1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 93, 95, 96, 97, 1998 Free Software Foundation, Inc.
3 Contributed by Gary Funck (gary@intrepid.com).
4 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
5 Extensively modified by Jason Merrill (jason@cygnus.com).
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
23 /* The first part of this file deals with the DWARF 2 frame unwind
24 information, which is also used by the GCC efficient exception handling
25 mechanism. The second part, controlled only by an #ifdef
26 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
35 #include "hard-reg-set.h"
37 #include "insn-config.h"
43 #include "dwarf2out.h"
45 #include "dyn-string.h"
47 /* We cannot use <assert.h> in GCC source, since that would include
48 GCC's assert.h, which may not be compatible with the host compiler. */
53 # define assert(e) do { if (! (e)) abort (); } while (0)
56 /* Decide whether we want to emit frame unwind information for the current
62 return (write_symbols
== DWARF2_DEBUG
63 #ifdef DWARF2_FRAME_INFO
66 #ifdef DWARF2_UNWIND_INFO
67 || (flag_exceptions
&& ! exceptions_via_longjmp
)
72 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
78 /* How to start an assembler comment. */
79 #ifndef ASM_COMMENT_START
80 #define ASM_COMMENT_START ";#"
83 typedef struct dw_cfi_struct
*dw_cfi_ref
;
84 typedef struct dw_fde_struct
*dw_fde_ref
;
85 typedef union dw_cfi_oprnd_struct
*dw_cfi_oprnd_ref
;
87 /* Call frames are described using a sequence of Call Frame
88 Information instructions. The register number, offset
89 and address fields are provided as possible operands;
90 their use is selected by the opcode field. */
92 typedef union dw_cfi_oprnd_struct
94 unsigned long dw_cfi_reg_num
;
95 long int dw_cfi_offset
;
100 typedef struct dw_cfi_struct
102 dw_cfi_ref dw_cfi_next
;
103 enum dwarf_call_frame_info dw_cfi_opc
;
104 dw_cfi_oprnd dw_cfi_oprnd1
;
105 dw_cfi_oprnd dw_cfi_oprnd2
;
109 /* All call frame descriptions (FDE's) in the GCC generated DWARF
110 refer to a single Common Information Entry (CIE), defined at
111 the beginning of the .debug_frame section. This used of a single
112 CIE obviates the need to keep track of multiple CIE's
113 in the DWARF generation routines below. */
115 typedef struct dw_fde_struct
118 char *dw_fde_current_label
;
120 dw_cfi_ref dw_fde_cfi
;
124 /* Maximum size (in bytes) of an artificially generated label. */
125 #define MAX_ARTIFICIAL_LABEL_BYTES 30
127 /* Make sure we know the sizes of the various types dwarf can describe. These
128 are only defaults. If the sizes are different for your target, you should
129 override these values by defining the appropriate symbols in your tm.h
132 #ifndef CHAR_TYPE_SIZE
133 #define CHAR_TYPE_SIZE BITS_PER_UNIT
136 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
139 /* The size in bytes of a DWARF field indicating an offset or length
140 relative to a debug info section, specified to be 4 bytes in the DWARF-2
141 specification. The SGI/MIPS ABI defines it to be the same as PTR_SIZE. */
143 #ifndef DWARF_OFFSET_SIZE
144 #define DWARF_OFFSET_SIZE 4
147 #define DWARF_VERSION 2
149 /* Round SIZE up to the nearest BOUNDARY. */
150 #define DWARF_ROUND(SIZE,BOUNDARY) \
151 (((SIZE) + (BOUNDARY) - 1) & ~((BOUNDARY) - 1))
153 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
154 #ifdef STACK_GROWS_DOWNWARD
155 #define DWARF_CIE_DATA_ALIGNMENT (-UNITS_PER_WORD)
157 #define DWARF_CIE_DATA_ALIGNMENT UNITS_PER_WORD
160 /* A pointer to the base of a table that contains frame description
161 information for each routine. */
162 static dw_fde_ref fde_table
;
164 /* Number of elements currently allocated for fde_table. */
165 static unsigned fde_table_allocated
;
167 /* Number of elements in fde_table currently in use. */
168 static unsigned fde_table_in_use
;
170 /* Size (in elements) of increments by which we may expand the
172 #define FDE_TABLE_INCREMENT 256
174 /* A list of call frame insns for the CIE. */
175 static dw_cfi_ref cie_cfi_head
;
177 /* The number of the current function definition for which debugging
178 information is being generated. These numbers range from 1 up to the
179 maximum number of function definitions contained within the current
180 compilation unit. These numbers are used to create unique label id's
181 unique to each function definition. */
182 static unsigned current_funcdef_number
= 0;
184 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
185 attribute that accelerates the lookup of the FDE associated
186 with the subprogram. This variable holds the table index of the FDE
187 associated with the current function (body) definition. */
188 static unsigned current_funcdef_fde
;
190 /* Forward declarations for functions defined in this file. */
192 static char *stripattributes
PROTO((char *));
193 static char *dwarf_cfi_name
PROTO((unsigned));
194 static dw_cfi_ref new_cfi
PROTO((void));
195 static void add_cfi
PROTO((dw_cfi_ref
*, dw_cfi_ref
));
196 static unsigned long size_of_uleb128
PROTO((unsigned long));
197 static unsigned long size_of_sleb128
PROTO((long));
198 static void output_uleb128
PROTO((unsigned long));
199 static void output_sleb128
PROTO((long));
200 static void add_fde_cfi
PROTO((char *, dw_cfi_ref
));
201 static void lookup_cfa_1
PROTO((dw_cfi_ref
, unsigned long *,
203 static void lookup_cfa
PROTO((unsigned long *, long *));
204 static void reg_save
PROTO((char *, unsigned, unsigned,
206 static void initial_return_save
PROTO((rtx
));
207 static void output_cfi
PROTO((dw_cfi_ref
, dw_fde_ref
));
208 static void output_call_frame_info
PROTO((int));
209 static unsigned reg_number
PROTO((rtx
));
210 static void dwarf2out_stack_adjust
PROTO((rtx
));
212 /* Definitions of defaults for assembler-dependent names of various
213 pseudo-ops and section names.
214 Theses may be overridden in the tm.h file (if necessary) for a particular
217 #ifdef OBJECT_FORMAT_ELF
218 #ifndef UNALIGNED_SHORT_ASM_OP
219 #define UNALIGNED_SHORT_ASM_OP ".2byte"
221 #ifndef UNALIGNED_INT_ASM_OP
222 #define UNALIGNED_INT_ASM_OP ".4byte"
224 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
225 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
227 #endif /* OBJECT_FORMAT_ELF */
230 #define ASM_BYTE_OP ".byte"
233 /* Data and reference forms for relocatable data. */
234 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
235 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
237 /* Pseudo-op for defining a new section. */
238 #ifndef SECTION_ASM_OP
239 #define SECTION_ASM_OP ".section"
242 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
243 print the SECTION_ASM_OP and the section name. The default here works for
244 almost all svr4 assemblers, except for the sparc, where the section name
245 must be enclosed in double quotes. (See sparcv4.h). */
246 #ifndef SECTION_FORMAT
247 #ifdef PUSHSECTION_FORMAT
248 #define SECTION_FORMAT PUSHSECTION_FORMAT
250 #define SECTION_FORMAT "\t%s\t%s\n"
254 #ifndef FRAME_SECTION
255 #define FRAME_SECTION ".debug_frame"
258 #ifndef FUNC_BEGIN_LABEL
259 #define FUNC_BEGIN_LABEL "LFB"
261 #ifndef FUNC_END_LABEL
262 #define FUNC_END_LABEL "LFE"
264 #define CIE_AFTER_SIZE_LABEL "LSCIE"
265 #define CIE_END_LABEL "LECIE"
266 #define CIE_LENGTH_LABEL "LLCIE"
267 #define FDE_AFTER_SIZE_LABEL "LSFDE"
268 #define FDE_END_LABEL "LEFDE"
269 #define FDE_LENGTH_LABEL "LLFDE"
271 /* Definitions of defaults for various types of primitive assembly language
272 output operations. These may be overridden from within the tm.h file,
273 but typically, that is unnecessary. */
275 #ifndef ASM_OUTPUT_SECTION
276 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
277 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
280 #ifndef ASM_OUTPUT_DWARF_DATA1
281 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
282 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
285 #ifndef ASM_OUTPUT_DWARF_DELTA1
286 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
287 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
288 assemble_name (FILE, LABEL1); \
289 fprintf (FILE, "-"); \
290 assemble_name (FILE, LABEL2); \
294 #ifdef UNALIGNED_INT_ASM_OP
296 #ifndef UNALIGNED_OFFSET_ASM_OP
297 #define UNALIGNED_OFFSET_ASM_OP \
298 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
301 #ifndef UNALIGNED_WORD_ASM_OP
302 #define UNALIGNED_WORD_ASM_OP \
303 (PTR_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
306 #ifndef ASM_OUTPUT_DWARF_DELTA2
307 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
308 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
309 assemble_name (FILE, LABEL1); \
310 fprintf (FILE, "-"); \
311 assemble_name (FILE, LABEL2); \
315 #ifndef ASM_OUTPUT_DWARF_DELTA4
316 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
317 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
318 assemble_name (FILE, LABEL1); \
319 fprintf (FILE, "-"); \
320 assemble_name (FILE, LABEL2); \
324 #ifndef ASM_OUTPUT_DWARF_DELTA
325 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
326 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
327 assemble_name (FILE, LABEL1); \
328 fprintf (FILE, "-"); \
329 assemble_name (FILE, LABEL2); \
333 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
334 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
335 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
336 assemble_name (FILE, LABEL1); \
337 fprintf (FILE, "-"); \
338 assemble_name (FILE, LABEL2); \
342 #ifndef ASM_OUTPUT_DWARF_ADDR
343 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
344 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
345 assemble_name (FILE, LABEL); \
349 /* ??? This macro takes an RTX in dwarfout.c and a string in dwarf2out.c.
350 We resolve the conflict by creating a new macro ASM_OUTPUT_DWARF2_ADDR_CONST
351 for ports that want to support both DWARF1 and DWARF2. This needs a better
352 solution. See also the comments in sparc/sp64-elf.h. */
353 #ifdef ASM_OUTPUT_DWARF2_ADDR_CONST
354 #undef ASM_OUTPUT_DWARF_ADDR_CONST
355 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
356 ASM_OUTPUT_DWARF2_ADDR_CONST (FILE, ADDR)
359 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
360 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,ADDR) \
361 fprintf ((FILE), "\t%s\t%s", UNALIGNED_WORD_ASM_OP, (ADDR))
364 #ifndef ASM_OUTPUT_DWARF_OFFSET4
365 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
366 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
367 assemble_name (FILE, LABEL); \
371 #ifndef ASM_OUTPUT_DWARF_OFFSET
372 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
373 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
374 assemble_name (FILE, LABEL); \
378 #ifndef ASM_OUTPUT_DWARF_DATA2
379 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
380 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
383 #ifndef ASM_OUTPUT_DWARF_DATA4
384 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
385 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
388 #ifndef ASM_OUTPUT_DWARF_DATA
389 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
390 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
391 (unsigned long) (VALUE))
394 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
395 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
396 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
397 (unsigned long) (VALUE))
400 #ifndef ASM_OUTPUT_DWARF_DATA8
401 #define ASM_OUTPUT_DWARF_DATA8(FILE,HIGH_VALUE,LOW_VALUE) \
403 if (WORDS_BIG_ENDIAN) \
405 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
406 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
410 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
411 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
416 #else /* UNALIGNED_INT_ASM_OP */
418 /* We don't have unaligned support, let's hope the normal output works for
421 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
422 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), PTR_SIZE, 1)
424 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
425 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
427 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
428 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
430 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
431 assemble_integer (gen_rtx_MINUS (HImode, \
432 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
433 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
436 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
437 assemble_integer (gen_rtx_MINUS (SImode, \
438 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
439 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
442 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
443 assemble_integer (gen_rtx_MINUS (Pmode, \
444 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
445 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
448 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
449 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
451 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
452 assemble_integer (GEN_INT (VALUE), 4, 1)
454 #endif /* UNALIGNED_INT_ASM_OP */
457 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
458 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
460 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
461 assemble_name (FILE, SY); \
463 assemble_name (FILE, HI); \
465 assemble_name (FILE, LO); \
468 #endif /* SET_ASM_OP */
470 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
471 newline is produced. When flag_debug_asm is asserted, we add commentary
472 at the end of the line, so we must avoid output of a newline here. */
473 #ifndef ASM_OUTPUT_DWARF_STRING
474 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
476 register int slen = strlen(P); \
477 register char *p = (P); \
479 fprintf (FILE, "\t.ascii \""); \
480 for (i = 0; i < slen; i++) \
482 register int c = p[i]; \
483 if (c == '\"' || c == '\\') \
485 if (c >= ' ' && c < 0177) \
489 fprintf (FILE, "\\%o", c); \
492 fprintf (FILE, "\\0\""); \
497 /* The DWARF 2 CFA column which tracks the return address. Normally this
498 is the column for PC, or the first column after all of the hard
500 #ifndef DWARF_FRAME_RETURN_COLUMN
502 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
504 #define DWARF_FRAME_RETURN_COLUMN FIRST_PSEUDO_REGISTER
508 /* The mapping from gcc register number to DWARF 2 CFA column number. By
509 default, we just provide columns for all registers. */
510 #ifndef DWARF_FRAME_REGNUM
511 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
514 /* Hook used by __throw. */
517 expand_builtin_dwarf_fp_regnum ()
519 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM
));
522 /* The offset from the incoming value of %sp to the top of the stack frame
523 for the current function. */
524 #ifndef INCOMING_FRAME_SP_OFFSET
525 #define INCOMING_FRAME_SP_OFFSET 0
528 /* Return a pointer to a copy of the section string name S with all
529 attributes stripped off, and an asterisk prepended (for assemble_name). */
535 char *stripped
= xmalloc (strlen (s
) + 2);
540 while (*s
&& *s
!= ',')
547 /* Return the register number described by a given RTL node. */
553 register unsigned regno
= REGNO (rtl
);
555 if (regno
>= FIRST_PSEUDO_REGISTER
)
557 warning ("internal regno botch: regno = %d\n", regno
);
561 regno
= DBX_REGISTER_NUMBER (regno
);
565 struct reg_size_range
572 /* Given a register number in REG_TREE, return an rtx for its size in bytes.
573 We do this in kind of a roundabout way, by building up a list of
574 register size ranges and seeing where our register falls in one of those
575 ranges. We need to do it this way because REG_TREE is not a constant,
576 and the target macros were not designed to make this task easy. */
579 expand_builtin_dwarf_reg_size (reg_tree
, target
)
583 enum machine_mode mode
;
585 struct reg_size_range ranges
[5];
592 for (; i
< FIRST_PSEUDO_REGISTER
; ++i
)
594 /* The return address is out of order on the MIPS, and we don't use
595 copy_reg for it anyway, so we don't care here how large it is. */
596 if (DWARF_FRAME_REGNUM (i
) == DWARF_FRAME_RETURN_COLUMN
)
599 mode
= reg_raw_mode
[i
];
601 /* CCmode is arbitrarily given a size of 4 bytes. It is more useful
602 to use the same size as word_mode, since that reduces the number
603 of ranges we need. It should not matter, since the result should
604 never be used for a condition code register anyways. */
605 if (GET_MODE_CLASS (mode
) == MODE_CC
)
608 size
= GET_MODE_SIZE (mode
);
610 /* If this register is not valid in the specified mode and
611 we have a previous size, use that for the size of this
612 register to avoid making junk tiny ranges. */
613 if (! HARD_REGNO_MODE_OK (i
, mode
) && last_size
!= -1)
616 if (size
!= last_size
)
618 ranges
[n_ranges
].beg
= i
;
619 ranges
[n_ranges
].size
= last_size
= size
;
624 ranges
[n_ranges
-1].end
= i
;
627 /* The usual case: fp regs surrounded by general regs. */
628 if (n_ranges
== 3 && ranges
[0].size
== ranges
[2].size
)
630 if ((DWARF_FRAME_REGNUM (ranges
[1].end
)
631 - DWARF_FRAME_REGNUM (ranges
[1].beg
))
632 != ranges
[1].end
- ranges
[1].beg
)
634 t
= fold (build (GE_EXPR
, integer_type_node
, reg_tree
,
635 build_int_2 (DWARF_FRAME_REGNUM (ranges
[1].beg
), 0)));
636 t2
= fold (build (LE_EXPR
, integer_type_node
, reg_tree
,
637 build_int_2 (DWARF_FRAME_REGNUM (ranges
[1].end
), 0)));
638 t
= fold (build (TRUTH_ANDIF_EXPR
, integer_type_node
, t
, t2
));
639 t
= fold (build (COND_EXPR
, integer_type_node
, t
,
640 build_int_2 (ranges
[1].size
, 0),
641 build_int_2 (ranges
[0].size
, 0)));
646 t
= build_int_2 (ranges
[n_ranges
].size
, 0);
647 size
= DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
);
650 if ((DWARF_FRAME_REGNUM (ranges
[n_ranges
].end
)
651 - DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
))
652 != ranges
[n_ranges
].end
- ranges
[n_ranges
].beg
)
654 if (DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
) >= size
)
656 size
= DWARF_FRAME_REGNUM (ranges
[n_ranges
].beg
);
657 t2
= fold (build (LE_EXPR
, integer_type_node
, reg_tree
,
658 build_int_2 (DWARF_FRAME_REGNUM
659 (ranges
[n_ranges
].end
), 0)));
660 t
= fold (build (COND_EXPR
, integer_type_node
, t2
,
661 build_int_2 (ranges
[n_ranges
].size
, 0), t
));
664 return expand_expr (t
, target
, Pmode
, 0);
667 /* Convert a DWARF call frame info. operation to its string name */
670 dwarf_cfi_name (cfi_opc
)
671 register unsigned cfi_opc
;
675 case DW_CFA_advance_loc
:
676 return "DW_CFA_advance_loc";
678 return "DW_CFA_offset";
680 return "DW_CFA_restore";
684 return "DW_CFA_set_loc";
685 case DW_CFA_advance_loc1
:
686 return "DW_CFA_advance_loc1";
687 case DW_CFA_advance_loc2
:
688 return "DW_CFA_advance_loc2";
689 case DW_CFA_advance_loc4
:
690 return "DW_CFA_advance_loc4";
691 case DW_CFA_offset_extended
:
692 return "DW_CFA_offset_extended";
693 case DW_CFA_restore_extended
:
694 return "DW_CFA_restore_extended";
695 case DW_CFA_undefined
:
696 return "DW_CFA_undefined";
697 case DW_CFA_same_value
:
698 return "DW_CFA_same_value";
699 case DW_CFA_register
:
700 return "DW_CFA_register";
701 case DW_CFA_remember_state
:
702 return "DW_CFA_remember_state";
703 case DW_CFA_restore_state
:
704 return "DW_CFA_restore_state";
706 return "DW_CFA_def_cfa";
707 case DW_CFA_def_cfa_register
:
708 return "DW_CFA_def_cfa_register";
709 case DW_CFA_def_cfa_offset
:
710 return "DW_CFA_def_cfa_offset";
712 /* SGI/MIPS specific */
713 case DW_CFA_MIPS_advance_loc8
:
714 return "DW_CFA_MIPS_advance_loc8";
717 case DW_CFA_GNU_window_save
:
718 return "DW_CFA_GNU_window_save";
719 case DW_CFA_GNU_args_size
:
720 return "DW_CFA_GNU_args_size";
723 return "DW_CFA_<unknown>";
727 /* Return a pointer to a newly allocated Call Frame Instruction. */
729 static inline dw_cfi_ref
732 register dw_cfi_ref cfi
= (dw_cfi_ref
) xmalloc (sizeof (dw_cfi_node
));
734 cfi
->dw_cfi_next
= NULL
;
735 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= 0;
736 cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
= 0;
741 /* Add a Call Frame Instruction to list of instructions. */
744 add_cfi (list_head
, cfi
)
745 register dw_cfi_ref
*list_head
;
746 register dw_cfi_ref cfi
;
748 register dw_cfi_ref
*p
;
750 /* Find the end of the chain. */
751 for (p
= list_head
; (*p
) != NULL
; p
= &(*p
)->dw_cfi_next
)
757 /* Generate a new label for the CFI info to refer to. */
760 dwarf2out_cfi_label ()
762 static char label
[20];
763 static unsigned long label_num
= 0;
765 ASM_GENERATE_INTERNAL_LABEL (label
, "LCFI", label_num
++);
766 ASM_OUTPUT_LABEL (asm_out_file
, label
);
771 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
772 or to the CIE if LABEL is NULL. */
775 add_fde_cfi (label
, cfi
)
776 register char *label
;
777 register dw_cfi_ref cfi
;
781 register dw_fde_ref fde
= &fde_table
[fde_table_in_use
- 1];
784 label
= dwarf2out_cfi_label ();
786 if (fde
->dw_fde_current_label
== NULL
787 || strcmp (label
, fde
->dw_fde_current_label
) != 0)
789 register dw_cfi_ref xcfi
;
791 fde
->dw_fde_current_label
= label
= xstrdup (label
);
793 /* Set the location counter to the new label. */
795 xcfi
->dw_cfi_opc
= DW_CFA_advance_loc4
;
796 xcfi
->dw_cfi_oprnd1
.dw_cfi_addr
= label
;
797 add_cfi (&fde
->dw_fde_cfi
, xcfi
);
800 add_cfi (&fde
->dw_fde_cfi
, cfi
);
804 add_cfi (&cie_cfi_head
, cfi
);
807 /* Subroutine of lookup_cfa. */
810 lookup_cfa_1 (cfi
, regp
, offsetp
)
811 register dw_cfi_ref cfi
;
812 register unsigned long *regp
;
813 register long *offsetp
;
815 switch (cfi
->dw_cfi_opc
)
817 case DW_CFA_def_cfa_offset
:
818 *offsetp
= cfi
->dw_cfi_oprnd1
.dw_cfi_offset
;
820 case DW_CFA_def_cfa_register
:
821 *regp
= cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
;
824 *regp
= cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
;
825 *offsetp
= cfi
->dw_cfi_oprnd2
.dw_cfi_offset
;
832 /* Find the previous value for the CFA. */
835 lookup_cfa (regp
, offsetp
)
836 register unsigned long *regp
;
837 register long *offsetp
;
839 register dw_cfi_ref cfi
;
841 *regp
= (unsigned long) -1;
844 for (cfi
= cie_cfi_head
; cfi
; cfi
= cfi
->dw_cfi_next
)
845 lookup_cfa_1 (cfi
, regp
, offsetp
);
847 if (fde_table_in_use
)
849 register dw_fde_ref fde
= &fde_table
[fde_table_in_use
- 1];
850 for (cfi
= fde
->dw_fde_cfi
; cfi
; cfi
= cfi
->dw_cfi_next
)
851 lookup_cfa_1 (cfi
, regp
, offsetp
);
855 /* The current rule for calculating the DWARF2 canonical frame address. */
856 static unsigned long cfa_reg
;
857 static long cfa_offset
;
859 /* The register used for saving registers to the stack, and its offset
861 static unsigned cfa_store_reg
;
862 static long cfa_store_offset
;
864 /* The running total of the size of arguments pushed onto the stack. */
865 static long args_size
;
867 /* The last args_size we actually output. */
868 static long old_args_size
;
870 /* Entry point to update the canonical frame address (CFA).
871 LABEL is passed to add_fde_cfi. The value of CFA is now to be
872 calculated from REG+OFFSET. */
875 dwarf2out_def_cfa (label
, reg
, offset
)
876 register char *label
;
877 register unsigned reg
;
878 register long offset
;
880 register dw_cfi_ref cfi
;
881 unsigned long old_reg
;
886 if (cfa_store_reg
== reg
)
887 cfa_store_offset
= offset
;
889 reg
= DWARF_FRAME_REGNUM (reg
);
890 lookup_cfa (&old_reg
, &old_offset
);
892 if (reg
== old_reg
&& offset
== old_offset
)
899 cfi
->dw_cfi_opc
= DW_CFA_def_cfa_offset
;
900 cfi
->dw_cfi_oprnd1
.dw_cfi_offset
= offset
;
903 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
904 else if (offset
== old_offset
&& old_reg
!= (unsigned long) -1)
906 cfi
->dw_cfi_opc
= DW_CFA_def_cfa_register
;
907 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
913 cfi
->dw_cfi_opc
= DW_CFA_def_cfa
;
914 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
915 cfi
->dw_cfi_oprnd2
.dw_cfi_offset
= offset
;
918 add_fde_cfi (label
, cfi
);
921 /* Add the CFI for saving a register. REG is the CFA column number.
922 LABEL is passed to add_fde_cfi.
923 If SREG is -1, the register is saved at OFFSET from the CFA;
924 otherwise it is saved in SREG. */
927 reg_save (label
, reg
, sreg
, offset
)
928 register char * label
;
929 register unsigned reg
;
930 register unsigned sreg
;
931 register long offset
;
933 register dw_cfi_ref cfi
= new_cfi ();
935 cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
= reg
;
937 /* The following comparison is correct. -1 is used to indicate that
938 the value isn't a register number. */
939 if (sreg
== (unsigned int) -1)
942 /* The register number won't fit in 6 bits, so we have to use
944 cfi
->dw_cfi_opc
= DW_CFA_offset_extended
;
946 cfi
->dw_cfi_opc
= DW_CFA_offset
;
948 offset
/= DWARF_CIE_DATA_ALIGNMENT
;
951 cfi
->dw_cfi_oprnd2
.dw_cfi_offset
= offset
;
955 cfi
->dw_cfi_opc
= DW_CFA_register
;
956 cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
= sreg
;
959 add_fde_cfi (label
, cfi
);
962 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
963 This CFI tells the unwinder that it needs to restore the window registers
964 from the previous frame's window save area.
966 ??? Perhaps we should note in the CIE where windows are saved (instead of
967 assuming 0(cfa)) and what registers are in the window. */
970 dwarf2out_window_save (label
)
971 register char * label
;
973 register dw_cfi_ref cfi
= new_cfi ();
974 cfi
->dw_cfi_opc
= DW_CFA_GNU_window_save
;
975 add_fde_cfi (label
, cfi
);
978 /* Add a CFI to update the running total of the size of arguments
979 pushed onto the stack. */
982 dwarf2out_args_size (label
, size
)
986 register dw_cfi_ref cfi
;
988 if (size
== old_args_size
)
990 old_args_size
= size
;
993 cfi
->dw_cfi_opc
= DW_CFA_GNU_args_size
;
994 cfi
->dw_cfi_oprnd1
.dw_cfi_offset
= size
;
995 add_fde_cfi (label
, cfi
);
998 /* Entry point for saving a register to the stack. REG is the GCC register
999 number. LABEL and OFFSET are passed to reg_save. */
1002 dwarf2out_reg_save (label
, reg
, offset
)
1003 register char * label
;
1004 register unsigned reg
;
1005 register long offset
;
1007 reg_save (label
, DWARF_FRAME_REGNUM (reg
), -1, offset
);
1010 /* Entry point for saving the return address in the stack.
1011 LABEL and OFFSET are passed to reg_save. */
1014 dwarf2out_return_save (label
, offset
)
1015 register char * label
;
1016 register long offset
;
1018 reg_save (label
, DWARF_FRAME_RETURN_COLUMN
, -1, offset
);
1021 /* Entry point for saving the return address in a register.
