1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 1993, 1995, 1996, 1997 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"
44 /* Decide whether we want to emit frame unwind information for the current
50 return (write_symbols
== DWARF2_DEBUG
51 #ifdef DWARF2_UNWIND_INFO
52 || (flag_exceptions
&& ! exceptions_via_longjmp
)
57 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
63 /* How to start an assembler comment. */
64 #ifndef ASM_COMMENT_START
65 #define ASM_COMMENT_START ";#"
68 typedef struct dw_cfi_struct
*dw_cfi_ref
;
69 typedef struct dw_fde_struct
*dw_fde_ref
;
70 typedef union dw_cfi_oprnd_struct
*dw_cfi_oprnd_ref
;
72 /* Call frames are described using a sequence of Call Frame
73 Information instructions. The register number, offset
74 and address fields are provided as possible operands;
75 their use is selected by the opcode field. */
77 typedef union dw_cfi_oprnd_struct
79 unsigned long dw_cfi_reg_num
;
80 long int dw_cfi_offset
;
85 typedef struct dw_cfi_struct
87 dw_cfi_ref dw_cfi_next
;
88 enum dwarf_call_frame_info dw_cfi_opc
;
89 dw_cfi_oprnd dw_cfi_oprnd1
;
90 dw_cfi_oprnd dw_cfi_oprnd2
;
94 /* All call frame descriptions (FDE's) in the GCC generated DWARF
95 refer to a single Common Information Entry (CIE), defined at
96 the beginning of the .debug_frame section. This used of a single
97 CIE obviates the need to keep track of multiple CIE's
98 in the DWARF generation routines below. */
100 typedef struct dw_fde_struct
103 char *dw_fde_current_label
;
105 dw_cfi_ref dw_fde_cfi
;
109 /* Maximum size (in bytes) of an artificially generated label. */
110 #define MAX_ARTIFICIAL_LABEL_BYTES 30
112 /* Make sure we know the sizes of the various types dwarf can describe. These
113 are only defaults. If the sizes are different for your target, you should
114 override these values by defining the appropriate symbols in your tm.h
117 #ifndef CHAR_TYPE_SIZE
118 #define CHAR_TYPE_SIZE BITS_PER_UNIT
121 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
124 /* The size in bytes of a DWARF field indicating an offset or length
125 relative to a debug info section, specified to be 4 bytes in the DWARF-2
126 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
128 #ifndef DWARF_OFFSET_SIZE
129 #define DWARF_OFFSET_SIZE 4
132 #define DWARF_VERSION 2
134 /* Round SIZE up to the nearest BOUNDARY. */
135 #define DWARF_ROUND(SIZE,BOUNDARY) \
136 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
138 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
139 #ifdef STACK_GROWS_DOWNWARD
140 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
142 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
145 /* A pointer to the base of a table that contains frame description
146 information for each routine. */
147 static dw_fde_ref fde_table
;
149 /* Number of elements currently allocated for fde_table. */
150 static unsigned fde_table_allocated
;
152 /* Number of elements in fde_table currently in use. */
153 static unsigned fde_table_in_use
;
155 /* Size (in elements) of increments by which we may expand the
157 #define FDE_TABLE_INCREMENT 256
159 /* A list of call frame insns for the CIE. */
160 static dw_cfi_ref cie_cfi_head
;
162 /* The number of the current function definition for which debugging
163 information is being generated. These numbers range from 1 up to the
164 maximum number of function definitions contained within the current
165 compilation unit. These numbers are used to create unique label id's
166 unique to each function definition. */
167 static unsigned current_funcdef_number
= 0;
169 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
170 attribute that accelerates the lookup of the FDE associated
171 with the subprogram. This variable holds the table index of the FDE
172 associated with the current function (body) definition. */
173 static unsigned current_funcdef_fde
;
175 /* Forward declarations for functions defined in this file. */
177 static char *stripattributes
PROTO((char *));
178 static char *dwarf_cfi_name
PROTO((unsigned));
179 static dw_cfi_ref new_cfi
PROTO((void));
180 static void add_cfi
PROTO((dw_cfi_ref
*, dw_cfi_ref
));
181 static unsigned long size_of_uleb128
PROTO((unsigned long));
182 static unsigned long size_of_sleb128
PROTO((long));
183 static void output_uleb128
PROTO((unsigned long));
184 static void output_sleb128
PROTO((long));
185 static void add_fde_cfi
PROTO((char *, dw_cfi_ref
));
186 static void lookup_cfa_1
PROTO((dw_cfi_ref
, unsigned long *,
188 static void lookup_cfa
PROTO((unsigned long *, long *));
189 static void reg_save
PROTO((char *, unsigned, unsigned,
191 static void initial_return_save
PROTO((rtx
));
192 static void output_cfi
PROTO((dw_cfi_ref
, dw_fde_ref
));
193 static void output_call_frame_info
PROTO((int));
194 static unsigned reg_number
PROTO((rtx
));
196 /* Definitions of defaults for assembler-dependent names of various
197 pseudo-ops and section names.
198 Theses may be overridden in the tm.h file (if necessary) for a particular
201 #ifdef OBJECT_FORMAT_ELF
202 #ifndef UNALIGNED_SHORT_ASM_OP
203 #define UNALIGNED_SHORT_ASM_OP ".2byte"
205 #ifndef UNALIGNED_INT_ASM_OP
206 #define UNALIGNED_INT_ASM_OP ".4byte"
208 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
209 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
211 #endif /* OBJECT_FORMAT_ELF */
214 #define ASM_BYTE_OP ".byte"
217 /* Data and reference forms for relocatable data. */
218 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
219 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
221 /* Pseudo-op for defining a new section. */
222 #ifndef SECTION_ASM_OP
223 #define SECTION_ASM_OP ".section"
226 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
227 print the SECTION_ASM_OP and the section name. The default here works for
228 almost all svr4 assemblers, except for the sparc, where the section name
229 must be enclosed in double quotes. (See sparcv4.h). */
230 #ifndef SECTION_FORMAT
231 #ifdef PUSHSECTION_FORMAT
232 #define SECTION_FORMAT PUSHSECTION_FORMAT
234 #define SECTION_FORMAT "\t%s\t%s\n"
238 #ifndef FRAME_SECTION
239 #define FRAME_SECTION ".debug_frame"
242 #ifndef FUNC_BEGIN_LABEL
243 #define FUNC_BEGIN_LABEL "LFB"
245 #ifndef FUNC_END_LABEL
246 #define FUNC_END_LABEL "LFE"
248 #define CIE_AFTER_SIZE_LABEL "LSCIE"
249 #define CIE_END_LABEL "LECIE"
250 #define CIE_LENGTH_LABEL "LLCIE"
251 #define FDE_AFTER_SIZE_LABEL "LSFDE"
252 #define FDE_END_LABEL "LEFDE"
253 #define FDE_LENGTH_LABEL "LLFDE"
255 /* Definitions of defaults for various types of primitive assembly language
256 output operations. These may be overridden from within the tm.h file,
257 but typically, that is unecessary. */
259 #ifndef ASM_OUTPUT_SECTION
260 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
261 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
264 #ifndef ASM_OUTPUT_DWARF_DATA1
265 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
266 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, VALUE)
269 #ifndef ASM_OUTPUT_DWARF_DELTA1
270 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
271 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
272 assemble_name (FILE, LABEL1); \
273 fprintf (FILE, "-"); \
274 assemble_name (FILE, LABEL2); \
278 #ifdef UNALIGNED_INT_ASM_OP
280 #ifndef UNALIGNED_OFFSET_ASM_OP
281 #define UNALIGNED_OFFSET_ASM_OP \
282 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
285 #ifndef UNALIGNED_WORD_ASM_OP
286 #define UNALIGNED_WORD_ASM_OP \
287 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
290 #ifndef ASM_OUTPUT_DWARF_DELTA2
291 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
292 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
293 assemble_name (FILE, LABEL1); \
294 fprintf (FILE, "-"); \
295 assemble_name (FILE, LABEL2); \
299 #ifndef ASM_OUTPUT_DWARF_DELTA4
300 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
301 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
302 assemble_name (FILE, LABEL1); \
303 fprintf (FILE, "-"); \
304 assemble_name (FILE, LABEL2); \
308 #ifndef ASM_OUTPUT_DWARF_DELTA
309 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
310 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
311 assemble_name (FILE, LABEL1); \
312 fprintf (FILE, "-"); \
313 assemble_name (FILE, LABEL2); \
317 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
318 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
319 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
320 assemble_name (FILE, LABEL1); \
321 fprintf (FILE, "-"); \
322 assemble_name (FILE, LABEL2); \
326 #ifndef ASM_OUTPUT_DWARF_ADDR
327 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
328 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
329 assemble_name (FILE, LABEL); \
333 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
334 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
335 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
338 #ifndef ASM_OUTPUT_DWARF_OFFSET4
339 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
340 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
341 assemble_name (FILE, LABEL); \
345 #ifndef ASM_OUTPUT_DWARF_OFFSET
346 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
347 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
348 assemble_name (FILE, LABEL); \
352 #ifndef ASM_OUTPUT_DWARF_DATA2
353 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
354 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) VALUE)
357 #ifndef ASM_OUTPUT_DWARF_DATA4
358 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
359 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) VALUE)
362 #ifndef ASM_OUTPUT_DWARF_DATA
363 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
364 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
365 (unsigned long) VALUE)
368 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
369 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
370 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
371 (unsigned long) VALUE)
374 #ifndef ASM_OUTPUT_DWARF_DATA8
375 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
377 if (WORDS_BIG_ENDIAN) \
379 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
380 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
384 fprintf ((FILE), "\t%s\t0x%x\n", UNALIGNED_INT_ASM_OP, LOW_VALUE);\
385 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, HIGH_VALUE); \
390 #else /* UNALIGNED_INT_ASM_OP */
392 /* We don't have unaligned support, let's hope the normal output works for
395 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
396 assemble_integer (gen_rtx (SYMBOL_REF, Pmode, LABEL), PTR_SIZE, 1)
398 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
399 assemble_integer (gen_rtx (SYMBOL_REF, SImode, LABEL), 4, 1)
401 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
402 assemble_integer (gen_rtx (SYMBOL_REF, SImode, LABEL), 4, 1)
404 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
405 assemble_integer (gen_rtx (MINUS, HImode, \
406 gen_rtx (SYMBOL_REF, Pmode, LABEL1), \
407 gen_rtx (SYMBOL_REF, Pmode, LABEL2)), \
410 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
411 assemble_integer (gen_rtx (MINUS, SImode, \
412 gen_rtx (SYMBOL_REF, Pmode, LABEL1), \
413 gen_rtx (SYMBOL_REF, Pmode, LABEL2)), \
416 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
417 assemble_integer (gen_rtx (MINUS, Pmode, \
418 gen_rtx (SYMBOL_REF, Pmode, LABEL1), \
419 gen_rtx (SYMBOL_REF, Pmode, LABEL2)), \
422 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
423 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
425 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
426 assemble_integer (GEN_INT (VALUE), 4, 1)
428 #endif /* UNALIGNED_INT_ASM_OP */
431 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
432 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
434 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
435 assemble_name (FILE, SY); \
437 assemble_name (FILE, HI); \
439 assemble_name (FILE, LO); \
442 #endif /* SET_ASM_OP */
444 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
445 newline is produced. When flag_debug_asm is asserted, we add commentary
446 at the end of the line, so we must avoid output of a newline here. */
447 #ifndef ASM_OUTPUT_DWARF_STRING
448 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
450 register int slen = strlen(P); \
451 register char *p = (P); \
453 fprintf (FILE, "\t.ascii \""); \
454 for (i = 0; i < slen; i++) \
456 register int c = p[i]; \
457 if (c == '\"' || c == '\\') \
459 if (c >= ' ' && c < 0177) \
463 fprintf (FILE, "\\%o", c); \
466 fprintf (FILE, "\\0\""); \
471 /* The DWARF 2 CFA column which tracks the return address. Normally this
472 is the column for PC, or the first column after all of the hard
474 #ifndef DWARF_FRAME_RETURN_COLUMN
476 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
478 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
482 /* The mapping from gcc register number to DWARF 2 CFA column number. By
483 default, we just provide columns for all registers. */
484 #ifndef DWARF_FRAME_REGNUM
485 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
488 /* Hook used by __throw. */
491 expand_builtin_dwarf_fp_regnum ()
493 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM
));
496 /* The offset from the incoming value of %sp to the top of the stack frame
497 for the current function. */
498 #ifndef INCOMING_FRAME_SP_OFFSET
499 #define INCOMING_FRAME_SP_OFFSET 0
502 /* Return a pointer to a copy of the section string name S with all
503 attributes stripped off. */
509 char *stripped
= xstrdup (s
);
512 while (*p
&& *p
!= ',')
519 /* Return the register number described by a given RTL node. */
525 register unsigned regno
= REGNO (rtl
);
527 if (regno
>= FIRST_PSEUDO_REGISTER
)
529 warning ("internal regno botch: regno = %d\n", regno
);
533 regno
= DBX_REGISTER_NUMBER (regno
);
537 struct reg_size_range
544 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
545 We do this in kind of a roundabout way, by building up a list of
546 register size ranges and seeing where our register falls in one of those
547 ranges. We need to do it this way because REG_TREE is not a constant,
548 and the target macros were not designed to make this task easy. */
551 expand_builtin_dwarf_reg_size (reg_tree
, target
)
555 enum machine_mode mode
;
557 struct reg_size_range ranges
[5];
564 for (; i
< FIRST_PSEUDO_REGISTER
; ++i
)
566 /* The return address is out of order on the MIPS, and we don't use
567 copy_reg for it anyway, so we don't care here how large it is. */
568 if (DWARF_FRAME_REGNUM (i
) == DWARF_FRAME_RETURN_COLUMN
)
571 mode
= reg_raw_mode
[i
];
572 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
573 to use the same size as word_mode, since that reduces the number
574 of ranges we need. It should not matter, since the result should
575 never be used for a condition code register anyways. */
578 size
= GET_MODE_SIZE (mode
);
580 if (size
!= last_size
)
582 ranges
[n_ranges
].beg
= i
;
583 ranges
[n_ranges
].size
= last_size
= GET_MODE_SIZE (reg_raw_mode
[i
]);
588 ranges
[n_ranges
-1].end
= i
;
591 /* The usual case: fp regs surrounded by general regs. */
592 if (n_ranges
== 3 && ranges
[0].size
== ranges
[2].size
)
594 if ((DWARF_FRAME_REGNUM (ranges
[1].end
)
595 - DWARF_FRAME_REGNUM (ranges
[1].beg
))
596 != ranges
[1].end
- ranges
[1].beg
)
598 t
= fold (build (GE_EXPR
, integer_type_node
, reg_tree
,
599 build_int_2 (DWARF_FRAME_REGNUM (ranges
[1].beg
), 0)));
600 t2
= fold (build (LE_EXPR
, integer_type_node
, reg_tree
,
601 build_int_2 (DWARF_FRAME_REGNUM (ranges
[1].end
), 0)));
602 t
= fold (build (TRUTH_ANDIF_EXPR
, integer_type_node
, t
, t2
));
603 t
= fold (build (COND_EXPR
, integer_type_node
, t
,
604 build_int_2 (ranges
[1].size
, 0),
605 build_int_2 (ranges
[0].size
, 0)));
610 t
= build_int_2 (ranges
[n_ranges
].size
, 0);
611 size
= DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
);
614 if ((DWARF_FRAME_REGNUM (ranges
[n_ranges
].end
)
615 - DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
))
616 != ranges
[n_ranges
].end
- ranges
[n_ranges
].beg
)
618 if (DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
) >= size
)
620 size
= DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
);
621 t2
= fold (build (LE_EXPR
, integer_type_node
, reg_tree
,
622 build_int_2 (DWARF_FRAME_REGNUM
623 (ranges
[n_ranges
].end
), 0)));
624 t
= fold (build (COND_EXPR
, integer_type_node
, t2
,
625 build_int_2 (ranges
[n_ranges
].size
, 0), t
));
628 return expand_expr (t
, target
, Pmode
, 0);
631 /* Convert a DWARF call frame info. operation to its string name */
634 dwarf_cfi_name (cfi_opc
)
635 register unsigned cfi_opc
;
639 case DW_CFA_advance_loc
:
640 return "DW_CFA_advance_loc";
642 return "DW_CFA_offset";
644 return "DW_CFA_restore";
648 return "DW_CFA_set_loc";
649 case DW_CFA_advance_loc1
:
650 return "DW_CFA_advance_loc1";
651 case DW_CFA_advance_loc2
:
652 return "DW_CFA_advance_loc2";
653 case DW_CFA_advance_loc4
:
654 return "DW_CFA_advance_loc4";
655 case DW_CFA_offset_extended
:
656 return "DW_CFA_offset_extended";
657 case DW_CFA_restore_extended
:
658 return "DW_CFA_restore_extended";
659 case DW_CFA_undefined
:
660 return "DW_CFA_undefined";
661 case DW_CFA_same_value
:
662 return "DW_CFA_same_value";
663 case DW_CFA_register
:
664 return "DW_CFA_register";
665 case DW_CFA_remember_state
:
666 return "DW_CFA_remember_state";
667 case DW_CFA_restore_state
:
668 return "DW_CFA_restore_state";
670 return "DW_CFA_def_cfa";
671 case DW_CFA_def_cfa_register
:
672 return "DW_CFA_def_cfa_register";
673 case DW_CFA_def_cfa_offset
:
674 return "DW_CFA_def_cfa_offset";
676 /* SGI/MIPS specific */
677 case DW_CFA_MIPS_advance_loc8
:
678 return "DW_CFA_MIPS_advance_loc8";
681 case DW_CFA_GNU_window_save
:
682 return "DW_CFA_GNU_window_save";
683 case DW_CFA_GNU_args_size
:
684 return "DW_CFA_GNU_args_size";
687 return "DW_CFA_<unknown>";
691 /* Return a pointer to a newly allocated Call Frame Instruction. */
693 static inline dw_cfi_ref
696 register dw_cfi_ref cfi
= (dw_cfi_ref
) xmalloc (sizeof (dw_cfi_node
));
698 cfi
->dw_cfi_next
= NULL
;
699 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= 0;
700 cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
= 0;
705 /* Add a Call Frame Instruction to list of instructions. */
708 add_cfi (list_head
, cfi
)
709 register dw_cfi_ref
*list_head
;
710 register dw_cfi_ref cfi
;
712 register dw_cfi_ref
*p
;
714 /* Find the end of the chain. */
715 for (p
= list_head
; (*p
) != NULL
; p
= &(*p
)->dw_cfi_next
)
721 /* Generate a new label for the CFI info to refer to. */
724 dwarf2out_cfi_label ()
726 static char label
[20];
727 static unsigned long label_num
= 0;
729 ASM_GENERATE_INTERNAL_LABEL (label
, "LCFI", label_num
++);
730 ASM_OUTPUT_LABEL (asm_out_file
, label
);
735 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
736 or to the CIE if LABEL is NULL. */
739 add_fde_cfi (label
, cfi
)
740 register char *label
;
741 register dw_cfi_ref cfi
;
745 register dw_fde_ref fde
= &fde_table
[fde_table_in_use
- 1];
748 label
= dwarf2out_cfi_label ();
750 if (fde
->dw_fde_current_label
== NULL
751 || strcmp (label
, fde
->dw_fde_current_label
) != 0)
753 register dw_cfi_ref xcfi
;
755 fde
->dw_fde_current_label
= label
= xstrdup (label
);
757 /* Set the location counter to the new label. */
759 xcfi
->dw_cfi_opc
= DW_CFA_advance_loc4
;
760 xcfi
->dw_cfi_oprnd1
.dw_cfi_addr
= label
;
761 add_cfi (&fde
->dw_fde_cfi
, xcfi
);
764 add_cfi (&fde
->dw_fde_cfi
, cfi
);
768 add_cfi (&cie_cfi_head
, cfi
);
771 /* Subroutine of lookup_cfa. */
774 lookup_cfa_1 (cfi
, regp
, offsetp
)
775 register dw_cfi_ref cfi
;
776 register unsigned long *regp
;
777 register long *offsetp
;
779 switch (cfi
->dw_cfi_opc
)
781 case DW_CFA_def_cfa_offset
:
782 *offsetp
= cfi
->dw_cfi_oprnd1
.dw_cfi_offset
;
784 case DW_CFA_def_cfa_register
:
785 *regp
= cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
;
788 *regp
= cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
;
789 *offsetp
= cfi
->dw_cfi_oprnd2
.dw_cfi_offset
;
796 /* Find the previous value for the CFA. */
799 lookup_cfa (regp
, offsetp
)
800 register unsigned long *regp
;
801 register long *offsetp
;
803 register dw_cfi_ref cfi
;
805 *regp
= (unsigned long) -1;
808 for (cfi
= cie_cfi_head
; cfi
; cfi
= cfi
->dw_cfi_next
)
809 lookup_cfa_1 (cfi
, regp
, offsetp
);
811 if (fde_table_in_use
)
813 register dw_fde_ref fde
= &fde_table
[fde_table_in_use
- 1];
814 for (cfi
= fde
->dw_fde_cfi
; cfi
; cfi
= cfi
->dw_cfi_next
)
815 lookup_cfa_1 (cfi
, regp
, offsetp
);
819 /* The current rule for calculating the DWARF2 canonical frame address. */
820 static unsigned long cfa_reg
;
821 static long cfa_offset
;
823 /* The register used for saving registers to the stack, and its offset
825 static unsigned cfa_store_reg
;
826 static long cfa_store_offset
;
828 /* The running total of the size of arguments pushed onto the stack. */
829 static long args_size
;
831 /* Entry point to update the canonical frame address (CFA).
832 LABEL is passed to add_fde_cfi. The value of CFA is now to be
833 calculated from REG+OFFSET. */
836 dwarf2out_def_cfa (label
, reg
, offset
)
837 register char *label
;
838 register unsigned reg
;
839 register long offset
;
841 register dw_cfi_ref cfi
;
842 unsigned long old_reg
;
847 if (cfa_store_reg
== reg
)
848 cfa_store_offset
= offset
;
850 reg
= DWARF_FRAME_REGNUM (reg
);
851 lookup_cfa (&old_reg
, &old_offset
);
853 if (reg
== old_reg
&& offset
== old_offset
)
860 cfi
->dw_cfi_opc
= DW_CFA_def_cfa_offset
;
861 cfi
->dw_cfi_oprnd1
.dw_cfi_offset
= offset
;
864 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
865 else if (offset
== old_offset
&& old_reg
!= (unsigned long) -1)
867 cfi
->dw_cfi_opc
= DW_CFA_def_cfa_register
;
868 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
874 cfi
->dw_cfi_opc
= DW_CFA_def_cfa
;
875 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
876 cfi
->dw_cfi_oprnd2
.dw_cfi_offset
= offset
;
879 add_fde_cfi (label
, cfi
);
882 /* Add the CFI for saving a register. REG is the CFA column number.
883 LABEL is passed to add_fde_cfi.
884 If SREG is -1, the register is saved at OFFSET from the CFA;
885 otherwise it is saved in SREG. */
888 reg_save (label
, reg
, sreg
, offset
)
889 register char * label
;
890 register unsigned reg
;
891 register unsigned sreg
;
892 register long offset
;
894 register dw_cfi_ref cfi
= new_cfi ();
896 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
901 /* The register number won't fit in 6 bits, so we have to use
903 cfi
->dw_cfi_opc
= DW_CFA_offset_extended
;
905 cfi
->dw_cfi_opc
= DW_CFA_offset
;
907 offset
/= DWARF_CIE_DATA_ALIGNMENT
;
910 cfi
->dw_cfi_oprnd2
.dw_cfi_offset
= offset
;
914 cfi
->dw_cfi_opc
= DW_CFA_register
;
915 cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
= sreg
;
918 add_fde_cfi (label
, cfi
);
921 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
922 This CFI tells the unwinder that it needs to restore the window registers
923 from the previous frame's window save area.
925 ??? Perhaps we should note in the CIE where windows are saved (instead of
926 assuming 0(cfa)) and what registers are in the window. */
929 dwarf2out_window_save (label
)
930 register char * label
;
932 register dw_cfi_ref cfi
= new_cfi ();
933 cfi
->dw_cfi_opc
= DW_CFA_GNU_window_save
;
934 add_fde_cfi (label
, cfi
);
937 /* Add a CFI to update the running total of the size of arguments
938 pushed onto the stack. */
941 dwarf2out_args_size (label
, size
)
945 register dw_cfi_ref cfi
= new_cfi ();
946 cfi
->dw_cfi_opc
= DW_CFA_GNU_args_size
;
947 cfi
->dw_cfi_oprnd1
.dw_cfi_offset
= size
;
948 add_fde_cfi (label
, cfi
);
951 /* Entry point for saving a register to the stack. REG is the GCC register
952 number. LABEL and OFFSET are passed to reg_save. */
955 dwarf2out_reg_save (label
, reg
, offset
)
956 register char * label
;
957 register unsigned reg
;
958 register long offset
;
960 reg_save (label
, DWARF_FRAME_REGNUM (reg
), -1, offset
);
963 /* Entry point for saving the return address in the stack.
964 LABEL and OFFSET are passed to reg_save. */
967 dwarf2out_return_save (label
, offset
)
968 register char * label
;
969 register long offset
;
971 reg_save (label
, DWARF_FRAME_RETURN_COLUMN
, -1, offset
);
974 /* Entry point for saving the return address in a register.
