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, 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* The first part of this file deals with the DWARF 2 frame unwind
25 information, which is also used by the GCC efficient exception handling
26 mechanism. The second part, controlled only by an #ifdef
27 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
36 #include "hard-reg-set.h"
38 #include "insn-config.h"
44 #include "dwarf2out.h"
46 #include "dyn-string.h"
48 /* We cannot use <assert.h> in GCC source, since that would include
49 GCC's assert.h, which may not be compatible with the host compiler. */
54 # define assert(e) do { if (! (e)) abort (); } while (0)
57 /* Decide whether we want to emit frame unwind information for the current
63 return (write_symbols
== DWARF2_DEBUG
64 #ifdef DWARF2_FRAME_INFO
67 #ifdef DWARF2_UNWIND_INFO
68 || (flag_exceptions
&& ! exceptions_via_longjmp
)
73 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
79 /* How to start an assembler comment. */
80 #ifndef ASM_COMMENT_START
81 #define ASM_COMMENT_START ";#"
84 typedef struct dw_cfi_struct
*dw_cfi_ref
;
85 typedef struct dw_fde_struct
*dw_fde_ref
;
86 typedef union dw_cfi_oprnd_struct
*dw_cfi_oprnd_ref
;
88 /* Call frames are described using a sequence of Call Frame
89 Information instructions. The register number, offset
90 and address fields are provided as possible operands;
91 their use is selected by the opcode field. */
93 typedef union dw_cfi_oprnd_struct
95 unsigned long dw_cfi_reg_num
;
96 long int dw_cfi_offset
;
101 typedef struct dw_cfi_struct
103 dw_cfi_ref dw_cfi_next
;
104 enum dwarf_call_frame_info dw_cfi_opc
;
105 dw_cfi_oprnd dw_cfi_oprnd1
;
106 dw_cfi_oprnd dw_cfi_oprnd2
;
110 /* All call frame descriptions (FDE's) in the GCC generated DWARF
111 refer to a single Common Information Entry (CIE), defined at
112 the beginning of the .debug_frame section. This used of a single
113 CIE obviates the need to keep track of multiple CIE's
114 in the DWARF generation routines below. */
116 typedef struct dw_fde_struct
119 char *dw_fde_current_label
;
121 dw_cfi_ref dw_fde_cfi
;
125 /* Maximum size (in bytes) of an artificially generated label. */
126 #define MAX_ARTIFICIAL_LABEL_BYTES 30
128 /* Make sure we know the sizes of the various types dwarf can describe. These
129 are only defaults. If the sizes are different for your target, you should
130 override these values by defining the appropriate symbols in your tm.h
133 #ifndef CHAR_TYPE_SIZE
134 #define CHAR_TYPE_SIZE BITS_PER_UNIT
137 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
140 /* The size in bytes of a DWARF field indicating an offset or length
141 relative to a debug info section, specified to be 4 bytes in the DWARF-2
142 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
144 #ifndef DWARF_OFFSET_SIZE
145 #define DWARF_OFFSET_SIZE 4
148 #define DWARF_VERSION 2
150 /* Round SIZE up to the nearest BOUNDARY. */
151 #define DWARF_ROUND(SIZE,BOUNDARY) \
152 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
154 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
155 #ifdef STACK_GROWS_DOWNWARD
156 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
158 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
161 /* A pointer to the base of a table that contains frame description
162 information for each routine. */
163 static dw_fde_ref fde_table
;
165 /* Number of elements currently allocated for fde_table. */
166 static unsigned fde_table_allocated
;
168 /* Number of elements in fde_table currently in use. */
169 static unsigned fde_table_in_use
;
171 /* Size (in elements) of increments by which we may expand the
173 #define FDE_TABLE_INCREMENT 256
175 /* A list of call frame insns for the CIE. */
176 static dw_cfi_ref cie_cfi_head
;
178 /* The number of the current function definition for which debugging
179 information is being generated. These numbers range from 1 up to the
180 maximum number of function definitions contained within the current
181 compilation unit. These numbers are used to create unique label id's
182 unique to each function definition. */
183 static unsigned current_funcdef_number
= 0;
185 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
186 attribute that accelerates the lookup of the FDE associated
187 with the subprogram. This variable holds the table index of the FDE
188 associated with the current function (body) definition. */
189 static unsigned current_funcdef_fde
;
191 /* Forward declarations for functions defined in this file. */
193 static char *stripattributes
PROTO((char *));
194 static char *dwarf_cfi_name
PROTO((unsigned));
195 static dw_cfi_ref new_cfi
PROTO((void));
196 static void add_cfi
PROTO((dw_cfi_ref
*, dw_cfi_ref
));
197 static unsigned long size_of_uleb128
PROTO((unsigned long));
198 static unsigned long size_of_sleb128
PROTO((long));
199 static void output_uleb128
PROTO((unsigned long));
200 static void output_sleb128
PROTO((long));
201 static void add_fde_cfi
PROTO((char *, dw_cfi_ref
));
202 static void lookup_cfa_1
PROTO((dw_cfi_ref
, unsigned long *,
204 static void lookup_cfa
PROTO((unsigned long *, long *));
205 static void reg_save
PROTO((char *, unsigned, unsigned,
207 static void initial_return_save
PROTO((rtx
));
208 static void output_cfi
PROTO((dw_cfi_ref
, dw_fde_ref
));
209 static void output_call_frame_info
PROTO((int));
210 static unsigned reg_number
PROTO((rtx
));
211 static void dwarf2out_stack_adjust
PROTO((rtx
));
213 /* Definitions of defaults for assembler-dependent names of various
214 pseudo-ops and section names.
215 Theses may be overridden in the tm.h file (if necessary) for a particular
218 #ifdef OBJECT_FORMAT_ELF
219 #ifndef UNALIGNED_SHORT_ASM_OP
220 #define UNALIGNED_SHORT_ASM_OP ".2byte"
222 #ifndef UNALIGNED_INT_ASM_OP
223 #define UNALIGNED_INT_ASM_OP ".4byte"
225 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
226 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
228 #endif /* OBJECT_FORMAT_ELF */
231 #define ASM_BYTE_OP ".byte"
234 /* Data and reference forms for relocatable data. */
235 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
236 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
238 /* Pseudo-op for defining a new section. */
239 #ifndef SECTION_ASM_OP
240 #define SECTION_ASM_OP ".section"
243 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
244 print the SECTION_ASM_OP and the section name. The default here works for
245 almost all svr4 assemblers, except for the sparc, where the section name
246 must be enclosed in double quotes. (See sparcv4.h). */
247 #ifndef SECTION_FORMAT
248 #ifdef PUSHSECTION_FORMAT
249 #define SECTION_FORMAT PUSHSECTION_FORMAT
251 #define SECTION_FORMAT "\t%s\t%s\n"
255 #ifndef FRAME_SECTION
256 #define FRAME_SECTION ".debug_frame"
259 #ifndef FUNC_BEGIN_LABEL
260 #define FUNC_BEGIN_LABEL "LFB"
262 #ifndef FUNC_END_LABEL
263 #define FUNC_END_LABEL "LFE"
265 #define CIE_AFTER_SIZE_LABEL "LSCIE"
266 #define CIE_END_LABEL "LECIE"
267 #define CIE_LENGTH_LABEL "LLCIE"
268 #define FDE_AFTER_SIZE_LABEL "LSFDE"
269 #define FDE_END_LABEL "LEFDE"
270 #define FDE_LENGTH_LABEL "LLFDE"
272 /* Definitions of defaults for various types of primitive assembly language
273 output operations. These may be overridden from within the tm.h file,
274 but typically, that is unnecessary. */
276 #ifndef ASM_OUTPUT_SECTION
277 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
278 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
281 #ifndef ASM_OUTPUT_DWARF_DATA1
282 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
283 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
286 #ifndef ASM_OUTPUT_DWARF_DELTA1
287 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
288 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
289 assemble_name (FILE, LABEL1); \
290 fprintf (FILE, "-"); \
291 assemble_name (FILE, LABEL2); \
295 #ifdef UNALIGNED_INT_ASM_OP
297 #ifndef UNALIGNED_OFFSET_ASM_OP
298 #define UNALIGNED_OFFSET_ASM_OP \
299 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
302 #ifndef UNALIGNED_WORD_ASM_OP
303 #define UNALIGNED_WORD_ASM_OP \
304 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
307 #ifndef ASM_OUTPUT_DWARF_DELTA2
308 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
309 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
310 assemble_name (FILE, LABEL1); \
311 fprintf (FILE, "-"); \
312 assemble_name (FILE, LABEL2); \
316 #ifndef ASM_OUTPUT_DWARF_DELTA4
317 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
318 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
319 assemble_name (FILE, LABEL1); \
320 fprintf (FILE, "-"); \
321 assemble_name (FILE, LABEL2); \
325 #ifndef ASM_OUTPUT_DWARF_DELTA
326 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
327 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
328 assemble_name (FILE, LABEL1); \
329 fprintf (FILE, "-"); \
330 assemble_name (FILE, LABEL2); \
334 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
335 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
336 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
337 assemble_name (FILE, LABEL1); \
338 fprintf (FILE, "-"); \
339 assemble_name (FILE, LABEL2); \
343 #ifndef ASM_OUTPUT_DWARF_ADDR
344 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
345 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
346 assemble_name (FILE, LABEL); \
350 /* ??? This macro takes an RTX in dwarfout.c and a string in dwarf2out.c.
351 We resolve the conflict by creating a new macro ASM_OUTPUT_DWARF2_ADDR_CONST
352 for ports that want to support both DWARF1 and DWARF2. This needs a better
353 solution. See also the comments in sparc/sp64-elf.h. */
354 #ifdef ASM_OUTPUT_DWARF2_ADDR_CONST
355 #undef ASM_OUTPUT_DWARF_ADDR_CONST
356 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
357 ASM_OUTPUT_DWARF2_ADDR_CONST (FILE, ADDR)
360 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
361 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
362 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
365 #ifndef ASM_OUTPUT_DWARF_OFFSET4
366 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
367 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
368 assemble_name (FILE, LABEL); \
372 #ifndef ASM_OUTPUT_DWARF_OFFSET
373 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
374 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
375 assemble_name (FILE, LABEL); \
379 #ifndef ASM_OUTPUT_DWARF_DATA2
380 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
381 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
384 #ifndef ASM_OUTPUT_DWARF_DATA4
385 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
386 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
389 #ifndef ASM_OUTPUT_DWARF_DATA
390 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
391 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
392 (unsigned long) (VALUE))
395 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
396 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
397 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
398 (unsigned long) (VALUE))
401 #ifndef ASM_OUTPUT_DWARF_DATA8
402 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
404 if (WORDS_BIG_ENDIAN) \
406 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
407 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
411 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
412 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
417 #else /* UNALIGNED_INT_ASM_OP */
419 /* We don't have unaligned support, let's hope the normal output works for
422 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
423 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
425 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
426 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
428 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
429 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
431 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
432 assemble_integer (gen_rtx_MINUS (HImode, \
433 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
434 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
437 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
438 assemble_integer (gen_rtx_MINUS (SImode, \
439 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
440 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
443 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
444 assemble_integer (gen_rtx_MINUS (Pmode, \
445 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
446 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
449 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
450 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
452 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
453 assemble_integer (GEN_INT (VALUE), 4, 1)
455 #endif /* UNALIGNED_INT_ASM_OP */
458 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
459 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
461 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
462 assemble_name (FILE, SY); \
464 assemble_name (FILE, HI); \
466 assemble_name (FILE, LO); \
469 #endif /* SET_ASM_OP */
471 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
472 newline is produced. When flag_debug_asm is asserted, we add commentary
473 at the end of the line, so we must avoid output of a newline here. */
474 #ifndef ASM_OUTPUT_DWARF_STRING
475 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
477 register int slen = strlen(P); \
478 register char *p = (P); \
480 fprintf (FILE, "\t.ascii \""); \
481 for (i = 0; i < slen; i++) \
483 register int c = p[i]; \
484 if (c == '\"' || c == '\\') \
486 if (c >= ' ' && c < 0177) \
490 fprintf (FILE, "\\%o", c); \
493 fprintf (FILE, "\\0\""); \
498 /* The DWARF 2 CFA column which tracks the return address. Normally this
499 is the column for PC, or the first column after all of the hard
501 #ifndef DWARF_FRAME_RETURN_COLUMN
503 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
505 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
509 /* The mapping from gcc register number to DWARF 2 CFA column number. By
510 default, we just provide columns for all registers. */
511 #ifndef DWARF_FRAME_REGNUM
512 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
515 /* Hook used by __throw. */
518 expand_builtin_dwarf_fp_regnum ()
520 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM
));
523 /* The offset from the incoming value of %sp to the top of the stack frame
524 for the current function. */
525 #ifndef INCOMING_FRAME_SP_OFFSET
526 #define INCOMING_FRAME_SP_OFFSET 0
529 /* Return a pointer to a copy of the section string name S with all
530 attributes stripped off, and an asterisk prepended (for assemble_name). */
536 char *stripped
= xmalloc (strlen (s
) + 2);
541 while (*s
&& *s
!= ',')
548 /* Return the register number described by a given RTL node. */
554 register unsigned regno
= REGNO (rtl
);
556 if (regno
>= FIRST_PSEUDO_REGISTER
)
558 warning ("internal regno botch: regno = %d\n", regno
);
562 regno
= DBX_REGISTER_NUMBER (regno
);
566 struct reg_size_range
573 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
574 We do this in kind of a roundabout way, by building up a list of
575 register size ranges and seeing where our register falls in one of those
576 ranges. We need to do it this way because REG_TREE is not a constant,
577 and the target macros were not designed to make this task easy. */
580 expand_builtin_dwarf_reg_size (reg_tree
, target
)
584 enum machine_mode mode
;
586 struct reg_size_range ranges
[5];
593 for (; i
< FIRST_PSEUDO_REGISTER
; ++i
)
595 /* The return address is out of order on the MIPS, and we don't use
596 copy_reg for it anyway, so we don't care here how large it is. */
597 if (DWARF_FRAME_REGNUM (i
) == DWARF_FRAME_RETURN_COLUMN
)
600 mode
= reg_raw_mode
[i
];
602 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
603 to use the same size as word_mode, since that reduces the number
604 of ranges we need. It should not matter, since the result should
605 never be used for a condition code register anyways. */
606 if (GET_MODE_CLASS (mode
) == MODE_CC
)
609 size
= GET_MODE_SIZE (mode
);
611 /* If this register is not valid in the specified mode and
612 we have a previous size, use that for the size of this
613 register to avoid making junk tiny ranges. */
614 if (! HARD_REGNO_MODE_OK (i
, mode
) && last_size
!= -1)
617 if (size
!= last_size
)
619 ranges
[n_ranges
].beg
= i
;
620 ranges
[n_ranges
].size
= last_size
= size
;
625 ranges
[n_ranges
-1].end
= i
;
628 /* The usual case: fp regs surrounded by general regs. */
629 if (n_ranges
== 3 && ranges
[0].size
== ranges
[2].size
)
631 if ((DWARF_FRAME_REGNUM (ranges
[1].end
)
632 - DWARF_FRAME_REGNUM (ranges
[1].beg
))
633 != ranges
[1].end
- ranges
[1].beg
)
635 t
= fold (build (GE_EXPR
, integer_type_node
, reg_tree
,
636 build_int_2 (DWARF_FRAME_REGNUM (ranges
[1].beg
), 0)));
637 t2
= fold (build (LE_EXPR
, integer_type_node
, reg_tree
,
638 build_int_2 (DWARF_FRAME_REGNUM (ranges
[1].end
), 0)));
639 t
= fold (build (TRUTH_ANDIF_EXPR
, integer_type_node
, t
, t2
));
640 t
= fold (build (COND_EXPR
, integer_type_node
, t
,
641 build_int_2 (ranges
[1].size
, 0),
642 build_int_2 (ranges
[0].size
, 0)));
646 /* Initialize last_end to be larger than any possible
647 DWARF_FRAME_REGNUM. */
648 int last_end
= 0x7fffffff;
650 t
= build_int_2 (ranges
[n_ranges
].size
, 0);
653 int beg
= DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
);
654 int end
= DWARF_FRAME_REGNUM (ranges
[n_ranges
].end
);
660 if (end
- beg
!= ranges
[n_ranges
].end
- ranges
[n_ranges
].beg
)
662 t2
= fold (build (LE_EXPR
, integer_type_node
, reg_tree
,
663 build_int_2 (end
, 0)));
664 t
= fold (build (COND_EXPR
, integer_type_node
, t2
,
665 build_int_2 (ranges
[n_ranges
].size
, 0), t
));
667 while (--n_ranges
>= 0);
669 return expand_expr (t
, target
, Pmode
, 0);
672 /* Convert a DWARF call frame info. operation to its string name */
675 dwarf_cfi_name (cfi_opc
)
676 register unsigned cfi_opc
;
680 case DW_CFA_advance_loc
:
681 return "DW_CFA_advance_loc";
683 return "DW_CFA_offset";
685 return "DW_CFA_restore";
689 return "DW_CFA_set_loc";
690 case DW_CFA_advance_loc1
:
691 return "DW_CFA_advance_loc1";
692 case DW_CFA_advance_loc2
:
693 return "DW_CFA_advance_loc2";
694 case DW_CFA_advance_loc4
:
695 return "DW_CFA_advance_loc4";
696 case DW_CFA_offset_extended
:
697 return "DW_CFA_offset_extended";
698 case DW_CFA_restore_extended
:
699 return "DW_CFA_restore_extended";
700 case DW_CFA_undefined
:
701 return "DW_CFA_undefined";
702 case DW_CFA_same_value
:
703 return "DW_CFA_same_value";
704 case DW_CFA_register
:
705 return "DW_CFA_register";
706 case DW_CFA_remember_state
:
707 return "DW_CFA_remember_state";
708 case DW_CFA_restore_state
:
709 return "DW_CFA_restore_state";
711 return "DW_CFA_def_cfa";
712 case DW_CFA_def_cfa_register
:
713 return "DW_CFA_def_cfa_register";
714 case DW_CFA_def_cfa_offset
:
715 return "DW_CFA_def_cfa_offset";
717 /* SGI/MIPS specific */
718 case DW_CFA_MIPS_advance_loc8
:
719 return "DW_CFA_MIPS_advance_loc8";
722 case DW_CFA_GNU_window_save
:
723 return "DW_CFA_GNU_window_save";
724 case DW_CFA_GNU_args_size
:
725 return "DW_CFA_GNU_args_size";
728 return "DW_CFA_<unknown>";
732 /* Return a pointer to a newly allocated Call Frame Instruction. */
734 static inline dw_cfi_ref
737 register dw_cfi_ref cfi
= (dw_cfi_ref
) xmalloc (sizeof (dw_cfi_node
));
739 cfi
->dw_cfi_next
= NULL
;
740 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= 0;
741 cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
= 0;
746 /* Add a Call Frame Instruction to list of instructions. */
749 add_cfi (list_head
, cfi
)
750 register dw_cfi_ref
*list_head
;
751 register dw_cfi_ref cfi
;
753 register dw_cfi_ref
*p
;
755 /* Find the end of the chain. */
756 for (p
= list_head
; (*p
) != NULL
; p
= &(*p
)->dw_cfi_next
)
762 /* Generate a new label for the CFI info to refer to. */
765 dwarf2out_cfi_label ()
767 static char label
[20];
768 static unsigned long label_num
= 0;
770 ASM_GENERATE_INTERNAL_LABEL (label
, "LCFI", label_num
++);
771 ASM_OUTPUT_LABEL (asm_out_file
, label
);
776 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
777 or to the CIE if LABEL is NULL. */
780 add_fde_cfi (label
, cfi
)
781 register char *label
;
782 register dw_cfi_ref cfi
;
786 register dw_fde_ref fde
= &fde_table
[fde_table_in_use
- 1];
789 label
= dwarf2out_cfi_label ();
791 if (fde
->dw_fde_current_label
== NULL
792 || strcmp (label
, fde
->dw_fde_current_label
) != 0)
794 register dw_cfi_ref xcfi
;
796 fde
->dw_fde_current_label
= label
= xstrdup (label
);
798 /* Set the location counter to the new label. */
800 xcfi
->dw_cfi_opc
= DW_CFA_advance_loc4
;
801 xcfi
->dw_cfi_oprnd1
.dw_cfi_addr
= label
;
802 add_cfi (&fde
->dw_fde_cfi
, xcfi
);
805 add_cfi (&fde
->dw_fde_cfi
, cfi
);
809 add_cfi (&cie_cfi_head
, cfi
);
812 /* Subroutine of lookup_cfa. */
815 lookup_cfa_1 (cfi
, regp
, offsetp
)
816 register dw_cfi_ref cfi
;
817 register unsigned long *regp
;
818 register long *offsetp
;
820 switch (cfi
->dw_cfi_opc
)
822 case DW_CFA_def_cfa_offset
:
823 *offsetp
= cfi
->dw_cfi_oprnd1
.dw_cfi_offset
;
825 case DW_CFA_def_cfa_register
:
826 *regp
= cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
;
829 *regp
= cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
;
830 *offsetp
= cfi
->dw_cfi_oprnd2
.dw_cfi_offset
;
837 /* Find the previous value for the CFA. */
840 lookup_cfa (regp
, offsetp
)
841 register unsigned long *regp
;
842 register long *offsetp
;
844 register dw_cfi_ref cfi
;
846 *regp
= (unsigned long) -1;
849 for (cfi
= cie_cfi_head
; cfi
; cfi
= cfi
->dw_cfi_next
)
850 lookup_cfa_1 (cfi
, regp
, offsetp
);
852 if (fde_table_in_use
)
854 register dw_fde_ref fde
= &fde_table
[fde_table_in_use
- 1];
855 for (cfi
= fde
->dw_fde_cfi
; cfi
; cfi
= cfi
->dw_cfi_next
)
856 lookup_cfa_1 (cfi
, regp
, offsetp
);
860 /* The current rule for calculating the DWARF2 canonical frame address. */
861 static unsigned long cfa_reg
;
862 static long cfa_offset
;
864 /* The register used for saving registers to the stack, and its offset
866 static unsigned cfa_store_reg
;
867 static long cfa_store_offset
;
869 /* The running total of the size of arguments pushed onto the stack. */
870 static long args_size
;
872 /* The last args_size we actually output. */
873 static long old_args_size
;
875 /* Entry point to update the canonical frame address (CFA).
876 LABEL is passed to add_fde_cfi. The value of CFA is now to be
877 calculated from REG+OFFSET. */
880 dwarf2out_def_cfa (label
, reg
, offset
)
881 register char *label
;
882 register unsigned reg
;
883 register long offset
;
885 register dw_cfi_ref cfi
;
886 unsigned long old_reg
;
891 if (cfa_store_reg
== reg
)
892 cfa_store_offset
= offset
;
894 reg
= DWARF_FRAME_REGNUM (reg
);
895 lookup_cfa (&old_reg
, &old_offset
);
897 if (reg
== old_reg
&& offset
== old_offset
)
904 cfi
->dw_cfi_opc
= DW_CFA_def_cfa_offset
;
905 cfi
->dw_cfi_oprnd1
.dw_cfi_offset
= offset
;
908 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
909 else if (offset
== old_offset
&& old_reg
!= (unsigned long) -1)
911 cfi
->dw_cfi_opc
= DW_CFA_def_cfa_register
;
912 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
918 cfi
->dw_cfi_opc
= DW_CFA_def_cfa
;
919 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
920 cfi
->dw_cfi_oprnd2
.dw_cfi_offset
= offset
;
923 add_fde_cfi (label
, cfi
);
926 /* Add the CFI for saving a register. REG is the CFA column number.
927 LABEL is passed to add_fde_cfi.
928 If SREG is -1, the register is saved at OFFSET from the CFA;
929 otherwise it is saved in SREG. */
932 reg_save (label
, reg
, sreg
, offset
)
933 register char * label
;
934 register unsigned reg
;
935 register unsigned sreg
;
936 register long offset
;
938 register dw_cfi_ref cfi
= new_cfi ();
940 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
942 /* The following comparison is correct. -1 is used to indicate that
943 the value isn't a register number. */
944 if (sreg
== (unsigned int) -1)
947 /* The register number won't fit in 6 bits, so we have to use
949 cfi
->dw_cfi_opc
= DW_CFA_offset_extended
;
951 cfi
->dw_cfi_opc
= DW_CFA_offset
;
953 offset
/= DWARF_CIE_DATA_ALIGNMENT
;
956 cfi
->dw_cfi_oprnd2
.dw_cfi_offset
= offset
;
960 cfi
->dw_cfi_opc
= DW_CFA_register
;
961 cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
= sreg
;
964 add_fde_cfi (label
, cfi
);
967 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
968 This CFI tells the unwinder that it needs to restore the window registers
969 from the previous frame's window save area.
971 ??? Perhaps we should note in the CIE where windows are saved (instead of
972 assuming 0(cfa)) and what registers are in the window. */
975 dwarf2out_window_save (label
)
976 register char * label
;
978 register dw_cfi_ref cfi
= new_cfi ();
979 cfi
->dw_cfi_opc
= DW_CFA_GNU_window_save
;
980 add_fde_cfi (label
, cfi
);
983 /* Add a CFI to update the running total of the size of arguments
984 pushed onto the stack. */
987 dwarf2out_args_size (label
, size
)
991 register dw_cfi_ref cfi
;
993 if (size
== old_args_size
)
995 old_args_size
= size
;
998 cfi
->dw_cfi_opc
= DW_CFA_GNU_args_size
;
999 cfi
->dw_cfi_oprnd1
.dw_cfi_offset
= size
;
1000 add_fde_cfi (label
, cfi
);
1003 /* Entry point for saving a register to the stack. REG is the GCC register
1004 number. LABEL and OFFSET are passed to reg_save. */
1007 dwarf2out_reg_save (label
, reg
, offset
)
1008 register char * label
;
1009 register unsigned reg
;
1010 register long offset
;
1012 reg_save (label
, DWARF_FRAME_REGNUM (reg
), -1, offset
);
1015 /* Entry point for saving the return address in the stack.
1016 LABEL and OFFSET are passed to reg_save. */
1019 dwarf2out_return_save (label
, offset
)
1020 register char * label
;
1021 register long offset
;
1023 reg_save (label
, DWARF_FRAME_RETURN_COLUMN
, -1, offset
);
1026 /* Entry point for saving the return address in a register.