1022 LABEL and SREG are passed to reg_save. */
1025 dwarf2out_return_reg (label
, sreg
)
1026 register char * label
;
1027 register unsigned sreg
;
1029 reg_save (label
, DWARF_FRAME_RETURN_COLUMN
, sreg
, 0);
1032 /* Record the initial position of the return address. RTL is
1033 INCOMING_RETURN_ADDR_RTX. */
1036 initial_return_save (rtl
)
1042 switch (GET_CODE (rtl
))
1045 /* RA is in a register. */
1046 reg
= reg_number (rtl
);
1049 /* RA is on the stack. */
1050 rtl
= XEXP (rtl
, 0);
1051 switch (GET_CODE (rtl
))
1054 if (REGNO (rtl
) != STACK_POINTER_REGNUM
)
1059 if (REGNO (XEXP (rtl
, 0)) != STACK_POINTER_REGNUM
)
1061 offset
= INTVAL (XEXP (rtl
, 1));
1064 if (REGNO (XEXP (rtl
, 0)) != STACK_POINTER_REGNUM
)
1066 offset
= -INTVAL (XEXP (rtl
, 1));
1073 /* The return address is at some offset from any value we can
1074 actually load. For instance, on the SPARC it is in %i7+8. Just
1075 ignore the offset for now; it doesn't matter for unwinding frames. */
1076 if (GET_CODE (XEXP (rtl
, 1)) != CONST_INT
)
1078 initial_return_save (XEXP (rtl
, 0));
1084 reg_save (NULL
, DWARF_FRAME_RETURN_COLUMN
, reg
, offset
- cfa_offset
);
1087 /* Check INSN to see if it looks like a push or a stack adjustment, and
1088 make a note of it if it does. EH uses this information to find out how
1089 much extra space it needs to pop off the stack. */
1092 dwarf2out_stack_adjust (insn
)
1098 if (! asynchronous_exceptions
&& GET_CODE (insn
) == CALL_INSN
)
1100 /* Extract the size of the args from the CALL rtx itself. */
1102 insn
= PATTERN (insn
);
1103 if (GET_CODE (insn
) == PARALLEL
)
1104 insn
= XVECEXP (insn
, 0, 0);
1105 if (GET_CODE (insn
) == SET
)
1106 insn
= SET_SRC (insn
);
1107 assert (GET_CODE (insn
) == CALL
);
1108 dwarf2out_args_size ("", INTVAL (XEXP (insn
, 1)));
1112 /* If only calls can throw, and we have a frame pointer,
1113 save up adjustments until we see the CALL_INSN. */
1114 else if (! asynchronous_exceptions
1115 && cfa_reg
!= STACK_POINTER_REGNUM
)
1118 if (GET_CODE (insn
) == BARRIER
)
1120 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1121 the compiler will have already emitted a stack adjustment, but
1122 doesn't bother for calls to noreturn functions. */
1123 #ifdef STACK_GROWS_DOWNWARD
1124 offset
= -args_size
;
1129 else if (GET_CODE (PATTERN (insn
)) == SET
)
1134 insn
= PATTERN (insn
);
1135 src
= SET_SRC (insn
);
1136 dest
= SET_DEST (insn
);
1138 if (dest
== stack_pointer_rtx
)
1140 /* (set (reg sp) (plus (reg sp) (const_int))) */
1141 code
= GET_CODE (src
);
1142 if (! (code
== PLUS
|| code
== MINUS
)
1143 || XEXP (src
, 0) != stack_pointer_rtx
1144 || GET_CODE (XEXP (src
, 1)) != CONST_INT
)
1147 offset
= INTVAL (XEXP (src
, 1));
1149 else if (GET_CODE (dest
) == MEM
)
1151 /* (set (mem (pre_dec (reg sp))) (foo)) */
1152 src
= XEXP (dest
, 0);
1153 code
= GET_CODE (src
);
1155 if (! (code
== PRE_DEC
|| code
== PRE_INC
)
1156 || XEXP (src
, 0) != stack_pointer_rtx
)
1159 offset
= GET_MODE_SIZE (GET_MODE (dest
));
1164 if (code
== PLUS
|| code
== PRE_INC
)
1173 if (cfa_reg
== STACK_POINTER_REGNUM
)
1174 cfa_offset
+= offset
;
1176 #ifndef STACK_GROWS_DOWNWARD
1179 args_size
+= offset
;
1183 label
= dwarf2out_cfi_label ();
1184 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1185 dwarf2out_args_size (label
, args_size
);
1188 /* Record call frame debugging information for INSN, which either
1189 sets SP or FP (adjusting how we calculate the frame address) or saves a
1190 register to the stack. If INSN is NULL_RTX, initialize our state. */
1193 dwarf2out_frame_debug (insn
)
1200 /* A temporary register used in adjusting SP or setting up the store_reg. */
1201 static unsigned cfa_temp_reg
;
1202 static long cfa_temp_value
;
1204 if (insn
== NULL_RTX
)
1206 /* Set up state for generating call frame debug info. */
1207 lookup_cfa (&cfa_reg
, &cfa_offset
);
1208 if (cfa_reg
!= DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM
))
1210 cfa_reg
= STACK_POINTER_REGNUM
;
1211 cfa_store_reg
= cfa_reg
;
1212 cfa_store_offset
= cfa_offset
;
1218 if (! RTX_FRAME_RELATED_P (insn
))
1220 dwarf2out_stack_adjust (insn
);
1224 label
= dwarf2out_cfi_label ();
1226 src
= find_reg_note (insn
, REG_FRAME_RELATED_EXPR
, NULL_RTX
);
1228 insn
= XEXP (src
, 0);
1230 insn
= PATTERN (insn
);
1232 /* Assume that in a PARALLEL prologue insn, only the first elt is
1233 significant. Currently this is true. */
1234 if (GET_CODE (insn
) == PARALLEL
)
1235 insn
= XVECEXP (insn
, 0, 0);
1236 if (GET_CODE (insn
) != SET
)
1239 src
= SET_SRC (insn
);
1240 dest
= SET_DEST (insn
);
1242 switch (GET_CODE (dest
))
1245 /* Update the CFA rule wrt SP or FP. Make sure src is
1246 relative to the current CFA register. */
1247 switch (GET_CODE (src
))
1249 /* Setting FP from SP. */
1251 if (cfa_reg
!= REGNO (src
))
1253 if (REGNO (dest
) != STACK_POINTER_REGNUM
1254 && !(frame_pointer_needed
1255 && REGNO (dest
) == HARD_FRAME_POINTER_REGNUM
))
1257 cfa_reg
= REGNO (dest
);
1262 if (dest
== stack_pointer_rtx
)
1265 switch (GET_CODE (XEXP (src
, 1)))
1268 offset
= INTVAL (XEXP (src
, 1));
1271 if (REGNO (XEXP (src
, 1)) != cfa_temp_reg
)
1273 offset
= cfa_temp_value
;
1279 if (XEXP (src
, 0) == hard_frame_pointer_rtx
)
1281 /* Restoring SP from FP in the epilogue. */
1282 if (cfa_reg
!= HARD_FRAME_POINTER_REGNUM
)
1284 cfa_reg
= STACK_POINTER_REGNUM
;
1286 else if (XEXP (src
, 0) != stack_pointer_rtx
)
1289 if (GET_CODE (src
) == PLUS
)
1291 if (cfa_reg
== STACK_POINTER_REGNUM
)
1292 cfa_offset
+= offset
;
1293 if (cfa_store_reg
== STACK_POINTER_REGNUM
)
1294 cfa_store_offset
+= offset
;
1296 else if (dest
== hard_frame_pointer_rtx
)
1298 /* Either setting the FP from an offset of the SP,
1299 or adjusting the FP */
1300 if (! frame_pointer_needed
1301 || REGNO (dest
) != HARD_FRAME_POINTER_REGNUM
)
1304 if (XEXP (src
, 0) == stack_pointer_rtx
1305 && GET_CODE (XEXP (src
, 1)) == CONST_INT
)
1307 if (cfa_reg
!= STACK_POINTER_REGNUM
)
1309 offset
= INTVAL (XEXP (src
, 1));
1310 if (GET_CODE (src
) == PLUS
)
1312 cfa_offset
+= offset
;
1313 cfa_reg
= HARD_FRAME_POINTER_REGNUM
;
1315 else if (XEXP (src
, 0) == hard_frame_pointer_rtx
1316 && GET_CODE (XEXP (src
, 1)) == CONST_INT
)
1318 if (cfa_reg
!= HARD_FRAME_POINTER_REGNUM
)
1320 offset
= INTVAL (XEXP (src
, 1));
1321 if (GET_CODE (src
) == PLUS
)
1323 cfa_offset
+= offset
;
1331 if (GET_CODE (src
) != PLUS
1332 || XEXP (src
, 1) != stack_pointer_rtx
)
1334 if (GET_CODE (XEXP (src
, 0)) != REG
1335 || REGNO (XEXP (src
, 0)) != cfa_temp_reg
)
1337 if (cfa_reg
!= STACK_POINTER_REGNUM
)
1339 cfa_store_reg
= REGNO (dest
);
1340 cfa_store_offset
= cfa_offset
- cfa_temp_value
;
1345 cfa_temp_reg
= REGNO (dest
);
1346 cfa_temp_value
= INTVAL (src
);
1350 if (GET_CODE (XEXP (src
, 0)) != REG
1351 || REGNO (XEXP (src
, 0)) != cfa_temp_reg
1352 || REGNO (dest
) != cfa_temp_reg
1353 || GET_CODE (XEXP (src
, 1)) != CONST_INT
)
1355 cfa_temp_value
|= INTVAL (XEXP (src
, 1));
1361 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1365 /* Saving a register to the stack. Make sure dest is relative to the
1367 if (GET_CODE (src
) != REG
)
1369 switch (GET_CODE (XEXP (dest
, 0)))
1374 offset
= GET_MODE_SIZE (GET_MODE (dest
));
1375 if (GET_CODE (XEXP (dest
, 0)) == PRE_INC
)
1378 if (REGNO (XEXP (XEXP (dest
, 0), 0)) != STACK_POINTER_REGNUM
1379 || cfa_store_reg
!= STACK_POINTER_REGNUM
)
1381 cfa_store_offset
+= offset
;
1382 if (cfa_reg
== STACK_POINTER_REGNUM
)
1383 cfa_offset
= cfa_store_offset
;
1385 offset
= -cfa_store_offset
;
1388 /* With an offset. */
1391 offset
= INTVAL (XEXP (XEXP (dest
, 0), 1));
1392 if (GET_CODE (src
) == MINUS
)
1395 if (cfa_store_reg
!= REGNO (XEXP (XEXP (dest
, 0), 0)))
1397 offset
-= cfa_store_offset
;
1400 /* Without an offset. */
1402 if (cfa_store_reg
!= REGNO (XEXP (dest
, 0)))
1404 offset
= -cfa_store_offset
;
1410 dwarf2out_def_cfa (label
, cfa_reg
, cfa_offset
);
1411 dwarf2out_reg_save (label
, REGNO (src
), offset
);
1419 /* Return the size of an unsigned LEB128 quantity. */
1421 static inline unsigned long
1422 size_of_uleb128 (value
)
1423 register unsigned long value
;
1425 register unsigned long size
= 0;
1426 register unsigned byte
;
1430 byte
= (value
& 0x7f);
1439 /* Return the size of a signed LEB128 quantity. */
1441 static inline unsigned long
1442 size_of_sleb128 (value
)
1443 register long value
;
1445 register unsigned long size
= 0;
1446 register unsigned byte
;
1450 byte
= (value
& 0x7f);
1454 while (!(((value
== 0) && ((byte
& 0x40) == 0))
1455 || ((value
== -1) && ((byte
& 0x40) != 0))));
1460 /* Output an unsigned LEB128 quantity. */
1463 output_uleb128 (value
)
1464 register unsigned long value
;
1466 unsigned long save_value
= value
;
1468 fprintf (asm_out_file
, "\t%s\t", ASM_BYTE_OP
);
1471 register unsigned byte
= (value
& 0x7f);
1474 /* More bytes to follow. */
1477 fprintf (asm_out_file
, "0x%x", byte
);
1479 fprintf (asm_out_file
, ",");
1484 fprintf (asm_out_file
, "\t%s ULEB128 0x%lx", ASM_COMMENT_START
, save_value
);
1487 /* Output an signed LEB128 quantity. */
1490 output_sleb128 (value
)
1491 register long value
;
1494 register unsigned byte
;
1495 long save_value
= value
;
1497 fprintf (asm_out_file
, "\t%s\t", ASM_BYTE_OP
);
1500 byte
= (value
& 0x7f);
1501 /* arithmetic shift */
1503 more
= !((((value
== 0) && ((byte
& 0x40) == 0))
1504 || ((value
== -1) && ((byte
& 0x40) != 0))));
1508 fprintf (asm_out_file
, "0x%x", byte
);
1510 fprintf (asm_out_file
, ",");
1515 fprintf (asm_out_file
, "\t%s SLEB128 %ld", ASM_COMMENT_START
, save_value
);
1518 /* Output a Call Frame Information opcode and its operand(s). */
1521 output_cfi (cfi
, fde
)
1522 register dw_cfi_ref cfi
;
1523 register dw_fde_ref fde
;
1525 if (cfi
->dw_cfi_opc
== DW_CFA_advance_loc
)
1527 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1529 | (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
& 0x3f));
1531 fprintf (asm_out_file
, "\t%s DW_CFA_advance_loc 0x%lx",
1532 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1533 fputc ('\n', asm_out_file
);
1536 else if (cfi
->dw_cfi_opc
== DW_CFA_offset
)
1538 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1540 | (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
& 0x3f));
1542 fprintf (asm_out_file
, "\t%s DW_CFA_offset, column 0x%lx",
1543 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1545 fputc ('\n', asm_out_file
);
1546 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_offset
);
1547 fputc ('\n', asm_out_file
);
1549 else if (cfi
->dw_cfi_opc
== DW_CFA_restore
)
1551 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
1553 | (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
& 0x3f));
1555 fprintf (asm_out_file
, "\t%s DW_CFA_restore, column 0x%lx",
1556 ASM_COMMENT_START
, cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1558 fputc ('\n', asm_out_file
);
1562 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, cfi
->dw_cfi_opc
);
1564 fprintf (asm_out_file
, "\t%s %s", ASM_COMMENT_START
,
1565 dwarf_cfi_name (cfi
->dw_cfi_opc
));
1567 fputc ('\n', asm_out_file
);
1568 switch (cfi
->dw_cfi_opc
)
1570 case DW_CFA_set_loc
:
1571 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, cfi
->dw_cfi_oprnd1
.dw_cfi_addr
);
1572 fputc ('\n', asm_out_file
);
1574 case DW_CFA_advance_loc1
:
1575 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file
,
1576 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1577 fde
->dw_fde_current_label
);
1578 fputc ('\n', asm_out_file
);
1579 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1581 case DW_CFA_advance_loc2
:
1582 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
,
1583 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1584 fde
->dw_fde_current_label
);
1585 fputc ('\n', asm_out_file
);
1586 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1588 case DW_CFA_advance_loc4
:
1589 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
,
1590 cfi
->dw_cfi_oprnd1
.dw_cfi_addr
,
1591 fde
->dw_fde_current_label
);
1592 fputc ('\n', asm_out_file
);
1593 fde
->dw_fde_current_label
= cfi
->dw_cfi_oprnd1
.dw_cfi_addr
;
1595 #ifdef MIPS_DEBUGGING_INFO
1596 case DW_CFA_MIPS_advance_loc8
:
1597 /* TODO: not currently implemented. */
1601 case DW_CFA_offset_extended
:
1602 case DW_CFA_def_cfa
:
1603 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1604 fputc ('\n', asm_out_file
);
1605 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_offset
);
1606 fputc ('\n', asm_out_file
);
1608 case DW_CFA_restore_extended
:
1609 case DW_CFA_undefined
:
1610 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1611 fputc ('\n', asm_out_file
);
1613 case DW_CFA_same_value
:
1614 case DW_CFA_def_cfa_register
:
1615 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1616 fputc ('\n', asm_out_file
);
1618 case DW_CFA_register
:
1619 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_reg_num
);
1620 fputc ('\n', asm_out_file
);
1621 output_uleb128 (cfi
->dw_cfi_oprnd2
.dw_cfi_reg_num
);
1622 fputc ('\n', asm_out_file
);
1624 case DW_CFA_def_cfa_offset
:
1625 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1626 fputc ('\n', asm_out_file
);
1628 case DW_CFA_GNU_window_save
:
1630 case DW_CFA_GNU_args_size
:
1631 output_uleb128 (cfi
->dw_cfi_oprnd1
.dw_cfi_offset
);
1632 fputc ('\n', asm_out_file
);
1640 #if !defined (EH_FRAME_SECTION)
1641 #if defined (EH_FRAME_SECTION_ASM_OP)
1642 #define EH_FRAME_SECTION() eh_frame_section();
1644 #if defined (ASM_OUTPUT_SECTION_NAME)
1645 #define EH_FRAME_SECTION() \
1647 named_section (NULL_TREE, ".eh_frame", 0); \
1653 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
1654 #if !defined (HAS_INIT_SECTION) && !defined (INIT_SECTION_ASM_OP)
1655 #undef EH_FRAME_SECTION
1658 /* Output the call frame information used to used to record information
1659 that relates to calculating the frame pointer, and records the
1660 location of saved registers. */
1663 output_call_frame_info (for_eh
)
1666 register unsigned long i
;
1667 register dw_fde_ref fde
;
1668 register dw_cfi_ref cfi
;
1669 char l1
[20], l2
[20];
1670 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1674 /* Do we want to include a pointer to the exception table? */
1675 int eh_ptr
= for_eh
&& exception_table_p ();
1677 fputc ('\n', asm_out_file
);
1679 /* We're going to be generating comments, so turn on app. */
1685 #ifdef EH_FRAME_SECTION
1686 EH_FRAME_SECTION ();
1688 tree label
= get_file_function_name ('F');
1691 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1692 ASM_GLOBALIZE_LABEL (asm_out_file
, IDENTIFIER_POINTER (label
));
1693 ASM_OUTPUT_LABEL (asm_out_file
, IDENTIFIER_POINTER (label
));
1695 assemble_label ("__FRAME_BEGIN__");
1698 ASM_OUTPUT_SECTION (asm_out_file
, FRAME_SECTION
);
1700 /* Output the CIE. */
1701 ASM_GENERATE_INTERNAL_LABEL (l1
, CIE_AFTER_SIZE_LABEL
, for_eh
);
1702 ASM_GENERATE_INTERNAL_LABEL (l2
, CIE_END_LABEL
, for_eh
);
1703 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1704 ASM_GENERATE_INTERNAL_LABEL (ld
, CIE_LENGTH_LABEL
, for_eh
);
1706 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file
, ld
);
1708 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, ld
);
1711 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l2
, l1
);
1713 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l2
, l1
);
1716 fprintf (asm_out_file
, "\t%s Length of Common Information Entry",
1719 fputc ('\n', asm_out_file
);
1720 ASM_OUTPUT_LABEL (asm_out_file
, l1
);
1723 /* Now that the CIE pointer is PC-relative for EH,
1724 use 0 to identify the CIE. */
1725 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 0);
1727 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, DW_CIE_ID
);
1730 fprintf (asm_out_file
, "\t%s CIE Identifier Tag", ASM_COMMENT_START
);
1732 fputc ('\n', asm_out_file
);
1733 if (! for_eh
&& DWARF_OFFSET_SIZE
== 8)
1735 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, DW_CIE_ID
);
1736 fputc ('\n', asm_out_file
);
1739 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_CIE_VERSION
);
1741 fprintf (asm_out_file
, "\t%s CIE Version", ASM_COMMENT_START
);
1743 fputc ('\n', asm_out_file
);
1746 /* The CIE contains a pointer to the exception region info for the
1747 frame. Make the augmentation string three bytes (including the
1748 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1749 can't handle unaligned relocs. */
1752 ASM_OUTPUT_DWARF_STRING (asm_out_file
, "eh");
1753 fprintf (asm_out_file
, "\t%s CIE Augmentation", ASM_COMMENT_START
);
1757 ASM_OUTPUT_ASCII (asm_out_file
, "eh", 3);
1759 fputc ('\n', asm_out_file
);
1761 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, "__EXCEPTION_TABLE__");
1763 fprintf (asm_out_file
, "\t%s pointer to exception region info",
1768 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
1770 fprintf (asm_out_file
, "\t%s CIE Augmentation (none)",
1774 fputc ('\n', asm_out_file
);
1777 fprintf (asm_out_file
, " (CIE Code Alignment Factor)");
1779 fputc ('\n', asm_out_file
);
1780 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT
);
1782 fprintf (asm_out_file
, " (CIE Data Alignment Factor)");
1784 fputc ('\n', asm_out_file
);
1785 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_FRAME_RETURN_COLUMN
);
1787 fprintf (asm_out_file
, "\t%s CIE RA Column", ASM_COMMENT_START
);
1789 fputc ('\n', asm_out_file
);
1791 for (cfi
= cie_cfi_head
; cfi
!= NULL
; cfi
= cfi
->dw_cfi_next
)
1792 output_cfi (cfi
, NULL
);
1794 /* Pad the CIE out to an address sized boundary. */
1795 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1796 ASM_OUTPUT_LABEL (asm_out_file
, l2
);
1797 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1798 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file
, ld
, l2
, l1
);
1800 fprintf (asm_out_file
, "\t%s CIE Length Symbol", ASM_COMMENT_START
);
1801 fputc ('\n', asm_out_file
);
1804 /* Loop through all of the FDE's. */
1805 for (i
= 0; i
< fde_table_in_use
; ++i
)
1807 fde
= &fde_table
[i
];
1809 ASM_GENERATE_INTERNAL_LABEL (l1
, FDE_AFTER_SIZE_LABEL
, for_eh
+ i
*2);
1810 ASM_GENERATE_INTERNAL_LABEL (l2
, FDE_END_LABEL
, for_eh
+ i
*2);
1811 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1812 ASM_GENERATE_INTERNAL_LABEL (ld
, FDE_LENGTH_LABEL
, for_eh
+ i
*2);
1814 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file
, ld
);
1816 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, ld
);
1819 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file
, l2
, l1
);
1821 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l2
, l1
);
1824 fprintf (asm_out_file
, "\t%s FDE Length", ASM_COMMENT_START
);
1825 fputc ('\n', asm_out_file
);
1826 ASM_OUTPUT_LABEL (asm_out_file
, l1
);
1829 ASM_OUTPUT_DWARF_DELTA (asm_out_file
, l1
, "__FRAME_BEGIN__");
1831 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (FRAME_SECTION
));
1833 fprintf (asm_out_file
, "\t%s FDE CIE offset", ASM_COMMENT_START
);
1835 fputc ('\n', asm_out_file
);
1836 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, fde
->dw_fde_begin
);
1838 fprintf (asm_out_file
, "\t%s FDE initial location", ASM_COMMENT_START
);
1840 fputc ('\n', asm_out_file
);
1841 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
,
1842 fde
->dw_fde_end
, fde
->dw_fde_begin
);
1844 fprintf (asm_out_file
, "\t%s FDE address range", ASM_COMMENT_START
);
1846 fputc ('\n', asm_out_file
);
1848 /* Loop through the Call Frame Instructions associated with
1850 fde
->dw_fde_current_label
= fde
->dw_fde_begin
;
1851 for (cfi
= fde
->dw_fde_cfi
; cfi
!= NULL
; cfi
= cfi
->dw_cfi_next
)
1852 output_cfi (cfi
, fde
);
1854 /* Pad the FDE out to an address sized boundary. */
1855 ASM_OUTPUT_ALIGN (asm_out_file
, floor_log2 (PTR_SIZE
));
1856 ASM_OUTPUT_LABEL (asm_out_file
, l2
);
1857 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1858 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file
, ld
, l2
, l1
);
1860 fprintf (asm_out_file
, "\t%s FDE Length Symbol", ASM_COMMENT_START
);
1861 fputc ('\n', asm_out_file
);
1864 #ifndef EH_FRAME_SECTION
1867 /* Emit terminating zero for table. */
1868 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 0);
1869 fputc ('\n', asm_out_file
);
1872 #ifdef MIPS_DEBUGGING_INFO
1873 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1874 get a value of 0. Putting .align 0 after the label fixes it. */
1875 ASM_OUTPUT_ALIGN (asm_out_file
, 0);
1878 /* Turn off app to make assembly quicker. */
1883 /* Output a marker (i.e. a label) for the beginning of a function, before
1887 dwarf2out_begin_prologue ()
1889 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
1890 register dw_fde_ref fde
;
1892 ++current_funcdef_number
;
1894 function_section (current_function_decl
);
1895 ASM_GENERATE_INTERNAL_LABEL (label
, FUNC_BEGIN_LABEL
,
1896 current_funcdef_number
);
1897 ASM_OUTPUT_LABEL (asm_out_file
, label
);
1899 /* Expand the fde table if necessary. */
1900 if (fde_table_in_use
== fde_table_allocated
)
1902 fde_table_allocated
+= FDE_TABLE_INCREMENT
;
1904 = (dw_fde_ref
) xrealloc (fde_table
,
1905 fde_table_allocated
* sizeof (dw_fde_node
));
1908 /* Record the FDE associated with this function. */
1909 current_funcdef_fde
= fde_table_in_use
;
1911 /* Add the new FDE at the end of the fde_table. */
1912 fde
= &fde_table
[fde_table_in_use
++];
1913 fde
->dw_fde_begin
= xstrdup (label
);
1914 fde
->dw_fde_current_label
= NULL
;
1915 fde
->dw_fde_end
= NULL
;
1916 fde
->dw_fde_cfi
= NULL
;
1918 args_size
= old_args_size
= 0;
1921 /* Output a marker (i.e. a label) for the absolute end of the generated code
1922 for a function definition. This gets called *after* the epilogue code has
1926 dwarf2out_end_epilogue ()
1929 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
1931 /* Output a label to mark the endpoint of the code generated for this
1933 ASM_GENERATE_INTERNAL_LABEL (label
, FUNC_END_LABEL
, current_funcdef_number
);
1934 ASM_OUTPUT_LABEL (asm_out_file
, label
);
1935 fde
= &fde_table
[fde_table_in_use
- 1];
1936 fde
->dw_fde_end
= xstrdup (label
);
1940 dwarf2out_frame_init ()
1942 /* Allocate the initial hunk of the fde_table. */
1944 = (dw_fde_ref
) xmalloc (FDE_TABLE_INCREMENT
* sizeof (dw_fde_node
));
1945 bzero ((char *) fde_table
, FDE_TABLE_INCREMENT
* sizeof (dw_fde_node
));
1946 fde_table_allocated
= FDE_TABLE_INCREMENT
;
1947 fde_table_in_use
= 0;
1949 /* Generate the CFA instructions common to all FDE's. Do it now for the
1950 sake of lookup_cfa. */
1952 #ifdef DWARF2_UNWIND_INFO
1953 /* On entry, the Canonical Frame Address is at SP. */
1954 dwarf2out_def_cfa (NULL
, STACK_POINTER_REGNUM
, INCOMING_FRAME_SP_OFFSET
);
1955 initial_return_save (INCOMING_RETURN_ADDR_RTX
);
1960 dwarf2out_frame_finish ()
1962 /* Output call frame information. */
1963 #ifdef MIPS_DEBUGGING_INFO
1964 if (write_symbols
== DWARF2_DEBUG
)
1965 output_call_frame_info (0);
1966 if (flag_exceptions
&& ! exceptions_via_longjmp
)
1967 output_call_frame_info (1);
1969 if (write_symbols
== DWARF2_DEBUG
1970 || (flag_exceptions
&& ! exceptions_via_longjmp
))
1971 output_call_frame_info (1);
1975 #endif /* .debug_frame support */
1977 /* And now, the support for symbolic debugging information. */
1978 #ifdef DWARF2_DEBUGGING_INFO
1980 extern char *getpwd
PROTO((void));
1982 /* NOTE: In the comments in this file, many references are made to
1983 "Debugging Information Entries". This term is abbreviated as `DIE'
1984 throughout the remainder of this file. */
1986 /* An internal representation of the DWARF output is built, and then
1987 walked to generate the DWARF debugging info. The walk of the internal
1988 representation is done after the entire program has been compiled.
1989 The types below are used to describe the internal representation. */
1991 /* Each DIE may have a series of attribute/value pairs. Values
1992 can take on several forms. The forms that are used in this
1993 implementation are listed below. */
2000 dw_val_class_unsigned_const
,
2001 dw_val_class_long_long
,
2004 dw_val_class_die_ref
,
2005 dw_val_class_fde_ref
,
2006 dw_val_class_lbl_id
,
2007 dw_val_class_section_offset
,
2012 /* Various DIE's use offsets relative to the beginning of the
2013 .debug_info section to refer to each other. */
2015 typedef long int dw_offset
;
2017 /* Define typedefs here to avoid circular dependencies. */
2019 typedef struct die_struct
*dw_die_ref
;
2020 typedef struct dw_attr_struct
*dw_attr_ref
;
2021 typedef struct dw_val_struct
*dw_val_ref
;
2022 typedef struct dw_line_info_struct
*dw_line_info_ref
;
2023 typedef struct dw_separate_line_info_struct
*dw_separate_line_info_ref
;
2024 typedef struct dw_loc_descr_struct
*dw_loc_descr_ref
;
2025 typedef struct pubname_struct
*pubname_ref
;
2026 typedef dw_die_ref
*arange_ref
;
2028 /* Describe a double word constant value. */
2030 typedef struct dw_long_long_struct
2037 /* Describe a floating point constant value. */
2039 typedef struct dw_fp_struct
2046 /* Each entry in the line_info_table maintains the file and
2047 line number associated with the label generated for that
2048 entry. The label gives the PC value associated with
2049 the line number entry. */
2051 typedef struct dw_line_info_struct
2053 unsigned long dw_file_num
;
2054 unsigned long dw_line_num
;
2058 /* Line information for functions in separate sections; each one gets its
2060 typedef struct dw_separate_line_info_struct
2062 unsigned long dw_file_num
;
2063 unsigned long dw_line_num
;
2064 unsigned long function
;
2066 dw_separate_line_info_entry
;
2068 /* The dw_val_node describes an attribute's value, as it is
2069 represented internally. */
2071 typedef struct dw_val_struct
2073 dw_val_class val_class
;
2077 dw_loc_descr_ref val_loc
;
2079 long unsigned val_unsigned
;
2080 dw_long_long_const val_long_long
;
2081 dw_float_const val_float
;
2082 dw_die_ref val_die_ref
;
2083 unsigned val_fde_index
;
2087 unsigned char val_flag
;
2093 /* Locations in memory are described using a sequence of stack machine
2096 typedef struct dw_loc_descr_struct
2098 dw_loc_descr_ref dw_loc_next
;
2099 enum dwarf_location_atom dw_loc_opc
;
2100 dw_val_node dw_loc_oprnd1
;
2101 dw_val_node dw_loc_oprnd2
;
2105 /* Each DIE attribute has a field specifying the attribute kind,
2106 a link to the next attribute in the chain, and an attribute value.
2107 Attributes are typically linked below the DIE they modify. */
2109 typedef struct dw_attr_struct
2111 enum dwarf_attribute dw_attr
;
2112 dw_attr_ref dw_attr_next
;
2113 dw_val_node dw_attr_val
;
2117 /* The Debugging Information Entry (DIE) structure */
2119 typedef struct die_struct
2121 enum dwarf_tag die_tag
;
2122 dw_attr_ref die_attr
;
2123 dw_attr_ref die_attr_last
;
2124 dw_die_ref die_parent
;
2125 dw_die_ref die_child
;
2126 dw_die_ref die_child_last
;
2128 dw_offset die_offset
;
2129 unsigned long die_abbrev
;
2133 /* The pubname structure */
2135 typedef struct pubname_struct
2142 /* The limbo die list structure. */
2143 typedef struct limbo_die_struct
2146 struct limbo_die_struct
*next
;
2150 /* How to start an assembler comment. */
2151 #ifndef ASM_COMMENT_START
2152 #define ASM_COMMENT_START ";#"
2155 /* Define a macro which returns non-zero for a TYPE_DECL which was
2156 implicitly generated for a tagged type.
2158 Note that unlike the gcc front end (which generates a NULL named
2159 TYPE_DECL node for each complete tagged type, each array type, and
2160 each function type node created) the g++ front end generates a
2161 _named_ TYPE_DECL node for each tagged type node created.
2162 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
2163 generate a DW_TAG_typedef DIE for them. */
2165 #define TYPE_DECL_IS_STUB(decl) \
2166 (DECL_NAME (decl) == NULL_TREE \
2167 || (DECL_ARTIFICIAL (decl) \
2168 && is_tagged_type (TREE_TYPE (decl)) \
2169 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
2170 /* This is necessary for stub decls that \
2171 appear in nested inline functions. */ \
2172 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
2173 && (decl_ultimate_origin (decl) \
2174 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
2176 /* Information concerning the compilation unit's programming
2177 language, and compiler version. */
2179 extern int flag_traditional
;
2180 extern char *version_string
;
2181 extern char *language_string
;
2183 /* Fixed size portion of the DWARF compilation unit header. */
2184 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
2186 /* Fixed size portion of debugging line information prolog. */
2187 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
2189 /* Fixed size portion of public names info. */
2190 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
2192 /* Fixed size portion of the address range info. */
2193 #define DWARF_ARANGES_HEADER_SIZE \
2194 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, PTR_SIZE * 2) - DWARF_OFFSET_SIZE)
2196 /* Define the architecture-dependent minimum instruction length (in bytes).
2197 In this implementation of DWARF, this field is used for information
2198 purposes only. Since GCC generates assembly language, we have
2199 no a priori knowledge of how many instruction bytes are generated
2200 for each source line, and therefore can use only the DW_LNE_set_address
2201 and DW_LNS_fixed_advance_pc line information commands. */
2203 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
2204 #define DWARF_LINE_MIN_INSTR_LENGTH 4
2207 /* Minimum line offset in a special line info. opcode.
2208 This value was chosen to give a reasonable range of values. */
2209 #define DWARF_LINE_BASE -10
2211 /* First special line opcde - leave room for the standard opcodes. */
2212 #define DWARF_LINE_OPCODE_BASE 10
2214 /* Range of line offsets in a special line info. opcode. */
2215 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
2217 /* Flag that indicates the initial value of the is_stmt_start flag.
2218 In the present implementation, we do not mark any lines as
2219 the beginning of a source statement, because that information
2220 is not made available by the GCC front-end. */
2221 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
2223 /* This location is used by calc_die_sizes() to keep track
2224 the offset of each DIE within the .debug_info section. */
2225 static unsigned long next_die_offset
;
2227 /* Record the root of the DIE's built for the current compilation unit. */
2228 static dw_die_ref comp_unit_die
;
2230 /* A list of DIEs with a NULL parent waiting to be relocated. */
2231 static limbo_die_node
*limbo_die_list
= 0;
2233 /* Pointer to an array of filenames referenced by this compilation unit. */
2234 static char **file_table
;
2236 /* Total number of entries in the table (i.e. array) pointed to by
2237 `file_table'. This is the *total* and includes both used and unused
2239 static unsigned file_table_allocated
;
2241 /* Number of entries in the file_table which are actually in use. */
2242 static unsigned file_table_in_use
;
2244 /* Size (in elements) of increments by which we may expand the filename
2246 #define FILE_TABLE_INCREMENT 64
2248 /* Local pointer to the name of the main input file. Initialized in
2250 static char *primary_filename
;
2252 /* For Dwarf output, we must assign lexical-blocks id numbers in the order in
2253 which their beginnings are encountered. We output Dwarf debugging info
2254 that refers to the beginnings and ends of the ranges of code for each
2255 lexical block. The labels themselves are generated in final.c, which
2256 assigns numbers to the blocks in the same way. */
2257 static unsigned next_block_number
= 2;
2259 /* A pointer to the base of a table of references to DIE's that describe
2260 declarations. The table is indexed by DECL_UID() which is a unique
2261 number identifying each decl. */
2262 static dw_die_ref
*decl_die_table
;
2264 /* Number of elements currently allocated for the decl_die_table. */
2265 static unsigned decl_die_table_allocated
;
2267 /* Number of elements in decl_die_table currently in use. */
2268 static unsigned decl_die_table_in_use
;
2270 /* Size (in elements) of increments by which we may expand the
2272 #define DECL_DIE_TABLE_INCREMENT 256
2274 /* Structure used for the decl_scope table. scope is the current declaration
2275 scope, and previous is the entry that is the parent of this scope. This
2276 is usually but not always the immediately preceeding entry. */
2278 typedef struct decl_scope_struct
2285 /* A pointer to the base of a table of references to declaration
2286 scopes. This table is a display which tracks the nesting
2287 of declaration scopes at the current scope and containing
2288 scopes. This table is used to find the proper place to
2289 define type declaration DIE's. */
2290 static decl_scope_node
*decl_scope_table
;
2292 /* Number of elements currently allocated for the decl_scope_table. */
2293 static int decl_scope_table_allocated
;
2295 /* Current level of nesting of declaration scopes. */
2296 static int decl_scope_depth
;
2298 /* Size (in elements) of increments by which we may expand the
2299 decl_scope_table. */
2300 #define DECL_SCOPE_TABLE_INCREMENT 64
2302 /* A pointer to the base of a list of references to DIE's that
2303 are uniquely identified by their tag, presence/absence of
2304 children DIE's, and list of attribute/value pairs. */
2305 static dw_die_ref
*abbrev_die_table
;
2307 /* Number of elements currently allocated for abbrev_die_table. */
2308 static unsigned abbrev_die_table_allocated
;
2310 /* Number of elements in type_die_table currently in use. */
2311 static unsigned abbrev_die_table_in_use
;
2313 /* Size (in elements) of increments by which we may expand the
2314 abbrev_die_table. */
2315 #define ABBREV_DIE_TABLE_INCREMENT 256
2317 /* A pointer to the base of a table that contains line information
2318 for each source code line in .text in the compilation unit. */
2319 static dw_line_info_ref line_info_table
;
2321 /* Number of elements currently allocated for line_info_table. */
2322 static unsigned line_info_table_allocated
;
2324 /* Number of elements in separate_line_info_table currently in use. */
2325 static unsigned separate_line_info_table_in_use
;
2327 /* A pointer to the base of a table that contains line information
2328 for each source code line outside of .text in the compilation unit. */
2329 static dw_separate_line_info_ref separate_line_info_table
;
2331 /* Number of elements currently allocated for separate_line_info_table. */
2332 static unsigned separate_line_info_table_allocated
;
2334 /* Number of elements in line_info_table currently in use. */
2335 static unsigned line_info_table_in_use
;
2337 /* Size (in elements) of increments by which we may expand the
2339 #define LINE_INFO_TABLE_INCREMENT 1024
2341 /* A pointer to the base of a table that contains a list of publicly
2342 accessible names. */
2343 static pubname_ref pubname_table
;
2345 /* Number of elements currently allocated for pubname_table. */
2346 static unsigned pubname_table_allocated
;
2348 /* Number of elements in pubname_table currently in use. */
2349 static unsigned pubname_table_in_use
;
2351 /* Size (in elements) of increments by which we may expand the
2353 #define PUBNAME_TABLE_INCREMENT 64
2355 /* A pointer to the base of a table that contains a list of publicly
2356 accessible names. */
2357 static arange_ref arange_table
;
2359 /* Number of elements currently allocated for arange_table. */
2360 static unsigned arange_table_allocated
;
2362 /* Number of elements in arange_table currently in use. */
2363 static unsigned arange_table_in_use
;
2365 /* Size (in elements) of increments by which we may expand the
2367 #define ARANGE_TABLE_INCREMENT 64
2369 /* A pointer to the base of a list of pending types which we haven't
2370 generated DIEs for yet, but which we will have to come back to
2373 static tree
*pending_types_list
;
2375 /* Number of elements currently allocated for the pending_types_list. */
2376 static unsigned pending_types_allocated
;
2378 /* Number of elements of pending_types_list currently in use. */
2379 static unsigned pending_types
;
2381 /* Size (in elements) of increments by which we may expand the pending
2382 types list. Actually, a single hunk of space of this size should
2383 be enough for most typical programs. */
2384 #define PENDING_TYPES_INCREMENT 64
2386 /* Record whether the function being analyzed contains inlined functions. */
2387 static int current_function_has_inlines
;
2388 #if 0 && defined (MIPS_DEBUGGING_INFO)
2389 static int comp_unit_has_inlines
;
2392 /* A pointer to the ..._DECL node which we have most recently been working
2393 on. We keep this around just in case something about it looks screwy and
2394 we want to tell the user what the source coordinates for the actual
2396 static tree dwarf_last_decl
;
2398 /* Forward declarations for functions defined in this file. */
2400 static void addr_const_to_string
PROTO((dyn_string_t
, rtx
));
2401 static char *addr_to_string
PROTO((rtx
));
2402 static int is_pseudo_reg
PROTO((rtx
));
2403 static tree type_main_variant
PROTO((tree
));
2404 static int is_tagged_type
PROTO((tree
));
2405 static char *dwarf_tag_name
PROTO((unsigned));
2406 static char *dwarf_attr_name
PROTO((unsigned));
2407 static char *dwarf_form_name
PROTO((unsigned));
2408 static char *dwarf_stack_op_name
PROTO((unsigned));
2410 static char *dwarf_type_encoding_name
PROTO((unsigned));
2412 static tree decl_ultimate_origin
PROTO((tree
));
2413 static tree block_ultimate_origin
PROTO((tree
));
2414 static tree decl_class_context
PROTO((tree
));
2415 static void add_dwarf_attr
PROTO((dw_die_ref
, dw_attr_ref
));
2416 static void add_AT_flag
PROTO((dw_die_ref
,
2417 enum dwarf_attribute
,
2419 static void add_AT_int
PROTO((dw_die_ref
,
2420 enum dwarf_attribute
, long));
2421 static void add_AT_unsigned
PROTO((dw_die_ref
,
2422 enum dwarf_attribute
,
2424 static void add_AT_long_long
PROTO((dw_die_ref
,
2425 enum dwarf_attribute
,
2426 unsigned long, unsigned long));
2427 static void add_AT_float
PROTO((dw_die_ref
,
2428 enum dwarf_attribute
,
2430 static void add_AT_string
PROTO((dw_die_ref
,
2431 enum dwarf_attribute
, char *));
2432 static void add_AT_die_ref
PROTO((dw_die_ref
,
2433 enum dwarf_attribute
,
2435 static void add_AT_fde_ref
PROTO((dw_die_ref
,
2436 enum dwarf_attribute
,
2438 static void add_AT_loc
PROTO((dw_die_ref
,
2439 enum dwarf_attribute
,
2441 static void add_AT_addr
PROTO((dw_die_ref
,
2442 enum dwarf_attribute
, char *));
2443 static void add_AT_lbl_id
PROTO((dw_die_ref
,
2444 enum dwarf_attribute
, char *));
2445 static void add_AT_section_offset
PROTO((dw_die_ref
,
2446 enum dwarf_attribute
, char *));
2447 static int is_extern_subr_die
PROTO((dw_die_ref
));
2448 static dw_attr_ref get_AT
PROTO((dw_die_ref
,
2449 enum dwarf_attribute
));
2450 static char *get_AT_low_pc
PROTO((dw_die_ref
));
2451 static char *get_AT_hi_pc
PROTO((dw_die_ref
));
2452 static char *get_AT_string
PROTO((dw_die_ref
,
2453 enum dwarf_attribute
));
2454 static int get_AT_flag
PROTO((dw_die_ref
,
2455 enum dwarf_attribute
));
2456 static unsigned get_AT_unsigned
PROTO((dw_die_ref
,
2457 enum dwarf_attribute
));
2458 static int is_c_family
PROTO((void));
2459 static int is_fortran
PROTO((void));
2460 static void remove_AT
PROTO((dw_die_ref
,
2461 enum dwarf_attribute
));
2462 static void remove_children
PROTO((dw_die_ref
));
2463 static void add_child_die
PROTO((dw_die_ref
, dw_die_ref
));
2464 static dw_die_ref new_die
PROTO((enum dwarf_tag
, dw_die_ref
));
2465 static dw_die_ref lookup_type_die
PROTO((tree
));
2466 static void equate_type_number_to_die
PROTO((tree
, dw_die_ref
));
2467 static dw_die_ref lookup_decl_die
PROTO((tree
));
2468 static void equate_decl_number_to_die
PROTO((tree
, dw_die_ref
));
2469 static dw_loc_descr_ref new_loc_descr
PROTO((enum dwarf_location_atom
,
2470 unsigned long, unsigned long));
2471 static void add_loc_descr
PROTO((dw_loc_descr_ref
*,
2473 static void print_spaces
PROTO((FILE *));
2474 static void print_die
PROTO((dw_die_ref
, FILE *));
2475 static void print_dwarf_line_table
PROTO((FILE *));
2476 static void add_sibling_attributes
PROTO((dw_die_ref
));
2477 static void build_abbrev_table
PROTO((dw_die_ref
));
2478 static unsigned long size_of_string
PROTO((char *));
2479 static unsigned long size_of_loc_descr
PROTO((dw_loc_descr_ref
));
2480 static unsigned long size_of_locs
PROTO((dw_loc_descr_ref
));
2481 static int constant_size
PROTO((long unsigned));
2482 static unsigned long size_of_die
PROTO((dw_die_ref
));
2483 static void calc_die_sizes
PROTO((dw_die_ref
));
2484 static unsigned long size_of_line_prolog
PROTO((void));
2485 static unsigned long size_of_line_info
PROTO((void));
2486 static unsigned long size_of_pubnames
PROTO((void));
2487 static unsigned long size_of_aranges
PROTO((void));
2488 static enum dwarf_form value_format
PROTO((dw_val_ref
));
2489 static void output_value_format
PROTO((dw_val_ref
));
2490 static void output_abbrev_section
PROTO((void));
2491 static void output_loc_operands
PROTO((dw_loc_descr_ref
));
2492 static unsigned long sibling_offset
PROTO((dw_die_ref
));
2493 static void output_die
PROTO((dw_die_ref
));
2494 static void output_compilation_unit_header
PROTO((void));
2495 static char *dwarf2_name
PROTO((tree
, int));
2496 static void add_pubname
PROTO((tree
, dw_die_ref
));
2497 static void output_pubnames
PROTO((void));
2498 static void add_arange
PROTO((tree
, dw_die_ref
));
2499 static void output_aranges
PROTO((void));
2500 static void output_line_info
PROTO((void));
2501 static int is_body_block
PROTO((tree
));
2502 static dw_die_ref base_type_die
PROTO((tree
));
2503 static tree root_type
PROTO((tree
));
2504 static int is_base_type
PROTO((tree
));
2505 static dw_die_ref modified_type_die
PROTO((tree
, int, int, dw_die_ref
));
2506 static int type_is_enum
PROTO((tree
));
2507 static dw_loc_descr_ref reg_loc_descriptor
PROTO((rtx
));
2508 static dw_loc_descr_ref based_loc_descr
PROTO((unsigned, long));
2509 static int is_based_loc
PROTO((rtx
));
2510 static dw_loc_descr_ref mem_loc_descriptor
PROTO((rtx
));
2511 static dw_loc_descr_ref concat_loc_descriptor
PROTO((rtx
, rtx
));
2512 static dw_loc_descr_ref loc_descriptor
PROTO((rtx
));
2513 static unsigned ceiling
PROTO((unsigned, unsigned));
2514 static tree field_type
PROTO((tree
));
2515 static unsigned simple_type_align_in_bits
PROTO((tree
));
2516 static unsigned simple_type_size_in_bits
PROTO((tree
));
2517 static unsigned field_byte_offset
PROTO((tree
));
2518 static void add_AT_location_description
PROTO((dw_die_ref
,
2519 enum dwarf_attribute
, rtx
));
2520 static void add_data_member_location_attribute
PROTO((dw_die_ref
, tree
));
2521 static void add_const_value_attribute
PROTO((dw_die_ref
, rtx
));
2522 static void add_location_or_const_value_attribute
PROTO((dw_die_ref
, tree
));
2523 static void add_name_attribute
PROTO((dw_die_ref
, char *));
2524 static void add_bound_info
PROTO((dw_die_ref
,
2525 enum dwarf_attribute
, tree
));
2526 static void add_subscript_info
PROTO((dw_die_ref
, tree
));
2527 static void add_byte_size_attribute
PROTO((dw_die_ref
, tree
));
2528 static void add_bit_offset_attribute
PROTO((dw_die_ref
, tree
));
2529 static void add_bit_size_attribute
PROTO((dw_die_ref
, tree
));
2530 static void add_prototyped_attribute
PROTO((dw_die_ref
, tree
));
2531 static void add_abstract_origin_attribute
PROTO((dw_die_ref
, tree
));
2532 static void add_pure_or_virtual_attribute
PROTO((dw_die_ref
, tree
));
2533 static void add_src_coords_attributes
PROTO((dw_die_ref
, tree
));
2534 static void add_name_and_src_coords_attributes
PROTO((dw_die_ref
, tree
));
2535 static void push_decl_scope
PROTO((tree
));
2536 static dw_die_ref scope_die_for
PROTO((tree
, dw_die_ref
));
2537 static void pop_decl_scope
PROTO((void));
2538 static void add_type_attribute
PROTO((dw_die_ref
, tree
, int, int,
2540 static char *type_tag
PROTO((tree
));
2541 static tree member_declared_type
PROTO((tree
));
2543 static char *decl_start_label
PROTO((tree
));
2545 static void gen_array_type_die
PROTO((tree
, dw_die_ref
));
2546 static void gen_set_type_die
PROTO((tree
, dw_die_ref
));
2548 static void gen_entry_point_die
PROTO((tree
, dw_die_ref
));
2550 static void pend_type
PROTO((tree
));
2551 static void output_pending_types_for_scope
PROTO((dw_die_ref
));
2552 static void gen_inlined_enumeration_type_die
PROTO((tree
, dw_die_ref
));
2553 static void gen_inlined_structure_type_die
PROTO((tree
, dw_die_ref
));
2554 static void gen_inlined_union_type_die
PROTO((tree
, dw_die_ref
));
2555 static void gen_enumeration_type_die
PROTO((tree
, dw_die_ref
));
2556 static dw_die_ref gen_formal_parameter_die
PROTO((tree
, dw_die_ref
));
2557 static void gen_unspecified_parameters_die
PROTO((tree
, dw_die_ref
));
2558 static void gen_formal_types_die
PROTO((tree
, dw_die_ref
));
2559 static void gen_subprogram_die
PROTO((tree
, dw_die_ref
));
2560 static void gen_variable_die
PROTO((tree
, dw_die_ref
));
2561 static void gen_label_die
PROTO((tree
, dw_die_ref
));
2562 static void gen_lexical_block_die
PROTO((tree
, dw_die_ref
, int));
2563 static void gen_inlined_subroutine_die
PROTO((tree
, dw_die_ref
, int));
2564 static void gen_field_die
PROTO((tree
, dw_die_ref
));
2565 static void gen_ptr_to_mbr_type_die
PROTO((tree
, dw_die_ref
));
2566 static void gen_compile_unit_die
PROTO((char *));
2567 static void gen_string_type_die
PROTO((tree
, dw_die_ref
));
2568 static void gen_inheritance_die
PROTO((tree
, dw_die_ref
));
2569 static void gen_member_die
PROTO((tree
, dw_die_ref
));
2570 static void gen_struct_or_union_type_die
PROTO((tree
, dw_die_ref
));
2571 static void gen_subroutine_type_die
PROTO((tree
, dw_die_ref
));
2572 static void gen_typedef_die
PROTO((tree
, dw_die_ref
));
2573 static void gen_type_die
PROTO((tree
, dw_die_ref
));
2574 static void gen_tagged_type_instantiation_die
PROTO((tree
, dw_die_ref
));
2575 static void gen_block_die
PROTO((tree
, dw_die_ref
, int));
2576 static void decls_for_scope
PROTO((tree
, dw_die_ref
, int));
2577 static int is_redundant_typedef
PROTO((tree
));
2578 static void gen_decl_die
PROTO((tree
, dw_die_ref
));
2579 static unsigned lookup_filename
PROTO((char *));
2581 /* Section names used to hold DWARF debugging information. */
2582 #ifndef DEBUG_INFO_SECTION
2583 #define DEBUG_INFO_SECTION ".debug_info"
2585 #ifndef ABBREV_SECTION
2586 #define ABBREV_SECTION ".debug_abbrev"
2588 #ifndef ARANGES_SECTION
2589 #define ARANGES_SECTION ".debug_aranges"
2591 #ifndef DW_MACINFO_SECTION
2592 #define DW_MACINFO_SECTION ".debug_macinfo"
2594 #ifndef DEBUG_LINE_SECTION
2595 #define DEBUG_LINE_SECTION ".debug_line"
2598 #define LOC_SECTION ".debug_loc"
2600 #ifndef PUBNAMES_SECTION
2601 #define PUBNAMES_SECTION ".debug_pubnames"
2604 #define STR_SECTION ".debug_str"
2607 /* Standard ELF section names for compiled code and data. */
2608 #ifndef TEXT_SECTION
2609 #define TEXT_SECTION ".text"
2611 #ifndef DATA_SECTION
2612 #define DATA_SECTION ".data"
2615 #define BSS_SECTION ".bss"
2619 /* Definitions of defaults for formats and names of various special
2620 (artificial) labels which may be generated within this file (when the -g
2621 options is used and DWARF_DEBUGGING_INFO is in effect.
