1 /* Output Dwarf2 format symbol table information from the GNU C compiler.
2 Copyright (C) 1992, 1993, 1995, 1996, 1997, 1998, 1999, 2000
3 Free Software Foundation, Inc.
4 Contributed by Gary Funck (gary@intrepid.com).
5 Derived from DWARF 1 implementation of Ron Guilmette (rfg@monkeys.com).
6 Extensively modified by Jason Merrill (jason@cygnus.com).
8 This file is part of GNU CC.
10 GNU CC is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 GNU CC is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GNU CC; see the file COPYING. If not, write to
22 the Free Software Foundation, 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
25 /* TODO: Implement .debug_str handling, and share entries somehow.
26 Eliminate duplicates by putting common info in a separate section
27 to be collected by the linker and referring to it with
29 Emit .debug_line header even when there are no functions, since
30 the file numbers are used by .debug_info. Alternately, leave
31 out locations for types and decls.
32 Avoid talking about ctors and op= for PODs.
33 Factor out common prologue sequences into multiple CIEs. */
35 /* The first part of this file deals with the DWARF 2 frame unwind
36 information, which is also used by the GCC efficient exception handling
37 mechanism. The second part, controlled only by an #ifdef
38 DWARF2_DEBUGGING_INFO, deals with the other DWARF 2 debugging
47 #include "hard-reg-set.h"
49 #include "insn-config.h"
55 #include "dwarf2out.h"
61 /* Decide whether we want to emit frame unwind information for the current
67 return (write_symbols == DWARF2_DEBUG
68 #ifdef DWARF2_FRAME_INFO
71 #ifdef DWARF2_UNWIND_INFO
73 || (flag_exceptions && ! exceptions_via_longjmp)
78 #if defined (DWARF2_DEBUGGING_INFO) || defined (DWARF2_UNWIND_INFO)
80 /* How to start an assembler comment. */
81 #ifndef ASM_COMMENT_START
82 #define ASM_COMMENT_START ";#"
85 typedef struct dw_cfi_struct *dw_cfi_ref;
86 typedef struct dw_fde_struct *dw_fde_ref;
87 typedef union dw_cfi_oprnd_struct *dw_cfi_oprnd_ref;
89 /* Call frames are described using a sequence of Call Frame
90 Information instructions. The register number, offset
91 and address fields are provided as possible operands;
92 their use is selected by the opcode field. */
94 typedef union dw_cfi_oprnd_struct
96 unsigned long dw_cfi_reg_num;
97 long int dw_cfi_offset;
98 const char *dw_cfi_addr;
99 struct dw_loc_descr_struct *dw_cfi_loc;
103 typedef struct dw_cfi_struct
105 dw_cfi_ref dw_cfi_next;
106 enum dwarf_call_frame_info dw_cfi_opc;
107 dw_cfi_oprnd dw_cfi_oprnd1;
108 dw_cfi_oprnd dw_cfi_oprnd2;
112 /* This is how we define the location of the CFA. We use to handle it
113 as REG + OFFSET all the time, but now it can be more complex.
114 It can now be either REG + CFA_OFFSET or *(REG + BASE_OFFSET) + CFA_OFFSET.
115 Instead of passing around REG and OFFSET, we pass a copy
116 of this structure. */
117 typedef struct cfa_loc
122 int indirect; /* 1 if CFA is accessed via a dereference. */
125 /* All call frame descriptions (FDE's) in the GCC generated DWARF
126 refer to a single Common Information Entry (CIE), defined at
127 the beginning of the .debug_frame section. This used of a single
128 CIE obviates the need to keep track of multiple CIE's
129 in the DWARF generation routines below. */
131 typedef struct dw_fde_struct
133 const char *dw_fde_begin;
134 const char *dw_fde_current_label;
135 const char *dw_fde_end;
136 dw_cfi_ref dw_fde_cfi;
141 /* Maximum size (in bytes) of an artificially generated label. */
142 #define MAX_ARTIFICIAL_LABEL_BYTES 30
144 /* Make sure we know the sizes of the various types dwarf can describe. These
145 are only defaults. If the sizes are different for your target, you should
146 override these values by defining the appropriate symbols in your tm.h
149 #ifndef CHAR_TYPE_SIZE
150 #define CHAR_TYPE_SIZE BITS_PER_UNIT
153 /* The size of the target's pointer type. */
155 #define PTR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
158 /* The size of addresses as they appear in the Dwarf 2 data.
159 Some architectures use word addresses to refer to code locations,
160 but Dwarf 2 info always uses byte addresses. On such machines,
161 Dwarf 2 addresses need to be larger than the architecture's
163 #ifndef DWARF2_ADDR_SIZE
164 #define DWARF2_ADDR_SIZE (POINTER_SIZE / BITS_PER_UNIT)
167 /* The size in bytes of a DWARF field indicating an offset or length
168 relative to a debug info section, specified to be 4 bytes in the
169 DWARF-2 specification. The SGI/MIPS ABI defines it to be the same
172 #ifndef DWARF_OFFSET_SIZE
173 #define DWARF_OFFSET_SIZE 4
176 #define DWARF_VERSION 2
178 /* Round SIZE up to the nearest BOUNDARY. */
179 #define DWARF_ROUND(SIZE,BOUNDARY) \
180 ((((SIZE) + (BOUNDARY) - 1) / (BOUNDARY)) * (BOUNDARY))
182 /* Offsets recorded in opcodes are a multiple of this alignment factor. */
183 #ifdef STACK_GROWS_DOWNWARD
184 #define DWARF_CIE_DATA_ALIGNMENT (-((int) UNITS_PER_WORD))
186 #define DWARF_CIE_DATA_ALIGNMENT ((int) UNITS_PER_WORD)
189 /* A pointer to the base of a table that contains frame description
190 information for each routine. */
191 static dw_fde_ref fde_table;
193 /* Number of elements currently allocated for fde_table. */
194 static unsigned fde_table_allocated;
196 /* Number of elements in fde_table currently in use. */
197 static unsigned fde_table_in_use;
199 /* Size (in elements) of increments by which we may expand the
201 #define FDE_TABLE_INCREMENT 256
203 /* A list of call frame insns for the CIE. */
204 static dw_cfi_ref cie_cfi_head;
206 /* The number of the current function definition for which debugging
207 information is being generated. These numbers range from 1 up to the
208 maximum number of function definitions contained within the current
209 compilation unit. These numbers are used to create unique label id's
210 unique to each function definition. */
211 static unsigned current_funcdef_number = 0;
213 /* Some DWARF extensions (e.g., MIPS/SGI) implement a subprogram
214 attribute that accelerates the lookup of the FDE associated
215 with the subprogram. This variable holds the table index of the FDE
216 associated with the current function (body) definition. */
217 static unsigned current_funcdef_fde;
219 /* Forward declarations for functions defined in this file. */
221 static char *stripattributes PARAMS ((const char *));
222 static const char *dwarf_cfi_name PARAMS ((unsigned));
223 static dw_cfi_ref new_cfi PARAMS ((void));
224 static void add_cfi PARAMS ((dw_cfi_ref *, dw_cfi_ref));
225 static unsigned long size_of_uleb128 PARAMS ((unsigned long));
226 static unsigned long size_of_sleb128 PARAMS ((long));
227 static void output_uleb128 PARAMS ((unsigned long));
228 static void output_sleb128 PARAMS ((long));
229 static void add_fde_cfi PARAMS ((const char *, dw_cfi_ref));
230 static void lookup_cfa_1 PARAMS ((dw_cfi_ref, dw_cfa_location *));
231 static void lookup_cfa PARAMS ((dw_cfa_location *));
232 static void reg_save PARAMS ((const char *, unsigned,
234 static void initial_return_save PARAMS ((rtx));
235 static void output_cfi PARAMS ((dw_cfi_ref, dw_fde_ref));
236 static void output_call_frame_info PARAMS ((int));
237 static void dwarf2out_stack_adjust PARAMS ((rtx));
238 static void dwarf2out_frame_debug_expr PARAMS ((rtx, const char *));
240 /* Support for complex CFA locations. */
241 static void output_cfa_loc PARAMS ((dw_cfi_ref));
242 static void get_cfa_from_loc_descr PARAMS ((dw_cfa_location *,
243 struct dw_loc_descr_struct *));
244 static struct dw_loc_descr_struct *build_cfa_loc
245 PARAMS ((dw_cfa_location *));
246 static void def_cfa_1 PARAMS ((const char *, dw_cfa_location *));
248 /* Definitions of defaults for assembler-dependent names of various
249 pseudo-ops and section names.
250 Theses may be overridden in the tm.h file (if necessary) for a particular
253 #ifdef OBJECT_FORMAT_ELF
254 #ifndef UNALIGNED_SHORT_ASM_OP
255 #define UNALIGNED_SHORT_ASM_OP ".2byte"
257 #ifndef UNALIGNED_INT_ASM_OP
258 #define UNALIGNED_INT_ASM_OP ".4byte"
260 #ifndef UNALIGNED_DOUBLE_INT_ASM_OP
261 #define UNALIGNED_DOUBLE_INT_ASM_OP ".8byte"
263 #endif /* OBJECT_FORMAT_ELF */
266 #define ASM_BYTE_OP ".byte"
269 /* Data and reference forms for relocatable data. */
270 #define DW_FORM_data (DWARF_OFFSET_SIZE == 8 ? DW_FORM_data8 : DW_FORM_data4)
271 #define DW_FORM_ref (DWARF_OFFSET_SIZE == 8 ? DW_FORM_ref8 : DW_FORM_ref4)
273 /* Pseudo-op for defining a new section. */
274 #ifndef SECTION_ASM_OP
275 #define SECTION_ASM_OP ".section"
278 /* The default format used by the ASM_OUTPUT_SECTION macro (see below) to
279 print the SECTION_ASM_OP and the section name. The default here works for
280 almost all svr4 assemblers, except for the sparc, where the section name
281 must be enclosed in double quotes. (See sparcv4.h). */
282 #ifndef SECTION_FORMAT
283 #ifdef PUSHSECTION_FORMAT
284 #define SECTION_FORMAT PUSHSECTION_FORMAT
286 #define SECTION_FORMAT "\t%s\t%s\n"
290 #ifndef FRAME_SECTION
291 #define FRAME_SECTION ".debug_frame"
294 #ifndef FUNC_BEGIN_LABEL
295 #define FUNC_BEGIN_LABEL "LFB"
297 #ifndef FUNC_END_LABEL
298 #define FUNC_END_LABEL "LFE"
300 #define CIE_AFTER_SIZE_LABEL "LSCIE"
301 #define CIE_END_LABEL "LECIE"
302 #define CIE_LENGTH_LABEL "LLCIE"
303 #define FDE_AFTER_SIZE_LABEL "LSFDE"
304 #define FDE_END_LABEL "LEFDE"
305 #define FDE_LENGTH_LABEL "LLFDE"
307 /* Definitions of defaults for various types of primitive assembly language
308 output operations. These may be overridden from within the tm.h file,
309 but typically, that is unnecessary. */
311 #ifndef ASM_OUTPUT_SECTION
312 #define ASM_OUTPUT_SECTION(FILE, SECTION) \
313 fprintf ((FILE), SECTION_FORMAT, SECTION_ASM_OP, SECTION)
316 #ifndef ASM_OUTPUT_DWARF_DATA1
317 #define ASM_OUTPUT_DWARF_DATA1(FILE,VALUE) \
318 fprintf ((FILE), "\t%s\t0x%x", ASM_BYTE_OP, (unsigned) (VALUE))
321 #ifndef ASM_OUTPUT_DWARF_DELTA1
322 #define ASM_OUTPUT_DWARF_DELTA1(FILE,LABEL1,LABEL2) \
323 do { fprintf ((FILE), "\t%s\t", ASM_BYTE_OP); \
324 assemble_name (FILE, LABEL1); \
325 fprintf (FILE, "-"); \
326 assemble_name (FILE, LABEL2); \
330 #ifdef UNALIGNED_INT_ASM_OP
332 #ifndef UNALIGNED_OFFSET_ASM_OP
333 #define UNALIGNED_OFFSET_ASM_OP \
334 (DWARF_OFFSET_SIZE == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP : UNALIGNED_INT_ASM_OP)
337 #ifndef UNALIGNED_WORD_ASM_OP
338 #define UNALIGNED_WORD_ASM_OP \
339 ((DWARF2_ADDR_SIZE) == 8 ? UNALIGNED_DOUBLE_INT_ASM_OP \
340 : (DWARF2_ADDR_SIZE) == 2 ? UNALIGNED_SHORT_ASM_OP \
341 : UNALIGNED_INT_ASM_OP)
344 #ifndef ASM_OUTPUT_DWARF_DELTA2
345 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
346 do { fprintf ((FILE), "\t%s\t", UNALIGNED_SHORT_ASM_OP); \
347 assemble_name (FILE, LABEL1); \
348 fprintf (FILE, "-"); \
349 assemble_name (FILE, LABEL2); \
353 #ifndef ASM_OUTPUT_DWARF_DELTA4
354 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
355 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
356 assemble_name (FILE, LABEL1); \
357 fprintf (FILE, "-"); \
358 assemble_name (FILE, LABEL2); \
362 #ifndef ASM_OUTPUT_DWARF_DELTA
363 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
364 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
365 assemble_name (FILE, LABEL1); \
366 fprintf (FILE, "-"); \
367 assemble_name (FILE, LABEL2); \
371 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
372 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
373 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
374 assemble_name (FILE, LABEL1); \
375 fprintf (FILE, "-"); \
376 assemble_name (FILE, LABEL2); \
380 #ifndef ASM_OUTPUT_DWARF_ADDR
381 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
382 do { fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
383 assemble_name (FILE, LABEL); \
387 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
388 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,RTX) \
390 fprintf ((FILE), "\t%s\t", UNALIGNED_WORD_ASM_OP); \
391 output_addr_const ((FILE), (RTX)); \
395 #ifndef ASM_OUTPUT_DWARF_OFFSET4
396 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
397 do { fprintf ((FILE), "\t%s\t", UNALIGNED_INT_ASM_OP); \
398 assemble_name (FILE, LABEL); \
402 #ifndef ASM_OUTPUT_DWARF_OFFSET
403 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
404 do { fprintf ((FILE), "\t%s\t", UNALIGNED_OFFSET_ASM_OP); \
405 assemble_name (FILE, LABEL); \
409 #ifndef ASM_OUTPUT_DWARF_DATA2
410 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
411 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_SHORT_ASM_OP, (unsigned) (VALUE))
414 #ifndef ASM_OUTPUT_DWARF_DATA4
415 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
416 fprintf ((FILE), "\t%s\t0x%x", UNALIGNED_INT_ASM_OP, (unsigned) (VALUE))
419 #ifndef ASM_OUTPUT_DWARF_DATA8
420 #define ASM_OUTPUT_DWARF_DATA8(FILE,VALUE) \
421 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_DOUBLE_INT_ASM_OP, \
422 (unsigned long) (VALUE))
425 #ifndef ASM_OUTPUT_DWARF_DATA
426 #define ASM_OUTPUT_DWARF_DATA(FILE,VALUE) \
427 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_OFFSET_ASM_OP, \
428 (unsigned long) (VALUE))
431 #ifndef ASM_OUTPUT_DWARF_ADDR_DATA
432 #define ASM_OUTPUT_DWARF_ADDR_DATA(FILE,VALUE) \
433 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_WORD_ASM_OP, \
434 (unsigned long) (VALUE))
437 #ifndef ASM_OUTPUT_DWARF_CONST_DOUBLE
438 #define ASM_OUTPUT_DWARF_CONST_DOUBLE(FILE,HIGH_VALUE,LOW_VALUE) \
440 if (WORDS_BIG_ENDIAN) \
442 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (HIGH_VALUE));\
443 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (LOW_VALUE));\
447 fprintf ((FILE), "\t%s\t0x%lx\n", UNALIGNED_INT_ASM_OP, (LOW_VALUE)); \
448 fprintf ((FILE), "\t%s\t0x%lx", UNALIGNED_INT_ASM_OP, (HIGH_VALUE)); \
453 #else /* UNALIGNED_INT_ASM_OP */
455 /* We don't have unaligned support, let's hope the normal output works for
456 .debug_frame. But we know it won't work for .debug_info. */
458 #ifdef DWARF2_DEBUGGING_INFO
459 #error DWARF2_DEBUGGING_INFO requires UNALIGNED_INT_ASM_OP.