975 LABEL and SREG are passed to reg_save. */
978 dwarf2out_return_reg (label
, sreg
)
979 register char * label
;
980 register unsigned sreg
;
982 reg_save (label
, DWARF_FRAME_RETURN_COLUMN
, sreg
, 0);
985 /* Record the initial position of the return address. RTL is
986 INCOMING_RETURN_ADDR_RTX. */
989 initial_return_save (rtl
)
995 switch (GET_CODE (rtl
))
998 /* RA is in a register. */
999 reg
= reg_number (rtl
);
1002 /* RA is on the stack. */
1003 rtl
= XEXP (rtl
, 0);
1004 switch (GET_CODE (rtl
))
1007 if (REGNO (rtl
) != STACK_POINTER_REGNUM
)
1012 if (REGNO (XEXP (rtl
, 0)) != STACK_POINTER_REGNUM
)
1014 offset
= INTVAL (XEXP (rtl
, 1));
1017 if (REGNO (XEXP (rtl
, 0)) != STACK_POINTER_REGNUM
)
1019 offset
= -INTVAL (XEXP (rtl
, 1));
1026 /* The return address is at some offset from any value we can
1027 actually load. For instance, on the SPARC it is in %i7+8. Just
1028 ignore the offset for now; it doesn't matter for unwinding frames. */
1029 if (GET_CODE (XEXP (rtl
, 1)) != CONST_INT
)
1031 initial_return_save (XEXP (rtl
, 0));
1037 reg_save (NULL
, DWARF_FRAME_RETURN_COLUMN
, reg
, offset
- cfa_offset
);
1040 /* Check INSN to see if it looks like a push or a stack adjustment, and
1041 make a note of it if it does. EH uses this information to find out how
1042 much extra space it needs to pop off the stack. */
1045 dwarf2out_stack_adjust (insn
)
1051 if (GET_CODE (insn
) == BARRIER
)
1053 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1054 the compiler will have already emitted a stack adjustment, but
1055 doesn't bother for calls to noreturn functions. */
1056 #ifdef STACK_GROWS_DOWNWARD
1057 offset
= -args_size
;
1062 else if (GET_CODE (PATTERN (insn
)) == SET
)
1067 insn
= PATTERN (insn
);
1068 src
= SET_SRC (insn
);
1069 dest
= SET_DEST (insn
);
1071 if (dest
== stack_pointer_rtx
)
1073 /* (set (reg sp) (plus (reg sp) (const_int))) */
1074 code
= GET_CODE (src
);
1075 if (! (code
== PLUS
|| code
== MINUS
)
1076 || XEXP (src
, 0) != stack_pointer_rtx
1077 || GET_CODE (XEXP (src
, 1)) != CONST_INT
)
1080 offset
= INTVAL (XEXP (src
, 1));
1082 else if (GET_CODE (dest
) == MEM
)
1084 /* (set (mem (pre_dec (reg sp))) (foo)) */
1085 src
= XEXP (dest
, 0);
1086 code
= GET_CODE (src
);
1088 if (! (code
== PRE_DEC
|| code
== PRE_INC
)
1089 || XEXP (src
, 0) != stack_pointer_rtx
)
1092 offset
= GET_MODE_SIZE (GET_MODE (dest
));
1097 if (code
== PLUS
|| code
== PRE_INC
)
1106 if (cfa_reg
== STACK_POINTER_REGNUM
)
1107 cfa_offset
+= offset
;
1109 #ifndef STACK_GROWS_DOWNWARD
1112 args_size
+= offset
;
1116 label
= dwarf2out_cfi_label ();
1117 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1118 dwarf2out_args_size (label
, args_size
);
1121 /* Record call frame debugging information for INSN, which either
1122 sets SP or FP (adjusting how we calculate the frame address) or saves a
1123 register to the stack. If INSN is NULL_RTX, initialize our state. */
1126 dwarf2out_frame_debug (insn
)
1133 /* A temporary register used in adjusting SP or setting up the store_reg. */
1134 static unsigned cfa_temp_reg
;
1135 static long cfa_temp_value
;
1137 if (insn
== NULL_RTX
)
1139 /* Set up state for generating call frame debug info. */
1140 lookup_cfa (&cfa_reg
, &cfa_offset
);
1141 if (cfa_reg
!= DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM
))
1143 cfa_reg
= STACK_POINTER_REGNUM
;
1144 cfa_store_reg
= cfa_reg
;
1145 cfa_store_offset
= cfa_offset
;
1151 if (! RTX_FRAME_RELATED_P (insn
))
1153 dwarf2out_stack_adjust (insn
);
1157 label
= dwarf2out_cfi_label ();
1159 insn
= PATTERN (insn
);
1160 /* Assume that in a PARALLEL prologue insn, only the first elt is
1161 significant. Currently this is true. */
1162 if (GET_CODE (insn
) == PARALLEL
)
1163 insn
= XVECEXP (insn
, 0, 0);
1164 if (GET_CODE (insn
) != SET
)
1167 src
= SET_SRC (insn
);
1168 dest
= SET_DEST (insn
);
1170 switch (GET_CODE (dest
))
1173 /* Update the CFA rule wrt SP or FP. Make sure src is
1174 relative to the current CFA register. */
1175 switch (GET_CODE (src
))
1177 /* Setting FP from SP. */
1179 if (cfa_reg
!= REGNO (src
))
1181 if (REGNO (dest
) != STACK_POINTER_REGNUM
1182 && !(frame_pointer_needed
1183 && REGNO (dest
) == HARD_FRAME_POINTER_REGNUM
))
1185 cfa_reg
= REGNO (dest
);
1190 if (dest
== stack_pointer_rtx
)
1193 switch (GET_CODE (XEXP (src
, 1)))
1196 offset
= INTVAL (XEXP (src
, 1));
1199 if (REGNO (XEXP (src
, 1)) != cfa_temp_reg
)
1201 offset
= cfa_temp_value
;
1207 if (XEXP (src
, 0) == hard_frame_pointer_rtx
)
1209 /* Restoring SP from FP in the epilogue. */
1210 if (cfa_reg
!= HARD_FRAME_POINTER_REGNUM
)
1212 cfa_reg
= STACK_POINTER_REGNUM
;
1214 else if (XEXP (src
, 0) != stack_pointer_rtx
)
1217 if (GET_CODE (src
) == PLUS
)
1219 if (cfa_reg
== STACK_POINTER_REGNUM
)
1220 cfa_offset
+= offset
;
1221 if (cfa_store_reg
== STACK_POINTER_REGNUM
)
1222 cfa_store_offset
+= offset
;
1226 if (GET_CODE (src
) != PLUS
1227 || XEXP (src
, 1) != stack_pointer_rtx
)
1229 if (GET_CODE (XEXP (src
, 0)) != REG
1230 || REGNO (XEXP (src
, 0)) != cfa_temp_reg
)
1232 if (cfa_reg
!= STACK_POINTER_REGNUM
)
1234 cfa_store_reg
= REGNO (dest
);
1235 cfa_store_offset
= cfa_offset
- cfa_temp_value
;
1240 cfa_temp_reg
= REGNO (dest
);
1241 cfa_temp_value
= INTVAL (src
);
1245 if (GET_CODE (XEXP (src
, 0)) != REG
1246 || REGNO (XEXP (src
, 0)) != cfa_temp_reg
1247 || REGNO (dest
) != cfa_temp_reg
1248 || GET_CODE (XEXP (src
, 1)) != CONST_INT
)
1250 cfa_temp_value
|= INTVAL (XEXP (src
, 1));
1256 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1260 /* Saving a register to the stack. Make sure dest is relative to the
1262 if (GET_CODE (src
) != REG
)
1264 switch (GET_CODE (XEXP (dest
, 0)))
1269 offset
= GET_MODE_SIZE (GET_MODE (dest
));
1270 if (GET_CODE (XEXP (dest
, 0)) == PRE_INC
)
1273 if (REGNO (XEXP (XEXP (dest
, 0), 0)) != STACK_POINTER_REGNUM
1274 || cfa_store_reg
!= STACK_POINTER_REGNUM
)
1276 cfa_store_offset
+= offset
;
1277 if (cfa_reg
== STACK_POINTER_REGNUM
)
1278 cfa_offset
= cfa_store_offset
;
1280 offset
= -cfa_store_offset
;
1283 /* With an offset. */
1286 offset
= INTVAL (XEXP (XEXP (dest
, 0), 1));
1287 if (GET_CODE (src
) == MINUS
)
1290 if (cfa_store_reg
!= REGNO (XEXP (XEXP (dest
, 0), 0)))
1292 offset
-= cfa_store_offset
;
1298 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1299 dwarf2out_reg_save (label
, REGNO (src
), offset
);
1307 /* Return the size of an unsigned LEB128 quantity. */
1309 static inline unsigned long
1310 size_of_uleb128 (value
)
1311 register unsigned long value
;
1313 register unsigned long size
= 0;
1314 register unsigned byte
;
1318 byte
= (value
& 0x7f);
1327 /* Return the size of a signed LEB128 quantity. */
1329 static inline unsigned long
1330 size_of_sleb128 (value
)
1331 register long value
;
1333 register unsigned long size
= 0;
1334 register unsigned byte
;
1338 byte
= (value
& 0x7f);
1342 while (!(((value
== 0) && ((byte
& 0x40) == 0))
1343 || ((value
== -1) && ((byte
& 0x40) != 0))));
1348 /* Output an unsigned LEB128 quantity. */
1351 output_uleb128 (value
)
1352 register unsigned long value
;
1354 unsigned long save_value
= value
;
1356 fprintf (asm_out_file
, "\t%s\t", ASM_BYTE_OP
);
1359 register unsigned byte
= (value
& 0x7f);
1362 /* More bytes to follow. */
1365 fprintf (asm_out_file
, "0x%x", byte
);
1367 fprintf (asm_out_file
, ",");
1372 fprintf (asm_out_file
, "\t%s ULEB128 0x%x", ASM_COMMENT_START
, save_value
);
1375 /* Output an signed LEB128 quantity. */
1378 output_sleb128 (value
)
1379 register long value
;
1382 register unsigned byte
;
1383 long save_value
= value
;
1385 fprintf (asm_out_file
, "\t%s\t", ASM_BYTE_OP
);
1388 byte
= (value
& 0x7f);
1389 /* arithmetic shift */
1391 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
1392 || ((value
== -1) && ((byte
& 0x40) != 0))));
1396 fprintf (asm_out_file
, "0x%x", byte
);
1398 fprintf (asm_out_file
, ",");
1403 fprintf (asm_out_file
, "\t%s SLEB128 %d", ASM_COMMENT_START
, save_value
);
1406 /* Output a Call Frame Information opcode and its operand(s). */
1409 output_cfi (cfi
, fde
)
1410 register dw_cfi_ref cfi
;
1411 register dw_fde_ref fde
;
1413 if (cfi
->dw_cfi_opc
== DW_CFA_advance_loc
)
1415 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1417 | (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
& 0x3f));
1419 fprintf (asm_out_file
, "\t%s DW_CFA_advance_loc 0x%x",
1420 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1421 fputc ('\n', asm_out_file
);
1424 else if (cfi
->dw_cfi_opc
== DW_CFA_offset
)
1426 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1428 | (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
& 0x3f));
1430 fprintf (asm_out_file
, "\t%s DW_CFA_offset, column 0x%x",
1431 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1433 fputc ('\n', asm_out_file
);
1434 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_offset
);
1435 fputc ('\n', asm_out_file
);
1437 else if (cfi
->dw_cfi_opc
== DW_CFA_restore
)
1439 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1441 | (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
& 0x3f));
1443 fprintf (asm_out_file
, "\t%s DW_CFA_restore, column 0x%x",
1444 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1446 fputc ('\n', asm_out_file
);
1450 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, cfi
->dw_cfi_opc
);
1452 fprintf (asm_out_file
, "\t%s %s", ASM_COMMENT_START
,
1453 dwarf_cfi_name (cfi
->dw_cfi_opc
));
1455 fputc ('\n', asm_out_file
);
1456 switch (cfi
->dw_cfi_opc
)
1458 case DW_CFA_set_loc
:
1459 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, cfi
->dw_cfi_oprnd1
.dw_cfi_addr
);
1460 fputc ('\n', asm_out_file
);
1462 case DW_CFA_advance_loc1
:
1463 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file
,
1464 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1465 fde
->dw_fde_current_label
);
1466 fputc ('\n', asm_out_file
);
1467 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1469 case DW_CFA_advance_loc2
:
1470 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
,
1471 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1472 fde
->dw_fde_current_label
);
1473 fputc ('\n', asm_out_file
);
1474 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1476 case DW_CFA_advance_loc4
:
1477 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
,
1478 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1479 fde
->dw_fde_current_label
);
1480 fputc ('\n', asm_out_file
);
1481 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1483 #ifdef MIPS_DEBUGGING_INFO
1484 case DW_CFA_MIPS_advance_loc8
:
1485 /* TODO: not currently implemented. */
1489 case DW_CFA_offset_extended
:
1490 case DW_CFA_def_cfa
:
1491 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1492 fputc ('\n', asm_out_file
);
1493 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_offset
);
1494 fputc ('\n', asm_out_file
);
1496 case DW_CFA_restore_extended
:
1497 case DW_CFA_undefined
:
1498 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1499 fputc ('\n', asm_out_file
);
1501 case DW_CFA_same_value
:
1502 case DW_CFA_def_cfa_register
:
1503 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1504 fputc ('\n', asm_out_file
);
1506 case DW_CFA_register
:
1507 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1508 fputc ('\n', asm_out_file
);
1509 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
);
1510 fputc ('\n', asm_out_file
);
1512 case DW_CFA_def_cfa_offset
:
1513 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1514 fputc ('\n', asm_out_file
);
1516 case DW_CFA_GNU_window_save
:
1518 case DW_CFA_GNU_args_size
:
1519 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1520 fputc ('\n', asm_out_file
);
1528 #if !defined (EH_FRAME_SECTION)
1529 #if defined (EH_FRAME_SECTION_ASM_OP)
1530 #define EH_FRAME_SECTION() eh_frame_section();
1532 #if defined (ASM_OUTPUT_SECTION_NAME)
1533 #define EH_FRAME_SECTION() \
1535 named_section (NULL_TREE, ".eh_frame", 0); \
1541 /* Output the call frame information used to used to record information
1542 that relates to calculating the frame pointer, and records the
1543 location of saved registers. */
1546 output_call_frame_info (for_eh
)
1549 register unsigned long i
, j
;
1550 register dw_fde_ref fde
;
1551 register unsigned long fde_size
;
1552 register dw_cfi_ref cfi
;
1553 unsigned long fde_pad
;
1554 char l1
[20], l2
[20];
1555 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1559 /* Do we want to include a pointer to the exception table? */
1560 int eh_ptr
= for_eh
&& exception_table_p ();
1562 fputc ('\n', asm_out_file
);
1564 /* We're going to be generating comments, so turn on app. */
1570 #ifdef EH_FRAME_SECTION
1571 EH_FRAME_SECTION ();
1573 tree label
= get_file_function_name ('F');
1576 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1577 ASM_GLOBALIZE_LABEL (asm_out_file
, IDENTIFIER_POINTER (label
));
1578 ASM_OUTPUT_LABEL (asm_out_file
, IDENTIFIER_POINTER (label
));
1580 assemble_label ("__FRAME_BEGIN__");
1583 ASM_OUTPUT_SECTION (asm_out_file
, FRAME_SECTION
);
1585 /* Output the CIE. */
1586 ASM_GENERATE_INTERNAL_LABEL (l1
, CIE_AFTER_SIZE_LABEL
, for_eh
);
1587 ASM_GENERATE_INTERNAL_LABEL (l2
, CIE_END_LABEL
, for_eh
);
1588 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1589 ASM_GENERATE_INTERNAL_LABEL (ld
, CIE_LENGTH_LABEL
, for_eh
);
1591 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file
, ld
);
1593 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, ld
);
1596 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l2
, l1
);
1598 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l2
, l1
);
1601 fprintf (asm_out_file
, "\t%s Length of Common Information Entry",
1604 fputc ('\n', asm_out_file
);
1605 ASM_OUTPUT_LABEL (asm_out_file
, l1
);
1608 /* Now that the CIE pointer is PC-relative for EH,
1609 use 0 to identify the CIE. */
1610 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 0);
1612 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, DW_CIE_ID
);
1615 fprintf (asm_out_file
, "\t%s CIE Identifier Tag", ASM_COMMENT_START
);
1617 fputc ('\n', asm_out_file
);
1618 if (! for_eh
&& DWARF_OFFSET_SIZE
== 8)
1620 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, DW_CIE_ID
);
1621 fputc ('\n', asm_out_file
);
1624 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_CIE_VERSION
);
1626 fprintf (asm_out_file
, "\t%s CIE Version", ASM_COMMENT_START
);
1628 fputc ('\n', asm_out_file
);
1631 /* The CIE contains a pointer to the exception region info for the
1632 frame. Make the augmentation string three bytes (including the
1633 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1634 can't handle unaligned relocs. */
1637 ASM_OUTPUT_DWARF_STRING (asm_out_file
, "eh");
1638 fprintf (asm_out_file
, "\t%s CIE Augmentation", ASM_COMMENT_START
);
1642 ASM_OUTPUT_ASCII (asm_out_file
, "eh", 3);
1644 fputc ('\n', asm_out_file
);
1646 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, "__EXCEPTION_TABLE__");
1648 fprintf (asm_out_file
, "\t%s pointer to exception region info",
1653 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
1655 fprintf (asm_out_file
, "\t%s CIE Augmentation (none)",
1659 fputc ('\n', asm_out_file
);
1662 fprintf (asm_out_file
, " (CIE Code Alignment Factor)");
1664 fputc ('\n', asm_out_file
);
1665 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT
);
1667 fprintf (asm_out_file
, " (CIE Data Alignment Factor)");
1669 fputc ('\n', asm_out_file
);
1670 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_FRAME_RETURN_COLUMN
);
1672 fprintf (asm_out_file
, "\t%s CIE RA Column", ASM_COMMENT_START
);
1674 fputc ('\n', asm_out_file
);
1676 for (cfi
= cie_cfi_head
; cfi
!= NULL
; cfi
= cfi
->dw_cfi_next
)
1677 output_cfi (cfi
, NULL
);
1679 /* Pad the CIE out to an address sized boundary. */
1680 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1681 ASM_OUTPUT_LABEL (asm_out_file
, l2
);
1682 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1683 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file
, ld
, l2
, l1
);
1685 fprintf (asm_out_file
, "\t%s CIE Length Symbol", ASM_COMMENT_START
);
1686 fputc ('\n', asm_out_file
);
1689 /* Loop through all of the FDE's. */
1690 for (i
= 0; i
< fde_table_in_use
; ++i
)
1692 fde
= &fde_table
[i
];
1694 ASM_GENERATE_INTERNAL_LABEL (l1
, FDE_AFTER_SIZE_LABEL
, for_eh
+ i
*2);
1695 ASM_GENERATE_INTERNAL_LABEL (l2
, FDE_END_LABEL
, for_eh
+ i
*2);
1696 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1697 ASM_GENERATE_INTERNAL_LABEL (ld
, FDE_LENGTH_LABEL
, for_eh
+ i
*2);
1699 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file
, ld
);
1701 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, ld
);
1704 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l2
, l1
);
1706 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l2
, l1
);
1709 fprintf (asm_out_file
, "\t%s FDE Length", ASM_COMMENT_START
);
1710 fputc ('\n', asm_out_file
);
1711 ASM_OUTPUT_LABEL (asm_out_file
, l1
);
1714 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l1
, "__FRAME_BEGIN__");
1716 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (FRAME_SECTION
));
1718 fprintf (asm_out_file
, "\t%s FDE CIE offset", ASM_COMMENT_START
);
1720 fputc ('\n', asm_out_file
);
1721 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, fde
->dw_fde_begin
);
1723 fprintf (asm_out_file
, "\t%s FDE initial location", ASM_COMMENT_START
);
1725 fputc ('\n', asm_out_file
);
1726 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
,
1727 fde
->dw_fde_end
, fde
->dw_fde_begin
);
1729 fprintf (asm_out_file
, "\t%s FDE address range", ASM_COMMENT_START
);
1731 fputc ('\n', asm_out_file
);
1733 /* Loop through the Call Frame Instructions associated with
1735 fde
->dw_fde_current_label
= fde
->dw_fde_begin
;
1736 for (cfi
= fde
->dw_fde_cfi
; cfi
!= NULL
; cfi
= cfi
->dw_cfi_next
)
1737 output_cfi (cfi
, fde
);
1739 /* Pad the FDE out to an address sized boundary. */
1740 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1741 ASM_OUTPUT_LABEL (asm_out_file
, l2
);
1742 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1743 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file
, ld
, l2
, l1
);
1745 fprintf (asm_out_file
, "\t%s FDE Length Symbol", ASM_COMMENT_START
);
1746 fputc ('\n', asm_out_file
);
1749 #ifndef EH_FRAME_SECTION
1752 /* Emit terminating zero for table. */
1753 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 0);
1754 fputc ('\n', asm_out_file
);
1757 #ifdef MIPS_DEBUGGING_INFO
1758 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1759 get a value of 0. Putting .align 0 after the label fixes it. */
1760 ASM_OUTPUT_ALIGN (asm_out_file
, 0);
1763 /* Turn off app to make assembly quicker. */
1768 /* Output a marker (i.e. a label) for the beginning of a function, before
1772 dwarf2out_begin_prologue ()
1774 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
1775 register dw_fde_ref fde
;
1777 ++current_funcdef_number
;
1779 function_section (current_function_decl
);
1780 ASM_GENERATE_INTERNAL_LABEL (label
, FUNC_BEGIN_LABEL
,
1781 current_funcdef_number
);
1782 ASM_OUTPUT_LABEL (asm_out_file
, label
);
1784 /* Expand the fde table if necessary. */
1785 if (fde_table_in_use
== fde_table_allocated
)
1787 fde_table_allocated
+= FDE_TABLE_INCREMENT
;
1789 = (dw_fde_ref
) xrealloc (fde_table
,
1790 fde_table_allocated
* sizeof (dw_fde_node
));
1793 /* Record the FDE associated with this function. */
1794 current_funcdef_fde
= fde_table_in_use
;
1796 /* Add the new FDE at the end of the fde_table. */
1797 fde
= &fde_table
[fde_table_in_use
++];
1798 fde
->dw_fde_begin
= xstrdup (label
);
1799 fde
->dw_fde_current_label
= NULL
;
1800 fde
->dw_fde_end
= NULL
;
1801 fde
->dw_fde_cfi
= NULL
;
1806 /* Output a marker (i.e. a label) for the absolute end of the generated code
1807 for a function definition. This gets called *after* the epilogue code has
1811 dwarf2out_end_epilogue ()
1814 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
1816 /* Output a label to mark the endpoint of the code generated for this
1818 ASM_GENERATE_INTERNAL_LABEL (label
, FUNC_END_LABEL
, current_funcdef_number
);
1819 ASM_OUTPUT_LABEL (asm_out_file
, label
);
1820 fde
= &fde_table
[fde_table_in_use
- 1];
1821 fde
->dw_fde_end
= xstrdup (label
);
1825 dwarf2out_frame_init ()
1827 /* Allocate the initial hunk of the fde_table. */
1829 = (dw_fde_ref
) xmalloc (FDE_TABLE_INCREMENT
* sizeof (dw_fde_node
));
1830 bzero ((char *) fde_table
, FDE_TABLE_INCREMENT
* sizeof (dw_fde_node
));
1831 fde_table_allocated
= FDE_TABLE_INCREMENT
;
1832 fde_table_in_use
= 0;
1834 /* Generate the CFA instructions common to all FDE's. Do it now for the
1835 sake of lookup_cfa. */
1837 #ifdef DWARF2_UNWIND_INFO
1838 /* On entry, the Canonical Frame Address is at SP. */
1839 dwarf2out_def_cfa (NULL
, STACK_POINTER_REGNUM
, INCOMING_FRAME_SP_OFFSET
);
1840 initial_return_save (INCOMING_RETURN_ADDR_RTX
);
1845 dwarf2out_frame_finish ()
1847 /* Output call frame information. */
1848 #ifdef MIPS_DEBUGGING_INFO
1849 if (write_symbols
== DWARF2_DEBUG
)
1850 output_call_frame_info (0);
1851 if (flag_exceptions
&& ! exceptions_via_longjmp
)
1852 output_call_frame_info (1);
1854 if (write_symbols
== DWARF2_DEBUG
1855 || (flag_exceptions
&& ! exceptions_via_longjmp
))
1856 output_call_frame_info (1);
1860 #endif /* .debug_frame support */
1862 /* And now, the support for symbolic debugging information. */
1863 #ifdef DWARF2_DEBUGGING_INFO
1865 extern char *getpwd ();
1867 /* NOTE: In the comments in this file, many references are made to
1868 "Debugging Information Entries". This term is abbreviated as `DIE'
1869 throughout the remainder of this file. */
1871 /* An internal representation of the DWARF output is built, and then
1872 walked to generate the DWARF debugging info. The walk of the internal
1873 representation is done after the entire program has been compiled.
1874 The types below are used to describe the internal representation. */
1876 /* Each DIE may have a series of attribute/value pairs. Values
1877 can take on several forms. The forms that are used in this
1878 implementation are listed below. */
1885 dw_val_class_unsigned_const
,
1886 dw_val_class_long_long
,
1889 dw_val_class_die_ref
,
1890 dw_val_class_fde_ref
,
1891 dw_val_class_lbl_id
,
1892 dw_val_class_section_offset
,
1897 /* Various DIE's use offsets relative to the beginning of the
1898 .debug_info section to refer to each other. */
1900 typedef long int dw_offset
;
1902 /* Define typedefs here to avoid circular dependencies. */
1904 typedef struct die_struct
*dw_die_ref
;
1905 typedef struct dw_attr_struct
*dw_attr_ref
;
1906 typedef struct dw_val_struct
*dw_val_ref
;
1907 typedef struct dw_line_info_struct
*dw_line_info_ref
;
1908 typedef struct dw_separate_line_info_struct
*dw_separate_line_info_ref
;
1909 typedef struct dw_loc_descr_struct
*dw_loc_descr_ref
;
1910 typedef struct pubname_struct
*pubname_ref
;
1911 typedef dw_die_ref
*arange_ref
;
1913 /* Describe a double word constant value. */
1915 typedef struct dw_long_long_struct
1922 /* Describe a floating point constant value. */
1924 typedef struct dw_fp_struct
1931 /* Each entry in the line_info_table maintains the file and
1932 line nuber associated with the label generated for that
1933 entry. The label gives the PC value associated with
1934 the line number entry. */
1936 typedef struct dw_line_info_struct
1938 unsigned long dw_file_num
;
1939 unsigned long dw_line_num
;
1943 /* Line information for functions in separate sections; each one gets its
1945 typedef struct dw_separate_line_info_struct
1947 unsigned long dw_file_num
;
1948 unsigned long dw_line_num
;
1949 unsigned long function
;
1951 dw_separate_line_info_entry
;
1953 /* The dw_val_node describes an attibute's value, as it is
1954 represented internally. */
1956 typedef struct dw_val_struct
1958 dw_val_class val_class
;
1962 dw_loc_descr_ref val_loc
;
1964 long unsigned val_unsigned
;
1965 dw_long_long_const val_long_long
;
1966 dw_float_const val_float
;
1967 dw_die_ref val_die_ref
;
1968 unsigned val_fde_index
;
1972 unsigned char val_flag
;
1978 /* Locations in memory are described using a sequence of stack machine
1981 typedef struct dw_loc_descr_struct
1983 dw_loc_descr_ref dw_loc_next
;
1984 enum dwarf_location_atom dw_loc_opc
;
1985 dw_val_node dw_loc_oprnd1
;
1986 dw_val_node dw_loc_oprnd2
;
1990 /* Each DIE attribute has a field specifying the attribute kind,
1991 a link to the next attribute in the chain, and an attribute value.
1992 Attributes are typically linked below the DIE they modify. */
1994 typedef struct dw_attr_struct
1996 enum dwarf_attribute dw_attr
;
1997 dw_attr_ref dw_attr_next
;
1998 dw_val_node dw_attr_val
;
2002 /* The Debugging Information Entry (DIE) structure */
2004 typedef struct die_struct
2006 enum dwarf_tag die_tag
;
2007 dw_attr_ref die_attr
;
2008 dw_attr_ref die_attr_last
;
2009 dw_die_ref die_parent
;
2010 dw_die_ref die_child
;
2011 dw_die_ref die_child_last
;
2013 dw_offset die_offset
;
2014 unsigned long die_abbrev
;
2018 /* The pubname structure */
2020 typedef struct pubname_struct
2027 /* The limbo die list structure. */
2028 typedef struct limbo_die_struct
2031 struct limbo_die_struct
*next
;
2035 /* How to start an assembler comment. */
2036 #ifndef ASM_COMMENT_START
2037 #define ASM_COMMENT_START ";#"
2040 /* Define a macro which returns non-zero for a TYPE_DECL which was
2041 implicitly generated for a tagged type.
2043 Note that unlike the gcc front end (which generates a NULL named
2044 TYPE_DECL node for each complete tagged type, each array type, and
2045 each function type node created) the g++ front end generates a
2046 _named_ TYPE_DECL node for each tagged type node created.
2047 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2048 generate a DW_TAG_typedef DIE for them. */
2050 #define TYPE_DECL_IS_STUB(decl) \
2051 (DECL_NAME (decl) == NULL_TREE \
2052 || (DECL_ARTIFICIAL (decl) \
2053 && is_tagged_type (TREE_TYPE (decl)) \
2054 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2055 /* This is necessary for stub decls that \
2056 appear in nested inline functions. */ \
2057 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2058 && (decl_ultimate_origin (decl) \
2059 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2061 /* Information concerning the compilation unit's programming
2062 language, and compiler version. */
2064 extern int flag_traditional
;
2065 extern char *version_string
;
2066 extern char *language_string
;
2068 /* Fixed size portion of the DWARF compilation unit header. */
2069 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2071 /* Fixed size portion of debugging line information prolog. */
2072 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2074 /* Fixed size portion of public names info. */
2075 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2077 /* Fixed size portion of the address range info. */
2078 #define DWARF_ARANGES_HEADER_SIZE \
2079 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2081 /* Define the architecture-dependent minimum instruction length (in bytes).
2082 In this implementation of DWARF, this field is used for information
2083 purposes only. Since GCC generates assembly language, we have
2084 no a priori knowledge of how many instruction bytes are generated
2085 for each source line, and therefore can use only the DW_LNE_set_address
2086 and DW_LNS_fixed_advance_pc line information commands. */
2088 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2089 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2092 /* Minimum line offset in a special line info. opcode.
2093 This value was chosen to give a reasonable range of values. */
2094 #define DWARF_LINE_BASE -10
2096 /* First special line opcde - leave room for the standard opcodes. */
2097 #define DWARF_LINE_OPCODE_BASE 10
2099 /* Range of line offsets in a special line info. opcode. */
2100 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2102 /* Flag that indicates the initial value of the is_stmt_start flag.
2103 In the present implementation, we do not mark any lines as
2104 the beginning of a source statement, because that information
2105 is not made available by the GCC front-end. */
2106 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2108 /* This location is used by calc_die_sizes() to keep track
2109 the offset of each DIE within the .debug_info section. */
2110 static unsigned long next_die_offset
;
2112 /* Record the root of the DIE's built for the current compilation unit. */
2113 static dw_die_ref comp_unit_die
;
2115 /* A list of DIEs with a NULL parent waiting to be relocated. */
2116 static limbo_die_node
*limbo_die_list
= 0;
2118 /* Pointer to an array of filenames referenced by this compilation unit. */
2119 static char **file_table
;
2121 /* Total number of entries in the table (i.e. array) pointed to by
2122 `file_table'. This is the *total* and includes both used and unused
2124 static unsigned file_table_allocated
;
2126 /* Number of entries in the file_table which are actually in use. */
2127 static unsigned file_table_in_use
;
2129 /* Size (in elements) of increments by which we may expand the filename
2131 #define FILE_TABLE_INCREMENT 64
2133 /* Local pointer to the name of the main input file. Initialized in
2135 static char *primary_filename
;
2137 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2138 which their beginnings are encountered. We output Dwarf debugging info
2139 that refers to the beginnings and ends of the ranges of code for each
2140 lexical block. The labels themselves are generated in final.c, which
2141 assigns numbers to the blocks in the same way. */
2142 static unsigned next_block_number
= 2;
2144 /* A pointer to the base of a table of references to DIE's that describe
2145 declarations. The table is indexed by DECL_UID() which is a unique
2146 number, indentifying each decl. */
2147 static dw_die_ref
*decl_die_table
;
2149 /* Number of elements currently allocated for the decl_die_table. */
2150 static unsigned decl_die_table_allocated
;
2152 /* Number of elements in decl_die_table currently in use. */
2153 static unsigned decl_die_table_in_use
;
2155 /* Size (in elements) of increments by which we may expand the
2157 #define DECL_DIE_TABLE_INCREMENT 256
2159 /* A pointer to the base of a table of references to declaration
2160 scopes. This table is a display which tracks the nesting
2161 of declaration scopes at the current scope and containing
2162 scopes. This table is used to find the proper place to
2163 define type declaration DIE's. */
2164 static tree
*decl_scope_table
;
2166 /* Number of elements currently allocated for the decl_scope_table. */
2167 static unsigned decl_scope_table_allocated
;
2169 /* Current level of nesting of declataion scopes. */
2170 static unsigned decl_scope_depth
;
2172 /* Size (in elements) of increments by which we may expand the
2173 decl_scope_table. */
2174 #define DECL_SCOPE_TABLE_INCREMENT 64
2176 /* A pointer to the base of a list of references to DIE's that
2177 are uniquely identified by their tag, presence/absence of
2178 children DIE's, and list of attribute/value pairs. */
2179 static dw_die_ref
*abbrev_die_table
;
2181 /* Number of elements currently allocated for abbrev_die_table. */
2182 static unsigned abbrev_die_table_allocated
;
2184 /* Number of elements in type_die_table currently in use. */
2185 static unsigned abbrev_die_table_in_use
;
2187 /* Size (in elements) of increments by which we may expand the
2188 abbrev_die_table. */
2189 #define ABBREV_DIE_TABLE_INCREMENT 256
2191 /* A pointer to the base of a table that contains line information
2192 for each source code line in .text in the compilation unit. */
2193 static dw_line_info_ref line_info_table
;
2195 /* Number of elements currently allocated for line_info_table. */
2196 static unsigned line_info_table_allocated
;
2198 /* Number of elements in separate_line_info_table currently in use. */
2199 static unsigned separate_line_info_table_in_use
;
2201 /* A pointer to the base of a table that contains line information
2202 for each source code line outside of .text in the compilation unit. */
2203 static dw_separate_line_info_ref separate_line_info_table
;
2205 /* Number of elements currently allocated for separate_line_info_table. */
2206 static unsigned separate_line_info_table_allocated
;
2208 /* Number of elements in line_info_table currently in use. */
2209 static unsigned line_info_table_in_use
;
2211 /* Size (in elements) of increments by which we may expand the
2213 #define LINE_INFO_TABLE_INCREMENT 1024
2215 /* A pointer to the base of a table that contains a list of publicly
2216 accessible names. */
2217 static pubname_ref pubname_table
;
2219 /* Number of elements currently allocated for pubname_table. */
2220 static unsigned pubname_table_allocated
;
2222 /* Number of elements in pubname_table currently in use. */
2223 static unsigned pubname_table_in_use
;
2225 /* Size (in elements) of increments by which we may expand the
2227 #define PUBNAME_TABLE_INCREMENT 64
2229 /* A pointer to the base of a table that contains a list of publicly
2230 accessible names. */
2231 static arange_ref arange_table
;
2233 /* Number of elements currently allocated for arange_table. */
2234 static unsigned arange_table_allocated
;
2236 /* Number of elements in arange_table currently in use. */
2237 static unsigned arange_table_in_use
;
2239 /* Size (in elements) of increments by which we may expand the
2241 #define ARANGE_TABLE_INCREMENT 64
2243 /* A pointer to the base of a list of pending types which we haven't
2244 generated DIEs for yet, but which we will have to come back to
2247 static tree
*pending_types_list
;
2249 /* Number of elements currently allocated for the pending_types_list. */
2250 static unsigned pending_types_allocated
;
2252 /* Number of elements of pending_types_list currently in use. */
2253 static unsigned pending_types
;
2255 /* Size (in elements) of increments by which we may expand the pending
2256 types list. Actually, a single hunk of space of this size should
2257 be enough for most typical programs. */
2258 #define PENDING_TYPES_INCREMENT 64
2260 /* Record whether the function being analyzed contains inlined functions. */
2261 static int current_function_has_inlines
;
2262 static int comp_unit_has_inlines
;
2264 /* A pointer to the ..._DECL node which we have most recently been working
2265 on. We keep this around just in case something about it looks screwy and
2266 we want to tell the user what the source coordinates for the actual
2268 static tree dwarf_last_decl
;
2270 /* Forward declarations for functions defined in this file. */
2272 static void addr_const_to_string
PROTO((char *, rtx
));
2273 static char *addr_to_string
PROTO((rtx
));
2274 static int is_pseudo_reg
PROTO((rtx
));
2275 static tree type_main_variant
PROTO((tree
));
2276 static int is_tagged_type
PROTO((tree
));
2277 static char *dwarf_tag_name
PROTO((unsigned));
2278 static char *dwarf_attr_name
PROTO((unsigned));
2279 static char *dwarf_form_name
PROTO((unsigned));
2280 static char *dwarf_stack_op_name
PROTO((unsigned));
2281 static char *dwarf_type_encoding_name
PROTO((unsigned));
2282 static tree decl_ultimate_origin
PROTO((tree
));
2283 static tree block_ultimate_origin
PROTO((tree
));
2284 static tree decl_class_context
PROTO((tree
));
2285 static void add_dwarf_attr
PROTO((dw_die_ref
, dw_attr_ref
));
2286 static void add_AT_flag
PROTO((dw_die_ref
,
2287 enum dwarf_attribute
,
2289 static void add_AT_int
PROTO((dw_die_ref
,
2290 enum dwarf_attribute
, long));
2291 static void add_AT_unsigned
PROTO((dw_die_ref
,
2292 enum dwarf_attribute
,
2294 static void add_AT_long_long
PROTO((dw_die_ref
,
2295 enum dwarf_attribute
,
2296 unsigned long, unsigned long));
2297 static void add_AT_float
PROTO((dw_die_ref
,
2298 enum dwarf_attribute
,
2300 static void add_AT_string
PROTO((dw_die_ref
,
2301 enum dwarf_attribute
, char *));
2302 static void add_AT_die_ref
PROTO((dw_die_ref
,
2303 enum dwarf_attribute
,
2305 static void add_AT_fde_ref
PROTO((dw_die_ref
,
2306 enum dwarf_attribute
,
2308 static void add_AT_loc
PROTO((dw_die_ref
,
2309 enum dwarf_attribute
,
2311 static void add_AT_addr
PROTO((dw_die_ref
,
2312 enum dwarf_attribute
, char *));
2313 static void add_AT_lbl_id
PROTO((dw_die_ref
,
2314 enum dwarf_attribute
, char *));
2315 static void add_AT_setion_offset
PROTO((dw_die_ref
,
2316 enum dwarf_attribute
, char *));
2317 static int is_extern_subr_die
PROTO((dw_die_ref
));
2318 static dw_attr_ref get_AT
PROTO((dw_die_ref
,
2319 enum dwarf_attribute
));
2320 static char *get_AT_low_pc
PROTO((dw_die_ref
));
2321 static char *get_AT_hi_pc
PROTO((dw_die_ref
));
2322 static char *get_AT_string
PROTO((dw_die_ref
,
2323 enum dwarf_attribute
));
2324 static int get_AT_flag
PROTO((dw_die_ref
,
2325 enum dwarf_attribute
));
2326 static unsigned get_AT_unsigned
PROTO((dw_die_ref
,
2327 enum dwarf_attribute
));
2328 static int is_c_family
PROTO((void));
2329 static int is_fortran
PROTO((void));
2330 static void remove_AT
PROTO((dw_die_ref
,
2331 enum dwarf_attribute
));
2332 static void remove_children
PROTO((dw_die_ref
));
2333 static void add_child_die
PROTO((dw_die_ref
, dw_die_ref
));
2334 static dw_die_ref new_die
PROTO((enum dwarf_tag
, dw_die_ref
));
2335 static dw_die_ref lookup_type_die
PROTO((tree
));
2336 static void equate_type_number_to_die
PROTO((tree
, dw_die_ref
));
2337 static dw_die_ref lookup_decl_die
PROTO((tree
));
2338 static void equate_decl_number_to_die
PROTO((tree
, dw_die_ref
));
2339 static dw_loc_descr_ref new_loc_descr
PROTO((enum dwarf_location_atom
,
2340 unsigned long, unsigned long));
2341 static void add_loc_descr
PROTO((dw_loc_descr_ref
*,
2343 static void print_spaces
PROTO((FILE *));
2344 static void print_die
PROTO((dw_die_ref
, FILE *));
2345 static void print_dwarf_line_table
PROTO((FILE *));
2346 static void add_sibling_atttributes
PROTO((dw_die_ref
));
2347 static void build_abbrev_table
PROTO((dw_die_ref
));
2348 static unsigned long size_of_string
PROTO((char *));
2349 static unsigned long size_of_loc_descr
PROTO((dw_loc_descr_ref
));
2350 static unsigned long size_of_locs
PROTO((dw_loc_descr_ref
));
2351 static int constant_size
PROTO((long unsigned));
2352 static unsigned long size_of_die
PROTO((dw_die_ref
));
2353 static void calc_die_sizes
PROTO((dw_die_ref
));
2354 static unsigned long size_of_prolog
PROTO((void));
2355 static unsigned long size_of_line_info
PROTO((void));
2356 static unsigned long size_of_pubnames
PROTO((void));
2357 static unsigned long size_of_aranges
PROTO((void));
2358 static enum dwarf_form value_format
PROTO((dw_val_ref
));
2359 static void output_value_format
PROTO((dw_val_ref
));
2360 static void output_abbrev_section
PROTO((void));
2361 static void output_loc_operands
PROTO((dw_loc_descr_ref
));
2362 static unsigned long sibling_offset
PROTO((dw_die_ref
));
2363 static void output_die
PROTO((dw_die_ref
));
2364 static void output_compilation_unit_header
PROTO((void));
2365 static char *dwarf2_name
PROTO((tree
, int));
2366 static void add_pubname
PROTO((tree
, dw_die_ref
));
2367 static void output_pubnames
PROTO((void));
2368 static void add_arrange
PROTO((tree
, dw_die_ref
));
2369 static void output_arranges
PROTO((void));
2370 static void output_line_info
PROTO((void));
2371 static int is_body_block
PROTO((tree
));
2372 static dw_die_ref base_type_die
PROTO((tree
));
2373 static tree root_type
PROTO((tree
));
2374 static int is_base_type
PROTO((tree
));
2375 static dw_die_ref modified_type_die
PROTO((tree
, int, int, dw_die_ref
));
2376 static int type_is_enum
PROTO((tree
));
2377 static dw_loc_descr_ref reg_loc_descriptor
PROTO((rtx
));
2378 static dw_loc_descr_ref based_loc_descr
PROTO((unsigned, long));
2379 static int is_based_loc
PROTO((rtx
));
2380 static dw_loc_descr_ref mem_loc_descriptor
PROTO((rtx
));
2381 static dw_loc_descr_ref concat_loc_descriptor
PROTO((rtx
, rtx
));
2382 static dw_loc_descr_ref loc_descriptor
PROTO((rtx
));
2383 static unsigned ceiling
PROTO((unsigned, unsigned));
2384 static tree field_type
PROTO((tree
));
2385 static unsigned simple_type_align_in_bits
PROTO((tree
));
2386 static unsigned simple_type_size_in_bits
PROTO((tree
));
2387 static unsigned field_byte_offset
PROTO((tree
));
2388 static void add_AT_location_description
PROTO((dw_die_ref
,
2389 enum dwarf_attribute
, rtx
));
2390 static void add_data_member_location_attribute
PROTO((dw_die_ref
, tree
));
2391 static void add_const_value_attribute
PROTO((dw_die_ref
, rtx
));
2392 static void add_location_or_const_value_attribute
PROTO((dw_die_ref
, tree
));
2393 static void add_name_attribute
PROTO((dw_die_ref
, char *));
2394 static void add_bound_info
PROTO((dw_die_ref
,
2395 enum dwarf_attribute
, tree
));
2396 static void add_subscript_info
PROTO((dw_die_ref
, tree
));
2397 static void add_byte_size_attribute
PROTO((dw_die_ref
, tree
));
2398 static void add_bit_offset_attribute
PROTO((dw_die_ref
, tree
));
2399 static void add_bit_size_attribute
PROTO((dw_die_ref
, tree
));
2400 static void add_prototyped_attribute
PROTO((dw_die_ref
, tree
));
2401 static void add_abstract_origin_attribute
PROTO((dw_die_ref
, tree
));
2402 static void add_pure_or_virtual_attribute
PROTO((dw_die_ref
, tree
));
2403 static void add_src_coords_attributes
PROTO((dw_die_ref
, tree
));
2404 static void ad_name_and_src_coords_attributes
PROTO((dw_die_ref
, tree
));
2405 static void push_decl_scope
PROTO((tree
));
2406 static dw_die_ref scope_die_for
PROTO((tree
, dw_die_ref
));
2407 static void pop_decl_scope
PROTO((void));
2408 static void add_type_attribute
PROTO((dw_die_ref
, tree
, int, int,
2410 static char *type_tag
PROTO((tree
));
2411 static tree member_declared_type
PROTO((tree
));
2412 static char *decl_start_label
PROTO((tree
));
2413 static void gen_arrqay_type_die
PROTO((tree
, dw_die_ref
));
2414 static void gen_set_type_die
PROTO((tree
, dw_die_ref
));
2415 static void gen_entry_point_die
PROTO((tree
, dw_die_ref
));
2416 static void pend_type
PROTO((tree
));
2417 static void output_pending_types_for_scope
PROTO((dw_die_ref
));
2418 static void gen_inlined_enumeration_type_die
PROTO((tree
, dw_die_ref
));
2419 static void gen_inlined_structure_type_die
PROTO((tree
, dw_die_ref
));
2420 static void gen_inlined_union_type_die
PROTO((tree
, dw_die_ref
));
2421 static void gen_enumeration_type_die
PROTO((tree
, dw_die_ref
));
2422 static dw_die_ref gen_formal_parameter_die
PROTO((tree
, dw_die_ref
));
2423 static void gen_unspecified_parameters_die
PROTO((tree
, dw_die_ref
));
2424 static void gen_formal_types_die
PROTO((tree
, dw_die_ref
));
2425 static void gen_subprogram_die
PROTO((tree
, dw_die_ref
));
2426 static void gen_variable_die
PROTO((tree
, dw_die_ref
));
2427 static void gen_label_die
PROTO((tree
, dw_die_ref
));
2428 static void gen_lexical_block_die
PROTO((tree
, dw_die_ref
, int));
2429 static void gen_inlined_subprogram_die
PROTO((tree
, dw_die_ref
, int));
2430 static void gen_field_die
PROTO((tree
, dw_die_ref
));
2431 static void gen_ptr_to_mbr_type_die
PROTO((tree
, dw_die_ref
));
2432 static void gen_compile_unit_die
PROTO((char *));
2433 static void gen_string_type_die
PROTO((tree
, dw_die_ref
));
2434 static void gen_inheritance_die
PROTO((tree
, dw_die_ref
));
2435 static void gen_member_die
PROTO((tree
, dw_die_ref
));
2436 static void gen_struct_or_union_type_die
PROTO((tree
, dw_die_ref
));
2437 static void gen_subroutine_type_die
PROTO((tree
, dw_die_ref
));
2438 static void gen_typedef_die
PROTO((tree
, dw_die_ref
));
2439 static void gen_type_die
PROTO((tree
, dw_die_ref
));
2440 static void gen_tagged_type_instantiation_die
PROTO((tree
, dw_die_ref
));
2441 static void gen_block_die
PROTO((tree
, dw_die_ref
, int));
2442 static void decls_for_scope
PROTO((tree
, dw_die_ref
, int));
2443 static int is_redundant_typedef
PROTO((tree
));
2444 static void gen_decl_die
PROTO((tree
, dw_die_ref
));
2445 static unsigned lookup_filename
PROTO((char *));
2447 /* Section names used to hold DWARF debugging information. */
2448 #ifndef DEBUG_INFO_SECTION
2449 #define DEBUG_INFO_SECTION ".debug_info"
2451 #ifndef ABBREV_SECTION
2452 #define ABBREV_SECTION ".debug_abbrev"
2454 #ifndef ARANGES_SECTION
2455 #define ARANGES_SECTION ".debug_aranges"
2457 #ifndef DW_MACINFO_SECTION
2458 #define DW_MACINFO_SECTION ".debug_macinfo"
2460 #ifndef DEBUG_LINE_SECTION
2461 #define DEBUG_LINE_SECTION ".debug_line"
2464 #define LOC_SECTION ".debug_loc"
2466 #ifndef PUBNAMES_SECTION
2467 #define PUBNAMES_SECTION ".debug_pubnames"
2470 #define STR_SECTION ".debug_str"
2473 /* Standerd ELF section names for compiled code and data. */
2474 #ifndef TEXT_SECTION
2475 #define TEXT_SECTION ".text"
2477 #ifndef DATA_SECTION
2478 #define DATA_SECTION ".data"
2481 #define BSS_SECTION ".bss"
2485 /* Definitions of defaults for formats and names of various special
2486 (artificial) labels which may be generated within this file (when the -g
2487 options is used and DWARF_DEBUGGING_INFO is in effect.
