1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 93, 95, 96, 97, 1998 Free Software Foundation, Inc.
3 Contributed by Gary Funck (gary@intrepid.com).
4 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
5 Extensively modified by Jason Merrill (jason@cygnus.com).
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* The first part of this file deals with the DWARF 2 frame unwind
24 information, which is also used by the GCC efficient exception handling
25 mechanism. The second part, controlled only by an #ifdef
26 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
35 #include "hard-reg-set.h"
37 #include "insn-config.h"
43 #include "dwarf2out.h"
45 #include "dyn-string.h"
47 /* We cannot use <assert.h> in GCC source, since that would include
48 GCC's assert.h, which may not be compatible with the host compiler. */
53 # define assert(e) do { if (! (e)) abort (); } while (0)
56 /* Decide whether we want to emit frame unwind information for the current
62 return (write_symbols
== DWARF2_DEBUG
63 #ifdef DWARF2_FRAME_INFO
66 #ifdef DWARF2_UNWIND_INFO
67 || (flag_exceptions
&& ! exceptions_via_longjmp
)
72 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
78 /* How to start an assembler comment. */
79 #ifndef ASM_COMMENT_START
80 #define ASM_COMMENT_START ";#"
83 typedef struct dw_cfi_struct
*dw_cfi_ref
;
84 typedef struct dw_fde_struct
*dw_fde_ref
;
85 typedef union dw_cfi_oprnd_struct
*dw_cfi_oprnd_ref
;
87 /* Call frames are described using a sequence of Call Frame
88 Information instructions. The register number, offset
89 and address fields are provided as possible operands;
90 their use is selected by the opcode field. */
92 typedef union dw_cfi_oprnd_struct
94 unsigned long dw_cfi_reg_num
;
95 long int dw_cfi_offset
;
100 typedef struct dw_cfi_struct
102 dw_cfi_ref dw_cfi_next
;
103 enum dwarf_call_frame_info dw_cfi_opc
;
104 dw_cfi_oprnd dw_cfi_oprnd1
;
105 dw_cfi_oprnd dw_cfi_oprnd2
;
109 /* All call frame descriptions (FDE's) in the GCC generated DWARF
110 refer to a single Common Information Entry (CIE), defined at
111 the beginning of the .debug_frame section. This used of a single
112 CIE obviates the need to keep track of multiple CIE's
113 in the DWARF generation routines below. */
115 typedef struct dw_fde_struct
118 char *dw_fde_current_label
;
120 dw_cfi_ref dw_fde_cfi
;
124 /* Maximum size (in bytes) of an artificially generated label. */
125 #define MAX_ARTIFICIAL_LABEL_BYTES 30
127 /* Make sure we know the sizes of the various types dwarf can describe. These
128 are only defaults. If the sizes are different for your target, you should
129 override these values by defining the appropriate symbols in your tm.h
132 #ifndef CHAR_TYPE_SIZE
133 #define CHAR_TYPE_SIZE BITS_PER_UNIT
136 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
139 /* The size in bytes of a DWARF field indicating an offset or length
140 relative to a debug info section, specified to be 4 bytes in the DWARF-2
141 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
143 #ifndef DWARF_OFFSET_SIZE
144 #define DWARF_OFFSET_SIZE 4
147 #define DWARF_VERSION 2
149 /* Round SIZE up to the nearest BOUNDARY. */
150 #define DWARF_ROUND(SIZE,BOUNDARY) \
151 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
153 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
154 #ifdef STACK_GROWS_DOWNWARD
155 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
157 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
160 /* A pointer to the base of a table that contains frame description
161 information for each routine. */
162 static dw_fde_ref fde_table
;
164 /* Number of elements currently allocated for fde_table. */
165 static unsigned fde_table_allocated
;
167 /* Number of elements in fde_table currently in use. */
168 static unsigned fde_table_in_use
;
170 /* Size (in elements) of increments by which we may expand the
172 #define FDE_TABLE_INCREMENT 256
174 /* A list of call frame insns for the CIE. */
175 static dw_cfi_ref cie_cfi_head
;
177 /* The number of the current function definition for which debugging
178 information is being generated. These numbers range from 1 up to the
179 maximum number of function definitions contained within the current
180 compilation unit. These numbers are used to create unique label id's
181 unique to each function definition. */
182 static unsigned current_funcdef_number
= 0;
184 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
185 attribute that accelerates the lookup of the FDE associated
186 with the subprogram. This variable holds the table index of the FDE
187 associated with the current function (body) definition. */
188 static unsigned current_funcdef_fde
;
190 /* Forward declarations for functions defined in this file. */
192 static char *stripattributes
PROTO((char *));
193 static char *dwarf_cfi_name
PROTO((unsigned));
194 static dw_cfi_ref new_cfi
PROTO((void));
195 static void add_cfi
PROTO((dw_cfi_ref
*, dw_cfi_ref
));
196 static unsigned long size_of_uleb128
PROTO((unsigned long));
197 static unsigned long size_of_sleb128
PROTO((long));
198 static void output_uleb128
PROTO((unsigned long));
199 static void output_sleb128
PROTO((long));
200 static void add_fde_cfi
PROTO((char *, dw_cfi_ref
));
201 static void lookup_cfa_1
PROTO((dw_cfi_ref
, unsigned long *,
203 static void lookup_cfa
PROTO((unsigned long *, long *));
204 static void reg_save
PROTO((char *, unsigned, unsigned,
206 static void initial_return_save
PROTO((rtx
));
207 static void output_cfi
PROTO((dw_cfi_ref
, dw_fde_ref
));
208 static void output_call_frame_info
PROTO((int));
209 static unsigned reg_number
PROTO((rtx
));
210 static void dwarf2out_stack_adjust
PROTO((rtx
));
212 /* Definitions of defaults for assembler-dependent names of various
213 pseudo-ops and section names.
214 Theses may be overridden in the tm.h file (if necessary) for a particular
217 #ifdef OBJECT_FORMAT_ELF
218 #ifndef UNALIGNED_SHORT_ASM_OP
219 #define UNALIGNED_SHORT_ASM_OP ".2byte"
221 #ifndef UNALIGNED_INT_ASM_OP
222 #define UNALIGNED_INT_ASM_OP ".4byte"
224 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
225 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
227 #endif /* OBJECT_FORMAT_ELF */
230 #define ASM_BYTE_OP ".byte"
233 /* Data and reference forms for relocatable data. */
234 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
235 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
237 /* Pseudo-op for defining a new section. */
238 #ifndef SECTION_ASM_OP
239 #define SECTION_ASM_OP ".section"
242 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
243 print the SECTION_ASM_OP and the section name. The default here works for
244 almost all svr4 assemblers, except for the sparc, where the section name
245 must be enclosed in double quotes. (See sparcv4.h). */
246 #ifndef SECTION_FORMAT
247 #ifdef PUSHSECTION_FORMAT
248 #define SECTION_FORMAT PUSHSECTION_FORMAT
250 #define SECTION_FORMAT "\t%s\t%s\n"
254 #ifndef FRAME_SECTION
255 #define FRAME_SECTION ".debug_frame"
258 #ifndef FUNC_BEGIN_LABEL
259 #define FUNC_BEGIN_LABEL "LFB"
261 #ifndef FUNC_END_LABEL
262 #define FUNC_END_LABEL "LFE"
264 #define CIE_AFTER_SIZE_LABEL "LSCIE"
265 #define CIE_END_LABEL "LECIE"
266 #define CIE_LENGTH_LABEL "LLCIE"
267 #define FDE_AFTER_SIZE_LABEL "LSFDE"
268 #define FDE_END_LABEL "LEFDE"
269 #define FDE_LENGTH_LABEL "LLFDE"
271 /* Definitions of defaults for various types of primitive assembly language
272 output operations. These may be overridden from within the tm.h file,
273 but typically, that is unnecessary. */
275 #ifndef ASM_OUTPUT_SECTION
276 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
277 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
280 #ifndef ASM_OUTPUT_DWARF_DATA1
281 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
282 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
285 #ifndef ASM_OUTPUT_DWARF_DELTA1
286 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
287 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
288 assemble_name (FILE, LABEL1); \
289 fprintf (FILE, "-"); \
290 assemble_name (FILE, LABEL2); \
294 #ifdef UNALIGNED_INT_ASM_OP
296 #ifndef UNALIGNED_OFFSET_ASM_OP
297 #define UNALIGNED_OFFSET_ASM_OP \
298 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
301 #ifndef UNALIGNED_WORD_ASM_OP
302 #define UNALIGNED_WORD_ASM_OP \
303 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
306 #ifndef ASM_OUTPUT_DWARF_DELTA2
307 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
308 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
309 assemble_name (FILE, LABEL1); \
310 fprintf (FILE, "-"); \
311 assemble_name (FILE, LABEL2); \
315 #ifndef ASM_OUTPUT_DWARF_DELTA4
316 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
317 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
318 assemble_name (FILE, LABEL1); \
319 fprintf (FILE, "-"); \
320 assemble_name (FILE, LABEL2); \
324 #ifndef ASM_OUTPUT_DWARF_DELTA
325 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
326 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
327 assemble_name (FILE, LABEL1); \
328 fprintf (FILE, "-"); \
329 assemble_name (FILE, LABEL2); \
333 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
334 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
335 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
336 assemble_name (FILE, LABEL1); \
337 fprintf (FILE, "-"); \
338 assemble_name (FILE, LABEL2); \
342 #ifndef ASM_OUTPUT_DWARF_ADDR
343 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
344 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
345 assemble_name (FILE, LABEL); \
349 /* ??? This macro takes an RTX in dwarfout.c and a string in dwarf2out.c.
350 We resolve the conflict by creating a new macro ASM_OUTPUT_DWARF2_ADDR_CONST
351 for ports that want to support both DWARF1 and DWARF2. This needs a better
352 solution. See also the comments in sparc/sp64-elf.h. */
353 #ifdef ASM_OUTPUT_DWARF2_ADDR_CONST
354 #undef ASM_OUTPUT_DWARF_ADDR_CONST
355 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
356 ASM_OUTPUT_DWARF2_ADDR_CONST (FILE, ADDR)
359 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
360 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
361 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
364 #ifndef ASM_OUTPUT_DWARF_OFFSET4
365 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
366 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
367 assemble_name (FILE, LABEL); \
371 #ifndef ASM_OUTPUT_DWARF_OFFSET
372 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
373 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
374 assemble_name (FILE, LABEL); \
378 #ifndef ASM_OUTPUT_DWARF_DATA2
379 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
380 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
383 #ifndef ASM_OUTPUT_DWARF_DATA4
384 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
385 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
388 #ifndef ASM_OUTPUT_DWARF_DATA
389 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
390 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
391 (unsigned long) (VALUE))
394 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
395 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
396 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
397 (unsigned long) (VALUE))
400 #ifndef ASM_OUTPUT_DWARF_DATA8
401 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
403 if (WORDS_BIG_ENDIAN) \
405 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
406 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
410 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
411 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
416 #else /* UNALIGNED_INT_ASM_OP */
418 /* We don't have unaligned support, let's hope the normal output works for
421 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
422 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
424 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
425 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
427 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
428 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
430 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
431 assemble_integer (gen_rtx_MINUS (HImode, \
432 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
433 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
436 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
437 assemble_integer (gen_rtx_MINUS (SImode, \
438 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
439 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
442 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
443 assemble_integer (gen_rtx_MINUS (Pmode, \
444 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
445 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
448 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
449 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
451 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
452 assemble_integer (GEN_INT (VALUE), 4, 1)
454 #endif /* UNALIGNED_INT_ASM_OP */
457 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
458 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
460 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
461 assemble_name (FILE, SY); \
463 assemble_name (FILE, HI); \
465 assemble_name (FILE, LO); \
468 #endif /* SET_ASM_OP */
470 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
471 newline is produced. When flag_debug_asm is asserted, we add commentary
472 at the end of the line, so we must avoid output of a newline here. */
473 #ifndef ASM_OUTPUT_DWARF_STRING
474 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
476 register int slen = strlen(P); \
477 register char *p = (P); \
479 fprintf (FILE, "\t.ascii \""); \
480 for (i = 0; i < slen; i++) \
482 register int c = p[i]; \
483 if (c == '\"' || c == '\\') \
485 if (c >= ' ' && c < 0177) \
489 fprintf (FILE, "\\%o", c); \
492 fprintf (FILE, "\\0\""); \
497 /* The DWARF 2 CFA column which tracks the return address. Normally this
498 is the column for PC, or the first column after all of the hard
500 #ifndef DWARF_FRAME_RETURN_COLUMN
502 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
504 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
508 /* The mapping from gcc register number to DWARF 2 CFA column number. By
509 default, we just provide columns for all registers. */
510 #ifndef DWARF_FRAME_REGNUM
511 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
514 /* Hook used by __throw. */
517 expand_builtin_dwarf_fp_regnum ()
519 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM
));
522 /* The offset from the incoming value of %sp to the top of the stack frame
523 for the current function. */
524 #ifndef INCOMING_FRAME_SP_OFFSET
525 #define INCOMING_FRAME_SP_OFFSET 0
528 /* Return a pointer to a copy of the section string name S with all
529 attributes stripped off, and an asterisk prepended (for assemble_name). */
535 char *stripped
= xmalloc (strlen (s
) + 2);
540 while (*s
&& *s
!= ',')
547 /* Return the register number described by a given RTL node. */
553 register unsigned regno
= REGNO (rtl
);
555 if (regno
>= FIRST_PSEUDO_REGISTER
)
557 warning ("internal regno botch: regno = %d\n", regno
);
561 regno
= DBX_REGISTER_NUMBER (regno
);
565 struct reg_size_range
572 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
573 We do this in kind of a roundabout way, by building up a list of
574 register size ranges and seeing where our register falls in one of those
575 ranges. We need to do it this way because REG_TREE is not a constant,
576 and the target macros were not designed to make this task easy. */
579 expand_builtin_dwarf_reg_size (reg_tree
, target
)
583 enum machine_mode mode
;
585 struct reg_size_range ranges
[5];
592 for (; i
< FIRST_PSEUDO_REGISTER
; ++i
)
594 /* The return address is out of order on the MIPS, and we don't use
595 copy_reg for it anyway, so we don't care here how large it is. */
596 if (DWARF_FRAME_REGNUM (i
) == DWARF_FRAME_RETURN_COLUMN
)
599 mode
= reg_raw_mode
[i
];
601 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
602 to use the same size as word_mode, since that reduces the number
603 of ranges we need. It should not matter, since the result should
604 never be used for a condition code register anyways. */
605 if (GET_MODE_CLASS (mode
) == MODE_CC
)
608 size
= GET_MODE_SIZE (mode
);
610 /* If this register is not valid in the specified mode and
611 we have a previous size, use that for the size of this
612 register to avoid making junk tiny ranges. */
613 if (! HARD_REGNO_MODE_OK (i
, mode
) && last_size
!= -1)
616 if (size
!= last_size
)
618 ranges
[n_ranges
].beg
= i
;
619 ranges
[n_ranges
].size
= last_size
= size
;
624 ranges
[n_ranges
-1].end
= i
;
627 /* The usual case: fp regs surrounded by general regs. */
628 if (n_ranges
== 3 && ranges
[0].size
== ranges
[2].size
)
630 if ((DWARF_FRAME_REGNUM (ranges
[1].end
)
631 - DWARF_FRAME_REGNUM (ranges
[1].beg
))
632 != ranges
[1].end
- ranges
[1].beg
)
634 t
= fold (build (GE_EXPR
, integer_type_node
, reg_tree
,
635 build_int_2 (DWARF_FRAME_REGNUM (ranges
[1].beg
), 0)));
636 t2
= fold (build (LE_EXPR
, integer_type_node
, reg_tree
,
637 build_int_2 (DWARF_FRAME_REGNUM (ranges
[1].end
), 0)));
638 t
= fold (build (TRUTH_ANDIF_EXPR
, integer_type_node
, t
, t2
));
639 t
= fold (build (COND_EXPR
, integer_type_node
, t
,
640 build_int_2 (ranges
[1].size
, 0),
641 build_int_2 (ranges
[0].size
, 0)));
645 /* Initialize last_end to be larger than any possible
646 DWARF_FRAME_REGNUM. */
647 int last_end
= 0x7fffffff;
649 t
= build_int_2 (ranges
[n_ranges
].size
, 0);
652 int beg
= DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
);
653 int end
= DWARF_FRAME_REGNUM (ranges
[n_ranges
].end
);
659 if (end
- beg
!= ranges
[n_ranges
].end
- ranges
[n_ranges
].beg
)
661 t2
= fold (build (LE_EXPR
, integer_type_node
, reg_tree
,
662 build_int_2 (end
, 0)));
663 t
= fold (build (COND_EXPR
, integer_type_node
, t2
,
664 build_int_2 (ranges
[n_ranges
].size
, 0), t
));
666 while (--n_ranges
>= 0);
668 return expand_expr (t
, target
, Pmode
, 0);
671 /* Convert a DWARF call frame info. operation to its string name */
674 dwarf_cfi_name (cfi_opc
)
675 register unsigned cfi_opc
;
679 case DW_CFA_advance_loc
:
680 return "DW_CFA_advance_loc";
682 return "DW_CFA_offset";
684 return "DW_CFA_restore";
688 return "DW_CFA_set_loc";
689 case DW_CFA_advance_loc1
:
690 return "DW_CFA_advance_loc1";
691 case DW_CFA_advance_loc2
:
692 return "DW_CFA_advance_loc2";
693 case DW_CFA_advance_loc4
:
694 return "DW_CFA_advance_loc4";
695 case DW_CFA_offset_extended
:
696 return "DW_CFA_offset_extended";
697 case DW_CFA_restore_extended
:
698 return "DW_CFA_restore_extended";
699 case DW_CFA_undefined
:
700 return "DW_CFA_undefined";
701 case DW_CFA_same_value
:
702 return "DW_CFA_same_value";
703 case DW_CFA_register
:
704 return "DW_CFA_register";
705 case DW_CFA_remember_state
:
706 return "DW_CFA_remember_state";
707 case DW_CFA_restore_state
:
708 return "DW_CFA_restore_state";
710 return "DW_CFA_def_cfa";
711 case DW_CFA_def_cfa_register
:
712 return "DW_CFA_def_cfa_register";
713 case DW_CFA_def_cfa_offset
:
714 return "DW_CFA_def_cfa_offset";
716 /* SGI/MIPS specific */
717 case DW_CFA_MIPS_advance_loc8
:
718 return "DW_CFA_MIPS_advance_loc8";
721 case DW_CFA_GNU_window_save
:
722 return "DW_CFA_GNU_window_save";
723 case DW_CFA_GNU_args_size
:
724 return "DW_CFA_GNU_args_size";
727 return "DW_CFA_<unknown>";
731 /* Return a pointer to a newly allocated Call Frame Instruction. */
733 static inline dw_cfi_ref
736 register dw_cfi_ref cfi
= (dw_cfi_ref
) xmalloc (sizeof (dw_cfi_node
));
738 cfi
->dw_cfi_next
= NULL
;
739 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= 0;
740 cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
= 0;
745 /* Add a Call Frame Instruction to list of instructions. */
748 add_cfi (list_head
, cfi
)
749 register dw_cfi_ref
*list_head
;
750 register dw_cfi_ref cfi
;
752 register dw_cfi_ref
*p
;
754 /* Find the end of the chain. */
755 for (p
= list_head
; (*p
) != NULL
; p
= &(*p
)->dw_cfi_next
)
761 /* Generate a new label for the CFI info to refer to. */
764 dwarf2out_cfi_label ()
766 static char label
[20];
767 static unsigned long label_num
= 0;
769 ASM_GENERATE_INTERNAL_LABEL (label
, "LCFI", label_num
++);
770 ASM_OUTPUT_LABEL (asm_out_file
, label
);
775 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
776 or to the CIE if LABEL is NULL. */
779 add_fde_cfi (label
, cfi
)
780 register char *label
;
781 register dw_cfi_ref cfi
;
785 register dw_fde_ref fde
= &fde_table
[fde_table_in_use
- 1];
788 label
= dwarf2out_cfi_label ();
790 if (fde
->dw_fde_current_label
== NULL
791 || strcmp (label
, fde
->dw_fde_current_label
) != 0)
793 register dw_cfi_ref xcfi
;
795 fde
->dw_fde_current_label
= label
= xstrdup (label
);
797 /* Set the location counter to the new label. */
799 xcfi
->dw_cfi_opc
= DW_CFA_advance_loc4
;
800 xcfi
->dw_cfi_oprnd1
.dw_cfi_addr
= label
;
801 add_cfi (&fde
->dw_fde_cfi
, xcfi
);
804 add_cfi (&fde
->dw_fde_cfi
, cfi
);
808 add_cfi (&cie_cfi_head
, cfi
);
811 /* Subroutine of lookup_cfa. */
814 lookup_cfa_1 (cfi
, regp
, offsetp
)
815 register dw_cfi_ref cfi
;
816 register unsigned long *regp
;
817 register long *offsetp
;
819 switch (cfi
->dw_cfi_opc
)
821 case DW_CFA_def_cfa_offset
:
822 *offsetp
= cfi
->dw_cfi_oprnd1
.dw_cfi_offset
;
824 case DW_CFA_def_cfa_register
:
825 *regp
= cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
;
828 *regp
= cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
;
829 *offsetp
= cfi
->dw_cfi_oprnd2
.dw_cfi_offset
;
836 /* Find the previous value for the CFA. */
839 lookup_cfa (regp
, offsetp
)
840 register unsigned long *regp
;
841 register long *offsetp
;
843 register dw_cfi_ref cfi
;
845 *regp
= (unsigned long) -1;
848 for (cfi
= cie_cfi_head
; cfi
; cfi
= cfi
->dw_cfi_next
)
849 lookup_cfa_1 (cfi
, regp
, offsetp
);
851 if (fde_table_in_use
)
853 register dw_fde_ref fde
= &fde_table
[fde_table_in_use
- 1];
854 for (cfi
= fde
->dw_fde_cfi
; cfi
; cfi
= cfi
->dw_cfi_next
)
855 lookup_cfa_1 (cfi
, regp
, offsetp
);
859 /* The current rule for calculating the DWARF2 canonical frame address. */
860 static unsigned long cfa_reg
;
861 static long cfa_offset
;
863 /* The register used for saving registers to the stack, and its offset
865 static unsigned cfa_store_reg
;
866 static long cfa_store_offset
;
868 /* The running total of the size of arguments pushed onto the stack. */
869 static long args_size
;
871 /* The last args_size we actually output. */
872 static long old_args_size
;
874 /* Entry point to update the canonical frame address (CFA).
875 LABEL is passed to add_fde_cfi. The value of CFA is now to be
876 calculated from REG+OFFSET. */
879 dwarf2out_def_cfa (label
, reg
, offset
)
880 register char *label
;
881 register unsigned reg
;
882 register long offset
;
884 register dw_cfi_ref cfi
;
885 unsigned long old_reg
;
890 if (cfa_store_reg
== reg
)
891 cfa_store_offset
= offset
;
893 reg
= DWARF_FRAME_REGNUM (reg
);
894 lookup_cfa (&old_reg
, &old_offset
);
896 if (reg
== old_reg
&& offset
== old_offset
)
903 cfi
->dw_cfi_opc
= DW_CFA_def_cfa_offset
;
904 cfi
->dw_cfi_oprnd1
.dw_cfi_offset
= offset
;
907 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
908 else if (offset
== old_offset
&& old_reg
!= (unsigned long) -1)
910 cfi
->dw_cfi_opc
= DW_CFA_def_cfa_register
;
911 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
917 cfi
->dw_cfi_opc
= DW_CFA_def_cfa
;
918 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
919 cfi
->dw_cfi_oprnd2
.dw_cfi_offset
= offset
;
922 add_fde_cfi (label
, cfi
);
925 /* Add the CFI for saving a register. REG is the CFA column number.
926 LABEL is passed to add_fde_cfi.
927 If SREG is -1, the register is saved at OFFSET from the CFA;
928 otherwise it is saved in SREG. */
931 reg_save (label
, reg
, sreg
, offset
)
932 register char * label
;
933 register unsigned reg
;
934 register unsigned sreg
;
935 register long offset
;
937 register dw_cfi_ref cfi
= new_cfi ();
939 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
941 /* The following comparison is correct. -1 is used to indicate that
942 the value isn't a register number. */
943 if (sreg
== (unsigned int) -1)
946 /* The register number won't fit in 6 bits, so we have to use
948 cfi
->dw_cfi_opc
= DW_CFA_offset_extended
;
950 cfi
->dw_cfi_opc
= DW_CFA_offset
;
952 offset
/= DWARF_CIE_DATA_ALIGNMENT
;
955 cfi
->dw_cfi_oprnd2
.dw_cfi_offset
= offset
;
959 cfi
->dw_cfi_opc
= DW_CFA_register
;
960 cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
= sreg
;
963 add_fde_cfi (label
, cfi
);
966 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
967 This CFI tells the unwinder that it needs to restore the window registers
968 from the previous frame's window save area.
970 ??? Perhaps we should note in the CIE where windows are saved (instead of
971 assuming 0(cfa)) and what registers are in the window. */
974 dwarf2out_window_save (label
)
975 register char * label
;
977 register dw_cfi_ref cfi
= new_cfi ();
978 cfi
->dw_cfi_opc
= DW_CFA_GNU_window_save
;
979 add_fde_cfi (label
, cfi
);
982 /* Add a CFI to update the running total of the size of arguments
983 pushed onto the stack. */
986 dwarf2out_args_size (label
, size
)
990 register dw_cfi_ref cfi
;
992 if (size
== old_args_size
)
994 old_args_size
= size
;
997 cfi
->dw_cfi_opc
= DW_CFA_GNU_args_size
;
998 cfi
->dw_cfi_oprnd1
.dw_cfi_offset
= size
;
999 add_fde_cfi (label
, cfi
);
1002 /* Entry point for saving a register to the stack. REG is the GCC register
1003 number. LABEL and OFFSET are passed to reg_save. */
1006 dwarf2out_reg_save (label
, reg
, offset
)
1007 register char * label
;
1008 register unsigned reg
;
1009 register long offset
;
1011 reg_save (label
, DWARF_FRAME_REGNUM (reg
), -1, offset
);
1014 /* Entry point for saving the return address in the stack.
1015 LABEL and OFFSET are passed to reg_save. */
1018 dwarf2out_return_save (label
, offset
)
1019 register char * label
;
1020 register long offset
;
1022 reg_save (label
, DWARF_FRAME_RETURN_COLUMN
, -1, offset
);
1025 /* Entry point for saving the return address in a register.