2622 If necessary, these may be overridden from within the tm.h file, but
2623 typically, overriding these defaults is unnecessary. */
2625 static char text_end_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
2627 #ifndef TEXT_END_LABEL
2628 #define TEXT_END_LABEL "Letext"
2630 #ifndef DATA_END_LABEL
2631 #define DATA_END_LABEL "Ledata"
2633 #ifndef BSS_END_LABEL
2634 #define BSS_END_LABEL "Lebss"
2636 #ifndef INSN_LABEL_FMT
2637 #define INSN_LABEL_FMT "LI%u_"
2639 #ifndef BLOCK_BEGIN_LABEL
2640 #define BLOCK_BEGIN_LABEL "LBB"
2642 #ifndef BLOCK_END_LABEL
2643 #define BLOCK_END_LABEL "LBE"
2645 #ifndef BODY_BEGIN_LABEL
2646 #define BODY_BEGIN_LABEL "Lbb"
2648 #ifndef BODY_END_LABEL
2649 #define BODY_END_LABEL "Lbe"
2651 #ifndef LINE_CODE_LABEL
2652 #define LINE_CODE_LABEL "LM"
2654 #ifndef SEPARATE_LINE_CODE_LABEL
2655 #define SEPARATE_LINE_CODE_LABEL "LSM"
2658 /* Convert a reference to the assembler name of a C-level name. This
2659 macro has the same effect as ASM_OUTPUT_LABELREF, but copies to
2660 a string rather than writing to a file. */
2661 #ifndef ASM_NAME_TO_STRING
2662 #define ASM_NAME_TO_STRING(STR, NAME) \
2664 if ((NAME)[0] == '*') \
2665 dyn_string_append (STR, NAME + 1); \
2667 dyn_string_append (STR, NAME); \
2672 /* Convert an integer constant expression into assembler syntax. Addition
2673 and subtraction are the only arithmetic that may appear in these
2674 expressions. This is an adaptation of output_addr_const in final.c.
2675 Here, the target of the conversion is a string buffer. We can't use
2676 output_addr_const directly, because it writes to a file. */
2679 addr_const_to_string (str
, x
)
2686 switch (GET_CODE (x
))
2690 dyn_string_append (str
, ",");
2696 ASM_NAME_TO_STRING (str
, XSTR (x
, 0));
2700 ASM_GENERATE_INTERNAL_LABEL (buf1
, "L", CODE_LABEL_NUMBER (XEXP (x
, 0)));
2701 ASM_NAME_TO_STRING (str
, buf1
);
2705 ASM_GENERATE_INTERNAL_LABEL (buf1
, "L", CODE_LABEL_NUMBER (x
));
2706 ASM_NAME_TO_STRING (str
, buf1
);
2710 sprintf (buf1
, HOST_WIDE_INT_PRINT_DEC
, INTVAL (x
));
2711 dyn_string_append (str
, buf1
);
2715 /* This used to output parentheses around the expression, but that does
2716 not work on the 386 (either ATT or BSD assembler). */
2717 addr_const_to_string (str
, XEXP (x
, 0));
2721 if (GET_MODE (x
) == VOIDmode
)
2723 /* We can use %d if the number is one word and positive. */
2724 if (CONST_DOUBLE_HIGH (x
))
2725 sprintf (buf1
, HOST_WIDE_INT_PRINT_DOUBLE_HEX
,
2726 CONST_DOUBLE_HIGH (x
), CONST_DOUBLE_LOW (x
));
2727 else if (CONST_DOUBLE_LOW (x
) < 0)
2728 sprintf (buf1
, HOST_WIDE_INT_PRINT_HEX
, CONST_DOUBLE_LOW (x
));
2730 sprintf (buf1
, HOST_WIDE_INT_PRINT_DEC
,
2731 CONST_DOUBLE_LOW (x
));
2732 dyn_string_append (str
, buf1
);
2735 /* We can't handle floating point constants; PRINT_OPERAND must
2737 output_operand_lossage ("floating constant misused");
2741 /* Some assemblers need integer constants to appear last (eg masm). */
2742 if (GET_CODE (XEXP (x
, 0)) == CONST_INT
)
2744 addr_const_to_string (str
, XEXP (x
, 1));
2745 if (INTVAL (XEXP (x
, 0)) >= 0)
2746 dyn_string_append (str
, "+");
2748 addr_const_to_string (str
, XEXP (x
, 0));
2752 addr_const_to_string (str
, XEXP (x
, 0));
2753 if (INTVAL (XEXP (x
, 1)) >= 0)
2754 dyn_string_append (str
, "+");
2756 addr_const_to_string (str
, XEXP (x
, 1));
2761 /* Avoid outputting things like x-x or x+5-x, since some assemblers
2762 can't handle that. */
2763 x
= simplify_subtraction (x
);
2764 if (GET_CODE (x
) != MINUS
)
2767 addr_const_to_string (str
, XEXP (x
, 0));
2768 dyn_string_append (str
, "-");
2769 if (GET_CODE (XEXP (x
, 1)) == CONST_INT
2770 && INTVAL (XEXP (x
, 1)) < 0)
2772 dyn_string_append (str
, ASM_OPEN_PAREN
);
2773 addr_const_to_string (str
, XEXP (x
, 1));
2774 dyn_string_append (str
, ASM_CLOSE_PAREN
);
2777 addr_const_to_string (str
, XEXP (x
, 1));
2782 addr_const_to_string (str
, XEXP (x
, 0));
2786 output_operand_lossage ("invalid expression as operand");
2790 /* Convert an address constant to a string, and return a pointer to
2791 a copy of the result, located on the heap. */
2797 dyn_string_t ds
= dyn_string_new (256);
2800 addr_const_to_string (ds
, x
);
2802 /* Return the dynamically allocated string, but free the
2803 dyn_string_t itself. */
2809 /* Test if rtl node points to a pseudo register. */
2815 return (((GET_CODE (rtl
) == REG
) && (REGNO (rtl
) >= FIRST_PSEUDO_REGISTER
))
2816 || ((GET_CODE (rtl
) == SUBREG
)
2817 && (REGNO (XEXP (rtl
, 0)) >= FIRST_PSEUDO_REGISTER
)));
2820 /* Return a reference to a type, with its const and volatile qualifiers
2824 type_main_variant (type
)
2827 type
= TYPE_MAIN_VARIANT (type
);
2829 /* There really should be only one main variant among any group of variants
2830 of a given type (and all of the MAIN_VARIANT values for all members of
2831 the group should point to that one type) but sometimes the C front-end
2832 messes this up for array types, so we work around that bug here. */
2834 if (TREE_CODE (type
) == ARRAY_TYPE
)
2835 while (type
!= TYPE_MAIN_VARIANT (type
))
2836 type
= TYPE_MAIN_VARIANT (type
);
2841 /* Return non-zero if the given type node represents a tagged type. */
2844 is_tagged_type (type
)
2847 register enum tree_code code
= TREE_CODE (type
);
2849 return (code
== RECORD_TYPE
|| code
== UNION_TYPE
2850 || code
== QUAL_UNION_TYPE
|| code
== ENUMERAL_TYPE
);
2853 /* Convert a DIE tag into its string name. */
2856 dwarf_tag_name (tag
)
2857 register unsigned tag
;
2861 case DW_TAG_padding
:
2862 return "DW_TAG_padding";
2863 case DW_TAG_array_type
:
2864 return "DW_TAG_array_type";
2865 case DW_TAG_class_type
:
2866 return "DW_TAG_class_type";
2867 case DW_TAG_entry_point
:
2868 return "DW_TAG_entry_point";
2869 case DW_TAG_enumeration_type
:
2870 return "DW_TAG_enumeration_type";
2871 case DW_TAG_formal_parameter
:
2872 return "DW_TAG_formal_parameter";
2873 case DW_TAG_imported_declaration
:
2874 return "DW_TAG_imported_declaration";
2876 return "DW_TAG_label";
2877 case DW_TAG_lexical_block
:
2878 return "DW_TAG_lexical_block";
2880 return "DW_TAG_member";
2881 case DW_TAG_pointer_type
:
2882 return "DW_TAG_pointer_type";
2883 case DW_TAG_reference_type
:
2884 return "DW_TAG_reference_type";
2885 case DW_TAG_compile_unit
:
2886 return "DW_TAG_compile_unit";
2887 case DW_TAG_string_type
:
2888 return "DW_TAG_string_type";
2889 case DW_TAG_structure_type
:
2890 return "DW_TAG_structure_type";
2891 case DW_TAG_subroutine_type
:
2892 return "DW_TAG_subroutine_type";
2893 case DW_TAG_typedef
:
2894 return "DW_TAG_typedef";
2895 case DW_TAG_union_type
:
2896 return "DW_TAG_union_type";
2897 case DW_TAG_unspecified_parameters
:
2898 return "DW_TAG_unspecified_parameters";
2899 case DW_TAG_variant
:
2900 return "DW_TAG_variant";
2901 case DW_TAG_common_block
:
2902 return "DW_TAG_common_block";
2903 case DW_TAG_common_inclusion
:
2904 return "DW_TAG_common_inclusion";
2905 case DW_TAG_inheritance
:
2906 return "DW_TAG_inheritance";
2907 case DW_TAG_inlined_subroutine
:
2908 return "DW_TAG_inlined_subroutine";
2910 return "DW_TAG_module";
2911 case DW_TAG_ptr_to_member_type
:
2912 return "DW_TAG_ptr_to_member_type";
2913 case DW_TAG_set_type
:
2914 return "DW_TAG_set_type";
2915 case DW_TAG_subrange_type
:
2916 return "DW_TAG_subrange_type";
2917 case DW_TAG_with_stmt
:
2918 return "DW_TAG_with_stmt";
2919 case DW_TAG_access_declaration
:
2920 return "DW_TAG_access_declaration";
2921 case DW_TAG_base_type
:
2922 return "DW_TAG_base_type";
2923 case DW_TAG_catch_block
:
2924 return "DW_TAG_catch_block";
2925 case DW_TAG_const_type
:
2926 return "DW_TAG_const_type";
2927 case DW_TAG_constant
:
2928 return "DW_TAG_constant";
2929 case DW_TAG_enumerator
:
2930 return "DW_TAG_enumerator";
2931 case DW_TAG_file_type
:
2932 return "DW_TAG_file_type";
2934 return "DW_TAG_friend";
2935 case DW_TAG_namelist
:
2936 return "DW_TAG_namelist";
2937 case DW_TAG_namelist_item
:
2938 return "DW_TAG_namelist_item";
2939 case DW_TAG_packed_type
:
2940 return "DW_TAG_packed_type";
2941 case DW_TAG_subprogram
:
2942 return "DW_TAG_subprogram";
2943 case DW_TAG_template_type_param
:
2944 return "DW_TAG_template_type_param";
2945 case DW_TAG_template_value_param
:
2946 return "DW_TAG_template_value_param";
2947 case DW_TAG_thrown_type
:
2948 return "DW_TAG_thrown_type";
2949 case DW_TAG_try_block
:
2950 return "DW_TAG_try_block";
2951 case DW_TAG_variant_part
:
2952 return "DW_TAG_variant_part";
2953 case DW_TAG_variable
:
2954 return "DW_TAG_variable";
2955 case DW_TAG_volatile_type
:
2956 return "DW_TAG_volatile_type";
2957 case DW_TAG_MIPS_loop
:
2958 return "DW_TAG_MIPS_loop";
2959 case DW_TAG_format_label
:
2960 return "DW_TAG_format_label";
2961 case DW_TAG_function_template
:
2962 return "DW_TAG_function_template";
2963 case DW_TAG_class_template
:
2964 return "DW_TAG_class_template";
2966 return "DW_TAG_<unknown>";
2970 /* Convert a DWARF attribute code into its string name. */
2973 dwarf_attr_name (attr
)
2974 register unsigned attr
;
2979 return "DW_AT_sibling";
2980 case DW_AT_location
:
2981 return "DW_AT_location";
2983 return "DW_AT_name";
2984 case DW_AT_ordering
:
2985 return "DW_AT_ordering";
2986 case DW_AT_subscr_data
:
2987 return "DW_AT_subscr_data";
2988 case DW_AT_byte_size
:
2989 return "DW_AT_byte_size";
2990 case DW_AT_bit_offset
:
2991 return "DW_AT_bit_offset";
2992 case DW_AT_bit_size
:
2993 return "DW_AT_bit_size";
2994 case DW_AT_element_list
:
2995 return "DW_AT_element_list";
2996 case DW_AT_stmt_list
:
2997 return "DW_AT_stmt_list";
2999 return "DW_AT_low_pc";
3001 return "DW_AT_high_pc";
3002 case DW_AT_language
:
3003 return "DW_AT_language";
3005 return "DW_AT_member";
3007 return "DW_AT_discr";
3008 case DW_AT_discr_value
:
3009 return "DW_AT_discr_value";
3010 case DW_AT_visibility
:
3011 return "DW_AT_visibility";
3013 return "DW_AT_import";
3014 case DW_AT_string_length
:
3015 return "DW_AT_string_length";
3016 case DW_AT_common_reference
:
3017 return "DW_AT_common_reference";
3018 case DW_AT_comp_dir
:
3019 return "DW_AT_comp_dir";
3020 case DW_AT_const_value
:
3021 return "DW_AT_const_value";
3022 case DW_AT_containing_type
:
3023 return "DW_AT_containing_type";
3024 case DW_AT_default_value
:
3025 return "DW_AT_default_value";
3027 return "DW_AT_inline";
3028 case DW_AT_is_optional
:
3029 return "DW_AT_is_optional";
3030 case DW_AT_lower_bound
:
3031 return "DW_AT_lower_bound";
3032 case DW_AT_producer
:
3033 return "DW_AT_producer";
3034 case DW_AT_prototyped
:
3035 return "DW_AT_prototyped";
3036 case DW_AT_return_addr
:
3037 return "DW_AT_return_addr";
3038 case DW_AT_start_scope
:
3039 return "DW_AT_start_scope";
3040 case DW_AT_stride_size
:
3041 return "DW_AT_stride_size";
3042 case DW_AT_upper_bound
:
3043 return "DW_AT_upper_bound";
3044 case DW_AT_abstract_origin
:
3045 return "DW_AT_abstract_origin";
3046 case DW_AT_accessibility
:
3047 return "DW_AT_accessibility";
3048 case DW_AT_address_class
:
3049 return "DW_AT_address_class";
3050 case DW_AT_artificial
:
3051 return "DW_AT_artificial";
3052 case DW_AT_base_types
:
3053 return "DW_AT_base_types";
3054 case DW_AT_calling_convention
:
3055 return "DW_AT_calling_convention";
3057 return "DW_AT_count";
3058 case DW_AT_data_member_location
:
3059 return "DW_AT_data_member_location";
3060 case DW_AT_decl_column
:
3061 return "DW_AT_decl_column";
3062 case DW_AT_decl_file
:
3063 return "DW_AT_decl_file";
3064 case DW_AT_decl_line
:
3065 return "DW_AT_decl_line";
3066 case DW_AT_declaration
:
3067 return "DW_AT_declaration";
3068 case DW_AT_discr_list
:
3069 return "DW_AT_discr_list";
3070 case DW_AT_encoding
:
3071 return "DW_AT_encoding";
3072 case DW_AT_external
:
3073 return "DW_AT_external";
3074 case DW_AT_frame_base
:
3075 return "DW_AT_frame_base";
3077 return "DW_AT_friend";
3078 case DW_AT_identifier_case
:
3079 return "DW_AT_identifier_case";
3080 case DW_AT_macro_info
:
3081 return "DW_AT_macro_info";
3082 case DW_AT_namelist_items
:
3083 return "DW_AT_namelist_items";
3084 case DW_AT_priority
:
3085 return "DW_AT_priority";
3087 return "DW_AT_segment";
3088 case DW_AT_specification
:
3089 return "DW_AT_specification";
3090 case DW_AT_static_link
:
3091 return "DW_AT_static_link";
3093 return "DW_AT_type";
3094 case DW_AT_use_location
:
3095 return "DW_AT_use_location";
3096 case DW_AT_variable_parameter
:
3097 return "DW_AT_variable_parameter";
3098 case DW_AT_virtuality
:
3099 return "DW_AT_virtuality";
3100 case DW_AT_vtable_elem_location
:
3101 return "DW_AT_vtable_elem_location";
3103 case DW_AT_MIPS_fde
:
3104 return "DW_AT_MIPS_fde";
3105 case DW_AT_MIPS_loop_begin
:
3106 return "DW_AT_MIPS_loop_begin";
3107 case DW_AT_MIPS_tail_loop_begin
:
3108 return "DW_AT_MIPS_tail_loop_begin";
3109 case DW_AT_MIPS_epilog_begin
:
3110 return "DW_AT_MIPS_epilog_begin";
3111 case DW_AT_MIPS_loop_unroll_factor
:
3112 return "DW_AT_MIPS_loop_unroll_factor";
3113 case DW_AT_MIPS_software_pipeline_depth
:
3114 return "DW_AT_MIPS_software_pipeline_depth";
3115 case DW_AT_MIPS_linkage_name
:
3116 return "DW_AT_MIPS_linkage_name";
3117 case DW_AT_MIPS_stride
:
3118 return "DW_AT_MIPS_stride";
3119 case DW_AT_MIPS_abstract_name
:
3120 return "DW_AT_MIPS_abstract_name";
3121 case DW_AT_MIPS_clone_origin
:
3122 return "DW_AT_MIPS_clone_origin";
3123 case DW_AT_MIPS_has_inlines
:
3124 return "DW_AT_MIPS_has_inlines";
3126 case DW_AT_sf_names
:
3127 return "DW_AT_sf_names";
3128 case DW_AT_src_info
:
3129 return "DW_AT_src_info";
3130 case DW_AT_mac_info
:
3131 return "DW_AT_mac_info";
3132 case DW_AT_src_coords
:
3133 return "DW_AT_src_coords";
3134 case DW_AT_body_begin
:
3135 return "DW_AT_body_begin";
3136 case DW_AT_body_end
:
3137 return "DW_AT_body_end";
3139 return "DW_AT_<unknown>";
3143 /* Convert a DWARF value form code into its string name. */
3146 dwarf_form_name (form
)
3147 register unsigned form
;
3152 return "DW_FORM_addr";
3153 case DW_FORM_block2
:
3154 return "DW_FORM_block2";
3155 case DW_FORM_block4
:
3156 return "DW_FORM_block4";
3158 return "DW_FORM_data2";
3160 return "DW_FORM_data4";
3162 return "DW_FORM_data8";
3163 case DW_FORM_string
:
3164 return "DW_FORM_string";
3166 return "DW_FORM_block";
3167 case DW_FORM_block1
:
3168 return "DW_FORM_block1";
3170 return "DW_FORM_data1";
3172 return "DW_FORM_flag";
3174 return "DW_FORM_sdata";
3176 return "DW_FORM_strp";
3178 return "DW_FORM_udata";
3179 case DW_FORM_ref_addr
:
3180 return "DW_FORM_ref_addr";
3182 return "DW_FORM_ref1";
3184 return "DW_FORM_ref2";
3186 return "DW_FORM_ref4";
3188 return "DW_FORM_ref8";
3189 case DW_FORM_ref_udata
:
3190 return "DW_FORM_ref_udata";
3191 case DW_FORM_indirect
:
3192 return "DW_FORM_indirect";
3194 return "DW_FORM_<unknown>";
3198 /* Convert a DWARF stack opcode into its string name. */
3201 dwarf_stack_op_name (op
)
3202 register unsigned op
;
3207 return "DW_OP_addr";
3209 return "DW_OP_deref";
3211 return "DW_OP_const1u";
3213 return "DW_OP_const1s";
3215 return "DW_OP_const2u";
3217 return "DW_OP_const2s";
3219 return "DW_OP_const4u";
3221 return "DW_OP_const4s";
3223 return "DW_OP_const8u";
3225 return "DW_OP_const8s";
3227 return "DW_OP_constu";
3229 return "DW_OP_consts";
3233 return "DW_OP_drop";
3235 return "DW_OP_over";
3237 return "DW_OP_pick";
3239 return "DW_OP_swap";
3243 return "DW_OP_xderef";
3251 return "DW_OP_minus";
3263 return "DW_OP_plus";
3264 case DW_OP_plus_uconst
:
3265 return "DW_OP_plus_uconst";
3271 return "DW_OP_shra";
3289 return "DW_OP_skip";
3291 return "DW_OP_lit0";
3293 return "DW_OP_lit1";
3295 return "DW_OP_lit2";
3297 return "DW_OP_lit3";
3299 return "DW_OP_lit4";
3301 return "DW_OP_lit5";
3303 return "DW_OP_lit6";
3305 return "DW_OP_lit7";
3307 return "DW_OP_lit8";
3309 return "DW_OP_lit9";
3311 return "DW_OP_lit10";
3313 return "DW_OP_lit11";
3315 return "DW_OP_lit12";
3317 return "DW_OP_lit13";
3319 return "DW_OP_lit14";
3321 return "DW_OP_lit15";
3323 return "DW_OP_lit16";
3325 return "DW_OP_lit17";
3327 return "DW_OP_lit18";
3329 return "DW_OP_lit19";
3331 return "DW_OP_lit20";
3333 return "DW_OP_lit21";
3335 return "DW_OP_lit22";
3337 return "DW_OP_lit23";
3339 return "DW_OP_lit24";
3341 return "DW_OP_lit25";
3343 return "DW_OP_lit26";
3345 return "DW_OP_lit27";
3347 return "DW_OP_lit28";
3349 return "DW_OP_lit29";
3351 return "DW_OP_lit30";
3353 return "DW_OP_lit31";
3355 return "DW_OP_reg0";
3357 return "DW_OP_reg1";
3359 return "DW_OP_reg2";
3361 return "DW_OP_reg3";
3363 return "DW_OP_reg4";
3365 return "DW_OP_reg5";
3367 return "DW_OP_reg6";
3369 return "DW_OP_reg7";
3371 return "DW_OP_reg8";
3373 return "DW_OP_reg9";
3375 return "DW_OP_reg10";
3377 return "DW_OP_reg11";
3379 return "DW_OP_reg12";
3381 return "DW_OP_reg13";
3383 return "DW_OP_reg14";
3385 return "DW_OP_reg15";
3387 return "DW_OP_reg16";
3389 return "DW_OP_reg17";
3391 return "DW_OP_reg18";
3393 return "DW_OP_reg19";
3395 return "DW_OP_reg20";
3397 return "DW_OP_reg21";
3399 return "DW_OP_reg22";
3401 return "DW_OP_reg23";
3403 return "DW_OP_reg24";
3405 return "DW_OP_reg25";
3407 return "DW_OP_reg26";
3409 return "DW_OP_reg27";
3411 return "DW_OP_reg28";
3413 return "DW_OP_reg29";
3415 return "DW_OP_reg30";
3417 return "DW_OP_reg31";
3419 return "DW_OP_breg0";
3421 return "DW_OP_breg1";
3423 return "DW_OP_breg2";
3425 return "DW_OP_breg3";
3427 return "DW_OP_breg4";
3429 return "DW_OP_breg5";
3431 return "DW_OP_breg6";
3433 return "DW_OP_breg7";
3435 return "DW_OP_breg8";
3437 return "DW_OP_breg9";
3439 return "DW_OP_breg10";
3441 return "DW_OP_breg11";
3443 return "DW_OP_breg12";
3445 return "DW_OP_breg13";
3447 return "DW_OP_breg14";
3449 return "DW_OP_breg15";
3451 return "DW_OP_breg16";
3453 return "DW_OP_breg17";
3455 return "DW_OP_breg18";
3457 return "DW_OP_breg19";
3459 return "DW_OP_breg20";
3461 return "DW_OP_breg21";
3463 return "DW_OP_breg22";
3465 return "DW_OP_breg23";
3467 return "DW_OP_breg24";
3469 return "DW_OP_breg25";
3471 return "DW_OP_breg26";
3473 return "DW_OP_breg27";
3475 return "DW_OP_breg28";
3477 return "DW_OP_breg29";
3479 return "DW_OP_breg30";
3481 return "DW_OP_breg31";
3483 return "DW_OP_regx";
3485 return "DW_OP_fbreg";
3487 return "DW_OP_bregx";
3489 return "DW_OP_piece";
3490 case DW_OP_deref_size
:
3491 return "DW_OP_deref_size";
3492 case DW_OP_xderef_size
:
3493 return "DW_OP_xderef_size";
3497 return "OP_<unknown>";
3501 /* Convert a DWARF type code into its string name. */
3505 dwarf_type_encoding_name (enc
)
3506 register unsigned enc
;
3510 case DW_ATE_address
:
3511 return "DW_ATE_address";
3512 case DW_ATE_boolean
:
3513 return "DW_ATE_boolean";
3514 case DW_ATE_complex_float
:
3515 return "DW_ATE_complex_float";
3517 return "DW_ATE_float";
3519 return "DW_ATE_signed";
3520 case DW_ATE_signed_char
:
3521 return "DW_ATE_signed_char";
3522 case DW_ATE_unsigned
:
3523 return "DW_ATE_unsigned";
3524 case DW_ATE_unsigned_char
:
3525 return "DW_ATE_unsigned_char";
3527 return "DW_ATE_<unknown>";
3532 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3533 instance of an inlined instance of a decl which is local to an inline
3534 function, so we have to trace all of the way back through the origin chain
3535 to find out what sort of node actually served as the original seed for the
3539 decl_ultimate_origin (decl
)
3542 #ifdef ENABLE_CHECKING
3543 if (DECL_FROM_INLINE (DECL_ORIGIN (decl
)))
3544 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
3545 most distant ancestor, this should never happen. */
3549 return DECL_ABSTRACT_ORIGIN (decl
);
3552 /* Determine the "ultimate origin" of a block. The block may be an inlined
3553 instance of an inlined instance of a block which is local to an inline
3554 function, so we have to trace all of the way back through the origin chain
3555 to find out what sort of node actually served as the original seed for the
3559 block_ultimate_origin (block
)
3560 register tree block
;
3562 register tree immediate_origin
= BLOCK_ABSTRACT_ORIGIN (block
);
3564 if (immediate_origin
== NULL_TREE
)
3568 register tree ret_val
;
3569 register tree lookahead
= immediate_origin
;
3573 ret_val
= lookahead
;
3574 lookahead
= (TREE_CODE (ret_val
) == BLOCK
)
3575 ? BLOCK_ABSTRACT_ORIGIN (ret_val
)
3578 while (lookahead
!= NULL
&& lookahead
!= ret_val
);
3584 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
3585 of a virtual function may refer to a base class, so we check the 'this'
3589 decl_class_context (decl
)
3592 tree context
= NULL_TREE
;
3594 if (TREE_CODE (decl
) != FUNCTION_DECL
|| ! DECL_VINDEX (decl
))
3595 context
= DECL_CONTEXT (decl
);
3597 context
= TYPE_MAIN_VARIANT
3598 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl
)))));
3600 if (context
&& TREE_CODE_CLASS (TREE_CODE (context
)) != 't')
3601 context
= NULL_TREE
;
3606 /* Add an attribute/value pair to a DIE */
3609 add_dwarf_attr (die
, attr
)
3610 register dw_die_ref die
;
3611 register dw_attr_ref attr
;
3613 if (die
!= NULL
&& attr
!= NULL
)
3615 if (die
->die_attr
== NULL
)
3617 die
->die_attr
= attr
;
3618 die
->die_attr_last
= attr
;
3622 die
->die_attr_last
->dw_attr_next
= attr
;
3623 die
->die_attr_last
= attr
;
3628 /* Add a flag value attribute to a DIE. */
3631 add_AT_flag (die
, attr_kind
, flag
)
3632 register dw_die_ref die
;
3633 register enum dwarf_attribute attr_kind
;
3634 register unsigned flag
;
3636 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3638 attr
->dw_attr_next
= NULL
;
3639 attr
->dw_attr
= attr_kind
;
3640 attr
->dw_attr_val
.val_class
= dw_val_class_flag
;
3641 attr
->dw_attr_val
.v
.val_flag
= flag
;
3642 add_dwarf_attr (die
, attr
);
3645 /* Add a signed integer attribute value to a DIE. */
3648 add_AT_int (die
, attr_kind
, int_val
)
3649 register dw_die_ref die
;
3650 register enum dwarf_attribute attr_kind
;
3651 register long int int_val
;
3653 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3655 attr
->dw_attr_next
= NULL
;
3656 attr
->dw_attr
= attr_kind
;
3657 attr
->dw_attr_val
.val_class
= dw_val_class_const
;
3658 attr
->dw_attr_val
.v
.val_int
= int_val
;
3659 add_dwarf_attr (die
, attr
);
3662 /* Add an unsigned integer attribute value to a DIE. */
3665 add_AT_unsigned (die
, attr_kind
, unsigned_val
)
3666 register dw_die_ref die
;
3667 register enum dwarf_attribute attr_kind
;
3668 register unsigned long unsigned_val
;
3670 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3672 attr
->dw_attr_next
= NULL
;
3673 attr
->dw_attr
= attr_kind
;
3674 attr
->dw_attr_val
.val_class
= dw_val_class_unsigned_const
;
3675 attr
->dw_attr_val
.v
.val_unsigned
= unsigned_val
;
3676 add_dwarf_attr (die
, attr
);
3679 /* Add an unsigned double integer attribute value to a DIE. */
3682 add_AT_long_long (die
, attr_kind
, val_hi
, val_low
)
3683 register dw_die_ref die
;
3684 register enum dwarf_attribute attr_kind
;
3685 register unsigned long val_hi
;
3686 register unsigned long val_low
;
3688 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3690 attr
->dw_attr_next
= NULL
;
3691 attr
->dw_attr
= attr_kind
;
3692 attr
->dw_attr_val
.val_class
= dw_val_class_long_long
;
3693 attr
->dw_attr_val
.v
.val_long_long
.hi
= val_hi
;
3694 attr
->dw_attr_val
.v
.val_long_long
.low
= val_low
;
3695 add_dwarf_attr (die
, attr
);
3698 /* Add a floating point attribute value to a DIE and return it. */
3701 add_AT_float (die
, attr_kind
, length
, array
)
3702 register dw_die_ref die
;
3703 register enum dwarf_attribute attr_kind
;
3704 register unsigned length
;
3705 register long *array
;
3707 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3709 attr
->dw_attr_next
= NULL
;
3710 attr
->dw_attr
= attr_kind
;
3711 attr
->dw_attr_val
.val_class
= dw_val_class_float
;
3712 attr
->dw_attr_val
.v
.val_float
.length
= length
;
3713 attr
->dw_attr_val
.v
.val_float
.array
= array
;
3714 add_dwarf_attr (die
, attr
);
3717 /* Add a string attribute value to a DIE. */
3720 add_AT_string (die
, attr_kind
, str
)
3721 register dw_die_ref die
;
3722 register enum dwarf_attribute attr_kind
;
3725 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3727 attr
->dw_attr_next
= NULL
;
3728 attr
->dw_attr
= attr_kind
;
3729 attr
->dw_attr_val
.val_class
= dw_val_class_str
;
3730 attr
->dw_attr_val
.v
.val_str
= xstrdup (str
);
3731 add_dwarf_attr (die
, attr
);
3734 /* Add a DIE reference attribute value to a DIE. */
3737 add_AT_die_ref (die
, attr_kind
, targ_die
)
3738 register dw_die_ref die
;
3739 register enum dwarf_attribute attr_kind
;
3740 register dw_die_ref targ_die
;
3742 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3744 attr
->dw_attr_next
= NULL
;
3745 attr
->dw_attr
= attr_kind
;
3746 attr
->dw_attr_val
.val_class
= dw_val_class_die_ref
;
3747 attr
->dw_attr_val
.v
.val_die_ref
= targ_die
;
3748 add_dwarf_attr (die
, attr
);
3751 /* Add an FDE reference attribute value to a DIE. */
3754 add_AT_fde_ref (die
, attr_kind
, targ_fde
)
3755 register dw_die_ref die
;
3756 register enum dwarf_attribute attr_kind
;
3757 register unsigned targ_fde
;
3759 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3761 attr
->dw_attr_next
= NULL
;
3762 attr
->dw_attr
= attr_kind
;
3763 attr
->dw_attr_val
.val_class
= dw_val_class_fde_ref
;
3764 attr
->dw_attr_val
.v
.val_fde_index
= targ_fde
;
3765 add_dwarf_attr (die
, attr
);
3768 /* Add a location description attribute value to a DIE. */
3771 add_AT_loc (die
, attr_kind
, loc
)
3772 register dw_die_ref die
;
3773 register enum dwarf_attribute attr_kind
;
3774 register dw_loc_descr_ref loc
;
3776 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3778 attr
->dw_attr_next
= NULL
;
3779 attr
->dw_attr
= attr_kind
;
3780 attr
->dw_attr_val
.val_class
= dw_val_class_loc
;
3781 attr
->dw_attr_val
.v
.val_loc
= loc
;
3782 add_dwarf_attr (die
, attr
);
3785 /* Add an address constant attribute value to a DIE. */
3788 add_AT_addr (die
, attr_kind
, addr
)
3789 register dw_die_ref die
;
3790 register enum dwarf_attribute attr_kind
;
3793 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3795 attr
->dw_attr_next
= NULL
;
3796 attr
->dw_attr
= attr_kind
;
3797 attr
->dw_attr_val
.val_class
= dw_val_class_addr
;
3798 attr
->dw_attr_val
.v
.val_addr
= addr
;
3799 add_dwarf_attr (die
, attr
);
3802 /* Add a label identifier attribute value to a DIE. */
3805 add_AT_lbl_id (die
, attr_kind
, lbl_id
)
3806 register dw_die_ref die
;
3807 register enum dwarf_attribute attr_kind
;
3808 register char *lbl_id
;
3810 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3812 attr
->dw_attr_next
= NULL
;
3813 attr
->dw_attr
= attr_kind
;
3814 attr
->dw_attr_val
.val_class
= dw_val_class_lbl_id
;
3815 attr
->dw_attr_val
.v
.val_lbl_id
= xstrdup (lbl_id
);
3816 add_dwarf_attr (die
, attr
);
3819 /* Add a section offset attribute value to a DIE. */
3822 add_AT_section_offset (die
, attr_kind
, section
)
3823 register dw_die_ref die
;
3824 register enum dwarf_attribute attr_kind
;
3825 register char *section
;
3827 register dw_attr_ref attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
3829 attr
->dw_attr_next
= NULL
;
3830 attr
->dw_attr
= attr_kind
;
3831 attr
->dw_attr_val
.val_class
= dw_val_class_section_offset
;
3832 attr
->dw_attr_val
.v
.val_section
= section
;
3833 add_dwarf_attr (die
, attr
);
3837 /* Test if die refers to an external subroutine. */
3840 is_extern_subr_die (die
)
3841 register dw_die_ref die
;
3843 register dw_attr_ref a
;
3844 register int is_subr
= FALSE
;
3845 register int is_extern
= FALSE
;
3847 if (die
!= NULL
&& die
->die_tag
== DW_TAG_subprogram
)
3850 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
3852 if (a
->dw_attr
== DW_AT_external
3853 && a
->dw_attr_val
.val_class
== dw_val_class_flag
3854 && a
->dw_attr_val
.v
.val_flag
!= 0)
3862 return is_subr
&& is_extern
;
3865 /* Get the attribute of type attr_kind. */
3867 static inline dw_attr_ref
3868 get_AT (die
, attr_kind
)
3869 register dw_die_ref die
;
3870 register enum dwarf_attribute attr_kind
;
3872 register dw_attr_ref a
;
3873 register dw_die_ref spec
= NULL
;
3877 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
3879 if (a
->dw_attr
== attr_kind
)
3882 if (a
->dw_attr
== DW_AT_specification
3883 || a
->dw_attr
== DW_AT_abstract_origin
)
3884 spec
= a
->dw_attr_val
.v
.val_die_ref
;
3888 return get_AT (spec
, attr_kind
);
3894 /* Return the "low pc" attribute value, typically associated with
3895 a subprogram DIE. Return null if the "low pc" attribute is
3896 either not prsent, or if it cannot be represented as an
3897 assembler label identifier. */
3899 static inline char *
3901 register dw_die_ref die
;
3903 register dw_attr_ref a
= get_AT (die
, DW_AT_low_pc
);
3905 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_lbl_id
)
3906 return a
->dw_attr_val
.v
.val_lbl_id
;
3911 /* Return the "high pc" attribute value, typically associated with
3912 a subprogram DIE. Return null if the "high pc" attribute is
3913 either not prsent, or if it cannot be represented as an
3914 assembler label identifier. */
3916 static inline char *
3918 register dw_die_ref die
;
3920 register dw_attr_ref a
= get_AT (die
, DW_AT_high_pc
);
3922 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_lbl_id
)
3923 return a
->dw_attr_val
.v
.val_lbl_id
;
3928 /* Return the value of the string attribute designated by ATTR_KIND, or
3929 NULL if it is not present. */
3931 static inline char *
3932 get_AT_string (die
, attr_kind
)
3933 register dw_die_ref die
;
3934 register enum dwarf_attribute attr_kind
;
3936 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3938 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_str
)
3939 return a
->dw_attr_val
.v
.val_str
;
3944 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
3945 if it is not present. */
3948 get_AT_flag (die
, attr_kind
)
3949 register dw_die_ref die
;
3950 register enum dwarf_attribute attr_kind
;
3952 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3954 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_flag
)
3955 return a
->dw_attr_val
.v
.val_flag
;
3960 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
3961 if it is not present. */
3963 static inline unsigned
3964 get_AT_unsigned (die
, attr_kind
)
3965 register dw_die_ref die
;
3966 register enum dwarf_attribute attr_kind
;
3968 register dw_attr_ref a
= get_AT (die
, attr_kind
);
3970 if (a
&& a
->dw_attr_val
.val_class
== dw_val_class_unsigned_const
)
3971 return a
->dw_attr_val
.v
.val_unsigned
;
3979 register unsigned lang
= get_AT_unsigned (comp_unit_die
, DW_AT_language
);
3981 return (lang
== DW_LANG_C
|| lang
== DW_LANG_C89
3982 || lang
== DW_LANG_C_plus_plus
);
3988 register unsigned lang
= get_AT_unsigned (comp_unit_die
, DW_AT_language
);
3990 return (lang
== DW_LANG_Fortran77
|| lang
== DW_LANG_Fortran90
);
3993 /* Remove the specified attribute if present. */
3996 remove_AT (die
, attr_kind
)
3997 register dw_die_ref die
;
3998 register enum dwarf_attribute attr_kind
;
4000 register dw_attr_ref a
;
4001 register dw_attr_ref removed
= NULL
;;
4005 if (die
->die_attr
->dw_attr
== attr_kind
)
4007 removed
= die
->die_attr
;
4008 if (die
->die_attr_last
== die
->die_attr
)
4009 die
->die_attr_last
= NULL
;
4011 die
->die_attr
= die
->die_attr
->dw_attr_next
;
4015 for (a
= die
->die_attr
; a
->dw_attr_next
!= NULL
;
4016 a
= a
->dw_attr_next
)
4017 if (a
->dw_attr_next
->dw_attr
== attr_kind
)
4019 removed
= a
->dw_attr_next
;
4020 if (die
->die_attr_last
== a
->dw_attr_next
)
4021 die
->die_attr_last
= a
;
4023 a
->dw_attr_next
= a
->dw_attr_next
->dw_attr_next
;
4032 /* Discard the children of this DIE. */
4035 remove_children (die
)
4036 register dw_die_ref die
;
4038 register dw_die_ref child_die
= die
->die_child
;
4040 die
->die_child
= NULL
;
4041 die
->die_child_last
= NULL
;
4043 while (child_die
!= NULL
)
4045 register dw_die_ref tmp_die
= child_die
;
4046 register dw_attr_ref a
;
4048 child_die
= child_die
->die_sib
;
4050 for (a
= tmp_die
->die_attr
; a
!= NULL
; )
4052 register dw_attr_ref tmp_a
= a
;
4054 a
= a
->dw_attr_next
;
4062 /* Add a child DIE below its parent. */
4065 add_child_die (die
, child_die
)
4066 register dw_die_ref die