2488 If necessary, these may be overridden from within the tm.h file, but
2489 typically, overriding these defaults is unnecessary. */
2491 static char text_end_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
2493 #ifndef TEXT_END_LABEL
2494 #define TEXT_END_LABEL "Letext"
2496 #ifndef DATA_END_LABEL
2497 #define DATA_END_LABEL "Ledata"
2499 #ifndef BSS_END_LABEL
2500 #define BSS_END_LABEL "Lebss"
2502 #ifndef INSN_LABEL_FMT
2503 #define INSN_LABEL_FMT "LI%u_"
2505 #ifndef BLOCK_BEGIN_LABEL
2506 #define BLOCK_BEGIN_LABEL "LBB"
2508 #ifndef BLOCK_END_LABEL
2509 #define BLOCK_END_LABEL "LBE"
2511 #ifndef BODY_BEGIN_LABEL
2512 #define BODY_BEGIN_LABEL "Lbb"
2514 #ifndef BODY_END_LABEL
2515 #define BODY_END_LABEL "Lbe"
2517 #ifndef LINE_CODE_LABEL
2518 #define LINE_CODE_LABEL "LM"
2520 #ifndef SEPARATE_LINE_CODE_LABEL
2521 #define SEPARATE_LINE_CODE_LABEL "LSM"
2524 /* Convert a reference to the assembler name of a C-level name. This
2525 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2526 a string rather than writing to a file. */
2527 #ifndef ASM_NAME_TO_STRING
2528 #define ASM_NAME_TO_STRING(STR, NAME) \
2530 if ((NAME)[0] == '*') \
2531 strcpy (STR, NAME+1); \
2533 strcpy (STR, NAME); \
2538 /* Convert an integer constant expression into assembler syntax. Addition
2539 and subtraction are the only arithmetic that may appear in these
2540 expressions. This is an adaptation of output_addr_const in final.c.
2541 Here, the target of the conversion is a string buffer. We can't use
2542 output_addr_const directly, because it writes to a file. */
2545 addr_const_to_string (str
, x
)
2554 switch (GET_CODE (x
))
2564 ASM_NAME_TO_STRING (buf1
, XSTR (x
, 0));
2569 ASM_GENERATE_INTERNAL_LABEL (buf1
, "L", CODE_LABEL_NUMBER (XEXP (x
, 0)));
2570 ASM_NAME_TO_STRING (buf2
, buf1
);
2575 ASM_GENERATE_INTERNAL_LABEL (buf1
, "L", CODE_LABEL_NUMBER (x
));
2576 ASM_NAME_TO_STRING (buf2
, buf1
);
2581 sprintf (buf1
, HOST_WIDE_INT_PRINT_DEC
, INTVAL (x
));
2586 /* This used to output parentheses around the expression, but that does
2587 not work on the 386 (either ATT or BSD assembler). */
2588 addr_const_to_string (buf1
, XEXP (x
, 0));
2593 if (GET_MODE (x
) == VOIDmode
)
2595 /* We can use %d if the number is one word and positive. */
2596 if (CONST_DOUBLE_HIGH (x
))
2597 sprintf (buf1
, HOST_WIDE_INT_PRINT_DOUBLE_HEX
,
2598 CONST_DOUBLE_HIGH (x
), CONST_DOUBLE_LOW (x
));
2599 else if (CONST_DOUBLE_LOW (x
) < 0)
2600 sprintf (buf1
, HOST_WIDE_INT_PRINT_HEX
, CONST_DOUBLE_LOW (x
));
2602 sprintf (buf1
, HOST_WIDE_INT_PRINT_DEC
,
2603 CONST_DOUBLE_LOW (x
));
2607 /* We can't handle floating point constants; PRINT_OPERAND must
2609 output_operand_lossage ("floating constant misused");
2613 /* Some assemblers need integer constants to appear last (eg masm). */
2614 if (GET_CODE (XEXP (x
, 0)) == CONST_INT
)
2616 addr_const_to_string (buf1
, XEXP (x
, 1));
2618 if (INTVAL (XEXP (x
, 0)) >= 0)
2621 addr_const_to_string (buf1
, XEXP (x
, 0));
2626 addr_const_to_string (buf1
, XEXP (x
, 0));
2628 if (INTVAL (XEXP (x
, 1)) >= 0)
2631 addr_const_to_string (buf1
, XEXP (x
, 1));
2637 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2638 can't handle that. */
2639 x
= simplify_subtraction (x
);
2640 if (GET_CODE (x
) != MINUS
)
2643 addr_const_to_string (buf1
, XEXP (x
, 0));
2646 if (GET_CODE (XEXP (x
, 1)) == CONST_INT
2647 && INTVAL (XEXP (x
, 1)) < 0)
2649 strcat (str
, ASM_OPEN_PAREN
);
2650 addr_const_to_string (buf1
, XEXP (x
, 1));
2652 strcat (str
, ASM_CLOSE_PAREN
);
2656 addr_const_to_string (buf1
, XEXP (x
, 1));
2663 addr_const_to_string (buf1
, XEXP (x
, 0));
2668 output_operand_lossage ("invalid expression as operand");
2672 /* Convert an address constant to a string, and return a pointer to
2673 a copy of the result, located on the heap. */
2680 addr_const_to_string (buf
, x
);
2681 return xstrdup (buf
);
2684 /* Test if rtl node points to a psuedo register. */
2690 return (((GET_CODE (rtl
) == REG
) && (REGNO (rtl
) >= FIRST_PSEUDO_REGISTER
))
2691 || ((GET_CODE (rtl
) == SUBREG
)
2692 && (REGNO (XEXP (rtl
, 0)) >= FIRST_PSEUDO_REGISTER
)));
2695 /* Return a reference to a type, with its const and volatile qualifiers
2699 type_main_variant (type
)
2702 type
= TYPE_MAIN_VARIANT (type
);
2704 /* There really should be only one main variant among any group of variants
2705 of a given type (and all of the MAIN_VARIANT values for all members of
2706 the group should point to that one type) but sometimes the C front-end
2707 messes this up for array types, so we work around that bug here. */
2709 if (TREE_CODE (type
) == ARRAY_TYPE
)
2710 while (type
!= TYPE_MAIN_VARIANT (type
))
2711 type
= TYPE_MAIN_VARIANT (type
);
2716 /* Return non-zero if the given type node represents a tagged type. */
2719 is_tagged_type (type
)
2722 register enum tree_code code
= TREE_CODE (type
);
2724 return (code
== RECORD_TYPE
|| code
== UNION_TYPE
2725 || code
== QUAL_UNION_TYPE
|| code
== ENUMERAL_TYPE
);
2728 /* Convert a DIE tag into its string name. */
2731 dwarf_tag_name (tag
)
2732 register unsigned tag
;
2736 case DW_TAG_padding
:
2737 return "DW_TAG_padding";
2738 case DW_TAG_array_type
:
2739 return "DW_TAG_array_type";
2740 case DW_TAG_class_type
:
2741 return "DW_TAG_class_type";
2742 case DW_TAG_entry_point
:
2743 return "DW_TAG_entry_point";
2744 case DW_TAG_enumeration_type
:
2745 return "DW_TAG_enumeration_type";
2746 case DW_TAG_formal_parameter
:
2747 return "DW_TAG_formal_parameter";
2748 case DW_TAG_imported_declaration
:
2749 return "DW_TAG_imported_declaration";
2751 return "DW_TAG_label";
2752 case DW_TAG_lexical_block
:
2753 return "DW_TAG_lexical_block";
2755 return "DW_TAG_member";
2756 case DW_TAG_pointer_type
:
2757 return "DW_TAG_pointer_type";
2758 case DW_TAG_reference_type
:
2759 return "DW_TAG_reference_type";
2760 case DW_TAG_compile_unit
:
2761 return "DW_TAG_compile_unit";
2762 case DW_TAG_string_type
:
2763 return "DW_TAG_string_type";
2764 case DW_TAG_structure_type
:
2765 return "DW_TAG_structure_type";
2766 case DW_TAG_subroutine_type
:
2767 return "DW_TAG_subroutine_type";
2768 case DW_TAG_typedef
:
2769 return "DW_TAG_typedef";
2770 case DW_TAG_union_type
:
2771 return "DW_TAG_union_type";
2772 case DW_TAG_unspecified_parameters
:
2773 return "DW_TAG_unspecified_parameters";
2774 case DW_TAG_variant
:
2775 return "DW_TAG_variant";
2776 case DW_TAG_common_block
:
2777 return "DW_TAG_common_block";
2778 case DW_TAG_common_inclusion
:
2779 return "DW_TAG_common_inclusion";
2780 case DW_TAG_inheritance
:
2781 return "DW_TAG_inheritance";
2782 case DW_TAG_inlined_subroutine
:
2783 return "DW_TAG_inlined_subroutine";
2785 return "DW_TAG_module";
2786 case DW_TAG_ptr_to_member_type
:
2787 return "DW_TAG_ptr_to_member_type";
2788 case DW_TAG_set_type
:
2789 return "DW_TAG_set_type";
2790 case DW_TAG_subrange_type
:
2791 return "DW_TAG_subrange_type";
2792 case DW_TAG_with_stmt
:
2793 return "DW_TAG_with_stmt";
2794 case DW_TAG_access_declaration
:
2795 return "DW_TAG_access_declaration";
2796 case DW_TAG_base_type
:
2797 return "DW_TAG_base_type";
2798 case DW_TAG_catch_block
:
2799 return "DW_TAG_catch_block";
2800 case DW_TAG_const_type
:
2801 return "DW_TAG_const_type";
2802 case DW_TAG_constant
:
2803 return "DW_TAG_constant";
2804 case DW_TAG_enumerator
:
2805 return "DW_TAG_enumerator";
2806 case DW_TAG_file_type
:
2807 return "DW_TAG_file_type";
2809 return "DW_TAG_friend";
2810 case DW_TAG_namelist
:
2811 return "DW_TAG_namelist";
2812 case DW_TAG_namelist_item
:
2813 return "DW_TAG_namelist_item";
2814 case DW_TAG_packed_type
:
2815 return "DW_TAG_packed_type";
2816 case DW_TAG_subprogram
:
2817 return "DW_TAG_subprogram";
2818 case DW_TAG_template_type_param
:
2819 return "DW_TAG_template_type_param";
2820 case DW_TAG_template_value_param
:
2821 return "DW_TAG_template_value_param";
2822 case DW_TAG_thrown_type
:
2823 return "DW_TAG_thrown_type";
2824 case DW_TAG_try_block
:
2825 return "DW_TAG_try_block";
2826 case DW_TAG_variant_part
:
2827 return "DW_TAG_variant_part";
2828 case DW_TAG_variable
:
2829 return "DW_TAG_variable";
2830 case DW_TAG_volatile_type
:
2831 return "DW_TAG_volatile_type";
2832 case DW_TAG_MIPS_loop
:
2833 return "DW_TAG_MIPS_loop";
2834 case DW_TAG_format_label
:
2835 return "DW_TAG_format_label";
2836 case DW_TAG_function_template
:
2837 return "DW_TAG_function_template";
2838 case DW_TAG_class_template
:
2839 return "DW_TAG_class_template";
2841 return "DW_TAG_<unknown>";
2845 /* Convert a DWARF attribute code into its string name. */
2848 dwarf_attr_name (attr
)
2849 register unsigned attr
;
2854 return "DW_AT_sibling";
2855 case DW_AT_location
:
2856 return "DW_AT_location";
2858 return "DW_AT_name";
2859 case DW_AT_ordering
:
2860 return "DW_AT_ordering";
2861 case DW_AT_subscr_data
:
2862 return "DW_AT_subscr_data";
2863 case DW_AT_byte_size
:
2864 return "DW_AT_byte_size";
2865 case DW_AT_bit_offset
:
2866 return "DW_AT_bit_offset";
2867 case DW_AT_bit_size
:
2868 return "DW_AT_bit_size";
2869 case DW_AT_element_list
:
2870 return "DW_AT_element_list";
2871 case DW_AT_stmt_list
:
2872 return "DW_AT_stmt_list";
2874 return "DW_AT_low_pc";
2876 return "DW_AT_high_pc";
2877 case DW_AT_language
:
2878 return "DW_AT_language";
2880 return "DW_AT_member";
2882 return "DW_AT_discr";
2883 case DW_AT_discr_value
:
2884 return "DW_AT_discr_value";
2885 case DW_AT_visibility
:
2886 return "DW_AT_visibility";
2888 return "DW_AT_import";
2889 case DW_AT_string_length
:
2890 return "DW_AT_string_length";
2891 case DW_AT_common_reference
:
2892 return "DW_AT_common_reference";
2893 case DW_AT_comp_dir
:
2894 return "DW_AT_comp_dir";
2895 case DW_AT_const_value
:
2896 return "DW_AT_const_value";
2897 case DW_AT_containing_type
:
2898 return "DW_AT_containing_type";
2899 case DW_AT_default_value
:
2900 return "DW_AT_default_value";
2902 return "DW_AT_inline";
2903 case DW_AT_is_optional
:
2904 return "DW_AT_is_optional";
2905 case DW_AT_lower_bound
:
2906 return "DW_AT_lower_bound";
2907 case DW_AT_producer
:
2908 return "DW_AT_producer";
2909 case DW_AT_prototyped
:
2910 return "DW_AT_prototyped";
2911 case DW_AT_return_addr
:
2912 return "DW_AT_return_addr";
2913 case DW_AT_start_scope
:
2914 return "DW_AT_start_scope";
2915 case DW_AT_stride_size
:
2916 return "DW_AT_stride_size";
2917 case DW_AT_upper_bound
:
2918 return "DW_AT_upper_bound";
2919 case DW_AT_abstract_origin
:
2920 return "DW_AT_abstract_origin";
2921 case DW_AT_accessibility
:
2922 return "DW_AT_accessibility";
2923 case DW_AT_address_class
:
2924 return "DW_AT_address_class";
2925 case DW_AT_artificial
:
2926 return "DW_AT_artificial";
2927 case DW_AT_base_types
:
2928 return "DW_AT_base_types";
2929 case DW_AT_calling_convention
:
2930 return "DW_AT_calling_convention";
2932 return "DW_AT_count";
2933 case DW_AT_data_member_location
:
2934 return "DW_AT_data_member_location";
2935 case DW_AT_decl_column
:
2936 return "DW_AT_decl_column";
2937 case DW_AT_decl_file
:
2938 return "DW_AT_decl_file";
2939 case DW_AT_decl_line
:
2940 return "DW_AT_decl_line";
2941 case DW_AT_declaration
:
2942 return "DW_AT_declaration";
2943 case DW_AT_discr_list
:
2944 return "DW_AT_discr_list";
2945 case DW_AT_encoding
:
2946 return "DW_AT_encoding";
2947 case DW_AT_external
:
2948 return "DW_AT_external";
2949 case DW_AT_frame_base
:
2950 return "DW_AT_frame_base";
2952 return "DW_AT_friend";
2953 case DW_AT_identifier_case
:
2954 return "DW_AT_identifier_case";
2955 case DW_AT_macro_info
:
2956 return "DW_AT_macro_info";
2957 case DW_AT_namelist_items
:
2958 return "DW_AT_namelist_items";
2959 case DW_AT_priority
:
2960 return "DW_AT_priority";
2962 return "DW_AT_segment";
2963 case DW_AT_specification
:
2964 return "DW_AT_specification";
2965 case DW_AT_static_link
:
2966 return "DW_AT_static_link";
2968 return "DW_AT_type";
2969 case DW_AT_use_location
:
2970 return "DW_AT_use_location";
2971 case DW_AT_variable_parameter
:
2972 return "DW_AT_variable_parameter";
2973 case DW_AT_virtuality
:
2974 return "DW_AT_virtuality";
2975 case DW_AT_vtable_elem_location
:
2976 return "DW_AT_vtable_elem_location";
2978 case DW_AT_MIPS_fde
:
2979 return "DW_AT_MIPS_fde";
2980 case DW_AT_MIPS_loop_begin
:
2981 return "DW_AT_MIPS_loop_begin";
2982 case DW_AT_MIPS_tail_loop_begin
:
2983 return "DW_AT_MIPS_tail_loop_begin";
2984 case DW_AT_MIPS_epilog_begin
:
2985 return "DW_AT_MIPS_epilog_begin";
2986 case DW_AT_MIPS_loop_unroll_factor
:
2987 return "DW_AT_MIPS_loop_unroll_factor";
2988 case DW_AT_MIPS_software_pipeline_depth
:
2989 return "DW_AT_MIPS_software_pipeline_depth";
2990 case DW_AT_MIPS_linkage_name
:
2991 return "DW_AT_MIPS_linkage_name";
2992 case DW_AT_MIPS_stride
:
2993 return "DW_AT_MIPS_stride";
2994 case DW_AT_MIPS_abstract_name
:
2995 return "DW_AT_MIPS_abstract_name";
2996 case DW_AT_MIPS_clone_origin
:
2997 return "DW_AT_MIPS_clone_origin";
2998 case DW_AT_MIPS_has_inlines
:
2999 return "DW_AT_MIPS_has_inlines";
3001 case DW_AT_sf_names
:
3002 return "DW_AT_sf_names";
3003 case DW_AT_src_info
:
3004 return "DW_AT_src_info";
3005 case DW_AT_mac_info
:
3006 return "DW_AT_mac_info";
3007 case DW_AT_src_coords
:
3008 return "DW_AT_src_coords";
3009 case DW_AT_body_begin
:
3010 return "DW_AT_body_begin";
3011 case DW_AT_body_end
:
3012 return "DW_AT_body_end";
3014 return "DW_AT_<unknown>";
3018 /* Convert a DWARF value form code into its string name. */
3021 dwarf_form_name (form
)
3022 register unsigned form
;
3027 return "DW_FORM_addr";
3028 case DW_FORM_block2
:
3029 return "DW_FORM_block2";
3030 case DW_FORM_block4
:
3031 return "DW_FORM_block4";
3033 return "DW_FORM_data2";
3035 return "DW_FORM_data4";
3037 return "DW_FORM_data8";
3038 case DW_FORM_string
:
3039 return "DW_FORM_string";
3041 return "DW_FORM_block";
3042 case DW_FORM_block1
:
3043 return "DW_FORM_block1";
3045 return "DW_FORM_data1";
3047 return "DW_FORM_flag";
3049 return "DW_FORM_sdata";
3051 return "DW_FORM_strp";
3053 return "DW_FORM_udata";
3054 case DW_FORM_ref_addr
:
3055 return "DW_FORM_ref_addr";
3057 return "DW_FORM_ref1";
3059 return "DW_FORM_ref2";
3061 return "DW_FORM_ref4";
3063 return "DW_FORM_ref8";
3064 case DW_FORM_ref_udata
:
3065 return "DW_FORM_ref_udata";
3066 case DW_FORM_indirect
:
3067 return "DW_FORM_indirect";
3069 return "DW_FORM_<unknown>";
3073 /* Convert a DWARF stack opcode into its string name. */
3076 dwarf_stack_op_name (op
)
3077 register unsigned op
;
3082 return "DW_OP_addr";
3084 return "DW_OP_deref";
3086 return "DW_OP_const1u";
3088 return "DW_OP_const1s";
3090 return "DW_OP_const2u";
3092 return "DW_OP_const2s";
3094 return "DW_OP_const4u";
3096 return "DW_OP_const4s";
3098 return "DW_OP_const8u";
3100 return "DW_OP_const8s";
3102 return "DW_OP_constu";
3104 return "DW_OP_consts";
3108 return "DW_OP_drop";
3110 return "DW_OP_over";
3112 return "DW_OP_pick";
3114 return "DW_OP_swap";
3118 return "DW_OP_xderef";
3126 return "DW_OP_minus";
3138 return "DW_OP_plus";
3139 case DW_OP_plus_uconst
:
3140 return "DW_OP_plus_uconst";
3146 return "DW_OP_shra";
3164 return "DW_OP_skip";
3166 return "DW_OP_lit0";
3168 return "DW_OP_lit1";
3170 return "DW_OP_lit2";
3172 return "DW_OP_lit3";
3174 return "DW_OP_lit4";
3176 return "DW_OP_lit5";
3178 return "DW_OP_lit6";
3180 return "DW_OP_lit7";
3182 return "DW_OP_lit8";
3184 return "DW_OP_lit9";
3186 return "DW_OP_lit10";
3188 return "DW_OP_lit11";
3190 return "DW_OP_lit12";
3192 return "DW_OP_lit13";
3194 return "DW_OP_lit14";
3196 return "DW_OP_lit15";
3198 return "DW_OP_lit16";
3200 return "DW_OP_lit17";
3202 return "DW_OP_lit18";
3204 return "DW_OP_lit19";
3206 return "DW_OP_lit20";
3208 return "DW_OP_lit21";
3210 return "DW_OP_lit22";
3212 return "DW_OP_lit23";
3214 return "DW_OP_lit24";
3216 return "DW_OP_lit25";
3218 return "DW_OP_lit26";
3220 return "DW_OP_lit27";
3222 return "DW_OP_lit28";
3224 return "DW_OP_lit29";
3226 return "DW_OP_lit30";
3228 return "DW_OP_lit31";
3230 return "DW_OP_reg0";
3232 return "DW_OP_reg1";
3234 return "DW_OP_reg2";
3236 return "DW_OP_reg3";
3238 return "DW_OP_reg4";
3240 return "DW_OP_reg5";
3242 return "DW_OP_reg6";
3244 return "DW_OP_reg7";
3246 return "DW_OP_reg8";
3248 return "DW_OP_reg9";
3250 return "DW_OP_reg10";
3252 return "DW_OP_reg11";
3254 return "DW_OP_reg12";
3256 return "DW_OP_reg13";
3258 return "DW_OP_reg14";
3260 return "DW_OP_reg15";
3262 return "DW_OP_reg16";
3264 return "DW_OP_reg17";
3266 return "DW_OP_reg18";
3268 return "DW_OP_reg19";
3270 return "DW_OP_reg20";
3272 return "DW_OP_reg21";
3274 return "DW_OP_reg22";
3276 return "DW_OP_reg23";
3278 return "DW_OP_reg24";
3280 return "DW_OP_reg25";
3282 return "DW_OP_reg26";
3284 return "DW_OP_reg27";
3286 return "DW_OP_reg28";
3288 return "DW_OP_reg29";
3290 return "DW_OP_reg30";
3292 return "DW_OP_reg31";
3294 return "DW_OP_breg0";
3296 return "DW_OP_breg1";
3298 return "DW_OP_breg2";
3300 return "DW_OP_breg3";
3302 return "DW_OP_breg4";
3304 return "DW_OP_breg5";
3306 return "DW_OP_breg6";
3308 return "DW_OP_breg7";
3310 return "DW_OP_breg8";
3312 return "DW_OP_breg9";
3314 return "DW_OP_breg10";
3316 return "DW_OP_breg11";
3318 return "DW_OP_breg12";
3320 return "DW_OP_breg13";
3322 return "DW_OP_breg14";
3324 return "DW_OP_breg15";
3326 return "DW_OP_breg16";
3328 return "DW_OP_breg17";
3330 return "DW_OP_breg18";
3332 return "DW_OP_breg19";
3334 return "DW_OP_breg20";
3336 return "DW_OP_breg21";
3338 return "DW_OP_breg22";
3340 return "DW_OP_breg23";
3342 return "DW_OP_breg24";
3344 return "DW_OP_breg25";
3346 return "DW_OP_breg26";
3348 return "DW_OP_breg27";
3350 return "DW_OP_breg28";
3352 return "DW_OP_breg29";
3354 return "DW_OP_breg30";
3356 return "DW_OP_breg31";
3358 return "DW_OP_regx";
3360 return "DW_OP_fbreg";
3362 return "DW_OP_bregx";
3364 return "DW_OP_piece";
3365 case DW_OP_deref_size
:
3366 return "DW_OP_deref_size";
3367 case DW_OP_xderef_size
:
3368 return "DW_OP_xderef_size";
3372 return "OP_<unknown>";
3376 /* Convert a DWARF type code into its string name. */
3379 dwarf_type_encoding_name (enc
)
3380 register unsigned enc
;
3384 case DW_ATE_address
:
3385 return "DW_ATE_address";
3386 case DW_ATE_boolean
:
3387 return "DW_ATE_boolean";
3388 case DW_ATE_complex_float
:
3389 return "DW_ATE_complex_float";
3391 return "DW_ATE_float";
3393 return "DW_ATE_signed";
3394 case DW_ATE_signed_char
:
3395 return "DW_ATE_signed_char";
3396 case DW_ATE_unsigned
:
3397 return "DW_ATE_unsigned";
3398 case DW_ATE_unsigned_char
:
3399 return "DW_ATE_unsigned_char";
3401 return "DW_ATE_<unknown>";
3405 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3406 instance of an inlined instance of a decl which is local to an inline
3407 function, so we have to trace all of the way back through the origin chain
3408 to find out what sort of node actually served as the original seed for the
3412 decl_ultimate_origin (decl
)
3415 register tree immediate_origin
= DECL_ABSTRACT_ORIGIN (decl
);
3417 if (immediate_origin
== NULL_TREE
)
3421 register tree ret_val
;
3422 register tree lookahead
= immediate_origin
;
3426 ret_val
= lookahead
;
3427 lookahead
= DECL_ABSTRACT_ORIGIN (ret_val
);
3429 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
3435 /* Determine the "ultimate origin" of a block. The block may be an inlined
3436 instance of an inlined instance of a block which is local to an inline
3437 function, so we have to trace all of the way back through the origin chain
3438 to find out what sort of node actually served as the original seed for the
3442 block_ultimate_origin (block
)
3443 register tree block
;
3445 register tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
3447 if (immediate_origin
== NULL_TREE
)
3451 register tree ret_val
;
3452 register tree lookahead
= immediate_origin
;
3456 ret_val
= lookahead
;
3457 lookahead
= (TREE_CODE (ret_val
) == BLOCK
)
3458 ? BLOCK_ABSTRACT_ORIGIN (ret_val
)
3461 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
3467 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3468 of a virtual function may refer to a base class, so we check the 'this'
3472 decl_class_context (decl
)
3475 tree context
= NULL_TREE
;
3477 if (TREE_CODE (decl
) != FUNCTION_DECL
|| ! DECL_VINDEX (decl
))
3478 context
= DECL_CONTEXT (decl
);
3480 context
= TYPE_MAIN_VARIANT
3481 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
3483 if (context
&& TREE_CODE_CLASS (TREE_CODE (context
)) != 't')
3484 context
= NULL_TREE
;
3489 /* Add an attribute/value pair to a DIE */
3492 add_dwarf_attr (die
, attr
)
3493 register dw_die_ref die
;
3494 register dw_attr_ref attr
;
3496 if (die
!= NULL
&& attr
!= NULL
)
3498 if (die
->die_attr
== NULL
)
3500 die
->die_attr
= attr
;
3501 die
->die_attr_last
= attr
;
3505 die
->die_attr_last
->dw_attr_next
= attr
;
3506 die
->die_attr_last
= attr
;
3511 /* Add a flag value attribute to a DIE. */
3514 add_AT_flag (die
, attr_kind
, flag
)
3515 register dw_die_ref die
;
3516 register enum dwarf_attribute attr_kind
;
3517 register unsigned flag
;
3519 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3521 attr
->dw_attr_next
= NULL
;
3522 attr
->dw_attr
= attr_kind
;
3523 attr
->dw_attr_val
.val_class
= dw_val_class_flag
;
3524 attr
->dw_attr_val
.v
.val_flag
= flag
;
3525 add_dwarf_attr (die
, attr
);
3528 /* Add a signed integer attribute value to a DIE. */
3531 add_AT_int (die
, attr_kind
, int_val
)
3532 register dw_die_ref die
;
3533 register enum dwarf_attribute attr_kind
;
3534 register long int int_val
;
3536 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3538 attr
->dw_attr_next
= NULL
;
3539 attr
->dw_attr
= attr_kind
;
3540 attr
->dw_attr_val
.val_class
= dw_val_class_const
;
3541 attr
->dw_attr_val
.v
.val_int
= int_val
;
3542 add_dwarf_attr (die
, attr
);
3545 /* Add an unsigned integer attribute value to a DIE. */
3548 add_AT_unsigned (die
, attr_kind
, unsigned_val
)
3549 register dw_die_ref die
;
3550 register enum dwarf_attribute attr_kind
;
3551 register unsigned long unsigned_val
;
3553 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3555 attr
->dw_attr_next
= NULL
;
3556 attr
->dw_attr
= attr_kind
;
3557 attr
->dw_attr_val
.val_class
= dw_val_class_unsigned_const
;
3558 attr
->dw_attr_val
.v
.val_unsigned
= unsigned_val
;
3559 add_dwarf_attr (die
, attr
);
3562 /* Add an unsigned double integer attribute value to a DIE. */
3565 add_AT_long_long (die
, attr_kind
, val_hi
, val_low
)
3566 register dw_die_ref die
;
3567 register enum dwarf_attribute attr_kind
;
3568 register unsigned long val_hi
;
3569 register unsigned long val_low
;
3571 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3573 attr
->dw_attr_next
= NULL
;
3574 attr
->dw_attr
= attr_kind
;
3575 attr
->dw_attr_val
.val_class
= dw_val_class_long_long
;
3576 attr
->dw_attr_val
.v
.val_long_long
.hi
= val_hi
;
3577 attr
->dw_attr_val
.v
.val_long_long
.low
= val_low
;
3578 add_dwarf_attr (die
, attr
);
3581 /* Add a floating point attribute value to a DIE and return it. */
3584 add_AT_float (die
, attr_kind
, length
, array
)
3585 register dw_die_ref die
;
3586 register enum dwarf_attribute attr_kind
;
3587 register unsigned length
;
3588 register long *array
;
3590 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3592 attr
->dw_attr_next
= NULL
;
3593 attr
->dw_attr
= attr_kind
;
3594 attr
->dw_attr_val
.val_class
= dw_val_class_float
;
3595 attr
->dw_attr_val
.v
.val_float
.length
= length
;
3596 attr
->dw_attr_val
.v
.val_float
.array
= array
;
3597 add_dwarf_attr (die
, attr
);
3600 /* Add a string attribute value to a DIE. */
3603 add_AT_string (die
, attr_kind
, str
)
3604 register dw_die_ref die
;
3605 register enum dwarf_attribute attr_kind
;
3608 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3610 attr
->dw_attr_next
= NULL
;
3611 attr
->dw_attr
= attr_kind
;
3612 attr
->dw_attr_val
.val_class
= dw_val_class_str
;
3613 attr
->dw_attr_val
.v
.val_str
= xstrdup (str
);
3614 add_dwarf_attr (die
, attr
);
3617 /* Add a DIE reference attribute value to a DIE. */
3620 add_AT_die_ref (die
, attr_kind
, targ_die
)
3621 register dw_die_ref die
;
3622 register enum dwarf_attribute attr_kind
;
3623 register dw_die_ref targ_die
;
3625 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3627 attr
->dw_attr_next
= NULL
;
3628 attr
->dw_attr
= attr_kind
;
3629 attr
->dw_attr_val
.val_class
= dw_val_class_die_ref
;
3630 attr
->dw_attr_val
.v
.val_die_ref
= targ_die
;
3631 add_dwarf_attr (die
, attr
);
3634 /* Add an FDE reference attribute value to a DIE. */
3637 add_AT_fde_ref (die
, attr_kind
, targ_fde
)
3638 register dw_die_ref die
;
3639 register enum dwarf_attribute attr_kind
;
3640 register unsigned targ_fde
;
3642 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3644 attr
->dw_attr_next
= NULL
;
3645 attr
->dw_attr
= attr_kind
;
3646 attr
->dw_attr_val
.val_class
= dw_val_class_fde_ref
;
3647 attr
->dw_attr_val
.v
.val_fde_index
= targ_fde
;
3648 add_dwarf_attr (die
, attr
);
3651 /* Add a location description attribute value to a DIE. */
3654 add_AT_loc (die
, attr_kind
, loc
)
3655 register dw_die_ref die
;
3656 register enum dwarf_attribute attr_kind
;
3657 register dw_loc_descr_ref loc
;
3659 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3661 attr
->dw_attr_next
= NULL
;
3662 attr
->dw_attr
= attr_kind
;
3663 attr
->dw_attr_val
.val_class
= dw_val_class_loc
;
3664 attr
->dw_attr_val
.v
.val_loc
= loc
;
3665 add_dwarf_attr (die
, attr
);
3668 /* Add an address constant attribute value to a DIE. */
3671 add_AT_addr (die
, attr_kind
, addr
)
3672 register dw_die_ref die
;
3673 register enum dwarf_attribute attr_kind
;
3676 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3678 attr
->dw_attr_next
= NULL
;
3679 attr
->dw_attr
= attr_kind
;
3680 attr
->dw_attr_val
.val_class
= dw_val_class_addr
;
3681 attr
->dw_attr_val
.v
.val_addr
= addr
;
3682 add_dwarf_attr (die
, attr
);
3685 /* Add a label identifier attribute value to a DIE. */
3688 add_AT_lbl_id (die
, attr_kind
, lbl_id
)
3689 register dw_die_ref die
;
3690 register enum dwarf_attribute attr_kind
;
3691 register char *lbl_id
;
3693 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3695 attr
->dw_attr_next
= NULL
;
3696 attr
->dw_attr
= attr_kind
;
3697 attr
->dw_attr_val
.val_class
= dw_val_class_lbl_id
;
3698 attr
->dw_attr_val
.v
.val_lbl_id
= xstrdup (lbl_id
);
3699 add_dwarf_attr (die
, attr
);
3702 /* Add a section offset attribute value to a DIE. */
3705 add_AT_section_offset (die
, attr_kind
, section
)
3706 register dw_die_ref die
;
3707 register enum dwarf_attribute attr_kind
;
3708 register char *section
;
3710 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3712 attr
->dw_attr_next
= NULL
;
3713 attr
->dw_attr
= attr_kind
;
3714 attr
->dw_attr_val
.val_class
= dw_val_class_section_offset
;
3715 attr
->dw_attr_val
.v
.val_section
= section
;
3716 add_dwarf_attr (die
, attr
);
3720 /* Test if die refers to an external subroutine. */
3723 is_extern_subr_die (die
)
3724 register dw_die_ref die
;
3726 register dw_attr_ref a
;
3727 register int is_subr
= FALSE
;
3728 register int is_extern
= FALSE
;
3730 if (die
!= NULL
&& die
->die_tag
== DW_TAG_subprogram
)
3733 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
3735 if (a
->dw_attr
== DW_AT_external
3736 && a
->dw_attr_val
.val_class
== dw_val_class_flag
3737 && a
->dw_attr_val
.v
.val_flag
!= 0)
3745 return is_subr
&& is_extern
;
3748 /* Get the attribute of type attr_kind. */
3750 static inline dw_attr_ref
3751 get_AT (die
, attr_kind
)
3752 register dw_die_ref die
;
3753 register enum dwarf_attribute attr_kind
;
3755 register dw_attr_ref a
;
3756 register dw_die_ref spec
= NULL
;
3760 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
3762 if (a
->dw_attr
== attr_kind
)
3765 if (a
->dw_attr
== DW_AT_specification
3766 || a
->dw_attr
== DW_AT_abstract_origin
)
3767 spec
= a
->dw_attr_val
.v
.val_die_ref
;
3771 return get_AT (spec
, attr_kind
);
3777 /* Return the "low pc" attribute value, typically associated with
3778 a subprogram DIE. Return null if the "low pc" attribute is
3779 either not prsent, or if it cannot be represented as an
3780 assembler label identifier. */
3782 static inline char *
3784 register dw_die_ref die
;
3786 register dw_attr_ref a
= get_AT (die
, DW_AT_low_pc
);
3788 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_lbl_id
)
3789 return a
->dw_attr_val
.v
.val_lbl_id
;
3794 /* Return the "high pc" attribute value, typically associated with
3795 a subprogram DIE. Return null if the "high pc" attribute is
3796 either not prsent, or if it cannot be represented as an
3797 assembler label identifier. */
3799 static inline char *
3801 register dw_die_ref die
;
3803 register dw_attr_ref a
= get_AT (die
, DW_AT_high_pc
);
3805 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_lbl_id
)
3806 return a
->dw_attr_val
.v
.val_lbl_id
;
3811 /* Return the value of the string attribute designated by ATTR_KIND, or
3812 NULL if it is not present. */
3814 static inline char *
3815 get_AT_string (die
, attr_kind
)
3816 register dw_die_ref die
;
3817 register enum dwarf_attribute attr_kind
;
3819 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3821 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_str
)
3822 return a
->dw_attr_val
.v
.val_str
;
3827 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3828 if it is not present. */
3831 get_AT_flag (die
, attr_kind
)
3832 register dw_die_ref die
;
3833 register enum dwarf_attribute attr_kind
;
3835 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3837 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_flag
)
3838 return a
->dw_attr_val
.v
.val_flag
;
3843 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3844 if it is not present. */
3846 static inline unsigned
3847 get_AT_unsigned (die
, attr_kind
)
3848 register dw_die_ref die
;
3849 register enum dwarf_attribute attr_kind
;
3851 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3853 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_unsigned_const
)
3854 return a
->dw_attr_val
.v
.val_unsigned
;
3862 register unsigned lang
= get_AT_unsigned (comp_unit_die
, DW_AT_language
);
3864 return (lang
== DW_LANG_C
|| lang
== DW_LANG_C89
3865 || lang
== DW_LANG_C_plus_plus
);
3871 register unsigned lang
= get_AT_unsigned (comp_unit_die
, DW_AT_language
);
3873 return (lang
== DW_LANG_Fortran77
|| lang
== DW_LANG_Fortran90
);
3876 /* Remove the specified attribute if present. */
3879 remove_AT (die
, attr_kind
)
3880 register dw_die_ref die
;
3881 register enum dwarf_attribute attr_kind
;
3883 register dw_attr_ref a
;
3884 register dw_attr_ref removed
= NULL
;;
3888 if (die
->die_attr
->dw_attr
== attr_kind
)
3890 removed
= die
->die_attr
;
3891 if (die
->die_attr_last
== die
->die_attr
)
3892 die
->die_attr_last
= NULL
;
3894 die
->die_attr
= die
->die_attr
->dw_attr_next
;
3898 for (a
= die
->die_attr
; a
->dw_attr_next
!= NULL
;
3899 a
= a
->dw_attr_next
)
3900 if (a
->dw_attr_next
->dw_attr
== attr_kind
)
3902 removed
= a
->dw_attr_next
;
3903 if (die
->die_attr_last
== a
->dw_attr_next
)
3904 die
->die_attr_last
= a
;
3906 a
->dw_attr_next
= a
->dw_attr_next
->dw_attr_next
;
3915 /* Discard the children of this DIE. */
3918 remove_children (die
)
3919 register dw_die_ref die
;
3921 register dw_die_ref child_die
= die
->die_child
;
3923 die
->die_child
= NULL
;
3924 die
->die_child_last
= NULL
;
3926 while (child_die
!= NULL
)
3928 register dw_die_ref tmp_die
= child_die
;
3929 register dw_attr_ref a
;
3931 child_die
= child_die
->die_sib
;
3933 for (a
= tmp_die
->die_attr
; a
!= NULL
; )
3935 register dw_attr_ref tmp_a
= a
;
3937 a
= a
->dw_attr_next
;
3945 /* Add a child DIE below its parent. */
3948 add_child_die (die
, child_die
)
3949 register dw_die_ref die
;
3950 register dw_die_ref child_die
;
3952 if (die
!= NULL
&& child_die
!= NULL
)
3954 if (die
