf_names:
3103 return "DW_AT_sf_names";
3104 case DW_AT_src_info:
3105 return "DW_AT_src_info";
3106 case DW_AT_mac_info:
3107 return "DW_AT_mac_info";
3108 case DW_AT_src_coords:
3109 return "DW_AT_src_coords";
3110 case DW_AT_body_begin:
3111 return "DW_AT_body_begin";
3112 case DW_AT_body_end:
3113 return "DW_AT_body_end";
3115 return "DW_AT_<unknown>";
3119 /* Convert a DWARF value form code into its string name. */
3122 dwarf_form_name (form)
3123 register unsigned form;
3128 return "DW_FORM_addr";
3129 case DW_FORM_block2:
3130 return "DW_FORM_block2";
3131 case DW_FORM_block4:
3132 return "DW_FORM_block4";
3134 return "DW_FORM_data2";
3136 return "DW_FORM_data4";
3138 return "DW_FORM_data8";
3139 case DW_FORM_string:
3140 return "DW_FORM_string";
3142 return "DW_FORM_block";
3143 case DW_FORM_block1:
3144 return "DW_FORM_block1";
3146 return "DW_FORM_data1";
3148 return "DW_FORM_flag";
3150 return "DW_FORM_sdata";
3152 return "DW_FORM_strp";
3154 return "DW_FORM_udata";
3155 case DW_FORM_ref_addr:
3156 return "DW_FORM_ref_addr";
3158 return "DW_FORM_ref1";
3160 return "DW_FORM_ref2";
3162 return "DW_FORM_ref4";
3164 return "DW_FORM_ref8";
3165 case DW_FORM_ref_udata:
3166 return "DW_FORM_ref_udata";
3167 case DW_FORM_indirect:
3168 return "DW_FORM_indirect";
3170 return "DW_FORM_<unknown>";
3174 /* Convert a DWARF stack opcode into its string name. */
3177 dwarf_stack_op_name (op)
3178 register unsigned op;
3183 return "DW_OP_addr";
3185 return "DW_OP_deref";
3187 return "DW_OP_const1u";
3189 return "DW_OP_const1s";
3191 return "DW_OP_const2u";
3193 return "DW_OP_const2s";
3195 return "DW_OP_const4u";
3197 return "DW_OP_const4s";
3199 return "DW_OP_const8u";
3201 return "DW_OP_const8s";
3203 return "DW_OP_constu";
3205 return "DW_OP_consts";
3209 return "DW_OP_drop";
3211 return "DW_OP_over";
3213 return "DW_OP_pick";
3215 return "DW_OP_swap";
3219 return "DW_OP_xderef";
3227 return "DW_OP_minus";
3239 return "DW_OP_plus";
3240 case DW_OP_plus_uconst:
3241 return "DW_OP_plus_uconst";
3247 return "DW_OP_shra";
3265 return "DW_OP_skip";
3267 return "DW_OP_lit0";
3269 return "DW_OP_lit1";
3271 return "DW_OP_lit2";
3273 return "DW_OP_lit3";
3275 return "DW_OP_lit4";
3277 return "DW_OP_lit5";
3279 return "DW_OP_lit6";
3281 return "DW_OP_lit7";
3283 return "DW_OP_lit8";
3285 return "DW_OP_lit9";
3287 return "DW_OP_lit10";
3289 return "DW_OP_lit11";
3291 return "DW_OP_lit12";
3293 return "DW_OP_lit13";
3295 return "DW_OP_lit14";
3297 return "DW_OP_lit15";
3299 return "DW_OP_lit16";
3301 return "DW_OP_lit17";
3303 return "DW_OP_lit18";
3305 return "DW_OP_lit19";
3307 return "DW_OP_lit20";
3309 return "DW_OP_lit21";
3311 return "DW_OP_lit22";
3313 return "DW_OP_lit23";
3315 return "DW_OP_lit24";
3317 return "DW_OP_lit25";
3319 return "DW_OP_lit26";
3321 return "DW_OP_lit27";
3323 return "DW_OP_lit28";
3325 return "DW_OP_lit29";
3327 return "DW_OP_lit30";
3329 return "DW_OP_lit31";
3331 return "DW_OP_reg0";
3333 return "DW_OP_reg1";
3335 return "DW_OP_reg2";
3337 return "DW_OP_reg3";
3339 return "DW_OP_reg4";
3341 return "DW_OP_reg5";
3343 return "DW_OP_reg6";
3345 return "DW_OP_reg7";
3347 return "DW_OP_reg8";
3349 return "DW_OP_reg9";
3351 return "DW_OP_reg10";
3353 return "DW_OP_reg11";
3355 return "DW_OP_reg12";
3357 return "DW_OP_reg13";
3359 return "DW_OP_reg14";
3361 return "DW_OP_reg15";
3363 return "DW_OP_reg16";
3365 return "DW_OP_reg17";
3367 return "DW_OP_reg18";
3369 return "DW_OP_reg19";
3371 return "DW_OP_reg20";
3373 return "DW_OP_reg21";
3375 return "DW_OP_reg22";
3377 return "DW_OP_reg23";
3379 return "DW_OP_reg24";
3381 return "DW_OP_reg25";
3383 return "DW_OP_reg26";
3385 return "DW_OP_reg27";
3387 return "DW_OP_reg28";
3389 return "DW_OP_reg29";
3391 return "DW_OP_reg30";
3393 return "DW_OP_reg31";
3395 return "DW_OP_breg0";
3397 return "DW_OP_breg1";
3399 return "DW_OP_breg2";
3401 return "DW_OP_breg3";
3403 return "DW_OP_breg4";
3405 return "DW_OP_breg5";
3407 return "DW_OP_breg6";
3409 return "DW_OP_breg7";
3411 return "DW_OP_breg8";
3413 return "DW_OP_breg9";
3415 return "DW_OP_breg10";
3417 return "DW_OP_breg11";
3419 return "DW_OP_breg12";
3421 return "DW_OP_breg13";
3423 return "DW_OP_breg14";
3425 return "DW_OP_breg15";
3427 return "DW_OP_breg16";
3429 return "DW_OP_breg17";
3431 return "DW_OP_breg18";
3433 return "DW_OP_breg19";
3435 return "DW_OP_breg20";
3437 return "DW_OP_breg21";
3439 return "DW_OP_breg22";
3441 return "DW_OP_breg23";
3443 return "DW_OP_breg24";
3445 return "DW_OP_breg25";
3447 return "DW_OP_breg26";
3449 return "DW_OP_breg27";
3451 return "DW_OP_breg28";
3453 return "DW_OP_breg29";
3455 return "DW_OP_breg30";
3457 return "DW_OP_breg31";
3459 return "DW_OP_regx";
3461 return "DW_OP_fbreg";
3463 return "DW_OP_bregx";
3465 return "DW_OP_piece";
3466 case DW_OP_deref_size:
3467 return "DW_OP_deref_size";
3468 case DW_OP_xderef_size:
3469 return "DW_OP_xderef_size";
3473 return "OP_<unknown>";
3477 /* Convert a DWARF type code into its string name. */
3481 dwarf_type_encoding_name (enc)
3482 register unsigned enc;
3486 case DW_ATE_address:
3487 return "DW_ATE_address";
3488 case DW_ATE_boolean:
3489 return "DW_ATE_boolean";
3490 case DW_ATE_complex_float:
3491 return "DW_ATE_complex_float";
3493 return "DW_ATE_float";
3495 return "DW_ATE_signed";
3496 case DW_ATE_signed_char:
3497 return "DW_ATE_signed_char";
3498 case DW_ATE_unsigned:
3499 return "DW_ATE_unsigned";
3500 case DW_ATE_unsigned_char:
3501 return "DW_ATE_unsigned_char";
3503 return "DW_ATE_<unknown>";
3508 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3509 instance of an inlined instance of a decl which is local to an inline
3510 function, so we have to trace all of the way back through the origin chain
3511 to find out what sort of node actually served as the original seed for the
3515 decl_ultimate_origin (decl)
3518 register tree immediate_origin = DECL_ABSTRACT_ORIGIN (decl);
3520 if (immediate_origin == NULL_TREE)
3524 register tree ret_val;
3525 register tree lookahead = immediate_origin;
3529 ret_val = lookahead;
3530 lookahead = DECL_ABSTRACT_ORIGIN (ret_val);
3532 while (lookahead != NULL && lookahead != ret_val);
3538 /* Determine the "ultimate origin" of a block. The block may be an inlined
3539 instance of an inlined instance of a block which is local to an inline
3540 function, so we have to trace all of the way back through the origin chain
3541 to find out what sort of node actually served as the original seed for the
3545 block_ultimate_origin (block)
3546 register tree block;
3548 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
3550 if (immediate_origin == NULL_TREE)
3554 register tree ret_val;
3555 register tree lookahead = immediate_origin;
3559 ret_val = lookahead;
3560 lookahead = (TREE_CODE (ret_val) == BLOCK)
3561 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
3564 while (lookahead != NULL && lookahead != ret_val);
3570 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3571 of a virtual function may refer to a base class, so we check the 'this'
3575 decl_class_context (decl)
3578 tree context = NULL_TREE;
3580 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
3581 context = DECL_CONTEXT (decl);
3583 context = TYPE_MAIN_VARIANT
3584 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
3586 if (context && TREE_CODE_CLASS (TREE_CODE (context)) != 't')
3587 context = NULL_TREE;
3592 /* Add an attribute/value pair to a DIE */
3595 add_dwarf_attr (die, attr)
3596 register dw_die_ref die;
3597 register dw_attr_ref attr;
3599 if (die != NULL && attr != NULL)
3601 if (die->die_attr == NULL)
3603 die->die_attr = attr;
3604 die->die_attr_last = attr;
3608 die->die_attr_last->dw_attr_next = attr;
3609 die->die_attr_last = attr;
3614 /* Add a flag value attribute to a DIE. */
3617 add_AT_flag (die, attr_kind, flag)
3618 register dw_die_ref die;
3619 register enum dwarf_attribute attr_kind;
3620 register unsigned flag;
3622 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3624 attr->dw_attr_next = NULL;
3625 attr->dw_attr = attr_kind;
3626 attr->dw_attr_val.val_class = dw_val_class_flag;
3627 attr->dw_attr_val.v.val_flag = flag;
3628 add_dwarf_attr (die, attr);
3631 /* Add a signed integer attribute value to a DIE. */
3634 add_AT_int (die, attr_kind, int_val)
3635 register dw_die_ref die;
3636 register enum dwarf_attribute attr_kind;
3637 register long int int_val;
3639 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3641 attr->dw_attr_next = NULL;
3642 attr->dw_attr = attr_kind;
3643 attr->dw_attr_val.val_class = dw_val_class_const;
3644 attr->dw_attr_val.v.val_int = int_val;
3645 add_dwarf_attr (die, attr);
3648 /* Add an unsigned integer attribute value to a DIE. */
3651 add_AT_unsigned (die, attr_kind, unsigned_val)
3652 register dw_die_ref die;
3653 register enum dwarf_attribute attr_kind;
3654 register unsigned long unsigned_val;
3656 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3658 attr->dw_attr_next = NULL;
3659 attr->dw_attr = attr_kind;
3660 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
3661 attr->dw_attr_val.v.val_unsigned = unsigned_val;
3662 add_dwarf_attr (die, attr);
3665 /* Add an unsigned double integer attribute value to a DIE. */
3668 add_AT_long_long (die, attr_kind, val_hi, val_low)
3669 register dw_die_ref die;
3670 register enum dwarf_attribute attr_kind;
3671 register unsigned long val_hi;
3672 register unsigned long val_low;
3674 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3676 attr->dw_attr_next = NULL;
3677 attr->dw_attr = attr_kind;
3678 attr->dw_attr_val.val_class = dw_val_class_long_long;
3679 attr->dw_attr_val.v.val_long_long.hi = val_hi;
3680 attr->dw_attr_val.v.val_long_long.low = val_low;
3681 add_dwarf_attr (die, attr);
3684 /* Add a floating point attribute value to a DIE and return it. */
3687 add_AT_float (die, attr_kind, length, array)
3688 register dw_die_ref die;
3689 register enum dwarf_attribute attr_kind;
3690 register unsigned length;
3691 register long *array;
3693 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3695 attr->dw_attr_next = NULL;
3696 attr->dw_attr = attr_kind;
3697 attr->dw_attr_val.val_class = dw_val_class_float;
3698 attr->dw_attr_val.v.val_float.length = length;
3699 attr->dw_attr_val.v.val_float.array = array;
3700 add_dwarf_attr (die, attr);
3703 /* Add a string attribute value to a DIE. */
3706 add_AT_string (die, attr_kind, str)
3707 register dw_die_ref die;
3708 register enum dwarf_attribute attr_kind;
3711 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3713 attr->dw_attr_next = NULL;
3714 attr->dw_attr = attr_kind;
3715 attr->dw_attr_val.val_class = dw_val_class_str;
3716 attr->dw_attr_val.v.val_str = xstrdup (str);
3717 add_dwarf_attr (die, attr);
3720 /* Add a DIE reference attribute value to a DIE. */
3723 add_AT_die_ref (die, attr_kind, targ_die)
3724 register dw_die_ref die;
3725 register enum dwarf_attribute attr_kind;
3726 register dw_die_ref targ_die;
3728 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3730 attr->dw_attr_next = NULL;
3731 attr->dw_attr = attr_kind;
3732 attr->dw_attr_val.val_class = dw_val_class_die_ref;
3733 attr->dw_attr_val.v.val_die_ref = targ_die;
3734 add_dwarf_attr (die, attr);
3737 /* Add an FDE reference attribute value to a DIE. */
3740 add_AT_fde_ref (die, attr_kind, targ_fde)
3741 register dw_die_ref die;
3742 register enum dwarf_attribute attr_kind;
3743 register unsigned targ_fde;
3745 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3747 attr->dw_attr_next = NULL;
3748 attr->dw_attr = attr_kind;
3749 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
3750 attr->dw_attr_val.v.val_fde_index = targ_fde;
3751 add_dwarf_attr (die, attr);
3754 /* Add a location description attribute value to a DIE. */
3757 add_AT_loc (die, attr_kind, loc)
3758 register dw_die_ref die;
3759 register enum dwarf_attribute attr_kind;
3760 register dw_loc_descr_ref loc;
3762 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3764 attr->dw_attr_next = NULL;
3765 attr->dw_attr = attr_kind;
3766 attr->dw_attr_val.val_class = dw_val_class_loc;
3767 attr->dw_attr_val.v.val_loc = loc;
3768 add_dwarf_attr (die, attr);
3771 /* Add an address constant attribute value to a DIE. */
3774 add_AT_addr (die, attr_kind, addr)
3775 register dw_die_ref die;
3776 register enum dwarf_attribute attr_kind;
3779 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3781 attr->dw_attr_next = NULL;
3782 attr->dw_attr = attr_kind;
3783 attr->dw_attr_val.val_class = dw_val_class_addr;
3784 attr->dw_attr_val.v.val_addr = addr;
3785 add_dwarf_attr (die, attr);
3788 /* Add a label identifier attribute value to a DIE. */
3791 add_AT_lbl_id (die, attr_kind, lbl_id)
3792 register dw_die_ref die;
3793 register enum dwarf_attribute attr_kind;
3794 register char *lbl_id;
3796 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3798 attr->dw_attr_next = NULL;
3799 attr->dw_attr = attr_kind;
3800 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
3801 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
3802 add_dwarf_attr (die, attr);
3805 /* Add a section offset attribute value to a DIE. */
3808 add_AT_section_offset (die, attr_kind, section)
3809 register dw_die_ref die;
3810 register enum dwarf_attribute attr_kind;
3811 register char *section;
3813 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
3815 attr->dw_attr_next = NULL;
3816 attr->dw_attr = attr_kind;
3817 attr->dw_attr_val.val_class = dw_val_class_section_offset;
3818 attr->dw_attr_val.v.val_section = section;
3819 add_dwarf_attr (die, attr);
3823 /* Test if die refers to an external subroutine. */
3826 is_extern_subr_die (die)
3827 register dw_die_ref die;
3829 register dw_attr_ref a;
3830 register int is_subr = FALSE;
3831 register int is_extern = FALSE;
3833 if (die != NULL && die->die_tag == DW_TAG_subprogram)
3836 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3838 if (a->dw_attr == DW_AT_external
3839 && a->dw_attr_val.val_class == dw_val_class_flag
3840 && a->dw_attr_val.v.val_flag != 0)
3848 return is_subr && is_extern;
3851 /* Get the attribute of type attr_kind. */
3853 static inline dw_attr_ref
3854 get_AT (die, attr_kind)
3855 register dw_die_ref die;
3856 register enum dwarf_attribute attr_kind;
3858 register dw_attr_ref a;
3859 register dw_die_ref spec = NULL;
3863 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
3865 if (a->dw_attr == attr_kind)
3868 if (a->dw_attr == DW_AT_specification
3869 || a->dw_attr == DW_AT_abstract_origin)
3870 spec = a->dw_attr_val.v.val_die_ref;
3874 return get_AT (spec, attr_kind);
3880 /* Return the "low pc" attribute value, typically associated with
3881 a subprogram DIE. Return null if the "low pc" attribute is
3882 either not prsent, or if it cannot be represented as an
3883 assembler label identifier. */
3885 static inline char *
3887 register dw_die_ref die;
3889 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
3891 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3892 return a->dw_attr_val.v.val_lbl_id;
3897 /* Return the "high pc" attribute value, typically associated with
3898 a subprogram DIE. Return null if the "high pc" attribute is
3899 either not prsent, or if it cannot be represented as an
3900 assembler label identifier. */
3902 static inline char *
3904 register dw_die_ref die;
3906 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
3908 if (a && a->dw_attr_val.val_class == dw_val_class_lbl_id)
3909 return a->dw_attr_val.v.val_lbl_id;
3914 /* Return the value of the string attribute designated by ATTR_KIND, or
3915 NULL if it is not present. */
3917 static inline char *
3918 get_AT_string (die, attr_kind)
3919 register dw_die_ref die;
3920 register enum dwarf_attribute attr_kind;
3922 register dw_attr_ref a = get_AT (die, attr_kind);
3924 if (a && a->dw_attr_val.val_class == dw_val_class_str)
3925 return a->dw_attr_val.v.val_str;
3930 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3931 if it is not present. */
3934 get_AT_flag (die, attr_kind)
3935 register dw_die_ref die;
3936 register enum dwarf_attribute attr_kind;
3938 register dw_attr_ref a = get_AT (die, attr_kind);
3940 if (a && a->dw_attr_val.val_class == dw_val_class_flag)
3941 return a->dw_attr_val.v.val_flag;
3946 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3947 if it is not present. */
3949 static inline unsigned
3950 get_AT_unsigned (die, attr_kind)
3951 register dw_die_ref die;
3952 register enum dwarf_attribute attr_kind;
3954 register dw_attr_ref a = get_AT (die, attr_kind);
3956 if (a && a->dw_attr_val.val_class == dw_val_class_unsigned_const)
3957 return a->dw_attr_val.v.val_unsigned;
3965 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3967 return (lang == DW_LANG_C || lang == DW_LANG_C89
3968 || lang == DW_LANG_C_plus_plus);
3974 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
3976 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
3979 /* Remove the specified attribute if present. */
3982 remove_AT (die, attr_kind)
3983 register dw_die_ref die;
3984 register enum dwarf_attribute attr_kind;
3986 register dw_attr_ref a;
3987 register dw_attr_ref removed = NULL;;
3991 if (die->die_attr->dw_attr == attr_kind)
3993 removed = die->die_attr;
3994 if (die->die_attr_last == die->die_attr)
3995 die->die_attr_last = NULL;
3997 die->die_attr = die->die_attr->dw_attr_next;
4001 for (a = die->die_attr; a->dw_attr_next != NULL;
4002 a = a->dw_attr_next)
4003 if (a->dw_attr_next->dw_attr == attr_kind)
4005 removed = a->dw_attr_next;
4006 if (die->die_attr_last == a->dw_attr_next)
4007 die->die_attr_last = a;
4009 a->dw_attr_next = a->dw_attr_next->dw_attr_next;
4018 /* Discard the children of this DIE. */
4021 remove_children (die)
4022 register dw_die_ref die;
4024 register dw_die_ref child_die = die->die_child;
4026 die->die_child = NULL;
4027 die->die_child_last = NULL;
4029 while (child_die != NULL)
4031 register dw_die_ref tmp_die = child_die;
4032 register dw_attr_ref a;
4034 child_die = child_die->die_sib;
4036 for (a = tmp_die->die_attr; a != NULL; )
4038 register dw_attr_ref tmp_a = a;
4040 a = a->dw_attr_next;
4048 /* Add a child DIE below its parent. */
4051 add_child_die (die, child_die)
4052 register dw_die_ref die;
4053 register dw_die_ref child_die;
4055 if (die != NULL && child_die != NULL)
4057 if (die == child_die)
4059 child_die->die_parent = die;
4060 child_die->die_sib = NULL;
4062 if (die->die_child == NULL)
4064 die->die_child = child_die;
4065 die->die_child_last = child_die;
4069 die->die_child_last->die_sib = child_die;
4070 die->die_child_last = child_die;
4075 /* Return a pointer to a newly created DIE node. */
4077 static inline dw_die_ref
4078 new_die (tag_value, parent_die)
4079 register enum dwarf_tag tag_value;
4080 register dw_die_ref parent_die;
4082 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4084 die->die_tag = tag_value;
4085 die->die_abbrev = 0;
4086 die->die_offset = 0;
4087 die->die_child = NULL;
4088 die->die_parent = NULL;
4089 die->die_sib = NULL;
4090 die->die_child_last = NULL;
4091 die->die_attr = NULL;
4092 die->die_attr_last = NULL;
4094 if (parent_die != NULL)
4095 add_child_die (parent_die, die);
4098 limbo_die_node *limbo_node;
4100 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4101 limbo_node->die = die;
4102 limbo_node->next = limbo_die_list;
4103 limbo_die_list = limbo_node;
4109 /* Return the DIE associated with the given type specifier. */
4111 static inline dw_die_ref
4112 lookup_type_die (type)
4115 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4118 /* Equate a DIE to a given type specifier. */
4121 equate_type_number_to_die (type, type_die)
4123 register dw_die_ref type_die;
4125 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4128 /* Return the DIE associated with a given declaration. */
4130 static inline dw_die_ref
4131 lookup_decl_die (decl)
4134 register unsigned decl_id = DECL_UID (decl);
4136 return (decl_id < decl_die_table_in_use
4137 ? decl_die_table[decl_id] : NULL);
4140 /* Equate a DIE to a particular declaration. */
4143 equate_decl_number_to_die (decl, decl_die)
4145 register dw_die_ref decl_die;
4147 register unsigned decl_id = DECL_UID (decl);
4148 register unsigned num_allocated;
4150 if (decl_id >= decl_die_table_allocated)
4153 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4154 / DECL_DIE_TABLE_INCREMENT)
4155 * DECL_DIE_TABLE_INCREMENT;
4158 = (dw_die_ref *) xrealloc (decl_die_table,
4159 sizeof (dw_die_ref) * num_allocated);
4161 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4162 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4163 decl_die_table_allocated = num_allocated;
4166 if (decl_id >= decl_die_table_in_use)
4167 decl_die_table_in_use = (decl_id + 1);
4169 decl_die_table[decl_id] = decl_die;
4172 /* Return a pointer to a newly allocated location description. Location
4173 descriptions are simple expression terms that can be strung
4174 together to form more complicated location (address) descriptions. */
4176 static inline dw_loc_descr_ref
4177 new_loc_descr (op, oprnd1, oprnd2)
4178 register enum dwarf_location_atom op;
4179 register unsigned long oprnd1;
4180 register unsigned long oprnd2;
4182 register dw_loc_descr_ref descr
4183 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
4185 descr->dw_loc_next = NULL;
4186 descr->dw_loc_opc = op;
4187 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
4188 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
4189 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
4190 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
4195 /* Add a location description term to a location description expression. */
4198 add_loc_descr (list_head, descr)
4199 register dw_loc_descr_ref *list_head;
4200 register dw_loc_descr_ref descr;
4202 register dw_loc_descr_ref *d;
4204 /* Find the end of the chain. */
4205 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
4211 /* Keep track of the number of spaces used to indent the
4212 output of the debugging routines that print the structure of
4213 the DIE internal representation. */
4214 static int print_indent;
4216 /* Indent the line the number of spaces given by print_indent. */
4219 print_spaces (outfile)
4222 fprintf (outfile, "%*s", print_indent, "");
4225 /* Print the information associated with a given DIE, and its children.