1027 LABEL and SREG are passed to reg_save. */
1030 dwarf2out_return_reg (label
, sreg
)
1031 register char * label
;
1032 register unsigned sreg
;
1034 reg_save (label
, DWARF_FRAME_RETURN_COLUMN
, sreg
, 0);
1037 /* Record the initial position of the return address. RTL is
1038 INCOMING_RETURN_ADDR_RTX. */
1041 initial_return_save (rtl
)
1044 unsigned int reg
= (unsigned int) -1;
1047 switch (GET_CODE (rtl
))
1050 /* RA is in a register. */
1051 reg
= reg_number (rtl
);
1054 /* RA is on the stack. */
1055 rtl
= XEXP (rtl
, 0);
1056 switch (GET_CODE (rtl
))
1059 if (REGNO (rtl
) != STACK_POINTER_REGNUM
)
1064 if (REGNO (XEXP (rtl
, 0)) != STACK_POINTER_REGNUM
)
1066 offset
= INTVAL (XEXP (rtl
, 1));
1069 if (REGNO (XEXP (rtl
, 0)) != STACK_POINTER_REGNUM
)
1071 offset
= -INTVAL (XEXP (rtl
, 1));
1078 /* The return address is at some offset from any value we can
1079 actually load. For instance, on the SPARC it is in %i7+8. Just
1080 ignore the offset for now; it doesn't matter for unwinding frames. */
1081 if (GET_CODE (XEXP (rtl
, 1)) != CONST_INT
)
1083 initial_return_save (XEXP (rtl
, 0));
1089 reg_save (NULL
, DWARF_FRAME_RETURN_COLUMN
, reg
, offset
- cfa_offset
);
1092 /* Check INSN to see if it looks like a push or a stack adjustment, and
1093 make a note of it if it does. EH uses this information to find out how
1094 much extra space it needs to pop off the stack. */
1097 dwarf2out_stack_adjust (insn
)
1103 if (! asynchronous_exceptions
&& GET_CODE (insn
) == CALL_INSN
)
1105 /* Extract the size of the args from the CALL rtx itself. */
1107 insn
= PATTERN (insn
);
1108 if (GET_CODE (insn
) == PARALLEL
)
1109 insn
= XVECEXP (insn
, 0, 0);
1110 if (GET_CODE (insn
) == SET
)
1111 insn
= SET_SRC (insn
);
1112 assert (GET_CODE (insn
) == CALL
);
1113 dwarf2out_args_size ("", INTVAL (XEXP (insn
, 1)));
1117 /* If only calls can throw, and we have a frame pointer,
1118 save up adjustments until we see the CALL_INSN. */
1119 else if (! asynchronous_exceptions
1120 && cfa_reg
!= STACK_POINTER_REGNUM
)
1123 if (GET_CODE (insn
) == BARRIER
)
1125 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1126 the compiler will have already emitted a stack adjustment, but
1127 doesn't bother for calls to noreturn functions. */
1128 #ifdef STACK_GROWS_DOWNWARD
1129 offset
= -args_size
;
1134 else if (GET_CODE (PATTERN (insn
)) == SET
)
1139 insn
= PATTERN (insn
);
1140 src
= SET_SRC (insn
);
1141 dest
= SET_DEST (insn
);
1143 if (dest
== stack_pointer_rtx
)
1145 /* (set (reg sp) (plus (reg sp) (const_int))) */
1146 code
= GET_CODE (src
);
1147 if (! (code
== PLUS
|| code
== MINUS
)
1148 || XEXP (src
, 0) != stack_pointer_rtx
1149 || GET_CODE (XEXP (src
, 1)) != CONST_INT
)
1152 offset
= INTVAL (XEXP (src
, 1));
1154 else if (GET_CODE (dest
) == MEM
)
1156 /* (set (mem (pre_dec (reg sp))) (foo)) */
1157 src
= XEXP (dest
, 0);
1158 code
= GET_CODE (src
);
1160 if (! (code
== PRE_DEC
|| code
== PRE_INC
)
1161 || XEXP (src
, 0) != stack_pointer_rtx
)
1164 offset
= GET_MODE_SIZE (GET_MODE (dest
));
1169 if (code
== PLUS
|| code
== PRE_INC
)
1178 if (cfa_reg
== STACK_POINTER_REGNUM
)
1179 cfa_offset
+= offset
;
1181 #ifndef STACK_GROWS_DOWNWARD
1184 args_size
+= offset
;
1188 label
= dwarf2out_cfi_label ();
1189 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1190 dwarf2out_args_size (label
, args_size
);
1193 /* Record call frame debugging information for INSN, which either
1194 sets SP or FP (adjusting how we calculate the frame address) or saves a
1195 register to the stack. If INSN is NULL_RTX, initialize our state. */
1198 dwarf2out_frame_debug (insn
)
1205 /* A temporary register used in adjusting SP or setting up the store_reg. */
1206 static unsigned cfa_temp_reg
;
1207 static long cfa_temp_value
;
1209 if (insn
== NULL_RTX
)
1211 /* Set up state for generating call frame debug info. */
1212 lookup_cfa (&cfa_reg
, &cfa_offset
);
1213 if (cfa_reg
!= DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM
))
1215 cfa_reg
= STACK_POINTER_REGNUM
;
1216 cfa_store_reg
= cfa_reg
;
1217 cfa_store_offset
= cfa_offset
;
1223 if (! RTX_FRAME_RELATED_P (insn
))
1225 dwarf2out_stack_adjust (insn
);
1229 label
= dwarf2out_cfi_label ();
1231 src
= find_reg_note (insn
, REG_FRAME_RELATED_EXPR
, NULL_RTX
);
1233 insn
= XEXP (src
, 0);
1235 insn
= PATTERN (insn
);
1237 /* Assume that in a PARALLEL prologue insn, only the first elt is
1238 significant. Currently this is true. */
1239 if (GET_CODE (insn
) == PARALLEL
)
1240 insn
= XVECEXP (insn
, 0, 0);
1241 if (GET_CODE (insn
) != SET
)
1244 src
= SET_SRC (insn
);
1245 dest
= SET_DEST (insn
);
1247 switch (GET_CODE (dest
))
1250 /* Update the CFA rule wrt SP or FP. Make sure src is
1251 relative to the current CFA register. */
1252 switch (GET_CODE (src
))
1254 /* Setting FP from SP. */
1256 if (cfa_reg
!= (unsigned) REGNO (src
))
1258 if (REGNO (dest
) != STACK_POINTER_REGNUM
1259 && !(frame_pointer_needed
1260 && REGNO (dest
) == HARD_FRAME_POINTER_REGNUM
))
1262 cfa_reg
= REGNO (dest
);
1267 if (dest
== stack_pointer_rtx
)
1270 switch (GET_CODE (XEXP (src
, 1)))
1273 offset
= INTVAL (XEXP (src
, 1));
1276 if ((unsigned) REGNO (XEXP (src
, 1)) != cfa_temp_reg
)
1278 offset
= cfa_temp_value
;
1284 if (XEXP (src
, 0) == hard_frame_pointer_rtx
)
1286 /* Restoring SP from FP in the epilogue. */
1287 if (cfa_reg
!= (unsigned) HARD_FRAME_POINTER_REGNUM
)
1289 cfa_reg
= STACK_POINTER_REGNUM
;
1291 else if (XEXP (src
, 0) != stack_pointer_rtx
)
1294 if (GET_CODE (src
) == PLUS
)
1296 if (cfa_reg
== STACK_POINTER_REGNUM
)
1297 cfa_offset
+= offset
;
1298 if (cfa_store_reg
== STACK_POINTER_REGNUM
)
1299 cfa_store_offset
+= offset
;
1301 else if (dest
== hard_frame_pointer_rtx
)
1303 /* Either setting the FP from an offset of the SP,
1304 or adjusting the FP */
1305 if (! frame_pointer_needed
1306 || REGNO (dest
) != HARD_FRAME_POINTER_REGNUM
)
1309 if (XEXP (src
, 0) == stack_pointer_rtx
1310 && GET_CODE (XEXP (src
, 1)) == CONST_INT
)
1312 if (cfa_reg
!= STACK_POINTER_REGNUM
)
1314 offset
= INTVAL (XEXP (src
, 1));
1315 if (GET_CODE (src
) == PLUS
)
1317 cfa_offset
+= offset
;
1318 cfa_reg
= HARD_FRAME_POINTER_REGNUM
;
1320 else if (XEXP (src
, 0) == hard_frame_pointer_rtx
1321 && GET_CODE (XEXP (src
, 1)) == CONST_INT
)
1323 if (cfa_reg
!= (unsigned) HARD_FRAME_POINTER_REGNUM
)
1325 offset
= INTVAL (XEXP (src
, 1));
1326 if (GET_CODE (src
) == PLUS
)
1328 cfa_offset
+= offset
;
1336 if (GET_CODE (src
) != PLUS
1337 || XEXP (src
, 1) != stack_pointer_rtx
)
1339 if (GET_CODE (XEXP (src
, 0)) != REG
1340 || (unsigned) REGNO (XEXP (src
, 0)) != cfa_temp_reg
)
1342 if (cfa_reg
!= STACK_POINTER_REGNUM
)
1344 cfa_store_reg
= REGNO (dest
);
1345 cfa_store_offset
= cfa_offset
- cfa_temp_value
;
1350 cfa_temp_reg
= REGNO (dest
);
1351 cfa_temp_value
= INTVAL (src
);
1355 if (GET_CODE (XEXP (src
, 0)) != REG
1356 || (unsigned) REGNO (XEXP (src
, 0)) != cfa_temp_reg
1357 || (unsigned) REGNO (dest
) != cfa_temp_reg
1358 || GET_CODE (XEXP (src
, 1)) != CONST_INT
)
1360 cfa_temp_value
|= INTVAL (XEXP (src
, 1));
1366 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1370 /* Saving a register to the stack. Make sure dest is relative to the
1372 if (GET_CODE (src
) != REG
)
1374 switch (GET_CODE (XEXP (dest
, 0)))
1379 offset
= GET_MODE_SIZE (GET_MODE (dest
));
1380 if (GET_CODE (XEXP (dest
, 0)) == PRE_INC
)
1383 if (REGNO (XEXP (XEXP (dest
, 0), 0)) != STACK_POINTER_REGNUM
1384 || cfa_store_reg
!= STACK_POINTER_REGNUM
)
1386 cfa_store_offset
+= offset
;
1387 if (cfa_reg
== STACK_POINTER_REGNUM
)
1388 cfa_offset
= cfa_store_offset
;
1390 offset
= -cfa_store_offset
;
1393 /* With an offset. */
1396 offset
= INTVAL (XEXP (XEXP (dest
, 0), 1));
1397 if (GET_CODE (src
) == MINUS
)
1400 if (cfa_store_reg
!= (unsigned) REGNO (XEXP (XEXP (dest
, 0), 0)))
1402 offset
-= cfa_store_offset
;
1405 /* Without an offset. */
1407 if (cfa_store_reg
!= (unsigned) REGNO (XEXP (dest
, 0)))
1409 offset
= -cfa_store_offset
;
1415 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1416 dwarf2out_reg_save (label
, REGNO (src
), offset
);
1424 /* Return the size of an unsigned LEB128 quantity. */
1426 static inline unsigned long
1427 size_of_uleb128 (value
)
1428 register unsigned long value
;
1430 register unsigned long size
= 0;
1431 register unsigned byte
;
1435 byte
= (value
& 0x7f);
1444 /* Return the size of a signed LEB128 quantity. */
1446 static inline unsigned long
1447 size_of_sleb128 (value
)
1448 register long value
;
1450 register unsigned long size
= 0;
1451 register unsigned byte
;
1455 byte
= (value
& 0x7f);
1459 while (!(((value
== 0) && ((byte
& 0x40) == 0))
1460 || ((value
== -1) && ((byte
& 0x40) != 0))));
1465 /* Output an unsigned LEB128 quantity. */
1468 output_uleb128 (value
)
1469 register unsigned long value
;
1471 unsigned long save_value
= value
;
1473 fprintf (asm_out_file
, "\t%s\t", ASM_BYTE_OP
);
1476 register unsigned byte
= (value
& 0x7f);
1479 /* More bytes to follow. */
1482 fprintf (asm_out_file
, "0x%x", byte
);
1484 fprintf (asm_out_file
, ",");
1489 fprintf (asm_out_file
, "\t%s ULEB128 0x%lx", ASM_COMMENT_START
, save_value
);
1492 /* Output an signed LEB128 quantity. */
1495 output_sleb128 (value
)
1496 register long value
;
1499 register unsigned byte
;
1500 long save_value
= value
;
1502 fprintf (asm_out_file
, "\t%s\t", ASM_BYTE_OP
);
1505 byte
= (value
& 0x7f);
1506 /* arithmetic shift */
1508 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
1509 || ((value
== -1) && ((byte
& 0x40) != 0))));
1513 fprintf (asm_out_file
, "0x%x", byte
);
1515 fprintf (asm_out_file
, ",");
1520 fprintf (asm_out_file
, "\t%s SLEB128 %ld", ASM_COMMENT_START
, save_value
);
1523 /* Output a Call Frame Information opcode and its operand(s). */
1526 output_cfi (cfi
, fde
)
1527 register dw_cfi_ref cfi
;
1528 register dw_fde_ref fde
;
1530 if (cfi
->dw_cfi_opc
== DW_CFA_advance_loc
)
1532 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1534 | (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
& 0x3f));
1536 fprintf (asm_out_file
, "\t%s DW_CFA_advance_loc 0x%lx",
1537 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1538 fputc ('\n', asm_out_file
);
1541 else if (cfi
->dw_cfi_opc
== DW_CFA_offset
)
1543 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1545 | (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
& 0x3f));
1547 fprintf (asm_out_file
, "\t%s DW_CFA_offset, column 0x%lx",
1548 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1550 fputc ('\n', asm_out_file
);
1551 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_offset
);
1552 fputc ('\n', asm_out_file
);
1554 else if (cfi
->dw_cfi_opc
== DW_CFA_restore
)
1556 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1558 | (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
& 0x3f));
1560 fprintf (asm_out_file
, "\t%s DW_CFA_restore, column 0x%lx",
1561 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1563 fputc ('\n', asm_out_file
);
1567 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, cfi
->dw_cfi_opc
);
1569 fprintf (asm_out_file
, "\t%s %s", ASM_COMMENT_START
,
1570 dwarf_cfi_name (cfi
->dw_cfi_opc
));
1572 fputc ('\n', asm_out_file
);
1573 switch (cfi
->dw_cfi_opc
)
1575 case DW_CFA_set_loc
:
1576 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, cfi
->dw_cfi_oprnd1
.dw_cfi_addr
);
1577 fputc ('\n', asm_out_file
);
1579 case DW_CFA_advance_loc1
:
1580 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file
,
1581 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1582 fde
->dw_fde_current_label
);
1583 fputc ('\n', asm_out_file
);
1584 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1586 case DW_CFA_advance_loc2
:
1587 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
,
1588 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1589 fde
->dw_fde_current_label
);
1590 fputc ('\n', asm_out_file
);
1591 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1593 case DW_CFA_advance_loc4
:
1594 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
,
1595 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1596 fde
->dw_fde_current_label
);
1597 fputc ('\n', asm_out_file
);
1598 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1600 #ifdef MIPS_DEBUGGING_INFO
1601 case DW_CFA_MIPS_advance_loc8
:
1602 /* TODO: not currently implemented. */
1606 case DW_CFA_offset_extended
:
1607 case DW_CFA_def_cfa
:
1608 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1609 fputc ('\n', asm_out_file
);
1610 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_offset
);
1611 fputc ('\n', asm_out_file
);
1613 case DW_CFA_restore_extended
:
1614 case DW_CFA_undefined
:
1615 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1616 fputc ('\n', asm_out_file
);
1618 case DW_CFA_same_value
:
1619 case DW_CFA_def_cfa_register
:
1620 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1621 fputc ('\n', asm_out_file
);
1623 case DW_CFA_register
:
1624 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1625 fputc ('\n', asm_out_file
);
1626 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
);
1627 fputc ('\n', asm_out_file
);
1629 case DW_CFA_def_cfa_offset
:
1630 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1631 fputc ('\n', asm_out_file
);
1633 case DW_CFA_GNU_window_save
:
1635 case DW_CFA_GNU_args_size
:
1636 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1637 fputc ('\n', asm_out_file
);
1645 #if !defined (EH_FRAME_SECTION)
1646 #if defined (EH_FRAME_SECTION_ASM_OP)
1647 #define EH_FRAME_SECTION() eh_frame_section();
1649 #if defined (ASM_OUTPUT_SECTION_NAME)
1650 #define EH_FRAME_SECTION() \
1652 named_section (NULL_TREE, ".eh_frame", 0); \
1658 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
1659 #if !defined (HAS_INIT_SECTION) && !defined (INIT_SECTION_ASM_OP)
1660 #undef EH_FRAME_SECTION
1663 /* Output the call frame information used to used to record information
1664 that relates to calculating the frame pointer, and records the
1665 location of saved registers. */
1668 output_call_frame_info (for_eh
)
1671 register unsigned long i
;
1672 register dw_fde_ref fde
;
1673 register dw_cfi_ref cfi
;
1674 char l1
[20], l2
[20];
1675 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1679 /* Do we want to include a pointer to the exception table? */
1680 int eh_ptr
= for_eh
&& exception_table_p ();
1682 fputc ('\n', asm_out_file
);
1684 /* We're going to be generating comments, so turn on app. */
1690 #ifdef EH_FRAME_SECTION
1691 EH_FRAME_SECTION ();
1693 tree label
= get_file_function_name ('F');
1695 force_data_section ();
1696 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1697 ASM_GLOBALIZE_LABEL (asm_out_file
, IDENTIFIER_POINTER (label
));
1698 ASM_OUTPUT_LABEL (asm_out_file
, IDENTIFIER_POINTER (label
));
1700 assemble_label ("__FRAME_BEGIN__");
1703 ASM_OUTPUT_SECTION (asm_out_file
, FRAME_SECTION
);
1705 /* Output the CIE. */
1706 ASM_GENERATE_INTERNAL_LABEL (l1
, CIE_AFTER_SIZE_LABEL
, for_eh
);
1707 ASM_GENERATE_INTERNAL_LABEL (l2
, CIE_END_LABEL
, for_eh
);
1708 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1709 ASM_GENERATE_INTERNAL_LABEL (ld
, CIE_LENGTH_LABEL
, for_eh
);
1711 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file
, ld
);
1713 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, ld
);
1716 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l2
, l1
);
1718 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l2
, l1
);
1721 fprintf (asm_out_file
, "\t%s Length of Common Information Entry",
1724 fputc ('\n', asm_out_file
);
1725 ASM_OUTPUT_LABEL (asm_out_file
, l1
);
1728 /* Now that the CIE pointer is PC-relative for EH,
1729 use 0 to identify the CIE. */
1730 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 0);
1732 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, DW_CIE_ID
);
1735 fprintf (asm_out_file
, "\t%s CIE Identifier Tag", ASM_COMMENT_START
);
1737 fputc ('\n', asm_out_file
);
1738 if (! for_eh
&& DWARF_OFFSET_SIZE
== 8)
1740 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, DW_CIE_ID
);
1741 fputc ('\n', asm_out_file
);
1744 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_CIE_VERSION
);
1746 fprintf (asm_out_file
, "\t%s CIE Version", ASM_COMMENT_START
);
1748 fputc ('\n', asm_out_file
);
1751 /* The CIE contains a pointer to the exception region info for the
1752 frame. Make the augmentation string three bytes (including the
1753 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1754 can't handle unaligned relocs. */
1757 ASM_OUTPUT_DWARF_STRING (asm_out_file
, "eh");
1758 fprintf (asm_out_file
, "\t%s CIE Augmentation", ASM_COMMENT_START
);
1762 ASM_OUTPUT_ASCII (asm_out_file
, "eh", 3);
1764 fputc ('\n', asm_out_file
);
1766 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, "__EXCEPTION_TABLE__");
1768 fprintf (asm_out_file
, "\t%s pointer to exception region info",
1773 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
1775 fprintf (asm_out_file
, "\t%s CIE Augmentation (none)",
1779 fputc ('\n', asm_out_file
);
1782 fprintf (asm_out_file
, " (CIE Code Alignment Factor)");
1784 fputc ('\n', asm_out_file
);
1785 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT
);
1787 fprintf (asm_out_file
, " (CIE Data Alignment Factor)");
1789 fputc ('\n', asm_out_file
);
1790 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_FRAME_RETURN_COLUMN
);
1792 fprintf (asm_out_file
, "\t%s CIE RA Column", ASM_COMMENT_START
);
1794 fputc ('\n', asm_out_file
);
1796 for (cfi
= cie_cfi_head
; cfi
!= NULL
; cfi
= cfi
->dw_cfi_next
)
1797 output_cfi (cfi
, NULL
);
1799 /* Pad the CIE out to an address sized boundary. */
1800 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1801 ASM_OUTPUT_LABEL (asm_out_file
, l2
);
1802 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1803 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file
, ld
, l2
, l1
);
1805 fprintf (asm_out_file
, "\t%s CIE Length Symbol", ASM_COMMENT_START
);
1806 fputc ('\n', asm_out_file
);
1809 /* Loop through all of the FDE's. */
1810 for (i
= 0; i
< fde_table_in_use
; ++i
)
1812 fde
= &fde_table
[i
];
1814 ASM_GENERATE_INTERNAL_LABEL (l1
, FDE_AFTER_SIZE_LABEL
, for_eh
+ i
*2);
1815 ASM_GENERATE_INTERNAL_LABEL (l2
, FDE_END_LABEL
, for_eh
+ i
*2);
1816 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1817 ASM_GENERATE_INTERNAL_LABEL (ld
, FDE_LENGTH_LABEL
, for_eh
+ i
*2);
1819 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file
, ld
);
1821 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, ld
);
1824 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l2
, l1
);
1826 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l2
, l1
);
1829 fprintf (asm_out_file
, "\t%s FDE Length", ASM_COMMENT_START
);
1830 fputc ('\n', asm_out_file
);
1831 ASM_OUTPUT_LABEL (asm_out_file
, l1
);
1833 /* ??? This always emits a 4 byte offset when for_eh is true, but it
1834 emits a target dependent sized offset when for_eh is not true.
1835 This inconsistency may confuse gdb. The only case where we need a
1836 non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI
1837 compatibility if we emit a 4 byte offset. We need a 4 byte offset
1838 though in order to be compatible with the dwarf_fde struct in frame.c.
1839 If the for_eh case is changed, then the struct in frame.c has
1840 to be adjusted appropriately. */
1842 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l1
, "__FRAME_BEGIN__");
1844 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (FRAME_SECTION
));
1846 fprintf (asm_out_file
, "\t%s FDE CIE offset", ASM_COMMENT_START
);
1848 fputc ('\n', asm_out_file
);
1849 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, fde
->dw_fde_begin
);
1851 fprintf (asm_out_file
, "\t%s FDE initial location", ASM_COMMENT_START
);
1853 fputc ('\n', asm_out_file
);
1854 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
,
1855 fde
->dw_fde_end
, fde
->dw_fde_begin
);
1857 fprintf (asm_out_file
, "\t%s FDE address range", ASM_COMMENT_START
);
1859 fputc ('\n', asm_out_file
);
1861 /* Loop through the Call Frame Instructions associated with
1863 fde
->dw_fde_current_label
= fde
->dw_fde_begin
;
1864 for (cfi
= fde
->dw_fde_cfi
; cfi
!= NULL
; cfi
= cfi
->dw_cfi_next
)
1865 output_cfi (cfi
, fde
);
1867 /* Pad the FDE out to an address sized boundary. */
1868 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1869 ASM_OUTPUT_LABEL (asm_out_file
, l2
);
1870 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1871 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file
, ld
, l2
, l1
);
1873 fprintf (asm_out_file
, "\t%s FDE Length Symbol", ASM_COMMENT_START
);
1874 fputc ('\n', asm_out_file
);
1877 #ifndef EH_FRAME_SECTION
1880 /* Emit terminating zero for table. */
1881 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 0);
1882 fputc ('\n', asm_out_file
);
1885 #ifdef MIPS_DEBUGGING_INFO
1886 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1887 get a value of 0. Putting .align 0 after the label fixes it. */
1888 ASM_OUTPUT_ALIGN (asm_out_file
, 0);
1891 /* Turn off app to make assembly quicker. */
1896 /* Output a marker (i.e. a label) for the beginning of a function, before
1900 dwarf2out_begin_prologue ()
1902 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
1903 register dw_fde_ref fde
;
1905 ++current_funcdef_number
;
1907 function_section (current_function_decl
);
1908 ASM_GENERATE_INTERNAL_LABEL (label
, FUNC_BEGIN_LABEL
,
1909 current_funcdef_number
);
1910 ASM_OUTPUT_LABEL (asm_out_file
, label
);
1912 /* Expand the fde table if necessary. */
1913 if (fde_table_in_use
== fde_table_allocated
)
1915 fde_table_allocated
+= FDE_TABLE_INCREMENT
;
1917 = (dw_fde_ref
) xrealloc (fde_table
,
1918 fde_table_allocated
* sizeof (dw_fde_node
));
1921 /* Record the FDE associated with this function. */
1922 current_funcdef_fde
= fde_table_in_use
;
1924 /* Add the new FDE at the end of the fde_table. */
1925 fde
= &fde_table
[fde_table_in_use
++];
1926 fde
->dw_fde_begin
= xstrdup (label
);
1927 fde
->dw_fde_current_label
= NULL
;
1928 fde
->dw_fde_end
= NULL
;
1929 fde
->dw_fde_cfi
= NULL
;
1931 args_size
= old_args_size
= 0;
1934 /* Output a marker (i.e. a label) for the absolute end of the generated code
1935 for a function definition. This gets called *after* the epilogue code has
1939 dwarf2out_end_epilogue ()
1942 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
1944 /* Output a label to mark the endpoint of the code generated for this
1946 ASM_GENERATE_INTERNAL_LABEL (label
, FUNC_END_LABEL
, current_funcdef_number
);
1947 ASM_OUTPUT_LABEL (asm_out_file
, label
);
1948 fde
= &fde_table
[fde_table_in_use
- 1];
1949 fde
->dw_fde_end
= xstrdup (label
);
1953 dwarf2out_frame_init ()
1955 /* Allocate the initial hunk of the fde_table. */
1957 = (dw_fde_ref
) xmalloc (FDE_TABLE_INCREMENT
* sizeof (dw_fde_node
));
1958 bzero ((char *) fde_table
, FDE_TABLE_INCREMENT
* sizeof (dw_fde_node
));
1959 fde_table_allocated
= FDE_TABLE_INCREMENT
;
1960 fde_table_in_use
= 0;
1962 /* Generate the CFA instructions common to all FDE's. Do it now for the
1963 sake of lookup_cfa. */
1965 #ifdef DWARF2_UNWIND_INFO
1966 /* On entry, the Canonical Frame Address is at SP. */
1967 dwarf2out_def_cfa (NULL
, STACK_POINTER_REGNUM
, INCOMING_FRAME_SP_OFFSET
);
1968 initial_return_save (INCOMING_RETURN_ADDR_RTX
);
1973 dwarf2out_frame_finish ()
1975 /* Output call frame information. */
1976 #ifdef MIPS_DEBUGGING_INFO
1977 if (write_symbols
== DWARF2_DEBUG
)
1978 output_call_frame_info (0);
1979 if (flag_exceptions
&& ! exceptions_via_longjmp
)
1980 output_call_frame_info (1);
1982 if (write_symbols
== DWARF2_DEBUG
1983 || (flag_exceptions
&& ! exceptions_via_longjmp
))
1984 output_call_frame_info (1);
1988 #endif /* .debug_frame support */
1990 /* And now, the support for symbolic debugging information. */
1991 #ifdef DWARF2_DEBUGGING_INFO
1993 extern char *getpwd
PROTO((void));
1995 /* NOTE: In the comments in this file, many references are made to
1996 "Debugging Information Entries". This term is abbreviated as `DIE'
1997 throughout the remainder of this file. */
1999 /* An internal representation of the DWARF output is built, and then
2000 walked to generate the DWARF debugging info. The walk of the internal
2001 representation is done after the entire program has been compiled.
2002 The types below are used to describe the internal representation. */
2004 /* Each DIE may have a series of attribute/value pairs. Values
2005 can take on several forms. The forms that are used in this
2006 implementation are listed below. */
2013 dw_val_class_unsigned_const
,
2014 dw_val_class_long_long
,
2017 dw_val_class_die_ref
,
2018 dw_val_class_fde_ref
,
2019 dw_val_class_lbl_id
,
2020 dw_val_class_section_offset
,
2025 /* Various DIE's use offsets relative to the beginning of the
2026 .debug_info section to refer to each other. */
2028 typedef long int dw_offset
;
2030 /* Define typedefs here to avoid circular dependencies. */
2032 typedef struct die_struct
*dw_die_ref
;
2033 typedef struct dw_attr_struct
*dw_attr_ref
;
2034 typedef struct dw_val_struct
*dw_val_ref
;
2035 typedef struct dw_line_info_struct
*dw_line_info_ref
;
2036 typedef struct dw_separate_line_info_struct
*dw_separate_line_info_ref
;
2037 typedef struct dw_loc_descr_struct
*dw_loc_descr_ref
;
2038 typedef struct pubname_struct
*pubname_ref
;
2039 typedef dw_die_ref
*arange_ref
;
2041 /* Describe a double word constant value. */
2043 typedef struct dw_long_long_struct
2050 /* Describe a floating point constant value. */
2052 typedef struct dw_fp_struct
2059 /* Each entry in the line_info_table maintains the file and
2060 line number associated with the label generated for that
2061 entry. The label gives the PC value associated with
2062 the line number entry. */
2064 typedef struct dw_line_info_struct
2066 unsigned long dw_file_num
;
2067 unsigned long dw_line_num
;
2071 /* Line information for functions in separate sections; each one gets its
2073 typedef struct dw_separate_line_info_struct
2075 unsigned long dw_file_num
;
2076 unsigned long dw_line_num
;
2077 unsigned long function
;
2079 dw_separate_line_info_entry
;
2081 /* The dw_val_node describes an attribute's value, as it is
2082 represented internally. */
2084 typedef struct dw_val_struct
2086 dw_val_class val_class
;
2090 dw_loc_descr_ref val_loc
;
2092 long unsigned val_unsigned
;
2093 dw_long_long_const val_long_long
;
2094 dw_float_const val_float
;
2095 dw_die_ref val_die_ref
;
2096 unsigned val_fde_index
;
2100 unsigned char val_flag
;
2106 /* Locations in memory are described using a sequence of stack machine
2109 typedef struct dw_loc_descr_struct
2111 dw_loc_descr_ref dw_loc_next
;
2112 enum dwarf_location_atom dw_loc_opc
;
2113 dw_val_node dw_loc_oprnd1
;
2114 dw_val_node dw_loc_oprnd2
;
2118 /* Each DIE attribute has a field specifying the attribute kind,
2119 a link to the next attribute in the chain, and an attribute value.
2120 Attributes are typically linked below the DIE they modify. */
2122 typedef struct dw_attr_struct
2124 enum dwarf_attribute dw_attr
;
2125 dw_attr_ref dw_attr_next
;
2126 dw_val_node dw_attr_val
;
2130 /* The Debugging Information Entry (DIE) structure */
2132 typedef struct die_struct
2134 enum dwarf_tag die_tag
;
2135 dw_attr_ref die_attr
;
2136 dw_attr_ref die_attr_last
;
2137 dw_die_ref die_parent
;
2138 dw_die_ref die_child
;
2139 dw_die_ref die_child_last
;
2141 dw_offset die_offset
;
2142 unsigned long die_abbrev
;
2146 /* The pubname structure */
2148 typedef struct pubname_struct
2155 /* The limbo die list structure. */
2156 typedef struct limbo_die_struct
2159 struct limbo_die_struct
*next
;
2163 /* How to start an assembler comment. */
2164 #ifndef ASM_COMMENT_START
2165 #define ASM_COMMENT_START ";#"
2168 /* Define a macro which returns non-zero for a TYPE_DECL which was
2169 implicitly generated for a tagged type.
2171 Note that unlike the gcc front end (which generates a NULL named
2172 TYPE_DECL node for each complete tagged type, each array type, and
2173 each function type node created) the g++ front end generates a
2174 _named_ TYPE_DECL node for each tagged type node created.
2175 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2176 generate a DW_TAG_typedef DIE for them. */
2178 #define TYPE_DECL_IS_STUB(decl) \
2179 (DECL_NAME (decl) == NULL_TREE \
2180 || (DECL_ARTIFICIAL (decl) \
2181 && is_tagged_type (TREE_TYPE (decl)) \
2182 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2183 /* This is necessary for stub decls that \
2184 appear in nested inline functions. */ \
2185 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2186 && (decl_ultimate_origin (decl) \
2187 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2189 /* Information concerning the compilation unit's programming
2190 language, and compiler version. */
2192 extern int flag_traditional
;
2193 extern char *version_string
;
2194 extern char *language_string
;
2196 /* Fixed size portion of the DWARF compilation unit header. */
2197 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2199 /* Fixed size portion of debugging line information prolog. */
2200 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2202 /* Fixed size portion of public names info. */
2203 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2205 /* Fixed size portion of the address range info. */
2206 #define DWARF_ARANGES_HEADER_SIZE \
2207 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2209 /* Define the architecture-dependent minimum instruction length (in bytes).
2210 In this implementation of DWARF, this field is used for information
2211 purposes only. Since GCC generates assembly language, we have
2212 no a priori knowledge of how many instruction bytes are generated
2213 for each source line, and therefore can use only the DW_LNE_set_address
2214 and DW_LNS_fixed_advance_pc line information commands. */
2216 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2217 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2220 /* Minimum line offset in a special line info. opcode.
2221 This value was chosen to give a reasonable range of values. */
2222 #define DWARF_LINE_BASE -10
2224 /* First special line opcde - leave room for the standard opcodes. */
2225 #define DWARF_LINE_OPCODE_BASE 10
2227 /* Range of line offsets in a special line info. opcode. */
2228 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2230 /* Flag that indicates the initial value of the is_stmt_start flag.
2231 In the present implementation, we do not mark any lines as
2232 the beginning of a source statement, because that information
2233 is not made available by the GCC front-end. */
2234 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2236 /* This location is used by calc_die_sizes() to keep track
2237 the offset of each DIE within the .debug_info section. */
2238 static unsigned long next_die_offset
;
2240 /* Record the root of the DIE's built for the current compilation unit. */
2241 static dw_die_ref comp_unit_die
;
2243 /* A list of DIEs with a NULL parent waiting to be relocated. */
2244 static limbo_die_node
*limbo_die_list
= 0;
2246 /* Pointer to an array of filenames referenced by this compilation unit. */
2247 static char **file_table
;
2249 /* Total number of entries in the table (i.e. array) pointed to by
2250 `file_table'. This is the *total* and includes both used and unused
2252 static unsigned file_table_allocated
;
2254 /* Number of entries in the file_table which are actually in use. */
2255 static unsigned file_table_in_use
;
2257 /* Size (in elements) of increments by which we may expand the filename
2259 #define FILE_TABLE_INCREMENT 64
2261 /* Local pointer to the name of the main input file. Initialized in
2263 static char *primary_filename
;
2265 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2266 which their beginnings are encountered. We output Dwarf debugging info
2267 that refers to the beginnings and ends of the ranges of code for each
2268 lexical block. The labels themselves are generated in final.c, which
2269 assigns numbers to the blocks in the same way. */
2270 static unsigned next_block_number
= 2;
2272 /* A pointer to the base of a table of references to DIE's that describe
2273 declarations. The table is indexed by DECL_UID() which is a unique
2274 number identifying each decl. */
2275 static dw_die_ref
*decl_die_table
;
2277 /* Number of elements currently allocated for the decl_die_table. */
2278 static unsigned decl_die_table_allocated
;
2280 /* Number of elements in decl_die_table currently in use. */
2281 static unsigned decl_die_table_in_use
;
2283 /* Size (in elements) of increments by which we may expand the
2285 #define DECL_DIE_TABLE_INCREMENT 256
2287 /* Structure used for the decl_scope table. scope is the current declaration
2288 scope, and previous is the entry that is the parent of this scope. This
2289 is usually but not always the immediately preceeding entry. */
2291 typedef struct decl_scope_struct
2298 /* A pointer to the base of a table of references to declaration
2299 scopes. This table is a display which tracks the nesting
2300 of declaration scopes at the current scope and containing
2301 scopes. This table is used to find the proper place to
2302 define type declaration DIE's. */
2303 static decl_scope_node
*decl_scope_table
;
2305 /* Number of elements currently allocated for the decl_scope_table. */
2306 static int decl_scope_table_allocated
;
2308 /* Current level of nesting of declaration scopes. */
2309 static int decl_scope_depth
;
2311 /* Size (in elements) of increments by which we may expand the
2312 decl_scope_table. */
2313 #define DECL_SCOPE_TABLE_INCREMENT 64
2315 /* A pointer to the base of a list of references to DIE's that
2316 are uniquely identified by their tag, presence/absence of
2317 children DIE's, and list of attribute/value pairs. */
2318 static dw_die_ref
*abbrev_die_table
;
2320 /* Number of elements currently allocated for abbrev_die_table. */
2321 static unsigned abbrev_die_table_allocated
;
2323 /* Number of elements in type_die_table currently in use. */
2324 static unsigned abbrev_die_table_in_use
;
2326 /* Size (in elements) of increments by which we may expand the
2327 abbrev_die_table. */
2328 #define ABBREV_DIE_TABLE_INCREMENT 256
2330 /* A pointer to the base of a table that contains line information
2331 for each source code line in .text in the compilation unit. */
2332 static dw_line_info_ref line_info_table
;
2334 /* Number of elements currently allocated for line_info_table. */
2335 static unsigned line_info_table_allocated
;
2337 /* Number of elements in separate_line_info_table currently in use. */
2338 static unsigned separate_line_info_table_in_use
;
2340 /* A pointer to the base of a table that contains line information
2341 for each source code line outside of .text in the compilation unit. */
2342 static dw_separate_line_info_ref separate_line_info_table
;
2344 /* Number of elements currently allocated for separate_line_info_table. */
2345 static unsigned separate_line_info_table_allocated
;
2347 /* Number of elements in line_info_table currently in use. */
2348 static unsigned line_info_table_in_use
;
2350 /* Size (in elements) of increments by which we may expand the
2352 #define LINE_INFO_TABLE_INCREMENT 1024
2354 /* A pointer to the base of a table that contains a list of publicly
2355 accessible names. */
2356 static pubname_ref pubname_table
;
2358 /* Number of elements currently allocated for pubname_table. */
2359 static unsigned pubname_table_allocated
;
2361 /* Number of elements in pubname_table currently in use. */
2362 static unsigned pubname_table_in_use
;
2364 /* Size (in elements) of increments by which we may expand the
2366 #define PUBNAME_TABLE_INCREMENT 64
2368 /* A pointer to the base of a table that contains a list of publicly
2369 accessible names. */
2370 static arange_ref arange_table
;
2372 /* Number of elements currently allocated for arange_table. */
2373 static unsigned arange_table_allocated
;
2375 /* Number of elements in arange_table currently in use. */
2376 static unsigned arange_table_in_use
;
2378 /* Size (in elements) of increments by which we may expand the
2380 #define ARANGE_TABLE_INCREMENT 64
2382 /* A pointer to the base of a list of pending types which we haven't
2383 generated DIEs for yet, but which we will have to come back to
2386 static tree
*pending_types_list
;
2388 /* Number of elements currently allocated for the pending_types_list. */
2389 static unsigned pending_types_allocated
;
2391 /* Number of elements of pending_types_list currently in use. */
2392 static unsigned pending_types
;
2394 /* Size (in elements) of increments by which we may expand the pending
2395 types list. Actually, a single hunk of space of this size should
2396 be enough for most typical programs. */
2397 #define PENDING_TYPES_INCREMENT 64
2399 /* Record whether the function being analyzed contains inlined functions. */
2400 static int current_function_has_inlines
;
2401 #if 0 && defined (MIPS_DEBUGGING_INFO)
2402 static int comp_unit_has_inlines
;
2405 /* A pointer to the ..._DECL node which we have most recently been working
2406 on. We keep this around just in case something about it looks screwy and
2407 we want to tell the user what the source coordinates for the actual
2409 static tree dwarf_last_decl
;
2411 /* Forward declarations for functions defined in this file. */
2413 static void addr_const_to_string
PROTO((dyn_string_t
, rtx
));
2414 static char *addr_to_string
PROTO((rtx
));
2415 static int is_pseudo_reg
PROTO((rtx
));
2416 static tree type_main_variant
PROTO((tree
));
2417 static int is_tagged_type
PROTO((tree
));
2418 static char *dwarf_tag_name
PROTO((unsigned));
2419 static char *dwarf_attr_name
PROTO((unsigned));
2420 static char *dwarf_form_name
PROTO((unsigned));
2421 static char *dwarf_stack_op_name
PROTO((unsigned));
2423 static char *dwarf_type_encoding_name
PROTO((unsigned));
2425 static tree decl_ultimate_origin
PROTO((tree
));
2426 static tree block_ultimate_origin
PROTO((tree
));
2427 static tree decl_class_context
PROTO((tree
));
2428 static void add_dwarf_attr
PROTO((dw_die_ref
, dw_attr_ref
));
2429 static void add_AT_flag
PROTO((dw_die_ref
,
2430 enum dwarf_attribute
,
2432 static void add_AT_int
PROTO((dw_die_ref
,
2433 enum dwarf_attribute
, long));
2434 static void add_AT_unsigned
PROTO((dw_die_ref
,
2435 enum dwarf_attribute
,
2437 static void add_AT_long_long
PROTO((dw_die_ref
,
2438 enum dwarf_attribute
,
2439 unsigned long, unsigned long));
2440 static void add_AT_float
PROTO((dw_die_ref
,
2441 enum dwarf_attribute
,
2443 static void add_AT_string
PROTO((dw_die_ref
,
2444 enum dwarf_attribute
, char *));
2445 static void add_AT_die_ref
PROTO((dw_die_ref
,
2446 enum dwarf_attribute
,
2448 static void add_AT_fde_ref
PROTO((dw_die_ref
,
2449 enum dwarf_attribute
,
2451 static void add_AT_loc
PROTO((dw_die_ref
,
2452 enum dwarf_attribute
,
2454 static void add_AT_addr
PROTO((dw_die_ref
,
2455 enum dwarf_attribute
, char *));
2456 static void add_AT_lbl_id
PROTO((dw_die_ref
,
2457 enum dwarf_attribute
, char *));
2458 static void add_AT_section_offset
PROTO((dw_die_ref
,
2459 enum dwarf_attribute
, char *));
2460 static int is_extern_subr_die
PROTO((dw_die_ref
));
2461 static dw_attr_ref get_AT
PROTO((dw_die_ref
,
2462 enum dwarf_attribute
));
2463 static char *get_AT_low_pc
PROTO((dw_die_ref
));
2464 static char *get_AT_hi_pc
PROTO((dw_die_ref
));
2465 static char *get_AT_string
PROTO((dw_die_ref
,
2466 enum dwarf_attribute
));
2467 static int get_AT_flag
PROTO((dw_die_ref
,
2468 enum dwarf_attribute
));
2469 static unsigned get_AT_unsigned
PROTO((dw_die_ref
,
2470 enum dwarf_attribute
));
2471 static int is_c_family
PROTO((void));
2472 static int is_fortran
PROTO((void));
2473 static void remove_AT
PROTO((dw_die_ref
,
2474 enum dwarf_attribute
));
2475 static void remove_children
PROTO((dw_die_ref
));
2476 static void add_child_die
PROTO((dw_die_ref
, dw_die_ref
));
2477 static dw_die_ref new_die
PROTO((enum dwarf_tag
, dw_die_ref
));
2478 static dw_die_ref lookup_type_die
PROTO((tree
));
2479 static void equate_type_number_to_die
PROTO((tree
, dw_die_ref
));
2480 static dw_die_ref lookup_decl_die
PROTO((tree
));
2481 static void equate_decl_number_to_die
PROTO((tree
, dw_die_ref
));
2482 static dw_loc_descr_ref new_loc_descr
PROTO((enum dwarf_location_atom
,
2483 unsigned long, unsigned long));
2484 static void add_loc_descr
PROTO((dw_loc_descr_ref
*,
2486 static void print_spaces
PROTO((FILE *));
2487 static void print_die
PROTO((dw_die_ref
, FILE *));
2488 static void print_dwarf_line_table
PROTO((FILE *));
2489 static void add_sibling_attributes
PROTO((dw_die_ref
));
2490 static void build_abbrev_table
PROTO((dw_die_ref
));
2491 static unsigned long size_of_string
PROTO((char *));
2492 static unsigned long size_of_loc_descr
PROTO((dw_loc_descr_ref
));
2493 static unsigned long size_of_locs
PROTO((dw_loc_descr_ref
));
2494 static int constant_size
PROTO((long unsigned));
2495 static unsigned long size_of_die
PROTO((dw_die_ref
));
2496 static void calc_die_sizes
PROTO((dw_die_ref
));
2497 static unsigned long size_of_line_prolog
PROTO((void));
2498 static unsigned long size_of_line_info
PROTO((void));
2499 static unsigned long size_of_pubnames
PROTO((void));
2500 static unsigned long size_of_aranges
PROTO((void));
2501 static enum dwarf_form value_format
PROTO((dw_val_ref
));
2502 static void output_value_format
PROTO((dw_val_ref
));
2503 static void output_abbrev_section
PROTO((void));
2504 static void output_loc_operands
PROTO((dw_loc_descr_ref
));
2505 static unsigned long sibling_offset
PROTO((dw_die_ref
));
2506 static void output_die
PROTO((dw_die_ref
));
2507 static void output_compilation_unit_header
PROTO((void));
2508 static char *dwarf2_name
PROTO((tree
, int));
2509 static void add_pubname
PROTO((tree
, dw_die_ref
));
2510 static void output_pubnames
PROTO((void));
2511 static void add_arange
PROTO((tree
, dw_die_ref
));
2512 static void output_aranges
PROTO((void));
2513 static void output_line_info
PROTO((void));
2514 static int is_body_block
PROTO((tree
));
2515 static dw_die_ref base_type_die
PROTO((tree
));
2516 static tree root_type
PROTO((tree
));
2517 static int is_base_type
PROTO((tree
));
2518 static dw_die_ref modified_type_die
PROTO((tree
, int, int, dw_die_ref
));
2519 static int type_is_enum
PROTO((tree
));
2520 static dw_loc_descr_ref reg_loc_descriptor
PROTO((rtx
));
2521 static dw_loc_descr_ref based_loc_descr
PROTO((unsigned, long));
2522 static int is_based_loc
PROTO((rtx
));
2523 static dw_loc_descr_ref mem_loc_descriptor
PROTO((rtx
));
2524 static dw_loc_descr_ref concat_loc_descriptor
PROTO((rtx
, rtx
));
2525 static dw_loc_descr_ref loc_descriptor
PROTO((rtx
));
2526 static unsigned ceiling
PROTO((unsigned, unsigned));
2527 static tree field_type
PROTO((tree
));
2528 static unsigned simple_type_align_in_bits
PROTO((tree
));
2529 static unsigned simple_type_size_in_bits
PROTO((tree
));
2530 static unsigned field_byte_offset
PROTO((tree
));
2531 static void add_AT_location_description
PROTO((dw_die_ref
,
2532 enum dwarf_attribute
, rtx
));
2533 static void add_data_member_location_attribute
PROTO((dw_die_ref
, tree
));
2534 static void add_const_value_attribute
PROTO((dw_die_ref
, rtx
));
2535 static void add_location_or_const_value_attribute
PROTO((dw_die_ref
, tree
));
2536 static void add_name_attribute
PROTO((dw_die_ref
, char *));
2537 static void add_bound_info
PROTO((dw_die_ref
,
2538 enum dwarf_attribute
, tree
));
2539 static void add_subscript_info
PROTO((dw_die_ref
, tree
));
2540 static void add_byte_size_attribute
PROTO((dw_die_ref
, tree
));
2541 static void add_bit_offset_attribute
PROTO((dw_die_ref
, tree
));
2542 static void add_bit_size_attribute
PROTO((dw_die_ref
, tree
));
2543 static void add_prototyped_attribute
PROTO((dw_die_ref
, tree
));
2544 static void add_abstract_origin_attribute
PROTO((dw_die_ref
, tree
));
2545 static void add_pure_or_virtual_attribute
PROTO((dw_die_ref
, tree
));
2546 static void add_src_coords_attributes
PROTO((dw_die_ref
, tree
));
2547 static void add_name_and_src_coords_attributes
PROTO((dw_die_ref
, tree
));
2548 static void push_decl_scope
PROTO((tree
));
2549 static dw_die_ref scope_die_for
PROTO((tree
, dw_die_ref
));
2550 static void pop_decl_scope
PROTO((void));
2551 static void add_type_attribute
PROTO((dw_die_ref
, tree
, int, int,
2553 static char *type_tag
PROTO((tree
));
2554 static tree member_declared_type
PROTO((tree
));
2556 static char *decl_start_label
PROTO((tree
));
2558 static void gen_array_type_die
PROTO((tree
, dw_die_ref
));
2559 static void gen_set_type_die
PROTO((tree
, dw_die_ref
));
2561 static void gen_entry_point_die
PROTO((tree
, dw_die_ref
));
2563 static void pend_type
PROTO((tree
));
2564 static void output_pending_types_for_scope
PROTO((dw_die_ref
));
2565 static void gen_inlined_enumeration_type_die
PROTO((tree
, dw_die_ref
));
2566 static void gen_inlined_structure_type_die
PROTO((tree
, dw_die_ref
));
2567 static void gen_inlined_union_type_die
PROTO((tree
, dw_die_ref
));
2568 static void gen_enumeration_type_die
PROTO((tree
, dw_die_ref
));
2569 static dw_die_ref gen_formal_parameter_die
PROTO((tree
, dw_die_ref
));
2570 static void gen_unspecified_parameters_die
PROTO((tree
, dw_die_ref
));
2571 static void gen_formal_types_die
PROTO((tree
, dw_die_ref
));
2572 static void gen_subprogram_die
PROTO((tree
, dw_die_ref
));
2573 static void gen_variable_die
PROTO((tree
, dw_die_ref
));
2574 static void gen_label_die
PROTO((tree
, dw_die_ref
));
2575 static void gen_lexical_block_die
PROTO((tree
, dw_die_ref
, int));
2576 static void gen_inlined_subroutine_die
PROTO((tree
, dw_die_ref
, int));
2577 static void gen_field_die
PROTO((tree
, dw_die_ref
));
2578 static void gen_ptr_to_mbr_type_die
PROTO((tree
, dw_die_ref
));
2579 static void gen_compile_unit_die
PROTO((char *));
2580 static void gen_string_type_die
PROTO((tree
, dw_die_ref
));
2581 static void gen_inheritance_die
PROTO((tree
, dw_die_ref
));
2582 static void gen_member_die
PROTO((tree
, dw_die_ref
));
2583 static void gen_struct_or_union_type_die
PROTO((tree
, dw_die_ref
));
2584 static void gen_subroutine_type_die
PROTO((tree
, dw_die_ref
));
2585 static void gen_typedef_die
PROTO((tree
, dw_die_ref
));
2586 static void gen_type_die
PROTO((tree
, dw_die_ref
));
2587 static void gen_tagged_type_instantiation_die
PROTO((tree
, dw_die_ref
));
2588 static void gen_block_die
PROTO((tree
, dw_die_ref
, int));
2589 static void decls_for_scope
PROTO((tree
, dw_die_ref
, int));
2590 static int is_redundant_typedef
PROTO((tree
));
2591 static void gen_decl_die
PROTO((tree
, dw_die_ref
));
2592 static unsigned lookup_filename
PROTO((char *));
2594 /* Section names used to hold DWARF debugging information. */
2595 #ifndef DEBUG_INFO_SECTION
2596 #define DEBUG_INFO_SECTION ".debug_info"
2598 #ifndef ABBREV_SECTION
2599 #define ABBREV_SECTION ".debug_abbrev"
2601 #ifndef ARANGES_SECTION
2602 #define ARANGES_SECTION ".debug_aranges"
2604 #ifndef DW_MACINFO_SECTION
2605 #define DW_MACINFO_SECTION ".debug_macinfo"
2607 #ifndef DEBUG_LINE_SECTION
2608 #define DEBUG_LINE_SECTION ".debug_line"
2611 #define LOC_SECTION ".debug_loc"
2613 #ifndef PUBNAMES_SECTION
2614 #define PUBNAMES_SECTION ".debug_pubnames"
2617 #define STR_SECTION ".debug_str"
2620 /* Standard ELF section names for compiled code and data. */
2621 #ifndef TEXT_SECTION
2622 #define TEXT_SECTION ".text"
2624 #ifndef DATA_SECTION
2625 #define DATA_SECTION ".data"
2628 #define BSS_SECTION ".bss"
2632 /* Definitions of defaults for formats and names of various special
2633 (artificial) labels which may be generated within this file (when the -g
2634 options is used and DWARF_DEBUGGING_INFO is in effect.