== child_die
)
3956 child_die
->die_parent
= die
;
3957 child_die
->die_sib
= NULL
;
3959 if (die
->die_child
== NULL
)
3961 die
->die_child
= child_die
;
3962 die
->die_child_last
= child_die
;
3966 die
->die_child_last
->die_sib
= child_die
;
3967 die
->die_child_last
= child_die
;
3972 /* Return a pointer to a newly created DIE node. */
3974 static inline dw_die_ref
3975 new_die (tag_value
, parent_die
)
3976 register enum dwarf_tag tag_value
;
3977 register dw_die_ref parent_die
;
3979 register dw_die_ref die
= (dw_die_ref
) xmalloc (sizeof (die_node
));
3981 die
->die_tag
= tag_value
;
3982 die
->die_abbrev
= 0;
3983 die
->die_offset
= 0;
3984 die
->die_child
= NULL
;
3985 die
->die_parent
= NULL
;
3986 die
->die_sib
= NULL
;
3987 die
->die_child_last
= NULL
;
3988 die
->die_attr
= NULL
;
3989 die
->die_attr_last
= NULL
;
3991 if (parent_die
!= NULL
)
3992 add_child_die (parent_die
, die
);
3995 limbo_die_node
*limbo_node
;
3997 limbo_node
= (limbo_die_node
*) xmalloc (sizeof (limbo_die_node
));
3998 limbo_node
->die
= die
;
3999 limbo_node
->next
= limbo_die_list
;
4000 limbo_die_list
= limbo_node
;
4006 /* Return the DIE associated with the given type specifier. */
4008 static inline dw_die_ref
4009 lookup_type_die (type
)
4012 return (dw_die_ref
) TYPE_SYMTAB_POINTER (type
);
4015 /* Equate a DIE to a given type specifier. */
4018 equate_type_number_to_die (type
, type_die
)
4020 register dw_die_ref type_die
;
4022 TYPE_SYMTAB_POINTER (type
) = (char *) type_die
;
4025 /* Return the DIE associated with a given declaration. */
4027 static inline dw_die_ref
4028 lookup_decl_die (decl
)
4031 register unsigned decl_id
= DECL_UID (decl
);
4033 return (decl_id
< decl_die_table_in_use
4034 ? decl_die_table
[decl_id
] : NULL
);
4037 /* Equate a DIE to a particular declaration. */
4040 equate_decl_number_to_die (decl
, decl_die
)
4042 register dw_die_ref decl_die
;
4044 register unsigned decl_id
= DECL_UID (decl
);
4045 register unsigned i
;
4046 register unsigned num_allocated
;
4048 if (decl_id
>= decl_die_table_allocated
)
4051 = ((decl_id
+ 1 + DECL_DIE_TABLE_INCREMENT
- 1)
4052 / DECL_DIE_TABLE_INCREMENT
)
4053 * DECL_DIE_TABLE_INCREMENT
;
4056 = (dw_die_ref
*) xrealloc (decl_die_table
,
4057 sizeof (dw_die_ref
) * num_allocated
);
4059 bzero ((char *) &decl_die_table
[decl_die_table_allocated
],
4060 (num_allocated
- decl_die_table_allocated
) * sizeof (dw_die_ref
));
4061 decl_die_table_allocated
= num_allocated
;
4064 if (decl_id
>= decl_die_table_in_use
)
4065 decl_die_table_in_use
= (decl_id
+ 1);
4067 decl_die_table
[decl_id
] = decl_die
;
4070 /* Return a pointer to a newly allocated location description. Location
4071 descriptions are simple expression terms that can be strung
4072 together to form more complicated location (address) descriptions. */
4074 static inline dw_loc_descr_ref
4075 new_loc_descr (op
, oprnd1
, oprnd2
)
4076 register enum dwarf_location_atom op
;
4077 register unsigned long oprnd1
;
4078 register unsigned long oprnd2
;
4080 register dw_loc_descr_ref descr
4081 = (dw_loc_descr_ref
) xmalloc (sizeof (dw_loc_descr_node
));
4083 descr
->dw_loc_next
= NULL
;
4084 descr
->dw_loc_opc
= op
;
4085 descr
->dw_loc_oprnd1
.val_class
= dw_val_class_unsigned_const
;
4086 descr
->dw_loc_oprnd1
.v
.val_unsigned
= oprnd1
;
4087 descr
->dw_loc_oprnd2
.val_class
= dw_val_class_unsigned_const
;
4088 descr
->dw_loc_oprnd2
.v
.val_unsigned
= oprnd2
;
4093 /* Add a location description term to a location description expression. */
4096 add_loc_descr (list_head
, descr
)
4097 register dw_loc_descr_ref
*list_head
;
4098 register dw_loc_descr_ref descr
;
4100 register dw_loc_descr_ref
*d
;
4102 /* Find the end of the chain. */
4103 for (d
= list_head
; (*d
) != NULL
; d
= &(*d
)->dw_loc_next
)
4109 /* Keep track of the number of spaces used to indent the
4110 output of the debugging routines that print the structure of
4111 the DIE internal representation. */
4112 static int print_indent
;
4114 /* Indent the line the number of spaces given by print_indent. */
4117 print_spaces (outfile
)
4120 fprintf (outfile
, "%*s", print_indent
, "");
4123 /* Print the information assoaciated with a given DIE, and its children.
4124 This routine is a debugging aid only. */
4127 print_die (die
, outfile
)
4131 register dw_attr_ref a
;
4132 register dw_die_ref c
;
4134 print_spaces (outfile
);
4135 fprintf (outfile
, "DIE %4u: %s\n",
4136 die
->die_offset
, dwarf_tag_name (die
->die_tag
));
4137 print_spaces (outfile
);
4138 fprintf (outfile
, " abbrev id: %u", die
->die_abbrev
);
4139 fprintf (outfile
, " offset: %u\n", die
->die_offset
);
4141 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
4143 print_spaces (outfile
);
4144 fprintf (outfile
, " %s: ", dwarf_attr_name (a
->dw_attr
));
4146 switch (a
->dw_attr_val
.val_class
)
4148 case dw_val_class_addr
:
4149 fprintf (outfile
, "address");
4151 case dw_val_class_loc
:
4152 fprintf (outfile
, "location descriptor");
4154 case dw_val_class_const
:
4155 fprintf (outfile
, "%d", a
->dw_attr_val
.v
.val_int
);
4157 case dw_val_class_unsigned_const
:
4158 fprintf (outfile
, "%u", a
->dw_attr_val
.v
.val_unsigned
);
4160 case dw_val_class_long_long
:
4161 fprintf (outfile
, "constant (%u,%u)",
4162 a
->dw_attr_val
.v
.val_long_long
.hi
,
4163 a
->dw_attr_val
.v
.val_long_long
.low
);
4165 case dw_val_class_float
:
4166 fprintf (outfile
, "floating-point constant");
4168 case dw_val_class_flag
:
4169 fprintf (outfile
, "%u", a
->dw_attr_val
.v
.val_flag
);
4171 case dw_val_class_die_ref
:
4172 if (a
->dw_attr_val
.v
.val_die_ref
!= NULL
)
4173 fprintf (outfile
, "die -> %u",
4174 a
->dw_attr_val
.v
.val_die_ref
->die_offset
);
4176 fprintf (outfile
, "die -> <null>");
4178 case dw_val_class_lbl_id
:
4179 fprintf (outfile
, "label: %s", a
->dw_attr_val
.v
.val_lbl_id
);
4181 case dw_val_class_section_offset
:
4182 fprintf (outfile
, "section: %s", a
->dw_attr_val
.v
.val_section
);
4184 case dw_val_class_str
:
4185 if (a
->dw_attr_val
.v
.val_str
!= NULL
)
4186 fprintf (outfile
, "\"%s\"", a
->dw_attr_val
.v
.val_str
);
4188 fprintf (outfile
, "<null>");
4194 fprintf (outfile
, "\n");
4197 if (die
->die_child
!= NULL
)
4200 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4201 print_die (c
, outfile
);
4207 /* Print the contents of the source code line number correspondence table.
4208 This routine is a debugging aid only. */
4211 print_dwarf_line_table (outfile
)
4214 register unsigned i
;
4215 register dw_line_info_ref line_info
;
4217 fprintf (outfile
, "\n\nDWARF source line information\n");
4218 for (i
= 1; i
< line_info_table_in_use
; ++i
)
4220 line_info
= &line_info_table
[i
];
4221 fprintf (outfile
, "%5d: ", i
);
4222 fprintf (outfile
, "%-20s", file_table
[line_info
->dw_file_num
]);
4223 fprintf (outfile
, "%6d", line_info
->dw_line_num
);
4224 fprintf (outfile
, "\n");
4227 fprintf (outfile
, "\n\n");
4230 /* Print the information collected for a given DIE. */
4233 debug_dwarf_die (die
)
4236 print_die (die
, stderr
);
4239 /* Print all DWARF information collected for the compilation unit.
4240 This routine is a debugging aid only. */
4246 print_die (comp_unit_die
, stderr
);
4247 print_dwarf_line_table (stderr
);
4250 /* Traverse the DIE, and add a sibling attribute if it may have the
4251 effect of speeding up access to siblings. To save some space,
4252 avoid generating sibling attributes for DIE's without children. */
4255 add_sibling_attributes(die
)
4256 register dw_die_ref die
;
4258 register dw_die_ref c
;
4259 register dw_attr_ref attr
;
4260 if (die
!= comp_unit_die
&& die
->die_child
!= NULL
)
4262 attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
4263 attr
->dw_attr_next
= NULL
;
4264 attr
->dw_attr
= DW_AT_sibling
;
4265 attr
->dw_attr_val
.val_class
= dw_val_class_die_ref
;
4266 attr
->dw_attr_val
.v
.val_die_ref
= die
->die_sib
;
4268 /* Add the sibling link to the front of the attribute list. */
4269 attr
->dw_attr_next
= die
->die_attr
;
4270 if (die
->die_attr
== NULL
)
4271 die
->die_attr_last
= attr
;
4273 die
->die_attr
= attr
;
4276 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4277 add_sibling_attributes (c
);
4280 /* The format of each DIE (and its attribute value pairs)
4281 is encoded in an abbreviation table. This routine builds the
4282 abbreviation table and assigns a unique abbreviation id for
4283 each abbreviation entry. The children of each die are visited
4287 build_abbrev_table (die
)
4288 register dw_die_ref die
;
4290 register unsigned long abbrev_id
;
4291 register unsigned long n_alloc
;
4292 register dw_die_ref c
;
4293 register dw_attr_ref d_attr
, a_attr
;
4294 for (abbrev_id
= 1; abbrev_id
< abbrev_die_table_in_use
; ++abbrev_id
)
4296 register dw_die_ref abbrev
= abbrev_die_table
[abbrev_id
];
4298 if (abbrev
->die_tag
== die
->die_tag
)
4300 if ((abbrev
->die_child
!= NULL
) == (die
->die_child
!= NULL
))
4302 a_attr
= abbrev
->die_attr
;
4303 d_attr
= die
->die_attr
;
4305 while (a_attr
!= NULL
&& d_attr
!= NULL
)
4307 if ((a_attr
->dw_attr
!= d_attr
->dw_attr
)
4308 || (value_format (&a_attr
->dw_attr_val
)
4309 != value_format (&d_attr
->dw_attr_val
)))
4312 a_attr
= a_attr
->dw_attr_next
;
4313 d_attr
= d_attr
->dw_attr_next
;
4316 if (a_attr
== NULL
&& d_attr
== NULL
)
4322 if (abbrev_id
>= abbrev_die_table_in_use
)
4324 if (abbrev_die_table_in_use
>= abbrev_die_table_allocated
)
4326 n_alloc
= abbrev_die_table_allocated
+ ABBREV_DIE_TABLE_INCREMENT
;
4328 = (dw_die_ref
*) xrealloc (abbrev_die_table
,
4329 sizeof (dw_die_ref
) * n_alloc
);
4331 bzero ((char *) &abbrev_die_table
[abbrev_die_table_allocated
],
4332 (n_alloc
- abbrev_die_table_allocated
) * sizeof (dw_die_ref
));
4333 abbrev_die_table_allocated
= n_alloc
;
4336 ++abbrev_die_table_in_use
;
4337 abbrev_die_table
[abbrev_id
] = die
;
4340 die
->die_abbrev
= abbrev_id
;
4341 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4342 build_abbrev_table (c
);
4345 /* Return the size of a string, including the null byte. */
4347 static unsigned long
4348 size_of_string (str
)
4351 register unsigned long size
= 0;
4352 register unsigned long slen
= strlen (str
);
4353 register unsigned long i
;
4354 register unsigned c
;
4356 for (i
= 0; i
< slen
; ++i
)
4365 /* Null terminator. */
4370 /* Return the size of a location descriptor. */
4372 static unsigned long
4373 size_of_loc_descr (loc
)
4374 register dw_loc_descr_ref loc
;
4376 register unsigned long size
= 1;
4378 switch (loc
->dw_loc_opc
)
4400 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4403 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4408 case DW_OP_plus_uconst
:
4409 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4447 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4450 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4453 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4456 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4457 size
+= size_of_sleb128 (loc
->dw_loc_oprnd2
.v
.val_int
);
4460 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4462 case DW_OP_deref_size
:
4463 case DW_OP_xderef_size
:
4473 /* Return the size of a series of location descriptors. */
4475 static unsigned long
4477 register dw_loc_descr_ref loc
;
4479 register unsigned long size
= 0;
4481 for (; loc
!= NULL
; loc
= loc
->dw_loc_next
)
4482 size
+= size_of_loc_descr (loc
);
4487 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4490 constant_size (value
)
4491 long unsigned value
;
4498 log
= floor_log2 (value
);
4501 log
= 1 << (floor_log2 (log
) + 1);
4506 /* Return the size of a DIE, as it is represented in the
4507 .debug_info section. */
4509 static unsigned long
4511 register dw_die_ref die
;
4513 register unsigned long size
= 0;
4514 register dw_attr_ref a
;
4516 size
+= size_of_uleb128 (die
->die_abbrev
);
4517 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
4519 switch (a
->dw_attr_val
.val_class
)
4521 case dw_val_class_addr
:
4524 case dw_val_class_loc
:
4526 register unsigned long lsize
4527 = size_of_locs (a
->dw_attr_val
.v
.val_loc
);
4530 size
+= constant_size (lsize
);
4534 case dw_val_class_const
:
4537 case dw_val_class_unsigned_const
:
4538 size
+= constant_size (a
->dw_attr_val
.v
.val_unsigned
);
4540 case dw_val_class_long_long
:
4541 size
+= 1 + 8; /* block */
4543 case dw_val_class_float
:
4544 size
+= 1 + a
->dw_attr_val
.v
.val_float
.length
* 4; /* block */
4546 case dw_val_class_flag
:
4549 case dw_val_class_die_ref
:
4550 size
+= DWARF_OFFSET_SIZE
;
4552 case dw_val_class_fde_ref
:
4553 size
+= DWARF_OFFSET_SIZE
;
4555 case dw_val_class_lbl_id
:
4558 case dw_val_class_section_offset
:
4559 size
+= DWARF_OFFSET_SIZE
;
4561 case dw_val_class_str
:
4562 size
+= size_of_string (a
->dw_attr_val
.v
.val_str
);
4572 /* Size the debgging information associted with a given DIE.
4573 Visits the DIE's children recursively. Updates the global
4574 variable next_die_offset, on each time through. Uses the
4575 current value of next_die_offset to updete the die_offset
4576 field in each DIE. */
4579 calc_die_sizes (die
)
4582 register dw_die_ref c
;
4583 die
->die_offset
= next_die_offset
;
4584 next_die_offset
+= size_of_die (die
);
4586 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4589 if (die
->die_child
!= NULL
)
4590 /* Count the null byte used to terminate sibling lists. */
4591 next_die_offset
+= 1;
4594 /* Return the size of the line information prolog generated for the
4595 compilation unit. */
4597 static unsigned long
4598 size_of_line_prolog ()
4600 register unsigned long size
;
4601 register unsigned long ft_index
;
4603 size
= DWARF_LINE_PROLOG_HEADER_SIZE
;
4605 /* Count the size of the table giving number of args for each
4607 size
+= DWARF_LINE_OPCODE_BASE
- 1;
4609 /* Include directory table is empty (at present). Count only the
4610 the null byte used to terminate the table. */
4613 for (ft_index
= 1; ft_index
< file_table_in_use
; ++ft_index
)
4615 /* File name entry. */
4616 size
+= size_of_string (file_table
[ft_index
]);
4618 /* Include directory index. */
4619 size
+= size_of_uleb128 (0);
4621 /* Modification time. */
4622 size
+= size_of_uleb128 (0);
4624 /* File length in bytes. */
4625 size
+= size_of_uleb128 (0);
4628 /* Count the file table terminator. */
4633 /* Return the size of the line information generated for this
4634 compilation unit. */
4636 static unsigned long
4637 size_of_line_info ()
4639 register unsigned long size
;
4640 register unsigned long lt_index
;
4641 register unsigned long current_line
;
4642 register long line_offset
;
4643 register long line_delta
;
4644 register unsigned long current_file
;
4645 register unsigned long function
;
4646 unsigned long size_of_set_address
;
4648 /* Size of a DW_LNE_set_address instruction. */
4649 size_of_set_address
= 1 + size_of_uleb128 (1 + PTR_SIZE
) + 1 + PTR_SIZE
;
4651 /* Version number. */
4654 /* Prolog length specifier. */
4655 size
+= DWARF_OFFSET_SIZE
;
4658 size
+= size_of_line_prolog ();
4660 /* Set address register instruction. */
4661 size
+= size_of_set_address
;
4665 for (lt_index
= 1; lt_index
< line_info_table_in_use
; ++lt_index
)
4667 register dw_line_info_ref line_info
;
4669 /* Advance pc instruction. */
4670 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4674 size
+= size_of_set_address
;
4676 line_info
= &line_info_table
[lt_index
];
4677 if (line_info
->dw_file_num
!= current_file
)
4679 /* Set file number instruction. */
4681 current_file
= line_info
->dw_file_num
;
4682 size
+= size_of_uleb128 (current_file
);
4685 if (line_info
->dw_line_num
!= current_line
)
4687 line_offset
= line_info
->dw_line_num
- current_line
;
4688 line_delta
= line_offset
- DWARF_LINE_BASE
;
4689 current_line
= line_info
->dw_line_num
;
4690 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
4691 /* 1-byte special line number instruction. */
4695 /* Advance line instruction. */
4697 size
+= size_of_sleb128 (line_offset
);
4698 /* Generate line entry instruction. */
4704 /* Advance pc instruction. */
4708 size
+= size_of_set_address
;
4710 /* End of line number info. marker. */
4711 size
+= 1 + size_of_uleb128 (1) + 1;
4716 for (lt_index
= 0; lt_index
< separate_line_info_table_in_use
; )
4718 register dw_separate_line_info_ref line_info
4719 = &separate_line_info_table
[lt_index
];
4720 if (function
!= line_info
->function
)
4722 function
= line_info
->function
;
4723 /* Set address register instruction. */
4724 size
+= size_of_set_address
;
4728 /* Advance pc instruction. */
4732 size
+= size_of_set_address
;
4735 if (line_info
->dw_file_num
!= current_file
)
4737 /* Set file number instruction. */
4739 current_file
= line_info
->dw_file_num
;
4740 size
+= size_of_uleb128 (current_file
);
4743 if (line_info
->dw_line_num
!= current_line
)
4745 line_offset
= line_info
->dw_line_num
- current_line
;
4746 line_delta
= line_offset
- DWARF_LINE_BASE
;
4747 current_line
= line_info
->dw_line_num
;
4748 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
4749 /* 1-byte special line number instruction. */
4753 /* Advance line instruction. */
4755 size
+= size_of_sleb128 (line_offset
);
4757 /* Generate line entry instruction. */
4764 /* If we're done with a function, end its sequence. */
4765 if (lt_index
== separate_line_info_table_in_use
4766 || separate_line_info_table
[lt_index
].function
!= function
)
4771 /* Advance pc instruction. */
4775 size
+= size_of_set_address
;
4777 /* End of line number info. marker. */
4778 size
+= 1 + size_of_uleb128 (1) + 1;
4785 /* Return the size of the .debug_pubnames table generated for the
4786 compilation unit. */
4788 static unsigned long
4791 register unsigned long size
;
4792 register unsigned i
;
4794 size
= DWARF_PUBNAMES_HEADER_SIZE
;
4795 for (i
= 0; i
< pubname_table_in_use
; ++i
)
4797 register pubname_ref p
= &pubname_table
[i
];
4798 size
+= DWARF_OFFSET_SIZE
+ size_of_string (p
->name
);
4801 size
+= DWARF_OFFSET_SIZE
;
4805 /* Return the size of the information in the .debug_aranges seciton. */
4807 static unsigned long
4810 register unsigned long size
;
4812 size
= DWARF_ARANGES_HEADER_SIZE
;
4814 /* Count the address/length pair for this compilation unit. */
4815 size
+= 2 * PTR_SIZE
;
4816 size
+= 2 * PTR_SIZE
* arange_table_in_use
;
4818 /* Count the two zero words used to terminated the address range table. */
4819 size
+= 2 * PTR_SIZE
;
4823 /* Select the encoding of an attribute value. */
4825 static enum dwarf_form
4829 switch (v
->val_class
)
4831 case dw_val_class_addr
:
4832 return DW_FORM_addr
;
4833 case dw_val_class_loc
:
4834 switch (constant_size (size_of_locs (v
->v
.val_loc
)))
4837 return DW_FORM_block1
;
4839 return DW_FORM_block2
;
4843 case dw_val_class_const
:
4844 return DW_FORM_data4
;
4845 case dw_val_class_unsigned_const
:
4846 switch (constant_size (v
->v
.val_unsigned
))
4849 return DW_FORM_data1
;
4851 return DW_FORM_data2
;
4853 return DW_FORM_data4
;
4855 return DW_FORM_data8
;
4859 case dw_val_class_long_long
:
4860 return DW_FORM_block1
;
4861 case dw_val_class_float
:
4862 return DW_FORM_block1
;
4863 case dw_val_class_flag
:
4864 return DW_FORM_flag
;
4865 case dw_val_class_die_ref
:
4867 case dw_val_class_fde_ref
:
4868 return DW_FORM_data
;
4869 case dw_val_class_lbl_id
:
4870 return DW_FORM_addr
;
4871 case dw_val_class_section_offset
:
4872 return DW_FORM_data
;
4873 case dw_val_class_str
:
4874 return DW_FORM_string
;
4880 /* Output the encoding of an attribute value. */
4883 output_value_format (v
)
4886 enum dwarf_form form
= value_format (v
);
4888 output_uleb128 (form
);
4890 fprintf (asm_out_file
, " (%s)", dwarf_form_name (form
));
4892 fputc ('\n', asm_out_file
);
4895 /* Output the .debug_abbrev section which defines the DIE abbreviation
4899 output_abbrev_section ()
4901 unsigned long abbrev_id
;
4904 for (abbrev_id
= 1; abbrev_id
< abbrev_die_table_in_use
; ++abbrev_id
)
4906 register dw_die_ref abbrev
= abbrev_die_table
[abbrev_id
];
4908 output_uleb128 (abbrev_id
);
4910 fprintf (asm_out_file
, " (abbrev code)");
4912 fputc ('\n', asm_out_file
);
4913 output_uleb128 (abbrev
->die_tag
);
4915 fprintf (asm_out_file
, " (TAG: %s)",
4916 dwarf_tag_name (abbrev
->die_tag
));
4918 fputc ('\n', asm_out_file
);
4919 fprintf (asm_out_file
, "\t%s\t0x%x", ASM_BYTE_OP
,
4920 abbrev
->die_child
!= NULL
? DW_children_yes
: DW_children_no
);
4923 fprintf (asm_out_file
, "\t%s %s",
4925 (abbrev
->die_child
!= NULL
4926 ? "DW_children_yes" : "DW_children_no"));
4928 fputc ('\n', asm_out_file
);
4930 for (a_attr
= abbrev
->die_attr
; a_attr
!= NULL
;
4931 a_attr
= a_attr
->dw_attr_next
)
4933 output_uleb128 (a_attr
->dw_attr
);
4935 fprintf (asm_out_file
, " (%s)",
4936 dwarf_attr_name (a_attr
->dw_attr
));
4938 fputc ('\n', asm_out_file
);
4939 output_value_format (&a_attr
->dw_attr_val
);
4942 fprintf (asm_out_file
, "\t%s\t0,0\n", ASM_BYTE_OP
);
4946 /* Output location description stack opcode's operands (if any). */
4949 output_loc_operands (loc
)
4950 register dw_loc_descr_ref loc
;
4952 register dw_val_ref val1
= &loc
->dw_loc_oprnd1
;
4953 register dw_val_ref val2
= &loc
->dw_loc_oprnd2
;
4955 switch (loc
->dw_loc_opc
)
4958 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file
, val1
->v
.val_addr
);
4959 fputc ('\n', asm_out_file
);
4963 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_flag
);
4964 fputc ('\n', asm_out_file
);
4968 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, val1
->v
.val_int
);
4969 fputc ('\n', asm_out_file
);
4973 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, val1
->v
.val_int
);
4974 fputc ('\n', asm_out_file
);
4979 fputc ('\n', asm_out_file
);
4982 output_uleb128 (val1
->v
.val_unsigned
);
4983 fputc ('\n', asm_out_file
);
4986 output_sleb128 (val1
->v
.val_int
);
4987 fputc ('\n', asm_out_file
);
4990 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_int
);
4991 fputc ('\n', asm_out_file
);
4993 case DW_OP_plus_uconst
:
4994 output_uleb128 (val1
->v
.val_unsigned
);
4995 fputc ('\n', asm_out_file
);
4999 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, val1
->v
.val_int
);
5000 fputc ('\n', asm_out_file
);
5034 output_sleb128 (val1
->v
.val_int
);
5035 fputc ('\n', asm_out_file
);
5038 output_uleb128 (val1
->v
.val_unsigned
);
5039 fputc ('\n', asm_out_file
);
5042 output_sleb128 (val1
->v
.val_int
);
5043 fputc ('\n', asm_out_file
);
5046 output_uleb128 (val1
->v
.val_unsigned
);
5047 fputc ('\n', asm_out_file
);
5048 output_sleb128 (val2
->v
.val_int
);
5049 fputc ('\n', asm_out_file
);
5052 output_uleb128 (val1
->v
.val_unsigned
);
5053 fputc ('\n', asm_out_file
);
5055 case DW_OP_deref_size
:
5056 case DW_OP_xderef_size
:
5057 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_flag
);
5058 fputc ('\n', asm_out_file
);
5065 /* Compute the offset of a sibling. */
5067 static unsigned long
5068 sibling_offset (die
)
5071 unsigned long offset
;
5073 if (die
->die_child_last
== NULL
)
5074 offset
= die
->die_offset
+ size_of_die (die
);
5076 offset
= sibling_offset (die
->die_child_last
) + 1;
5081 /* Output the DIE and its attributes. Called recursively to generate
5082 the definitions of each child DIE. */
5086 register dw_die_ref die
;
5088 register dw_attr_ref a
;
5089 register dw_die_ref c
;
5090 register unsigned long ref_offset
;
5091 register unsigned long size
;
5092 register dw_loc_descr_ref loc
;
5095 output_uleb128 (die
->die_abbrev
);
5097 fprintf (asm_out_file
, " (DIE (0x%x) %s)",
5098 die
->die_offset
, dwarf_tag_name (die
->die_tag
));
5100 fputc ('\n', asm_out_file
);
5102 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
5104 switch (a
->dw_attr_val
.val_class
)
5106 case dw_val_class_addr
:
5107 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file
,
5108 a
->dw_attr_val
.v
.val_addr
);
5111 case dw_val_class_loc
:
5112 size
= size_of_locs (a
->dw_attr_val
.v
.val_loc
);
5114 /* Output the block length for this list of location operations. */
5115 switch (constant_size (size
))
5118 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, size
);
5121 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, size
);
5128 fprintf (asm_out_file
, "\t%s %s",
5129 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5131 fputc ('\n', asm_out_file
);
5132 for (loc
= a
->dw_attr_val
.v
.val_loc
; loc
!= NULL
;
5133 loc
= loc
->dw_loc_next
)
5135 /* Output the opcode. */
5136 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, loc
->dw_loc_opc
);
5138 fprintf (asm_out_file
, "\t%s %s", ASM_COMMENT_START
,
5139 dwarf_stack_op_name (loc
->dw_loc_opc
));
5141 fputc ('\n', asm_out_file
);
5143 /* Output the operand(s) (if any). */
5144 output_loc_operands (loc
);
5148 case dw_val_class_const
:
5149 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, a
->dw_attr_val
.v
.val_int
);
5152 case dw_val_class_unsigned_const
:
5153 switch (constant_size (a
->dw_attr_val
.v
.val_unsigned
))
5156 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5157 a
->dw_attr_val
.v
.val_unsigned
);
5160 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
,
5161 a
->dw_attr_val
.v
.val_unsigned
);
5164 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
,
5165 a
->dw_attr_val
.v
.val_unsigned
);
5168 ASM_OUTPUT_DWARF_DATA8 (asm_out_file
,
5169 a
->dw_attr_val
.v
.val_long_long
.hi
,
5170 a
->dw_attr_val
.v
.val_long_long
.low
);
5177 case dw_val_class_long_long
:
5178 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 8);
5180 fprintf (asm_out_file
, "\t%s %s",
5181 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5183 fputc ('\n', asm_out_file
);
5184 ASM_OUTPUT_DWARF_DATA8 (asm_out_file
,
5185 a
->dw_attr_val
.v
.val_long_long
.hi
,
5186 a
->dw_attr_val
.v
.val_long_long
.low
);
5189 fprintf (asm_out_file
,
5190 "\t%s long long constant", ASM_COMMENT_START
);
5192 fputc ('\n', asm_out_file
);
5195 case dw_val_class_float
:
5196 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5197 a
->dw_attr_val
.v
.val_float
.length
* 4);
5199 fprintf (asm_out_file
, "\t%s %s",
5200 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5202 fputc ('\n', asm_out_file
);
5203 for (i
= 0; i
< a
->dw_attr_val
.v
.val_float
.length
; ++i
)
5205 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
,
5206 a
->dw_attr_val
.v
.val_float
.array
[i
]);
5208 fprintf (asm_out_file
, "\t%s fp constant word %d",
5209 ASM_COMMENT_START
, i
);
5211 fputc ('\n', asm_out_file
);
5215 case dw_val_class_flag
:
5216 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, a
->dw_attr_val
.v
.val_flag
);
5219 case dw_val_class_die_ref
:
5220 if (a
->dw_attr_val
.v
.val_die_ref
!= NULL
)
5221 ref_offset
= a
->dw_attr_val
.v
.val_die_ref
->die_offset
;
5222 else if (a
->dw_attr
== DW_AT_sibling
)
5223 ref_offset
= sibling_offset(die
);
5227 ASM_OUTPUT_DWARF_DATA (asm_out_file
, ref_offset
);
5230 case dw_val_class_fde_ref
:
5233 ASM_GENERATE_INTERNAL_LABEL
5234 (l1
, FDE_AFTER_SIZE_LABEL
, a
->dw_attr_val
.v
.val_fde_index
* 2);
5235 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, l1
);
5236 fprintf (asm_out_file
, " - %d", DWARF_OFFSET_SIZE
);
5240 case dw_val_class_lbl_id
:
5241 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, a
->dw_attr_val
.v
.val_lbl_id
);
5244 case dw_val_class_section_offset
:
5245 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
,
5247 (a
->dw_attr_val
.v
.val_section
));
5250 case dw_val_class_str
:
5252 ASM_OUTPUT_DWARF_STRING (asm_out_file
, a
->dw_attr_val
.v
.val_str
);
5254 ASM_OUTPUT_ASCII (asm_out_file
,
5255 a
->dw_attr_val
.v
.val_str
,
5256 strlen (a
->dw_attr_val
.v
.val_str
) + 1);
5263 if (a
->dw_attr_val
.val_class
!= dw_val_class_loc
5264 && a
->dw_attr_val
.val_class
!= dw_val_class_long_long
5265 && a
->dw_attr_val
.val_class
!= dw_val_class_float
)
5268 fprintf (asm_out_file
, "\t%s %s",
5269 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5271 fputc ('\n', asm_out_file
);
5275 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
5278 if (die
->die_child
!= NULL
)
5280 /* Add null byte to terminate sibling list. */
5281 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5283 fprintf (asm_out_file
, "\t%s end of children of DIE 0x%x",
5284 ASM_COMMENT_START
, die
->die_offset
);
5286 fputc ('\n', asm_out_file
);
5290 /* Output the compilation unit that appears at the beginning of the
5291 .debug_info section, and precedes the DIE descriptions. */
5294 output_compilation_unit_header ()
5296 ASM_OUTPUT_DWARF_DATA (asm_out_file
, next_die_offset
- DWARF_OFFSET_SIZE
);
5298 fprintf (asm_out_file
, "\t%s Length of Compilation Unit Info.",
5301 fputc ('\n', asm_out_file
);
5302 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5304 fprintf (asm_out_file
, "\t%s DWARF version number", ASM_COMMENT_START
);
5306 fputc ('\n', asm_out_file
);
5307 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (ABBREV_SECTION
));
5309 fprintf (asm_out_file
, "\t%s Offset Into Abbrev. Section",
5312 fputc ('\n', asm_out_file
);
5313 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, PTR_SIZE
);
5315 fprintf (asm_out_file
, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START
);
5317 fputc ('\n', asm_out_file
);
5320 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5321 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5322 argument list, and maybe the scope. */
5325 dwarf2_name (decl
, scope
)
5329 return (*decl_printable_name
) (decl
, scope
? 1 : 0);
5332 /* Add a new entry to .debug_pubnames if appropriate. */
5335 add_pubname (decl
, die
)
5341 if (! TREE_PUBLIC (decl
))
5344 if (pubname_table_in_use
== pubname_table_allocated
)
5346 pubname_table_allocated
+= PUBNAME_TABLE_INCREMENT
;
5347 pubname_table
= (pubname_ref
) xrealloc
5348 (pubname_table
, pubname_table_allocated
* sizeof (pubname_entry
));
5351 p
= &pubname_table
[pubname_table_in_use
++];
5354 p
->name
= xstrdup (dwarf2_name (decl
, 1));
5357 /* Output the public names table used to speed up access to externally
5358 visible names. For now, only generate entries for externally
5359 visible procedures. */
5364 register unsigned i
;
5365 register unsigned long pubnames_length
= size_of_pubnames ();
5367 ASM_OUTPUT_DWARF_DATA (asm_out_file
, pubnames_length
);
5370 fprintf (asm_out_file
, "\t%s Length of Public Names Info.",
5373 fputc ('\n', asm_out_file
);
5374 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5377 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5379 fputc ('\n', asm_out_file
);
5380 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (DEBUG_INFO_SECTION
));
5382 fprintf (asm_out_file
, "\t%s Offset of Compilation Unit Info.",
5385 fputc ('\n', asm_out_file
);
5386 ASM_OUTPUT_DWARF_DATA (asm_out_file
, next_die_offset
);
5388 fprintf (asm_out_file
, "\t%s Compilation Unit Length", ASM_COMMENT_START
);
5390 fputc ('\n', asm_out_file
);
5391 for (i
= 0; i
< pubname_table_in_use
; ++i
)
5393 register pubname_ref pub
= &pubname_table
[i
];
5395 ASM_OUTPUT_DWARF_DATA (asm_out_file
, pub
->die
->die_offset
);
5397 fprintf (asm_out_file
, "\t%s DIE offset", ASM_COMMENT_START
);
5399 fputc ('\n', asm_out_file
);
5403 ASM_OUTPUT_DWARF_STRING (asm_out_file
, pub
->name
);
5404 fprintf (asm_out_file
, "%s external name", ASM_COMMENT_START
);
5408 ASM_OUTPUT_ASCII (asm_out_file
, pub
->name
, strlen (pub
->name
) + 1);
5411 fputc ('\n', asm_out_file
);
5414 ASM_OUTPUT_DWARF_DATA (asm_out_file
, 0);
5415 fputc ('\n', asm_out_file
);
5418 /* Add a new entry to .debug_aranges if appropriate. */
5421 add_arange (decl
, die
)
5425 if (! DECL_SECTION_NAME (decl
))
5428 if (arange_table_in_use
== arange_table_allocated
)
5430 arange_table_allocated
+= ARANGE_TABLE_INCREMENT
;
5432 = (arange_ref
) xrealloc (arange_table
,
5433 arange_table_allocated
* sizeof (dw_die_ref
));
5436 arange_table
[arange_table_in_use
++] = die
;
5439 /* Output the information that goes into the .debug_aranges table.