4226 This routine is a debugging aid only. */
4229 print_die (die, outfile)
4233 register dw_attr_ref a;
4234 register dw_die_ref c;
4236 print_spaces (outfile);
4237 fprintf (outfile, "DIE %4lu: %s\n",
4238 die->die_offset, dwarf_tag_name (die->die_tag));
4239 print_spaces (outfile);
4240 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4241 fprintf (outfile, " offset: %lu\n", die->die_offset);
4243 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4245 print_spaces (outfile);
4246 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4248 switch (a->dw_attr_val.val_class)
4250 case dw_val_class_addr:
4251 fprintf (outfile, "address");
4253 case dw_val_class_loc:
4254 fprintf (outfile, "location descriptor");
4256 case dw_val_class_const:
4257 fprintf (outfile, "%ld", a->dw_attr_val.v.val_int);
4259 case dw_val_class_unsigned_const:
4260 fprintf (outfile, "%lu", a->dw_attr_val.v.val_unsigned);
4262 case dw_val_class_long_long:
4263 fprintf (outfile, "constant (%lu,%lu)",
4264 a->dw_attr_val.v.val_long_long.hi,
4265 a->dw_attr_val.v.val_long_long.low);
4267 case dw_val_class_float:
4268 fprintf (outfile, "floating-point constant");
4270 case dw_val_class_flag:
4271 fprintf (outfile, "%u", a->dw_attr_val.v.val_flag);
4273 case dw_val_class_die_ref:
4274 if (a->dw_attr_val.v.val_die_ref != NULL)
4275 fprintf (outfile, "die -> %lu",
4276 a->dw_attr_val.v.val_die_ref->die_offset);
4278 fprintf (outfile, "die -> <null>");
4280 case dw_val_class_lbl_id:
4281 fprintf (outfile, "label: %s", a->dw_attr_val.v.val_lbl_id);
4283 case dw_val_class_section_offset:
4284 fprintf (outfile, "section: %s", a->dw_attr_val.v.val_section);
4286 case dw_val_class_str:
4287 if (a->dw_attr_val.v.val_str != NULL)
4288 fprintf (outfile, "\"%s\"", a->dw_attr_val.v.val_str);
4290 fprintf (outfile, "<null>");
4296 fprintf (outfile, "\n");
4299 if (die->die_child != NULL)
4302 for (c = die->die_child; c != NULL; c = c->die_sib)
4303 print_die (c, outfile);
4309 /* Print the contents of the source code line number correspondence table.
4310 This routine is a debugging aid only. */
4313 print_dwarf_line_table (outfile)
4316 register unsigned i;
4317 register dw_line_info_ref line_info;
4319 fprintf (outfile, "\n\nDWARF source line information\n");
4320 for (i = 1; i < line_info_table_in_use; ++i)
4322 line_info = &line_info_table[i];
4323 fprintf (outfile, "%5d: ", i);
4324 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4325 fprintf (outfile, "%6ld", line_info->dw_line_num);
4326 fprintf (outfile, "\n");
4329 fprintf (outfile, "\n\n");
4332 /* Print the information collected for a given DIE. */
4335 debug_dwarf_die (die)
4338 print_die (die, stderr);
4341 /* Print all DWARF information collected for the compilation unit.
4342 This routine is a debugging aid only. */
4348 print_die (comp_unit_die, stderr);
4349 print_dwarf_line_table (stderr);
4352 /* Traverse the DIE, and add a sibling attribute if it may have the
4353 effect of speeding up access to siblings. To save some space,
4354 avoid generating sibling attributes for DIE's without children. */
4357 add_sibling_attributes(die)
4358 register dw_die_ref die;
4360 register dw_die_ref c;
4361 register dw_attr_ref attr;
4362 if (die != comp_unit_die && die->die_child != NULL)
4364 attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4365 attr->dw_attr_next = NULL;
4366 attr->dw_attr = DW_AT_sibling;
4367 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4368 attr->dw_attr_val.v.val_die_ref = die->die_sib;
4370 /* Add the sibling link to the front of the attribute list. */
4371 attr->dw_attr_next = die->die_attr;
4372 if (die->die_attr == NULL)
4373 die->die_attr_last = attr;
4375 die->die_attr = attr;
4378 for (c = die->die_child; c != NULL; c = c->die_sib)
4379 add_sibling_attributes (c);
4382 /* The format of each DIE (and its attribute value pairs)
4383 is encoded in an abbreviation table. This routine builds the
4384 abbreviation table and assigns a unique abbreviation id for
4385 each abbreviation entry. The children of each die are visited
4389 build_abbrev_table (die)
4390 register dw_die_ref die;
4392 register unsigned long abbrev_id;
4393 register unsigned long n_alloc;
4394 register dw_die_ref c;
4395 register dw_attr_ref d_attr, a_attr;
4396 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4398 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4400 if (abbrev->die_tag == die->die_tag)
4402 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4404 a_attr = abbrev->die_attr;
4405 d_attr = die->die_attr;
4407 while (a_attr != NULL && d_attr != NULL)
4409 if ((a_attr->dw_attr != d_attr->dw_attr)
4410 || (value_format (&a_attr->dw_attr_val)
4411 != value_format (&d_attr->dw_attr_val)))
4414 a_attr = a_attr->dw_attr_next;
4415 d_attr = d_attr->dw_attr_next;
4418 if (a_attr == NULL && d_attr == NULL)
4424 if (abbrev_id >= abbrev_die_table_in_use)
4426 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4428 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4430 = (dw_die_ref *) xrealloc (abbrev_die_table,
4431 sizeof (dw_die_ref) * n_alloc);
4433 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4434 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
4435 abbrev_die_table_allocated = n_alloc;
4438 ++abbrev_die_table_in_use;
4439 abbrev_die_table[abbrev_id] = die;
4442 die->die_abbrev = abbrev_id;
4443 for (c = die->die_child; c != NULL; c = c->die_sib)
4444 build_abbrev_table (c);
4447 /* Return the size of a string, including the null byte. */
4449 static unsigned long
4450 size_of_string (str)
4453 register unsigned long size = 0;
4454 register unsigned long slen = strlen (str);
4455 register unsigned long i;
4456 register unsigned c;
4458 for (i = 0; i < slen; ++i)
4467 /* Null terminator. */
4472 /* Return the size of a location descriptor. */
4474 static unsigned long
4475 size_of_loc_descr (loc)
4476 register dw_loc_descr_ref loc;
4478 register unsigned long size = 1;
4480 switch (loc->dw_loc_opc)
4502 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4505 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4510 case DW_OP_plus_uconst:
4511 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4549 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4552 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4555 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
4558 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4559 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
4562 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
4564 case DW_OP_deref_size:
4565 case DW_OP_xderef_size:
4575 /* Return the size of a series of location descriptors. */
4577 static unsigned long
4579 register dw_loc_descr_ref loc;
4581 register unsigned long size = 0;
4583 for (; loc != NULL; loc = loc->dw_loc_next)
4584 size += size_of_loc_descr (loc);
4589 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4592 constant_size (value)
4593 long unsigned value;
4600 log = floor_log2 (value);
4603 log = 1 << (floor_log2 (log) + 1);
4608 /* Return the size of a DIE, as it is represented in the
4609 .debug_info section. */
4611 static unsigned long
4613 register dw_die_ref die;
4615 register unsigned long size = 0;
4616 register dw_attr_ref a;
4618 size += size_of_uleb128 (die->die_abbrev);
4619 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4621 switch (a->dw_attr_val.val_class)
4623 case dw_val_class_addr:
4626 case dw_val_class_loc:
4628 register unsigned long lsize
4629 = size_of_locs (a->dw_attr_val.v.val_loc);
4632 size += constant_size (lsize);
4636 case dw_val_class_const:
4639 case dw_val_class_unsigned_const:
4640 size += constant_size (a->dw_attr_val.v.val_unsigned);
4642 case dw_val_class_long_long:
4643 size += 1 + 8; /* block */
4645 case dw_val_class_float:
4646 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
4648 case dw_val_class_flag:
4651 case dw_val_class_die_ref:
4652 size += DWARF_OFFSET_SIZE;
4654 case dw_val_class_fde_ref:
4655 size += DWARF_OFFSET_SIZE;
4657 case dw_val_class_lbl_id:
4660 case dw_val_class_section_offset:
4661 size += DWARF_OFFSET_SIZE;
4663 case dw_val_class_str:
4664 size += size_of_string (a->dw_attr_val.v.val_str);
4674 /* Size the debugging information associated with a given DIE.
4675 Visits the DIE's children recursively. Updates the global
4676 variable next_die_offset, on each time through. Uses the
4677 current value of next_die_offset to update the die_offset
4678 field in each DIE. */
4681 calc_die_sizes (die)
4684 register dw_die_ref c;
4685 die->die_offset = next_die_offset;
4686 next_die_offset += size_of_die (die);
4688 for (c = die->die_child; c != NULL; c = c->die_sib)
4691 if (die->die_child != NULL)
4692 /* Count the null byte used to terminate sibling lists. */
4693 next_die_offset += 1;
4696 /* Return the size of the line information prolog generated for the
4697 compilation unit. */
4699 static unsigned long
4700 size_of_line_prolog ()
4702 register unsigned long size;
4703 register unsigned long ft_index;
4705 size = DWARF_LINE_PROLOG_HEADER_SIZE;
4707 /* Count the size of the table giving number of args for each
4709 size += DWARF_LINE_OPCODE_BASE - 1;
4711 /* Include directory table is empty (at present). Count only the
4712 null byte used to terminate the table. */
4715 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
4717 /* File name entry. */
4718 size += size_of_string (file_table[ft_index]);
4720 /* Include directory index. */
4721 size += size_of_uleb128 (0);
4723 /* Modification time. */
4724 size += size_of_uleb128 (0);
4726 /* File length in bytes. */
4727 size += size_of_uleb128 (0);
4730 /* Count the file table terminator. */
4735 /* Return the size of the line information generated for this
4736 compilation unit. */
4738 static unsigned long
4739 size_of_line_info ()
4741 register unsigned long size;
4742 register unsigned long lt_index;
4743 register unsigned long current_line;
4744 register long line_offset;
4745 register long line_delta;
4746 register unsigned long current_file;
4747 register unsigned long function;
4748 unsigned long size_of_set_address;
4750 /* Size of a DW_LNE_set_address instruction. */
4751 size_of_set_address = 1 + size_of_uleb128 (1 + PTR_SIZE) + 1 + PTR_SIZE;
4753 /* Version number. */
4756 /* Prolog length specifier. */
4757 size += DWARF_OFFSET_SIZE;
4760 size += size_of_line_prolog ();
4762 /* Set address register instruction. */
4763 size += size_of_set_address;
4767 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
4769 register dw_line_info_ref line_info;
4771 /* Advance pc instruction. */
4772 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4776 size += size_of_set_address;
4778 line_info = &line_info_table[lt_index];
4779 if (line_info->dw_file_num != current_file)
4781 /* Set file number instruction. */
4783 current_file = line_info->dw_file_num;
4784 size += size_of_uleb128 (current_file);
4787 if (line_info->dw_line_num != current_line)
4789 line_offset = line_info->dw_line_num - current_line;
4790 line_delta = line_offset - DWARF_LINE_BASE;
4791 current_line = line_info->dw_line_num;
4792 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4793 /* 1-byte special line number instruction. */
4797 /* Advance line instruction. */
4799 size += size_of_sleb128 (line_offset);
4800 /* Generate line entry instruction. */
4806 /* Advance pc instruction. */
4810 size += size_of_set_address;
4812 /* End of line number info. marker. */
4813 size += 1 + size_of_uleb128 (1) + 1;
4818 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
4820 register dw_separate_line_info_ref line_info
4821 = &separate_line_info_table[lt_index];
4822 if (function != line_info->function)
4824 function = line_info->function;
4825 /* Set address register instruction. */
4826 size += size_of_set_address;
4830 /* Advance pc instruction. */
4834 size += size_of_set_address;
4837 if (line_info->dw_file_num != current_file)
4839 /* Set file number instruction. */
4841 current_file = line_info->dw_file_num;
4842 size += size_of_uleb128 (current_file);
4845 if (line_info->dw_line_num != current_line)
4847 line_offset = line_info->dw_line_num - current_line;
4848 line_delta = line_offset - DWARF_LINE_BASE;
4849 current_line = line_info->dw_line_num;
4850 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
4851 /* 1-byte special line number instruction. */
4855 /* Advance line instruction. */
4857 size += size_of_sleb128 (line_offset);
4859 /* Generate line entry instruction. */
4866 /* If we're done with a function, end its sequence. */
4867 if (lt_index == separate_line_info_table_in_use
4868 || separate_line_info_table[lt_index].function != function)
4873 /* Advance pc instruction. */
4877 size += size_of_set_address;
4879 /* End of line number info. marker. */
4880 size += 1 + size_of_uleb128 (1) + 1;
4887 /* Return the size of the .debug_pubnames table generated for the
4888 compilation unit. */
4890 static unsigned long
4893 register unsigned long size;
4894 register unsigned i;
4896 size = DWARF_PUBNAMES_HEADER_SIZE;
4897 for (i = 0; i < pubname_table_in_use; ++i)
4899 register pubname_ref p = &pubname_table[i];
4900 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
4903 size += DWARF_OFFSET_SIZE;
4907 /* Return the size of the information in the .debug_aranges section. */
4909 static unsigned long
4912 register unsigned long size;
4914 size = DWARF_ARANGES_HEADER_SIZE;
4916 /* Count the address/length pair for this compilation unit. */
4917 size += 2 * PTR_SIZE;
4918 size += 2 * PTR_SIZE * arange_table_in_use;
4920 /* Count the two zero words used to terminated the address range table. */
4921 size += 2 * PTR_SIZE;
4925 /* Select the encoding of an attribute value. */
4927 static enum dwarf_form
4931 switch (v->val_class)
4933 case dw_val_class_addr:
4934 return DW_FORM_addr;
4935 case dw_val_class_loc:
4936 switch (constant_size (size_of_locs (v->v.val_loc)))
4939 return DW_FORM_block1;
4941 return DW_FORM_block2;
4945 case dw_val_class_const:
4946 return DW_FORM_data4;
4947 case dw_val_class_unsigned_const:
4948 switch (constant_size (v->v.val_unsigned))
4951 return DW_FORM_data1;
4953 return DW_FORM_data2;
4955 return DW_FORM_data4;
4957 return DW_FORM_data8;
4961 case dw_val_class_long_long:
4962 return DW_FORM_block1;
4963 case dw_val_class_float:
4964 return DW_FORM_block1;
4965 case dw_val_class_flag:
4966 return DW_FORM_flag;
4967 case dw_val_class_die_ref:
4969 case dw_val_class_fde_ref:
4970 return DW_FORM_data;
4971 case dw_val_class_lbl_id:
4972 return DW_FORM_addr;
4973 case dw_val_class_section_offset:
4974 return DW_FORM_data;
4975 case dw_val_class_str:
4976 return DW_FORM_string;
4982 /* Output the encoding of an attribute value. */
4985 output_value_format (v)
4988 enum dwarf_form form = value_format (v);
4990 output_uleb128 (form);
4992 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
4994 fputc ('\n', asm_out_file);
4997 /* Output the .debug_abbrev section which defines the DIE abbreviation
5001 output_abbrev_section ()
5003 unsigned long abbrev_id;
5006 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5008 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5010 output_uleb128 (abbrev_id);
5012 fprintf (asm_out_file, " (abbrev code)");
5014 fputc ('\n', asm_out_file);
5015 output_uleb128 (abbrev->die_tag);
5017 fprintf (asm_out_file, " (TAG: %s)",
5018 dwarf_tag_name (abbrev->die_tag));
5020 fputc ('\n', asm_out_file);
5021 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5022 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5025 fprintf (asm_out_file, "\t%s %s",
5027 (abbrev->die_child != NULL
5028 ? "DW_children_yes" : "DW_children_no"));
5030 fputc ('\n', asm_out_file);
5032 for (a_attr = abbrev->die_attr; a_attr != NULL;
5033 a_attr = a_attr->dw_attr_next)
5035 output_uleb128 (a_attr->dw_attr);
5037 fprintf (asm_out_file, " (%s)",
5038 dwarf_attr_name (a_attr->dw_attr));
5040 fputc ('\n', asm_out_file);
5041 output_value_format (&a_attr->dw_attr_val);
5044 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5048 /* Output location description stack opcode's operands (if any). */
5051 output_loc_operands (loc)
5052 register dw_loc_descr_ref loc;
5054 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
5055 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
5057 switch (loc->dw_loc_opc)
5060 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
5061 fputc ('\n', asm_out_file);
5065 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5066 fputc ('\n', asm_out_file);
5070 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5071 fputc ('\n', asm_out_file);
5075 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
5076 fputc ('\n', asm_out_file);
5081 fputc ('\n', asm_out_file);
5084 output_uleb128 (val1->v.val_unsigned);
5085 fputc ('\n', asm_out_file);
5088 output_sleb128 (val1->v.val_int);
5089 fputc ('\n', asm_out_file);
5092 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
5093 fputc ('\n', asm_out_file);
5095 case DW_OP_plus_uconst:
5096 output_uleb128 (val1->v.val_unsigned);
5097 fputc ('\n', asm_out_file);
5101 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
5102 fputc ('\n', asm_out_file);
5136 output_sleb128 (val1->v.val_int);
5137 fputc ('\n', asm_out_file);
5140 output_uleb128 (val1->v.val_unsigned);
5141 fputc ('\n', asm_out_file);
5144 output_sleb128 (val1->v.val_int);
5145 fputc ('\n', asm_out_file);
5148 output_uleb128 (val1->v.val_unsigned);
5149 fputc ('\n', asm_out_file);
5150 output_sleb128 (val2->v.val_int);
5151 fputc ('\n', asm_out_file);
5154 output_uleb128 (val1->v.val_unsigned);
5155 fputc ('\n', asm_out_file);
5157 case DW_OP_deref_size:
5158 case DW_OP_xderef_size:
5159 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
5160 fputc ('\n', asm_out_file);
5167 /* Compute the offset of a sibling. */
5169 static unsigned long
5170 sibling_offset (die)
5173 unsigned long offset;
5175 if (die->die_child_last == NULL)
5176 offset = die->die_offset + size_of_die (die);
5178 offset = sibling_offset (die->die_child_last) + 1;
5183 /* Output the DIE and its attributes. Called recursively to generate
5184 the definitions of each child DIE. */
5188 register dw_die_ref die;
5190 register dw_attr_ref a;
5191 register dw_die_ref c;
5192 register unsigned long ref_offset;
5193 register unsigned long size;
5194 register dw_loc_descr_ref loc;
5197 output_uleb128 (die->die_abbrev);
5199 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5200 die->die_offset, dwarf_tag_name (die->die_tag));
5202 fputc ('\n', asm_out_file);
5204 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5206 switch (a->dw_attr_val.val_class)
5208 case dw_val_class_addr:
5209 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5210 a->dw_attr_val.v.val_addr);
5213 case dw_val_class_loc:
5214 size = size_of_locs (a->dw_attr_val.v.val_loc);
5216 /* Output the block length for this list of location operations. */
5217 switch (constant_size (size))
5220 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5223 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5230 fprintf (asm_out_file, "\t%s %s",
5231 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5233 fputc ('\n', asm_out_file);
5234 for (loc = a->dw_attr_val.v.val_loc; loc != NULL;
5235 loc = loc->dw_loc_next)
5237 /* Output the opcode. */
5238 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
5240 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
5241 dwarf_stack_op_name (loc->dw_loc_opc));
5243 fputc ('\n', asm_out_file);
5245 /* Output the operand(s) (if any). */
5246 output_loc_operands (loc);
5250 case dw_val_class_const:
5251 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, a->dw_attr_val.v.val_int);
5254 case dw_val_class_unsigned_const:
5255 switch (constant_size (a->dw_attr_val.v.val_unsigned))
5258 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5259 a->dw_attr_val.v.val_unsigned);
5262 ASM_OUTPUT_DWARF_DATA2 (asm_out_file,
5263 a->dw_attr_val.v.val_unsigned);
5266 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5267 a->dw_attr_val.v.val_unsigned);
5270 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5271 a->dw_attr_val.v.val_long_long.hi,
5272 a->dw_attr_val.v.val_long_long.low);
5279 case dw_val_class_long_long:
5280 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5282 fprintf (asm_out_file, "\t%s %s",
5283 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5285 fputc ('\n', asm_out_file);
5286 ASM_OUTPUT_DWARF_DATA8 (asm_out_file,
5287 a->dw_attr_val.v.val_long_long.hi,
5288 a->dw_attr_val.v.val_long_long.low);
5291 fprintf (asm_out_file,
5292 "\t%s long long constant", ASM_COMMENT_START);
5294 fputc ('\n', asm_out_file);
5297 case dw_val_class_float:
5298 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5299 a->dw_attr_val.v.val_float.length * 4);