2635 If necessary, these may be overridden from within the tm.h file, but
2636 typically, overriding these defaults is unnecessary. */
2638 static char text_end_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
2640 #ifndef TEXT_END_LABEL
2641 #define TEXT_END_LABEL "Letext"
2643 #ifndef DATA_END_LABEL
2644 #define DATA_END_LABEL "Ledata"
2646 #ifndef BSS_END_LABEL
2647 #define BSS_END_LABEL "Lebss"
2649 #ifndef INSN_LABEL_FMT
2650 #define INSN_LABEL_FMT "LI%u_"
2652 #ifndef BLOCK_BEGIN_LABEL
2653 #define BLOCK_BEGIN_LABEL "LBB"
2655 #ifndef BLOCK_END_LABEL
2656 #define BLOCK_END_LABEL "LBE"
2658 #ifndef BODY_BEGIN_LABEL
2659 #define BODY_BEGIN_LABEL "Lbb"
2661 #ifndef BODY_END_LABEL
2662 #define BODY_END_LABEL "Lbe"
2664 #ifndef LINE_CODE_LABEL
2665 #define LINE_CODE_LABEL "LM"
2667 #ifndef SEPARATE_LINE_CODE_LABEL
2668 #define SEPARATE_LINE_CODE_LABEL "LSM"
2671 /* Convert a reference to the assembler name of a C-level name. This
2672 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2673 a string rather than writing to a file. */
2674 #ifndef ASM_NAME_TO_STRING
2675 #define ASM_NAME_TO_STRING(STR, NAME) \
2677 if ((NAME)[0] == '*') \
2678 dyn_string_append (STR, NAME + 1); \
2681 dyn_string_append (STR, user_label_prefix); \
2682 dyn_string_append (STR, NAME); \
2688 /* Convert an integer constant expression into assembler syntax. Addition
2689 and subtraction are the only arithmetic that may appear in these
2690 expressions. This is an adaptation of output_addr_const in final.c.
2691 Here, the target of the conversion is a string buffer. We can't use
2692 output_addr_const directly, because it writes to a file. */
2695 addr_const_to_string (str
, x
)
2702 switch (GET_CODE (x
))
2706 dyn_string_append (str
, ",");
2712 ASM_NAME_TO_STRING (str
, XSTR (x
, 0));
2716 ASM_GENERATE_INTERNAL_LABEL (buf1
, "L", CODE_LABEL_NUMBER (XEXP (x
, 0)));
2717 ASM_NAME_TO_STRING (str
, buf1
);
2721 ASM_GENERATE_INTERNAL_LABEL (buf1
, "L", CODE_LABEL_NUMBER (x
));
2722 ASM_NAME_TO_STRING (str
, buf1
);
2726 sprintf (buf1
, HOST_WIDE_INT_PRINT_DEC
, INTVAL (x
));
2727 dyn_string_append (str
, buf1
);
2731 /* This used to output parentheses around the expression, but that does
2732 not work on the 386 (either ATT or BSD assembler). */
2733 addr_const_to_string (str
, XEXP (x
, 0));
2737 if (GET_MODE (x
) == VOIDmode
)
2739 /* We can use %d if the number is one word and positive. */
2740 if (CONST_DOUBLE_HIGH (x
))
2741 sprintf (buf1
, HOST_WIDE_INT_PRINT_DOUBLE_HEX
,
2742 CONST_DOUBLE_HIGH (x
), CONST_DOUBLE_LOW (x
));
2743 else if (CONST_DOUBLE_LOW (x
) < 0)
2744 sprintf (buf1
, HOST_WIDE_INT_PRINT_HEX
, CONST_DOUBLE_LOW (x
));
2746 sprintf (buf1
, HOST_WIDE_INT_PRINT_DEC
,
2747 CONST_DOUBLE_LOW (x
));
2748 dyn_string_append (str
, buf1
);
2751 /* We can't handle floating point constants; PRINT_OPERAND must
2753 output_operand_lossage ("floating constant misused");
2757 /* Some assemblers need integer constants to appear last (eg masm). */
2758 if (GET_CODE (XEXP (x
, 0)) == CONST_INT
)
2760 addr_const_to_string (str
, XEXP (x
, 1));
2761 if (INTVAL (XEXP (x
, 0)) >= 0)
2762 dyn_string_append (str
, "+");
2764 addr_const_to_string (str
, XEXP (x
, 0));
2768 addr_const_to_string (str
, XEXP (x
, 0));
2769 if (INTVAL (XEXP (x
, 1)) >= 0)
2770 dyn_string_append (str
, "+");
2772 addr_const_to_string (str
, XEXP (x
, 1));
2777 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2778 can't handle that. */
2779 x
= simplify_subtraction (x
);
2780 if (GET_CODE (x
) != MINUS
)
2783 addr_const_to_string (str
, XEXP (x
, 0));
2784 dyn_string_append (str
, "-");
2785 if (GET_CODE (XEXP (x
, 1)) == CONST_INT
2786 && INTVAL (XEXP (x
, 1)) < 0)
2788 dyn_string_append (str
, ASM_OPEN_PAREN
);
2789 addr_const_to_string (str
, XEXP (x
, 1));
2790 dyn_string_append (str
, ASM_CLOSE_PAREN
);
2793 addr_const_to_string (str
, XEXP (x
, 1));
2798 addr_const_to_string (str
, XEXP (x
, 0));
2802 output_operand_lossage ("invalid expression as operand");
2806 /* Convert an address constant to a string, and return a pointer to
2807 a copy of the result, located on the heap. */
2813 dyn_string_t ds
= dyn_string_new (256);
2816 addr_const_to_string (ds
, x
);
2818 /* Return the dynamically allocated string, but free the
2819 dyn_string_t itself. */
2825 /* Test if rtl node points to a pseudo register. */
2831 return (((GET_CODE (rtl
) == REG
) && (REGNO (rtl
) >= FIRST_PSEUDO_REGISTER
))
2832 || ((GET_CODE (rtl
) == SUBREG
)
2833 && (REGNO (XEXP (rtl
, 0)) >= FIRST_PSEUDO_REGISTER
)));
2836 /* Return a reference to a type, with its const and volatile qualifiers
2840 type_main_variant (type
)
2843 type
= TYPE_MAIN_VARIANT (type
);
2845 /* There really should be only one main variant among any group of variants
2846 of a given type (and all of the MAIN_VARIANT values for all members of
2847 the group should point to that one type) but sometimes the C front-end
2848 messes this up for array types, so we work around that bug here. */
2850 if (TREE_CODE (type
) == ARRAY_TYPE
)
2851 while (type
!= TYPE_MAIN_VARIANT (type
))
2852 type
= TYPE_MAIN_VARIANT (type
);
2857 /* Return non-zero if the given type node represents a tagged type. */
2860 is_tagged_type (type
)
2863 register enum tree_code code
= TREE_CODE (type
);
2865 return (code
== RECORD_TYPE
|| code
== UNION_TYPE
2866 || code
== QUAL_UNION_TYPE
|| code
== ENUMERAL_TYPE
);
2869 /* Convert a DIE tag into its string name. */
2872 dwarf_tag_name (tag
)
2873 register unsigned tag
;
2877 case DW_TAG_padding
:
2878 return "DW_TAG_padding";
2879 case DW_TAG_array_type
:
2880 return "DW_TAG_array_type";
2881 case DW_TAG_class_type
:
2882 return "DW_TAG_class_type";
2883 case DW_TAG_entry_point
:
2884 return "DW_TAG_entry_point";
2885 case DW_TAG_enumeration_type
:
2886 return "DW_TAG_enumeration_type";
2887 case DW_TAG_formal_parameter
:
2888 return "DW_TAG_formal_parameter";
2889 case DW_TAG_imported_declaration
:
2890 return "DW_TAG_imported_declaration";
2892 return "DW_TAG_label";
2893 case DW_TAG_lexical_block
:
2894 return "DW_TAG_lexical_block";
2896 return "DW_TAG_member";
2897 case DW_TAG_pointer_type
:
2898 return "DW_TAG_pointer_type";
2899 case DW_TAG_reference_type
:
2900 return "DW_TAG_reference_type";
2901 case DW_TAG_compile_unit
:
2902 return "DW_TAG_compile_unit";
2903 case DW_TAG_string_type
:
2904 return "DW_TAG_string_type";
2905 case DW_TAG_structure_type
:
2906 return "DW_TAG_structure_type";
2907 case DW_TAG_subroutine_type
:
2908 return "DW_TAG_subroutine_type";
2909 case DW_TAG_typedef
:
2910 return "DW_TAG_typedef";
2911 case DW_TAG_union_type
:
2912 return "DW_TAG_union_type";
2913 case DW_TAG_unspecified_parameters
:
2914 return "DW_TAG_unspecified_parameters";
2915 case DW_TAG_variant
:
2916 return "DW_TAG_variant";
2917 case DW_TAG_common_block
:
2918 return "DW_TAG_common_block";
2919 case DW_TAG_common_inclusion
:
2920 return "DW_TAG_common_inclusion";
2921 case DW_TAG_inheritance
:
2922 return "DW_TAG_inheritance";
2923 case DW_TAG_inlined_subroutine
:
2924 return "DW_TAG_inlined_subroutine";
2926 return "DW_TAG_module";
2927 case DW_TAG_ptr_to_member_type
:
2928 return "DW_TAG_ptr_to_member_type";
2929 case DW_TAG_set_type
:
2930 return "DW_TAG_set_type";
2931 case DW_TAG_subrange_type
:
2932 return "DW_TAG_subrange_type";
2933 case DW_TAG_with_stmt
:
2934 return "DW_TAG_with_stmt";
2935 case DW_TAG_access_declaration
:
2936 return "DW_TAG_access_declaration";
2937 case DW_TAG_base_type
:
2938 return "DW_TAG_base_type";
2939 case DW_TAG_catch_block
:
2940 return "DW_TAG_catch_block";
2941 case DW_TAG_const_type
:
2942 return "DW_TAG_const_type";
2943 case DW_TAG_constant
:
2944 return "DW_TAG_constant";
2945 case DW_TAG_enumerator
:
2946 return "DW_TAG_enumerator";
2947 case DW_TAG_file_type
:
2948 return "DW_TAG_file_type";
2950 return "DW_TAG_friend";
2951 case DW_TAG_namelist
:
2952 return "DW_TAG_namelist";
2953 case DW_TAG_namelist_item
:
2954 return "DW_TAG_namelist_item";
2955 case DW_TAG_packed_type
:
2956 return "DW_TAG_packed_type";
2957 case DW_TAG_subprogram
:
2958 return "DW_TAG_subprogram";
2959 case DW_TAG_template_type_param
:
2960 return "DW_TAG_template_type_param";
2961 case DW_TAG_template_value_param
:
2962 return "DW_TAG_template_value_param";
2963 case DW_TAG_thrown_type
:
2964 return "DW_TAG_thrown_type";
2965 case DW_TAG_try_block
:
2966 return "DW_TAG_try_block";
2967 case DW_TAG_variant_part
:
2968 return "DW_TAG_variant_part";
2969 case DW_TAG_variable
:
2970 return "DW_TAG_variable";
2971 case DW_TAG_volatile_type
:
2972 return "DW_TAG_volatile_type";
2973 case DW_TAG_MIPS_loop
:
2974 return "DW_TAG_MIPS_loop";
2975 case DW_TAG_format_label
:
2976 return "DW_TAG_format_label";
2977 case DW_TAG_function_template
:
2978 return "DW_TAG_function_template";
2979 case DW_TAG_class_template
:
2980 return "DW_TAG_class_template";
2982 return "DW_TAG_<unknown>";
2986 /* Convert a DWARF attribute code into its string name. */
2989 dwarf_attr_name (attr
)
2990 register unsigned attr
;
2995 return "DW_AT_sibling";
2996 case DW_AT_location
:
2997 return "DW_AT_location";
2999 return "DW_AT_name";
3000 case DW_AT_ordering
:
3001 return "DW_AT_ordering";
3002 case DW_AT_subscr_data
:
3003 return "DW_AT_subscr_data";
3004 case DW_AT_byte_size
:
3005 return "DW_AT_byte_size";
3006 case DW_AT_bit_offset
:
3007 return "DW_AT_bit_offset";
3008 case DW_AT_bit_size
:
3009 return "DW_AT_bit_size";
3010 case DW_AT_element_list
:
3011 return "DW_AT_element_list";
3012 case DW_AT_stmt_list
:
3013 return "DW_AT_stmt_list";
3015 return "DW_AT_low_pc";
3017 return "DW_AT_high_pc";
3018 case DW_AT_language
:
3019 return "DW_AT_language";
3021 return "DW_AT_member";
3023 return "DW_AT_discr";
3024 case DW_AT_discr_value
:
3025 return "DW_AT_discr_value";
3026 case DW_AT_visibility
:
3027 return "DW_AT_visibility";
3029 return "DW_AT_import";
3030 case DW_AT_string_length
:
3031 return "DW_AT_string_length";
3032 case DW_AT_common_reference
:
3033 return "DW_AT_common_reference";
3034 case DW_AT_comp_dir
:
3035 return "DW_AT_comp_dir";
3036 case DW_AT_const_value
:
3037 return "DW_AT_const_value";
3038 case DW_AT_containing_type
:
3039 return "DW_AT_containing_type";
3040 case DW_AT_default_value
:
3041 return "DW_AT_default_value";
3043 return "DW_AT_inline";
3044 case DW_AT_is_optional
:
3045 return "DW_AT_is_optional";
3046 case DW_AT_lower_bound
:
3047 return "DW_AT_lower_bound";
3048 case DW_AT_producer
:
3049 return "DW_AT_producer";
3050 case DW_AT_prototyped
:
3051 return "DW_AT_prototyped";
3052 case DW_AT_return_addr
:
3053 return "DW_AT_return_addr";
3054 case DW_AT_start_scope
:
3055 return "DW_AT_start_scope";
3056 case DW_AT_stride_size
:
3057 return "DW_AT_stride_size";
3058 case DW_AT_upper_bound
:
3059 return "DW_AT_upper_bound";
3060 case DW_AT_abstract_origin
:
3061 return "DW_AT_abstract_origin";
3062 case DW_AT_accessibility
:
3063 return "DW_AT_accessibility";
3064 case DW_AT_address_class
:
3065 return "DW_AT_address_class";
3066 case DW_AT_artificial
:
3067 return "DW_AT_artificial";
3068 case DW_AT_base_types
:
3069 return "DW_AT_base_types";
3070 case DW_AT_calling_convention
:
3071 return "DW_AT_calling_convention";
3073 return "DW_AT_count";
3074 case DW_AT_data_member_location
:
3075 return "DW_AT_data_member_location";
3076 case DW_AT_decl_column
:
3077 return "DW_AT_decl_column";
3078 case DW_AT_decl_file
:
3079 return "DW_AT_decl_file";
3080 case DW_AT_decl_line
:
3081 return "DW_AT_decl_line";
3082 case DW_AT_declaration
:
3083 return "DW_AT_declaration";
3084 case DW_AT_discr_list
:
3085 return "DW_AT_discr_list";
3086 case DW_AT_encoding
:
3087 return "DW_AT_encoding";
3088 case DW_AT_external
:
3089 return "DW_AT_external";
3090 case DW_AT_frame_base
:
3091 return "DW_AT_frame_base";
3093 return "DW_AT_friend";
3094 case DW_AT_identifier_case
:
3095 return "DW_AT_identifier_case";
3096 case DW_AT_macro_info
:
3097 return "DW_AT_macro_info";
3098 case DW_AT_namelist_items
:
3099 return "DW_AT_namelist_items";
3100 case DW_AT_priority
:
3101 return "DW_AT_priority";
3103 return "DW_AT_segment";
3104 case DW_AT_specification
:
3105 return "DW_AT_specification";
3106 case DW_AT_static_link
:
3107 return "DW_AT_static_link";
3109 return "DW_AT_type";
3110 case DW_AT_use_location
:
3111 return "DW_AT_use_location";
3112 case DW_AT_variable_parameter
:
3113 return "DW_AT_variable_parameter";
3114 case DW_AT_virtuality
:
3115 return "DW_AT_virtuality";
3116 case DW_AT_vtable_elem_location
:
3117 return "DW_AT_vtable_elem_location";
3119 case DW_AT_MIPS_fde
:
3120 return "DW_AT_MIPS_fde";
3121 case DW_AT_MIPS_loop_begin
:
3122 return "DW_AT_MIPS_loop_begin";
3123 case DW_AT_MIPS_tail_loop_begin
:
3124 return "DW_AT_MIPS_tail_loop_begin";
3125 case DW_AT_MIPS_epilog_begin
:
3126 return "DW_AT_MIPS_epilog_begin";
3127 case DW_AT_MIPS_loop_unroll_factor
:
3128 return "DW_AT_MIPS_loop_unroll_factor";
3129 case DW_AT_MIPS_software_pipeline_depth
:
3130 return "DW_AT_MIPS_software_pipeline_depth";
3131 case DW_AT_MIPS_linkage_name
:
3132 return "DW_AT_MIPS_linkage_name";
3133 case DW_AT_MIPS_stride
:
3134 return "DW_AT_MIPS_stride";
3135 case DW_AT_MIPS_abstract_name
:
3136 return "DW_AT_MIPS_abstract_name";
3137 case DW_AT_MIPS_clone_origin
:
3138 return "DW_AT_MIPS_clone_origin";
3139 case DW_AT_MIPS_has_inlines
:
3140 return "DW_AT_MIPS_has_inlines";
3142 case DW_AT_sf_names
:
3143 return "DW_AT_sf_names";
3144 case DW_AT_src_info
:
3145 return "DW_AT_src_info";
3146 case DW_AT_mac_info
:
3147 return "DW_AT_mac_info";
3148 case DW_AT_src_coords
:
3149 return "DW_AT_src_coords";
3150 case DW_AT_body_begin
:
3151 return "DW_AT_body_begin";
3152 case DW_AT_body_end
:
3153 return "DW_AT_body_end";
3155 return "DW_AT_<unknown>";
3159 /* Convert a DWARF value form code into its string name. */
3162 dwarf_form_name (form
)
3163 register unsigned form
;
3168 return "DW_FORM_addr";
3169 case DW_FORM_block2
:
3170 return "DW_FORM_block2";
3171 case DW_FORM_block4
:
3172 return "DW_FORM_block4";
3174 return "DW_FORM_data2";
3176 return "DW_FORM_data4";
3178 return "DW_FORM_data8";
3179 case DW_FORM_string
:
3180 return "DW_FORM_string";
3182 return "DW_FORM_block";
3183 case DW_FORM_block1
:
3184 return "DW_FORM_block1";
3186 return "DW_FORM_data1";
3188 return "DW_FORM_flag";
3190 return "DW_FORM_sdata";
3192 return "DW_FORM_strp";
3194 return "DW_FORM_udata";
3195 case DW_FORM_ref_addr
:
3196 return "DW_FORM_ref_addr";
3198 return "DW_FORM_ref1";
3200 return "DW_FORM_ref2";
3202 return "DW_FORM_ref4";
3204 return "DW_FORM_ref8";
3205 case DW_FORM_ref_udata
:
3206 return "DW_FORM_ref_udata";
3207 case DW_FORM_indirect
:
3208 return "DW_FORM_indirect";
3210 return "DW_FORM_<unknown>";
3214 /* Convert a DWARF stack opcode into its string name. */
3217 dwarf_stack_op_name (op
)
3218 register unsigned op
;
3223 return "DW_OP_addr";
3225 return "DW_OP_deref";
3227 return "DW_OP_const1u";
3229 return "DW_OP_const1s";
3231 return "DW_OP_const2u";
3233 return "DW_OP_const2s";
3235 return "DW_OP_const4u";
3237 return "DW_OP_const4s";
3239 return "DW_OP_const8u";
3241 return "DW_OP_const8s";
3243 return "DW_OP_constu";
3245 return "DW_OP_consts";
3249 return "DW_OP_drop";
3251 return "DW_OP_over";
3253 return "DW_OP_pick";
3255 return "DW_OP_swap";
3259 return "DW_OP_xderef";
3267 return "DW_OP_minus";
3279 return "DW_OP_plus";
3280 case DW_OP_plus_uconst
:
3281 return "DW_OP_plus_uconst";
3287 return "DW_OP_shra";
3305 return "DW_OP_skip";
3307 return "DW_OP_lit0";
3309 return "DW_OP_lit1";
3311 return "DW_OP_lit2";
3313 return "DW_OP_lit3";
3315 return "DW_OP_lit4";
3317 return "DW_OP_lit5";
3319 return "DW_OP_lit6";
3321 return "DW_OP_lit7";
3323 return "DW_OP_lit8";
3325 return "DW_OP_lit9";
3327 return "DW_OP_lit10";
3329 return "DW_OP_lit11";
3331 return "DW_OP_lit12";
3333 return "DW_OP_lit13";
3335 return "DW_OP_lit14";
3337 return "DW_OP_lit15";
3339 return "DW_OP_lit16";
3341 return "DW_OP_lit17";
3343 return "DW_OP_lit18";
3345 return "DW_OP_lit19";
3347 return "DW_OP_lit20";
3349 return "DW_OP_lit21";
3351 return "DW_OP_lit22";
3353 return "DW_OP_lit23";
3355 return "DW_OP_lit24";
3357 return "DW_OP_lit25";
3359 return "DW_OP_lit26";
3361 return "DW_OP_lit27";
3363 return "DW_OP_lit28";
3365 return "DW_OP_lit29";
3367 return "DW_OP_lit30";
3369 return "DW_OP_lit31";
3371 return "DW_OP_reg0";
3373 return "DW_OP_reg1";
3375 return "DW_OP_reg2";
3377 return "DW_OP_reg3";
3379 return "DW_OP_reg4";
3381 return "DW_OP_reg5";
3383 return "DW_OP_reg6";
3385 return "DW_OP_reg7";
3387 return "DW_OP_reg8";
3389 return "DW_OP_reg9";
3391 return "DW_OP_reg10";
3393 return "DW_OP_reg11";
3395 return "DW_OP_reg12";
3397 return "DW_OP_reg13";
3399 return "DW_OP_reg14";
3401 return "DW_OP_reg15";
3403 return "DW_OP_reg16";
3405 return "DW_OP_reg17";
3407 return "DW_OP_reg18";
3409 return "DW_OP_reg19";
3411 return "DW_OP_reg20";
3413 return "DW_OP_reg21";
3415 return "DW_OP_reg22";
3417 return "DW_OP_reg23";
3419 return "DW_OP_reg24";
3421 return "DW_OP_reg25";
3423 return "DW_OP_reg26";
3425 return "DW_OP_reg27";
3427 return "DW_OP_reg28";
3429 return "DW_OP_reg29";
3431 return "DW_OP_reg30";
3433 return "DW_OP_reg31";
3435 return "DW_OP_breg0";
3437 return "DW_OP_breg1";
3439 return "DW_OP_breg2";
3441 return "DW_OP_breg3";
3443 return "DW_OP_breg4";
3445 return "DW_OP_breg5";
3447 return "DW_OP_breg6";
3449 return "DW_OP_breg7";
3451 return "DW_OP_breg8";
3453 return "DW_OP_breg9";
3455 return "DW_OP_breg10";
3457 return "DW_OP_breg11";
3459 return "DW_OP_breg12";
3461 return "DW_OP_breg13";
3463 return "DW_OP_breg14";
3465 return "DW_OP_breg15";
3467 return "DW_OP_breg16";
3469 return "DW_OP_breg17";
3471 return "DW_OP_breg18";
3473 return "DW_OP_breg19";
3475 return "DW_OP_breg20";
3477 return "DW_OP_breg21";
3479 return "DW_OP_breg22";
3481 return "DW_OP_breg23";
3483 return "DW_OP_breg24";
3485 return "DW_OP_breg25";
3487 return "DW_OP_breg26";
3489 return "DW_OP_breg27";
3491 return "DW_OP_breg28";
3493 return "DW_OP_breg29";
3495 return "DW_OP_breg30";
3497 return "DW_OP_breg31";
3499 return "DW_OP_regx";
3501 return "DW_OP_fbreg";
3503 return "DW_OP_bregx";
3505 return "DW_OP_piece";
3506 case DW_OP_deref_size
:
3507 return "DW_OP_deref_size";
3508 case DW_OP_xderef_size
:
3509 return "DW_OP_xderef_size";
3513 return "OP_<unknown>";
3517 /* Convert a DWARF type code into its string name. */
3521 dwarf_type_encoding_name (enc
)
3522 register unsigned enc
;
3526 case DW_ATE_address
:
3527 return "DW_ATE_address";
3528 case DW_ATE_boolean
:
3529 return "DW_ATE_boolean";
3530 case DW_ATE_complex_float
:
3531 return "DW_ATE_complex_float";
3533 return "DW_ATE_float";
3535 return "DW_ATE_signed";
3536 case DW_ATE_signed_char
:
3537 return "DW_ATE_signed_char";
3538 case DW_ATE_unsigned
:
3539 return "DW_ATE_unsigned";
3540 case DW_ATE_unsigned_char
:
3541 return "DW_ATE_unsigned_char";
3543 return "DW_ATE_<unknown>";
3548 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3549 instance of an inlined instance of a decl which is local to an inline
3550 function, so we have to trace all of the way back through the origin chain
3551 to find out what sort of node actually served as the original seed for the
3555 decl_ultimate_origin (decl
)
3558 #ifdef ENABLE_CHECKING
3559 if (DECL_FROM_INLINE (DECL_ORIGIN (decl
)))
3560 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
3561 most distant ancestor, this should never happen. */
3565 return DECL_ABSTRACT_ORIGIN (decl
);
3568 /* Determine the "ultimate origin" of a block. The block may be an inlined
3569 instance of an inlined instance of a block which is local to an inline
3570 function, so we have to trace all of the way back through the origin chain
3571 to find out what sort of node actually served as the original seed for the
3575 block_ultimate_origin (block
)
3576 register tree block
;
3578 register tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
3580 if (immediate_origin
== NULL_TREE
)
3584 register tree ret_val
;
3585 register tree lookahead
= immediate_origin
;
3589 ret_val
= lookahead
;
3590 lookahead
= (TREE_CODE (ret_val
) == BLOCK
)
3591 ? BLOCK_ABSTRACT_ORIGIN (ret_val
)
3594 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
3600 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3601 of a virtual function may refer to a base class, so we check the 'this'
3605 decl_class_context (decl
)
3608 tree context
= NULL_TREE
;
3610 if (TREE_CODE (decl
) != FUNCTION_DECL
|| ! DECL_VINDEX (decl
))
3611 context
= DECL_CONTEXT (decl
);
3613 context
= TYPE_MAIN_VARIANT
3614 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
3616 if (context
&& TREE_CODE_CLASS (TREE_CODE (context
)) != 't')
3617 context
= NULL_TREE
;
3622 /* Add an attribute/value pair to a DIE */
3625 add_dwarf_attr (die
, attr
)
3626 register dw_die_ref die
;
3627 register dw_attr_ref attr
;
3629 if (die
!= NULL
&& attr
!= NULL
)
3631 if (die
->die_attr
== NULL
)
3633 die
->die_attr
= attr
;
3634 die
->die_attr_last
= attr
;
3638 die
->die_attr_last
->dw_attr_next
= attr
;
3639 die
->die_attr_last
= attr
;
3644 /* Add a flag value attribute to a DIE. */
3647 add_AT_flag (die
, attr_kind
, flag
)
3648 register dw_die_ref die
;
3649 register enum dwarf_attribute attr_kind
;
3650 register unsigned flag
;
3652 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3654 attr
->dw_attr_next
= NULL
;
3655 attr
->dw_attr
= attr_kind
;
3656 attr
->dw_attr_val
.val_class
= dw_val_class_flag
;
3657 attr
->dw_attr_val
.v
.val_flag
= flag
;
3658 add_dwarf_attr (die
, attr
);
3661 /* Add a signed integer attribute value to a DIE. */
3664 add_AT_int (die
, attr_kind
, int_val
)
3665 register dw_die_ref die
;
3666 register enum dwarf_attribute attr_kind
;
3667 register long int int_val
;
3669 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3671 attr
->dw_attr_next
= NULL
;
3672 attr
->dw_attr
= attr_kind
;
3673 attr
->dw_attr_val
.val_class
= dw_val_class_const
;
3674 attr
->dw_attr_val
.v
.val_int
= int_val
;
3675 add_dwarf_attr (die
, attr
);
3678 /* Add an unsigned integer attribute value to a DIE. */
3681 add_AT_unsigned (die
, attr_kind
, unsigned_val
)
3682 register dw_die_ref die
;
3683 register enum dwarf_attribute attr_kind
;
3684 register unsigned long unsigned_val
;
3686 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3688 attr
->dw_attr_next
= NULL
;
3689 attr
->dw_attr
= attr_kind
;
3690 attr
->dw_attr_val
.val_class
= dw_val_class_unsigned_const
;
3691 attr
->dw_attr_val
.v
.val_unsigned
= unsigned_val
;
3692 add_dwarf_attr (die
, attr
);
3695 /* Add an unsigned double integer attribute value to a DIE. */
3698 add_AT_long_long (die
, attr_kind
, val_hi
, val_low
)
3699 register dw_die_ref die
;
3700 register enum dwarf_attribute attr_kind
;
3701 register unsigned long val_hi
;
3702 register unsigned long val_low
;
3704 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3706 attr
->dw_attr_next
= NULL
;
3707 attr
->dw_attr
= attr_kind
;
3708 attr
->dw_attr_val
.val_class
= dw_val_class_long_long
;
3709 attr
->dw_attr_val
.v
.val_long_long
.hi
= val_hi
;
3710 attr
->dw_attr_val
.v
.val_long_long
.low
= val_low
;
3711 add_dwarf_attr (die
, attr
);
3714 /* Add a floating point attribute value to a DIE and return it. */
3717 add_AT_float (die
, attr_kind
, length
, array
)
3718 register dw_die_ref die
;
3719 register enum dwarf_attribute attr_kind
;
3720 register unsigned length
;
3721 register long *array
;
3723 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3725 attr
->dw_attr_next
= NULL
;
3726 attr
->dw_attr
= attr_kind
;
3727 attr
->dw_attr_val
.val_class
= dw_val_class_float
;
3728 attr
->dw_attr_val
.v
.val_float
.length
= length
;
3729 attr
->dw_attr_val
.v
.val_float
.array
= array
;
3730 add_dwarf_attr (die
, attr
);
3733 /* Add a string attribute value to a DIE. */
3736 add_AT_string (die
, attr_kind
, str
)
3737 register dw_die_ref die
;
3738 register enum dwarf_attribute attr_kind
;
3741 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3743 attr
->dw_attr_next
= NULL
;
3744 attr
->dw_attr
= attr_kind
;
3745 attr
->dw_attr_val
.val_class
= dw_val_class_str
;
3746 attr
->dw_attr_val
.v
.val_str
= xstrdup (str
);
3747 add_dwarf_attr (die
, attr
);
3750 /* Add a DIE reference attribute value to a DIE. */
3753 add_AT_die_ref (die
, attr_kind
, targ_die
)
3754 register dw_die_ref die
;
3755 register enum dwarf_attribute attr_kind
;
3756 register dw_die_ref targ_die
;
3758 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3760 attr
->dw_attr_next
= NULL
;
3761 attr
->dw_attr
= attr_kind
;
3762 attr
->dw_attr_val
.val_class
= dw_val_class_die_ref
;
3763 attr
->dw_attr_val
.v
.val_die_ref
= targ_die
;
3764 add_dwarf_attr (die
, attr
);
3767 /* Add an FDE reference attribute value to a DIE. */
3770 add_AT_fde_ref (die
, attr_kind
, targ_fde
)
3771 register dw_die_ref die
;
3772 register enum dwarf_attribute attr_kind
;
3773 register unsigned targ_fde
;
3775 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3777 attr
->dw_attr_next
= NULL
;
3778 attr
->dw_attr
= attr_kind
;
3779 attr
->dw_attr_val
.val_class
= dw_val_class_fde_ref
;
3780 attr
->dw_attr_val
.v
.val_fde_index
= targ_fde
;
3781 add_dwarf_attr (die
, attr
);
3784 /* Add a location description attribute value to a DIE. */
3787 add_AT_loc (die
, attr_kind
, loc
)
3788 register dw_die_ref die
;
3789 register enum dwarf_attribute attr_kind
;
3790 register dw_loc_descr_ref loc
;
3792 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3794 attr
->dw_attr_next
= NULL
;
3795 attr
->dw_attr
= attr_kind
;
3796 attr
->dw_attr_val
.val_class
= dw_val_class_loc
;
3797 attr
->dw_attr_val
.v
.val_loc
= loc
;
3798 add_dwarf_attr (die
, attr
);
3801 /* Add an address constant attribute value to a DIE. */
3804 add_AT_addr (die
, attr_kind
, addr
)
3805 register dw_die_ref die
;
3806 register enum dwarf_attribute attr_kind
;
3809 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3811 attr
->dw_attr_next
= NULL
;
3812 attr
->dw_attr
= attr_kind
;
3813 attr
->dw_attr_val
.val_class
= dw_val_class_addr
;
3814 attr
->dw_attr_val
.v
.val_addr
= addr
;
3815 add_dwarf_attr (die
, attr
);
3818 /* Add a label identifier attribute value to a DIE. */
3821 add_AT_lbl_id (die
, attr_kind
, lbl_id
)
3822 register dw_die_ref die
;
3823 register enum dwarf_attribute attr_kind
;
3824 register char *lbl_id
;
3826 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3828 attr
->dw_attr_next
= NULL
;
3829 attr
->dw_attr
= attr_kind
;
3830 attr
->dw_attr_val
.val_class
= dw_val_class_lbl_id
;
3831 attr
->dw_attr_val
.v
.val_lbl_id
= xstrdup (lbl_id
);
3832 add_dwarf_attr (die
, attr
);
3835 /* Add a section offset attribute value to a DIE. */
3838 add_AT_section_offset (die
, attr_kind
, section
)
3839 register dw_die_ref die
;
3840 register enum dwarf_attribute attr_kind
;
3841 register char *section
;
3843 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3845 attr
->dw_attr_next
= NULL
;
3846 attr
->dw_attr
= attr_kind
;
3847 attr
->dw_attr_val
.val_class
= dw_val_class_section_offset
;
3848 attr
->dw_attr_val
.v
.val_section
= section
;
3849 add_dwarf_attr (die
, attr
);
3853 /* Test if die refers to an external subroutine. */
3856 is_extern_subr_die (die
)
3857 register dw_die_ref die
;
3859 register dw_attr_ref a
;
3860 register int is_subr
= FALSE
;
3861 register int is_extern
= FALSE
;
3863 if (die
!= NULL
&& die
->die_tag
== DW_TAG_subprogram
)
3866 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
3868 if (a
->dw_attr
== DW_AT_external
3869 && a
->dw_attr_val
.val_class
== dw_val_class_flag
3870 && a
->dw_attr_val
.v
.val_flag
!= 0)
3878 return is_subr
&& is_extern
;
3881 /* Get the attribute of type attr_kind. */
3883 static inline dw_attr_ref
3884 get_AT (die
, attr_kind
)
3885 register dw_die_ref die
;
3886 register enum dwarf_attribute attr_kind
;
3888 register dw_attr_ref a
;
3889 register dw_die_ref spec
= NULL
;
3893 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
3895 if (a
->dw_attr
== attr_kind
)
3898 if (a
->dw_attr
== DW_AT_specification
3899 || a
->dw_attr
== DW_AT_abstract_origin
)
3900 spec
= a
->dw_attr_val
.v
.val_die_ref
;
3904 return get_AT (spec
, attr_kind
);
3910 /* Return the "low pc" attribute value, typically associated with
3911 a subprogram DIE. Return null if the "low pc" attribute is
3912 either not prsent, or if it cannot be represented as an
3913 assembler label identifier. */
3915 static inline char *
3917 register dw_die_ref die
;
3919 register dw_attr_ref a
= get_AT (die
, DW_AT_low_pc
);
3921 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_lbl_id
)
3922 return a
->dw_attr_val
.v
.val_lbl_id
;
3927 /* Return the "high pc" attribute value, typically associated with
3928 a subprogram DIE. Return null if the "high pc" attribute is
3929 either not prsent, or if it cannot be represented as an
3930 assembler label identifier. */
3932 static inline char *
3934 register dw_die_ref die
;
3936 register dw_attr_ref a
= get_AT (die
, DW_AT_high_pc
);
3938 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_lbl_id
)
3939 return a
->dw_attr_val
.v
.val_lbl_id
;
3944 /* Return the value of the string attribute designated by ATTR_KIND, or
3945 NULL if it is not present. */
3947 static inline char *
3948 get_AT_string (die
, attr_kind
)
3949 register dw_die_ref die
;
3950 register enum dwarf_attribute attr_kind
;
3952 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3954 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_str
)
3955 return a
->dw_attr_val
.v
.val_str
;
3960 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3961 if it is not present. */
3964 get_AT_flag (die
, attr_kind
)
3965 register dw_die_ref die
;
3966 register enum dwarf_attribute attr_kind
;
3968 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3970 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_flag
)
3971 return a
->dw_attr_val
.v
.val_flag
;
3976 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3977 if it is not present. */
3979 static inline unsigned
3980 get_AT_unsigned (die
, attr_kind
)
3981 register dw_die_ref die
;
3982 register enum dwarf_attribute attr_kind
;
3984 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3986 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_unsigned_const
)
3987 return a
->dw_attr_val
.v
.val_unsigned
;
3995 register unsigned lang
= get_AT_unsigned (comp_unit_die
, DW_AT_language
);
3997 return (lang
== DW_LANG_C
|| lang
== DW_LANG_C89
3998 || lang
== DW_LANG_C_plus_plus
);
4004 register unsigned lang
= get_AT_unsigned (comp_unit_die
, DW_AT_language
);
4006 return (lang
== DW_LANG_Fortran77
|| lang
== DW_LANG_Fortran90
);
4009 /* Remove the specified attribute if present. */
4012 remove_AT (die
, attr_kind
)
4013 register dw_die_ref die
;
4014 register enum dwarf_attribute attr_kind
;
4016 register dw_attr_ref a
;
4017 register dw_attr_ref removed
= NULL
;;
4021 if (die
->die_attr
->dw_attr
== attr_kind
)
4023 removed
= die
->die_attr
;
4024 if (die
->die_attr_last
== die
->die_attr
)
4025 die
->die_attr_last
= NULL
;
4027 die
->die_attr
= die
->die_attr
->dw_attr_next
;
4031 for (a
= die
->die_attr
; a
->dw_attr_next
!= NULL
;
4032 a
= a
->dw_attr_next
)
4033 if (a
->dw_attr_next
->dw_attr
== attr_kind
)
4035 removed
= a
->dw_attr_next
;
4036 if (die
->die_attr_last
== a
->dw_attr_next
)
4037 die
->die_attr_last
= a
;
4039 a
->dw_attr_next
= a
->dw_attr_next
->dw_attr_next
;
4048 /* Discard the children of this DIE. */
4051 remove_children (die
)
4052 register dw_die_ref die
;
4054 register dw_die_ref child_die
= die
->die_child
;
4056 die
->die_child
= NULL
;
4057 die
->die_child_last
= NULL
;
4059 while (child_die
!= NULL
)
4061 register dw_die_ref tmp_die
= child_die
;
4062 register dw_attr_ref a
;
4064 child_die
= child_die
->die_sib
;
4066 for (a
= tmp_die
->die_attr
; a
!= NULL
; )
4068 register dw_attr_ref tmp_a
= a
;
4070 a
= a
->dw_attr_next
;
4078 /* Add a child DIE below its parent. */
4081 add_child_die (die
, child_die
)
4082 register dw_die_ref die