462 #ifndef ASM_OUTPUT_DWARF_ADDR
463 #define ASM_OUTPUT_DWARF_ADDR(FILE,LABEL) \
464 assemble_integer (gen_rtx_SYMBOL_REF (Pmode, LABEL), DWARF2_ADDR_SIZE, 1)
467 #ifndef ASM_OUTPUT_DWARF_ADDR_CONST
468 #define ASM_OUTPUT_DWARF_ADDR_CONST(FILE,RTX) ASM_OUTPUT_DWARF_ADDR (FILE,RTX)
471 #ifndef ASM_OUTPUT_DWARF_OFFSET4
472 #define ASM_OUTPUT_DWARF_OFFSET4(FILE,LABEL) \
473 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
476 #ifndef ASM_OUTPUT_DWARF_OFFSET
477 #define ASM_OUTPUT_DWARF_OFFSET(FILE,LABEL) \
478 assemble_integer (gen_rtx_SYMBOL_REF (SImode, LABEL), 4, 1)
481 #ifndef ASM_OUTPUT_DWARF_DELTA2
482 #define ASM_OUTPUT_DWARF_DELTA2(FILE,LABEL1,LABEL2) \
483 assemble_integer (gen_rtx_MINUS (HImode, \
484 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
485 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
489 #ifndef ASM_OUTPUT_DWARF_DELTA4
490 #define ASM_OUTPUT_DWARF_DELTA4(FILE,LABEL1,LABEL2) \
491 assemble_integer (gen_rtx_MINUS (SImode, \
492 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
493 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
497 #ifndef ASM_OUTPUT_DWARF_ADDR_DELTA
498 #define ASM_OUTPUT_DWARF_ADDR_DELTA(FILE,LABEL1,LABEL2) \
499 assemble_integer (gen_rtx_MINUS (Pmode, \
500 gen_rtx_SYMBOL_REF (Pmode, LABEL1), \
501 gen_rtx_SYMBOL_REF (Pmode, LABEL2)), \
505 #ifndef ASM_OUTPUT_DWARF_DELTA
506 #define ASM_OUTPUT_DWARF_DELTA(FILE,LABEL1,LABEL2) \
507 ASM_OUTPUT_DWARF_DELTA4 (FILE,LABEL1,LABEL2)
510 #ifndef ASM_OUTPUT_DWARF_DATA2
511 #define ASM_OUTPUT_DWARF_DATA2(FILE,VALUE) \
512 assemble_integer (GEN_INT (VALUE), 2, 1)
515 #ifndef ASM_OUTPUT_DWARF_DATA4
516 #define ASM_OUTPUT_DWARF_DATA4(FILE,VALUE) \
517 assemble_integer (GEN_INT (VALUE), 4, 1)
520 #endif /* UNALIGNED_INT_ASM_OP */
523 #ifndef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
524 #define ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL(FILE, SY, HI, LO) \
526 fprintf (FILE, "\t%s\t", SET_ASM_OP); \
527 assemble_name (FILE, SY); \
529 assemble_name (FILE, HI); \
531 assemble_name (FILE, LO); \
534 #endif /* SET_ASM_OP */
536 /* This is similar to the default ASM_OUTPUT_ASCII, except that no trailing
537 newline is produced. When flag_debug_asm is asserted, we add commentary
538 at the end of the line, so we must avoid output of a newline here. */
539 #ifndef ASM_OUTPUT_DWARF_STRING
540 #define ASM_OUTPUT_DWARF_STRING(FILE,P) \
542 register int slen = strlen(P); \
543 register const char *p = (P); \
545 fprintf (FILE, "\t.ascii \""); \
546 for (i = 0; i < slen; i++) \
548 register int c = p[i]; \
549 if (c == '\"' || c == '\\') \
555 fprintf (FILE, "\\%o", c); \
558 fprintf (FILE, "\\0\""); \
563 /* The DWARF 2 CFA column which tracks the return address. Normally this
564 is the column for PC, or the first column after all of the hard
566 #ifndef DWARF_FRAME_RETURN_COLUMN
568 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (PC_REGNUM)
570 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGISTERS
574 /* The mapping from gcc register number to DWARF 2 CFA column number. By
575 default, we just provide columns for all registers. */
576 #ifndef DWARF_FRAME_REGNUM
577 #define DWARF_FRAME_REGNUM(REG) DBX_REGISTER_NUMBER (REG)
580 /* Hook used by __throw. */
583 expand_builtin_dwarf_fp_regnum ()
585 return GEN_INT (DWARF_FRAME_REGNUM (HARD_FRAME_POINTER_REGNUM));
588 /* The offset from the incoming value of %sp to the top of the stack frame
589 for the current function. */
590 #ifndef INCOMING_FRAME_SP_OFFSET
591 #define INCOMING_FRAME_SP_OFFSET 0
594 /* Return a pointer to a copy of the section string name S with all
595 attributes stripped off, and an asterisk prepended (for assemble_name). */
601 char *stripped = xmalloc (strlen (s) + 2);
606 while (*s && *s != ',')
613 /* Generate code to initialize the register size table. */
616 expand_builtin_init_dwarf_reg_sizes (address)
620 enum machine_mode mode = TYPE_MODE (char_type_node);
621 rtx addr = expand_expr (address, NULL_RTX, VOIDmode, 0);
622 rtx mem = gen_rtx_MEM (mode, addr);
624 for (i = 0; i < DWARF_FRAME_REGISTERS; ++i)
626 int offset = DWARF_FRAME_REGNUM (i) * GET_MODE_SIZE (mode);
627 int size = GET_MODE_SIZE (reg_raw_mode[i]);
632 emit_move_insn (change_address (mem, mode,
633 plus_constant (addr, offset)),
638 /* Convert a DWARF call frame info. operation to its string name */
641 dwarf_cfi_name (cfi_opc)
642 register unsigned cfi_opc;
646 case DW_CFA_advance_loc:
647 return "DW_CFA_advance_loc";
649 return "DW_CFA_offset";
651 return "DW_CFA_restore";
655 return "DW_CFA_set_loc";
656 case DW_CFA_advance_loc1:
657 return "DW_CFA_advance_loc1";
658 case DW_CFA_advance_loc2:
659 return "DW_CFA_advance_loc2";
660 case DW_CFA_advance_loc4:
661 return "DW_CFA_advance_loc4";
662 case DW_CFA_offset_extended:
663 return "DW_CFA_offset_extended";
664 case DW_CFA_restore_extended:
665 return "DW_CFA_restore_extended";
666 case DW_CFA_undefined:
667 return "DW_CFA_undefined";
668 case DW_CFA_same_value:
669 return "DW_CFA_same_value";
670 case DW_CFA_register:
671 return "DW_CFA_register";
672 case DW_CFA_remember_state:
673 return "DW_CFA_remember_state";
674 case DW_CFA_restore_state:
675 return "DW_CFA_restore_state";
677 return "DW_CFA_def_cfa";
678 case DW_CFA_def_cfa_register:
679 return "DW_CFA_def_cfa_register";
680 case DW_CFA_def_cfa_offset:
681 return "DW_CFA_def_cfa_offset";
682 case DW_CFA_def_cfa_expression:
683 return "DW_CFA_def_cfa_expression";
685 /* SGI/MIPS specific */
686 case DW_CFA_MIPS_advance_loc8:
687 return "DW_CFA_MIPS_advance_loc8";
690 case DW_CFA_GNU_window_save:
691 return "DW_CFA_GNU_window_save";
692 case DW_CFA_GNU_args_size:
693 return "DW_CFA_GNU_args_size";
694 case DW_CFA_GNU_negative_offset_extended:
695 return "DW_CFA_GNU_negative_offset_extended";
698 return "DW_CFA_<unknown>";
702 /* Return a pointer to a newly allocated Call Frame Instruction. */
704 static inline dw_cfi_ref
707 register dw_cfi_ref cfi = (dw_cfi_ref) xmalloc (sizeof (dw_cfi_node));
709 cfi->dw_cfi_next = NULL;
710 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = 0;
711 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = 0;
716 /* Add a Call Frame Instruction to list of instructions. */
719 add_cfi (list_head, cfi)
720 register dw_cfi_ref *list_head;
721 register dw_cfi_ref cfi;
723 register dw_cfi_ref *p;
725 /* Find the end of the chain. */
726 for (p = list_head; (*p) != NULL; p = &(*p)->dw_cfi_next)
732 /* Generate a new label for the CFI info to refer to. */
735 dwarf2out_cfi_label ()
737 static char label[20];
738 static unsigned long label_num = 0;
740 ASM_GENERATE_INTERNAL_LABEL (label, "LCFI", label_num++);
741 ASM_OUTPUT_LABEL (asm_out_file, label);
746 /* Add CFI to the current fde at the PC value indicated by LABEL if specified,
747 or to the CIE if LABEL is NULL. */
750 add_fde_cfi (label, cfi)
751 register const char *label;
752 register dw_cfi_ref cfi;
756 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
759 label = dwarf2out_cfi_label ();
761 if (fde->dw_fde_current_label == NULL
762 || strcmp (label, fde->dw_fde_current_label) != 0)
764 register dw_cfi_ref xcfi;
766 fde->dw_fde_current_label = label = xstrdup (label);
768 /* Set the location counter to the new label. */
770 xcfi->dw_cfi_opc = DW_CFA_advance_loc4;
771 xcfi->dw_cfi_oprnd1.dw_cfi_addr = label;
772 add_cfi (&fde->dw_fde_cfi, xcfi);
775 add_cfi (&fde->dw_fde_cfi, cfi);
779 add_cfi (&cie_cfi_head, cfi);
782 /* Subroutine of lookup_cfa. */
785 lookup_cfa_1 (cfi, loc)
786 register dw_cfi_ref cfi;
787 register dw_cfa_location *loc;
789 switch (cfi->dw_cfi_opc)
791 case DW_CFA_def_cfa_offset:
792 loc->offset = cfi->dw_cfi_oprnd1.dw_cfi_offset;
794 case DW_CFA_def_cfa_register:
795 loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
798 loc->reg = cfi->dw_cfi_oprnd1.dw_cfi_reg_num;
799 loc->offset = cfi->dw_cfi_oprnd2.dw_cfi_offset;
801 case DW_CFA_def_cfa_expression:
802 get_cfa_from_loc_descr (loc, cfi->dw_cfi_oprnd1.dw_cfi_loc);
809 /* Find the previous value for the CFA. */
813 register dw_cfa_location *loc;
815 register dw_cfi_ref cfi;
817 loc->reg = (unsigned long) -1;
820 loc->base_offset = 0;
822 for (cfi = cie_cfi_head; cfi; cfi = cfi->dw_cfi_next)
823 lookup_cfa_1 (cfi, loc);
825 if (fde_table_in_use)
827 register dw_fde_ref fde = &fde_table[fde_table_in_use - 1];
828 for (cfi = fde->dw_fde_cfi; cfi; cfi = cfi->dw_cfi_next)
829 lookup_cfa_1 (cfi, loc);
833 /* The current rule for calculating the DWARF2 canonical frame address. */
836 /* The register used for saving registers to the stack, and its offset
838 dw_cfa_location cfa_store;
840 /* The running total of the size of arguments pushed onto the stack. */
841 static long args_size;
843 /* The last args_size we actually output. */
844 static long old_args_size;
846 /* Entry point to update the canonical frame address (CFA).
847 LABEL is passed to add_fde_cfi. The value of CFA is now to be
848 calculated from REG+OFFSET. */
851 dwarf2out_def_cfa (label, reg, offset)
852 register const char *label;
861 def_cfa_1 (label, &loc);
864 /* This routine does the actual work. The CFA is now calculated from
865 the dw_cfa_location structure. */
867 def_cfa_1 (label, loc_p)
868 register const char *label;
869 dw_cfa_location *loc_p;
871 register dw_cfi_ref cfi;
872 dw_cfa_location old_cfa, loc;
877 if (cfa_store.reg == loc.reg && loc.indirect == 0)
878 cfa_store.offset = loc.offset;
880 loc.reg = DWARF_FRAME_REGNUM (loc.reg);
881 lookup_cfa (&old_cfa);
883 if (loc.reg == old_cfa.reg && loc.offset == old_cfa.offset &&
884 loc.indirect == old_cfa.indirect)
886 if (loc.indirect == 0
887 || loc.base_offset == old_cfa.base_offset)
893 if (loc.reg == old_cfa.reg && !loc.indirect)
895 cfi->dw_cfi_opc = DW_CFA_def_cfa_offset;
896 cfi->dw_cfi_oprnd1.dw_cfi_offset = loc.offset;
899 #ifndef MIPS_DEBUGGING_INFO /* SGI dbx thinks this means no offset. */
900 else if (loc.offset == old_cfa.offset && old_cfa.reg != (unsigned long) -1
903 cfi->dw_cfi_opc = DW_CFA_def_cfa_register;
904 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg;
908 else if (loc.indirect == 0)
910 cfi->dw_cfi_opc = DW_CFA_def_cfa;
911 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = loc.reg;
912 cfi->dw_cfi_oprnd2.dw_cfi_offset = loc.offset;
916 struct dw_loc_descr_struct *loc_list;
917 cfi->dw_cfi_opc = DW_CFA_def_cfa_expression;
918 loc_list = build_cfa_loc (&loc);
919 cfi->dw_cfi_oprnd1.dw_cfi_loc = loc_list;
922 add_fde_cfi (label, cfi);
925 /* Add the CFI for saving a register. REG is the CFA column number.
926 LABEL is passed to add_fde_cfi.
927 If SREG is -1, the register is saved at OFFSET from the CFA;
928 otherwise it is saved in SREG. */
931 reg_save (label, reg, sreg, offset)
932 register const char *label;
933 register unsigned reg;
934 register unsigned sreg;
935 register long offset;
937 register dw_cfi_ref cfi = new_cfi ();
939 cfi->dw_cfi_oprnd1.dw_cfi_reg_num = reg;
941 /* The following comparison is correct. -1 is used to indicate that
942 the value isn't a register number. */
943 if (sreg == (unsigned int) -1)
946 /* The register number won't fit in 6 bits, so we have to use
948 cfi->dw_cfi_opc = DW_CFA_offset_extended;
950 cfi->dw_cfi_opc = DW_CFA_offset;
952 offset /= DWARF_CIE_DATA_ALIGNMENT;
955 cfi->dw_cfi_opc = DW_CFA_GNU_negative_offset_extended;
958 cfi->dw_cfi_oprnd2.dw_cfi_offset = offset;
960 else if (sreg == reg)
961 /* We could emit a DW_CFA_same_value in this case, but don't bother. */
965 cfi->dw_cfi_opc = DW_CFA_register;
966 cfi->dw_cfi_oprnd2.dw_cfi_reg_num = sreg;
969 add_fde_cfi (label, cfi);
972 /* Add the CFI for saving a register window. LABEL is passed to reg_save.
973 This CFI tells the unwinder that it needs to restore the window registers
974 from the previous frame's window save area.
976 ??? Perhaps we should note in the CIE where windows are saved (instead of
977 assuming 0(cfa)) and what registers are in the window. */
980 dwarf2out_window_save (label)
981 register const char *label;
983 register dw_cfi_ref cfi = new_cfi ();
984 cfi->dw_cfi_opc = DW_CFA_GNU_window_save;
985 add_fde_cfi (label, cfi);
988 /* Add a CFI to update the running total of the size of arguments
989 pushed onto the stack. */
992 dwarf2out_args_size (label, size)
996 register dw_cfi_ref cfi;
998 if (size == old_args_size)
1000 old_args_size = size;
1003 cfi->dw_cfi_opc = DW_CFA_GNU_args_size;
1004 cfi->dw_cfi_oprnd1.dw_cfi_offset = size;
1005 add_fde_cfi (label, cfi);
1008 /* Entry point for saving a register to the stack. REG is the GCC register
1009 number. LABEL and OFFSET are passed to reg_save. */
1012 dwarf2out_reg_save (label, reg, offset)
1013 register const char *label;
1014 register unsigned reg;
1015 register long offset;
1017 reg_save (label, DWARF_FRAME_REGNUM (reg), -1, offset);
1020 /* Entry point for saving the return address in the stack.
1021 LABEL and OFFSET are passed to reg_save. */
1024 dwarf2out_return_save (label, offset)
1025 register const char *label;
1026 register long offset;
1028 reg_save (label, DWARF_FRAME_RETURN_COLUMN, -1, offset);
1031 /* Entry point for saving the return address in a register.