5301 fprintf (asm_out_file, "\t%s %s",
5302 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5304 fputc ('\n', asm_out_file);
5305 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5307 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5308 a->dw_attr_val.v.val_float.array[i]);
5310 fprintf (asm_out_file, "\t%s fp constant word %d",
5311 ASM_COMMENT_START, i);
5313 fputc ('\n', asm_out_file);
5317 case dw_val_class_flag:
5318 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, a->dw_attr_val.v.val_flag);
5321 case dw_val_class_die_ref:
5322 if (a->dw_attr_val.v.val_die_ref != NULL)
5323 ref_offset = a->dw_attr_val.v.val_die_ref->die_offset;
5324 else if (a->dw_attr == DW_AT_sibling)
5325 ref_offset = sibling_offset(die);
5329 ASM_OUTPUT_DWARF_DATA (asm_out_file, ref_offset);
5332 case dw_val_class_fde_ref:
5335 ASM_GENERATE_INTERNAL_LABEL
5336 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5337 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5338 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5342 case dw_val_class_lbl_id:
5343 ASM_OUTPUT_DWARF_ADDR (asm_out_file, a->dw_attr_val.v.val_lbl_id);
5346 case dw_val_class_section_offset:
5347 ASM_OUTPUT_DWARF_OFFSET (asm_out_file,
5349 (a->dw_attr_val.v.val_section));
5352 case dw_val_class_str:
5354 ASM_OUTPUT_DWARF_STRING (asm_out_file, a->dw_attr_val.v.val_str);
5356 ASM_OUTPUT_ASCII (asm_out_file,
5357 a->dw_attr_val.v.val_str,
5358 strlen (a->dw_attr_val.v.val_str) + 1);
5365 if (a->dw_attr_val.val_class != dw_val_class_loc
5366 && a->dw_attr_val.val_class != dw_val_class_long_long
5367 && a->dw_attr_val.val_class != dw_val_class_float)
5370 fprintf (asm_out_file, "\t%s %s",
5371 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5373 fputc ('\n', asm_out_file);
5377 for (c = die->die_child; c != NULL; c = c->die_sib)
5380 if (die->die_child != NULL)
5382 /* Add null byte to terminate sibling list. */
5383 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5385 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5386 ASM_COMMENT_START, die->die_offset);
5388 fputc ('\n', asm_out_file);
5392 /* Output the compilation unit that appears at the beginning of the
5393 .debug_info section, and precedes the DIE descriptions. */
5396 output_compilation_unit_header ()
5398 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5400 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5403 fputc ('\n', asm_out_file);
5404 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5406 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5408 fputc ('\n', asm_out_file);
5409 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (ABBREV_SECTION));
5411 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5414 fputc ('\n', asm_out_file);
5415 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5417 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5419 fputc ('\n', asm_out_file);
5422 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5423 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5424 argument list, and maybe the scope. */
5427 dwarf2_name (decl, scope)
5431 return (*decl_printable_name) (decl, scope ? 1 : 0);
5434 /* Add a new entry to .debug_pubnames if appropriate. */
5437 add_pubname (decl, die)
5443 if (! TREE_PUBLIC (decl))
5446 if (pubname_table_in_use == pubname_table_allocated)
5448 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5449 pubname_table = (pubname_ref) xrealloc
5450 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5453 p = &pubname_table[pubname_table_in_use++];
5456 p->name = xstrdup (dwarf2_name (decl, 1));
5459 /* Output the public names table used to speed up access to externally
5460 visible names. For now, only generate entries for externally
5461 visible procedures. */
5466 register unsigned i;
5467 register unsigned long pubnames_length = size_of_pubnames ();
5469 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5472 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5475 fputc ('\n', asm_out_file);
5476 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5479 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5481 fputc ('\n', asm_out_file);
5482 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5484 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5487 fputc ('\n', asm_out_file);
5488 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5490 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5492 fputc ('\n', asm_out_file);
5493 for (i = 0; i < pubname_table_in_use; ++i)
5495 register pubname_ref pub = &pubname_table[i];
5497 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5499 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5501 fputc ('\n', asm_out_file);
5505 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5506 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5510 ASM_OUTPUT_ASCII (asm_out_file, pub->name, strlen (pub->name) + 1);
5513 fputc ('\n', asm_out_file);
5516 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5517 fputc ('\n', asm_out_file);
5520 /* Add a new entry to .debug_aranges if appropriate. */
5523 add_arange (decl, die)
5527 if (! DECL_SECTION_NAME (decl))
5530 if (arange_table_in_use == arange_table_allocated)
5532 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5534 = (arange_ref) xrealloc (arange_table,
5535 arange_table_allocated * sizeof (dw_die_ref));
5538 arange_table[arange_table_in_use++] = die;
5541 /* Output the information that goes into the .debug_aranges table.
5542 Namely, define the beginning and ending address range of the
5543 text section generated for this compilation unit. */
5548 register unsigned i;
5549 register unsigned long aranges_length = size_of_aranges ();
5551 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5553 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5556 fputc ('\n', asm_out_file);
5557 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5559 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5561 fputc ('\n', asm_out_file);
5562 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (DEBUG_INFO_SECTION));
5564 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5567 fputc ('\n', asm_out_file);
5568 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, PTR_SIZE);
5570 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5572 fputc ('\n', asm_out_file);
5573 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5575 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5578 fputc ('\n', asm_out_file);
5579 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 4);
5581 fprintf (asm_out_file, ",0,0");
5584 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5585 ASM_COMMENT_START, 2 * PTR_SIZE);
5587 fputc ('\n', asm_out_file);
5588 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
5590 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5592 fputc ('\n', asm_out_file);
5593 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label, TEXT_SECTION);
5595 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5597 fputc ('\n', asm_out_file);
5598 for (i = 0; i < arange_table_in_use; ++i)
5600 dw_die_ref a = arange_table[i];
5602 if (a->die_tag == DW_TAG_subprogram)
5603 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (a));
5606 char *name = get_AT_string (a, DW_AT_MIPS_linkage_name);
5608 name = get_AT_string (a, DW_AT_name);
5610 ASM_OUTPUT_DWARF_ADDR (asm_out_file, name);
5614 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5616 fputc ('\n', asm_out_file);
5617 if (a->die_tag == DW_TAG_subprogram)
5618 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (a),
5621 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5622 get_AT_unsigned (a, DW_AT_byte_size));
5625 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5627 fputc ('\n', asm_out_file);
5630 /* Output the terminator words. */
5631 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5632 fputc ('\n', asm_out_file);
5633 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5634 fputc ('\n', asm_out_file);
5637 /* Output the source line number correspondence information. This
5638 information goes into the .debug_line section.
5640 If the format of this data changes, then the function size_of_line_info
5641 must also be adjusted the same way. */
5646 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5647 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5648 register unsigned opc;
5649 register unsigned n_op_args;
5650 register unsigned long ft_index;
5651 register unsigned long lt_index;
5652 register unsigned long current_line;
5653 register long line_offset;
5654 register long line_delta;
5655 register unsigned long current_file;
5656 register unsigned long function;
5658 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_info ());
5660 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5663 fputc ('\n', asm_out_file);
5664 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5666 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5668 fputc ('\n', asm_out_file);
5669 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5671 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5673 fputc ('\n', asm_out_file);
5674 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5676 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5679 fputc ('\n', asm_out_file);
5680 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5682 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5685 fputc ('\n', asm_out_file);
5686 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5688 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5691 fputc ('\n', asm_out_file);
5692 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5694 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5697 fputc ('\n', asm_out_file);
5698 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5700 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5702 fputc ('\n', asm_out_file);
5703 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5707 case DW_LNS_advance_pc:
5708 case DW_LNS_advance_line:
5709 case DW_LNS_set_file:
5710 case DW_LNS_set_column:
5711 case DW_LNS_fixed_advance_pc:
5718 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5720 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5721 ASM_COMMENT_START, opc, n_op_args);
5722 fputc ('\n', asm_out_file);
5726 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5728 /* Include directory table is empty, at present */
5729 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5730 fputc ('\n', asm_out_file);
5732 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5734 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5738 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5739 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5740 ASM_COMMENT_START, ft_index);
5744 ASM_OUTPUT_ASCII (asm_out_file,
5745 file_table[ft_index],
5746 strlen (file_table[ft_index]) + 1);
5749 fputc ('\n', asm_out_file);
5751 /* Include directory index */
5753 fputc ('\n', asm_out_file);
5755 /* Modification time */
5757 fputc ('\n', asm_out_file);
5759 /* File length in bytes */
5761 fputc ('\n', asm_out_file);
5764 /* Terminate the file name table */
5765 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5766 fputc ('\n', asm_out_file);
5768 /* Set the address register to the first location in the text section */
5769 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5771 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5773 fputc ('\n', asm_out_file);
5774 output_uleb128 (1 + PTR_SIZE);
5775 fputc ('\n', asm_out_file);
5776 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5777 fputc ('\n', asm_out_file);
5778 ASM_OUTPUT_DWARF_ADDR (asm_out_file, TEXT_SECTION);
5779 fputc ('\n', asm_out_file);
5781 /* Generate the line number to PC correspondence table, encoded as
5782 a series of state machine operations. */
5785 strcpy (prev_line_label, TEXT_SECTION);
5786 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5788 register dw_line_info_ref line_info;
5790 /* Emit debug info for the address of the current line, choosing
5791 the encoding that uses the least amount of space. */
5792 /* ??? Unfortunately, we have little choice here currently, and must
5793 always use the most general form. Gcc does not know the address
5794 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5795 dwarf2 aware assemblers at this time, so we can't use any special
5796 pseudo ops that would allow the assembler to optimally encode this for
5797 us. Many ports do have length attributes which will give an upper
5798 bound on the address range. We could perhaps use length attributes
5799 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5800 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5803 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5804 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5806 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5809 fputc ('\n', asm_out_file);
5810 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5811 fputc ('\n', asm_out_file);
5815 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5816 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5818 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5820 fputc ('\n', asm_out_file);
5821 output_uleb128 (1 + PTR_SIZE);
5822 fputc ('\n', asm_out_file);
5823 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5824 fputc ('\n', asm_out_file);
5825 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5826 fputc ('\n', asm_out_file);
5828 strcpy (prev_line_label, line_label);
5830 /* Emit debug info for the source file of the current line, if
5831 different from the previous line. */
5832 line_info = &line_info_table[lt_index];
5833 if (line_info->dw_file_num != current_file)
5835 current_file = line_info->dw_file_num;
5836 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5838 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5840 fputc ('\n', asm_out_file);
5841 output_uleb128 (current_file);
5843 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5845 fputc ('\n', asm_out_file);
5848 /* Emit debug info for the current line number, choosing the encoding
5849 that uses the least amount of space. */
5850 line_offset = line_info->dw_line_num - current_line;
5851 line_delta = line_offset - DWARF_LINE_BASE;
5852 current_line = line_info->dw_line_num;
5853 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
5855 /* This can handle deltas from -10 to 234, using the current
5856 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5858 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5859 DWARF_LINE_OPCODE_BASE + line_delta);
5861 fprintf (asm_out_file,
5862 "\t%s line %ld", ASM_COMMENT_START, current_line);
5864 fputc ('\n', asm_out_file);
5868 /* This can handle any delta. This takes at least 4 bytes, depending
5869 on the value being encoded. */
5870 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
5872 fprintf (asm_out_file, "\t%s advance to line %ld",
5873 ASM_COMMENT_START, current_line);
5875 fputc ('\n', asm_out_file);
5876 output_sleb128 (line_offset);
5877 fputc ('\n', asm_out_file);
5878 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
5879 fputc ('\n', asm_out_file);
5883 /* Emit debug info for the address of the end of the function. */
5886 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5888 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5891 fputc ('\n', asm_out_file);
5892 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
5893 fputc ('\n', asm_out_file);
5897 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5899 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
5900 fputc ('\n', asm_out_file);
5901 output_uleb128 (1 + PTR_SIZE);
5902 fputc ('\n', asm_out_file);
5903 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5904 fputc ('\n', asm_out_file);
5905 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
5906 fputc ('\n', asm_out_file);
5909 /* Output the marker for the end of the line number info. */
5910 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5912 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
5914 fputc ('\n', asm_out_file);
5916 fputc ('\n', asm_out_file);
5917 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
5918 fputc ('\n', asm_out_file);
5923 for (lt_index = 0; lt_index < separate_line_info_table_in_use; )
5925 register dw_separate_line_info_ref line_info
5926 = &separate_line_info_table[lt_index];
5928 /* Emit debug info for the address of the current line. If this is
5929 a new function, or the first line of a function, then we need
5930 to handle it differently. */
5931 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
5933 if (function != line_info->function)
5935 function = line_info->function;
5937 /* Set the address register to the first line in the function */
5938 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5940 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5943 fputc ('\n', asm_out_file);
5944 output_uleb128 (1 + PTR_SIZE);
5945 fputc ('\n', asm_out_file);
5946 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5947 fputc ('\n', asm_out_file);
5948 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5949 fputc ('\n', asm_out_file);
5953 /* ??? See the DW_LNS_advance_pc comment above. */
5956 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5958 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5961 fputc ('\n', asm_out_file);
5962 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
5964 fputc ('\n', asm_out_file);
5968 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5970 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5972 fputc ('\n', asm_out_file);
5973 output_uleb128 (1 + PTR_SIZE);
5974 fputc ('\n', asm_out_file);
5975 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5976 fputc ('\n', asm_out_file);
5977 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5978 fputc ('\n', asm_out_file);
5981 strcpy (prev_line_label, line_label);
5983 /* Emit debug info for the source file of the current line, if
5984 different from the previous line. */
5985 if (line_info->dw_file_num != current_file)
5987 current_file = line_info->dw_file_num;
5988 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5990 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5992 fputc ('\n', asm_out_file);
5993 output_uleb128 (current_file);
5995 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5997 fputc ('\n', asm_out_file);
6000 /* Emit debug info for the current line number, choosing the encoding
6001 that uses the least amount of space. */
6002 if (line_info->dw_line_num != current_line)
6004 line_offset = line_info->dw_line_num - current_line;
6005 line_delta = line_offset - DWARF_LINE_BASE;
6006 current_line = line_info->dw_line_num;
6007 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6009 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6010 DWARF_LINE_OPCODE_BASE + line_delta);
6012 fprintf (asm_out_file,
6013 "\t%s line %ld", ASM_COMMENT_START, current_line);
6015 fputc ('\n', asm_out_file);
6019 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6021 fprintf (asm_out_file, "\t%s advance to line %ld",
6022 ASM_COMMENT_START, current_line);
6024 fputc ('\n', asm_out_file);
6025 output_sleb128 (line_offset);
6026 fputc ('\n', asm_out_file);
6027 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6028 fputc ('\n', asm_out_file);
6034 /* If we're done with a function, end its sequence. */
6035 if (lt_index == separate_line_info_table_in_use
6036 || separate_line_info_table[lt_index].function != function)
6041 /* Emit debug info for the address of the end of the function. */
6042 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6045 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6047 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6050 fputc ('\n', asm_out_file);
6051 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6053 fputc ('\n', asm_out_file);
6057 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6059 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6061 fputc ('\n', asm_out_file);
6062 output_uleb128 (1 + PTR_SIZE);
6063 fputc ('\n', asm_out_file);
6064 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6065 fputc ('\n', asm_out_file);
6066 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6067 fputc ('\n', asm_out_file);
6070 /* Output the marker for the end of this sequence. */
6071 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6073 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6076 fputc ('\n', asm_out_file);
6078 fputc ('\n', asm_out_file);
6079 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6080 fputc ('\n', asm_out_file);
6085 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6086 in question represents the outermost pair of curly braces (i.e. the "body
6087 block") of a function or method.