1026 LABEL and SREG are passed to reg_save. */
1029 dwarf2out_return_reg (label
, sreg
)
1030 register char * label
;
1031 register unsigned sreg
;
1033 reg_save (label
, DWARF_FRAME_RETURN_COLUMN
, sreg
, 0);
1036 /* Record the initial position of the return address. RTL is
1037 INCOMING_RETURN_ADDR_RTX. */
1040 initial_return_save (rtl
)
1046 switch (GET_CODE (rtl
))
1049 /* RA is in a register. */
1050 reg
= reg_number (rtl
);
1053 /* RA is on the stack. */
1054 rtl
= XEXP (rtl
, 0);
1055 switch (GET_CODE (rtl
))
1058 if (REGNO (rtl
) != STACK_POINTER_REGNUM
)
1063 if (REGNO (XEXP (rtl
, 0)) != STACK_POINTER_REGNUM
)
1065 offset
= INTVAL (XEXP (rtl
, 1));
1068 if (REGNO (XEXP (rtl
, 0)) != STACK_POINTER_REGNUM
)
1070 offset
= -INTVAL (XEXP (rtl
, 1));
1077 /* The return address is at some offset from any value we can
1078 actually load. For instance, on the SPARC it is in %i7+8. Just
1079 ignore the offset for now; it doesn't matter for unwinding frames. */
1080 if (GET_CODE (XEXP (rtl
, 1)) != CONST_INT
)
1082 initial_return_save (XEXP (rtl
, 0));
1088 reg_save (NULL
, DWARF_FRAME_RETURN_COLUMN
, reg
, offset
- cfa_offset
);
1091 /* Check INSN to see if it looks like a push or a stack adjustment, and
1092 make a note of it if it does. EH uses this information to find out how
1093 much extra space it needs to pop off the stack. */
1096 dwarf2out_stack_adjust (insn
)
1102 if (! asynchronous_exceptions
&& GET_CODE (insn
) == CALL_INSN
)
1104 /* Extract the size of the args from the CALL rtx itself. */
1106 insn
= PATTERN (insn
);
1107 if (GET_CODE (insn
) == PARALLEL
)
1108 insn
= XVECEXP (insn
, 0, 0);
1109 if (GET_CODE (insn
) == SET
)
1110 insn
= SET_SRC (insn
);
1111 assert (GET_CODE (insn
) == CALL
);
1112 dwarf2out_args_size ("", INTVAL (XEXP (insn
, 1)));
1116 /* If only calls can throw, and we have a frame pointer,
1117 save up adjustments until we see the CALL_INSN. */
1118 else if (! asynchronous_exceptions
1119 && cfa_reg
!= STACK_POINTER_REGNUM
)
1122 if (GET_CODE (insn
) == BARRIER
)
1124 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1125 the compiler will have already emitted a stack adjustment, but
1126 doesn't bother for calls to noreturn functions. */
1127 #ifdef STACK_GROWS_DOWNWARD
1128 offset
= -args_size
;
1133 else if (GET_CODE (PATTERN (insn
)) == SET
)
1138 insn
= PATTERN (insn
);
1139 src
= SET_SRC (insn
);
1140 dest
= SET_DEST (insn
);
1142 if (dest
== stack_pointer_rtx
)
1144 /* (set (reg sp) (plus (reg sp) (const_int))) */
1145 code
= GET_CODE (src
);
1146 if (! (code
== PLUS
|| code
== MINUS
)
1147 || XEXP (src
, 0) != stack_pointer_rtx
1148 || GET_CODE (XEXP (src
, 1)) != CONST_INT
)
1151 offset
= INTVAL (XEXP (src
, 1));
1153 else if (GET_CODE (dest
) == MEM
)
1155 /* (set (mem (pre_dec (reg sp))) (foo)) */
1156 src
= XEXP (dest
, 0);
1157 code
= GET_CODE (src
);
1159 if (! (code
== PRE_DEC
|| code
== PRE_INC
)
1160 || XEXP (src
, 0) != stack_pointer_rtx
)
1163 offset
= GET_MODE_SIZE (GET_MODE (dest
));
1168 if (code
== PLUS
|| code
== PRE_INC
)
1177 if (cfa_reg
== STACK_POINTER_REGNUM
)
1178 cfa_offset
+= offset
;
1180 #ifndef STACK_GROWS_DOWNWARD
1183 args_size
+= offset
;
1187 label
= dwarf2out_cfi_label ();
1188 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1189 dwarf2out_args_size (label
, args_size
);
1192 /* Record call frame debugging information for INSN, which either
1193 sets SP or FP (adjusting how we calculate the frame address) or saves a
1194 register to the stack. If INSN is NULL_RTX, initialize our state. */
1197 dwarf2out_frame_debug (insn
)
1204 /* A temporary register used in adjusting SP or setting up the store_reg. */
1205 static unsigned cfa_temp_reg
;
1206 static long cfa_temp_value
;
1208 if (insn
== NULL_RTX
)
1210 /* Set up state for generating call frame debug info. */
1211 lookup_cfa (&cfa_reg
, &cfa_offset
);
1212 if (cfa_reg
!= DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM
))
1214 cfa_reg
= STACK_POINTER_REGNUM
;
1215 cfa_store_reg
= cfa_reg
;
1216 cfa_store_offset
= cfa_offset
;
1222 if (! RTX_FRAME_RELATED_P (insn
))
1224 dwarf2out_stack_adjust (insn
);
1228 label
= dwarf2out_cfi_label ();
1230 src
= find_reg_note (insn
, REG_FRAME_RELATED_EXPR
, NULL_RTX
);
1232 insn
= XEXP (src
, 0);
1234 insn
= PATTERN (insn
);
1236 /* Assume that in a PARALLEL prologue insn, only the first elt is
1237 significant. Currently this is true. */
1238 if (GET_CODE (insn
) == PARALLEL
)
1239 insn
= XVECEXP (insn
, 0, 0);
1240 if (GET_CODE (insn
) != SET
)
1243 src
= SET_SRC (insn
);
1244 dest
= SET_DEST (insn
);
1246 switch (GET_CODE (dest
))
1249 /* Update the CFA rule wrt SP or FP. Make sure src is
1250 relative to the current CFA register. */
1251 switch (GET_CODE (src
))
1253 /* Setting FP from SP. */
1255 if (cfa_reg
!= (unsigned) REGNO (src
))
1257 if (REGNO (dest
) != STACK_POINTER_REGNUM
1258 && !(frame_pointer_needed
1259 && REGNO (dest
) == HARD_FRAME_POINTER_REGNUM
))
1261 cfa_reg
= REGNO (dest
);
1266 if (dest
== stack_pointer_rtx
)
1269 switch (GET_CODE (XEXP (src
, 1)))
1272 offset
= INTVAL (XEXP (src
, 1));
1275 if ((unsigned) REGNO (XEXP (src
, 1)) != cfa_temp_reg
)
1277 offset
= cfa_temp_value
;
1283 if (XEXP (src
, 0) == hard_frame_pointer_rtx
)
1285 /* Restoring SP from FP in the epilogue. */
1286 if (cfa_reg
!= (unsigned) HARD_FRAME_POINTER_REGNUM
)
1288 cfa_reg
= STACK_POINTER_REGNUM
;
1290 else if (XEXP (src
, 0) != stack_pointer_rtx
)
1293 if (GET_CODE (src
) == PLUS
)
1295 if (cfa_reg
== STACK_POINTER_REGNUM
)
1296 cfa_offset
+= offset
;
1297 if (cfa_store_reg
== STACK_POINTER_REGNUM
)
1298 cfa_store_offset
+= offset
;
1300 else if (dest
== hard_frame_pointer_rtx
)
1302 /* Either setting the FP from an offset of the SP,
1303 or adjusting the FP */
1304 if (! frame_pointer_needed
1305 || REGNO (dest
) != HARD_FRAME_POINTER_REGNUM
)
1308 if (XEXP (src
, 0) == stack_pointer_rtx
1309 && GET_CODE (XEXP (src
, 1)) == CONST_INT
)
1311 if (cfa_reg
!= STACK_POINTER_REGNUM
)
1313 offset
= INTVAL (XEXP (src
, 1));
1314 if (GET_CODE (src
) == PLUS
)
1316 cfa_offset
+= offset
;
1317 cfa_reg
= HARD_FRAME_POINTER_REGNUM
;
1319 else if (XEXP (src
, 0) == hard_frame_pointer_rtx
1320 && GET_CODE (XEXP (src
, 1)) == CONST_INT
)
1322 if (cfa_reg
!= (unsigned) HARD_FRAME_POINTER_REGNUM
)
1324 offset
= INTVAL (XEXP (src
, 1));
1325 if (GET_CODE (src
) == PLUS
)
1327 cfa_offset
+= offset
;
1335 if (GET_CODE (src
) != PLUS
1336 || XEXP (src
, 1) != stack_pointer_rtx
)
1338 if (GET_CODE (XEXP (src
, 0)) != REG
1339 || (unsigned) REGNO (XEXP (src
, 0)) != cfa_temp_reg
)
1341 if (cfa_reg
!= STACK_POINTER_REGNUM
)
1343 cfa_store_reg
= REGNO (dest
);
1344 cfa_store_offset
= cfa_offset
- cfa_temp_value
;
1349 cfa_temp_reg
= REGNO (dest
);
1350 cfa_temp_value
= INTVAL (src
);
1354 if (GET_CODE (XEXP (src
, 0)) != REG
1355 || (unsigned) REGNO (XEXP (src
, 0)) != cfa_temp_reg
1356 || (unsigned) REGNO (dest
) != cfa_temp_reg
1357 || GET_CODE (XEXP (src
, 1)) != CONST_INT
)
1359 cfa_temp_value
|= INTVAL (XEXP (src
, 1));
1365 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1369 /* Saving a register to the stack. Make sure dest is relative to the
1371 if (GET_CODE (src
) != REG
)
1373 switch (GET_CODE (XEXP (dest
, 0)))
1378 offset
= GET_MODE_SIZE (GET_MODE (dest
));
1379 if (GET_CODE (XEXP (dest
, 0)) == PRE_INC
)
1382 if (REGNO (XEXP (XEXP (dest
, 0), 0)) != STACK_POINTER_REGNUM
1383 || cfa_store_reg
!= STACK_POINTER_REGNUM
)
1385 cfa_store_offset
+= offset
;
1386 if (cfa_reg
== STACK_POINTER_REGNUM
)
1387 cfa_offset
= cfa_store_offset
;
1389 offset
= -cfa_store_offset
;
1392 /* With an offset. */
1395 offset
= INTVAL (XEXP (XEXP (dest
, 0), 1));
1396 if (GET_CODE (src
) == MINUS
)
1399 if (cfa_store_reg
!= (unsigned) REGNO (XEXP (XEXP (dest
, 0), 0)))
1401 offset
-= cfa_store_offset
;
1404 /* Without an offset. */
1406 if (cfa_store_reg
!= (unsigned) REGNO (XEXP (dest
, 0)))
1408 offset
= -cfa_store_offset
;
1414 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1415 dwarf2out_reg_save (label
, REGNO (src
), offset
);
1423 /* Return the size of an unsigned LEB128 quantity. */
1425 static inline unsigned long
1426 size_of_uleb128 (value
)
1427 register unsigned long value
;
1429 register unsigned long size
= 0;
1430 register unsigned byte
;
1434 byte
= (value
& 0x7f);
1443 /* Return the size of a signed LEB128 quantity. */
1445 static inline unsigned long
1446 size_of_sleb128 (value
)
1447 register long value
;
1449 register unsigned long size
= 0;
1450 register unsigned byte
;
1454 byte
= (value
& 0x7f);
1458 while (!(((value
== 0) && ((byte
& 0x40) == 0))
1459 || ((value
== -1) && ((byte
& 0x40) != 0))));
1464 /* Output an unsigned LEB128 quantity. */
1467 output_uleb128 (value
)
1468 register unsigned long value
;
1470 unsigned long save_value
= value
;
1472 fprintf (asm_out_file
, "\t%s\t", ASM_BYTE_OP
);
1475 register unsigned byte
= (value
& 0x7f);
1478 /* More bytes to follow. */
1481 fprintf (asm_out_file
, "0x%x", byte
);
1483 fprintf (asm_out_file
, ",");
1488 fprintf (asm_out_file
, "\t%s ULEB128 0x%lx", ASM_COMMENT_START
, save_value
);
1491 /* Output an signed LEB128 quantity. */
1494 output_sleb128 (value
)
1495 register long value
;
1498 register unsigned byte
;
1499 long save_value
= value
;
1501 fprintf (asm_out_file
, "\t%s\t", ASM_BYTE_OP
);
1504 byte
= (value
& 0x7f);
1505 /* arithmetic shift */
1507 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
1508 || ((value
== -1) && ((byte
& 0x40) != 0))));
1512 fprintf (asm_out_file
, "0x%x", byte
);
1514 fprintf (asm_out_file
, ",");
1519 fprintf (asm_out_file
, "\t%s SLEB128 %ld", ASM_COMMENT_START
, save_value
);
1522 /* Output a Call Frame Information opcode and its operand(s). */
1525 output_cfi (cfi
, fde
)
1526 register dw_cfi_ref cfi
;
1527 register dw_fde_ref fde
;
1529 if (cfi
->dw_cfi_opc
== DW_CFA_advance_loc
)
1531 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1533 | (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
& 0x3f));
1535 fprintf (asm_out_file
, "\t%s DW_CFA_advance_loc 0x%lx",
1536 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1537 fputc ('\n', asm_out_file
);
1540 else if (cfi
->dw_cfi_opc
== DW_CFA_offset
)
1542 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1544 | (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
& 0x3f));
1546 fprintf (asm_out_file
, "\t%s DW_CFA_offset, column 0x%lx",
1547 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1549 fputc ('\n', asm_out_file
);
1550 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_offset
);
1551 fputc ('\n', asm_out_file
);
1553 else if (cfi
->dw_cfi_opc
== DW_CFA_restore
)
1555 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1557 | (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
& 0x3f));
1559 fprintf (asm_out_file
, "\t%s DW_CFA_restore, column 0x%lx",
1560 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1562 fputc ('\n', asm_out_file
);
1566 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, cfi
->dw_cfi_opc
);
1568 fprintf (asm_out_file
, "\t%s %s", ASM_COMMENT_START
,
1569 dwarf_cfi_name (cfi
->dw_cfi_opc
));
1571 fputc ('\n', asm_out_file
);
1572 switch (cfi
->dw_cfi_opc
)
1574 case DW_CFA_set_loc
:
1575 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, cfi
->dw_cfi_oprnd1
.dw_cfi_addr
);
1576 fputc ('\n', asm_out_file
);
1578 case DW_CFA_advance_loc1
:
1579 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file
,
1580 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1581 fde
->dw_fde_current_label
);
1582 fputc ('\n', asm_out_file
);
1583 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1585 case DW_CFA_advance_loc2
:
1586 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
,
1587 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1588 fde
->dw_fde_current_label
);
1589 fputc ('\n', asm_out_file
);
1590 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1592 case DW_CFA_advance_loc4
:
1593 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
,
1594 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1595 fde
->dw_fde_current_label
);
1596 fputc ('\n', asm_out_file
);
1597 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1599 #ifdef MIPS_DEBUGGING_INFO
1600 case DW_CFA_MIPS_advance_loc8
:
1601 /* TODO: not currently implemented. */
1605 case DW_CFA_offset_extended
:
1606 case DW_CFA_def_cfa
:
1607 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1608 fputc ('\n', asm_out_file
);
1609 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_offset
);
1610 fputc ('\n', asm_out_file
);
1612 case DW_CFA_restore_extended
:
1613 case DW_CFA_undefined
:
1614 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1615 fputc ('\n', asm_out_file
);
1617 case DW_CFA_same_value
:
1618 case DW_CFA_def_cfa_register
:
1619 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1620 fputc ('\n', asm_out_file
);
1622 case DW_CFA_register
:
1623 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1624 fputc ('\n', asm_out_file
);
1625 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
);
1626 fputc ('\n', asm_out_file
);
1628 case DW_CFA_def_cfa_offset
:
1629 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1630 fputc ('\n', asm_out_file
);
1632 case DW_CFA_GNU_window_save
:
1634 case DW_CFA_GNU_args_size
:
1635 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1636 fputc ('\n', asm_out_file
);
1644 #if !defined (EH_FRAME_SECTION)
1645 #if defined (EH_FRAME_SECTION_ASM_OP)
1646 #define EH_FRAME_SECTION() eh_frame_section();
1648 #if defined (ASM_OUTPUT_SECTION_NAME)
1649 #define EH_FRAME_SECTION() \
1651 named_section (NULL_TREE, ".eh_frame", 0); \
1657 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
1658 #if !defined (HAS_INIT_SECTION) && !defined (INIT_SECTION_ASM_OP)
1659 #undef EH_FRAME_SECTION
1662 /* Output the call frame information used to used to record information
1663 that relates to calculating the frame pointer, and records the
1664 location of saved registers. */
1667 output_call_frame_info (for_eh
)
1670 register unsigned long i
;
1671 register dw_fde_ref fde
;
1672 register dw_cfi_ref cfi
;
1673 char l1
[20], l2
[20];
1674 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1678 /* Do we want to include a pointer to the exception table? */
1679 int eh_ptr
= for_eh
&& exception_table_p ();
1681 fputc ('\n', asm_out_file
);
1683 /* We're going to be generating comments, so turn on app. */
1689 #ifdef EH_FRAME_SECTION
1690 EH_FRAME_SECTION ();
1692 tree label
= get_file_function_name ('F');
1695 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1696 ASM_GLOBALIZE_LABEL (asm_out_file
, IDENTIFIER_POINTER (label
));
1697 ASM_OUTPUT_LABEL (asm_out_file
, IDENTIFIER_POINTER (label
));
1699 assemble_label ("__FRAME_BEGIN__");
1702 ASM_OUTPUT_SECTION (asm_out_file
, FRAME_SECTION
);
1704 /* Output the CIE. */
1705 ASM_GENERATE_INTERNAL_LABEL (l1
, CIE_AFTER_SIZE_LABEL
, for_eh
);
1706 ASM_GENERATE_INTERNAL_LABEL (l2
, CIE_END_LABEL
, for_eh
);
1707 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1708 ASM_GENERATE_INTERNAL_LABEL (ld
, CIE_LENGTH_LABEL
, for_eh
);
1710 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file
, ld
);
1712 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, ld
);
1715 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l2
, l1
);
1717 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l2
, l1
);
1720 fprintf (asm_out_file
, "\t%s Length of Common Information Entry",
1723 fputc ('\n', asm_out_file
);
1724 ASM_OUTPUT_LABEL (asm_out_file
, l1
);
1727 /* Now that the CIE pointer is PC-relative for EH,
1728 use 0 to identify the CIE. */
1729 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 0);
1731 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, DW_CIE_ID
);
1734 fprintf (asm_out_file
, "\t%s CIE Identifier Tag", ASM_COMMENT_START
);
1736 fputc ('\n', asm_out_file
);
1737 if (! for_eh
&& DWARF_OFFSET_SIZE
== 8)
1739 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, DW_CIE_ID
);
1740 fputc ('\n', asm_out_file
);
1743 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_CIE_VERSION
);
1745 fprintf (asm_out_file
, "\t%s CIE Version", ASM_COMMENT_START
);
1747 fputc ('\n', asm_out_file
);
1750 /* The CIE contains a pointer to the exception region info for the
1751 frame. Make the augmentation string three bytes (including the
1752 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1753 can't handle unaligned relocs. */
1756 ASM_OUTPUT_DWARF_STRING (asm_out_file
, "eh");
1757 fprintf (asm_out_file
, "\t%s CIE Augmentation", ASM_COMMENT_START
);
1761 ASM_OUTPUT_ASCII (asm_out_file
, "eh", 3);
1763 fputc ('\n', asm_out_file
);
1765 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, "__EXCEPTION_TABLE__");
1767 fprintf (asm_out_file
, "\t%s pointer to exception region info",
1772 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
1774 fprintf (asm_out_file
, "\t%s CIE Augmentation (none)",
1778 fputc ('\n', asm_out_file
);
1781 fprintf (asm_out_file
, " (CIE Code Alignment Factor)");
1783 fputc ('\n', asm_out_file
);
1784 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT
);
1786 fprintf (asm_out_file
, " (CIE Data Alignment Factor)");
1788 fputc ('\n', asm_out_file
);
1789 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_FRAME_RETURN_COLUMN
);
1791 fprintf (asm_out_file
, "\t%s CIE RA Column", ASM_COMMENT_START
);
1793 fputc ('\n', asm_out_file
);
1795 for (cfi
= cie_cfi_head
; cfi
!= NULL
; cfi
= cfi
->dw_cfi_next
)
1796 output_cfi (cfi
, NULL
);
1798 /* Pad the CIE out to an address sized boundary. */
1799 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1800 ASM_OUTPUT_LABEL (asm_out_file
, l2
);
1801 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1802 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file
, ld
, l2
, l1
);
1804 fprintf (asm_out_file
, "\t%s CIE Length Symbol", ASM_COMMENT_START
);
1805 fputc ('\n', asm_out_file
);
1808 /* Loop through all of the FDE's. */
1809 for (i
= 0; i
< fde_table_in_use
; ++i
)
1811 fde
= &fde_table
[i
];
1813 ASM_GENERATE_INTERNAL_LABEL (l1
, FDE_AFTER_SIZE_LABEL
, for_eh
+ i
*2);
1814 ASM_GENERATE_INTERNAL_LABEL (l2
, FDE_END_LABEL
, for_eh
+ i
*2);
1815 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1816 ASM_GENERATE_INTERNAL_LABEL (ld
, FDE_LENGTH_LABEL
, for_eh
+ i
*2);
1818 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file
, ld
);
1820 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, ld
);
1823 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l2
, l1
);
1825 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l2
, l1
);
1828 fprintf (asm_out_file
, "\t%s FDE Length", ASM_COMMENT_START
);
1829 fputc ('\n', asm_out_file
);
1830 ASM_OUTPUT_LABEL (asm_out_file
, l1
);
1833 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l1
, "__FRAME_BEGIN__");
1835 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (FRAME_SECTION
));
1837 fprintf (asm_out_file
, "\t%s FDE CIE offset", ASM_COMMENT_START
);
1839 fputc ('\n', asm_out_file
);
1840 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, fde
->dw_fde_begin
);
1842 fprintf (asm_out_file
, "\t%s FDE initial location", ASM_COMMENT_START
);
1844 fputc ('\n', asm_out_file
);
1845 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
,
1846 fde
->dw_fde_end
, fde
->dw_fde_begin
);
1848 fprintf (asm_out_file
, "\t%s FDE address range", ASM_COMMENT_START
);
1850 fputc ('\n', asm_out_file
);
1852 /* Loop through the Call Frame Instructions associated with
1854 fde
->dw_fde_current_label
= fde
->dw_fde_begin
;
1855 for (cfi
= fde
->dw_fde_cfi
; cfi
!= NULL
; cfi
= cfi
->dw_cfi_next
)
1856 output_cfi (cfi
, fde
);
1858 /* Pad the FDE out to an address sized boundary. */
1859 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1860 ASM_OUTPUT_LABEL (asm_out_file
, l2
);
1861 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1862 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file
, ld
, l2
, l1
);
1864 fprintf (asm_out_file
, "\t%s FDE Length Symbol", ASM_COMMENT_START
);
1865 fputc ('\n', asm_out_file
);
1868 #ifndef EH_FRAME_SECTION
1871 /* Emit terminating zero for table. */
1872 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 0);
1873 fputc ('\n', asm_out_file
);
1876 #ifdef MIPS_DEBUGGING_INFO
1877 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1878 get a value of 0. Putting .align 0 after the label fixes it. */
1879 ASM_OUTPUT_ALIGN (asm_out_file
, 0);
1882 /* Turn off app to make assembly quicker. */
1887 /* Output a marker (i.e. a label) for the beginning of a function, before
1891 dwarf2out_begin_prologue ()
1893 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
1894 register dw_fde_ref fde
;
1896 ++current_funcdef_number
;
1898 function_section (current_function_decl
);
1899 ASM_GENERATE_INTERNAL_LABEL (label
, FUNC_BEGIN_LABEL
,
1900 current_funcdef_number
);
1901 ASM_OUTPUT_LABEL (asm_out_file
, label
);
1903 /* Expand the fde table if necessary. */
1904 if (fde_table_in_use
== fde_table_allocated
)
1906 fde_table_allocated
+= FDE_TABLE_INCREMENT
;
1908 = (dw_fde_ref
) xrealloc (fde_table
,
1909 fde_table_allocated
* sizeof (dw_fde_node
));
1912 /* Record the FDE associated with this function. */
1913 current_funcdef_fde
= fde_table_in_use
;
1915 /* Add the new FDE at the end of the fde_table. */
1916 fde
= &fde_table
[fde_table_in_use
++];
1917 fde
->dw_fde_begin
= xstrdup (label
);
1918 fde
->dw_fde_current_label
= NULL
;
1919 fde
->dw_fde_end
= NULL
;
1920 fde
->dw_fde_cfi
= NULL
;
1922 args_size
= old_args_size
= 0;
1925 /* Output a marker (i.e. a label) for the absolute end of the generated code
1926 for a function definition. This gets called *after* the epilogue code has
1930 dwarf2out_end_epilogue ()
1933 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
1935 /* Output a label to mark the endpoint of the code generated for this
1937 ASM_GENERATE_INTERNAL_LABEL (label
, FUNC_END_LABEL
, current_funcdef_number
);
1938 ASM_OUTPUT_LABEL (asm_out_file
, label
);
1939 fde
= &fde_table
[fde_table_in_use
- 1];
1940 fde
->dw_fde_end
= xstrdup (label
);
1944 dwarf2out_frame_init ()
1946 /* Allocate the initial hunk of the fde_table. */
1948 = (dw_fde_ref
) xmalloc (FDE_TABLE_INCREMENT
* sizeof (dw_fde_node
));
1949 bzero ((char *) fde_table
, FDE_TABLE_INCREMENT
* sizeof (dw_fde_node
));
1950 fde_table_allocated
= FDE_TABLE_INCREMENT
;
1951 fde_table_in_use
= 0;
1953 /* Generate the CFA instructions common to all FDE's. Do it now for the
1954 sake of lookup_cfa. */
1956 #ifdef DWARF2_UNWIND_INFO
1957 /* On entry, the Canonical Frame Address is at SP. */
1958 dwarf2out_def_cfa (NULL
, STACK_POINTER_REGNUM
, INCOMING_FRAME_SP_OFFSET
);
1959 initial_return_save (INCOMING_RETURN_ADDR_RTX
);
1964 dwarf2out_frame_finish ()
1966 /* Output call frame information. */
1967 #ifdef MIPS_DEBUGGING_INFO
1968 if (write_symbols
== DWARF2_DEBUG
)
1969 output_call_frame_info (0);
1970 if (flag_exceptions
&& ! exceptions_via_longjmp
)
1971 output_call_frame_info (1);
1973 if (write_symbols
== DWARF2_DEBUG
1974 || (flag_exceptions
&& ! exceptions_via_longjmp
))
1975 output_call_frame_info (1);
1979 #endif /* .debug_frame support */
1981 /* And now, the support for symbolic debugging information. */
1982 #ifdef DWARF2_DEBUGGING_INFO
1984 extern char *getpwd
PROTO((void));
1986 /* NOTE: In the comments in this file, many references are made to
1987 "Debugging Information Entries". This term is abbreviated as `DIE'
1988 throughout the remainder of this file. */
1990 /* An internal representation of the DWARF output is built, and then
1991 walked to generate the DWARF debugging info. The walk of the internal
1992 representation is done after the entire program has been compiled.
1993 The types below are used to describe the internal representation. */
1995 /* Each DIE may have a series of attribute/value pairs. Values
1996 can take on several forms. The forms that are used in this
1997 implementation are listed below. */
2004 dw_val_class_unsigned_const
,
2005 dw_val_class_long_long
,
2008 dw_val_class_die_ref
,
2009 dw_val_class_fde_ref
,
2010 dw_val_class_lbl_id
,
2011 dw_val_class_section_offset
,
2016 /* Various DIE's use offsets relative to the beginning of the
2017 .debug_info section to refer to each other. */
2019 typedef long int dw_offset
;
2021 /* Define typedefs here to avoid circular dependencies. */
2023 typedef struct die_struct
*dw_die_ref
;
2024 typedef struct dw_attr_struct
*dw_attr_ref
;
2025 typedef struct dw_val_struct
*dw_val_ref
;
2026 typedef struct dw_line_info_struct
*dw_line_info_ref
;
2027 typedef struct dw_separate_line_info_struct
*dw_separate_line_info_ref
;
2028 typedef struct dw_loc_descr_struct
*dw_loc_descr_ref
;
2029 typedef struct pubname_struct
*pubname_ref
;
2030 typedef dw_die_ref
*arange_ref
;
2032 /* Describe a double word constant value. */
2034 typedef struct dw_long_long_struct
2041 /* Describe a floating point constant value. */
2043 typedef struct dw_fp_struct
2050 /* Each entry in the line_info_table maintains the file and
2051 line number associated with the label generated for that
2052 entry. The label gives the PC value associated with
2053 the line number entry. */
2055 typedef struct dw_line_info_struct
2057 unsigned long dw_file_num
;
2058 unsigned long dw_line_num
;
2062 /* Line information for functions in separate sections; each one gets its
2064 typedef struct dw_separate_line_info_struct
2066 unsigned long dw_file_num
;
2067 unsigned long dw_line_num
;
2068 unsigned long function
;
2070 dw_separate_line_info_entry
;
2072 /* The dw_val_node describes an attribute's value, as it is
2073 represented internally. */
2075 typedef struct dw_val_struct
2077 dw_val_class val_class
;
2081 dw_loc_descr_ref val_loc
;
2083 long unsigned val_unsigned
;
2084 dw_long_long_const val_long_long
;
2085 dw_float_const val_float
;
2086 dw_die_ref val_die_ref
;
2087 unsigned val_fde_index
;
2091 unsigned char val_flag
;
2097 /* Locations in memory are described using a sequence of stack machine
2100 typedef struct dw_loc_descr_struct
2102 dw_loc_descr_ref dw_loc_next
;
2103 enum dwarf_location_atom dw_loc_opc
;
2104 dw_val_node dw_loc_oprnd1
;
2105 dw_val_node dw_loc_oprnd2
;
2109 /* Each DIE attribute has a field specifying the attribute kind,
2110 a link to the next attribute in the chain, and an attribute value.
2111 Attributes are typically linked below the DIE they modify. */
2113 typedef struct dw_attr_struct
2115 enum dwarf_attribute dw_attr
;
2116 dw_attr_ref dw_attr_next
;
2117 dw_val_node dw_attr_val
;
2121 /* The Debugging Information Entry (DIE) structure */
2123 typedef struct die_struct
2125 enum dwarf_tag die_tag
;
2126 dw_attr_ref die_attr
;
2127 dw_attr_ref die_attr_last
;
2128 dw_die_ref die_parent
;
2129 dw_die_ref die_child
;
2130 dw_die_ref die_child_last
;
2132 dw_offset die_offset
;
2133 unsigned long die_abbrev
;
2137 /* The pubname structure */
2139 typedef struct pubname_struct
2146 /* The limbo die list structure. */
2147 typedef struct limbo_die_struct
2150 struct limbo_die_struct
*next
;
2154 /* How to start an assembler comment. */
2155 #ifndef ASM_COMMENT_START
2156 #define ASM_COMMENT_START ";#"
2159 /* Define a macro which returns non-zero for a TYPE_DECL which was
2160 implicitly generated for a tagged type.
2162 Note that unlike the gcc front end (which generates a NULL named
2163 TYPE_DECL node for each complete tagged type, each array type, and
2164 each function type node created) the g++ front end generates a
2165 _named_ TYPE_DECL node for each tagged type node created.
2166 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2167 generate a DW_TAG_typedef DIE for them. */
2169 #define TYPE_DECL_IS_STUB(decl) \
2170 (DECL_NAME (decl) == NULL_TREE \
2171 || (DECL_ARTIFICIAL (decl) \
2172 && is_tagged_type (TREE_TYPE (decl)) \
2173 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2174 /* This is necessary for stub decls that \
2175 appear in nested inline functions. */ \
2176 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2177 && (decl_ultimate_origin (decl) \
2178 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2180 /* Information concerning the compilation unit's programming
2181 language, and compiler version. */
2183 extern int flag_traditional
;
2184 extern char *version_string
;
2185 extern char *language_string
;
2187 /* Fixed size portion of the DWARF compilation unit header. */
2188 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2190 /* Fixed size portion of debugging line information prolog. */
2191 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2193 /* Fixed size portion of public names info. */
2194 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2196 /* Fixed size portion of the address range info. */
2197 #define DWARF_ARANGES_HEADER_SIZE \
2198 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2200 /* Define the architecture-dependent minimum instruction length (in bytes).
2201 In this implementation of DWARF, this field is used for information
2202 purposes only. Since GCC generates assembly language, we have
2203 no a priori knowledge of how many instruction bytes are generated
2204 for each source line, and therefore can use only the DW_LNE_set_address
2205 and DW_LNS_fixed_advance_pc line information commands. */
2207 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2208 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2211 /* Minimum line offset in a special line info. opcode.
2212 This value was chosen to give a reasonable range of values. */
2213 #define DWARF_LINE_BASE -10
2215 /* First special line opcde - leave room for the standard opcodes. */
2216 #define DWARF_LINE_OPCODE_BASE 10
2218 /* Range of line offsets in a special line info. opcode. */
2219 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2221 /* Flag that indicates the initial value of the is_stmt_start flag.
2222 In the present implementation, we do not mark any lines as
2223 the beginning of a source statement, because that information
2224 is not made available by the GCC front-end. */
2225 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2227 /* This location is used by calc_die_sizes() to keep track
2228 the offset of each DIE within the .debug_info section. */
2229 static unsigned long next_die_offset
;
2231 /* Record the root of the DIE's built for the current compilation unit. */
2232 static dw_die_ref comp_unit_die
;
2234 /* A list of DIEs with a NULL parent waiting to be relocated. */
2235 static limbo_die_node
*limbo_die_list
= 0;
2237 /* Pointer to an array of filenames referenced by this compilation unit. */
2238 static char **file_table
;
2240 /* Total number of entries in the table (i.e. array) pointed to by
2241 `file_table'. This is the *total* and includes both used and unused
2243 static unsigned file_table_allocated
;
2245 /* Number of entries in the file_table which are actually in use. */
2246 static unsigned file_table_in_use
;
2248 /* Size (in elements) of increments by which we may expand the filename
2250 #define FILE_TABLE_INCREMENT 64
2252 /* Local pointer to the name of the main input file. Initialized in
2254 static char *primary_filename
;
2256 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2257 which their beginnings are encountered. We output Dwarf debugging info
2258 that refers to the beginnings and ends of the ranges of code for each
2259 lexical block. The labels themselves are generated in final.c, which
2260 assigns numbers to the blocks in the same way. */
2261 static unsigned next_block_number
= 2;
2263 /* A pointer to the base of a table of references to DIE's that describe
2264 declarations. The table is indexed by DECL_UID() which is a unique
2265 number identifying each decl. */
2266 static dw_die_ref
*decl_die_table
;
2268 /* Number of elements currently allocated for the decl_die_table. */
2269 static unsigned decl_die_table_allocated
;
2271 /* Number of elements in decl_die_table currently in use. */
2272 static unsigned decl_die_table_in_use
;
2274 /* Size (in elements) of increments by which we may expand the
2276 #define DECL_DIE_TABLE_INCREMENT 256
2278 /* Structure used for the decl_scope table. scope is the current declaration
2279 scope, and previous is the entry that is the parent of this scope. This
2280 is usually but not always the immediately preceeding entry. */
2282 typedef struct decl_scope_struct
2289 /* A pointer to the base of a table of references to declaration
2290 scopes. This table is a display which tracks the nesting
2291 of declaration scopes at the current scope and containing
2292 scopes. This table is used to find the proper place to
2293 define type declaration DIE's. */
2294 static decl_scope_node
*decl_scope_table
;
2296 /* Number of elements currently allocated for the decl_scope_table. */
2297 static int decl_scope_table_allocated
;
2299 /* Current level of nesting of declaration scopes. */
2300 static int decl_scope_depth
;
2302 /* Size (in elements) of increments by which we may expand the
2303 decl_scope_table. */
2304 #define DECL_SCOPE_TABLE_INCREMENT 64
2306 /* A pointer to the base of a list of references to DIE's that
2307 are uniquely identified by their tag, presence/absence of
2308 children DIE's, and list of attribute/value pairs. */
2309 static dw_die_ref
*abbrev_die_table
;
2311 /* Number of elements currently allocated for abbrev_die_table. */
2312 static unsigned abbrev_die_table_allocated
;
2314 /* Number of elements in type_die_table currently in use. */
2315 static unsigned abbrev_die_table_in_use
;
2317 /* Size (in elements) of increments by which we may expand the
2318 abbrev_die_table. */
2319 #define ABBREV_DIE_TABLE_INCREMENT 256
2321 /* A pointer to the base of a table that contains line information
2322 for each source code line in .text in the compilation unit. */
2323 static dw_line_info_ref line_info_table
;
2325 /* Number of elements currently allocated for line_info_table. */
2326 static unsigned line_info_table_allocated
;
2328 /* Number of elements in separate_line_info_table currently in use. */
2329 static unsigned separate_line_info_table_in_use
;
2331 /* A pointer to the base of a table that contains line information
2332 for each source code line outside of .text in the compilation unit. */
2333 static dw_separate_line_info_ref separate_line_info_table
;
2335 /* Number of elements currently allocated for separate_line_info_table. */
2336 static unsigned separate_line_info_table_allocated
;
2338 /* Number of elements in line_info_table currently in use. */
2339 static unsigned line_info_table_in_use
;
2341 /* Size (in elements) of increments by which we may expand the
2343 #define LINE_INFO_TABLE_INCREMENT 1024
2345 /* A pointer to the base of a table that contains a list of publicly
2346 accessible names. */
2347 static pubname_ref pubname_table
;
2349 /* Number of elements currently allocated for pubname_table. */
2350 static unsigned pubname_table_allocated
;
2352 /* Number of elements in pubname_table currently in use. */
2353 static unsigned pubname_table_in_use
;
2355 /* Size (in elements) of increments by which we may expand the
2357 #define PUBNAME_TABLE_INCREMENT 64
2359 /* A pointer to the base of a table that contains a list of publicly
2360 accessible names. */
2361 static arange_ref arange_table
;
2363 /* Number of elements currently allocated for arange_table. */
2364 static unsigned arange_table_allocated
;
2366 /* Number of elements in arange_table currently in use. */
2367 static unsigned arange_table_in_use
;
2369 /* Size (in elements) of increments by which we may expand the
2371 #define ARANGE_TABLE_INCREMENT 64
2373 /* A pointer to the base of a list of pending types which we haven't
2374 generated DIEs for yet, but which we will have to come back to
2377 static tree
*pending_types_list
;
2379 /* Number of elements currently allocated for the pending_types_list. */
2380 static unsigned pending_types_allocated
;
2382 /* Number of elements of pending_types_list currently in use. */
2383 static unsigned pending_types
;
2385 /* Size (in elements) of increments by which we may expand the pending
2386 types list. Actually, a single hunk of space of this size should
2387 be enough for most typical programs. */
2388 #define PENDING_TYPES_INCREMENT 64
2390 /* Record whether the function being analyzed contains inlined functions. */
2391 static int current_function_has_inlines
;
2392 #if 0 && defined (MIPS_DEBUGGING_INFO)
2393 static int comp_unit_has_inlines
;
2396 /* A pointer to the ..._DECL node which we have most recently been working
2397 on. We keep this around just in case something about it looks screwy and
2398 we want to tell the user what the source coordinates for the actual
2400 static tree dwarf_last_decl
;
2402 /* Forward declarations for functions defined in this file. */
2404 static void addr_const_to_string
PROTO((dyn_string_t
, rtx
));
2405 static char *addr_to_string
PROTO((rtx
));
2406 static int is_pseudo_reg
PROTO((rtx
));
2407 static tree type_main_variant
PROTO((tree
));
2408 static int is_tagged_type
PROTO((tree
));
2409 static char *dwarf_tag_name
PROTO((unsigned));
2410 static char *dwarf_attr_name
PROTO((unsigned));
2411 static char *dwarf_form_name
PROTO((unsigned));
2412 static char *dwarf_stack_op_name
PROTO((unsigned));
2414 static char *dwarf_type_encoding_name
PROTO((unsigned));
2416 static tree decl_ultimate_origin
PROTO((tree
));
2417 static tree block_ultimate_origin
PROTO((tree
));
2418 static tree decl_class_context
PROTO((tree
));
2419 static void add_dwarf_attr
PROTO((dw_die_ref
, dw_attr_ref
));
2420 static void add_AT_flag
PROTO((dw_die_ref
,
2421 enum dwarf_attribute
,
2423 static void add_AT_int
PROTO((dw_die_ref
,
2424 enum dwarf_attribute
, long));
2425 static void add_AT_unsigned
PROTO((dw_die_ref
,
2426 enum dwarf_attribute
,
2428 static void add_AT_long_long
PROTO((dw_die_ref
,
2429 enum dwarf_attribute
,
2430 unsigned long, unsigned long));
2431 static void add_AT_float
PROTO((dw_die_ref
,
2432 enum dwarf_attribute
,
2434 static void add_AT_string
PROTO((dw_die_ref
,
2435 enum dwarf_attribute
, char *));
2436 static void add_AT_die_ref
PROTO((dw_die_ref
,
2437 enum dwarf_attribute
,
2439 static void add_AT_fde_ref
PROTO((dw_die_ref
,
2440 enum dwarf_attribute
,
2442 static void add_AT_loc
PROTO((dw_die_ref
,
2443 enum dwarf_attribute
,
2445 static void add_AT_addr
PROTO((dw_die_ref
,
2446 enum dwarf_attribute
, char *));
2447 static void add_AT_lbl_id
PROTO((dw_die_ref
,
2448 enum dwarf_attribute
, char *));
2449 static void add_AT_section_offset
PROTO((dw_die_ref
,
2450 enum dwarf_attribute
, char *));
2451 static int is_extern_subr_die
PROTO((dw_die_ref
));
2452 static dw_attr_ref get_AT
PROTO((dw_die_ref
,
2453 enum dwarf_attribute
));
2454 static char *get_AT_low_pc
PROTO((dw_die_ref
));
2455 static char *get_AT_hi_pc
PROTO((dw_die_ref
));
2456 static char *get_AT_string
PROTO((dw_die_ref
,
2457 enum dwarf_attribute
));
2458 static int get_AT_flag
PROTO((dw_die_ref
,
2459 enum dwarf_attribute
));
2460 static unsigned get_AT_unsigned
PROTO((dw_die_ref
,
2461 enum dwarf_attribute
));
2462 static int is_c_family
PROTO((void));
2463 static int is_fortran
PROTO((void));
2464 static void remove_AT
PROTO((dw_die_ref
,
2465 enum dwarf_attribute
));
2466 static void remove_children
PROTO((dw_die_ref
));
2467 static void add_child_die
PROTO((dw_die_ref
, dw_die_ref
));
2468 static dw_die_ref new_die
PROTO((enum dwarf_tag
, dw_die_ref
));
2469 static dw_die_ref lookup_type_die
PROTO((tree
));
2470 static void equate_type_number_to_die
PROTO((tree
, dw_die_ref
));
2471 static dw_die_ref lookup_decl_die
PROTO((tree
));
2472 static void equate_decl_number_to_die
PROTO((tree
, dw_die_ref
));
2473 static dw_loc_descr_ref new_loc_descr
PROTO((enum dwarf_location_atom
,
2474 unsigned long, unsigned long));
2475 static void add_loc_descr
PROTO((dw_loc_descr_ref
*,
2477 static void print_spaces
PROTO((FILE *));
2478 static void print_die
PROTO((dw_die_ref
, FILE *));
2479 static void print_dwarf_line_table
PROTO((FILE *));
2480 static void add_sibling_attributes
PROTO((dw_die_ref
));
2481 static void build_abbrev_table
PROTO((dw_die_ref
));
2482 static unsigned long size_of_string
PROTO((char *));
2483 static unsigned long size_of_loc_descr
PROTO((dw_loc_descr_ref
));
2484 static unsigned long size_of_locs
PROTO((dw_loc_descr_ref
));
2485 static int constant_size
PROTO((long unsigned));
2486 static unsigned long size_of_die
PROTO((dw_die_ref
));
2487 static void calc_die_sizes
PROTO((dw_die_ref
));
2488 static unsigned long size_of_line_prolog
PROTO((void));
2489 static unsigned long size_of_line_info
PROTO((void));
2490 static unsigned long size_of_pubnames
PROTO((void));
2491 static unsigned long size_of_aranges
PROTO((void));
2492 static enum dwarf_form value_format
PROTO((dw_val_ref
));
2493 static void output_value_format
PROTO((dw_val_ref
));
2494 static void output_abbrev_section
PROTO((void));
2495 static void output_loc_operands
PROTO((dw_loc_descr_ref
));
2496 static unsigned long sibling_offset
PROTO((dw_die_ref
));
2497 static void output_die
PROTO((dw_die_ref
));
2498 static void output_compilation_unit_header
PROTO((void));
2499 static char *dwarf2_name
PROTO((tree
, int));
2500 static void add_pubname
PROTO((tree
, dw_die_ref
));
2501 static void output_pubnames
PROTO((void));
2502 static void add_arange
PROTO((tree
, dw_die_ref
));
2503 static void output_aranges
PROTO((void));
2504 static void output_line_info
PROTO((void));
2505 static int is_body_block
PROTO((tree
));
2506 static dw_die_ref base_type_die
PROTO((tree
));
2507 static tree root_type
PROTO((tree
));
2508 static int is_base_type
PROTO((tree
));
2509 static dw_die_ref modified_type_die
PROTO((tree
, int, int, dw_die_ref
));
2510 static int type_is_enum
PROTO((tree
));
2511 static dw_loc_descr_ref reg_loc_descriptor
PROTO((rtx
));
2512 static dw_loc_descr_ref based_loc_descr
PROTO((unsigned, long));
2513 static int is_based_loc
PROTO((rtx
));
2514 static dw_loc_descr_ref mem_loc_descriptor
PROTO((rtx
));
2515 static dw_loc_descr_ref concat_loc_descriptor
PROTO((rtx
, rtx
));
2516 static dw_loc_descr_ref loc_descriptor
PROTO((rtx
));
2517 static unsigned ceiling
PROTO((unsigned, unsigned));
2518 static tree field_type
PROTO((tree
));
2519 static unsigned simple_type_align_in_bits
PROTO((tree
));
2520 static unsigned simple_type_size_in_bits
PROTO((tree
));
2521 static unsigned field_byte_offset
PROTO((tree
));
2522 static void add_AT_location_description
PROTO((dw_die_ref
,
2523 enum dwarf_attribute
, rtx
));
2524 static void add_data_member_location_attribute
PROTO((dw_die_ref
, tree
));
2525 static void add_const_value_attribute
PROTO((dw_die_ref
, rtx
));
2526 static void add_location_or_const_value_attribute
PROTO((dw_die_ref
, tree
));
2527 static void add_name_attribute
PROTO((dw_die_ref
, char *));
2528 static void add_bound_info
PROTO((dw_die_ref
,
2529 enum dwarf_attribute
, tree
));
2530 static void add_subscript_info
PROTO((dw_die_ref
, tree
));
2531 static void add_byte_size_attribute
PROTO((dw_die_ref
, tree
));
2532 static void add_bit_offset_attribute
PROTO((dw_die_ref
, tree
));
2533 static void add_bit_size_attribute
PROTO((dw_die_ref
, tree
));
2534 static void add_prototyped_attribute
PROTO((dw_die_ref
, tree
));
2535 static void add_abstract_origin_attribute
PROTO((dw_die_ref
, tree
));
2536 static void add_pure_or_virtual_attribute
PROTO((dw_die_ref
, tree
));
2537 static void add_src_coords_attributes
PROTO((dw_die_ref
, tree
));
2538 static void add_name_and_src_coords_attributes
PROTO((dw_die_ref
, tree
));
2539 static void push_decl_scope
PROTO((tree
));
2540 static dw_die_ref scope_die_for
PROTO((tree
, dw_die_ref
));
2541 static void pop_decl_scope
PROTO((void));
2542 static void add_type_attribute
PROTO((dw_die_ref
, tree
, int, int,
2544 static char *type_tag
PROTO((tree
));
2545 static tree member_declared_type
PROTO((tree
));
2547 static char *decl_start_label
PROTO((tree
));
2549 static void gen_array_type_die
PROTO((tree
, dw_die_ref
));
2550 static void gen_set_type_die
PROTO((tree
, dw_die_ref
));
2552 static void gen_entry_point_die
PROTO((tree
, dw_die_ref
));
2554 static void pend_type
PROTO((tree
));
2555 static void output_pending_types_for_scope
PROTO((dw_die_ref
));
2556 static void gen_inlined_enumeration_type_die
PROTO((tree
, dw_die_ref
));
2557 static void gen_inlined_structure_type_die
PROTO((tree
, dw_die_ref
));
2558 static void gen_inlined_union_type_die
PROTO((tree
, dw_die_ref
));
2559 static void gen_enumeration_type_die
PROTO((tree
, dw_die_ref
));
2560 static dw_die_ref gen_formal_parameter_die
PROTO((tree
, dw_die_ref
));
2561 static void gen_unspecified_parameters_die
PROTO((tree
, dw_die_ref
));
2562 static void gen_formal_types_die
PROTO((tree
, dw_die_ref
));
2563 static void gen_subprogram_die
PROTO((tree
, dw_die_ref
));
2564 static void gen_variable_die
PROTO((tree
, dw_die_ref
));
2565 static void gen_label_die
PROTO((tree
, dw_die_ref
));
2566 static void gen_lexical_block_die
PROTO((tree
, dw_die_ref
, int));
2567 static void gen_inlined_subroutine_die
PROTO((tree
, dw_die_ref
, int));
2568 static void gen_field_die
PROTO((tree
, dw_die_ref
));
2569 static void gen_ptr_to_mbr_type_die
PROTO((tree
, dw_die_ref
));
2570 static void gen_compile_unit_die
PROTO((char *));
2571 static void gen_string_type_die
PROTO((tree
, dw_die_ref
));
2572 static void gen_inheritance_die
PROTO((tree
, dw_die_ref
));
2573 static void gen_member_die
PROTO((tree
, dw_die_ref
));
2574 static void gen_struct_or_union_type_die
PROTO((tree
, dw_die_ref
));
2575 static void gen_subroutine_type_die
PROTO((tree
, dw_die_ref
));
2576 static void gen_typedef_die
PROTO((tree
, dw_die_ref
));
2577 static void gen_type_die
PROTO((tree
, dw_die_ref
));
2578 static void gen_tagged_type_instantiation_die
PROTO((tree
, dw_die_ref
));
2579 static void gen_block_die
PROTO((tree
, dw_die_ref
, int));
2580 static void decls_for_scope
PROTO((tree
, dw_die_ref
, int));
2581 static int is_redundant_typedef
PROTO((tree
));
2582 static void gen_decl_die
PROTO((tree
, dw_die_ref
));
2583 static unsigned lookup_filename
PROTO((char *));
2585 /* Section names used to hold DWARF debugging information. */
2586 #ifndef DEBUG_INFO_SECTION
2587 #define DEBUG_INFO_SECTION ".debug_info"
2589 #ifndef ABBREV_SECTION
2590 #define ABBREV_SECTION ".debug_abbrev"
2592 #ifndef ARANGES_SECTION
2593 #define ARANGES_SECTION ".debug_aranges"
2595 #ifndef DW_MACINFO_SECTION
2596 #define DW_MACINFO_SECTION ".debug_macinfo"
2598 #ifndef DEBUG_LINE_SECTION
2599 #define DEBUG_LINE_SECTION ".debug_line"
2602 #define LOC_SECTION ".debug_loc"
2604 #ifndef PUBNAMES_SECTION
2605 #define PUBNAMES_SECTION ".debug_pubnames"
2608 #define STR_SECTION ".debug_str"
2611 /* Standard ELF section names for compiled code and data. */
2612 #ifndef TEXT_SECTION
2613 #define TEXT_SECTION ".text"
2615 #ifndef DATA_SECTION
2616 #define DATA_SECTION ".data"
2619 #define BSS_SECTION ".bss"
2623 /* Definitions of defaults for formats and names of various special
2624 (artificial) labels which may be generated within this file (when the -g
2625 options is used and DWARF_DEBUGGING_INFO is in effect.