1032 LABEL and SREG are passed to reg_save. */
1035 dwarf2out_return_reg (label, sreg)
1036 register const char *label;
1037 register unsigned sreg;
1039 reg_save (label, DWARF_FRAME_RETURN_COLUMN, sreg, 0);
1042 /* Record the initial position of the return address. RTL is
1043 INCOMING_RETURN_ADDR_RTX. */
1046 initial_return_save (rtl)
1049 unsigned int reg = (unsigned int) -1;
1052 switch (GET_CODE (rtl))
1055 /* RA is in a register. */
1056 reg = DWARF_FRAME_REGNUM (REGNO (rtl));
1059 /* RA is on the stack. */
1060 rtl = XEXP (rtl, 0);
1061 switch (GET_CODE (rtl))
1064 if (REGNO (rtl) != STACK_POINTER_REGNUM)
1069 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1071 offset = INTVAL (XEXP (rtl, 1));
1074 if (REGNO (XEXP (rtl, 0)) != STACK_POINTER_REGNUM)
1076 offset = -INTVAL (XEXP (rtl, 1));
1083 /* The return address is at some offset from any value we can
1084 actually load. For instance, on the SPARC it is in %i7+8. Just
1085 ignore the offset for now; it doesn't matter for unwinding frames. */
1086 if (GET_CODE (XEXP (rtl, 1)) != CONST_INT)
1088 initial_return_save (XEXP (rtl, 0));
1094 reg_save (NULL, DWARF_FRAME_RETURN_COLUMN, reg, offset - cfa.offset);
1097 /* Check INSN to see if it looks like a push or a stack adjustment, and
1098 make a note of it if it does. EH uses this information to find out how
1099 much extra space it needs to pop off the stack. */
1102 dwarf2out_stack_adjust (insn)
1108 if (! asynchronous_exceptions && GET_CODE (insn) == CALL_INSN)
1110 /* Extract the size of the args from the CALL rtx itself. */
1112 insn = PATTERN (insn);
1113 if (GET_CODE (insn) == PARALLEL)
1114 insn = XVECEXP (insn, 0, 0);
1115 if (GET_CODE (insn) == SET)
1116 insn = SET_SRC (insn);
1117 if (GET_CODE (insn) != CALL)
1119 dwarf2out_args_size ("", INTVAL (XEXP (insn, 1)));
1123 /* If only calls can throw, and we have a frame pointer,
1124 save up adjustments until we see the CALL_INSN. */
1125 else if (! asynchronous_exceptions
1126 && cfa.reg != STACK_POINTER_REGNUM)
1129 if (GET_CODE (insn) == BARRIER)
1131 /* When we see a BARRIER, we know to reset args_size to 0. Usually
1132 the compiler will have already emitted a stack adjustment, but
1133 doesn't bother for calls to noreturn functions. */
1134 #ifdef STACK_GROWS_DOWNWARD
1135 offset = -args_size;
1140 else if (GET_CODE (PATTERN (insn)) == SET)
1145 insn = PATTERN (insn);
1146 src = SET_SRC (insn);
1147 dest = SET_DEST (insn);
1149 if (dest == stack_pointer_rtx)
1151 /* (set (reg sp) (plus (reg sp) (const_int))) */
1152 code = GET_CODE (src);
1153 if (! (code == PLUS || code == MINUS)
1154 || XEXP (src, 0) != stack_pointer_rtx
1155 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1158 offset = INTVAL (XEXP (src, 1));
1160 else if (GET_CODE (dest) == MEM)
1162 /* (set (mem (pre_dec (reg sp))) (foo)) */
1163 src = XEXP (dest, 0);
1164 code = GET_CODE (src);
1166 if (! (code == PRE_DEC || code == PRE_INC)
1167 || XEXP (src, 0) != stack_pointer_rtx)
1170 offset = GET_MODE_SIZE (GET_MODE (dest));
1175 if (code == PLUS || code == PRE_INC)
1184 if (cfa.reg == STACK_POINTER_REGNUM)
1185 cfa.offset += offset;
1187 #ifndef STACK_GROWS_DOWNWARD
1190 args_size += offset;
1194 label = dwarf2out_cfi_label ();
1195 def_cfa_1 (label, &cfa);
1196 dwarf2out_args_size (label, args_size);
1199 /* A temporary register used in adjusting SP or setting up the store_reg. */
1200 static unsigned cfa_temp_reg;
1202 /* A temporary value used in adjusting SP or setting up the store_reg. */
1203 static long cfa_temp_value;
1205 /* Record call frame debugging information for an expression, which either
1206 sets SP or FP (adjusting how we calculate the frame address) or saves a
1207 register to the stack. */
1210 dwarf2out_frame_debug_expr (expr, label)
1217 /* If RTX_FRAME_RELATED_P is set on a PARALLEL, process each member of
1218 the PARALLEL independently. The first element is always processed if
1219 it is a SET. This is for backward compatability. Other elements
1220 are processed only if they are SETs and the RTX_FRAME_RELATED_P
1221 flag is set in them. */
1223 if (GET_CODE (expr) == PARALLEL
1224 || GET_CODE (expr) == SEQUENCE)
1227 int limit = XVECLEN (expr, 0);
1229 for (par_index = 0; par_index < limit; par_index++)
1231 rtx x = XVECEXP (expr, 0, par_index);
1233 if (GET_CODE (x) == SET &&
1234 (RTX_FRAME_RELATED_P (x) || par_index == 0))
1235 dwarf2out_frame_debug_expr (x, label);
1240 if (GET_CODE (expr) != SET)
1243 src = SET_SRC (expr);
1244 dest = SET_DEST (expr);
1246 switch (GET_CODE (dest))
1249 /* Update the CFA rule wrt SP or FP. Make sure src is
1250 relative to the current CFA register. */
1251 switch (GET_CODE (src))
1253 /* Setting FP from SP. */
1255 if (cfa.reg == (unsigned) REGNO (src))
1261 /* We used to require that dest be either SP or FP, but the
1262 ARM copies SP to a temporary register, and from there to
1263 FP. So we just rely on the backends to only set
1264 RTX_FRAME_RELATED_P on appropriate insns. */
1265 cfa.reg = REGNO (dest);
1270 if (dest == stack_pointer_rtx)
1273 switch (GET_CODE (XEXP (src, 1)))
1276 offset = INTVAL (XEXP (src, 1));
1279 if ((unsigned) REGNO (XEXP (src, 1)) != cfa_temp_reg)
1281 offset = cfa_temp_value;
1287 if (XEXP (src, 0) == hard_frame_pointer_rtx)
1289 /* Restoring SP from FP in the epilogue. */
1290 if (cfa.reg != (unsigned) HARD_FRAME_POINTER_REGNUM)
1292 cfa.reg = STACK_POINTER_REGNUM;
1294 else if (XEXP (src, 0) != stack_pointer_rtx)
1297 if (GET_CODE (src) == PLUS)
1299 if (cfa.reg == STACK_POINTER_REGNUM)
1300 cfa.offset += offset;
1301 if (cfa_store.reg == STACK_POINTER_REGNUM)
1302 cfa_store.offset += offset;
1304 else if (dest == hard_frame_pointer_rtx)
1306 /* Either setting the FP from an offset of the SP,
1307 or adjusting the FP */
1308 if (! frame_pointer_needed)
1311 if (GET_CODE (XEXP (src, 0)) == REG
1312 && (unsigned) REGNO (XEXP (src, 0)) == cfa.reg
1313 && GET_CODE (XEXP (src, 1)) == CONST_INT)
1315 offset = INTVAL (XEXP (src, 1));
1316 if (GET_CODE (src) == PLUS)
1318 cfa.offset += offset;
1319 cfa.reg = HARD_FRAME_POINTER_REGNUM;
1326 if (GET_CODE (src) != PLUS
1327 || XEXP (src, 1) != stack_pointer_rtx)
1329 if (GET_CODE (XEXP (src, 0)) != REG
1330 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg)
1332 if (cfa.reg != STACK_POINTER_REGNUM)
1334 cfa_store.reg = REGNO (dest);
1335 cfa_store.offset = cfa.offset - cfa_temp_value;
1340 cfa_temp_reg = REGNO (dest);
1341 cfa_temp_value = INTVAL (src);
1345 if (GET_CODE (XEXP (src, 0)) != REG
1346 || (unsigned) REGNO (XEXP (src, 0)) != cfa_temp_reg
1347 || (unsigned) REGNO (dest) != cfa_temp_reg
1348 || GET_CODE (XEXP (src, 1)) != CONST_INT)
1350 cfa_temp_value |= INTVAL (XEXP (src, 1));
1356 def_cfa_1 (label, &cfa);
1359 /* Skip over HIGH, assuming it will be followed by a LO_SUM, which
1360 will fill in all of the bits. */
1365 cfa_temp_reg = REGNO (dest);
1366 cfa_temp_value = INTVAL (XEXP (src, 1));
1370 if (GET_CODE (src) != REG)
1373 /* Saving a register to the stack. Make sure dest is relative to the
1375 switch (GET_CODE (XEXP (dest, 0)))
1380 offset = GET_MODE_SIZE (GET_MODE (dest));
1381 if (GET_CODE (XEXP (dest, 0)) == PRE_INC)
1384 if (REGNO (XEXP (XEXP (dest, 0), 0)) != STACK_POINTER_REGNUM
1385 || cfa_store.reg != STACK_POINTER_REGNUM)
1387 cfa_store.offset += offset;
1388 if (cfa.reg == STACK_POINTER_REGNUM)
1389 cfa.offset = cfa_store.offset;
1391 offset = -cfa_store.offset;
1394 /* With an offset. */
1397 offset = INTVAL (XEXP (XEXP (dest, 0), 1));
1398 if (GET_CODE (XEXP (dest, 0)) == MINUS)
1401 if (cfa_store.reg != (unsigned) REGNO (XEXP (XEXP (dest, 0), 0)))
1403 offset -= cfa_store.offset;
1406 /* Without an offset. */
1408 if (cfa_store.reg != (unsigned) REGNO (XEXP (dest, 0)))
1410 offset = -cfa_store.offset;
1417 if (REGNO (src) != STACK_POINTER_REGNUM
1418 && REGNO (src) != HARD_FRAME_POINTER_REGNUM
1419 && (unsigned) REGNO (src) == cfa.reg)
1421 /* We're storing the current CFA reg into the stack. */
1423 if (cfa.offset == 0)
1425 /* If the source register is exactly the CFA, assume
1426 we're saving SP like any other register; this happens
1429 def_cfa_1 (label, &cfa);
1430 dwarf2out_reg_save (label, STACK_POINTER_REGNUM, offset);
1435 /* Otherwise, we'll need to look in the stack to
1436 calculate the CFA. */
1438 rtx x = XEXP (dest, 0);
1439 if (GET_CODE (x) != REG)
1441 if (GET_CODE (x) != REG)
1443 cfa.reg = (unsigned) REGNO (x);
1444 cfa.base_offset = offset;
1446 def_cfa_1 (label, &cfa);
1451 def_cfa_1 (label, &cfa);
1452 dwarf2out_reg_save (label, REGNO (src), offset);
1460 /* Record call frame debugging information for INSN, which either
1461 sets SP or FP (adjusting how we calculate the frame address) or saves a
1462 register to the stack. If INSN is NULL_RTX, initialize our state. */
1465 dwarf2out_frame_debug (insn)
1471 if (insn == NULL_RTX)
1473 /* Set up state for generating call frame debug info. */
1475 if (cfa.reg != (unsigned long) DWARF_FRAME_REGNUM (STACK_POINTER_REGNUM))
1477 cfa.reg = STACK_POINTER_REGNUM;
1484 if (! RTX_FRAME_RELATED_P (insn))
1486 dwarf2out_stack_adjust (insn);
1490 label = dwarf2out_cfi_label ();
1492 src = find_reg_note (insn, REG_FRAME_RELATED_EXPR, NULL_RTX);
1494 insn = XEXP (src, 0);
1496 insn = PATTERN (insn);
1498 dwarf2out_frame_debug_expr (insn, label);
1501 /* Return the size of an unsigned LEB128 quantity. */
1503 static inline unsigned long
1504 size_of_uleb128 (value)
1505 register unsigned long value;
1507 register unsigned long size = 0;
1508 register unsigned byte;
1512 byte = (value & 0x7f);
1521 /* Return the size of a signed LEB128 quantity. */
1523 static inline unsigned long
1524 size_of_sleb128 (value)
1525 register long value;
1527 register unsigned long size = 0;
1528 register unsigned byte;
1532 byte = (value & 0x7f);
1536 while (!(((value == 0) && ((byte & 0x40) == 0))
1537 || ((value == -1) && ((byte & 0x40) != 0))));
1542 /* Output an unsigned LEB128 quantity. */
1545 output_uleb128 (value)
1546 register unsigned long value;
1548 unsigned long save_value = value;
1550 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1553 register unsigned byte = (value & 0x7f);
1556 /* More bytes to follow. */
1559 fprintf (asm_out_file, "0x%x", byte);
1561 fprintf (asm_out_file, ",");
1566 fprintf (asm_out_file, "\t%s ULEB128 0x%lx", ASM_COMMENT_START, save_value);
1569 /* Output an signed LEB128 quantity. */
1572 output_sleb128 (value)
1573 register long value;
1576 register unsigned byte;
1577 long save_value = value;
1579 fprintf (asm_out_file, "\t%s\t", ASM_BYTE_OP);
1582 byte = (value & 0x7f);
1583 /* arithmetic shift */
1585 more = !((((value == 0) && ((byte & 0x40) == 0))
1586 || ((value == -1) && ((byte & 0x40) != 0))));
1590 fprintf (asm_out_file, "0x%x", byte);
1592 fprintf (asm_out_file, ",");
1597 fprintf (asm_out_file, "\t%s SLEB128 %ld", ASM_COMMENT_START, save_value);
1600 /* Output a Call Frame Information opcode and its operand(s). */
1603 output_cfi (cfi, fde)
1604 register dw_cfi_ref cfi;
1605 register dw_fde_ref fde;
1607 if (cfi->dw_cfi_opc == DW_CFA_advance_loc)
1609 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1611 | (cfi->dw_cfi_oprnd1.dw_cfi_offset & 0x3f));
1613 fprintf (asm_out_file, "\t%s DW_CFA_advance_loc 0x%lx",
1614 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_offset);
1615 fputc ('\n', asm_out_file);
1618 else if (cfi->dw_cfi_opc == DW_CFA_offset)
1620 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1622 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1624 fprintf (asm_out_file, "\t%s DW_CFA_offset, column 0x%lx",
1625 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1627 fputc ('\n', asm_out_file);
1628 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1629 fputc ('\n', asm_out_file);
1631 else if (cfi->dw_cfi_opc == DW_CFA_restore)
1633 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
1635 | (cfi->dw_cfi_oprnd1.dw_cfi_reg_num & 0x3f));
1637 fprintf (asm_out_file, "\t%s DW_CFA_restore, column 0x%lx",
1638 ASM_COMMENT_START, cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1640 fputc ('\n', asm_out_file);
1644 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, cfi->dw_cfi_opc);
1646 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
1647 dwarf_cfi_name (cfi->dw_cfi_opc));
1649 fputc ('\n', asm_out_file);
1650 switch (cfi->dw_cfi_opc)
1652 case DW_CFA_set_loc:
1653 ASM_OUTPUT_DWARF_ADDR (asm_out_file, cfi->dw_cfi_oprnd1.dw_cfi_addr);
1654 fputc ('\n', asm_out_file);
1656 case DW_CFA_advance_loc1:
1657 ASM_OUTPUT_DWARF_DELTA1 (asm_out_file,
1658 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1659 fde->dw_fde_current_label);
1660 fputc ('\n', asm_out_file);
1661 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1663 case DW_CFA_advance_loc2:
1664 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file,
1665 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1666 fde->dw_fde_current_label);
1667 fputc ('\n', asm_out_file);
1668 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1670 case DW_CFA_advance_loc4:
1671 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file,
1672 cfi->dw_cfi_oprnd1.dw_cfi_addr,
1673 fde->dw_fde_current_label);
1674 fputc ('\n', asm_out_file);
1675 fde->dw_fde_current_label = cfi->dw_cfi_oprnd1.dw_cfi_addr;
1677 #ifdef MIPS_DEBUGGING_INFO
1678 case DW_CFA_MIPS_advance_loc8:
1679 /* TODO: not currently implemented. */
1683 case DW_CFA_offset_extended:
1684 case DW_CFA_GNU_negative_offset_extended:
1685 case DW_CFA_def_cfa:
1686 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1687 fputc ('\n', asm_out_file);
1688 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_offset);
1689 fputc ('\n', asm_out_file);
1691 case DW_CFA_restore_extended:
1692 case DW_CFA_undefined:
1693 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1694 fputc ('\n', asm_out_file);
1696 case DW_CFA_same_value:
1697 case DW_CFA_def_cfa_register:
1698 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1699 fputc ('\n', asm_out_file);
1701 case DW_CFA_register:
1702 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_reg_num);
1703 fputc ('\n', asm_out_file);
1704 output_uleb128 (cfi->dw_cfi_oprnd2.dw_cfi_reg_num);
1705 fputc ('\n', asm_out_file);
1707 case DW_CFA_def_cfa_offset:
1708 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1709 fputc ('\n', asm_out_file);
1711 case DW_CFA_GNU_window_save:
1713 case DW_CFA_GNU_args_size:
1714 output_uleb128 (cfi->dw_cfi_oprnd1.dw_cfi_offset);
1715 fputc ('\n', asm_out_file);
1717 case DW_CFA_def_cfa_expression:
1718 output_cfa_loc (cfi);
1726 /* Output the call frame information used to used to record information
1727 that relates to calculating the frame pointer, and records the
1728 location of saved registers. */
1731 output_call_frame_info (for_eh)
1734 register unsigned long i;
1735 register dw_fde_ref fde;
1736 register dw_cfi_ref cfi;
1737 char l1[20], l2[20];
1738 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1742 /* Do we want to include a pointer to the exception table? */
1743 int eh_ptr = for_eh && exception_table_p ();
1745 /* If we don't have any functions we'll want to unwind out of, don't
1746 emit any EH unwind information. */
1749 for (i = 0; i < fde_table_in_use; ++i)
1750 if (! fde_table[i].nothrow)
1756 fputc ('\n', asm_out_file);
1758 /* We're going to be generating comments, so turn on app. */
1764 #ifdef EH_FRAME_SECTION
1765 EH_FRAME_SECTION ();
1767 tree label = get_file_function_name ('F');
1769 force_data_section ();
1770 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1771 ASM_GLOBALIZE_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1772 ASM_OUTPUT_LABEL (asm_out_file, IDENTIFIER_POINTER (label));
1774 assemble_label ("__FRAME_BEGIN__");
1777 ASM_OUTPUT_SECTION (asm_out_file, FRAME_SECTION);
1779 /* Output the CIE. */
1780 ASM_GENERATE_INTERNAL_LABEL (l1, CIE_AFTER_SIZE_LABEL, for_eh);
1781 ASM_GENERATE_INTERNAL_LABEL (l2, CIE_END_LABEL, for_eh);
1782 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1783 ASM_GENERATE_INTERNAL_LABEL (ld, CIE_LENGTH_LABEL, for_eh);
1785 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1787 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1790 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1792 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1795 fprintf (asm_out_file, "\t%s Length of Common Information Entry",
1798 fputc ('\n', asm_out_file);
1799 ASM_OUTPUT_LABEL (asm_out_file, l1);
1802 /* Now that the CIE pointer is PC-relative for EH,
1803 use 0 to identify the CIE. */
1804 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1806 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1809 fprintf (asm_out_file, "\t%s CIE Identifier Tag", ASM_COMMENT_START);
1811 fputc ('\n', asm_out_file);
1812 if (! for_eh && DWARF_OFFSET_SIZE == 8)
1814 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, DW_CIE_ID);
1815 fputc ('\n', asm_out_file);
1818 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_CIE_VERSION);
1820 fprintf (asm_out_file, "\t%s CIE Version", ASM_COMMENT_START);
1822 fputc ('\n', asm_out_file);
1825 /* The CIE contains a pointer to the exception region info for the
1826 frame. Make the augmentation string three bytes (including the
1827 trailing null) so the pointer is 4-byte aligned. The Solaris ld
1828 can't handle unaligned relocs. */
1831 ASM_OUTPUT_DWARF_STRING (asm_out_file, "eh");
1832 fprintf (asm_out_file, "\t%s CIE Augmentation", ASM_COMMENT_START);
1836 ASM_OUTPUT_ASCII (asm_out_file, "eh", 3);
1838 fputc ('\n', asm_out_file);
1840 ASM_OUTPUT_DWARF_ADDR (asm_out_file, "__EXCEPTION_TABLE__");
1842 fprintf (asm_out_file, "\t%s pointer to exception region info",
1847 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
1849 fprintf (asm_out_file, "\t%s CIE Augmentation (none)",
1853 fputc ('\n', asm_out_file);
1856 fprintf (asm_out_file, " (CIE Code Alignment Factor)");
1858 fputc ('\n', asm_out_file);
1859 output_sleb128 (DWARF_CIE_DATA_ALIGNMENT);
1861 fprintf (asm_out_file, " (CIE Data Alignment Factor)");
1863 fputc ('\n', asm_out_file);
1864 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_FRAME_RETURN_COLUMN);
1866 fprintf (asm_out_file, "\t%s CIE RA Column", ASM_COMMENT_START);
1868 fputc ('\n', asm_out_file);
1870 for (cfi = cie_cfi_head; cfi != NULL; cfi = cfi->dw_cfi_next)
1871 output_cfi (cfi, NULL);
1873 /* Pad the CIE out to an address sized boundary. */
1874 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1875 ASM_OUTPUT_LABEL (asm_out_file, l2);
1876 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1877 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1879 fprintf (asm_out_file, "\t%s CIE Length Symbol", ASM_COMMENT_START);
1880 fputc ('\n', asm_out_file);
1883 /* Loop through all of the FDE's. */
1884 for (i = 0; i < fde_table_in_use; ++i)
1886 fde = &fde_table[i];
1888 /* Don't emit EH unwind info for leaf functions. */
1889 if (for_eh && fde->nothrow)
1892 ASM_GENERATE_INTERNAL_LABEL (l1, FDE_AFTER_SIZE_LABEL, for_eh + i * 2);
1893 ASM_GENERATE_INTERNAL_LABEL (l2, FDE_END_LABEL, for_eh + i * 2);
1894 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1895 ASM_GENERATE_INTERNAL_LABEL (ld, FDE_LENGTH_LABEL, for_eh + i * 2);
1897 ASM_OUTPUT_DWARF_OFFSET4 (asm_out_file, ld);
1899 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, ld);
1902 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l2, l1);
1904 ASM_OUTPUT_DWARF_DELTA (asm_out_file, l2, l1);
1907 fprintf (asm_out_file, "\t%s FDE Length", ASM_COMMENT_START);
1908 fputc ('\n', asm_out_file);
1909 ASM_OUTPUT_LABEL (asm_out_file, l1);
1911 /* ??? This always emits a 4 byte offset when for_eh is true, but it
1912 emits a target dependent sized offset when for_eh is not true.