6089 For any BLOCK node representing a "body block" of a function or method, the
6090 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6091 represents the outermost (function) scope for the function or method (i.e.
6092 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6093 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6096 is_body_block (stmt)
6099 if (TREE_CODE (stmt) == BLOCK)
6101 register tree parent = BLOCK_SUPERCONTEXT (stmt);
6103 if (TREE_CODE (parent) == BLOCK)
6105 register tree grandparent = BLOCK_SUPERCONTEXT (parent);
6107 if (TREE_CODE (grandparent) == FUNCTION_DECL)
6115 /* Given a pointer to a tree node for some base type, return a pointer to
6116 a DIE that describes the given type.
6118 This routine must only be called for GCC type nodes that correspond to
6119 Dwarf base (fundamental) types. */
6122 base_type_die (type)
6125 register dw_die_ref base_type_result;
6126 register char *type_name;
6127 register enum dwarf_type encoding;
6128 register tree name = TYPE_NAME (type);
6130 if (TREE_CODE (type) == ERROR_MARK
6131 || TREE_CODE (type) == VOID_TYPE)
6134 if (TREE_CODE (name) == TYPE_DECL)
6135 name = DECL_NAME (name);
6136 type_name = IDENTIFIER_POINTER (name);
6138 switch (TREE_CODE (type))
6141 /* Carefully distinguish the C character types, without messing
6142 up if the language is not C. Note that we check only for the names
6143 that contain spaces; other names might occur by coincidence in other
6145 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6146 && (type == char_type_node
6147 || ! strcmp (type_name, "signed char")
6148 || ! strcmp (type_name, "unsigned char"))))
6150 if (TREE_UNSIGNED (type))
6151 encoding = DW_ATE_unsigned;
6153 encoding = DW_ATE_signed;
6156 /* else fall through */
6159 /* GNU Pascal/Ada CHAR type. Not used in C. */
6160 if (TREE_UNSIGNED (type))
6161 encoding = DW_ATE_unsigned_char;
6163 encoding = DW_ATE_signed_char;
6167 encoding = DW_ATE_float;
6171 encoding = DW_ATE_complex_float;
6175 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6176 encoding = DW_ATE_boolean;
6180 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6183 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6184 add_AT_string (base_type_result, DW_AT_name, type_name);
6185 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6186 int_size_in_bytes (type));
6187 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6189 return base_type_result;
6192 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6193 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6194 a given type is generally the same as the given type, except that if the
6195 given type is a pointer or reference type, then the root type of the given
6196 type is the root type of the "basis" type for the pointer or reference
6197 type. (This definition of the "root" type is recursive.) Also, the root
6198 type of a `const' qualified type or a `volatile' qualified type is the
6199 root type of the given type without the qualifiers. */
6205 if (TREE_CODE (type) == ERROR_MARK)
6206 return error_mark_node;
6208 switch (TREE_CODE (type))
6211 return error_mark_node;
6214 case REFERENCE_TYPE:
6215 return type_main_variant (root_type (TREE_TYPE (type)));
6218 return type_main_variant (type);
6222 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6223 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6229 switch (TREE_CODE (type))
6244 case QUAL_UNION_TYPE:
6249 case REFERENCE_TYPE:
6262 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6263 entry that chains various modifiers in front of the given type. */
6266 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6268 register int is_const_type;
6269 register int is_volatile_type;
6270 register dw_die_ref context_die;
6272 register enum tree_code code = TREE_CODE (type);
6273 register dw_die_ref mod_type_die = NULL;
6274 register dw_die_ref sub_die = NULL;
6275 register tree item_type = NULL;
6277 if (code != ERROR_MARK)
6279 type = build_type_variant (type, is_const_type, is_volatile_type);
6281 mod_type_die = lookup_type_die (type);
6283 return mod_type_die;
6285 /* Handle C typedef types. */
6286 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6287 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6289 tree dtype = TREE_TYPE (TYPE_NAME (type));
6292 /* For a named type, use the typedef. */
6293 gen_type_die (type, context_die);
6294 mod_type_die = lookup_type_die (type);
6297 else if (is_const_type < TYPE_READONLY (dtype)
6298 || is_volatile_type < TYPE_VOLATILE (dtype))
6299 /* cv-unqualified version of named type. Just use the unnamed
6300 type to which it refers. */
6302 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6303 is_const_type, is_volatile_type,
6305 /* Else cv-qualified version of named type; fall through. */
6310 else if (is_const_type)
6312 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6313 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6315 else if (is_volatile_type)
6317 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6318 sub_die = modified_type_die (type, 0, 0, context_die);
6320 else if (code == POINTER_TYPE)
6322 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6323 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6325 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6327 item_type = TREE_TYPE (type);
6329 else if (code == REFERENCE_TYPE)
6331 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6332 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6334 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6336 item_type = TREE_TYPE (type);
6338 else if (is_base_type (type))
6339 mod_type_die = base_type_die (type);
6342 gen_type_die (type, context_die);
6344 /* We have to get the type_main_variant here (and pass that to the
6345 `lookup_type_die' routine) because the ..._TYPE node we have
6346 might simply be a *copy* of some original type node (where the
6347 copy was created to help us keep track of typedef names) and
6348 that copy might have a different TYPE_UID from the original
6350 mod_type_die = lookup_type_die (type_main_variant (type));
6351 if (mod_type_die == NULL)
6356 equate_type_number_to_die (type, mod_type_die);
6358 /* We must do this after the equate_type_number_to_die call, in case
6359 this is a recursive type. This ensures that the modified_type_die
6360 recursion will terminate even if the type is recursive. Recursive
6361 types are possible in Ada. */
6362 sub_die = modified_type_die (item_type,
6363 TYPE_READONLY (item_type),
6364 TYPE_VOLATILE (item_type),
6367 if (sub_die != NULL)
6368 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6370 return mod_type_die;
6373 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6374 an enumerated type. */
6380 return TREE_CODE (type) == ENUMERAL_TYPE;
6383 /* Return a location descriptor that designates a machine register. */
6385 static dw_loc_descr_ref
6386 reg_loc_descriptor (rtl)
6389 register dw_loc_descr_ref loc_result = NULL;
6390 register unsigned reg = reg_number (rtl);
6393 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6395 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6400 /* Return a location descriptor that designates a base+offset location. */
6402 static dw_loc_descr_ref
6403 based_loc_descr (reg, offset)
6407 register dw_loc_descr_ref loc_result;
6408 /* For the "frame base", we use the frame pointer or stack pointer
6409 registers, since the RTL for local variables is relative to one of
6411 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6412 ? HARD_FRAME_POINTER_REGNUM
6413 : STACK_POINTER_REGNUM);
6416 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6418 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6420 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6425 /* Return true if this RTL expression describes a base+offset calculation. */
6431 return (GET_CODE (rtl) == PLUS
6432 && ((GET_CODE (XEXP (rtl, 0)) == REG
6433 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6436 /* The following routine converts the RTL for a variable or parameter
6437 (resident in memory) into an equivalent Dwarf representation of a
6438 mechanism for getting the address of that same variable onto the top of a
6439 hypothetical "address evaluation" stack.
6441 When creating memory location descriptors, we are effectively transforming
6442 the RTL for a memory-resident object into its Dwarf postfix expression
6443 equivalent. This routine recursively descends an RTL tree, turning
6444 it into Dwarf postfix code as it goes. */
6446 static dw_loc_descr_ref
6447 mem_loc_descriptor (rtl)
6450 dw_loc_descr_ref mem_loc_result = NULL;
6451 /* Note that for a dynamically sized array, the location we will generate a
6452 description of here will be the lowest numbered location which is
6453 actually within the array. That's *not* necessarily the same as the
6454 zeroth element of the array. */
6456 switch (GET_CODE (rtl))
6459 /* The case of a subreg may arise when we have a local (register)
6460 variable or a formal (register) parameter which doesn't quite fill
6461 up an entire register. For now, just assume that it is
6462 legitimate to make the Dwarf info refer to the whole register which
6463 contains the given subreg. */
6464 rtl = XEXP (rtl, 0);
6466 /* ... fall through ... */
6469 /* Whenever a register number forms a part of the description of the
6470 method for calculating the (dynamic) address of a memory resident
6471 object, DWARF rules require the register number be referred to as
6472 a "base register". This distinction is not based in any way upon
6473 what category of register the hardware believes the given register
6474 belongs to. This is strictly DWARF terminology we're dealing with
6475 here. Note that in cases where the location of a memory-resident
6476 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6477 OP_CONST (0)) the actual DWARF location descriptor that we generate
6478 may just be OP_BASEREG (basereg). This may look deceptively like
6479 the object in question was allocated to a register (rather than in
6480 memory) so DWARF consumers need to be aware of the subtle
6481 distinction between OP_REG and OP_BASEREG. */
6482 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6486 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6487 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6492 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6493 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6494 mem_loc_result->dw_loc_oprnd1.v.val_addr = addr_to_string (rtl);
6498 if (is_based_loc (rtl))
6499 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6500 INTVAL (XEXP (rtl, 1)));
6503 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6504 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6505 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6510 /* If a pseudo-reg is optimized away, it is possible for it to
6511 be replaced with a MEM containing a multiply. */
6512 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0)));
6513 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1)));
6514 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6518 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6525 return mem_loc_result;
6528 /* Return a descriptor that describes the concatenation of two locations.
6529 This is typically a complex variable. */
6531 static dw_loc_descr_ref
6532 concat_loc_descriptor (x0, x1)
6533 register rtx x0, x1;
6535 dw_loc_descr_ref cc_loc_result = NULL;
6537 if (!is_pseudo_reg (x0)
6538 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6539 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6540 add_loc_descr (&cc_loc_result,
6541 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6543 if (!is_pseudo_reg (x1)
6544 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6545 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6546 add_loc_descr (&cc_loc_result,
6547 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6549 return cc_loc_result;
6552 /* Output a proper Dwarf location descriptor for a variable or parameter
6553 which is either allocated in a register or in a memory location. For a
6554 register, we just generate an OP_REG and the register number. For a
6555 memory location we provide a Dwarf postfix expression describing how to
6556 generate the (dynamic) address of the object onto the address stack. */
6558 static dw_loc_descr_ref
6559 loc_descriptor (rtl)
6562 dw_loc_descr_ref loc_result = NULL;
6563 switch (GET_CODE (rtl))
6566 /* The case of a subreg may arise when we have a local (register)
6567 variable or a formal (register) parameter which doesn't quite fill
6568 up an entire register. For now, just assume that it is
6569 legitimate to make the Dwarf info refer to the whole register which
6570 contains the given subreg. */
6571 rtl = XEXP (rtl, 0);
6573 /* ... fall through ... */
6576 loc_result = reg_loc_descriptor (rtl);
6580 loc_result = mem_loc_descriptor (XEXP (rtl, 0));
6584 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6594 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6595 which is not less than the value itself. */
6597 static inline unsigned
6598 ceiling (value, boundary)
6599 register unsigned value;
6600 register unsigned boundary;
6602 return (((value + boundary - 1) / boundary) * boundary);
6605 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6606 pointer to the declared type for the relevant field variable, or return
6607 `integer_type_node' if the given node turns out to be an
6616 if (TREE_CODE (decl) == ERROR_MARK)
6617 return integer_type_node;
6619 type = DECL_BIT_FIELD_TYPE (decl);
6620 if (type == NULL_TREE)
6621 type = TREE_TYPE (decl);
6626 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6627 node, return the alignment in bits for the type, or else return
6628 BITS_PER_WORD if the node actually turns out to be an
6631 static inline unsigned
6632 simple_type_align_in_bits (type)
6635 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6638 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6639 node, return the size in bits for the type if it is a constant, or else
6640 return the alignment for the type if the type's size is not constant, or
6641 else return BITS_PER_WORD if the type actually turns out to be an
6644 static inline unsigned
6645 simple_type_size_in_bits (type)
6648 if (TREE_CODE (type) == ERROR_MARK)
6649 return BITS_PER_WORD;
6652 register tree type_size_tree = TYPE_SIZE (type);
6654 if (TREE_CODE (type_size_tree) != INTEGER_CST)
6655 return TYPE_ALIGN (type);
6657 return (unsigned) TREE_INT_CST_LOW (type_size_tree);
6661 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6662 return the byte offset of the lowest addressed byte of the "containing
6663 object" for the given FIELD_DECL, or return 0 if we are unable to
6664 determine what that offset is, either because the argument turns out to
6665 be a pointer to an ERROR_MARK node, or because the offset is actually
6666 variable. (We can't handle the latter case just yet). */
6669 field_byte_offset (decl)
6672 register unsigned type_align_in_bytes;
6673 register unsigned type_align_in_bits;
6674 register unsigned type_size_in_bits;
6675 register unsigned object_offset_in_align_units;
6676 register unsigned object_offset_in_bits;
6677 register unsigned object_offset_in_bytes;
6679 register tree bitpos_tree;
6680 register tree field_size_tree;
6681 register unsigned bitpos_int;
6682 register unsigned deepest_bitpos;
6683 register unsigned field_size_in_bits;
6685 if (TREE_CODE (decl) == ERROR_MARK)
6688 if (TREE_CODE (decl) != FIELD_DECL)
6691 type = field_type (decl);
6693 bitpos_tree = DECL_FIELD_BITPOS (decl);
6694 field_size_tree = DECL_SIZE (decl);
6696 /* We cannot yet cope with fields whose positions or sizes are variable, so
6697 for now, when we see such things, we simply return 0. Someday, we may
6698 be able to handle such cases, but it will be damn difficult. */
6699 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
6701 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
6703 if (TREE_CODE (field_size_tree) != INTEGER_CST)
6706 field_size_in_bits = (unsigned) TREE_INT_CST_LOW (field_size_tree);
6707 type_size_in_bits = simple_type_size_in_bits (type);
6708 type_align_in_bits = simple_type_align_in_bits (type);
6709 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6711 /* Note that the GCC front-end doesn't make any attempt to keep track of
6712 the starting bit offset (relative to the start of the containing
6713 structure type) of the hypothetical "containing object" for a bit-
6714 field. Thus, when computing the byte offset value for the start of the
6715 "containing object" of a bit-field, we must deduce this information on
6716 our own. This can be rather tricky to do in some cases. For example,
6717 handling the following structure type definition when compiling for an
6718 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6721 struct S { int field1; long long field2:31; };
6723 Fortunately, there is a simple rule-of-thumb which can be
6724 used in such cases. When compiling for an i386/i486, GCC will allocate
6725 8 bytes for the structure shown above. It decides to do this based upon
6726 one simple rule for bit-field allocation. Quite simply, GCC allocates
6727 each "containing object" for each bit-field at the first (i.e. lowest
6728 addressed) legitimate alignment boundary (based upon the required
6729 minimum alignment for the declared type of the field) which it can
6730 possibly use, subject to the condition that there is still enough
6731 available space remaining in the containing object (when allocated at
6732 the selected point) to fully accommodate all of the bits of the
6733 bit-field itself. This simple rule makes it obvious why GCC allocates
6734 8 bytes for each object of the structure type shown above. When looking
6735 for a place to allocate the "containing object" for `field2', the
6736 compiler simply tries to allocate a 64-bit "containing object" at each
6737 successive 32-bit boundary (starting at zero) until it finds a place to
6738 allocate that 64- bit field such that at least 31 contiguous (and
6739 previously unallocated) bits remain within that selected 64 bit field.
6740 (As it turns out, for the example above, the compiler finds that it is
6741 OK to allocate the "containing object" 64-bit field at bit-offset zero
6742 within the structure type.) Here we attempt to work backwards from the
6743 limited set of facts we're given, and we try to deduce from those facts,
6744 where GCC must have believed that the containing object started (within
6745 the structure type). The value we deduce is then used (by the callers of
6746 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6747 for fields (both bit-fields and, in the case of DW_AT_location, regular
6750 /* Figure out the bit-distance from the start of the structure to the
6751 "deepest" bit of the bit-field. */
6752 deepest_bitpos = bitpos_int + field_size_in_bits;
6754 /* This is the tricky part. Use some fancy footwork to deduce where the
6755 lowest addressed bit of the containing object must be. */
6756 object_offset_in_bits
6757 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6759 /* Compute the offset of the containing object in "alignment units". */
6760 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6762 /* Compute the offset of the containing object in bytes. */
6763 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6765 return object_offset_in_bytes;
6768 /* The following routines define various Dwarf attributes and any data
6769 associated with them. */
6771 /* Add a location description attribute value to a DIE.
6773 This emits location attributes suitable for whole variables and
6774 whole parameters. Note that the location attributes for struct fields are
6775 generated by the routine `data_member_location_attribute' below. */
6778 add_AT_location_description (die, attr_kind, rtl)
6780 enum dwarf_attribute attr_kind;
6783 /* Handle a special case. If we are about to output a location descriptor
6784 for a variable or parameter which has been optimized out of existence,
6785 don't do that. A variable which has been optimized out
6786 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6787 Currently, in some rare cases, variables can have DECL_RTL values which
6788 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6789 elsewhere in the compiler. We treat such cases as if the variable(s) in
6790 question had been optimized out of existence. */
6792 if (is_pseudo_reg (rtl)
6793 || (GET_CODE (rtl) == MEM
6794 && is_pseudo_reg (XEXP (rtl, 0)))
6795 || (GET_CODE (rtl) == CONCAT
6796 && is_pseudo_reg (XEXP (rtl, 0))
6797 && is_pseudo_reg (XEXP (rtl, 1))))
6800 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
6803 /* Attach the specialized form of location attribute used for data
6804 members of struct and union types. In the special case of a
6805 FIELD_DECL node which represents a bit-field, the "offset" part
6806 of this special location descriptor must indicate the distance
6807 in bytes from the lowest-addressed byte of the containing struct
6808 or union type to the lowest-addressed byte of the "containing
6809 object" for the bit-field. (See the `field_byte_offset' function
6810 above).. For any given bit-field, the "containing object" is a
6811 hypothetical object (of some integral or enum type) within which
6812 the given bit-field lives. The type of this hypothetical
6813 "containing object" is always the same as the declared type of
6814 the individual bit-field itself (for GCC anyway... the DWARF
6815 spec doesn't actually mandate this). Note that it is the size
6816 (in bytes) of the hypothetical "containing object" which will
6817 be given in the DW_AT_byte_size attribute for this bit-field.
6818 (See the `byte_size_attribute' function below.) It is also used
6819 when calculating the value of the DW_AT_bit_offset attribute.