5440 Namely, define the beginning and ending address range of the
5441 text section generated for this compilation unit. */
5446 register unsigned i
;
5447 register unsigned long aranges_length
= size_of_aranges ();
5449 ASM_OUTPUT_DWARF_DATA (asm_out_file
, aranges_length
);
5451 fprintf (asm_out_file
, "\t%s Length of Address Ranges Info.",
5454 fputc ('\n', asm_out_file
);
5455 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5457 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5459 fputc ('\n', asm_out_file
);
5460 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (DEBUG_INFO_SECTION
));
5462 fprintf (asm_out_file
, "\t%s Offset of Compilation Unit Info.",
5465 fputc ('\n', asm_out_file
);
5466 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, PTR_SIZE
);
5468 fprintf (asm_out_file
, "\t%s Size of Address", ASM_COMMENT_START
);
5470 fputc ('\n', asm_out_file
);
5471 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5473 fprintf (asm_out_file
, "\t%s Size of Segment Descriptor",
5476 fputc ('\n', asm_out_file
);
5477 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 4);
5479 fprintf (asm_out_file
, ",0,0");
5482 fprintf (asm_out_file
, "\t%s Pad to %d byte boundary",
5483 ASM_COMMENT_START
, 2 * PTR_SIZE
);
5485 fputc ('\n', asm_out_file
);
5486 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, TEXT_SECTION
);
5488 fprintf (asm_out_file
, "\t%s Address", ASM_COMMENT_START
);
5490 fputc ('\n', asm_out_file
);
5491 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
, text_end_label
, TEXT_SECTION
);
5493 fprintf (asm_out_file
, "%s Length", ASM_COMMENT_START
);
5495 fputc ('\n', asm_out_file
);
5496 for (i
= 0; i
< arange_table_in_use
; ++i
)
5498 dw_die_ref a
= arange_table
[i
];
5500 if (a
->die_tag
== DW_TAG_subprogram
)
5501 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, get_AT_low_pc (a
));
5504 char *name
= get_AT_string (a
, DW_AT_MIPS_linkage_name
);
5506 name
= get_AT_string (a
, DW_AT_name
);
5508 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, name
);
5512 fprintf (asm_out_file
, "\t%s Address", ASM_COMMENT_START
);
5514 fputc ('\n', asm_out_file
);
5515 if (a
->die_tag
== DW_TAG_subprogram
)
5516 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
, get_AT_hi_pc (a
),
5519 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
,
5520 get_AT_unsigned (a
, DW_AT_byte_size
));
5523 fprintf (asm_out_file
, "%s Length", ASM_COMMENT_START
);
5525 fputc ('\n', asm_out_file
);
5528 /* Output the terminator words. */
5529 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
, 0);
5530 fputc ('\n', asm_out_file
);
5531 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
, 0);
5532 fputc ('\n', asm_out_file
);
5535 /* Output the source line number correspondence information. This
5536 information goes into the .debug_line section.
5538 If the format of this data changes, then the function size_of_line_info
5539 must also be adjusted the same way. */
5544 char line_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
5545 char prev_line_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
5546 register unsigned opc
;
5547 register unsigned n_op_args
;
5548 register unsigned long ft_index
;
5549 register unsigned long lt_index
;
5550 register unsigned long current_line
;
5551 register long line_offset
;
5552 register long line_delta
;
5553 register unsigned long current_file
;
5554 register unsigned long function
;
5556 ASM_OUTPUT_DWARF_DATA (asm_out_file
, size_of_line_info ());
5558 fprintf (asm_out_file
, "\t%s Length of Source Line Info.",
5561 fputc ('\n', asm_out_file
);
5562 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5564 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5566 fputc ('\n', asm_out_file
);
5567 ASM_OUTPUT_DWARF_DATA (asm_out_file
, size_of_line_prolog ());
5569 fprintf (asm_out_file
, "\t%s Prolog Length", ASM_COMMENT_START
);
5571 fputc ('\n', asm_out_file
);
5572 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_LINE_MIN_INSTR_LENGTH
);
5574 fprintf (asm_out_file
, "\t%s Minimum Instruction Length",
5577 fputc ('\n', asm_out_file
);
5578 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_LINE_DEFAULT_IS_STMT_START
);
5580 fprintf (asm_out_file
, "\t%s Default is_stmt_start flag",
5583 fputc ('\n', asm_out_file
);
5584 fprintf (asm_out_file
, "\t%s\t%d", ASM_BYTE_OP
, DWARF_LINE_BASE
);
5586 fprintf (asm_out_file
, "\t%s Line Base Value (Special Opcodes)",
5589 fputc ('\n', asm_out_file
);
5590 fprintf (asm_out_file
, "\t%s\t%u", ASM_BYTE_OP
, DWARF_LINE_RANGE
);
5592 fprintf (asm_out_file
, "\t%s Line Range Value (Special Opcodes)",
5595 fputc ('\n', asm_out_file
);
5596 fprintf (asm_out_file
, "\t%s\t%u", ASM_BYTE_OP
, DWARF_LINE_OPCODE_BASE
);
5598 fprintf (asm_out_file
, "\t%s Special Opcode Base", ASM_COMMENT_START
);
5600 fputc ('\n', asm_out_file
);
5601 for (opc
= 1; opc
< DWARF_LINE_OPCODE_BASE
; ++opc
)
5605 case DW_LNS_advance_pc
:
5606 case DW_LNS_advance_line
:
5607 case DW_LNS_set_file
:
5608 case DW_LNS_set_column
:
5609 case DW_LNS_fixed_advance_pc
:
5616 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, n_op_args
);
5618 fprintf (asm_out_file
, "\t%s opcode: 0x%x has %d args",
5619 ASM_COMMENT_START
, opc
, n_op_args
);
5620 fputc ('\n', asm_out_file
);
5624 fprintf (asm_out_file
, "%s Include Directory Table\n", ASM_COMMENT_START
);
5626 /* Include directory table is empty, at present */
5627 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5628 fputc ('\n', asm_out_file
);
5630 fprintf (asm_out_file
, "%s File Name Table\n", ASM_COMMENT_START
);
5632 for (ft_index
= 1; ft_index
< file_table_in_use
; ++ft_index
)
5636 ASM_OUTPUT_DWARF_STRING (asm_out_file
, file_table
[ft_index
]);
5637 fprintf (asm_out_file
, "%s File Entry: 0x%x",
5638 ASM_COMMENT_START
, ft_index
);
5642 ASM_OUTPUT_ASCII (asm_out_file
,
5643 file_table
[ft_index
],
5644 strlen (file_table
[ft_index
]) + 1);
5647 fputc ('\n', asm_out_file
);
5649 /* Include directory index */
5651 fputc ('\n', asm_out_file
);
5653 /* Modification time */
5655 fputc ('\n', asm_out_file
);
5657 /* File length in bytes */
5659 fputc ('\n', asm_out_file
);
5662 /* Terminate the file name table */
5663 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5664 fputc ('\n', asm_out_file
);
5666 /* Set the address register to the first location in the text section */
5667 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5669 fprintf (asm_out_file
, "\t%s DW_LNE_set_address", ASM_COMMENT_START
);
5671 fputc ('\n', asm_out_file
);
5672 output_uleb128 (1 + PTR_SIZE
);
5673 fputc ('\n', asm_out_file
);
5674 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5675 fputc ('\n', asm_out_file
);
5676 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, TEXT_SECTION
);
5677 fputc ('\n', asm_out_file
);
5679 /* Generate the line number to PC correspondence table, encoded as
5680 a series of state machine operations. */
5683 strcpy (prev_line_label
, TEXT_SECTION
);
5684 for (lt_index
= 1; lt_index
< line_info_table_in_use
; ++lt_index
)
5686 register dw_line_info_ref line_info
;
5688 /* Emit debug info for the address of the current line, choosing
5689 the encoding that uses the least amount of space. */
5690 /* ??? Unfortunately, we have little choice here currently, and must
5691 always use the most general form. Gcc does not know the address
5692 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5693 dwarf2 aware assemblers at this time, so we can't use any special
5694 pseudo ops that would allow the assembler to optimally encode this for
5695 us. Many ports do have length attributes which will give an upper
5696 bound on the address range. We could perhaps use length attributes
5697 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5698 ASM_GENERATE_INTERNAL_LABEL (line_label
, LINE_CODE_LABEL
, lt_index
);
5701 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5702 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5704 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5707 fputc ('\n', asm_out_file
);
5708 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
, prev_line_label
);
5709 fputc ('\n', asm_out_file
);
5713 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5714 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5716 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5718 fputc ('\n', asm_out_file
);
5719 output_uleb128 (1 + PTR_SIZE
);
5720 fputc ('\n', asm_out_file
);
5721 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5722 fputc ('\n', asm_out_file
);
5723 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5724 fputc ('\n', asm_out_file
);
5726 strcpy (prev_line_label
, line_label
);
5728 /* Emit debug info for the source file of the current line, if
5729 different from the previous line. */
5730 line_info
= &line_info_table
[lt_index
];
5731 if (line_info
->dw_file_num
!= current_file
)
5733 current_file
= line_info
->dw_file_num
;
5734 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_set_file
);
5736 fprintf (asm_out_file
, "\t%s DW_LNS_set_file", ASM_COMMENT_START
);
5738 fputc ('\n', asm_out_file
);
5739 output_uleb128 (current_file
);
5741 fprintf (asm_out_file
, " (\"%s\")", file_table
[current_file
]);
5743 fputc ('\n', asm_out_file
);
5746 /* Emit debug info for the current line number, choosing the encoding
5747 that uses the least amount of space. */
5748 line_offset
= line_info
->dw_line_num
- current_line
;
5749 line_delta
= line_offset
- DWARF_LINE_BASE
;
5750 current_line
= line_info
->dw_line_num
;
5751 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
5753 /* This can handle deltas from -10 to 234, using the current
5754 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5756 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5757 DWARF_LINE_OPCODE_BASE
+ line_delta
);
5759 fprintf (asm_out_file
,
5760 "\t%s line %d", ASM_COMMENT_START
, current_line
);
5762 fputc ('\n', asm_out_file
);
5766 /* This can handle any delta. This takes at least 4 bytes, depending
5767 on the value being encoded. */
5768 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_advance_line
);
5770 fprintf (asm_out_file
, "\t%s advance to line %d",
5771 ASM_COMMENT_START
, current_line
);
5773 fputc ('\n', asm_out_file
);
5774 output_sleb128 (line_offset
);
5775 fputc ('\n', asm_out_file
);
5776 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_copy
);
5777 fputc ('\n', asm_out_file
);
5781 /* Emit debug info for the address of the end of the function. */
5784 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5786 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5789 fputc ('\n', asm_out_file
);
5790 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, text_end_label
, prev_line_label
);
5791 fputc ('\n', asm_out_file
);
5795 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5797 fprintf (asm_out_file
, "\t%s DW_LNE_set_address", ASM_COMMENT_START
);
5798 fputc ('\n', asm_out_file
);
5799 output_uleb128 (1 + PTR_SIZE
);
5800 fputc ('\n', asm_out_file
);
5801 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5802 fputc ('\n', asm_out_file
);
5803 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, text_end_label
);
5804 fputc ('\n', asm_out_file
);
5807 /* Output the marker for the end of the line number info. */
5808 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5810 fprintf (asm_out_file
, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START
);
5812 fputc ('\n', asm_out_file
);
5814 fputc ('\n', asm_out_file
);
5815 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_end_sequence
);
5816 fputc ('\n', asm_out_file
);
5821 for (lt_index
= 0; lt_index
< separate_line_info_table_in_use
; )
5823 register dw_separate_line_info_ref line_info
5824 = &separate_line_info_table
[lt_index
];
5826 /* Emit debug info for the address of the current line. If this is
5827 a new function, or the first line of a function, then we need
5828 to handle it differently. */
5829 ASM_GENERATE_INTERNAL_LABEL (line_label
, SEPARATE_LINE_CODE_LABEL
,
5831 if (function
!= line_info
->function
)
5833 function
= line_info
->function
;
5835 /* Set the address register to the first line in the function */
5836 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5838 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5841 fputc ('\n', asm_out_file
);
5842 output_uleb128 (1 + PTR_SIZE
);
5843 fputc ('\n', asm_out_file
);
5844 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5845 fputc ('\n', asm_out_file
);
5846 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5847 fputc ('\n', asm_out_file
);
5851 /* ??? See the DW_LNS_advance_pc comment above. */
5854 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5856 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5859 fputc ('\n', asm_out_file
);
5860 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
,
5862 fputc ('\n', asm_out_file
);
5866 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5868 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5870 fputc ('\n', asm_out_file
);
5871 output_uleb128 (1 + PTR_SIZE
);
5872 fputc ('\n', asm_out_file
);
5873 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5874 fputc ('\n', asm_out_file
);
5875 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5876 fputc ('\n', asm_out_file
);
5879 strcpy (prev_line_label
, line_label
);
5881 /* Emit debug info for the source file of the current line, if
5882 different from the previous line. */
5883 if (line_info
->dw_file_num
!= current_file
)
5885 current_file
= line_info
->dw_file_num
;
5886 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_set_file
);
5888 fprintf (asm_out_file
, "\t%s DW_LNS_set_file", ASM_COMMENT_START
);
5890 fputc ('\n', asm_out_file
);
5891 output_uleb128 (current_file
);
5893 fprintf (asm_out_file
, " (\"%s\")", file_table
[current_file
]);
5895 fputc ('\n', asm_out_file
);
5898 /* Emit debug info for the current line number, choosing the encoding
5899 that uses the least amount of space. */
5900 if (line_info
->dw_line_num
!= current_line
)
5902 line_offset
= line_info
->dw_line_num
- current_line
;
5903 line_delta
= line_offset
- DWARF_LINE_BASE
;
5904 current_line
= line_info
->dw_line_num
;
5905 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
5907 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5908 DWARF_LINE_OPCODE_BASE
+ line_delta
);
5910 fprintf (asm_out_file
,
5911 "\t%s line %d", ASM_COMMENT_START
, current_line
);
5913 fputc ('\n', asm_out_file
);
5917 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_advance_line
);
5919 fprintf (asm_out_file
, "\t%s advance to line %d",
5920 ASM_COMMENT_START
, current_line
);
5922 fputc ('\n', asm_out_file
);
5923 output_sleb128 (line_offset
);
5924 fputc ('\n', asm_out_file
);
5925 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_copy
);
5926 fputc ('\n', asm_out_file
);
5932 /* If we're done with a function, end its sequence. */
5933 if (lt_index
== separate_line_info_table_in_use
5934 || separate_line_info_table
[lt_index
].function
!= function
)
5939 /* Emit debug info for the address of the end of the function. */
5940 ASM_GENERATE_INTERNAL_LABEL (line_label
, FUNC_END_LABEL
, function
);
5943 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5945 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5948 fputc ('\n', asm_out_file
);
5949 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
,
5951 fputc ('\n', asm_out_file
);
5955 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5957 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5959 fputc ('\n', asm_out_file
);
5960 output_uleb128 (1 + PTR_SIZE
);
5961 fputc ('\n', asm_out_file
);
5962 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5963 fputc ('\n', asm_out_file
);
5964 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5965 fputc ('\n', asm_out_file
);
5968 /* Output the marker for the end of this sequence. */
5969 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5971 fprintf (asm_out_file
, "\t%s DW_LNE_end_sequence",
5974 fputc ('\n', asm_out_file
);
5976 fputc ('\n', asm_out_file
);
5977 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_end_sequence
);
5978 fputc ('\n', asm_out_file
);
5983 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
5984 in question represents the outermost pair of curly braces (i.e. the "body
5985 block") of a function or method.
5987 For any BLOCK node representing a "body block" of a function or method, the
5988 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
5989 represents the outermost (function) scope for the function or method (i.e.
5990 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
5991 *that* node in turn will point to the relevant FUNCTION_DECL node. */
5994 is_body_block (stmt
)
5997 if (TREE_CODE (stmt
) == BLOCK
)
5999 register tree parent
= BLOCK_SUPERCONTEXT (stmt
);
6001 if (TREE_CODE (parent
) == BLOCK
)
6003 register tree grandparent
= BLOCK_SUPERCONTEXT (parent
);
6005 if (TREE_CODE (grandparent
) == FUNCTION_DECL
)
6013 /* Given a pointer to a tree node for some base type, return a pointer to
6014 a DIE that describes the given type.
6016 This routine must only be called for GCC type nodes that correspond to
6017 Dwarf base (fundamental) types. */
6020 base_type_die (type
)
6023 register dw_die_ref base_type_result
;
6024 register char *type_name
;
6025 register enum dwarf_type encoding
;
6026 register tree name
= TYPE_NAME (type
);
6028 if (TREE_CODE (type
) == ERROR_MARK
6029 || TREE_CODE (type
) == VOID_TYPE
)
6032 if (TREE_CODE (name
) == TYPE_DECL
)
6033 name
= DECL_NAME (name
);
6034 type_name
= IDENTIFIER_POINTER (name
);
6036 switch (TREE_CODE (type
))
6039 /* Carefully distinguish the C character types, without messing
6040 up if the language is not C. Note that we check only for the names
6041 that contain spaces; other names might occur by coincidence in other
6043 if (! (TYPE_PRECISION (type
) == CHAR_TYPE_SIZE
6044 && (type
== char_type_node
6045 || ! strcmp (type_name
, "signed char")
6046 || ! strcmp (type_name
, "unsigned char"))))
6048 if (TREE_UNSIGNED (type
))
6049 encoding
= DW_ATE_unsigned
;
6051 encoding
= DW_ATE_signed
;
6054 /* else fall through */
6057 /* GNU Pascal/Ada CHAR type. Not used in C. */
6058 if (TREE_UNSIGNED (type
))
6059 encoding
= DW_ATE_unsigned_char
;
6061 encoding
= DW_ATE_signed_char
;
6065 encoding
= DW_ATE_float
;
6069 encoding
= DW_ATE_complex_float
;
6073 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6074 encoding
= DW_ATE_boolean
;
6078 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6081 base_type_result
= new_die (DW_TAG_base_type
, comp_unit_die
);
6082 add_AT_string (base_type_result
, DW_AT_name
, type_name
);
6083 add_AT_unsigned (base_type_result
, DW_AT_byte_size
,
6084 TYPE_PRECISION (type
) / BITS_PER_UNIT
);
6085 add_AT_unsigned (base_type_result
, DW_AT_encoding
, encoding
);
6087 return base_type_result
;
6090 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6091 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6092 a given type is generally the same as the given type, except that if the
6093 given type is a pointer or reference type, then the root type of the given
6094 type is the root type of the "basis" type for the pointer or reference
6095 type. (This definition of the "root" type is recursive.) Also, the root
6096 type of a `const' qualified type or a `volatile' qualified type is the
6097 root type of the given type without the qualifiers. */
6103 if (TREE_CODE (type
) == ERROR_MARK
)
6104 return error_mark_node
;
6106 switch (TREE_CODE (type
))
6109 return error_mark_node
;
6112 case REFERENCE_TYPE
:
6113 return type_main_variant (root_type (TREE_TYPE (type
)));
6116 return type_main_variant (type
);
6120 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6121 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6127 switch (TREE_CODE (type
))
6142 case QUAL_UNION_TYPE
:
6147 case REFERENCE_TYPE
:
6160 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6161 entry that chains various modifiers in front of the given type. */
6164 modified_type_die (type
, is_const_type
, is_volatile_type
, context_die
)
6166 register int is_const_type
;
6167 register int is_volatile_type
;
6168 register dw_die_ref context_die
;
6170 register enum tree_code code
= TREE_CODE (type
);
6171 register dw_die_ref mod_type_die
= NULL
;
6172 register dw_die_ref sub_die
= NULL
;
6173 register tree item_type
= NULL
;
6175 if (code
!= ERROR_MARK
)
6177 type
= build_type_variant (type
, is_const_type
, is_volatile_type
);
6179 mod_type_die
= lookup_type_die (type
);
6181 return mod_type_die
;
6183 /* Handle C typedef types. */
6184 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
6185 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
6187 tree dtype
= TREE_TYPE (TYPE_NAME (type
));
6190 /* For a named type, use the typedef. */
6191 gen_type_die (type
, context_die
);
6192 mod_type_die
= lookup_type_die (type
);
6195 else if (is_const_type
< TYPE_READONLY (dtype
)
6196 || is_volatile_type
< TYPE_VOLATILE (dtype
))
6197 /* cv-unqualified version of named type. Just use the unnamed
6198 type to which it refers. */
6200 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type
)),
6201 is_const_type
, is_volatile_type
,
6203 /* Else cv-qualified version of named type; fall through. */
6208 else if (is_const_type
)
6210 mod_type_die
= new_die (DW_TAG_const_type
, comp_unit_die
);
6211 sub_die
= modified_type_die (type
, 0, is_volatile_type
, context_die
);
6213 else if (is_volatile_type
)
6215 mod_type_die
= new_die (DW_TAG_volatile_type
, comp_unit_die
);
6216 sub_die
= modified_type_die (type
, 0, 0, context_die
);
6218 else if (code
== POINTER_TYPE
)
6220 mod_type_die
= new_die (DW_TAG_pointer_type
, comp_unit_die
);
6221 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
6223 add_AT_unsigned (mod_type_die
, DW_AT_address_class
, 0);
6225 item_type
= TREE_TYPE (type
);
6227 else if (code
== REFERENCE_TYPE
)
6229 mod_type_die
= new_die (DW_TAG_reference_type
, comp_unit_die
);
6230 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
6232 add_AT_unsigned (mod_type_die
, DW_AT_address_class
, 0);
6234 item_type
= TREE_TYPE (type
);
6236 else if (is_base_type (type
))
6237 mod_type_die
= base_type_die (type
);
6240 gen_type_die (type
, context_die
);
6242 /* We have to get the type_main_variant here (and pass that to the
6243 `lookup_type_die' routine) because the ..._TYPE node we have
6244 might simply be a *copy* of some original type node (where the
6245 copy was created to help us keep track of typedef names) and
6246 that copy might have a different TYPE_UID from the original
6248 mod_type_die
= lookup_type_die (type_main_variant (type
));
6249 if (mod_type_die
== NULL
)
6254 equate_type_number_to_die (type
, mod_type_die
);
6256 /* We must do this after the equate_type_number_to_die call, in case
6257 this is a recursive type. This ensures that the modified_type_die
6258 recursion will terminate even if the type is recursive. Recursive
6259 types are possible in Ada. */
6260 sub_die
= modified_type_die (item_type
,
6261 TYPE_READONLY (item_type
),
6262 TYPE_VOLATILE (item_type
),
6265 if (sub_die
!= NULL
)
6266 add_AT_die_ref (mod_type_die
, DW_AT_type
, sub_die
);
6268 return mod_type_die
;
6271 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6272 an enumerated type. */
6278 return TREE_CODE (type
) == ENUMERAL_TYPE
;
6281 /* Return a location descriptor that designates a machine register. */
6283 static dw_loc_descr_ref
6284 reg_loc_descriptor (rtl
)
6287 register dw_loc_descr_ref loc_result
= NULL
;
6288 register unsigned reg
= reg_number (rtl
);
6290 if (reg
>= 0 && reg
<= 31)
6291 loc_result
= new_loc_descr (DW_OP_reg0
+ reg
, 0, 0);
6293 loc_result
= new_loc_descr (DW_OP_regx
, reg
, 0);
6298 /* Return a location descriptor that designates a base+offset location. */
6300 static dw_loc_descr_ref
6301 based_loc_descr (reg
, offset
)
6305 register dw_loc_descr_ref loc_result
;
6306 /* For the "frame base", we use the frame pointer or stack pointer
6307 registers, since the RTL for local variables is relative to one of
6309 register unsigned fp_reg
= DBX_REGISTER_NUMBER (frame_pointer_needed
6310 ? HARD_FRAME_POINTER_REGNUM
6311 : STACK_POINTER_REGNUM
);
6314 loc_result
= new_loc_descr (DW_OP_fbreg
, offset
, 0);
6315 else if (reg
>= 0 && reg
<= 31)
6316 loc_result
= new_loc_descr (DW_OP_breg0
+ reg
, offset
, 0);
6318 loc_result
= new_loc_descr (DW_OP_bregx
, reg
, offset
);
6323 /* Return true if this RTL expression describes a base+offset calculation. */
6329 return (GET_CODE (rtl
) == PLUS
6330 && ((GET_CODE (XEXP (rtl
, 0)) == REG
6331 && GET_CODE (XEXP (rtl
, 1)) == CONST_INT
)));
6334 /* The following routine converts the RTL for a variable or parameter
6335 (resident in memory) into an equivalent Dwarf representation of a
6336 mechanism for getting the address of that same variable onto the top of a
6337 hypothetical "address evaluation" stack.
6339 When creating memory location descriptors, we are effectively transforming
6340 the RTL for a memory-resident object into its Dwarf postfix expression
6341 equivalent. This routine recursively descends an RTL tree, turning
6342 it into Dwarf postfix code as it goes. */
6344 static dw_loc_descr_ref
6345 mem_loc_descriptor (rtl
)
6348 dw_loc_descr_ref mem_loc_result
= NULL
;
6349 /* Note that for a dynamically sized array, the location we will generate a
6350 description of here will be the lowest numbered location which is
6351 actually within the array. That's *not* necessarily the same as the
6352 zeroth element of the array. */
6354 switch (GET_CODE (rtl
))
6357 /* The case of a subreg may arise when we have a local (register)
6358 variable or a formal (register) parameter which doesn't quite fill
6359 up an entire register. For now, just assume that it is
6360 legitimate to make the Dwarf info refer to the whole register which
6361 contains the given subreg. */
6362 rtl
= XEXP (rtl
, 0);
6364 /* ... fall through ... */
6367 /* Whenever a register number forms a part of the description of the
6368 method for calculating the (dynamic) address of a memory resident
6369 object, DWARF rules require the register number be referred to as
6370 a "base register". This distinction is not based in any way upon
6371 what category of register the hardware believes the given register
6372 belongs to. This is strictly DWARF terminology we're dealing with
6373 here. Note that in cases where the location of a memory-resident
6374 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6375 OP_CONST (0)) the actual DWARF location descriptor that we generate
6376 may just be OP_BASEREG (basereg). This may look deceptively like
6377 the object in question was allocated to a register (rather than in
6378 memory) so DWARF consumers need to be aware of the subtle
6379 distinction between OP_REG and OP_BASEREG. */
6380 mem_loc_result
= based_loc_descr (reg_number (rtl
), 0);
6384 mem_loc_result
= mem_loc_descriptor (XEXP (rtl
, 0));
6385 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_deref
, 0, 0));
6390 mem_loc_result
= new_loc_descr (DW_OP_addr
, 0, 0);
6391 mem_loc_result
->dw_loc_oprnd1
.val_class
= dw_val_class_addr
;
6392 mem_loc_result
->dw_loc_oprnd1
.v
.val_addr
= addr_to_string (rtl
);
6396 if (is_based_loc (rtl
))
6397 mem_loc_result
= based_loc_descr (reg_number (XEXP (rtl
, 0)),
6398 INTVAL (XEXP (rtl
, 1)));
6401 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 0)));
6402 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 1)));
6403 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_plus
, 0, 0));
6408 /* If a pseudo-reg is optimized away, it is possible for it to
6409 be replaced with a MEM containing a multiply. */
6410 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 0)));
6411 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 1)));
6412 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_mul
, 0, 0));
6416 mem_loc_result
= new_loc_descr (DW_OP_constu
, INTVAL (rtl
), 0);
6423 return mem_loc_result
;
6426 /* Return a descriptor that describes the concatination of two locations.