;
4067 register dw_die_ref child_die
;
4069 if (die
!= NULL
&& child_die
!= NULL
)
4071 if (die
== child_die
)
4073 child_die
->die_parent
= die
;
4074 child_die
->die_sib
= NULL
;
4076 if (die
->die_child
== NULL
)
4078 die
->die_child
= child_die
;
4079 die
->die_child_last
= child_die
;
4083 die
->die_child_last
->die_sib
= child_die
;
4084 die
->die_child_last
= child_die
;
4089 /* Return a pointer to a newly created DIE node. */
4091 static inline dw_die_ref
4092 new_die (tag_value
, parent_die
)
4093 register enum dwarf_tag tag_value
;
4094 register dw_die_ref parent_die
;
4096 register dw_die_ref die
= (dw_die_ref
) xmalloc (sizeof (die_node
));
4098 die
->die_tag
= tag_value
;
4099 die
->die_abbrev
= 0;
4100 die
->die_offset
= 0;
4101 die
->die_child
= NULL
;
4102 die
->die_parent
= NULL
;
4103 die
->die_sib
= NULL
;
4104 die
->die_child_last
= NULL
;
4105 die
->die_attr
= NULL
;
4106 die
->die_attr_last
= NULL
;
4108 if (parent_die
!= NULL
)
4109 add_child_die (parent_die
, die
);
4112 limbo_die_node
*limbo_node
;
4114 limbo_node
= (limbo_die_node
*) xmalloc (sizeof (limbo_die_node
));
4115 limbo_node
->die
= die
;
4116 limbo_node
->next
= limbo_die_list
;
4117 limbo_die_list
= limbo_node
;
4123 /* Return the DIE associated with the given type specifier. */
4125 static inline dw_die_ref
4126 lookup_type_die (type
)
4129 return (dw_die_ref
) TYPE_SYMTAB_POINTER (type
);
4132 /* Equate a DIE to a given type specifier. */
4135 equate_type_number_to_die (type
, type_die
)
4137 register dw_die_ref type_die
;
4139 TYPE_SYMTAB_POINTER (type
) = (char *) type_die
;
4142 /* Return the DIE associated with a given declaration. */
4144 static inline dw_die_ref
4145 lookup_decl_die (decl
)
4148 register unsigned decl_id
= DECL_UID (decl
);
4150 return (decl_id
< decl_die_table_in_use
4151 ? decl_die_table
[decl_id
] : NULL
);
4154 /* Equate a DIE to a particular declaration. */
4157 equate_decl_number_to_die (decl
, decl_die
)
4159 register dw_die_ref decl_die
;
4161 register unsigned decl_id
= DECL_UID (decl
);
4162 register unsigned num_allocated
;
4164 if (decl_id
>= decl_die_table_allocated
)
4167 = ((decl_id
+ 1 + DECL_DIE_TABLE_INCREMENT
- 1)
4168 / DECL_DIE_TABLE_INCREMENT
)
4169 * DECL_DIE_TABLE_INCREMENT
;
4172 = (dw_die_ref
*) xrealloc (decl_die_table
,
4173 sizeof (dw_die_ref
) * num_allocated
);
4175 bzero ((char *) &decl_die_table
[decl_die_table_allocated
],
4176 (num_allocated
- decl_die_table_allocated
) * sizeof (dw_die_ref
));
4177 decl_die_table_allocated
= num_allocated
;
4180 if (decl_id
>= decl_die_table_in_use
)
4181 decl_die_table_in_use
= (decl_id
+ 1);
4183 decl_die_table
[decl_id
] = decl_die
;
4186 /* Return a pointer to a newly allocated location description. Location
4187 descriptions are simple expression terms that can be strung
4188 together to form more complicated location (address) descriptions. */
4190 static inline dw_loc_descr_ref
4191 new_loc_descr (op
, oprnd1
, oprnd2
)
4192 register enum dwarf_location_atom op
;
4193 register unsigned long oprnd1
;
4194 register unsigned long oprnd2
;
4196 register dw_loc_descr_ref descr
4197 = (dw_loc_descr_ref
) xmalloc (sizeof (dw_loc_descr_node
));
4199 descr
->dw_loc_next
= NULL
;
4200 descr
->dw_loc_opc
= op
;
4201 descr
->dw_loc_oprnd1
.val_class
= dw_val_class_unsigned_const
;
4202 descr
->dw_loc_oprnd1
.v
.val_unsigned
= oprnd1
;
4203 descr
->dw_loc_oprnd2
.val_class
= dw_val_class_unsigned_const
;
4204 descr
->dw_loc_oprnd2
.v
.val_unsigned
= oprnd2
;
4209 /* Add a location description term to a location description expression. */
4212 add_loc_descr (list_head
, descr
)
4213 register dw_loc_descr_ref
*list_head
;
4214 register dw_loc_descr_ref descr
;
4216 register dw_loc_descr_ref
*d
;
4218 /* Find the end of the chain. */
4219 for (d
= list_head
; (*d
) != NULL
; d
= &(*d
)->dw_loc_next
)
4225 /* Keep track of the number of spaces used to indent the
4226 output of the debugging routines that print the structure of
4227 the DIE internal representation. */
4228 static int print_indent
;
4230 /* Indent the line the number of spaces given by print_indent. */
4233 print_spaces (outfile
)
4236 fprintf (outfile
, "%*s", print_indent
, "");
4239 /* Print the information associated with a given DIE, and its children.
4240 This routine is a debugging aid only. */
4243 print_die (die
, outfile
)
4247 register dw_attr_ref a
;
4248 register dw_die_ref c
;
4250 print_spaces (outfile
);
4251 fprintf (outfile
, "DIE %4lu: %s\n",
4252 die
->die_offset
, dwarf_tag_name (die
->die_tag
));
4253 print_spaces (outfile
);
4254 fprintf (outfile
, " abbrev id: %lu", die
->die_abbrev
);
4255 fprintf (outfile
, " offset: %lu\n", die
->die_offset
);
4257 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
4259 print_spaces (outfile
);
4260 fprintf (outfile
, " %s: ", dwarf_attr_name (a
->dw_attr
));
4262 switch (a
->dw_attr_val
.val_class
)
4264 case dw_val_class_addr
:
4265 fprintf (outfile
, "address");
4267 case dw_val_class_loc
:
4268 fprintf (outfile
, "location descriptor");
4270 case dw_val_class_const
:
4271 fprintf (outfile
, "%ld", a
->dw_attr_val
.v
.val_int
);
4273 case dw_val_class_unsigned_const
:
4274 fprintf (outfile
, "%lu", a
->dw_attr_val
.v
.val_unsigned
);
4276 case dw_val_class_long_long
:
4277 fprintf (outfile
, "constant (%lu,%lu)",
4278 a
->dw_attr_val
.v
.val_long_long
.hi
,
4279 a
->dw_attr_val
.v
.val_long_long
.low
);
4281 case dw_val_class_float
:
4282 fprintf (outfile
, "floating-point constant");
4284 case dw_val_class_flag
:
4285 fprintf (outfile
, "%u", a
->dw_attr_val
.v
.val_flag
);
4287 case dw_val_class_die_ref
:
4288 if (a
->dw_attr_val
.v
.val_die_ref
!= NULL
)
4289 fprintf (outfile
, "die -> %lu",
4290 a
->dw_attr_val
.v
.val_die_ref
->die_offset
);
4292 fprintf (outfile
, "die -> <null>");
4294 case dw_val_class_lbl_id
:
4295 fprintf (outfile
, "label: %s", a
->dw_attr_val
.v
.val_lbl_id
);
4297 case dw_val_class_section_offset
:
4298 fprintf (outfile
, "section: %s", a
->dw_attr_val
.v
.val_section
);
4300 case dw_val_class_str
:
4301 if (a
->dw_attr_val
.v
.val_str
!= NULL
)
4302 fprintf (outfile
, "\"%s\"", a
->dw_attr_val
.v
.val_str
);
4304 fprintf (outfile
, "<null>");
4310 fprintf (outfile
, "\n");
4313 if (die
->die_child
!= NULL
)
4316 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4317 print_die (c
, outfile
);
4323 /* Print the contents of the source code line number correspondence table.
4324 This routine is a debugging aid only. */
4327 print_dwarf_line_table (outfile
)
4330 register unsigned i
;
4331 register dw_line_info_ref line_info
;
4333 fprintf (outfile
, "\n\nDWARF source line information\n");
4334 for (i
= 1; i
< line_info_table_in_use
; ++i
)
4336 line_info
= &line_info_table
[i
];
4337 fprintf (outfile
, "%5d: ", i
);
4338 fprintf (outfile
, "%-20s", file_table
[line_info
->dw_file_num
]);
4339 fprintf (outfile
, "%6ld", line_info
->dw_line_num
);
4340 fprintf (outfile
, "\n");
4343 fprintf (outfile
, "\n\n");
4346 /* Print the information collected for a given DIE. */
4349 debug_dwarf_die (die
)
4352 print_die (die
, stderr
);
4355 /* Print all DWARF information collected for the compilation unit.
4356 This routine is a debugging aid only. */
4362 print_die (comp_unit_die
, stderr
);
4363 print_dwarf_line_table (stderr
);
4366 /* Traverse the DIE, and add a sibling attribute if it may have the
4367 effect of speeding up access to siblings. To save some space,
4368 avoid generating sibling attributes for DIE's without children. */
4371 add_sibling_attributes(die
)
4372 register dw_die_ref die
;
4374 register dw_die_ref c
;
4375 register dw_attr_ref attr
;
4376 if (die
!= comp_unit_die
&& die
->die_child
!= NULL
)
4378 attr
= (dw_attr_ref
) xmalloc (sizeof (dw_attr_node
));
4379 attr
->dw_attr_next
= NULL
;
4380 attr
->dw_attr
= DW_AT_sibling
;
4381 attr
->dw_attr_val
.val_class
= dw_val_class_die_ref
;
4382 attr
->dw_attr_val
.v
.val_die_ref
= die
->die_sib
;
4384 /* Add the sibling link to the front of the attribute list. */
4385 attr
->dw_attr_next
= die
->die_attr
;
4386 if (die
->die_attr
== NULL
)
4387 die
->die_attr_last
= attr
;
4389 die
->die_attr
= attr
;
4392 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4393 add_sibling_attributes (c
);
4396 /* The format of each DIE (and its attribute value pairs)
4397 is encoded in an abbreviation table. This routine builds the
4398 abbreviation table and assigns a unique abbreviation id for
4399 each abbreviation entry. The children of each die are visited
4403 build_abbrev_table (die
)
4404 register dw_die_ref die
;
4406 register unsigned long abbrev_id
;
4407 register unsigned long n_alloc
;
4408 register dw_die_ref c
;
4409 register dw_attr_ref d_attr
, a_attr
;
4410 for (abbrev_id
= 1; abbrev_id
< abbrev_die_table_in_use
; ++abbrev_id
)
4412 register dw_die_ref abbrev
= abbrev_die_table
[abbrev_id
];
4414 if (abbrev
->die_tag
== die
->die_tag
)
4416 if ((abbrev
->die_child
!= NULL
) == (die
->die_child
!= NULL
))
4418 a_attr
= abbrev
->die_attr
;
4419 d_attr
= die
->die_attr
;
4421 while (a_attr
!= NULL
&& d_attr
!= NULL
)
4423 if ((a_attr
->dw_attr
!= d_attr
->dw_attr
)
4424 || (value_format (&a_attr
->dw_attr_val
)
4425 != value_format (&d_attr
->dw_attr_val
)))
4428 a_attr
= a_attr
->dw_attr_next
;
4429 d_attr
= d_attr
->dw_attr_next
;
4432 if (a_attr
== NULL
&& d_attr
== NULL
)
4438 if (abbrev_id
>= abbrev_die_table_in_use
)
4440 if (abbrev_die_table_in_use
>= abbrev_die_table_allocated
)
4442 n_alloc
= abbrev_die_table_allocated
+ ABBREV_DIE_TABLE_INCREMENT
;
4444 = (dw_die_ref
*) xrealloc (abbrev_die_table
,
4445 sizeof (dw_die_ref
) * n_alloc
);
4447 bzero ((char *) &abbrev_die_table
[abbrev_die_table_allocated
],
4448 (n_alloc
- abbrev_die_table_allocated
) * sizeof (dw_die_ref
));
4449 abbrev_die_table_allocated
= n_alloc
;
4452 ++abbrev_die_table_in_use
;
4453 abbrev_die_table
[abbrev_id
] = die
;
4456 die
->die_abbrev
= abbrev_id
;
4457 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4458 build_abbrev_table (c
);
4461 /* Return the size of a string, including the null byte.
4463 This used to treat backslashes as escapes, and hence they were not included
4464 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
4465 which treats a backslash as a backslash, escaping it if necessary, and hence
4466 we must include them in the count. */
4468 static unsigned long
4469 size_of_string (str
)
4472 return strlen (str
) + 1;
4475 /* Return the size of a location descriptor. */
4477 static unsigned long
4478 size_of_loc_descr (loc
)
4479 register dw_loc_descr_ref loc
;
4481 register unsigned long size
= 1;
4483 switch (loc
->dw_loc_opc
)
4505 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4508 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4513 case DW_OP_plus_uconst
:
4514 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4552 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4555 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4558 size
+= size_of_sleb128 (loc
->dw_loc_oprnd1
.v
.val_int
);
4561 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4562 size
+= size_of_sleb128 (loc
->dw_loc_oprnd2
.v
.val_int
);
4565 size
+= size_of_uleb128 (loc
->dw_loc_oprnd1
.v
.val_unsigned
);
4567 case DW_OP_deref_size
:
4568 case DW_OP_xderef_size
:
4578 /* Return the size of a series of location descriptors. */
4580 static unsigned long
4582 register dw_loc_descr_ref loc
;
4584 register unsigned long size
= 0;
4586 for (; loc
!= NULL
; loc
= loc
->dw_loc_next
)
4587 size
+= size_of_loc_descr (loc
);
4592 /* Return the power-of-two number of bytes necessary to represent VALUE. */
4595 constant_size (value
)
4596 long unsigned value
;
4603 log
= floor_log2 (value
);
4606 log
= 1 << (floor_log2 (log
) + 1);
4611 /* Return the size of a DIE, as it is represented in the
4612 .debug_info section. */
4614 static unsigned long
4616 register dw_die_ref die
;
4618 register unsigned long size
= 0;
4619 register dw_attr_ref a
;
4621 size
+= size_of_uleb128 (die
->die_abbrev
);
4622 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
4624 switch (a
->dw_attr_val
.val_class
)
4626 case dw_val_class_addr
:
4629 case dw_val_class_loc
:
4631 register unsigned long lsize
4632 = size_of_locs (a
->dw_attr_val
.v
.val_loc
);
4635 size
+= constant_size (lsize
);
4639 case dw_val_class_const
:
4642 case dw_val_class_unsigned_const
:
4643 size
+= constant_size (a
->dw_attr_val
.v
.val_unsigned
);
4645 case dw_val_class_long_long
:
4646 size
+= 1 + 8; /* block */
4648 case dw_val_class_float
:
4649 size
+= 1 + a
->dw_attr_val
.v
.val_float
.length
* 4; /* block */
4651 case dw_val_class_flag
:
4654 case dw_val_class_die_ref
:
4655 size
+= DWARF_OFFSET_SIZE
;
4657 case dw_val_class_fde_ref
:
4658 size
+= DWARF_OFFSET_SIZE
;
4660 case dw_val_class_lbl_id
:
4663 case dw_val_class_section_offset
:
4664 size
+= DWARF_OFFSET_SIZE
;
4666 case dw_val_class_str
:
4667 size
+= size_of_string (a
->dw_attr_val
.v
.val_str
);
4677 /* Size the debugging information associated with a given DIE.
4678 Visits the DIE's children recursively. Updates the global
4679 variable next_die_offset, on each time through. Uses the
4680 current value of next_die_offset to update the die_offset
4681 field in each DIE. */
4684 calc_die_sizes (die
)
4687 register dw_die_ref c
;
4688 die
->die_offset
= next_die_offset
;
4689 next_die_offset
+= size_of_die (die
);
4691 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
4694 if (die
->die_child
!= NULL
)
4695 /* Count the null byte used to terminate sibling lists. */
4696 next_die_offset
+= 1;
4699 /* Return the size of the line information prolog generated for the
4700 compilation unit. */
4702 static unsigned long
4703 size_of_line_prolog ()
4705 register unsigned long size
;
4706 register unsigned long ft_index
;
4708 size
= DWARF_LINE_PROLOG_HEADER_SIZE
;
4710 /* Count the size of the table giving number of args for each
4712 size
+= DWARF_LINE_OPCODE_BASE
- 1;
4714 /* Include directory table is empty (at present). Count only the
4715 null byte used to terminate the table. */
4718 for (ft_index
= 1; ft_index
< file_table_in_use
; ++ft_index
)
4720 /* File name entry. */
4721 size
+= size_of_string (file_table
[ft_index
]);
4723 /* Include directory index. */
4724 size
+= size_of_uleb128 (0);
4726 /* Modification time. */
4727 size
+= size_of_uleb128 (0);
4729 /* File length in bytes. */
4730 size
+= size_of_uleb128 (0);
4733 /* Count the file table terminator. */
4738 /* Return the size of the line information generated for this
4739 compilation unit. */
4741 static unsigned long
4742 size_of_line_info ()
4744 register unsigned long size
;
4745 register unsigned long lt_index
;
4746 register unsigned long current_line
;
4747 register long line_offset
;
4748 register long line_delta
;
4749 register unsigned long current_file
;
4750 register unsigned long function
;
4751 unsigned long size_of_set_address
;
4753 /* Size of a DW_LNE_set_address instruction. */
4754 size_of_set_address
= 1 + size_of_uleb128 (1 + PTR_SIZE
) + 1 + PTR_SIZE
;
4756 /* Version number. */
4759 /* Prolog length specifier. */
4760 size
+= DWARF_OFFSET_SIZE
;
4763 size
+= size_of_line_prolog ();
4765 /* Set address register instruction. */
4766 size
+= size_of_set_address
;
4770 for (lt_index
= 1; lt_index
< line_info_table_in_use
; ++lt_index
)
4772 register dw_line_info_ref line_info
;
4774 /* Advance pc instruction. */
4775 /* ??? See the DW_LNS_advance_pc comment in output_line_info. */
4779 size
+= size_of_set_address
;
4781 line_info
= &line_info_table
[lt_index
];
4782 if (line_info
->dw_file_num
!= current_file
)
4784 /* Set file number instruction. */
4786 current_file
= line_info
->dw_file_num
;
4787 size
+= size_of_uleb128 (current_file
);
4790 if (line_info
->dw_line_num
!= current_line
)
4792 line_offset
= line_info
->dw_line_num
- current_line
;
4793 line_delta
= line_offset
- DWARF_LINE_BASE
;
4794 current_line
= line_info
->dw_line_num
;
4795 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
4796 /* 1-byte special line number instruction. */
4800 /* Advance line instruction. */
4802 size
+= size_of_sleb128 (line_offset
);
4803 /* Generate line entry instruction. */
4809 /* Advance pc instruction. */
4813 size
+= size_of_set_address
;
4815 /* End of line number info. marker. */
4816 size
+= 1 + size_of_uleb128 (1) + 1;
4821 for (lt_index
= 0; lt_index
< separate_line_info_table_in_use
; )
4823 register dw_separate_line_info_ref line_info
4824 = &separate_line_info_table
[lt_index
];
4825 if (function
!= line_info
->function
)
4827 function
= line_info
->function
;
4828 /* Set address register instruction. */
4829 size
+= size_of_set_address
;
4833 /* Advance pc instruction. */
4837 size
+= size_of_set_address
;
4840 if (line_info
->dw_file_num
!= current_file
)
4842 /* Set file number instruction. */
4844 current_file
= line_info
->dw_file_num
;
4845 size
+= size_of_uleb128 (current_file
);
4848 if (line_info
->dw_line_num
!= current_line
)
4850 line_offset
= line_info
->dw_line_num
- current_line
;
4851 line_delta
= line_offset
- DWARF_LINE_BASE
;
4852 current_line
= line_info
->dw_line_num
;
4853 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
4854 /* 1-byte special line number instruction. */
4858 /* Advance line instruction. */
4860 size
+= size_of_sleb128 (line_offset
);
4862 /* Generate line entry instruction. */
4869 /* If we're done with a function, end its sequence. */
4870 if (lt_index
== separate_line_info_table_in_use
4871 || separate_line_info_table
[lt_index
].function
!= function
)
4876 /* Advance pc instruction. */
4880 size
+= size_of_set_address
;
4882 /* End of line number info. marker. */
4883 size
+= 1 + size_of_uleb128 (1) + 1;
4890 /* Return the size of the .debug_pubnames table generated for the
4891 compilation unit. */
4893 static unsigned long
4896 register unsigned long size
;
4897 register unsigned i
;
4899 size
= DWARF_PUBNAMES_HEADER_SIZE
;
4900 for (i
= 0; i
< pubname_table_in_use
; ++i
)
4902 register pubname_ref p
= &pubname_table
[i
];
4903 size
+= DWARF_OFFSET_SIZE
+ size_of_string (p
->name
);
4906 size
+= DWARF_OFFSET_SIZE
;
4910 /* Return the size of the information in the .debug_aranges section. */
4912 static unsigned long
4915 register unsigned long size
;
4917 size
= DWARF_ARANGES_HEADER_SIZE
;
4919 /* Count the address/length pair for this compilation unit. */
4920 size
+= 2 * PTR_SIZE
;
4921 size
+= 2 * PTR_SIZE
* arange_table_in_use
;
4923 /* Count the two zero words used to terminated the address range table. */
4924 size
+= 2 * PTR_SIZE
;
4928 /* Select the encoding of an attribute value. */
4930 static enum dwarf_form
4934 switch (v
->val_class
)
4936 case dw_val_class_addr
:
4937 return DW_FORM_addr
;
4938 case dw_val_class_loc
:
4939 switch (constant_size (size_of_locs (v
->v
.val_loc
)))
4942 return DW_FORM_block1
;
4944 return DW_FORM_block2
;
4948 case dw_val_class_const
:
4949 return DW_FORM_data4
;
4950 case dw_val_class_unsigned_const
:
4951 switch (constant_size (v
->v
.val_unsigned
))
4954 return DW_FORM_data1
;
4956 return DW_FORM_data2
;
4958 return DW_FORM_data4
;
4960 return DW_FORM_data8
;
4964 case dw_val_class_long_long
:
4965 return DW_FORM_block1
;
4966 case dw_val_class_float
:
4967 return DW_FORM_block1
;
4968 case dw_val_class_flag
:
4969 return DW_FORM_flag
;
4970 case dw_val_class_die_ref
:
4972 case dw_val_class_fde_ref
:
4973 return DW_FORM_data
;
4974 case dw_val_class_lbl_id
:
4975 return DW_FORM_addr
;
4976 case dw_val_class_section_offset
:
4977 return DW_FORM_data
;
4978 case dw_val_class_str
:
4979 return DW_FORM_string
;
4985 /* Output the encoding of an attribute value. */
4988 output_value_format (v
)
4991 enum dwarf_form form
= value_format (v
);
4993 output_uleb128 (form
);
4995 fprintf (asm_out_file
, " (%s)", dwarf_form_name (form
));
4997 fputc ('\n', asm_out_file
);
5000 /* Output the .debug_abbrev section which defines the DIE abbreviation
5004 output_abbrev_section ()
5006 unsigned long abbrev_id
;
5009 for (abbrev_id
= 1; abbrev_id
< abbrev_die_table_in_use
; ++abbrev_id
)
5011 register dw_die_ref abbrev
= abbrev_die_table
[abbrev_id
];
5013 output_uleb128 (abbrev_id
);
5015 fprintf (asm_out_file
, " (abbrev code)");
5017 fputc ('\n', asm_out_file
);
5018 output_uleb128 (abbrev
->die_tag
);
5020 fprintf (asm_out_file
, " (TAG: %s)",
5021 dwarf_tag_name (abbrev
->die_tag
));
5023 fputc ('\n', asm_out_file
);
5024 fprintf (asm_out_file
, "\t%s\t0x%x", ASM_BYTE_OP
,
5025 abbrev
->die_child
!= NULL
? DW_children_yes
: DW_children_no
);
5028 fprintf (asm_out_file
, "\t%s %s",
5030 (abbrev
->die_child
!= NULL
5031 ? "DW_children_yes" : "DW_children_no"));
5033 fputc ('\n', asm_out_file
);
5035 for (a_attr
= abbrev
->die_attr
; a_attr
!= NULL
;
5036 a_attr
= a_attr
->dw_attr_next
)
5038 output_uleb128 (a_attr
->dw_attr
);
5040 fprintf (asm_out_file
, " (%s)",
5041 dwarf_attr_name (a_attr
->dw_attr
));
5043 fputc ('\n', asm_out_file
);
5044 output_value_format (&a_attr
->dw_attr_val
);
5047 fprintf (asm_out_file
, "\t%s\t0,0\n", ASM_BYTE_OP
);
5051 /* Output location description stack opcode's operands (if any). */
5054 output_loc_operands (loc
)
5055 register dw_loc_descr_ref loc
;
5057 register dw_val_ref val1
= &loc
->dw_loc_oprnd1
;
5058 register dw_val_ref val2
= &loc
->dw_loc_oprnd2
;
5060 switch (loc
->dw_loc_opc
)
5063 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file
, val1
->v
.val_addr
);
5064 fputc ('\n', asm_out_file
);
5068 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_flag
);
5069 fputc ('\n', asm_out_file
);
5073 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, val1
->v
.val_int
);
5074 fputc ('\n', asm_out_file
);
5078 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, val1
->v
.val_int
);
5079 fputc ('\n', asm_out_file
);
5084 fputc ('\n', asm_out_file
);
5087 output_uleb128 (val1
->v
.val_unsigned
);
5088 fputc ('\n', asm_out_file
);
5091 output_sleb128 (val1
->v
.val_int
);
5092 fputc ('\n', asm_out_file
);
5095 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_int
);
5096 fputc ('\n', asm_out_file
);
5098 case DW_OP_plus_uconst
:
5099 output_uleb128 (val1
->v
.val_unsigned
);
5100 fputc ('\n', asm_out_file
);
5104 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, val1
->v
.val_int
);
5105 fputc ('\n', asm_out_file
);
5139 output_sleb128 (val1
->v
.val_int
);
5140 fputc ('\n', asm_out_file
);
5143 output_uleb128 (val1
->v
.val_unsigned
);
5144 fputc ('\n', asm_out_file
);
5147 output_sleb128 (val1
->v
.val_int
);
5148 fputc ('\n', asm_out_file
);
5151 output_uleb128 (val1
->v
.val_unsigned
);
5152 fputc ('\n', asm_out_file
);
5153 output_sleb128 (val2
->v
.val_int
);
5154 fputc ('\n', asm_out_file
);
5157 output_uleb128 (val1
->v
.val_unsigned
);
5158 fputc ('\n', asm_out_file
);
5160 case DW_OP_deref_size
:
5161 case DW_OP_xderef_size
:
5162 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, val1
->v
.val_flag
);
5163 fputc ('\n', asm_out_file
);
5170 /* Compute the offset of a sibling. */
5172 static unsigned long
5173 sibling_offset (die
)
5176 unsigned long offset
;
5178 if (die
->die_child_last
== NULL
)
5179 offset
= die
->die_offset
+ size_of_die (die
);
5181 offset
= sibling_offset (die
->die_child_last
) + 1;
5186 /* Output the DIE and its attributes. Called recursively to generate
5187 the definitions of each child DIE. */
5191 register dw_die_ref die
;
5193 register dw_attr_ref a
;
5194 register dw_die_ref c
;
5195 register unsigned long ref_offset
;
5196 register unsigned long size
;
5197 register dw_loc_descr_ref loc
;
5200 output_uleb128 (die
->die_abbrev
);
5202 fprintf (asm_out_file
, " (DIE (0x%lx) %s)",
5203 die
->die_offset
, dwarf_tag_name (die
->die_tag
));
5205 fputc ('\n', asm_out_file
);
5207 for (a
= die
->die_attr
; a
!= NULL
; a
= a
->dw_attr_next
)
5209 switch (a
->dw_attr_val
.val_class
)
5211 case dw_val_class_addr
:
5212 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file
,
5213 a
->dw_attr_val
.v
.val_addr
);
5216 case dw_val_class_loc
:
5217 size
= size_of_locs (a
->dw_attr_val
.v
.val_loc
);
5219 /* Output the block length for this list of location operations. */
5220 switch (constant_size (size
))
5223 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, size
);
5226 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, size
);
5233 fprintf (asm_out_file
, "\t%s %s",
5234 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5236 fputc ('\n', asm_out_file
);
5237 for (loc
= a
->dw_attr_val
.v
.val_loc
; loc
!= NULL
;
5238 loc
= loc
->dw_loc_next
)
5240 /* Output the opcode. */
5241 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, loc
->dw_loc_opc
);
5243 fprintf (asm_out_file
, "\t%s %s", ASM_COMMENT_START
,
5244 dwarf_stack_op_name (loc
->dw_loc_opc
));
5246 fputc ('\n', asm_out_file
);
5248 /* Output the operand(s) (if any). */
5249 output_loc_operands (loc
);
5253 case dw_val_class_const
:
5254 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, a
->dw_attr_val
.v
.val_int
);
5257 case dw_val_class_unsigned_const
:
5258 switch (constant_size (a
->dw_attr_val
.v
.val_unsigned
))
5261 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5262 a
->dw_attr_val
.v
.val_unsigned
);
5265 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
,
5266 a
->dw_attr_val
.v
.val_unsigned
);
5269 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
,
5270 a
->dw_attr_val
.v
.val_unsigned
);
5273 ASM_OUTPUT_DWARF_DATA8 (asm_out_file
,
5274 a
->dw_attr_val
.v
.val_long_long
.hi
,
5275 a
->dw_attr_val
.v
.val_long_long
.low
);
5282 case dw_val_class_long_long
:
5283 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 8);
5285 fprintf (asm_out_file
, "\t%s %s",
5286 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5288 fputc ('\n', asm_out_file
);
5289 ASM_OUTPUT_DWARF_DATA8 (asm_out_file
,
5290 a
->dw_attr_val
.v
.val_long_long
.hi
,
5291 a
->dw_attr_val
.v
.val_long_long
.low
);
5294 fprintf (asm_out_file
,
5295 "\t%s long long constant", ASM_COMMENT_START
);
5297 fputc ('\n', asm_out_file
);
5300 case dw_val_class_float
:
5301 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5302 a
->dw_attr_val
.v
.val_float
.length
* 4);
5304 fprintf (asm_out_file
, "\t%s %s",
5305 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5307 fputc ('\n', asm_out_file
);
5308 for (i
= 0; i
< a
->dw_attr_val
.v
.val_float
.length
; ++i
)
5310 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
,
5311 a
->dw_attr_val
.v
.val_float
.array
[i
]);
5313 fprintf (asm_out_file
, "\t%s fp constant word %d",
5314 ASM_COMMENT_START
, i
);
5316 fputc ('\n', asm_out_file
);
5320 case dw_val_class_flag
:
5321 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, a
->dw_attr_val
.v
.val_flag
);
5324 case dw_val_class_die_ref
:
5325 if (a
->dw_attr_val
.v
.val_die_ref
!= NULL
)
5326 ref_offset
= a
->dw_attr_val
.v
.val_die_ref
->die_offset
;
5327 else if (a
->dw_attr
== DW_AT_sibling
)
5328 ref_offset
= sibling_offset(die
);
5332 ASM_OUTPUT_DWARF_DATA (asm_out_file
, ref_offset
);
5335 case dw_val_class_fde_ref
:
5338 ASM_GENERATE_INTERNAL_LABEL
5339 (l1
, FDE_AFTER_SIZE_LABEL
, a
->dw_attr_val
.v
.val_fde_index
* 2);
5340 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, l1
);
5341 fprintf (asm_out_file
, " - %d", DWARF_OFFSET_SIZE
);
5345 case dw_val_class_lbl_id
:
5346 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, a
->dw_attr_val
.v
.val_lbl_id
);
5349 case dw_val_class_section_offset
:
5350 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
,
5352 (a
->dw_attr_val
.v
.val_section
));
5355 case dw_val_class_str
:
5357 ASM_OUTPUT_DWARF_STRING (asm_out_file
, a
->dw_attr_val
.v
.val_str
);
5359 ASM_OUTPUT_ASCII (asm_out_file
,
5360 a
->dw_attr_val
.v
.val_str
,
5361 strlen (a
->dw_attr_val
.v
.val_str
) + 1);
5368 if (a
->dw_attr_val
.val_class
!= dw_val_class_loc
5369 && a
->dw_attr_val
.val_class
!= dw_val_class_long_long
5370 && a
->dw_attr_val
.val_class
!= dw_val_class_float
)
5373 fprintf (asm_out_file
, "\t%s %s",
5374 ASM_COMMENT_START
, dwarf_attr_name (a
->dw_attr
));
5376 fputc ('\n', asm_out_file
);
5380 for (c
= die
->die_child
; c
!= NULL
; c
= c
->die_sib
)
5383 if (die
->die_child
!= NULL
)
5385 /* Add null byte to terminate sibling list. */
5386 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5388 fprintf (asm_out_file
, "\t%s end of children of DIE 0x%lx",
5389 ASM_COMMENT_START
, die
->die_offset
);
5391 fputc ('\n', asm_out_file
);
5395 /* Output the compilation unit that appears at the beginning of the
5396 .debug_info section, and precedes the DIE descriptions. */
5399 output_compilation_unit_header ()
5401 ASM_OUTPUT_DWARF_DATA (asm_out_file
, next_die_offset
- DWARF_OFFSET_SIZE
);
5403 fprintf (asm_out_file
, "\t%s Length of Compilation Unit Info.",
5406 fputc ('\n', asm_out_file
);
5407 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5409 fprintf (asm_out_file
, "\t%s DWARF version number", ASM_COMMENT_START
);
5411 fputc ('\n', asm_out_file
);
5412 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (ABBREV_SECTION
));
5414 fprintf (asm_out_file
, "\t%s Offset Into Abbrev. Section",
5417 fputc ('\n', asm_out_file
);
5418 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, PTR_SIZE
);
5420 fprintf (asm_out_file
, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START
);
5422 fputc ('\n', asm_out_file
);
5425 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5426 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5427 argument list, and maybe the scope. */
5430 dwarf2_name (decl
, scope
)
5434 return (*decl_printable_name
) (decl
, scope
? 1 : 0);
5437 /* Add a new entry to .debug_pubnames if appropriate. */
5440 add_pubname (decl
, die
)
5446 if (! TREE_PUBLIC (decl
))
5449 if (pubname_table_in_use
== pubname_table_allocated
)
5451 pubname_table_allocated
+= PUBNAME_TABLE_INCREMENT
;
5452 pubname_table
= (pubname_ref
) xrealloc
5453 (pubname_table
, pubname_table_allocated
* sizeof (pubname_entry
));
5456 p
= &pubname_table
[pubname_table_in_use
++];
5459 p
->name
= xstrdup (dwarf2_name (decl
, 1));
5462 /* Output the public names table used to speed up access to externally
5463 visible names. For now, only generate entries for externally
5464 visible procedures. */
5469 register unsigned i
;
5470 register unsigned long pubnames_length
= size_of_pubnames ();
5472 ASM_OUTPUT_DWARF_DATA (asm_out_file
, pubnames_length
);
5475 fprintf (asm_out_file
, "\t%s Length of Public Names Info.",
5478 fputc ('\n', asm_out_file
);
5479 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5482 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5484 fputc ('\n', asm_out_file
);
5485 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (DEBUG_INFO_SECTION
));
5487 fprintf (asm_out_file
, "\t%s Offset of Compilation Unit Info.",
5490 fputc ('\n', asm_out_file
);
5491 ASM_OUTPUT_DWARF_DATA (asm_out_file
, next_die_offset
);
5493 fprintf (asm_out_file
, "\t%s Compilation Unit Length", ASM_COMMENT_START
);
5495 fputc ('\n', asm_out_file
);
5496 for (i
= 0; i
< pubname_table_in_use
; ++i
)
5498 register pubname_ref pub
= &pubname_table
[i
];
5500 ASM_OUTPUT_DWARF_DATA (asm_out_file
, pub
->die
->die_offset
);
5502 fprintf (asm_out_file
, "\t%s DIE offset", ASM_COMMENT_START
);
5504 fputc ('\n', asm_out_file
);
5508 ASM_OUTPUT_DWARF_STRING (asm_out_file
, pub
->name
);
5509 fprintf (asm_out_file
, "%s external name", ASM_COMMENT_START
);
5513 ASM_OUTPUT_ASCII (asm_out_file
, pub
->name
, strlen (pub
->name
) + 1);
5516 fputc ('\n', asm_out_file
);
5519 ASM_OUTPUT_DWARF_DATA (asm_out_file
, 0);
5520 fputc ('\n', asm_out_file
);
5523 /* Add a new entry to .debug_aranges if appropriate. */
5526 add_arange (decl
, die
)
5530 if (! DECL_SECTION_NAME (decl
))
5533 if (arange_table_in_use
== arange_table_allocated
)
5535 arange_table_allocated
+= ARANGE_TABLE_INCREMENT
;
5537 = (arange_ref
) xrealloc (arange_table
,
5538 arange_table_allocated
* sizeof (dw_die_ref
));
5541 arange_table
[arange_table_in_use
++] = die
;
5544 /* Output the information that goes into the .debug_aranges table.