6820 (See the `bit_offset_attribute' function below). */
6823 add_data_member_location_attribute (die, decl)
6824 register dw_die_ref die;
6827 register unsigned long offset;
6828 register dw_loc_descr_ref loc_descr;
6829 register enum dwarf_location_atom op;
6831 if (TREE_CODE (decl) == TREE_VEC)
6832 offset = TREE_INT_CST_LOW (BINFO_OFFSET (decl));
6834 offset = field_byte_offset (decl);
6836 /* The DWARF2 standard says that we should assume that the structure address
6837 is already on the stack, so we can specify a structure field address
6838 by using DW_OP_plus_uconst. */
6840 #ifdef MIPS_DEBUGGING_INFO
6841 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6842 correctly. It works only if we leave the offset on the stack. */
6845 op = DW_OP_plus_uconst;
6848 loc_descr = new_loc_descr (op, offset, 0);
6849 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
6852 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6853 does not have a "location" either in memory or in a register. These
6854 things can arise in GNU C when a constant is passed as an actual parameter
6855 to an inlined function. They can also arise in C++ where declared
6856 constants do not necessarily get memory "homes". */
6859 add_const_value_attribute (die, rtl)
6860 register dw_die_ref die;
6863 switch (GET_CODE (rtl))
6866 /* Note that a CONST_INT rtx could represent either an integer or a
6867 floating-point constant. A CONST_INT is used whenever the constant
6868 will fit into a single word. In all such cases, the original mode
6869 of the constant value is wiped out, and the CONST_INT rtx is
6870 assigned VOIDmode. */
6871 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
6875 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6876 floating-point constant. A CONST_DOUBLE is used whenever the
6877 constant requires more than one word in order to be adequately
6878 represented. We output CONST_DOUBLEs as blocks. */
6880 register enum machine_mode mode = GET_MODE (rtl);
6882 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
6884 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
6888 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
6892 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
6896 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
6901 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
6908 add_AT_float (die, DW_AT_const_value, length, array);
6911 add_AT_long_long (die, DW_AT_const_value,
6912 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
6917 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
6923 add_AT_addr (die, DW_AT_const_value, addr_to_string (rtl));
6927 /* In cases where an inlined instance of an inline function is passed
6928 the address of an `auto' variable (which is local to the caller) we
6929 can get a situation where the DECL_RTL of the artificial local
6930 variable (for the inlining) which acts as a stand-in for the
6931 corresponding formal parameter (of the inline function) will look
6932 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6933 exactly a compile-time constant expression, but it isn't the address
6934 of the (artificial) local variable either. Rather, it represents the
6935 *value* which the artificial local variable always has during its
6936 lifetime. We currently have no way to represent such quasi-constant
6937 values in Dwarf, so for now we just punt and generate nothing. */
6941 /* No other kinds of rtx should be possible here. */
6947 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6948 data attribute for a variable or a parameter. We generate the
6949 DW_AT_const_value attribute only in those cases where the given variable
6950 or parameter does not have a true "location" either in memory or in a
6951 register. This can happen (for example) when a constant is passed as an
6952 actual argument in a call to an inline function. (It's possible that
6953 these things can crop up in other ways also.) Note that one type of
6954 constant value which can be passed into an inlined function is a constant
6955 pointer. This can happen for example if an actual argument in an inlined
6956 function call evaluates to a compile-time constant address. */
6959 add_location_or_const_value_attribute (die, decl)
6960 register dw_die_ref die;
6964 register tree declared_type;
6965 register tree passed_type;
6967 if (TREE_CODE (decl) == ERROR_MARK)
6970 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
6973 /* Here we have to decide where we are going to say the parameter "lives"
6974 (as far as the debugger is concerned). We only have a couple of
6975 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6977 DECL_RTL normally indicates where the parameter lives during most of the
6978 activation of the function. If optimization is enabled however, this
6979 could be either NULL or else a pseudo-reg. Both of those cases indicate
6980 that the parameter doesn't really live anywhere (as far as the code
6981 generation parts of GCC are concerned) during most of the function's
6982 activation. That will happen (for example) if the parameter is never
6983 referenced within the function.
6985 We could just generate a location descriptor here for all non-NULL
6986 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6987 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6988 where DECL_RTL is NULL or is a pseudo-reg.
6990 Note however that we can only get away with using DECL_INCOMING_RTL as
6991 a backup substitute for DECL_RTL in certain limited cases. In cases
6992 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
6993 we can be sure that the parameter was passed using the same type as it is
6994 declared to have within the function, and that its DECL_INCOMING_RTL
6995 points us to a place where a value of that type is passed.
6997 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
6998 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
6999 because in these cases DECL_INCOMING_RTL points us to a value of some
7000 type which is *different* from the type of the parameter itself. Thus,
7001 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7002 such cases, the debugger would end up (for example) trying to fetch a
7003 `float' from a place which actually contains the first part of a
7004 `double'. That would lead to really incorrect and confusing
7005 output at debug-time.
7007 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7008 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7009 are a couple of exceptions however. On little-endian machines we can
7010 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7011 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7012 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7013 when (on a little-endian machine) a non-prototyped function has a
7014 parameter declared to be of type `short' or `char'. In such cases,
7015 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7016 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7017 passed `int' value. If the debugger then uses that address to fetch
7018 a `short' or a `char' (on a little-endian machine) the result will be
7019 the correct data, so we allow for such exceptional cases below.
7021 Note that our goal here is to describe the place where the given formal
7022 parameter lives during most of the function's activation (i.e. between
7023 the end of the prologue and the start of the epilogue). We'll do that
7024 as best as we can. Note however that if the given formal parameter is
7025 modified sometime during the execution of the function, then a stack
7026 backtrace (at debug-time) will show the function as having been
7027 called with the *new* value rather than the value which was
7028 originally passed in. This happens rarely enough that it is not
7029 a major problem, but it *is* a problem, and I'd like to fix it.
7031 A future version of dwarf2out.c may generate two additional
7032 attributes for any given DW_TAG_formal_parameter DIE which will
7033 describe the "passed type" and the "passed location" for the
7034 given formal parameter in addition to the attributes we now
7035 generate to indicate the "declared type" and the "active
7036 location" for each parameter. This additional set of attributes
7037 could be used by debuggers for stack backtraces. Separately, note
7038 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7039 NULL also. This happens (for example) for inlined-instances of
7040 inline function formal parameters which are never referenced.
7041 This really shouldn't be happening. All PARM_DECL nodes should
7042 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7043 doesn't currently generate these values for inlined instances of
7044 inline function parameters, so when we see such cases, we are
7045 just out-of-luck for the time being (until integrate.c
7048 /* Use DECL_RTL as the "location" unless we find something better. */
7049 rtl = DECL_RTL (decl);
7051 if (TREE_CODE (decl) == PARM_DECL)
7053 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7055 declared_type = type_main_variant (TREE_TYPE (decl));
7056 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7058 /* This decl represents a formal parameter which was optimized out.
7059 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7060 all* cases where (rtl == NULL_RTX) just below. */
7061 if (declared_type == passed_type)
7062 rtl = DECL_INCOMING_RTL (decl);
7063 else if (! BYTES_BIG_ENDIAN
7064 && TREE_CODE (declared_type) == INTEGER_TYPE
7065 && TYPE_SIZE (declared_type) <= TYPE_SIZE (passed_type))
7066 rtl = DECL_INCOMING_RTL (decl);
7070 if (rtl == NULL_RTX)
7073 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7074 #ifdef LEAF_REG_REMAP
7076 leaf_renumber_regs_insn (rtl);
7079 switch (GET_CODE (rtl))
7082 /* The address of a variable that was optimized away; don't emit
7093 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7094 add_const_value_attribute (die, rtl);
7101 add_AT_location_description (die, DW_AT_location, rtl);
7109 /* Generate an DW_AT_name attribute given some string value to be included as
7110 the value of the attribute. */
7113 add_name_attribute (die, name_string)
7114 register dw_die_ref die;
7115 register char *name_string;
7117 if (name_string != NULL && *name_string != 0)
7118 add_AT_string (die, DW_AT_name, name_string);
7121 /* Given a tree node describing an array bound (either lower or upper) output
7122 a representation for that bound. */
7125 add_bound_info (subrange_die, bound_attr, bound)
7126 register dw_die_ref subrange_die;
7127 register enum dwarf_attribute bound_attr;
7128 register tree bound;
7130 register unsigned bound_value = 0;
7132 /* If this is an Ada unconstrained array type, then don't emit any debug
7133 info because the array bounds are unknown. They are parameterized when
7134 the type is instantiated. */
7135 if (contains_placeholder_p (bound))
7138 switch (TREE_CODE (bound))
7143 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7145 bound_value = TREE_INT_CST_LOW (bound);
7146 if (bound_attr == DW_AT_lower_bound
7147 && ((is_c_family () && bound_value == 0)
7148 || (is_fortran () && bound_value == 1)))
7149 /* use the default */;
7151 add_AT_unsigned (subrange_die, bound_attr, bound_value);
7156 case NON_LVALUE_EXPR:
7157 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7161 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7162 access the upper bound values may be bogus. If they refer to a
7163 register, they may only describe how to get at these values at the
7164 points in the generated code right after they have just been
7165 computed. Worse yet, in the typical case, the upper bound values
7166 will not even *be* computed in the optimized code (though the
7167 number of elements will), so these SAVE_EXPRs are entirely
7168 bogus. In order to compensate for this fact, we check here to see
7169 if optimization is enabled, and if so, we don't add an attribute
7170 for the (unknown and unknowable) upper bound. This should not
7171 cause too much trouble for existing (stupid?) debuggers because
7172 they have to deal with empty upper bounds location descriptions
7173 anyway in order to be able to deal with incomplete array types.
7174 Of course an intelligent debugger (GDB?) should be able to
7175 comprehend that a missing upper bound specification in a array
7176 type used for a storage class `auto' local array variable
7177 indicates that the upper bound is both unknown (at compile- time)
7178 and unknowable (at run-time) due to optimization.
7180 We assume that a MEM rtx is safe because gcc wouldn't put the
7181 value there unless it was going to be used repeatedly in the
7182 function, i.e. for cleanups. */
7183 if (! optimize || GET_CODE (SAVE_EXPR_RTL (bound)) == MEM)
7185 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7186 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7187 register rtx loc = SAVE_EXPR_RTL (bound);
7189 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7190 it references an outer function's frame. */
7192 if (GET_CODE (loc) == MEM)
7194 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7196 if (XEXP (loc, 0) != new_addr)
7197 loc = gen_rtx (MEM, GET_MODE (loc), new_addr);
7200 add_AT_flag (decl_die, DW_AT_artificial, 1);
7201 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7202 add_AT_location_description (decl_die, DW_AT_location, loc);
7203 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7206 /* Else leave out the attribute. */
7212 /* ??? These types of bounds can be created by the Ada front end,
7213 and it isn't clear how to emit debug info for them. */
7221 /* Note that the block of subscript information for an array type also
7222 includes information about the element type of type given array type. */
7225 add_subscript_info (type_die, type)
7226 register dw_die_ref type_die;
7229 #ifndef MIPS_DEBUGGING_INFO
7230 register unsigned dimension_number;
7232 register tree lower, upper;
7233 register dw_die_ref subrange_die;
7235 /* The GNU compilers represent multidimensional array types as sequences of
7236 one dimensional array types whose element types are themselves array
7237 types. Here we squish that down, so that each multidimensional array
7238 type gets only one array_type DIE in the Dwarf debugging info. The draft
7239 Dwarf specification say that we are allowed to do this kind of
7240 compression in C (because there is no difference between an array or
7241 arrays and a multidimensional array in C) but for other source languages
7242 (e.g. Ada) we probably shouldn't do this. */
7244 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7245 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7246 We work around this by disabling this feature. See also
7247 gen_array_type_die. */
7248 #ifndef MIPS_DEBUGGING_INFO
7249 for (dimension_number = 0;
7250 TREE_CODE (type) == ARRAY_TYPE;
7251 type = TREE_TYPE (type), dimension_number++)
7254 register tree domain = TYPE_DOMAIN (type);
7256 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7257 and (in GNU C only) variable bounds. Handle all three forms
7259 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7262 /* We have an array type with specified bounds. */
7263 lower = TYPE_MIN_VALUE (domain);
7264 upper = TYPE_MAX_VALUE (domain);
7266 /* define the index type. */
7267 if (TREE_TYPE (domain))
7269 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7270 TREE_TYPE field. We can't emit debug info for this
7271 because it is an unnamed integral type. */
7272 if (TREE_CODE (domain) == INTEGER_TYPE
7273 && TYPE_NAME (domain) == NULL_TREE
7274 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7275 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7278 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7282 /* ??? If upper is NULL, the array has unspecified length,
7283 but it does have a lower bound. This happens with Fortran
7285 Since the debugger is definitely going to need to know N
7286 to produce useful results, go ahead and output the lower
7287 bound solo, and hope the debugger can cope. */
7289 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7291 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7294 /* We have an array type with an unspecified length. The DWARF-2
7295 spec does not say how to handle this; let's just leave out the
7300 #ifndef MIPS_DEBUGGING_INFO
7306 add_byte_size_attribute (die, tree_node)
7308 register tree tree_node;
7310 register unsigned size;
7312 switch (TREE_CODE (tree_node))
7320 case QUAL_UNION_TYPE:
7321 size = int_size_in_bytes (tree_node);
7324 /* For a data member of a struct or union, the DW_AT_byte_size is
7325 generally given as the number of bytes normally allocated for an
7326 object of the *declared* type of the member itself. This is true
7327 even for bit-fields. */
7328 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7334 /* Note that `size' might be -1 when we get to this point. If it is, that
7335 indicates that the byte size of the entity in question is variable. We
7336 have no good way of expressing this fact in Dwarf at the present time,
7337 so just let the -1 pass on through. */
7339 add_AT_unsigned (die, DW_AT_byte_size, size);
7342 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7343 which specifies the distance in bits from the highest order bit of the
7344 "containing object" for the bit-field to the highest order bit of the
7347 For any given bit-field, the "containing object" is a hypothetical
7348 object (of some integral or enum type) within which the given bit-field
7349 lives. The type of this hypothetical "containing object" is always the
7350 same as the declared type of the individual bit-field itself. The
7351 determination of the exact location of the "containing object" for a
7352 bit-field is rather complicated. It's handled by the
7353 `field_byte_offset' function (above).
7355 Note that it is the size (in bytes) of the hypothetical "containing object"
7356 which will be given in the DW_AT_byte_size attribute for this bit-field.
7357 (See `byte_size_attribute' above). */
7360 add_bit_offset_attribute (die, decl)
7361 register dw_die_ref die;
7364 register unsigned object_offset_in_bytes = field_byte_offset (decl);
7365 register tree type = DECL_BIT_FIELD_TYPE (decl);
7366 register tree bitpos_tree = DECL_FIELD_BITPOS (decl);
7367 register unsigned bitpos_int;
7368 register unsigned highest_order_object_bit_offset;
7369 register unsigned highest_order_field_bit_offset;
7370 register unsigned bit_offset;
7372 /* Must be a field and a bit field. */
7374 || TREE_CODE (decl) != FIELD_DECL)
7377 /* We can't yet handle bit-fields whose offsets are variable, so if we
7378 encounter such things, just return without generating any attribute
7380 if (TREE_CODE (bitpos_tree) != INTEGER_CST)
7383 bitpos_int = (unsigned) TREE_INT_CST_LOW (bitpos_tree);
7385 /* Note that the bit offset is always the distance (in bits) from the
7386 highest-order bit of the "containing object" to the highest-order bit of
7387 the bit-field itself. Since the "high-order end" of any object or field
7388 is different on big-endian and little-endian machines, the computation
7389 below must take account of these differences. */
7390 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7391 highest_order_field_bit_offset = bitpos_int;
7393 if (! BYTES_BIG_ENDIAN)
7395 highest_order_field_bit_offset
7396 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl));
7398 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7402 = (! BYTES_BIG_ENDIAN
7403 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7404 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7406 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7409 /* For a FIELD_DECL node which represents a bit field, output an attribute
7410 which specifies the length in bits of the given field. */
7413 add_bit_size_attribute (die, decl)
7414 register dw_die_ref die;
7417 /* Must be a field and a bit field. */
7418 if (TREE_CODE (decl) != FIELD_DECL
7419 || ! DECL_BIT_FIELD_TYPE (decl))
7421 add_AT_unsigned (die, DW_AT_bit_size,
7422 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl)));
7425 /* If the compiled language is ANSI C, then add a 'prototyped'
7426 attribute, if arg types are given for the parameters of a function. */
7429 add_prototyped_attribute (die, func_type)
7430 register dw_die_ref die;
7431 register tree func_type;
7433 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7434 && TYPE_ARG_TYPES (func_type) != NULL)
7435 add_AT_flag (die, DW_AT_prototyped, 1);
7439 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7440 by looking in either the type declaration or object declaration
7444 add_abstract_origin_attribute (die, origin)
7445 register dw_die_ref die;
7446 register tree origin;
7448 dw_die_ref origin_die = NULL;
7449 if (TREE_CODE_CLASS (TREE_CODE (origin)) == 'd')
7450 origin_die = lookup_decl_die (origin);
7451 else if (TREE_CODE_CLASS (TREE_CODE (origin)) == 't')
7452 origin_die = lookup_type_die (origin);
7454 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7457 /* We do not currently support the pure_virtual attribute. */
7460 add_pure_or_virtual_attribute (die, func_decl)
7461 register dw_die_ref die;
7462 register tree func_decl;
7464 if (DECL_VINDEX (func_decl))
7466 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7467 add_AT_loc (die, DW_AT_vtable_elem_location,
7468 new_loc_descr (DW_OP_constu,
7469 TREE_INT_CST_LOW (DECL_VINDEX (func_decl)),
7472 /* GNU extension: Record what type this method came from originally. */
7473 if (debug_info_level > DINFO_LEVEL_TERSE)
7474 add_AT_die_ref (die, DW_AT_containing_type,
7475 lookup_type_die (DECL_CONTEXT (func_decl)));
7479 /* Add source coordinate attributes for the given decl. */
7482 add_src_coords_attributes (die, decl)
7483 register dw_die_ref die;
7486 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7488 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7489 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7492 /* Add an DW_AT_name attribute and source coordinate attribute for the
7493 given decl, but only if it actually has a name. */
7496 add_name_and_src_coords_attributes (die, decl)
7497 register dw_die_ref die;
7500 register tree decl_name;
7502 decl_name = DECL_NAME (decl);
7503 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7505 add_name_attribute (die, dwarf2_name (decl, 0));
7506 add_src_coords_attributes (die, decl);
7507 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7508 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7509 add_AT_string (die, DW_AT_MIPS_linkage_name,
7510 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7514 /* Push a new declaration scope. */
7517 push_decl_scope (scope)
7520 tree containing_scope;
7523 /* Make room in the decl_scope_table, if necessary. */
7524 if (decl_scope_table_allocated == decl_scope_depth)
7526 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7528 = (decl_scope_node *) xrealloc (decl_scope_table,
7529 (decl_scope_table_allocated
7530 * sizeof (decl_scope_node)));
7533 decl_scope_table[decl_scope_depth].scope = scope;
7535 /* Sometimes, while recursively emitting subtypes within a class type,
7536 we end up recuring on a subtype at a higher level then the current
7537 subtype. In such a case, we need to search the decl_scope_table to
7538 find the parent of this subtype. */
7540 if (TREE_CODE_CLASS (TREE_CODE (scope)) == 't')
7541 containing_scope = TYPE_CONTEXT (scope);
7543 containing_scope = NULL_TREE;
7545 /* The normal case. */
7546 if (decl_scope_depth == 0
7547 || containing_scope == NULL_TREE
7548 /* Ignore namespaces for the moment. */