2626 If necessary, these may be overridden from within the tm.h file, but
2627 typically, overriding these defaults is unnecessary. */
2629 static char text_end_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
2631 #ifndef TEXT_END_LABEL
2632 #define TEXT_END_LABEL "Letext"
2634 #ifndef DATA_END_LABEL
2635 #define DATA_END_LABEL "Ledata"
2637 #ifndef BSS_END_LABEL
2638 #define BSS_END_LABEL "Lebss"
2640 #ifndef INSN_LABEL_FMT
2641 #define INSN_LABEL_FMT "LI%u_"
2643 #ifndef BLOCK_BEGIN_LABEL
2644 #define BLOCK_BEGIN_LABEL "LBB"
2646 #ifndef BLOCK_END_LABEL
2647 #define BLOCK_END_LABEL "LBE"
2649 #ifndef BODY_BEGIN_LABEL
2650 #define BODY_BEGIN_LABEL "Lbb"
2652 #ifndef BODY_END_LABEL
2653 #define BODY_END_LABEL "Lbe"
2655 #ifndef LINE_CODE_LABEL
2656 #define LINE_CODE_LABEL "LM"
2658 #ifndef SEPARATE_LINE_CODE_LABEL
2659 #define SEPARATE_LINE_CODE_LABEL "LSM"
2662 /* Convert a reference to the assembler name of a C-level name. This
2663 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2664 a string rather than writing to a file. */
2665 #ifndef ASM_NAME_TO_STRING
2666 #define ASM_NAME_TO_STRING(STR, NAME) \
2668 if ((NAME)[0] == '*') \
2669 dyn_string_append (STR, NAME + 1); \
2671 dyn_string_append (STR, NAME); \
2676 /* Convert an integer constant expression into assembler syntax. Addition
2677 and subtraction are the only arithmetic that may appear in these
2678 expressions. This is an adaptation of output_addr_const in final.c.
2679 Here, the target of the conversion is a string buffer. We can't use
2680 output_addr_const directly, because it writes to a file. */
2683 addr_const_to_string (str
, x
)
2690 switch (GET_CODE (x
))
2694 dyn_string_append (str
, ",");
2700 ASM_NAME_TO_STRING (str
, XSTR (x
, 0));
2704 ASM_GENERATE_INTERNAL_LABEL (buf1
, "L", CODE_LABEL_NUMBER (XEXP (x
, 0)));
2705 ASM_NAME_TO_STRING (str
, buf1
);
2709 ASM_GENERATE_INTERNAL_LABEL (buf1
, "L", CODE_LABEL_NUMBER (x
));
2710 ASM_NAME_TO_STRING (str
, buf1
);
2714 sprintf (buf1
, HOST_WIDE_INT_PRINT_DEC
, INTVAL (x
));
2715 dyn_string_append (str
, buf1
);
2719 /* This used to output parentheses around the expression, but that does
2720 not work on the 386 (either ATT or BSD assembler). */
2721 addr_const_to_string (str
, XEXP (x
, 0));
2725 if (GET_MODE (x
) == VOIDmode
)
2727 /* We can use %d if the number is one word and positive. */
2728 if (CONST_DOUBLE_HIGH (x
))
2729 sprintf (buf1
, HOST_WIDE_INT_PRINT_DOUBLE_HEX
,
2730 CONST_DOUBLE_HIGH (x
), CONST_DOUBLE_LOW (x
));
2731 else if (CONST_DOUBLE_LOW (x
) < 0)
2732 sprintf (buf1
, HOST_WIDE_INT_PRINT_HEX
, CONST_DOUBLE_LOW (x
));
2734 sprintf (buf1
, HOST_WIDE_INT_PRINT_DEC
,
2735 CONST_DOUBLE_LOW (x
));
2736 dyn_string_append (str
, buf1
);
2739 /* We can't handle floating point constants; PRINT_OPERAND must
2741 output_operand_lossage ("floating constant misused");
2745 /* Some assemblers need integer constants to appear last (eg masm). */
2746 if (GET_CODE (XEXP (x
, 0)) == CONST_INT
)
2748 addr_const_to_string (str
, XEXP (x
, 1));
2749 if (INTVAL (XEXP (x
, 0)) >= 0)
2750 dyn_string_append (str
, "+");
2752 addr_const_to_string (str
, XEXP (x
, 0));
2756 addr_const_to_string (str
, XEXP (x
, 0));
2757 if (INTVAL (XEXP (x
, 1)) >= 0)
2758 dyn_string_append (str
, "+");
2760 addr_const_to_string (str
, XEXP (x
, 1));
2765 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2766 can't handle that. */
2767 x
= simplify_subtraction (x
);
2768 if (GET_CODE (x
) != MINUS
)
2771 addr_const_to_string (str
, XEXP (x
, 0));
2772 dyn_string_append (str
, "-");
2773 if (GET_CODE (XEXP (x
, 1)) == CONST_INT
2774 && INTVAL (XEXP (x
, 1)) < 0)
2776 dyn_string_append (str
, ASM_OPEN_PAREN
);
2777 addr_const_to_string (str
, XEXP (x
, 1));
2778 dyn_string_append (str
, ASM_CLOSE_PAREN
);
2781 addr_const_to_string (str
, XEXP (x
, 1));
2786 addr_const_to_string (str
, XEXP (x
, 0));
2790 output_operand_lossage ("invalid expression as operand");
2794 /* Convert an address constant to a string, and return a pointer to
2795 a copy of the result, located on the heap. */
2801 dyn_string_t ds
= dyn_string_new (256);
2804 addr_const_to_string (ds
, x
);
2806 /* Return the dynamically allocated string, but free the
2807 dyn_string_t itself. */
2813 /* Test if rtl node points to a pseudo register. */
2819 return (((GET_CODE (rtl
) == REG
) && (REGNO (rtl
) >= FIRST_PSEUDO_REGISTER
))
2820 || ((GET_CODE (rtl
) == SUBREG
)
2821 && (REGNO (XEXP (rtl
, 0)) >= FIRST_PSEUDO_REGISTER
)));
2824 /* Return a reference to a type, with its const and volatile qualifiers
2828 type_main_variant (type
)
2831 type
= TYPE_MAIN_VARIANT (type
);
2833 /* There really should be only one main variant among any group of variants
2834 of a given type (and all of the MAIN_VARIANT values for all members of
2835 the group should point to that one type) but sometimes the C front-end
2836 messes this up for array types, so we work around that bug here. */
2838 if (TREE_CODE (type
) == ARRAY_TYPE
)
2839 while (type
!= TYPE_MAIN_VARIANT (type
))
2840 type
= TYPE_MAIN_VARIANT (type
);
2845 /* Return non-zero if the given type node represents a tagged type. */
2848 is_tagged_type (type
)
2851 register enum tree_code code
= TREE_CODE (type
);
2853 return (code
== RECORD_TYPE
|| code
== UNION_TYPE
2854 || code
== QUAL_UNION_TYPE
|| code
== ENUMERAL_TYPE
);
2857 /* Convert a DIE tag into its string name. */
2860 dwarf_tag_name (tag
)
2861 register unsigned tag
;
2865 case DW_TAG_padding
:
2866 return "DW_TAG_padding";
2867 case DW_TAG_array_type
:
2868 return "DW_TAG_array_type";
2869 case DW_TAG_class_type
:
2870 return "DW_TAG_class_type";
2871 case DW_TAG_entry_point
:
2872 return "DW_TAG_entry_point";
2873 case DW_TAG_enumeration_type
:
2874 return "DW_TAG_enumeration_type";
2875 case DW_TAG_formal_parameter
:
2876 return "DW_TAG_formal_parameter";
2877 case DW_TAG_imported_declaration
:
2878 return "DW_TAG_imported_declaration";
2880 return "DW_TAG_label";
2881 case DW_TAG_lexical_block
:
2882 return "DW_TAG_lexical_block";
2884 return "DW_TAG_member";
2885 case DW_TAG_pointer_type
:
2886 return "DW_TAG_pointer_type";
2887 case DW_TAG_reference_type
:
2888 return "DW_TAG_reference_type";
2889 case DW_TAG_compile_unit
:
2890 return "DW_TAG_compile_unit";
2891 case DW_TAG_string_type
:
2892 return "DW_TAG_string_type";
2893 case DW_TAG_structure_type
:
2894 return "DW_TAG_structure_type";
2895 case DW_TAG_subroutine_type
:
2896 return "DW_TAG_subroutine_type";
2897 case DW_TAG_typedef
:
2898 return "DW_TAG_typedef";
2899 case DW_TAG_union_type
:
2900 return "DW_TAG_union_type";
2901 case DW_TAG_unspecified_parameters
:
2902 return "DW_TAG_unspecified_parameters";
2903 case DW_TAG_variant
:
2904 return "DW_TAG_variant";
2905 case DW_TAG_common_block
:
2906 return "DW_TAG_common_block";
2907 case DW_TAG_common_inclusion
:
2908 return "DW_TAG_common_inclusion";
2909 case DW_TAG_inheritance
:
2910 return "DW_TAG_inheritance";
2911 case DW_TAG_inlined_subroutine
:
2912 return "DW_TAG_inlined_subroutine";
2914 return "DW_TAG_module";
2915 case DW_TAG_ptr_to_member_type
:
2916 return "DW_TAG_ptr_to_member_type";
2917 case DW_TAG_set_type
:
2918 return "DW_TAG_set_type";
2919 case DW_TAG_subrange_type
:
2920 return "DW_TAG_subrange_type";
2921 case DW_TAG_with_stmt
:
2922 return "DW_TAG_with_stmt";
2923 case DW_TAG_access_declaration
:
2924 return "DW_TAG_access_declaration";
2925 case DW_TAG_base_type
:
2926 return "DW_TAG_base_type";
2927 case DW_TAG_catch_block
:
2928 return "DW_TAG_catch_block";
2929 case DW_TAG_const_type
:
2930 return "DW_TAG_const_type";
2931 case DW_TAG_constant
:
2932 return "DW_TAG_constant";
2933 case DW_TAG_enumerator
:
2934 return "DW_TAG_enumerator";
2935 case DW_TAG_file_type
:
2936 return "DW_TAG_file_type";
2938 return "DW_TAG_friend";
2939 case DW_TAG_namelist
:
2940 return "DW_TAG_namelist";
2941 case DW_TAG_namelist_item
:
2942 return "DW_TAG_namelist_item";
2943 case DW_TAG_packed_type
:
2944 return "DW_TAG_packed_type";
2945 case DW_TAG_subprogram
:
2946 return "DW_TAG_subprogram";
2947 case DW_TAG_template_type_param
:
2948 return "DW_TAG_template_type_param";
2949 case DW_TAG_template_value_param
:
2950 return "DW_TAG_template_value_param";
2951 case DW_TAG_thrown_type
:
2952 return "DW_TAG_thrown_type";
2953 case DW_TAG_try_block
:
2954 return "DW_TAG_try_block";
2955 case DW_TAG_variant_part
:
2956 return "DW_TAG_variant_part";
2957 case DW_TAG_variable
:
2958 return "DW_TAG_variable";
2959 case DW_TAG_volatile_type
:
2960 return "DW_TAG_volatile_type";
2961 case DW_TAG_MIPS_loop
:
2962 return "DW_TAG_MIPS_loop";
2963 case DW_TAG_format_label
:
2964 return "DW_TAG_format_label";
2965 case DW_TAG_function_template
:
2966 return "DW_TAG_function_template";
2967 case DW_TAG_class_template
:
2968 return "DW_TAG_class_template";
2970 return "DW_TAG_<unknown>";
2974 /* Convert a DWARF attribute code into its string name. */
2977 dwarf_attr_name (attr
)
2978 register unsigned attr
;
2983 return "DW_AT_sibling";
2984 case DW_AT_location
:
2985 return "DW_AT_location";
2987 return "DW_AT_name";
2988 case DW_AT_ordering
:
2989 return "DW_AT_ordering";
2990 case DW_AT_subscr_data
:
2991 return "DW_AT_subscr_data";
2992 case DW_AT_byte_size
:
2993 return "DW_AT_byte_size";
2994 case DW_AT_bit_offset
:
2995 return "DW_AT_bit_offset";
2996 case DW_AT_bit_size
:
2997 return "DW_AT_bit_size";
2998 case DW_AT_element_list
:
2999 return "DW_AT_element_list";
3000 case DW_AT_stmt_list
:
3001 return "DW_AT_stmt_list";
3003 return "DW_AT_low_pc";
3005 return "DW_AT_high_pc";
3006 case DW_AT_language
:
3007 return "DW_AT_language";
3009 return "DW_AT_member";
3011 return "DW_AT_discr";
3012 case DW_AT_discr_value
:
3013 return "DW_AT_discr_value";
3014 case DW_AT_visibility
:
3015 return "DW_AT_visibility";
3017 return "DW_AT_import";
3018 case DW_AT_string_length
:
3019 return "DW_AT_string_length";
3020 case DW_AT_common_reference
:
3021 return "DW_AT_common_reference";
3022 case DW_AT_comp_dir
:
3023 return "DW_AT_comp_dir";
3024 case DW_AT_const_value
:
3025 return "DW_AT_const_value";
3026 case DW_AT_containing_type
:
3027 return "DW_AT_containing_type";
3028 case DW_AT_default_value
:
3029 return "DW_AT_default_value";
3031 return "DW_AT_inline";
3032 case DW_AT_is_optional
:
3033 return "DW_AT_is_optional";
3034 case DW_AT_lower_bound
:
3035 return "DW_AT_lower_bound";
3036 case DW_AT_producer
:
3037 return "DW_AT_producer";
3038 case DW_AT_prototyped
:
3039 return "DW_AT_prototyped";
3040 case DW_AT_return_addr
:
3041 return "DW_AT_return_addr";
3042 case DW_AT_start_scope
:
3043 return "DW_AT_start_scope";
3044 case DW_AT_stride_size
:
3045 return "DW_AT_stride_size";
3046 case DW_AT_upper_bound
:
3047 return "DW_AT_upper_bound";
3048 case DW_AT_abstract_origin
:
3049 return "DW_AT_abstract_origin";
3050 case DW_AT_accessibility
:
3051 return "DW_AT_accessibility";
3052 case DW_AT_address_class
:
3053 return "DW_AT_address_class";
3054 case DW_AT_artificial
:
3055 return "DW_AT_artificial";
3056 case DW_AT_base_types
:
3057 return "DW_AT_base_types";
3058 case DW_AT_calling_convention
:
3059 return "DW_AT_calling_convention";
3061 return "DW_AT_count";
3062 case DW_AT_data_member_location
:
3063 return "DW_AT_data_member_location";
3064 case DW_AT_decl_column
:
3065 return "DW_AT_decl_column";
3066 case DW_AT_decl_file
:
3067 return "DW_AT_decl_file";
3068 case DW_AT_decl_line
:
3069 return "DW_AT_decl_line";
3070 case DW_AT_declaration
:
3071 return "DW_AT_declaration";
3072 case DW_AT_discr_list
:
3073 return "DW_AT_discr_list";
3074 case DW_AT_encoding
:
3075 return "DW_AT_encoding";
3076 case DW_AT_external
:
3077 return "DW_AT_external";
3078 case DW_AT_frame_base
:
3079 return "DW_AT_frame_base";
3081 return "DW_AT_friend";
3082 case DW_AT_identifier_case
:
3083 return "DW_AT_identifier_case";
3084 case DW_AT_macro_info
:
3085 return "DW_AT_macro_info";
3086 case DW_AT_namelist_items
:
3087 return "DW_AT_namelist_items";
3088 case DW_AT_priority
:
3089 return "DW_AT_priority";
3091 return "DW_AT_segment";
3092 case DW_AT_specification
:
3093 return "DW_AT_specification";
3094 case DW_AT_static_link
:
3095 return "DW_AT_static_link";
3097 return "DW_AT_type";
3098 case DW_AT_use_location
:
3099 return "DW_AT_use_location";
3100 case DW_AT_variable_parameter
:
3101 return "DW_AT_variable_parameter";
3102 case DW_AT_virtuality
:
3103 return "DW_AT_virtuality";
3104 case DW_AT_vtable_elem_location
:
3105 return "DW_AT_vtable_elem_location";
3107 case DW_AT_MIPS_fde
:
3108 return "DW_AT_MIPS_fde";
3109 case DW_AT_MIPS_loop_begin
:
3110 return "DW_AT_MIPS_loop_begin";
3111 case DW_AT_MIPS_tail_loop_begin
:
3112 return "DW_AT_MIPS_tail_loop_begin";
3113 case DW_AT_MIPS_epilog_begin
:
3114 return "DW_AT_MIPS_epilog_begin";
3115 case DW_AT_MIPS_loop_unroll_factor
:
3116 return "DW_AT_MIPS_loop_unroll_factor";
3117 case DW_AT_MIPS_software_pipeline_depth
:
3118 return "DW_AT_MIPS_software_pipeline_depth";
3119 case DW_AT_MIPS_linkage_name
:
3120 return "DW_AT_MIPS_linkage_name";
3121 case DW_AT_MIPS_stride
:
3122 return "DW_AT_MIPS_stride";
3123 case DW_AT_MIPS_abstract_name
:
3124 return "DW_AT_MIPS_abstract_name";
3125 case DW_AT_MIPS_clone_origin
:
3126 return "DW_AT_MIPS_clone_origin";
3127 case DW_AT_MIPS_has_inlines
:
3128 return "DW_AT_MIPS_has_inlines";
3130 case DW_AT_sf_names
:
3131 return "DW_AT_sf_names";
3132 case DW_AT_src_info
:
3133 return "DW_AT_src_info";
3134 case DW_AT_mac_info
:
3135 return "DW_AT_mac_info";
3136 case DW_AT_src_coords
:
3137 return "DW_AT_src_coords";
3138 case DW_AT_body_begin
:
3139 return "DW_AT_body_begin";
3140 case DW_AT_body_end
:
3141 return "DW_AT_body_end";
3143 return "DW_AT_<unknown>";
3147 /* Convert a DWARF value form code into its string name. */
3150 dwarf_form_name (form
)
3151 register unsigned form
;
3156 return "DW_FORM_addr";
3157 case DW_FORM_block2
:
3158 return "DW_FORM_block2";
3159 case DW_FORM_block4
:
3160 return "DW_FORM_block4";
3162 return "DW_FORM_data2";
3164 return "DW_FORM_data4";
3166 return "DW_FORM_data8";
3167 case DW_FORM_string
:
3168 return "DW_FORM_string";
3170 return "DW_FORM_block";
3171 case DW_FORM_block1
:
3172 return "DW_FORM_block1";
3174 return "DW_FORM_data1";
3176 return "DW_FORM_flag";
3178 return "DW_FORM_sdata";
3180 return "DW_FORM_strp";
3182 return "DW_FORM_udata";
3183 case DW_FORM_ref_addr
:
3184 return "DW_FORM_ref_addr";
3186 return "DW_FORM_ref1";
3188 return "DW_FORM_ref2";
3190 return "DW_FORM_ref4";
3192 return "DW_FORM_ref8";
3193 case DW_FORM_ref_udata
:
3194 return "DW_FORM_ref_udata";
3195 case DW_FORM_indirect
:
3196 return "DW_FORM_indirect";
3198 return "DW_FORM_<unknown>";
3202 /* Convert a DWARF stack opcode into its string name. */
3205 dwarf_stack_op_name (op
)
3206 register unsigned op
;
3211 return "DW_OP_addr";
3213 return "DW_OP_deref";
3215 return "DW_OP_const1u";
3217 return "DW_OP_const1s";
3219 return "DW_OP_const2u";
3221 return "DW_OP_const2s";
3223 return "DW_OP_const4u";
3225 return "DW_OP_const4s";
3227 return "DW_OP_const8u";
3229 return "DW_OP_const8s";
3231 return "DW_OP_constu";
3233 return "DW_OP_consts";
3237 return "DW_OP_drop";
3239 return "DW_OP_over";
3241 return "DW_OP_pick";
3243 return "DW_OP_swap";
3247 return "DW_OP_xderef";
3255 return "DW_OP_minus";
3267 return "DW_OP_plus";
3268 case DW_OP_plus_uconst
:
3269 return "DW_OP_plus_uconst";
3275 return "DW_OP_shra";
3293 return "DW_OP_skip";
3295 return "DW_OP_lit0";
3297 return "DW_OP_lit1";
3299 return "DW_OP_lit2";
3301 return "DW_OP_lit3";
3303 return "DW_OP_lit4";
3305 return "DW_OP_lit5";
3307 return "DW_OP_lit6";
3309 return "DW_OP_lit7";
3311 return "DW_OP_lit8";
3313 return "DW_OP_lit9";
3315 return "DW_OP_lit10";
3317 return "DW_OP_lit11";
3319 return "DW_OP_lit12";
3321 return "DW_OP_lit13";
3323 return "DW_OP_lit14";
3325 return "DW_OP_lit15";
3327 return "DW_OP_lit16";
3329 return "DW_OP_lit17";
3331 return "DW_OP_lit18";
3333 return "DW_OP_lit19";
3335 return "DW_OP_lit20";
3337 return "DW_OP_lit21";
3339 return "DW_OP_lit22";
3341 return "DW_OP_lit23";
3343 return "DW_OP_lit24";
3345 return "DW_OP_lit25";
3347 return "DW_OP_lit26";
3349 return "DW_OP_lit27";
3351 return "DW_OP_lit28";
3353 return "DW_OP_lit29";
3355 return "DW_OP_lit30";
3357 return "DW_OP_lit31";
3359 return "DW_OP_reg0";
3361 return "DW_OP_reg1";
3363 return "DW_OP_reg2";
3365 return "DW_OP_reg3";
3367 return "DW_OP_reg4";
3369 return "DW_OP_reg5";
3371 return "DW_OP_reg6";
3373 return "DW_OP_reg7";
3375 return "DW_OP_reg8";
3377 return "DW_OP_reg9";
3379 return "DW_OP_reg10";
3381 return "DW_OP_reg11";
3383 return "DW_OP_reg12";
3385 return "DW_OP_reg13";
3387 return "DW_OP_reg14";
3389 return "DW_OP_reg15";
3391 return "DW_OP_reg16";
3393 return "DW_OP_reg17";
3395 return "DW_OP_reg18";
3397 return "DW_OP_reg19";
3399 return "DW_OP_reg20";
3401 return "DW_OP_reg21";
3403 return "DW_OP_reg22";
3405 return "DW_OP_reg23";
3407 return "DW_OP_reg24";
3409 return "DW_OP_reg25";
3411 return "DW_OP_reg26";
3413 return "DW_OP_reg27";
3415 return "DW_OP_reg28";
3417 return "DW_OP_reg29";
3419 return "DW_OP_reg30";
3421 return "DW_OP_reg31";
3423 return "DW_OP_breg0";
3425 return "DW_OP_breg1";
3427 return "DW_OP_breg2";
3429 return "DW_OP_breg3";
3431 return "DW_OP_breg4";
3433 return "DW_OP_breg5";
3435 return "DW_OP_breg6";
3437 return "DW_OP_breg7";
3439 return "DW_OP_breg8";
3441 return "DW_OP_breg9";
3443 return "DW_OP_breg10";
3445 return "DW_OP_breg11";
3447 return "DW_OP_breg12";
3449 return "DW_OP_breg13";
3451 return "DW_OP_breg14";
3453 return "DW_OP_breg15";
3455 return "DW_OP_breg16";
3457 return "DW_OP_breg17";
3459 return "DW_OP_breg18";
3461 return "DW_OP_breg19";
3463 return "DW_OP_breg20";
3465 return "DW_OP_breg21";
3467 return "DW_OP_breg22";
3469 return "DW_OP_breg23";
3471 return "DW_OP_breg24";
3473 return "DW_OP_breg25";
3475 return "DW_OP_breg26";
3477 return "DW_OP_breg27";
3479 return "DW_OP_breg28";
3481 return "DW_OP_breg29";
3483 return "DW_OP_breg30";
3485 return "DW_OP_breg31";
3487 return "DW_OP_regx";
3489 return "DW_OP_fbreg";
3491 return "DW_OP_bregx";
3493 return "DW_OP_piece";
3494 case DW_OP_deref_size
:
3495 return "DW_OP_deref_size";
3496 case DW_OP_xderef_size
:
3497 return "DW_OP_xderef_size";
3501 return "OP_<unknown>";
3505 /* Convert a DWARF type code into its string name. */
3509 dwarf_type_encoding_name (enc
)
3510 register unsigned enc
;
3514 case DW_ATE_address
:
3515 return "DW_ATE_address";
3516 case DW_ATE_boolean
:
3517 return "DW_ATE_boolean";
3518 case DW_ATE_complex_float
:
3519 return "DW_ATE_complex_float";
3521 return "DW_ATE_float";
3523 return "DW_ATE_signed";
3524 case DW_ATE_signed_char
:
3525 return "DW_ATE_signed_char";
3526 case DW_ATE_unsigned
:
3527 return "DW_ATE_unsigned";
3528 case DW_ATE_unsigned_char
:
3529 return "DW_ATE_unsigned_char";
3531 return "DW_ATE_<unknown>";
3536 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3537 instance of an inlined instance of a decl which is local to an inline
3538 function, so we have to trace all of the way back through the origin chain
3539 to find out what sort of node actually served as the original seed for the
3543 decl_ultimate_origin (decl
)
3546 #ifdef ENABLE_CHECKING
3547 if (DECL_FROM_INLINE (DECL_ORIGIN (decl
)))
3548 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
3549 most distant ancestor, this should never happen. */
3553 return DECL_ABSTRACT_ORIGIN (decl
);
3556 /* Determine the "ultimate origin" of a block. The block may be an inlined
3557 instance of an inlined instance of a block which is local to an inline
3558 function, so we have to trace all of the way back through the origin chain
3559 to find out what sort of node actually served as the original seed for the
3563 block_ultimate_origin (block
)
3564 register tree block
;
3566 register tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
3568 if (immediate_origin
== NULL_TREE
)
3572 register tree ret_val
;
3573 register tree lookahead
= immediate_origin
;
3577 ret_val
= lookahead
;
3578 lookahead
= (TREE_CODE (ret_val
) == BLOCK
)
3579 ? BLOCK_ABSTRACT_ORIGIN (ret_val
)
3582 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
3588 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3589 of a virtual function may refer to a base class, so we check the 'this'
3593 decl_class_context (decl
)
3596 tree context
= NULL_TREE
;
3598 if (TREE_CODE (decl
) != FUNCTION_DECL
|| ! DECL_VINDEX (decl
))
3599 context
= DECL_CONTEXT (decl
);
3601 context
= TYPE_MAIN_VARIANT
3602 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
3604 if (context
&& TREE_CODE_CLASS (TREE_CODE (context
)) != 't')
3605 context
= NULL_TREE
;
3610 /* Add an attribute/value pair to a DIE */
3613 add_dwarf_attr (die
, attr
)
3614 register dw_die_ref die
;
3615 register dw_attr_ref attr
;
3617 if (die
!= NULL
&& attr
!= NULL
)
3619 if (die
->die_attr
== NULL
)
3621 die
->die_attr
= attr
;
3622 die
->die_attr_last
= attr
;
3626 die
->die_attr_last
->dw_attr_next
= attr
;
3627 die
->die_attr_last
= attr
;
3632 /* Add a flag value attribute to a DIE. */
3635 add_AT_flag (die
, attr_kind
, flag
)
3636 register dw_die_ref die
;
3637 register enum dwarf_attribute attr_kind
;
3638 register unsigned flag
;
3640 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3642 attr
->dw_attr_next
= NULL
;
3643 attr
->dw_attr
= attr_kind
;
3644 attr
->dw_attr_val
.val_class
= dw_val_class_flag
;
3645 attr
->dw_attr_val
.v
.val_flag
= flag
;
3646 add_dwarf_attr (die
, attr
);
3649 /* Add a signed integer attribute value to a DIE. */
3652 add_AT_int (die
, attr_kind
, int_val
)
3653 register dw_die_ref die
;
3654 register enum dwarf_attribute attr_kind
;
3655 register long int int_val
;
3657 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3659 attr
->dw_attr_next
= NULL
;
3660 attr
->dw_attr
= attr_kind
;
3661 attr
->dw_attr_val
.val_class
= dw_val_class_const
;
3662 attr
->dw_attr_val
.v
.val_int
= int_val
;
3663 add_dwarf_attr (die
, attr
);
3666 /* Add an unsigned integer attribute value to a DIE. */
3669 add_AT_unsigned (die
, attr_kind
, unsigned_val
)
3670 register dw_die_ref die
;
3671 register enum dwarf_attribute attr_kind
;
3672 register unsigned long unsigned_val
;
3674 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3676 attr
->dw_attr_next
= NULL
;
3677 attr
->dw_attr
= attr_kind
;
3678 attr
->dw_attr_val
.val_class
= dw_val_class_unsigned_const
;
3679 attr
->dw_attr_val
.v
.val_unsigned
= unsigned_val
;
3680 add_dwarf_attr (die
, attr
);
3683 /* Add an unsigned double integer attribute value to a DIE. */
3686 add_AT_long_long (die
, attr_kind
, val_hi
, val_low
)
3687 register dw_die_ref die
;
3688 register enum dwarf_attribute attr_kind
;
3689 register unsigned long val_hi
;
3690 register unsigned long val_low
;
3692 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3694 attr
->dw_attr_next
= NULL
;
3695 attr
->dw_attr
= attr_kind
;
3696 attr
->dw_attr_val
.val_class
= dw_val_class_long_long
;
3697 attr
->dw_attr_val
.v
.val_long_long
.hi
= val_hi
;
3698 attr
->dw_attr_val
.v
.val_long_long
.low
= val_low
;
3699 add_dwarf_attr (die
, attr
);
3702 /* Add a floating point attribute value to a DIE and return it. */
3705 add_AT_float (die
, attr_kind
, length
, array
)
3706 register dw_die_ref die
;
3707 register enum dwarf_attribute attr_kind
;
3708 register unsigned length
;
3709 register long *array
;
3711 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3713 attr
->dw_attr_next
= NULL
;
3714 attr
->dw_attr
= attr_kind
;
3715 attr
->dw_attr_val
.val_class
= dw_val_class_float
;
3716 attr
->dw_attr_val
.v
.val_float
.length
= length
;
3717 attr
->dw_attr_val
.v
.val_float
.array
= array
;
3718 add_dwarf_attr (die
, attr
);
3721 /* Add a string attribute value to a DIE. */
3724 add_AT_string (die
, attr_kind
, str
)
3725 register dw_die_ref die
;
3726 register enum dwarf_attribute attr_kind
;
3729 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3731 attr
->dw_attr_next
= NULL
;
3732 attr
->dw_attr
= attr_kind
;
3733 attr
->dw_attr_val
.val_class
= dw_val_class_str
;
3734 attr
->dw_attr_val
.v
.val_str
= xstrdup (str
);
3735 add_dwarf_attr (die
, attr
);
3738 /* Add a DIE reference attribute value to a DIE. */
3741 add_AT_die_ref (die
, attr_kind
, targ_die
)
3742 register dw_die_ref die
;
3743 register enum dwarf_attribute attr_kind
;
3744 register dw_die_ref targ_die
;
3746 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3748 attr
->dw_attr_next
= NULL
;
3749 attr
->dw_attr
= attr_kind
;
3750 attr
->dw_attr_val
.val_class
= dw_val_class_die_ref
;
3751 attr
->dw_attr_val
.v
.val_die_ref
= targ_die
;
3752 add_dwarf_attr (die
, attr
);
3755 /* Add an FDE reference attribute value to a DIE. */
3758 add_AT_fde_ref (die
, attr_kind
, targ_fde
)
3759 register dw_die_ref die
;
3760 register enum dwarf_attribute attr_kind
;
3761 register unsigned targ_fde
;
3763 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3765 attr
->dw_attr_next
= NULL
;
3766 attr
->dw_attr
= attr_kind
;
3767 attr
->dw_attr_val
.val_class
= dw_val_class_fde_ref
;
3768 attr
->dw_attr_val
.v
.val_fde_index
= targ_fde
;
3769 add_dwarf_attr (die
, attr
);
3772 /* Add a location description attribute value to a DIE. */
3775 add_AT_loc (die
, attr_kind
, loc
)
3776 register dw_die_ref die
;
3777 register enum dwarf_attribute attr_kind
;
3778 register dw_loc_descr_ref loc
;
3780 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3782 attr
->dw_attr_next
= NULL
;
3783 attr
->dw_attr
= attr_kind
;
3784 attr
->dw_attr_val
.val_class
= dw_val_class_loc
;
3785 attr
->dw_attr_val
.v
.val_loc
= loc
;
3786 add_dwarf_attr (die
, attr
);
3789 /* Add an address constant attribute value to a DIE. */
3792 add_AT_addr (die
, attr_kind
, addr
)
3793 register dw_die_ref die
;
3794 register enum dwarf_attribute attr_kind
;
3797 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3799 attr
->dw_attr_next
= NULL
;
3800 attr
->dw_attr
= attr_kind
;
3801 attr
->dw_attr_val
.val_class
= dw_val_class_addr
;
3802 attr
->dw_attr_val
.v
.val_addr
= addr
;
3803 add_dwarf_attr (die
, attr
);
3806 /* Add a label identifier attribute value to a DIE. */
3809 add_AT_lbl_id (die
, attr_kind
, lbl_id
)
3810 register dw_die_ref die
;
3811 register enum dwarf_attribute attr_kind
;
3812 register char *lbl_id
;
3814 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3816 attr
->dw_attr_next
= NULL
;
3817 attr
->dw_attr
= attr_kind
;
3818 attr
->dw_attr_val
.val_class
= dw_val_class_lbl_id
;
3819 attr
->dw_attr_val
.v
.val_lbl_id
= xstrdup (lbl_id
);
3820 add_dwarf_attr (die
, attr
);
3823 /* Add a section offset attribute value to a DIE. */
3826 add_AT_section_offset (die
, attr_kind
, section
)
3827 register dw_die_ref die
;
3828 register enum dwarf_attribute attr_kind
;
3829 register char *section
;
3831 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3833 attr
->dw_attr_next
= NULL
;
3834 attr
->dw_attr
= attr_kind
;
3835 attr
->dw_attr_val
.val_class
= dw_val_class_section_offset
;
3836 attr
->dw_attr_val
.v
.val_section
= section
;
3837 add_dwarf_attr (die
, attr
);
3841 /* Test if die refers to an external subroutine. */
3844 is_extern_subr_die (die
)
3845 register dw_die_ref die
;
3847 register dw_attr_ref a
;
3848 register int is_subr
= FALSE
;
3849 register int is_extern
= FALSE
;
3851 if (die
!= NULL
&& die
->die_tag
== DW_TAG_subprogram
)
3854 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
3856 if (a
->dw_attr
== DW_AT_external
3857 && a
->dw_attr_val
.val_class
== dw_val_class_flag
3858 && a
->dw_attr_val
.v
.val_flag
!= 0)
3866 return is_subr
&& is_extern
;
3869 /* Get the attribute of type attr_kind. */
3871 static inline dw_attr_ref
3872 get_AT (die
, attr_kind
)
3873 register dw_die_ref die
;
3874 register enum dwarf_attribute attr_kind
;
3876 register dw_attr_ref a
;
3877 register dw_die_ref spec
= NULL
;
3881 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
3883 if (a
->dw_attr
== attr_kind
)
3886 if (a
->dw_attr
== DW_AT_specification
3887 || a
->dw_attr
== DW_AT_abstract_origin
)
3888 spec
= a
->dw_attr_val
.v
.val_die_ref
;
3892 return get_AT (spec
, attr_kind
);
3898 /* Return the "low pc" attribute value, typically associated with
3899 a subprogram DIE. Return null if the "low pc" attribute is
3900 either not prsent, or if it cannot be represented as an
3901 assembler label identifier. */
3903 static inline char *
3905 register dw_die_ref die
;
3907 register dw_attr_ref a
= get_AT (die
, DW_AT_low_pc
);
3909 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_lbl_id
)
3910 return a
->dw_attr_val
.v
.val_lbl_id
;
3915 /* Return the "high pc" attribute value, typically associated with
3916 a subprogram DIE. Return null if the "high pc" attribute is
3917 either not prsent, or if it cannot be represented as an
3918 assembler label identifier. */
3920 static inline char *
3922 register dw_die_ref die
;
3924 register dw_attr_ref a
= get_AT (die
, DW_AT_high_pc
);
3926 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_lbl_id
)
3927 return a
->dw_attr_val
.v
.val_lbl_id
;
3932 /* Return the value of the string attribute designated by ATTR_KIND, or
3933 NULL if it is not present. */
3935 static inline char *
3936 get_AT_string (die
, attr_kind
)
3937 register dw_die_ref die
;
3938 register enum dwarf_attribute attr_kind
;
3940 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3942 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_str
)
3943 return a
->dw_attr_val
.v
.val_str
;
3948 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3949 if it is not present. */
3952 get_AT_flag (die
, attr_kind
)
3953 register dw_die_ref die
;
3954 register enum dwarf_attribute attr_kind
;
3956 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3958 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_flag
)
3959 return a
->dw_attr_val
.v
.val_flag
;
3964 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3965 if it is not present. */
3967 static inline unsigned
3968 get_AT_unsigned (die
, attr_kind
)
3969 register dw_die_ref die
;
3970 register enum dwarf_attribute attr_kind
;
3972 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3974 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_unsigned_const
)
3975 return a
->dw_attr_val
.v
.val_unsigned
;
3983 register unsigned lang
= get_AT_unsigned (comp_unit_die
, DW_AT_language
);
3985 return (lang
== DW_LANG_C
|| lang
== DW_LANG_C89
3986 || lang
== DW_LANG_C_plus_plus
);
3992 register unsigned lang
= get_AT_unsigned (comp_unit_die
, DW_AT_language
);
3994 return (lang
== DW_LANG_Fortran77
|| lang
== DW_LANG_Fortran90
);
3997 /* Remove the specified attribute if present. */
4000 remove_AT (die
, attr_kind
)
4001 register dw_die_ref die
;
4002 register enum dwarf_attribute attr_kind
;
4004 register dw_attr_ref a
;
4005 register dw_attr_ref removed
= NULL
;;
4009 if (die
->die_attr
->dw_attr
== attr_kind
)
4011 removed
= die
->die_attr
;
4012 if (die
->die_attr_last
== die
->die_attr
)
4013 die
->die_attr_last
= NULL
;
4015 die
->die_attr
= die
->die_attr
->dw_attr_next
;
4019 for (a
= die
->die_attr
; a
->dw_attr_next
!= NULL
;
4020 a
= a
->dw_attr_next
)
4021 if (a
->dw_attr_next
->dw_attr
== attr_kind
)
4023 removed
= a
->dw_attr_next
;
4024 if (die
->die_attr_last
== a
->dw_attr_next
)
4025 die
->die_attr_last
= a
;
4027 a
->dw_attr_next
= a
->dw_attr_next
->dw_attr_next
;
4036 /* Discard the children of this DIE. */
4039 remove_children (die
)
4040 register dw_die_ref die
;
4042 register dw_die_ref child_die
= die
->die_child
;
4044 die
->die_child
= NULL
;
4045 die
->die_child_last
= NULL
;
4047 while (child_die
!= NULL
)
4049 register dw_die_ref tmp_die
= child_die
;
4050 register dw_attr_ref a
;
4052 child_die
= child_die
->die_sib
;
4054 for (a
= tmp_die
->die_attr
; a
!= NULL
; )
4056 register dw_attr_ref tmp_a
= a
;
4058 a
= a
->dw_attr_next
;
4066 /* Add a child DIE below its parent. */
4069 add_child_die (die
, child_die
)
4070 register dw_die_ref die
;