;
4083 register dw_die_ref child_die
;
4085 if (die
!= NULL
&& child_die
!= NULL
)
4087 if (die
== child_die
)
4089 child_die
->die_parent
= die
;
4090 child_die
->die_sib
= NULL
;
4092 if (die
->die_child
== NULL
)
4094 die
->die_child
= child_die
;
4095 die
->die_child_last
= child_die
;
4099 die
->die_child_last
->die_sib
= child_die
;
4100 die
->die_child_last
= child_die
;
4105 /* Return a pointer to a newly created DIE node. */
4107 static inline dw_die_ref
4108 new_die (tag_value
, parent_die
)
4109 register enum dwarf_tag tag_value
;
4110 register dw_die_ref parent_die
;
4112 register dw_die_ref die
= (dw_die_ref
) xmalloc (sizeof (die_node
));
4114 die
->die_tag
= tag_value
;
4115 die
->die_abbrev
= 0;
4116 die
->die_offset
= 0;
4117 die
->die_child
= NULL
;
4118 die
->die_parent
= NULL
;
4119 die
->die_sib
= NULL
;
4120 die
->die_child_last
= NULL
;
4121 die
->die_attr
= NULL
;
4122 die
->die_attr_last
= NULL
;
4124 if (parent_die
!= NULL
)
4125 add_child_die (parent_die
, die
);
4128 limbo_die_node
*limbo_node
;
4130 limbo_node
= (limbo_die_node
*) xmalloc (sizeof (limbo_die_node
));
4131 limbo_node
->die
= die
;
4132 limbo_node
->next
= limbo_die_list
;
4133 limbo_die_list
= limbo_node
;
4139 /* Return the DIE associated with the given type specifier. */
4141 static inline dw_die_ref
4142 lookup_type_die (type
)
4145 return (dw_die_ref
) TYPE_SYMTAB_POINTER (type
);
4148 /* Equate a DIE to a given type specifier. */
4151 equate_type_number_to_die (type
, type_die
)
4153 register dw_die_ref type_die
;
4155 TYPE_SYMTAB_POINTER (type
) = (char *) type_die
;
4158 /* Return the DIE associated with a given declaration. */
4160 static inline dw_die_ref
4161 lookup_decl_die (decl
)
4164 register unsigned decl_id
= DECL_UID (decl
);
4166 return (decl_id
< decl_die_table_in_use
4167 ? decl_die_table
[decl_id
] : NULL
);
4170 /* Equate a DIE to a particular declaration. */
4173 equate_decl_number_to_die (decl
, decl_die
)
4175 register dw_die_ref decl_die
;
4177 register unsigned decl_id
= DECL_UID (decl
);
4178 register unsigned num_allocated
;
4180 if (decl_id
>= decl_die_table_allocated
)
4183 = ((decl_id
+ 1 + DECL_DIE_TABLE_INCREMENT
- 1)
4184 / DECL_DIE_TABLE_INCREMENT
)
4185 * DECL_DIE_TABLE_INCREMENT
;
4188 = (dw_die_ref
*) xrealloc (decl_die_table
,
4189 sizeof (dw_die_ref
) * num_allocated
);
4191 bzero ((char *) &decl_die_table
[decl_die_table_allocated
],
4192 (num_allocated
- decl_die_table_allocated
) * sizeof (dw_die_ref
));
4193 decl_die_table_allocated
= num_allocated
;
4196 if (decl_id
>= decl_die_table_in_use
)
4197 decl_die_table_in_use
= (decl_id
+ 1);
4199 decl_die_table
[decl_id
] = decl_die
;
4202 /* Return a pointer to a newly allocated location description. Location
4203 descriptions are simple expression terms that can be strung
4204 together to form more complicated location (address) descriptions. */
4206 static inline dw_loc_descr_ref
4207 new_loc_descr (op
, oprnd1
, oprnd2
)
4208 register enum dwarf_location_atom op
;
4209 register unsigned long oprnd1
;
4210 register unsigned long oprnd2
;
4212 register dw_loc_descr_ref descr
4213 = (dw_loc_descr_ref
) xmalloc (sizeof (dw_loc_descr_node
));
4215 descr
->dw_loc_next
= NULL
;
4216 descr
->dw_loc_opc
= op
;
4217 descr
->dw_loc_oprnd1
.val_class
= dw_val_class_unsigned_const
;
4218 descr
->dw_loc_oprnd1
.v
.val_unsigned
= oprnd1
;
4219 descr
->dw_loc_oprnd2
.val_class
= dw_val_class_unsigned_const
;
4220 descr
->dw_loc_oprnd2
.v
.val_unsigned
= oprnd2
;
4225 /* Add a location description term to a location description expression. */
4228 add_loc_descr (list_head
, descr
)
4229 register dw_loc_descr_ref
*list_head
;
4230 register dw_loc_descr_ref descr
;
4232 register dw_loc_descr_ref
*d
;
4234 /* Find the end of the chain. */
4235 for (d
= list_head
; (*d
) != NULL
; d
= &(*d
)->dw_loc_next
)
4241 /* Keep track of the number of spaces used to indent the
4242 output of the debugging routines that print the structure of
4243 the DIE internal representation. */
4244 static int print_indent
;
4246 /* Indent the line the number of spaces given by print_indent. */
4249 print_spaces (outfile
)
4252 fprintf (outfile
, "%*s", print_indent
, "");
4255 /* Print the information associated with a given DIE, and its children.
4256 This routine is a debugging aid only. */
4259 print_die (die
, outfile
)
4263 register dw_attr_ref a
;
4264 register dw_die_ref c
;
4266 print_spaces (outfile
);
4267 fprintf (outfile
, "DIE %4lu: %s\n",
4268 die
->die_offset
, dwarf_tag_name (die
->die_tag
));
4269 print_spaces (outfile
);
4270 fprintf (outfile
, " abbrev id: %lu", die
->die_abbrev
);
4271 fprintf (outfile
, " offset: %lu\n", die
->die_offset
);
4273 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
4275 print_spaces (outfile
);
4276 fprintf (outfile
, " %s: ", dwarf_attr_name (a
->dw_attr
));
4278 switch (a
->dw_attr_val
.val_class
)
4280 case dw_val_class_addr
:
4281 fprintf (outfile
, "address");
4283 case dw_val_class_loc
:
4284 fprintf (outfile
, "location descriptor");
4286 case dw_val_class_const
:
4287 fprintf (outfile
, "%ld", a
->dw_attr_val
.v
.val_int
);
4289 case dw_val_class_unsigned_const
:
4290 fprintf (outfile
, "%lu", a
->dw_attr_val
.v
.val_unsigned
);
4292 case dw_val_class_long_long
:
4293 fprintf (outfile
, "constant (%lu,%lu)",
4294 a
->dw_attr_val
.v
.val_long_long
.hi
,
4295 a
->dw_attr_val
.v
.val_long_long
.low
);
4297 case dw_val_class_float
:
4298 fprintf (outfile
, "floating-point constant");
4300 case dw_val_class_flag
:
4301 fprintf (outfile
, "%u", a
->dw_attr_val
.v
.val_flag
);
4303 case dw_val_class_die_ref
:
4304 if (a
->dw_attr_val
.v
.val_die_ref
!= NULL
)
4305 fprintf (outfile
, "die -> %lu",
4306 a
->dw_attr_val
.v
.val_die_ref
->die_offset
);
4308 fprintf (outfile
, "die -> <null>");
4310 case dw_val_class_lbl_id
:
4311 fprintf (outfile
, "label: %s", a
->dw_attr_val
.v
.val_lbl_id
);
4313 case dw_val_class_section_offset
:
4314 fprintf (outfile
, "section: %s", a
->dw_attr_val
.v
.val_section
);
4316 case dw_val_class_str
:
4317 if (a
->dw_attr_val
.v
.val_str
!= NULL
)
4318 fprintf (outfile
, "\"%s\"", a
->dw_attr_val
.v
.val_str
);
4320 fprintf (outfile
, "<null>");
4326 fprintf (outfile
, "\n");
4329 if (die
->die_child
!= NULL
)
4332 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4333 print_die (c
, outfile
);
4339 /* Print the contents of the source code line number correspondence table.
4340 This routine is a debugging aid only. */
4343 print_dwarf_line_table (outfile
)
4346 register unsigned i
;
4347 register dw_line_info_ref line_info
;
4349 fprintf (outfile
, "\n\nDWARF source line information\n");
4350 for (i
= 1; i
< line_info_table_in_use
; ++i
)
4352 line_info
= &line_info_table
[i
];
4353 fprintf (outfile
, "%5d: ", i
);
4354 fprintf (outfile
, "%-20s", file_table
[line_info
->dw_file_num
]);
4355 fprintf (outfile
, "%6ld", line_info
->dw_line_num
);
4356 fprintf (outfile
, "\n");
4359 fprintf (outfile
, "\n\n");
4362 /* Print the information collected for a given DIE. */
4365 debug_dwarf_die (die
)
4368 print_die (die
, stderr
);
4371 /* Print all DWARF information collected for the compilation unit.
4372 This routine is a debugging aid only. */
4378 print_die (comp_unit_die
, stderr
);
4379 print_dwarf_line_table (stderr
);
4382 /* Traverse the DIE, and add a sibling attribute if it may have the
4383 effect of speeding up access to siblings. To save some space,
4384 avoid generating sibling attributes for DIE's without children. */
4387 add_sibling_attributes(die
)
4388 register dw_die_ref die
;
4390 register dw_die_ref c
;
4391 register dw_attr_ref attr
;
4392 if (die
!= comp_unit_die
&& die
->die_child
!= NULL
)
4394 attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
4395 attr
->dw_attr_next
= NULL
;
4396 attr
->dw_attr
= DW_AT_sibling
;
4397 attr
->dw_attr_val
.val_class
= dw_val_class_die_ref
;
4398 attr
->dw_attr_val
.v
.val_die_ref
= die
->die_sib
;
4400 /* Add the sibling link to the front of the attribute list. */
4401 attr
->dw_attr_next
= die
->die_attr
;
4402 if (die
->die_attr
== NULL
)
4403 die
->die_attr_last
= attr
;
4405 die
->die_attr
= attr
;
4408 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4409 add_sibling_attributes (c
);
4412 /* The format of each DIE (and its attribute value pairs)
4413 is encoded in an abbreviation table. This routine builds the
4414 abbreviation table and assigns a unique abbreviation id for
4415 each abbreviation entry. The children of each die are visited
4419 build_abbrev_table (die
)
4420 register dw_die_ref die
;
4422 register unsigned long abbrev_id
;
4423 register unsigned long n_alloc
;
4424 register dw_die_ref c
;
4425 register dw_attr_ref d_attr
, a_attr
;
4426 for (abbrev_id
= 1; abbrev_id
< abbrev_die_table_in_use
; ++abbrev_id
)
4428 register dw_die_ref abbrev
= abbrev_die_table
[abbrev_id
];
4430 if (abbrev
->die_tag
== die
->die_tag
)
4432 if ((abbrev
->die_child
!= NULL
) == (die
->die_child
!= NULL
))
4434 a_attr
= abbrev
->die_attr
;
4435 d_attr
= die
->die_attr
;
4437 while (a_attr
!= NULL
&& d_attr
!= NULL
)
4439 if ((a_attr
->dw_attr
!= d_attr
->dw_attr
)
4440 || (value_format (&a_attr
->dw_attr_val
)
4441 != value_format (&d_attr
->dw_attr_val
)))
4444 a_attr
= a_attr
->dw_attr_next
;
4445 d_attr
= d_attr
->dw_attr_next
;
4448 if (a_attr
== NULL
&& d_attr
== NULL
)
4454 if (abbrev_id
>= abbrev_die_table_in_use
)
4456 if (abbrev_die_table_in_use
>= abbrev_die_table_allocated
)
4458 n_alloc
= abbrev_die_table_allocated
+ ABBREV_DIE_TABLE_INCREMENT
;
4460 = (dw_die_ref
*) xrealloc (abbrev_die_table
,
4461 sizeof (dw_die_ref
) * n_alloc
);
4463 bzero ((char *) &abbrev_die_table
[abbrev_die_table_allocated
],
4464 (n_alloc
- abbrev_die_table_allocated
) * sizeof (dw_die_ref
));
4465 abbrev_die_table_allocated
= n_alloc
;
4468 ++abbrev_die_table_in_use
;
4469 abbrev_die_table
[abbrev_id
] = die
;
4472 die
->die_abbrev
= abbrev_id
;
4473 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4474 build_abbrev_table (c
);
4477 /* Return the size of a string, including the null byte.
4479 This used to treat backslashes as escapes, and hence they were not included
4480 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
4481 which treats a backslash as a backslash, escaping it if necessary, and hence
4482 we must include them in the count. */
4484 static unsigned long
4485 size_of_string (str
)
4488 return strlen (str
) + 1;
4491 /* Return the size of a location descriptor. */
4493 static unsigned long
4494 size_of_loc_descr (loc
)
4495 register dw_loc_descr_ref loc
;
4497 register unsigned long size
= 1;
4499 switch (loc
->dw_loc_opc
)
4521 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4524 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4529 case DW_OP_plus_uconst
:
4530 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4568 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4571 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4574 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4577 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4578 size
+= size_of_sleb128 (loc
->dw_loc_oprnd2
.v
.val_int
);
4581 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4583 case DW_OP_deref_size
:
4584 case DW_OP_xderef_size
:
4594 /* Return the size of a series of location descriptors. */
4596 static unsigned long
4598 register dw_loc_descr_ref loc
;
4600 register unsigned long size
= 0;
4602 for (; loc
!= NULL
; loc
= loc
->dw_loc_next
)
4603 size
+= size_of_loc_descr (loc
);
4608 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4611 constant_size (value
)
4612 long unsigned value
;
4619 log
= floor_log2 (value
);
4622 log
= 1 << (floor_log2 (log
) + 1);
4627 /* Return the size of a DIE, as it is represented in the
4628 .debug_info section. */
4630 static unsigned long
4632 register dw_die_ref die
;
4634 register unsigned long size
= 0;
4635 register dw_attr_ref a
;
4637 size
+= size_of_uleb128 (die
->die_abbrev
);
4638 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
4640 switch (a
->dw_attr_val
.val_class
)
4642 case dw_val_class_addr
:
4645 case dw_val_class_loc
:
4647 register unsigned long lsize
4648 = size_of_locs (a
->dw_attr_val
.v
.val_loc
);
4651 size
+= constant_size (lsize
);
4655 case dw_val_class_const
:
4658 case dw_val_class_unsigned_const
:
4659 size
+= constant_size (a
->dw_attr_val
.v
.val_unsigned
);
4661 case dw_val_class_long_long
:
4662 size
+= 1 + 8; /* block */
4664 case dw_val_class_float
:
4665 size
+= 1 + a
->dw_attr_val
.v
.val_float
.length
* 4; /* block */
4667 case dw_val_class_flag
:
4670 case dw_val_class_die_ref
:
4671 size
+= DWARF_OFFSET_SIZE
;
4673 case dw_val_class_fde_ref
:
4674 size
+= DWARF_OFFSET_SIZE
;
4676 case dw_val_class_lbl_id
:
4679 case dw_val_class_section_offset
:
4680 size
+= DWARF_OFFSET_SIZE
;
4682 case dw_val_class_str
:
4683 size
+= size_of_string (a
->dw_attr_val
.v
.val_str
);
4693 /* Size the debugging information associated with a given DIE.
4694 Visits the DIE's children recursively. Updates the global
4695 variable next_die_offset, on each time through. Uses the
4696 current value of next_die_offset to update the die_offset
4697 field in each DIE. */
4700 calc_die_sizes (die
)
4703 register dw_die_ref c
;
4704 die
->die_offset
= next_die_offset
;
4705 next_die_offset
+= size_of_die (die
);
4707 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4710 if (die
->die_child
!= NULL
)
4711 /* Count the null byte used to terminate sibling lists. */
4712 next_die_offset
+= 1;
4715 /* Return the size of the line information prolog generated for the
4716 compilation unit. */
4718 static unsigned long
4719 size_of_line_prolog ()
4721 register unsigned long size
;
4722 register unsigned long ft_index
;
4724 size
= DWARF_LINE_PROLOG_HEADER_SIZE
;
4726 /* Count the size of the table giving number of args for each
4728 size
+= DWARF_LINE_OPCODE_BASE
- 1;
4730 /* Include directory table is empty (at present). Count only the
4731 null byte used to terminate the table. */
4734 for (ft_index
= 1; ft_index
< file_table_in_use
; ++ft_index
)
4736 /* File name entry. */
4737 size
+= size_of_string (file_table
[ft_index
]);
4739 /* Include directory index. */
4740 size
+= size_of_uleb128 (0);
4742 /* Modification time. */
4743 size
+= size_of_uleb128 (0);
4745 /* File length in bytes. */
4746 size
+= size_of_uleb128 (0);
4749 /* Count the file table terminator. */
4754 /* Return the size of the line information generated for this
4755 compilation unit. */
4757 static unsigned long
4758 size_of_line_info ()
4760 register unsigned long size
;
4761 register unsigned long lt_index
;
4762 register unsigned long current_line
;
4763 register long line_offset
;
4764 register long line_delta
;
4765 register unsigned long current_file
;
4766 register unsigned long function
;
4767 unsigned long size_of_set_address
;
4769 /* Size of a DW_LNE_set_address instruction. */
4770 size_of_set_address
= 1 + size_of_uleb128 (1 + PTR_SIZE
) + 1 + PTR_SIZE
;
4772 /* Version number. */
4775 /* Prolog length specifier. */
4776 size
+= DWARF_OFFSET_SIZE
;
4779 size
+= size_of_line_prolog ();
4781 /* Set address register instruction. */
4782 size
+= size_of_set_address
;
4786 for (lt_index
= 1; lt_index
< line_info_table_in_use
; ++lt_index
)
4788 register dw_line_info_ref line_info
;
4790 /* Advance pc instruction. */
4791 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4795 size
+= size_of_set_address
;
4797 line_info
= &line_info_table
[lt_index
];
4798 if (line_info
->dw_file_num
!= current_file
)
4800 /* Set file number instruction. */
4802 current_file
= line_info
->dw_file_num
;
4803 size
+= size_of_uleb128 (current_file
);
4806 if (line_info
->dw_line_num
!= current_line
)
4808 line_offset
= line_info
->dw_line_num
- current_line
;
4809 line_delta
= line_offset
- DWARF_LINE_BASE
;
4810 current_line
= line_info
->dw_line_num
;
4811 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
4812 /* 1-byte special line number instruction. */
4816 /* Advance line instruction. */
4818 size
+= size_of_sleb128 (line_offset
);
4819 /* Generate line entry instruction. */
4825 /* Advance pc instruction. */
4829 size
+= size_of_set_address
;
4831 /* End of line number info. marker. */
4832 size
+= 1 + size_of_uleb128 (1) + 1;
4837 for (lt_index
= 0; lt_index
< separate_line_info_table_in_use
; )
4839 register dw_separate_line_info_ref line_info
4840 = &separate_line_info_table
[lt_index
];
4841 if (function
!= line_info
->function
)
4843 function
= line_info
->function
;
4844 /* Set address register instruction. */
4845 size
+= size_of_set_address
;
4849 /* Advance pc instruction. */
4853 size
+= size_of_set_address
;
4856 if (line_info
->dw_file_num
!= current_file
)
4858 /* Set file number instruction. */
4860 current_file
= line_info
->dw_file_num
;
4861 size
+= size_of_uleb128 (current_file
);
4864 if (line_info
->dw_line_num
!= current_line
)
4866 line_offset
= line_info
->dw_line_num
- current_line
;
4867 line_delta
= line_offset
- DWARF_LINE_BASE
;
4868 current_line
= line_info
->dw_line_num
;
4869 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
4870 /* 1-byte special line number instruction. */
4874 /* Advance line instruction. */
4876 size
+= size_of_sleb128 (line_offset
);
4878 /* Generate line entry instruction. */
4885 /* If we're done with a function, end its sequence. */
4886 if (lt_index
== separate_line_info_table_in_use
4887 || separate_line_info_table
[lt_index
].function
!= function
)
4892 /* Advance pc instruction. */
4896 size
+= size_of_set_address
;
4898 /* End of line number info. marker. */
4899 size
+= 1 + size_of_uleb128 (1) + 1;
4906 /* Return the size of the .debug_pubnames table generated for the
4907 compilation unit. */
4909 static unsigned long
4912 register unsigned long size
;
4913 register unsigned i
;
4915 size
= DWARF_PUBNAMES_HEADER_SIZE
;
4916 for (i
= 0; i
< pubname_table_in_use
; ++i
)
4918 register pubname_ref p
= &pubname_table
[i
];
4919 size
+= DWARF_OFFSET_SIZE
+ size_of_string (p
->name
);
4922 size
+= DWARF_OFFSET_SIZE
;
4926 /* Return the size of the information in the .debug_aranges section. */
4928 static unsigned long
4931 register unsigned long size
;
4933 size
= DWARF_ARANGES_HEADER_SIZE
;
4935 /* Count the address/length pair for this compilation unit. */
4936 size
+= 2 * PTR_SIZE
;
4937 size
+= 2 * PTR_SIZE
* arange_table_in_use
;
4939 /* Count the two zero words used to terminated the address range table. */
4940 size
+= 2 * PTR_SIZE
;
4944 /* Select the encoding of an attribute value. */
4946 static enum dwarf_form
4950 switch (v
->val_class
)
4952 case dw_val_class_addr
:
4953 return DW_FORM_addr
;
4954 case dw_val_class_loc
:
4955 switch (constant_size (size_of_locs (v
->v
.val_loc
)))
4958 return DW_FORM_block1
;
4960 return DW_FORM_block2
;
4964 case dw_val_class_const
:
4965 return DW_FORM_data4
;
4966 case dw_val_class_unsigned_const
:
4967 switch (constant_size (v
->v
.val_unsigned
))
4970 return DW_FORM_data1
;
4972 return DW_FORM_data2
;
4974 return DW_FORM_data4
;
4976 return DW_FORM_data8
;
4980 case dw_val_class_long_long
:
4981 return DW_FORM_block1
;
4982 case dw_val_class_float
:
4983 return DW_FORM_block1
;
4984 case dw_val_class_flag
:
4985 return DW_FORM_flag
;
4986 case dw_val_class_die_ref
:
4988 case dw_val_class_fde_ref
:
4989 return DW_FORM_data
;
4990 case dw_val_class_lbl_id
:
4991 return DW_FORM_addr
;
4992 case dw_val_class_section_offset
:
4993 return DW_FORM_data
;
4994 case dw_val_class_str
:
4995 return DW_FORM_string
;
5001 /* Output the encoding of an attribute value. */
5004 output_value_format (v
)
5007 enum dwarf_form form
= value_format (v
);
5009 output_uleb128 (form
);
5011 fprintf (asm_out_file
, " (%s)", dwarf_form_name (form
));
5013 fputc ('\n', asm_out_file
);
5016 /* Output the .debug_abbrev section which defines the DIE abbreviation
5020 output_abbrev_section ()
5022 unsigned long abbrev_id
;
5025 for (abbrev_id
= 1; abbrev_id
< abbrev_die_table_in_use
; ++abbrev_id
)
5027 register dw_die_ref abbrev
= abbrev_die_table
[abbrev_id
];
5029 output_uleb128 (abbrev_id
);
5031 fprintf (asm_out_file
, " (abbrev code)");
5033 fputc ('\n', asm_out_file
);
5034 output_uleb128 (abbrev
->die_tag
);
5036 fprintf (asm_out_file
, " (TAG: %s)",
5037 dwarf_tag_name (abbrev
->die_tag
));
5039 fputc ('\n', asm_out_file
);
5040 fprintf (asm_out_file
, "\t%s\t0x%x", ASM_BYTE_OP
,
5041 abbrev
->die_child
!= NULL
? DW_children_yes
: DW_children_no
);
5044 fprintf (asm_out_file
, "\t%s %s",
5046 (abbrev
->die_child
!= NULL
5047 ? "DW_children_yes" : "DW_children_no"));
5049 fputc ('\n', asm_out_file
);
5051 for (a_attr
= abbrev
->die_attr
; a_attr
!= NULL
;
5052 a_attr
= a_attr
->dw_attr_next
)
5054 output_uleb128 (a_attr
->dw_attr
);
5056 fprintf (asm_out_file
, " (%s)",
5057 dwarf_attr_name (a_attr
->dw_attr
));
5059 fputc ('\n', asm_out_file
);
5060 output_value_format (&a_attr
->dw_attr_val
);
5063 fprintf (asm_out_file
, "\t%s\t0,0\n", ASM_BYTE_OP
);
5067 /* Output location description stack opcode's operands (if any). */
5070 output_loc_operands (loc
)
5071 register dw_loc_descr_ref loc
;
5073 register dw_val_ref val1
= &loc
->dw_loc_oprnd1
;
5074 register dw_val_ref val2
= &loc
->dw_loc_oprnd2
;
5076 switch (loc
->dw_loc_opc
)
5079 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file
, val1
->v
.val_addr
);
5080 fputc ('\n', asm_out_file
);
5084 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_flag
);
5085 fputc ('\n', asm_out_file
);
5089 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, val1
->v
.val_int
);
5090 fputc ('\n', asm_out_file
);
5094 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, val1
->v
.val_int
);
5095 fputc ('\n', asm_out_file
);
5100 fputc ('\n', asm_out_file
);
5103 output_uleb128 (val1
->v
.val_unsigned
);
5104 fputc ('\n', asm_out_file
);
5107 output_sleb128 (val1
->v
.val_int
);
5108 fputc ('\n', asm_out_file
);
5111 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_int
);
5112 fputc ('\n', asm_out_file
);
5114 case DW_OP_plus_uconst
:
5115 output_uleb128 (val1
->v
.val_unsigned
);
5116 fputc ('\n', asm_out_file
);
5120 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, val1
->v
.val_int
);
5121 fputc ('\n', asm_out_file
);
5155 output_sleb128 (val1
->v
.val_int
);
5156 fputc ('\n', asm_out_file
);
5159 output_uleb128 (val1
->v
.val_unsigned
);
5160 fputc ('\n', asm_out_file
);
5163 output_sleb128 (val1
->v
.val_int
);
5164 fputc ('\n', asm_out_file
);
5167 output_uleb128 (val1
->v
.val_unsigned
);
5168 fputc ('\n', asm_out_file
);
5169 output_sleb128 (val2
->v
.val_int
);
5170 fputc ('\n', asm_out_file
);
5173 output_uleb128 (val1
->v
.val_unsigned
);
5174 fputc ('\n', asm_out_file
);
5176 case DW_OP_deref_size
:
5177 case DW_OP_xderef_size
:
5178 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_flag
);
5179 fputc ('\n', asm_out_file
);
5186 /* Compute the offset of a sibling. */
5188 static unsigned long
5189 sibling_offset (die
)
5192 unsigned long offset
;
5194 if (die
->die_child_last
== NULL
)
5195 offset
= die
->die_offset
+ size_of_die (die
);
5197 offset
= sibling_offset (die
->die_child_last
) + 1;
5202 /* Output the DIE and its attributes. Called recursively to generate
5203 the definitions of each child DIE. */
5207 register dw_die_ref die
;
5209 register dw_attr_ref a
;
5210 register dw_die_ref c
;
5211 register unsigned long ref_offset
;
5212 register unsigned long size
;
5213 register dw_loc_descr_ref loc
;
5215 output_uleb128 (die
->die_abbrev
);
5217 fprintf (asm_out_file
, " (DIE (0x%lx) %s)",
5218 die
->die_offset
, dwarf_tag_name (die
->die_tag
));
5220 fputc ('\n', asm_out_file
);
5222 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
5224 switch (a
->dw_attr_val
.val_class
)
5226 case dw_val_class_addr
:
5227 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file
,
5228 a
->dw_attr_val
.v
.val_addr
);
5231 case dw_val_class_loc
:
5232 size
= size_of_locs (a
->dw_attr_val
.v
.val_loc
);
5234 /* Output the block length for this list of location operations. */
5235 switch (constant_size (size
))
5238 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, size
);
5241 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, size
);
5248 fprintf (asm_out_file
, "\t%s %s",
5249 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5251 fputc ('\n', asm_out_file
);
5252 for (loc
= a
->dw_attr_val
.v
.val_loc
; loc
!= NULL
;
5253 loc
= loc
->dw_loc_next
)
5255 /* Output the opcode. */
5256 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, loc
->dw_loc_opc
);
5258 fprintf (asm_out_file
, "\t%s %s", ASM_COMMENT_START
,
5259 dwarf_stack_op_name (loc
->dw_loc_opc
));
5261 fputc ('\n', asm_out_file
);
5263 /* Output the operand(s) (if any). */
5264 output_loc_operands (loc
);
5268 case dw_val_class_const
:
5269 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, a
->dw_attr_val
.v
.val_int
);
5272 case dw_val_class_unsigned_const
:
5273 switch (constant_size (a
->dw_attr_val
.v
.val_unsigned
))
5276 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5277 a
->dw_attr_val
.v
.val_unsigned
);
5280 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
,
5281 a
->dw_attr_val
.v
.val_unsigned
);
5284 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
,
5285 a
->dw_attr_val
.v
.val_unsigned
);
5288 ASM_OUTPUT_DWARF_DATA8 (asm_out_file
,
5289 a
->dw_attr_val
.v
.val_long_long
.hi
,
5290 a
->dw_attr_val
.v
.val_long_long
.low
);
5297 case dw_val_class_long_long
:
5298 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 8);
5300 fprintf (asm_out_file
, "\t%s %s",
5301 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5303 fputc ('\n', asm_out_file
);
5304 ASM_OUTPUT_DWARF_DATA8 (asm_out_file
,
5305 a
->dw_attr_val
.v
.val_long_long
.hi
,
5306 a
->dw_attr_val
.v
.val_long_long
.low
);
5309 fprintf (asm_out_file
,
5310 "\t%s long long constant", ASM_COMMENT_START
);
5312 fputc ('\n', asm_out_file
);
5315 case dw_val_class_float
:
5317 register unsigned int i
;
5318 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5319 a
->dw_attr_val
.v
.val_float
.length
* 4);
5321 fprintf (asm_out_file
, "\t%s %s",
5322 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5324 fputc ('\n', asm_out_file
);
5325 for (i
= 0; i
< a
->dw_attr_val
.v
.val_float
.length
; ++i
)
5327 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
,
5328 a
->dw_attr_val
.v
.val_float
.array
[i
]);
5330 fprintf (asm_out_file
, "\t%s fp constant word %u",
5331 ASM_COMMENT_START
, i
);
5333 fputc ('\n', asm_out_file
);
5338 case dw_val_class_flag
:
5339 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, a
->dw_attr_val
.v
.val_flag
);
5342 case dw_val_class_die_ref
:
5343 if (a
->dw_attr_val
.v
.val_die_ref
!= NULL
)
5344 ref_offset
= a
->dw_attr_val
.v
.val_die_ref
->die_offset
;
5345 else if (a
->dw_attr
== DW_AT_sibling
)
5346 ref_offset
= sibling_offset(die
);
5350 ASM_OUTPUT_DWARF_DATA (asm_out_file
, ref_offset
);
5353 case dw_val_class_fde_ref
:
5356 ASM_GENERATE_INTERNAL_LABEL
5357 (l1
, FDE_AFTER_SIZE_LABEL
, a
->dw_attr_val
.v
.val_fde_index
* 2);
5358 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, l1
);
5359 fprintf (asm_out_file
, " - %d", DWARF_OFFSET_SIZE
);
5363 case dw_val_class_lbl_id
:
5364 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, a
->dw_attr_val
.v
.val_lbl_id
);
5367 case dw_val_class_section_offset
:
5368 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
,
5370 (a
->dw_attr_val
.v
.val_section
));
5373 case dw_val_class_str
:
5375 ASM_OUTPUT_DWARF_STRING (asm_out_file
, a
->dw_attr_val
.v
.val_str
);
5377 ASM_OUTPUT_ASCII (asm_out_file
,
5378 a
->dw_attr_val
.v
.val_str
,
5379 (int) strlen (a
->dw_attr_val
.v
.val_str
) + 1);
5386 if (a
->dw_attr_val
.val_class
!= dw_val_class_loc
5387 && a
->dw_attr_val
.val_class
!= dw_val_class_long_long
5388 && a
->dw_attr_val
.val_class
!= dw_val_class_float
)
5391 fprintf (asm_out_file
, "\t%s %s",
5392 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5394 fputc ('\n', asm_out_file
);
5398 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
5401 if (die
->die_child
!= NULL
)
5403 /* Add null byte to terminate sibling list. */
5404 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5406 fprintf (asm_out_file
, "\t%s end of children of DIE 0x%lx",
5407 ASM_COMMENT_START
, die
->die_offset
);
5409 fputc ('\n', asm_out_file
);
5413 /* Output the compilation unit that appears at the beginning of the
5414 .debug_info section, and precedes the DIE descriptions. */
5417 output_compilation_unit_header ()
5419 ASM_OUTPUT_DWARF_DATA (asm_out_file
, next_die_offset
- DWARF_OFFSET_SIZE
);
5421 fprintf (asm_out_file
, "\t%s Length of Compilation Unit Info.",
5424 fputc ('\n', asm_out_file
);
5425 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5427 fprintf (asm_out_file
, "\t%s DWARF version number", ASM_COMMENT_START
);
5429 fputc ('\n', asm_out_file
);
5430 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (ABBREV_SECTION
));
5432 fprintf (asm_out_file
, "\t%s Offset Into Abbrev. Section",
5435 fputc ('\n', asm_out_file
);
5436 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, PTR_SIZE
);
5438 fprintf (asm_out_file
, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START
);
5440 fputc ('\n', asm_out_file
);
5443 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5444 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5445 argument list, and maybe the scope. */
5448 dwarf2_name (decl
, scope
)
5452 return (*decl_printable_name
) (decl
, scope
? 1 : 0);
5455 /* Add a new entry to .debug_pubnames if appropriate. */
5458 add_pubname (decl
, die
)
5464 if (! TREE_PUBLIC (decl
))
5467 if (pubname_table_in_use
== pubname_table_allocated
)
5469 pubname_table_allocated
+= PUBNAME_TABLE_INCREMENT
;
5470 pubname_table
= (pubname_ref
) xrealloc
5471 (pubname_table
, pubname_table_allocated
* sizeof (pubname_entry
));
5474 p
= &pubname_table
[pubname_table_in_use
++];
5477 p
->name
= xstrdup (dwarf2_name (decl
, 1));
5480 /* Output the public names table used to speed up access to externally
5481 visible names. For now, only generate entries for externally
5482 visible procedures. */
5487 register unsigned i
;
5488 register unsigned long pubnames_length
= size_of_pubnames ();
5490 ASM_OUTPUT_DWARF_DATA (asm_out_file
, pubnames_length
);
5493 fprintf (asm_out_file
, "\t%s Length of Public Names Info.",
5496 fputc ('\n', asm_out_file
);
5497 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5500 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5502 fputc ('\n', asm_out_file
);
5503 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (DEBUG_INFO_SECTION
));
5505 fprintf (asm_out_file
, "\t%s Offset of Compilation Unit Info.",
5508 fputc ('\n', asm_out_file
);
5509 ASM_OUTPUT_DWARF_DATA (asm_out_file
, next_die_offset
);
5511 fprintf (asm_out_file
, "\t%s Compilation Unit Length", ASM_COMMENT_START
);
5513 fputc ('\n', asm_out_file
);
5514 for (i
= 0; i
< pubname_table_in_use
; ++i
)
5516 register pubname_ref pub
= &pubname_table
[i
];
5518 ASM_OUTPUT_DWARF_DATA (asm_out_file
, pub
->die
->die_offset
);
5520 fprintf (asm_out_file
, "\t%s DIE offset", ASM_COMMENT_START
);
5522 fputc ('\n', asm_out_file
);
5526 ASM_OUTPUT_DWARF_STRING (asm_out_file
, pub
->name
);
5527 fprintf (asm_out_file
, "%s external name", ASM_COMMENT_START
);
5531 ASM_OUTPUT_ASCII (asm_out_file
, pub
->name
,
5532 (int) strlen (pub
->name
) + 1);
5535 fputc ('\n', asm_out_file
);
5538 ASM_OUTPUT_DWARF_DATA (asm_out_file
, 0);
5539 fputc ('\n', asm_out_file
);
5542 /* Add a new entry to .debug_aranges if appropriate. */
5545 add_arange (decl
, die
)
5549 if (! DECL_SECTION_NAME (decl
))
5552 if (arange_table_in_use
== arange_table_allocated
)
5554 arange_table_allocated
+= ARANGE_TABLE_INCREMENT
;
5556 = (arange_ref
) xrealloc (arange_table
,
5557 arange_table_allocated
* sizeof (dw_die_ref
));
5560 arange_table
[arange_table_in_use
++] = die
;
5563 /* Output the information that goes into the .debug_aranges table.