7549 || TREE_CODE (containing_scope) == NAMESPACE_DECL
7550 || containing_scope == decl_scope_table[decl_scope_depth - 1].scope)
7551 decl_scope_table[decl_scope_depth].previous = decl_scope_depth - 1;
7554 /* We need to search for the containing_scope. */
7555 for (i = 0; i < decl_scope_depth; i++)
7556 if (decl_scope_table[i].scope == containing_scope)
7559 if (i == decl_scope_depth)
7562 decl_scope_table[decl_scope_depth].previous = i;
7568 /* Return the DIE for the scope that immediately contains this declaration. */
7571 scope_die_for (t, context_die)
7573 register dw_die_ref context_die;
7575 register dw_die_ref scope_die = NULL;
7576 register tree containing_scope;
7579 /* Walk back up the declaration tree looking for a place to define
7581 if (TREE_CODE_CLASS (TREE_CODE (t)) == 't')
7582 containing_scope = TYPE_CONTEXT (t);
7583 else if (TREE_CODE (t) == FUNCTION_DECL && DECL_VINDEX (t))
7584 containing_scope = decl_class_context (t);
7586 containing_scope = DECL_CONTEXT (t);
7588 /* Ignore namespaces for the moment. */
7589 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7590 containing_scope = NULL_TREE;
7592 /* Function-local tags and functions get stuck in limbo until they are
7593 fixed up by decls_for_scope. */
7594 if (context_die == NULL && containing_scope != NULL_TREE
7595 && (TREE_CODE (t) == FUNCTION_DECL || is_tagged_type (t)))
7598 if (containing_scope == NULL_TREE)
7599 scope_die = comp_unit_die;
7602 for (i = decl_scope_depth - 1, scope_die = context_die;
7603 i >= 0 && decl_scope_table[i].scope != containing_scope;
7604 (scope_die = scope_die->die_parent,
7605 i = decl_scope_table[i].previous))
7608 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7609 does it try to handle types defined by TYPE_DECLs. Such types
7610 thus have an incorrect TYPE_CONTEXT, which points to the block
7611 they were originally defined in, instead of the current block
7612 created by function inlining. We try to detect that here and
7615 if (i < 0 && scope_die == comp_unit_die
7616 && TREE_CODE (containing_scope) == BLOCK
7617 && is_tagged_type (t)
7618 && (block_ultimate_origin (decl_scope_table[decl_scope_depth - 1].scope)
7619 == containing_scope))
7621 scope_die = context_die;
7622 /* Since the checks below are no longer applicable. */
7628 if (scope_die != comp_unit_die
7629 || TREE_CODE_CLASS (TREE_CODE (containing_scope)) != 't')
7631 if (debug_info_level > DINFO_LEVEL_TERSE
7632 && !TREE_ASM_WRITTEN (containing_scope))
7640 /* Pop a declaration scope. */
7644 if (decl_scope_depth <= 0)
7649 /* Many forms of DIEs require a "type description" attribute. This
7650 routine locates the proper "type descriptor" die for the type given
7651 by 'type', and adds an DW_AT_type attribute below the given die. */
7654 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7655 register dw_die_ref object_die;
7657 register int decl_const;
7658 register int decl_volatile;
7659 register dw_die_ref context_die;
7661 register enum tree_code code = TREE_CODE (type);
7662 register dw_die_ref type_die = NULL;
7664 /* ??? If this type is an unnamed subrange type of an integral or
7665 floating-point type, use the inner type. This is because we have no
7666 support for unnamed types in base_type_die. This can happen if this is
7667 an Ada subrange type. Correct solution is emit a subrange type die. */
7668 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7669 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7670 type = TREE_TYPE (type), code = TREE_CODE (type);
7672 if (code == ERROR_MARK)
7675 /* Handle a special case. For functions whose return type is void, we
7676 generate *no* type attribute. (Note that no object may have type
7677 `void', so this only applies to function return types). */
7678 if (code == VOID_TYPE)
7681 type_die = modified_type_die (type,
7682 decl_const || TYPE_READONLY (type),
7683 decl_volatile || TYPE_VOLATILE (type),
7685 if (type_die != NULL)
7686 add_AT_die_ref (object_die, DW_AT_type, type_die);
7689 /* Given a tree pointer to a struct, class, union, or enum type node, return
7690 a pointer to the (string) tag name for the given type, or zero if the type
7691 was declared without a tag. */
7697 register char *name = 0;
7699 if (TYPE_NAME (type) != 0)
7701 register tree t = 0;
7703 /* Find the IDENTIFIER_NODE for the type name. */
7704 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7705 t = TYPE_NAME (type);
7707 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7708 a TYPE_DECL node, regardless of whether or not a `typedef' was
7710 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7711 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7712 t = DECL_NAME (TYPE_NAME (type));
7714 /* Now get the name as a string, or invent one. */
7716 name = IDENTIFIER_POINTER (t);
7719 return (name == 0 || *name == '\0') ? 0 : name;
7722 /* Return the type associated with a data member, make a special check
7723 for bit field types. */
7726 member_declared_type (member)
7727 register tree member;
7729 return (DECL_BIT_FIELD_TYPE (member)
7730 ? DECL_BIT_FIELD_TYPE (member)
7731 : TREE_TYPE (member));
7734 /* Get the decl's label, as described by its RTL. This may be different
7735 from the DECL_NAME name used in the source file. */
7739 decl_start_label (decl)
7744 x = DECL_RTL (decl);
7745 if (GET_CODE (x) != MEM)
7749 if (GET_CODE (x) != SYMBOL_REF)
7752 fnname = XSTR (x, 0);
7757 /* These routines generate the internal representation of the DIE's for
7758 the compilation unit. Debugging information is collected by walking
7759 the declaration trees passed in from dwarf2out_decl(). */
7762 gen_array_type_die (type, context_die)
7764 register dw_die_ref context_die;
7766 register dw_die_ref scope_die = scope_die_for (type, context_die);
7767 register dw_die_ref array_die;
7768 register tree element_type;
7770 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7771 the inner array type comes before the outer array type. Thus we must
7772 call gen_type_die before we call new_die. See below also. */
7773 #ifdef MIPS_DEBUGGING_INFO
7774 gen_type_die (TREE_TYPE (type), context_die);
7777 array_die = new_die (DW_TAG_array_type, scope_die);
7780 /* We default the array ordering. SDB will probably do
7781 the right things even if DW_AT_ordering is not present. It's not even
7782 an issue until we start to get into multidimensional arrays anyway. If
7783 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7784 then we'll have to put the DW_AT_ordering attribute back in. (But if
7785 and when we find out that we need to put these in, we will only do so
7786 for multidimensional arrays. */
7787 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
7790 #ifdef MIPS_DEBUGGING_INFO
7791 /* The SGI compilers handle arrays of unknown bound by setting
7792 AT_declaration and not emitting any subrange DIEs. */
7793 if (! TYPE_DOMAIN (type))
7794 add_AT_unsigned (array_die, DW_AT_declaration, 1);
7797 add_subscript_info (array_die, type);
7799 equate_type_number_to_die (type, array_die);
7801 /* Add representation of the type of the elements of this array type. */
7802 element_type = TREE_TYPE (type);
7804 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7805 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7806 We work around this by disabling this feature. See also
7807 add_subscript_info. */
7808 #ifndef MIPS_DEBUGGING_INFO
7809 while (TREE_CODE (element_type) == ARRAY_TYPE)
7810 element_type = TREE_TYPE (element_type);
7812 gen_type_die (element_type, context_die);
7815 add_type_attribute (array_die, element_type, 0, 0, context_die);
7819 gen_set_type_die (type, context_die)
7821 register dw_die_ref context_die;
7823 register dw_die_ref type_die
7824 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
7826 equate_type_number_to_die (type, type_die);
7827 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
7832 gen_entry_point_die (decl, context_die)
7834 register dw_die_ref context_die;
7836 register tree origin = decl_ultimate_origin (decl);
7837 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
7839 add_abstract_origin_attribute (decl_die, origin);
7842 add_name_and_src_coords_attributes (decl_die, decl);
7843 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
7847 if (DECL_ABSTRACT (decl))
7848 equate_decl_number_to_die (decl, decl_die);
7850 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
7854 /* Remember a type in the pending_types_list. */
7860 if (pending_types == pending_types_allocated)
7862 pending_types_allocated += PENDING_TYPES_INCREMENT;
7864 = (tree *) xrealloc (pending_types_list,
7865 sizeof (tree) * pending_types_allocated);
7868 pending_types_list[pending_types++] = type;
7871 /* Output any pending types (from the pending_types list) which we can output
7872 now (taking into account the scope that we are working on now).
7874 For each type output, remove the given type from the pending_types_list
7875 *before* we try to output it. */
7878 output_pending_types_for_scope (context_die)
7879 register dw_die_ref context_die;
7883 while (pending_types)
7886 type = pending_types_list[pending_types];
7887 gen_type_die (type, context_die);
7888 if (!TREE_ASM_WRITTEN (type))
7893 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7896 gen_inlined_enumeration_type_die (type, context_die)
7898 register dw_die_ref context_die;
7900 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
7901 scope_die_for (type, context_die));
7903 if (!TREE_ASM_WRITTEN (type))
7905 add_abstract_origin_attribute (type_die, type);
7908 /* Generate a DIE to represent an inlined instance of a structure type. */
7911 gen_inlined_structure_type_die (type, context_die)
7913 register dw_die_ref context_die;
7915 register dw_die_ref type_die = new_die (DW_TAG_structure_type,
7916 scope_die_for (type, context_die));
7918 if (!TREE_ASM_WRITTEN (type))
7920 add_abstract_origin_attribute (type_die, type);
7923 /* Generate a DIE to represent an inlined instance of a union type. */
7926 gen_inlined_union_type_die (type, context_die)
7928 register dw_die_ref context_die;
7930 register dw_die_ref type_die = new_die (DW_TAG_union_type,
7931 scope_die_for (type, context_die));
7933 if (!TREE_ASM_WRITTEN (type))
7935 add_abstract_origin_attribute (type_die, type);
7938 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7939 include all of the information about the enumeration values also. Each
7940 enumerated type name/value is listed as a child of the enumerated type
7944 gen_enumeration_type_die (type, context_die)
7946 register dw_die_ref context_die;
7948 register dw_die_ref type_die = lookup_type_die (type);
7950 if (type_die == NULL)
7952 type_die = new_die (DW_TAG_enumeration_type,
7953 scope_die_for (type, context_die));
7954 equate_type_number_to_die (type, type_die);
7955 add_name_attribute (type_die, type_tag (type));
7957 else if (! TYPE_SIZE (type))
7960 remove_AT (type_die, DW_AT_declaration);
7962 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7963 given enum type is incomplete, do not generate the DW_AT_byte_size
7964 attribute or the DW_AT_element_list attribute. */
7965 if (TYPE_SIZE (type))
7969 TREE_ASM_WRITTEN (type) = 1;
7970 add_byte_size_attribute (type_die, type);
7971 if (TYPE_STUB_DECL (type) != NULL_TREE)
7972 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
7974 /* If the first reference to this type was as the return type of an
7975 inline function, then it may not have a parent. Fix this now. */
7976 if (type_die->die_parent == NULL)
7977 add_child_die (scope_die_for (type, context_die), type_die);
7979 for (link = TYPE_FIELDS (type);
7980 link != NULL; link = TREE_CHAIN (link))
7982 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
7984 add_name_attribute (enum_die,
7985 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
7986 add_AT_unsigned (enum_die, DW_AT_const_value,
7987 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link)));
7991 add_AT_flag (type_die, DW_AT_declaration, 1);
7995 /* Generate a DIE to represent either a real live formal parameter decl or to
7996 represent just the type of some formal parameter position in some function
7999 Note that this routine is a bit unusual because its argument may be a
8000 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8001 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8002 node. If it's the former then this function is being called to output a
8003 DIE to represent a formal parameter object (or some inlining thereof). If
8004 it's the latter, then this function is only being called to output a
8005 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8006 argument type of some subprogram type. */
8009 gen_formal_parameter_die (node, context_die)
8011 register dw_die_ref context_die;
8013 register dw_die_ref parm_die
8014 = new_die (DW_TAG_formal_parameter, context_die);
8015 register tree origin;
8017 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8020 origin = decl_ultimate_origin (node);
8022 add_abstract_origin_attribute (parm_die, origin);
8025 add_name_and_src_coords_attributes (parm_die, node);
8026 add_type_attribute (parm_die, TREE_TYPE (node),
8027 TREE_READONLY (node),
8028 TREE_THIS_VOLATILE (node),
8030 if (DECL_ARTIFICIAL (node))
8031 add_AT_flag (parm_die, DW_AT_artificial, 1);
8034 equate_decl_number_to_die (node, parm_die);
8035 if (! DECL_ABSTRACT (node))
8036 add_location_or_const_value_attribute (parm_die, node);
8041 /* We were called with some kind of a ..._TYPE node. */
8042 add_type_attribute (parm_die, node, 0, 0, context_die);
8052 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8053 at the end of an (ANSI prototyped) formal parameters list. */
8056 gen_unspecified_parameters_die (decl_or_type, context_die)
8057 register tree decl_or_type;
8058 register dw_die_ref context_die;
8060 new_die (DW_TAG_unspecified_parameters, context_die);
8063 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8064 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8065 parameters as specified in some function type specification (except for
8066 those which appear as part of a function *definition*).
8068 Note we must be careful here to output all of the parameter DIEs before*
8069 we output any DIEs needed to represent the types of the formal parameters.
8070 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8071 non-parameter DIE it sees ends the formal parameter list. */
8074 gen_formal_types_die (function_or_method_type, context_die)
8075 register tree function_or_method_type;
8076 register dw_die_ref context_die;
8079 register tree formal_type = NULL;
8080 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8083 /* In the case where we are generating a formal types list for a C++
8084 non-static member function type, skip over the first thing on the
8085 TYPE_ARG_TYPES list because it only represents the type of the hidden
8086 `this pointer'. The debugger should be able to figure out (without
8087 being explicitly told) that this non-static member function type takes a
8088 `this pointer' and should be able to figure what the type of that hidden
8089 parameter is from the DW_AT_member attribute of the parent
8090 DW_TAG_subroutine_type DIE. */
8091 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8092 first_parm_type = TREE_CHAIN (first_parm_type);
8095 /* Make our first pass over the list of formal parameter types and output a
8096 DW_TAG_formal_parameter DIE for each one. */
8097 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8099 register dw_die_ref parm_die;
8101 formal_type = TREE_VALUE (link);
8102 if (formal_type == void_type_node)
8105 /* Output a (nameless) DIE to represent the formal parameter itself. */
8106 parm_die = gen_formal_parameter_die (formal_type, context_die);
8107 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8108 && link == first_parm_type)
8109 add_AT_flag (parm_die, DW_AT_artificial, 1);
8112 /* If this function type has an ellipsis, add a
8113 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8114 if (formal_type != void_type_node)
8115 gen_unspecified_parameters_die (function_or_method_type, context_die);
8117 /* Make our second (and final) pass over the list of formal parameter types
8118 and output DIEs to represent those types (as necessary). */
8119 for (link = TYPE_ARG_TYPES (function_or_method_type);
8121 link = TREE_CHAIN (link))
8123 formal_type = TREE_VALUE (link);
8124 if (formal_type == void_type_node)
8127 gen_type_die (formal_type, context_die);
8131 /* Generate a DIE to represent a declared function (either file-scope or
8135 gen_subprogram_die (decl, context_die)
8137 register dw_die_ref context_die;
8139 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8140 register tree origin = decl_ultimate_origin (decl);
8141 register dw_die_ref subr_die;
8142 register rtx fp_reg;
8143 register tree fn_arg_types;
8144 register tree outer_scope;
8145 register dw_die_ref old_die = lookup_decl_die (decl);
8146 register int declaration
8147 = (current_function_decl != decl
8149 && (context_die->die_tag == DW_TAG_structure_type
8150 || context_die->die_tag == DW_TAG_union_type)));
8154 subr_die = new_die (DW_TAG_subprogram, context_die);
8155 add_abstract_origin_attribute (subr_die, origin);
8157 else if (old_die && DECL_ABSTRACT (decl)
8158 && get_AT_unsigned (old_die, DW_AT_inline))
8160 /* This must be a redefinition of an extern inline function.
8161 We can just reuse the old die here. */
8164 /* Clear out the inlined attribute and parm types. */
8165 remove_AT (subr_die, DW_AT_inline);
8166 remove_children (subr_die);
8170 register unsigned file_index
8171 = lookup_filename (DECL_SOURCE_FILE (decl));
8173 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8176 /* If the definition comes from the same place as the declaration,
8177 maybe use the old DIE. We always want the DIE for this function
8178 that has the *_pc attributes to be under comp_unit_die so the
8179 debugger can find it. For inlines, that is the concrete instance,
8180 so we can use the old DIE here. For non-inline methods, we want a
8181 specification DIE at toplevel, so we need a new DIE. For local
8182 class methods, this does not apply. */
8183 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8184 || context_die == NULL)
8185 && get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8186 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8187 == DECL_SOURCE_LINE (decl)))
8191 /* Clear out the declaration attribute and the parm types. */
8192 remove_AT (subr_die, DW_AT_declaration);
8193 remove_children (subr_die);
8197 subr_die = new_die (DW_TAG_subprogram, context_die);
8198 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8199 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8200 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8201 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8202 != DECL_SOURCE_LINE (decl))
8204 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8209 register dw_die_ref scope_die;
8211 if (DECL_CONTEXT (decl))
8212 scope_die = scope_die_for (decl, context_die);
8214 /* Don't put block extern declarations under comp_unit_die. */
8215 scope_die = context_die;
8217 subr_die = new_die (DW_TAG_subprogram, scope_die);
8219 if (TREE_PUBLIC (decl))
8220 add_AT_flag (subr_die, DW_AT_external, 1);
8222 add_name_and_src_coords_attributes (subr_die, decl);
8223 if (debug_info_level > DINFO_LEVEL_TERSE)
8225 register tree type = TREE_TYPE (decl);
8227 add_prototyped_attribute (subr_die, type);
8228 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8231 add_pure_or_virtual_attribute (subr_die, decl);
8232 if (DECL_ARTIFICIAL (decl))
8233 add_AT_flag (subr_die, DW_AT_artificial, 1);
8234 if (TREE_PROTECTED (decl))
8235 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8236 else if (TREE_PRIVATE (decl))
8237 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8242 add_AT_flag (subr_die, DW_AT_declaration, 1);
8244 /* The first time we see a member function, it is in the context of
8245 the class to which it belongs. We make sure of this by emitting
8246 the class first. The next time is the definition, which is
8247 handled above. The two may come from the same source text. */
8248 if (DECL_CONTEXT (decl))
8249 equate_decl_number_to_die (decl, subr_die);
8251 else if (DECL_ABSTRACT (decl))
8253 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8254 but not for extern inline functions. We can't get this completely
8255 correct because information about whether the function was declared
8256 inline is not saved anywhere. */
8257 if (DECL_DEFER_OUTPUT (decl))
8259 if (DECL_INLINE (decl))
8260 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8262 add_AT_unsigned (subr_die, DW_AT_inline,
8263 DW_INL_declared_not_inlined);
8265 else if (DECL_INLINE (decl))
8266 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8270 equate_decl_number_to_die (decl, subr_die);
8272 else if (!DECL_EXTERNAL (decl))
8274 if (origin == NULL_TREE)
8275 equate_decl_number_to_die (decl, subr_die);
8277 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8278 current_funcdef_number);
8279 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8280 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8281 current_funcdef_number);
8282 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8284 add_pubname (decl, subr_die);
8285 add_arange (decl, subr_die);
8287 #ifdef MIPS_DEBUGGING_INFO
8288 /* Add a reference to the FDE for this routine. */
8289 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8292 /* Define the "frame base" location for this routine. We use the
8293 frame pointer or stack pointer registers, since the RTL for local
8294 variables is relative to one of them. */
8296 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8297 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8300 /* ??? This fails for nested inline functions, because context_display
8301 is not part of the state saved/restored for inline functions. */
8302 if (current_function_needs_context)
8303 add_AT_location_description (subr_die, DW_AT_static_link,
8304 lookup_static_chain (decl));
8308 /* Now output descriptions of the arguments for this function. This gets
8309 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8310 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8311 `...' at the end of the formal parameter list. In order to find out if
8312 there was a trailing ellipsis or not, we must instead look at the type
8313 associated with the FUNCTION_DECL. This will be a node of type
8314 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8315 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8316 an ellipsis at the end. */
8317 push_decl_scope (decl);
8319 /* In the case where we are describing a mere function declaration, all we
8320 need to do here (and all we *can* do here) is to describe the *types* of
8321 its formal parameters. */
8322 if (debug_info_level <= DINFO_LEVEL_TERSE)
8324 else if (declaration)
8325 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8328 /* Generate DIEs to represent all known formal parameters */
8329 register tree arg_decls = DECL_ARGUMENTS (decl);
8332 /* When generating DIEs, generate the unspecified_parameters DIE
8333 instead if we come across the arg "__builtin_va_alist" */
8334 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8335 if (TREE_CODE (parm) == PARM_DECL)
8337 if (DECL_NAME (parm)
8338 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8339 "__builtin_va_alist"))
8340 gen_unspecified_parameters_die (parm, subr_die);
8342 gen_decl_die (parm, subr_die);
8345 /* Decide whether we need a unspecified_parameters DIE at the end.