4071 register dw_die_ref child_die
;
4073 if (die
!= NULL
&& child_die
!= NULL
)
4075 if (die
== child_die
)
4077 child_die
->die_parent
= die
;
4078 child_die
->die_sib
= NULL
;
4080 if (die
->die_child
== NULL
)
4082 die
->die_child
= child_die
;
4083 die
->die_child_last
= child_die
;
4087 die
->die_child_last
->die_sib
= child_die
;
4088 die
->die_child_last
= child_die
;
4093 /* Return a pointer to a newly created DIE node. */
4095 static inline dw_die_ref
4096 new_die (tag_value
, parent_die
)
4097 register enum dwarf_tag tag_value
;
4098 register dw_die_ref parent_die
;
4100 register dw_die_ref die
= (dw_die_ref
) xmalloc (sizeof (die_node
));
4102 die
->die_tag
= tag_value
;
4103 die
->die_abbrev
= 0;
4104 die
->die_offset
= 0;
4105 die
->die_child
= NULL
;
4106 die
->die_parent
= NULL
;
4107 die
->die_sib
= NULL
;
4108 die
->die_child_last
= NULL
;
4109 die
->die_attr
= NULL
;
4110 die
->die_attr_last
= NULL
;
4112 if (parent_die
!= NULL
)
4113 add_child_die (parent_die
, die
);
4116 limbo_die_node
*limbo_node
;
4118 limbo_node
= (limbo_die_node
*) xmalloc (sizeof (limbo_die_node
));
4119 limbo_node
->die
= die
;
4120 limbo_node
->next
= limbo_die_list
;
4121 limbo_die_list
= limbo_node
;
4127 /* Return the DIE associated with the given type specifier. */
4129 static inline dw_die_ref
4130 lookup_type_die (type
)
4133 return (dw_die_ref
) TYPE_SYMTAB_POINTER (type
);
4136 /* Equate a DIE to a given type specifier. */
4139 equate_type_number_to_die (type
, type_die
)
4141 register dw_die_ref type_die
;
4143 TYPE_SYMTAB_POINTER (type
) = (char *) type_die
;
4146 /* Return the DIE associated with a given declaration. */
4148 static inline dw_die_ref
4149 lookup_decl_die (decl
)
4152 register unsigned decl_id
= DECL_UID (decl
);
4154 return (decl_id
< decl_die_table_in_use
4155 ? decl_die_table
[decl_id
] : NULL
);
4158 /* Equate a DIE to a particular declaration. */
4161 equate_decl_number_to_die (decl
, decl_die
)
4163 register dw_die_ref decl_die
;
4165 register unsigned decl_id
= DECL_UID (decl
);
4166 register unsigned num_allocated
;
4168 if (decl_id
>= decl_die_table_allocated
)
4171 = ((decl_id
+ 1 + DECL_DIE_TABLE_INCREMENT
- 1)
4172 / DECL_DIE_TABLE_INCREMENT
)
4173 * DECL_DIE_TABLE_INCREMENT
;
4176 = (dw_die_ref
*) xrealloc (decl_die_table
,
4177 sizeof (dw_die_ref
) * num_allocated
);
4179 bzero ((char *) &decl_die_table
[decl_die_table_allocated
],
4180 (num_allocated
- decl_die_table_allocated
) * sizeof (dw_die_ref
));
4181 decl_die_table_allocated
= num_allocated
;
4184 if (decl_id
>= decl_die_table_in_use
)
4185 decl_die_table_in_use
= (decl_id
+ 1);
4187 decl_die_table
[decl_id
] = decl_die
;
4190 /* Return a pointer to a newly allocated location description. Location
4191 descriptions are simple expression terms that can be strung
4192 together to form more complicated location (address) descriptions. */
4194 static inline dw_loc_descr_ref
4195 new_loc_descr (op
, oprnd1
, oprnd2
)
4196 register enum dwarf_location_atom op
;
4197 register unsigned long oprnd1
;
4198 register unsigned long oprnd2
;
4200 register dw_loc_descr_ref descr
4201 = (dw_loc_descr_ref
) xmalloc (sizeof (dw_loc_descr_node
));
4203 descr
->dw_loc_next
= NULL
;
4204 descr
->dw_loc_opc
= op
;
4205 descr
->dw_loc_oprnd1
.val_class
= dw_val_class_unsigned_const
;
4206 descr
->dw_loc_oprnd1
.v
.val_unsigned
= oprnd1
;
4207 descr
->dw_loc_oprnd2
.val_class
= dw_val_class_unsigned_const
;
4208 descr
->dw_loc_oprnd2
.v
.val_unsigned
= oprnd2
;
4213 /* Add a location description term to a location description expression. */
4216 add_loc_descr (list_head
, descr
)
4217 register dw_loc_descr_ref
*list_head
;
4218 register dw_loc_descr_ref descr
;
4220 register dw_loc_descr_ref
*d
;
4222 /* Find the end of the chain. */
4223 for (d
= list_head
; (*d
) != NULL
; d
= &(*d
)->dw_loc_next
)
4229 /* Keep track of the number of spaces used to indent the
4230 output of the debugging routines that print the structure of
4231 the DIE internal representation. */
4232 static int print_indent
;
4234 /* Indent the line the number of spaces given by print_indent. */
4237 print_spaces (outfile
)
4240 fprintf (outfile
, "%*s", print_indent
, "");
4243 /* Print the information associated with a given DIE, and its children.
4244 This routine is a debugging aid only. */
4247 print_die (die
, outfile
)
4251 register dw_attr_ref a
;
4252 register dw_die_ref c
;
4254 print_spaces (outfile
);
4255 fprintf (outfile
, "DIE %4lu: %s\n",
4256 die
->die_offset
, dwarf_tag_name (die
->die_tag
));
4257 print_spaces (outfile
);
4258 fprintf (outfile
, " abbrev id: %lu", die
->die_abbrev
);
4259 fprintf (outfile
, " offset: %lu\n", die
->die_offset
);
4261 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
4263 print_spaces (outfile
);
4264 fprintf (outfile
, " %s: ", dwarf_attr_name (a
->dw_attr
));
4266 switch (a
->dw_attr_val
.val_class
)
4268 case dw_val_class_addr
:
4269 fprintf (outfile
, "address");
4271 case dw_val_class_loc
:
4272 fprintf (outfile
, "location descriptor");
4274 case dw_val_class_const
:
4275 fprintf (outfile
, "%ld", a
->dw_attr_val
.v
.val_int
);
4277 case dw_val_class_unsigned_const
:
4278 fprintf (outfile
, "%lu", a
->dw_attr_val
.v
.val_unsigned
);
4280 case dw_val_class_long_long
:
4281 fprintf (outfile
, "constant (%lu,%lu)",
4282 a
->dw_attr_val
.v
.val_long_long
.hi
,
4283 a
->dw_attr_val
.v
.val_long_long
.low
);
4285 case dw_val_class_float
:
4286 fprintf (outfile
, "floating-point constant");
4288 case dw_val_class_flag
:
4289 fprintf (outfile
, "%u", a
->dw_attr_val
.v
.val_flag
);
4291 case dw_val_class_die_ref
:
4292 if (a
->dw_attr_val
.v
.val_die_ref
!= NULL
)
4293 fprintf (outfile
, "die -> %lu",
4294 a
->dw_attr_val
.v
.val_die_ref
->die_offset
);
4296 fprintf (outfile
, "die -> <null>");
4298 case dw_val_class_lbl_id
:
4299 fprintf (outfile
, "label: %s", a
->dw_attr_val
.v
.val_lbl_id
);
4301 case dw_val_class_section_offset
:
4302 fprintf (outfile
, "section: %s", a
->dw_attr_val
.v
.val_section
);
4304 case dw_val_class_str
:
4305 if (a
->dw_attr_val
.v
.val_str
!= NULL
)
4306 fprintf (outfile
, "\"%s\"", a
->dw_attr_val
.v
.val_str
);
4308 fprintf (outfile
, "<null>");
4314 fprintf (outfile
, "\n");
4317 if (die
->die_child
!= NULL
)
4320 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4321 print_die (c
, outfile
);
4327 /* Print the contents of the source code line number correspondence table.
4328 This routine is a debugging aid only. */
4331 print_dwarf_line_table (outfile
)
4334 register unsigned i
;
4335 register dw_line_info_ref line_info
;
4337 fprintf (outfile
, "\n\nDWARF source line information\n");
4338 for (i
= 1; i
< line_info_table_in_use
; ++i
)
4340 line_info
= &line_info_table
[i
];
4341 fprintf (outfile
, "%5d: ", i
);
4342 fprintf (outfile
, "%-20s", file_table
[line_info
->dw_file_num
]);
4343 fprintf (outfile
, "%6ld", line_info
->dw_line_num
);
4344 fprintf (outfile
, "\n");
4347 fprintf (outfile
, "\n\n");
4350 /* Print the information collected for a given DIE. */
4353 debug_dwarf_die (die
)
4356 print_die (die
, stderr
);
4359 /* Print all DWARF information collected for the compilation unit.
4360 This routine is a debugging aid only. */
4366 print_die (comp_unit_die
, stderr
);
4367 print_dwarf_line_table (stderr
);
4370 /* Traverse the DIE, and add a sibling attribute if it may have the
4371 effect of speeding up access to siblings. To save some space,
4372 avoid generating sibling attributes for DIE's without children. */
4375 add_sibling_attributes(die
)
4376 register dw_die_ref die
;
4378 register dw_die_ref c
;
4379 register dw_attr_ref attr
;
4380 if (die
!= comp_unit_die
&& die
->die_child
!= NULL
)
4382 attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
4383 attr
->dw_attr_next
= NULL
;
4384 attr
->dw_attr
= DW_AT_sibling
;
4385 attr
->dw_attr_val
.val_class
= dw_val_class_die_ref
;
4386 attr
->dw_attr_val
.v
.val_die_ref
= die
->die_sib
;
4388 /* Add the sibling link to the front of the attribute list. */
4389 attr
->dw_attr_next
= die
->die_attr
;
4390 if (die
->die_attr
== NULL
)
4391 die
->die_attr_last
= attr
;
4393 die
->die_attr
= attr
;
4396 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4397 add_sibling_attributes (c
);
4400 /* The format of each DIE (and its attribute value pairs)
4401 is encoded in an abbreviation table. This routine builds the
4402 abbreviation table and assigns a unique abbreviation id for
4403 each abbreviation entry. The children of each die are visited
4407 build_abbrev_table (die
)
4408 register dw_die_ref die
;
4410 register unsigned long abbrev_id
;
4411 register unsigned long n_alloc
;
4412 register dw_die_ref c
;
4413 register dw_attr_ref d_attr
, a_attr
;
4414 for (abbrev_id
= 1; abbrev_id
< abbrev_die_table_in_use
; ++abbrev_id
)
4416 register dw_die_ref abbrev
= abbrev_die_table
[abbrev_id
];
4418 if (abbrev
->die_tag
== die
->die_tag
)
4420 if ((abbrev
->die_child
!= NULL
) == (die
->die_child
!= NULL
))
4422 a_attr
= abbrev
->die_attr
;
4423 d_attr
= die
->die_attr
;
4425 while (a_attr
!= NULL
&& d_attr
!= NULL
)
4427 if ((a_attr
->dw_attr
!= d_attr
->dw_attr
)
4428 || (value_format (&a_attr
->dw_attr_val
)
4429 != value_format (&d_attr
->dw_attr_val
)))
4432 a_attr
= a_attr
->dw_attr_next
;
4433 d_attr
= d_attr
->dw_attr_next
;
4436 if (a_attr
== NULL
&& d_attr
== NULL
)
4442 if (abbrev_id
>= abbrev_die_table_in_use
)
4444 if (abbrev_die_table_in_use
>= abbrev_die_table_allocated
)
4446 n_alloc
= abbrev_die_table_allocated
+ ABBREV_DIE_TABLE_INCREMENT
;
4448 = (dw_die_ref
*) xrealloc (abbrev_die_table
,
4449 sizeof (dw_die_ref
) * n_alloc
);
4451 bzero ((char *) &abbrev_die_table
[abbrev_die_table_allocated
],
4452 (n_alloc
- abbrev_die_table_allocated
) * sizeof (dw_die_ref
));
4453 abbrev_die_table_allocated
= n_alloc
;
4456 ++abbrev_die_table_in_use
;
4457 abbrev_die_table
[abbrev_id
] = die
;
4460 die
->die_abbrev
= abbrev_id
;
4461 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4462 build_abbrev_table (c
);
4465 /* Return the size of a string, including the null byte.
4467 This used to treat backslashes as escapes, and hence they were not included
4468 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
4469 which treats a backslash as a backslash, escaping it if necessary, and hence
4470 we must include them in the count. */
4472 static unsigned long
4473 size_of_string (str
)
4476 return strlen (str
) + 1;
4479 /* Return the size of a location descriptor. */
4481 static unsigned long
4482 size_of_loc_descr (loc
)
4483 register dw_loc_descr_ref loc
;
4485 register unsigned long size
= 1;
4487 switch (loc
->dw_loc_opc
)
4509 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4512 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4517 case DW_OP_plus_uconst
:
4518 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4556 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4559 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4562 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4565 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4566 size
+= size_of_sleb128 (loc
->dw_loc_oprnd2
.v
.val_int
);
4569 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4571 case DW_OP_deref_size
:
4572 case DW_OP_xderef_size
:
4582 /* Return the size of a series of location descriptors. */
4584 static unsigned long
4586 register dw_loc_descr_ref loc
;
4588 register unsigned long size
= 0;
4590 for (; loc
!= NULL
; loc
= loc
->dw_loc_next
)
4591 size
+= size_of_loc_descr (loc
);
4596 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4599 constant_size (value
)
4600 long unsigned value
;
4607 log
= floor_log2 (value
);
4610 log
= 1 << (floor_log2 (log
) + 1);
4615 /* Return the size of a DIE, as it is represented in the
4616 .debug_info section. */
4618 static unsigned long
4620 register dw_die_ref die
;
4622 register unsigned long size
= 0;
4623 register dw_attr_ref a
;
4625 size
+= size_of_uleb128 (die
->die_abbrev
);
4626 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
4628 switch (a
->dw_attr_val
.val_class
)
4630 case dw_val_class_addr
:
4633 case dw_val_class_loc
:
4635 register unsigned long lsize
4636 = size_of_locs (a
->dw_attr_val
.v
.val_loc
);
4639 size
+= constant_size (lsize
);
4643 case dw_val_class_const
:
4646 case dw_val_class_unsigned_const
:
4647 size
+= constant_size (a
->dw_attr_val
.v
.val_unsigned
);
4649 case dw_val_class_long_long
:
4650 size
+= 1 + 8; /* block */
4652 case dw_val_class_float
:
4653 size
+= 1 + a
->dw_attr_val
.v
.val_float
.length
* 4; /* block */
4655 case dw_val_class_flag
:
4658 case dw_val_class_die_ref
:
4659 size
+= DWARF_OFFSET_SIZE
;
4661 case dw_val_class_fde_ref
:
4662 size
+= DWARF_OFFSET_SIZE
;
4664 case dw_val_class_lbl_id
:
4667 case dw_val_class_section_offset
:
4668 size
+= DWARF_OFFSET_SIZE
;
4670 case dw_val_class_str
:
4671 size
+= size_of_string (a
->dw_attr_val
.v
.val_str
);
4681 /* Size the debugging information associated with a given DIE.
4682 Visits the DIE's children recursively. Updates the global
4683 variable next_die_offset, on each time through. Uses the
4684 current value of next_die_offset to update the die_offset
4685 field in each DIE. */
4688 calc_die_sizes (die
)
4691 register dw_die_ref c
;
4692 die
->die_offset
= next_die_offset
;
4693 next_die_offset
+= size_of_die (die
);
4695 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4698 if (die
->die_child
!= NULL
)
4699 /* Count the null byte used to terminate sibling lists. */
4700 next_die_offset
+= 1;
4703 /* Return the size of the line information prolog generated for the
4704 compilation unit. */
4706 static unsigned long
4707 size_of_line_prolog ()
4709 register unsigned long size
;
4710 register unsigned long ft_index
;
4712 size
= DWARF_LINE_PROLOG_HEADER_SIZE
;
4714 /* Count the size of the table giving number of args for each
4716 size
+= DWARF_LINE_OPCODE_BASE
- 1;
4718 /* Include directory table is empty (at present). Count only the
4719 null byte used to terminate the table. */
4722 for (ft_index
= 1; ft_index
< file_table_in_use
; ++ft_index
)
4724 /* File name entry. */
4725 size
+= size_of_string (file_table
[ft_index
]);
4727 /* Include directory index. */
4728 size
+= size_of_uleb128 (0);
4730 /* Modification time. */
4731 size
+= size_of_uleb128 (0);
4733 /* File length in bytes. */
4734 size
+= size_of_uleb128 (0);
4737 /* Count the file table terminator. */
4742 /* Return the size of the line information generated for this
4743 compilation unit. */
4745 static unsigned long
4746 size_of_line_info ()
4748 register unsigned long size
;
4749 register unsigned long lt_index
;
4750 register unsigned long current_line
;
4751 register long line_offset
;
4752 register long line_delta
;
4753 register unsigned long current_file
;
4754 register unsigned long function
;
4755 unsigned long size_of_set_address
;
4757 /* Size of a DW_LNE_set_address instruction. */
4758 size_of_set_address
= 1 + size_of_uleb128 (1 + PTR_SIZE
) + 1 + PTR_SIZE
;
4760 /* Version number. */
4763 /* Prolog length specifier. */
4764 size
+= DWARF_OFFSET_SIZE
;
4767 size
+= size_of_line_prolog ();
4769 /* Set address register instruction. */
4770 size
+= size_of_set_address
;
4774 for (lt_index
= 1; lt_index
< line_info_table_in_use
; ++lt_index
)
4776 register dw_line_info_ref line_info
;
4778 /* Advance pc instruction. */
4779 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4783 size
+= size_of_set_address
;
4785 line_info
= &line_info_table
[lt_index
];
4786 if (line_info
->dw_file_num
!= current_file
)
4788 /* Set file number instruction. */
4790 current_file
= line_info
->dw_file_num
;
4791 size
+= size_of_uleb128 (current_file
);
4794 if (line_info
->dw_line_num
!= current_line
)
4796 line_offset
= line_info
->dw_line_num
- current_line
;
4797 line_delta
= line_offset
- DWARF_LINE_BASE
;
4798 current_line
= line_info
->dw_line_num
;
4799 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
4800 /* 1-byte special line number instruction. */
4804 /* Advance line instruction. */
4806 size
+= size_of_sleb128 (line_offset
);
4807 /* Generate line entry instruction. */
4813 /* Advance pc instruction. */
4817 size
+= size_of_set_address
;
4819 /* End of line number info. marker. */
4820 size
+= 1 + size_of_uleb128 (1) + 1;
4825 for (lt_index
= 0; lt_index
< separate_line_info_table_in_use
; )
4827 register dw_separate_line_info_ref line_info
4828 = &separate_line_info_table
[lt_index
];
4829 if (function
!= line_info
->function
)
4831 function
= line_info
->function
;
4832 /* Set address register instruction. */
4833 size
+= size_of_set_address
;
4837 /* Advance pc instruction. */
4841 size
+= size_of_set_address
;
4844 if (line_info
->dw_file_num
!= current_file
)
4846 /* Set file number instruction. */
4848 current_file
= line_info
->dw_file_num
;
4849 size
+= size_of_uleb128 (current_file
);
4852 if (line_info
->dw_line_num
!= current_line
)
4854 line_offset
= line_info
->dw_line_num
- current_line
;
4855 line_delta
= line_offset
- DWARF_LINE_BASE
;
4856 current_line
= line_info
->dw_line_num
;
4857 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
4858 /* 1-byte special line number instruction. */
4862 /* Advance line instruction. */
4864 size
+= size_of_sleb128 (line_offset
);
4866 /* Generate line entry instruction. */
4873 /* If we're done with a function, end its sequence. */
4874 if (lt_index
== separate_line_info_table_in_use
4875 || separate_line_info_table
[lt_index
].function
!= function
)
4880 /* Advance pc instruction. */
4884 size
+= size_of_set_address
;
4886 /* End of line number info. marker. */
4887 size
+= 1 + size_of_uleb128 (1) + 1;
4894 /* Return the size of the .debug_pubnames table generated for the
4895 compilation unit. */
4897 static unsigned long
4900 register unsigned long size
;
4901 register unsigned i
;
4903 size
= DWARF_PUBNAMES_HEADER_SIZE
;
4904 for (i
= 0; i
< pubname_table_in_use
; ++i
)
4906 register pubname_ref p
= &pubname_table
[i
];
4907 size
+= DWARF_OFFSET_SIZE
+ size_of_string (p
->name
);
4910 size
+= DWARF_OFFSET_SIZE
;
4914 /* Return the size of the information in the .debug_aranges section. */
4916 static unsigned long
4919 register unsigned long size
;
4921 size
= DWARF_ARANGES_HEADER_SIZE
;
4923 /* Count the address/length pair for this compilation unit. */
4924 size
+= 2 * PTR_SIZE
;
4925 size
+= 2 * PTR_SIZE
* arange_table_in_use
;
4927 /* Count the two zero words used to terminated the address range table. */
4928 size
+= 2 * PTR_SIZE
;
4932 /* Select the encoding of an attribute value. */
4934 static enum dwarf_form
4938 switch (v
->val_class
)
4940 case dw_val_class_addr
:
4941 return DW_FORM_addr
;
4942 case dw_val_class_loc
:
4943 switch (constant_size (size_of_locs (v
->v
.val_loc
)))
4946 return DW_FORM_block1
;
4948 return DW_FORM_block2
;
4952 case dw_val_class_const
:
4953 return DW_FORM_data4
;
4954 case dw_val_class_unsigned_const
:
4955 switch (constant_size (v
->v
.val_unsigned
))
4958 return DW_FORM_data1
;
4960 return DW_FORM_data2
;
4962 return DW_FORM_data4
;
4964 return DW_FORM_data8
;
4968 case dw_val_class_long_long
:
4969 return DW_FORM_block1
;
4970 case dw_val_class_float
:
4971 return DW_FORM_block1
;
4972 case dw_val_class_flag
:
4973 return DW_FORM_flag
;
4974 case dw_val_class_die_ref
:
4976 case dw_val_class_fde_ref
:
4977 return DW_FORM_data
;
4978 case dw_val_class_lbl_id
:
4979 return DW_FORM_addr
;
4980 case dw_val_class_section_offset
:
4981 return DW_FORM_data
;
4982 case dw_val_class_str
:
4983 return DW_FORM_string
;
4989 /* Output the encoding of an attribute value. */
4992 output_value_format (v
)
4995 enum dwarf_form form
= value_format (v
);
4997 output_uleb128 (form
);
4999 fprintf (asm_out_file
, " (%s)", dwarf_form_name (form
));
5001 fputc ('\n', asm_out_file
);
5004 /* Output the .debug_abbrev section which defines the DIE abbreviation
5008 output_abbrev_section ()
5010 unsigned long abbrev_id
;
5013 for (abbrev_id
= 1; abbrev_id
< abbrev_die_table_in_use
; ++abbrev_id
)
5015 register dw_die_ref abbrev
= abbrev_die_table
[abbrev_id
];
5017 output_uleb128 (abbrev_id
);
5019 fprintf (asm_out_file
, " (abbrev code)");
5021 fputc ('\n', asm_out_file
);
5022 output_uleb128 (abbrev
->die_tag
);
5024 fprintf (asm_out_file
, " (TAG: %s)",
5025 dwarf_tag_name (abbrev
->die_tag
));
5027 fputc ('\n', asm_out_file
);
5028 fprintf (asm_out_file
, "\t%s\t0x%x", ASM_BYTE_OP
,
5029 abbrev
->die_child
!= NULL
? DW_children_yes
: DW_children_no
);
5032 fprintf (asm_out_file
, "\t%s %s",
5034 (abbrev
->die_child
!= NULL
5035 ? "DW_children_yes" : "DW_children_no"));
5037 fputc ('\n', asm_out_file
);
5039 for (a_attr
= abbrev
->die_attr
; a_attr
!= NULL
;
5040 a_attr
= a_attr
->dw_attr_next
)
5042 output_uleb128 (a_attr
->dw_attr
);
5044 fprintf (asm_out_file
, " (%s)",
5045 dwarf_attr_name (a_attr
->dw_attr
));
5047 fputc ('\n', asm_out_file
);
5048 output_value_format (&a_attr
->dw_attr_val
);
5051 fprintf (asm_out_file
, "\t%s\t0,0\n", ASM_BYTE_OP
);
5055 /* Output location description stack opcode's operands (if any). */
5058 output_loc_operands (loc
)
5059 register dw_loc_descr_ref loc
;
5061 register dw_val_ref val1
= &loc
->dw_loc_oprnd1
;
5062 register dw_val_ref val2
= &loc
->dw_loc_oprnd2
;
5064 switch (loc
->dw_loc_opc
)
5067 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file
, val1
->v
.val_addr
);
5068 fputc ('\n', asm_out_file
);
5072 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_flag
);
5073 fputc ('\n', asm_out_file
);
5077 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, val1
->v
.val_int
);
5078 fputc ('\n', asm_out_file
);
5082 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, val1
->v
.val_int
);
5083 fputc ('\n', asm_out_file
);
5088 fputc ('\n', asm_out_file
);
5091 output_uleb128 (val1
->v
.val_unsigned
);
5092 fputc ('\n', asm_out_file
);
5095 output_sleb128 (val1
->v
.val_int
);
5096 fputc ('\n', asm_out_file
);
5099 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_int
);
5100 fputc ('\n', asm_out_file
);
5102 case DW_OP_plus_uconst
:
5103 output_uleb128 (val1
->v
.val_unsigned
);
5104 fputc ('\n', asm_out_file
);
5108 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, val1
->v
.val_int
);
5109 fputc ('\n', asm_out_file
);
5143 output_sleb128 (val1
->v
.val_int
);
5144 fputc ('\n', asm_out_file
);
5147 output_uleb128 (val1
->v
.val_unsigned
);
5148 fputc ('\n', asm_out_file
);
5151 output_sleb128 (val1
->v
.val_int
);
5152 fputc ('\n', asm_out_file
);
5155 output_uleb128 (val1
->v
.val_unsigned
);
5156 fputc ('\n', asm_out_file
);
5157 output_sleb128 (val2
->v
.val_int
);
5158 fputc ('\n', asm_out_file
);
5161 output_uleb128 (val1
->v
.val_unsigned
);
5162 fputc ('\n', asm_out_file
);
5164 case DW_OP_deref_size
:
5165 case DW_OP_xderef_size
:
5166 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_flag
);
5167 fputc ('\n', asm_out_file
);
5174 /* Compute the offset of a sibling. */
5176 static unsigned long
5177 sibling_offset (die
)
5180 unsigned long offset
;
5182 if (die
->die_child_last
== NULL
)
5183 offset
= die
->die_offset
+ size_of_die (die
);
5185 offset
= sibling_offset (die
->die_child_last
) + 1;
5190 /* Output the DIE and its attributes. Called recursively to generate
5191 the definitions of each child DIE. */
5195 register dw_die_ref die
;
5197 register dw_attr_ref a
;
5198 register dw_die_ref c
;
5199 register unsigned long ref_offset
;
5200 register unsigned long size
;
5201 register dw_loc_descr_ref loc
;
5203 output_uleb128 (die
->die_abbrev
);
5205 fprintf (asm_out_file
, " (DIE (0x%lx) %s)",
5206 die
->die_offset
, dwarf_tag_name (die
->die_tag
));
5208 fputc ('\n', asm_out_file
);
5210 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
5212 switch (a
->dw_attr_val
.val_class
)
5214 case dw_val_class_addr
:
5215 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file
,
5216 a
->dw_attr_val
.v
.val_addr
);
5219 case dw_val_class_loc
:
5220 size
= size_of_locs (a
->dw_attr_val
.v
.val_loc
);
5222 /* Output the block length for this list of location operations. */
5223 switch (constant_size (size
))
5226 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, size
);
5229 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, size
);
5236 fprintf (asm_out_file
, "\t%s %s",
5237 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5239 fputc ('\n', asm_out_file
);
5240 for (loc
= a
->dw_attr_val
.v
.val_loc
; loc
!= NULL
;
5241 loc
= loc
->dw_loc_next
)
5243 /* Output the opcode. */
5244 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, loc
->dw_loc_opc
);
5246 fprintf (asm_out_file
, "\t%s %s", ASM_COMMENT_START
,
5247 dwarf_stack_op_name (loc
->dw_loc_opc
));
5249 fputc ('\n', asm_out_file
);
5251 /* Output the operand(s) (if any). */
5252 output_loc_operands (loc
);
5256 case dw_val_class_const
:
5257 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, a
->dw_attr_val
.v
.val_int
);
5260 case dw_val_class_unsigned_const
:
5261 switch (constant_size (a
->dw_attr_val
.v
.val_unsigned
))
5264 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5265 a
->dw_attr_val
.v
.val_unsigned
);
5268 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
,
5269 a
->dw_attr_val
.v
.val_unsigned
);
5272 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
,
5273 a
->dw_attr_val
.v
.val_unsigned
);
5276 ASM_OUTPUT_DWARF_DATA8 (asm_out_file
,
5277 a
->dw_attr_val
.v
.val_long_long
.hi
,
5278 a
->dw_attr_val
.v
.val_long_long
.low
);
5285 case dw_val_class_long_long
:
5286 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 8);
5288 fprintf (asm_out_file
, "\t%s %s",
5289 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5291 fputc ('\n', asm_out_file
);
5292 ASM_OUTPUT_DWARF_DATA8 (asm_out_file
,
5293 a
->dw_attr_val
.v
.val_long_long
.hi
,
5294 a
->dw_attr_val
.v
.val_long_long
.low
);
5297 fprintf (asm_out_file
,
5298 "\t%s long long constant", ASM_COMMENT_START
);
5300 fputc ('\n', asm_out_file
);
5303 case dw_val_class_float
:
5305 register unsigned int i
;
5306 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5307 a
->dw_attr_val
.v
.val_float
.length
* 4);
5309 fprintf (asm_out_file
, "\t%s %s",
5310 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5312 fputc ('\n', asm_out_file
);
5313 for (i
= 0; i
< a
->dw_attr_val
.v
.val_float
.length
; ++i
)
5315 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
,
5316 a
->dw_attr_val
.v
.val_float
.array
[i
]);
5318 fprintf (asm_out_file
, "\t%s fp constant word %u",
5319 ASM_COMMENT_START
, i
);
5321 fputc ('\n', asm_out_file
);
5326 case dw_val_class_flag
:
5327 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, a
->dw_attr_val
.v
.val_flag
);
5330 case dw_val_class_die_ref
:
5331 if (a
->dw_attr_val
.v
.val_die_ref
!= NULL
)
5332 ref_offset
= a
->dw_attr_val
.v
.val_die_ref
->die_offset
;
5333 else if (a
->dw_attr
== DW_AT_sibling
)
5334 ref_offset
= sibling_offset(die
);
5338 ASM_OUTPUT_DWARF_DATA (asm_out_file
, ref_offset
);
5341 case dw_val_class_fde_ref
:
5344 ASM_GENERATE_INTERNAL_LABEL
5345 (l1
, FDE_AFTER_SIZE_LABEL
, a
->dw_attr_val
.v
.val_fde_index
* 2);
5346 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, l1
);
5347 fprintf (asm_out_file
, " - %d", DWARF_OFFSET_SIZE
);
5351 case dw_val_class_lbl_id
:
5352 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, a
->dw_attr_val
.v
.val_lbl_id
);
5355 case dw_val_class_section_offset
:
5356 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
,
5358 (a
->dw_attr_val
.v
.val_section
));
5361 case dw_val_class_str
:
5363 ASM_OUTPUT_DWARF_STRING (asm_out_file
, a
->dw_attr_val
.v
.val_str
);
5365 ASM_OUTPUT_ASCII (asm_out_file
,
5366 a
->dw_attr_val
.v
.val_str
,
5367 (int) strlen (a
->dw_attr_val
.v
.val_str
) + 1);
5374 if (a
->dw_attr_val
.val_class
!= dw_val_class_loc
5375 && a
->dw_attr_val
.val_class
!= dw_val_class_long_long
5376 && a
->dw_attr_val
.val_class
!= dw_val_class_float
)
5379 fprintf (asm_out_file
, "\t%s %s",
5380 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5382 fputc ('\n', asm_out_file
);
5386 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
5389 if (die
->die_child
!= NULL
)
5391 /* Add null byte to terminate sibling list. */
5392 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5394 fprintf (asm_out_file
, "\t%s end of children of DIE 0x%lx",
5395 ASM_COMMENT_START
, die
->die_offset
);
5397 fputc ('\n', asm_out_file
);
5401 /* Output the compilation unit that appears at the beginning of the
5402 .debug_info section, and precedes the DIE descriptions. */
5405 output_compilation_unit_header ()
5407 ASM_OUTPUT_DWARF_DATA (asm_out_file
, next_die_offset
- DWARF_OFFSET_SIZE
);
5409 fprintf (asm_out_file
, "\t%s Length of Compilation Unit Info.",
5412 fputc ('\n', asm_out_file
);
5413 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5415 fprintf (asm_out_file
, "\t%s DWARF version number", ASM_COMMENT_START
);
5417 fputc ('\n', asm_out_file
);
5418 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (ABBREV_SECTION
));
5420 fprintf (asm_out_file
, "\t%s Offset Into Abbrev. Section",
5423 fputc ('\n', asm_out_file
);
5424 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, PTR_SIZE
);
5426 fprintf (asm_out_file
, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START
);
5428 fputc ('\n', asm_out_file
);
5431 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5432 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5433 argument list, and maybe the scope. */
5436 dwarf2_name (decl
, scope
)
5440 return (*decl_printable_name
) (decl
, scope
? 1 : 0);
5443 /* Add a new entry to .debug_pubnames if appropriate. */
5446 add_pubname (decl
, die
)
5452 if (! TREE_PUBLIC (decl
))
5455 if (pubname_table_in_use
== pubname_table_allocated
)
5457 pubname_table_allocated
+= PUBNAME_TABLE_INCREMENT
;
5458 pubname_table
= (pubname_ref
) xrealloc
5459 (pubname_table
, pubname_table_allocated
* sizeof (pubname_entry
));
5462 p
= &pubname_table
[pubname_table_in_use
++];
5465 p
->name
= xstrdup (dwarf2_name (decl
, 1));
5468 /* Output the public names table used to speed up access to externally
5469 visible names. For now, only generate entries for externally
5470 visible procedures. */
5475 register unsigned i
;
5476 register unsigned long pubnames_length
= size_of_pubnames ();
5478 ASM_OUTPUT_DWARF_DATA (asm_out_file
, pubnames_length
);
5481 fprintf (asm_out_file
, "\t%s Length of Public Names Info.",
5484 fputc ('\n', asm_out_file
);
5485 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5488 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5490 fputc ('\n', asm_out_file
);
5491 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (DEBUG_INFO_SECTION
));
5493 fprintf (asm_out_file
, "\t%s Offset of Compilation Unit Info.",
5496 fputc ('\n', asm_out_file
);
5497 ASM_OUTPUT_DWARF_DATA (asm_out_file
, next_die_offset
);
5499 fprintf (asm_out_file
, "\t%s Compilation Unit Length", ASM_COMMENT_START
);
5501 fputc ('\n', asm_out_file
);
5502 for (i
= 0; i
< pubname_table_in_use
; ++i
)
5504 register pubname_ref pub
= &pubname_table
[i
];
5506 ASM_OUTPUT_DWARF_DATA (asm_out_file
, pub
->die
->die_offset
);
5508 fprintf (asm_out_file
, "\t%s DIE offset", ASM_COMMENT_START
);
5510 fputc ('\n', asm_out_file
);
5514 ASM_OUTPUT_DWARF_STRING (asm_out_file
, pub
->name
);
5515 fprintf (asm_out_file
, "%s external name", ASM_COMMENT_START
);
5519 ASM_OUTPUT_ASCII (asm_out_file
, pub
->name
,
5520 (int) strlen (pub
->name
) + 1);
5523 fputc ('\n', asm_out_file
);
5526 ASM_OUTPUT_DWARF_DATA (asm_out_file
, 0);
5527 fputc ('\n', asm_out_file
);
5530 /* Add a new entry to .debug_aranges if appropriate. */
5533 add_arange (decl
, die
)
5537 if (! DECL_SECTION_NAME (decl
))
5540 if (arange_table_in_use
== arange_table_allocated
)
5542 arange_table_allocated
+= ARANGE_TABLE_INCREMENT
;
5544 = (arange_ref
) xrealloc (arange_table
,
5545 arange_table_allocated
* sizeof (dw_die_ref
));
5548 arange_table
[arange_table_in_use
++] = die
;
5551 /* Output the information that goes into the .debug_aranges table.