5545 Namely, define the beginning and ending address range of the
5546 text section generated for this compilation unit. */
5551 register unsigned i
;
5552 register unsigned long aranges_length
= size_of_aranges ();
5554 ASM_OUTPUT_DWARF_DATA (asm_out_file
, aranges_length
);
5556 fprintf (asm_out_file
, "\t%s Length of Address Ranges Info.",
5559 fputc ('\n', asm_out_file
);
5560 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5562 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5564 fputc ('\n', asm_out_file
);
5565 ASM_OUTPUT_DWARF_OFFSET (asm_out_file
, stripattributes (DEBUG_INFO_SECTION
));
5567 fprintf (asm_out_file
, "\t%s Offset of Compilation Unit Info.",
5570 fputc ('\n', asm_out_file
);
5571 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, PTR_SIZE
);
5573 fprintf (asm_out_file
, "\t%s Size of Address", ASM_COMMENT_START
);
5575 fputc ('\n', asm_out_file
);
5576 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5578 fprintf (asm_out_file
, "\t%s Size of Segment Descriptor",
5581 fputc ('\n', asm_out_file
);
5582 ASM_OUTPUT_DWARF_DATA4 (asm_out_file
, 4);
5584 fprintf (asm_out_file
, ",0,0");
5587 fprintf (asm_out_file
, "\t%s Pad to %d byte boundary",
5588 ASM_COMMENT_START
, 2 * PTR_SIZE
);
5590 fputc ('\n', asm_out_file
);
5591 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, stripattributes (TEXT_SECTION
));
5593 fprintf (asm_out_file
, "\t%s Address", ASM_COMMENT_START
);
5595 fputc ('\n', asm_out_file
);
5596 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
, text_end_label
,
5597 stripattributes (TEXT_SECTION
));
5599 fprintf (asm_out_file
, "%s Length", ASM_COMMENT_START
);
5601 fputc ('\n', asm_out_file
);
5602 for (i
= 0; i
< arange_table_in_use
; ++i
)
5604 dw_die_ref a
= arange_table
[i
];
5606 if (a
->die_tag
== DW_TAG_subprogram
)
5607 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, get_AT_low_pc (a
));
5610 char *name
= get_AT_string (a
, DW_AT_MIPS_linkage_name
);
5612 name
= get_AT_string (a
, DW_AT_name
);
5614 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, name
);
5618 fprintf (asm_out_file
, "\t%s Address", ASM_COMMENT_START
);
5620 fputc ('\n', asm_out_file
);
5621 if (a
->die_tag
== DW_TAG_subprogram
)
5622 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file
, get_AT_hi_pc (a
),
5625 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
,
5626 get_AT_unsigned (a
, DW_AT_byte_size
));
5629 fprintf (asm_out_file
, "%s Length", ASM_COMMENT_START
);
5631 fputc ('\n', asm_out_file
);
5634 /* Output the terminator words. */
5635 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
, 0);
5636 fputc ('\n', asm_out_file
);
5637 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file
, 0);
5638 fputc ('\n', asm_out_file
);
5641 /* Output the source line number correspondence information. This
5642 information goes into the .debug_line section.
5644 If the format of this data changes, then the function size_of_line_info
5645 must also be adjusted the same way. */
5650 char line_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
5651 char prev_line_label
[MAX_ARTIFICIAL_LABEL_BYTES
];
5652 register unsigned opc
;
5653 register unsigned n_op_args
;
5654 register unsigned long ft_index
;
5655 register unsigned long lt_index
;
5656 register unsigned long current_line
;
5657 register long line_offset
;
5658 register long line_delta
;
5659 register unsigned long current_file
;
5660 register unsigned long function
;
5662 ASM_OUTPUT_DWARF_DATA (asm_out_file
, size_of_line_info ());
5664 fprintf (asm_out_file
, "\t%s Length of Source Line Info.",
5667 fputc ('\n', asm_out_file
);
5668 ASM_OUTPUT_DWARF_DATA2 (asm_out_file
, DWARF_VERSION
);
5670 fprintf (asm_out_file
, "\t%s DWARF Version", ASM_COMMENT_START
);
5672 fputc ('\n', asm_out_file
);
5673 ASM_OUTPUT_DWARF_DATA (asm_out_file
, size_of_line_prolog ());
5675 fprintf (asm_out_file
, "\t%s Prolog Length", ASM_COMMENT_START
);
5677 fputc ('\n', asm_out_file
);
5678 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_LINE_MIN_INSTR_LENGTH
);
5680 fprintf (asm_out_file
, "\t%s Minimum Instruction Length",
5683 fputc ('\n', asm_out_file
);
5684 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DWARF_LINE_DEFAULT_IS_STMT_START
);
5686 fprintf (asm_out_file
, "\t%s Default is_stmt_start flag",
5689 fputc ('\n', asm_out_file
);
5690 fprintf (asm_out_file
, "\t%s\t%d", ASM_BYTE_OP
, DWARF_LINE_BASE
);
5692 fprintf (asm_out_file
, "\t%s Line Base Value (Special Opcodes)",
5695 fputc ('\n', asm_out_file
);
5696 fprintf (asm_out_file
, "\t%s\t%u", ASM_BYTE_OP
, DWARF_LINE_RANGE
);
5698 fprintf (asm_out_file
, "\t%s Line Range Value (Special Opcodes)",
5701 fputc ('\n', asm_out_file
);
5702 fprintf (asm_out_file
, "\t%s\t%u", ASM_BYTE_OP
, DWARF_LINE_OPCODE_BASE
);
5704 fprintf (asm_out_file
, "\t%s Special Opcode Base", ASM_COMMENT_START
);
5706 fputc ('\n', asm_out_file
);
5707 for (opc
= 1; opc
< DWARF_LINE_OPCODE_BASE
; ++opc
)
5711 case DW_LNS_advance_pc
:
5712 case DW_LNS_advance_line
:
5713 case DW_LNS_set_file
:
5714 case DW_LNS_set_column
:
5715 case DW_LNS_fixed_advance_pc
:
5722 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, n_op_args
);
5724 fprintf (asm_out_file
, "\t%s opcode: 0x%x has %d args",
5725 ASM_COMMENT_START
, opc
, n_op_args
);
5726 fputc ('\n', asm_out_file
);
5730 fprintf (asm_out_file
, "%s Include Directory Table\n", ASM_COMMENT_START
);
5732 /* Include directory table is empty, at present */
5733 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5734 fputc ('\n', asm_out_file
);
5736 fprintf (asm_out_file
, "%s File Name Table\n", ASM_COMMENT_START
);
5738 for (ft_index
= 1; ft_index
< file_table_in_use
; ++ft_index
)
5742 ASM_OUTPUT_DWARF_STRING (asm_out_file
, file_table
[ft_index
]);
5743 fprintf (asm_out_file
, "%s File Entry: 0x%lx",
5744 ASM_COMMENT_START
, ft_index
);
5748 ASM_OUTPUT_ASCII (asm_out_file
,
5749 file_table
[ft_index
],
5750 strlen (file_table
[ft_index
]) + 1);
5753 fputc ('\n', asm_out_file
);
5755 /* Include directory index */
5757 fputc ('\n', asm_out_file
);
5759 /* Modification time */
5761 fputc ('\n', asm_out_file
);
5763 /* File length in bytes */
5765 fputc ('\n', asm_out_file
);
5768 /* Terminate the file name table */
5769 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5770 fputc ('\n', asm_out_file
);
5772 /* Set the address register to the first location in the text section */
5773 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5775 fprintf (asm_out_file
, "\t%s DW_LNE_set_address", ASM_COMMENT_START
);
5777 fputc ('\n', asm_out_file
);
5778 output_uleb128 (1 + PTR_SIZE
);
5779 fputc ('\n', asm_out_file
);
5780 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5781 fputc ('\n', asm_out_file
);
5782 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, stripattributes (TEXT_SECTION
));
5783 fputc ('\n', asm_out_file
);
5785 /* Generate the line number to PC correspondence table, encoded as
5786 a series of state machine operations. */
5789 strcpy (prev_line_label
, stripattributes (TEXT_SECTION
));
5790 for (lt_index
= 1; lt_index
< line_info_table_in_use
; ++lt_index
)
5792 register dw_line_info_ref line_info
;
5794 /* Emit debug info for the address of the current line, choosing
5795 the encoding that uses the least amount of space. */
5796 /* ??? Unfortunately, we have little choice here currently, and must
5797 always use the most general form. Gcc does not know the address
5798 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5799 dwarf2 aware assemblers at this time, so we can't use any special
5800 pseudo ops that would allow the assembler to optimally encode this for
5801 us. Many ports do have length attributes which will give an upper
5802 bound on the address range. We could perhaps use length attributes
5803 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5804 ASM_GENERATE_INTERNAL_LABEL (line_label
, LINE_CODE_LABEL
, lt_index
);
5807 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5808 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5810 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5813 fputc ('\n', asm_out_file
);
5814 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
, prev_line_label
);
5815 fputc ('\n', asm_out_file
);
5819 /* This can handle any delta. This takes 4+PTR_SIZE bytes. */
5820 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5822 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5824 fputc ('\n', asm_out_file
);
5825 output_uleb128 (1 + PTR_SIZE
);
5826 fputc ('\n', asm_out_file
);
5827 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5828 fputc ('\n', asm_out_file
);
5829 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5830 fputc ('\n', asm_out_file
);
5832 strcpy (prev_line_label
, line_label
);
5834 /* Emit debug info for the source file of the current line, if
5835 different from the previous line. */
5836 line_info
= &line_info_table
[lt_index
];
5837 if (line_info
->dw_file_num
!= current_file
)
5839 current_file
= line_info
->dw_file_num
;
5840 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_set_file
);
5842 fprintf (asm_out_file
, "\t%s DW_LNS_set_file", ASM_COMMENT_START
);
5844 fputc ('\n', asm_out_file
);
5845 output_uleb128 (current_file
);
5847 fprintf (asm_out_file
, " (\"%s\")", file_table
[current_file
]);
5849 fputc ('\n', asm_out_file
);
5852 /* Emit debug info for the current line number, choosing the encoding
5853 that uses the least amount of space. */
5854 line_offset
= line_info
->dw_line_num
- current_line
;
5855 line_delta
= line_offset
- DWARF_LINE_BASE
;
5856 current_line
= line_info
->dw_line_num
;
5857 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
5859 /* This can handle deltas from -10 to 234, using the current
5860 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
5862 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
5863 DWARF_LINE_OPCODE_BASE
+ line_delta
);
5865 fprintf (asm_out_file
,
5866 "\t%s line %ld", ASM_COMMENT_START
, current_line
);
5868 fputc ('\n', asm_out_file
);
5872 /* This can handle any delta. This takes at least 4 bytes, depending
5873 on the value being encoded. */
5874 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_advance_line
);
5876 fprintf (asm_out_file
, "\t%s advance to line %ld",
5877 ASM_COMMENT_START
, current_line
);
5879 fputc ('\n', asm_out_file
);
5880 output_sleb128 (line_offset
);
5881 fputc ('\n', asm_out_file
);
5882 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_copy
);
5883 fputc ('\n', asm_out_file
);
5887 /* Emit debug info for the address of the end of the function. */
5890 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5892 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5895 fputc ('\n', asm_out_file
);
5896 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, text_end_label
, prev_line_label
);
5897 fputc ('\n', asm_out_file
);
5901 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5903 fprintf (asm_out_file
, "\t%s DW_LNE_set_address", ASM_COMMENT_START
);
5904 fputc ('\n', asm_out_file
);
5905 output_uleb128 (1 + PTR_SIZE
);
5906 fputc ('\n', asm_out_file
);
5907 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5908 fputc ('\n', asm_out_file
);
5909 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, text_end_label
);
5910 fputc ('\n', asm_out_file
);
5913 /* Output the marker for the end of the line number info. */
5914 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5916 fprintf (asm_out_file
, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START
);
5918 fputc ('\n', asm_out_file
);
5920 fputc ('\n', asm_out_file
);
5921 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_end_sequence
);
5922 fputc ('\n', asm_out_file
);
5927 for (lt_index
= 0; lt_index
< separate_line_info_table_in_use
; )
5929 register dw_separate_line_info_ref line_info
5930 = &separate_line_info_table
[lt_index
];
5932 /* Emit debug info for the address of the current line. If this is
5933 a new function, or the first line of a function, then we need
5934 to handle it differently. */
5935 ASM_GENERATE_INTERNAL_LABEL (line_label
, SEPARATE_LINE_CODE_LABEL
,
5937 if (function
!= line_info
->function
)
5939 function
= line_info
->function
;
5941 /* Set the address register to the first line in the function */
5942 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5944 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5947 fputc ('\n', asm_out_file
);
5948 output_uleb128 (1 + PTR_SIZE
);
5949 fputc ('\n', asm_out_file
);
5950 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5951 fputc ('\n', asm_out_file
);
5952 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5953 fputc ('\n', asm_out_file
);
5957 /* ??? See the DW_LNS_advance_pc comment above. */
5960 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
5962 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
5965 fputc ('\n', asm_out_file
);
5966 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
,
5968 fputc ('\n', asm_out_file
);
5972 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
5974 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
5976 fputc ('\n', asm_out_file
);
5977 output_uleb128 (1 + PTR_SIZE
);
5978 fputc ('\n', asm_out_file
);
5979 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
5980 fputc ('\n', asm_out_file
);
5981 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
5982 fputc ('\n', asm_out_file
);
5985 strcpy (prev_line_label
, line_label
);
5987 /* Emit debug info for the source file of the current line, if
5988 different from the previous line. */
5989 if (line_info
->dw_file_num
!= current_file
)
5991 current_file
= line_info
->dw_file_num
;
5992 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_set_file
);
5994 fprintf (asm_out_file
, "\t%s DW_LNS_set_file", ASM_COMMENT_START
);
5996 fputc ('\n', asm_out_file
);
5997 output_uleb128 (current_file
);
5999 fprintf (asm_out_file
, " (\"%s\")", file_table
[current_file
]);
6001 fputc ('\n', asm_out_file
);
6004 /* Emit debug info for the current line number, choosing the encoding
6005 that uses the least amount of space. */
6006 if (line_info
->dw_line_num
!= current_line
)
6008 line_offset
= line_info
->dw_line_num
- current_line
;
6009 line_delta
= line_offset
- DWARF_LINE_BASE
;
6010 current_line
= line_info
->dw_line_num
;
6011 if (line_delta
>= 0 && line_delta
< (DWARF_LINE_RANGE
- 1))
6013 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
,
6014 DWARF_LINE_OPCODE_BASE
+ line_delta
);
6016 fprintf (asm_out_file
,
6017 "\t%s line %ld", ASM_COMMENT_START
, current_line
);
6019 fputc ('\n', asm_out_file
);
6023 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_advance_line
);
6025 fprintf (asm_out_file
, "\t%s advance to line %ld",
6026 ASM_COMMENT_START
, current_line
);
6028 fputc ('\n', asm_out_file
);
6029 output_sleb128 (line_offset
);
6030 fputc ('\n', asm_out_file
);
6031 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_copy
);
6032 fputc ('\n', asm_out_file
);
6038 /* If we're done with a function, end its sequence. */
6039 if (lt_index
== separate_line_info_table_in_use
6040 || separate_line_info_table
[lt_index
].function
!= function
)
6045 /* Emit debug info for the address of the end of the function. */
6046 ASM_GENERATE_INTERNAL_LABEL (line_label
, FUNC_END_LABEL
, function
);
6049 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNS_fixed_advance_pc
);
6051 fprintf (asm_out_file
, "\t%s DW_LNS_fixed_advance_pc",
6054 fputc ('\n', asm_out_file
);
6055 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file
, line_label
,
6057 fputc ('\n', asm_out_file
);
6061 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
6063 fprintf (asm_out_file
, "\t%s DW_LNE_set_address",
6065 fputc ('\n', asm_out_file
);
6066 output_uleb128 (1 + PTR_SIZE
);
6067 fputc ('\n', asm_out_file
);
6068 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_set_address
);
6069 fputc ('\n', asm_out_file
);
6070 ASM_OUTPUT_DWARF_ADDR (asm_out_file
, line_label
);
6071 fputc ('\n', asm_out_file
);
6074 /* Output the marker for the end of this sequence. */
6075 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, 0);
6077 fprintf (asm_out_file
, "\t%s DW_LNE_end_sequence",
6080 fputc ('\n', asm_out_file
);
6082 fputc ('\n', asm_out_file
);
6083 ASM_OUTPUT_DWARF_DATA1 (asm_out_file
, DW_LNE_end_sequence
);
6084 fputc ('\n', asm_out_file
);
6089 /* Given a pointer to a BLOCK node return non-zero if (and only if) the node
6090 in question represents the outermost pair of curly braces (i.e. the "body
6091 block") of a function or method.
6093 For any BLOCK node representing a "body block" of a function or method, the
6094 BLOCK_SUPERCONTEXT of the node will point to another BLOCK node which
6095 represents the outermost (function) scope for the function or method (i.e.
6096 the one which includes the formal parameters). The BLOCK_SUPERCONTEXT of
6097 *that* node in turn will point to the relevant FUNCTION_DECL node. */
6100 is_body_block (stmt
)
6103 if (TREE_CODE (stmt
) == BLOCK
)
6105 register tree parent
= BLOCK_SUPERCONTEXT (stmt
);
6107 if (TREE_CODE (parent
) == BLOCK
)
6109 register tree grandparent
= BLOCK_SUPERCONTEXT (parent
);
6111 if (TREE_CODE (grandparent
) == FUNCTION_DECL
)
6119 /* Given a pointer to a tree node for some base type, return a pointer to
6120 a DIE that describes the given type.
6122 This routine must only be called for GCC type nodes that correspond to
6123 Dwarf base (fundamental) types. */
6126 base_type_die (type
)
6129 register dw_die_ref base_type_result
;
6130 register char *type_name
;
6131 register enum dwarf_type encoding
;
6132 register tree name
= TYPE_NAME (type
);
6134 if (TREE_CODE (type
) == ERROR_MARK
6135 || TREE_CODE (type
) == VOID_TYPE
)
6138 if (TREE_CODE (name
) == TYPE_DECL
)
6139 name
= DECL_NAME (name
);
6140 type_name
= IDENTIFIER_POINTER (name
);
6142 switch (TREE_CODE (type
))
6145 /* Carefully distinguish the C character types, without messing
6146 up if the language is not C. Note that we check only for the names
6147 that contain spaces; other names might occur by coincidence in other
6149 if (! (TYPE_PRECISION (type
) == CHAR_TYPE_SIZE
6150 && (type
== char_type_node
6151 || ! strcmp (type_name
, "signed char")
6152 || ! strcmp (type_name
, "unsigned char"))))
6154 if (TREE_UNSIGNED (type
))
6155 encoding
= DW_ATE_unsigned
;
6157 encoding
= DW_ATE_signed
;
6160 /* else fall through */
6163 /* GNU Pascal/Ada CHAR type. Not used in C. */
6164 if (TREE_UNSIGNED (type
))
6165 encoding
= DW_ATE_unsigned_char
;
6167 encoding
= DW_ATE_signed_char
;
6171 encoding
= DW_ATE_float
;
6175 encoding
= DW_ATE_complex_float
;
6179 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6180 encoding
= DW_ATE_boolean
;
6184 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6187 base_type_result
= new_die (DW_TAG_base_type
, comp_unit_die
);
6188 add_AT_string (base_type_result
, DW_AT_name
, type_name
);
6189 add_AT_unsigned (base_type_result
, DW_AT_byte_size
,
6190 int_size_in_bytes (type
));
6191 add_AT_unsigned (base_type_result
, DW_AT_encoding
, encoding
);
6193 return base_type_result
;
6196 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6197 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6198 a given type is generally the same as the given type, except that if the
6199 given type is a pointer or reference type, then the root type of the given
6200 type is the root type of the "basis" type for the pointer or reference
6201 type. (This definition of the "root" type is recursive.) Also, the root
6202 type of a `const' qualified type or a `volatile' qualified type is the
6203 root type of the given type without the qualifiers. */
6209 if (TREE_CODE (type
) == ERROR_MARK
)
6210 return error_mark_node
;
6212 switch (TREE_CODE (type
))
6215 return error_mark_node
;
6218 case REFERENCE_TYPE
:
6219 return type_main_variant (root_type (TREE_TYPE (type
)));
6222 return type_main_variant (type
);
6226 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6227 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6233 switch (TREE_CODE (type
))
6248 case QUAL_UNION_TYPE
:
6253 case REFERENCE_TYPE
:
6266 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6267 entry that chains various modifiers in front of the given type. */
6270 modified_type_die (type
, is_const_type
, is_volatile_type
, context_die
)
6272 register int is_const_type
;
6273 register int is_volatile_type
;
6274 register dw_die_ref context_die
;
6276 register enum tree_code code
= TREE_CODE (type
);
6277 register dw_die_ref mod_type_die
= NULL
;
6278 register dw_die_ref sub_die
= NULL
;
6279 register tree item_type
= NULL
;
6281 if (code
!= ERROR_MARK
)
6283 type
= build_type_variant (type
, is_const_type
, is_volatile_type
);
6285 mod_type_die
= lookup_type_die (type
);
6287 return mod_type_die
;
6289 /* Handle C typedef types. */
6290 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
6291 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
6293 tree dtype
= TREE_TYPE (TYPE_NAME (type
));
6296 /* For a named type, use the typedef. */
6297 gen_type_die (type
, context_die
);
6298 mod_type_die
= lookup_type_die (type
);
6301 else if (is_const_type
< TYPE_READONLY (dtype
)
6302 || is_volatile_type
< TYPE_VOLATILE (dtype
))
6303 /* cv-unqualified version of named type. Just use the unnamed
6304 type to which it refers. */
6306 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type
)),
6307 is_const_type
, is_volatile_type
,
6309 /* Else cv-qualified version of named type; fall through. */
6314 else if (is_const_type
)
6316 mod_type_die
= new_die (DW_TAG_const_type
, comp_unit_die
);
6317 sub_die
= modified_type_die (type
, 0, is_volatile_type
, context_die
);
6319 else if (is_volatile_type
)
6321 mod_type_die
= new_die (DW_TAG_volatile_type
, comp_unit_die
);
6322 sub_die
= modified_type_die (type
, 0, 0, context_die
);
6324 else if (code
== POINTER_TYPE
)
6326 mod_type_die
= new_die (DW_TAG_pointer_type
, comp_unit_die
);
6327 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
6329 add_AT_unsigned (mod_type_die
, DW_AT_address_class
, 0);
6331 item_type
= TREE_TYPE (type
);
6333 else if (code
== REFERENCE_TYPE
)
6335 mod_type_die
= new_die (DW_TAG_reference_type
, comp_unit_die
);
6336 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
6338 add_AT_unsigned (mod_type_die
, DW_AT_address_class
, 0);
6340 item_type
= TREE_TYPE (type
);
6342 else if (is_base_type (type
))
6343 mod_type_die
= base_type_die (type
);
6346 gen_type_die (type
, context_die
);
6348 /* We have to get the type_main_variant here (and pass that to the
6349 `lookup_type_die' routine) because the ..._TYPE node we have
6350 might simply be a *copy* of some original type node (where the
6351 copy was created to help us keep track of typedef names) and
6352 that copy might have a different TYPE_UID from the original
6354 mod_type_die
= lookup_type_die (type_main_variant (type
));
6355 if (mod_type_die
== NULL
)
6360 equate_type_number_to_die (type
, mod_type_die
);
6362 /* We must do this after the equate_type_number_to_die call, in case
6363 this is a recursive type. This ensures that the modified_type_die
6364 recursion will terminate even if the type is recursive. Recursive
6365 types are possible in Ada. */
6366 sub_die
= modified_type_die (item_type
,
6367 TYPE_READONLY (item_type
),
6368 TYPE_VOLATILE (item_type
),
6371 if (sub_die
!= NULL
)
6372 add_AT_die_ref (mod_type_die
, DW_AT_type
, sub_die
);
6374 return mod_type_die
;
6377 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6378 an enumerated type. */
6384 return TREE_CODE (type
) == ENUMERAL_TYPE
;
6387 /* Return a location descriptor that designates a machine register. */
6389 static dw_loc_descr_ref
6390 reg_loc_descriptor (rtl
)
6393 register dw_loc_descr_ref loc_result
= NULL
;
6394 register unsigned reg
= reg_number (rtl
);
6397 loc_result
= new_loc_descr (DW_OP_reg0
+ reg
, 0, 0);
6399 loc_result
= new_loc_descr (DW_OP_regx
, reg
, 0);
6404 /* Return a location descriptor that designates a base+offset location. */
6406 static dw_loc_descr_ref
6407 based_loc_descr (reg
, offset
)
6411 register dw_loc_descr_ref loc_result
;
6412 /* For the "frame base", we use the frame pointer or stack pointer
6413 registers, since the RTL for local variables is relative to one of
6415 register unsigned fp_reg
= DBX_REGISTER_NUMBER (frame_pointer_needed
6416 ? HARD_FRAME_POINTER_REGNUM
6417 : STACK_POINTER_REGNUM
);
6420 loc_result
= new_loc_descr (DW_OP_fbreg
, offset
, 0);
6422 loc_result
= new_loc_descr (DW_OP_breg0
+ reg
, offset
, 0);
6424 loc_result
= new_loc_descr (DW_OP_bregx
, reg
, offset
);
6429 /* Return true if this RTL expression describes a base+offset calculation. */
6435 return (GET_CODE (rtl
) == PLUS
6436 && ((GET_CODE (XEXP (rtl
, 0)) == REG
6437 && GET_CODE (XEXP (rtl
, 1)) == CONST_INT
)));
6440 /* The following routine converts the RTL for a variable or parameter
6441 (resident in memory) into an equivalent Dwarf representation of a
6442 mechanism for getting the address of that same variable onto the top of a
6443 hypothetical "address evaluation" stack.
6445 When creating memory location descriptors, we are effectively transforming
6446 the RTL for a memory-resident object into its Dwarf postfix expression
6447 equivalent. This routine recursively descends an RTL tree, turning
6448 it into Dwarf postfix code as it goes. */
6450 static dw_loc_descr_ref
6451 mem_loc_descriptor (rtl
)
6454 dw_loc_descr_ref mem_loc_result
= NULL
;
6455 /* Note that for a dynamically sized array, the location we will generate a
6456 description of here will be the lowest numbered location which is
6457 actually within the array. That's *not* necessarily the same as the
6458 zeroth element of the array. */
6460 switch (GET_CODE (rtl
))
6463 /* The case of a subreg may arise when we have a local (register)
6464 variable or a formal (register) parameter which doesn't quite fill
6465 up an entire register. For now, just assume that it is
6466 legitimate to make the Dwarf info refer to the whole register which
6467 contains the given subreg. */
6468 rtl
= XEXP (rtl
, 0);
6470 /* ... fall through ... */
6473 /* Whenever a register number forms a part of the description of the
6474 method for calculating the (dynamic) address of a memory resident
6475 object, DWARF rules require the register number be referred to as
6476 a "base register". This distinction is not based in any way upon
6477 what category of register the hardware believes the given register
6478 belongs to. This is strictly DWARF terminology we're dealing with
6479 here. Note that in cases where the location of a memory-resident
6480 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6481 OP_CONST (0)) the actual DWARF location descriptor that we generate
6482 may just be OP_BASEREG (basereg). This may look deceptively like
6483 the object in question was allocated to a register (rather than in
6484 memory) so DWARF consumers need to be aware of the subtle
6485 distinction between OP_REG and OP_BASEREG. */
6486 mem_loc_result
= based_loc_descr (reg_number (rtl
), 0);
6490 mem_loc_result
= mem_loc_descriptor (XEXP (rtl
, 0));
6491 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_deref
, 0, 0));
6496 mem_loc_result
= new_loc_descr (DW_OP_addr
, 0, 0);
6497 mem_loc_result
->dw_loc_oprnd1
.val_class
= dw_val_class_addr
;
6498 mem_loc_result
->dw_loc_oprnd1
.v
.val_addr
= addr_to_string (rtl
);
6502 if (is_based_loc (rtl
))
6503 mem_loc_result
= based_loc_descr (reg_number (XEXP (rtl
, 0)),
6504 INTVAL (XEXP (rtl
, 1)));
6507 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 0)));
6508 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 1)));
6509 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_plus
, 0, 0));
6514 /* If a pseudo-reg is optimized away, it is possible for it to
6515 be replaced with a MEM containing a multiply. */
6516 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 0)));
6517 add_loc_descr (&mem_loc_result
, mem_loc_descriptor (XEXP (rtl
, 1)));
6518 add_loc_descr (&mem_loc_result
, new_loc_descr (DW_OP_mul
, 0, 0));
6522 mem_loc_result
= new_loc_descr (DW_OP_constu
, INTVAL (rtl
), 0);
6529 return mem_loc_result
;
6532 /* Return a descriptor that describes the concatenation of two locations.