6427 This is typically a complex variable. */
6429 static dw_loc_descr_ref
6430 concat_loc_descriptor (x0
, x1
)
6431 register rtx x0
, x1
;
6433 dw_loc_descr_ref cc_loc_result
= NULL
;
6435 if (!is_pseudo_reg (x0
)
6436 && (GET_CODE (x0
) != MEM
|| !is_pseudo_reg (XEXP (x0
, 0))))
6437 add_loc_descr (&cc_loc_result
, loc_descriptor (x0
));
6438 add_loc_descr (&cc_loc_result
,
6439 new_loc_descr (DW_OP_piece
, GET_MODE_SIZE (GET_MODE (x0
)), 0));
6441 if (!is_pseudo_reg (x1
)
6442 && (GET_CODE (x1
) != MEM
|| !is_pseudo_reg (XEXP (x1
, 0))))
6443 add_loc_descr (&cc_loc_result
, loc_descriptor (x1
));
6444 add_loc_descr (&cc_loc_result
,
6445 new_loc_descr (DW_OP_piece
, GET_MODE_SIZE (GET_MODE (x1
)), 0));
6447 return cc_loc_result
;
6450 /* Output a proper Dwarf location descriptor for a variable or parameter
6451 which is either allocated in a register or in a memory location. For a
6452 register, we just generate an OP_REG and the register number. For a
6453 memory location we provide a Dwarf postfix expression describing how to
6454 generate the (dynamic) address of the object onto the address stack. */
6456 static dw_loc_descr_ref
6457 loc_descriptor (rtl
)
6460 dw_loc_descr_ref loc_result
= NULL
;
6461 switch (GET_CODE (rtl
))
6464 /* The case of a subreg may arise when we have a local (register)
6465 variable or a formal (register) parameter which doesn't quite fill
6466 up an entire register. For now, just assume that it is
6467 legitimate to make the Dwarf info refer to the whole register which
6468 contains the given subreg. */
6469 rtl
= XEXP (rtl
, 0);
6471 /* ... fall through ... */
6474 loc_result
= reg_loc_descriptor (rtl
);
6478 loc_result
= mem_loc_descriptor (XEXP (rtl
, 0));
6482 loc_result
= concat_loc_descriptor (XEXP (rtl
, 0), XEXP (rtl
, 1));
6492 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6493 which is not less than the value itself. */
6495 static inline unsigned
6496 ceiling (value
, boundary
)
6497 register unsigned value
;
6498 register unsigned boundary
;
6500 return (((value
+ boundary
- 1) / boundary
) * boundary
);
6503 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6504 pointer to the declared type for the relevant field variable, or return
6505 `integer_type_node' if the given node turns out to be an
6514 if (TREE_CODE (decl
) == ERROR_MARK
)
6515 return integer_type_node
;
6517 type
= DECL_BIT_FIELD_TYPE (decl
);
6518 if (type
== NULL_TREE
)
6519 type
= TREE_TYPE (decl
);
6524 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6525 node, return the alignment in bits for the type, or else return
6526 BITS_PER_WORD if the node actually turns out to be an
6529 static inline unsigned
6530 simple_type_align_in_bits (type
)
6533 return (TREE_CODE (type
) != ERROR_MARK
) ? TYPE_ALIGN (type
) : BITS_PER_WORD
;
6536 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6537 node, return the size in bits for the type if it is a constant, or else
6538 return the alignment for the type if the type's size is not constant, or
6539 else return BITS_PER_WORD if the type actually turns out to be an
6542 static inline unsigned
6543 simple_type_size_in_bits (type
)
6546 if (TREE_CODE (type
) == ERROR_MARK
)
6547 return BITS_PER_WORD
;
6550 register tree type_size_tree
= TYPE_SIZE (type
);
6552 if (TREE_CODE (type_size_tree
) != INTEGER_CST
)
6553 return TYPE_ALIGN (type
);
6555 return (unsigned) TREE_INT_CST_LOW (type_size_tree
);
6559 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6560 return the byte offset of the lowest addressed byte of the "containing
6561 object" for the given FIELD_DECL, or return 0 if we are unable to
6562 determine what that offset is, either because the argument turns out to
6563 be a pointer to an ERROR_MARK node, or because the offset is actually
6564 variable. (We can't handle the latter case just yet). */
6567 field_byte_offset (decl
)
6570 register unsigned type_align_in_bytes
;
6571 register unsigned type_align_in_bits
;
6572 register unsigned type_size_in_bits
;
6573 register unsigned object_offset_in_align_units
;
6574 register unsigned object_offset_in_bits
;
6575 register unsigned object_offset_in_bytes
;
6577 register tree bitpos_tree
;
6578 register tree field_size_tree
;
6579 register unsigned bitpos_int
;
6580 register unsigned deepest_bitpos
;
6581 register unsigned field_size_in_bits
;
6583 if (TREE_CODE (decl
) == ERROR_MARK
)
6586 if (TREE_CODE (decl
) != FIELD_DECL
)
6589 type
= field_type (decl
);
6591 bitpos_tree
= DECL_FIELD_BITPOS (decl
);
6592 field_size_tree
= DECL_SIZE (decl
);
6594 /* We cannot yet cope with fields whose positions or sizes are variable, so
6595 for now, when we see such things, we simply return 0. Someday, we may
6596 be able to handle such cases, but it will be damn difficult. */
6597 if (TREE_CODE (bitpos_tree
) != INTEGER_CST
)
6599 bitpos_int
= (unsigned) TREE_INT_CST_LOW (bitpos_tree
);
6601 if (TREE_CODE (field_size_tree
) != INTEGER_CST
)
6604 field_size_in_bits
= (unsigned) TREE_INT_CST_LOW (field_size_tree
);
6605 type_size_in_bits
= simple_type_size_in_bits (type
);
6606 type_align_in_bits
= simple_type_align_in_bits (type
);
6607 type_align_in_bytes
= type_align_in_bits
/ BITS_PER_UNIT
;
6609 /* Note that the GCC front-end doesn't make any attempt to keep track of
6610 the starting bit offset (relative to the start of the containing
6611 structure type) of the hypothetical "containing object" for a bit-
6612 field. Thus, when computing the byte offset value for the start of the
6613 "containing object" of a bit-field, we must deduce this information on
6614 our own. This can be rather tricky to do in some cases. For example,
6615 handling the following structure type definition when compiling for an
6616 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6619 struct S { int field1; long long field2:31; };
6621 Fortunately, there is a simple rule-of-thumb which can be
6622 used in such cases. When compiling for an i386/i486, GCC will allocate
6623 8 bytes for the structure shown above. It decides to do this based upon
6624 one simple rule for bit-field allocation. Quite simply, GCC allocates
6625 each "containing object" for each bit-field at the first (i.e. lowest
6626 addressed) legitimate alignment boundary (based upon the required
6627 minimum alignment for the declared type of the field) which it can
6628 possibly use, subject to the condition that there is still enough
6629 available space remaining in the containing object (when allocated at
6630 the selected point) to fully accommodate all of the bits of the
6631 bit-field itself. This simple rule makes it obvious why GCC allocates
6632 8 bytes for each object of the structure type shown above. When looking
6633 for a place to allocate the "containing object" for `field2', the
6634 compiler simply tries to allocate a 64-bit "containing object" at each
6635 successive 32-bit boundary (starting at zero) until it finds a place to
6636 allocate that 64- bit field such that at least 31 contiguous (and
6637 previously unallocated) bits remain within that selected 64 bit field.
6638 (As it turns out, for the example above, the compiler finds that it is
6639 OK to allocate the "containing object" 64-bit field at bit-offset zero
6640 within the structure type.) Here we attempt to work backwards from the
6641 limited set of facts we're given, and we try to deduce from those facts,
6642 where GCC must have believed that the containing object started (within
6643 the structure type). The value we deduce is then used (by the callers of
6644 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6645 for fields (both bit-fields and, in the case of DW_AT_location, regular
6648 /* Figure out the bit-distance from the start of the structure to the
6649 "deepest" bit of the bit-field. */
6650 deepest_bitpos
= bitpos_int
+ field_size_in_bits
;
6652 /* This is the tricky part. Use some fancy footwork to deduce where the
6653 lowest addressed bit of the containing object must be. */
6654 object_offset_in_bits
6655 = ceiling (deepest_bitpos
, type_align_in_bits
) - type_size_in_bits
;
6657 /* Compute the offset of the containing object in "alignment units". */
6658 object_offset_in_align_units
= object_offset_in_bits
/ type_align_in_bits
;
6660 /* Compute the offset of the containing object in bytes. */
6661 object_offset_in_bytes
= object_offset_in_align_units
* type_align_in_bytes
;
6663 return object_offset_in_bytes
;
6666 /* The following routines define various Dwarf attributes and any data
6667 associated with them. */
6669 /* Add a location description attribute value to a DIE.
6671 This emits location attributes suitable for whole variables and
6672 whole parameters. Note that the location attributes for struct fields are
6673 generated by the routine `data_member_location_attribute' below. */
6676 add_AT_location_description (die
, attr_kind
, rtl
)
6678 enum dwarf_attribute attr_kind
;
6681 /* Handle a special case. If we are about to output a location descriptor
6682 for a variable or parameter which has been optimized out of existence,
6683 don't do that. A variable which has been optimized out
6684 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6685 Currently, in some rare cases, variables can have DECL_RTL values which
6686 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6687 elsewhere in the compiler. We treat such cases as if the variable(s) in
6688 question had been optimized out of existence. */
6690 if (is_pseudo_reg (rtl
)
6691 || (GET_CODE (rtl
) == MEM
6692 && is_pseudo_reg (XEXP (rtl
, 0)))
6693 || (GET_CODE (rtl
) == CONCAT
6694 && is_pseudo_reg (XEXP (rtl
, 0))
6695 && is_pseudo_reg (XEXP (rtl
, 1))))
6698 add_AT_loc (die
, attr_kind
, loc_descriptor (rtl
));
6701 /* Attach the specialized form of location attribute used for data
6702 members of struct and union types. In the special case of a
6703 FIELD_DECL node which represents a bit-field, the "offset" part
6704 of this special location descriptor must indicate the distance
6705 in bytes from the lowest-addressed byte of the containing struct
6706 or union type to the lowest-addressed byte of the "containing
6707 object" for the bit-field. (See the `field_byte_offset' function
6708 above).. For any given bit-field, the "containing object" is a
6709 hypothetical object (of some integral or enum type) within which
6710 the given bit-field lives. The type of this hypothetical
6711 "containing object" is always the same as the declared type of
6712 the individual bit-field itself (for GCC anyway... the DWARF
6713 spec doesn't actually mandate this). Note that it is the size
6714 (in bytes) of the hypothetical "containing object" which will
6715 be given in the DW_AT_byte_size attribute for this bit-field.
6716 (See the `byte_size_attribute' function below.) It is also used
6717 when calculating the value of the DW_AT_bit_offset attribute.
6718 (See the `bit_offset_attribute' function below). */
6721 add_data_member_location_attribute (die
, decl
)
6722 register dw_die_ref die
;
6725 register unsigned long offset
;
6726 register dw_loc_descr_ref loc_descr
;
6727 register enum dwarf_location_atom op
;
6729 if (TREE_CODE (decl
) == TREE_VEC
)
6730 offset
= TREE_INT_CST_LOW (BINFO_OFFSET (decl
));
6732 offset
= field_byte_offset (decl
);
6734 /* The DWARF2 standard says that we should assume that the structure address
6735 is already on the stack, so we can specify a structure field address
6736 by using DW_OP_plus_uconst. */
6738 #ifdef MIPS_DEBUGGING_INFO
6739 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6740 correctly. It works only if we leave the offset on the stack. */
6743 op
= DW_OP_plus_uconst
;
6746 loc_descr
= new_loc_descr (op
, offset
, 0);
6747 add_AT_loc (die
, DW_AT_data_member_location
, loc_descr
);
6750 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6751 does not have a "location" either in memory or in a register. These
6752 things can arise in GNU C when a constant is passed as an actual parameter
6753 to an inlined function. They can also arise in C++ where declared
6754 constants do not necessarily get memory "homes". */
6757 add_const_value_attribute (die
, rtl
)
6758 register dw_die_ref die
;
6761 switch (GET_CODE (rtl
))
6764 /* Note that a CONST_INT rtx could represent either an integer or a
6765 floating-point constant. A CONST_INT is used whenever the constant
6766 will fit into a single word. In all such cases, the original mode
6767 of the constant value is wiped out, and the CONST_INT rtx is
6768 assigned VOIDmode. */
6769 add_AT_unsigned (die
, DW_AT_const_value
, (unsigned) INTVAL (rtl
));
6773 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6774 floating-point constant. A CONST_DOUBLE is used whenever the
6775 constant requires more than one word in order to be adequately
6776 represented. We output CONST_DOUBLEs as blocks. */
6778 register enum machine_mode mode
= GET_MODE (rtl
);
6780 if (GET_MODE_CLASS (mode
) == MODE_FLOAT
)
6782 register unsigned length
= GET_MODE_SIZE (mode
) / sizeof (long);
6786 REAL_VALUE_FROM_CONST_DOUBLE (rv
, rtl
);
6790 REAL_VALUE_TO_TARGET_SINGLE (rv
, array
[0]);
6794 REAL_VALUE_TO_TARGET_DOUBLE (rv
, array
);
6799 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv
, array
);
6806 add_AT_float (die
, DW_AT_const_value
, length
, array
);
6809 add_AT_long_long (die
, DW_AT_const_value
,
6810 CONST_DOUBLE_HIGH (rtl
), CONST_DOUBLE_LOW (rtl
));
6815 add_AT_string (die
, DW_AT_const_value
, XSTR (rtl
, 0));
6821 add_AT_addr (die
, DW_AT_const_value
, addr_to_string (rtl
));
6825 /* In cases where an inlined instance of an inline function is passed
6826 the address of an `auto' variable (which is local to the caller) we
6827 can get a situation where the DECL_RTL of the artificial local
6828 variable (for the inlining) which acts as a stand-in for the
6829 corresponding formal parameter (of the inline function) will look
6830 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6831 exactly a compile-time constant expression, but it isn't the address
6832 of the (artificial) local variable either. Rather, it represents the
6833 *value* which the artificial local variable always has during its
6834 lifetime. We currently have no way to represent such quasi-constant
6835 values in Dwarf, so for now we just punt and generate nothing. */
6839 /* No other kinds of rtx should be possible here. */
6845 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6846 data attribute for a variable or a parameter. We generate the
6847 DW_AT_const_value attribute only in those cases where the given variable
6848 or parameter does not have a true "location" either in memory or in a
6849 register. This can happen (for example) when a constant is passed as an
6850 actual argument in a call to an inline function. (It's possible that
6851 these things can crop up in other ways also.) Note that one type of
6852 constant value which can be passed into an inlined function is a constant
6853 pointer. This can happen for example if an actual argument in an inlined
6854 function call evaluates to a compile-time constant address. */
6857 add_location_or_const_value_attribute (die
, decl
)
6858 register dw_die_ref die
;
6862 register tree declared_type
;
6863 register tree passed_type
;
6865 if (TREE_CODE (decl
) == ERROR_MARK
)
6868 if (TREE_CODE (decl
) != VAR_DECL
&& TREE_CODE (decl
) != PARM_DECL
)
6871 /* Here we have to decide where we are going to say the parameter "lives"
6872 (as far as the debugger is concerned). We only have a couple of
6873 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6875 DECL_RTL normally indicates where the parameter lives during most of the
6876 activation of the function. If optimization is enabled however, this
6877 could be either NULL or else a pseudo-reg. Both of those cases indicate
6878 that the parameter doesn't really live anywhere (as far as the code
6879 generation parts of GCC are concerned) during most of the function's
6880 activation. That will happen (for example) if the parameter is never
6881 referenced within the function.
6883 We could just generate a location descriptor here for all non-NULL
6884 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6885 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6886 where DECL_RTL is NULL or is a pseudo-reg.
6888 Note however that we can only get away with using DECL_INCOMING_RTL as
6889 a backup substitute for DECL_RTL in certain limited cases. In cases
6890 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
6891 we can be sure that the parameter was passed using the same type as it is
6892 declared to have within the function, and that its DECL_INCOMING_RTL
6893 points us to a place where a value of that type is passed.
6895 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
6896 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
6897 because in these cases DECL_INCOMING_RTL points us to a value of some
6898 type which is *different* from the type of the parameter itself. Thus,
6899 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
6900 such cases, the debugger would end up (for example) trying to fetch a
6901 `float' from a place which actually contains the first part of a
6902 `double'. That would lead to really incorrect and confusing
6903 output at debug-time.
6905 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
6906 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
6907 are a couple of exceptions however. On little-endian machines we can
6908 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
6909 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
6910 an integral type that is smaller than TREE_TYPE (decl). These cases arise
6911 when (on a little-endian machine) a non-prototyped function has a
6912 parameter declared to be of type `short' or `char'. In such cases,
6913 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
6914 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
6915 passed `int' value. If the debugger then uses that address to fetch
6916 a `short' or a `char' (on a little-endian machine) the result will be
6917 the correct data, so we allow for such exceptional cases below.
6919 Note that our goal here is to describe the place where the given formal
6920 parameter lives during most of the function's activation (i.e. between
6921 the end of the prologue and the start of the epilogue). We'll do that
6922 as best as we can. Note however that if the given formal parameter is
6923 modified sometime during the execution of the function, then a stack
6924 backtrace (at debug-time) will show the function as having been
6925 called with the *new* value rather than the value which was
6926 originally passed in. This happens rarely enough that it is not
6927 a major problem, but it *is* a problem, and I'd like to fix it.
6929 A future version of dwarf2out.c may generate two additional
6930 attributes for any given DW_TAG_formal_parameter DIE which will
6931 describe the "passed type" and the "passed location" for the
6932 given formal parameter in addition to the attributes we now
6933 generate to indicate the "declared type" and the "active
6934 location" for each parameter. This additional set of attributes
6935 could be used by debuggers for stack backtraces. Separately, note
6936 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
6937 NULL also. This happens (for example) for inlined-instances of
6938 inline function formal parameters which are never referenced.
6939 This really shouldn't be happening. All PARM_DECL nodes should
6940 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
6941 doesn't currently generate these values for inlined instances of
6942 inline function parameters, so when we see such cases, we are
6943 just SOL (shit-out-of-luck) for the time being (until integrate.c
6946 /* Use DECL_RTL as the "location" unless we find something better. */
6947 rtl
= DECL_RTL (decl
);
6949 if (TREE_CODE (decl
) == PARM_DECL
)
6951 if (rtl
== NULL_RTX
|| is_pseudo_reg (rtl
))
6953 declared_type
= type_main_variant (TREE_TYPE (decl
));
6954 passed_type
= type_main_variant (DECL_ARG_TYPE (decl
));
6956 /* This decl represents a formal parameter which was optimized out.
6957 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
6958 all* cases where (rtl == NULL_RTX) just below. */
6959 if (declared_type
== passed_type
)
6960 rtl
= DECL_INCOMING_RTL (decl
);
6961 else if (! BYTES_BIG_ENDIAN
6962 && TREE_CODE (declared_type
) == INTEGER_TYPE
6963 && TYPE_SIZE (declared_type
) <= TYPE_SIZE (passed_type
))
6964 rtl
= DECL_INCOMING_RTL (decl
);
6968 if (rtl
== NULL_RTX
)
6971 rtl
= eliminate_regs (rtl
, 0, NULL_RTX
, 0);
6972 #ifdef LEAF_REG_REMAP
6974 leaf_renumber_regs_insn (rtl
);
6977 switch (GET_CODE (rtl
))
6980 /* The address of a variable that was optimized away; don't emit
6991 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
6992 add_const_value_attribute (die
, rtl
);
6999 add_AT_location_description (die
, DW_AT_location
, rtl
);
7007 /* Generate an DW_AT_name attribute given some string value to be included as
7008 the value of the attribute. */
7011 add_name_attribute (die
, name_string
)
7012 register dw_die_ref die
;
7013 register char *name_string
;
7015 if (name_string
!= NULL
&& *name_string
!= 0)
7016 add_AT_string (die
, DW_AT_name
, name_string
);
7019 /* Given a tree node describing an array bound (either lower or upper) output
7020 a representation for that bound. */
7023 add_bound_info (subrange_die
, bound_attr
, bound
)
7024 register dw_die_ref subrange_die
;
7025 register enum dwarf_attribute bound_attr
;
7026 register tree bound
;
7028 register unsigned bound_value
= 0;
7030 /* If this is an Ada unconstrained array type, then don't emit any debug
7031 info because the array bounds are unknown. They are parameterized when
7032 the type is instantiated. */
7033 if (contains_placeholder_p (bound
))
7036 switch (TREE_CODE (bound
))
7041 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7043 bound_value
= TREE_INT_CST_LOW (bound
);
7044 if (bound_attr
== DW_AT_lower_bound
7045 && ((is_c_family () && bound_value
== 0)
7046 || (is_fortran () && bound_value
== 1)))
7047 /* use the default */;
7049 add_AT_unsigned (subrange_die
, bound_attr
, bound_value
);
7054 case NON_LVALUE_EXPR
:
7055 add_bound_info (subrange_die
, bound_attr
, TREE_OPERAND (bound
, 0));
7059 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7060 access the upper bound values may be bogus. If they refer to a
7061 register, they may only describe how to get at these values at the
7062 points in the generated code right after they have just been
7063 computed. Worse yet, in the typical case, the upper bound values
7064 will not even *be* computed in the optimized code (though the
7065 number of elements will), so these SAVE_EXPRs are entirely
7066 bogus. In order to compensate for this fact, we check here to see
7067 if optimization is enabled, and if so, we don't add an attribute
7068 for the (unknown and unknowable) upper bound. This should not
7069 cause too much trouble for existing (stupid?) debuggers because
7070 they have to deal with empty upper bounds location descriptions
7071 anyway in order to be able to deal with incomplete array types.
7072 Of course an intelligent debugger (GDB?) should be able to
7073 comprehend that a missing upper bound specification in a array
7074 type used for a storage class `auto' local array variable
7075 indicates that the upper bound is both unknown (at compile- time)
7076 and unknowable (at run-time) due to optimization.
7078 We assume that a MEM rtx is safe because gcc wouldn't put the
7079 value there unless it was going to be used repeatedly in the
7080 function, i.e. for cleanups. */
7081 if (! optimize
|| GET_CODE (SAVE_EXPR_RTL (bound
)) == MEM
)
7083 register dw_die_ref ctx
= lookup_decl_die (current_function_decl
);
7084 register dw_die_ref decl_die
= new_die (DW_TAG_variable
, ctx
);
7085 add_AT_flag (decl_die
, DW_AT_artificial
, 1);
7086 add_type_attribute (decl_die
, TREE_TYPE (bound
), 1, 0, ctx
);
7087 add_AT_location_description (decl_die
, DW_AT_location
,
7088 SAVE_EXPR_RTL (bound
));
7089 add_AT_die_ref (subrange_die
, bound_attr
, decl_die
);
7092 /* Else leave out the attribute. */
7097 /* ??? These types of bounds can be created by the Ada front end,
7098 and it isn't clear how to emit debug info for them. */
7106 /* Note that the block of subscript information for an array type also
7107 includes information about the element type of type given array type. */
7110 add_subscript_info (type_die
, type
)
7111 register dw_die_ref type_die
;
7114 register unsigned dimension_number
;
7115 register tree lower
, upper
;
7116 register dw_die_ref subrange_die
;
7118 /* The GNU compilers represent multidimensional array types as sequences of
7119 one dimensional array types whose element types are themselves array
7120 types. Here we squish that down, so that each multidimensional array
7121 type gets only one array_type DIE in the Dwarf debugging info. The draft
7122 Dwarf specification say that we are allowed to do this kind of
7123 compression in C (because there is no difference between an array or
7124 arrays and a multidimensional array in C) but for other source languages
7125 (e.g. Ada) we probably shouldn't do this. */
7127 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7128 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7129 We work around this by disabling this feature. See also
7130 gen_array_type_die. */
7131 #ifndef MIPS_DEBUGGING_INFO
7132 for (dimension_number
= 0;
7133 TREE_CODE (type
) == ARRAY_TYPE
;
7134 type
= TREE_TYPE (type
), dimension_number
++)
7137 register tree domain
= TYPE_DOMAIN (type
);
7139 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7140 and (in GNU C only) variable bounds. Handle all three forms
7142 subrange_die
= new_die (DW_TAG_subrange_type
, type_die
);
7145 /* We have an array type with specified bounds. */
7146 lower
= TYPE_MIN_VALUE (domain
);
7147 upper
= TYPE_MAX_VALUE (domain
);
7149 /* define the index type. */
7150 if (TREE_TYPE (domain
))
7152 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7153 TREE_TYPE field. We can't emit debug info for this
7154 because it is an unnamed integral type. */
7155 if (TREE_CODE (domain
) == INTEGER_TYPE
7156 && TYPE_NAME (domain
) == NULL_TREE
7157 && TREE_CODE (TREE_TYPE (domain
)) == INTEGER_TYPE
7158 && TYPE_NAME (TREE_TYPE (domain
)) == NULL_TREE
)
7161 add_type_attribute (subrange_die
, TREE_TYPE (domain
), 0, 0,
7165 add_bound_info (subrange_die
, DW_AT_lower_bound
, lower
);
7166 add_bound_info (subrange_die
, DW_AT_upper_bound
, upper
);
7169 /* We have an array type with an unspecified length. The DWARF-2
7170 spec does not say how to handle this; let's just leave out the
7174 #ifndef MIPS_DEBUGGING_INFO
7180 add_byte_size_attribute (die
, tree_node
)
7182 register tree tree_node
;
7184 register unsigned size
;
7186 switch (TREE_CODE (tree_node
))
7194 case QUAL_UNION_TYPE
:
7195 size
= int_size_in_bytes (tree_node
);
7198 /* For a data member of a struct or union, the DW_AT_byte_size is
7199 generally given as the number of bytes normally allocated for an
7200 object of the *declared* type of the member itself. This is true
7201 even for bit-fields. */
7202 size
= simple_type_size_in_bits (field_type (tree_node
)) / BITS_PER_UNIT
;
7208 /* Note that `size' might be -1 when we get to this point. If it is, that
7209 indicates that the byte size of the entity in question is variable. We
7210 have no good way of expressing this fact in Dwarf at the present time,
7211 so just let the -1 pass on through. */
7213 add_AT_unsigned (die
, DW_AT_byte_size
, size
);
7216 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7217 which specifies the distance in bits from the highest order bit of the
7218 "containing object" for the bit-field to the highest order bit of the
7221 For any given bit-field, the "containing object" is a hypothetical
7222 object (of some integral or enum type) within which the given bit-field
7223 lives. The type of this hypothetical "containing object" is always the
7224 same as the declared type of the individual bit-field itself. The
7225 determination of the exact location of the "containing object" for a
7226 bit-field is rather complicated. It's handled by the
7227 `field_byte_offset' function (above).
7229 Note that it is the size (in bytes) of the hypothetical "containing object"
7230 which will be given in the DW_AT_byte_size attribute for this bit-field.
7231 (See `byte_size_attribute' above). */
7234 add_bit_offset_attribute (die
, decl
)
7235 register dw_die_ref die
;
7238 register unsigned object_offset_in_bytes
= field_byte_offset (decl
);
7239 register tree type
= DECL_BIT_FIELD_TYPE (decl
);
7240 register tree bitpos_tree
= DECL_FIELD_BITPOS (decl
);
7241 register unsigned bitpos_int
;
7242 register unsigned highest_order_object_bit_offset
;
7243 register unsigned highest_order_field_bit_offset
;
7244 register unsigned bit_offset
;
7246 /* Must be a field and a bit field. */
7248 || TREE_CODE (decl
) != FIELD_DECL
)
7251 /* We can't yet handle bit-fields whose offsets are variable, so if we
7252 encounter such things, just return without generating any attribute
7254 if (TREE_CODE (bitpos_tree
) != INTEGER_CST
)
7257 bitpos_int
= (unsigned) TREE_INT_CST_LOW (bitpos_tree
);
7259 /* Note that the bit offset is always the distance (in bits) from the
7260 highest-order bit of the "containing object" to the highest-order bit of
7261 the bit-field itself. Since the "high-order end" of any object or field
7262 is different on big-endian and little-endian machines, the computation
7263 below must take account of these differences. */
7264 highest_order_object_bit_offset
= object_offset_in_bytes
* BITS_PER_UNIT
;
7265 highest_order_field_bit_offset
= bitpos_int
;
7267 if (! BYTES_BIG_ENDIAN
)
7269 highest_order_field_bit_offset
7270 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl
));
7272 highest_order_object_bit_offset
+= simple_type_size_in_bits (type
);
7276 = (! BYTES_BIG_ENDIAN
7277 ? highest_order_object_bit_offset
- highest_order_field_bit_offset
7278 : highest_order_field_bit_offset
- highest_order_object_bit_offset
);
7280 add_AT_unsigned (die
, DW_AT_bit_offset
, bit_offset
);
7283 /* For a FIELD_DECL node which represents a bit field, output an attribute
7284 which specifies the length in bits of the given field. */
7287 add_bit_size_attribute (die
, decl
)
7288 register dw_die_ref die
;
7291 /* Must be a field and a bit field. */
7292 if (TREE_CODE (decl
) != FIELD_DECL
7293 || ! DECL_BIT_FIELD_TYPE (decl
))
7295 add_AT_unsigned (die
, DW_AT_bit_size
,
7296 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl
)));
7299 /* If the compiled language is ANSI C, then add a 'prototyped'
7300 attribute, if arg types are given for the parameters of a function. */
7303 add_prototyped_attribute (die
, func_type
)
7304 register dw_die_ref die
;
7305 register tree func_type
;
7307 if (get_AT_unsigned (comp_unit_die
, DW_AT_language
) == DW_LANG_C89
7308 && TYPE_ARG_TYPES (func_type
) != NULL
)
7309 add_AT_flag (die
, DW_AT_prototyped
, 1);
7313 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7314 by looking in either the type declaration or object declaration
7318 add_abstract_origin_attribute (die
, origin
)
7319 register dw_die_ref die
;
7320 register tree origin
;
7322 dw_die_ref origin_die
= NULL
;
7323 if (TREE_CODE_CLASS (TREE_CODE (origin
)) == 'd')
7324 origin_die
= lookup_decl_die (origin
);
7325 else if (TREE_CODE_CLASS (TREE_CODE (origin
)) == 't')
7326 origin_die
= lookup_type_die (origin
);
7328 add_AT_die_ref (die
, DW_AT_abstract_origin
, origin_die
);
7331 /* We do not currently support the pure_virtual attribute. */
7334 add_pure_or_virtual_attribute (die
, func_decl
)
7335 register dw_die_ref die
;
7336 register tree func_decl
;
7338 if (DECL_VINDEX (func_decl
))
7340 add_AT_unsigned (die
, DW_AT_virtuality
, DW_VIRTUALITY_virtual
);
7341 add_AT_loc (die
, DW_AT_vtable_elem_location
,
7342 new_loc_descr (DW_OP_constu
,
7343 TREE_INT_CST_LOW (DECL_VINDEX (func_decl
)),
7346 /* GNU extension: Record what type this method came from originally. */
7347 if (debug_info_level
> DINFO_LEVEL_TERSE
)
7348 add_AT_die_ref (die
, DW_AT_containing_type
,
7349 lookup_type_die (DECL_CONTEXT (func_decl
)));
7353 /* Add source coordinate attributes for the given decl. */
7356 add_src_coords_attributes (die
, decl
)
7357 register dw_die_ref die
;
7360 register unsigned file_index
= lookup_filename (DECL_SOURCE_FILE (decl
));
7362 add_AT_unsigned (die
, DW_AT_decl_file
, file_index
);
7363 add_AT_unsigned (die
, DW_AT_decl_line
, DECL_SOURCE_LINE (decl
));
7366 /* Add an DW_AT_name attribute and source coordinate attribute for the
7367 given decl, but only if it actually has a name. */
7370 add_name_and_src_coords_attributes (die
, decl
)
7371 register dw_die_ref die
;
7374 register tree decl_name
;
7376 decl_name
= DECL_NAME (decl
);
7377 if (decl_name
!= NULL
&& IDENTIFIER_POINTER (decl_name
) != NULL
)
7379 add_name_attribute (die
, dwarf2_name (decl
, 0));
7380 add_src_coords_attributes (die
, decl
);
7381 if ((TREE_CODE (decl
) == FUNCTION_DECL
|| TREE_CODE (decl
) == VAR_DECL
)
7382 && DECL_ASSEMBLER_NAME (decl
) != DECL_NAME (decl
))
7383 add_AT_string (die
, DW_AT_MIPS_linkage_name
,
7384 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)));
7388 /* Push a new declaration scope. */
7391 push_decl_scope (scope
)
7394 /* Make room in the decl_scope_table, if necessary. */
7395 if (decl_scope_table_allocated
== decl_scope_depth
)
7397 decl_scope_table_allocated
+= DECL_SCOPE_TABLE_INCREMENT
;
7399 = (tree
*) xrealloc (decl_scope_table
,
7400 decl_scope_table_allocated
* sizeof (tree
));
7403 decl_scope_table
[decl_scope_depth
++] = scope
;
7406 /* Return the DIE for the scope the immediately contains this declaration. */
7409 scope_die_for (t
, context_die
)
7411 register dw_die_ref context_die
;
7413 register dw_die_ref scope_die
= NULL
;
7414 register tree containing_scope
;
7415 register unsigned long i
;
7417 /* Walk back up the declaration tree looking for a place to define
7419 if (TREE_CODE_CLASS (TREE_CODE (t
)) == 't')
7420 containing_scope
= TYPE_CONTEXT (t
);
7421 else if (TREE_CODE (t
) == FUNCTION_DECL
&& DECL_VINDEX (t
))
7422 containing_scope
= decl_class_context (t
);
7424 containing_scope
= DECL_CONTEXT (t
);
7426 /* Function-local tags and functions get stuck in limbo until they are
7427 fixed up by decls_for_scope. */
7428 if (context_die
== NULL
&& containing_scope
!= NULL_TREE
7429 && (TREE_CODE (t
) == FUNCTION_DECL
|| is_tagged_type (t
)))
7432 if (containing_scope
== NULL_TREE
)
7433 scope_die
= comp_unit_die
;
7436 for (i
= decl_scope_depth
, scope_die
= context_die
;
7437 i
> 0 && decl_scope_table
[i
- 1] != containing_scope
;
7438 scope_die
= scope_die
->die_parent
, --i
)
7443 if (scope_die
!= comp_unit_die
7444 || TREE_CODE_CLASS (TREE_CODE (containing_scope
)) != 't')
7446 if (debug_info_level
> DINFO_LEVEL_TERSE
7447 && !TREE_ASM_WRITTEN (containing_scope
))
7455 /* Pop a declaration scope. */
7459 if (decl_scope_depth
<= 0)
7464 /* Many forms of DIEs require a "type description" attribute. This
7465 routine locates the proper "type descriptor" die for the type given
7466 by 'type', and adds an DW_AT_type attribute below the given die. */
7469 add_type_attribute (object_die
, type
, decl_const
, decl_volatile
, context_die
)
7470 register dw_die_ref object_die
;
7472 register int decl_const
;
7473 register int decl_volatile
;
7474 register dw_die_ref context_die
;
7476 register enum tree_code code
= TREE_CODE (type
);
7477 register dw_die_ref type_die
= NULL
;
7479 /* ??? If this type is an unnamed subrange type of an integral or
7480 floating-point type, use the inner type. This is because we have no
7481 support for unnamed types in base_type_die. This can happen if this is
7482 an Ada subrange type. Correct solution is emit a subrange type die. */
7483 if ((code
== INTEGER_TYPE
|| code
== REAL_TYPE
)
7484 && TREE_TYPE (type
) != 0 && TYPE_NAME (type
) == 0)
7485 type
= TREE_TYPE (type
), code
= TREE_CODE (type
);
7487 if (code
== ERROR_MARK
)
7490 /* Handle a special case. For functions whose return type is void, we
7491 generate *no* type attribute. (Note that no object may have type
7492 `void', so this only applies to function return types). */
7493 if (code
== VOID_TYPE
)
7496 type_die
= modified_type_die (type
,
7497 decl_const
|| TYPE_READONLY (type
),
7498 decl_volatile
|| TYPE_VOLATILE (type
),
7500 if (type_die
!= NULL
)
7501 add_AT_die_ref (object_die
, DW_AT_type
, type_die
);
7504 /* Given a tree pointer to a struct, class, union, or enum type node, return
7505 a pointer to the (string) tag name for the given type, or zero if the type
7506 was declared without a tag. */
7512 register char *name
= 0;
7514 if (TYPE_NAME (type
) != 0)
7516 register tree t
= 0;
7518 /* Find the IDENTIFIER_NODE for the type name. */
7519 if (TREE_CODE (TYPE_NAME (type
)) == IDENTIFIER_NODE
)
7520 t
= TYPE_NAME (type
);
7522 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7523 a TYPE_DECL node, regardless of whether or not a `typedef' was
7525 else if (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7526 && ! DECL_IGNORED_P (TYPE_NAME (type
)))
7527 t
= DECL_NAME (TYPE_NAME (type
));
7529 /* Now get the name as a string, or invent one. */
7531 name
= IDENTIFIER_POINTER (t
);
7534 return (name
== 0 || *name
== '\0') ? 0 : name
;
7537 /* Return the type associated with a data member, make a special check
7538 for bit field types. */
7541 member_declared_type (member
)
7542 register tree member
;
7544 return (DECL_BIT_FIELD_TYPE (member
)
7545 ? DECL_BIT_FIELD_TYPE (member
)
7546 : TREE_TYPE (member
));
7549 /* Get the decl's label, as described by its RTL. This may be different
7550 from the DECL_NAME name used in the source file. */
7553 decl_start_label (decl
)
7558 x
= DECL_RTL (decl
);
7559 if (GET_CODE (x
) != MEM
)
7563 if (GET_CODE (x
) != SYMBOL_REF
)
7566 fnname
= XSTR (x
, 0);
7570 /* These routines generate the internnal representation of the DIE's for
7571 the compilation unit. Debugging information is collected by walking
7572 the declaration trees passed in from dwarf2out_decl(). */
7575 gen_array_type_die (type
, context_die
)
7577 register dw_die_ref context_die
;
7579 register dw_die_ref scope_die
= scope_die_for (type
, context_die
);
7580 register dw_die_ref array_die
;
7581 register tree element_type
;
7583 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7584 the inner array type comes before the outer array type. Thus we must
7585 call gen_type_die before we call new_die. See below also. */
7586 #ifdef MIPS_DEBUGGING_INFO
7587 gen_type_die (TREE_TYPE (type
), context_die
);
7590 array_die
= new_die (DW_TAG_array_type
, scope_die
);
7593 /* We default the array ordering. SDB will probably do
7594 the right things even if DW_AT_ordering is not present. It's not even
7595 an issue until we start to get into multidimensional arrays anyway. If
7596 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7597 then we'll have to put the DW_AT_ordering attribute back in. (But if
7598 and when we find out that we need to put these in, we will only do so
7599 for multidimensional arrays. */
7600 add_AT_unsigned (array_die
, DW_AT_ordering
, DW_ORD_row_major
);
7603 #ifdef MIPS_DEBUGGING_INFO
7604 /* The SGI compilers handle arrays of unknown bound by setting
7605 AT_declaration and not emitting any subrange DIEs. */
7606 if (! TYPE_DOMAIN (type
))
7607 add_AT_unsigned (array_die
, DW_AT_declaration
, 1);
7610 add_subscript_info (array_die
, type
);
7612 equate_type_number_to_die (type
, array_die
);
7614 /* Add representation of the type of the elements of this array type. */
7615 element_type
= TREE_TYPE (type
);
7617 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7618 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7619 We work around this by disabling this feature. See also
7620 add_subscript_info. */
7621 #ifndef MIPS_DEBUGGING_INFO
7622 while (TREE_CODE (element_type
) == ARRAY_TYPE
)
7623 element_type
= TREE_TYPE (element_type
);
7625 gen_type_die (element_type
, context_die
);
7628 add_type_attribute (array_die
, element_type
, 0, 0, context_die
);
7632 gen_set_type_die (type
, context_die
)
7634 register dw_die_ref context_die
;
7636 register dw_die_ref type_die
7637 = new_die (DW_TAG_set_type
, scope_die_for (type
, context_die
));
7639 equate_type_number_to_die (type
, type_die
);
7640 add_type_attribute (type_die
, TREE_TYPE (type
), 0, 0, context_die
);
7644 gen_entry_point_die (decl
, context_die
)
7646 register dw_die_ref context_die
;
7648 register tree origin
= decl_ultimate_origin (decl
);
7649 register dw_die_ref decl_die
= new_die (DW_TAG_entry_point
, context_die
);
7651 add_abstract_origin_attribute (decl_die
, origin
);
7654 add_name_and_src_coords_attributes (decl_die
, decl
);
7655 add_type_attribute (decl_die
, TREE_TYPE (TREE_TYPE (decl
)),
7659 if (DECL_ABSTRACT (decl
))
7660 equate_decl_number_to_die (decl
, decl_die
);
7662 add_AT_lbl_id (decl_die
, DW_AT_low_pc
, decl_start_label (decl
));
7665 /* Remember a type in the pending_types_list. */
7671 if (pending_types
== pending_types_allocated
)
7673 pending_types_allocated
+= PENDING_TYPES_INCREMENT
;
7675 = (tree
*) xrealloc (pending_types_list
,
7676 sizeof (tree
) * pending_types_allocated
);
7679 pending_types_list
[pending_types
++] = type
;
7682 /* Output any pending types (from the pending_types list) which we can output
7683 now (taking into account the scope that we are working on now).