5552 Namely, define the beginning and ending address range of the
5553 text section generated for this compilation unit. */
5558 register unsigned i
;
5559 register unsigned long aranges_length
= size_of_aranges ();
5561 ASM_OUTPUT_DWARF_DATA (asm_out_file
, aranges_length
);
5563 fprintf (asm_out_file
, "\t%s Length of Address Ranges Info.",
5566 fputc ('\n', asm_out_file
);
5567 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5569 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5571 fputc ('\n', asm_out_file
);
5572 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (DEBUG_INFO_SECTION
));
5574 fprintf (asm_out_file
, "\t%s Offset of Compilation Unit Info.",
5577 fputc ('\n', asm_out_file
);
5578 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, PTR_SIZE
);
5580 fprintf (asm_out_file
, "\t%s Size of Address", ASM_COMMENT_START
);
5582 fputc ('\n', asm_out_file
);
5583 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5585 fprintf (asm_out_file
, "\t%s Size of Segment Descriptor",
5588 fputc ('\n', asm_out_file
);
5589 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 4);
5591 fprintf (asm_out_file
, ",0,0");
5594 fprintf (asm_out_file
, "\t%s Pad to %d byte boundary",
5595 ASM_COMMENT_START
, 2 * PTR_SIZE
);
5597 fputc ('\n', asm_out_file
);
5598 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, stripattributes (TEXT_SECTION
));
5600 fprintf (asm_out_file
, "\t%s Address", ASM_COMMENT_START
);
5602 fputc ('\n', asm_out_file
);
5603 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
, text_end_label
,
5604 stripattributes (TEXT_SECTION
));
5606 fprintf (asm_out_file
, "%s Length", ASM_COMMENT_START
);
5608 fputc ('\n', asm_out_file
);
5609 for (i
= 0; i
< arange_table_in_use
; ++i
)
5611 dw_die_ref a
= arange_table
[i
];
5613 if (a
->die_tag
== DW_TAG_subprogram
)
5614 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, get_AT_low_pc (a
));
5617 char *name
= get_AT_string (a
, DW_AT_MIPS_linkage_name
);
5619 name
= get_AT_string (a
, DW_AT_name
);
5621 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, name
);
5625 fprintf (asm_out_file
, "\t%s Address", ASM_COMMENT_START
);
5627 fputc ('\n', asm_out_file
);
5628 if (a
->die_tag
== DW_TAG_subprogram
)
5629 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
, get_AT_hi_pc (a
),
5632 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
,
5633 get_AT_unsigned (a
, DW_AT_byte_size
));
5636 fprintf (asm_out_file
, "%s Length", ASM_COMMENT_START
);
5638 fputc ('\n', asm_out_file
);
5641 /* Output the terminator words. */
5642 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
, 0);
5643 fputc ('\n', asm_out_file
);
5644 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
, 0);
5645 fputc ('\n', asm_out_file
);
5648 /* Output the source line number correspondence information. This
5649 information goes into the .debug_line section.
5651 If the format of this data changes, then the function size_of_line_info
5652 must also be adjusted the same way. */
5657 char line_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
5658 char prev_line_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
5659 register unsigned opc
;
5660 register unsigned n_op_args
;
5661 register unsigned long ft_index
;
5662 register unsigned long lt_index
;
5663 register unsigned long current_line
;
5664 register long line_offset
;
5665 register long line_delta
;
5666 register unsigned long current_file
;
5667 register unsigned long function
;
5669 ASM_OUTPUT_DWARF_DATA (asm_out_file
, size_of_line_info ());
5671 fprintf (asm_out_file
, "\t%s Length of Source Line Info.",
5674 fputc ('\n', asm_out_file
);
5675 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5677 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5679 fputc ('\n', asm_out_file
);
5680 ASM_OUTPUT_DWARF_DATA (asm_out_file
, size_of_line_prolog ());
5682 fprintf (asm_out_file
, "\t%s Prolog Length", ASM_COMMENT_START
);
5684 fputc ('\n', asm_out_file
);
5685 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_LINE_MIN_INSTR_LENGTH
);
5687 fprintf (asm_out_file
, "\t%s Minimum Instruction Length",
5690 fputc ('\n', asm_out_file
);
5691 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_LINE_DEFAULT_IS_STMT_START
);
5693 fprintf (asm_out_file
, "\t%s Default is_stmt_start flag",
5696 fputc ('\n', asm_out_file
);
5697 fprintf (asm_out_file
, "\t%s\t%d", ASM_BYTE_OP
, DWARF_LINE_BASE
);
5699 fprintf (asm_out_file
, "\t%s Line Base Value (Special Opcodes)",
5702 fputc ('\n', asm_out_file
);
5703 fprintf (asm_out_file
, "\t%s\t%u", ASM_BYTE_OP
, DWARF_LINE_RANGE
);
5705 fprintf (asm_out_file
, "\t%s Line Range Value (Special Opcodes)",
5708 fputc ('\n', asm_out_file
);
5709 fprintf (asm_out_file
, "\t%s\t%u", ASM_BYTE_OP
, DWARF_LINE_OPCODE_BASE
);
5711 fprintf (asm_out_file
, "\t%s Special Opcode Base", ASM_COMMENT_START
);
5713 fputc ('\n', asm_out_file
);
5714 for (opc
= 1; opc
< DWARF_LINE_OPCODE_BASE
; ++opc
)
5718 case DW_LNS_advance_pc
:
5719 case DW_LNS_advance_line
:
5720 case DW_LNS_set_file
:
5721 case DW_LNS_set_column
:
5722 case DW_LNS_fixed_advance_pc
:
5729 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, n_op_args
);
5731 fprintf (asm_out_file
, "\t%s opcode: 0x%x has %d args",
5732 ASM_COMMENT_START
, opc
, n_op_args
);
5733 fputc ('\n', asm_out_file
);
5737 fprintf (asm_out_file
, "%s Include Directory Table\n", ASM_COMMENT_START
);
5739 /* Include directory table is empty, at present */
5740 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5741 fputc ('\n', asm_out_file
);
5743 fprintf (asm_out_file
, "%s File Name Table\n", ASM_COMMENT_START
);
5745 for (ft_index
= 1; ft_index
< file_table_in_use
; ++ft_index
)
5749 ASM_OUTPUT_DWARF_STRING (asm_out_file
, file_table
[ft_index
]);
5750 fprintf (asm_out_file
, "%s File Entry: 0x%lx",
5751 ASM_COMMENT_START
, ft_index
);
5755 ASM_OUTPUT_ASCII (asm_out_file
,
5756 file_table
[ft_index
],
5757 (int) strlen (file_table
[ft_index
]) + 1);
5760 fputc ('\n', asm_out_file
);
5762 /* Include directory index */
5764 fputc ('\n', asm_out_file
);
5766 /* Modification time */
5768 fputc ('\n', asm_out_file
);
5770 /* File length in bytes */
5772 fputc ('\n', asm_out_file
);
5775 /* Terminate the file name table */
5776 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5777 fputc ('\n', asm_out_file
);
5779 /* Set the address register to the first location in the text section */
5780 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5782 fprintf (asm_out_file
, "\t%s DW_LNE_set_address", ASM_COMMENT_START
);
5784 fputc ('\n', asm_out_file
);
5785 output_uleb128 (1 + PTR_SIZE
);
5786 fputc ('\n', asm_out_file
);
5787 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5788 fputc ('\n', asm_out_file
);
5789 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, stripattributes (TEXT_SECTION
));
5790 fputc ('\n', asm_out_file
);
5792 /* Generate the line number to PC correspondence table, encoded as
5793 a series of state machine operations. */
5796 strcpy (prev_line_label
, stripattributes (TEXT_SECTION
));
5797 for (lt_index
= 1; lt_index
< line_info_table_in_use
; ++lt_index
)
5799 register dw_line_info_ref line_info
;
5801 /* Emit debug info for the address of the current line, choosing
5802 the encoding that uses the least amount of space. */
5803 /* ??? Unfortunately, we have little choice here currently, and must
5804 always use the most general form. Gcc does not know the address
5805 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5806 dwarf2 aware assemblers at this time, so we can't use any special
5807 pseudo ops that would allow the assembler to optimally encode this for
5808 us. Many ports do have length attributes which will give an upper
5809 bound on the address range. We could perhaps use length attributes
5810 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5811 ASM_GENERATE_INTERNAL_LABEL (line_label
, LINE_CODE_LABEL
, lt_index
);
5814 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5815 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5817 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5820 fputc ('\n', asm_out_file
);
5821 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
, prev_line_label
);
5822 fputc ('\n', asm_out_file
);
5826 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5827 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5829 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5831 fputc ('\n', asm_out_file
);
5832 output_uleb128 (1 + PTR_SIZE
);
5833 fputc ('\n', asm_out_file
);
5834 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5835 fputc ('\n', asm_out_file
);
5836 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5837 fputc ('\n', asm_out_file
);
5839 strcpy (prev_line_label
, line_label
);
5841 /* Emit debug info for the source file of the current line, if
5842 different from the previous line. */
5843 line_info
= &line_info_table
[lt_index
];
5844 if (line_info
->dw_file_num
!= current_file
)
5846 current_file
= line_info
->dw_file_num
;
5847 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_set_file
);
5849 fprintf (asm_out_file
, "\t%s DW_LNS_set_file", ASM_COMMENT_START
);
5851 fputc ('\n', asm_out_file
);
5852 output_uleb128 (current_file
);
5854 fprintf (asm_out_file
, " (\"%s\")", file_table
[current_file
]);
5856 fputc ('\n', asm_out_file
);
5859 /* Emit debug info for the current line number, choosing the encoding
5860 that uses the least amount of space. */
5861 line_offset
= line_info
->dw_line_num
- current_line
;
5862 line_delta
= line_offset
- DWARF_LINE_BASE
;
5863 current_line
= line_info
->dw_line_num
;
5864 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
5866 /* This can handle deltas from -10 to 234, using the current
5867 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5869 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5870 DWARF_LINE_OPCODE_BASE
+ line_delta
);
5872 fprintf (asm_out_file
,
5873 "\t%s line %ld", ASM_COMMENT_START
, current_line
);
5875 fputc ('\n', asm_out_file
);
5879 /* This can handle any delta. This takes at least 4 bytes, depending
5880 on the value being encoded. */
5881 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_advance_line
);
5883 fprintf (asm_out_file
, "\t%s advance to line %ld",
5884 ASM_COMMENT_START
, current_line
);
5886 fputc ('\n', asm_out_file
);
5887 output_sleb128 (line_offset
);
5888 fputc ('\n', asm_out_file
);
5889 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_copy
);
5890 fputc ('\n', asm_out_file
);
5894 /* Emit debug info for the address of the end of the function. */
5897 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5899 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5902 fputc ('\n', asm_out_file
);
5903 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, text_end_label
, prev_line_label
);
5904 fputc ('\n', asm_out_file
);
5908 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5910 fprintf (asm_out_file
, "\t%s DW_LNE_set_address", ASM_COMMENT_START
);
5911 fputc ('\n', asm_out_file
);
5912 output_uleb128 (1 + PTR_SIZE
);
5913 fputc ('\n', asm_out_file
);
5914 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5915 fputc ('\n', asm_out_file
);
5916 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, text_end_label
);
5917 fputc ('\n', asm_out_file
);
5920 /* Output the marker for the end of the line number info. */
5921 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5923 fprintf (asm_out_file
, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START
);
5925 fputc ('\n', asm_out_file
);
5927 fputc ('\n', asm_out_file
);
5928 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_end_sequence
);
5929 fputc ('\n', asm_out_file
);
5934 for (lt_index
= 0; lt_index
< separate_line_info_table_in_use
; )
5936 register dw_separate_line_info_ref line_info
5937 = &separate_line_info_table
[lt_index
];
5939 /* Emit debug info for the address of the current line. If this is
5940 a new function, or the first line of a function, then we need
5941 to handle it differently. */
5942 ASM_GENERATE_INTERNAL_LABEL (line_label
, SEPARATE_LINE_CODE_LABEL
,
5944 if (function
!= line_info
->function
)
5946 function
= line_info
->function
;
5948 /* Set the address register to the first line in the function */
5949 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5951 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5954 fputc ('\n', asm_out_file
);
5955 output_uleb128 (1 + PTR_SIZE
);
5956 fputc ('\n', asm_out_file
);
5957 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5958 fputc ('\n', asm_out_file
);
5959 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5960 fputc ('\n', asm_out_file
);
5964 /* ??? See the DW_LNS_advance_pc comment above. */
5967 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5969 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5972 fputc ('\n', asm_out_file
);
5973 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
,
5975 fputc ('\n', asm_out_file
);
5979 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5981 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5983 fputc ('\n', asm_out_file
);
5984 output_uleb128 (1 + PTR_SIZE
);
5985 fputc ('\n', asm_out_file
);
5986 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5987 fputc ('\n', asm_out_file
);
5988 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5989 fputc ('\n', asm_out_file
);
5992 strcpy (prev_line_label
, line_label
);
5994 /* Emit debug info for the source file of the current line, if
5995 different from the previous line. */
5996 if (line_info
->dw_file_num
!= current_file
)
5998 current_file
= line_info
->dw_file_num
;
5999 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_set_file
);
6001 fprintf (asm_out_file
, "\t%s DW_LNS_set_file", ASM_COMMENT_START
);
6003 fputc ('\n', asm_out_file
);
6004 output_uleb128 (current_file
);
6006 fprintf (asm_out_file
, " (\"%s\")", file_table
[current_file
]);
6008 fputc ('\n', asm_out_file
);
6011 /* Emit debug info for the current line number, choosing the encoding
6012 that uses the least amount of space. */
6013 if (line_info
->dw_line_num
!= current_line
)
6015 line_offset
= line_info
->dw_line_num
- current_line
;
6016 line_delta
= line_offset
- DWARF_LINE_BASE
;
6017 current_line
= line_info
->dw_line_num
;
6018 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
6020 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
6021 DWARF_LINE_OPCODE_BASE
+ line_delta
);
6023 fprintf (asm_out_file
,
6024 "\t%s line %ld", ASM_COMMENT_START
, current_line
);
6026 fputc ('\n', asm_out_file
);
6030 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_advance_line
);
6032 fprintf (asm_out_file
, "\t%s advance to line %ld",
6033 ASM_COMMENT_START
, current_line
);
6035 fputc ('\n', asm_out_file
);
6036 output_sleb128 (line_offset
);
6037 fputc ('\n', asm_out_file
);
6038 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_copy
);
6039 fputc ('\n', asm_out_file
);
6045 /* If we're done with a function, end its sequence. */
6046 if (lt_index
== separate_line_info_table_in_use
6047 || separate_line_info_table
[lt_index
].function
!= function
)
6052 /* Emit debug info for the address of the end of the function. */
6053 ASM_GENERATE_INTERNAL_LABEL (line_label
, FUNC_END_LABEL
, function
);
6056 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
6058 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
6061 fputc ('\n', asm_out_file
);
6062 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
,
6064 fputc ('\n', asm_out_file
);
6068 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
6070 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
6072 fputc ('\n', asm_out_file
);
6073 output_uleb128 (1 + PTR_SIZE
);
6074 fputc ('\n', asm_out_file
);
6075 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
6076 fputc ('\n', asm_out_file
);
6077 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
6078 fputc ('\n', asm_out_file
);
6081 /* Output the marker for the end of this sequence. */
6082 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
6084 fprintf (asm_out_file
, "\t%s DW_LNE_end_sequence",
6087 fputc ('\n', asm_out_file
);
6089 fputc ('\n', asm_out_file
);
6090 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_end_sequence
);
6091 fputc ('\n', asm_out_file
);
6096 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6097 in question represents the outermost pair of curly braces (i.e. the "body
6098 block") of a function or method.
6100 For any BLOCK node representing a "body block" of a function or method, the
6101 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6102 represents the outermost (function) scope for the function or method (i.e.
6103 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6104 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6107 is_body_block (stmt
)
6110 if (TREE_CODE (stmt
) == BLOCK
)
6112 register tree parent
= BLOCK_SUPERCONTEXT (stmt
);
6114 if (TREE_CODE (parent
) == BLOCK
)
6116 register tree grandparent
= BLOCK_SUPERCONTEXT (parent
);
6118 if (TREE_CODE (grandparent
) == FUNCTION_DECL
)
6126 /* Given a pointer to a tree node for some base type, return a pointer to
6127 a DIE that describes the given type.
6129 This routine must only be called for GCC type nodes that correspond to
6130 Dwarf base (fundamental) types. */
6133 base_type_die (type
)
6136 register dw_die_ref base_type_result
;
6137 register char *type_name
;
6138 register enum dwarf_type encoding
;
6139 register tree name
= TYPE_NAME (type
);
6141 if (TREE_CODE (type
) == ERROR_MARK
6142 || TREE_CODE (type
) == VOID_TYPE
)
6145 if (TREE_CODE (name
) == TYPE_DECL
)
6146 name
= DECL_NAME (name
);
6147 type_name
= IDENTIFIER_POINTER (name
);
6149 switch (TREE_CODE (type
))
6152 /* Carefully distinguish the C character types, without messing
6153 up if the language is not C. Note that we check only for the names
6154 that contain spaces; other names might occur by coincidence in other
6156 if (! (TYPE_PRECISION (type
) == CHAR_TYPE_SIZE
6157 && (type
== char_type_node
6158 || ! strcmp (type_name
, "signed char")
6159 || ! strcmp (type_name
, "unsigned char"))))
6161 if (TREE_UNSIGNED (type
))
6162 encoding
= DW_ATE_unsigned
;
6164 encoding
= DW_ATE_signed
;
6167 /* else fall through */
6170 /* GNU Pascal/Ada CHAR type. Not used in C. */
6171 if (TREE_UNSIGNED (type
))
6172 encoding
= DW_ATE_unsigned_char
;
6174 encoding
= DW_ATE_signed_char
;
6178 encoding
= DW_ATE_float
;
6182 encoding
= DW_ATE_complex_float
;
6186 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6187 encoding
= DW_ATE_boolean
;
6191 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6194 base_type_result
= new_die (DW_TAG_base_type
, comp_unit_die
);
6195 add_AT_string (base_type_result
, DW_AT_name
, type_name
);
6196 add_AT_unsigned (base_type_result
, DW_AT_byte_size
,
6197 int_size_in_bytes (type
));
6198 add_AT_unsigned (base_type_result
, DW_AT_encoding
, encoding
);
6200 return base_type_result
;
6203 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6204 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6205 a given type is generally the same as the given type, except that if the
6206 given type is a pointer or reference type, then the root type of the given
6207 type is the root type of the "basis" type for the pointer or reference
6208 type. (This definition of the "root" type is recursive.) Also, the root
6209 type of a `const' qualified type or a `volatile' qualified type is the
6210 root type of the given type without the qualifiers. */
6216 if (TREE_CODE (type
) == ERROR_MARK
)
6217 return error_mark_node
;
6219 switch (TREE_CODE (type
))
6222 return error_mark_node
;
6225 case REFERENCE_TYPE
:
6226 return type_main_variant (root_type (TREE_TYPE (type
)));
6229 return type_main_variant (type
);
6233 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6234 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6240 switch (TREE_CODE (type
))
6255 case QUAL_UNION_TYPE
:
6260 case REFERENCE_TYPE
:
6273 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6274 entry that chains various modifiers in front of the given type. */
6277 modified_type_die (type
, is_const_type
, is_volatile_type
, context_die
)
6279 register int is_const_type
;
6280 register int is_volatile_type
;
6281 register dw_die_ref context_die
;
6283 register enum tree_code code
= TREE_CODE (type
);
6284 register dw_die_ref mod_type_die
= NULL
;
6285 register dw_die_ref sub_die
= NULL
;
6286 register tree item_type
= NULL
;
6288 if (code
!= ERROR_MARK
)
6290 type
= build_type_variant (type
, is_const_type
, is_volatile_type
);
6292 mod_type_die
= lookup_type_die (type
);
6294 return mod_type_die
;
6296 /* Handle C typedef types. */
6297 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
6298 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
6300 tree dtype
= TREE_TYPE (TYPE_NAME (type
));
6303 /* For a named type, use the typedef. */
6304 gen_type_die (type
, context_die
);
6305 mod_type_die
= lookup_type_die (type
);
6308 else if (is_const_type
< TYPE_READONLY (dtype
)
6309 || is_volatile_type
< TYPE_VOLATILE (dtype
))
6310 /* cv-unqualified version of named type. Just use the unnamed
6311 type to which it refers. */
6313 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type
)),
6314 is_const_type
, is_volatile_type
,
6316 /* Else cv-qualified version of named type; fall through. */
6321 else if (is_const_type
)
6323 mod_type_die
= new_die (DW_TAG_const_type
, comp_unit_die
);
6324 sub_die
= modified_type_die (type
, 0, is_volatile_type
, context_die
);
6326 else if (is_volatile_type
)
6328 mod_type_die
= new_die (DW_TAG_volatile_type
, comp_unit_die
);
6329 sub_die
= modified_type_die (type
, 0, 0, context_die
);
6331 else if (code
== POINTER_TYPE
)
6333 mod_type_die
= new_die (DW_TAG_pointer_type
, comp_unit_die
);
6334 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
6336 add_AT_unsigned (mod_type_die
, DW_AT_address_class
, 0);
6338 item_type
= TREE_TYPE (type
);
6340 else if (code
== REFERENCE_TYPE
)
6342 mod_type_die
= new_die (DW_TAG_reference_type
, comp_unit_die
);
6343 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
6345 add_AT_unsigned (mod_type_die
, DW_AT_address_class
, 0);
6347 item_type
= TREE_TYPE (type
);
6349 else if (is_base_type (type
))
6350 mod_type_die
= base_type_die (type
);
6353 gen_type_die (type
, context_die
);
6355 /* We have to get the type_main_variant here (and pass that to the
6356 `lookup_type_die' routine) because the ..._TYPE node we have
6357 might simply be a *copy* of some original type node (where the
6358 copy was created to help us keep track of typedef names) and
6359 that copy might have a different TYPE_UID from the original
6361 mod_type_die
= lookup_type_die (type_main_variant (type
));
6362 if (mod_type_die
== NULL
)
6367 equate_type_number_to_die (type
, mod_type_die
);
6369 /* We must do this after the equate_type_number_to_die call, in case
6370 this is a recursive type. This ensures that the modified_type_die
6371 recursion will terminate even if the type is recursive. Recursive
6372 types are possible in Ada. */
6373 sub_die
= modified_type_die (item_type
,
6374 TYPE_READONLY (item_type
),
6375 TYPE_VOLATILE (item_type
),
6378 if (sub_die
!= NULL
)
6379 add_AT_die_ref (mod_type_die
, DW_AT_type
, sub_die
);
6381 return mod_type_die
;
6384 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6385 an enumerated type. */
6391 return TREE_CODE (type
) == ENUMERAL_TYPE
;
6394 /* Return a location descriptor that designates a machine register. */
6396 static dw_loc_descr_ref
6397 reg_loc_descriptor (rtl
)
6400 register dw_loc_descr_ref loc_result
= NULL
;
6401 register unsigned reg
= reg_number (rtl
);
6404 loc_result
= new_loc_descr (DW_OP_reg0
+ reg
, 0, 0);
6406 loc_result
= new_loc_descr (DW_OP_regx
, reg
, 0);
6411 /* Return a location descriptor that designates a base+offset location. */
6413 static dw_loc_descr_ref
6414 based_loc_descr (reg
, offset
)
6418 register dw_loc_descr_ref loc_result
;
6419 /* For the "frame base", we use the frame pointer or stack pointer
6420 registers, since the RTL for local variables is relative to one of
6422 register unsigned fp_reg
= DBX_REGISTER_NUMBER (frame_pointer_needed
6423 ? HARD_FRAME_POINTER_REGNUM
6424 : STACK_POINTER_REGNUM
);
6427 loc_result
= new_loc_descr (DW_OP_fbreg
, offset
, 0);
6429 loc_result
= new_loc_descr (DW_OP_breg0
+ reg
, offset
, 0);
6431 loc_result
= new_loc_descr (DW_OP_bregx
, reg
, offset
);
6436 /* Return true if this RTL expression describes a base+offset calculation. */
6442 return (GET_CODE (rtl
) == PLUS
6443 && ((GET_CODE (XEXP (rtl
, 0)) == REG
6444 && GET_CODE (XEXP (rtl
, 1)) == CONST_INT
)));
6447 /* The following routine converts the RTL for a variable or parameter
6448 (resident in memory) into an equivalent Dwarf representation of a
6449 mechanism for getting the address of that same variable onto the top of a
6450 hypothetical "address evaluation" stack.
6452 When creating memory location descriptors, we are effectively transforming
6453 the RTL for a memory-resident object into its Dwarf postfix expression
6454 equivalent. This routine recursively descends an RTL tree, turning
6455 it into Dwarf postfix code as it goes. */
6457 static dw_loc_descr_ref
6458 mem_loc_descriptor (rtl
)
6461 dw_loc_descr_ref mem_loc_result
= NULL
;
6462 /* Note that for a dynamically sized array, the location we will generate a
6463 description of here will be the lowest numbered location which is
6464 actually within the array. That's *not* necessarily the same as the
6465 zeroth element of the array. */
6467 switch (GET_CODE (rtl
))
6470 /* The case of a subreg may arise when we have a local (register)
6471 variable or a formal (register) parameter which doesn't quite fill
6472 up an entire register. For now, just assume that it is
6473 legitimate to make the Dwarf info refer to the whole register which
6474 contains the given subreg. */
6475 rtl
= XEXP (rtl
, 0);
6477 /* ... fall through ... */
6480 /* Whenever a register number forms a part of the description of the
6481 method for calculating the (dynamic) address of a memory resident
6482 object, DWARF rules require the register number be referred to as
6483 a "base register". This distinction is not based in any way upon
6484 what category of register the hardware believes the given register
6485 belongs to. This is strictly DWARF terminology we're dealing with
6486 here. Note that in cases where the location of a memory-resident
6487 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6488 OP_CONST (0)) the actual DWARF location descriptor that we generate
6489 may just be OP_BASEREG (basereg). This may look deceptively like
6490 the object in question was allocated to a register (rather than in
6491 memory) so DWARF consumers need to be aware of the subtle
6492 distinction between OP_REG and OP_BASEREG. */
6493 mem_loc_result
= based_loc_descr (reg_number (rtl
), 0);
6497 mem_loc_result
= mem_loc_descriptor (XEXP (rtl
, 0));
6498 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_deref
, 0, 0));
6503 mem_loc_result
= new_loc_descr (DW_OP_addr
, 0, 0);
6504 mem_loc_result
->dw_loc_oprnd1
.val_class
= dw_val_class_addr
;
6505 mem_loc_result
->dw_loc_oprnd1
.v
.val_addr
= addr_to_string (rtl
);
6509 if (is_based_loc (rtl
))
6510 mem_loc_result
= based_loc_descr (reg_number (XEXP (rtl
, 0)),
6511 INTVAL (XEXP (rtl
, 1)));
6514 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 0)));
6515 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 1)));
6516 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_plus
, 0, 0));
6521 /* If a pseudo-reg is optimized away, it is possible for it to
6522 be replaced with a MEM containing a multiply. */
6523 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 0)));
6524 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 1)));
6525 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_mul
, 0, 0));
6529 mem_loc_result
= new_loc_descr (DW_OP_constu
, INTVAL (rtl
), 0);
6536 return mem_loc_result
;
6539 /* Return a descriptor that describes the concatenation of two locations.