8346 There are 2 more cases to do this for: 1) the ansi ... declaration -
8347 this is detectable when the end of the arg list is not a
8348 void_type_node 2) an unprototyped function declaration (not a
8349 definition). This just means that we have no info about the
8350 parameters at all. */
8351 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8352 if (fn_arg_types != NULL)
8354 /* this is the prototyped case, check for ... */
8355 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8356 gen_unspecified_parameters_die (decl, subr_die);
8358 else if (DECL_INITIAL (decl) == NULL_TREE)
8359 gen_unspecified_parameters_die (decl, subr_die);
8362 /* Output Dwarf info for all of the stuff within the body of the function
8363 (if it has one - it may be just a declaration). */
8364 outer_scope = DECL_INITIAL (decl);
8366 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8367 node created to represent a function. This outermost BLOCK actually
8368 represents the outermost binding contour for the function, i.e. the
8369 contour in which the function's formal parameters and labels get
8370 declared. Curiously, it appears that the front end doesn't actually
8371 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8372 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8373 list for the function instead.) The BLOCK_VARS list for the
8374 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8375 the function however, and we output DWARF info for those in
8376 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8377 node representing the function's outermost pair of curly braces, and
8378 any blocks used for the base and member initializers of a C++
8379 constructor function. */
8380 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8382 current_function_has_inlines = 0;
8383 decls_for_scope (outer_scope, subr_die, 0);
8385 #if 0 && defined (MIPS_DEBUGGING_INFO)
8386 if (current_function_has_inlines)
8388 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8389 if (! comp_unit_has_inlines)
8391 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8392 comp_unit_has_inlines = 1;
8401 /* Generate a DIE to represent a declared data object. */
8404 gen_variable_die (decl, context_die)
8406 register dw_die_ref context_die;
8408 register tree origin = decl_ultimate_origin (decl);
8409 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8411 dw_die_ref old_die = lookup_decl_die (decl);
8413 = (DECL_EXTERNAL (decl)
8414 || current_function_decl != decl_function_context (decl)
8415 || context_die->die_tag == DW_TAG_structure_type
8416 || context_die->die_tag == DW_TAG_union_type);
8419 add_abstract_origin_attribute (var_die, origin);
8420 /* Loop unrolling can create multiple blocks that refer to the same
8421 static variable, so we must test for the DW_AT_declaration flag. */
8422 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8423 copy decls and set the DECL_ABSTRACT flag on them instead of
8425 else if (old_die && TREE_STATIC (decl)
8426 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8428 /* ??? This is an instantiation of a C++ class level static. */
8429 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8430 if (DECL_NAME (decl))
8432 register unsigned file_index
8433 = lookup_filename (DECL_SOURCE_FILE (decl));
8435 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8436 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8438 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8439 != DECL_SOURCE_LINE (decl))
8441 add_AT_unsigned (var_die, DW_AT_decl_line,
8442 DECL_SOURCE_LINE (decl));
8447 add_name_and_src_coords_attributes (var_die, decl);
8448 add_type_attribute (var_die, TREE_TYPE (decl),
8449 TREE_READONLY (decl),
8450 TREE_THIS_VOLATILE (decl), context_die);
8452 if (TREE_PUBLIC (decl))
8453 add_AT_flag (var_die, DW_AT_external, 1);
8455 if (DECL_ARTIFICIAL (decl))
8456 add_AT_flag (var_die, DW_AT_artificial, 1);
8458 if (TREE_PROTECTED (decl))
8459 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8461 else if (TREE_PRIVATE (decl))
8462 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8466 add_AT_flag (var_die, DW_AT_declaration, 1);
8468 if ((declaration && decl_class_context (decl)) || DECL_ABSTRACT (decl))
8469 equate_decl_number_to_die (decl, var_die);
8471 if (! declaration && ! DECL_ABSTRACT (decl))
8473 equate_decl_number_to_die (decl, var_die);
8474 add_location_or_const_value_attribute (var_die, decl);
8475 add_pubname (decl, var_die);
8479 /* Generate a DIE to represent a label identifier. */
8482 gen_label_die (decl, context_die)
8484 register dw_die_ref context_die;
8486 register tree origin = decl_ultimate_origin (decl);
8487 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8489 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8490 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8493 add_abstract_origin_attribute (lbl_die, origin);
8495 add_name_and_src_coords_attributes (lbl_die, decl);
8497 if (DECL_ABSTRACT (decl))
8498 equate_decl_number_to_die (decl, lbl_die);
8501 insn = DECL_RTL (decl);
8502 if (GET_CODE (insn) == CODE_LABEL)
8504 /* When optimization is enabled (via -O) some parts of the compiler
8505 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8506 represent source-level labels which were explicitly declared by
8507 the user. This really shouldn't be happening though, so catch
8508 it if it ever does happen. */
8509 if (INSN_DELETED_P (insn))
8512 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8513 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8514 (unsigned) INSN_UID (insn));
8515 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8520 /* Generate a DIE for a lexical block. */
8523 gen_lexical_block_die (stmt, context_die, depth)
8525 register dw_die_ref context_die;
8528 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8529 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8531 if (! BLOCK_ABSTRACT (stmt))
8533 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8535 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8536 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8537 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8540 push_decl_scope (stmt);
8541 decls_for_scope (stmt, stmt_die, depth);
8545 /* Generate a DIE for an inlined subprogram. */
8548 gen_inlined_subroutine_die (stmt, context_die, depth)
8550 register dw_die_ref context_die;
8553 if (! BLOCK_ABSTRACT (stmt))
8555 register dw_die_ref subr_die
8556 = new_die (DW_TAG_inlined_subroutine, context_die);
8557 register tree decl = block_ultimate_origin (stmt);
8558 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8560 add_abstract_origin_attribute (subr_die, decl);
8561 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8563 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8564 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL, next_block_number);
8565 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8566 push_decl_scope (decl);
8567 decls_for_scope (stmt, subr_die, depth);
8569 current_function_has_inlines = 1;
8573 /* Generate a DIE for a field in a record, or structure. */
8576 gen_field_die (decl, context_die)
8578 register dw_die_ref context_die;
8580 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8582 add_name_and_src_coords_attributes (decl_die, decl);
8583 add_type_attribute (decl_die, member_declared_type (decl),
8584 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8587 /* If this is a bit field... */
8588 if (DECL_BIT_FIELD_TYPE (decl))
8590 add_byte_size_attribute (decl_die, decl);
8591 add_bit_size_attribute (decl_die, decl);
8592 add_bit_offset_attribute (decl_die, decl);
8595 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8596 add_data_member_location_attribute (decl_die, decl);
8598 if (DECL_ARTIFICIAL (decl))
8599 add_AT_flag (decl_die, DW_AT_artificial, 1);
8601 if (TREE_PROTECTED (decl))
8602 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8604 else if (TREE_PRIVATE (decl))
8605 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8609 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8610 Use modified_type_die instead.
8611 We keep this code here just in case these types of DIEs may be needed to
8612 represent certain things in other languages (e.g. Pascal) someday. */
8614 gen_pointer_type_die (type, context_die)
8616 register dw_die_ref context_die;
8618 register dw_die_ref ptr_die
8619 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8621 equate_type_number_to_die (type, ptr_die);
8622 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8623 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8626 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8627 Use modified_type_die instead.
8628 We keep this code here just in case these types of DIEs may be needed to
8629 represent certain things in other languages (e.g. Pascal) someday. */
8631 gen_reference_type_die (type, context_die)
8633 register dw_die_ref context_die;
8635 register dw_die_ref ref_die
8636 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8638 equate_type_number_to_die (type, ref_die);
8639 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8640 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8644 /* Generate a DIE for a pointer to a member type. */
8646 gen_ptr_to_mbr_type_die (type, context_die)
8648 register dw_die_ref context_die;
8650 register dw_die_ref ptr_die
8651 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8653 equate_type_number_to_die (type, ptr_die);
8654 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8655 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
8656 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8659 /* Generate the DIE for the compilation unit. */
8662 gen_compile_unit_die (main_input_filename)
8663 register char *main_input_filename;
8666 char *wd = getpwd ();
8668 comp_unit_die = new_die (DW_TAG_compile_unit, NULL);
8669 add_name_attribute (comp_unit_die, main_input_filename);
8672 add_AT_string (comp_unit_die, DW_AT_comp_dir, wd);
8674 sprintf (producer, "%s %s", language_string, version_string);
8676 #ifdef MIPS_DEBUGGING_INFO
8677 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8678 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8679 not appear in the producer string, the debugger reaches the conclusion
8680 that the object file is stripped and has no debugging information.
8681 To get the MIPS/SGI debugger to believe that there is debugging
8682 information in the object file, we add a -g to the producer string. */
8683 if (debug_info_level > DINFO_LEVEL_TERSE)
8684 strcat (producer, " -g");
8687 add_AT_string (comp_unit_die, DW_AT_producer, producer);
8689 if (strcmp (language_string, "GNU C++") == 0)
8690 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C_plus_plus);
8692 else if (strcmp (language_string, "GNU Ada") == 0)
8693 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Ada83);
8695 else if (strcmp (language_string, "GNU F77") == 0)
8696 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Fortran77);
8698 else if (strcmp (language_string, "GNU Pascal") == 0)
8699 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_Pascal83);
8701 else if (flag_traditional)
8702 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C);
8705 add_AT_unsigned (comp_unit_die, DW_AT_language, DW_LANG_C89);
8707 #if 0 /* unimplemented */
8708 if (debug_info_level >= DINFO_LEVEL_VERBOSE)
8709 add_AT_unsigned (comp_unit_die, DW_AT_macro_info, 0);
8713 /* Generate a DIE for a string type. */
8716 gen_string_type_die (type, context_die)
8718 register dw_die_ref context_die;
8720 register dw_die_ref type_die
8721 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
8723 equate_type_number_to_die (type, type_die);
8725 /* Fudge the string length attribute for now. */
8727 /* TODO: add string length info.
8728 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8729 bound_representation (upper_bound, 0, 'u'); */
8732 /* Generate the DIE for a base class. */
8735 gen_inheritance_die (binfo, context_die)
8736 register tree binfo;
8737 register dw_die_ref context_die;
8739 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
8741 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
8742 add_data_member_location_attribute (die, binfo);
8744 if (TREE_VIA_VIRTUAL (binfo))
8745 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
8746 if (TREE_VIA_PUBLIC (binfo))
8747 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
8748 else if (TREE_VIA_PROTECTED (binfo))
8749 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
8752 /* Generate a DIE for a class member. */
8755 gen_member_die (type, context_die)
8757 register dw_die_ref context_die;
8759 register tree member;
8761 /* If this is not an incomplete type, output descriptions of each of its
8762 members. Note that as we output the DIEs necessary to represent the
8763 members of this record or union type, we will also be trying to output
8764 DIEs to represent the *types* of those members. However the `type'
8765 function (above) will specifically avoid generating type DIEs for member
8766 types *within* the list of member DIEs for this (containing) type execpt
8767 for those types (of members) which are explicitly marked as also being
8768 members of this (containing) type themselves. The g++ front- end can
8769 force any given type to be treated as a member of some other
8770 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8771 to point to the TREE node representing the appropriate (containing)
8774 /* First output info about the base classes. */
8775 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
8777 register tree bases = TYPE_BINFO_BASETYPES (type);
8778 register int n_bases = TREE_VEC_LENGTH (bases);
8781 for (i = 0; i < n_bases; i++)
8782 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
8785 /* Now output info about the data members and type members. */
8786 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
8787 gen_decl_die (member, context_die);
8789 /* Now output info about the function members (if any). */
8790 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
8791 gen_decl_die (member, context_die);
8794 /* Generate a DIE for a structure or union type. */
8797 gen_struct_or_union_type_die (type, context_die)
8799 register dw_die_ref context_die;
8801 register dw_die_ref type_die = lookup_type_die (type);
8802 register dw_die_ref scope_die = 0;
8803 register int nested = 0;
8805 if (type_die && ! TYPE_SIZE (type))
8808 if (TYPE_CONTEXT (type) != NULL_TREE
8809 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't')
8812 scope_die = scope_die_for (type, context_die);
8814 if (! type_die || (nested && scope_die == comp_unit_die))
8815 /* First occurrence of type or toplevel definition of nested class. */
8817 register dw_die_ref old_die = type_die;
8819 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
8820 ? DW_TAG_structure_type : DW_TAG_union_type,
8822 equate_type_number_to_die (type, type_die);
8823 add_name_attribute (type_die, type_tag (type));
8825 add_AT_die_ref (type_die, DW_AT_specification, old_die);
8828 remove_AT (type_die, DW_AT_declaration);
8830 /* If we're not in the right context to be defining this type, defer to
8831 avoid tricky recursion. */
8832 if (TYPE_SIZE (type) && decl_scope_depth > 0 && scope_die == comp_unit_die)
8834 add_AT_flag (type_die, DW_AT_declaration, 1);
8837 /* If this type has been completed, then give it a byte_size attribute and
8838 then give a list of members. */
8839 else if (TYPE_SIZE (type))
8841 /* Prevent infinite recursion in cases where the type of some member of
8842 this type is expressed in terms of this type itself. */
8843 TREE_ASM_WRITTEN (type) = 1;
8844 add_byte_size_attribute (type_die, type);
8845 if (TYPE_STUB_DECL (type) != NULL_TREE)
8846 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8848 /* If the first reference to this type was as the return type of an
8849 inline function, then it may not have a parent. Fix this now. */
8850 if (type_die->die_parent == NULL)
8851 add_child_die (scope_die, type_die);
8853 push_decl_scope (type);
8854 gen_member_die (type, type_die);
8857 /* GNU extension: Record what type our vtable lives in. */
8858 if (TYPE_VFIELD (type))
8860 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
8862 gen_type_die (vtype, context_die);
8863 add_AT_die_ref (type_die, DW_AT_containing_type,
8864 lookup_type_die (vtype));
8868 add_AT_flag (type_die, DW_AT_declaration, 1);
8871 /* Generate a DIE for a subroutine _type_. */
8874 gen_subroutine_type_die (type, context_die)
8876 register dw_die_ref context_die;
8878 register tree return_type = TREE_TYPE (type);
8879 register dw_die_ref subr_die
8880 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
8882 equate_type_number_to_die (type, subr_die);
8883 add_prototyped_attribute (subr_die, type);
8884 add_type_attribute (subr_die, return_type, 0, 0, context_die);
8885 gen_formal_types_die (type, subr_die);
8888 /* Generate a DIE for a type definition */
8891 gen_typedef_die (decl, context_die)
8893 register dw_die_ref context_die;
8895 register dw_die_ref type_die;
8896 register tree origin;
8898 if (TREE_ASM_WRITTEN (decl))
8900 TREE_ASM_WRITTEN (decl) = 1;
8902 type_die = new_die (DW_TAG_typedef, scope_die_for (decl, context_die));
8903 origin = decl_ultimate_origin (decl);
8905 add_abstract_origin_attribute (type_die, origin);
8909 add_name_and_src_coords_attributes (type_die, decl);
8910 if (DECL_ORIGINAL_TYPE (decl))
8912 type = DECL_ORIGINAL_TYPE (decl);
8913 equate_type_number_to_die (TREE_TYPE (decl), type_die);
8916 type = TREE_TYPE (decl);
8917 add_type_attribute (type_die, type, TREE_READONLY (decl),
8918 TREE_THIS_VOLATILE (decl), context_die);
8921 if (DECL_ABSTRACT (decl))
8922 equate_decl_number_to_die (decl, type_die);
8925 /* Generate a type description DIE. */
8928 gen_type_die (type, context_die)
8930 register dw_die_ref context_die;
8932 if (type == NULL_TREE || type == error_mark_node)
8935 /* We are going to output a DIE to represent the unqualified version of
8936 this type (i.e. without any const or volatile qualifiers) so get the
8937 main variant (i.e. the unqualified version) of this type now. */
8938 type = type_main_variant (type);
8940 if (TREE_ASM_WRITTEN (type))
8943 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
8944 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
8946 TREE_ASM_WRITTEN (type) = 1;
8947 gen_decl_die (TYPE_NAME (type), context_die);
8951 switch (TREE_CODE (type))
8957 case REFERENCE_TYPE:
8958 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8959 ensures that the gen_type_die recursion will terminate even if the
8960 type is recursive. Recursive types are possible in Ada. */
8961 /* ??? We could perhaps do this for all types before the switch
8963 TREE_ASM_WRITTEN (type) = 1;
8965 /* For these types, all that is required is that we output a DIE (or a
8966 set of DIEs) to represent the "basis" type. */
8967 gen_type_die (TREE_TYPE (type), context_die);
8971 /* This code is used for C++ pointer-to-data-member types.