7685 For each type output, remove the given type from the pending_types_list
7686 *before* we try to output it. */
7689 output_pending_types_for_scope (context_die
)
7690 register dw_die_ref context_die
;
7694 while (pending_types
)
7697 type
= pending_types_list
[pending_types
];
7698 gen_type_die (type
, context_die
);
7699 if (!TREE_ASM_WRITTEN (type
))
7704 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7707 gen_inlined_enumeration_type_die (type
, context_die
)
7709 register dw_die_ref context_die
;
7711 register dw_die_ref type_die
= new_die (DW_TAG_enumeration_type
,
7712 scope_die_for (type
, context_die
));
7714 if (!TREE_ASM_WRITTEN (type
))
7716 add_abstract_origin_attribute (type_die
, type
);
7719 /* Generate a DIE to represent an inlined instance of a structure type. */
7722 gen_inlined_structure_type_die (type
, context_die
)
7724 register dw_die_ref context_die
;
7726 register dw_die_ref type_die
= new_die (DW_TAG_structure_type
,
7727 scope_die_for (type
, context_die
));
7729 if (!TREE_ASM_WRITTEN (type
))
7731 add_abstract_origin_attribute (type_die
, type
);
7734 /* Generate a DIE to represent an inlined instance of a union type. */
7737 gen_inlined_union_type_die (type
, context_die
)
7739 register dw_die_ref context_die
;
7741 register dw_die_ref type_die
= new_die (DW_TAG_union_type
,
7742 scope_die_for (type
, context_die
));
7744 if (!TREE_ASM_WRITTEN (type
))
7746 add_abstract_origin_attribute (type_die
, type
);
7749 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7750 include all of the information about the enumeration values also. Each
7751 enumerated type name/value is listed as a child of the enumerated type
7755 gen_enumeration_type_die (type
, context_die
)
7757 register dw_die_ref context_die
;
7759 register dw_die_ref type_die
= lookup_type_die (type
);
7761 if (type_die
== NULL
)
7763 type_die
= new_die (DW_TAG_enumeration_type
,
7764 scope_die_for (type
, context_die
));
7765 equate_type_number_to_die (type
, type_die
);
7766 add_name_attribute (type_die
, type_tag (type
));
7768 else if (! TYPE_SIZE (type
))
7771 remove_AT (type_die
, DW_AT_declaration
);
7773 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7774 given enum type is incomplete, do not generate the DW_AT_byte_size
7775 attribute or the DW_AT_element_list attribute. */
7776 if (TYPE_SIZE (type
))
7780 TREE_ASM_WRITTEN (type
) = 1;
7781 add_byte_size_attribute (type_die
, type
);
7782 if (TYPE_STUB_DECL (type
) != NULL_TREE
)
7783 add_src_coords_attributes (type_die
, TYPE_STUB_DECL (type
));
7785 /* If the first reference to this type was as the return type of an
7786 inline function, then it may not have a parent. Fix this now. */
7787 if (type_die
->die_parent
== NULL
)
7788 add_child_die (scope_die_for (type
, context_die
), type_die
);
7790 for (link
= TYPE_FIELDS (type
);
7791 link
!= NULL
; link
= TREE_CHAIN (link
))
7793 register dw_die_ref enum_die
= new_die (DW_TAG_enumerator
, type_die
);
7795 add_name_attribute (enum_die
,
7796 IDENTIFIER_POINTER (TREE_PURPOSE (link
)));
7797 add_AT_unsigned (enum_die
, DW_AT_const_value
,
7798 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link
)));
7802 add_AT_flag (type_die
, DW_AT_declaration
, 1);
7806 /* Generate a DIE to represent either a real live formal parameter decl or to
7807 represent just the type of some formal parameter position in some function
7810 Note that this routine is a bit unusual because its argument may be a
7811 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
7812 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
7813 node. If it's the former then this function is being called to output a
7814 DIE to represent a formal parameter object (or some inlining thereof). If
7815 it's the latter, then this function is only being called to output a
7816 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
7817 argument type of some subprogram type. */
7820 gen_formal_parameter_die (node
, context_die
)
7822 register dw_die_ref context_die
;
7824 register dw_die_ref parm_die
7825 = new_die (DW_TAG_formal_parameter
, context_die
);
7826 register tree origin
;
7828 switch (TREE_CODE_CLASS (TREE_CODE (node
)))
7831 origin
= decl_ultimate_origin (node
);
7833 add_abstract_origin_attribute (parm_die
, origin
);
7836 add_name_and_src_coords_attributes (parm_die
, node
);
7837 add_type_attribute (parm_die
, TREE_TYPE (node
),
7838 TREE_READONLY (node
),
7839 TREE_THIS_VOLATILE (node
),
7841 if (DECL_ARTIFICIAL (node
))
7842 add_AT_flag (parm_die
, DW_AT_artificial
, 1);
7845 equate_decl_number_to_die (node
, parm_die
);
7846 if (! DECL_ABSTRACT (node
))
7847 add_location_or_const_value_attribute (parm_die
, node
);
7852 /* We were called with some kind of a ..._TYPE node. */
7853 add_type_attribute (parm_die
, node
, 0, 0, context_die
);
7863 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
7864 at the end of an (ANSI prototyped) formal parameters list. */
7867 gen_unspecified_parameters_die (decl_or_type
, context_die
)
7868 register tree decl_or_type
;
7869 register dw_die_ref context_die
;
7871 register dw_die_ref parm_die
= new_die (DW_TAG_unspecified_parameters
,
7875 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
7876 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
7877 parameters as specified in some function type specification (except for
7878 those which appear as part of a function *definition*).
7880 Note we must be careful here to output all of the parameter DIEs before*
7881 we output any DIEs needed to represent the types of the formal parameters.
7882 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
7883 non-parameter DIE it sees ends the formal parameter list. */
7886 gen_formal_types_die (function_or_method_type
, context_die
)
7887 register tree function_or_method_type
;
7888 register dw_die_ref context_die
;
7891 register tree formal_type
= NULL
;
7892 register tree first_parm_type
= TYPE_ARG_TYPES (function_or_method_type
);
7895 /* In the case where we are generating a formal types list for a C++
7896 non-static member function type, skip over the first thing on the
7897 TYPE_ARG_TYPES list because it only represents the type of the hidden
7898 `this pointer'. The debugger should be able to figure out (without
7899 being explicitly told) that this non-static member function type takes a
7900 `this pointer' and should be able to figure what the type of that hidden
7901 parameter is from the DW_AT_member attribute of the parent
7902 DW_TAG_subroutine_type DIE. */
7903 if (TREE_CODE (function_or_method_type
) == METHOD_TYPE
)
7904 first_parm_type
= TREE_CHAIN (first_parm_type
);
7907 /* Make our first pass over the list of formal parameter types and output a
7908 DW_TAG_formal_parameter DIE for each one. */
7909 for (link
= first_parm_type
; link
; link
= TREE_CHAIN (link
))
7911 register dw_die_ref parm_die
;
7913 formal_type
= TREE_VALUE (link
);
7914 if (formal_type
== void_type_node
)
7917 /* Output a (nameless) DIE to represent the formal parameter itself. */
7918 parm_die
= gen_formal_parameter_die (formal_type
, context_die
);
7919 if (TREE_CODE (function_or_method_type
) == METHOD_TYPE
7920 && link
== first_parm_type
)
7921 add_AT_flag (parm_die
, DW_AT_artificial
, 1);
7924 /* If this function type has an ellipsis, add a
7925 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
7926 if (formal_type
!= void_type_node
)
7927 gen_unspecified_parameters_die (function_or_method_type
, context_die
);
7929 /* Make our second (and final) pass over the list of formal parameter types
7930 and output DIEs to represent those types (as necessary). */
7931 for (link
= TYPE_ARG_TYPES (function_or_method_type
);
7933 link
= TREE_CHAIN (link
))
7935 formal_type
= TREE_VALUE (link
);
7936 if (formal_type
== void_type_node
)
7939 gen_type_die (formal_type
, context_die
);
7943 /* Generate a DIE to represent a declared function (either file-scope or
7947 gen_subprogram_die (decl
, context_die
)
7949 register dw_die_ref context_die
;
7951 char label_id
[MAX_ARTIFICIAL_LABEL_BYTES
];
7952 register tree origin
= decl_ultimate_origin (decl
);
7953 register dw_die_ref subr_die
;
7954 register dw_loc_descr_ref fp_loc
= NULL
;
7955 register rtx fp_reg
;
7956 register tree fn_arg_types
;
7957 register tree outer_scope
;
7958 register dw_die_ref old_die
= lookup_decl_die (decl
);
7959 register int declaration
7960 = (current_function_decl
!= decl
7962 && (context_die
->die_tag
== DW_TAG_structure_type
7963 || context_die
->die_tag
== DW_TAG_union_type
)));
7967 subr_die
= new_die (DW_TAG_subprogram
, context_die
);
7968 add_abstract_origin_attribute (subr_die
, origin
);
7970 else if (old_die
&& DECL_ABSTRACT (decl
)
7971 && get_AT_unsigned (old_die
, DW_AT_inline
))
7973 /* This must be a redefinition of an extern inline function.
7974 We can just reuse the old die here. */
7977 /* Clear out the inlined attribute and parm types. */
7978 remove_AT (subr_die
, DW_AT_inline
);
7979 remove_children (subr_die
);
7983 register unsigned file_index
7984 = lookup_filename (DECL_SOURCE_FILE (decl
));
7986 if (get_AT_flag (old_die
, DW_AT_declaration
) != 1)
7989 /* If the definition comes from the same place as the declaration,
7990 maybe use the old DIE. We always want the DIE for this function
7991 that has the *_pc attributes to be under comp_unit_die so the
7992 debugger can find it. For inlines, that is the concrete instance,
7993 so we can use the old DIE here. For non-inline methods, we want a
7994 specification DIE at toplevel, so we need a new DIE. For local
7995 class methods, this does not apply. */
7996 if ((DECL_ABSTRACT (decl
) || old_die
->die_parent
== comp_unit_die
7997 || context_die
== NULL
)
7998 && get_AT_unsigned (old_die
, DW_AT_decl_file
) == file_index
7999 && (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8000 == DECL_SOURCE_LINE (decl
)))
8004 /* Clear out the declaration attribute and the parm types. */
8005 remove_AT (subr_die
, DW_AT_declaration
);
8006 remove_children (subr_die
);
8010 subr_die
= new_die (DW_TAG_subprogram
, context_die
);
8011 add_AT_die_ref (subr_die
, DW_AT_specification
, old_die
);
8012 if (get_AT_unsigned (old_die
, DW_AT_decl_file
) != file_index
)
8013 add_AT_unsigned (subr_die
, DW_AT_decl_file
, file_index
);
8014 if (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8015 != DECL_SOURCE_LINE (decl
))
8017 (subr_die
, DW_AT_decl_line
, DECL_SOURCE_LINE (decl
));
8022 register dw_die_ref scope_die
;
8024 if (DECL_CONTEXT (decl
))
8025 scope_die
= scope_die_for (decl
, context_die
);
8027 /* Don't put block extern declarations under comp_unit_die. */
8028 scope_die
= context_die
;
8030 subr_die
= new_die (DW_TAG_subprogram
, scope_die
);
8032 if (TREE_PUBLIC (decl
))
8033 add_AT_flag (subr_die
, DW_AT_external
, 1);
8035 add_name_and_src_coords_attributes (subr_die
, decl
);
8036 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8038 register tree type
= TREE_TYPE (decl
);
8040 add_prototyped_attribute (subr_die
, type
);
8041 add_type_attribute (subr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8044 add_pure_or_virtual_attribute (subr_die
, decl
);
8045 if (DECL_ARTIFICIAL (decl
))
8046 add_AT_flag (subr_die
, DW_AT_artificial
, 1);
8047 if (TREE_PROTECTED (decl
))
8048 add_AT_unsigned (subr_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8049 else if (TREE_PRIVATE (decl
))
8050 add_AT_unsigned (subr_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8055 add_AT_flag (subr_die
, DW_AT_declaration
, 1);
8057 /* The first time we see a member function, it is in the context of
8058 the class to which it belongs. We make sure of this by emitting
8059 the class first. The next time is the definition, which is
8060 handled above. The two may come from the same source text. */
8061 if (DECL_CONTEXT (decl
))
8062 equate_decl_number_to_die (decl
, subr_die
);
8064 else if (DECL_ABSTRACT (decl
))
8066 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8067 but not for extern inline functions. We can't get this completely
8068 correct because information about whether the function was declared
8069 inline is not saved anywhere. */
8070 if (DECL_DEFER_OUTPUT (decl
))
8072 if (DECL_INLINE (decl
))
8073 add_AT_unsigned (subr_die
, DW_AT_inline
, DW_INL_declared_inlined
);
8075 add_AT_unsigned (subr_die
, DW_AT_inline
,
8076 DW_INL_declared_not_inlined
);
8078 else if (DECL_INLINE (decl
))
8079 add_AT_unsigned (subr_die
, DW_AT_inline
, DW_INL_inlined
);
8083 equate_decl_number_to_die (decl
, subr_die
);
8085 else if (!DECL_EXTERNAL (decl
))
8087 if (origin
== NULL_TREE
)
8088 equate_decl_number_to_die (decl
, subr_die
);
8090 ASM_GENERATE_INTERNAL_LABEL (label_id
, FUNC_BEGIN_LABEL
,
8091 current_funcdef_number
);
8092 add_AT_lbl_id (subr_die
, DW_AT_low_pc
, label_id
);
8093 ASM_GENERATE_INTERNAL_LABEL (label_id
, FUNC_END_LABEL
,
8094 current_funcdef_number
);
8095 add_AT_lbl_id (subr_die
, DW_AT_high_pc
, label_id
);
8097 add_pubname (decl
, subr_die
);
8098 add_arange (decl
, subr_die
);
8100 #ifdef MIPS_DEBUGGING_INFO
8101 /* Add a reference to the FDE for this routine. */
8102 add_AT_fde_ref (subr_die
, DW_AT_MIPS_fde
, current_funcdef_fde
);
8105 /* Define the "frame base" location for this routine. We use the
8106 frame pointer or stack pointer registers, since the RTL for local
8107 variables is relative to one of them. */
8109 = frame_pointer_needed
? hard_frame_pointer_rtx
: stack_pointer_rtx
;
8110 add_AT_loc (subr_die
, DW_AT_frame_base
, reg_loc_descriptor (fp_reg
));
8113 /* ??? This fails for nested inline functions, because context_display
8114 is not part of the state saved/restored for inline functions. */
8115 if (current_function_needs_context
)
8116 add_AT_location_description (subr_die
, DW_AT_static_link
,
8117 lookup_static_chain (decl
));
8121 /* Now output descriptions of the arguments for this function. This gets
8122 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8123 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8124 `...' at the end of the formal parameter list. In order to find out if
8125 there was a trailing ellipsis or not, we must instead look at the type
8126 associated with the FUNCTION_DECL. This will be a node of type
8127 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8128 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8129 an ellipsis at the end. */
8130 push_decl_scope (decl
);
8132 /* In the case where we are describing a mere function declaration, all we
8133 need to do here (and all we *can* do here) is to describe the *types* of
8134 its formal parameters. */
8135 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
8137 else if (declaration
)
8138 gen_formal_types_die (TREE_TYPE (decl
), subr_die
);
8141 /* Generate DIEs to represent all known formal parameters */
8142 register tree arg_decls
= DECL_ARGUMENTS (decl
);
8145 /* When generating DIEs, generate the unspecified_parameters DIE
8146 instead if we come across the arg "__builtin_va_alist" */
8147 for (parm
= arg_decls
; parm
; parm
= TREE_CHAIN (parm
))
8148 if (TREE_CODE (parm
) == PARM_DECL
)
8150 if (DECL_NAME (parm
)
8151 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm
)),
8152 "__builtin_va_alist"))
8153 gen_unspecified_parameters_die (parm
, subr_die
);
8155 gen_decl_die (parm
, subr_die
);
8158 /* Decide whether we need a unspecified_parameters DIE at the end.
8159 There are 2 more cases to do this for: 1) the ansi ... declaration -
8160 this is detectable when the end of the arg list is not a
8161 void_type_node 2) an unprototyped function declaration (not a
8162 definition). This just means that we have no info about the
8163 parameters at all. */
8164 fn_arg_types
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8165 if (fn_arg_types
!= NULL
)
8167 /* this is the prototyped case, check for ... */
8168 if (TREE_VALUE (tree_last (fn_arg_types
)) != void_type_node
)
8169 gen_unspecified_parameters_die (decl
, subr_die
);
8171 else if (DECL_INITIAL (decl
) == NULL_TREE
)
8172 gen_unspecified_parameters_die (decl
, subr_die
);
8175 /* Output Dwarf info for all of the stuff within the body of the function
8176 (if it has one - it may be just a declaration). */
8177 outer_scope
= DECL_INITIAL (decl
);
8179 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8180 node created to represent a function. This outermost BLOCK actually
8181 represents the outermost binding contour for the function, i.e. the
8182 contour in which the function's formal parameters and labels get
8183 declared. Curiously, it appears that the front end doesn't actually
8184 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8185 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8186 list for the function instead.) The BLOCK_VARS list for the
8187 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8188 the function however, and we output DWARF info for those in
8189 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8190 node representing the function's outermost pair of curly braces, and
8191 any blocks used for the base and member initializers of a C++
8192 constructor function. */
8193 if (! declaration
&& TREE_CODE (outer_scope
) != ERROR_MARK
)
8195 current_function_has_inlines
= 0;
8196 decls_for_scope (outer_scope
, subr_die
, 0);
8198 #if 0 && defined (MIPS_DEBUGGING_INFO)
8199 if (current_function_has_inlines
)
8201 add_AT_flag (subr_die
, DW_AT_MIPS_has_inlines
, 1);
8202 if (! comp_unit_has_inlines
)
8204 add_AT_flag (comp_unit_die
, DW_AT_MIPS_has_inlines
, 1);
8205 comp_unit_has_inlines
= 1;
8214 /* Generate a DIE to represent a declared data object. */
8217 gen_variable_die (decl
, context_die
)
8219 register dw_die_ref context_die
;
8221 register tree origin
= decl_ultimate_origin (decl
);
8222 register dw_die_ref var_die
= new_die (DW_TAG_variable
, context_die
);
8224 dw_die_ref old_die
= lookup_decl_die (decl
);
8226 = (DECL_EXTERNAL (decl
)
8227 || current_function_decl
!= decl_function_context (decl
)
8228 || context_die
->die_tag
== DW_TAG_structure_type
8229 || context_die
->die_tag
== DW_TAG_union_type
);
8232 add_abstract_origin_attribute (var_die
, origin
);
8233 /* Loop unrolling can create multiple blocks that refer to the same
8234 static variable, so we must test for the DW_AT_declaration flag. */
8235 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8236 copy decls and set the DECL_ABSTRACT flag on them instead of
8238 else if (old_die
&& TREE_STATIC (decl
)
8239 && get_AT_flag (old_die
, DW_AT_declaration
) == 1)
8241 /* ??? This is an instantiation of a C++ class level static. */
8242 add_AT_die_ref (var_die
, DW_AT_specification
, old_die
);
8243 if (DECL_NAME (decl
))
8245 register unsigned file_index
8246 = lookup_filename (DECL_SOURCE_FILE (decl
));
8248 if (get_AT_unsigned (old_die
, DW_AT_decl_file
) != file_index
)
8249 add_AT_unsigned (var_die
, DW_AT_decl_file
, file_index
);
8251 if (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8252 != DECL_SOURCE_LINE (decl
))
8254 add_AT_unsigned (var_die
, DW_AT_decl_line
,
8255 DECL_SOURCE_LINE (decl
));
8260 add_name_and_src_coords_attributes (var_die
, decl
);
8261 add_type_attribute (var_die
, TREE_TYPE (decl
),
8262 TREE_READONLY (decl
),
8263 TREE_THIS_VOLATILE (decl
), context_die
);
8265 if (TREE_PUBLIC (decl
))
8266 add_AT_flag (var_die
, DW_AT_external
, 1);
8268 if (DECL_ARTIFICIAL (decl
))
8269 add_AT_flag (var_die
, DW_AT_artificial
, 1);
8271 if (TREE_PROTECTED (decl
))
8272 add_AT_unsigned (var_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8274 else if (TREE_PRIVATE (decl
))
8275 add_AT_unsigned (var_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8279 add_AT_flag (var_die
, DW_AT_declaration
, 1);
8281 if ((declaration
&& decl_class_context (decl
)) || DECL_ABSTRACT (decl
))
8282 equate_decl_number_to_die (decl
, var_die
);
8284 if (! declaration
&& ! DECL_ABSTRACT (decl
))
8286 equate_decl_number_to_die (decl
, var_die
);
8287 add_location_or_const_value_attribute (var_die
, decl
);
8288 add_pubname (decl
, var_die
);
8292 /* Generate a DIE to represent a label identifier. */
8295 gen_label_die (decl
, context_die
)
8297 register dw_die_ref context_die
;
8299 register tree origin
= decl_ultimate_origin (decl
);
8300 register dw_die_ref lbl_die
= new_die (DW_TAG_label
, context_die
);
8302 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8303 char label2
[MAX_ARTIFICIAL_LABEL_BYTES
];
8306 add_abstract_origin_attribute (lbl_die
, origin
);
8308 add_name_and_src_coords_attributes (lbl_die
, decl
);
8310 if (DECL_ABSTRACT (decl
))
8311 equate_decl_number_to_die (decl
, lbl_die
);
8314 insn
= DECL_RTL (decl
);
8315 if (GET_CODE (insn
) == CODE_LABEL
)
8317 /* When optimization is enabled (via -O) some parts of the compiler
8318 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8319 represent source-level labels which were explicitly declared by
8320 the user. This really shouldn't be happening though, so catch
8321 it if it ever does happen. */
8322 if (INSN_DELETED_P (insn
))
8325 sprintf (label2
, INSN_LABEL_FMT
, current_funcdef_number
);
8326 ASM_GENERATE_INTERNAL_LABEL (label
, label2
,
8327 (unsigned) INSN_UID (insn
));
8328 add_AT_lbl_id (lbl_die
, DW_AT_low_pc
, label
);
8333 /* Generate a DIE for a lexical block. */
8336 gen_lexical_block_die (stmt
, context_die
, depth
)
8338 register dw_die_ref context_die
;
8341 register dw_die_ref stmt_die
= new_die (DW_TAG_lexical_block
, context_die
);
8342 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8344 if (! BLOCK_ABSTRACT (stmt
))
8346 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_BEGIN_LABEL
,
8348 add_AT_lbl_id (stmt_die
, DW_AT_low_pc
, label
);
8349 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_END_LABEL
, next_block_number
);
8350 add_AT_lbl_id (stmt_die
, DW_AT_high_pc
, label
);
8353 push_decl_scope (stmt
);
8354 decls_for_scope (stmt
, stmt_die
, depth
);
8358 /* Generate a DIE for an inlined subprogram. */
8361 gen_inlined_subroutine_die (stmt
, context_die
, depth
)
8363 register dw_die_ref context_die
;
8366 if (! BLOCK_ABSTRACT (stmt
))
8368 register dw_die_ref subr_die
8369 = new_die (DW_TAG_inlined_subroutine
, context_die
);
8370 register tree decl
= block_ultimate_origin (stmt
);
8371 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8373 add_abstract_origin_attribute (subr_die
, decl
);
8374 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_BEGIN_LABEL
,
8376 add_AT_lbl_id (subr_die
, DW_AT_low_pc
, label
);
8377 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_END_LABEL
, next_block_number
);
8378 add_AT_lbl_id (subr_die
, DW_AT_high_pc
, label
);
8379 push_decl_scope (decl
);
8380 decls_for_scope (stmt
, subr_die
, depth
);
8382 current_function_has_inlines
= 1;
8386 /* Generate a DIE for a field in a record, or structure. */
8389 gen_field_die (decl
, context_die
)
8391 register dw_die_ref context_die
;
8393 register dw_die_ref decl_die
= new_die (DW_TAG_member
, context_die
);
8395 add_name_and_src_coords_attributes (decl_die
, decl
);
8396 add_type_attribute (decl_die
, member_declared_type (decl
),
8397 TREE_READONLY (decl
), TREE_THIS_VOLATILE (decl
),
8400 /* If this is a bit field... */
8401 if (DECL_BIT_FIELD_TYPE (decl
))
8403 add_byte_size_attribute (decl_die
, decl
);
8404 add_bit_size_attribute (decl_die
, decl
);
8405 add_bit_offset_attribute (decl_die
, decl
);
8408 if (TREE_CODE (DECL_FIELD_CONTEXT (decl
)) != UNION_TYPE
)
8409 add_data_member_location_attribute (decl_die
, decl
);
8411 if (DECL_ARTIFICIAL (decl
))
8412 add_AT_flag (decl_die
, DW_AT_artificial
, 1);
8414 if (TREE_PROTECTED (decl
))
8415 add_AT_unsigned (decl_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8417 else if (TREE_PRIVATE (decl
))
8418 add_AT_unsigned (decl_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8422 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8423 Use modified_type_die instead.
8424 We keep this code here just in case these types of DIEs may be needed to
8425 represent certain things in other languages (e.g. Pascal) someday. */
8427 gen_pointer_type_die (type
, context_die
)
8429 register dw_die_ref context_die
;
8431 register dw_die_ref ptr_die
8432 = new_die (DW_TAG_pointer_type
, scope_die_for (type
, context_die
));
8434 equate_type_number_to_die (type
, ptr_die
);
8435 add_type_attribute (ptr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8436 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
8439 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8440 Use modified_type_die instead.
8441 We keep this code here just in case these types of DIEs may be needed to
8442 represent certain things in other languages (e.g. Pascal) someday. */
8444 gen_reference_type_die (type
, context_die
)
8446 register dw_die_ref context_die
;
8448 register dw_die_ref ref_die
8449 = new_die (DW_TAG_reference_type
, scope_die_for (type
, context_die
));
8451 equate_type_number_to_die (type
, ref_die
);
8452 add_type_attribute (ref_die
, TREE_TYPE (type
), 0, 0, context_die
);
8453 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
8457 /* Generate a DIE for a pointer to a member type. */
8459 gen_ptr_to_mbr_type_die (type
, context_die
)
8461 register dw_die_ref context_die
;
8463 register dw_die_ref ptr_die
8464 = new_die (DW_TAG_ptr_to_member_type
, scope_die_for (type
, context_die
));
8466 equate_type_number_to_die (type
, ptr_die
);
8467 add_AT_die_ref (ptr_die
, DW_AT_containing_type
,
8468 lookup_type_die (TYPE_OFFSET_BASETYPE (type
)));
8469 add_type_attribute (ptr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8472 /* Generate the DIE for the compilation unit. */
8475 gen_compile_unit_die (main_input_filename
)
8476 register char *main_input_filename
;
8479 char *wd
= getpwd ();
8481 comp_unit_die
= new_die (DW_TAG_compile_unit
, NULL
);
8482 add_name_attribute (comp_unit_die
, main_input_filename
);
8485 add_AT_string (comp_unit_die
, DW_AT_comp_dir
, wd
);
8487 sprintf (producer
, "%s %s", language_string
, version_string
);
8489 #ifdef MIPS_DEBUGGING_INFO
8490 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8491 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8492 not appear in the producer string, the debugger reaches the conclusion
8493 that the object file is stripped and has no debugging information.
8494 To get the MIPS/SGI debugger to believe that there is debugging
8495 information in the object file, we add a -g to the producer string. */
8496 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8497 strcat (producer
, " -g");
8500 add_AT_string (comp_unit_die
, DW_AT_producer
, producer
);
8502 if (strcmp (language_string
, "GNU C++") == 0)
8503 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C_plus_plus
);
8505 else if (strcmp (language_string
, "GNU Ada") == 0)
8506 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Ada83
);
8508 else if (strcmp (language_string
, "GNU F77") == 0)
8509 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Fortran77
);
8511 else if (strcmp (language_string
, "GNU Pascal") == 0)
8512 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Pascal83
);
8514 else if (flag_traditional
)
8515 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C
);
8518 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C89
);
8520 #if 0 /* unimplemented */
8521 if (debug_info_level
>= DINFO_LEVEL_VERBOSE
)
8522 add_AT_unsigned (comp_unit_die
, DW_AT_macro_info
, 0);
8526 /* Generate a DIE for a string type. */
8529 gen_string_type_die (type
, context_die
)
8531 register dw_die_ref context_die
;
8533 register dw_die_ref type_die
8534 = new_die (DW_TAG_string_type
, scope_die_for (type
, context_die
));
8536 equate_type_number_to_die (type
, type_die
);
8538 /* Fudge the string length attribute for now. */
8540 /* TODO: add string length info.