6540 This is typically a complex variable. */
6542 static dw_loc_descr_ref
6543 concat_loc_descriptor (x0
, x1
)
6544 register rtx x0
, x1
;
6546 dw_loc_descr_ref cc_loc_result
= NULL
;
6548 if (!is_pseudo_reg (x0
)
6549 && (GET_CODE (x0
) != MEM
|| !is_pseudo_reg (XEXP (x0
, 0))))
6550 add_loc_descr (&cc_loc_result
, loc_descriptor (x0
));
6551 add_loc_descr (&cc_loc_result
,
6552 new_loc_descr (DW_OP_piece
, GET_MODE_SIZE (GET_MODE (x0
)), 0));
6554 if (!is_pseudo_reg (x1
)
6555 && (GET_CODE (x1
) != MEM
|| !is_pseudo_reg (XEXP (x1
, 0))))
6556 add_loc_descr (&cc_loc_result
, loc_descriptor (x1
));
6557 add_loc_descr (&cc_loc_result
,
6558 new_loc_descr (DW_OP_piece
, GET_MODE_SIZE (GET_MODE (x1
)), 0));
6560 return cc_loc_result
;
6563 /* Output a proper Dwarf location descriptor for a variable or parameter
6564 which is either allocated in a register or in a memory location. For a
6565 register, we just generate an OP_REG and the register number. For a
6566 memory location we provide a Dwarf postfix expression describing how to
6567 generate the (dynamic) address of the object onto the address stack. */
6569 static dw_loc_descr_ref
6570 loc_descriptor (rtl
)
6573 dw_loc_descr_ref loc_result
= NULL
;
6574 switch (GET_CODE (rtl
))
6577 /* The case of a subreg may arise when we have a local (register)
6578 variable or a formal (register) parameter which doesn't quite fill
6579 up an entire register. For now, just assume that it is
6580 legitimate to make the Dwarf info refer to the whole register which
6581 contains the given subreg. */
6582 rtl
= XEXP (rtl
, 0);
6584 /* ... fall through ... */
6587 loc_result
= reg_loc_descriptor (rtl
);
6591 loc_result
= mem_loc_descriptor (XEXP (rtl
, 0));
6595 loc_result
= concat_loc_descriptor (XEXP (rtl
, 0), XEXP (rtl
, 1));
6605 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6606 which is not less than the value itself. */
6608 static inline unsigned
6609 ceiling (value
, boundary
)
6610 register unsigned value
;
6611 register unsigned boundary
;
6613 return (((value
+ boundary
- 1) / boundary
) * boundary
);
6616 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6617 pointer to the declared type for the relevant field variable, or return
6618 `integer_type_node' if the given node turns out to be an
6627 if (TREE_CODE (decl
) == ERROR_MARK
)
6628 return integer_type_node
;
6630 type
= DECL_BIT_FIELD_TYPE (decl
);
6631 if (type
== NULL_TREE
)
6632 type
= TREE_TYPE (decl
);
6637 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6638 node, return the alignment in bits for the type, or else return
6639 BITS_PER_WORD if the node actually turns out to be an
6642 static inline unsigned
6643 simple_type_align_in_bits (type
)
6646 return (TREE_CODE (type
) != ERROR_MARK
) ? TYPE_ALIGN (type
) : BITS_PER_WORD
;
6649 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6650 node, return the size in bits for the type if it is a constant, or else
6651 return the alignment for the type if the type's size is not constant, or
6652 else return BITS_PER_WORD if the type actually turns out to be an
6655 static inline unsigned
6656 simple_type_size_in_bits (type
)
6659 if (TREE_CODE (type
) == ERROR_MARK
)
6660 return BITS_PER_WORD
;
6663 register tree type_size_tree
= TYPE_SIZE (type
);
6665 if (TREE_CODE (type_size_tree
) != INTEGER_CST
)
6666 return TYPE_ALIGN (type
);
6668 return (unsigned) TREE_INT_CST_LOW (type_size_tree
);
6672 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6673 return the byte offset of the lowest addressed byte of the "containing
6674 object" for the given FIELD_DECL, or return 0 if we are unable to
6675 determine what that offset is, either because the argument turns out to
6676 be a pointer to an ERROR_MARK node, or because the offset is actually
6677 variable. (We can't handle the latter case just yet). */
6680 field_byte_offset (decl
)
6683 register unsigned type_align_in_bytes
;
6684 register unsigned type_align_in_bits
;
6685 register unsigned type_size_in_bits
;
6686 register unsigned object_offset_in_align_units
;
6687 register unsigned object_offset_in_bits
;
6688 register unsigned object_offset_in_bytes
;
6690 register tree bitpos_tree
;
6691 register tree field_size_tree
;
6692 register unsigned bitpos_int
;
6693 register unsigned deepest_bitpos
;
6694 register unsigned field_size_in_bits
;
6696 if (TREE_CODE (decl
) == ERROR_MARK
)
6699 if (TREE_CODE (decl
) != FIELD_DECL
)
6702 type
= field_type (decl
);
6704 bitpos_tree
= DECL_FIELD_BITPOS (decl
);
6705 field_size_tree
= DECL_SIZE (decl
);
6707 /* We cannot yet cope with fields whose positions or sizes are variable, so
6708 for now, when we see such things, we simply return 0. Someday, we may
6709 be able to handle such cases, but it will be damn difficult. */
6710 if (TREE_CODE (bitpos_tree
) != INTEGER_CST
)
6712 bitpos_int
= (unsigned) TREE_INT_CST_LOW (bitpos_tree
);
6714 if (TREE_CODE (field_size_tree
) != INTEGER_CST
)
6717 field_size_in_bits
= (unsigned) TREE_INT_CST_LOW (field_size_tree
);
6718 type_size_in_bits
= simple_type_size_in_bits (type
);
6719 type_align_in_bits
= simple_type_align_in_bits (type
);
6720 type_align_in_bytes
= type_align_in_bits
/ BITS_PER_UNIT
;
6722 /* Note that the GCC front-end doesn't make any attempt to keep track of
6723 the starting bit offset (relative to the start of the containing
6724 structure type) of the hypothetical "containing object" for a bit-
6725 field. Thus, when computing the byte offset value for the start of the
6726 "containing object" of a bit-field, we must deduce this information on
6727 our own. This can be rather tricky to do in some cases. For example,
6728 handling the following structure type definition when compiling for an
6729 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6732 struct S { int field1; long long field2:31; };
6734 Fortunately, there is a simple rule-of-thumb which can be
6735 used in such cases. When compiling for an i386/i486, GCC will allocate
6736 8 bytes for the structure shown above. It decides to do this based upon
6737 one simple rule for bit-field allocation. Quite simply, GCC allocates
6738 each "containing object" for each bit-field at the first (i.e. lowest
6739 addressed) legitimate alignment boundary (based upon the required
6740 minimum alignment for the declared type of the field) which it can
6741 possibly use, subject to the condition that there is still enough
6742 available space remaining in the containing object (when allocated at
6743 the selected point) to fully accommodate all of the bits of the
6744 bit-field itself. This simple rule makes it obvious why GCC allocates
6745 8 bytes for each object of the structure type shown above. When looking
6746 for a place to allocate the "containing object" for `field2', the
6747 compiler simply tries to allocate a 64-bit "containing object" at each
6748 successive 32-bit boundary (starting at zero) until it finds a place to
6749 allocate that 64- bit field such that at least 31 contiguous (and
6750 previously unallocated) bits remain within that selected 64 bit field.
6751 (As it turns out, for the example above, the compiler finds that it is
6752 OK to allocate the "containing object" 64-bit field at bit-offset zero
6753 within the structure type.) Here we attempt to work backwards from the
6754 limited set of facts we're given, and we try to deduce from those facts,
6755 where GCC must have believed that the containing object started (within
6756 the structure type). The value we deduce is then used (by the callers of
6757 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6758 for fields (both bit-fields and, in the case of DW_AT_location, regular
6761 /* Figure out the bit-distance from the start of the structure to the
6762 "deepest" bit of the bit-field. */
6763 deepest_bitpos
= bitpos_int
+ field_size_in_bits
;
6765 /* This is the tricky part. Use some fancy footwork to deduce where the
6766 lowest addressed bit of the containing object must be. */
6767 object_offset_in_bits
6768 = ceiling (deepest_bitpos
, type_align_in_bits
) - type_size_in_bits
;
6770 /* Compute the offset of the containing object in "alignment units". */
6771 object_offset_in_align_units
= object_offset_in_bits
/ type_align_in_bits
;
6773 /* Compute the offset of the containing object in bytes. */
6774 object_offset_in_bytes
= object_offset_in_align_units
* type_align_in_bytes
;
6776 return object_offset_in_bytes
;
6779 /* The following routines define various Dwarf attributes and any data
6780 associated with them. */
6782 /* Add a location description attribute value to a DIE.
6784 This emits location attributes suitable for whole variables and
6785 whole parameters. Note that the location attributes for struct fields are
6786 generated by the routine `data_member_location_attribute' below. */
6789 add_AT_location_description (die
, attr_kind
, rtl
)
6791 enum dwarf_attribute attr_kind
;
6794 /* Handle a special case. If we are about to output a location descriptor
6795 for a variable or parameter which has been optimized out of existence,
6796 don't do that. A variable which has been optimized out
6797 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6798 Currently, in some rare cases, variables can have DECL_RTL values which
6799 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6800 elsewhere in the compiler. We treat such cases as if the variable(s) in
6801 question had been optimized out of existence. */
6803 if (is_pseudo_reg (rtl
)
6804 || (GET_CODE (rtl
) == MEM
6805 && is_pseudo_reg (XEXP (rtl
, 0)))
6806 || (GET_CODE (rtl
) == CONCAT
6807 && is_pseudo_reg (XEXP (rtl
, 0))
6808 && is_pseudo_reg (XEXP (rtl
, 1))))
6811 add_AT_loc (die
, attr_kind
, loc_descriptor (rtl
));
6814 /* Attach the specialized form of location attribute used for data
6815 members of struct and union types. In the special case of a
6816 FIELD_DECL node which represents a bit-field, the "offset" part
6817 of this special location descriptor must indicate the distance
6818 in bytes from the lowest-addressed byte of the containing struct
6819 or union type to the lowest-addressed byte of the "containing
6820 object" for the bit-field. (See the `field_byte_offset' function
6821 above).. For any given bit-field, the "containing object" is a
6822 hypothetical object (of some integral or enum type) within which
6823 the given bit-field lives. The type of this hypothetical
6824 "containing object" is always the same as the declared type of
6825 the individual bit-field itself (for GCC anyway... the DWARF
6826 spec doesn't actually mandate this). Note that it is the size
6827 (in bytes) of the hypothetical "containing object" which will
6828 be given in the DW_AT_byte_size attribute for this bit-field.
6829 (See the `byte_size_attribute' function below.) It is also used
6830 when calculating the value of the DW_AT_bit_offset attribute.
6831 (See the `bit_offset_attribute' function below). */
6834 add_data_member_location_attribute (die
, decl
)
6835 register dw_die_ref die
;
6838 register unsigned long offset
;
6839 register dw_loc_descr_ref loc_descr
;
6840 register enum dwarf_location_atom op
;
6842 if (TREE_CODE (decl
) == TREE_VEC
)
6843 offset
= TREE_INT_CST_LOW (BINFO_OFFSET (decl
));
6845 offset
= field_byte_offset (decl
);
6847 /* The DWARF2 standard says that we should assume that the structure address
6848 is already on the stack, so we can specify a structure field address
6849 by using DW_OP_plus_uconst. */
6851 #ifdef MIPS_DEBUGGING_INFO
6852 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6853 correctly. It works only if we leave the offset on the stack. */
6856 op
= DW_OP_plus_uconst
;
6859 loc_descr
= new_loc_descr (op
, offset
, 0);
6860 add_AT_loc (die
, DW_AT_data_member_location
, loc_descr
);
6863 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6864 does not have a "location" either in memory or in a register. These
6865 things can arise in GNU C when a constant is passed as an actual parameter
6866 to an inlined function. They can also arise in C++ where declared
6867 constants do not necessarily get memory "homes". */
6870 add_const_value_attribute (die
, rtl
)
6871 register dw_die_ref die
;
6874 switch (GET_CODE (rtl
))
6877 /* Note that a CONST_INT rtx could represent either an integer or a
6878 floating-point constant. A CONST_INT is used whenever the constant
6879 will fit into a single word. In all such cases, the original mode
6880 of the constant value is wiped out, and the CONST_INT rtx is
6881 assigned VOIDmode. */
6882 add_AT_unsigned (die
, DW_AT_const_value
, (unsigned) INTVAL (rtl
));
6886 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6887 floating-point constant. A CONST_DOUBLE is used whenever the
6888 constant requires more than one word in order to be adequately
6889 represented. We output CONST_DOUBLEs as blocks. */
6891 register enum machine_mode mode
= GET_MODE (rtl
);
6893 if (GET_MODE_CLASS (mode
) == MODE_FLOAT
)
6895 register unsigned length
= GET_MODE_SIZE (mode
) / sizeof (long);
6899 REAL_VALUE_FROM_CONST_DOUBLE (rv
, rtl
);
6903 REAL_VALUE_TO_TARGET_SINGLE (rv
, array
[0]);
6907 REAL_VALUE_TO_TARGET_DOUBLE (rv
, array
);
6912 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv
, array
);
6919 add_AT_float (die
, DW_AT_const_value
, length
, array
);
6922 add_AT_long_long (die
, DW_AT_const_value
,
6923 CONST_DOUBLE_HIGH (rtl
), CONST_DOUBLE_LOW (rtl
));
6928 add_AT_string (die
, DW_AT_const_value
, XSTR (rtl
, 0));
6934 add_AT_addr (die
, DW_AT_const_value
, addr_to_string (rtl
));
6938 /* In cases where an inlined instance of an inline function is passed
6939 the address of an `auto' variable (which is local to the caller) we
6940 can get a situation where the DECL_RTL of the artificial local
6941 variable (for the inlining) which acts as a stand-in for the
6942 corresponding formal parameter (of the inline function) will look
6943 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6944 exactly a compile-time constant expression, but it isn't the address
6945 of the (artificial) local variable either. Rather, it represents the
6946 *value* which the artificial local variable always has during its
6947 lifetime. We currently have no way to represent such quasi-constant
6948 values in Dwarf, so for now we just punt and generate nothing. */
6952 /* No other kinds of rtx should be possible here. */
6958 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6959 data attribute for a variable or a parameter. We generate the
6960 DW_AT_const_value attribute only in those cases where the given variable
6961 or parameter does not have a true "location" either in memory or in a
6962 register. This can happen (for example) when a constant is passed as an
6963 actual argument in a call to an inline function. (It's possible that
6964 these things can crop up in other ways also.) Note that one type of
6965 constant value which can be passed into an inlined function is a constant
6966 pointer. This can happen for example if an actual argument in an inlined
6967 function call evaluates to a compile-time constant address. */
6970 add_location_or_const_value_attribute (die
, decl
)
6971 register dw_die_ref die
;
6975 register tree declared_type
;
6976 register tree passed_type
;
6978 if (TREE_CODE (decl
) == ERROR_MARK
)
6981 if (TREE_CODE (decl
) != VAR_DECL
&& TREE_CODE (decl
) != PARM_DECL
)
6984 /* Here we have to decide where we are going to say the parameter "lives"
6985 (as far as the debugger is concerned). We only have a couple of
6986 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6988 DECL_RTL normally indicates where the parameter lives during most of the
6989 activation of the function. If optimization is enabled however, this
6990 could be either NULL or else a pseudo-reg. Both of those cases indicate
6991 that the parameter doesn't really live anywhere (as far as the code
6992 generation parts of GCC are concerned) during most of the function's
6993 activation. That will happen (for example) if the parameter is never
6994 referenced within the function.
6996 We could just generate a location descriptor here for all non-NULL
6997 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6998 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6999 where DECL_RTL is NULL or is a pseudo-reg.
7001 Note however that we can only get away with using DECL_INCOMING_RTL as
7002 a backup substitute for DECL_RTL in certain limited cases. In cases
7003 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7004 we can be sure that the parameter was passed using the same type as it is
7005 declared to have within the function, and that its DECL_INCOMING_RTL
7006 points us to a place where a value of that type is passed.
7008 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7009 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7010 because in these cases DECL_INCOMING_RTL points us to a value of some
7011 type which is *different* from the type of the parameter itself. Thus,
7012 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7013 such cases, the debugger would end up (for example) trying to fetch a
7014 `float' from a place which actually contains the first part of a
7015 `double'. That would lead to really incorrect and confusing
7016 output at debug-time.
7018 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7019 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7020 are a couple of exceptions however. On little-endian machines we can
7021 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7022 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7023 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7024 when (on a little-endian machine) a non-prototyped function has a
7025 parameter declared to be of type `short' or `char'. In such cases,
7026 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7027 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7028 passed `int' value. If the debugger then uses that address to fetch
7029 a `short' or a `char' (on a little-endian machine) the result will be
7030 the correct data, so we allow for such exceptional cases below.
7032 Note that our goal here is to describe the place where the given formal
7033 parameter lives during most of the function's activation (i.e. between
7034 the end of the prologue and the start of the epilogue). We'll do that
7035 as best as we can. Note however that if the given formal parameter is
7036 modified sometime during the execution of the function, then a stack
7037 backtrace (at debug-time) will show the function as having been
7038 called with the *new* value rather than the value which was
7039 originally passed in. This happens rarely enough that it is not
7040 a major problem, but it *is* a problem, and I'd like to fix it.
7042 A future version of dwarf2out.c may generate two additional
7043 attributes for any given DW_TAG_formal_parameter DIE which will
7044 describe the "passed type" and the "passed location" for the
7045 given formal parameter in addition to the attributes we now
7046 generate to indicate the "declared type" and the "active
7047 location" for each parameter. This additional set of attributes
7048 could be used by debuggers for stack backtraces. Separately, note
7049 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7050 NULL also. This happens (for example) for inlined-instances of
7051 inline function formal parameters which are never referenced.
7052 This really shouldn't be happening. All PARM_DECL nodes should
7053 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7054 doesn't currently generate these values for inlined instances of
7055 inline function parameters, so when we see such cases, we are
7056 just out-of-luck for the time being (until integrate.c
7059 /* Use DECL_RTL as the "location" unless we find something better. */
7060 rtl
= DECL_RTL (decl
);
7062 if (TREE_CODE (decl
) == PARM_DECL
)
7064 if (rtl
== NULL_RTX
|| is_pseudo_reg (rtl
))
7066 declared_type
= type_main_variant (TREE_TYPE (decl
));
7067 passed_type
= type_main_variant (DECL_ARG_TYPE (decl
));
7069 /* This decl represents a formal parameter which was optimized out.
7070 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7071 all* cases where (rtl == NULL_RTX) just below. */
7072 if (declared_type
== passed_type
)
7073 rtl
= DECL_INCOMING_RTL (decl
);
7074 else if (! BYTES_BIG_ENDIAN
7075 && TREE_CODE (declared_type
) == INTEGER_TYPE
7076 && TYPE_SIZE (declared_type
) <= TYPE_SIZE (passed_type
))
7077 rtl
= DECL_INCOMING_RTL (decl
);
7081 if (rtl
== NULL_RTX
)
7084 rtl
= eliminate_regs (rtl
, 0, NULL_RTX
);
7085 #ifdef LEAF_REG_REMAP
7087 leaf_renumber_regs_insn (rtl
);
7090 switch (GET_CODE (rtl
))
7093 /* The address of a variable that was optimized away; don't emit
7104 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7105 add_const_value_attribute (die
, rtl
);
7112 add_AT_location_description (die
, DW_AT_location
, rtl
);
7120 /* Generate an DW_AT_name attribute given some string value to be included as
7121 the value of the attribute. */
7124 add_name_attribute (die
, name_string
)
7125 register dw_die_ref die
;
7126 register char *name_string
;
7128 if (name_string
!= NULL
&& *name_string
!= 0)
7129 add_AT_string (die
, DW_AT_name
, name_string
);
7132 /* Given a tree node describing an array bound (either lower or upper) output
7133 a representation for that bound. */
7136 add_bound_info (subrange_die
, bound_attr
, bound
)
7137 register dw_die_ref subrange_die
;
7138 register enum dwarf_attribute bound_attr
;
7139 register tree bound
;
7141 register unsigned bound_value
= 0;
7143 /* If this is an Ada unconstrained array type, then don't emit any debug
7144 info because the array bounds are unknown. They are parameterized when
7145 the type is instantiated. */
7146 if (contains_placeholder_p (bound
))
7149 switch (TREE_CODE (bound
))
7154 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7156 bound_value
= TREE_INT_CST_LOW (bound
);
7157 if (bound_attr
== DW_AT_lower_bound
7158 && ((is_c_family () && bound_value
== 0)
7159 || (is_fortran () && bound_value
== 1)))
7160 /* use the default */;
7162 add_AT_unsigned (subrange_die
, bound_attr
, bound_value
);
7167 case NON_LVALUE_EXPR
:
7168 add_bound_info (subrange_die
, bound_attr
, TREE_OPERAND (bound
, 0));
7172 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7173 access the upper bound values may be bogus. If they refer to a
7174 register, they may only describe how to get at these values at the
7175 points in the generated code right after they have just been
7176 computed. Worse yet, in the typical case, the upper bound values
7177 will not even *be* computed in the optimized code (though the
7178 number of elements will), so these SAVE_EXPRs are entirely
7179 bogus. In order to compensate for this fact, we check here to see
7180 if optimization is enabled, and if so, we don't add an attribute
7181 for the (unknown and unknowable) upper bound. This should not
7182 cause too much trouble for existing (stupid?) debuggers because
7183 they have to deal with empty upper bounds location descriptions
7184 anyway in order to be able to deal with incomplete array types.
7185 Of course an intelligent debugger (GDB?) should be able to
7186 comprehend that a missing upper bound specification in a array
7187 type used for a storage class `auto' local array variable
7188 indicates that the upper bound is both unknown (at compile- time)
7189 and unknowable (at run-time) due to optimization.
7191 We assume that a MEM rtx is safe because gcc wouldn't put the
7192 value there unless it was going to be used repeatedly in the
7193 function, i.e. for cleanups. */
7194 if (! optimize
|| GET_CODE (SAVE_EXPR_RTL (bound
)) == MEM
)
7196 register dw_die_ref ctx
= lookup_decl_die (current_function_decl
);
7197 register dw_die_ref decl_die
= new_die (DW_TAG_variable
, ctx
);
7198 register rtx loc
= SAVE_EXPR_RTL (bound
);
7200 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7201 it references an outer function's frame. */
7203 if (GET_CODE (loc
) == MEM
)
7205 rtx new_addr
= fix_lexical_addr (XEXP (loc
, 0), bound
);
7207 if (XEXP (loc
, 0) != new_addr
)
7208 loc
= gen_rtx (MEM
, GET_MODE (loc
), new_addr
);
7211 add_AT_flag (decl_die
, DW_AT_artificial
, 1);
7212 add_type_attribute (decl_die
, TREE_TYPE (bound
), 1, 0, ctx
);
7213 add_AT_location_description (decl_die
, DW_AT_location
, loc
);
7214 add_AT_die_ref (subrange_die
, bound_attr
, decl_die
);
7217 /* Else leave out the attribute. */
7223 /* ??? These types of bounds can be created by the Ada front end,
7224 and it isn't clear how to emit debug info for them. */
7232 /* Note that the block of subscript information for an array type also
7233 includes information about the element type of type given array type. */
7236 add_subscript_info (type_die
, type
)
7237 register dw_die_ref type_die
;
7240 #ifndef MIPS_DEBUGGING_INFO
7241 register unsigned dimension_number
;
7243 register tree lower
, upper
;
7244 register dw_die_ref subrange_die
;
7246 /* The GNU compilers represent multidimensional array types as sequences of
7247 one dimensional array types whose element types are themselves array
7248 types. Here we squish that down, so that each multidimensional array
7249 type gets only one array_type DIE in the Dwarf debugging info. The draft
7250 Dwarf specification say that we are allowed to do this kind of
7251 compression in C (because there is no difference between an array or
7252 arrays and a multidimensional array in C) but for other source languages
7253 (e.g. Ada) we probably shouldn't do this. */
7255 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7256 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7257 We work around this by disabling this feature. See also
7258 gen_array_type_die. */
7259 #ifndef MIPS_DEBUGGING_INFO
7260 for (dimension_number
= 0;
7261 TREE_CODE (type
) == ARRAY_TYPE
;
7262 type
= TREE_TYPE (type
), dimension_number
++)
7265 register tree domain
= TYPE_DOMAIN (type
);
7267 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7268 and (in GNU C only) variable bounds. Handle all three forms
7270 subrange_die
= new_die (DW_TAG_subrange_type
, type_die
);
7273 /* We have an array type with specified bounds. */
7274 lower
= TYPE_MIN_VALUE (domain
);
7275 upper
= TYPE_MAX_VALUE (domain
);
7277 /* define the index type. */
7278 if (TREE_TYPE (domain
))
7280 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7281 TREE_TYPE field. We can't emit debug info for this
7282 because it is an unnamed integral type. */
7283 if (TREE_CODE (domain
) == INTEGER_TYPE
7284 && TYPE_NAME (domain
) == NULL_TREE
7285 && TREE_CODE (TREE_TYPE (domain
)) == INTEGER_TYPE
7286 && TYPE_NAME (TREE_TYPE (domain
)) == NULL_TREE
)
7289 add_type_attribute (subrange_die
, TREE_TYPE (domain
), 0, 0,
7293 /* ??? If upper is NULL, the array has unspecified length,
7294 but it does have a lower bound. This happens with Fortran
7296 Since the debugger is definitely going to need to know N
7297 to produce useful results, go ahead and output the lower
7298 bound solo, and hope the debugger can cope. */
7300 add_bound_info (subrange_die
, DW_AT_lower_bound
, lower
);
7302 add_bound_info (subrange_die
, DW_AT_upper_bound
, upper
);
7305 /* We have an array type with an unspecified length. The DWARF-2
7306 spec does not say how to handle this; let's just leave out the
7311 #ifndef MIPS_DEBUGGING_INFO
7317 add_byte_size_attribute (die
, tree_node
)
7319 register tree tree_node
;
7321 register unsigned size
;
7323 switch (TREE_CODE (tree_node
))
7331 case QUAL_UNION_TYPE
:
7332 size
= int_size_in_bytes (tree_node
);
7335 /* For a data member of a struct or union, the DW_AT_byte_size is
7336 generally given as the number of bytes normally allocated for an
7337 object of the *declared* type of the member itself. This is true
7338 even for bit-fields. */
7339 size
= simple_type_size_in_bits (field_type (tree_node
)) / BITS_PER_UNIT
;
7345 /* Note that `size' might be -1 when we get to this point. If it is, that
7346 indicates that the byte size of the entity in question is variable. We
7347 have no good way of expressing this fact in Dwarf at the present time,
7348 so just let the -1 pass on through. */
7350 add_AT_unsigned (die
, DW_AT_byte_size
, size
);
7353 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7354 which specifies the distance in bits from the highest order bit of the
7355 "containing object" for the bit-field to the highest order bit of the
7358 For any given bit-field, the "containing object" is a hypothetical
7359 object (of some integral or enum type) within which the given bit-field
7360 lives. The type of this hypothetical "containing object" is always the
7361 same as the declared type of the individual bit-field itself. The
7362 determination of the exact location of the "containing object" for a
7363 bit-field is rather complicated. It's handled by the
7364 `field_byte_offset' function (above).
7366 Note that it is the size (in bytes) of the hypothetical "containing object"
7367 which will be given in the DW_AT_byte_size attribute for this bit-field.
7368 (See `byte_size_attribute' above). */
7371 add_bit_offset_attribute (die
, decl
)
7372 register dw_die_ref die
;
7375 register unsigned object_offset_in_bytes
= field_byte_offset (decl
);
7376 register tree type
= DECL_BIT_FIELD_TYPE (decl
);
7377 register tree bitpos_tree
= DECL_FIELD_BITPOS (decl
);
7378 register unsigned bitpos_int
;
7379 register unsigned highest_order_object_bit_offset
;
7380 register unsigned highest_order_field_bit_offset
;
7381 register unsigned bit_offset
;
7383 /* Must be a field and a bit field. */
7385 || TREE_CODE (decl
) != FIELD_DECL
)
7388 /* We can't yet handle bit-fields whose offsets are variable, so if we
7389 encounter such things, just return without generating any attribute
7391 if (TREE_CODE (bitpos_tree
) != INTEGER_CST
)
7394 bitpos_int
= (unsigned) TREE_INT_CST_LOW (bitpos_tree
);
7396 /* Note that the bit offset is always the distance (in bits) from the
7397 highest-order bit of the "containing object" to the highest-order bit of
7398 the bit-field itself. Since the "high-order end" of any object or field
7399 is different on big-endian and little-endian machines, the computation
7400 below must take account of these differences. */
7401 highest_order_object_bit_offset
= object_offset_in_bytes
* BITS_PER_UNIT
;
7402 highest_order_field_bit_offset
= bitpos_int
;
7404 if (! BYTES_BIG_ENDIAN
)
7406 highest_order_field_bit_offset
7407 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl
));
7409 highest_order_object_bit_offset
+= simple_type_size_in_bits (type
);
7413 = (! BYTES_BIG_ENDIAN
7414 ? highest_order_object_bit_offset
- highest_order_field_bit_offset
7415 : highest_order_field_bit_offset
- highest_order_object_bit_offset
);
7417 add_AT_unsigned (die
, DW_AT_bit_offset
, bit_offset
);
7420 /* For a FIELD_DECL node which represents a bit field, output an attribute
7421 which specifies the length in bits of the given field. */
7424 add_bit_size_attribute (die
, decl
)
7425 register dw_die_ref die
;
7428 /* Must be a field and a bit field. */
7429 if (TREE_CODE (decl
) != FIELD_DECL
7430 || ! DECL_BIT_FIELD_TYPE (decl
))
7432 add_AT_unsigned (die
, DW_AT_bit_size
,
7433 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl
)));
7436 /* If the compiled language is ANSI C, then add a 'prototyped'
7437 attribute, if arg types are given for the parameters of a function. */
7440 add_prototyped_attribute (die
, func_type
)
7441 register dw_die_ref die
;
7442 register tree func_type
;
7444 if (get_AT_unsigned (comp_unit_die
, DW_AT_language
) == DW_LANG_C89
7445 && TYPE_ARG_TYPES (func_type
) != NULL
)
7446 add_AT_flag (die
, DW_AT_prototyped
, 1);
7450 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7451 by looking in either the type declaration or object declaration
7455 add_abstract_origin_attribute (die
, origin
)
7456 register dw_die_ref die
;
7457 register tree origin
;
7459 dw_die_ref origin_die
= NULL
;
7460 if (TREE_CODE_CLASS (TREE_CODE (origin
)) == 'd')
7461 origin_die
= lookup_decl_die (origin
);
7462 else if (TREE_CODE_CLASS (TREE_CODE (origin
)) == 't')
7463 origin_die
= lookup_type_die (origin
);
7465 add_AT_die_ref (die
, DW_AT_abstract_origin
, origin_die
);
7468 /* We do not currently support the pure_virtual attribute. */
7471 add_pure_or_virtual_attribute (die
, func_decl
)
7472 register dw_die_ref die
;
7473 register tree func_decl
;
7475 if (DECL_VINDEX (func_decl
))
7477 add_AT_unsigned (die
, DW_AT_virtuality
, DW_VIRTUALITY_virtual
);
7478 add_AT_loc (die
, DW_AT_vtable_elem_location
,
7479 new_loc_descr (DW_OP_constu
,
7480 TREE_INT_CST_LOW (DECL_VINDEX (func_decl
)),
7483 /* GNU extension: Record what type this method came from originally. */
7484 if (debug_info_level
> DINFO_LEVEL_TERSE
)
7485 add_AT_die_ref (die
, DW_AT_containing_type
,
7486 lookup_type_die (DECL_CONTEXT (func_decl
)));
7490 /* Add source coordinate attributes for the given decl. */
7493 add_src_coords_attributes (die
, decl
)
7494 register dw_die_ref die
;
7497 register unsigned file_index
= lookup_filename (DECL_SOURCE_FILE (decl
));
7499 add_AT_unsigned (die
, DW_AT_decl_file
, file_index
);
7500 add_AT_unsigned (die
, DW_AT_decl_line
, DECL_SOURCE_LINE (decl
));
7503 /* Add an DW_AT_name attribute and source coordinate attribute for the
7504 given decl, but only if it actually has a name. */
7507 add_name_and_src_coords_attributes (die
, decl
)
7508 register dw_die_ref die
;
7511 register tree decl_name
;
7513 decl_name
= DECL_NAME (decl
);
7514 if (decl_name
!= NULL
&& IDENTIFIER_POINTER (decl_name
) != NULL
)
7516 add_name_attribute (die
, dwarf2_name (decl
, 0));
7517 add_src_coords_attributes (die
, decl
);
7518 if ((TREE_CODE (decl
) == FUNCTION_DECL
|| TREE_CODE (decl
) == VAR_DECL
)
7519 && DECL_ASSEMBLER_NAME (decl
) != DECL_NAME (decl
))
7520 add_AT_string (die
, DW_AT_MIPS_linkage_name
,
7521 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)));
7525 /* Push a new declaration scope. */
7528 push_decl_scope (scope
)
7531 tree containing_scope
;
7534 /* Make room in the decl_scope_table, if necessary. */
7535 if (decl_scope_table_allocated
== decl_scope_depth
)
7537 decl_scope_table_allocated
+= DECL_SCOPE_TABLE_INCREMENT
;
7539 = (decl_scope_node
*) xrealloc (decl_scope_table
,
7540 (decl_scope_table_allocated
7541 * sizeof (decl_scope_node
)));
7544 decl_scope_table
[decl_scope_depth
].scope
= scope
;
7546 /* Sometimes, while recursively emitting subtypes within a class type,
7547 we end up recuring on a subtype at a higher level then the current
7548 subtype. In such a case, we need to search the decl_scope_table to
7549 find the parent of this subtype. */
7551 if (TREE_CODE_CLASS (TREE_CODE (scope
)) == 't')
7552 containing_scope
= TYPE_CONTEXT (scope
);
7554 containing_scope
= NULL_TREE
;
7556 /* The normal case. */
7557 if (decl_scope_depth
== 0
7558 || containing_scope
== NULL_TREE
7559 /* Ignore namespaces for the moment. */
7560 || TREE_CODE (containing_scope
) == NAMESPACE_DECL
7561 || containing_scope
== decl_scope_table
[decl_scope_depth
- 1].scope
)
7562 decl_scope_table
[decl_scope_depth
].previous
= decl_scope_depth
- 1;
7565 /* We need to search for the containing_scope. */
7566 for (i
= 0; i
< decl_scope_depth
; i
++)
7567 if (decl_scope_table
[i
].scope
== containing_scope
)
7570 if (i
== decl_scope_depth
)
7573 decl_scope_table
[decl_scope_depth
].previous
= i
;
7579 /* Return the DIE for the scope that immediately contains this declaration. */
7582 scope_die_for (t
, context_die
)
7584 register dw_die_ref context_die
;
7586 register dw_die_ref scope_die
= NULL
;
7587 register tree containing_scope
;
7590 /* Walk back up the declaration tree looking for a place to define
7592 if (TREE_CODE_CLASS (TREE_CODE (t
)) == 't')
7593 containing_scope
= TYPE_CONTEXT (t
);
7594 else if (TREE_CODE (t
) == FUNCTION_DECL
&& DECL_VINDEX (t
))
7595 containing_scope
= decl_class_context (t
);
7597 containing_scope
= DECL_CONTEXT (t
);
7599 /* Ignore namespaces for the moment. */
7600 if (containing_scope
&& TREE_CODE (containing_scope
) == NAMESPACE_DECL
)
7601 containing_scope
= NULL_TREE
;
7603 /* Function-local tags and functions get stuck in limbo until they are
7604 fixed up by decls_for_scope. */
7605 if (context_die
== NULL
&& containing_scope
!= NULL_TREE
7606 && (TREE_CODE (t
) == FUNCTION_DECL
|| is_tagged_type (t
)))
7609 if (containing_scope
== NULL_TREE
)
7610 scope_die
= comp_unit_die
;
7613 for (i
= decl_scope_depth
- 1, scope_die
= context_die
;
7614 i
>= 0 && decl_scope_table
[i
].scope
!= containing_scope
;
7615 (scope_die
= scope_die
->die_parent
,
7616 i
= decl_scope_table
[i
].previous
))
7619 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7620 does it try to handle types defined by TYPE_DECLs. Such types
7621 thus have an incorrect TYPE_CONTEXT, which points to the block
7622 they were originally defined in, instead of the current block
7623 created by function inlining. We try to detect that here and
7626 if (i
< 0 && scope_die
== comp_unit_die
7627 && TREE_CODE (containing_scope
) == BLOCK
7628 && is_tagged_type (t
)
7629 && (block_ultimate_origin (decl_scope_table
[decl_scope_depth
- 1].scope
)
7630 == containing_scope
))
7632 scope_die
= context_die
;
7633 /* Since the checks below are no longer applicable. */
7639 if (scope_die
!= comp_unit_die
7640 || TREE_CODE_CLASS (TREE_CODE (containing_scope
)) != 't')
7642 if (debug_info_level
> DINFO_LEVEL_TERSE
7643 && !TREE_ASM_WRITTEN (containing_scope
))
7651 /* Pop a declaration scope. */
7655 if (decl_scope_depth
<= 0)
7660 /* Many forms of DIEs require a "type description" attribute. This
7661 routine locates the proper "type descriptor" die for the type given
7662 by 'type', and adds an DW_AT_type attribute below the given die. */
7665 add_type_attribute (object_die
, type
, decl_const
, decl_volatile
, context_die
)
7666 register dw_die_ref object_die
;
7668 register int decl_const
;
7669 register int decl_volatile
;
7670 register dw_die_ref context_die
;
7672 register enum tree_code code
= TREE_CODE (type
);
7673 register dw_die_ref type_die
= NULL
;
7675 /* ??? If this type is an unnamed subrange type of an integral or
7676 floating-point type, use the inner type. This is because we have no
7677 support for unnamed types in base_type_die. This can happen if this is
7678 an Ada subrange type. Correct solution is emit a subrange type die. */
7679 if ((code
== INTEGER_TYPE
|| code
== REAL_TYPE
)
7680 && TREE_TYPE (type
) != 0 && TYPE_NAME (type
) == 0)
7681 type
= TREE_TYPE (type
), code
= TREE_CODE (type
);
7683 if (code
== ERROR_MARK
)
7686 /* Handle a special case. For functions whose return type is void, we
7687 generate *no* type attribute. (Note that no object may have type
7688 `void', so this only applies to function return types). */
7689 if (code
== VOID_TYPE
)
7692 type_die
= modified_type_die (type
,
7693 decl_const
|| TYPE_READONLY (type
),
7694 decl_volatile
|| TYPE_VOLATILE (type
),
7696 if (type_die
!= NULL
)
7697 add_AT_die_ref (object_die
, DW_AT_type
, type_die
);
7700 /* Given a tree pointer to a struct, class, union, or enum type node, return
7701 a pointer to the (string) tag name for the given type, or zero if the type
7702 was declared without a tag. */
7708 register char *name
= 0;
7710 if (TYPE_NAME (type
) != 0)
7712 register tree t
= 0;
7714 /* Find the IDENTIFIER_NODE for the type name. */
7715 if (TREE_CODE (TYPE_NAME (type
)) == IDENTIFIER_NODE
)
7716 t
= TYPE_NAME (type
);
7718 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7719 a TYPE_DECL node, regardless of whether or not a `typedef' was
7721 else if (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7722 && ! DECL_IGNORED_P (TYPE_NAME (type
)))
7723 t
= DECL_NAME (TYPE_NAME (type
));
7725 /* Now get the name as a string, or invent one. */
7727 name
= IDENTIFIER_POINTER (t
);
7730 return (name
== 0 || *name
== '\0') ? 0 : name
;
7733 /* Return the type associated with a data member, make a special check
7734 for bit field types. */
7737 member_declared_type (member
)
7738 register tree member
;
7740 return (DECL_BIT_FIELD_TYPE (member
)
7741 ? DECL_BIT_FIELD_TYPE (member
)
7742 : TREE_TYPE (member
));
7745 /* Get the decl's label, as described by its RTL. This may be different
7746 from the DECL_NAME name used in the source file. */
7750 decl_start_label (decl
)
7755 x
= DECL_RTL (decl
);
7756 if (GET_CODE (x
) != MEM
)
7760 if (GET_CODE (x
) != SYMBOL_REF
)
7763 fnname
= XSTR (x
, 0);
7768 /* These routines generate the internal representation of the DIE's for
7769 the compilation unit. Debugging information is collected by walking
7770 the declaration trees passed in from dwarf2out_decl(). */
7773 gen_array_type_die (type
, context_die
)
7775 register dw_die_ref context_die
;
7777 register dw_die_ref scope_die
= scope_die_for (type
, context_die
);
7778 register dw_die_ref array_die
;
7779 register tree element_type
;
7781 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7782 the inner array type comes before the outer array type. Thus we must
7783 call gen_type_die before we call new_die. See below also. */
7784 #ifdef MIPS_DEBUGGING_INFO
7785 gen_type_die (TREE_TYPE (type
), context_die
);
7788 array_die
= new_die (DW_TAG_array_type
, scope_die
);
7791 /* We default the array ordering. SDB will probably do
7792 the right things even if DW_AT_ordering is not present. It's not even
7793 an issue until we start to get into multidimensional arrays anyway. If
7794 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7795 then we'll have to put the DW_AT_ordering attribute back in. (But if
7796 and when we find out that we need to put these in, we will only do so
7797 for multidimensional arrays. */
7798 add_AT_unsigned (array_die
, DW_AT_ordering
, DW_ORD_row_major
);
7801 #ifdef MIPS_DEBUGGING_INFO
7802 /* The SGI compilers handle arrays of unknown bound by setting
7803 AT_declaration and not emitting any subrange DIEs. */
7804 if (! TYPE_DOMAIN (type
))
7805 add_AT_unsigned (array_die
, DW_AT_declaration
, 1);
7808 add_subscript_info (array_die
, type
);
7810 equate_type_number_to_die (type
, array_die
);
7812 /* Add representation of the type of the elements of this array type. */
7813 element_type
= TREE_TYPE (type
);
7815 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7816 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7817 We work around this by disabling this feature. See also
7818 add_subscript_info. */
7819 #ifndef MIPS_DEBUGGING_INFO
7820 while (TREE_CODE (element_type
) == ARRAY_TYPE
)
7821 element_type
= TREE_TYPE (element_type
);
7823 gen_type_die (element_type
, context_die
);
7826 add_type_attribute (array_die
, element_type
, 0, 0, context_die
);
7830 gen_set_type_die (type
, context_die
)
7832 register dw_die_ref context_die
;
7834 register dw_die_ref type_die
7835 = new_die (DW_TAG_set_type
, scope_die_for (type
, context_die
));
7837 equate_type_number_to_die (type
, type_die
);
7838 add_type_attribute (type_die
, TREE_TYPE (type
), 0, 0, context_die
);
7843 gen_entry_point_die (decl
, context_die
)
7845 register dw_die_ref context_die
;
7847 register tree origin
= decl_ultimate_origin (decl
);
7848 register dw_die_ref decl_die
= new_die (DW_TAG_entry_point
, context_die
);
7850 add_abstract_origin_attribute (decl_die
, origin
);
7853 add_name_and_src_coords_attributes (decl_die
, decl
);
7854 add_type_attribute (decl_die
, TREE_TYPE (TREE_TYPE (decl
)),
7858 if (DECL_ABSTRACT (decl
))
7859 equate_decl_number_to_die (decl
, decl_die
);
7861 add_AT_lbl_id (decl_die
, DW_AT_low_pc
, decl_start_label (decl
));
7865 /* Remember a type in the pending_types_list. */
7871 if (pending_types
== pending_types_allocated
)
7873 pending_types_allocated
+= PENDING_TYPES_INCREMENT
;
7875 = (tree
*) xrealloc (pending_types_list
,
7876 sizeof (tree
) * pending_types_allocated
);
7879 pending_types_list
[pending_types
++] = type
;
7882 /* Output any pending types (from the pending_types list) which we can output
7883 now (taking into account the scope that we are working on now).