6533 This is typically a complex variable. */
6535 static dw_loc_descr_ref
6536 concat_loc_descriptor (x0
, x1
)
6537 register rtx x0
, x1
;
6539 dw_loc_descr_ref cc_loc_result
= NULL
;
6541 if (!is_pseudo_reg (x0
)
6542 && (GET_CODE (x0
) != MEM
|| !is_pseudo_reg (XEXP (x0
, 0))))
6543 add_loc_descr (&cc_loc_result
, loc_descriptor (x0
));
6544 add_loc_descr (&cc_loc_result
,
6545 new_loc_descr (DW_OP_piece
, GET_MODE_SIZE (GET_MODE (x0
)), 0));
6547 if (!is_pseudo_reg (x1
)
6548 && (GET_CODE (x1
) != MEM
|| !is_pseudo_reg (XEXP (x1
, 0))))
6549 add_loc_descr (&cc_loc_result
, loc_descriptor (x1
));
6550 add_loc_descr (&cc_loc_result
,
6551 new_loc_descr (DW_OP_piece
, GET_MODE_SIZE (GET_MODE (x1
)), 0));
6553 return cc_loc_result
;
6556 /* Output a proper Dwarf location descriptor for a variable or parameter
6557 which is either allocated in a register or in a memory location. For a
6558 register, we just generate an OP_REG and the register number. For a
6559 memory location we provide a Dwarf postfix expression describing how to
6560 generate the (dynamic) address of the object onto the address stack. */
6562 static dw_loc_descr_ref
6563 loc_descriptor (rtl
)
6566 dw_loc_descr_ref loc_result
= NULL
;
6567 switch (GET_CODE (rtl
))
6570 /* The case of a subreg may arise when we have a local (register)
6571 variable or a formal (register) parameter which doesn't quite fill
6572 up an entire register. For now, just assume that it is
6573 legitimate to make the Dwarf info refer to the whole register which
6574 contains the given subreg. */
6575 rtl
= XEXP (rtl
, 0);
6577 /* ... fall through ... */
6580 loc_result
= reg_loc_descriptor (rtl
);
6584 loc_result
= mem_loc_descriptor (XEXP (rtl
, 0));
6588 loc_result
= concat_loc_descriptor (XEXP (rtl
, 0), XEXP (rtl
, 1));
6598 /* Given an unsigned value, round it up to the lowest multiple of `boundary'
6599 which is not less than the value itself. */
6601 static inline unsigned
6602 ceiling (value
, boundary
)
6603 register unsigned value
;
6604 register unsigned boundary
;
6606 return (((value
+ boundary
- 1) / boundary
) * boundary
);
6609 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6610 pointer to the declared type for the relevant field variable, or return
6611 `integer_type_node' if the given node turns out to be an
6620 if (TREE_CODE (decl
) == ERROR_MARK
)
6621 return integer_type_node
;
6623 type
= DECL_BIT_FIELD_TYPE (decl
);
6624 if (type
== NULL_TREE
)
6625 type
= TREE_TYPE (decl
);
6630 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6631 node, return the alignment in bits for the type, or else return
6632 BITS_PER_WORD if the node actually turns out to be an
6635 static inline unsigned
6636 simple_type_align_in_bits (type
)
6639 return (TREE_CODE (type
) != ERROR_MARK
) ? TYPE_ALIGN (type
) : BITS_PER_WORD
;
6642 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6643 node, return the size in bits for the type if it is a constant, or else
6644 return the alignment for the type if the type's size is not constant, or
6645 else return BITS_PER_WORD if the type actually turns out to be an
6648 static inline unsigned
6649 simple_type_size_in_bits (type
)
6652 if (TREE_CODE (type
) == ERROR_MARK
)
6653 return BITS_PER_WORD
;
6656 register tree type_size_tree
= TYPE_SIZE (type
);
6658 if (TREE_CODE (type_size_tree
) != INTEGER_CST
)
6659 return TYPE_ALIGN (type
);
6661 return (unsigned) TREE_INT_CST_LOW (type_size_tree
);
6665 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6666 return the byte offset of the lowest addressed byte of the "containing
6667 object" for the given FIELD_DECL, or return 0 if we are unable to
6668 determine what that offset is, either because the argument turns out to
6669 be a pointer to an ERROR_MARK node, or because the offset is actually
6670 variable. (We can't handle the latter case just yet). */
6673 field_byte_offset (decl
)
6676 register unsigned type_align_in_bytes
;
6677 register unsigned type_align_in_bits
;
6678 register unsigned type_size_in_bits
;
6679 register unsigned object_offset_in_align_units
;
6680 register unsigned object_offset_in_bits
;
6681 register unsigned object_offset_in_bytes
;
6683 register tree bitpos_tree
;
6684 register tree field_size_tree
;
6685 register unsigned bitpos_int
;
6686 register unsigned deepest_bitpos
;
6687 register unsigned field_size_in_bits
;
6689 if (TREE_CODE (decl
) == ERROR_MARK
)
6692 if (TREE_CODE (decl
) != FIELD_DECL
)
6695 type
= field_type (decl
);
6697 bitpos_tree
= DECL_FIELD_BITPOS (decl
);
6698 field_size_tree
= DECL_SIZE (decl
);
6700 /* We cannot yet cope with fields whose positions or sizes are variable, so
6701 for now, when we see such things, we simply return 0. Someday, we may
6702 be able to handle such cases, but it will be damn difficult. */
6703 if (TREE_CODE (bitpos_tree
) != INTEGER_CST
)
6705 bitpos_int
= (unsigned) TREE_INT_CST_LOW (bitpos_tree
);
6707 if (TREE_CODE (field_size_tree
) != INTEGER_CST
)
6710 field_size_in_bits
= (unsigned) TREE_INT_CST_LOW (field_size_tree
);
6711 type_size_in_bits
= simple_type_size_in_bits (type
);
6712 type_align_in_bits
= simple_type_align_in_bits (type
);
6713 type_align_in_bytes
= type_align_in_bits
/ BITS_PER_UNIT
;
6715 /* Note that the GCC front-end doesn't make any attempt to keep track of
6716 the starting bit offset (relative to the start of the containing
6717 structure type) of the hypothetical "containing object" for a bit-
6718 field. Thus, when computing the byte offset value for the start of the
6719 "containing object" of a bit-field, we must deduce this information on
6720 our own. This can be rather tricky to do in some cases. For example,
6721 handling the following structure type definition when compiling for an
6722 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6725 struct S { int field1; long long field2:31; };
6727 Fortunately, there is a simple rule-of-thumb which can be
6728 used in such cases. When compiling for an i386/i486, GCC will allocate
6729 8 bytes for the structure shown above. It decides to do this based upon
6730 one simple rule for bit-field allocation. Quite simply, GCC allocates
6731 each "containing object" for each bit-field at the first (i.e. lowest
6732 addressed) legitimate alignment boundary (based upon the required
6733 minimum alignment for the declared type of the field) which it can
6734 possibly use, subject to the condition that there is still enough
6735 available space remaining in the containing object (when allocated at
6736 the selected point) to fully accommodate all of the bits of the
6737 bit-field itself. This simple rule makes it obvious why GCC allocates
6738 8 bytes for each object of the structure type shown above. When looking
6739 for a place to allocate the "containing object" for `field2', the
6740 compiler simply tries to allocate a 64-bit "containing object" at each
6741 successive 32-bit boundary (starting at zero) until it finds a place to
6742 allocate that 64- bit field such that at least 31 contiguous (and
6743 previously unallocated) bits remain within that selected 64 bit field.
6744 (As it turns out, for the example above, the compiler finds that it is
6745 OK to allocate the "containing object" 64-bit field at bit-offset zero
6746 within the structure type.) Here we attempt to work backwards from the
6747 limited set of facts we're given, and we try to deduce from those facts,
6748 where GCC must have believed that the containing object started (within
6749 the structure type). The value we deduce is then used (by the callers of
6750 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6751 for fields (both bit-fields and, in the case of DW_AT_location, regular
6754 /* Figure out the bit-distance from the start of the structure to the
6755 "deepest" bit of the bit-field. */
6756 deepest_bitpos
= bitpos_int
+ field_size_in_bits
;
6758 /* This is the tricky part. Use some fancy footwork to deduce where the
6759 lowest addressed bit of the containing object must be. */
6760 object_offset_in_bits
6761 = ceiling (deepest_bitpos
, type_align_in_bits
) - type_size_in_bits
;
6763 /* Compute the offset of the containing object in "alignment units". */
6764 object_offset_in_align_units
= object_offset_in_bits
/ type_align_in_bits
;
6766 /* Compute the offset of the containing object in bytes. */
6767 object_offset_in_bytes
= object_offset_in_align_units
* type_align_in_bytes
;
6769 return object_offset_in_bytes
;
6772 /* The following routines define various Dwarf attributes and any data
6773 associated with them. */
6775 /* Add a location description attribute value to a DIE.
6777 This emits location attributes suitable for whole variables and
6778 whole parameters. Note that the location attributes for struct fields are
6779 generated by the routine `data_member_location_attribute' below. */
6782 add_AT_location_description (die
, attr_kind
, rtl
)
6784 enum dwarf_attribute attr_kind
;
6787 /* Handle a special case. If we are about to output a location descriptor
6788 for a variable or parameter which has been optimized out of existence,
6789 don't do that. A variable which has been optimized out
6790 of existence will have a DECL_RTL value which denotes a pseudo-reg.
6791 Currently, in some rare cases, variables can have DECL_RTL values which
6792 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
6793 elsewhere in the compiler. We treat such cases as if the variable(s) in
6794 question had been optimized out of existence. */
6796 if (is_pseudo_reg (rtl
)
6797 || (GET_CODE (rtl
) == MEM
6798 && is_pseudo_reg (XEXP (rtl
, 0)))
6799 || (GET_CODE (rtl
) == CONCAT
6800 && is_pseudo_reg (XEXP (rtl
, 0))
6801 && is_pseudo_reg (XEXP (rtl
, 1))))
6804 add_AT_loc (die
, attr_kind
, loc_descriptor (rtl
));
6807 /* Attach the specialized form of location attribute used for data
6808 members of struct and union types. In the special case of a
6809 FIELD_DECL node which represents a bit-field, the "offset" part
6810 of this special location descriptor must indicate the distance
6811 in bytes from the lowest-addressed byte of the containing struct
6812 or union type to the lowest-addressed byte of the "containing
6813 object" for the bit-field. (See the `field_byte_offset' function
6814 above).. For any given bit-field, the "containing object" is a
6815 hypothetical object (of some integral or enum type) within which
6816 the given bit-field lives. The type of this hypothetical
6817 "containing object" is always the same as the declared type of
6818 the individual bit-field itself (for GCC anyway... the DWARF
6819 spec doesn't actually mandate this). Note that it is the size
6820 (in bytes) of the hypothetical "containing object" which will
6821 be given in the DW_AT_byte_size attribute for this bit-field.
6822 (See the `byte_size_attribute' function below.) It is also used
6823 when calculating the value of the DW_AT_bit_offset attribute.
6824 (See the `bit_offset_attribute' function below). */
6827 add_data_member_location_attribute (die
, decl
)
6828 register dw_die_ref die
;
6831 register unsigned long offset
;
6832 register dw_loc_descr_ref loc_descr
;
6833 register enum dwarf_location_atom op
;
6835 if (TREE_CODE (decl
) == TREE_VEC
)
6836 offset
= TREE_INT_CST_LOW (BINFO_OFFSET (decl
));
6838 offset
= field_byte_offset (decl
);
6840 /* The DWARF2 standard says that we should assume that the structure address
6841 is already on the stack, so we can specify a structure field address
6842 by using DW_OP_plus_uconst. */
6844 #ifdef MIPS_DEBUGGING_INFO
6845 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
6846 correctly. It works only if we leave the offset on the stack. */
6849 op
= DW_OP_plus_uconst
;
6852 loc_descr
= new_loc_descr (op
, offset
, 0);
6853 add_AT_loc (die
, DW_AT_data_member_location
, loc_descr
);
6856 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
6857 does not have a "location" either in memory or in a register. These
6858 things can arise in GNU C when a constant is passed as an actual parameter
6859 to an inlined function. They can also arise in C++ where declared
6860 constants do not necessarily get memory "homes". */
6863 add_const_value_attribute (die
, rtl
)
6864 register dw_die_ref die
;
6867 switch (GET_CODE (rtl
))
6870 /* Note that a CONST_INT rtx could represent either an integer or a
6871 floating-point constant. A CONST_INT is used whenever the constant
6872 will fit into a single word. In all such cases, the original mode
6873 of the constant value is wiped out, and the CONST_INT rtx is
6874 assigned VOIDmode. */
6875 add_AT_unsigned (die
, DW_AT_const_value
, (unsigned) INTVAL (rtl
));
6879 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
6880 floating-point constant. A CONST_DOUBLE is used whenever the
6881 constant requires more than one word in order to be adequately
6882 represented. We output CONST_DOUBLEs as blocks. */
6884 register enum machine_mode mode
= GET_MODE (rtl
);
6886 if (GET_MODE_CLASS (mode
) == MODE_FLOAT
)
6888 register unsigned length
= GET_MODE_SIZE (mode
) / sizeof (long);
6892 REAL_VALUE_FROM_CONST_DOUBLE (rv
, rtl
);
6896 REAL_VALUE_TO_TARGET_SINGLE (rv
, array
[0]);
6900 REAL_VALUE_TO_TARGET_DOUBLE (rv
, array
);
6905 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv
, array
);
6912 add_AT_float (die
, DW_AT_const_value
, length
, array
);
6915 add_AT_long_long (die
, DW_AT_const_value
,
6916 CONST_DOUBLE_HIGH (rtl
), CONST_DOUBLE_LOW (rtl
));
6921 add_AT_string (die
, DW_AT_const_value
, XSTR (rtl
, 0));
6927 add_AT_addr (die
, DW_AT_const_value
, addr_to_string (rtl
));
6931 /* In cases where an inlined instance of an inline function is passed
6932 the address of an `auto' variable (which is local to the caller) we
6933 can get a situation where the DECL_RTL of the artificial local
6934 variable (for the inlining) which acts as a stand-in for the
6935 corresponding formal parameter (of the inline function) will look
6936 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
6937 exactly a compile-time constant expression, but it isn't the address
6938 of the (artificial) local variable either. Rather, it represents the
6939 *value* which the artificial local variable always has during its
6940 lifetime. We currently have no way to represent such quasi-constant
6941 values in Dwarf, so for now we just punt and generate nothing. */
6945 /* No other kinds of rtx should be possible here. */
6951 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
6952 data attribute for a variable or a parameter. We generate the
6953 DW_AT_const_value attribute only in those cases where the given variable
6954 or parameter does not have a true "location" either in memory or in a
6955 register. This can happen (for example) when a constant is passed as an
6956 actual argument in a call to an inline function. (It's possible that
6957 these things can crop up in other ways also.) Note that one type of
6958 constant value which can be passed into an inlined function is a constant
6959 pointer. This can happen for example if an actual argument in an inlined
6960 function call evaluates to a compile-time constant address. */
6963 add_location_or_const_value_attribute (die
, decl
)
6964 register dw_die_ref die
;
6968 register tree declared_type
;
6969 register tree passed_type
;
6971 if (TREE_CODE (decl
) == ERROR_MARK
)
6974 if (TREE_CODE (decl
) != VAR_DECL
&& TREE_CODE (decl
) != PARM_DECL
)
6977 /* Here we have to decide where we are going to say the parameter "lives"
6978 (as far as the debugger is concerned). We only have a couple of
6979 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
6981 DECL_RTL normally indicates where the parameter lives during most of the
6982 activation of the function. If optimization is enabled however, this
6983 could be either NULL or else a pseudo-reg. Both of those cases indicate
6984 that the parameter doesn't really live anywhere (as far as the code
6985 generation parts of GCC are concerned) during most of the function's
6986 activation. That will happen (for example) if the parameter is never
6987 referenced within the function.
6989 We could just generate a location descriptor here for all non-NULL
6990 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
6991 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
6992 where DECL_RTL is NULL or is a pseudo-reg.
6994 Note however that we can only get away with using DECL_INCOMING_RTL as
6995 a backup substitute for DECL_RTL in certain limited cases. In cases
6996 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
6997 we can be sure that the parameter was passed using the same type as it is
6998 declared to have within the function, and that its DECL_INCOMING_RTL
6999 points us to a place where a value of that type is passed.
7001 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7002 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7003 because in these cases DECL_INCOMING_RTL points us to a value of some
7004 type which is *different* from the type of the parameter itself. Thus,
7005 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7006 such cases, the debugger would end up (for example) trying to fetch a
7007 `float' from a place which actually contains the first part of a
7008 `double'. That would lead to really incorrect and confusing
7009 output at debug-time.
7011 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7012 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7013 are a couple of exceptions however. On little-endian machines we can
7014 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7015 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7016 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7017 when (on a little-endian machine) a non-prototyped function has a
7018 parameter declared to be of type `short' or `char'. In such cases,
7019 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7020 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7021 passed `int' value. If the debugger then uses that address to fetch
7022 a `short' or a `char' (on a little-endian machine) the result will be
7023 the correct data, so we allow for such exceptional cases below.
7025 Note that our goal here is to describe the place where the given formal
7026 parameter lives during most of the function's activation (i.e. between
7027 the end of the prologue and the start of the epilogue). We'll do that
7028 as best as we can. Note however that if the given formal parameter is
7029 modified sometime during the execution of the function, then a stack
7030 backtrace (at debug-time) will show the function as having been
7031 called with the *new* value rather than the value which was
7032 originally passed in. This happens rarely enough that it is not
7033 a major problem, but it *is* a problem, and I'd like to fix it.
7035 A future version of dwarf2out.c may generate two additional
7036 attributes for any given DW_TAG_formal_parameter DIE which will
7037 describe the "passed type" and the "passed location" for the
7038 given formal parameter in addition to the attributes we now
7039 generate to indicate the "declared type" and the "active
7040 location" for each parameter. This additional set of attributes
7041 could be used by debuggers for stack backtraces. Separately, note
7042 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7043 NULL also. This happens (for example) for inlined-instances of
7044 inline function formal parameters which are never referenced.
7045 This really shouldn't be happening. All PARM_DECL nodes should
7046 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7047 doesn't currently generate these values for inlined instances of
7048 inline function parameters, so when we see such cases, we are
7049 just out-of-luck for the time being (until integrate.c
7052 /* Use DECL_RTL as the "location" unless we find something better. */
7053 rtl
= DECL_RTL (decl
);
7055 if (TREE_CODE (decl
) == PARM_DECL
)
7057 if (rtl
== NULL_RTX
|| is_pseudo_reg (rtl
))
7059 declared_type
= type_main_variant (TREE_TYPE (decl
));
7060 passed_type
= type_main_variant (DECL_ARG_TYPE (decl
));
7062 /* This decl represents a formal parameter which was optimized out.
7063 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7064 all* cases where (rtl == NULL_RTX) just below. */
7065 if (declared_type
== passed_type
)
7066 rtl
= DECL_INCOMING_RTL (decl
);
7067 else if (! BYTES_BIG_ENDIAN
7068 && TREE_CODE (declared_type
) == INTEGER_TYPE
7069 && TYPE_SIZE (declared_type
) <= TYPE_SIZE (passed_type
))
7070 rtl
= DECL_INCOMING_RTL (decl
);
7074 if (rtl
== NULL_RTX
)
7077 rtl
= eliminate_regs (rtl
, 0, NULL_RTX
);
7078 #ifdef LEAF_REG_REMAP
7080 leaf_renumber_regs_insn (rtl
);
7083 switch (GET_CODE (rtl
))
7086 /* The address of a variable that was optimized away; don't emit
7097 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7098 add_const_value_attribute (die
, rtl
);
7105 add_AT_location_description (die
, DW_AT_location
, rtl
);
7113 /* Generate an DW_AT_name attribute given some string value to be included as
7114 the value of the attribute. */
7117 add_name_attribute (die
, name_string
)
7118 register dw_die_ref die
;
7119 register char *name_string
;
7121 if (name_string
!= NULL
&& *name_string
!= 0)
7122 add_AT_string (die
, DW_AT_name
, name_string
);
7125 /* Given a tree node describing an array bound (either lower or upper) output
7126 a representation for that bound. */
7129 add_bound_info (subrange_die
, bound_attr
, bound
)
7130 register dw_die_ref subrange_die
;
7131 register enum dwarf_attribute bound_attr
;
7132 register tree bound
;
7134 register unsigned bound_value
= 0;
7136 /* If this is an Ada unconstrained array type, then don't emit any debug
7137 info because the array bounds are unknown. They are parameterized when
7138 the type is instantiated. */
7139 if (contains_placeholder_p (bound
))
7142 switch (TREE_CODE (bound
))
7147 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7149 bound_value
= TREE_INT_CST_LOW (bound
);
7150 if (bound_attr
== DW_AT_lower_bound
7151 && ((is_c_family () && bound_value
== 0)
7152 || (is_fortran () && bound_value
== 1)))
7153 /* use the default */;
7155 add_AT_unsigned (subrange_die
, bound_attr
, bound_value
);
7160 case NON_LVALUE_EXPR
:
7161 add_bound_info (subrange_die
, bound_attr
, TREE_OPERAND (bound
, 0));
7165 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7166 access the upper bound values may be bogus. If they refer to a
7167 register, they may only describe how to get at these values at the
7168 points in the generated code right after they have just been
7169 computed. Worse yet, in the typical case, the upper bound values
7170 will not even *be* computed in the optimized code (though the
7171 number of elements will), so these SAVE_EXPRs are entirely
7172 bogus. In order to compensate for this fact, we check here to see
7173 if optimization is enabled, and if so, we don't add an attribute
7174 for the (unknown and unknowable) upper bound. This should not
7175 cause too much trouble for existing (stupid?) debuggers because
7176 they have to deal with empty upper bounds location descriptions
7177 anyway in order to be able to deal with incomplete array types.
7178 Of course an intelligent debugger (GDB?) should be able to
7179 comprehend that a missing upper bound specification in a array
7180 type used for a storage class `auto' local array variable
7181 indicates that the upper bound is both unknown (at compile- time)
7182 and unknowable (at run-time) due to optimization.
7184 We assume that a MEM rtx is safe because gcc wouldn't put the
7185 value there unless it was going to be used repeatedly in the
7186 function, i.e. for cleanups. */
7187 if (! optimize
|| GET_CODE (SAVE_EXPR_RTL (bound
)) == MEM
)
7189 register dw_die_ref ctx
= lookup_decl_die (current_function_decl
);
7190 register dw_die_ref decl_die
= new_die (DW_TAG_variable
, ctx
);
7191 register rtx loc
= SAVE_EXPR_RTL (bound
);
7193 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7194 it references an outer function's frame. */
7196 if (GET_CODE (loc
) == MEM
)
7198 rtx new_addr
= fix_lexical_addr (XEXP (loc
, 0), bound
);
7200 if (XEXP (loc
, 0) != new_addr
)
7201 loc
= gen_rtx (MEM
, GET_MODE (loc
), new_addr
);
7204 add_AT_flag (decl_die
, DW_AT_artificial
, 1);
7205 add_type_attribute (decl_die
, TREE_TYPE (bound
), 1, 0, ctx
);
7206 add_AT_location_description (decl_die
, DW_AT_location
, loc
);
7207 add_AT_die_ref (subrange_die
, bound_attr
, decl_die
);
7210 /* Else leave out the attribute. */
7216 /* ??? These types of bounds can be created by the Ada front end,
7217 and it isn't clear how to emit debug info for them. */
7225 /* Note that the block of subscript information for an array type also
7226 includes information about the element type of type given array type. */
7229 add_subscript_info (type_die
, type
)
7230 register dw_die_ref type_die
;
7233 #ifndef MIPS_DEBUGGING_INFO
7234 register unsigned dimension_number
;
7236 register tree lower
, upper
;
7237 register dw_die_ref subrange_die
;
7239 /* The GNU compilers represent multidimensional array types as sequences of
7240 one dimensional array types whose element types are themselves array
7241 types. Here we squish that down, so that each multidimensional array
7242 type gets only one array_type DIE in the Dwarf debugging info. The draft
7243 Dwarf specification say that we are allowed to do this kind of
7244 compression in C (because there is no difference between an array or
7245 arrays and a multidimensional array in C) but for other source languages
7246 (e.g. Ada) we probably shouldn't do this. */
7248 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7249 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7250 We work around this by disabling this feature. See also
7251 gen_array_type_die. */
7252 #ifndef MIPS_DEBUGGING_INFO
7253 for (dimension_number
= 0;
7254 TREE_CODE (type
) == ARRAY_TYPE
;
7255 type
= TREE_TYPE (type
), dimension_number
++)
7258 register tree domain
= TYPE_DOMAIN (type
);
7260 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7261 and (in GNU C only) variable bounds. Handle all three forms
7263 subrange_die
= new_die (DW_TAG_subrange_type
, type_die
);
7266 /* We have an array type with specified bounds. */
7267 lower
= TYPE_MIN_VALUE (domain
);
7268 upper
= TYPE_MAX_VALUE (domain
);
7270 /* define the index type. */
7271 if (TREE_TYPE (domain
))
7273 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7274 TREE_TYPE field. We can't emit debug info for this
7275 because it is an unnamed integral type. */
7276 if (TREE_CODE (domain
) == INTEGER_TYPE
7277 && TYPE_NAME (domain
) == NULL_TREE
7278 && TREE_CODE (TREE_TYPE (domain
)) == INTEGER_TYPE
7279 && TYPE_NAME (TREE_TYPE (domain
)) == NULL_TREE
)
7282 add_type_attribute (subrange_die
, TREE_TYPE (domain
), 0, 0,
7286 /* ??? If upper is NULL, the array has unspecified length,
7287 but it does have a lower bound. This happens with Fortran
7289 Since the debugger is definitely going to need to know N
7290 to produce useful results, go ahead and output the lower
7291 bound solo, and hope the debugger can cope. */
7293 add_bound_info (subrange_die
, DW_AT_lower_bound
, lower
);
7295 add_bound_info (subrange_die
, DW_AT_upper_bound
, upper
);
7298 /* We have an array type with an unspecified length. The DWARF-2
7299 spec does not say how to handle this; let's just leave out the
7304 #ifndef MIPS_DEBUGGING_INFO
7310 add_byte_size_attribute (die
, tree_node
)
7312 register tree tree_node
;
7314 register unsigned size
;
7316 switch (TREE_CODE (tree_node
))
7324 case QUAL_UNION_TYPE
:
7325 size
= int_size_in_bytes (tree_node
);
7328 /* For a data member of a struct or union, the DW_AT_byte_size is
7329 generally given as the number of bytes normally allocated for an
7330 object of the *declared* type of the member itself. This is true
7331 even for bit-fields. */
7332 size
= simple_type_size_in_bits (field_type (tree_node
)) / BITS_PER_UNIT
;
7338 /* Note that `size' might be -1 when we get to this point. If it is, that
7339 indicates that the byte size of the entity in question is variable. We
7340 have no good way of expressing this fact in Dwarf at the present time,
7341 so just let the -1 pass on through. */
7343 add_AT_unsigned (die
, DW_AT_byte_size
, size
);
7346 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7347 which specifies the distance in bits from the highest order bit of the
7348 "containing object" for the bit-field to the highest order bit of the
7351 For any given bit-field, the "containing object" is a hypothetical
7352 object (of some integral or enum type) within which the given bit-field
7353 lives. The type of this hypothetical "containing object" is always the
7354 same as the declared type of the individual bit-field itself. The
7355 determination of the exact location of the "containing object" for a
7356 bit-field is rather complicated. It's handled by the
7357 `field_byte_offset' function (above).
7359 Note that it is the size (in bytes) of the hypothetical "containing object"
7360 which will be given in the DW_AT_byte_size attribute for this bit-field.
7361 (See `byte_size_attribute' above). */
7364 add_bit_offset_attribute (die
, decl
)
7365 register dw_die_ref die
;
7368 register unsigned object_offset_in_bytes
= field_byte_offset (decl
);
7369 register tree type
= DECL_BIT_FIELD_TYPE (decl
);
7370 register tree bitpos_tree
= DECL_FIELD_BITPOS (decl
);
7371 register unsigned bitpos_int
;
7372 register unsigned highest_order_object_bit_offset
;
7373 register unsigned highest_order_field_bit_offset
;
7374 register unsigned bit_offset
;
7376 /* Must be a field and a bit field. */
7378 || TREE_CODE (decl
) != FIELD_DECL
)
7381 /* We can't yet handle bit-fields whose offsets are variable, so if we
7382 encounter such things, just return without generating any attribute
7384 if (TREE_CODE (bitpos_tree
) != INTEGER_CST
)
7387 bitpos_int
= (unsigned) TREE_INT_CST_LOW (bitpos_tree
);
7389 /* Note that the bit offset is always the distance (in bits) from the
7390 highest-order bit of the "containing object" to the highest-order bit of
7391 the bit-field itself. Since the "high-order end" of any object or field
7392 is different on big-endian and little-endian machines, the computation
7393 below must take account of these differences. */
7394 highest_order_object_bit_offset
= object_offset_in_bytes
* BITS_PER_UNIT
;
7395 highest_order_field_bit_offset
= bitpos_int
;
7397 if (! BYTES_BIG_ENDIAN
)
7399 highest_order_field_bit_offset
7400 += (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl
));
7402 highest_order_object_bit_offset
+= simple_type_size_in_bits (type
);
7406 = (! BYTES_BIG_ENDIAN
7407 ? highest_order_object_bit_offset
- highest_order_field_bit_offset
7408 : highest_order_field_bit_offset
- highest_order_object_bit_offset
);
7410 add_AT_unsigned (die
, DW_AT_bit_offset
, bit_offset
);
7413 /* For a FIELD_DECL node which represents a bit field, output an attribute
7414 which specifies the length in bits of the given field. */
7417 add_bit_size_attribute (die
, decl
)
7418 register dw_die_ref die
;
7421 /* Must be a field and a bit field. */
7422 if (TREE_CODE (decl
) != FIELD_DECL
7423 || ! DECL_BIT_FIELD_TYPE (decl
))
7425 add_AT_unsigned (die
, DW_AT_bit_size
,
7426 (unsigned) TREE_INT_CST_LOW (DECL_SIZE (decl
)));
7429 /* If the compiled language is ANSI C, then add a 'prototyped'
7430 attribute, if arg types are given for the parameters of a function. */
7433 add_prototyped_attribute (die
, func_type
)
7434 register dw_die_ref die
;
7435 register tree func_type
;
7437 if (get_AT_unsigned (comp_unit_die
, DW_AT_language
) == DW_LANG_C89
7438 && TYPE_ARG_TYPES (func_type
) != NULL
)
7439 add_AT_flag (die
, DW_AT_prototyped
, 1);
7443 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7444 by looking in either the type declaration or object declaration
7448 add_abstract_origin_attribute (die
, origin
)
7449 register dw_die_ref die
;
7450 register tree origin
;
7452 dw_die_ref origin_die
= NULL
;
7453 if (TREE_CODE_CLASS (TREE_CODE (origin
)) == 'd')
7454 origin_die
= lookup_decl_die (origin
);
7455 else if (TREE_CODE_CLASS (TREE_CODE (origin
)) == 't')
7456 origin_die
= lookup_type_die (origin
);
7458 add_AT_die_ref (die
, DW_AT_abstract_origin
, origin_die
);
7461 /* We do not currently support the pure_virtual attribute. */
7464 add_pure_or_virtual_attribute (die
, func_decl
)
7465 register dw_die_ref die
;
7466 register tree func_decl
;
7468 if (DECL_VINDEX (func_decl
))
7470 add_AT_unsigned (die
, DW_AT_virtuality
, DW_VIRTUALITY_virtual
);
7471 add_AT_loc (die
, DW_AT_vtable_elem_location
,
7472 new_loc_descr (DW_OP_constu
,
7473 TREE_INT_CST_LOW (DECL_VINDEX (func_decl
)),
7476 /* GNU extension: Record what type this method came from originally. */
7477 if (debug_info_level
> DINFO_LEVEL_TERSE
)
7478 add_AT_die_ref (die
, DW_AT_containing_type
,
7479 lookup_type_die (DECL_CONTEXT (func_decl
)));
7483 /* Add source coordinate attributes for the given decl. */
7486 add_src_coords_attributes (die
, decl
)
7487 register dw_die_ref die
;
7490 register unsigned file_index
= lookup_filename (DECL_SOURCE_FILE (decl
));
7492 add_AT_unsigned (die
, DW_AT_decl_file
, file_index
);
7493 add_AT_unsigned (die
, DW_AT_decl_line
, DECL_SOURCE_LINE (decl
));
7496 /* Add an DW_AT_name attribute and source coordinate attribute for the
7497 given decl, but only if it actually has a name. */
7500 add_name_and_src_coords_attributes (die
, decl
)
7501 register dw_die_ref die
;
7504 register tree decl_name
;
7506 decl_name
= DECL_NAME (decl
);
7507 if (decl_name
!= NULL
&& IDENTIFIER_POINTER (decl_name
) != NULL
)
7509 add_name_attribute (die
, dwarf2_name (decl
, 0));
7510 add_src_coords_attributes (die
, decl
);
7511 if ((TREE_CODE (decl
) == FUNCTION_DECL
|| TREE_CODE (decl
) == VAR_DECL
)
7512 && DECL_ASSEMBLER_NAME (decl
) != DECL_NAME (decl
))
7513 add_AT_string (die
, DW_AT_MIPS_linkage_name
,
7514 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl
)));
7518 /* Push a new declaration scope. */
7521 push_decl_scope (scope
)
7524 tree containing_scope
;
7527 /* Make room in the decl_scope_table, if necessary. */
7528 if (decl_scope_table_allocated
== decl_scope_depth
)
7530 decl_scope_table_allocated
+= DECL_SCOPE_TABLE_INCREMENT
;
7532 = (decl_scope_node
*) xrealloc (decl_scope_table
,
7533 (decl_scope_table_allocated
7534 * sizeof (decl_scope_node
)));
7537 decl_scope_table
[decl_scope_depth
].scope
= scope
;
7539 /* Sometimes, while recursively emitting subtypes within a class type,
7540 we end up recuring on a subtype at a higher level then the current
7541 subtype. In such a case, we need to search the decl_scope_table to
7542 find the parent of this subtype. */
7544 if (TREE_CODE_CLASS (TREE_CODE (scope
)) == 't')
7545 containing_scope
= TYPE_CONTEXT (scope
);
7547 containing_scope
= NULL_TREE
;
7549 /* The normal case. */
7550 if (decl_scope_depth
== 0
7551 || containing_scope
== NULL_TREE
7552 /* Ignore namespaces for the moment. */
7553 || TREE_CODE (containing_scope
) == NAMESPACE_DECL
7554 || containing_scope
== decl_scope_table
[decl_scope_depth
- 1].scope
)
7555 decl_scope_table
[decl_scope_depth
].previous
= decl_scope_depth
- 1;
7558 /* We need to search for the containing_scope. */
7559 for (i
= 0; i
< decl_scope_depth
; i
++)
7560 if (decl_scope_table
[i
].scope
== containing_scope
)
7563 if (i
== decl_scope_depth
)
7566 decl_scope_table
[decl_scope_depth
].previous
= i
;
7572 /* Return the DIE for the scope that immediately contains this declaration. */
7575 scope_die_for (t
, context_die
)
7577 register dw_die_ref context_die
;
7579 register dw_die_ref scope_die
= NULL
;
7580 register tree containing_scope
;
7583 /* Walk back up the declaration tree looking for a place to define
7585 if (TREE_CODE_CLASS (TREE_CODE (t
)) == 't')
7586 containing_scope
= TYPE_CONTEXT (t
);
7587 else if (TREE_CODE (t
) == FUNCTION_DECL
&& DECL_VINDEX (t
))
7588 containing_scope
= decl_class_context (t
);
7590 containing_scope
= DECL_CONTEXT (t
);
7592 /* Ignore namespaces for the moment. */
7593 if (containing_scope
&& TREE_CODE (containing_scope
) == NAMESPACE_DECL
)
7594 containing_scope
= NULL_TREE
;
7596 /* Function-local tags and functions get stuck in limbo until they are
7597 fixed up by decls_for_scope. */
7598 if (context_die
== NULL
&& containing_scope
!= NULL_TREE
7599 && (TREE_CODE (t
) == FUNCTION_DECL
|| is_tagged_type (t
)))
7602 if (containing_scope
== NULL_TREE
)
7603 scope_die
= comp_unit_die
;
7606 for (i
= decl_scope_depth
- 1, scope_die
= context_die
;
7607 i
>= 0 && decl_scope_table
[i
].scope
!= containing_scope
;
7608 (scope_die
= scope_die
->die_parent
,
7609 i
= decl_scope_table
[i
].previous
))
7612 /* ??? Integrate_decl_tree does not handle BLOCK_TYPE_TAGS, nor
7613 does it try to handle types defined by TYPE_DECLs. Such types
7614 thus have an incorrect TYPE_CONTEXT, which points to the block
7615 they were originally defined in, instead of the current block
7616 created by function inlining. We try to detect that here and
7619 if (i
< 0 && scope_die
== comp_unit_die
7620 && TREE_CODE (containing_scope
) == BLOCK
7621 && is_tagged_type (t
)
7622 && (block_ultimate_origin (decl_scope_table
[decl_scope_depth
- 1].scope
)
7623 == containing_scope
))
7625 scope_die
= context_die
;
7626 /* Since the checks below are no longer applicable. */
7632 if (scope_die
!= comp_unit_die
7633 || TREE_CODE_CLASS (TREE_CODE (containing_scope
)) != 't')
7635 if (debug_info_level
> DINFO_LEVEL_TERSE
7636 && !TREE_ASM_WRITTEN (containing_scope
))
7644 /* Pop a declaration scope. */
7648 if (decl_scope_depth
<= 0)
7653 /* Many forms of DIEs require a "type description" attribute. This
7654 routine locates the proper "type descriptor" die for the type given
7655 by 'type', and adds an DW_AT_type attribute below the given die. */
7658 add_type_attribute (object_die
, type
, decl_const
, decl_volatile
, context_die
)
7659 register dw_die_ref object_die
;
7661 register int decl_const
;
7662 register int decl_volatile
;
7663 register dw_die_ref context_die
;
7665 register enum tree_code code
= TREE_CODE (type
);
7666 register dw_die_ref type_die
= NULL
;
7668 /* ??? If this type is an unnamed subrange type of an integral or
7669 floating-point type, use the inner type. This is because we have no
7670 support for unnamed types in base_type_die. This can happen if this is
7671 an Ada subrange type. Correct solution is emit a subrange type die. */
7672 if ((code
== INTEGER_TYPE
|| code
== REAL_TYPE
)
7673 && TREE_TYPE (type
) != 0 && TYPE_NAME (type
) == 0)
7674 type
= TREE_TYPE (type
), code
= TREE_CODE (type
);
7676 if (code
== ERROR_MARK
)
7679 /* Handle a special case. For functions whose return type is void, we
7680 generate *no* type attribute. (Note that no object may have type
7681 `void', so this only applies to function return types). */
7682 if (code
== VOID_TYPE
)
7685 type_die
= modified_type_die (type
,
7686 decl_const
|| TYPE_READONLY (type
),
7687 decl_volatile
|| TYPE_VOLATILE (type
),
7689 if (type_die
!= NULL
)
7690 add_AT_die_ref (object_die
, DW_AT_type
, type_die
);
7693 /* Given a tree pointer to a struct, class, union, or enum type node, return
7694 a pointer to the (string) tag name for the given type, or zero if the type
7695 was declared without a tag. */
7701 register char *name
= 0;
7703 if (TYPE_NAME (type
) != 0)
7705 register tree t
= 0;
7707 /* Find the IDENTIFIER_NODE for the type name. */
7708 if (TREE_CODE (TYPE_NAME (type
)) == IDENTIFIER_NODE
)
7709 t
= TYPE_NAME (type
);
7711 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7712 a TYPE_DECL node, regardless of whether or not a `typedef' was
7714 else if (TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
7715 && ! DECL_IGNORED_P (TYPE_NAME (type
)))
7716 t
= DECL_NAME (TYPE_NAME (type
));
7718 /* Now get the name as a string, or invent one. */
7720 name
= IDENTIFIER_POINTER (t
);
7723 return (name
== 0 || *name
== '\0') ? 0 : name
;
7726 /* Return the type associated with a data member, make a special check
7727 for bit field types. */
7730 member_declared_type (member
)
7731 register tree member
;
7733 return (DECL_BIT_FIELD_TYPE (member
)
7734 ? DECL_BIT_FIELD_TYPE (member
)
7735 : TREE_TYPE (member
));
7738 /* Get the decl's label, as described by its RTL. This may be different
7739 from the DECL_NAME name used in the source file. */
7743 decl_start_label (decl
)
7748 x
= DECL_RTL (decl
);
7749 if (GET_CODE (x
) != MEM
)
7753 if (GET_CODE (x
) != SYMBOL_REF
)
7756 fnname
= XSTR (x
, 0);
7761 /* These routines generate the internal representation of the DIE's for
7762 the compilation unit. Debugging information is collected by walking
7763 the declaration trees passed in from dwarf2out_decl(). */
7766 gen_array_type_die (type
, context_die
)
7768 register dw_die_ref context_die
;
7770 register dw_die_ref scope_die
= scope_die_for (type
, context_die
);
7771 register dw_die_ref array_die
;
7772 register tree element_type
;
7774 /* ??? The SGI dwarf reader fails for array of array of enum types unless
7775 the inner array type comes before the outer array type. Thus we must
7776 call gen_type_die before we call new_die. See below also. */
7777 #ifdef MIPS_DEBUGGING_INFO
7778 gen_type_die (TREE_TYPE (type
), context_die
);
7781 array_die
= new_die (DW_TAG_array_type
, scope_die
);
7784 /* We default the array ordering. SDB will probably do
7785 the right things even if DW_AT_ordering is not present. It's not even
7786 an issue until we start to get into multidimensional arrays anyway. If
7787 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
7788 then we'll have to put the DW_AT_ordering attribute back in. (But if
7789 and when we find out that we need to put these in, we will only do so
7790 for multidimensional arrays. */
7791 add_AT_unsigned (array_die
, DW_AT_ordering
, DW_ORD_row_major
);
7794 #ifdef MIPS_DEBUGGING_INFO
7795 /* The SGI compilers handle arrays of unknown bound by setting
7796 AT_declaration and not emitting any subrange DIEs. */
7797 if (! TYPE_DOMAIN (type
))
7798 add_AT_unsigned (array_die
, DW_AT_declaration
, 1);
7801 add_subscript_info (array_die
, type
);
7803 equate_type_number_to_die (type
, array_die
);
7805 /* Add representation of the type of the elements of this array type. */
7806 element_type
= TREE_TYPE (type
);
7808 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7809 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7810 We work around this by disabling this feature. See also
7811 add_subscript_info. */
7812 #ifndef MIPS_DEBUGGING_INFO
7813 while (TREE_CODE (element_type
) == ARRAY_TYPE
)
7814 element_type
= TREE_TYPE (element_type
);
7816 gen_type_die (element_type
, context_die
);
7819 add_type_attribute (array_die
, element_type
, 0, 0, context_die
);
7823 gen_set_type_die (type
, context_die
)
7825 register dw_die_ref context_die
;
7827 register dw_die_ref type_die
7828 = new_die (DW_TAG_set_type
, scope_die_for (type
, context_die
));
7830 equate_type_number_to_die (type
, type_die
);
7831 add_type_attribute (type_die
, TREE_TYPE (type
), 0, 0, context_die
);
7836 gen_entry_point_die (decl
, context_die
)
7838 register dw_die_ref context_die
;
7840 register tree origin
= decl_ultimate_origin (decl
);
7841 register dw_die_ref decl_die
= new_die (DW_TAG_entry_point
, context_die
);
7843 add_abstract_origin_attribute (decl_die
, origin
);
7846 add_name_and_src_coords_attributes (decl_die
, decl
);
7847 add_type_attribute (decl_die
, TREE_TYPE (TREE_TYPE (decl
)),
7851 if (DECL_ABSTRACT (decl
))
7852 equate_decl_number_to_die (decl
, decl_die
);
7854 add_AT_lbl_id (decl_die
, DW_AT_low_pc
, decl_start_label (decl
));
7858 /* Remember a type in the pending_types_list. */
7864 if (pending_types
== pending_types_allocated
)
7866 pending_types_allocated
+= PENDING_TYPES_INCREMENT
;
7868 = (tree
*) xrealloc (pending_types_list
,
7869 sizeof (tree
) * pending_types_allocated
);
7872 pending_types_list
[pending_types
++] = type
;
7875 /* Output any pending types (from the pending_types list) which we can output
7876 now (taking into account the scope that we are working on now).