8541 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8542 bound_representation (upper_bound, 0, 'u'); */
8545 /* Generate the DIE for a base class. */
8548 gen_inheritance_die (binfo
, context_die
)
8549 register tree binfo
;
8550 register dw_die_ref context_die
;
8552 dw_die_ref die
= new_die (DW_TAG_inheritance
, context_die
);
8554 add_type_attribute (die
, BINFO_TYPE (binfo
), 0, 0, context_die
);
8555 add_data_member_location_attribute (die
, binfo
);
8557 if (TREE_VIA_VIRTUAL (binfo
))
8558 add_AT_unsigned (die
, DW_AT_virtuality
, DW_VIRTUALITY_virtual
);
8559 if (TREE_VIA_PUBLIC (binfo
))
8560 add_AT_unsigned (die
, DW_AT_accessibility
, DW_ACCESS_public
);
8561 else if (TREE_VIA_PROTECTED (binfo
))
8562 add_AT_unsigned (die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8565 /* Genearate a DIE for a class member. */
8568 gen_member_die (type
, context_die
)
8570 register dw_die_ref context_die
;
8572 register tree member
;
8574 /* If this is not an incomplete type, output descriptions of each of its
8575 members. Note that as we output the DIEs necessary to represent the
8576 members of this record or union type, we will also be trying to output
8577 DIEs to represent the *types* of those members. However the `type'
8578 function (above) will specifically avoid generating type DIEs for member
8579 types *within* the list of member DIEs for this (containing) type execpt
8580 for those types (of members) which are explicitly marked as also being
8581 members of this (containing) type themselves. The g++ front- end can
8582 force any given type to be treated as a member of some other
8583 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8584 to point to the TREE node representing the appropriate (containing)
8587 /* First output info about the base classes. */
8588 if (TYPE_BINFO (type
) && TYPE_BINFO_BASETYPES (type
))
8590 register tree bases
= TYPE_BINFO_BASETYPES (type
);
8591 register int n_bases
= TREE_VEC_LENGTH (bases
);
8594 for (i
= 0; i
< n_bases
; i
++)
8595 gen_inheritance_die (TREE_VEC_ELT (bases
, i
), context_die
);
8598 /* Now output info about the data members and type members. */
8599 for (member
= TYPE_FIELDS (type
); member
; member
= TREE_CHAIN (member
))
8600 gen_decl_die (member
, context_die
);
8602 /* Now output info about the function members (if any). */
8603 for (member
= TYPE_METHODS (type
); member
; member
= TREE_CHAIN (member
))
8604 gen_decl_die (member
, context_die
);
8607 /* Generate a DIE for a structure or union type. */
8610 gen_struct_or_union_type_die (type
, context_die
)
8612 register dw_die_ref context_die
;
8614 register dw_die_ref type_die
= lookup_type_die (type
);
8615 register dw_die_ref scope_die
= 0;
8616 register int nested
= 0;
8618 if (type_die
&& ! TYPE_SIZE (type
))
8621 if (TYPE_CONTEXT (type
) != NULL_TREE
8622 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't')
8625 scope_die
= scope_die_for (type
, context_die
);
8627 if (! type_die
|| (nested
&& scope_die
== comp_unit_die
))
8628 /* First occurrence of type or toplevel definition of nested class. */
8630 register dw_die_ref old_die
= type_die
;
8632 type_die
= new_die (TREE_CODE (type
) == RECORD_TYPE
8633 ? DW_TAG_structure_type
: DW_TAG_union_type
,
8635 equate_type_number_to_die (type
, type_die
);
8636 add_name_attribute (type_die
, type_tag (type
));
8638 add_AT_die_ref (type_die
, DW_AT_specification
, old_die
);
8641 remove_AT (type_die
, DW_AT_declaration
);
8643 /* If we're not in the right context to be defining this type, defer to
8644 avoid tricky recursion. */
8645 if (TYPE_SIZE (type
) && decl_scope_depth
> 0 && scope_die
== comp_unit_die
)
8647 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8650 /* If this type has been completed, then give it a byte_size attribute and
8651 then give a list of members. */
8652 else if (TYPE_SIZE (type
))
8654 /* Prevent infinite recursion in cases where the type of some member of
8655 this type is expressed in terms of this type itself. */
8656 TREE_ASM_WRITTEN (type
) = 1;
8657 add_byte_size_attribute (type_die
, type
);
8658 if (TYPE_STUB_DECL (type
) != NULL_TREE
)
8659 add_src_coords_attributes (type_die
, TYPE_STUB_DECL (type
));
8661 /* If the first reference to this type was as the return type of an
8662 inline function, then it may not have a parent. Fix this now. */
8663 if (type_die
->die_parent
== NULL
)
8664 add_child_die (scope_die
, type_die
);
8666 push_decl_scope (type
);
8667 gen_member_die (type
, type_die
);
8670 /* GNU extension: Record what type our vtable lives in. */
8671 if (TYPE_VFIELD (type
))
8673 tree vtype
= DECL_FCONTEXT (TYPE_VFIELD (type
));
8675 gen_type_die (vtype
, context_die
);
8676 add_AT_die_ref (type_die
, DW_AT_containing_type
,
8677 lookup_type_die (vtype
));
8681 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8684 /* Generate a DIE for a subroutine _type_. */
8687 gen_subroutine_type_die (type
, context_die
)
8689 register dw_die_ref context_die
;
8691 register tree return_type
= TREE_TYPE (type
);
8692 register dw_die_ref subr_die
8693 = new_die (DW_TAG_subroutine_type
, scope_die_for (type
, context_die
));
8695 equate_type_number_to_die (type
, subr_die
);
8696 add_prototyped_attribute (subr_die
, type
);
8697 add_type_attribute (subr_die
, return_type
, 0, 0, context_die
);
8698 gen_formal_types_die (type
, subr_die
);
8701 /* Generate a DIE for a type definition */
8704 gen_typedef_die (decl
, context_die
)
8706 register dw_die_ref context_die
;
8708 register dw_die_ref type_die
;
8709 register tree origin
;
8711 if (TREE_ASM_WRITTEN (decl
))
8713 TREE_ASM_WRITTEN (decl
) = 1;
8715 type_die
= new_die (DW_TAG_typedef
, scope_die_for (decl
, context_die
));
8716 origin
= decl_ultimate_origin (decl
);
8718 add_abstract_origin_attribute (type_die
, origin
);
8722 add_name_and_src_coords_attributes (type_die
, decl
);
8723 if (DECL_ORIGINAL_TYPE (decl
))
8725 type
= DECL_ORIGINAL_TYPE (decl
);
8726 equate_type_number_to_die (TREE_TYPE (decl
), type_die
);
8729 type
= TREE_TYPE (decl
);
8730 add_type_attribute (type_die
, type
, TREE_READONLY (decl
),
8731 TREE_THIS_VOLATILE (decl
), context_die
);
8734 if (DECL_ABSTRACT (decl
))
8735 equate_decl_number_to_die (decl
, type_die
);
8738 /* Generate a type description DIE. */
8741 gen_type_die (type
, context_die
)
8743 register dw_die_ref context_die
;
8745 if (type
== NULL_TREE
|| type
== error_mark_node
)
8748 /* We are going to output a DIE to represent the unqualified version of of
8749 this type (i.e. without any const or volatile qualifiers) so get the
8750 main variant (i.e. the unqualified version) of this type now. */
8751 type
= type_main_variant (type
);
8753 if (TREE_ASM_WRITTEN (type
))
8756 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8757 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
8759 TREE_ASM_WRITTEN (type
) = 1;
8760 gen_decl_die (TYPE_NAME (type
), context_die
);
8764 switch (TREE_CODE (type
))
8770 case REFERENCE_TYPE
:
8771 /* For these types, all that is required is that we output a DIE (or a
8772 set of DIEs) to represent the "basis" type. */
8773 gen_type_die (TREE_TYPE (type
), context_die
);
8777 /* This code is used for C++ pointer-to-data-member types.
8778 Output a description of the relevant class type. */
8779 gen_type_die (TYPE_OFFSET_BASETYPE (type
), context_die
);
8781 /* Output a description of the type of the object pointed to. */
8782 gen_type_die (TREE_TYPE (type
), context_die
);
8784 /* Now output a DIE to represent this pointer-to-data-member type
8786 gen_ptr_to_mbr_type_die (type
, context_die
);
8790 gen_type_die (TYPE_DOMAIN (type
), context_die
);
8791 gen_set_type_die (type
, context_die
);
8795 gen_type_die (TREE_TYPE (type
), context_die
);
8796 abort (); /* No way to represent these in Dwarf yet! */
8800 /* Force out return type (in case it wasn't forced out already). */
8801 gen_type_die (TREE_TYPE (type
), context_die
);
8802 gen_subroutine_type_die (type
, context_die
);
8806 /* Force out return type (in case it wasn't forced out already). */
8807 gen_type_die (TREE_TYPE (type
), context_die
);
8808 gen_subroutine_type_die (type
, context_die
);
8812 if (TYPE_STRING_FLAG (type
) && TREE_CODE (TREE_TYPE (type
)) == CHAR_TYPE
)
8814 gen_type_die (TREE_TYPE (type
), context_die
);
8815 gen_string_type_die (type
, context_die
);
8818 gen_array_type_die (type
, context_die
);
8824 case QUAL_UNION_TYPE
:
8825 /* If this is a nested type whose containing class hasn't been
8826 written out yet, writing it out will cover this one, too. */
8827 if (TYPE_CONTEXT (type
)
8828 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't'
8829 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
8831 gen_type_die (TYPE_CONTEXT (type
), context_die
);
8833 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
8836 /* If that failed, attach ourselves to the stub. */
8837 push_decl_scope (TYPE_CONTEXT (type
));
8838 context_die
= lookup_type_die (TYPE_CONTEXT (type
));
8841 if (TREE_CODE (type
) == ENUMERAL_TYPE
)
8842 gen_enumeration_type_die (type
, context_die
);
8844 gen_struct_or_union_type_die (type
, context_die
);
8846 if (TYPE_CONTEXT (type
)
8847 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't'
8848 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
8851 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
8852 it up if it is ever completed. gen_*_type_die will set it for us
8853 when appropriate. */
8862 /* No DIEs needed for fundamental types. */
8866 /* No Dwarf representation currently defined. */
8873 TREE_ASM_WRITTEN (type
) = 1;
8876 /* Generate a DIE for a tagged type instantiation. */
8879 gen_tagged_type_instantiation_die (type
, context_die
)
8881 register dw_die_ref context_die
;
8883 if (type
== NULL_TREE
|| type
== error_mark_node
)
8886 /* We are going to output a DIE to represent the unqualified version of of
8887 this type (i.e. without any const or volatile qualifiers) so make sure
8888 that we have the main variant (i.e. the unqualified version) of this
8890 if (type
!= type_main_variant (type
)
8891 || !TREE_ASM_WRITTEN (type
))
8894 switch (TREE_CODE (type
))
8900 gen_inlined_enumeration_type_die (type
, context_die
);
8904 gen_inlined_structure_type_die (type
, context_die
);
8908 case QUAL_UNION_TYPE
:
8909 gen_inlined_union_type_die (type
, context_die
);
8917 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
8918 things which are local to the given block. */
8921 gen_block_die (stmt
, context_die
, depth
)
8923 register dw_die_ref context_die
;
8926 register int must_output_die
= 0;
8927 register tree origin
;
8929 register enum tree_code origin_code
;
8931 /* Ignore blocks never really used to make RTL. */
8933 if (stmt
== NULL_TREE
|| !TREE_USED (stmt
))
8936 /* Determine the "ultimate origin" of this block. This block may be an
8937 inlined instance of an inlined instance of inline function, so we have
8938 to trace all of the way back through the origin chain to find out what
8939 sort of node actually served as the original seed for the creation of
8940 the current block. */
8941 origin
= block_ultimate_origin (stmt
);
8942 origin_code
= (origin
!= NULL
) ? TREE_CODE (origin
) : ERROR_MARK
;
8944 /* Determine if we need to output any Dwarf DIEs at all to represent this
8946 if (origin_code
== FUNCTION_DECL
)
8947 /* The outer scopes for inlinings *must* always be represented. We
8948 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
8949 must_output_die
= 1;
8952 /* In the case where the current block represents an inlining of the
8953 "body block" of an inline function, we must *NOT* output any DIE for
8954 this block because we have already output a DIE to represent the
8955 whole inlined function scope and the "body block" of any function
8956 doesn't really represent a different scope according to ANSI C
8957 rules. So we check here to make sure that this block does not
8958 represent a "body block inlining" before trying to set the
8959 `must_output_die' flag. */
8960 if (! is_body_block (origin
? origin
: stmt
))
8962 /* Determine if this block directly contains any "significant"
8963 local declarations which we will need to output DIEs for. */
8964 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8965 /* We are not in terse mode so *any* local declaration counts
8966 as being a "significant" one. */
8967 must_output_die
= (BLOCK_VARS (stmt
) != NULL
);
8969 /* We are in terse mode, so only local (nested) function
8970 definitions count as "significant" local declarations. */
8971 for (decl
= BLOCK_VARS (stmt
);
8972 decl
!= NULL
; decl
= TREE_CHAIN (decl
))
8973 if (TREE_CODE (decl
) == FUNCTION_DECL
8974 && DECL_INITIAL (decl
))
8976 must_output_die
= 1;
8982 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
8983 DIE for any block which contains no significant local declarations at
8984 all. Rather, in such cases we just call `decls_for_scope' so that any
8985 needed Dwarf info for any sub-blocks will get properly generated. Note
8986 that in terse mode, our definition of what constitutes a "significant"
8987 local declaration gets restricted to include only inlined function
8988 instances and local (nested) function definitions. */
8989 if (must_output_die
)
8991 if (origin_code
== FUNCTION_DECL
)
8992 gen_inlined_subroutine_die (stmt
, context_die
, depth
);
8994 gen_lexical_block_die (stmt
, context_die
, depth
);
8997 decls_for_scope (stmt
, context_die
, depth
);
9000 /* Generate all of the decls declared within a given scope and (recursively)
9001 all of it's sub-blocks. */
9004 decls_for_scope (stmt
, context_die
, depth
)
9006 register dw_die_ref context_die
;
9010 register tree subblocks
;
9012 /* Ignore blocks never really used to make RTL. */
9013 if (stmt
== NULL_TREE
|| ! TREE_USED (stmt
))
9016 if (!BLOCK_ABSTRACT (stmt
) && depth
> 0)
9017 next_block_number
++;
9019 /* Output the DIEs to represent all of the data objects and typedefs
9020 declared directly within this block but not within any nested
9021 sub-blocks. Also, nested function and tag DIEs have been
9022 generated with a parent of NULL; fix that up now. */
9023 for (decl
= BLOCK_VARS (stmt
);
9024 decl
!= NULL
; decl
= TREE_CHAIN (decl
))
9026 register dw_die_ref die
;
9028 if (TREE_CODE (decl
) == FUNCTION_DECL
)
9029 die
= lookup_decl_die (decl
);
9030 else if (TREE_CODE (decl
) == TYPE_DECL
&& TYPE_DECL_IS_STUB (decl
))
9031 die
= lookup_type_die (TREE_TYPE (decl
));
9035 if (die
!= NULL
&& die
->die_parent
== NULL
)
9036 add_child_die (context_die
, die
);
9038 gen_decl_die (decl
, context_die
);
9041 /* Output the DIEs to represent all sub-blocks (and the items declared
9042 therein) of this block. */
9043 for (subblocks
= BLOCK_SUBBLOCKS (stmt
);
9045 subblocks
= BLOCK_CHAIN (subblocks
))
9046 gen_block_die (subblocks
, context_die
, depth
+ 1);
9049 /* Is this a typedef we can avoid emitting? */
9052 is_redundant_typedef (decl
)
9055 if (TYPE_DECL_IS_STUB (decl
))
9058 if (DECL_ARTIFICIAL (decl
)
9059 && DECL_CONTEXT (decl
)
9060 && is_tagged_type (DECL_CONTEXT (decl
))
9061 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl
))) == TYPE_DECL
9062 && DECL_NAME (decl
) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl
))))
9063 /* Also ignore the artificial member typedef for the class name. */
9069 /* Generate Dwarf debug information for a decl described by DECL. */
9072 gen_decl_die (decl
, context_die
)
9074 register dw_die_ref context_die
;
9076 register tree origin
;
9078 /* Make a note of the decl node we are going to be working on. We may need
9079 to give the user the source coordinates of where it appeared in case we
9080 notice (later on) that something about it looks screwy. */
9081 dwarf_last_decl
= decl
;
9083 if (TREE_CODE (decl
) == ERROR_MARK
)
9086 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9087 ignore a function definition, since that would screw up our count of
9088 blocks, and that it turn will completely screw up the the labels we will
9089 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9090 subsequent blocks). */
9091 if (DECL_IGNORED_P (decl
) && TREE_CODE (decl
) != FUNCTION_DECL
)
9094 switch (TREE_CODE (decl
))
9097 /* The individual enumerators of an enum type get output when we output
9098 the Dwarf representation of the relevant enum type itself. */
9102 /* Don't output any DIEs to represent mere function declarations,
9103 unless they are class members or explicit block externs. */
9104 if (DECL_INITIAL (decl
) == NULL_TREE
&& DECL_CONTEXT (decl
) == NULL_TREE
9105 && (current_function_decl
== NULL_TREE
|| ! DECL_ARTIFICIAL (decl
)))
9108 if (debug_info_level
> DINFO_LEVEL_TERSE
)
9110 /* Before we describe the FUNCTION_DECL itself, make sure that we
9111 have described its return type. */
9112 gen_type_die (TREE_TYPE (TREE_TYPE (decl
)), context_die
);
9114 /* And its containing type. */
9115 origin
= decl_class_context (decl
);
9116 if (origin
!= NULL_TREE
)
9117 gen_type_die (origin
, context_die
);
9119 /* And its virtual context. */
9120 if (DECL_VINDEX (decl
) != NULL_TREE
)
9121 gen_type_die (DECL_CONTEXT (decl
), context_die
);
9124 /* Now output a DIE to represent the function itself. */
9125 gen_subprogram_die (decl
, context_die
);
9129 /* If we are in terse mode, don't generate any DIEs to represent any
9131 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9134 /* In the special case of a TYPE_DECL node representing the
9135 declaration of some type tag, if the given TYPE_DECL is marked as
9136 having been instantiated from some other (original) TYPE_DECL node
9137 (e.g. one which was generated within the original definition of an
9138 inline function) we have to generate a special (abbreviated)
9139 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9141 if (TYPE_DECL_IS_STUB (decl
) && DECL_ABSTRACT_ORIGIN (decl
) != NULL_TREE
)
9143 gen_tagged_type_instantiation_die (TREE_TYPE (decl
), context_die
);
9147 if (is_redundant_typedef (decl
))
9148 gen_type_die (TREE_TYPE (decl
), context_die
);
9150 /* Output a DIE to represent the typedef itself. */
9151 gen_typedef_die (decl
, context_die
);
9155 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9156 gen_label_die (decl
, context_die
);
9160 /* If we are in terse mode, don't generate any DIEs to represent any
9161 variable declarations or definitions. */
9162 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9165 /* Output any DIEs that are needed to specify the type of this data
9167 gen_type_die (TREE_TYPE (decl
), context_die
);
9169 /* And its containing type. */
9170 origin
= decl_class_context (decl
);
9171 if (origin
!= NULL_TREE
)
9172 gen_type_die (origin
, context_die
);
9174 /* Now output the DIE to represent the data object itself. This gets
9175 complicated because of the possibility that the VAR_DECL really
9176 represents an inlined instance of a formal parameter for an inline
9178 origin
= decl_ultimate_origin (decl
);
9179 if (origin
!= NULL_TREE
&& TREE_CODE (origin
) == PARM_DECL
)
9180 gen_formal_parameter_die (decl
, context_die
);
9182 gen_variable_die (decl
, context_die
);
9186 /* Ignore the nameless fields that are used to skip bits, but
9187 handle C++ anonymous unions. */
9188 if (DECL_NAME (decl
) != NULL_TREE
9189 || TREE_CODE (TREE_TYPE (decl
)) == UNION_TYPE
)
9191 gen_type_die (member_declared_type (decl
), context_die
);
9192 gen_field_die (decl
, context_die
);
9197 gen_type_die (TREE_TYPE (decl
), context_die
);
9198 gen_formal_parameter_die (decl
, context_die
);
9206 /* Write the debugging output for DECL. */
9209 dwarf2out_decl (decl
)
9212 register dw_die_ref context_die
= comp_unit_die
;
9214 if (TREE_CODE (decl
) == ERROR_MARK
)
9217 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9218 hope that the node in question doesn't represent a function definition.
9219 If it does, then totally ignoring it is bound to screw up our count of
9220 blocks, and that it turn will completely screw up the the labels we will
9221 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9222 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9223 own sequence numbers with them!) */
9224 if (DECL_IGNORED_P (decl
))
9226 if (TREE_CODE (decl
) == FUNCTION_DECL
9227 && DECL_INITIAL (decl
) != NULL
)
9233 switch (TREE_CODE (decl
))
9236 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9237 builtin function. Explicit programmer-supplied declarations of
9238 these same functions should NOT be ignored however. */
9239 if (DECL_EXTERNAL (decl
) && DECL_FUNCTION_CODE (decl
))
9242 /* What we would really like to do here is to filter out all mere
9243 file-scope declarations of file-scope functions which are never
9244 referenced later within this translation unit (and keep all of ones
9245 that *are* referenced later on) but we aren't clarvoiant, so we have
9246 no idea which functions will be referenced in the future (i.e. later
9247 on within the current translation unit). So here we just ignore all
9248 file-scope function declarations which are not also definitions. If
9249 and when the debugger needs to know something about these funcstion,
9250 it wil have to hunt around and find the DWARF information associated
9251 with the definition of the function. Note that we can't just check
9252 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9253 definitions and which ones represent mere declarations. We have to
9254 check `DECL_INITIAL' instead. That's because the C front-end
9255 supports some weird semantics for "extern inline" function
9256 definitions. These can get inlined within the current translation
9257 unit (an thus, we need to generate DWARF info for their abstract
9258 instances so that the DWARF info for the concrete inlined instances
9259 can have something to refer to) but the compiler never generates any
9260 out-of-lines instances of such things (despite the fact that they
9261 *are* definitions). The important point is that the C front-end
9262 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9263 to generate DWARF for them anyway. Note that the C++ front-end also
9264 plays some similar games for inline function definitions appearing
9265 within include files which also contain
9266 `#pragma interface' pragmas. */
9267 if (DECL_INITIAL (decl
) == NULL_TREE
)
9270 /* If we're a nested function, initially use a parent of NULL; if we're
9271 a plain function, this will be fixed up in decls_for_scope. If
9272 we're a method, it will be ignored, since we already have a DIE. */
9273 if (decl_function_context (decl
))
9279 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9280 declaration and if the declaration was never even referenced from
9281 within this entire compilation unit. We suppress these DIEs in
9282 order to save space in the .debug section (by eliminating entries
9283 which are probably useless). Note that we must not suppress
9284 block-local extern declarations (whether used or not) because that
9285 would screw-up the debugger's name lookup mechanism and cause it to
9286 miss things which really ought to be in scope at a given point. */
9287 if (DECL_EXTERNAL (decl
) && !TREE_USED (decl
))
9290 /* If we are in terse mode, don't generate any DIEs to represent any
9291 variable declarations or definitions. */
9292 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9297 /* Don't bother trying to generate any DIEs to represent any of the
9298 normal built-in types for the language we are compiling. */
9299 if (DECL_SOURCE_LINE (decl
) == 0)
9301 /* OK, we need to generate one for `bool' so GDB knows what type
9302 comparisons have. */
9303 if ((get_AT_unsigned (comp_unit_die
, DW_AT_language
)
9304 == DW_LANG_C_plus_plus
)
9305 && TREE_CODE (TREE_TYPE (decl
)) == BOOLEAN_TYPE
)
9306 modified_type_die (TREE_TYPE (decl
), 0, 0, NULL
);
9311 /* If we are in terse mode, don't generate any DIEs for types. */
9312 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9315 /* If we're a function-scope tag, initially use a parent of NULL;
9316 this will be fixed up in decls_for_scope. */
9317 if (decl_function_context (decl
))
9326 gen_decl_die (decl
, context_die
);
9327 output_pending_types_for_scope (comp_unit_die
);
9330 /* Output a marker (i.e. a label) for the beginning of the generated code for
9334 dwarf2out_begin_block (blocknum
)
9335 register unsigned blocknum
;
9337 function_section (current_function_decl
);
9338 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BLOCK_BEGIN_LABEL
, blocknum
);
9341 /* Output a marker (i.e. a label) for the end of the generated code for a
9345 dwarf2out_end_block (blocknum
)
9346 register unsigned blocknum
;
9348 function_section (current_function_decl
);
9349 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BLOCK_END_LABEL
, blocknum
);
9352 /* Output a marker (i.e. a label) at a point in the assembly code which
9353 corresponds to a given source level label. */
9356 dwarf2out_label (insn
)
9359 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
9361 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9363 function_section (current_function_decl
);
9364 sprintf (label
, INSN_LABEL_FMT
, current_funcdef_number
);
9365 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, label
,
9366 (unsigned) INSN_UID (insn
));
9370 /* Lookup a filename (in the list of filenames that we know about here in
9371 dwarf2out.c) and return its "index". The index of each (known) filename is
9372 just a unique number which is associated with only that one filename.
9373 We need such numbers for the sake of generating labels
9374 (in the .debug_sfnames section) and references to those
9375 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9376 If the filename given as an argument is not found in our current list,
9377 add it to the list and assign it the next available unique index number.
9378 In order to speed up searches, we remember the index of the filename
9379 was looked up last. This handles the majority of all searches. */
9382 lookup_filename (file_name
)
9385 static unsigned last_file_lookup_index
= 0;
9386 register unsigned i
;
9388 /* Check to see if the file name that was searched on the previous call
9389 matches this file name. If so, return the index. */
9390 if (last_file_lookup_index
!= 0)
9391 if (strcmp (file_name
, file_table
[last_file_lookup_index
]) == 0)
9392 return last_file_lookup_index
;
9394 /* Didn't match the previous lookup, search the table */
9395 for (i
= 1; i
< file_table_in_use
; ++i
)
9396 if (strcmp (file_name
, file_table
[i
]) == 0)
9398 last_file_lookup_index
= i
;
9402 /* Prepare to add a new table entry by making sure there is enough space in
9403 the table to do so. If not, expand the current table. */
9404 if (file_table_in_use
== file_table_allocated
)
9406 file_table_allocated
+= FILE_TABLE_INCREMENT
;
9408 = (char **) xrealloc (file_table
,
9409 file_table_allocated
* sizeof (char *));
9412 /* Add the new entry to the end of the filename table. */
9413 file_table
[file_table_in_use
] = xstrdup (file_name
);
9414 last_file_lookup_index
= file_table_in_use
++;
9416 return last_file_lookup_index
;
9419 /* Output a label to mark the beginning of a source code line entry
9420 and record information relating to this source line, in
9421 'line_info_table' for later output of the .debug_line section. */
9424 dwarf2out_line (filename
, line
)
9425 register char *filename
;
9426 register unsigned line
;
9428 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9430 function_section (current_function_decl
);
9432 if (DECL_SECTION_NAME (current_function_decl
))
9434 register dw_separate_line_info_ref line_info
;
9435 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, SEPARATE_LINE_CODE_LABEL
,
9436 separate_line_info_table_in_use
);
9437 fputc ('\n', asm_out_file
);
9439 /* expand the line info table if necessary */
9440 if (separate_line_info_table_in_use
9441 == separate_line_info_table_allocated
)
9443 separate_line_info_table_allocated
+= LINE_INFO_TABLE_INCREMENT
;
9444 separate_line_info_table
9445 = (dw_separate_line_info_ref
)
9446 xrealloc (separate_line_info_table
,
9447 separate_line_info_table_allocated
9448 * sizeof (dw_separate_line_info_entry
));
9451 /* Add the new entry at the end of the line_info_table. */
9453 = &separate_line_info_table
[separate_line_info_table_in_use
++];
9454 line_info
->dw_file_num
= lookup_filename (filename
);
9455 line_info
->dw_line_num
= line
;
9456 line_info
->function
= current_funcdef_number
;
9460 register dw_line_info_ref line_info
;
9462 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, LINE_CODE_LABEL
,
9463 line_info_table_in_use
);
9464 fputc ('\n', asm_out_file
);
9466 /* Expand the line info table if necessary. */
9467 if (line_info_table_in_use
== line_info_table_allocated
)
9469 line_info_table_allocated
+= LINE_INFO_TABLE_INCREMENT
;
9471 = (dw_line_info_ref
)
9472 xrealloc (line_info_table
,
9473 (line_info_table_allocated
9474 * sizeof (dw_line_info_entry
)));
9477 /* Add the new entry at the end of the line_info_table. */
9478 line_info
= &line_info_table
[line_info_table_in_use
++];
9479 line_info
->dw_file_num
= lookup_filename (filename
);
9480 line_info
->dw_line_num
= line
;
9485 /* Record the beginning of a new source file, for later output
9486 of the .debug_macinfo section. At present, unimplemented. */
9489 dwarf2out_start_source_file (filename
)
9490 register char *filename
;
9494 /* Record the end of a source file, for later output
9495 of the .debug_macinfo section. At present, unimplemented. */
9498 dwarf2out_end_source_file ()
9502 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9503 the tail part of the directive line, i.e. the part which is past the
9504 initial whitespace, #, whitespace, directive-name, whitespace part. */
9507 dwarf2out_define (lineno
, buffer
)
9508 register unsigned lineno
;
9509 register char *buffer
;
9511 static int initialized
= 0;
9514 dwarf2out_start_source_file (primary_filename
);
9519 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9520 the tail part of the directive line, i.e. the part which is past the
9521 initial whitespace, #, whitespace, directive-name, whitespace part. */
9524 dwarf2out_undef (lineno
, buffer
)
9525 register unsigned lineno
;
9526 register char *buffer
;
9530 /* Set up for Dwarf output at the start of compilation. */
9533 dwarf2out_init (asm_out_file
, main_input_filename
)
9534 register FILE *asm_out_file
;
9535 register char *main_input_filename
;
9537 /* Remember the name of the primary input file. */
9538 primary_filename
= main_input_filename
;
9540 /* Allocate the initial hunk of the file_table. */
9541 file_table
= (char **) xmalloc (FILE_TABLE_INCREMENT
* sizeof (char *));
9542 bzero ((char *) file_table
, FILE_TABLE_INCREMENT
* sizeof (char *));
9543 file_table_allocated
= FILE_TABLE_INCREMENT
;
9545 /* Skip the first entry - file numbers begin at 1. */
9546 file_table_in_use
= 1;
9548 /* Allocate the initial hunk of the decl_die_table. */
9550 = (dw_die_ref
*) xmalloc (DECL_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9551 bzero ((char *) decl_die_table
,
9552 DECL_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9553 decl_die_table_allocated
= DECL_DIE_TABLE_INCREMENT
;
9554 decl_die_table_in_use
= 0;
9556 /* Allocate the initial hunk of the decl_scope_table. */
9558 = (tree
*) xmalloc (DECL_SCOPE_TABLE_INCREMENT
* sizeof (tree
));
9559 bzero ((char *) decl_scope_table
,
9560 DECL_SCOPE_TABLE_INCREMENT
* sizeof (tree
));
9561 decl_scope_table_allocated
= DECL_SCOPE_TABLE_INCREMENT
;
9562 decl_scope_depth
= 0;
9564 /* Allocate the initial hunk of the abbrev_die_table. */
9566 = (dw_die_ref
*) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9567 * sizeof (dw_die_ref
));
9568 bzero ((char *) abbrev_die_table
,
9569 ABBREV_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9570 abbrev_die_table_allocated
= ABBREV_DIE_TABLE_INCREMENT
;
9571 /* Zero-th entry is allocated, but unused */
9572 abbrev_die_table_in_use
= 1;
9574 /* Allocate the initial hunk of the line_info_table. */
9576 = (dw_line_info_ref
) xmalloc (LINE_INFO_TABLE_INCREMENT
9577 * sizeof (dw_line_info_entry
));
9578 bzero ((char *) line_info_table
,
9579 LINE_INFO_TABLE_INCREMENT
* sizeof (dw_line_info_entry
));
9580 line_info_table_allocated
= LINE_INFO_TABLE_INCREMENT
;
9581 /* Zero-th entry is allocated, but unused */
9582 line_info_table_in_use
= 1;
9584 /* Generate the initial DIE for the .debug section. Note that the (string)
9585 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9586 will (typically) be a relative pathname and that this pathname should be
9587 taken as being relative to the directory from which the compiler was
9588 invoked when the given (base) source file was compiled. */
9589 gen_compile_unit_die (main_input_filename
);
9591 ASM_GENERATE_INTERNAL_LABEL (text_end_label
, TEXT_END_LABEL
, 0);
9594 /* Output stuff that dwarf requires at the end of every file,
9595 and generate the DWARF-2 debugging info. */
9600 limbo_die_node
*node
, *next_node
;
9604 /* Traverse the limbo die list, and add parent/child links. The only
9605 dies without parents that should be here are concrete instances of
9606 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9607 For concrete instances, we can get the parent die from the abstract
9609 for (node
= limbo_die_list
; node
; node
= next_node
)
9611 next_node
= node
->next
;
9614 if (die
->die_parent
== NULL
)
9616 a
= get_AT (die
, DW_AT_abstract_origin
);
9618 add_child_die (a
->dw_attr_val
.v
.val_die_ref
->die_parent
, die
);
9619 else if (die
== comp_unit_die
)
9627 /* Traverse the DIE tree and add sibling attributes to those DIE's
9628 that have children. */
9629 add_sibling_attributes (comp_unit_die
);
9631 /* Output a terminator label for the .text section. */
9632 fputc ('\n', asm_out_file
);
9633 ASM_OUTPUT_SECTION (asm_out_file
, TEXT_SECTION
);
9634 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, TEXT_END_LABEL
, 0);
9637 /* Output a terminator label for the .data section. */
9638 fputc ('\n', asm_out_file
);
9639 ASM_OUTPUT_SECTION (asm_out_file
, DATA_SECTION
);
9640 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, DATA_END_LABEL
, 0);
9642 /* Output a terminator label for the .bss section. */
9643 fputc ('\n', asm_out_file
);
9644 ASM_OUTPUT_SECTION (asm_out_file
, BSS_SECTION
);
9645 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BSS_END_LABEL
, 0);
9648 /* Output the source line correspondence table. */
9649 if (line_info_table_in_use
> 1 || separate_line_info_table_in_use
)
9651 fputc ('\n', asm_out_file
);
9652 ASM_OUTPUT_SECTION (asm_out_file
, DEBUG_LINE_SECTION
);
9653 output_line_info ();
9655 /* We can only use the low/high_pc attributes if all of the code
9657 if (separate_line_info_table_in_use
== 0)
9659 add_AT_lbl_id (comp_unit_die
, DW_AT_low_pc
, TEXT_SECTION
);
9660 add_AT_lbl_id (comp_unit_die
, DW_AT_high_pc
, text_end_label
);
9663 add_AT_section_offset (comp_unit_die
, DW_AT_stmt_list
, DEBUG_LINE_SECTION
);
9666 /* Output the abbreviation table. */
9667 fputc ('\n', asm_out_file
);
9668 ASM_OUTPUT_SECTION (asm_out_file
, ABBREV_SECTION
);
9669 build_abbrev_table (comp_unit_die
);
9670 output_abbrev_section ();
9672 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9673 next_die_offset
= DWARF_COMPILE_UNIT_HEADER_SIZE
;
9674 calc_die_sizes (comp_unit_die
);
9676 /* Output debugging information. */
9677 fputc ('\n', asm_out_file
);
9678 ASM_OUTPUT_SECTION (asm_out_file
, DEBUG_INFO_SECTION
);
9679 output_compilation_unit_header ();
9680 output_die (comp_unit_die
);
9682 if (pubname_table_in_use
)
9684 /* Output public names table. */
9685 fputc ('\n', asm_out_file
);
9686 ASM_OUTPUT_SECTION (asm_out_file
, PUBNAMES_SECTION
);
9690 if (fde_table_in_use
)
9692 /* Output the address range information. */
9693 fputc ('\n', asm_out_file
);
9694 ASM_OUTPUT_SECTION (asm_out_file
, ARANGES_SECTION
);
9698 #endif /* DWARF2_DEBUGGING_INFO */