5564 Namely, define the beginning and ending address range of the
5565 text section generated for this compilation unit. */
5570 register unsigned i
;
5571 register unsigned long aranges_length
= size_of_aranges ();
5573 ASM_OUTPUT_DWARF_DATA (asm_out_file
, aranges_length
);
5575 fprintf (asm_out_file
, "\t%s Length of Address Ranges Info.",
5578 fputc ('\n', asm_out_file
);
5579 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5581 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5583 fputc ('\n', asm_out_file
);
5584 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (DEBUG_INFO_SECTION
));
5586 fprintf (asm_out_file
, "\t%s Offset of Compilation Unit Info.",
5589 fputc ('\n', asm_out_file
);
5590 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, PTR_SIZE
);
5592 fprintf (asm_out_file
, "\t%s Size of Address", ASM_COMMENT_START
);
5594 fputc ('\n', asm_out_file
);
5595 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5597 fprintf (asm_out_file
, "\t%s Size of Segment Descriptor",
5600 fputc ('\n', asm_out_file
);
5601 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 4);
5603 fprintf (asm_out_file
, ",0,0");
5606 fprintf (asm_out_file
, "\t%s Pad to %d byte boundary",
5607 ASM_COMMENT_START
, 2 * PTR_SIZE
);
5609 fputc ('\n', asm_out_file
);
5610 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, stripattributes (TEXT_SECTION
));
5612 fprintf (asm_out_file
, "\t%s Address", ASM_COMMENT_START
);
5614 fputc ('\n', asm_out_file
);
5615 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
, text_end_label
,
5616 stripattributes (TEXT_SECTION
));
5618 fprintf (asm_out_file
, "%s Length", ASM_COMMENT_START
);
5620 fputc ('\n', asm_out_file
);
5621 for (i
= 0; i
< arange_table_in_use
; ++i
)
5623 dw_die_ref a
= arange_table
[i
];
5625 if (a
->die_tag
== DW_TAG_subprogram
)
5626 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, get_AT_low_pc (a
));
5629 char *name
= get_AT_string (a
, DW_AT_MIPS_linkage_name
);
5631 name
= get_AT_string (a
, DW_AT_name
);
5633 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, name
);
5637 fprintf (asm_out_file
, "\t%s Address", ASM_COMMENT_START
);
5639 fputc ('\n', asm_out_file
);
5640 if (a
->die_tag
== DW_TAG_subprogram
)
5641 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
, get_AT_hi_pc (a
),
5644 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
,
5645 get_AT_unsigned (a
, DW_AT_byte_size
));
5648 fprintf (asm_out_file
, "%s Length", ASM_COMMENT_START
);
5650 fputc ('\n', asm_out_file
);
5653 /* Output the terminator words. */
5654 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
, 0);
5655 fputc ('\n', asm_out_file
);
5656 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
, 0);
5657 fputc ('\n', asm_out_file
);
5660 /* Output the source line number correspondence information. This
5661 information goes into the .debug_line section.
5663 If the format of this data changes, then the function size_of_line_info
5664 must also be adjusted the same way. */
5669 char line_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
5670 char prev_line_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
5671 register unsigned opc
;
5672 register unsigned n_op_args
;
5673 register unsigned long ft_index
;
5674 register unsigned long lt_index
;
5675 register unsigned long current_line
;
5676 register long line_offset
;
5677 register long line_delta
;
5678 register unsigned long current_file
;
5679 register unsigned long function
;
5681 ASM_OUTPUT_DWARF_DATA (asm_out_file
, size_of_line_info ());
5683 fprintf (asm_out_file
, "\t%s Length of Source Line Info.",
5686 fputc ('\n', asm_out_file
);
5687 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5689 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5691 fputc ('\n', asm_out_file
);
5692 ASM_OUTPUT_DWARF_DATA (asm_out_file
, size_of_line_prolog ());
5694 fprintf (asm_out_file
, "\t%s Prolog Length", ASM_COMMENT_START
);
5696 fputc ('\n', asm_out_file
);
5697 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_LINE_MIN_INSTR_LENGTH
);
5699 fprintf (asm_out_file
, "\t%s Minimum Instruction Length",
5702 fputc ('\n', asm_out_file
);
5703 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_LINE_DEFAULT_IS_STMT_START
);
5705 fprintf (asm_out_file
, "\t%s Default is_stmt_start flag",
5708 fputc ('\n', asm_out_file
);
5709 fprintf (asm_out_file
, "\t%s\t%d", ASM_BYTE_OP
, DWARF_LINE_BASE
);
5711 fprintf (asm_out_file
, "\t%s Line Base Value (Special Opcodes)",
5714 fputc ('\n', asm_out_file
);
5715 fprintf (asm_out_file
, "\t%s\t%u", ASM_BYTE_OP
, DWARF_LINE_RANGE
);
5717 fprintf (asm_out_file
, "\t%s Line Range Value (Special Opcodes)",
5720 fputc ('\n', asm_out_file
);
5721 fprintf (asm_out_file
, "\t%s\t%u", ASM_BYTE_OP
, DWARF_LINE_OPCODE_BASE
);
5723 fprintf (asm_out_file
, "\t%s Special Opcode Base", ASM_COMMENT_START
);
5725 fputc ('\n', asm_out_file
);
5726 for (opc
= 1; opc
< DWARF_LINE_OPCODE_BASE
; ++opc
)
5730 case DW_LNS_advance_pc
:
5731 case DW_LNS_advance_line
:
5732 case DW_LNS_set_file
:
5733 case DW_LNS_set_column
:
5734 case DW_LNS_fixed_advance_pc
:
5741 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, n_op_args
);
5743 fprintf (asm_out_file
, "\t%s opcode: 0x%x has %d args",
5744 ASM_COMMENT_START
, opc
, n_op_args
);
5745 fputc ('\n', asm_out_file
);
5749 fprintf (asm_out_file
, "%s Include Directory Table\n", ASM_COMMENT_START
);
5751 /* Include directory table is empty, at present */
5752 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5753 fputc ('\n', asm_out_file
);
5755 fprintf (asm_out_file
, "%s File Name Table\n", ASM_COMMENT_START
);
5757 for (ft_index
= 1; ft_index
< file_table_in_use
; ++ft_index
)
5761 ASM_OUTPUT_DWARF_STRING (asm_out_file
, file_table
[ft_index
]);
5762 fprintf (asm_out_file
, "%s File Entry: 0x%lx",
5763 ASM_COMMENT_START
, ft_index
);
5767 ASM_OUTPUT_ASCII (asm_out_file
,
5768 file_table
[ft_index
],
5769 (int) strlen (file_table
[ft_index
]) + 1);
5772 fputc ('\n', asm_out_file
);
5774 /* Include directory index */
5776 fputc ('\n', asm_out_file
);
5778 /* Modification time */
5780 fputc ('\n', asm_out_file
);
5782 /* File length in bytes */
5784 fputc ('\n', asm_out_file
);
5787 /* Terminate the file name table */
5788 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5789 fputc ('\n', asm_out_file
);
5791 /* Set the address register to the first location in the text section */
5792 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5794 fprintf (asm_out_file
, "\t%s DW_LNE_set_address", ASM_COMMENT_START
);
5796 fputc ('\n', asm_out_file
);
5797 output_uleb128 (1 + PTR_SIZE
);
5798 fputc ('\n', asm_out_file
);
5799 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5800 fputc ('\n', asm_out_file
);
5801 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, stripattributes (TEXT_SECTION
));
5802 fputc ('\n', asm_out_file
);
5804 /* Generate the line number to PC correspondence table, encoded as
5805 a series of state machine operations. */
5808 strcpy (prev_line_label
, stripattributes (TEXT_SECTION
));
5809 for (lt_index
= 1; lt_index
< line_info_table_in_use
; ++lt_index
)
5811 register dw_line_info_ref line_info
;
5813 /* Emit debug info for the address of the current line, choosing
5814 the encoding that uses the least amount of space. */
5815 /* ??? Unfortunately, we have little choice here currently, and must
5816 always use the most general form. Gcc does not know the address
5817 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5818 dwarf2 aware assemblers at this time, so we can't use any special
5819 pseudo ops that would allow the assembler to optimally encode this for
5820 us. Many ports do have length attributes which will give an upper
5821 bound on the address range. We could perhaps use length attributes
5822 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5823 ASM_GENERATE_INTERNAL_LABEL (line_label
, LINE_CODE_LABEL
, lt_index
);
5826 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5827 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5829 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5832 fputc ('\n', asm_out_file
);
5833 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
, prev_line_label
);
5834 fputc ('\n', asm_out_file
);
5838 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5839 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5841 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5843 fputc ('\n', asm_out_file
);
5844 output_uleb128 (1 + PTR_SIZE
);
5845 fputc ('\n', asm_out_file
);
5846 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5847 fputc ('\n', asm_out_file
);
5848 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5849 fputc ('\n', asm_out_file
);
5851 strcpy (prev_line_label
, line_label
);
5853 /* Emit debug info for the source file of the current line, if
5854 different from the previous line. */
5855 line_info
= &line_info_table
[lt_index
];
5856 if (line_info
->dw_file_num
!= current_file
)
5858 current_file
= line_info
->dw_file_num
;
5859 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_set_file
);
5861 fprintf (asm_out_file
, "\t%s DW_LNS_set_file", ASM_COMMENT_START
);
5863 fputc ('\n', asm_out_file
);
5864 output_uleb128 (current_file
);
5866 fprintf (asm_out_file
, " (\"%s\")", file_table
[current_file
]);
5868 fputc ('\n', asm_out_file
);
5871 /* Emit debug info for the current line number, choosing the encoding
5872 that uses the least amount of space. */
5873 line_offset
= line_info
->dw_line_num
- current_line
;
5874 line_delta
= line_offset
- DWARF_LINE_BASE
;
5875 current_line
= line_info
->dw_line_num
;
5876 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
5878 /* This can handle deltas from -10 to 234, using the current
5879 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5881 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5882 DWARF_LINE_OPCODE_BASE
+ line_delta
);
5884 fprintf (asm_out_file
,
5885 "\t%s line %ld", ASM_COMMENT_START
, current_line
);
5887 fputc ('\n', asm_out_file
);
5891 /* This can handle any delta. This takes at least 4 bytes, depending
5892 on the value being encoded. */
5893 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_advance_line
);
5895 fprintf (asm_out_file
, "\t%s advance to line %ld",
5896 ASM_COMMENT_START
, current_line
);
5898 fputc ('\n', asm_out_file
);
5899 output_sleb128 (line_offset
);
5900 fputc ('\n', asm_out_file
);
5901 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_copy
);
5902 fputc ('\n', asm_out_file
);
5906 /* Emit debug info for the address of the end of the function. */
5909 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5911 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5914 fputc ('\n', asm_out_file
);
5915 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, text_end_label
, prev_line_label
);
5916 fputc ('\n', asm_out_file
);
5920 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5922 fprintf (asm_out_file
, "\t%s DW_LNE_set_address", ASM_COMMENT_START
);
5923 fputc ('\n', asm_out_file
);
5924 output_uleb128 (1 + PTR_SIZE
);
5925 fputc ('\n', asm_out_file
);
5926 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5927 fputc ('\n', asm_out_file
);
5928 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, text_end_label
);
5929 fputc ('\n', asm_out_file
);
5932 /* Output the marker for the end of the line number info. */
5933 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5935 fprintf (asm_out_file
, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START
);
5937 fputc ('\n', asm_out_file
);
5939 fputc ('\n', asm_out_file
);
5940 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_end_sequence
);
5941 fputc ('\n', asm_out_file
);
5946 for (lt_index
= 0; lt_index
< separate_line_info_table_in_use
; )
5948 register dw_separate_line_info_ref line_info
5949 = &separate_line_info_table
[lt_index
];
5951 /* Emit debug info for the address of the current line. If this is
5952 a new function, or the first line of a function, then we need
5953 to handle it differently. */
5954 ASM_GENERATE_INTERNAL_LABEL (line_label
, SEPARATE_LINE_CODE_LABEL
,
5956 if (function
!= line_info
->function
)
5958 function
= line_info
->function
;
5960 /* Set the address register to the first line in the function */
5961 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5963 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5966 fputc ('\n', asm_out_file
);
5967 output_uleb128 (1 + PTR_SIZE
);
5968 fputc ('\n', asm_out_file
);
5969 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5970 fputc ('\n', asm_out_file
);
5971 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5972 fputc ('\n', asm_out_file
);
5976 /* ??? See the DW_LNS_advance_pc comment above. */
5979 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5981 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5984 fputc ('\n', asm_out_file
);
5985 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
,
5987 fputc ('\n', asm_out_file
);
5991 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5993 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5995 fputc ('\n', asm_out_file
);
5996 output_uleb128 (1 + PTR_SIZE
);
5997 fputc ('\n', asm_out_file
);
5998 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5999 fputc ('\n', asm_out_file
);
6000 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
6001 fputc ('\n', asm_out_file
);
6004 strcpy (prev_line_label
, line_label
);
6006 /* Emit debug info for the source file of the current line, if
6007 different from the previous line. */
6008 if (line_info
->dw_file_num
!= current_file
)
6010 current_file
= line_info
->dw_file_num
;
6011 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_set_file
);
6013 fprintf (asm_out_file
, "\t%s DW_LNS_set_file", ASM_COMMENT_START
);
6015 fputc ('\n', asm_out_file
);
6016 output_uleb128 (current_file
);
6018 fprintf (asm_out_file
, " (\"%s\")", file_table
[current_file
]);
6020 fputc ('\n', asm_out_file
);
6023 /* Emit debug info for the current line number, choosing the encoding
6024 that uses the least amount of space. */
6025 if (line_info
->dw_line_num
!= current_line
)
6027 line_offset
= line_info
->dw_line_num
- current_line
;
6028 line_delta
= line_offset
- DWARF_LINE_BASE
;
6029 current_line
= line_info
->dw_line_num
;
6030 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
6032 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
6033 DWARF_LINE_OPCODE_BASE
+ line_delta
);
6035 fprintf (asm_out_file
,
6036 "\t%s line %ld", ASM_COMMENT_START
, current_line
);
6038 fputc ('\n', asm_out_file
);
6042 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_advance_line
);
6044 fprintf (asm_out_file
, "\t%s advance to line %ld",
6045 ASM_COMMENT_START
, current_line
);
6047 fputc ('\n', asm_out_file
);
6048 output_sleb128 (line_offset
);
6049 fputc ('\n', asm_out_file
);
6050 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_copy
);
6051 fputc ('\n', asm_out_file
);
6057 /* If we're done with a function, end its sequence. */
6058 if (lt_index
== separate_line_info_table_in_use
6059 || separate_line_info_table
[lt_index
].function
!= function
)
6064 /* Emit debug info for the address of the end of the function. */
6065 ASM_GENERATE_INTERNAL_LABEL (line_label
, FUNC_END_LABEL
, function
);
6068 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
6070 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
6073 fputc ('\n', asm_out_file
);
6074 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
,
6076 fputc ('\n', asm_out_file
);
6080 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
6082 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
6084 fputc ('\n', asm_out_file
);
6085 output_uleb128 (1 + PTR_SIZE
);
6086 fputc ('\n', asm_out_file
);
6087 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
6088 fputc ('\n', asm_out_file
);
6089 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
6090 fputc ('\n', asm_out_file
);
6093 /* Output the marker for the end of this sequence. */
6094 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
6096 fprintf (asm_out_file
, "\t%s DW_LNE_end_sequence",
6099 fputc ('\n', asm_out_file
);
6101 fputc ('\n', asm_out_file
);
6102 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_end_sequence
);
6103 fputc ('\n', asm_out_file
);
6108 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6109 in question represents the outermost pair of curly braces (i.e. the "body
6110 block") of a function or method.
6112 For any BLOCK node representing a "body block" of a function or method, the
6113 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6114 represents the outermost (function) scope for the function or method (i.e.
6115 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6116 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6119 is_body_block (stmt
)
6122 if (TREE_CODE (stmt
) == BLOCK
)
6124 register tree parent
= BLOCK_SUPERCONTEXT (stmt
);
6126 if (TREE_CODE (parent
) == BLOCK
)
6128 register tree grandparent
= BLOCK_SUPERCONTEXT (parent
);
6130 if (TREE_CODE (grandparent
) == FUNCTION_DECL
)
6138 /* Given a pointer to a tree node for some base type, return a pointer to
6139 a DIE that describes the given type.
6141 This routine must only be called for GCC type nodes that correspond to
6142 Dwarf base (fundamental) types. */
6145 base_type_die (type
)
6148 register dw_die_ref base_type_result
;
6149 register char *type_name
;
6150 register enum dwarf_type encoding
;
6151 register tree name
= TYPE_NAME (type
);
6153 if (TREE_CODE (type
) == ERROR_MARK
6154 || TREE_CODE (type
) == VOID_TYPE
)
6157 if (TREE_CODE (name
) == TYPE_DECL
)
6158 name
= DECL_NAME (name
);
6159 type_name
= IDENTIFIER_POINTER (name
);
6161 switch (TREE_CODE (type
))
6164 /* Carefully distinguish the C character types, without messing
6165 up if the language is not C. Note that we check only for the names
6166 that contain spaces; other names might occur by coincidence in other
6168 if (! (TYPE_PRECISION (type
) == CHAR_TYPE_SIZE
6169 && (type
== char_type_node
6170 || ! strcmp (type_name
, "signed char")
6171 || ! strcmp (type_name
, "unsigned char"))))
6173 if (TREE_UNSIGNED (type
))
6174 encoding
= DW_ATE_unsigned
;
6176 encoding
= DW_ATE_signed
;
6179 /* else fall through */
6182 /* GNU Pascal/Ada CHAR type. Not used in C. */
6183 if (TREE_UNSIGNED (type
))
6184 encoding
= DW_ATE_unsigned_char
;
6186 encoding
= DW_ATE_signed_char
;
6190 encoding
= DW_ATE_float
;
6194 encoding
= DW_ATE_complex_float
;
6198 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6199 encoding
= DW_ATE_boolean
;
6203 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6206 base_type_result
= new_die (DW_TAG_base_type
, comp_unit_die
);
6207 add_AT_string (base_type_result
, DW_AT_name
, type_name
);
6208 add_AT_unsigned (base_type_result
, DW_AT_byte_size
,
6209 int_size_in_bytes (type
));
6210 add_AT_unsigned (base_type_result
, DW_AT_encoding
, encoding
);
6212 return base_type_result
;
6215 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6216 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6217 a given type is generally the same as the given type, except that if the
6218 given type is a pointer or reference type, then the root type of the given
6219 type is the root type of the "basis" type for the pointer or reference
6220 type. (This definition of the "root" type is recursive.) Also, the root
6221 type of a `const' qualified type or a `volatile' qualified type is the
6222 root type of the given type without the qualifiers. */
6228 if (TREE_CODE (type
) == ERROR_MARK
)
6229 return error_mark_node
;
6231 switch (TREE_CODE (type
))
6234 return error_mark_node
;
6237 case REFERENCE_TYPE
:
6238 return type_main_variant (root_type (TREE_TYPE (type
)));
6241 return type_main_variant (type
);
6245 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6246 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6252 switch (TREE_CODE (type
))
6267 case QUAL_UNION_TYPE
:
6272 case REFERENCE_TYPE
:
6285 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6286 entry that chains various modifiers in front of the given type. */
6289 modified_type_die (type
, is_const_type
, is_volatile_type
, context_die
)
6291 register int is_const_type
;
6292 register int is_volatile_type
;
6293 register dw_die_ref context_die
;
6295 register enum tree_code code
= TREE_CODE (type
);
6296 register dw_die_ref mod_type_die
= NULL
;
6297 register dw_die_ref sub_die
= NULL
;
6298 register tree item_type
= NULL
;
6300 if (code
!= ERROR_MARK
)
6302 type
= build_type_variant (type
, is_const_type
, is_volatile_type
);
6304 mod_type_die
= lookup_type_die (type
);
6306 return mod_type_die
;
6308 /* Handle C typedef types. */
6309 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
6310 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
6312 tree dtype
= TREE_TYPE (TYPE_NAME (type
));
6315 /* For a named type, use the typedef. */
6316 gen_type_die (type
, context_die
);
6317 mod_type_die
= lookup_type_die (type
);
6320 else if (is_const_type
< TYPE_READONLY (dtype
)
6321 || is_volatile_type
< TYPE_VOLATILE (dtype
))
6322 /* cv-unqualified version of named type. Just use the unnamed
6323 type to which it refers. */
6325 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type
)),
6326 is_const_type
, is_volatile_type
,
6328 /* Else cv-qualified version of named type; fall through. */
6333 else if (is_const_type
)
6335 mod_type_die
= new_die (DW_TAG_const_type
, comp_unit_die
);
6336 sub_die
= modified_type_die (type
, 0, is_volatile_type
, context_die
);
6338 else if (is_volatile_type
)
6340 mod_type_die
= new_die (DW_TAG_volatile_type
, comp_unit_die
);
6341 sub_die
= modified_type_die (type
, 0, 0, context_die
);
6343 else if (code
== POINTER_TYPE
)
6345 mod_type_die
= new_die (DW_TAG_pointer_type
, comp_unit_die
);
6346 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
6348 add_AT_unsigned (mod_type_die
, DW_AT_address_class
, 0);
6350 item_type
= TREE_TYPE (type
);
6352 else if (code
== REFERENCE_TYPE
)
6354 mod_type_die
= new_die (DW_TAG_reference_type
, comp_unit_die
);
6355 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
6357 add_AT_unsigned (mod_type_die
, DW_AT_address_class
, 0);
6359 item_type
= TREE_TYPE (type
);
6361 else if (is_base_type (type
))
6362 mod_type_die
= base_type_die (type
);
6365 gen_type_die (type
, context_die
);
6367 /* We have to get the type_main_variant here (and pass that to the
6368 `lookup_type_die' routine) because the ..._TYPE node we have
6369 might simply be a *copy* of some original type node (where the
6370 copy was created to help us keep track of typedef names) and
6371 that copy might have a different TYPE_UID from the original
6373 mod_type_die
= lookup_type_die (type_main_variant (type
));
6374 if (mod_type_die
== NULL
)
6379 equate_type_number_to_die (type
, mod_type_die
);
6381 /* We must do this after the equate_type_number_to_die call, in case
6382 this is a recursive type. This ensures that the modified_type_die
6383 recursion will terminate even if the type is recursive. Recursive
6384 types are possible in Ada. */
6385 sub_die
= modified_type_die (item_type
,
6386 TYPE_READONLY (item_type
),
6387 TYPE_VOLATILE (item_type
),
6390 if (sub_die
!= NULL
)
6391 add_AT_die_ref (mod_type_die
, DW_AT_type
, sub_die
);
6393 return mod_type_die
;
6396 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6397 an enumerated type. */
6403 return TREE_CODE (type
) == ENUMERAL_TYPE
;
6406 /* Return a location descriptor that designates a machine register. */
6408 static dw_loc_descr_ref
6409 reg_loc_descriptor (rtl
)
6412 register dw_loc_descr_ref loc_result
= NULL
;
6413 register unsigned reg
= reg_number (rtl
);
6416 loc_result
= new_loc_descr (DW_OP_reg0
+ reg
, 0, 0);
6418 loc_result
= new_loc_descr (DW_OP_regx
, reg
, 0);
6423 /* Return a location descriptor that designates a base+offset location. */
6425 static dw_loc_descr_ref
6426 based_loc_descr (reg
, offset
)
6430 register dw_loc_descr_ref loc_result
;
6431 /* For the "frame base", we use the frame pointer or stack pointer
6432 registers, since the RTL for local variables is relative to one of
6434 register unsigned fp_reg
= DBX_REGISTER_NUMBER (frame_pointer_needed
6435 ? HARD_FRAME_POINTER_REGNUM
6436 : STACK_POINTER_REGNUM
);
6439 loc_result
= new_loc_descr (DW_OP_fbreg
, offset
, 0);
6441 loc_result
= new_loc_descr (DW_OP_breg0
+ reg
, offset
, 0);
6443 loc_result
= new_loc_descr (DW_OP_bregx
, reg
, offset
);
6448 /* Return true if this RTL expression describes a base+offset calculation. */
6454 return (GET_CODE (rtl
) == PLUS
6455 && ((GET_CODE (XEXP (rtl
, 0)) == REG
6456 && GET_CODE (XEXP (rtl
, 1)) == CONST_INT
)));
6459 /* The following routine converts the RTL for a variable or parameter
6460 (resident in memory) into an equivalent Dwarf representation of a
6461 mechanism for getting the address of that same variable onto the top of a
6462 hypothetical "address evaluation" stack.
6464 When creating memory location descriptors, we are effectively transforming
6465 the RTL for a memory-resident object into its Dwarf postfix expression
6466 equivalent. This routine recursively descends an RTL tree, turning
6467 it into Dwarf postfix code as it goes. */
6469 static dw_loc_descr_ref
6470 mem_loc_descriptor (rtl
)
6473 dw_loc_descr_ref mem_loc_result
= NULL
;
6474 /* Note that for a dynamically sized array, the location we will generate a
6475 description of here will be the lowest numbered location which is
6476 actually within the array. That's *not* necessarily the same as the
6477 zeroth element of the array. */
6479 switch (GET_CODE (rtl
))
6482 /* The case of a subreg may arise when we have a local (register)
6483 variable or a formal (register) parameter which doesn't quite fill
6484 up an entire register. For now, just assume that it is
6485 legitimate to make the Dwarf info refer to the whole register which
6486 contains the given subreg. */
6487 rtl
= XEXP (rtl
, 0);
6489 /* ... fall through ... */
6492 /* Whenever a register number forms a part of the description of the
6493 method for calculating the (dynamic) address of a memory resident
6494 object, DWARF rules require the register number be referred to as
6495 a "base register". This distinction is not based in any way upon
6496 what category of register the hardware believes the given register
6497 belongs to. This is strictly DWARF terminology we're dealing with
6498 here. Note that in cases where the location of a memory-resident
6499 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6500 OP_CONST (0)) the actual DWARF location descriptor that we generate
6501 may just be OP_BASEREG (basereg). This may look deceptively like
6502 the object in question was allocated to a register (rather than in
6503 memory) so DWARF consumers need to be aware of the subtle
6504 distinction between OP_REG and OP_BASEREG. */
6505 mem_loc_result
= based_loc_descr (reg_number (rtl
), 0);
6509 mem_loc_result
= mem_loc_descriptor (XEXP (rtl
, 0));
6510 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_deref
, 0, 0));
6515 mem_loc_result
= new_loc_descr (DW_OP_addr
, 0, 0);
6516 mem_loc_result
->dw_loc_oprnd1
.val_class
= dw_val_class_addr
;
6517 mem_loc_result
->dw_loc_oprnd1
.v
.val_addr
= addr_to_string (rtl
);
6521 if (is_based_loc (rtl
))
6522 mem_loc_result
= based_loc_descr (reg_number (XEXP (rtl
, 0)),
6523 INTVAL (XEXP (rtl
, 1)));
6526 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 0)));
6527 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 1)));
6528 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_plus
, 0, 0));
6533 /* If a pseudo-reg is optimized away, it is possible for it to
6534 be replaced with a MEM containing a multiply. */
6535 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 0)));
6536 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 1)));
6537 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_mul
, 0, 0));
6541 mem_loc_result
= new_loc_descr (DW_OP_constu
, INTVAL (rtl
), 0);
6548 return mem_loc_result
;
6551 /* Return a descriptor that describes the concatenation of two locations.