7878 For each type output, remove the given type from the pending_types_list
7879 *before* we try to output it. */
7882 output_pending_types_for_scope (context_die
)
7883 register dw_die_ref context_die
;
7887 while (pending_types
)
7890 type
= pending_types_list
[pending_types
];
7891 gen_type_die (type
, context_die
);
7892 if (!TREE_ASM_WRITTEN (type
))
7897 /* Generate a DIE to represent an inlined instance of an enumeration type. */
7900 gen_inlined_enumeration_type_die (type
, context_die
)
7902 register dw_die_ref context_die
;
7904 register dw_die_ref type_die
= new_die (DW_TAG_enumeration_type
,
7905 scope_die_for (type
, context_die
));
7907 if (!TREE_ASM_WRITTEN (type
))
7909 add_abstract_origin_attribute (type_die
, type
);
7912 /* Generate a DIE to represent an inlined instance of a structure type. */
7915 gen_inlined_structure_type_die (type
, context_die
)
7917 register dw_die_ref context_die
;
7919 register dw_die_ref type_die
= new_die (DW_TAG_structure_type
,
7920 scope_die_for (type
, context_die
));
7922 if (!TREE_ASM_WRITTEN (type
))
7924 add_abstract_origin_attribute (type_die
, type
);
7927 /* Generate a DIE to represent an inlined instance of a union type. */
7930 gen_inlined_union_type_die (type
, context_die
)
7932 register dw_die_ref context_die
;
7934 register dw_die_ref type_die
= new_die (DW_TAG_union_type
,
7935 scope_die_for (type
, context_die
));
7937 if (!TREE_ASM_WRITTEN (type
))
7939 add_abstract_origin_attribute (type_die
, type
);
7942 /* Generate a DIE to represent an enumeration type. Note that these DIEs
7943 include all of the information about the enumeration values also. Each
7944 enumerated type name/value is listed as a child of the enumerated type
7948 gen_enumeration_type_die (type
, context_die
)
7950 register dw_die_ref context_die
;
7952 register dw_die_ref type_die
= lookup_type_die (type
);
7954 if (type_die
== NULL
)
7956 type_die
= new_die (DW_TAG_enumeration_type
,
7957 scope_die_for (type
, context_die
));
7958 equate_type_number_to_die (type
, type_die
);
7959 add_name_attribute (type_die
, type_tag (type
));
7961 else if (! TYPE_SIZE (type
))
7964 remove_AT (type_die
, DW_AT_declaration
);
7966 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
7967 given enum type is incomplete, do not generate the DW_AT_byte_size
7968 attribute or the DW_AT_element_list attribute. */
7969 if (TYPE_SIZE (type
))
7973 TREE_ASM_WRITTEN (type
) = 1;
7974 add_byte_size_attribute (type_die
, type
);
7975 if (TYPE_STUB_DECL (type
) != NULL_TREE
)
7976 add_src_coords_attributes (type_die
, TYPE_STUB_DECL (type
));
7978 /* If the first reference to this type was as the return type of an
7979 inline function, then it may not have a parent. Fix this now. */
7980 if (type_die
->die_parent
== NULL
)
7981 add_child_die (scope_die_for (type
, context_die
), type_die
);
7983 for (link
= TYPE_FIELDS (type
);
7984 link
!= NULL
; link
= TREE_CHAIN (link
))
7986 register dw_die_ref enum_die
= new_die (DW_TAG_enumerator
, type_die
);
7988 add_name_attribute (enum_die
,
7989 IDENTIFIER_POINTER (TREE_PURPOSE (link
)));
7990 add_AT_unsigned (enum_die
, DW_AT_const_value
,
7991 (unsigned) TREE_INT_CST_LOW (TREE_VALUE (link
)));
7995 add_AT_flag (type_die
, DW_AT_declaration
, 1);
7999 /* Generate a DIE to represent either a real live formal parameter decl or to
8000 represent just the type of some formal parameter position in some function
8003 Note that this routine is a bit unusual because its argument may be a
8004 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8005 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8006 node. If it's the former then this function is being called to output a
8007 DIE to represent a formal parameter object (or some inlining thereof). If
8008 it's the latter, then this function is only being called to output a
8009 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8010 argument type of some subprogram type. */
8013 gen_formal_parameter_die (node
, context_die
)
8015 register dw_die_ref context_die
;
8017 register dw_die_ref parm_die
8018 = new_die (DW_TAG_formal_parameter
, context_die
);
8019 register tree origin
;
8021 switch (TREE_CODE_CLASS (TREE_CODE (node
)))
8024 origin
= decl_ultimate_origin (node
);
8026 add_abstract_origin_attribute (parm_die
, origin
);
8029 add_name_and_src_coords_attributes (parm_die
, node
);
8030 add_type_attribute (parm_die
, TREE_TYPE (node
),
8031 TREE_READONLY (node
),
8032 TREE_THIS_VOLATILE (node
),
8034 if (DECL_ARTIFICIAL (node
))
8035 add_AT_flag (parm_die
, DW_AT_artificial
, 1);
8038 equate_decl_number_to_die (node
, parm_die
);
8039 if (! DECL_ABSTRACT (node
))
8040 add_location_or_const_value_attribute (parm_die
, node
);
8045 /* We were called with some kind of a ..._TYPE node. */
8046 add_type_attribute (parm_die
, node
, 0, 0, context_die
);
8056 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8057 at the end of an (ANSI prototyped) formal parameters list. */
8060 gen_unspecified_parameters_die (decl_or_type
, context_die
)
8061 register tree decl_or_type
;
8062 register dw_die_ref context_die
;
8064 new_die (DW_TAG_unspecified_parameters
, context_die
);
8067 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8068 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8069 parameters as specified in some function type specification (except for
8070 those which appear as part of a function *definition*).
8072 Note we must be careful here to output all of the parameter DIEs before*
8073 we output any DIEs needed to represent the types of the formal parameters.
8074 This keeps svr4 SDB happy because it (incorrectly) thinks that the first
8075 non-parameter DIE it sees ends the formal parameter list. */
8078 gen_formal_types_die (function_or_method_type
, context_die
)
8079 register tree function_or_method_type
;
8080 register dw_die_ref context_die
;
8083 register tree formal_type
= NULL
;
8084 register tree first_parm_type
= TYPE_ARG_TYPES (function_or_method_type
);
8087 /* In the case where we are generating a formal types list for a C++
8088 non-static member function type, skip over the first thing on the
8089 TYPE_ARG_TYPES list because it only represents the type of the hidden
8090 `this pointer'. The debugger should be able to figure out (without
8091 being explicitly told) that this non-static member function type takes a
8092 `this pointer' and should be able to figure what the type of that hidden
8093 parameter is from the DW_AT_member attribute of the parent
8094 DW_TAG_subroutine_type DIE. */
8095 if (TREE_CODE (function_or_method_type
) == METHOD_TYPE
)
8096 first_parm_type
= TREE_CHAIN (first_parm_type
);
8099 /* Make our first pass over the list of formal parameter types and output a
8100 DW_TAG_formal_parameter DIE for each one. */
8101 for (link
= first_parm_type
; link
; link
= TREE_CHAIN (link
))
8103 register dw_die_ref parm_die
;
8105 formal_type
= TREE_VALUE (link
);
8106 if (formal_type
== void_type_node
)
8109 /* Output a (nameless) DIE to represent the formal parameter itself. */
8110 parm_die
= gen_formal_parameter_die (formal_type
, context_die
);
8111 if (TREE_CODE (function_or_method_type
) == METHOD_TYPE
8112 && link
== first_parm_type
)
8113 add_AT_flag (parm_die
, DW_AT_artificial
, 1);
8116 /* If this function type has an ellipsis, add a
8117 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8118 if (formal_type
!= void_type_node
)
8119 gen_unspecified_parameters_die (function_or_method_type
, context_die
);
8121 /* Make our second (and final) pass over the list of formal parameter types
8122 and output DIEs to represent those types (as necessary). */
8123 for (link
= TYPE_ARG_TYPES (function_or_method_type
);
8125 link
= TREE_CHAIN (link
))
8127 formal_type
= TREE_VALUE (link
);
8128 if (formal_type
== void_type_node
)
8131 gen_type_die (formal_type
, context_die
);
8135 /* Generate a DIE to represent a declared function (either file-scope or
8139 gen_subprogram_die (decl
, context_die
)
8141 register dw_die_ref context_die
;
8143 char label_id
[MAX_ARTIFICIAL_LABEL_BYTES
];
8144 register tree origin
= decl_ultimate_origin (decl
);
8145 register dw_die_ref subr_die
;
8146 register rtx fp_reg
;
8147 register tree fn_arg_types
;
8148 register tree outer_scope
;
8149 register dw_die_ref old_die
= lookup_decl_die (decl
);
8150 register int declaration
8151 = (current_function_decl
!= decl
8153 && (context_die
->die_tag
== DW_TAG_structure_type
8154 || context_die
->die_tag
== DW_TAG_union_type
)));
8158 subr_die
= new_die (DW_TAG_subprogram
, context_die
);
8159 add_abstract_origin_attribute (subr_die
, origin
);
8161 else if (old_die
&& DECL_ABSTRACT (decl
)
8162 && get_AT_unsigned (old_die
, DW_AT_inline
))
8164 /* This must be a redefinition of an extern inline function.
8165 We can just reuse the old die here. */
8168 /* Clear out the inlined attribute and parm types. */
8169 remove_AT (subr_die
, DW_AT_inline
);
8170 remove_children (subr_die
);
8174 register unsigned file_index
8175 = lookup_filename (DECL_SOURCE_FILE (decl
));
8177 if (get_AT_flag (old_die
, DW_AT_declaration
) != 1)
8180 /* If the definition comes from the same place as the declaration,
8181 maybe use the old DIE. We always want the DIE for this function
8182 that has the *_pc attributes to be under comp_unit_die so the
8183 debugger can find it. For inlines, that is the concrete instance,
8184 so we can use the old DIE here. For non-inline methods, we want a
8185 specification DIE at toplevel, so we need a new DIE. For local
8186 class methods, this does not apply. */
8187 if ((DECL_ABSTRACT (decl
) || old_die
->die_parent
== comp_unit_die
8188 || context_die
== NULL
)
8189 && get_AT_unsigned (old_die
, DW_AT_decl_file
) == file_index
8190 && (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8191 == DECL_SOURCE_LINE (decl
)))
8195 /* Clear out the declaration attribute and the parm types. */
8196 remove_AT (subr_die
, DW_AT_declaration
);
8197 remove_children (subr_die
);
8201 subr_die
= new_die (DW_TAG_subprogram
, context_die
);
8202 add_AT_die_ref (subr_die
, DW_AT_specification
, old_die
);
8203 if (get_AT_unsigned (old_die
, DW_AT_decl_file
) != file_index
)
8204 add_AT_unsigned (subr_die
, DW_AT_decl_file
, file_index
);
8205 if (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8206 != DECL_SOURCE_LINE (decl
))
8208 (subr_die
, DW_AT_decl_line
, DECL_SOURCE_LINE (decl
));
8213 register dw_die_ref scope_die
;
8215 if (DECL_CONTEXT (decl
))
8216 scope_die
= scope_die_for (decl
, context_die
);
8218 /* Don't put block extern declarations under comp_unit_die. */
8219 scope_die
= context_die
;
8221 subr_die
= new_die (DW_TAG_subprogram
, scope_die
);
8223 if (TREE_PUBLIC (decl
))
8224 add_AT_flag (subr_die
, DW_AT_external
, 1);
8226 add_name_and_src_coords_attributes (subr_die
, decl
);
8227 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8229 register tree type
= TREE_TYPE (decl
);
8231 add_prototyped_attribute (subr_die
, type
);
8232 add_type_attribute (subr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8235 add_pure_or_virtual_attribute (subr_die
, decl
);
8236 if (DECL_ARTIFICIAL (decl
))
8237 add_AT_flag (subr_die
, DW_AT_artificial
, 1);
8238 if (TREE_PROTECTED (decl
))
8239 add_AT_unsigned (subr_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8240 else if (TREE_PRIVATE (decl
))
8241 add_AT_unsigned (subr_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8246 add_AT_flag (subr_die
, DW_AT_declaration
, 1);
8248 /* The first time we see a member function, it is in the context of
8249 the class to which it belongs. We make sure of this by emitting
8250 the class first. The next time is the definition, which is
8251 handled above. The two may come from the same source text. */
8252 if (DECL_CONTEXT (decl
))
8253 equate_decl_number_to_die (decl
, subr_die
);
8255 else if (DECL_ABSTRACT (decl
))
8257 /* ??? Checking DECL_DEFER_OUTPUT is correct for static inline functions,
8258 but not for extern inline functions. We can't get this completely
8259 correct because information about whether the function was declared
8260 inline is not saved anywhere. */
8261 if (DECL_DEFER_OUTPUT (decl
))
8263 if (DECL_INLINE (decl
))
8264 add_AT_unsigned (subr_die
, DW_AT_inline
, DW_INL_declared_inlined
);
8266 add_AT_unsigned (subr_die
, DW_AT_inline
,
8267 DW_INL_declared_not_inlined
);
8269 else if (DECL_INLINE (decl
))
8270 add_AT_unsigned (subr_die
, DW_AT_inline
, DW_INL_inlined
);
8274 equate_decl_number_to_die (decl
, subr_die
);
8276 else if (!DECL_EXTERNAL (decl
))
8278 if (origin
== NULL_TREE
)
8279 equate_decl_number_to_die (decl
, subr_die
);
8281 ASM_GENERATE_INTERNAL_LABEL (label_id
, FUNC_BEGIN_LABEL
,
8282 current_funcdef_number
);
8283 add_AT_lbl_id (subr_die
, DW_AT_low_pc
, label_id
);
8284 ASM_GENERATE_INTERNAL_LABEL (label_id
, FUNC_END_LABEL
,
8285 current_funcdef_number
);
8286 add_AT_lbl_id (subr_die
, DW_AT_high_pc
, label_id
);
8288 add_pubname (decl
, subr_die
);
8289 add_arange (decl
, subr_die
);
8291 #ifdef MIPS_DEBUGGING_INFO
8292 /* Add a reference to the FDE for this routine. */
8293 add_AT_fde_ref (subr_die
, DW_AT_MIPS_fde
, current_funcdef_fde
);
8296 /* Define the "frame base" location for this routine. We use the
8297 frame pointer or stack pointer registers, since the RTL for local
8298 variables is relative to one of them. */
8300 = frame_pointer_needed
? hard_frame_pointer_rtx
: stack_pointer_rtx
;
8301 add_AT_loc (subr_die
, DW_AT_frame_base
, reg_loc_descriptor (fp_reg
));
8304 /* ??? This fails for nested inline functions, because context_display
8305 is not part of the state saved/restored for inline functions. */
8306 if (current_function_needs_context
)
8307 add_AT_location_description (subr_die
, DW_AT_static_link
,
8308 lookup_static_chain (decl
));
8312 /* Now output descriptions of the arguments for this function. This gets
8313 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8314 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8315 `...' at the end of the formal parameter list. In order to find out if
8316 there was a trailing ellipsis or not, we must instead look at the type
8317 associated with the FUNCTION_DECL. This will be a node of type
8318 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8319 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8320 an ellipsis at the end. */
8321 push_decl_scope (decl
);
8323 /* In the case where we are describing a mere function declaration, all we
8324 need to do here (and all we *can* do here) is to describe the *types* of
8325 its formal parameters. */
8326 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
8328 else if (declaration
)
8329 gen_formal_types_die (TREE_TYPE (decl
), subr_die
);
8332 /* Generate DIEs to represent all known formal parameters */
8333 register tree arg_decls
= DECL_ARGUMENTS (decl
);
8336 /* When generating DIEs, generate the unspecified_parameters DIE
8337 instead if we come across the arg "__builtin_va_alist" */
8338 for (parm
= arg_decls
; parm
; parm
= TREE_CHAIN (parm
))
8339 if (TREE_CODE (parm
) == PARM_DECL
)
8341 if (DECL_NAME (parm
)
8342 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm
)),
8343 "__builtin_va_alist"))
8344 gen_unspecified_parameters_die (parm
, subr_die
);
8346 gen_decl_die (parm
, subr_die
);
8349 /* Decide whether we need a unspecified_parameters DIE at the end.
8350 There are 2 more cases to do this for: 1) the ansi ... declaration -
8351 this is detectable when the end of the arg list is not a
8352 void_type_node 2) an unprototyped function declaration (not a
8353 definition). This just means that we have no info about the
8354 parameters at all. */
8355 fn_arg_types
= TYPE_ARG_TYPES (TREE_TYPE (decl
));
8356 if (fn_arg_types
!= NULL
)
8358 /* this is the prototyped case, check for ... */
8359 if (TREE_VALUE (tree_last (fn_arg_types
)) != void_type_node
)
8360 gen_unspecified_parameters_die (decl
, subr_die
);
8362 else if (DECL_INITIAL (decl
) == NULL_TREE
)
8363 gen_unspecified_parameters_die (decl
, subr_die
);
8366 /* Output Dwarf info for all of the stuff within the body of the function
8367 (if it has one - it may be just a declaration). */
8368 outer_scope
= DECL_INITIAL (decl
);
8370 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8371 node created to represent a function. This outermost BLOCK actually
8372 represents the outermost binding contour for the function, i.e. the
8373 contour in which the function's formal parameters and labels get
8374 declared. Curiously, it appears that the front end doesn't actually
8375 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8376 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8377 list for the function instead.) The BLOCK_VARS list for the
8378 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8379 the function however, and we output DWARF info for those in
8380 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8381 node representing the function's outermost pair of curly braces, and
8382 any blocks used for the base and member initializers of a C++
8383 constructor function. */
8384 if (! declaration
&& TREE_CODE (outer_scope
) != ERROR_MARK
)
8386 current_function_has_inlines
= 0;
8387 decls_for_scope (outer_scope
, subr_die
, 0);
8389 #if 0 && defined (MIPS_DEBUGGING_INFO)
8390 if (current_function_has_inlines
)
8392 add_AT_flag (subr_die
, DW_AT_MIPS_has_inlines
, 1);
8393 if (! comp_unit_has_inlines
)
8395 add_AT_flag (comp_unit_die
, DW_AT_MIPS_has_inlines
, 1);
8396 comp_unit_has_inlines
= 1;
8405 /* Generate a DIE to represent a declared data object. */
8408 gen_variable_die (decl
, context_die
)
8410 register dw_die_ref context_die
;
8412 register tree origin
= decl_ultimate_origin (decl
);
8413 register dw_die_ref var_die
= new_die (DW_TAG_variable
, context_die
);
8415 dw_die_ref old_die
= lookup_decl_die (decl
);
8417 = (DECL_EXTERNAL (decl
)
8418 || current_function_decl
!= decl_function_context (decl
)
8419 || context_die
->die_tag
== DW_TAG_structure_type
8420 || context_die
->die_tag
== DW_TAG_union_type
);
8423 add_abstract_origin_attribute (var_die
, origin
);
8424 /* Loop unrolling can create multiple blocks that refer to the same
8425 static variable, so we must test for the DW_AT_declaration flag. */
8426 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8427 copy decls and set the DECL_ABSTRACT flag on them instead of
8429 else if (old_die
&& TREE_STATIC (decl
)
8430 && get_AT_flag (old_die
, DW_AT_declaration
) == 1)
8432 /* ??? This is an instantiation of a C++ class level static. */
8433 add_AT_die_ref (var_die
, DW_AT_specification
, old_die
);
8434 if (DECL_NAME (decl
))
8436 register unsigned file_index
8437 = lookup_filename (DECL_SOURCE_FILE (decl
));
8439 if (get_AT_unsigned (old_die
, DW_AT_decl_file
) != file_index
)
8440 add_AT_unsigned (var_die
, DW_AT_decl_file
, file_index
);
8442 if (get_AT_unsigned (old_die
, DW_AT_decl_line
)
8443 != DECL_SOURCE_LINE (decl
))
8445 add_AT_unsigned (var_die
, DW_AT_decl_line
,
8446 DECL_SOURCE_LINE (decl
));
8451 add_name_and_src_coords_attributes (var_die
, decl
);
8452 add_type_attribute (var_die
, TREE_TYPE (decl
),
8453 TREE_READONLY (decl
),
8454 TREE_THIS_VOLATILE (decl
), context_die
);
8456 if (TREE_PUBLIC (decl
))
8457 add_AT_flag (var_die
, DW_AT_external
, 1);
8459 if (DECL_ARTIFICIAL (decl
))
8460 add_AT_flag (var_die
, DW_AT_artificial
, 1);
8462 if (TREE_PROTECTED (decl
))
8463 add_AT_unsigned (var_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8465 else if (TREE_PRIVATE (decl
))
8466 add_AT_unsigned (var_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8470 add_AT_flag (var_die
, DW_AT_declaration
, 1);
8472 if ((declaration
&& decl_class_context (decl
)) || DECL_ABSTRACT (decl
))
8473 equate_decl_number_to_die (decl
, var_die
);
8475 if (! declaration
&& ! DECL_ABSTRACT (decl
))
8477 equate_decl_number_to_die (decl
, var_die
);
8478 add_location_or_const_value_attribute (var_die
, decl
);
8479 add_pubname (decl
, var_die
);
8483 /* Generate a DIE to represent a label identifier. */
8486 gen_label_die (decl
, context_die
)
8488 register dw_die_ref context_die
;
8490 register tree origin
= decl_ultimate_origin (decl
);
8491 register dw_die_ref lbl_die
= new_die (DW_TAG_label
, context_die
);
8493 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8494 char label2
[MAX_ARTIFICIAL_LABEL_BYTES
];
8497 add_abstract_origin_attribute (lbl_die
, origin
);
8499 add_name_and_src_coords_attributes (lbl_die
, decl
);
8501 if (DECL_ABSTRACT (decl
))
8502 equate_decl_number_to_die (decl
, lbl_die
);
8505 insn
= DECL_RTL (decl
);
8506 if (GET_CODE (insn
) == CODE_LABEL
)
8508 /* When optimization is enabled (via -O) some parts of the compiler
8509 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8510 represent source-level labels which were explicitly declared by
8511 the user. This really shouldn't be happening though, so catch
8512 it if it ever does happen. */
8513 if (INSN_DELETED_P (insn
))
8516 sprintf (label2
, INSN_LABEL_FMT
, current_funcdef_number
);
8517 ASM_GENERATE_INTERNAL_LABEL (label
, label2
,
8518 (unsigned) INSN_UID (insn
));
8519 add_AT_lbl_id (lbl_die
, DW_AT_low_pc
, label
);
8524 /* Generate a DIE for a lexical block. */
8527 gen_lexical_block_die (stmt
, context_die
, depth
)
8529 register dw_die_ref context_die
;
8532 register dw_die_ref stmt_die
= new_die (DW_TAG_lexical_block
, context_die
);
8533 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8535 if (! BLOCK_ABSTRACT (stmt
))
8537 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_BEGIN_LABEL
,
8539 add_AT_lbl_id (stmt_die
, DW_AT_low_pc
, label
);
8540 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_END_LABEL
, next_block_number
);
8541 add_AT_lbl_id (stmt_die
, DW_AT_high_pc
, label
);
8544 push_decl_scope (stmt
);
8545 decls_for_scope (stmt
, stmt_die
, depth
);
8549 /* Generate a DIE for an inlined subprogram. */
8552 gen_inlined_subroutine_die (stmt
, context_die
, depth
)
8554 register dw_die_ref context_die
;
8557 if (! BLOCK_ABSTRACT (stmt
))
8559 register dw_die_ref subr_die
8560 = new_die (DW_TAG_inlined_subroutine
, context_die
);
8561 register tree decl
= block_ultimate_origin (stmt
);
8562 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
8564 add_abstract_origin_attribute (subr_die
, decl
);
8565 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_BEGIN_LABEL
,
8567 add_AT_lbl_id (subr_die
, DW_AT_low_pc
, label
);
8568 ASM_GENERATE_INTERNAL_LABEL (label
, BLOCK_END_LABEL
, next_block_number
);
8569 add_AT_lbl_id (subr_die
, DW_AT_high_pc
, label
);
8570 push_decl_scope (decl
);
8571 decls_for_scope (stmt
, subr_die
, depth
);
8573 current_function_has_inlines
= 1;
8577 /* Generate a DIE for a field in a record, or structure. */
8580 gen_field_die (decl
, context_die
)
8582 register dw_die_ref context_die
;
8584 register dw_die_ref decl_die
= new_die (DW_TAG_member
, context_die
);
8586 add_name_and_src_coords_attributes (decl_die
, decl
);
8587 add_type_attribute (decl_die
, member_declared_type (decl
),
8588 TREE_READONLY (decl
), TREE_THIS_VOLATILE (decl
),
8591 /* If this is a bit field... */
8592 if (DECL_BIT_FIELD_TYPE (decl
))
8594 add_byte_size_attribute (decl_die
, decl
);
8595 add_bit_size_attribute (decl_die
, decl
);
8596 add_bit_offset_attribute (decl_die
, decl
);
8599 if (TREE_CODE (DECL_FIELD_CONTEXT (decl
)) != UNION_TYPE
)
8600 add_data_member_location_attribute (decl_die
, decl
);
8602 if (DECL_ARTIFICIAL (decl
))
8603 add_AT_flag (decl_die
, DW_AT_artificial
, 1);
8605 if (TREE_PROTECTED (decl
))
8606 add_AT_unsigned (decl_die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8608 else if (TREE_PRIVATE (decl
))
8609 add_AT_unsigned (decl_die
, DW_AT_accessibility
, DW_ACCESS_private
);
8613 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8614 Use modified_type_die instead.
8615 We keep this code here just in case these types of DIEs may be needed to
8616 represent certain things in other languages (e.g. Pascal) someday. */
8618 gen_pointer_type_die (type
, context_die
)
8620 register dw_die_ref context_die
;
8622 register dw_die_ref ptr_die
8623 = new_die (DW_TAG_pointer_type
, scope_die_for (type
, context_die
));
8625 equate_type_number_to_die (type
, ptr_die
);
8626 add_type_attribute (ptr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8627 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
8630 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8631 Use modified_type_die instead.
8632 We keep this code here just in case these types of DIEs may be needed to
8633 represent certain things in other languages (e.g. Pascal) someday. */
8635 gen_reference_type_die (type
, context_die
)
8637 register dw_die_ref context_die
;
8639 register dw_die_ref ref_die
8640 = new_die (DW_TAG_reference_type
, scope_die_for (type
, context_die
));
8642 equate_type_number_to_die (type
, ref_die
);
8643 add_type_attribute (ref_die
, TREE_TYPE (type
), 0, 0, context_die
);
8644 add_AT_unsigned (mod_type_die
, DW_AT_byte_size
, PTR_SIZE
);
8648 /* Generate a DIE for a pointer to a member type. */
8650 gen_ptr_to_mbr_type_die (type
, context_die
)
8652 register dw_die_ref context_die
;
8654 register dw_die_ref ptr_die
8655 = new_die (DW_TAG_ptr_to_member_type
, scope_die_for (type
, context_die
));
8657 equate_type_number_to_die (type
, ptr_die
);
8658 add_AT_die_ref (ptr_die
, DW_AT_containing_type
,
8659 lookup_type_die (TYPE_OFFSET_BASETYPE (type
)));
8660 add_type_attribute (ptr_die
, TREE_TYPE (type
), 0, 0, context_die
);
8663 /* Generate the DIE for the compilation unit. */
8666 gen_compile_unit_die (main_input_filename
)
8667 register char *main_input_filename
;
8670 char *wd
= getpwd ();
8672 comp_unit_die
= new_die (DW_TAG_compile_unit
, NULL
);
8673 add_name_attribute (comp_unit_die
, main_input_filename
);
8676 add_AT_string (comp_unit_die
, DW_AT_comp_dir
, wd
);
8678 sprintf (producer
, "%s %s", language_string
, version_string
);
8680 #ifdef MIPS_DEBUGGING_INFO
8681 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
8682 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
8683 not appear in the producer string, the debugger reaches the conclusion
8684 that the object file is stripped and has no debugging information.
8685 To get the MIPS/SGI debugger to believe that there is debugging
8686 information in the object file, we add a -g to the producer string. */
8687 if (debug_info_level
> DINFO_LEVEL_TERSE
)
8688 strcat (producer
, " -g");
8691 add_AT_string (comp_unit_die
, DW_AT_producer
, producer
);
8693 if (strcmp (language_string
, "GNU C++") == 0)
8694 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C_plus_plus
);
8696 else if (strcmp (language_string
, "GNU Ada") == 0)
8697 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Ada83
);
8699 else if (strcmp (language_string
, "GNU F77") == 0)
8700 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Fortran77
);
8702 else if (strcmp (language_string
, "GNU Pascal") == 0)
8703 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_Pascal83
);
8705 else if (flag_traditional
)
8706 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C
);
8709 add_AT_unsigned (comp_unit_die
, DW_AT_language
, DW_LANG_C89
);
8711 #if 0 /* unimplemented */
8712 if (debug_info_level
>= DINFO_LEVEL_VERBOSE
)
8713 add_AT_unsigned (comp_unit_die
, DW_AT_macro_info
, 0);
8717 /* Generate a DIE for a string type. */
8720 gen_string_type_die (type
, context_die
)
8722 register dw_die_ref context_die
;
8724 register dw_die_ref type_die
8725 = new_die (DW_TAG_string_type
, scope_die_for (type
, context_die
));
8727 equate_type_number_to_die (type
, type_die
);
8729 /* Fudge the string length attribute for now. */
8731 /* TODO: add string length info.