8972 Output a description of the relevant class type. */
8973 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
8975 /* Output a description of the type of the object pointed to. */
8976 gen_type_die (TREE_TYPE (type), context_die);
8978 /* Now output a DIE to represent this pointer-to-data-member type
8980 gen_ptr_to_mbr_type_die (type, context_die);
8984 gen_type_die (TYPE_DOMAIN (type), context_die);
8985 gen_set_type_die (type, context_die);
8989 gen_type_die (TREE_TYPE (type), context_die);
8990 abort (); /* No way to represent these in Dwarf yet! */
8994 /* Force out return type (in case it wasn't forced out already). */
8995 gen_type_die (TREE_TYPE (type), context_die);
8996 gen_subroutine_type_die (type, context_die);
9000 /* Force out return type (in case it wasn't forced out already). */
9001 gen_type_die (TREE_TYPE (type), context_die);
9002 gen_subroutine_type_die (type, context_die);
9006 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9008 gen_type_die (TREE_TYPE (type), context_die);
9009 gen_string_type_die (type, context_die);
9012 gen_array_type_die (type, context_die);
9018 case QUAL_UNION_TYPE:
9019 /* If this is a nested type whose containing class hasn't been
9020 written out yet, writing it out will cover this one, too. */
9021 if (TYPE_CONTEXT (type)
9022 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9023 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9025 gen_type_die (TYPE_CONTEXT (type), context_die);
9027 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9030 /* If that failed, attach ourselves to the stub. */
9031 push_decl_scope (TYPE_CONTEXT (type));
9032 context_die = lookup_type_die (TYPE_CONTEXT (type));
9035 if (TREE_CODE (type) == ENUMERAL_TYPE)
9036 gen_enumeration_type_die (type, context_die);
9038 gen_struct_or_union_type_die (type, context_die);
9040 if (TYPE_CONTEXT (type)
9041 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type))) == 't'
9042 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9045 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9046 it up if it is ever completed. gen_*_type_die will set it for us
9047 when appropriate. */
9056 /* No DIEs needed for fundamental types. */
9060 /* No Dwarf representation currently defined. */
9067 TREE_ASM_WRITTEN (type) = 1;
9070 /* Generate a DIE for a tagged type instantiation. */
9073 gen_tagged_type_instantiation_die (type, context_die)
9075 register dw_die_ref context_die;
9077 if (type == NULL_TREE || type == error_mark_node)
9080 /* We are going to output a DIE to represent the unqualified version of
9081 this type (i.e. without any const or volatile qualifiers) so make sure
9082 that we have the main variant (i.e. the unqualified version) of this
9084 if (type != type_main_variant (type)
9085 || !TREE_ASM_WRITTEN (type))
9088 switch (TREE_CODE (type))
9094 gen_inlined_enumeration_type_die (type, context_die);
9098 gen_inlined_structure_type_die (type, context_die);
9102 case QUAL_UNION_TYPE:
9103 gen_inlined_union_type_die (type, context_die);
9111 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9112 things which are local to the given block. */
9115 gen_block_die (stmt, context_die, depth)
9117 register dw_die_ref context_die;
9120 register int must_output_die = 0;
9121 register tree origin;
9123 register enum tree_code origin_code;
9125 /* Ignore blocks never really used to make RTL. */
9127 if (stmt == NULL_TREE || !TREE_USED (stmt))
9130 /* Determine the "ultimate origin" of this block. This block may be an
9131 inlined instance of an inlined instance of inline function, so we have
9132 to trace all of the way back through the origin chain to find out what
9133 sort of node actually served as the original seed for the creation of
9134 the current block. */
9135 origin = block_ultimate_origin (stmt);
9136 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9138 /* Determine if we need to output any Dwarf DIEs at all to represent this
9140 if (origin_code == FUNCTION_DECL)
9141 /* The outer scopes for inlinings *must* always be represented. We
9142 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9143 must_output_die = 1;
9146 /* In the case where the current block represents an inlining of the
9147 "body block" of an inline function, we must *NOT* output any DIE for
9148 this block because we have already output a DIE to represent the
9149 whole inlined function scope and the "body block" of any function
9150 doesn't really represent a different scope according to ANSI C
9151 rules. So we check here to make sure that this block does not
9152 represent a "body block inlining" before trying to set the
9153 `must_output_die' flag. */
9154 if (! is_body_block (origin ? origin : stmt))
9156 /* Determine if this block directly contains any "significant"
9157 local declarations which we will need to output DIEs for. */
9158 if (debug_info_level > DINFO_LEVEL_TERSE)
9159 /* We are not in terse mode so *any* local declaration counts
9160 as being a "significant" one. */
9161 must_output_die = (BLOCK_VARS (stmt) != NULL);
9163 /* We are in terse mode, so only local (nested) function
9164 definitions count as "significant" local declarations. */
9165 for (decl = BLOCK_VARS (stmt);
9166 decl != NULL; decl = TREE_CHAIN (decl))
9167 if (TREE_CODE (decl) == FUNCTION_DECL
9168 && DECL_INITIAL (decl))
9170 must_output_die = 1;
9176 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9177 DIE for any block which contains no significant local declarations at
9178 all. Rather, in such cases we just call `decls_for_scope' so that any
9179 needed Dwarf info for any sub-blocks will get properly generated. Note
9180 that in terse mode, our definition of what constitutes a "significant"
9181 local declaration gets restricted to include only inlined function
9182 instances and local (nested) function definitions. */
9183 if (must_output_die)
9185 if (origin_code == FUNCTION_DECL)
9186 gen_inlined_subroutine_die (stmt, context_die, depth);
9188 gen_lexical_block_die (stmt, context_die, depth);
9191 decls_for_scope (stmt, context_die, depth);
9194 /* Generate all of the decls declared within a given scope and (recursively)
9195 all of it's sub-blocks. */
9198 decls_for_scope (stmt, context_die, depth)
9200 register dw_die_ref context_die;
9204 register tree subblocks;
9206 /* Ignore blocks never really used to make RTL. */
9207 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9210 if (!BLOCK_ABSTRACT (stmt) && depth > 0)
9211 next_block_number++;
9213 /* Output the DIEs to represent all of the data objects and typedefs
9214 declared directly within this block but not within any nested
9215 sub-blocks. Also, nested function and tag DIEs have been
9216 generated with a parent of NULL; fix that up now. */
9217 for (decl = BLOCK_VARS (stmt);
9218 decl != NULL; decl = TREE_CHAIN (decl))
9220 register dw_die_ref die;
9222 if (TREE_CODE (decl) == FUNCTION_DECL)
9223 die = lookup_decl_die (decl);
9224 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9225 die = lookup_type_die (TREE_TYPE (decl));
9229 if (die != NULL && die->die_parent == NULL)
9230 add_child_die (context_die, die);
9232 gen_decl_die (decl, context_die);
9235 /* Output the DIEs to represent all sub-blocks (and the items declared
9236 therein) of this block. */
9237 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9239 subblocks = BLOCK_CHAIN (subblocks))
9240 gen_block_die (subblocks, context_die, depth + 1);
9243 /* Is this a typedef we can avoid emitting? */
9246 is_redundant_typedef (decl)
9249 if (TYPE_DECL_IS_STUB (decl))
9252 if (DECL_ARTIFICIAL (decl)
9253 && DECL_CONTEXT (decl)
9254 && is_tagged_type (DECL_CONTEXT (decl))
9255 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9256 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9257 /* Also ignore the artificial member typedef for the class name. */
9263 /* Generate Dwarf debug information for a decl described by DECL. */
9266 gen_decl_die (decl, context_die)
9268 register dw_die_ref context_die;
9270 register tree origin;
9272 /* Make a note of the decl node we are going to be working on. We may need
9273 to give the user the source coordinates of where it appeared in case we
9274 notice (later on) that something about it looks screwy. */
9275 dwarf_last_decl = decl;
9277 if (TREE_CODE (decl) == ERROR_MARK)
9280 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9281 ignore a function definition, since that would screw up our count of
9282 blocks, and that in turn will completely screw up the labels we will
9283 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9284 subsequent blocks). */
9285 if (DECL_IGNORED_P (decl) && TREE_CODE (decl) != FUNCTION_DECL)
9288 switch (TREE_CODE (decl))
9291 /* The individual enumerators of an enum type get output when we output
9292 the Dwarf representation of the relevant enum type itself. */
9296 /* Don't output any DIEs to represent mere function declarations,
9297 unless they are class members or explicit block externs. */
9298 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9299 && (current_function_decl == NULL_TREE || ! DECL_ARTIFICIAL (decl)))
9302 if (debug_info_level > DINFO_LEVEL_TERSE)
9304 /* Before we describe the FUNCTION_DECL itself, make sure that we
9305 have described its return type. */
9306 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9308 /* And its containing type. */
9309 origin = decl_class_context (decl);
9310 if (origin != NULL_TREE)
9311 gen_type_die (origin, context_die);
9313 /* And its virtual context. */
9314 if (DECL_VINDEX (decl) != NULL_TREE)
9315 gen_type_die (DECL_CONTEXT (decl), context_die);
9318 /* Now output a DIE to represent the function itself. */
9319 gen_subprogram_die (decl, context_die);
9323 /* If we are in terse mode, don't generate any DIEs to represent any
9325 if (debug_info_level <= DINFO_LEVEL_TERSE)
9328 /* In the special case of a TYPE_DECL node representing the
9329 declaration of some type tag, if the given TYPE_DECL is marked as
9330 having been instantiated from some other (original) TYPE_DECL node
9331 (e.g. one which was generated within the original definition of an
9332 inline function) we have to generate a special (abbreviated)
9333 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9335 if (TYPE_DECL_IS_STUB (decl) && DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE)
9337 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9341 if (is_redundant_typedef (decl))
9342 gen_type_die (TREE_TYPE (decl), context_die);
9344 /* Output a DIE to represent the typedef itself. */
9345 gen_typedef_die (decl, context_die);
9349 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9350 gen_label_die (decl, context_die);
9354 /* If we are in terse mode, don't generate any DIEs to represent any
9355 variable declarations or definitions. */
9356 if (debug_info_level <= DINFO_LEVEL_TERSE)
9359 /* Output any DIEs that are needed to specify the type of this data
9361 gen_type_die (TREE_TYPE (decl), context_die);
9363 /* And its containing type. */
9364 origin = decl_class_context (decl);
9365 if (origin != NULL_TREE)
9366 gen_type_die (origin, context_die);
9368 /* Now output the DIE to represent the data object itself. This gets
9369 complicated because of the possibility that the VAR_DECL really
9370 represents an inlined instance of a formal parameter for an inline
9372 origin = decl_ultimate_origin (decl);
9373 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9374 gen_formal_parameter_die (decl, context_die);
9376 gen_variable_die (decl, context_die);
9380 /* Ignore the nameless fields that are used to skip bits, but
9381 handle C++ anonymous unions. */
9382 if (DECL_NAME (decl) != NULL_TREE
9383 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9385 gen_type_die (member_declared_type (decl), context_die);
9386 gen_field_die (decl, context_die);
9391 gen_type_die (TREE_TYPE (decl), context_die);
9392 gen_formal_parameter_die (decl, context_die);
9400 /* Write the debugging output for DECL. */
9403 dwarf2out_decl (decl)
9406 register dw_die_ref context_die = comp_unit_die;
9408 if (TREE_CODE (decl) == ERROR_MARK)
9411 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9412 hope that the node in question doesn't represent a function definition.
9413 If it does, then totally ignoring it is bound to screw up our count of
9414 blocks, and that in turn will completely screw up the labels we will
9415 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9416 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9417 own sequence numbers with them!) */
9418 if (DECL_IGNORED_P (decl))
9420 if (TREE_CODE (decl) == FUNCTION_DECL
9421 && DECL_INITIAL (decl) != NULL)
9427 switch (TREE_CODE (decl))
9430 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9431 builtin function. Explicit programmer-supplied declarations of
9432 these same functions should NOT be ignored however. */
9433 if (DECL_EXTERNAL (decl) && DECL_FUNCTION_CODE (decl))
9436 /* What we would really like to do here is to filter out all mere
9437 file-scope declarations of file-scope functions which are never
9438 referenced later within this translation unit (and keep all of ones
9439 that *are* referenced later on) but we aren't clairvoyant, so we have
9440 no idea which functions will be referenced in the future (i.e. later
9441 on within the current translation unit). So here we just ignore all
9442 file-scope function declarations which are not also definitions. If
9443 and when the debugger needs to know something about these functions,
9444 it wil have to hunt around and find the DWARF information associated
9445 with the definition of the function. Note that we can't just check
9446 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9447 definitions and which ones represent mere declarations. We have to
9448 check `DECL_INITIAL' instead. That's because the C front-end
9449 supports some weird semantics for "extern inline" function
9450 definitions. These can get inlined within the current translation
9451 unit (an thus, we need to generate DWARF info for their abstract
9452 instances so that the DWARF info for the concrete inlined instances
9453 can have something to refer to) but the compiler never generates any
9454 out-of-lines instances of such things (despite the fact that they
9455 *are* definitions). The important point is that the C front-end
9456 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9457 to generate DWARF for them anyway. Note that the C++ front-end also
9458 plays some similar games for inline function definitions appearing
9459 within include files which also contain
9460 `#pragma interface' pragmas. */
9461 if (DECL_INITIAL (decl) == NULL_TREE)
9464 /* If we're a nested function, initially use a parent of NULL; if we're
9465 a plain function, this will be fixed up in decls_for_scope. If
9466 we're a method, it will be ignored, since we already have a DIE. */
9467 if (decl_function_context (decl))
9473 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9474 declaration and if the declaration was never even referenced from
9475 within this entire compilation unit. We suppress these DIEs in
9476 order to save space in the .debug section (by eliminating entries
9477 which are probably useless). Note that we must not suppress
9478 block-local extern declarations (whether used or not) because that
9479 would screw-up the debugger's name lookup mechanism and cause it to
9480 miss things which really ought to be in scope at a given point. */
9481 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9484 /* If we are in terse mode, don't generate any DIEs to represent any
9485 variable declarations or definitions. */
9486 if (debug_info_level <= DINFO_LEVEL_TERSE)
9491 /* Don't bother trying to generate any DIEs to represent any of the
9492 normal built-in types for the language we are compiling. */
9493 if (DECL_SOURCE_LINE (decl) == 0)
9495 /* OK, we need to generate one for `bool' so GDB knows what type
9496 comparisons have. */
9497 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9498 == DW_LANG_C_plus_plus)
9499 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9500 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9505 /* If we are in terse mode, don't generate any DIEs for types. */
9506 if (debug_info_level <= DINFO_LEVEL_TERSE)
9509 /* If we're a function-scope tag, initially use a parent of NULL;
9510 this will be fixed up in decls_for_scope. */
9511 if (decl_function_context (decl))
9520 gen_decl_die (decl, context_die);
9521 output_pending_types_for_scope (comp_unit_die);
9524 /* Output a marker (i.e. a label) for the beginning of the generated code for
9528 dwarf2out_begin_block (blocknum)
9529 register unsigned blocknum;
9531 function_section (current_function_decl);
9532 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9535 /* Output a marker (i.e. a label) for the end of the generated code for a
9539 dwarf2out_end_block (blocknum)
9540 register unsigned blocknum;
9542 function_section (current_function_decl);
9543 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9546 /* Output a marker (i.e. a label) at a point in the assembly code which
9547 corresponds to a given source level label. */
9550 dwarf2out_label (insn)
9553 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9555 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9557 function_section (current_function_decl);
9558 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9559 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9560 (unsigned) INSN_UID (insn));
9564 /* Lookup a filename (in the list of filenames that we know about here in
9565 dwarf2out.c) and return its "index". The index of each (known) filename is
9566 just a unique number which is associated with only that one filename.
9567 We need such numbers for the sake of generating labels
9568 (in the .debug_sfnames section) and references to those
9569 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9570 If the filename given as an argument is not found in our current list,
9571 add it to the list and assign it the next available unique index number.
9572 In order to speed up searches, we remember the index of the filename
9573 was looked up last. This handles the majority of all searches. */
9576 lookup_filename (file_name)
9579 static unsigned last_file_lookup_index = 0;
9580 register unsigned i;
9582 /* Check to see if the file name that was searched on the previous call
9583 matches this file name. If so, return the index. */
9584 if (last_file_lookup_index != 0)
9585 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
9586 return last_file_lookup_index;
9588 /* Didn't match the previous lookup, search the table */
9589 for (i = 1; i < file_table_in_use; ++i)
9590 if (strcmp (file_name, file_table[i]) == 0)
9592 last_file_lookup_index = i;
9596 /* Prepare to add a new table entry by making sure there is enough space in
9597 the table to do so. If not, expand the current table. */
9598 if (file_table_in_use == file_table_allocated)
9600 file_table_allocated += FILE_TABLE_INCREMENT;
9602 = (char **) xrealloc (file_table,
9603 file_table_allocated * sizeof (char *));
9606 /* Add the new entry to the end of the filename table. */
9607 file_table[file_table_in_use] = xstrdup (file_name);
9608 last_file_lookup_index = file_table_in_use++;
9610 return last_file_lookup_index;
9613 /* Output a label to mark the beginning of a source code line entry
9614 and record information relating to this source line, in
9615 'line_info_table' for later output of the .debug_line section. */
9618 dwarf2out_line (filename, line)
9619 register char *filename;
9620 register unsigned line;
9622 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9624 function_section (current_function_decl);
9626 if (DECL_SECTION_NAME (current_function_decl))
9628 register dw_separate_line_info_ref line_info;
9629 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
9630 separate_line_info_table_in_use);
9631 fputc ('\n', asm_out_file);
9633 /* expand the line info table if necessary */
9634 if (separate_line_info_table_in_use
9635 == separate_line_info_table_allocated)
9637 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9638 separate_line_info_table
9639 = (dw_separate_line_info_ref)
9640 xrealloc (separate_line_info_table,
9641 separate_line_info_table_allocated
9642 * sizeof (dw_separate_line_info_entry));
9645 /* Add the new entry at the end of the line_info_table. */
9647 = &separate_line_info_table[separate_line_info_table_in_use++];
9648 line_info->dw_file_num = lookup_filename (filename);
9649 line_info->dw_line_num = line;
9650 line_info->function = current_funcdef_number;
9654 register dw_line_info_ref line_info;
9656 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
9657 line_info_table_in_use);
9658 fputc ('\n', asm_out_file);
9660 /* Expand the line info table if necessary. */
9661 if (line_info_table_in_use == line_info_table_allocated)
9663 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
9665 = (dw_line_info_ref)
9666 xrealloc (line_info_table,
9667 (line_info_table_allocated
9668 * sizeof (dw_line_info_entry)));
9671 /* Add the new entry at the end of the line_info_table. */
9672 line_info = &line_info_table[line_info_table_in_use++];
9673 line_info->dw_file_num = lookup_filename (filename);
9674 line_info->dw_line_num = line;
9679 /* Record the beginning of a new source file, for later output
9680 of the .debug_macinfo section. At present, unimplemented. */
9683 dwarf2out_start_source_file (filename)
9684 register char *filename ATTRIBUTE_UNUSED;
9688 /* Record the end of a source file, for later output
9689 of the .debug_macinfo section. At present, unimplemented. */
9692 dwarf2out_end_source_file ()
9696 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9697 the tail part of the directive line, i.e. the part which is past the
9698 initial whitespace, #, whitespace, directive-name, whitespace part. */
9701 dwarf2out_define (lineno, buffer)
9702 register unsigned lineno;
9703 register char *buffer;
9705 static int initialized = 0;
9708 dwarf2out_start_source_file (primary_filename);
9713 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9714 the tail part of the directive line, i.e. the part which is past the
9715 initial whitespace, #, whitespace, directive-name, whitespace part. */
9718 dwarf2out_undef (lineno, buffer)
9719 register unsigned lineno ATTRIBUTE_UNUSED;
9720 register char *buffer ATTRIBUTE_UNUSED;
9724 /* Set up for Dwarf output at the start of compilation. */
9727 dwarf2out_init (asm_out_file, main_input_filename)
9728 register FILE *asm_out_file;
9729 register char *main_input_filename;
9731 /* Remember the name of the primary input file. */
9732 primary_filename = main_input_filename;
9734 /* Allocate the initial hunk of the file_table. */
9735 file_table = (char **) xmalloc (FILE_TABLE_INCREMENT * sizeof (char *));
9736 bzero ((char *) file_table, FILE_TABLE_INCREMENT * sizeof (char *));
9737 file_table_allocated = FILE_TABLE_INCREMENT;
9739 /* Skip the first entry - file numbers begin at 1. */
9740 file_table_in_use = 1;
9742 /* Allocate the initial hunk of the decl_die_table. */
9744 = (dw_die_ref *) xmalloc (DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9745 bzero ((char *) decl_die_table,
9746 DECL_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9747 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
9748 decl_die_table_in_use = 0;
9750 /* Allocate the initial hunk of the decl_scope_table. */
9752 = (decl_scope_node *) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9753 * sizeof (decl_scope_node));
9754 bzero ((char *) decl_scope_table,
9755 DECL_SCOPE_TABLE_INCREMENT * sizeof (decl_scope_node));
9756 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
9757 decl_scope_depth = 0;
9759 /* Allocate the initial hunk of the abbrev_die_table. */
9761 = (dw_die_ref *) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9762 * sizeof (dw_die_ref));
9763 bzero ((char *) abbrev_die_table,
9764 ABBREV_DIE_TABLE_INCREMENT * sizeof (dw_die_ref));
9765 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
9766 /* Zero-th entry is allocated, but unused */
9767 abbrev_die_table_in_use = 1;
9769 /* Allocate the initial hunk of the line_info_table. */
9771 = (dw_line_info_ref) xmalloc (LINE_INFO_TABLE_INCREMENT
9772 * sizeof (dw_line_info_entry));
9773 bzero ((char *) line_info_table,
9774 LINE_INFO_TABLE_INCREMENT * sizeof (dw_line_info_entry));
9775 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
9776 /* Zero-th entry is allocated, but unused */
9777 line_info_table_in_use = 1;
9779 /* Generate the initial DIE for the .debug section. Note that the (string)
9780 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9781 will (typically) be a relative pathname and that this pathname should be
9782 taken as being relative to the directory from which the compiler was
9783 invoked when the given (base) source file was compiled. */
9784 gen_compile_unit_die (main_input_filename);
9786 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
9789 /* Output stuff that dwarf requires at the end of every file,
9790 and generate the DWARF-2 debugging info. */
9795 limbo_die_node *node, *next_node;
9799 /* Traverse the limbo die list, and add parent/child links. The only
9800 dies without parents that should be here are concrete instances of
9801 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9802 For concrete instances, we can get the parent die from the abstract
9804 for (node = limbo_die_list; node; node = next_node)
9806 next_node = node->next;
9809 if (die->die_parent == NULL)
9811 a = get_AT (die, DW_AT_abstract_origin);
9813 add_child_die (a->dw_attr_val.v.val_die_ref->die_parent, die);
9814 else if (die == comp_unit_die)
9822 /* Traverse the DIE tree and add sibling attributes to those DIE's
9823 that have children. */
9824 add_sibling_attributes (comp_unit_die);
9826 /* Output a terminator label for the .text section. */
9827 fputc ('\n', asm_out_file);
9828 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
9829 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
9832 /* Output a terminator label for the .data section. */
9833 fputc ('\n', asm_out_file);
9834 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
9835 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
9837 /* Output a terminator label for the .bss section. */
9838 fputc ('\n', asm_out_file);
9839 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
9840 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
9843 /* Output the source line correspondence table. */
9844 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
9846 fputc ('\n', asm_out_file);
9847 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
9848 output_line_info ();
9850 /* We can only use the low/high_pc attributes if all of the code
9852 if (separate_line_info_table_in_use == 0)
9854 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, TEXT_SECTION);
9855 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
9858 add_AT_section_offset (comp_unit_die, DW_AT_stmt_list, DEBUG_LINE_SECTION);
9861 /* Output the abbreviation table. */
9862 fputc ('\n', asm_out_file);
9863 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
9864 build_abbrev_table (comp_unit_die);
9865 output_abbrev_section ();
9867 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9868 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
9869 calc_die_sizes (comp_unit_die);
9871 /* Output debugging information. */
9872 fputc ('\n', asm_out_file);
9873 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
9874 output_compilation_unit_header ();
9875 output_die (comp_unit_die);
9877 if (pubname_table_in_use)
9879 /* Output public names table. */
9880 fputc ('\n', asm_out_file);
9881 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
9885 if (fde_table_in_use)
9887 /* Output the address range information. */
9888 fputc ('\n', asm_out_file);
9889 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
9893 #endif /* DWARF2_DEBUGGING_INFO */