6552 This is typically a complex variable. */
6554 static dw_loc_descr_ref
6555 concat_loc_descriptor (x0
, x1
)
6556 register rtx x0
, x1
;
6558 dw_loc_descr_ref cc_loc_result
= NULL
;
6560 if (!is_pseudo_reg (x0
)
6561 && (GET_CODE (x0
) != MEM
|| !is_pseudo_reg (XEXP (x0
, 0))))
6562 add_loc_descr (&cc_loc_result
, loc_descriptor (x0
));
6563 add_loc_descr (&cc_loc_result
,
6564 new_loc_descr (DW_OP_piece
, GET_MODE_SIZE (GET_MODE (x0
)), 0));
6566 if (!is_pseudo_reg (x1
)
6567 && (GET_CODE (x1
) != MEM
|| !is_pseudo_reg (XEXP (x1
, 0))))
6568 add_loc_descr (&cc_loc_result
, loc_descriptor (x1
));
6569 add_loc_descr (&cc_loc_result
,
6570 new_loc_descr (DW_OP_piece
, GET_MODE_SIZE (GET_MODE (x1
)), 0));
6572 return cc_loc_result
;
6575 /* Output a proper Dwarf location descriptor for a variable or parameter
6576 which is either allocated in a register or in a memory location. For a
6577 register, we just generate an OP_REG and the register number. For a
6578 memory location we provide a Dwarf postfix expression describing how to
6579 generate the (dynamic) address of the object onto the address stack. */
6581 static dw_loc_descr_ref
6582 loc_descriptor (rtl
)
6585 dw_loc_descr_ref loc_result
= NULL
;
6586 switch (GET_CODE (rtl
))
6589 /* The case of a subreg may arise when we have a local (register)
6590 variable or a formal (register) parameter which doesn't quite fill
6591 up an entire register. For now, just assume that it is
6592 legitimate to make the Dwarf info refer to the whole register which
6593 contains the given subreg. */
6594 rtl
= XEXP (rtl
, 0);
6596 /* ... fall through ... */
6599 loc_result
= reg_loc_descriptor (rtl
);
6603 loc_result
= mem_loc_descriptor (XEXP (rtl
, 0));
6607 loc_result
= concat_loc_descriptor (XEXP (rtl
, 0), XEXP (rtl
, 1));
6617 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6618 which is not less than the value itself. */
6620 static inline unsigned
6621 ceiling (value
, boundary
)
6622 register unsigned value
;
6623 register unsigned boundary
;
6625 return (((value
+ boundary
- 1) / boundary
) * boundary
);
6628 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6629 pointer to the declared type for the relevant field variable, or return
6630 `integer_type_node' if the given node turns out to be an
6639 if (TREE_CODE (decl
) == ERROR_MARK
)
6640 return integer_type_node
;
6642 type
= DECL_BIT_FIELD_TYPE (decl
);
6643 if (type
== NULL_TREE
)
6644 type
= TREE_TYPE (decl
);
6649 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6650 node, return the alignment in bits for the type, or else return
6651 BITS_PER_WORD if the node actually turns out to be an
6654 static inline unsigned
6655 simple_type_align_in_bits (type
)
6658 return (TREE_CODE (type
) != ERROR_MARK
) ? TYPE_ALIGN (type
) : BITS_PER_WORD
;
6661 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6662 node, return the size in bits for the type if it is a constant, or else
6663 return the alignment for the type if the type's size is not constant, or
6664 else return BITS_PER_WORD if the type actually turns out to be an
6667 static inline unsigned
6668 simple_type_size_in_bits (type
)
6671 if (TREE_CODE (type
) == ERROR_MARK
)
6672 return BITS_PER_WORD
;
6675 register tree type_size_tree
= TYPE_SIZE (type
);
6677 if (TREE_CODE (type_size_tree
) != INTEGER_CST
)
6678 return TYPE_ALIGN (type
);
6680 return (unsigned) TREE_INT_CST_LOW (type_size_tree
);
6684 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6685 return the byte offset of the lowest addressed byte of the "containing
6686 object" for the given FIELD_DECL, or return 0 if we are unable to
6687 determine what that offset is, either because the argument turns out to
6688 be a pointer to an ERROR_MARK node, or because the offset is actually
6689 variable. (We can't handle the latter case just yet). */
6692 field_byte_offset (decl
)
6695 register unsigned type_align_in_bytes
;
6696 register unsigned type_align_in_bits
;
6697 register unsigned type_size_in_bits
;
6698 register unsigned object_offset_in_align_units
;
6699 register unsigned object_offset_in_bits
;
6700 register unsigned object_offset_in_bytes
;
6702 register tree bitpos_tree
;
6703 register tree field_size_tree
;
6704 register unsigned bitpos_int
;
6705 register unsigned deepest_bitpos
;
6706 register unsigned field_size_in_bits
;
6708 if (TREE_CODE (decl
) == ERROR_MARK
)
6711 if (TREE_CODE (decl
) != FIELD_DECL
)
6714 type
= field_type (decl
);
6716 bitpos_tree
= DECL_FIELD_BITPOS (decl
);
6717 field_size_tree
= DECL_SIZE (decl
);
6719 /* We cannot yet cope with fields whose positions or sizes are variable, so
6720 for now, when we see such things, we simply return 0. Someday, we may
6721 be able to handle such cases, but it will be damn difficult. */
6722 if (TREE_CODE (bitpos_tree
) != INTEGER_CST
)
6724 bitpos_int
= (unsigned) TREE_INT_CST_LOW (bitpos_tree
);
6726 if (TREE_CODE (field_size_tree
) != INTEGER_CST
)
6729 field_size_in_bits
= (unsigned) TREE_INT_CST_LOW (field_size_tree
);
6730 type_size_in_bits
= simple_type_size_in_bits (type
);
6731 type_align_in_bits
= simple_type_align_in_bits (type
);
6732 type_align_in_bytes
= type_align_in_bits
/ BITS_PER_UNIT
;
6734 /* Note that the GCC front-end doesn't make any attempt to keep track of
6735 the starting bit offset (relative to the start of the containing
6736 structure type) of the hypothetical "containing object" for a bit-
6737 field. Thus, when computing the byte offset value for the start of the
6738 "containing object" of a bit-field, we must deduce this information on
6739 our own. This can be rather tricky to do in some cases. For example,
6740 handling the following structure type definition when compiling for an
6741 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6744 struct S { int field1; long long field2:31; };
6746 Fortunately, there is a simple rule-of-thumb which can be
6747 used in such cases. When compiling for an i386/i486, GCC will allocate
6748 8 bytes for the structure shown above. It decides to do this based upon
6749 one simple rule for bit-field allocation. Quite simply, GCC allocates
6750 each "containing object" for each bit-field at the first (i.e. lowest
6751 addressed) legitimate alignment boundary (based upon the required
6752 minimum alignment for the declared type of the field) which it can
6753 possibly use, subject to the condition that there is still enough
6754 available space remaining in the containing object (when allocated at
6755 the selected point) to fully accommodate all of the bits of the
6756 bit-field itself. This simple rule makes it obvious why GCC allocates
6757 8 bytes for each object of the structure type shown above. When looking
6758 for a place to allocate the "containing object" for `field2', the
6759 compiler simply tries to allocate a 64-bit "containing object" at each
6760 successive 32-bit boundary (starting at zero) until it finds a place to
6761 allocate that 64- bit field such that at least 31 contiguous (and
6762 previously unallocated) bits remain within that selected 64 bit field.
6763 (As it turns out, for the example above, the compiler finds that it is
6764 OK to allocate the "containing object" 64-bit field at bit-offset zero
6765 within the structure type.) Here we attempt to work backwards from the
6766 limited set of facts we're given, and we try to deduce from those facts,
6767 where GCC must have believed that the containing object started (within
6768 the structure type). The value we deduce is then used (by the callers of
6769 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6770 for fields (both bit-fields and, in the case of DW_AT_location, regular
6773 /* Figure out the bit-distance from the start of the structure to the
6774 "deepest" bit of the bit-field. */
6775 deepest_bitpos
= bitpos_int
+ field_size_in_bits
;
6777 /* This is the tricky part. Use some fancy footwork to deduce where the
6778 lowest addressed bit of the containing object must be. */
6779 object_offset_in_bits
6780 = ceiling (deepest_bitpos
, type_align_in_bits
) - type_size_in_bits
;
6782 /* Compute the offset of the containing object in "alignment units". */
6783 object_offset_in_align_units
= object_offset_in_bits
/ type_align_in_bits
;
6785 /* Compute the offset of the containing object in bytes. */
6786 object_offset_in_bytes
= object_offset_in_align_units
* type_align_in_bytes
;
6788 return object_offset_in_bytes
;
6791 /* The following routines define various Dwarf attributes and any data
6792 associated with them. */
6794 /* Add a location description attribute value to a DIE.
6796 This emits location attributes suitable for whole variables and
6797 whole parameters. Note that the location attributes for struct fields are
6798 generated by the routine `data_member_location_attribute' below. */
6801 add_AT_location_description (die
, attr_kind
, rtl
)
6803 enum dwarf_attribute attr_kind
;
6806 /* Handle a special case. If we are about to output a location descriptor
6807 for a variable or parameter which has been optimized out of existence,
6808 don't do that. A variable which has been optimized out
6809 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6810 Currently, in some rare cases, variables can have DECL_RTL values which
6811 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6812 elsewhere in the compiler. We treat such cases as if the variable(s) in
6813 question had been optimized out of existence. */
6815 if (is_pseudo_reg (rtl
)
6816 || (GET_CODE (rtl
) == MEM
6817 && is_pseudo_reg (XEXP (rtl
, 0)))
6818 || (GET_CODE (rtl
) == CONCAT
6819 && is_pseudo_reg (XEXP (rtl
, 0))
6820 && is_pseudo_reg (XEXP (rtl
, 1))))
6823 add_AT_loc (die
, attr_kind
, loc_descriptor (rtl
));
6826 /* Attach the specialized form of location attribute used for data
6827 members of struct and union types. In the special case of a
6828 FIELD_DECL node which represents a bit-field, the "offset" part
6829 of this special location descriptor must indicate the distance
6830 in bytes from the lowest-addressed byte of the containing struct
6831 or union type to the lowest-addressed byte of the "containing
6832 object" for the bit-field. (See the `field_byte_offset' function
6833 above).. For any given bit-field, the "containing object" is a
6834 hypothetical object (of some integral or enum type) within which
6835 the given bit-field lives. The type of this hypothetical
6836 "containing object" is always the same as the declared type of
6837 the individual bit-field itself (for GCC anyway... the DWARF
6838 spec doesn't actually mandate this). Note that it is the size
6839 (in bytes) of the hypothetical "containing object" which will
6840 be given in the DW_AT_byte_size attribute for this bit-field.
6841 (See the `byte_size_attribute' function below.) It is also used
6842 when calculating the value of the DW_AT_bit_offset attribute.
6843 (See the `bit_offset_attribute' function below). */
6846 add_data_member_location_attribute (die
, decl
)
6847 register dw_die_ref die
;
6850 register unsigned long offset
;
6851 register dw_loc_descr_ref loc_descr
;
6852 register enum dwarf_location_atom op
;
6854 if (TREE_CODE (decl
) == TREE_VEC
)
6855 offset
= TREE_INT_CST_LOW (BINFO_OFFSET (decl
));
6857 offset
= field_byte_offset (decl
);
6859 /* The DWARF2 standard says that we should assume that the structure address
6860 is already on the stack, so we can specify a structure field address
6861 by using DW_OP_plus_uconst. */
6863 #ifdef MIPS_DEBUGGING_INFO
6864 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6865 correctly. It works only if we leave the offset on the stack. */
6868 op
= DW_OP_plus_uconst
;
6871 loc_descr
= new_loc_descr (op
, offset
, 0);
6872 add_AT_loc (die
, DW_AT_data_member_location
, loc_descr
);
6875 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6876 does not have a "location" either in memory or in a register. These
6877 things can arise in GNU C when a constant is passed as an actual parameter
6878 to an inlined function. They can also arise in C++ where declared
6879 constants do not necessarily get memory "homes". */
6882 add_const_value_attribute (die
, rtl
)
6883 register dw_die_ref die
;
6886 switch (GET_CODE (rtl
))
6889 /* Note that a CONST_INT rtx could represent either an integer or a
6890 floating-point constant. A CONST_INT is used whenever the constant
6891 will fit into a single word. In all such cases, the original mode
6892 of the constant value is wiped out, and the CONST_INT rtx is
6893 assigned VOIDmode. */
6894 add_AT_unsigned (die
, DW_AT_const_value
, (unsigned) INTVAL (rtl
));
6898 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6899 floating-point constant. A CONST_DOUBLE is used whenever the
6900 constant requires more than one word in order to be adequately
6901 represented. We output CONST_DOUBLEs as blocks. */
6903 register enum machine_mode mode
= GET_MODE (rtl
);
6905 if (GET_MODE_CLASS (mode
) == MODE_FLOAT
)
6907 register unsigned length
= GET_MODE_SIZE (mode
) / sizeof (long);
6911 REAL_VALUE_FROM_CONST_DOUBLE (rv
, rtl
);
6915 REAL_VALUE_TO_TARGET_SINGLE (rv
, array
[0]);
6919 REAL_VALUE_TO_TARGET_DOUBLE (rv
, array
);
6924 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv
, array
);
6931 add_AT_float (die
, DW_AT_const_value
, length
, array
);
6934 add_AT_long_long (die
, DW_AT_const_value
,
6935 CONST_DOUBLE_HIGH (rtl
), CONST_DOUBLE_LOW (rtl
));
6940 add_AT_string (die
, DW_AT_const_value
, XSTR (rtl
, 0));
6946 add_AT_addr (die
, DW_AT_const_value
, addr_to_string (rtl
));
6950 /* In cases where an inlined instance of an inline function is passed
6951 the address of an `auto' variable (which is local to the caller) we
6952 can get a situation where the DECL_RTL of the artificial local
6953 variable (for the inlining) which acts as a stand-in for the
6954 corresponding formal parameter (of the inline function) will look
6955 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6956 exactly a compile-time constant expression, but it isn't the address
6957 of the (artificial) local variable either. Rather, it represents the
6958 *value* which the artificial local variable always has during its
6959 lifetime. We currently have no way to represent such quasi-constant
6960 values in Dwarf, so for now we just punt and generate nothing. */
6964 /* No other kinds of rtx should be possible here. */
6970 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6971 data attribute for a variable or a parameter. We generate the
6972 DW_AT_const_value attribute only in those cases where the given variable
6973 or parameter does not have a true "location" either in memory or in a
6974 register. This can happen (for example) when a constant is passed as an
6975 actual argument in a call to an inline function. (It's possible that
6976 these things can crop up in other ways also.) Note that one type of
6977 constant value which can be passed into an inlined function is a constant
6978 pointer. This can happen for example if an actual argument in an inlined
6979 function call evaluates to a compile-time constant address. */
6982 add_location_or_const_value_attribute (die
, decl
)
6983 register dw_die_ref die
;
6987 register tree declared_type
;
6988 register tree passed_type
;
6990 if (TREE_CODE (decl
) == ERROR_MARK
)
6993 if (TREE_CODE (decl
) != VAR_DECL
&& TREE_CODE (decl
) != PARM_DECL
)
6996 /* Here we have to decide where we are going to say the parameter "lives"
6997 (as far as the debugger is concerned). We only have a couple of
6998 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
7000 DECL_RTL normally indicates where the parameter lives during most of the
7001 activation of the function. If optimization is enabled however, this
7002 could be either NULL or else a pseudo-reg. Both of those cases indicate
7003 that the parameter doesn't really live anywhere (as far as the code
7004 generation parts of GCC are concerned) during most of the function's
7005 activation. That will happen (for example) if the parameter is never
7006 referenced within the function.
7008 We could just generate a location descriptor here for all non-NULL
7009 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
7010 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
7011 where DECL_RTL is NULL or is a pseudo-reg.
7013 Note however that we can only get away with using DECL_INCOMING_RTL as
7014 a backup substitute for DECL_RTL in certain limited cases. In cases
7015 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7016 we can be sure that the parameter was passed using the same type as it is
7017 declared to have within the function, and that its DECL_INCOMING_RTL
7018 points us to a place where a value of that type is passed.
7020 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7021 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7022 because in these cases DECL_INCOMING_RTL points us to a value of some
7023 type which is *different* from the type of the parameter itself. Thus,
7024 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7025 such cases, the debugger would end up (for example) trying to fetch a
7026 `float' from a place which actually contains the first part of a
7027 `double'. That would lead to really incorrect and confusing
7028 output at debug-time.
7030 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7031 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7032 are a couple of exceptions however. On little-endian machines we can
7033 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7034 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7035 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7036 when (on a little-endian machine) a non-prototyped function has a
7037 parameter declared to be of type `short' or `char'. In such cases,
7038 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7039 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7040 passed `int' value. If the debugger then uses that address to fetch
7041 a `short' or a `char' (on a little-endian machine) the result will be
7042 the correct data, so we allow for such exceptional cases below.
7044 Note that our goal here is to describe the place where the given formal
7045 parameter lives during most of the function's activation (i.e. between
7046 the end of the prologue and the start of the epilogue). We'll do that
7047 as best as we can. Note however that if the given formal parameter is
7048 modified sometime during the execution of the function, then a stack
7049 backtrace (at debug-time) will show the function as having been
7050 called with the *new* value rather than the value which was
7051 originally passed in. This happens rarely enough that it is not
7052 a major problem, but it *is* a problem, and I'd like to fix it.
7054 A future version of dwarf2out.c may generate two additional
7055 attributes for any given DW_TAG_formal_parameter DIE which will
7056 describe the "passed type" and the "passed location" for the
7057 given formal parameter in addition to the attributes we now
7058 generate to indicate the "declared type" and the "active
7059 location" for each parameter. This additional set of attributes
7060 could be used by debuggers for stack backtraces. Separately, note
7061 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7062 NULL also. This happens (for example) for inlined-instances of
7063 inline function formal parameters which are never referenced.
7064 This really shouldn't be happening. All PARM_DECL nodes should
7065 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7066 doesn't currently generate these values for inlined instances of
7067 inline function parameters, so when we see such cases, we are
7068 just out-of-luck for the time being (until integrate.c
7071 /* Use DECL_RTL as the "location" unless we find something better. */
7072 rtl
= DECL_RTL (decl
);
7074 if (TREE_CODE (decl
) == PARM_DECL
)
7076 if (rtl
== NULL_RTX
|| is_pseudo_reg (rtl
))
7078 declared_type
= type_main_variant (TREE_TYPE (decl
));
7079 passed_type
= type_main_variant (DECL_ARG_TYPE (decl
));
7081 /* This decl represents a formal parameter which was optimized out.
7082 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7083 all* cases where (rtl == NULL_RTX) just below. */
7084 if (declared_type
== passed_type
)
7085 rtl
= DECL_INCOMING_RTL (decl
);
7086 else if (! BYTES_BIG_ENDIAN
7087 && TREE_CODE (declared_type
) == INTEGER_TYPE
7088 && TYPE_SIZE (declared_type
) <= TYPE_SIZE (passed_type
))
7089 rtl
= DECL_INCOMING_RTL (decl
);
7093 if (rtl
== NULL_RTX
)
7096 rtl
= eliminate_regs (rtl
, 0, NULL_RTX
);
7097 #ifdef LEAF_REG_REMAP
7099 leaf_renumber_regs_insn (rtl
);
7102 switch (GET_CODE (rtl
))
7105 /* The address of a variable that was optimized away; don't emit
7116 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7117 add_const_value_attribute (die
, rtl
);
7124 add_AT_location_description (die
, DW_AT_location
, rtl
);
7132 /* Generate an DW_AT_name attribute given some string value to be included as
7133 the value of the attribute. */
7136 add_name_attribute (die
, name_string
)
7137 register dw_die_ref die
;
7138 register char *name_string
;
7140 if (name_string
!= NULL
&& *name_string
!= 0)
7141 add_AT_string (die
, DW_AT_name
, name_string
);
7144 /* Given a tree node describing an array bound (either lower or upper) output
7145 a representation for that bound. */
7148 add_bound_info (subrange_die
, bound_attr
, bound
)
7149 register dw_die_ref subrange_die
;
7150 register enum dwarf_attribute bound_attr
;
7151 register tree bound
;
7153 register unsigned bound_value
= 0;
7155 /* If this is an Ada unconstrained array type, then don't emit any debug
7156 info because the array bounds are unknown. They are parameterized when
7157 the type is instantiated. */
7158 if (contains_placeholder_p (bound
))
7161 switch (TREE_CODE (bound
))
7166 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7168 bound_value
= TREE_INT_CST_LOW (bound
);
7169 if (bound_attr
== DW_AT_lower_bound
7170 && ((is_c_family () && bound_value
== 0)
7171 || (is_fortran () && bound_value
== 1)))
7172 /* use the default */;
7174 add_AT_unsigned (subrange_die
, bound_attr
, bound_value
);
7179 case NON_LVALUE_EXPR
:
7180 add_bound_info (subrange_die
, bound_attr
, TREE_OPERAND (bound
, 0));
7184 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7185 access the upper bound values may be bogus. If they refer to a
7186 register, they may only describe how to get at these values at the
7187 points in the generated code right after they have just been
7188 computed. Worse yet, in the typical case, the upper bound values
7189 will not even *be* computed in the optimized code (though the
7190 number of elements will), so these SAVE_EXPRs are entirely
7191 bogus. In order to compensate for this fact, we check here to see
7192 if optimization is enabled, and if so, we don't add an attribute
7193 for the (unknown and unknowable) upper bound. This should not
7194 cause too much trouble for existing (stupid?) debuggers because
7195 they have to deal with empty upper bounds location descriptions
7196 anyway in order to be able to deal with incomplete array types.
7197 Of course an intelligent debugger (GDB?) should be able to
7198 comprehend that a missing upper bound specification in a array
7199 type used for a storage class `auto' local array variable
7200 indicates that the upper bound is both unknown (at compile- time)
7201 and unknowable (at run-time) due to optimization.
7203 We assume that a MEM rtx is safe because gcc wouldn't put the
7204 value there unless it was going to be used repeatedly in the
7205 function, i.e. for cleanups. */
7206 if (! optimize
|| GET_CODE (SAVE_EXPR_RTL (bound
)) == MEM
)
7208 register dw_die_ref ctx
= lookup_decl_die (current_function_decl
);
7209 register dw_die_ref decl_die
= new_die (DW_TAG_variable
, ctx
);
7210 register rtx loc
= SAVE_EXPR_RTL (bound
);
7212 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7213 it references an outer function's frame. */
7215 if (GET_CODE (loc
) == MEM
)
7217 rtx new_addr
= fix_lexical_addr (XEXP (loc
, 0), bound
);
7219 if (XEXP (loc
, 0) != new_addr
)
7220 loc
= gen_rtx (MEM
, GET_MODE (loc
), new_addr
);
7223 add_AT_flag (decl_die
, DW_AT_artificial
, 1);
7224 add_type_attribute (decl_die
, TREE_TYPE (bound
), 1, 0, ctx
);
7225 add_AT_location_description (decl_die
, DW_AT_location
, loc
);
7226 add_AT_die_ref (subrange_die
, bound_attr
, decl_die
);
7229 /* Else leave out the attribute. */
7235 /* ??? These types of bounds can be created by the Ada front end,
7236 and it isn't clear how to emit debug info for them. */
7244 /* Note that the block of subscript information for an array type also
7245 includes information about the element type of type given array type. */
7248 add_subscript_info (type_die
, type
)
7249 register dw_die_ref type_die
;
7252 #ifndef MIPS_DEBUGGING_INFO
7253 register unsigned dimension_number
;
7255 register tree lower
, upper
;
7256 register dw_die_ref subrange_die
;
7258 /* The GNU compilers represent multidimensional array types as sequences of
7259 one dimensional array types whose element types are themselves array
7260 types. Here we squish that down, so that each multidimensional array
7261 type gets only one array_type DIE in the Dwarf debugging info. The draft
7262 Dwarf specification say that we are allowed to do this kind of
7263 compression in C (because there is no difference between an array or
7264 arrays and a multidimensional array in C) but for other source languages
7265 (e.g. Ada) we probably shouldn't do this. */
7267 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7268 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7269 We work around this by disabling this feature. See also
7270 gen_array_type_die. */
7271 #ifndef MIPS_DEBUGGING_INFO
7272 for (dimension_number
= 0;
7273 TREE_CODE (type
) == ARRAY_TYPE
;
7274 type
= TREE_TYPE (type
), dimension_number
++)
7277 register tree domain
= TYPE_DOMAIN (type
);
7279 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7280 and (in GNU C only) variable bounds. Handle all three forms
7282 subrange_die
= new_die (DW_TAG_subrange_type
, type_die
);
7285 /* We have an array type with specified bounds. */
7286 lower
= TYPE_MIN_VALUE (domain
);
7287 upper
= TYPE_MAX_VALUE (domain
);
7289 /* define the index type. */
7290 if (TREE_TYPE (domain
))
7292 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7293 TREE_TYPE field. We can't emit debug info for this
7294 because it is an unnamed integral type. */
7295 if (TREE_CODE (domain
) == INTEGER_TYPE
7296 && TYPE_NAME (domain
) == NULL_TREE
7297 && TREE_CODE (TREE_TYPE (domain
)) == INTEGER_TYPE
7298 && TYPE_NAME (TREE_TYPE (domain
)) == NULL_TREE
)
7301 add_type_attribute (subrange_die
, TREE_TYPE (domain
), 0, 0,
7305 /* ??? If upper is NULL, the array has unspecified length,
7306 but it does have a lower bound. This happens with Fortran
7308 Since the debugger is definitely going to need to know N
7309 to produce useful results, go ahead and output the lower
7310 bound solo, and hope the debugger can cope. */
7312 add_bound_info (subrange_die
, DW_AT_lower_bound
, lower
);
7314 add_bound_info (subrange_die
, DW_AT_upper_bound
, upper
);
7317 /* We have an array type with an unspecified length. The DWARF-2
7318 spec does not say how to handle this; let's just leave out the
7323 #ifndef MIPS_DEBUGGING_INFO
7329 add_byte_size_attribute (die
, tree_node
)
7331 register tree tree_node
;
7333 register unsigned size
;
7335 switch (TREE_CODE (tree_node
))
7343 case QUAL_UNION_TYPE
:
7344 size
= int_size_in_bytes (tree_node
);
7347 /* For a data member of a struct or union, the DW_AT_byte_size is
7348 generally given as the number of bytes normally allocated for an
7349 object of the *declared* type of the member itself. This is true
7350 even for bit-fields. */
7351 size
= simple_type_size_in_bits (field_type (tree_node
)) / BITS_PER_UNIT
;
7357 /* Note that `size' might be -1 when we get to this point. If it is, that
7358 indicates that the byte size of the entity in question is variable. We
7359 have no good way of expressing this fact in Dwarf at the present time,
7360 so just let the -1 pass on through. */
7362 add_AT_unsigned (die
, DW_AT_byte_size
, size
);
7365 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7366 which specifies the distance in bits from the highest order bit of the
7367 "containing object" for the bit-field to the highest order bit of the
7370 For any given bit-field, the "containing object" is a hypothetical
7371 object (of some integral or enum type) within which the given bit-field
7372 lives. The type of this hypothetical "containing object" is always the
7373 same as the declared type of the individual bit-field itself. The
7374 determination of the exact location of the "containing object" for a
7375 bit-field is rather complicated. It's handled by the
7376 `field_byte_offset' function (above).
7378 Note that it is the size (in bytes) of the hypothetical "containing object"
7379 which will be given in the DW_AT_byte_size attribute for this bit-field.
7380 (See `byte_size_attribute' above). */
7383 add_bit_offset_attribute (die
, decl
)
7384 register dw_die_ref die
;
7387 register unsigned object_offset_in_bytes
= field_byte_offset (decl
);
7388 register tree type
= DECL_BIT_FIELD_TYPE (decl
);
7389 register tree bitpos_tree
= DECL_FIELD_BITPOS (decl
);
7390 register unsigned bitpos_int
;
7391 register unsigned highest_order_object_bit_offset
;
7392 register unsigned highest_order_field_bit_offset
;
7393 register unsigned bit_offset
;
7395 /* Must be a field and a bit field. */
7397 || TREE_CODE (decl
) != FIELD_DECL
)
7400 /* We can't yet handle bit-fields whose offsets are variable, so if we
7401 encounter such things, just return without generating any attribute
7403 if (TREE_CODE (bitpos_tree
) != INTEGER_CST
)
7406 bitpos_int
= (unsigned) TREE_INT_CST_LOW (bitpos_tree
);
7408 /* Note that the bit offset is always the distance (in bits) from the
7409 highest-order bit of the "containing object" to the highest-order bit of
7410 the bit-field itself. Since the "high-order end" of any object or field
7411 is different on big-endian and little-endian machines, the computation
7412 below must take account of these differences. */
7413 highest_order_object_bit_offset
= object_offset_in_bytes
* BITS_PER_UNIT
;
7414 highest_order_field_bit_offset
= bitpos_int
;
7416 if (! BYTES_BIG_ENDIAN
)
7418 highest_order_field_bit_offset
7419 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl
));
7421 highest_order_object_bit_offset
+= simple_type_size_in_bits (type
);
7425 = (! BYTES_BIG_ENDIAN
7426 ? highest_order_object_bit_offset
- highest_order_field_bit_offset
7427 : highest_order_field_bit_offset
- highest_order_object_bit_offset
);
7429 add_AT_unsigned (die
, DW_AT_bit_offset
, bit_offset
);
7432 /* For a FIELD_DECL node which represents a bit field, output an attribute
7433 which specifies the length in bits of the given field. */
7436 add_bit_size_attribute (die
, decl
)
7437 register dw_die_ref die
;
7440 /* Must be a field and a bit field. */
7441 if (TREE_CODE (decl
) != FIELD_DECL
7442 || ! DECL_BIT_FIELD_TYPE (decl
))
7444 add_AT_unsigned (die
, DW_AT_bit_size
,
7445 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl
)));
7448 /* If the compiled language is ANSI C, then add a 'prototyped'
7449 attribute, if arg types are given for the parameters of a function. */
7452 add_prototyped_attribute (die
, func_type
)
7453 register dw_die_ref die
;
7454 register tree func_type
;
7456 if (get_AT_unsigned (comp_unit_die
, DW_AT_language
) == DW_LANG_C89
7457 && TYPE_ARG_TYPES (func_type
) != NULL
)
7458 add_AT_flag (die
, DW_AT_prototyped
, 1);
7462 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7463 by looking in either the type declaration or object declaration
7467 add_abstract_origin_attribute (die
, origin
)
7468 register dw_die_ref die
;
7469 register tree origin
;
7471 dw_die_ref origin_die
= NULL
;
7472 if (TREE_CODE_CLASS (TREE_CODE (origin
)) == 'd')
7473 origin_die
= lookup_decl_die (origin
);
7474 else if (TREE_CODE_CLASS (TREE_CODE (origin
)) == 't')
7475 origin_die
= lookup_type_die (origin
);
7477 add_AT_die_ref (die
, DW_AT_abstract_origin
, origin_die
);
7480 /* We do not currently support the pure_virtual attribute. */
7483 add_pure_or_virtual_attribute (die
, func_decl
)
7484 register dw_die_ref die
;
7485 register tree func_decl
;
7487 if (DECL_VINDEX (func_decl
))
7489 add_AT_unsigned (die
, DW_AT_virtuality
, DW_VIRTUALITY_virtual
);
7490 add_AT_loc (die
, DW_AT_vtable_elem_location
,
7491 new_loc_descr (DW_OP_constu
,
7492 TREE_INT_CST_LOW (DECL_VINDEX (func_decl
)),
7495 /* GNU extension: Record what type this method came from originally. */
7496 if (debug_info_level
> DINFO_LEVEL_TERSE
)
7497 add_AT_die_ref (die
, DW_AT_containing_type
,
7498 lookup_type_die (DECL_CONTEXT (func_decl
)));
7502 /* Add source coordinate attributes for the given decl. */
7505 add_src_coords_attributes (die
, decl
)
7506 register dw_die_ref die
;
7509 register unsigned file_index
= lookup_filename (DECL_SOURCE_FILE (decl
));
7511 add_AT_unsigned (die
, DW_AT_decl_file
, file_index
);
7512 add_AT_unsigned (die
, DW_AT_decl_line
, DECL_SOURCE_LINE (decl
));
7515 /* Add an DW_AT_name attribute and source coordinate attribute for the
7516 given decl, but only if it actually has a name. */
7519 add_name_and_src_coords_attributes (die
, decl
)
7520 register dw_die_ref die
;
7523 register tree decl_name
;
7525 decl_name
= DECL_NAME (decl
);
7526 if (decl_name
!= NULL
&& IDENTIFIER_POINTER (decl_name
) != NULL
)
7528 add_name_attribute (die
, dwarf2_name (decl
, 0));
7529 add_src_coords_attributes (die
, decl
);
7530 if ((TREE_CODE (decl
) == FUNCTION_DECL
|| TREE_CODE (decl
) == VAR_DECL
)
7531 && DECL_ASSEMBLER_NAME (decl
) != DECL_NAME (decl
))
7532 add_AT_string (die
, DW_AT_MIPS_linkage_name
,
7533 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)));
7537 /* Push a new declaration scope. */
7540 push_decl_scope (scope
)
7543 tree containing_scope
;
7546 /* Make room in the decl_scope_table, if necessary. */
7547 if (decl_scope_table_allocated
== decl_scope_depth
)
7549 decl_scope_table_allocated
+= DECL_SCOPE_TABLE_INCREMENT
;
7551 = (decl_scope_node
*) xrealloc (decl_scope_table
,
7552 (decl_scope_table_allocated
7553 * sizeof (decl_scope_node
)));
7556 decl_scope_table
[decl_scope_depth
].scope
= scope
;
7558 /* Sometimes, while recursively emitting subtypes within a class type,
7559 we end up recuring on a subtype at a higher level then the current
7560 subtype. In such a case, we need to search the decl_scope_table to
7561 find the parent of this subtype. */
7563 if (AGGREGATE_TYPE_P (scope
))
7564 containing_scope
= TYPE_CONTEXT (scope
);
7566 containing_scope
= NULL_TREE
;
7568 /* The normal case. */
7569 if (decl_scope_depth
== 0
7570 || containing_scope
== NULL_TREE
7571 /* Ignore namespaces for the moment. */
7572 || TREE_CODE (containing_scope
) == NAMESPACE_DECL
7573 || containing_scope
== decl_scope_table
[decl_scope_depth
- 1].scope
)
7574 decl_scope_table
[decl_scope_depth
].previous
= decl_scope_depth
- 1;
7577 /* We need to search for the containing_scope. */
7578 for (i
= 0; i
< decl_scope_depth
; i
++)
7579 if (decl_scope_table
[i
].scope
== containing_scope
)
7582 if (i
== decl_scope_depth
)
7585 decl_scope_table
[decl_scope_depth
].previous
= i
;
7591 /* Return the DIE for the scope that immediately contains this declaration. */
7594 scope_die_for (t
, context_die
)
7596 register dw_die_ref context_die
;
7598 register dw_die_ref scope_die
= NULL
;
7599 register tree containing_scope
;
7602 /* Walk back up the declaration tree looking for a place to define
7604 if (TREE_CODE_CLASS (TREE_CODE (t
)) == 't')
7605 containing_scope
= TYPE_CONTEXT (t
);
7606 else if (TREE_CODE (t
) == FUNCTION_DECL
&& DECL_VINDEX (t
))
7607 containing_scope
= decl_class_context (t
);
7609 containing_scope
= DECL_CONTEXT (t
);
7611 /* Ignore namespaces for the moment. */
7612 if (containing_scope
&& TREE_CODE (containing_scope
) == NAMESPACE_DECL
)
7613 containing_scope
= NULL_TREE
;
7615 /* Ignore function type "scopes" from the C frontend. They mean that
7616 a tagged type is local to a parmlist of a function declarator, but
7617 that isn't useful to DWARF. */
7618 if (containing_scope
&& TREE_CODE (containing_scope
) == FUNCTION_TYPE
)
7619 containing_scope
= NULL_TREE
;
7621 /* Function-local tags and functions get stuck in limbo until they are
7622 fixed up by decls_for_scope. */
7623 if (context_die
== NULL
&& containing_scope
!= NULL_TREE
7624 && (TREE_CODE (t
) == FUNCTION_DECL
|| is_tagged_type (t
)))
7627 if (containing_scope
== NULL_TREE
)
7628 scope_die
= comp_unit_die
;
7631 for (i
= decl_scope_depth
- 1, scope_die
= context_die
;
7632 i
>= 0 && decl_scope_table
[i
].scope
!= containing_scope
;
7633 (scope_die
= scope_die
->die_parent
,
7634 i
= decl_scope_table
[i
].previous
))
7637 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7638 does it try to handle types defined by TYPE_DECLs. Such types
7639 thus have an incorrect TYPE_CONTEXT, which points to the block
7640 they were originally defined in, instead of the current block
7641 created by function inlining. We try to detect that here and
7644 if (i
< 0 && scope_die
== comp_unit_die
7645 && TREE_CODE (containing_scope
) == BLOCK
7646 && is_tagged_type (t
)
7647 && (block_ultimate_origin (decl_scope_table
[decl_scope_depth
- 1].scope
)
7648 == containing_scope
))
7650 scope_die
= context_die
;
7651 /* Since the checks below are no longer applicable. */
7657 if (scope_die
!= comp_unit_die
7658 || TREE_CODE_CLASS (TREE_CODE (containing_scope
)) != 't')
7660 if (debug_info_level
> DINFO_LEVEL_TERSE
7661 && !TREE_ASM_WRITTEN (containing_scope
))
7669 /* Pop a declaration scope. */
7673 if (decl_scope_depth
<= 0)
7678 /* Many forms of DIEs require a "type description" attribute. This
7679 routine locates the proper "type descriptor" die for the type given
7680 by 'type', and adds an DW_AT_type attribute below the given die. */
7683 add_type_attribute (object_die
, type
, decl_const
, decl_volatile
, context_die
)
7684 register dw_die_ref object_die
;
7686 register int decl_const
;
7687 register int decl_volatile
;
7688 register dw_die_ref context_die
;
7690 register enum tree_code code
= TREE_CODE (type
);
7691 register dw_die_ref type_die
= NULL
;
7693 /* ??? If this type is an unnamed subrange type of an integral or
7694 floating-point type, use the inner type. This is because we have no
7695 support for unnamed types in base_type_die. This can happen if this is
7696 an Ada subrange type. Correct solution is emit a subrange type die. */
7697 if ((code
== INTEGER_TYPE
|| code
== REAL_TYPE
)
7698 && TREE_TYPE (type
) != 0 && TYPE_NAME (type
) == 0)
7699 type
= TREE_TYPE (type
), code
= TREE_CODE (type
);
7701 if (code
== ERROR_MARK
)
7704 /* Handle a special case. For functions whose return type is void, we
7705 generate *no* type attribute. (Note that no object may have type
7706 `void', so this only applies to function return types). */
7707 if (code
== VOID_TYPE
)
7710 type_die
= modified_type_die (type
,
7711 decl_const
|| TYPE_READONLY (type
),
7712 decl_volatile
|| TYPE_VOLATILE (type
),
7714 if (type_die
!= NULL
)
7715 add_AT_die_ref (object_die
, DW_AT_type
, type_die
);
7718 /* Given a tree pointer to a struct, class, union, or enum type node, return
7719 a pointer to the (string) tag name for the given type, or zero if the type
7720 was declared without a tag. */
7726 register char *name
= 0;
7728 if (TYPE_NAME (type
) != 0)
7730 register tree t
= 0;
7732 /* Find the IDENTIFIER_NODE for the type name. */
7733 if (TREE_CODE (TYPE_NAME (type
)) == IDENTIFIER_NODE
)
7734 t
= TYPE_NAME (type
);
7736 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7737 a TYPE_DECL node, regardless of whether or not a `typedef' was
7739 else if (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7740 && ! DECL_IGNORED_P (TYPE_NAME (type
)))
7741 t
= DECL_NAME (TYPE_NAME (type
));
7743 /* Now get the name as a string, or invent one. */
7745 name
= IDENTIFIER_POINTER (t
);
7748 return (name
== 0 || *name
== '\0') ? 0 : name
;
7751 /* Return the type associated with a data member, make a special check
7752 for bit field types. */
7755 member_declared_type (member
)
7756 register tree member
;
7758 return (DECL_BIT_FIELD_TYPE (member
)
7759 ? DECL_BIT_FIELD_TYPE (member
)
7760 : TREE_TYPE (member
));
7763 /* Get the decl's label, as described by its RTL. This may be different
7764 from the DECL_NAME name used in the source file. */
7768 decl_start_label (decl
)
7773 x
= DECL_RTL (decl
);
7774 if (GET_CODE (x
) != MEM
)
7778 if (GET_CODE (x
) != SYMBOL_REF
)
7781 fnname
= XSTR (x
, 0);
7786 /* These routines generate the internal representation of the DIE's for
7787 the compilation unit. Debugging information is collected by walking
7788 the declaration trees passed in from dwarf2out_decl(). */
7791 gen_array_type_die (type
, context_die
)
7793 register dw_die_ref context_die
;
7795 register dw_die_ref scope_die
= scope_die_for (type
, context_die
);
7796 register dw_die_ref array_die
;
7797 register tree element_type
;
7799 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7800 the inner array type comes before the outer array type. Thus we must
7801 call gen_type_die before we call new_die. See below also. */
7802 #ifdef MIPS_DEBUGGING_INFO
7803 gen_type_die (TREE_TYPE (type
), context_die
);
7806 array_die
= new_die (DW_TAG_array_type
, scope_die
);
7809 /* We default the array ordering. SDB will probably do
7810 the right things even if DW_AT_ordering is not present. It's not even
7811 an issue until we start to get into multidimensional arrays anyway. If
7812 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7813 then we'll have to put the DW_AT_ordering attribute back in. (But if
7814 and when we find out that we need to put these in, we will only do so
7815 for multidimensional arrays. */
7816 add_AT_unsigned (array_die
, DW_AT_ordering
, DW_ORD_row_major
);
7819 #ifdef MIPS_DEBUGGING_INFO
7820 /* The SGI compilers handle arrays of unknown bound by setting
7821 AT_declaration and not emitting any subrange DIEs. */
7822 if (! TYPE_DOMAIN (type
))
7823 add_AT_unsigned (array_die
, DW_AT_declaration
, 1);
7826 add_subscript_info (array_die
, type
);
7828 equate_type_number_to_die (type
, array_die
);
7830 /* Add representation of the type of the elements of this array type. */
7831 element_type
= TREE_TYPE (type
);
7833 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7834 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7835 We work around this by disabling this feature. See also
7836 add_subscript_info. */
7837 #ifndef MIPS_DEBUGGING_INFO
7838 while (TREE_CODE (element_type
) == ARRAY_TYPE
)
7839 element_type
= TREE_TYPE (element_type
);
7841 gen_type_die (element_type
, context_die
);
7844 add_type_attribute (array_die
, element_type
, 0, 0, context_die
);
7848 gen_set_type_die (type
, context_die
)
7850 register dw_die_ref context_die
;
7852 register dw_die_ref type_die
7853 = new_die (DW_TAG_set_type
, scope_die_for (type
, context_die
));
7855 equate_type_number_to_die (type
, type_die
);
7856 add_type_attribute (type_die
, TREE_TYPE (type
), 0, 0, context_die
);
7861 gen_entry_point_die (decl
, context_die
)
7863 register dw_die_ref context_die
;
7865 register tree origin
= decl_ultimate_origin (decl
);
7866 register dw_die_ref decl_die
= new_die (DW_TAG_entry_point
, context_die
);
7868 add_abstract_origin_attribute (decl_die
, origin
);
7871 add_name_and_src_coords_attributes (decl_die
, decl
);
7872 add_type_attribute (decl_die
, TREE_TYPE (TREE_TYPE (decl
)),
7876 if (DECL_ABSTRACT (decl
))
7877 equate_decl_number_to_die (decl
, decl_die
);
7879 add_AT_lbl_id (decl_die
, DW_AT_low_pc
, decl_start_label (decl
));
7883 /* Remember a type in the pending_types_list. */
7889 if (pending_types
== pending_types_allocated
)
7891 pending_types_allocated
+= PENDING_TYPES_INCREMENT
;
7893 = (tree
*) xrealloc (pending_types_list
,
7894 sizeof (tree
) * pending_types_allocated
);
7897 pending_types_list
[pending_types
++] = type
;
7900 /* Output any pending types (from the pending_types list) which we can output
7901 now (taking into account the scope that we are working on now).