7885 For each type output, remove the given type from the pending_types_list
7886 *before* we try to output it. */
7889 output_pending_types_for_scope (context_die
)
7890 register dw_die_ref context_die
;
7894 while (pending_types
)
7897 type
= pending_types_list
[pending_types
];
7898 gen_type_die (type
, context_die
);
7899 if (!TREE_ASM_WRITTEN (type
))
7904 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7907 gen_inlined_enumeration_type_die (type
, context_die
)
7909 register dw_die_ref context_die
;
7911 register dw_die_ref type_die
= new_die (DW_TAG_enumeration_type
,
7912 scope_die_for (type
, context_die
));
7914 if (!TREE_ASM_WRITTEN (type
))
7916 add_abstract_origin_attribute (type_die
, type
);
7919 /* Generate a DIE to represent an inlined instance of a structure type. */
7922 gen_inlined_structure_type_die (type
, context_die
)
7924 register dw_die_ref context_die
;
7926 register dw_die_ref type_die
= new_die (DW_TAG_structure_type
,
7927 scope_die_for (type
, context_die
));
7929 if (!TREE_ASM_WRITTEN (type
))
7931 add_abstract_origin_attribute (type_die
, type
);
7934 /* Generate a DIE to represent an inlined instance of a union type. */
7937 gen_inlined_union_type_die (type
, context_die
)
7939 register dw_die_ref context_die
;
7941 register dw_die_ref type_die
= new_die (DW_TAG_union_type
,
7942 scope_die_for (type
, context_die
));
7944 if (!TREE_ASM_WRITTEN (type
))
7946 add_abstract_origin_attribute (type_die
, type
);
7949 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7950 include all of the information about the enumeration values also. Each
7951 enumerated type name/value is listed as a child of the enumerated type
7955 gen_enumeration_type_die (type
, context_die
)
7957 register dw_die_ref context_die
;
7959 register dw_die_ref type_die
= lookup_type_die (type
);
7961 if (type_die
== NULL
)
7963 type_die
= new_die (DW_TAG_enumeration_type
,
7964 scope_die_for (type
, context_die
));
7965 equate_type_number_to_die (type
, type_die
);
7966 add_name_attribute (type_die
, type_tag (type
));
7968 else if (! TYPE_SIZE (type
))
7971 remove_AT (type_die
, DW_AT_declaration
);
7973 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7974 given enum type is incomplete, do not generate the DW_AT_byte_size
7975 attribute or the DW_AT_element_list attribute. */
7976 if (TYPE_SIZE (type
))
7980 TREE_ASM_WRITTEN (type
) = 1;
7981 add_byte_size_attribute (type_die
, type
);
7982 if (TYPE_STUB_DECL (type
) != NULL_TREE
)
7983 add_src_coords_attributes (type_die
, TYPE_STUB_DECL (type
));
7985 /* If the first reference to this type was as the return type of an
7986 inline function, then it may not have a parent. Fix this now. */
7987 if (type_die
->die_parent
== NULL
)
7988 add_child_die (scope_die_for (type
, context_die
), type_die
);
7990 for (link
= TYPE_FIELDS (type
);
7991 link
!= NULL
; link
= TREE_CHAIN (link
))
7993 register dw_die_ref enum_die
= new_die (DW_TAG_enumerator
, type_die
);
7995 add_name_attribute (enum_die
,
7996 IDENTIFIER_POINTER (TREE_PURPOSE (link
)));
7997 add_AT_unsigned (enum_die
, DW_AT_const_value
,
7998 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link
)));
8002 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8006 /* Generate a DIE to represent either a real live formal parameter decl or to
8007 represent just the type of some formal parameter position in some function
8010 Note that this routine is a bit unusual because its argument may be a
8011 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8012 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8013 node. If it's the former then this function is being called to output a
8014 DIE to represent a formal parameter object (or some inlining thereof). If
8015 it's the latter, then this function is only being called to output a
8016 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8017 argument type of some subprogram type. */
8020 gen_formal_parameter_die (node
, context_die
)
8022 register dw_die_ref context_die
;
8024 register dw_die_ref parm_die
8025 = new_die (DW_TAG_formal_parameter
, context_die
);
8026 register tree origin
;
8028 switch (TREE_CODE_CLASS (TREE_CODE (node
)))
8031 origin
= decl_ultimate_origin (node
);
8033 add_abstract_origin_attribute (parm_die
, origin
);
8036 add_name_and_src_coords_attributes (parm_die
, node
);
8037 add_type_attribute (parm_die
, TREE_TYPE (node
),
8038 TREE_READONLY (node
),
8039 TREE_THIS_VOLATILE (node
),
8041 if (DECL_ARTIFICIAL (node
))
8042 add_AT_flag (parm_die
, DW_AT_artificial
, 1);
8045 equate_decl_number_to_die (node
, parm_die
);
8046 if (! DECL_ABSTRACT (node
))
8047 add_location_or_const_value_attribute (parm_die
, node
);
8052 /* We were called with some kind of a ..._TYPE node. */
8053 add_type_attribute (parm_die
, node
, 0, 0, context_die
);
8063 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8064 at the end of an (ANSI prototyped) formal parameters list. */
8067 gen_unspecified_parameters_die (decl_or_type
, context_die
)
8068 register tree decl_or_type
;
8069 register dw_die_ref context_die
;
8071 new_die (DW_TAG_unspecified_parameters
, context_die
);
8074 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8075 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8076 parameters as specified in some function type specification (except for
8077 those which appear as part of a function *definition*).
8079 Note we must be careful here to output all of the parameter DIEs before*
8080 we output any DIEs needed to represent the types of the formal parameters.
8081 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8082 non-parameter DIE it sees ends the formal parameter list. */
8085 gen_formal_types_die (function_or_method_type
, context_die
)
8086 register tree function_or_method_type
;
8087 register dw_die_ref context_die
;
8090 register tree formal_type
= NULL
;
8091 register tree first_parm_type
= TYPE_ARG_TYPES (function_or_method_type
);
8094 /* In the case where we are generating a formal types list for a C++
8095 non-static member function type, skip over the first thing on the
8096 TYPE_ARG_TYPES list because it only represents the type of the hidden
8097 `this pointer'. The debugger should be able to figure out (without
8098 being explicitly told) that this non-static member function type takes a
8099 `this pointer' and should be able to figure what the type of that hidden
8100 parameter is from the DW_AT_member attribute of the parent
8101 DW_TAG_subroutine_type DIE. */
8102 if (TREE_CODE (function_or_method_type
) == METHOD_TYPE
)
8103 first_parm_type
= TREE_CHAIN (first_parm_type
);
8106 /* Make our first pass over the list of formal parameter types and output a
8107 DW_TAG_formal_parameter DIE for each one. */
8108 for (link
= first_parm_type
; link
; link
= TREE_CHAIN (link
))
8110 register dw_die_ref parm_die
;
8112 formal_type
= TREE_VALUE (link
);
8113 if (formal_type
== void_type_node
)
8116 /* Output a (nameless) DIE to represent the formal parameter itself. */
8117 parm_die
= gen_formal_parameter_die (formal_type
, context_die
);
8118 if (TREE_CODE (function_or_method_type
) == METHOD_TYPE
8119 && link
== first_parm_type
)
8120 add_AT_flag (parm_die
, DW_AT_artificial
, 1);
8123 /* If this function type has an ellipsis, add a
8124 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8125 if (formal_type
!= void_type_node
)
8126 gen_unspecified_parameters_die (function_or_method_type
, context_die
);
8128 /* Make our second (and final) pass over the list of formal parameter types
8129 and output DIEs to represent those types (as necessary). */
8130 for (link
= TYPE_ARG_TYPES (function_or_method_type
);
8132 link
= TREE_CHAIN (link
))
8134 formal_type
= TREE_VALUE (link
);
8135 if (formal_type
== void_type_node
)
8138 gen_type_die (formal_type
, context_die
);
8142 /* Generate a DIE to represent a declared function (either file-scope or
8146 gen_subprogram_die (decl
, context_die
)
8148 register dw_die_ref context_die
;
8150 char label_id
[MAX_ARTIFICIAL_LABEL_BYTES
];
8151 register tree origin
= decl_ultimate_origin (decl
);
8152 register dw_die_ref subr_die
;
8153 register rtx fp_reg
;
8154 register tree fn_arg_types
;
8155 register tree outer_scope
;
8156 register dw_die_ref old_die
= lookup_decl_die (decl
);
8157 register int declaration
8158 = (current_function_decl
!= decl
8160 && (context_die
->die_tag
== DW_TAG_structure_type
8161 || context_die
->die_tag
== DW_TAG_union_type
)));
8165 subr_die
= new_die (DW_TAG_subprogram
, context_die
);
8166 add_abstract_origin_attribute (subr_die
, origin
);
8168 else if (old_die
&& DECL_ABSTRACT (decl
)
8169 && get_AT_unsigned (old_die
, DW_AT_inline
))
8171 /* This must be a redefinition of an extern inline function.
8172 We can just reuse the old die here. */
8175 /* Clear out the inlined attribute and parm types. */
8176 remove_AT (subr_die
, DW_AT_inline
);
8177 remove_children (subr_die
);
8181 register unsigned file_index
8182 = lookup_filename (DECL_SOURCE_FILE (decl
));
8184 if (get_AT_flag (old_die
, DW_AT_declaration
) != 1)
8186 /* ??? This can happen if there is a bug in the program, for
8187 instance, if it has duplicate function definitions. Ideally,
8188 we should detect this case and ignore it. For now, if we have
8189 already reported an error, any error at all, then assume that
8190 we got here because of a input error, not a dwarf2 bug. */
8191 extern int errorcount
;
8197 /* If the definition comes from the same place as the declaration,
8198 maybe use the old DIE. We always want the DIE for this function
8199 that has the *_pc attributes to be under comp_unit_die so the
8200 debugger can find it. For inlines, that is the concrete instance,
8201 so we can use the old DIE here. For non-inline methods, we want a
8202 specification DIE at toplevel, so we need a new DIE. For local
8203 class methods, this does not apply. */
8204 if ((DECL_ABSTRACT (decl
) || old_die
->die_parent
== comp_unit_die
8205 || context_die
== NULL
)
8206 && get_AT_unsigned (old_die
, DW_AT_decl_file
) == file_index
8207 && (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8208 == DECL_SOURCE_LINE (decl
)))
8212 /* Clear out the declaration attribute and the parm types. */
8213 remove_AT (subr_die
, DW_AT_declaration
);
8214 remove_children (subr_die
);
8218 subr_die
= new_die (DW_TAG_subprogram
, context_die
);
8219 add_AT_die_ref (subr_die
, DW_AT_specification
, old_die
);
8220 if (get_AT_unsigned (old_die
, DW_AT_decl_file
) != file_index
)
8221 add_AT_unsigned (subr_die
, DW_AT_decl_file
, file_index
);
8222 if (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8223 != DECL_SOURCE_LINE (decl
))
8225 (subr_die
, DW_AT_decl_line
, DECL_SOURCE_LINE (decl
));
8230 register dw_die_ref scope_die
;
8232 if (DECL_CONTEXT (decl
))
8233 scope_die
= scope_die_for (decl
, context_die
);
8235 /* Don't put block extern declarations under comp_unit_die. */
8236 scope_die
= context_die
;
8238 subr_die
= new_die (DW_TAG_subprogram
, scope_die
);
8240 if (TREE_PUBLIC (decl
))
8241 add_AT_flag (subr_die
, DW_AT_external
, 1);
8243 add_name_and_src_coords_attributes (subr_die
, decl
);
8244 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8246 register tree type
= TREE_TYPE (decl
);
8248 add_prototyped_attribute (subr_die
, type
);
8249 add_type_attribute (subr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8252 add_pure_or_virtual_attribute (subr_die
, decl
);
8253 if (DECL_ARTIFICIAL (decl
))
8254 add_AT_flag (subr_die
, DW_AT_artificial
, 1);
8255 if (TREE_PROTECTED (decl
))
8256 add_AT_unsigned (subr_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8257 else if (TREE_PRIVATE (decl
))
8258 add_AT_unsigned (subr_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8263 add_AT_flag (subr_die
, DW_AT_declaration
, 1);
8265 /* The first time we see a member function, it is in the context of
8266 the class to which it belongs. We make sure of this by emitting
8267 the class first. The next time is the definition, which is
8268 handled above. The two may come from the same source text. */
8269 if (DECL_CONTEXT (decl
))
8270 equate_decl_number_to_die (decl
, subr_die
);
8272 else if (DECL_ABSTRACT (decl
))
8274 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8275 but not for extern inline functions. We can't get this completely
8276 correct because information about whether the function was declared
8277 inline is not saved anywhere. */
8278 if (DECL_DEFER_OUTPUT (decl
))
8280 if (DECL_INLINE (decl
))
8281 add_AT_unsigned (subr_die
, DW_AT_inline
, DW_INL_declared_inlined
);
8283 add_AT_unsigned (subr_die
, DW_AT_inline
,
8284 DW_INL_declared_not_inlined
);
8286 else if (DECL_INLINE (decl
))
8287 add_AT_unsigned (subr_die
, DW_AT_inline
, DW_INL_inlined
);
8291 equate_decl_number_to_die (decl
, subr_die
);
8293 else if (!DECL_EXTERNAL (decl
))
8295 if (origin
== NULL_TREE
)
8296 equate_decl_number_to_die (decl
, subr_die
);
8298 ASM_GENERATE_INTERNAL_LABEL (label_id
, FUNC_BEGIN_LABEL
,
8299 current_funcdef_number
);
8300 add_AT_lbl_id (subr_die
, DW_AT_low_pc
, label_id
);
8301 ASM_GENERATE_INTERNAL_LABEL (label_id
, FUNC_END_LABEL
,
8302 current_funcdef_number
);
8303 add_AT_lbl_id (subr_die
, DW_AT_high_pc
, label_id
);
8305 add_pubname (decl
, subr_die
);
8306 add_arange (decl
, subr_die
);
8308 #ifdef MIPS_DEBUGGING_INFO
8309 /* Add a reference to the FDE for this routine. */
8310 add_AT_fde_ref (subr_die
, DW_AT_MIPS_fde
, current_funcdef_fde
);
8313 /* Define the "frame base" location for this routine. We use the
8314 frame pointer or stack pointer registers, since the RTL for local
8315 variables is relative to one of them. */
8317 = frame_pointer_needed
? hard_frame_pointer_rtx
: stack_pointer_rtx
;
8318 add_AT_loc (subr_die
, DW_AT_frame_base
, reg_loc_descriptor (fp_reg
));
8321 /* ??? This fails for nested inline functions, because context_display
8322 is not part of the state saved/restored for inline functions. */
8323 if (current_function_needs_context
)
8324 add_AT_location_description (subr_die
, DW_AT_static_link
,
8325 lookup_static_chain (decl
));
8329 /* Now output descriptions of the arguments for this function. This gets
8330 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8331 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8332 `...' at the end of the formal parameter list. In order to find out if
8333 there was a trailing ellipsis or not, we must instead look at the type
8334 associated with the FUNCTION_DECL. This will be a node of type
8335 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8336 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8337 an ellipsis at the end. */
8338 push_decl_scope (decl
);
8340 /* In the case where we are describing a mere function declaration, all we
8341 need to do here (and all we *can* do here) is to describe the *types* of
8342 its formal parameters. */
8343 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
8345 else if (declaration
)
8346 gen_formal_types_die (TREE_TYPE (decl
), subr_die
);
8349 /* Generate DIEs to represent all known formal parameters */
8350 register tree arg_decls
= DECL_ARGUMENTS (decl
);
8353 /* When generating DIEs, generate the unspecified_parameters DIE
8354 instead if we come across the arg "__builtin_va_alist" */
8355 for (parm
= arg_decls
; parm
; parm
= TREE_CHAIN (parm
))
8356 if (TREE_CODE (parm
) == PARM_DECL
)
8358 if (DECL_NAME (parm
)
8359 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm
)),
8360 "__builtin_va_alist"))
8361 gen_unspecified_parameters_die (parm
, subr_die
);
8363 gen_decl_die (parm
, subr_die
);
8366 /* Decide whether we need a unspecified_parameters DIE at the end.
8367 There are 2 more cases to do this for: 1) the ansi ... declaration -
8368 this is detectable when the end of the arg list is not a
8369 void_type_node 2) an unprototyped function declaration (not a
8370 definition). This just means that we have no info about the
8371 parameters at all. */
8372 fn_arg_types
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8373 if (fn_arg_types
!= NULL
)
8375 /* this is the prototyped case, check for ... */
8376 if (TREE_VALUE (tree_last (fn_arg_types
)) != void_type_node
)
8377 gen_unspecified_parameters_die (decl
, subr_die
);
8379 else if (DECL_INITIAL (decl
) == NULL_TREE
)
8380 gen_unspecified_parameters_die (decl
, subr_die
);
8383 /* Output Dwarf info for all of the stuff within the body of the function
8384 (if it has one - it may be just a declaration). */
8385 outer_scope
= DECL_INITIAL (decl
);
8387 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8388 node created to represent a function. This outermost BLOCK actually
8389 represents the outermost binding contour for the function, i.e. the
8390 contour in which the function's formal parameters and labels get
8391 declared. Curiously, it appears that the front end doesn't actually
8392 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8393 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8394 list for the function instead.) The BLOCK_VARS list for the
8395 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8396 the function however, and we output DWARF info for those in
8397 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8398 node representing the function's outermost pair of curly braces, and
8399 any blocks used for the base and member initializers of a C++
8400 constructor function. */
8401 if (! declaration
&& TREE_CODE (outer_scope
) != ERROR_MARK
)
8403 current_function_has_inlines
= 0;
8404 decls_for_scope (outer_scope
, subr_die
, 0);
8406 #if 0 && defined (MIPS_DEBUGGING_INFO)
8407 if (current_function_has_inlines
)
8409 add_AT_flag (subr_die
, DW_AT_MIPS_has_inlines
, 1);
8410 if (! comp_unit_has_inlines
)
8412 add_AT_flag (comp_unit_die
, DW_AT_MIPS_has_inlines
, 1);
8413 comp_unit_has_inlines
= 1;
8422 /* Generate a DIE to represent a declared data object. */
8425 gen_variable_die (decl
, context_die
)
8427 register dw_die_ref context_die
;
8429 register tree origin
= decl_ultimate_origin (decl
);
8430 register dw_die_ref var_die
= new_die (DW_TAG_variable
, context_die
);
8432 dw_die_ref old_die
= lookup_decl_die (decl
);
8434 = (DECL_EXTERNAL (decl
)
8435 || current_function_decl
!= decl_function_context (decl
)
8436 || context_die
->die_tag
== DW_TAG_structure_type
8437 || context_die
->die_tag
== DW_TAG_union_type
);
8440 add_abstract_origin_attribute (var_die
, origin
);
8441 /* Loop unrolling can create multiple blocks that refer to the same
8442 static variable, so we must test for the DW_AT_declaration flag. */
8443 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8444 copy decls and set the DECL_ABSTRACT flag on them instead of
8446 else if (old_die
&& TREE_STATIC (decl
)
8447 && get_AT_flag (old_die
, DW_AT_declaration
) == 1)
8449 /* ??? This is an instantiation of a C++ class level static. */
8450 add_AT_die_ref (var_die
, DW_AT_specification
, old_die
);
8451 if (DECL_NAME (decl
))
8453 register unsigned file_index
8454 = lookup_filename (DECL_SOURCE_FILE (decl
));
8456 if (get_AT_unsigned (old_die
, DW_AT_decl_file
) != file_index
)
8457 add_AT_unsigned (var_die
, DW_AT_decl_file
, file_index
);
8459 if (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8460 != DECL_SOURCE_LINE (decl
))
8462 add_AT_unsigned (var_die
, DW_AT_decl_line
,
8463 DECL_SOURCE_LINE (decl
));
8468 add_name_and_src_coords_attributes (var_die
, decl
);
8469 add_type_attribute (var_die
, TREE_TYPE (decl
),
8470 TREE_READONLY (decl
),
8471 TREE_THIS_VOLATILE (decl
), context_die
);
8473 if (TREE_PUBLIC (decl
))
8474 add_AT_flag (var_die
, DW_AT_external
, 1);
8476 if (DECL_ARTIFICIAL (decl
))
8477 add_AT_flag (var_die
, DW_AT_artificial
, 1);
8479 if (TREE_PROTECTED (decl
))
8480 add_AT_unsigned (var_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8482 else if (TREE_PRIVATE (decl
))
8483 add_AT_unsigned (var_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8487 add_AT_flag (var_die
, DW_AT_declaration
, 1);
8489 if ((declaration
&& decl_class_context (decl
)) || DECL_ABSTRACT (decl
))
8490 equate_decl_number_to_die (decl
, var_die
);
8492 if (! declaration
&& ! DECL_ABSTRACT (decl
))
8494 equate_decl_number_to_die (decl
, var_die
);
8495 add_location_or_const_value_attribute (var_die
, decl
);
8496 add_pubname (decl
, var_die
);
8500 /* Generate a DIE to represent a label identifier. */
8503 gen_label_die (decl
, context_die
)
8505 register dw_die_ref context_die
;
8507 register tree origin
= decl_ultimate_origin (decl
);
8508 register dw_die_ref lbl_die
= new_die (DW_TAG_label
, context_die
);
8510 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8511 char label2
[MAX_ARTIFICIAL_LABEL_BYTES
];
8514 add_abstract_origin_attribute (lbl_die
, origin
);
8516 add_name_and_src_coords_attributes (lbl_die
, decl
);
8518 if (DECL_ABSTRACT (decl
))
8519 equate_decl_number_to_die (decl
, lbl_die
);
8522 insn
= DECL_RTL (decl
);
8523 if (GET_CODE (insn
) == CODE_LABEL
)
8525 /* When optimization is enabled (via -O) some parts of the compiler
8526 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8527 represent source-level labels which were explicitly declared by
8528 the user. This really shouldn't be happening though, so catch
8529 it if it ever does happen. */
8530 if (INSN_DELETED_P (insn
))
8533 sprintf (label2
, INSN_LABEL_FMT
, current_funcdef_number
);
8534 ASM_GENERATE_INTERNAL_LABEL (label
, label2
,
8535 (unsigned) INSN_UID (insn
));
8536 add_AT_lbl_id (lbl_die
, DW_AT_low_pc
, label
);
8541 /* Generate a DIE for a lexical block. */
8544 gen_lexical_block_die (stmt
, context_die
, depth
)
8546 register dw_die_ref context_die
;
8549 register dw_die_ref stmt_die
= new_die (DW_TAG_lexical_block
, context_die
);
8550 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8552 if (! BLOCK_ABSTRACT (stmt
))
8554 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_BEGIN_LABEL
,
8556 add_AT_lbl_id (stmt_die
, DW_AT_low_pc
, label
);
8557 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_END_LABEL
, next_block_number
);
8558 add_AT_lbl_id (stmt_die
, DW_AT_high_pc
, label
);
8561 push_decl_scope (stmt
);
8562 decls_for_scope (stmt
, stmt_die
, depth
);
8566 /* Generate a DIE for an inlined subprogram. */
8569 gen_inlined_subroutine_die (stmt
, context_die
, depth
)
8571 register dw_die_ref context_die
;
8574 if (! BLOCK_ABSTRACT (stmt
))
8576 register dw_die_ref subr_die
8577 = new_die (DW_TAG_inlined_subroutine
, context_die
);
8578 register tree decl
= block_ultimate_origin (stmt
);
8579 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8581 add_abstract_origin_attribute (subr_die
, decl
);
8582 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_BEGIN_LABEL
,
8584 add_AT_lbl_id (subr_die
, DW_AT_low_pc
, label
);
8585 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_END_LABEL
, next_block_number
);
8586 add_AT_lbl_id (subr_die
, DW_AT_high_pc
, label
);
8587 push_decl_scope (decl
);
8588 decls_for_scope (stmt
, subr_die
, depth
);
8590 current_function_has_inlines
= 1;
8594 /* Generate a DIE for a field in a record, or structure. */
8597 gen_field_die (decl
, context_die
)
8599 register dw_die_ref context_die
;
8601 register dw_die_ref decl_die
= new_die (DW_TAG_member
, context_die
);
8603 add_name_and_src_coords_attributes (decl_die
, decl
);
8604 add_type_attribute (decl_die
, member_declared_type (decl
),
8605 TREE_READONLY (decl
), TREE_THIS_VOLATILE (decl
),
8608 /* If this is a bit field... */
8609 if (DECL_BIT_FIELD_TYPE (decl
))
8611 add_byte_size_attribute (decl_die
, decl
);
8612 add_bit_size_attribute (decl_die
, decl
);
8613 add_bit_offset_attribute (decl_die
, decl
);
8616 if (TREE_CODE (DECL_FIELD_CONTEXT (decl
)) != UNION_TYPE
)
8617 add_data_member_location_attribute (decl_die
, decl
);
8619 if (DECL_ARTIFICIAL (decl
))
8620 add_AT_flag (decl_die
, DW_AT_artificial
, 1);
8622 if (TREE_PROTECTED (decl
))
8623 add_AT_unsigned (decl_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8625 else if (TREE_PRIVATE (decl
))
8626 add_AT_unsigned (decl_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8630 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8631 Use modified_type_die instead.
8632 We keep this code here just in case these types of DIEs may be needed to
8633 represent certain things in other languages (e.g. Pascal) someday. */
8635 gen_pointer_type_die (type
, context_die
)
8637 register dw_die_ref context_die
;
8639 register dw_die_ref ptr_die
8640 = new_die (DW_TAG_pointer_type
, scope_die_for (type
, context_die
));
8642 equate_type_number_to_die (type
, ptr_die
);
8643 add_type_attribute (ptr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8644 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
8647 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8648 Use modified_type_die instead.
8649 We keep this code here just in case these types of DIEs may be needed to
8650 represent certain things in other languages (e.g. Pascal) someday. */
8652 gen_reference_type_die (type
, context_die
)
8654 register dw_die_ref context_die
;
8656 register dw_die_ref ref_die
8657 = new_die (DW_TAG_reference_type
, scope_die_for (type
, context_die
));
8659 equate_type_number_to_die (type
, ref_die
);
8660 add_type_attribute (ref_die
, TREE_TYPE (type
), 0, 0, context_die
);
8661 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
8665 /* Generate a DIE for a pointer to a member type. */
8667 gen_ptr_to_mbr_type_die (type
, context_die
)
8669 register dw_die_ref context_die
;
8671 register dw_die_ref ptr_die
8672 = new_die (DW_TAG_ptr_to_member_type
, scope_die_for (type
, context_die
));
8674 equate_type_number_to_die (type
, ptr_die
);
8675 add_AT_die_ref (ptr_die
, DW_AT_containing_type
,
8676 lookup_type_die (TYPE_OFFSET_BASETYPE (type
)));
8677 add_type_attribute (ptr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8680 /* Generate the DIE for the compilation unit. */
8683 gen_compile_unit_die (main_input_filename
)
8684 register char *main_input_filename
;
8687 char *wd
= getpwd ();
8689 comp_unit_die
= new_die (DW_TAG_compile_unit
, NULL
);
8690 add_name_attribute (comp_unit_die
, main_input_filename
);
8693 add_AT_string (comp_unit_die
, DW_AT_comp_dir
, wd
);
8695 sprintf (producer
, "%s %s", language_string
, version_string
);
8697 #ifdef MIPS_DEBUGGING_INFO
8698 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8699 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8700 not appear in the producer string, the debugger reaches the conclusion
8701 that the object file is stripped and has no debugging information.
8702 To get the MIPS/SGI debugger to believe that there is debugging
8703 information in the object file, we add a -g to the producer string. */
8704 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8705 strcat (producer
, " -g");
8708 add_AT_string (comp_unit_die
, DW_AT_producer
, producer
);
8710 if (strcmp (language_string
, "GNU C++") == 0)
8711 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C_plus_plus
);
8713 else if (strcmp (language_string
, "GNU Ada") == 0)
8714 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Ada83
);
8716 else if (strcmp (language_string
, "GNU F77") == 0)
8717 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Fortran77
);
8719 else if (strcmp (language_string
, "GNU Pascal") == 0)
8720 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Pascal83
);
8722 else if (flag_traditional
)
8723 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C
);
8726 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C89
);
8728 #if 0 /* unimplemented */
8729 if (debug_info_level
>= DINFO_LEVEL_VERBOSE
)
8730 add_AT_unsigned (comp_unit_die
, DW_AT_macro_info
, 0);
8734 /* Generate a DIE for a string type. */
8737 gen_string_type_die (type
, context_die
)
8739 register dw_die_ref context_die
;
8741 register dw_die_ref type_die
8742 = new_die (DW_TAG_string_type
, scope_die_for (type
, context_die
));
8744 equate_type_number_to_die (type
, type_die
);
8746 /* Fudge the string length attribute for now. */
8748 /* TODO: add string length info.