1913 This inconsistency may confuse gdb. The only case where we need a
1914 non-4 byte offset is for the Irix6 N64 ABI, so we may lose SGI
1915 compatibility if we emit a 4 byte offset. We need a 4 byte offset
1916 though in order to be compatible with the dwarf_fde struct in frame.c.
1917 If the for_eh case is changed, then the struct in frame.c has
1918 to be adjusted appropriately. */
1920 ASM_OUTPUT_DWARF_DELTA4 (asm_out_file, l1, "__FRAME_BEGIN__");
1922 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, stripattributes (FRAME_SECTION));
1924 fprintf (asm_out_file, "\t%s FDE CIE offset", ASM_COMMENT_START);
1926 fputc ('\n', asm_out_file);
1927 ASM_OUTPUT_DWARF_ADDR (asm_out_file, fde->dw_fde_begin);
1929 fprintf (asm_out_file, "\t%s FDE initial location", ASM_COMMENT_START);
1931 fputc ('\n', asm_out_file);
1932 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file,
1933 fde->dw_fde_end, fde->dw_fde_begin);
1935 fprintf (asm_out_file, "\t%s FDE address range", ASM_COMMENT_START);
1937 fputc ('\n', asm_out_file);
1939 /* Loop through the Call Frame Instructions associated with
1941 fde->dw_fde_current_label = fde->dw_fde_begin;
1942 for (cfi = fde->dw_fde_cfi; cfi != NULL; cfi = cfi->dw_cfi_next)
1943 output_cfi (cfi, fde);
1945 /* Pad the FDE out to an address sized boundary. */
1946 ASM_OUTPUT_ALIGN (asm_out_file, floor_log2 (DWARF2_ADDR_SIZE));
1947 ASM_OUTPUT_LABEL (asm_out_file, l2);
1948 #ifdef ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL
1949 ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL (asm_out_file, ld, l2, l1);
1951 fprintf (asm_out_file, "\t%s FDE Length Symbol", ASM_COMMENT_START);
1952 fputc ('\n', asm_out_file);
1955 #ifndef EH_FRAME_SECTION
1958 /* Emit terminating zero for table. */
1959 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, 0);
1960 fputc ('\n', asm_out_file);
1963 #ifdef MIPS_DEBUGGING_INFO
1964 /* Work around Irix 6 assembler bug whereby labels at the end of a section
1965 get a value of 0. Putting .align 0 after the label fixes it. */
1966 ASM_OUTPUT_ALIGN (asm_out_file, 0);
1969 /* Turn off app to make assembly quicker. */
1974 /* Output a marker (i.e. a label) for the beginning of a function, before
1978 dwarf2out_begin_prologue ()
1980 char label[MAX_ARTIFICIAL_LABEL_BYTES];
1981 register dw_fde_ref fde;
1983 ++current_funcdef_number;
1985 function_section (current_function_decl);
1986 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_BEGIN_LABEL,
1987 current_funcdef_number);
1988 ASM_OUTPUT_LABEL (asm_out_file, label);
1989 current_function_func_begin_label = get_identifier (label);
1991 /* Expand the fde table if necessary. */
1992 if (fde_table_in_use == fde_table_allocated)
1994 fde_table_allocated += FDE_TABLE_INCREMENT;
1996 = (dw_fde_ref) xrealloc (fde_table,
1997 fde_table_allocated * sizeof (dw_fde_node));
2000 /* Record the FDE associated with this function. */
2001 current_funcdef_fde = fde_table_in_use;
2003 /* Add the new FDE at the end of the fde_table. */
2004 fde = &fde_table[fde_table_in_use++];
2005 fde->dw_fde_begin = xstrdup (label);
2006 fde->dw_fde_current_label = NULL;
2007 fde->dw_fde_end = NULL;
2008 fde->dw_fde_cfi = NULL;
2009 fde->nothrow = current_function_nothrow;
2011 args_size = old_args_size = 0;
2014 /* Output a marker (i.e. a label) for the absolute end of the generated code
2015 for a function definition. This gets called *after* the epilogue code has
2019 dwarf2out_end_epilogue ()
2022 char label[MAX_ARTIFICIAL_LABEL_BYTES];
2024 /* Output a label to mark the endpoint of the code generated for this
2026 ASM_GENERATE_INTERNAL_LABEL (label, FUNC_END_LABEL, current_funcdef_number);
2027 ASM_OUTPUT_LABEL (asm_out_file, label);
2028 fde = &fde_table[fde_table_in_use - 1];
2029 fde->dw_fde_end = xstrdup (label);
2033 dwarf2out_frame_init ()
2035 /* Allocate the initial hunk of the fde_table. */
2036 fde_table = (dw_fde_ref) xcalloc (FDE_TABLE_INCREMENT, sizeof (dw_fde_node));
2037 fde_table_allocated = FDE_TABLE_INCREMENT;
2038 fde_table_in_use = 0;
2040 /* Generate the CFA instructions common to all FDE's. Do it now for the
2041 sake of lookup_cfa. */
2043 #ifdef DWARF2_UNWIND_INFO
2044 /* On entry, the Canonical Frame Address is at SP. */
2045 dwarf2out_def_cfa (NULL, STACK_POINTER_REGNUM, INCOMING_FRAME_SP_OFFSET);
2046 initial_return_save (INCOMING_RETURN_ADDR_RTX);
2051 dwarf2out_frame_finish ()
2053 /* Output call frame information. */
2054 #ifdef MIPS_DEBUGGING_INFO
2055 if (write_symbols == DWARF2_DEBUG)
2056 output_call_frame_info (0);
2057 if (flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp))
2058 output_call_frame_info (1);
2060 if (write_symbols == DWARF2_DEBUG
2061 || flag_unwind_tables || (flag_exceptions && ! exceptions_via_longjmp))
2062 output_call_frame_info (1);
2066 /* And now, the subset of the debugging information support code necessary
2067 for emitting location expressions. */
2069 typedef struct dw_val_struct *dw_val_ref;
2070 typedef struct die_struct *dw_die_ref;
2071 typedef struct dw_loc_descr_struct *dw_loc_descr_ref;
2073 /* Each DIE may have a series of attribute/value pairs. Values
2074 can take on several forms. The forms that are used in this
2075 implementation are listed below. */
2082 dw_val_class_unsigned_const,
2083 dw_val_class_long_long,
2086 dw_val_class_die_ref,
2087 dw_val_class_fde_ref,
2088 dw_val_class_lbl_id,
2089 dw_val_class_lbl_offset,
2094 /* Describe a double word constant value. */
2095 /* ??? Every instance of long_long in the code really means CONST_DOUBLE. */
2097 typedef struct dw_long_long_struct
2104 /* Describe a floating point constant value. */
2106 typedef struct dw_fp_struct
2113 /* The dw_val_node describes an attribute's value, as it is
2114 represented internally. */
2116 typedef struct dw_val_struct
2118 dw_val_class val_class;
2122 dw_loc_descr_ref val_loc;
2124 long unsigned val_unsigned;
2125 dw_long_long_const val_long_long;
2126 dw_float_const val_float;
2127 dw_die_ref val_die_ref;
2128 unsigned val_fde_index;
2131 unsigned char val_flag;
2137 /* Locations in memory are described using a sequence of stack machine
2140 typedef struct dw_loc_descr_struct
2142 dw_loc_descr_ref dw_loc_next;
2143 enum dwarf_location_atom dw_loc_opc;
2144 dw_val_node dw_loc_oprnd1;
2145 dw_val_node dw_loc_oprnd2;
2149 static const char *dwarf_stack_op_name PARAMS ((unsigned));
2150 static dw_loc_descr_ref new_loc_descr PARAMS ((enum dwarf_location_atom,
2153 static void add_loc_descr PARAMS ((dw_loc_descr_ref *,
2155 static unsigned long size_of_loc_descr PARAMS ((dw_loc_descr_ref));
2156 static unsigned long size_of_locs PARAMS ((dw_loc_descr_ref));
2157 static void output_loc_operands PARAMS ((dw_loc_descr_ref));
2158 static void output_loc_sequence PARAMS ((dw_loc_descr_ref));
2160 /* Convert a DWARF stack opcode into its string name. */
2163 dwarf_stack_op_name (op)
2164 register unsigned op;
2169 return "DW_OP_addr";
2171 return "DW_OP_deref";
2173 return "DW_OP_const1u";
2175 return "DW_OP_const1s";
2177 return "DW_OP_const2u";
2179 return "DW_OP_const2s";
2181 return "DW_OP_const4u";
2183 return "DW_OP_const4s";
2185 return "DW_OP_const8u";
2187 return "DW_OP_const8s";
2189 return "DW_OP_constu";
2191 return "DW_OP_consts";
2195 return "DW_OP_drop";
2197 return "DW_OP_over";
2199 return "DW_OP_pick";
2201 return "DW_OP_swap";
2205 return "DW_OP_xderef";
2213 return "DW_OP_minus";
2225 return "DW_OP_plus";
2226 case DW_OP_plus_uconst:
2227 return "DW_OP_plus_uconst";
2233 return "DW_OP_shra";
2251 return "DW_OP_skip";
2253 return "DW_OP_lit0";
2255 return "DW_OP_lit1";
2257 return "DW_OP_lit2";
2259 return "DW_OP_lit3";
2261 return "DW_OP_lit4";
2263 return "DW_OP_lit5";
2265 return "DW_OP_lit6";
2267 return "DW_OP_lit7";
2269 return "DW_OP_lit8";
2271 return "DW_OP_lit9";
2273 return "DW_OP_lit10";
2275 return "DW_OP_lit11";
2277 return "DW_OP_lit12";
2279 return "DW_OP_lit13";
2281 return "DW_OP_lit14";
2283 return "DW_OP_lit15";
2285 return "DW_OP_lit16";
2287 return "DW_OP_lit17";
2289 return "DW_OP_lit18";
2291 return "DW_OP_lit19";
2293 return "DW_OP_lit20";
2295 return "DW_OP_lit21";
2297 return "DW_OP_lit22";
2299 return "DW_OP_lit23";
2301 return "DW_OP_lit24";
2303 return "DW_OP_lit25";
2305 return "DW_OP_lit26";
2307 return "DW_OP_lit27";
2309 return "DW_OP_lit28";
2311 return "DW_OP_lit29";
2313 return "DW_OP_lit30";
2315 return "DW_OP_lit31";
2317 return "DW_OP_reg0";
2319 return "DW_OP_reg1";
2321 return "DW_OP_reg2";
2323 return "DW_OP_reg3";
2325 return "DW_OP_reg4";
2327 return "DW_OP_reg5";
2329 return "DW_OP_reg6";
2331 return "DW_OP_reg7";
2333 return "DW_OP_reg8";
2335 return "DW_OP_reg9";
2337 return "DW_OP_reg10";
2339 return "DW_OP_reg11";
2341 return "DW_OP_reg12";
2343 return "DW_OP_reg13";
2345 return "DW_OP_reg14";
2347 return "DW_OP_reg15";
2349 return "DW_OP_reg16";
2351 return "DW_OP_reg17";
2353 return "DW_OP_reg18";
2355 return "DW_OP_reg19";
2357 return "DW_OP_reg20";
2359 return "DW_OP_reg21";
2361 return "DW_OP_reg22";
2363 return "DW_OP_reg23";
2365 return "DW_OP_reg24";
2367 return "DW_OP_reg25";
2369 return "DW_OP_reg26";
2371 return "DW_OP_reg27";
2373 return "DW_OP_reg28";
2375 return "DW_OP_reg29";
2377 return "DW_OP_reg30";
2379 return "DW_OP_reg31";
2381 return "DW_OP_breg0";
2383 return "DW_OP_breg1";
2385 return "DW_OP_breg2";
2387 return "DW_OP_breg3";
2389 return "DW_OP_breg4";
2391 return "DW_OP_breg5";
2393 return "DW_OP_breg6";
2395 return "DW_OP_breg7";
2397 return "DW_OP_breg8";
2399 return "DW_OP_breg9";
2401 return "DW_OP_breg10";
2403 return "DW_OP_breg11";
2405 return "DW_OP_breg12";
2407 return "DW_OP_breg13";
2409 return "DW_OP_breg14";
2411 return "DW_OP_breg15";
2413 return "DW_OP_breg16";
2415 return "DW_OP_breg17";
2417 return "DW_OP_breg18";
2419 return "DW_OP_breg19";
2421 return "DW_OP_breg20";
2423 return "DW_OP_breg21";
2425 return "DW_OP_breg22";
2427 return "DW_OP_breg23";
2429 return "DW_OP_breg24";
2431 return "DW_OP_breg25";
2433 return "DW_OP_breg26";
2435 return "DW_OP_breg27";
2437 return "DW_OP_breg28";
2439 return "DW_OP_breg29";
2441 return "DW_OP_breg30";
2443 return "DW_OP_breg31";
2445 return "DW_OP_regx";
2447 return "DW_OP_fbreg";
2449 return "DW_OP_bregx";
2451 return "DW_OP_piece";
2452 case DW_OP_deref_size:
2453 return "DW_OP_deref_size";
2454 case DW_OP_xderef_size:
2455 return "DW_OP_xderef_size";
2459 return "OP_<unknown>";
2463 /* Return a pointer to a newly allocated location description. Location
2464 descriptions are simple expression terms that can be strung
2465 together to form more complicated location (address) descriptions. */
2467 static inline dw_loc_descr_ref
2468 new_loc_descr (op, oprnd1, oprnd2)
2469 register enum dwarf_location_atom op;
2470 register unsigned long oprnd1;
2471 register unsigned long oprnd2;
2473 register dw_loc_descr_ref descr
2474 = (dw_loc_descr_ref) xmalloc (sizeof (dw_loc_descr_node));
2476 descr->dw_loc_next = NULL;
2477 descr->dw_loc_opc = op;
2478 descr->dw_loc_oprnd1.val_class = dw_val_class_unsigned_const;
2479 descr->dw_loc_oprnd1.v.val_unsigned = oprnd1;
2480 descr->dw_loc_oprnd2.val_class = dw_val_class_unsigned_const;
2481 descr->dw_loc_oprnd2.v.val_unsigned = oprnd2;
2486 /* Add a location description term to a location description expression. */
2489 add_loc_descr (list_head, descr)
2490 register dw_loc_descr_ref *list_head;
2491 register dw_loc_descr_ref descr;
2493 register dw_loc_descr_ref *d;
2495 /* Find the end of the chain. */
2496 for (d = list_head; (*d) != NULL; d = &(*d)->dw_loc_next)
2502 /* Return the size of a location descriptor. */
2504 static unsigned long
2505 size_of_loc_descr (loc)
2506 register dw_loc_descr_ref loc;
2508 register unsigned long size = 1;
2510 switch (loc->dw_loc_opc)
2513 size += DWARF2_ADDR_SIZE;
2532 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2535 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2540 case DW_OP_plus_uconst:
2541 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2579 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2582 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2585 size += size_of_sleb128 (loc->dw_loc_oprnd1.v.val_int);
2588 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2589 size += size_of_sleb128 (loc->dw_loc_oprnd2.v.val_int);
2592 size += size_of_uleb128 (loc->dw_loc_oprnd1.v.val_unsigned);
2594 case DW_OP_deref_size:
2595 case DW_OP_xderef_size:
2605 /* Return the size of a series of location descriptors. */
2607 static unsigned long
2609 register dw_loc_descr_ref loc;
2611 register unsigned long size = 0;
2613 for (; loc != NULL; loc = loc->dw_loc_next)
2614 size += size_of_loc_descr (loc);
2619 /* Output location description stack opcode's operands (if any). */
2622 output_loc_operands (loc)
2623 register dw_loc_descr_ref loc;
2625 register dw_val_ref val1 = &loc->dw_loc_oprnd1;
2626 register dw_val_ref val2 = &loc->dw_loc_oprnd2;
2628 switch (loc->dw_loc_opc)
2630 #ifdef DWARF2_DEBUGGING_INFO
2632 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, val1->v.val_addr);
2633 fputc ('\n', asm_out_file);
2637 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
2638 fputc ('\n', asm_out_file);
2642 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, val1->v.val_int);
2643 fputc ('\n', asm_out_file);