7903 For each type output, remove the given type from the pending_types_list
7904 *before* we try to output it. */
7907 output_pending_types_for_scope (context_die
)
7908 register dw_die_ref context_die
;
7912 while (pending_types
)
7915 type
= pending_types_list
[pending_types
];
7916 gen_type_die (type
, context_die
);
7917 if (!TREE_ASM_WRITTEN (type
))
7922 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7925 gen_inlined_enumeration_type_die (type
, context_die
)
7927 register dw_die_ref context_die
;
7929 register dw_die_ref type_die
= new_die (DW_TAG_enumeration_type
,
7930 scope_die_for (type
, context_die
));
7932 if (!TREE_ASM_WRITTEN (type
))
7934 add_abstract_origin_attribute (type_die
, type
);
7937 /* Generate a DIE to represent an inlined instance of a structure type. */
7940 gen_inlined_structure_type_die (type
, context_die
)
7942 register dw_die_ref context_die
;
7944 register dw_die_ref type_die
= new_die (DW_TAG_structure_type
,
7945 scope_die_for (type
, context_die
));
7947 if (!TREE_ASM_WRITTEN (type
))
7949 add_abstract_origin_attribute (type_die
, type
);
7952 /* Generate a DIE to represent an inlined instance of a union type. */
7955 gen_inlined_union_type_die (type
, context_die
)
7957 register dw_die_ref context_die
;
7959 register dw_die_ref type_die
= new_die (DW_TAG_union_type
,
7960 scope_die_for (type
, context_die
));
7962 if (!TREE_ASM_WRITTEN (type
))
7964 add_abstract_origin_attribute (type_die
, type
);
7967 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7968 include all of the information about the enumeration values also. Each
7969 enumerated type name/value is listed as a child of the enumerated type
7973 gen_enumeration_type_die (type
, context_die
)
7975 register dw_die_ref context_die
;
7977 register dw_die_ref type_die
= lookup_type_die (type
);
7979 if (type_die
== NULL
)
7981 type_die
= new_die (DW_TAG_enumeration_type
,
7982 scope_die_for (type
, context_die
));
7983 equate_type_number_to_die (type
, type_die
);
7984 add_name_attribute (type_die
, type_tag (type
));
7986 else if (! TYPE_SIZE (type
))
7989 remove_AT (type_die
, DW_AT_declaration
);
7991 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7992 given enum type is incomplete, do not generate the DW_AT_byte_size
7993 attribute or the DW_AT_element_list attribute. */
7994 if (TYPE_SIZE (type
))
7998 TREE_ASM_WRITTEN (type
) = 1;
7999 add_byte_size_attribute (type_die
, type
);
8000 if (TYPE_STUB_DECL (type
) != NULL_TREE
)
8001 add_src_coords_attributes (type_die
, TYPE_STUB_DECL (type
));
8003 /* If the first reference to this type was as the return type of an
8004 inline function, then it may not have a parent. Fix this now. */
8005 if (type_die
->die_parent
== NULL
)
8006 add_child_die (scope_die_for (type
, context_die
), type_die
);
8008 for (link
= TYPE_FIELDS (type
);
8009 link
!= NULL
; link
= TREE_CHAIN (link
))
8011 register dw_die_ref enum_die
= new_die (DW_TAG_enumerator
, type_die
);
8013 add_name_attribute (enum_die
,
8014 IDENTIFIER_POINTER (TREE_PURPOSE (link
)));
8015 add_AT_unsigned (enum_die
, DW_AT_const_value
,
8016 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link
)));
8020 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8024 /* Generate a DIE to represent either a real live formal parameter decl or to
8025 represent just the type of some formal parameter position in some function
8028 Note that this routine is a bit unusual because its argument may be a
8029 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8030 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8031 node. If it's the former then this function is being called to output a
8032 DIE to represent a formal parameter object (or some inlining thereof). If
8033 it's the latter, then this function is only being called to output a
8034 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8035 argument type of some subprogram type. */
8038 gen_formal_parameter_die (node
, context_die
)
8040 register dw_die_ref context_die
;
8042 register dw_die_ref parm_die
8043 = new_die (DW_TAG_formal_parameter
, context_die
);
8044 register tree origin
;
8046 switch (TREE_CODE_CLASS (TREE_CODE (node
)))
8049 origin
= decl_ultimate_origin (node
);
8051 add_abstract_origin_attribute (parm_die
, origin
);
8054 add_name_and_src_coords_attributes (parm_die
, node
);
8055 add_type_attribute (parm_die
, TREE_TYPE (node
),
8056 TREE_READONLY (node
),
8057 TREE_THIS_VOLATILE (node
),
8059 if (DECL_ARTIFICIAL (node
))
8060 add_AT_flag (parm_die
, DW_AT_artificial
, 1);
8063 equate_decl_number_to_die (node
, parm_die
);
8064 if (! DECL_ABSTRACT (node
))
8065 add_location_or_const_value_attribute (parm_die
, node
);
8070 /* We were called with some kind of a ..._TYPE node. */
8071 add_type_attribute (parm_die
, node
, 0, 0, context_die
);
8081 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8082 at the end of an (ANSI prototyped) formal parameters list. */
8085 gen_unspecified_parameters_die (decl_or_type
, context_die
)
8086 register tree decl_or_type
;
8087 register dw_die_ref context_die
;
8089 new_die (DW_TAG_unspecified_parameters
, context_die
);
8092 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8093 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8094 parameters as specified in some function type specification (except for
8095 those which appear as part of a function *definition*).
8097 Note we must be careful here to output all of the parameter DIEs before*
8098 we output any DIEs needed to represent the types of the formal parameters.
8099 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8100 non-parameter DIE it sees ends the formal parameter list. */
8103 gen_formal_types_die (function_or_method_type
, context_die
)
8104 register tree function_or_method_type
;
8105 register dw_die_ref context_die
;
8108 register tree formal_type
= NULL
;
8109 register tree first_parm_type
= TYPE_ARG_TYPES (function_or_method_type
);
8112 /* In the case where we are generating a formal types list for a C++
8113 non-static member function type, skip over the first thing on the
8114 TYPE_ARG_TYPES list because it only represents the type of the hidden
8115 `this pointer'. The debugger should be able to figure out (without
8116 being explicitly told) that this non-static member function type takes a
8117 `this pointer' and should be able to figure what the type of that hidden
8118 parameter is from the DW_AT_member attribute of the parent
8119 DW_TAG_subroutine_type DIE. */
8120 if (TREE_CODE (function_or_method_type
) == METHOD_TYPE
)
8121 first_parm_type
= TREE_CHAIN (first_parm_type
);
8124 /* Make our first pass over the list of formal parameter types and output a
8125 DW_TAG_formal_parameter DIE for each one. */
8126 for (link
= first_parm_type
; link
; link
= TREE_CHAIN (link
))
8128 register dw_die_ref parm_die
;
8130 formal_type
= TREE_VALUE (link
);
8131 if (formal_type
== void_type_node
)
8134 /* Output a (nameless) DIE to represent the formal parameter itself. */
8135 parm_die
= gen_formal_parameter_die (formal_type
, context_die
);
8136 if (TREE_CODE (function_or_method_type
) == METHOD_TYPE
8137 && link
== first_parm_type
)
8138 add_AT_flag (parm_die
, DW_AT_artificial
, 1);
8141 /* If this function type has an ellipsis, add a
8142 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8143 if (formal_type
!= void_type_node
)
8144 gen_unspecified_parameters_die (function_or_method_type
, context_die
);
8146 /* Make our second (and final) pass over the list of formal parameter types
8147 and output DIEs to represent those types (as necessary). */
8148 for (link
= TYPE_ARG_TYPES (function_or_method_type
);
8150 link
= TREE_CHAIN (link
))
8152 formal_type
= TREE_VALUE (link
);
8153 if (formal_type
== void_type_node
)
8156 gen_type_die (formal_type
, context_die
);
8160 /* Generate a DIE to represent a declared function (either file-scope or
8164 gen_subprogram_die (decl
, context_die
)
8166 register dw_die_ref context_die
;
8168 char label_id
[MAX_ARTIFICIAL_LABEL_BYTES
];
8169 register tree origin
= decl_ultimate_origin (decl
);
8170 register dw_die_ref subr_die
;
8171 register rtx fp_reg
;
8172 register tree fn_arg_types
;
8173 register tree outer_scope
;
8174 register dw_die_ref old_die
= lookup_decl_die (decl
);
8175 register int declaration
8176 = (current_function_decl
!= decl
8178 && (context_die
->die_tag
== DW_TAG_structure_type
8179 || context_die
->die_tag
== DW_TAG_union_type
)));
8183 subr_die
= new_die (DW_TAG_subprogram
, context_die
);
8184 add_abstract_origin_attribute (subr_die
, origin
);
8186 else if (old_die
&& DECL_ABSTRACT (decl
)
8187 && get_AT_unsigned (old_die
, DW_AT_inline
))
8189 /* This must be a redefinition of an extern inline function.
8190 We can just reuse the old die here. */
8193 /* Clear out the inlined attribute and parm types. */
8194 remove_AT (subr_die
, DW_AT_inline
);
8195 remove_children (subr_die
);
8199 register unsigned file_index
8200 = lookup_filename (DECL_SOURCE_FILE (decl
));
8202 if (get_AT_flag (old_die
, DW_AT_declaration
) != 1)
8204 /* ??? This can happen if there is a bug in the program, for
8205 instance, if it has duplicate function definitions. Ideally,
8206 we should detect this case and ignore it. For now, if we have
8207 already reported an error, any error at all, then assume that
8208 we got here because of a input error, not a dwarf2 bug. */
8209 extern int errorcount
;
8215 /* If the definition comes from the same place as the declaration,
8216 maybe use the old DIE. We always want the DIE for this function
8217 that has the *_pc attributes to be under comp_unit_die so the
8218 debugger can find it. For inlines, that is the concrete instance,
8219 so we can use the old DIE here. For non-inline methods, we want a
8220 specification DIE at toplevel, so we need a new DIE. For local
8221 class methods, this does not apply. */
8222 if ((DECL_ABSTRACT (decl
) || old_die
->die_parent
== comp_unit_die
8223 || context_die
== NULL
)
8224 && get_AT_unsigned (old_die
, DW_AT_decl_file
) == file_index
8225 && (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8226 == DECL_SOURCE_LINE (decl
)))
8230 /* Clear out the declaration attribute and the parm types. */
8231 remove_AT (subr_die
, DW_AT_declaration
);
8232 remove_children (subr_die
);
8236 subr_die
= new_die (DW_TAG_subprogram
, context_die
);
8237 add_AT_die_ref (subr_die
, DW_AT_specification
, old_die
);
8238 if (get_AT_unsigned (old_die
, DW_AT_decl_file
) != file_index
)
8239 add_AT_unsigned (subr_die
, DW_AT_decl_file
, file_index
);
8240 if (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8241 != DECL_SOURCE_LINE (decl
))
8243 (subr_die
, DW_AT_decl_line
, DECL_SOURCE_LINE (decl
));
8248 register dw_die_ref scope_die
;
8250 if (DECL_CONTEXT (decl
))
8251 scope_die
= scope_die_for (decl
, context_die
);
8253 /* Don't put block extern declarations under comp_unit_die. */
8254 scope_die
= context_die
;
8256 subr_die
= new_die (DW_TAG_subprogram
, scope_die
);
8258 if (TREE_PUBLIC (decl
))
8259 add_AT_flag (subr_die
, DW_AT_external
, 1);
8261 add_name_and_src_coords_attributes (subr_die
, decl
);
8262 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8264 register tree type
= TREE_TYPE (decl
);
8266 add_prototyped_attribute (subr_die
, type
);
8267 add_type_attribute (subr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8270 add_pure_or_virtual_attribute (subr_die
, decl
);
8271 if (DECL_ARTIFICIAL (decl
))
8272 add_AT_flag (subr_die
, DW_AT_artificial
, 1);
8273 if (TREE_PROTECTED (decl
))
8274 add_AT_unsigned (subr_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8275 else if (TREE_PRIVATE (decl
))
8276 add_AT_unsigned (subr_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8281 add_AT_flag (subr_die
, DW_AT_declaration
, 1);
8283 /* The first time we see a member function, it is in the context of
8284 the class to which it belongs. We make sure of this by emitting
8285 the class first. The next time is the definition, which is
8286 handled above. The two may come from the same source text. */
8287 if (DECL_CONTEXT (decl
))
8288 equate_decl_number_to_die (decl
, subr_die
);
8290 else if (DECL_ABSTRACT (decl
))
8292 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8293 but not for extern inline functions. We can't get this completely
8294 correct because information about whether the function was declared
8295 inline is not saved anywhere. */
8296 if (DECL_DEFER_OUTPUT (decl
))
8298 if (DECL_INLINE (decl
))
8299 add_AT_unsigned (subr_die
, DW_AT_inline
, DW_INL_declared_inlined
);
8301 add_AT_unsigned (subr_die
, DW_AT_inline
,
8302 DW_INL_declared_not_inlined
);
8304 else if (DECL_INLINE (decl
))
8305 add_AT_unsigned (subr_die
, DW_AT_inline
, DW_INL_inlined
);
8309 equate_decl_number_to_die (decl
, subr_die
);
8311 else if (!DECL_EXTERNAL (decl
))
8313 if (origin
== NULL_TREE
)
8314 equate_decl_number_to_die (decl
, subr_die
);
8316 ASM_GENERATE_INTERNAL_LABEL (label_id
, FUNC_BEGIN_LABEL
,
8317 current_funcdef_number
);
8318 add_AT_lbl_id (subr_die
, DW_AT_low_pc
, label_id
);
8319 ASM_GENERATE_INTERNAL_LABEL (label_id
, FUNC_END_LABEL
,
8320 current_funcdef_number
);
8321 add_AT_lbl_id (subr_die
, DW_AT_high_pc
, label_id
);
8323 add_pubname (decl
, subr_die
);
8324 add_arange (decl
, subr_die
);
8326 #ifdef MIPS_DEBUGGING_INFO
8327 /* Add a reference to the FDE for this routine. */
8328 add_AT_fde_ref (subr_die
, DW_AT_MIPS_fde
, current_funcdef_fde
);
8331 /* Define the "frame base" location for this routine. We use the
8332 frame pointer or stack pointer registers, since the RTL for local
8333 variables is relative to one of them. */
8335 = frame_pointer_needed
? hard_frame_pointer_rtx
: stack_pointer_rtx
;
8336 add_AT_loc (subr_die
, DW_AT_frame_base
, reg_loc_descriptor (fp_reg
));
8339 /* ??? This fails for nested inline functions, because context_display
8340 is not part of the state saved/restored for inline functions. */
8341 if (current_function_needs_context
)
8342 add_AT_location_description (subr_die
, DW_AT_static_link
,
8343 lookup_static_chain (decl
));
8347 /* Now output descriptions of the arguments for this function. This gets
8348 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8349 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8350 `...' at the end of the formal parameter list. In order to find out if
8351 there was a trailing ellipsis or not, we must instead look at the type
8352 associated with the FUNCTION_DECL. This will be a node of type
8353 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8354 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8355 an ellipsis at the end. */
8356 push_decl_scope (decl
);
8358 /* In the case where we are describing a mere function declaration, all we
8359 need to do here (and all we *can* do here) is to describe the *types* of
8360 its formal parameters. */
8361 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
8363 else if (declaration
)
8364 gen_formal_types_die (TREE_TYPE (decl
), subr_die
);
8367 /* Generate DIEs to represent all known formal parameters */
8368 register tree arg_decls
= DECL_ARGUMENTS (decl
);
8371 /* When generating DIEs, generate the unspecified_parameters DIE
8372 instead if we come across the arg "__builtin_va_alist" */
8373 for (parm
= arg_decls
; parm
; parm
= TREE_CHAIN (parm
))
8374 if (TREE_CODE (parm
) == PARM_DECL
)
8376 if (DECL_NAME (parm
)
8377 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm
)),
8378 "__builtin_va_alist"))
8379 gen_unspecified_parameters_die (parm
, subr_die
);
8381 gen_decl_die (parm
, subr_die
);
8384 /* Decide whether we need a unspecified_parameters DIE at the end.
8385 There are 2 more cases to do this for: 1) the ansi ... declaration -
8386 this is detectable when the end of the arg list is not a
8387 void_type_node 2) an unprototyped function declaration (not a
8388 definition). This just means that we have no info about the
8389 parameters at all. */
8390 fn_arg_types
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8391 if (fn_arg_types
!= NULL
)
8393 /* this is the prototyped case, check for ... */
8394 if (TREE_VALUE (tree_last (fn_arg_types
)) != void_type_node
)
8395 gen_unspecified_parameters_die (decl
, subr_die
);
8397 else if (DECL_INITIAL (decl
) == NULL_TREE
)
8398 gen_unspecified_parameters_die (decl
, subr_die
);
8401 /* Output Dwarf info for all of the stuff within the body of the function
8402 (if it has one - it may be just a declaration). */
8403 outer_scope
= DECL_INITIAL (decl
);
8405 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8406 node created to represent a function. This outermost BLOCK actually
8407 represents the outermost binding contour for the function, i.e. the
8408 contour in which the function's formal parameters and labels get
8409 declared. Curiously, it appears that the front end doesn't actually
8410 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8411 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8412 list for the function instead.) The BLOCK_VARS list for the
8413 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8414 the function however, and we output DWARF info for those in
8415 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8416 node representing the function's outermost pair of curly braces, and
8417 any blocks used for the base and member initializers of a C++
8418 constructor function. */
8419 if (! declaration
&& TREE_CODE (outer_scope
) != ERROR_MARK
)
8421 current_function_has_inlines
= 0;
8422 decls_for_scope (outer_scope
, subr_die
, 0);
8424 #if 0 && defined (MIPS_DEBUGGING_INFO)
8425 if (current_function_has_inlines
)
8427 add_AT_flag (subr_die
, DW_AT_MIPS_has_inlines
, 1);
8428 if (! comp_unit_has_inlines
)
8430 add_AT_flag (comp_unit_die
, DW_AT_MIPS_has_inlines
, 1);
8431 comp_unit_has_inlines
= 1;
8440 /* Generate a DIE to represent a declared data object. */
8443 gen_variable_die (decl
, context_die
)
8445 register dw_die_ref context_die
;
8447 register tree origin
= decl_ultimate_origin (decl
);
8448 register dw_die_ref var_die
= new_die (DW_TAG_variable
, context_die
);
8450 dw_die_ref old_die
= lookup_decl_die (decl
);
8452 = (DECL_EXTERNAL (decl
)
8453 || current_function_decl
!= decl_function_context (decl
)
8454 || context_die
->die_tag
== DW_TAG_structure_type
8455 || context_die
->die_tag
== DW_TAG_union_type
);
8458 add_abstract_origin_attribute (var_die
, origin
);
8459 /* Loop unrolling can create multiple blocks that refer to the same
8460 static variable, so we must test for the DW_AT_declaration flag. */
8461 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8462 copy decls and set the DECL_ABSTRACT flag on them instead of
8464 else if (old_die
&& TREE_STATIC (decl
)
8465 && get_AT_flag (old_die
, DW_AT_declaration
) == 1)
8467 /* ??? This is an instantiation of a C++ class level static. */
8468 add_AT_die_ref (var_die
, DW_AT_specification
, old_die
);
8469 if (DECL_NAME (decl
))
8471 register unsigned file_index
8472 = lookup_filename (DECL_SOURCE_FILE (decl
));
8474 if (get_AT_unsigned (old_die
, DW_AT_decl_file
) != file_index
)
8475 add_AT_unsigned (var_die
, DW_AT_decl_file
, file_index
);
8477 if (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8478 != DECL_SOURCE_LINE (decl
))
8480 add_AT_unsigned (var_die
, DW_AT_decl_line
,
8481 DECL_SOURCE_LINE (decl
));
8486 add_name_and_src_coords_attributes (var_die
, decl
);
8487 add_type_attribute (var_die
, TREE_TYPE (decl
),
8488 TREE_READONLY (decl
),
8489 TREE_THIS_VOLATILE (decl
), context_die
);
8491 if (TREE_PUBLIC (decl
))
8492 add_AT_flag (var_die
, DW_AT_external
, 1);
8494 if (DECL_ARTIFICIAL (decl
))
8495 add_AT_flag (var_die
, DW_AT_artificial
, 1);
8497 if (TREE_PROTECTED (decl
))
8498 add_AT_unsigned (var_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8500 else if (TREE_PRIVATE (decl
))
8501 add_AT_unsigned (var_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8505 add_AT_flag (var_die
, DW_AT_declaration
, 1);
8507 if ((declaration
&& decl_class_context (decl
)) || DECL_ABSTRACT (decl
))
8508 equate_decl_number_to_die (decl
, var_die
);
8510 if (! declaration
&& ! DECL_ABSTRACT (decl
))
8512 equate_decl_number_to_die (decl
, var_die
);
8513 add_location_or_const_value_attribute (var_die
, decl
);
8514 add_pubname (decl
, var_die
);
8518 /* Generate a DIE to represent a label identifier. */
8521 gen_label_die (decl
, context_die
)
8523 register dw_die_ref context_die
;
8525 register tree origin
= decl_ultimate_origin (decl
);
8526 register dw_die_ref lbl_die
= new_die (DW_TAG_label
, context_die
);
8528 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8529 char label2
[MAX_ARTIFICIAL_LABEL_BYTES
];
8532 add_abstract_origin_attribute (lbl_die
, origin
);
8534 add_name_and_src_coords_attributes (lbl_die
, decl
);
8536 if (DECL_ABSTRACT (decl
))
8537 equate_decl_number_to_die (decl
, lbl_die
);
8540 insn
= DECL_RTL (decl
);
8541 if (GET_CODE (insn
) == CODE_LABEL
)
8543 /* When optimization is enabled (via -O) some parts of the compiler
8544 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8545 represent source-level labels which were explicitly declared by
8546 the user. This really shouldn't be happening though, so catch
8547 it if it ever does happen. */
8548 if (INSN_DELETED_P (insn
))
8551 sprintf (label2
, INSN_LABEL_FMT
, current_funcdef_number
);
8552 ASM_GENERATE_INTERNAL_LABEL (label
, label2
,
8553 (unsigned) INSN_UID (insn
));
8554 add_AT_lbl_id (lbl_die
, DW_AT_low_pc
, label
);
8559 /* Generate a DIE for a lexical block. */
8562 gen_lexical_block_die (stmt
, context_die
, depth
)
8564 register dw_die_ref context_die
;
8567 register dw_die_ref stmt_die
= new_die (DW_TAG_lexical_block
, context_die
);
8568 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8570 if (! BLOCK_ABSTRACT (stmt
))
8572 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_BEGIN_LABEL
,
8574 add_AT_lbl_id (stmt_die
, DW_AT_low_pc
, label
);
8575 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_END_LABEL
, next_block_number
);
8576 add_AT_lbl_id (stmt_die
, DW_AT_high_pc
, label
);
8579 push_decl_scope (stmt
);
8580 decls_for_scope (stmt
, stmt_die
, depth
);
8584 /* Generate a DIE for an inlined subprogram. */
8587 gen_inlined_subroutine_die (stmt
, context_die
, depth
)
8589 register dw_die_ref context_die
;
8592 if (! BLOCK_ABSTRACT (stmt
))
8594 register dw_die_ref subr_die
8595 = new_die (DW_TAG_inlined_subroutine
, context_die
);
8596 register tree decl
= block_ultimate_origin (stmt
);
8597 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8599 add_abstract_origin_attribute (subr_die
, decl
);
8600 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_BEGIN_LABEL
,
8602 add_AT_lbl_id (subr_die
, DW_AT_low_pc
, label
);
8603 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_END_LABEL
, next_block_number
);
8604 add_AT_lbl_id (subr_die
, DW_AT_high_pc
, label
);
8605 push_decl_scope (decl
);
8606 decls_for_scope (stmt
, subr_die
, depth
);
8608 current_function_has_inlines
= 1;
8612 /* Generate a DIE for a field in a record, or structure. */
8615 gen_field_die (decl
, context_die
)
8617 register dw_die_ref context_die
;
8619 register dw_die_ref decl_die
= new_die (DW_TAG_member
, context_die
);
8621 add_name_and_src_coords_attributes (decl_die
, decl
);
8622 add_type_attribute (decl_die
, member_declared_type (decl
),
8623 TREE_READONLY (decl
), TREE_THIS_VOLATILE (decl
),
8626 /* If this is a bit field... */
8627 if (DECL_BIT_FIELD_TYPE (decl
))
8629 add_byte_size_attribute (decl_die
, decl
);
8630 add_bit_size_attribute (decl_die
, decl
);
8631 add_bit_offset_attribute (decl_die
, decl
);
8634 if (TREE_CODE (DECL_FIELD_CONTEXT (decl
)) != UNION_TYPE
)
8635 add_data_member_location_attribute (decl_die
, decl
);
8637 if (DECL_ARTIFICIAL (decl
))
8638 add_AT_flag (decl_die
, DW_AT_artificial
, 1);
8640 if (TREE_PROTECTED (decl
))
8641 add_AT_unsigned (decl_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8643 else if (TREE_PRIVATE (decl
))
8644 add_AT_unsigned (decl_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8648 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8649 Use modified_type_die instead.
8650 We keep this code here just in case these types of DIEs may be needed to
8651 represent certain things in other languages (e.g. Pascal) someday. */
8653 gen_pointer_type_die (type
, context_die
)
8655 register dw_die_ref context_die
;
8657 register dw_die_ref ptr_die
8658 = new_die (DW_TAG_pointer_type
, scope_die_for (type
, context_die
));
8660 equate_type_number_to_die (type
, ptr_die
);
8661 add_type_attribute (ptr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8662 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
8665 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8666 Use modified_type_die instead.
8667 We keep this code here just in case these types of DIEs may be needed to
8668 represent certain things in other languages (e.g. Pascal) someday. */
8670 gen_reference_type_die (type
, context_die
)
8672 register dw_die_ref context_die
;
8674 register dw_die_ref ref_die
8675 = new_die (DW_TAG_reference_type
, scope_die_for (type
, context_die
));
8677 equate_type_number_to_die (type
, ref_die
);
8678 add_type_attribute (ref_die
, TREE_TYPE (type
), 0, 0, context_die
);
8679 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
8683 /* Generate a DIE for a pointer to a member type. */
8685 gen_ptr_to_mbr_type_die (type
, context_die
)
8687 register dw_die_ref context_die
;
8689 register dw_die_ref ptr_die
8690 = new_die (DW_TAG_ptr_to_member_type
, scope_die_for (type
, context_die
));
8692 equate_type_number_to_die (type
, ptr_die
);
8693 add_AT_die_ref (ptr_die
, DW_AT_containing_type
,
8694 lookup_type_die (TYPE_OFFSET_BASETYPE (type
)));
8695 add_type_attribute (ptr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8698 /* Generate the DIE for the compilation unit. */
8701 gen_compile_unit_die (main_input_filename
)
8702 register char *main_input_filename
;
8705 char *wd
= getpwd ();
8707 comp_unit_die
= new_die (DW_TAG_compile_unit
, NULL
);
8708 add_name_attribute (comp_unit_die
, main_input_filename
);
8711 add_AT_string (comp_unit_die
, DW_AT_comp_dir
, wd
);
8713 sprintf (producer
, "%s %s", language_string
, version_string
);
8715 #ifdef MIPS_DEBUGGING_INFO
8716 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8717 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8718 not appear in the producer string, the debugger reaches the conclusion
8719 that the object file is stripped and has no debugging information.
8720 To get the MIPS/SGI debugger to believe that there is debugging
8721 information in the object file, we add a -g to the producer string. */
8722 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8723 strcat (producer
, " -g");
8726 add_AT_string (comp_unit_die
, DW_AT_producer
, producer
);
8728 if (strcmp (language_string
, "GNU C++") == 0)
8729 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C_plus_plus
);
8731 else if (strcmp (language_string
, "GNU Ada") == 0)
8732 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Ada83
);
8734 else if (strcmp (language_string
, "GNU F77") == 0)
8735 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Fortran77
);
8737 else if (strcmp (language_string
, "GNU Pascal") == 0)
8738 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Pascal83
);
8740 else if (flag_traditional
)
8741 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C
);
8744 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C89
);
8746 #if 0 /* unimplemented */
8747 if (debug_info_level
>= DINFO_LEVEL_VERBOSE
)
8748 add_AT_unsigned (comp_unit_die
, DW_AT_macro_info
, 0);
8752 /* Generate a DIE for a string type. */
8755 gen_string_type_die (type
, context_die
)
8757 register dw_die_ref context_die
;
8759 register dw_die_ref type_die
8760 = new_die (DW_TAG_string_type
, scope_die_for (type
, context_die
));
8762 equate_type_number_to_die (type
, type_die
);
8764 /* Fudge the string length attribute for now. */
8766 /* TODO: add string length info.