8732 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
8733 bound_representation (upper_bound, 0, 'u'); */
8736 /* Generate the DIE for a base class. */
8739 gen_inheritance_die (binfo
, context_die
)
8740 register tree binfo
;
8741 register dw_die_ref context_die
;
8743 dw_die_ref die
= new_die (DW_TAG_inheritance
, context_die
);
8745 add_type_attribute (die
, BINFO_TYPE (binfo
), 0, 0, context_die
);
8746 add_data_member_location_attribute (die
, binfo
);
8748 if (TREE_VIA_VIRTUAL (binfo
))
8749 add_AT_unsigned (die
, DW_AT_virtuality
, DW_VIRTUALITY_virtual
);
8750 if (TREE_VIA_PUBLIC (binfo
))
8751 add_AT_unsigned (die
, DW_AT_accessibility
, DW_ACCESS_public
);
8752 else if (TREE_VIA_PROTECTED (binfo
))
8753 add_AT_unsigned (die
, DW_AT_accessibility
, DW_ACCESS_protected
);
8756 /* Generate a DIE for a class member. */
8759 gen_member_die (type
, context_die
)
8761 register dw_die_ref context_die
;
8763 register tree member
;
8765 /* If this is not an incomplete type, output descriptions of each of its
8766 members. Note that as we output the DIEs necessary to represent the
8767 members of this record or union type, we will also be trying to output
8768 DIEs to represent the *types* of those members. However the `type'
8769 function (above) will specifically avoid generating type DIEs for member
8770 types *within* the list of member DIEs for this (containing) type execpt
8771 for those types (of members) which are explicitly marked as also being
8772 members of this (containing) type themselves. The g++ front- end can
8773 force any given type to be treated as a member of some other
8774 (containing) type by setting the TYPE_CONTEXT of the given (member) type
8775 to point to the TREE node representing the appropriate (containing)
8778 /* First output info about the base classes. */
8779 if (TYPE_BINFO (type
) && TYPE_BINFO_BASETYPES (type
))
8781 register tree bases
= TYPE_BINFO_BASETYPES (type
);
8782 register int n_bases
= TREE_VEC_LENGTH (bases
);
8785 for (i
= 0; i
< n_bases
; i
++)
8786 gen_inheritance_die (TREE_VEC_ELT (bases
, i
), context_die
);
8789 /* Now output info about the data members and type members. */
8790 for (member
= TYPE_FIELDS (type
); member
; member
= TREE_CHAIN (member
))
8791 gen_decl_die (member
, context_die
);
8793 /* Now output info about the function members (if any). */
8794 for (member
= TYPE_METHODS (type
); member
; member
= TREE_CHAIN (member
))
8795 gen_decl_die (member
, context_die
);
8798 /* Generate a DIE for a structure or union type. */
8801 gen_struct_or_union_type_die (type
, context_die
)
8803 register dw_die_ref context_die
;
8805 register dw_die_ref type_die
= lookup_type_die (type
);
8806 register dw_die_ref scope_die
= 0;
8807 register int nested
= 0;
8809 if (type_die
&& ! TYPE_SIZE (type
))
8812 if (TYPE_CONTEXT (type
) != NULL_TREE
8813 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't')
8816 scope_die
= scope_die_for (type
, context_die
);
8818 if (! type_die
|| (nested
&& scope_die
== comp_unit_die
))
8819 /* First occurrence of type or toplevel definition of nested class. */
8821 register dw_die_ref old_die
= type_die
;
8823 type_die
= new_die (TREE_CODE (type
) == RECORD_TYPE
8824 ? DW_TAG_structure_type
: DW_TAG_union_type
,
8826 equate_type_number_to_die (type
, type_die
);
8827 add_name_attribute (type_die
, type_tag (type
));
8829 add_AT_die_ref (type_die
, DW_AT_specification
, old_die
);
8832 remove_AT (type_die
, DW_AT_declaration
);
8834 /* If we're not in the right context to be defining this type, defer to
8835 avoid tricky recursion. */
8836 if (TYPE_SIZE (type
) && decl_scope_depth
> 0 && scope_die
== comp_unit_die
)
8838 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8841 /* If this type has been completed, then give it a byte_size attribute and
8842 then give a list of members. */
8843 else if (TYPE_SIZE (type
))
8845 /* Prevent infinite recursion in cases where the type of some member of
8846 this type is expressed in terms of this type itself. */
8847 TREE_ASM_WRITTEN (type
) = 1;
8848 add_byte_size_attribute (type_die
, type
);
8849 if (TYPE_STUB_DECL (type
) != NULL_TREE
)
8850 add_src_coords_attributes (type_die
, TYPE_STUB_DECL (type
));
8852 /* If the first reference to this type was as the return type of an
8853 inline function, then it may not have a parent. Fix this now. */
8854 if (type_die
->die_parent
== NULL
)
8855 add_child_die (scope_die
, type_die
);
8857 push_decl_scope (type
);
8858 gen_member_die (type
, type_die
);
8861 /* GNU extension: Record what type our vtable lives in. */
8862 if (TYPE_VFIELD (type
))
8864 tree vtype
= DECL_FCONTEXT (TYPE_VFIELD (type
));
8866 gen_type_die (vtype
, context_die
);
8867 add_AT_die_ref (type_die
, DW_AT_containing_type
,
8868 lookup_type_die (vtype
));
8872 add_AT_flag (type_die
, DW_AT_declaration
, 1);
8875 /* Generate a DIE for a subroutine _type_. */
8878 gen_subroutine_type_die (type
, context_die
)
8880 register dw_die_ref context_die
;
8882 register tree return_type
= TREE_TYPE (type
);
8883 register dw_die_ref subr_die
8884 = new_die (DW_TAG_subroutine_type
, scope_die_for (type
, context_die
));
8886 equate_type_number_to_die (type
, subr_die
);
8887 add_prototyped_attribute (subr_die
, type
);
8888 add_type_attribute (subr_die
, return_type
, 0, 0, context_die
);
8889 gen_formal_types_die (type
, subr_die
);
8892 /* Generate a DIE for a type definition */
8895 gen_typedef_die (decl
, context_die
)
8897 register dw_die_ref context_die
;
8899 register dw_die_ref type_die
;
8900 register tree origin
;
8902 if (TREE_ASM_WRITTEN (decl
))
8904 TREE_ASM_WRITTEN (decl
) = 1;
8906 type_die
= new_die (DW_TAG_typedef
, scope_die_for (decl
, context_die
));
8907 origin
= decl_ultimate_origin (decl
);
8909 add_abstract_origin_attribute (type_die
, origin
);
8913 add_name_and_src_coords_attributes (type_die
, decl
);
8914 if (DECL_ORIGINAL_TYPE (decl
))
8916 type
= DECL_ORIGINAL_TYPE (decl
);
8917 equate_type_number_to_die (TREE_TYPE (decl
), type_die
);
8920 type
= TREE_TYPE (decl
);
8921 add_type_attribute (type_die
, type
, TREE_READONLY (decl
),
8922 TREE_THIS_VOLATILE (decl
), context_die
);
8925 if (DECL_ABSTRACT (decl
))
8926 equate_decl_number_to_die (decl
, type_die
);
8929 /* Generate a type description DIE. */
8932 gen_type_die (type
, context_die
)
8934 register dw_die_ref context_die
;
8936 if (type
== NULL_TREE
|| type
== error_mark_node
)
8939 /* We are going to output a DIE to represent the unqualified version of
8940 this type (i.e. without any const or volatile qualifiers) so get the
8941 main variant (i.e. the unqualified version) of this type now. */
8942 type
= type_main_variant (type
);
8944 if (TREE_ASM_WRITTEN (type
))
8947 if (TYPE_NAME (type
) && TREE_CODE (TYPE_NAME (type
)) == TYPE_DECL
8948 && DECL_ORIGINAL_TYPE (TYPE_NAME (type
)))
8950 TREE_ASM_WRITTEN (type
) = 1;
8951 gen_decl_die (TYPE_NAME (type
), context_die
);
8955 switch (TREE_CODE (type
))
8961 case REFERENCE_TYPE
:
8962 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
8963 ensures that the gen_type_die recursion will terminate even if the
8964 type is recursive. Recursive types are possible in Ada. */
8965 /* ??? We could perhaps do this for all types before the switch
8967 TREE_ASM_WRITTEN (type
) = 1;
8969 /* For these types, all that is required is that we output a DIE (or a
8970 set of DIEs) to represent the "basis" type. */
8971 gen_type_die (TREE_TYPE (type
), context_die
);
8975 /* This code is used for C++ pointer-to-data-member types.
8976 Output a description of the relevant class type. */
8977 gen_type_die (TYPE_OFFSET_BASETYPE (type
), context_die
);
8979 /* Output a description of the type of the object pointed to. */
8980 gen_type_die (TREE_TYPE (type
), context_die
);
8982 /* Now output a DIE to represent this pointer-to-data-member type
8984 gen_ptr_to_mbr_type_die (type
, context_die
);
8988 gen_type_die (TYPE_DOMAIN (type
), context_die
);
8989 gen_set_type_die (type
, context_die
);
8993 gen_type_die (TREE_TYPE (type
), context_die
);
8994 abort (); /* No way to represent these in Dwarf yet! */
8998 /* Force out return type (in case it wasn't forced out already). */
8999 gen_type_die (TREE_TYPE (type
), context_die
);
9000 gen_subroutine_type_die (type
, context_die
);
9004 /* Force out return type (in case it wasn't forced out already). */
9005 gen_type_die (TREE_TYPE (type
), context_die
);
9006 gen_subroutine_type_die (type
, context_die
);
9010 if (TYPE_STRING_FLAG (type
) && TREE_CODE (TREE_TYPE (type
)) == CHAR_TYPE
)
9012 gen_type_die (TREE_TYPE (type
), context_die
);
9013 gen_string_type_die (type
, context_die
);
9016 gen_array_type_die (type
, context_die
);
9022 case QUAL_UNION_TYPE
:
9023 /* If this is a nested type whose containing class hasn't been
9024 written out yet, writing it out will cover this one, too. */
9025 if (TYPE_CONTEXT (type
)
9026 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't'
9027 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9029 gen_type_die (TYPE_CONTEXT (type
), context_die
);
9031 if (TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9034 /* If that failed, attach ourselves to the stub. */
9035 push_decl_scope (TYPE_CONTEXT (type
));
9036 context_die
= lookup_type_die (TYPE_CONTEXT (type
));
9039 if (TREE_CODE (type
) == ENUMERAL_TYPE
)
9040 gen_enumeration_type_die (type
, context_die
);
9042 gen_struct_or_union_type_die (type
, context_die
);
9044 if (TYPE_CONTEXT (type
)
9045 && TREE_CODE_CLASS (TREE_CODE (TYPE_CONTEXT (type
))) == 't'
9046 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type
)))
9049 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9050 it up if it is ever completed. gen_*_type_die will set it for us
9051 when appropriate. */
9060 /* No DIEs needed for fundamental types. */
9064 /* No Dwarf representation currently defined. */
9071 TREE_ASM_WRITTEN (type
) = 1;
9074 /* Generate a DIE for a tagged type instantiation. */
9077 gen_tagged_type_instantiation_die (type
, context_die
)
9079 register dw_die_ref context_die
;
9081 if (type
== NULL_TREE
|| type
== error_mark_node
)
9084 /* We are going to output a DIE to represent the unqualified version of
9085 this type (i.e. without any const or volatile qualifiers) so make sure
9086 that we have the main variant (i.e. the unqualified version) of this
9088 if (type
!= type_main_variant (type
)
9089 || !TREE_ASM_WRITTEN (type
))
9092 switch (TREE_CODE (type
))
9098 gen_inlined_enumeration_type_die (type
, context_die
);
9102 gen_inlined_structure_type_die (type
, context_die
);
9106 case QUAL_UNION_TYPE
:
9107 gen_inlined_union_type_die (type
, context_die
);
9115 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9116 things which are local to the given block. */
9119 gen_block_die (stmt
, context_die
, depth
)
9121 register dw_die_ref context_die
;
9124 register int must_output_die
= 0;
9125 register tree origin
;
9127 register enum tree_code origin_code
;
9129 /* Ignore blocks never really used to make RTL. */
9131 if (stmt
== NULL_TREE
|| !TREE_USED (stmt
))
9134 /* Determine the "ultimate origin" of this block. This block may be an
9135 inlined instance of an inlined instance of inline function, so we have
9136 to trace all of the way back through the origin chain to find out what
9137 sort of node actually served as the original seed for the creation of
9138 the current block. */
9139 origin
= block_ultimate_origin (stmt
);
9140 origin_code
= (origin
!= NULL
) ? TREE_CODE (origin
) : ERROR_MARK
;
9142 /* Determine if we need to output any Dwarf DIEs at all to represent this
9144 if (origin_code
== FUNCTION_DECL
)
9145 /* The outer scopes for inlinings *must* always be represented. We
9146 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9147 must_output_die
= 1;
9150 /* In the case where the current block represents an inlining of the
9151 "body block" of an inline function, we must *NOT* output any DIE for
9152 this block because we have already output a DIE to represent the
9153 whole inlined function scope and the "body block" of any function
9154 doesn't really represent a different scope according to ANSI C
9155 rules. So we check here to make sure that this block does not
9156 represent a "body block inlining" before trying to set the
9157 `must_output_die' flag. */
9158 if (! is_body_block (origin
? origin
: stmt
))
9160 /* Determine if this block directly contains any "significant"
9161 local declarations which we will need to output DIEs for. */
9162 if (debug_info_level
> DINFO_LEVEL_TERSE
)
9163 /* We are not in terse mode so *any* local declaration counts
9164 as being a "significant" one. */
9165 must_output_die
= (BLOCK_VARS (stmt
) != NULL
);
9167 /* We are in terse mode, so only local (nested) function
9168 definitions count as "significant" local declarations. */
9169 for (decl
= BLOCK_VARS (stmt
);
9170 decl
!= NULL
; decl
= TREE_CHAIN (decl
))
9171 if (TREE_CODE (decl
) == FUNCTION_DECL
9172 && DECL_INITIAL (decl
))
9174 must_output_die
= 1;
9180 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9181 DIE for any block which contains no significant local declarations at
9182 all. Rather, in such cases we just call `decls_for_scope' so that any
9183 needed Dwarf info for any sub-blocks will get properly generated. Note
9184 that in terse mode, our definition of what constitutes a "significant"
9185 local declaration gets restricted to include only inlined function
9186 instances and local (nested) function definitions. */
9187 if (must_output_die
)
9189 if (origin_code
== FUNCTION_DECL
)
9190 gen_inlined_subroutine_die (stmt
, context_die
, depth
);
9192 gen_lexical_block_die (stmt
, context_die
, depth
);
9195 decls_for_scope (stmt
, context_die
, depth
);
9198 /* Generate all of the decls declared within a given scope and (recursively)
9199 all of its sub-blocks. */
9202 decls_for_scope (stmt
, context_die
, depth
)
9204 register dw_die_ref context_die
;
9208 register tree subblocks
;
9210 /* Ignore blocks never really used to make RTL. */
9211 if (stmt
== NULL_TREE
|| ! TREE_USED (stmt
))
9214 if (!BLOCK_ABSTRACT (stmt
) && depth
> 0)
9215 next_block_number
++;
9217 /* Output the DIEs to represent all of the data objects and typedefs
9218 declared directly within this block but not within any nested
9219 sub-blocks. Also, nested function and tag DIEs have been
9220 generated with a parent of NULL; fix that up now. */
9221 for (decl
= BLOCK_VARS (stmt
);
9222 decl
!= NULL
; decl
= TREE_CHAIN (decl
))
9224 register dw_die_ref die
;
9226 if (TREE_CODE (decl
) == FUNCTION_DECL
)
9227 die
= lookup_decl_die (decl
);
9228 else if (TREE_CODE (decl
) == TYPE_DECL
&& TYPE_DECL_IS_STUB (decl
))
9229 die
= lookup_type_die (TREE_TYPE (decl
));
9233 if (die
!= NULL
&& die
->die_parent
== NULL
)
9234 add_child_die (context_die
, die
);
9236 gen_decl_die (decl
, context_die
);
9239 /* Output the DIEs to represent all sub-blocks (and the items declared
9240 therein) of this block. */
9241 for (subblocks
= BLOCK_SUBBLOCKS (stmt
);
9243 subblocks
= BLOCK_CHAIN (subblocks
))
9244 gen_block_die (subblocks
, context_die
, depth
+ 1);
9247 /* Is this a typedef we can avoid emitting? */
9250 is_redundant_typedef (decl
)
9253 if (TYPE_DECL_IS_STUB (decl
))
9256 if (DECL_ARTIFICIAL (decl
)
9257 && DECL_CONTEXT (decl
)
9258 && is_tagged_type (DECL_CONTEXT (decl
))
9259 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl
))) == TYPE_DECL
9260 && DECL_NAME (decl
) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl
))))
9261 /* Also ignore the artificial member typedef for the class name. */
9267 /* Generate Dwarf debug information for a decl described by DECL. */
9270 gen_decl_die (decl
, context_die
)
9272 register dw_die_ref context_die
;
9274 register tree origin
;
9276 /* Make a note of the decl node we are going to be working on. We may need
9277 to give the user the source coordinates of where it appeared in case we
9278 notice (later on) that something about it looks screwy. */
9279 dwarf_last_decl
= decl
;
9281 if (TREE_CODE (decl
) == ERROR_MARK
)
9284 /* If this ..._DECL node is marked to be ignored, then ignore it. But don't
9285 ignore a function definition, since that would screw up our count of
9286 blocks, and that in turn will completely screw up the labels we will
9287 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9288 subsequent blocks). */
9289 if (DECL_IGNORED_P (decl
) && TREE_CODE (decl
) != FUNCTION_DECL
)
9292 switch (TREE_CODE (decl
))
9295 /* The individual enumerators of an enum type get output when we output
9296 the Dwarf representation of the relevant enum type itself. */
9300 /* Don't output any DIEs to represent mere function declarations,
9301 unless they are class members or explicit block externs. */
9302 if (DECL_INITIAL (decl
) == NULL_TREE
&& DECL_CONTEXT (decl
) == NULL_TREE
9303 && (current_function_decl
== NULL_TREE
|| ! DECL_ARTIFICIAL (decl
)))
9306 if (debug_info_level
> DINFO_LEVEL_TERSE
)
9308 /* Before we describe the FUNCTION_DECL itself, make sure that we
9309 have described its return type. */
9310 gen_type_die (TREE_TYPE (TREE_TYPE (decl
)), context_die
);
9312 /* And its containing type. */
9313 origin
= decl_class_context (decl
);
9314 if (origin
!= NULL_TREE
)
9315 gen_type_die (origin
, context_die
);
9317 /* And its virtual context. */
9318 if (DECL_VINDEX (decl
) != NULL_TREE
)
9319 gen_type_die (DECL_CONTEXT (decl
), context_die
);
9322 /* Now output a DIE to represent the function itself. */
9323 gen_subprogram_die (decl
, context_die
);
9327 /* If we are in terse mode, don't generate any DIEs to represent any
9329 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9332 /* In the special case of a TYPE_DECL node representing the
9333 declaration of some type tag, if the given TYPE_DECL is marked as
9334 having been instantiated from some other (original) TYPE_DECL node
9335 (e.g. one which was generated within the original definition of an
9336 inline function) we have to generate a special (abbreviated)
9337 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9339 if (TYPE_DECL_IS_STUB (decl
) && DECL_ABSTRACT_ORIGIN (decl
) != NULL_TREE
)
9341 gen_tagged_type_instantiation_die (TREE_TYPE (decl
), context_die
);
9345 if (is_redundant_typedef (decl
))
9346 gen_type_die (TREE_TYPE (decl
), context_die
);
9348 /* Output a DIE to represent the typedef itself. */
9349 gen_typedef_die (decl
, context_die
);
9353 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9354 gen_label_die (decl
, context_die
);
9358 /* If we are in terse mode, don't generate any DIEs to represent any
9359 variable declarations or definitions. */
9360 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9363 /* Output any DIEs that are needed to specify the type of this data
9365 gen_type_die (TREE_TYPE (decl
), context_die
);
9367 /* And its containing type. */
9368 origin
= decl_class_context (decl
);
9369 if (origin
!= NULL_TREE
)
9370 gen_type_die (origin
, context_die
);
9372 /* Now output the DIE to represent the data object itself. This gets
9373 complicated because of the possibility that the VAR_DECL really
9374 represents an inlined instance of a formal parameter for an inline
9376 origin
= decl_ultimate_origin (decl
);
9377 if (origin
!= NULL_TREE
&& TREE_CODE (origin
) == PARM_DECL
)
9378 gen_formal_parameter_die (decl
, context_die
);
9380 gen_variable_die (decl
, context_die
);
9384 /* Ignore the nameless fields that are used to skip bits, but
9385 handle C++ anonymous unions. */
9386 if (DECL_NAME (decl
) != NULL_TREE
9387 || TREE_CODE (TREE_TYPE (decl
)) == UNION_TYPE
)
9389 gen_type_die (member_declared_type (decl
), context_die
);
9390 gen_field_die (decl
, context_die
);
9395 gen_type_die (TREE_TYPE (decl
), context_die
);
9396 gen_formal_parameter_die (decl
, context_die
);
9404 /* Write the debugging output for DECL. */
9407 dwarf2out_decl (decl
)
9410 register dw_die_ref context_die
= comp_unit_die
;
9412 if (TREE_CODE (decl
) == ERROR_MARK
)
9415 /* If this ..._DECL node is marked to be ignored, then ignore it. We gotta
9416 hope that the node in question doesn't represent a function definition.
9417 If it does, then totally ignoring it is bound to screw up our count of
9418 blocks, and that in turn will completely screw up the labels we will
9419 reference in subsequent DW_AT_low_pc and DW_AT_high_pc attributes (for
9420 subsequent blocks). (It's too bad that BLOCK nodes don't carry their
9421 own sequence numbers with them!) */
9422 if (DECL_IGNORED_P (decl
))
9424 if (TREE_CODE (decl
) == FUNCTION_DECL
9425 && DECL_INITIAL (decl
) != NULL
)
9431 switch (TREE_CODE (decl
))
9434 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9435 builtin function. Explicit programmer-supplied declarations of
9436 these same functions should NOT be ignored however. */
9437 if (DECL_EXTERNAL (decl
) && DECL_FUNCTION_CODE (decl
))
9440 /* What we would really like to do here is to filter out all mere
9441 file-scope declarations of file-scope functions which are never
9442 referenced later within this translation unit (and keep all of ones
9443 that *are* referenced later on) but we aren't clairvoyant, so we have
9444 no idea which functions will be referenced in the future (i.e. later
9445 on within the current translation unit). So here we just ignore all
9446 file-scope function declarations which are not also definitions. If
9447 and when the debugger needs to know something about these functions,
9448 it wil have to hunt around and find the DWARF information associated
9449 with the definition of the function. Note that we can't just check
9450 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9451 definitions and which ones represent mere declarations. We have to
9452 check `DECL_INITIAL' instead. That's because the C front-end
9453 supports some weird semantics for "extern inline" function
9454 definitions. These can get inlined within the current translation
9455 unit (an thus, we need to generate DWARF info for their abstract
9456 instances so that the DWARF info for the concrete inlined instances
9457 can have something to refer to) but the compiler never generates any
9458 out-of-lines instances of such things (despite the fact that they
9459 *are* definitions). The important point is that the C front-end
9460 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9461 to generate DWARF for them anyway. Note that the C++ front-end also
9462 plays some similar games for inline function definitions appearing
9463 within include files which also contain
9464 `#pragma interface' pragmas. */
9465 if (DECL_INITIAL (decl
) == NULL_TREE
)
9468 /* If we're a nested function, initially use a parent of NULL; if we're
9469 a plain function, this will be fixed up in decls_for_scope. If
9470 we're a method, it will be ignored, since we already have a DIE. */
9471 if (decl_function_context (decl
))
9477 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9478 declaration and if the declaration was never even referenced from
9479 within this entire compilation unit. We suppress these DIEs in
9480 order to save space in the .debug section (by eliminating entries
9481 which are probably useless). Note that we must not suppress
9482 block-local extern declarations (whether used or not) because that
9483 would screw-up the debugger's name lookup mechanism and cause it to
9484 miss things which really ought to be in scope at a given point. */
9485 if (DECL_EXTERNAL (decl
) && !TREE_USED (decl
))
9488 /* If we are in terse mode, don't generate any DIEs to represent any
9489 variable declarations or definitions. */
9490 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9495 /* Don't bother trying to generate any DIEs to represent any of the
9496 normal built-in types for the language we are compiling. */
9497 if (DECL_SOURCE_LINE (decl
) == 0)
9499 /* OK, we need to generate one for `bool' so GDB knows what type
9500 comparisons have. */
9501 if ((get_AT_unsigned (comp_unit_die
, DW_AT_language
)
9502 == DW_LANG_C_plus_plus
)
9503 && TREE_CODE (TREE_TYPE (decl
)) == BOOLEAN_TYPE
)
9504 modified_type_die (TREE_TYPE (decl
), 0, 0, NULL
);
9509 /* If we are in terse mode, don't generate any DIEs for types. */
9510 if (debug_info_level
<= DINFO_LEVEL_TERSE
)
9513 /* If we're a function-scope tag, initially use a parent of NULL;
9514 this will be fixed up in decls_for_scope. */
9515 if (decl_function_context (decl
))
9524 gen_decl_die (decl
, context_die
);
9525 output_pending_types_for_scope (comp_unit_die
);
9528 /* Output a marker (i.e. a label) for the beginning of the generated code for
9532 dwarf2out_begin_block (blocknum
)
9533 register unsigned blocknum
;
9535 function_section (current_function_decl
);
9536 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BLOCK_BEGIN_LABEL
, blocknum
);
9539 /* Output a marker (i.e. a label) for the end of the generated code for a
9543 dwarf2out_end_block (blocknum
)
9544 register unsigned blocknum
;
9546 function_section (current_function_decl
);
9547 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BLOCK_END_LABEL
, blocknum
);
9550 /* Output a marker (i.e. a label) at a point in the assembly code which
9551 corresponds to a given source level label. */
9554 dwarf2out_label (insn
)
9557 char label
[MAX_ARTIFICIAL_LABEL_BYTES
];
9559 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9561 function_section (current_function_decl
);
9562 sprintf (label
, INSN_LABEL_FMT
, current_funcdef_number
);
9563 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, label
,
9564 (unsigned) INSN_UID (insn
));
9568 /* Lookup a filename (in the list of filenames that we know about here in
9569 dwarf2out.c) and return its "index". The index of each (known) filename is
9570 just a unique number which is associated with only that one filename.
9571 We need such numbers for the sake of generating labels
9572 (in the .debug_sfnames section) and references to those
9573 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9574 If the filename given as an argument is not found in our current list,
9575 add it to the list and assign it the next available unique index number.
9576 In order to speed up searches, we remember the index of the filename
9577 was looked up last. This handles the majority of all searches. */
9580 lookup_filename (file_name
)
9583 static unsigned last_file_lookup_index
= 0;
9584 register unsigned i
;
9586 /* Check to see if the file name that was searched on the previous call
9587 matches this file name. If so, return the index. */
9588 if (last_file_lookup_index
!= 0)
9589 if (strcmp (file_name
, file_table
[last_file_lookup_index
]) == 0)
9590 return last_file_lookup_index
;
9592 /* Didn't match the previous lookup, search the table */
9593 for (i
= 1; i
< file_table_in_use
; ++i
)
9594 if (strcmp (file_name
, file_table
[i
]) == 0)
9596 last_file_lookup_index
= i
;
9600 /* Prepare to add a new table entry by making sure there is enough space in
9601 the table to do so. If not, expand the current table. */
9602 if (file_table_in_use
== file_table_allocated
)
9604 file_table_allocated
+= FILE_TABLE_INCREMENT
;
9606 = (char **) xrealloc (file_table
,
9607 file_table_allocated
* sizeof (char *));
9610 /* Add the new entry to the end of the filename table. */
9611 file_table
[file_table_in_use
] = xstrdup (file_name
);
9612 last_file_lookup_index
= file_table_in_use
++;
9614 return last_file_lookup_index
;
9617 /* Output a label to mark the beginning of a source code line entry
9618 and record information relating to this source line, in
9619 'line_info_table' for later output of the .debug_line section. */
9622 dwarf2out_line (filename
, line
)
9623 register char *filename
;
9624 register unsigned line
;
9626 if (debug_info_level
>= DINFO_LEVEL_NORMAL
)
9628 function_section (current_function_decl
);
9630 if (DECL_SECTION_NAME (current_function_decl
))
9632 register dw_separate_line_info_ref line_info
;
9633 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, SEPARATE_LINE_CODE_LABEL
,
9634 separate_line_info_table_in_use
);
9635 fputc ('\n', asm_out_file
);
9637 /* expand the line info table if necessary */
9638 if (separate_line_info_table_in_use
9639 == separate_line_info_table_allocated
)
9641 separate_line_info_table_allocated
+= LINE_INFO_TABLE_INCREMENT
;
9642 separate_line_info_table
9643 = (dw_separate_line_info_ref
)
9644 xrealloc (separate_line_info_table
,
9645 separate_line_info_table_allocated
9646 * sizeof (dw_separate_line_info_entry
));
9649 /* Add the new entry at the end of the line_info_table. */
9651 = &separate_line_info_table
[separate_line_info_table_in_use
++];
9652 line_info
->dw_file_num
= lookup_filename (filename
);
9653 line_info
->dw_line_num
= line
;
9654 line_info
->function
= current_funcdef_number
;
9658 register dw_line_info_ref line_info
;
9660 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, LINE_CODE_LABEL
,
9661 line_info_table_in_use
);
9662 fputc ('\n', asm_out_file
);
9664 /* Expand the line info table if necessary. */
9665 if (line_info_table_in_use
== line_info_table_allocated
)
9667 line_info_table_allocated
+= LINE_INFO_TABLE_INCREMENT
;
9669 = (dw_line_info_ref
)
9670 xrealloc (line_info_table
,
9671 (line_info_table_allocated
9672 * sizeof (dw_line_info_entry
)));
9675 /* Add the new entry at the end of the line_info_table. */
9676 line_info
= &line_info_table
[line_info_table_in_use
++];
9677 line_info
->dw_file_num
= lookup_filename (filename
);
9678 line_info
->dw_line_num
= line
;
9683 /* Record the beginning of a new source file, for later output
9684 of the .debug_macinfo section. At present, unimplemented. */
9687 dwarf2out_start_source_file (filename
)
9688 register char *filename ATTRIBUTE_UNUSED
;
9692 /* Record the end of a source file, for later output
9693 of the .debug_macinfo section. At present, unimplemented. */
9696 dwarf2out_end_source_file ()
9700 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9701 the tail part of the directive line, i.e. the part which is past the
9702 initial whitespace, #, whitespace, directive-name, whitespace part. */
9705 dwarf2out_define (lineno
, buffer
)
9706 register unsigned lineno
;
9707 register char *buffer
;
9709 static int initialized
= 0;
9712 dwarf2out_start_source_file (primary_filename
);
9717 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
9718 the tail part of the directive line, i.e. the part which is past the
9719 initial whitespace, #, whitespace, directive-name, whitespace part. */
9722 dwarf2out_undef (lineno
, buffer
)
9723 register unsigned lineno ATTRIBUTE_UNUSED
;
9724 register char *buffer ATTRIBUTE_UNUSED
;
9728 /* Set up for Dwarf output at the start of compilation. */
9731 dwarf2out_init (asm_out_file
, main_input_filename
)
9732 register FILE *asm_out_file
;
9733 register char *main_input_filename
;
9735 /* Remember the name of the primary input file. */
9736 primary_filename
= main_input_filename
;
9738 /* Allocate the initial hunk of the file_table. */
9739 file_table
= (char **) xmalloc (FILE_TABLE_INCREMENT
* sizeof (char *));
9740 bzero ((char *) file_table
, FILE_TABLE_INCREMENT
* sizeof (char *));
9741 file_table_allocated
= FILE_TABLE_INCREMENT
;
9743 /* Skip the first entry - file numbers begin at 1. */
9744 file_table_in_use
= 1;
9746 /* Allocate the initial hunk of the decl_die_table. */
9748 = (dw_die_ref
*) xmalloc (DECL_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9749 bzero ((char *) decl_die_table
,
9750 DECL_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9751 decl_die_table_allocated
= DECL_DIE_TABLE_INCREMENT
;
9752 decl_die_table_in_use
= 0;
9754 /* Allocate the initial hunk of the decl_scope_table. */
9756 = (decl_scope_node
*) xmalloc (DECL_SCOPE_TABLE_INCREMENT
9757 * sizeof (decl_scope_node
));
9758 bzero ((char *) decl_scope_table
,
9759 DECL_SCOPE_TABLE_INCREMENT
* sizeof (decl_scope_node
));
9760 decl_scope_table_allocated
= DECL_SCOPE_TABLE_INCREMENT
;
9761 decl_scope_depth
= 0;
9763 /* Allocate the initial hunk of the abbrev_die_table. */
9765 = (dw_die_ref
*) xmalloc (ABBREV_DIE_TABLE_INCREMENT
9766 * sizeof (dw_die_ref
));
9767 bzero ((char *) abbrev_die_table
,
9768 ABBREV_DIE_TABLE_INCREMENT
* sizeof (dw_die_ref
));
9769 abbrev_die_table_allocated
= ABBREV_DIE_TABLE_INCREMENT
;
9770 /* Zero-th entry is allocated, but unused */
9771 abbrev_die_table_in_use
= 1;
9773 /* Allocate the initial hunk of the line_info_table. */
9775 = (dw_line_info_ref
) xmalloc (LINE_INFO_TABLE_INCREMENT
9776 * sizeof (dw_line_info_entry
));
9777 bzero ((char *) line_info_table
,
9778 LINE_INFO_TABLE_INCREMENT
* sizeof (dw_line_info_entry
));
9779 line_info_table_allocated
= LINE_INFO_TABLE_INCREMENT
;
9780 /* Zero-th entry is allocated, but unused */
9781 line_info_table_in_use
= 1;
9783 /* Generate the initial DIE for the .debug section. Note that the (string)
9784 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
9785 will (typically) be a relative pathname and that this pathname should be
9786 taken as being relative to the directory from which the compiler was
9787 invoked when the given (base) source file was compiled. */
9788 gen_compile_unit_die (main_input_filename
);
9790 ASM_GENERATE_INTERNAL_LABEL (text_end_label
, TEXT_END_LABEL
, 0);
9793 /* Output stuff that dwarf requires at the end of every file,
9794 and generate the DWARF-2 debugging info. */
9799 limbo_die_node
*node
, *next_node
;
9803 /* Traverse the limbo die list, and add parent/child links. The only
9804 dies without parents that should be here are concrete instances of
9805 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
9806 For concrete instances, we can get the parent die from the abstract
9808 for (node
= limbo_die_list
; node
; node
= next_node
)
9810 next_node
= node
->next
;
9813 if (die
->die_parent
== NULL
)
9815 a
= get_AT (die
, DW_AT_abstract_origin
);
9817 add_child_die (a
->dw_attr_val
.v
.val_die_ref
->die_parent
, die
);
9818 else if (die
== comp_unit_die
)
9826 /* Traverse the DIE tree and add sibling attributes to those DIE's
9827 that have children. */
9828 add_sibling_attributes (comp_unit_die
);
9830 /* Output a terminator label for the .text section. */
9831 fputc ('\n', asm_out_file
);
9832 ASM_OUTPUT_SECTION (asm_out_file
, TEXT_SECTION
);
9833 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, TEXT_END_LABEL
, 0);
9836 /* Output a terminator label for the .data section. */
9837 fputc ('\n', asm_out_file
);
9838 ASM_OUTPUT_SECTION (asm_out_file
, DATA_SECTION
);
9839 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, DATA_END_LABEL
, 0);
9841 /* Output a terminator label for the .bss section. */
9842 fputc ('\n', asm_out_file
);
9843 ASM_OUTPUT_SECTION (asm_out_file
, BSS_SECTION
);
9844 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file
, BSS_END_LABEL
, 0);
9847 /* Output the source line correspondence table. */
9848 if (line_info_table_in_use
> 1 || separate_line_info_table_in_use
)
9850 fputc ('\n', asm_out_file
);
9851 ASM_OUTPUT_SECTION (asm_out_file
, DEBUG_LINE_SECTION
);
9852 output_line_info ();
9854 /* We can only use the low/high_pc attributes if all of the code
9856 if (separate_line_info_table_in_use
== 0)
9858 add_AT_lbl_id (comp_unit_die
, DW_AT_low_pc
,
9859 stripattributes (TEXT_SECTION
));
9860 add_AT_lbl_id (comp_unit_die
, DW_AT_high_pc
, text_end_label
);
9863 add_AT_section_offset (comp_unit_die
, DW_AT_stmt_list
, DEBUG_LINE_SECTION
);
9866 /* Output the abbreviation table. */
9867 fputc ('\n', asm_out_file
);
9868 ASM_OUTPUT_SECTION (asm_out_file
, ABBREV_SECTION
);
9869 build_abbrev_table (comp_unit_die
);
9870 output_abbrev_section ();
9872 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
9873 next_die_offset
= DWARF_COMPILE_UNIT_HEADER_SIZE
;
9874 calc_die_sizes (comp_unit_die
);
9876 /* Output debugging information. */
9877 fputc ('\n', asm_out_file
);
9878 ASM_OUTPUT_SECTION (asm_out_file
, DEBUG_INFO_SECTION
);
9879 output_compilation_unit_header ();
9880 output_die (comp_unit_die
);
9882 if (pubname_table_in_use
)
9884 /* Output public names table. */
9885 fputc ('\n', asm_out_file
);
9886 ASM_OUTPUT_SECTION (asm_out_file
, PUBNAMES_SECTION
);
9890 if (fde_table_in_use
)
9892 /* Output the address range information. */
9893 fputc ('\n', asm_out_file
);
9894 ASM_OUTPUT_SECTION (asm_out_file
, ARANGES_SECTION
);
9898 #endif /* DWARF2_DEBUGGING_INFO */