2648 fputc ('\n', asm_out_file);
2652 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, val1->v.val_int);
2653 fputc ('\n', asm_out_file);
2665 /* We currently don't make any attempt to make sure these are
2666 aligned properly like we do for the main unwind info, so
2667 don't support emitting things larger than a byte if we're
2668 only doing unwinding. */
2673 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
2674 fputc ('\n', asm_out_file);
2677 output_uleb128 (val1->v.val_unsigned);
2678 fputc ('\n', asm_out_file);
2681 output_sleb128 (val1->v.val_int);
2682 fputc ('\n', asm_out_file);
2685 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_int);
2686 fputc ('\n', asm_out_file);
2688 case DW_OP_plus_uconst:
2689 output_uleb128 (val1->v.val_unsigned);
2690 fputc ('\n', asm_out_file);
2724 output_sleb128 (val1->v.val_int);
2725 fputc ('\n', asm_out_file);
2728 output_uleb128 (val1->v.val_unsigned);
2729 fputc ('\n', asm_out_file);
2732 output_sleb128 (val1->v.val_int);
2733 fputc ('\n', asm_out_file);
2736 output_uleb128 (val1->v.val_unsigned);
2737 fputc ('\n', asm_out_file);
2738 output_sleb128 (val2->v.val_int);
2739 fputc ('\n', asm_out_file);
2742 output_uleb128 (val1->v.val_unsigned);
2743 fputc ('\n', asm_out_file);
2745 case DW_OP_deref_size:
2746 case DW_OP_xderef_size:
2747 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, val1->v.val_flag);
2748 fputc ('\n', asm_out_file);
2751 /* Other codes have no operands. */
2756 /* Output a sequence of location operations. */
2759 output_loc_sequence (loc)
2760 dw_loc_descr_ref loc;
2762 for (; loc != NULL; loc = loc->dw_loc_next)
2764 /* Output the opcode. */
2765 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, loc->dw_loc_opc);
2767 fprintf (asm_out_file, "\t%s %s", ASM_COMMENT_START,
2768 dwarf_stack_op_name (loc->dw_loc_opc));
2770 fputc ('\n', asm_out_file);
2772 /* Output the operand(s) (if any). */
2773 output_loc_operands (loc);
2777 /* This routine will generate the correct assembly data for a location
2778 description based on a cfi entry with a complex address. */
2781 output_cfa_loc (cfi)
2784 dw_loc_descr_ref loc;
2787 /* Output the size of the block. */
2788 loc = cfi->dw_cfi_oprnd1.dw_cfi_loc;
2789 size = size_of_locs (loc);
2790 output_uleb128 (size);
2791 fputc ('\n', asm_out_file);
2793 /* Now output the operations themselves. */
2794 output_loc_sequence (loc);
2797 /* This function builds a dwarf location descriptor seqeunce from
2798 a dw_cfa_location. */
2800 static struct dw_loc_descr_struct *
2802 dw_cfa_location *cfa;
2804 struct dw_loc_descr_struct *head, *tmp;
2806 if (cfa->indirect == 0)
2809 if (cfa->base_offset)
2810 head = new_loc_descr (DW_OP_breg0 + cfa->reg, cfa->base_offset, 0);
2812 head = new_loc_descr (DW_OP_reg0 + cfa->reg, 0, 0);
2813 head->dw_loc_oprnd1.val_class = dw_val_class_const;
2814 tmp = new_loc_descr (DW_OP_deref, 0, 0);
2815 add_loc_descr (&head, tmp);
2816 if (cfa->offset != 0)
2818 tmp = new_loc_descr (DW_OP_plus_uconst, cfa->offset, 0);
2819 add_loc_descr (&head, tmp);
2824 /* This function fills in aa dw_cfa_location structure from a
2825 dwarf location descriptor sequence. */
2828 get_cfa_from_loc_descr (cfa, loc)
2829 dw_cfa_location *cfa;
2830 struct dw_loc_descr_struct *loc;
2832 struct dw_loc_descr_struct *ptr;
2834 cfa->base_offset = 0;
2838 for (ptr = loc; ptr != NULL; ptr = ptr->dw_loc_next)
2840 enum dwarf_location_atom op = ptr->dw_loc_opc;
2875 cfa->reg = op - DW_OP_reg0;
2878 cfa->reg = ptr->dw_loc_oprnd1.v.val_int;
2912 cfa->reg = op - DW_OP_breg0;
2913 cfa->base_offset = ptr->dw_loc_oprnd1.v.val_int;
2916 cfa->reg = ptr->dw_loc_oprnd1.v.val_int;
2917 cfa->base_offset = ptr->dw_loc_oprnd2.v.val_int;
2922 case DW_OP_plus_uconst:
2923 cfa->offset = ptr->dw_loc_oprnd1.v.val_unsigned;
2926 fatal ("DW_LOC_OP %s not implememnted yet.\n",
2927 dwarf_stack_op_name (ptr->dw_loc_opc));
2931 #endif /* .debug_frame support */
2933 /* And now, the support for symbolic debugging information. */
2934 #ifdef DWARF2_DEBUGGING_INFO
2936 /* NOTE: In the comments in this file, many references are made to
2937 "Debugging Information Entries". This term is abbreviated as `DIE'
2938 throughout the remainder of this file. */
2940 /* An internal representation of the DWARF output is built, and then
2941 walked to generate the DWARF debugging info. The walk of the internal
2942 representation is done after the entire program has been compiled.
2943 The types below are used to describe the internal representation. */
2945 /* Various DIE's use offsets relative to the beginning of the
2946 .debug_info section to refer to each other. */
2948 typedef long int dw_offset;
2950 /* Define typedefs here to avoid circular dependencies. */
2952 typedef struct dw_attr_struct *dw_attr_ref;
2953 typedef struct dw_line_info_struct *dw_line_info_ref;
2954 typedef struct dw_separate_line_info_struct *dw_separate_line_info_ref;
2955 typedef struct pubname_struct *pubname_ref;
2956 typedef dw_die_ref *arange_ref;
2958 /* Each entry in the line_info_table maintains the file and
2959 line number associated with the label generated for that
2960 entry. The label gives the PC value associated with
2961 the line number entry. */
2963 typedef struct dw_line_info_struct
2965 unsigned long dw_file_num;
2966 unsigned long dw_line_num;
2970 /* Line information for functions in separate sections; each one gets its
2972 typedef struct dw_separate_line_info_struct
2974 unsigned long dw_file_num;
2975 unsigned long dw_line_num;
2976 unsigned long function;
2978 dw_separate_line_info_entry;
2980 /* Each DIE attribute has a field specifying the attribute kind,
2981 a link to the next attribute in the chain, and an attribute value.
2982 Attributes are typically linked below the DIE they modify. */
2984 typedef struct dw_attr_struct
2986 enum dwarf_attribute dw_attr;
2987 dw_attr_ref dw_attr_next;
2988 dw_val_node dw_attr_val;
2992 /* The Debugging Information Entry (DIE) structure */
2994 typedef struct die_struct
2996 enum dwarf_tag die_tag;
2997 dw_attr_ref die_attr;
2998 dw_die_ref die_parent;
2999 dw_die_ref die_child;
3001 dw_offset die_offset;
3002 unsigned long die_abbrev;
3006 /* The pubname structure */
3008 typedef struct pubname_struct
3015 /* The limbo die list structure. */
3016 typedef struct limbo_die_struct
3019 struct limbo_die_struct *next;
3023 /* How to start an assembler comment. */
3024 #ifndef ASM_COMMENT_START
3025 #define ASM_COMMENT_START ";#"
3028 /* Define a macro which returns non-zero for a TYPE_DECL which was
3029 implicitly generated for a tagged type.
3031 Note that unlike the gcc front end (which generates a NULL named
3032 TYPE_DECL node for each complete tagged type, each array type, and
3033 each function type node created) the g++ front end generates a
3034 _named_ TYPE_DECL node for each tagged type node created.
3035 These TYPE_DECLs have DECL_ARTIFICIAL set, so we know not to
3036 generate a DW_TAG_typedef DIE for them. */
3038 #define TYPE_DECL_IS_STUB(decl) \
3039 (DECL_NAME (decl) == NULL_TREE \
3040 || (DECL_ARTIFICIAL (decl) \
3041 && is_tagged_type (TREE_TYPE (decl)) \
3042 && ((decl == TYPE_STUB_DECL (TREE_TYPE (decl))) \
3043 /* This is necessary for stub decls that \
3044 appear in nested inline functions. */ \
3045 || (DECL_ABSTRACT_ORIGIN (decl) != NULL_TREE \
3046 && (decl_ultimate_origin (decl) \
3047 == TYPE_STUB_DECL (TREE_TYPE (decl)))))))
3049 /* Information concerning the compilation unit's programming
3050 language, and compiler version. */
3052 extern int flag_traditional;
3054 /* Fixed size portion of the DWARF compilation unit header. */
3055 #define DWARF_COMPILE_UNIT_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 3)
3057 /* Fixed size portion of debugging line information prolog. */
3058 #define DWARF_LINE_PROLOG_HEADER_SIZE 5
3060 /* Fixed size portion of public names info. */
3061 #define DWARF_PUBNAMES_HEADER_SIZE (2 * DWARF_OFFSET_SIZE + 2)
3063 /* Fixed size portion of the address range info. */
3064 #define DWARF_ARANGES_HEADER_SIZE \
3065 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \
3066 - DWARF_OFFSET_SIZE)
3068 /* Size of padding portion in the address range info. It must be
3069 aligned to twice the pointer size. */
3070 #define DWARF_ARANGES_PAD_SIZE \
3071 (DWARF_ROUND (2 * DWARF_OFFSET_SIZE + 4, DWARF2_ADDR_SIZE * 2) \
3072 - (2 * DWARF_OFFSET_SIZE + 4))
3074 /* The default is to have gcc emit the line number tables. */
3075 #ifndef DWARF2_ASM_LINE_DEBUG_INFO
3076 #define DWARF2_ASM_LINE_DEBUG_INFO 0
3079 /* Define the architecture-dependent minimum instruction length (in bytes).
3080 In this implementation of DWARF, this field is used for information
3081 purposes only. Since GCC generates assembly language, we have
3082 no a priori knowledge of how many instruction bytes are generated
3083 for each source line, and therefore can use only the DW_LNE_set_address
3084 and DW_LNS_fixed_advance_pc line information commands. */
3086 #ifndef DWARF_LINE_MIN_INSTR_LENGTH
3087 #define DWARF_LINE_MIN_INSTR_LENGTH 4
3090 /* Minimum line offset in a special line info. opcode.
3091 This value was chosen to give a reasonable range of values. */
3092 #define DWARF_LINE_BASE -10
3094 /* First special line opcde - leave room for the standard opcodes. */
3095 #define DWARF_LINE_OPCODE_BASE 10
3097 /* Range of line offsets in a special line info. opcode. */
3098 #define DWARF_LINE_RANGE (254-DWARF_LINE_OPCODE_BASE+1)
3100 /* Flag that indicates the initial value of the is_stmt_start flag.
3101 In the present implementation, we do not mark any lines as
3102 the beginning of a source statement, because that information
3103 is not made available by the GCC front-end. */
3104 #define DWARF_LINE_DEFAULT_IS_STMT_START 1
3106 /* This location is used by calc_die_sizes() to keep track
3107 the offset of each DIE within the .debug_info section. */
3108 static unsigned long next_die_offset;
3110 /* Record the root of the DIE's built for the current compilation unit. */
3111 static dw_die_ref comp_unit_die;
3113 /* A list of DIEs with a NULL parent waiting to be relocated. */
3114 static limbo_die_node *limbo_die_list = 0;
3116 /* Pointer to an array of filenames referenced by this compilation unit. */
3117 static char **file_table;
3119 /* Total number of entries in the table (i.e. array) pointed to by
3120 `file_table'. This is the *total* and includes both used and unused
3122 static unsigned file_table_allocated;
3124 /* Number of entries in the file_table which are actually in use. */
3125 static unsigned file_table_in_use;
3127 /* Size (in elements) of increments by which we may expand the filename
3129 #define FILE_TABLE_INCREMENT 64
3131 /* Local pointer to the name of the main input file. Initialized in
3133 static const char *primary_filename;
3135 /* A pointer to the base of a table of references to DIE's that describe
3136 declarations. The table is indexed by DECL_UID() which is a unique
3137 number identifying each decl. */
3138 static dw_die_ref *decl_die_table;
3140 /* Number of elements currently allocated for the decl_die_table. */
3141 static unsigned decl_die_table_allocated;
3143 /* Number of elements in decl_die_table currently in use. */
3144 static unsigned decl_die_table_in_use;
3146 /* Size (in elements) of increments by which we may expand the
3148 #define DECL_DIE_TABLE_INCREMENT 256
3150 /* A pointer to the base of a table of references to declaration
3151 scopes. This table is a display which tracks the nesting
3152 of declaration scopes at the current scope and containing
3153 scopes. This table is used to find the proper place to
3154 define type declaration DIE's. */
3155 static tree *decl_scope_table;
3157 /* Number of elements currently allocated for the decl_scope_table. */
3158 static int decl_scope_table_allocated;
3160 /* Current level of nesting of declaration scopes. */
3161 static int decl_scope_depth;
3163 /* Size (in elements) of increments by which we may expand the
3164 decl_scope_table. */
3165 #define DECL_SCOPE_TABLE_INCREMENT 64
3167 /* A pointer to the base of a list of references to DIE's that
3168 are uniquely identified by their tag, presence/absence of
3169 children DIE's, and list of attribute/value pairs. */
3170 static dw_die_ref *abbrev_die_table;
3172 /* Number of elements currently allocated for abbrev_die_table. */
3173 static unsigned abbrev_die_table_allocated;
3175 /* Number of elements in type_die_table currently in use. */
3176 static unsigned abbrev_die_table_in_use;
3178 /* Size (in elements) of increments by which we may expand the
3179 abbrev_die_table. */
3180 #define ABBREV_DIE_TABLE_INCREMENT 256
3182 /* A pointer to the base of a table that contains line information
3183 for each source code line in .text in the compilation unit. */
3184 static dw_line_info_ref line_info_table;
3186 /* Number of elements currently allocated for line_info_table. */
3187 static unsigned line_info_table_allocated;
3189 /* Number of elements in separate_line_info_table currently in use. */
3190 static unsigned separate_line_info_table_in_use;
3192 /* A pointer to the base of a table that contains line information
3193 for each source code line outside of .text in the compilation unit. */