8767 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8768 bound_representation (upper_bound, 0, 'u'); */
8771 /* Generate the DIE for a base class. */
8774 gen_inheritance_die (binfo
, context_die
)
8775 register tree binfo
;
8776 register dw_die_ref context_die
;
8778 dw_die_ref die
= new_die (DW_TAG_inheritance
, context_die
);
8780 add_type_attribute (die
, BINFO_TYPE (binfo
), 0, 0, context_die
);
8781 add_data_member_location_attribute (die
, binfo
);
8783 if (TREE_VIA_VIRTUAL (binfo
))
8784 add_AT_unsigned (die
, DW_AT_virtuality
, DW_VIRTUALITY_virtual
);
8785 if (TREE_VIA_PUBLIC (binfo
))
8786 add_AT_unsigned (die
, DW_AT_accessibility
, DW_ACCESS_public
);
8787 else if (TREE_VIA_PROTECTED (binfo
))
8788 add_AT_unsigned (die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8791 /* Generate a DIE for a class member. */
8794 gen_member_die (type
, context_die
)
8796 register dw_die_ref context_die
;
8798 register tree member
;
8800 /* If this is not an incomplete type, output descriptions of each of its
8801 members. Note that as we output the DIEs necessary to represent the
8802 members of this record or union type, we will also be trying to output
8803 DIEs to represent the *types* of those members. However the `type'
8804 function (above) will specifically avoid generating type DIEs for member
8805 types *within* the list of member DIEs for this (containing) type execpt
8806 for those types (of members) which are explicitly marked as also being
8807 members of this (containing) type themselves. The g++ front- end can
8808 force any given type to be treated as a member of some other
8809 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8810 to point to the TREE node representing the appropriate (containing)
8813 /* First output info about the base classes. */
8814 if (TYPE_BINFO (type
) && TYPE_BINFO_BASETYPES (type
))
8816 register tree bases
= TYPE_BINFO_BASETYPES (type
);
8817 register int n_bases
= TREE_VEC_LENGTH (bases
);
8820 for (i
= 0; i
< n_bases
; i
++)
8821 gen_inheritance_die (TREE_VEC_ELT (bases
, i
), context_die
);
8824 /* Now output info about the data members and type members. */
8825 for (member
= TYPE_FIELDS (type
); member
; member
= TREE_CHAIN (member
))
8826 gen_decl_die (member
, context_die
);
8828 /* Now output info about the function members (if any). */
8829 for (member
= TYPE_METHODS (type
); member
; member
= TREE_CHAIN (member
))
8830 gen_decl_die (member
, context_die
);
8833 /* Generate a DIE for a structure or union type. */
8836 gen_struct_or_union_type_die (type
, context_die
)
8838 register dw_die_ref context_die
;
8840 register dw_die_ref type_die
= lookup_type_die (type
);
8841 register dw_die_ref scope_die
= 0;
8842 register int nested
= 0;
8844 if (type_die
&& ! TYPE_SIZE (type
))
8847 if (TYPE_CONTEXT (type
) != NULL_TREE
8848 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type
)))
8851 scope_die
= scope_die_for (type
, context_die
);
8853 if (! type_die
|| (nested
&& scope_die
== comp_unit_die
))
8854 /* First occurrence of type or toplevel definition of nested class. */
8856 register dw_die_ref old_die
= type_die
;
8858 type_die
= new_die (TREE_CODE (type
) == RECORD_TYPE
8859 ? DW_TAG_structure_type
: DW_TAG_union_type
,
8861 equate_type_number_to_die (type
, type_die
);
8862 add_name_attribute (type_die
, type_tag (type
));
8864 add_AT_die_ref (type_die
, DW_AT_specification
, old_die
);
8867 remove_AT (type_die
, DW_AT_declaration
);
8869 /* If we're not in the right context to be defining this type, defer to
8870 avoid tricky recursion. */
8871 if (TYPE_SIZE (type
) && decl_scope_depth
> 0 && scope_die
== comp_unit_die
)
8873 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8876 /* If this type has been completed, then give it a byte_size attribute and
8877 then give a list of members. */
8878 else if (TYPE_SIZE (type
))
8880 /* Prevent infinite recursion in cases where the type of some member of
8881 this type is expressed in terms of this type itself. */
8882 TREE_ASM_WRITTEN (type
) = 1;
8883 add_byte_size_attribute (type_die
, type
);
8884 if (TYPE_STUB_DECL (type
) != NULL_TREE
)
8885 add_src_coords_attributes (type_die
, TYPE_STUB_DECL (type
));
8887 /* If the first reference to this type was as the return type of an
8888 inline function, then it may not have a parent. Fix this now. */
8889 if (type_die
->die_parent
== NULL
)
8890 add_child_die (scope_die
, type_die
);
8892 push_decl_scope (type
);
8893 gen_member_die (type
, type_die
);
8896 /* GNU extension: Record what type our vtable lives in. */
8897 if (TYPE_VFIELD (type
))
8899 tree vtype
= DECL_FCONTEXT (TYPE_VFIELD (type
));
8901 gen_type_die (vtype
, context_die
);
8902 add_AT_die_ref (type_die
, DW_AT_containing_type
,
8903 lookup_type_die (vtype
));
8907 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8910 /* Generate a DIE for a subroutine _type_. */
8913 gen_subroutine_type_die (type
, context_die
)
8915 register dw_die_ref context_die
;
8917 register tree return_type
= TREE_TYPE (type
);
8918 register dw_die_ref subr_die
8919 = new_die (DW_TAG_subroutine_type
, scope_die_for (type
, context_die
));
8921 equate_type_number_to_die (type
, subr_die
);
8922 add_prototyped_attribute (subr_die
, type
);
8923 add_type_attribute (subr_die
, return_type
, 0, 0, context_die
);
8924 gen_formal_types_die (type
, subr_die
);
8927 /* Generate a DIE for a type definition */
8930 gen_typedef_die (decl
, context_die
)
8932 register dw_die_ref context_die
;
8934 register dw_die_ref type_die
;
8935 register tree origin
;
8937 if (TREE_ASM_WRITTEN (decl
))
8939 TREE_ASM_WRITTEN (decl
) = 1;
8941 type_die
= new_die (DW_TAG_typedef
, scope_die_for (decl
, context_die
));
8942 origin
= decl_ultimate_origin (decl
);
8944 add_abstract_origin_attribute (type_die
, origin
);
8948 add_name_and_src_coords_attributes (type_die
, decl
);
8949 if (DECL_ORIGINAL_TYPE (decl
))
8951 type
= DECL_ORIGINAL_TYPE (decl
);
8952 equate_type_number_to_die (TREE_TYPE (decl
), type_die
);
8955 type
= TREE_TYPE (decl
);
8956 add_type_attribute (type_die
, type
, TREE_READONLY (decl
),
8957 TREE_THIS_VOLATILE (decl
), context_die
);
8960 if (DECL_ABSTRACT (decl
))
8961 equate_decl_number_to_die (decl
, type_die
);
8964 /* Generate a type description DIE. */
8967 gen_type_die (type
, context_die
)
8969 register dw_die_ref context_die
;
8971 if (type
== NULL_TREE
|| type
== error_mark_node
)
8974 /* We are going to output a DIE to represent the unqualified version of
8975 this type (i.e. without any const or volatile qualifiers) so get the
8976 main variant (i.e. the unqualified version) of this type now. */
8977 type
= type_main_variant (type
);
8979 if (TREE_ASM_WRITTEN (type
))
8982 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8983 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
8985 TREE_ASM_WRITTEN (type
) = 1;
8986 gen_decl_die (TYPE_NAME (type
), context_die
);
8990 switch (TREE_CODE (type
))
8996 case REFERENCE_TYPE
:
8997 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8998 ensures that the gen_type_die recursion will terminate even if the
8999 type is recursive. Recursive types are possible in Ada. */
9000 /* ??? We could perhaps do this for all types before the switch
9002 TREE_ASM_WRITTEN (type
) = 1;
9004 /* For these types, all that is required is that we output a DIE (or a
9005 set of DIEs) to represent the "basis" type. */
9006 gen_type_die (TREE_TYPE (type
), context_die
);
9010 /* This code is used for C++ pointer-to-data-member types.
9011 Output a description of the relevant class type. */
9012 gen_type_die (TYPE_OFFSET_BASETYPE (type
), context_die
);
9014 /* Output a description of the type of the object pointed to. */
9015 gen_type_die (TREE_TYPE (type
), context_die
);
9017 /* Now output a DIE to represent this pointer-to-data-member type
9019 gen_ptr_to_mbr_type_die (type
, context_die
);
9023 gen_type_die (TYPE_DOMAIN (type
), context_die
);
9024 gen_set_type_die (type
, context_die
);
9028 gen_type_die (TREE_TYPE (type
), context_die
);
9029 abort (); /* No way to represent these in Dwarf yet! */
9033 /* Force out return type (in case it wasn't forced out already). */
9034 gen_type_die (TREE_TYPE (type
), context_die
);
9035 gen_subroutine_type_die (type
, context_die
);
9039 /* Force out return type (in case it wasn't forced out already). */
9040 gen_type_die (TREE_TYPE (type
), context_die
);
9041 gen_subroutine_type_die (type
, context_die
);
9045 if (TYPE_STRING_FLAG (type
) && TREE_CODE (TREE_TYPE (type
)) == CHAR_TYPE
)
9047 gen_type_die (TREE_TYPE (type
), context_die
);
9048 gen_string_type_die (type
, context_die
);
9051 gen_array_type_die (type
, context_die
);
9057 case QUAL_UNION_TYPE
:
9058 /* If this is a nested type whose containing class hasn't been
9059 written out yet, writing it out will cover this one, too. */
9060 if (TYPE_CONTEXT (type
)
9061 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type
))
9062 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9064 gen_type_die (TYPE_CONTEXT (type
), context_die
);
9066 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9069 /* If that failed, attach ourselves to the stub. */
9070 push_decl_scope (TYPE_CONTEXT (type
));
9071 context_die
= lookup_type_die (TYPE_CONTEXT (type
));
9074 if (TREE_CODE (type
) == ENUMERAL_TYPE
)
9075 gen_enumeration_type_die (type
, context_die
);
9077 gen_struct_or_union_type_die (type
, context_die
);
9079 if (TYPE_CONTEXT (type
)
9080 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type
))
9081 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9084 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9085 it up if it is ever completed. gen_*_type_die will set it for us
9086 when appropriate. */
9095 /* No DIEs needed for fundamental types. */
9099 /* No Dwarf representation currently defined. */
9106 TREE_ASM_WRITTEN (type
) = 1;
9109 /* Generate a DIE for a tagged type instantiation. */
9112 gen_tagged_type_instantiation_die (type
, context_die
)
9114 register dw_die_ref context_die
;
9116 if (type
== NULL_TREE
|| type
== error_mark_node
)
9119 /* We are going to output a DIE to represent the unqualified version of
9120 this type (i.e. without any const or volatile qualifiers) so make sure
9121 that we have the main variant (i.e. the unqualified version) of this
9123 if (type
!= type_main_variant (type
)
9124 || !TREE_ASM_WRITTEN (type
))
9127 switch (TREE_CODE (type
))
9133 gen_inlined_enumeration_type_die (type
, context_die
);
9137 gen_inlined_structure_type_die (type
, context_die
);
9141 case QUAL_UNION_TYPE
:
9142 gen_inlined_union_type_die (type
, context_die
);
9150 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9151 things which are local to the given block. */
9154 gen_block_die (stmt
, context_die
, depth
)
9156 register dw_die_ref context_die
;
9159 register int must_output_die
= 0;
9160 register tree origin
;
9162 register enum tree_code origin_code
;
9164 /* Ignore blocks never really used to make RTL. */
9166 if (stmt
== NULL_TREE
|| !TREE_USED (stmt
))
9169 /* Determine the "ultimate origin" of this block. This block may be an
9170 inlined instance of an inlined instance of inline function, so we have
9171 to trace all of the way back through the origin chain to find out what
9172 sort of node actually served as the original seed for the creation of
9173 the current block. */
9174 origin
= block_ultimate_origin (stmt
);
9175 origin_code
= (origin
!= NULL
) ? TREE_CODE (origin
) : ERROR_MARK
;
9177 /* Determine if we need to output any Dwarf DIEs at all to represent this
9179 if (origin_code
== FUNCTION_DECL
)
9180 /* The outer scopes for inlinings *must* always be represented. We
9181 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9182 must_output_die
= 1;
9185 /* In the case where the current block represents an inlining of the
9186 "body block" of an inline function, we must *NOT* output any DIE for
9187 this block because we have already output a DIE to represent the
9188 whole inlined function scope and the "body block" of any function
9189 doesn't really represent a different scope according to ANSI C
9190 rules. So we check here to make sure that this block does not
9191 represent a "body block inlining" before trying to set the
9192 `must_output_die' flag. */
9193 if (! is_body_block (origin
? origin
: stmt
))
9195 /* Determine if this block directly contains any "significant"
9196 local declarations which we will need to output DIEs for. */
9197 if (debug_info_level
> DINFO_LEVEL_TERSE
)
9198 /* We are not in terse mode so *any* local declaration counts
9199 as being a "significant" one. */
9200 must_output_die
= (BLOCK_VARS (stmt
) != NULL
);
9202 /* We are in terse mode, so only local (nested) function
9203 definitions count as "significant" local declarations. */
9204 for (decl
= BLOCK_VARS (stmt
);
9205 decl
!= NULL
; decl
= TREE_CHAIN (decl
))
9206 if (TREE_CODE (decl
) == FUNCTION_DECL
9207 && DECL_INITIAL (decl
))
9209 must_output_die
= 1;
9215 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9216 DIE for any block which contains no significant local declarations at
9217 all. Rather, in such cases we just call `decls_for_scope' so that any
9218 needed Dwarf info for any sub-blocks will get properly generated. Note
9219 that in terse mode, our definition of what constitutes a "significant"
9220 local declaration gets restricted to include only inlined function
9221 instances and local (nested) function definitions. */
9222 if (must_output_die
)
9224 if (origin_code
== FUNCTION_DECL
)
9225 gen_inlined_subroutine_die (stmt
, context_die
, depth
);
9227 gen_lexical_block_die (stmt
, context_die
, depth
);
9230 decls_for_scope (stmt
, context_die
, depth
);
9233 /* Generate all of the decls declared within a given scope and (recursively)
9234 all of its sub-blocks. */
9237 decls_for_scope (stmt
, context_die
, depth
)
9239 register dw_die_ref context_die
;
9243 register tree subblocks
;
9245 /* Ignore blocks never really used to make RTL. */
9246 if (stmt
== NULL_TREE
|| ! TREE_USED (stmt
))
9249 if (!BLOCK_ABSTRACT (stmt
) && depth
> 0)
9250 next_block_number
++;
9252 /* Output the DIEs to represent all of the data objects and typedefs
9253 declared directly within this block but not within any nested
9254 sub-blocks. Also, nested function and tag DIEs have been
9255 generated with a parent of NULL; fix that up now. */
9256 for (decl
= BLOCK_VARS (stmt
);
9257 decl
!= NULL
; decl
= TREE_CHAIN (decl
))
9259 register dw_die_ref die
;
9261 if (TREE_CODE (decl
) == FUNCTION_DECL
)
9262 die
= lookup_decl_die (decl
);
9263 else if (TREE_CODE (decl
) == TYPE_DECL
&& TYPE_DECL_IS_STUB (decl
))
9264 die
= lookup_type_die (TREE_TYPE (decl
));
9268 if (die
!= NULL
&& die
->die_parent
== NULL
)
9269 add_child_die (context_die
, die
);
9271 gen_decl_die (decl
, context_die
);
9274 /* Output the DIEs to represent all sub-blocks (and the items declared
9275 therein) of this block. */
9276 for (subblocks
= BLOCK_SUBBLOCKS (stmt
);
9278 subblocks
= BLOCK_CHAIN (subblocks
))
9279 gen_block_die (subblocks
, context_die
, depth
+ 1);
9282 /* Is this a typedef we can avoid emitting? */
9285 is_redundant_typedef (decl
)
9288 if (TYPE_DECL_IS_STUB (decl
))
9291 if (DECL_ARTIFICIAL (decl
)
9292 && DECL_CONTEXT (decl
)
9293 && is_tagged_type (DECL_CONTEXT (decl
))
9294 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl
))) == TYPE_DECL
9295 && DECL_NAME (decl
) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl
))))
9296 /* Also ignore the artificial member typedef for the class name. */
9302 /* Generate Dwarf debug information for a decl described by DECL. */
9305 gen_decl_die (decl
, context_die
)
9307 register dw_die_ref context_die
;
9309 register tree origin
;
9311 /* Make a note of the decl node we are going to be working on. We may need
9312 to give the user the source coordinates of where it appeared in case we
9313 notice (later on) that something about it looks screwy. */
9314 dwarf_last_decl
= decl
;
9316 if (TREE_CODE (decl
) == ERROR_MARK
)
9319 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9320 ignore a function definition, since that would screw up our count of
9321 blocks, and that in turn will completely screw up the labels we will
9322 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9323 subsequent blocks). */
9324 if (DECL_IGNORED_P (decl
) && TREE_CODE (decl
) != FUNCTION_DECL
)
9327 switch (TREE_CODE (decl
))
9330 /* The individual enumerators of an enum type get output when we output
9331 the Dwarf representation of the relevant enum type itself. */
9335 /* Don't output any DIEs to represent mere function declarations,
9336 unless they are class members or explicit block externs. */
9337 if (DECL_INITIAL (decl
) == NULL_TREE
&& DECL_CONTEXT (decl
) == NULL_TREE
9338 && (current_function_decl
== NULL_TREE
|| ! DECL_ARTIFICIAL (decl
)))
9341 if (debug_info_level
> DINFO_LEVEL_TERSE
)
9343 /* Before we describe the FUNCTION_DECL itself, make sure that we
9344 have described its return type. */
9345 gen_type_die (TREE_TYPE (TREE_TYPE (decl
)), context_die
);
9347 /* And its containing type. */
9348 origin
= decl_class_context (decl
);
9349 if (origin
!= NULL_TREE
)
9350 gen_type_die (origin
, context_die
);
9352 /* And its virtual context. */
9353 if (DECL_VINDEX (decl
) != NULL_TREE
)
9354 gen_type_die (DECL_CONTEXT (decl
), context_die
);
9357 /* Now output a DIE to represent the function itself. */
9358 gen_subprogram_die (decl
, context_die
);
9362 /* If we are in terse mode, don't generate any DIEs to represent any
9364 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9367 /* In the special case of a TYPE_DECL node representing the
9368 declaration of some type tag, if the given TYPE_DECL is marked as
9369 having been instantiated from some other (original) TYPE_DECL node
9370 (e.g. one which was generated within the original definition of an
9371 inline function) we have to generate a special (abbreviated)
9372 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9374 if (TYPE_DECL_IS_STUB (decl
) && DECL_ABSTRACT_ORIGIN (decl
) != NULL_TREE
)
9376 gen_tagged_type_instantiation_die (TREE_TYPE (decl
), context_die
);
9380 if (is_redundant_typedef (decl
))
9381 gen_type_die (TREE_TYPE (decl
), context_die
);
9383 /* Output a DIE to represent the typedef itself. */
9384 gen_typedef_die (decl
, context_die
);
9388 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9389 gen_label_die (decl
, context_die
);
9393 /* If we are in terse mode, don't generate any DIEs to represent any
9394 variable declarations or definitions. */
9395 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9398 /* Output any DIEs that are needed to specify the type of this data
9400 gen_type_die (TREE_TYPE (decl
), context_die
);
9402 /* And its containing type. */
9403 origin
= decl_class_context (decl
);
9404 if (origin
!= NULL_TREE
)
9405 gen_type_die (origin
, context_die
);
9407 /* Now output the DIE to represent the data object itself. This gets
9408 complicated because of the possibility that the VAR_DECL really
9409 represents an inlined instance of a formal parameter for an inline
9411 origin
= decl_ultimate_origin (decl
);
9412 if (origin
!= NULL_TREE
&& TREE_CODE (origin
) == PARM_DECL
)
9413 gen_formal_parameter_die (decl
, context_die
);
9415 gen_variable_die (decl
, context_die
);
9419 /* Ignore the nameless fields that are used to skip bits, but
9420 handle C++ anonymous unions. */
9421 if (DECL_NAME (decl
) != NULL_TREE
9422 || TREE_CODE (TREE_TYPE (decl
)) == UNION_TYPE
)
9424 gen_type_die (member_declared_type (decl
), context_die
);
9425 gen_field_die (decl
, context_die
);
9430 gen_type_die (TREE_TYPE (decl
), context_die
);
9431 gen_formal_parameter_die (decl
, context_die
);
9439 /* Write the debugging output for DECL. */
9442 dwarf2out_decl (decl
)
9445 register dw_die_ref context_die
= comp_unit_die
;
9447 if (TREE_CODE (decl
) == ERROR_MARK
)
9450 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9451 hope that the node in question doesn't represent a function definition.
9452 If it does, then totally ignoring it is bound to screw up our count of
9453 blocks, and that in turn will completely screw up the labels we will
9454 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9455 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9456 own sequence numbers with them!) */
9457 if (DECL_IGNORED_P (decl
))
9459 if (TREE_CODE (decl
) == FUNCTION_DECL
9460 && DECL_INITIAL (decl
) != NULL
)
9466 switch (TREE_CODE (decl
))
9469 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9470 builtin function. Explicit programmer-supplied declarations of
9471 these same functions should NOT be ignored however. */
9472 if (DECL_EXTERNAL (decl
) && DECL_FUNCTION_CODE (decl
))
9475 /* What we would really like to do here is to filter out all mere
9476 file-scope declarations of file-scope functions which are never
9477 referenced later within this translation unit (and keep all of ones
9478 that *are* referenced later on) but we aren't clairvoyant, so we have
9479 no idea which functions will be referenced in the future (i.e. later
9480 on within the current translation unit). So here we just ignore all
9481 file-scope function declarations which are not also definitions. If
9482 and when the debugger needs to know something about these functions,
9483 it wil have to hunt around and find the DWARF information associated
9484 with the definition of the function. Note that we can't just check
9485 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9486 definitions and which ones represent mere declarations. We have to
9487 check `DECL_INITIAL' instead. That's because the C front-end
9488 supports some weird semantics for "extern inline" function
9489 definitions. These can get inlined within the current translation
9490 unit (an thus, we need to generate DWARF info for their abstract
9491 instances so that the DWARF info for the concrete inlined instances
9492 can have something to refer to) but the compiler never generates any
9493 out-of-lines instances of such things (despite the fact that they
9494 *are* definitions). The important point is that the C front-end
9495 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9496 to generate DWARF for them anyway. Note that the C++ front-end also
9497 plays some similar games for inline function definitions appearing
9498 within include files which also contain
9499 `#pragma interface' pragmas. */
9500 if (DECL_INITIAL (decl
) == NULL_TREE
)
9503 /* If we're a nested function, initially use a parent of NULL; if we're
9504 a plain function, this will be fixed up in decls_for_scope. If
9505 we're a method, it will be ignored, since we already have a DIE. */
9506 if (decl_function_context (decl
))
9512 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9513 declaration and if the declaration was never even referenced from
9514 within this entire compilation unit. We suppress these DIEs in
9515 order to save space in the .debug section (by eliminating entries
9516 which are probably useless). Note that we must not suppress
9517 block-local extern declarations (whether used or not) because that
9518 would screw-up the debugger's name lookup mechanism and cause it to
9519 miss things which really ought to be in scope at a given point. */
9520 if (DECL_EXTERNAL (decl
) && !TREE_USED (decl
))
9523 /* If we are in terse mode, don't generate any DIEs to represent any
9524 variable declarations or definitions. */
9525 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9530 /* Don't bother trying to generate any DIEs to represent any of the
9531 normal built-in types for the language we are compiling. */
9532 if (DECL_SOURCE_LINE (decl
) == 0)
9534 /* OK, we need to generate one for `bool' so GDB knows what type
9535 comparisons have. */
9536 if ((get_AT_unsigned (comp_unit_die
, DW_AT_language
)
9537 == DW_LANG_C_plus_plus
)
9538 && TREE_CODE (TREE_TYPE (decl
)) == BOOLEAN_TYPE
)
9539 modified_type_die (TREE_TYPE (decl
), 0, 0, NULL
);
9544 /* If we are in terse mode, don't generate any DIEs for types. */
9545 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9548 /* If we're a function-scope tag, initially use a parent of NULL;
9549 this will be fixed up in decls_for_scope. */
9550 if (decl_function_context (decl
))
9559 gen_decl_die (decl
, context_die
);
9560 output_pending_types_for_scope (comp_unit_die
);
9563 /* Output a marker (i.e. a label) for the beginning of the generated code for
9567 dwarf2out_begin_block (blocknum
)
9568 register unsigned blocknum
;
9570 function_section (current_function_decl
);
9571 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BLOCK_BEGIN_LABEL
, blocknum
);
9574 /* Output a marker (i.e. a label) for the end of the generated code for a
9578 dwarf2out_end_block (blocknum
)
9579 register unsigned blocknum
;
9581 function_section (current_function_decl
);
9582 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BLOCK_END_LABEL
, blocknum
);
9585 /* Output a marker (i.e. a label) at a point in the assembly code which
9586 corresponds to a given source level label. */
9589 dwarf2out_label (insn
)
9592 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
9594 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9596 function_section (current_function_decl
);
9597 sprintf (label
, INSN_LABEL_FMT
, current_funcdef_number
);
9598 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, label
,
9599 (unsigned) INSN_UID (insn
));
9603 /* Lookup a filename (in the list of filenames that we know about here in
9604 dwarf2out.c) and return its "index". The index of each (known) filename is
9605 just a unique number which is associated with only that one filename.
9606 We need such numbers for the sake of generating labels
9607 (in the .debug_sfnames section) and references to those
9608 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9609 If the filename given as an argument is not found in our current list,
9610 add it to the list and assign it the next available unique index number.
9611 In order to speed up searches, we remember the index of the filename
9612 was looked up last. This handles the majority of all searches. */
9615 lookup_filename (file_name
)
9618 static unsigned last_file_lookup_index
= 0;
9619 register unsigned i
;
9621 /* Check to see if the file name that was searched on the previous call
9622 matches this file name. If so, return the index. */
9623 if (last_file_lookup_index
!= 0)
9624 if (strcmp (file_name
, file_table
[last_file_lookup_index
]) == 0)
9625 return last_file_lookup_index
;
9627 /* Didn't match the previous lookup, search the table */
9628 for (i
= 1; i
< file_table_in_use
; ++i
)
9629 if (strcmp (file_name
, file_table
[i
]) == 0)
9631 last_file_lookup_index
= i
;
9635 /* Prepare to add a new table entry by making sure there is enough space in
9636 the table to do so. If not, expand the current table. */
9637 if (file_table_in_use
== file_table_allocated
)
9639 file_table_allocated
+= FILE_TABLE_INCREMENT
;
9641 = (char **) xrealloc (file_table
,
9642 file_table_allocated
* sizeof (char *));
9645 /* Add the new entry to the end of the filename table. */
9646 file_table
[file_table_in_use
] = xstrdup (file_name
);
9647 last_file_lookup_index
= file_table_in_use
++;
9649 return last_file_lookup_index
;
9652 /* Output a label to mark the beginning of a source code line entry
9653 and record information relating to this source line, in
9654 'line_info_table' for later output of the .debug_line section. */
9657 dwarf2out_line (filename
, line
)
9658 register char *filename
;
9659 register unsigned line
;
9661 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9663 function_section (current_function_decl
);
9665 if (DECL_SECTION_NAME (current_function_decl
))
9667 register dw_separate_line_info_ref line_info
;
9668 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, SEPARATE_LINE_CODE_LABEL
,
9669 separate_line_info_table_in_use
);
9670 fputc ('\n', asm_out_file
);
9672 /* expand the line info table if necessary */
9673 if (separate_line_info_table_in_use
9674 == separate_line_info_table_allocated
)
9676 separate_line_info_table_allocated
+= LINE_INFO_TABLE_INCREMENT
;
9677 separate_line_info_table
9678 = (dw_separate_line_info_ref
)
9679 xrealloc (separate_line_info_table
,
9680 separate_line_info_table_allocated
9681 * sizeof (dw_separate_line_info_entry
));
9684 /* Add the new entry at the end of the line_info_table. */
9686 = &separate_line_info_table
[separate_line_info_table_in_use
++];
9687 line_info
->dw_file_num
= lookup_filename (filename
);
9688 line_info
->dw_line_num
= line
;
9689 line_info
->function
= current_funcdef_number
;
9693 register dw_line_info_ref line_info
;
9695 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, LINE_CODE_LABEL
,
9696 line_info_table_in_use
);
9697 fputc ('\n', asm_out_file
);
9699 /* Expand the line info table if necessary. */
9700 if (line_info_table_in_use
== line_info_table_allocated
)
9702 line_info_table_allocated
+= LINE_INFO_TABLE_INCREMENT
;
9704 = (dw_line_info_ref
)
9705 xrealloc (line_info_table
,
9706 (line_info_table_allocated
9707 * sizeof (dw_line_info_entry
)));
9710 /* Add the new entry at the end of the line_info_table. */
9711 line_info
= &line_info_table
[line_info_table_in_use
++];
9712 line_info
->dw_file_num
= lookup_filename (filename
);
9713 line_info
->dw_line_num
= line
;
9718 /* Record the beginning of a new source file, for later output
9719 of the .debug_macinfo section. At present, unimplemented. */
9722 dwarf2out_start_source_file (filename
)
9723 register char *filename ATTRIBUTE_UNUSED
;
9727 /* Record the end of a source file, for later output
9728 of the .debug_macinfo section. At present, unimplemented. */
9731 dwarf2out_end_source_file ()
9735 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9736 the tail part of the directive line, i.e. the part which is past the
9737 initial whitespace, #, whitespace, directive-name, whitespace part. */
9740 dwarf2out_define (lineno
, buffer
)
9741 register unsigned lineno
;
9742 register char *buffer
;
9744 static int initialized
= 0;
9747 dwarf2out_start_source_file (primary_filename
);
9752 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9753 the tail part of the directive line, i.e. the part which is past the
9754 initial whitespace, #, whitespace, directive-name, whitespace part. */
9757 dwarf2out_undef (lineno
, buffer
)
9758 register unsigned lineno ATTRIBUTE_UNUSED
;
9759 register char *buffer ATTRIBUTE_UNUSED
;
9763 /* Set up for Dwarf output at the start of compilation. */
9766 dwarf2out_init (asm_out_file
, main_input_filename
)
9767 register FILE *asm_out_file
;
9768 register char *main_input_filename
;
9770 /* Remember the name of the primary input file. */
9771 primary_filename
= main_input_filename
;
9773 /* Allocate the initial hunk of the file_table. */
9774 file_table
= (char **) xmalloc (FILE_TABLE_INCREMENT
* sizeof (char *));
9775 bzero ((char *) file_table
, FILE_TABLE_INCREMENT
* sizeof (char *));
9776 file_table_allocated
= FILE_TABLE_INCREMENT
;
9778 /* Skip the first entry - file numbers begin at 1. */
9779 file_table_in_use
= 1;
9781 /* Allocate the initial hunk of the decl_die_table. */
9783 = (dw_die_ref
*) xmalloc (DECL_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9784 bzero ((char *) decl_die_table
,
9785 DECL_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9786 decl_die_table_allocated
= DECL_DIE_TABLE_INCREMENT
;
9787 decl_die_table_in_use
= 0;
9789 /* Allocate the initial hunk of the decl_scope_table. */
9791 = (decl_scope_node
*) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9792 * sizeof (decl_scope_node
));
9793 bzero ((char *) decl_scope_table
,
9794 DECL_SCOPE_TABLE_INCREMENT
* sizeof (decl_scope_node
));
9795 decl_scope_table_allocated
= DECL_SCOPE_TABLE_INCREMENT
;
9796 decl_scope_depth
= 0;
9798 /* Allocate the initial hunk of the abbrev_die_table. */
9800 = (dw_die_ref
*) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9801 * sizeof (dw_die_ref
));
9802 bzero ((char *) abbrev_die_table
,
9803 ABBREV_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9804 abbrev_die_table_allocated
= ABBREV_DIE_TABLE_INCREMENT
;
9805 /* Zero-th entry is allocated, but unused */
9806 abbrev_die_table_in_use
= 1;
9808 /* Allocate the initial hunk of the line_info_table. */
9810 = (dw_line_info_ref
) xmalloc (LINE_INFO_TABLE_INCREMENT
9811 * sizeof (dw_line_info_entry
));
9812 bzero ((char *) line_info_table
,
9813 LINE_INFO_TABLE_INCREMENT
* sizeof (dw_line_info_entry
));
9814 line_info_table_allocated
= LINE_INFO_TABLE_INCREMENT
;
9815 /* Zero-th entry is allocated, but unused */
9816 line_info_table_in_use
= 1;
9818 /* Generate the initial DIE for the .debug section. Note that the (string)
9819 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9820 will (typically) be a relative pathname and that this pathname should be
9821 taken as being relative to the directory from which the compiler was
9822 invoked when the given (base) source file was compiled. */
9823 gen_compile_unit_die (main_input_filename
);
9825 ASM_GENERATE_INTERNAL_LABEL (text_end_label
, TEXT_END_LABEL
, 0);
9828 /* Output stuff that dwarf requires at the end of every file,
9829 and generate the DWARF-2 debugging info. */
9834 limbo_die_node
*node
, *next_node
;
9838 /* Traverse the limbo die list, and add parent/child links. The only
9839 dies without parents that should be here are concrete instances of
9840 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9841 For concrete instances, we can get the parent die from the abstract
9843 for (node
= limbo_die_list
; node
; node
= next_node
)
9845 next_node
= node
->next
;
9848 if (die
->die_parent
== NULL
)
9850 a
= get_AT (die
, DW_AT_abstract_origin
);
9852 add_child_die (a
->dw_attr_val
.v
.val_die_ref
->die_parent
, die
);
9853 else if (die
== comp_unit_die
)
9861 /* Traverse the DIE tree and add sibling attributes to those DIE's
9862 that have children. */
9863 add_sibling_attributes (comp_unit_die
);
9865 /* Output a terminator label for the .text section. */
9866 fputc ('\n', asm_out_file
);
9867 ASM_OUTPUT_SECTION (asm_out_file
, TEXT_SECTION
);
9868 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, TEXT_END_LABEL
, 0);
9871 /* Output a terminator label for the .data section. */
9872 fputc ('\n', asm_out_file
);
9873 ASM_OUTPUT_SECTION (asm_out_file
, DATA_SECTION
);
9874 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, DATA_END_LABEL
, 0);
9876 /* Output a terminator label for the .bss section. */
9877 fputc ('\n', asm_out_file
);
9878 ASM_OUTPUT_SECTION (asm_out_file
, BSS_SECTION
);
9879 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BSS_END_LABEL
, 0);
9882 /* Output the source line correspondence table. */
9883 if (line_info_table_in_use
> 1 || separate_line_info_table_in_use
)
9885 fputc ('\n', asm_out_file
);
9886 ASM_OUTPUT_SECTION (asm_out_file
, DEBUG_LINE_SECTION
);
9887 output_line_info ();
9889 /* We can only use the low/high_pc attributes if all of the code
9891 if (separate_line_info_table_in_use
== 0)
9893 add_AT_lbl_id (comp_unit_die
, DW_AT_low_pc
,
9894 stripattributes (TEXT_SECTION
));
9895 add_AT_lbl_id (comp_unit_die
, DW_AT_high_pc
, text_end_label
);
9898 add_AT_section_offset (comp_unit_die
, DW_AT_stmt_list
, DEBUG_LINE_SECTION
);
9901 /* Output the abbreviation table. */
9902 fputc ('\n', asm_out_file
);
9903 ASM_OUTPUT_SECTION (asm_out_file
, ABBREV_SECTION
);
9904 build_abbrev_table (comp_unit_die
);
9905 output_abbrev_section ();
9907 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9908 next_die_offset
= DWARF_COMPILE_UNIT_HEADER_SIZE
;
9909 calc_die_sizes (comp_unit_die
);
9911 /* Output debugging information. */
9912 fputc ('\n', asm_out_file
);
9913 ASM_OUTPUT_SECTION (asm_out_file
, DEBUG_INFO_SECTION
);
9914 output_compilation_unit_header ();
9915 output_die (comp_unit_die
);
9917 if (pubname_table_in_use
)
9919 /* Output public names table. */
9920 fputc ('\n', asm_out_file
);
9921 ASM_OUTPUT_SECTION (asm_out_file
, PUBNAMES_SECTION
);
9925 if (fde_table_in_use
)
9927 /* Output the address range information. */
9928 fputc ('\n', asm_out_file
);
9929 ASM_OUTPUT_SECTION (asm_out_file
, ARANGES_SECTION
);
9933 #endif /* DWARF2_DEBUGGING_INFO */