8749 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8750 bound_representation (upper_bound, 0, 'u'); */
8753 /* Generate the DIE for a base class. */
8756 gen_inheritance_die (binfo
, context_die
)
8757 register tree binfo
;
8758 register dw_die_ref context_die
;
8760 dw_die_ref die
= new_die (DW_TAG_inheritance
, context_die
);
8762 add_type_attribute (die
, BINFO_TYPE (binfo
), 0, 0, context_die
);
8763 add_data_member_location_attribute (die
, binfo
);
8765 if (TREE_VIA_VIRTUAL (binfo
))
8766 add_AT_unsigned (die
, DW_AT_virtuality
, DW_VIRTUALITY_virtual
);
8767 if (TREE_VIA_PUBLIC (binfo
))
8768 add_AT_unsigned (die
, DW_AT_accessibility
, DW_ACCESS_public
);
8769 else if (TREE_VIA_PROTECTED (binfo
))
8770 add_AT_unsigned (die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8773 /* Generate a DIE for a class member. */
8776 gen_member_die (type
, context_die
)
8778 register dw_die_ref context_die
;
8780 register tree member
;
8782 /* If this is not an incomplete type, output descriptions of each of its
8783 members. Note that as we output the DIEs necessary to represent the
8784 members of this record or union type, we will also be trying to output
8785 DIEs to represent the *types* of those members. However the `type'
8786 function (above) will specifically avoid generating type DIEs for member
8787 types *within* the list of member DIEs for this (containing) type execpt
8788 for those types (of members) which are explicitly marked as also being
8789 members of this (containing) type themselves. The g++ front- end can
8790 force any given type to be treated as a member of some other
8791 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8792 to point to the TREE node representing the appropriate (containing)
8795 /* First output info about the base classes. */
8796 if (TYPE_BINFO (type
) && TYPE_BINFO_BASETYPES (type
))
8798 register tree bases
= TYPE_BINFO_BASETYPES (type
);
8799 register int n_bases
= TREE_VEC_LENGTH (bases
);
8802 for (i
= 0; i
< n_bases
; i
++)
8803 gen_inheritance_die (TREE_VEC_ELT (bases
, i
), context_die
);
8806 /* Now output info about the data members and type members. */
8807 for (member
= TYPE_FIELDS (type
); member
; member
= TREE_CHAIN (member
))
8808 gen_decl_die (member
, context_die
);
8810 /* Now output info about the function members (if any). */
8811 for (member
= TYPE_METHODS (type
); member
; member
= TREE_CHAIN (member
))
8812 gen_decl_die (member
, context_die
);
8815 /* Generate a DIE for a structure or union type. */
8818 gen_struct_or_union_type_die (type
, context_die
)
8820 register dw_die_ref context_die
;
8822 register dw_die_ref type_die
= lookup_type_die (type
);
8823 register dw_die_ref scope_die
= 0;
8824 register int nested
= 0;
8826 if (type_die
&& ! TYPE_SIZE (type
))
8829 if (TYPE_CONTEXT (type
) != NULL_TREE
8830 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't')
8833 scope_die
= scope_die_for (type
, context_die
);
8835 if (! type_die
|| (nested
&& scope_die
== comp_unit_die
))
8836 /* First occurrence of type or toplevel definition of nested class. */
8838 register dw_die_ref old_die
= type_die
;
8840 type_die
= new_die (TREE_CODE (type
) == RECORD_TYPE
8841 ? DW_TAG_structure_type
: DW_TAG_union_type
,
8843 equate_type_number_to_die (type
, type_die
);
8844 add_name_attribute (type_die
, type_tag (type
));
8846 add_AT_die_ref (type_die
, DW_AT_specification
, old_die
);
8849 remove_AT (type_die
, DW_AT_declaration
);
8851 /* If we're not in the right context to be defining this type, defer to
8852 avoid tricky recursion. */
8853 if (TYPE_SIZE (type
) && decl_scope_depth
> 0 && scope_die
== comp_unit_die
)
8855 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8858 /* If this type has been completed, then give it a byte_size attribute and
8859 then give a list of members. */
8860 else if (TYPE_SIZE (type
))
8862 /* Prevent infinite recursion in cases where the type of some member of
8863 this type is expressed in terms of this type itself. */
8864 TREE_ASM_WRITTEN (type
) = 1;
8865 add_byte_size_attribute (type_die
, type
);
8866 if (TYPE_STUB_DECL (type
) != NULL_TREE
)
8867 add_src_coords_attributes (type_die
, TYPE_STUB_DECL (type
));
8869 /* If the first reference to this type was as the return type of an
8870 inline function, then it may not have a parent. Fix this now. */
8871 if (type_die
->die_parent
== NULL
)
8872 add_child_die (scope_die
, type_die
);
8874 push_decl_scope (type
);
8875 gen_member_die (type
, type_die
);
8878 /* GNU extension: Record what type our vtable lives in. */
8879 if (TYPE_VFIELD (type
))
8881 tree vtype
= DECL_FCONTEXT (TYPE_VFIELD (type
));
8883 gen_type_die (vtype
, context_die
);
8884 add_AT_die_ref (type_die
, DW_AT_containing_type
,
8885 lookup_type_die (vtype
));
8889 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8892 /* Generate a DIE for a subroutine _type_. */
8895 gen_subroutine_type_die (type
, context_die
)
8897 register dw_die_ref context_die
;
8899 register tree return_type
= TREE_TYPE (type
);
8900 register dw_die_ref subr_die
8901 = new_die (DW_TAG_subroutine_type
, scope_die_for (type
, context_die
));
8903 equate_type_number_to_die (type
, subr_die
);
8904 add_prototyped_attribute (subr_die
, type
);
8905 add_type_attribute (subr_die
, return_type
, 0, 0, context_die
);
8906 gen_formal_types_die (type
, subr_die
);
8909 /* Generate a DIE for a type definition */
8912 gen_typedef_die (decl
, context_die
)
8914 register dw_die_ref context_die
;
8916 register dw_die_ref type_die
;
8917 register tree origin
;
8919 if (TREE_ASM_WRITTEN (decl
))
8921 TREE_ASM_WRITTEN (decl
) = 1;
8923 type_die
= new_die (DW_TAG_typedef
, scope_die_for (decl
, context_die
));
8924 origin
= decl_ultimate_origin (decl
);
8926 add_abstract_origin_attribute (type_die
, origin
);
8930 add_name_and_src_coords_attributes (type_die
, decl
);
8931 if (DECL_ORIGINAL_TYPE (decl
))
8933 type
= DECL_ORIGINAL_TYPE (decl
);
8934 equate_type_number_to_die (TREE_TYPE (decl
), type_die
);
8937 type
= TREE_TYPE (decl
);
8938 add_type_attribute (type_die
, type
, TREE_READONLY (decl
),
8939 TREE_THIS_VOLATILE (decl
), context_die
);
8942 if (DECL_ABSTRACT (decl
))
8943 equate_decl_number_to_die (decl
, type_die
);
8946 /* Generate a type description DIE. */
8949 gen_type_die (type
, context_die
)
8951 register dw_die_ref context_die
;
8953 if (type
== NULL_TREE
|| type
== error_mark_node
)
8956 /* We are going to output a DIE to represent the unqualified version of
8957 this type (i.e. without any const or volatile qualifiers) so get the
8958 main variant (i.e. the unqualified version) of this type now. */
8959 type
= type_main_variant (type
);
8961 if (TREE_ASM_WRITTEN (type
))
8964 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8965 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
8967 TREE_ASM_WRITTEN (type
) = 1;
8968 gen_decl_die (TYPE_NAME (type
), context_die
);
8972 switch (TREE_CODE (type
))
8978 case REFERENCE_TYPE
:
8979 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8980 ensures that the gen_type_die recursion will terminate even if the
8981 type is recursive. Recursive types are possible in Ada. */
8982 /* ??? We could perhaps do this for all types before the switch
8984 TREE_ASM_WRITTEN (type
) = 1;
8986 /* For these types, all that is required is that we output a DIE (or a
8987 set of DIEs) to represent the "basis" type. */
8988 gen_type_die (TREE_TYPE (type
), context_die
);
8992 /* This code is used for C++ pointer-to-data-member types.
8993 Output a description of the relevant class type. */
8994 gen_type_die (TYPE_OFFSET_BASETYPE (type
), context_die
);
8996 /* Output a description of the type of the object pointed to. */
8997 gen_type_die (TREE_TYPE (type
), context_die
);
8999 /* Now output a DIE to represent this pointer-to-data-member type
9001 gen_ptr_to_mbr_type_die (type
, context_die
);
9005 gen_type_die (TYPE_DOMAIN (type
), context_die
);
9006 gen_set_type_die (type
, context_die
);
9010 gen_type_die (TREE_TYPE (type
), context_die
);
9011 abort (); /* No way to represent these in Dwarf yet! */
9015 /* Force out return type (in case it wasn't forced out already). */
9016 gen_type_die (TREE_TYPE (type
), context_die
);
9017 gen_subroutine_type_die (type
, context_die
);
9021 /* Force out return type (in case it wasn't forced out already). */
9022 gen_type_die (TREE_TYPE (type
), context_die
);
9023 gen_subroutine_type_die (type
, context_die
);
9027 if (TYPE_STRING_FLAG (type
) && TREE_CODE (TREE_TYPE (type
)) == CHAR_TYPE
)
9029 gen_type_die (TREE_TYPE (type
), context_die
);
9030 gen_string_type_die (type
, context_die
);
9033 gen_array_type_die (type
, context_die
);
9039 case QUAL_UNION_TYPE
:
9040 /* If this is a nested type whose containing class hasn't been
9041 written out yet, writing it out will cover this one, too. */
9042 if (TYPE_CONTEXT (type
)
9043 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't'
9044 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9046 gen_type_die (TYPE_CONTEXT (type
), context_die
);
9048 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9051 /* If that failed, attach ourselves to the stub. */
9052 push_decl_scope (TYPE_CONTEXT (type
));
9053 context_die
= lookup_type_die (TYPE_CONTEXT (type
));
9056 if (TREE_CODE (type
) == ENUMERAL_TYPE
)
9057 gen_enumeration_type_die (type
, context_die
);
9059 gen_struct_or_union_type_die (type
, context_die
);
9061 if (TYPE_CONTEXT (type
)
9062 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't'
9063 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9066 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9067 it up if it is ever completed. gen_*_type_die will set it for us
9068 when appropriate. */
9077 /* No DIEs needed for fundamental types. */
9081 /* No Dwarf representation currently defined. */
9088 TREE_ASM_WRITTEN (type
) = 1;
9091 /* Generate a DIE for a tagged type instantiation. */
9094 gen_tagged_type_instantiation_die (type
, context_die
)
9096 register dw_die_ref context_die
;
9098 if (type
== NULL_TREE
|| type
== error_mark_node
)
9101 /* We are going to output a DIE to represent the unqualified version of
9102 this type (i.e. without any const or volatile qualifiers) so make sure
9103 that we have the main variant (i.e. the unqualified version) of this
9105 if (type
!= type_main_variant (type
)
9106 || !TREE_ASM_WRITTEN (type
))
9109 switch (TREE_CODE (type
))
9115 gen_inlined_enumeration_type_die (type
, context_die
);
9119 gen_inlined_structure_type_die (type
, context_die
);
9123 case QUAL_UNION_TYPE
:
9124 gen_inlined_union_type_die (type
, context_die
);
9132 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9133 things which are local to the given block. */
9136 gen_block_die (stmt
, context_die
, depth
)
9138 register dw_die_ref context_die
;
9141 register int must_output_die
= 0;
9142 register tree origin
;
9144 register enum tree_code origin_code
;
9146 /* Ignore blocks never really used to make RTL. */
9148 if (stmt
== NULL_TREE
|| !TREE_USED (stmt
))
9151 /* Determine the "ultimate origin" of this block. This block may be an
9152 inlined instance of an inlined instance of inline function, so we have
9153 to trace all of the way back through the origin chain to find out what
9154 sort of node actually served as the original seed for the creation of
9155 the current block. */
9156 origin
= block_ultimate_origin (stmt
);
9157 origin_code
= (origin
!= NULL
) ? TREE_CODE (origin
) : ERROR_MARK
;
9159 /* Determine if we need to output any Dwarf DIEs at all to represent this
9161 if (origin_code
== FUNCTION_DECL
)
9162 /* The outer scopes for inlinings *must* always be represented. We
9163 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9164 must_output_die
= 1;
9167 /* In the case where the current block represents an inlining of the
9168 "body block" of an inline function, we must *NOT* output any DIE for
9169 this block because we have already output a DIE to represent the
9170 whole inlined function scope and the "body block" of any function
9171 doesn't really represent a different scope according to ANSI C
9172 rules. So we check here to make sure that this block does not
9173 represent a "body block inlining" before trying to set the
9174 `must_output_die' flag. */
9175 if (! is_body_block (origin
? origin
: stmt
))
9177 /* Determine if this block directly contains any "significant"
9178 local declarations which we will need to output DIEs for. */
9179 if (debug_info_level
> DINFO_LEVEL_TERSE
)
9180 /* We are not in terse mode so *any* local declaration counts
9181 as being a "significant" one. */
9182 must_output_die
= (BLOCK_VARS (stmt
) != NULL
);
9184 /* We are in terse mode, so only local (nested) function
9185 definitions count as "significant" local declarations. */
9186 for (decl
= BLOCK_VARS (stmt
);
9187 decl
!= NULL
; decl
= TREE_CHAIN (decl
))
9188 if (TREE_CODE (decl
) == FUNCTION_DECL
9189 && DECL_INITIAL (decl
))
9191 must_output_die
= 1;
9197 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9198 DIE for any block which contains no significant local declarations at
9199 all. Rather, in such cases we just call `decls_for_scope' so that any
9200 needed Dwarf info for any sub-blocks will get properly generated. Note
9201 that in terse mode, our definition of what constitutes a "significant"
9202 local declaration gets restricted to include only inlined function
9203 instances and local (nested) function definitions. */
9204 if (must_output_die
)
9206 if (origin_code
== FUNCTION_DECL
)
9207 gen_inlined_subroutine_die (stmt
, context_die
, depth
);
9209 gen_lexical_block_die (stmt
, context_die
, depth
);
9212 decls_for_scope (stmt
, context_die
, depth
);
9215 /* Generate all of the decls declared within a given scope and (recursively)
9216 all of its sub-blocks. */
9219 decls_for_scope (stmt
, context_die
, depth
)
9221 register dw_die_ref context_die
;
9225 register tree subblocks
;
9227 /* Ignore blocks never really used to make RTL. */
9228 if (stmt
== NULL_TREE
|| ! TREE_USED (stmt
))
9231 if (!BLOCK_ABSTRACT (stmt
) && depth
> 0)
9232 next_block_number
++;
9234 /* Output the DIEs to represent all of the data objects and typedefs
9235 declared directly within this block but not within any nested
9236 sub-blocks. Also, nested function and tag DIEs have been
9237 generated with a parent of NULL; fix that up now. */
9238 for (decl
= BLOCK_VARS (stmt
);
9239 decl
!= NULL
; decl
= TREE_CHAIN (decl
))
9241 register dw_die_ref die
;
9243 if (TREE_CODE (decl
) == FUNCTION_DECL
)
9244 die
= lookup_decl_die (decl
);
9245 else if (TREE_CODE (decl
) == TYPE_DECL
&& TYPE_DECL_IS_STUB (decl
))
9246 die
= lookup_type_die (TREE_TYPE (decl
));
9250 if (die
!= NULL
&& die
->die_parent
== NULL
)
9251 add_child_die (context_die
, die
);
9253 gen_decl_die (decl
, context_die
);
9256 /* Output the DIEs to represent all sub-blocks (and the items declared
9257 therein) of this block. */
9258 for (subblocks
= BLOCK_SUBBLOCKS (stmt
);
9260 subblocks
= BLOCK_CHAIN (subblocks
))
9261 gen_block_die (subblocks
, context_die
, depth
+ 1);
9264 /* Is this a typedef we can avoid emitting? */
9267 is_redundant_typedef (decl
)
9270 if (TYPE_DECL_IS_STUB (decl
))
9273 if (DECL_ARTIFICIAL (decl
)
9274 && DECL_CONTEXT (decl
)
9275 && is_tagged_type (DECL_CONTEXT (decl
))
9276 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl
))) == TYPE_DECL
9277 && DECL_NAME (decl
) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl
))))
9278 /* Also ignore the artificial member typedef for the class name. */
9284 /* Generate Dwarf debug information for a decl described by DECL. */
9287 gen_decl_die (decl
, context_die
)
9289 register dw_die_ref context_die
;
9291 register tree origin
;
9293 /* Make a note of the decl node we are going to be working on. We may need
9294 to give the user the source coordinates of where it appeared in case we
9295 notice (later on) that something about it looks screwy. */
9296 dwarf_last_decl
= decl
;
9298 if (TREE_CODE (decl
) == ERROR_MARK
)
9301 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9302 ignore a function definition, since that would screw up our count of
9303 blocks, and that in turn will completely screw up the labels we will
9304 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9305 subsequent blocks). */
9306 if (DECL_IGNORED_P (decl
) && TREE_CODE (decl
) != FUNCTION_DECL
)
9309 switch (TREE_CODE (decl
))
9312 /* The individual enumerators of an enum type get output when we output
9313 the Dwarf representation of the relevant enum type itself. */
9317 /* Don't output any DIEs to represent mere function declarations,
9318 unless they are class members or explicit block externs. */
9319 if (DECL_INITIAL (decl
) == NULL_TREE
&& DECL_CONTEXT (decl
) == NULL_TREE
9320 && (current_function_decl
== NULL_TREE
|| ! DECL_ARTIFICIAL (decl
)))
9323 if (debug_info_level
> DINFO_LEVEL_TERSE
)
9325 /* Before we describe the FUNCTION_DECL itself, make sure that we
9326 have described its return type. */
9327 gen_type_die (TREE_TYPE (TREE_TYPE (decl
)), context_die
);
9329 /* And its containing type. */
9330 origin
= decl_class_context (decl
);
9331 if (origin
!= NULL_TREE
)
9332 gen_type_die (origin
, context_die
);
9334 /* And its virtual context. */
9335 if (DECL_VINDEX (decl
) != NULL_TREE
)
9336 gen_type_die (DECL_CONTEXT (decl
), context_die
);
9339 /* Now output a DIE to represent the function itself. */
9340 gen_subprogram_die (decl
, context_die
);
9344 /* If we are in terse mode, don't generate any DIEs to represent any
9346 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9349 /* In the special case of a TYPE_DECL node representing the
9350 declaration of some type tag, if the given TYPE_DECL is marked as
9351 having been instantiated from some other (original) TYPE_DECL node
9352 (e.g. one which was generated within the original definition of an
9353 inline function) we have to generate a special (abbreviated)
9354 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9356 if (TYPE_DECL_IS_STUB (decl
) && DECL_ABSTRACT_ORIGIN (decl
) != NULL_TREE
)
9358 gen_tagged_type_instantiation_die (TREE_TYPE (decl
), context_die
);
9362 if (is_redundant_typedef (decl
))
9363 gen_type_die (TREE_TYPE (decl
), context_die
);
9365 /* Output a DIE to represent the typedef itself. */
9366 gen_typedef_die (decl
, context_die
);
9370 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9371 gen_label_die (decl
, context_die
);
9375 /* If we are in terse mode, don't generate any DIEs to represent any
9376 variable declarations or definitions. */
9377 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9380 /* Output any DIEs that are needed to specify the type of this data
9382 gen_type_die (TREE_TYPE (decl
), context_die
);
9384 /* And its containing type. */
9385 origin
= decl_class_context (decl
);
9386 if (origin
!= NULL_TREE
)
9387 gen_type_die (origin
, context_die
);
9389 /* Now output the DIE to represent the data object itself. This gets
9390 complicated because of the possibility that the VAR_DECL really
9391 represents an inlined instance of a formal parameter for an inline
9393 origin
= decl_ultimate_origin (decl
);
9394 if (origin
!= NULL_TREE
&& TREE_CODE (origin
) == PARM_DECL
)
9395 gen_formal_parameter_die (decl
, context_die
);
9397 gen_variable_die (decl
, context_die
);
9401 /* Ignore the nameless fields that are used to skip bits, but
9402 handle C++ anonymous unions. */
9403 if (DECL_NAME (decl
) != NULL_TREE
9404 || TREE_CODE (TREE_TYPE (decl
)) == UNION_TYPE
)
9406 gen_type_die (member_declared_type (decl
), context_die
);
9407 gen_field_die (decl
, context_die
);
9412 gen_type_die (TREE_TYPE (decl
), context_die
);
9413 gen_formal_parameter_die (decl
, context_die
);
9421 /* Write the debugging output for DECL. */
9424 dwarf2out_decl (decl
)
9427 register dw_die_ref context_die
= comp_unit_die
;
9429 if (TREE_CODE (decl
) == ERROR_MARK
)
9432 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9433 hope that the node in question doesn't represent a function definition.
9434 If it does, then totally ignoring it is bound to screw up our count of
9435 blocks, and that in turn will completely screw up the labels we will
9436 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9437 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9438 own sequence numbers with them!) */
9439 if (DECL_IGNORED_P (decl
))
9441 if (TREE_CODE (decl
) == FUNCTION_DECL
9442 && DECL_INITIAL (decl
) != NULL
)
9448 switch (TREE_CODE (decl
))
9451 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9452 builtin function. Explicit programmer-supplied declarations of
9453 these same functions should NOT be ignored however. */
9454 if (DECL_EXTERNAL (decl
) && DECL_FUNCTION_CODE (decl
))
9457 /* What we would really like to do here is to filter out all mere
9458 file-scope declarations of file-scope functions which are never
9459 referenced later within this translation unit (and keep all of ones
9460 that *are* referenced later on) but we aren't clairvoyant, so we have
9461 no idea which functions will be referenced in the future (i.e. later
9462 on within the current translation unit). So here we just ignore all
9463 file-scope function declarations which are not also definitions. If
9464 and when the debugger needs to know something about these functions,
9465 it wil have to hunt around and find the DWARF information associated
9466 with the definition of the function. Note that we can't just check
9467 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9468 definitions and which ones represent mere declarations. We have to
9469 check `DECL_INITIAL' instead. That's because the C front-end
9470 supports some weird semantics for "extern inline" function
9471 definitions. These can get inlined within the current translation
9472 unit (an thus, we need to generate DWARF info for their abstract
9473 instances so that the DWARF info for the concrete inlined instances
9474 can have something to refer to) but the compiler never generates any
9475 out-of-lines instances of such things (despite the fact that they
9476 *are* definitions). The important point is that the C front-end
9477 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9478 to generate DWARF for them anyway. Note that the C++ front-end also
9479 plays some similar games for inline function definitions appearing
9480 within include files which also contain
9481 `#pragma interface' pragmas. */
9482 if (DECL_INITIAL (decl
) == NULL_TREE
)
9485 /* If we're a nested function, initially use a parent of NULL; if we're
9486 a plain function, this will be fixed up in decls_for_scope. If
9487 we're a method, it will be ignored, since we already have a DIE. */
9488 if (decl_function_context (decl
))
9494 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9495 declaration and if the declaration was never even referenced from
9496 within this entire compilation unit. We suppress these DIEs in
9497 order to save space in the .debug section (by eliminating entries
9498 which are probably useless). Note that we must not suppress
9499 block-local extern declarations (whether used or not) because that
9500 would screw-up the debugger's name lookup mechanism and cause it to
9501 miss things which really ought to be in scope at a given point. */
9502 if (DECL_EXTERNAL (decl
) && !TREE_USED (decl
))
9505 /* If we are in terse mode, don't generate any DIEs to represent any
9506 variable declarations or definitions. */
9507 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9512 /* Don't bother trying to generate any DIEs to represent any of the
9513 normal built-in types for the language we are compiling. */
9514 if (DECL_SOURCE_LINE (decl
) == 0)
9516 /* OK, we need to generate one for `bool' so GDB knows what type
9517 comparisons have. */
9518 if ((get_AT_unsigned (comp_unit_die
, DW_AT_language
)
9519 == DW_LANG_C_plus_plus
)
9520 && TREE_CODE (TREE_TYPE (decl
)) == BOOLEAN_TYPE
)
9521 modified_type_die (TREE_TYPE (decl
), 0, 0, NULL
);
9526 /* If we are in terse mode, don't generate any DIEs for types. */
9527 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9530 /* If we're a function-scope tag, initially use a parent of NULL;
9531 this will be fixed up in decls_for_scope. */
9532 if (decl_function_context (decl
))
9541 gen_decl_die (decl
, context_die
);
9542 output_pending_types_for_scope (comp_unit_die
);
9545 /* Output a marker (i.e. a label) for the beginning of the generated code for
9549 dwarf2out_begin_block (blocknum
)
9550 register unsigned blocknum
;
9552 function_section (current_function_decl
);
9553 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BLOCK_BEGIN_LABEL
, blocknum
);
9556 /* Output a marker (i.e. a label) for the end of the generated code for a
9560 dwarf2out_end_block (blocknum
)
9561 register unsigned blocknum
;
9563 function_section (current_function_decl
);
9564 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BLOCK_END_LABEL
, blocknum
);
9567 /* Output a marker (i.e. a label) at a point in the assembly code which
9568 corresponds to a given source level label. */
9571 dwarf2out_label (insn
)
9574 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
9576 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9578 function_section (current_function_decl
);
9579 sprintf (label
, INSN_LABEL_FMT
, current_funcdef_number
);
9580 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, label
,
9581 (unsigned) INSN_UID (insn
));
9585 /* Lookup a filename (in the list of filenames that we know about here in
9586 dwarf2out.c) and return its "index". The index of each (known) filename is
9587 just a unique number which is associated with only that one filename.
9588 We need such numbers for the sake of generating labels
9589 (in the .debug_sfnames section) and references to those
9590 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9591 If the filename given as an argument is not found in our current list,
9592 add it to the list and assign it the next available unique index number.
9593 In order to speed up searches, we remember the index of the filename
9594 was looked up last. This handles the majority of all searches. */
9597 lookup_filename (file_name
)
9600 static unsigned last_file_lookup_index
= 0;
9601 register unsigned i
;
9603 /* Check to see if the file name that was searched on the previous call
9604 matches this file name. If so, return the index. */
9605 if (last_file_lookup_index
!= 0)
9606 if (strcmp (file_name
, file_table
[last_file_lookup_index
]) == 0)
9607 return last_file_lookup_index
;
9609 /* Didn't match the previous lookup, search the table */
9610 for (i
= 1; i
< file_table_in_use
; ++i
)
9611 if (strcmp (file_name
, file_table
[i
]) == 0)
9613 last_file_lookup_index
= i
;
9617 /* Prepare to add a new table entry by making sure there is enough space in
9618 the table to do so. If not, expand the current table. */
9619 if (file_table_in_use
== file_table_allocated
)
9621 file_table_allocated
+= FILE_TABLE_INCREMENT
;
9623 = (char **) xrealloc (file_table
,
9624 file_table_allocated
* sizeof (char *));
9627 /* Add the new entry to the end of the filename table. */
9628 file_table
[file_table_in_use
] = xstrdup (file_name
);
9629 last_file_lookup_index
= file_table_in_use
++;
9631 return last_file_lookup_index
;
9634 /* Output a label to mark the beginning of a source code line entry
9635 and record information relating to this source line, in
9636 'line_info_table' for later output of the .debug_line section. */
9639 dwarf2out_line (filename
, line
)
9640 register char *filename
;
9641 register unsigned line
;
9643 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9645 function_section (current_function_decl
);
9647 if (DECL_SECTION_NAME (current_function_decl
))
9649 register dw_separate_line_info_ref line_info
;
9650 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, SEPARATE_LINE_CODE_LABEL
,
9651 separate_line_info_table_in_use
);
9652 fputc ('\n', asm_out_file
);
9654 /* expand the line info table if necessary */
9655 if (separate_line_info_table_in_use
9656 == separate_line_info_table_allocated
)
9658 separate_line_info_table_allocated
+= LINE_INFO_TABLE_INCREMENT
;
9659 separate_line_info_table
9660 = (dw_separate_line_info_ref
)
9661 xrealloc (separate_line_info_table
,
9662 separate_line_info_table_allocated
9663 * sizeof (dw_separate_line_info_entry
));
9666 /* Add the new entry at the end of the line_info_table. */
9668 = &separate_line_info_table
[separate_line_info_table_in_use
++];
9669 line_info
->dw_file_num
= lookup_filename (filename
);
9670 line_info
->dw_line_num
= line
;
9671 line_info
->function
= current_funcdef_number
;
9675 register dw_line_info_ref line_info
;
9677 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, LINE_CODE_LABEL
,
9678 line_info_table_in_use
);
9679 fputc ('\n', asm_out_file
);
9681 /* Expand the line info table if necessary. */
9682 if (line_info_table_in_use
== line_info_table_allocated
)
9684 line_info_table_allocated
+= LINE_INFO_TABLE_INCREMENT
;
9686 = (dw_line_info_ref
)
9687 xrealloc (line_info_table
,
9688 (line_info_table_allocated
9689 * sizeof (dw_line_info_entry
)));
9692 /* Add the new entry at the end of the line_info_table. */
9693 line_info
= &line_info_table
[line_info_table_in_use
++];
9694 line_info
->dw_file_num
= lookup_filename (filename
);
9695 line_info
->dw_line_num
= line
;
9700 /* Record the beginning of a new source file, for later output
9701 of the .debug_macinfo section. At present, unimplemented. */
9704 dwarf2out_start_source_file (filename
)
9705 register char *filename ATTRIBUTE_UNUSED
;
9709 /* Record the end of a source file, for later output
9710 of the .debug_macinfo section. At present, unimplemented. */
9713 dwarf2out_end_source_file ()
9717 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9718 the tail part of the directive line, i.e. the part which is past the
9719 initial whitespace, #, whitespace, directive-name, whitespace part. */
9722 dwarf2out_define (lineno
, buffer
)
9723 register unsigned lineno
;
9724 register char *buffer
;
9726 static int initialized
= 0;
9729 dwarf2out_start_source_file (primary_filename
);
9734 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9735 the tail part of the directive line, i.e. the part which is past the
9736 initial whitespace, #, whitespace, directive-name, whitespace part. */
9739 dwarf2out_undef (lineno
, buffer
)
9740 register unsigned lineno ATTRIBUTE_UNUSED
;
9741 register char *buffer ATTRIBUTE_UNUSED
;
9745 /* Set up for Dwarf output at the start of compilation. */
9748 dwarf2out_init (asm_out_file
, main_input_filename
)
9749 register FILE *asm_out_file
;
9750 register char *main_input_filename
;
9752 /* Remember the name of the primary input file. */
9753 primary_filename
= main_input_filename
;
9755 /* Allocate the initial hunk of the file_table. */
9756 file_table
= (char **) xmalloc (FILE_TABLE_INCREMENT
* sizeof (char *));
9757 bzero ((char *) file_table
, FILE_TABLE_INCREMENT
* sizeof (char *));
9758 file_table_allocated
= FILE_TABLE_INCREMENT
;
9760 /* Skip the first entry - file numbers begin at 1. */
9761 file_table_in_use
= 1;
9763 /* Allocate the initial hunk of the decl_die_table. */
9765 = (dw_die_ref
*) xmalloc (DECL_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9766 bzero ((char *) decl_die_table
,
9767 DECL_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9768 decl_die_table_allocated
= DECL_DIE_TABLE_INCREMENT
;
9769 decl_die_table_in_use
= 0;
9771 /* Allocate the initial hunk of the decl_scope_table. */
9773 = (decl_scope_node
*) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9774 * sizeof (decl_scope_node
));
9775 bzero ((char *) decl_scope_table
,
9776 DECL_SCOPE_TABLE_INCREMENT
* sizeof (decl_scope_node
));
9777 decl_scope_table_allocated
= DECL_SCOPE_TABLE_INCREMENT
;
9778 decl_scope_depth
= 0;
9780 /* Allocate the initial hunk of the abbrev_die_table. */
9782 = (dw_die_ref
*) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9783 * sizeof (dw_die_ref
));
9784 bzero ((char *) abbrev_die_table
,
9785 ABBREV_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9786 abbrev_die_table_allocated
= ABBREV_DIE_TABLE_INCREMENT
;
9787 /* Zero-th entry is allocated, but unused */
9788 abbrev_die_table_in_use
= 1;
9790 /* Allocate the initial hunk of the line_info_table. */
9792 = (dw_line_info_ref
) xmalloc (LINE_INFO_TABLE_INCREMENT
9793 * sizeof (dw_line_info_entry
));
9794 bzero ((char *) line_info_table
,
9795 LINE_INFO_TABLE_INCREMENT
* sizeof (dw_line_info_entry
));
9796 line_info_table_allocated
= LINE_INFO_TABLE_INCREMENT
;
9797 /* Zero-th entry is allocated, but unused */
9798 line_info_table_in_use
= 1;
9800 /* Generate the initial DIE for the .debug section. Note that the (string)
9801 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9802 will (typically) be a relative pathname and that this pathname should be
9803 taken as being relative to the directory from which the compiler was
9804 invoked when the given (base) source file was compiled. */
9805 gen_compile_unit_die (main_input_filename
);
9807 ASM_GENERATE_INTERNAL_LABEL (text_end_label
, TEXT_END_LABEL
, 0);
9810 /* Output stuff that dwarf requires at the end of every file,
9811 and generate the DWARF-2 debugging info. */
9816 limbo_die_node
*node
, *next_node
;
9820 /* Traverse the limbo die list, and add parent/child links. The only
9821 dies without parents that should be here are concrete instances of
9822 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9823 For concrete instances, we can get the parent die from the abstract
9825 for (node
= limbo_die_list
; node
; node
= next_node
)
9827 next_node
= node
->next
;
9830 if (die
->die_parent
== NULL
)
9832 a
= get_AT (die
, DW_AT_abstract_origin
);
9834 add_child_die (a
->dw_attr_val
.v
.val_die_ref
->die_parent
, die
);
9835 else if (die
== comp_unit_die
)
9843 /* Traverse the DIE tree and add sibling attributes to those DIE's
9844 that have children. */
9845 add_sibling_attributes (comp_unit_die
);
9847 /* Output a terminator label for the .text section. */
9848 fputc ('\n', asm_out_file
);
9849 ASM_OUTPUT_SECTION (asm_out_file
, TEXT_SECTION
);
9850 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, TEXT_END_LABEL
, 0);
9853 /* Output a terminator label for the .data section. */
9854 fputc ('\n', asm_out_file
);
9855 ASM_OUTPUT_SECTION (asm_out_file
, DATA_SECTION
);
9856 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, DATA_END_LABEL
, 0);
9858 /* Output a terminator label for the .bss section. */
9859 fputc ('\n', asm_out_file
);
9860 ASM_OUTPUT_SECTION (asm_out_file
, BSS_SECTION
);
9861 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BSS_END_LABEL
, 0);
9864 /* Output the source line correspondence table. */
9865 if (line_info_table_in_use
> 1 || separate_line_info_table_in_use
)
9867 fputc ('\n', asm_out_file
);
9868 ASM_OUTPUT_SECTION (asm_out_file
, DEBUG_LINE_SECTION
);
9869 output_line_info ();
9871 /* We can only use the low/high_pc attributes if all of the code
9873 if (separate_line_info_table_in_use
== 0)
9875 add_AT_lbl_id (comp_unit_die
, DW_AT_low_pc
,
9876 stripattributes (TEXT_SECTION
));
9877 add_AT_lbl_id (comp_unit_die
, DW_AT_high_pc
, text_end_label
);
9880 add_AT_section_offset (comp_unit_die
, DW_AT_stmt_list
, DEBUG_LINE_SECTION
);
9883 /* Output the abbreviation table. */
9884 fputc ('\n', asm_out_file
);
9885 ASM_OUTPUT_SECTION (asm_out_file
, ABBREV_SECTION
);
9886 build_abbrev_table (comp_unit_die
);
9887 output_abbrev_section ();
9889 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9890 next_die_offset
= DWARF_COMPILE_UNIT_HEADER_SIZE
;
9891 calc_die_sizes (comp_unit_die
);
9893 /* Output debugging information. */
9894 fputc ('\n', asm_out_file
);
9895 ASM_OUTPUT_SECTION (asm_out_file
, DEBUG_INFO_SECTION
);
9896 output_compilation_unit_header ();
9897 output_die (comp_unit_die
);
9899 if (pubname_table_in_use
)
9901 /* Output public names table. */
9902 fputc ('\n', asm_out_file
);
9903 ASM_OUTPUT_SECTION (asm_out_file
, PUBNAMES_SECTION
);
9907 if (fde_table_in_use
)
9909 /* Output the address range information. */
9910 fputc ('\n', asm_out_file
);
9911 ASM_OUTPUT_SECTION (asm_out_file
, ARANGES_SECTION
);
9915 #endif /* DWARF2_DEBUGGING_INFO */