3194 static dw_separate_line_info_ref separate_line_info_table;
3196 /* Number of elements currently allocated for separate_line_info_table. */
3197 static unsigned separate_line_info_table_allocated;
3199 /* Number of elements in line_info_table currently in use. */
3200 static unsigned line_info_table_in_use;
3202 /* Size (in elements) of increments by which we may expand the
3204 #define LINE_INFO_TABLE_INCREMENT 1024
3206 /* A pointer to the base of a table that contains a list of publicly
3207 accessible names. */
3208 static pubname_ref pubname_table;
3210 /* Number of elements currently allocated for pubname_table. */
3211 static unsigned pubname_table_allocated;
3213 /* Number of elements in pubname_table currently in use. */
3214 static unsigned pubname_table_in_use;
3216 /* Size (in elements) of increments by which we may expand the
3218 #define PUBNAME_TABLE_INCREMENT 64
3220 /* A pointer to the base of a table that contains a list of publicly
3221 accessible names. */
3222 static arange_ref arange_table;
3224 /* Number of elements currently allocated for arange_table. */
3225 static unsigned arange_table_allocated;
3227 /* Number of elements in arange_table currently in use. */
3228 static unsigned arange_table_in_use;
3230 /* Size (in elements) of increments by which we may expand the
3232 #define ARANGE_TABLE_INCREMENT 64
3234 /* A pointer to the base of a list of incomplete types which might be
3235 completed at some later time. */
3237 static tree *incomplete_types_list;
3239 /* Number of elements currently allocated for the incomplete_types_list. */
3240 static unsigned incomplete_types_allocated;
3242 /* Number of elements of incomplete_types_list currently in use. */
3243 static unsigned incomplete_types;
3245 /* Size (in elements) of increments by which we may expand the incomplete
3246 types list. Actually, a single hunk of space of this size should
3247 be enough for most typical programs. */
3248 #define INCOMPLETE_TYPES_INCREMENT 64
3250 /* Record whether the function being analyzed contains inlined functions. */
3251 static int current_function_has_inlines;
3252 #if 0 && defined (MIPS_DEBUGGING_INFO)
3253 static int comp_unit_has_inlines;
3256 /* Array of RTXes referenced by the debugging information, which therefore
3257 must be kept around forever. We do this rather than perform GC on
3258 the dwarf info because almost all of the dwarf info lives forever, and
3259 it's easier to support non-GC frontends this way. */
3260 static varray_type used_rtx_varray;
3262 /* Forward declarations for functions defined in this file. */
3264 static int is_pseudo_reg PARAMS ((rtx));
3265 static tree type_main_variant PARAMS ((tree));
3266 static int is_tagged_type PARAMS ((tree));
3267 static const char *dwarf_tag_name PARAMS ((unsigned));
3268 static const char *dwarf_attr_name PARAMS ((unsigned));
3269 static const char *dwarf_form_name PARAMS ((unsigned));
3271 static const char *dwarf_type_encoding_name PARAMS ((unsigned));
3273 static tree decl_ultimate_origin PARAMS ((tree));
3274 static tree block_ultimate_origin PARAMS ((tree));
3275 static tree decl_class_context PARAMS ((tree));
3276 static void add_dwarf_attr PARAMS ((dw_die_ref, dw_attr_ref));
3277 static void add_AT_flag PARAMS ((dw_die_ref,
3278 enum dwarf_attribute,
3280 static void add_AT_int PARAMS ((dw_die_ref,
3281 enum dwarf_attribute, long));
3282 static void add_AT_unsigned PARAMS ((dw_die_ref,
3283 enum dwarf_attribute,
3285 static void add_AT_long_long PARAMS ((dw_die_ref,
3286 enum dwarf_attribute,
3289 static void add_AT_float PARAMS ((dw_die_ref,
3290 enum dwarf_attribute,
3292 static void add_AT_string PARAMS ((dw_die_ref,
3293 enum dwarf_attribute,
3295 static void add_AT_die_ref PARAMS ((dw_die_ref,
3296 enum dwarf_attribute,
3298 static void add_AT_fde_ref PARAMS ((dw_die_ref,
3299 enum dwarf_attribute,
3301 static void add_AT_loc PARAMS ((dw_die_ref,
3302 enum dwarf_attribute,
3304 static void add_AT_addr PARAMS ((dw_die_ref,
3305 enum dwarf_attribute,
3307 static void add_AT_lbl_id PARAMS ((dw_die_ref,
3308 enum dwarf_attribute,
3310 static void add_AT_lbl_offset PARAMS ((dw_die_ref,
3311 enum dwarf_attribute,
3313 static dw_attr_ref get_AT PARAMS ((dw_die_ref,
3314 enum dwarf_attribute));
3315 static const char *get_AT_low_pc PARAMS ((dw_die_ref));
3316 static const char *get_AT_hi_pc PARAMS ((dw_die_ref));
3317 static const char *get_AT_string PARAMS ((dw_die_ref,
3318 enum dwarf_attribute));
3319 static int get_AT_flag PARAMS ((dw_die_ref,
3320 enum dwarf_attribute));
3321 static unsigned get_AT_unsigned PARAMS ((dw_die_ref,
3322 enum dwarf_attribute));
3323 static inline dw_die_ref get_AT_ref PARAMS ((dw_die_ref,
3324 enum dwarf_attribute));
3325 static int is_c_family PARAMS ((void));
3326 static int is_java PARAMS ((void));
3327 static int is_fortran PARAMS ((void));
3328 static void remove_AT PARAMS ((dw_die_ref,
3329 enum dwarf_attribute));
3330 static void remove_children PARAMS ((dw_die_ref));
3331 static void add_child_die PARAMS ((dw_die_ref, dw_die_ref));
3332 static dw_die_ref new_die PARAMS ((enum dwarf_tag, dw_die_ref));
3333 static dw_die_ref lookup_type_die PARAMS ((tree));
3334 static void equate_type_number_to_die PARAMS ((tree, dw_die_ref));
3335 static dw_die_ref lookup_decl_die PARAMS ((tree));
3336 static void equate_decl_number_to_die PARAMS ((tree, dw_die_ref));
3337 static void print_spaces PARAMS ((FILE *));
3338 static void print_die PARAMS ((dw_die_ref, FILE *));
3339 static void print_dwarf_line_table PARAMS ((FILE *));
3340 static void add_sibling_attributes PARAMS ((dw_die_ref));
3341 static void build_abbrev_table PARAMS ((dw_die_ref));
3342 static unsigned long size_of_string PARAMS ((const char *));
3343 static int constant_size PARAMS ((long unsigned));
3344 static unsigned long size_of_die PARAMS ((dw_die_ref));
3345 static void calc_die_sizes PARAMS ((dw_die_ref));
3346 static unsigned long size_of_line_prolog PARAMS ((void));
3347 static unsigned long size_of_pubnames PARAMS ((void));
3348 static unsigned long size_of_aranges PARAMS ((void));
3349 static enum dwarf_form value_format PARAMS ((dw_attr_ref));
3350 static void output_value_format PARAMS ((dw_attr_ref));
3351 static void output_abbrev_section PARAMS ((void));
3352 static void output_die PARAMS ((dw_die_ref));
3353 static void output_compilation_unit_header PARAMS ((void));
3354 static const char *dwarf2_name PARAMS ((tree, int));
3355 static void add_pubname PARAMS ((tree, dw_die_ref));
3356 static void output_pubnames PARAMS ((void));
3357 static void add_arange PARAMS ((tree, dw_die_ref));
3358 static void output_aranges PARAMS ((void));
3359 static void output_line_info PARAMS ((void));
3360 static dw_die_ref base_type_die PARAMS ((tree));
3361 static tree root_type PARAMS ((tree));
3362 static int is_base_type PARAMS ((tree));
3363 static dw_die_ref modified_type_die PARAMS ((tree, int, int, dw_die_ref));
3364 static int type_is_enum PARAMS ((tree));
3365 static unsigned int reg_number PARAMS ((rtx));
3366 static dw_loc_descr_ref reg_loc_descriptor PARAMS ((rtx));
3367 static dw_loc_descr_ref based_loc_descr PARAMS ((unsigned, long));
3368 static int is_based_loc PARAMS ((rtx));
3369 static dw_loc_descr_ref mem_loc_descriptor PARAMS ((rtx, enum machine_mode mode));
3370 static dw_loc_descr_ref concat_loc_descriptor PARAMS ((rtx, rtx));
3371 static dw_loc_descr_ref loc_descriptor PARAMS ((rtx));
3372 static HOST_WIDE_INT ceiling PARAMS ((HOST_WIDE_INT, unsigned int));
3373 static tree field_type PARAMS ((tree));
3374 static unsigned int simple_type_align_in_bits PARAMS ((tree));
3375 static unsigned HOST_WIDE_INT simple_type_size_in_bits PARAMS ((tree));
3376 static HOST_WIDE_INT field_byte_offset PARAMS ((tree));
3377 static void add_AT_location_description PARAMS ((dw_die_ref,
3378 enum dwarf_attribute, rtx));
3379 static void add_data_member_location_attribute PARAMS ((dw_die_ref, tree));
3380 static void add_const_value_attribute PARAMS ((dw_die_ref, rtx));
3381 static void add_location_or_const_value_attribute PARAMS ((dw_die_ref, tree));
3382 static void add_name_attribute PARAMS ((dw_die_ref, const char *));
3383 static void add_bound_info PARAMS ((dw_die_ref,
3384 enum dwarf_attribute, tree));
3385 static void add_subscript_info PARAMS ((dw_die_ref, tree));
3386 static void add_byte_size_attribute PARAMS ((dw_die_ref, tree));
3387 static void add_bit_offset_attribute PARAMS ((dw_die_ref, tree));
3388 static void add_bit_size_attribute PARAMS ((dw_die_ref, tree));
3389 static void add_prototyped_attribute PARAMS ((dw_die_ref, tree));
3390 static void add_abstract_origin_attribute PARAMS ((dw_die_ref, tree));
3391 static void add_pure_or_virtual_attribute PARAMS ((dw_die_ref, tree));
3392 static void add_src_coords_attributes PARAMS ((dw_die_ref, tree));
3393 static void add_name_and_src_coords_attributes PARAMS ((dw_die_ref, tree));
3394 static void push_decl_scope PARAMS ((tree));
3395 static dw_die_ref scope_die_for PARAMS ((tree, dw_die_ref));
3396 static void pop_decl_scope PARAMS ((void));
3397 static void add_type_attribute PARAMS ((dw_die_ref, tree, int, int,
3399 static const char *type_tag PARAMS ((tree));
3400 static tree member_declared_type PARAMS ((tree));
3402 static const char *decl_start_label PARAMS ((tree));
3404 static void gen_array_type_die PARAMS ((tree, dw_die_ref));
3405 static void gen_set_type_die PARAMS ((tree, dw_die_ref));
3407 static void gen_entry_point_die PARAMS ((tree, dw_die_ref));
3409 static void gen_inlined_enumeration_type_die PARAMS ((tree, dw_die_ref));
3410 static void gen_inlined_structure_type_die PARAMS ((tree, dw_die_ref));
3411 static void gen_inlined_union_type_die PARAMS ((tree, dw_die_ref));
3412 static void gen_enumeration_type_die PARAMS ((tree, dw_die_ref));
3413 static dw_die_ref gen_formal_parameter_die PARAMS ((tree, dw_die_ref));
3414 static void gen_unspecified_parameters_die PARAMS ((tree, dw_die_ref));
3415 static void gen_formal_types_die PARAMS ((tree, dw_die_ref));
3416 static void gen_subprogram_die PARAMS ((tree, dw_die_ref));
3417 static void gen_variable_die PARAMS ((tree, dw_die_ref));
3418 static void gen_label_die PARAMS ((tree, dw_die_ref));
3419 static void gen_lexical_block_die PARAMS ((tree, dw_die_ref, int));
3420 static void gen_inlined_subroutine_die PARAMS ((tree, dw_die_ref, int));
3421 static void gen_field_die PARAMS ((tree, dw_die_ref));
3422 static void gen_ptr_to_mbr_type_die PARAMS ((tree, dw_die_ref));
3423 static dw_die_ref gen_compile_unit_die PARAMS ((const char *));
3424 static void gen_string_type_die PARAMS ((tree, dw_die_ref));
3425 static void gen_inheritance_die PARAMS ((tree, dw_die_ref));
3426 static void gen_member_die PARAMS ((tree, dw_die_ref));
3427 static void gen_struct_or_union_type_die PARAMS ((tree, dw_die_ref));
3428 static void gen_subroutine_type_die PARAMS ((tree, dw_die_ref));
3429 static void gen_typedef_die PARAMS ((tree, dw_die_ref));
3430 static void gen_type_die PARAMS ((tree, dw_die_ref));
3431 static void gen_tagged_type_instantiation_die PARAMS ((tree, dw_die_ref));
3432 static void gen_block_die PARAMS ((tree, dw_die_ref, int));
3433 static void decls_for_scope PARAMS ((tree, dw_die_ref, int));
3434 static int is_redundant_typedef PARAMS ((tree));
3435 static void gen_decl_die PARAMS ((tree, dw_die_ref));
3436 static unsigned lookup_filename PARAMS ((const char *));
3437 static void add_incomplete_type PARAMS ((tree));
3438 static void retry_incomplete_types PARAMS ((void));
3439 static void gen_type_die_for_member PARAMS ((tree, tree, dw_die_ref));
3440 static void gen_abstract_function PARAMS ((tree));
3441 static rtx save_rtx PARAMS ((rtx));
3442 static void splice_child_die PARAMS ((dw_die_ref, dw_die_ref));
3443 static void reverse_die_lists PARAMS ((dw_die_ref));
3445 /* Section names used to hold DWARF debugging information. */
3446 #ifndef DEBUG_INFO_SECTION
3447 #define DEBUG_INFO_SECTION ".debug_info"
3449 #ifndef ABBREV_SECTION
3450 #define ABBREV_SECTION ".debug_abbrev"
3452 #ifndef ARANGES_SECTION
3453 #define ARANGES_SECTION ".debug_aranges"
3455 #ifndef DW_MACINFO_SECTION
3456 #define DW_MACINFO_SECTION ".debug_macinfo"
3458 #ifndef DEBUG_LINE_SECTION
3459 #define DEBUG_LINE_SECTION ".debug_line"
3462 #define LOC_SECTION ".debug_loc"
3464 #ifndef PUBNAMES_SECTION
3465 #define PUBNAMES_SECTION ".debug_pubnames"
3468 #define STR_SECTION ".debug_str"
3471 /* Standard ELF section names for compiled code and data. */
3472 #ifndef TEXT_SECTION
3473 #define TEXT_SECTION ".text"
3475 #ifndef DATA_SECTION
3476 #define DATA_SECTION ".data"
3479 #define BSS_SECTION ".bss"
3482 /* Labels we insert at beginning sections we can reference instead of
3483 the section names themselves. */
3485 #ifndef TEXT_SECTION_LABEL
3486 #define TEXT_SECTION_LABEL "Ltext"
3488 #ifndef DEBUG_LINE_SECTION_LABEL
3489 #define DEBUG_LINE_SECTION_LABEL "Ldebug_line"
3491 #ifndef DEBUG_INFO_SECTION_LABEL
3492 #define DEBUG_INFO_SECTION_LABEL "Ldebug_info"
3494 #ifndef ABBREV_SECTION_LABEL
3495 #define ABBREV_SECTION_LABEL "Ldebug_abbrev"
3498 /* Definitions of defaults for formats and names of various special
3499 (artificial) labels which may be generated within this file (when the -g
3500 options is used and DWARF_DEBUGGING_INFO is in effect.
3501 If necessary, these may be overridden from within the tm.h file, but
3502 typically, overriding these defaults is unnecessary. */
3504 static char text_end_label[MAX_ARTIFICIAL_LABEL_BYTES];
3505 static char text_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3506 static char abbrev_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3507 static char debug_info_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3508 static char debug_line_section_label[MAX_ARTIFICIAL_LABEL_BYTES];
3510 #ifndef TEXT_END_LABEL
3511 #define TEXT_END_LABEL "Letext"
3513 #ifndef DATA_END_LABEL
3514 #define DATA_END_LABEL "Ledata"
3516 #ifndef BSS_END_LABEL
3517 #define BSS_END_LABEL "Lebss"
3519 #ifndef INSN_LABEL_FMT
3520 #define INSN_LABEL_FMT "LI%u_"
3522 #ifndef BLOCK_BEGIN_LABEL
3523 #define BLOCK_BEGIN_LABEL "LBB"
3525 #ifndef BLOCK_END_LABEL
3526 #define BLOCK_END_LABEL "LBE"
3528 #ifndef BODY_BEGIN_LABEL
3529 #define BODY_BEGIN_LABEL "Lbb"
3531 #ifndef BODY_END_LABEL
3532 #define BODY_END_LABEL "Lbe"
3534 #ifndef LINE_CODE_LABEL
3535 #define LINE_CODE_LABEL "LM"
3537 #ifndef SEPARATE_LINE_CODE_LABEL
3538 #define SEPARATE_LINE_CODE_LABEL "LSM"
3541 /* We allow a language front-end to designate a function that is to be
3542 called to "demangle" any name before it it put into a DIE. */
3544 static const char *(*demangle_name_func) PARAMS ((const char *));
3547 dwarf2out_set_demangle_name_func (func)
3548 const char *(*func) PARAMS ((const char *));
3550 demangle_name_func = func;
3553 /* Return an rtx like ORIG which lives forever. If we're doing GC,
3554 that means adding it to used_rtx_varray. If not, that means making
3555 a copy on the permanent_obstack. */
3562 VARRAY_PUSH_RTX (used_rtx_varray, orig);
3565 push_obstacks_nochange ();
3566 end_temporary_allocation ();
3567 orig = copy_rtx (orig);
3574 /* Test if rtl node points to a pseudo register. */
3580 return ((GET_CODE (rtl) == REG && REGNO (rtl) >= FIRST_PSEUDO_REGISTER)
3581 || (GET_CODE (rtl) == SUBREG
3582 && REGNO (XEXP (rtl, 0)) >= FIRST_PSEUDO_REGISTER));
3585 /* Return a reference to a type, with its const and volatile qualifiers
3589 type_main_variant (type)
3592 type = TYPE_MAIN_VARIANT (type);
3594 /* There really should be only one main variant among any group of variants
3595 of a given type (and all of the MAIN_VARIANT values for all members of
3596 the group should point to that one type) but sometimes the C front-end
3597 messes this up for array types, so we work around that bug here. */
3599 if (TREE_CODE (type) == ARRAY_TYPE)
3600 while (type != TYPE_MAIN_VARIANT (type))
3601 type = TYPE_MAIN_VARIANT (type);
3606 /* Return non-zero if the given type node represents a tagged type. */
3609 is_tagged_type (type)
3612 register enum tree_code code = TREE_CODE (type);
3614 return (code == RECORD_TYPE || code == UNION_TYPE
3615 || code == QUAL_UNION_TYPE || code == ENUMERAL_TYPE);
3618 /* Convert a DIE tag into its string name. */
3621 dwarf_tag_name (tag)
3622 register unsigned tag;
3626 case DW_TAG_padding:
3627 return "DW_TAG_padding";
3628 case DW_TAG_array_type:
3629 return "DW_TAG_array_type";
3630 case DW_TAG_class_type:
3631 return "DW_TAG_class_type";
3632 case DW_TAG_entry_point:
3633 return "DW_TAG_entry_point";
3634 case DW_TAG_enumeration_type:
3635 return "DW_TAG_enumeration_type";
3636 case DW_TAG_formal_parameter:
3637 return "DW_TAG_formal_parameter";
3638 case DW_TAG_imported_declaration:
3639 return "DW_TAG_imported_declaration";
3641 return "DW_TAG_label";
3642 case DW_TAG_lexical_block:
3643 return "DW_TAG_lexical_block";
3645 return "DW_TAG_member";
3646 case DW_TAG_pointer_type:
3647 return "DW_TAG_pointer_type";
3648 case DW_TAG_reference_type:
3649 return "DW_TAG_reference_type";
3650 case DW_TAG_compile_unit:
3651 return "DW_TAG_compile_unit";
3652 case DW_TAG_string_type:
3653 return "DW_TAG_string_type";
3654 case DW_TAG_structure_type:
3655 return "DW_TAG_structure_type";
3656 case DW_TAG_subroutine_type:
3657 return "DW_TAG_subroutine_type";
3658 case DW_TAG_typedef:
3659 return "DW_TAG_typedef";
3660 case DW_TAG_union_type:
3661 return "DW_TAG_union_type";
3662 case DW_TAG_unspecified_parameters:
3663 return "DW_TAG_unspecified_parameters";
3664 case DW_TAG_variant:
3665 return "DW_TAG_variant";
3666 case DW_TAG_common_block:
3667 return "DW_TAG_common_block";
3668 case DW_TAG_common_inclusion:
3669 return "DW_TAG_common_inclusion";
3670 case DW_TAG_inheritance:
3671 return "DW_TAG_inheritance";
3672 case DW_TAG_inlined_subroutine:
3673 return "DW_TAG_inlined_subroutine";
3675 return "DW_TAG_module";
3676 case DW_TAG_ptr_to_member_type:
3677 return "DW_TAG_ptr_to_member_type";
3678 case DW_TAG_set_type:
3679 return "DW_TAG_set_type";
3680 case DW_TAG_subrange_type:
3681 return "DW_TAG_subrange_type";
3682 case DW_TAG_with_stmt:
3683 return "DW_TAG_with_stmt";
3684 case DW_TAG_access_declaration:
3685 return "DW_TAG_access_declaration";
3686 case DW_TAG_base_type:
3687 return "DW_TAG_base_type";
3688 case DW_TAG_catch_block:
3689 return "DW_TAG_catch_block";
3690 case DW_TAG_const_type:
3691 return "DW_TAG_const_type";
3692 case DW_TAG_constant:
3693 return "DW_TAG_constant";
3694 case DW_TAG_enumerator:
3695 return "DW_TAG_enumerator";
3696 case DW_TAG_file_type:
3697 return "DW_TAG_file_type";
3699 return "DW_TAG_friend";
3700 case DW_TAG_namelist:
3701 return "DW_TAG_namelist";
3702 case DW_TAG_namelist_item:
3703 return "DW_TAG_namelist_item";
3704 case DW_TAG_packed_type:
3705 return "DW_TAG_packed_type";
3706 case DW_TAG_subprogram:
3707 return "DW_TAG_subprogram";
3708 case DW_TAG_template_type_param:
3709 return "DW_TAG_template_type_param";
3710 case DW_TAG_template_value_param:
3711 return "DW_TAG_template_value_param";
3712 case DW_TAG_thrown_type:
3713 return "DW_TAG_thrown_type";
3714 case DW_TAG_try_block:
3715 return "DW_TAG_try_block";
3716 case DW_TAG_variant_part:
3717 return "DW_TAG_variant_part";
3718 case DW_TAG_variable:
3719 return "DW_TAG_variable";
3720 case DW_TAG_volatile_type:
3721 return "DW_TAG_volatile_type";
3722 case DW_TAG_MIPS_loop:
3723 return "DW_TAG_MIPS_loop";
3724 case DW_TAG_format_label:
3725 return "DW_TAG_format_label";
3726 case DW_TAG_function_template:
3727 return "DW_TAG_function_template";
3728 case DW_TAG_class_template:
3729 return "DW_TAG_class_template";
3731 return "DW_TAG_<unknown>";
3735 /* Convert a DWARF attribute code into its string name. */
3738 dwarf_attr_name (attr)
3739 register unsigned attr;
3744 return "DW_AT_sibling";
3745 case DW_AT_location:
3746 return "DW_AT_location";
3748 return "DW_AT_name";
3749 case DW_AT_ordering:
3750 return "DW_AT_ordering";
3751 case DW_AT_subscr_data:
3752 return "DW_AT_subscr_data";
3753 case DW_AT_byte_size:
3754 return "DW_AT_byte_size";
3755 case DW_AT_bit_offset:
3756 return "DW_AT_bit_offset";
3757 case DW_AT_bit_size:
3758 return "DW_AT_bit_size";
3759 case DW_AT_element_list:
3760 return "DW_AT_element_list";
3761 case DW_AT_stmt_list:
3762 return "DW_AT_stmt_list";
3764 return "DW_AT_low_pc";
3766 return "DW_AT_high_pc";
3767 case DW_AT_language:
3768 return "DW_AT_language";
3770 return "DW_AT_member";
3772 return "DW_AT_discr";
3773 case DW_AT_discr_value:
3774 return "DW_AT_discr_value";
3775 case DW_AT_visibility:
3776 return "DW_AT_visibility";
3778 return "DW_AT_import";
3779 case DW_AT_string_length:
3780 return "DW_AT_string_length";
3781 case DW_AT_common_reference:
3782 return "DW_AT_common_reference";
3783 case DW_AT_comp_dir:
3784 return "DW_AT_comp_dir";
3785 case DW_AT_const_value:
3786 return "DW_AT_const_value";
3787 case DW_AT_containing_type:
3788 return "DW_AT_containing_type";
3789 case DW_AT_default_value:
3790 return "DW_AT_default_value";
3792 return "DW_AT_inline";
3793 case DW_AT_is_optional:
3794 return "DW_AT_is_optional";
3795 case DW_AT_lower_bound:
3796 return "DW_AT_lower_bound";
3797 case DW_AT_producer:
3798 return "DW_AT_producer";
3799 case DW_AT_prototyped:
3800 return "DW_AT_prototyped";
3801 case DW_AT_return_addr:
3802 return "DW_AT_return_addr";
3803 case DW_AT_start_scope:
3804 return "DW_AT_start_scope";
3805 case DW_AT_stride_size:
3806 return "DW_AT_stride_size";
3807 case DW_AT_upper_bound:
3808 return "DW_AT_upper_bound";
3809 case DW_AT_abstract_origin:
3810 return "DW_AT_abstract_origin";
3811 case DW_AT_accessibility:
3812 return "DW_AT_accessibility";
3813 case DW_AT_address_class:
3814 return "DW_AT_address_class";
3815 case DW_AT_artificial:
3816 return "DW_AT_artificial";
3817 case DW_AT_base_types:
3818 return "DW_AT_base_types";
3819 case DW_AT_calling_convention:
3820 return "DW_AT_calling_convention";
3822 return "DW_AT_count";
3823 case DW_AT_data_member_location:
3824 return "DW_AT_data_member_location";
3825 case DW_AT_decl_column:
3826 return "DW_AT_decl_column";
3827 case DW_AT_decl_file:
3828 return "DW_AT_decl_file";
3829 case DW_AT_decl_line:
3830 return "DW_AT_decl_line";
3831 case DW_AT_declaration:
3832 return "DW_AT_declaration";
3833 case DW_AT_discr_list:
3834 return "DW_AT_discr_list";
3835 case DW_AT_encoding:
3836 return "DW_AT_encoding";
3837 case DW_AT_external:
3838 return "DW_AT_external";
3839 case DW_AT_frame_base:
3840 return "DW_AT_frame_base";
3842 return "DW_AT_friend";
3843 case DW_AT_identifier_case:
3844 return "DW_AT_identifier_case";
3845 case DW_AT_macro_info:
3846 return "DW_AT_macro_info";
3847 case DW_AT_namelist_items:
3848 return "DW_AT_namelist_items";
3849 case DW_AT_priority:
3850 return "DW_AT_priority";
3852 return "DW_AT_segment";
3853 case DW_AT_specification:
3854 return "DW_AT_specification";
3855 case DW_AT_static_link:
3856 return "DW_AT_static_link";
3858 return "DW_AT_type";
3859 case DW_AT_use_location:
3860 return "DW_AT_use_location";
3861 case DW_AT_variable_parameter:
3862 return "DW_AT_variable_parameter";
3863 case DW_AT_virtuality:
3864 return "DW_AT_virtuality";
3865 case DW_AT_vtable_elem_location:
3866 return "DW_AT_vtable_elem_location";
3868 case DW_AT_MIPS_fde:
3869 return "DW_AT_MIPS_fde";
3870 case DW_AT_MIPS_loop_begin:
3871 return "DW_AT_MIPS_loop_begin";
3872 case DW_AT_MIPS_tail_loop_begin:
3873 return "DW_AT_MIPS_tail_loop_begin";
3874 case DW_AT_MIPS_epilog_begin:
3875 return "DW_AT_MIPS_epilog_begin";
3876 case DW_AT_MIPS_loop_unroll_factor:
3877 return "DW_AT_MIPS_loop_unroll_factor";
3878 case DW_AT_MIPS_software_pipeline_depth:
3879 return "DW_AT_MIPS_software_pipeline_depth";
3880 case DW_AT_MIPS_linkage_name:
3881 return "DW_AT_MIPS_linkage_name";
3882 case DW_AT_MIPS_stride:
3883 return "DW_AT_MIPS_stride";
3884 case DW_AT_MIPS_abstract_name:
3885 return "DW_AT_MIPS_abstract_name";
3886 case DW_AT_MIPS_clone_origin:
3887 return "DW_AT_MIPS_clone_origin";
3888 case DW_AT_MIPS_has_inlines:
3889 return "DW_AT_MIPS_has_inlines";
3891 case DW_AT_sf_names:
3892 return "DW_AT_sf_names";
3893 case DW_AT_src_info:
3894 return "DW_AT_src_info";
3895 case DW_AT_mac_info:
3896 return "DW_AT_mac_info";
3897 case DW_AT_src_coords:
3898 return "DW_AT_src_coords";
3899 case DW_AT_body_begin:
3900 return "DW_AT_body_begin";
3901 case DW_AT_body_end:
3902 return "DW_AT_body_end";
3904 return "DW_AT_<unknown>";
3908 /* Convert a DWARF value form code into its string name. */
3911 dwarf_form_name (form)
3912 register unsigned form;
3917 return "DW_FORM_addr";
3918 case DW_FORM_block2:
3919 return "DW_FORM_block2";
3920 case DW_FORM_block4:
3921 return "DW_FORM_block4";
3923 return "DW_FORM_data2";
3925 return "DW_FORM_data4";
3927 return "DW_FORM_data8";
3928 case DW_FORM_string:
3929 return "DW_FORM_string";
3931 return "DW_FORM_block";
3932 case DW_FORM_block1:
3933 return "DW_FORM_block1";
3935 return "DW_FORM_data1";
3937 return "DW_FORM_flag";
3939 return "DW_FORM_sdata";
3941 return "DW_FORM_strp";
3943 return "DW_FORM_udata";
3944 case DW_FORM_ref_addr:
3945 return "DW_FORM_ref_addr";
3947 return "DW_FORM_ref1";
3949 return "DW_FORM_ref2";
3951 return "DW_FORM_ref4";
3953 return "DW_FORM_ref8";
3954 case DW_FORM_ref_udata:
3955 return "DW_FORM_ref_udata";
3956 case DW_FORM_indirect:
3957 return "DW_FORM_indirect";
3959 return "DW_FORM_<unknown>";
3963 /* Convert a DWARF type code into its string name. */
3967 dwarf_type_encoding_name (enc)
3968 register unsigned enc;
3972 case DW_ATE_address:
3973 return "DW_ATE_address";
3974 case DW_ATE_boolean:
3975 return "DW_ATE_boolean";
3976 case DW_ATE_complex_float:
3977 return "DW_ATE_complex_float";
3979 return "DW_ATE_float";
3981 return "DW_ATE_signed";
3982 case DW_ATE_signed_char:
3983 return "DW_ATE_signed_char";
3984 case DW_ATE_unsigned:
3985 return "DW_ATE_unsigned";
3986 case DW_ATE_unsigned_char:
3987 return "DW_ATE_unsigned_char";
3989 return "DW_ATE_<unknown>";
3994 /* Determine the "ultimate origin" of a decl. The decl may be an inlined
3995 instance of an inlined instance of a decl which is local to an inline
3996 function, so we have to trace all of the way back through the origin chain
3997 to find out what sort of node actually served as the original seed for the
4001 decl_ultimate_origin (decl)
4004 /* output_inline_function sets DECL_ABSTRACT_ORIGIN for all the
4005 nodes in the function to point to themselves; ignore that if
4006 we're trying to output the abstract instance of this function. */
4007 if (DECL_ABSTRACT (decl) && DECL_ABSTRACT_ORIGIN (decl) == decl)
4010 #ifdef ENABLE_CHECKING
4011 if (DECL_FROM_INLINE (DECL_ORIGIN (decl)))
4012 /* Since the DECL_ABSTRACT_ORIGIN for a DECL is supposed to be the
4013 most distant ancestor, this should never happen. */
4017 return DECL_ABSTRACT_ORIGIN (decl);
4020 /* Determine the "ultimate origin" of a block. The block may be an inlined
4021 instance of an inlined instance of a block which is local to an inline
4022 function, so we have to trace all of the way back through the origin chain
4023 to find out what sort of node actually served as the original seed for the
4027 block_ultimate_origin (block)
4028 register tree block;
4030 register tree immediate_origin = BLOCK_ABSTRACT_ORIGIN (block);
4032 /* output_inline_function sets BLOCK_ABSTRACT_ORIGIN for all the
4033 nodes in the function to point to themselves; ignore that if
4034 we're trying to output the abstract instance of this function. */
4035 if (BLOCK_ABSTRACT (block) && immediate_origin == block)
4038 if (immediate_origin == NULL_TREE)
4042 register tree ret_val;
4043 register tree lookahead = immediate_origin;
4047 ret_val = lookahead;
4048 lookahead = (TREE_CODE (ret_val) == BLOCK)
4049 ? BLOCK_ABSTRACT_ORIGIN (ret_val)
4052 while (lookahead != NULL && lookahead != ret_val);
4058 /* Get the class to which DECL belongs, if any. In g++, the DECL_CONTEXT
4059 of a virtual function may refer to a base class, so we check the 'this'
4063 decl_class_context (decl)
4066 tree context = NULL_TREE;
4068 if (TREE_CODE (decl) != FUNCTION_DECL || ! DECL_VINDEX (decl))
4069 context = DECL_CONTEXT (decl);
4071 context = TYPE_MAIN_VARIANT
4072 (TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)))));
4074 if (context && !TYPE_P (context))
4075 context = NULL_TREE;
4080 /* Add an attribute/value pair to a DIE. We build the lists up in reverse
4081 addition order, and correct that in add_sibling_attributes. */
4084 add_dwarf_attr (die, attr)
4085 register dw_die_ref die;
4086 register dw_attr_ref attr;
4088 if (die != NULL && attr != NULL)
4090 attr->dw_attr_next = die->die_attr;
4091 die->die_attr = attr;
4095 static inline dw_val_class AT_class PARAMS ((dw_attr_ref));
4096 static inline dw_val_class
4100 return a->dw_attr_val.val_class;
4103 /* Add a flag value attribute to a DIE. */
4106 add_AT_flag (die, attr_kind, flag)
4107 register dw_die_ref die;
4108 register enum dwarf_attribute attr_kind;
4109 register unsigned flag;
4111 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4113 attr->dw_attr_next = NULL;
4114 attr->dw_attr = attr_kind;
4115 attr->dw_attr_val.val_class = dw_val_class_flag;
4116 attr->dw_attr_val.v.val_flag = flag;
4117 add_dwarf_attr (die, attr);
4120 static inline unsigned AT_flag PARAMS ((dw_attr_ref));
4121 static inline unsigned
4123 register dw_attr_ref a;
4125 if (a && AT_class (a) == dw_val_class_flag)
4126 return a->dw_attr_val.v.val_flag;
4131 /* Add a signed integer attribute value to a DIE. */
4134 add_AT_int (die, attr_kind, int_val)
4135 register dw_die_ref die;
4136 register enum dwarf_attribute attr_kind;
4137 register long int int_val;
4139 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4141 attr->dw_attr_next = NULL;
4142 attr->dw_attr = attr_kind;
4143 attr->dw_attr_val.val_class = dw_val_class_const;
4144 attr->dw_attr_val.v.val_int = int_val;
4145 add_dwarf_attr (die, attr);
4148 static inline long int AT_int PARAMS ((dw_attr_ref));
4149 static inline long int
4151 register dw_attr_ref a;
4153 if (a && AT_class (a) == dw_val_class_const)
4154 return a->dw_attr_val.v.val_int;
4159 /* Add an unsigned integer attribute value to a DIE. */
4162 add_AT_unsigned (die, attr_kind, unsigned_val)
4163 register dw_die_ref die;
4164 register enum dwarf_attribute attr_kind;
4165 register unsigned long unsigned_val;
4167 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4169 attr->dw_attr_next = NULL;
4170 attr->dw_attr = attr_kind;
4171 attr->dw_attr_val.val_class = dw_val_class_unsigned_const;
4172 attr->dw_attr_val.v.val_unsigned = unsigned_val;
4173 add_dwarf_attr (die, attr);
4176 static inline unsigned long AT_unsigned PARAMS ((dw_attr_ref));
4177 static inline unsigned long
4179 register dw_attr_ref a;
4181 if (a && AT_class (a) == dw_val_class_unsigned_const)
4182 return a->dw_attr_val.v.val_unsigned;
4187 /* Add an unsigned double integer attribute value to a DIE. */
4190 add_AT_long_long (die, attr_kind, val_hi, val_low)
4191 register dw_die_ref die;
4192 register enum dwarf_attribute attr_kind;
4193 register unsigned long val_hi;
4194 register unsigned long val_low;
4196 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4198 attr->dw_attr_next = NULL;
4199 attr->dw_attr = attr_kind;
4200 attr->dw_attr_val.val_class = dw_val_class_long_long;
4201 attr->dw_attr_val.v.val_long_long.hi = val_hi;
4202 attr->dw_attr_val.v.val_long_long.low = val_low;
4203 add_dwarf_attr (die, attr);
4206 /* Add a floating point attribute value to a DIE and return it. */
4209 add_AT_float (die, attr_kind, length, array)
4210 register dw_die_ref die;
4211 register enum dwarf_attribute attr_kind;
4212 register unsigned length;
4213 register long *array;
4215 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4217 attr->dw_attr_next = NULL;
4218 attr->dw_attr = attr_kind;
4219 attr->dw_attr_val.val_class = dw_val_class_float;
4220 attr->dw_attr_val.v.val_float.length = length;
4221 attr->dw_attr_val.v.val_float.array = array;
4222 add_dwarf_attr (die, attr);
4225 /* Add a string attribute value to a DIE. */
4228 add_AT_string (die, attr_kind, str)
4229 register dw_die_ref die;
4230 register enum dwarf_attribute attr_kind;
4231 register const char *str;
4233 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4235 attr->dw_attr_next = NULL;
4236 attr->dw_attr = attr_kind;
4237 attr->dw_attr_val.val_class = dw_val_class_str;
4238 attr->dw_attr_val.v.val_str = xstrdup (str);
4239 add_dwarf_attr (die, attr);
4242 static inline const char *AT_string PARAMS ((dw_attr_ref));
4243 static inline const char *
4245 register dw_attr_ref a;
4247 if (a && AT_class (a) == dw_val_class_str)
4248 return a->dw_attr_val.v.val_str;
4253 /* Add a DIE reference attribute value to a DIE. */
4256 add_AT_die_ref (die, attr_kind, targ_die)
4257 register dw_die_ref die;
4258 register enum dwarf_attribute attr_kind;
4259 register dw_die_ref targ_die;
4261 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4263 attr->dw_attr_next = NULL;
4264 attr->dw_attr = attr_kind;
4265 attr->dw_attr_val.val_class = dw_val_class_die_ref;
4266 attr->dw_attr_val.v.val_die_ref = targ_die;
4267 add_dwarf_attr (die, attr);
4270 static inline dw_die_ref AT_ref PARAMS ((dw_attr_ref));
4271 static inline dw_die_ref
4273 register dw_attr_ref a;
4275 if (a && AT_class (a) == dw_val_class_die_ref)
4276 return a->dw_attr_val.v.val_die_ref;
4281 /* Add an FDE reference attribute value to a DIE. */
4284 add_AT_fde_ref (die, attr_kind, targ_fde)
4285 register dw_die_ref die;
4286 register enum dwarf_attribute attr_kind;
4287 register unsigned targ_fde;
4289 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4291 attr->dw_attr_next = NULL;
4292 attr->dw_attr = attr_kind;
4293 attr->dw_attr_val.val_class = dw_val_class_fde_ref;
4294 attr->dw_attr_val.v.val_fde_index = targ_fde;
4295 add_dwarf_attr (die, attr);
4298 /* Add a location description attribute value to a DIE. */
4301 add_AT_loc (die, attr_kind, loc)
4302 register dw_die_ref die;
4303 register enum dwarf_attribute attr_kind;
4304 register dw_loc_descr_ref loc;
4306 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4308 attr->dw_attr_next = NULL;
4309 attr->dw_attr = attr_kind;
4310 attr->dw_attr_val.val_class = dw_val_class_loc;
4311 attr->dw_attr_val.v.val_loc = loc;
4312 add_dwarf_attr (die, attr);
4315 static inline dw_loc_descr_ref AT_loc PARAMS ((dw_attr_ref));
4316 static inline dw_loc_descr_ref
4318 register dw_attr_ref a;
4320 if (a && AT_class (a) == dw_val_class_loc)
4321 return a->dw_attr_val.v.val_loc;
4326 /* Add an address constant attribute value to a DIE. */
4329 add_AT_addr (die, attr_kind, addr)
4330 register dw_die_ref die;
4331 register enum dwarf_attribute attr_kind;
4334 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4336 attr->dw_attr_next = NULL;
4337 attr->dw_attr = attr_kind;
4338 attr->dw_attr_val.val_class = dw_val_class_addr;
4339 attr->dw_attr_val.v.val_addr = addr;
4340 add_dwarf_attr (die, attr);
4343 static inline rtx AT_addr PARAMS ((dw_attr_ref));
4346 register dw_attr_ref a;
4348 if (a && AT_class (a) == dw_val_class_addr)
4349 return a->dw_attr_val.v.val_addr;
4354 /* Add a label identifier attribute value to a DIE. */
4357 add_AT_lbl_id (die, attr_kind, lbl_id)
4358 register dw_die_ref die;
4359 register enum dwarf_attribute attr_kind;
4360 register const char *lbl_id;
4362 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4364 attr->dw_attr_next = NULL;
4365 attr->dw_attr = attr_kind;
4366 attr->dw_attr_val.val_class = dw_val_class_lbl_id;
4367 attr->dw_attr_val.v.val_lbl_id = xstrdup (lbl_id);
4368 add_dwarf_attr (die, attr);
4371 /* Add a section offset attribute value to a DIE. */
4374 add_AT_lbl_offset (die, attr_kind, label)
4375 register dw_die_ref die;
4376 register enum dwarf_attribute attr_kind;
4377 register const char *label;
4379 register dw_attr_ref attr = (dw_attr_ref) xmalloc (sizeof (dw_attr_node));
4381 attr->dw_attr_next = NULL;
4382 attr->dw_attr = attr_kind;
4383 attr->dw_attr_val.val_class = dw_val_class_lbl_offset;
4384 attr->dw_attr_val.v.val_lbl_id = xstrdup (label);
4385 add_dwarf_attr (die, attr);
4388 static inline const char *AT_lbl PARAMS ((dw_attr_ref));
4389 static inline const char *
4391 register dw_attr_ref a;
4393 if (a && (AT_class (a) == dw_val_class_lbl_id
4394 || AT_class (a) == dw_val_class_lbl_offset))
4395 return a->dw_attr_val.v.val_lbl_id;
4400 /* Get the attribute of type attr_kind. */
4402 static inline dw_attr_ref
4403 get_AT (die, attr_kind)
4404 register dw_die_ref die;
4405 register enum dwarf_attribute attr_kind;
4407 register dw_attr_ref a;
4408 register dw_die_ref spec = NULL;
4412 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4414 if (a->dw_attr == attr_kind)
4417 if (a->dw_attr == DW_AT_specification
4418 || a->dw_attr == DW_AT_abstract_origin)
4423 return get_AT (spec, attr_kind);
4429 /* Return the "low pc" attribute value, typically associated with
4430 a subprogram DIE. Return null if the "low pc" attribute is
4431 either not prsent, or if it cannot be represented as an
4432 assembler label identifier. */
4434 static inline const char *
4436 register dw_die_ref die;
4438 register dw_attr_ref a = get_AT (die, DW_AT_low_pc);
4442 /* Return the "high pc" attribute value, typically associated with
4443 a subprogram DIE. Return null if the "high pc" attribute is
4444 either not prsent, or if it cannot be represented as an
4445 assembler label identifier. */
4447 static inline const char *
4449 register dw_die_ref die;
4451 register dw_attr_ref a = get_AT (die, DW_AT_high_pc);
4455 /* Return the value of the string attribute designated by ATTR_KIND, or
4456 NULL if it is not present. */
4458 static inline const char *
4459 get_AT_string (die, attr_kind)
4460 register dw_die_ref die;
4461 register enum dwarf_attribute attr_kind;
4463 register dw_attr_ref a = get_AT (die, attr_kind);
4464 return AT_string (a);
4467 /* Return the value of the flag attribute designated by ATTR_KIND, or -1
4468 if it is not present. */
4471 get_AT_flag (die, attr_kind)
4472 register dw_die_ref die;
4473 register enum dwarf_attribute attr_kind;
4475 register dw_attr_ref a = get_AT (die, attr_kind);
4479 /* Return the value of the unsigned attribute designated by ATTR_KIND, or 0
4480 if it is not present. */
4482 static inline unsigned
4483 get_AT_unsigned (die, attr_kind)
4484 register dw_die_ref die;
4485 register enum dwarf_attribute attr_kind;
4487 register dw_attr_ref a = get_AT (die, attr_kind);
4488 return AT_unsigned (a);
4491 static inline dw_die_ref
4492 get_AT_ref (die, attr_kind)
4494 register enum dwarf_attribute attr_kind;
4496 register dw_attr_ref a = get_AT (die, attr_kind);
4503 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4505 return (lang == DW_LANG_C || lang == DW_LANG_C89
4506 || lang == DW_LANG_C_plus_plus);
4512 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4514 return (lang == DW_LANG_Fortran77 || lang == DW_LANG_Fortran90);
4520 register unsigned lang = get_AT_unsigned (comp_unit_die, DW_AT_language);
4522 return (lang == DW_LANG_Java);
4525 /* Free up the memory used by A. */
4527 static inline void free_AT PARAMS ((dw_attr_ref));
4532 switch (AT_class (a))
4534 case dw_val_class_str:
4535 case dw_val_class_lbl_id:
4536 case dw_val_class_lbl_offset:
4537 free (a->dw_attr_val.v.val_str);
4547 /* Remove the specified attribute if present. */
4550 remove_AT (die, attr_kind)
4551 register dw_die_ref die;
4552 register enum dwarf_attribute attr_kind;
4554 register dw_attr_ref *p;
4555 register dw_attr_ref removed = NULL;
4559 for (p = &(die->die_attr); *p; p = &((*p)->dw_attr_next))
4560 if ((*p)->dw_attr == attr_kind)
4563 *p = (*p)->dw_attr_next;
4572 /* Free up the memory used by DIE. */
4574 static inline void free_die PARAMS ((dw_die_ref));
4579 remove_children (die);
4583 /* Discard the children of this DIE. */
4586 remove_children (die)
4587 register dw_die_ref die;
4589 register dw_die_ref child_die = die->die_child;
4591 die->die_child = NULL;
4593 while (child_die != NULL)
4595 register dw_die_ref tmp_die = child_die;
4596 register dw_attr_ref a;
4598 child_die = child_die->die_sib;
4600 for (a = tmp_die->die_attr; a != NULL;)
4602 register dw_attr_ref tmp_a = a;
4604 a = a->dw_attr_next;
4612 /* Add a child DIE below its parent. We build the lists up in reverse
4613 addition order, and correct that in add_sibling_attributes. */
4616 add_child_die (die, child_die)
4617 register dw_die_ref die;
4618 register dw_die_ref child_die;
4620 if (die != NULL && child_die != NULL)
4622 if (die == child_die)
4624 child_die->die_parent = die;
4625 child_die->die_sib = die->die_child;
4626 die->die_child = child_die;
4630 /* Move CHILD, which must be a child of PARENT or the DIE for which PARENT
4631 is the specification, to the front of PARENT's list of children. */
4634 splice_child_die (parent, child)
4635 dw_die_ref parent, child;
4639 /* We want the declaration DIE from inside the class, not the
4640 specification DIE at toplevel. */
4641 if (child->die_parent != parent)
4643 dw_die_ref tmp = get_AT_ref (child, DW_AT_specification);
4648 if (child->die_parent != parent
4649 && child->die_parent != get_AT_ref (parent, DW_AT_specification))
4652 for (p = &(parent->die_child); *p; p = &((*p)->die_sib))
4655 *p = child->die_sib;
4659 child->die_sib = parent->die_child;
4660 parent->die_child = child;
4663 /* Return a pointer to a newly created DIE node. */
4665 static inline dw_die_ref
4666 new_die (tag_value, parent_die)
4667 register enum dwarf_tag tag_value;
4668 register dw_die_ref parent_die;
4670 register dw_die_ref die = (dw_die_ref) xmalloc (sizeof (die_node));
4672 die->die_tag = tag_value;
4673 die->die_abbrev = 0;
4674 die->die_offset = 0;
4675 die->die_child = NULL;
4676 die->die_parent = NULL;
4677 die->die_sib = NULL;
4678 die->die_attr = NULL;
4680 if (parent_die != NULL)
4681 add_child_die (parent_die, die);
4684 limbo_die_node *limbo_node;
4686 limbo_node = (limbo_die_node *) xmalloc (sizeof (limbo_die_node));
4687 limbo_node->die = die;
4688 limbo_node->next = limbo_die_list;
4689 limbo_die_list = limbo_node;
4695 /* Return the DIE associated with the given type specifier. */
4697 static inline dw_die_ref
4698 lookup_type_die (type)
4701 if (TREE_CODE (type) == VECTOR_TYPE)
4702 type = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4703 return (dw_die_ref) TYPE_SYMTAB_POINTER (type);
4706 /* Equate a DIE to a given type specifier. */
4709 equate_type_number_to_die (type, type_die)
4711 register dw_die_ref type_die;
4713 TYPE_SYMTAB_POINTER (type) = (char *) type_die;
4716 /* Return the DIE associated with a given declaration. */
4718 static inline dw_die_ref
4719 lookup_decl_die (decl)
4722 register unsigned decl_id = DECL_UID (decl);
4724 return (decl_id < decl_die_table_in_use
4725 ? decl_die_table[decl_id] : NULL);
4728 /* Equate a DIE to a particular declaration. */
4731 equate_decl_number_to_die (decl, decl_die)
4733 register dw_die_ref decl_die;
4735 register unsigned decl_id = DECL_UID (decl);
4736 register unsigned num_allocated;
4738 if (decl_id >= decl_die_table_allocated)
4741 = ((decl_id + 1 + DECL_DIE_TABLE_INCREMENT - 1)
4742 / DECL_DIE_TABLE_INCREMENT)
4743 * DECL_DIE_TABLE_INCREMENT;
4746 = (dw_die_ref *) xrealloc (decl_die_table,
4747 sizeof (dw_die_ref) * num_allocated);
4749 bzero ((char *) &decl_die_table[decl_die_table_allocated],
4750 (num_allocated - decl_die_table_allocated) * sizeof (dw_die_ref));
4751 decl_die_table_allocated = num_allocated;
4754 if (decl_id >= decl_die_table_in_use)
4755 decl_die_table_in_use = (decl_id + 1);
4757 decl_die_table[decl_id] = decl_die;
4760 /* Keep track of the number of spaces used to indent the
4761 output of the debugging routines that print the structure of
4762 the DIE internal representation. */
4763 static int print_indent;
4765 /* Indent the line the number of spaces given by print_indent. */
4768 print_spaces (outfile)
4771 fprintf (outfile, "%*s", print_indent, "");
4774 /* Print the information associated with a given DIE, and its children.
4775 This routine is a debugging aid only. */
4778 print_die (die, outfile)
4782 register dw_attr_ref a;
4783 register dw_die_ref c;
4785 print_spaces (outfile);
4786 fprintf (outfile, "DIE %4lu: %s\n",
4787 die->die_offset, dwarf_tag_name (die->die_tag));
4788 print_spaces (outfile);
4789 fprintf (outfile, " abbrev id: %lu", die->die_abbrev);
4790 fprintf (outfile, " offset: %lu\n", die->die_offset);
4792 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
4794 print_spaces (outfile);
4795 fprintf (outfile, " %s: ", dwarf_attr_name (a->dw_attr));
4797 switch (AT_class (a))
4799 case dw_val_class_addr:
4800 fprintf (outfile, "address");
4802 case dw_val_class_loc:
4803 fprintf (outfile, "location descriptor");
4805 case dw_val_class_const:
4806 fprintf (outfile, "%ld", AT_int (a));
4808 case dw_val_class_unsigned_const:
4809 fprintf (outfile, "%lu", AT_unsigned (a));
4811 case dw_val_class_long_long:
4812 fprintf (outfile, "constant (%lu,%lu)",
4813 a->dw_attr_val.v.val_long_long.hi,
4814 a->dw_attr_val.v.val_long_long.low);
4816 case dw_val_class_float:
4817 fprintf (outfile, "floating-point constant");
4819 case dw_val_class_flag:
4820 fprintf (outfile, "%u", AT_flag (a));
4822 case dw_val_class_die_ref:
4823 if (AT_ref (a) != NULL)
4824 fprintf (outfile, "die -> %lu", AT_ref (a)->die_offset);
4826 fprintf (outfile, "die -> <null>");
4828 case dw_val_class_lbl_id:
4829 case dw_val_class_lbl_offset:
4830 fprintf (outfile, "label: %s", AT_lbl (a));
4832 case dw_val_class_str:
4833 if (AT_string (a) != NULL)
4834 fprintf (outfile, "\"%s\"", AT_string (a));
4836 fprintf (outfile, "<null>");
4842 fprintf (outfile, "\n");
4845 if (die->die_child != NULL)
4848 for (c = die->die_child; c != NULL; c = c->die_sib)
4849 print_die (c, outfile);
4855 /* Print the contents of the source code line number correspondence table.
4856 This routine is a debugging aid only. */
4859 print_dwarf_line_table (outfile)
4862 register unsigned i;
4863 register dw_line_info_ref line_info;
4865 fprintf (outfile, "\n\nDWARF source line information\n");
4866 for (i = 1; i < line_info_table_in_use; ++i)
4868 line_info = &line_info_table[i];
4869 fprintf (outfile, "%5d: ", i);
4870 fprintf (outfile, "%-20s", file_table[line_info->dw_file_num]);
4871 fprintf (outfile, "%6ld", line_info->dw_line_num);
4872 fprintf (outfile, "\n");
4875 fprintf (outfile, "\n\n");
4878 /* Print the information collected for a given DIE. */
4881 debug_dwarf_die (die)
4884 print_die (die, stderr);
4887 /* Print all DWARF information collected for the compilation unit.
4888 This routine is a debugging aid only. */
4894 print_die (comp_unit_die, stderr);
4895 if (! DWARF2_ASM_LINE_DEBUG_INFO)
4896 print_dwarf_line_table (stderr);
4899 /* We build up the lists of children and attributes by pushing new ones
4900 onto the beginning of the list. Reverse the lists for DIE so that
4901 they are in order of addition. */
4904 reverse_die_lists (die)
4905 register dw_die_ref die;
4907 register dw_die_ref c, cp, cn;
4908 register dw_attr_ref a, ap, an;
4910 for (a = die->die_attr, ap = 0; a; a = an)
4912 an = a->dw_attr_next;
4913 a->dw_attr_next = ap;
4918 for (c = die->die_child, cp = 0; c; c = cn)
4924 die->die_child = cp;
4927 /* Traverse the DIE, reverse its lists of attributes and children, and
4928 add a sibling attribute if it may have the effect of speeding up
4929 access to siblings. To save some space, avoid generating sibling
4930 attributes for DIE's without children. */
4933 add_sibling_attributes (die)
4934 register dw_die_ref die;
4936 register dw_die_ref c;
4938 reverse_die_lists (die);
4940 if (die != comp_unit_die && die->die_sib && die->die_child != NULL)
4941 /* Add the sibling link to the front of the attribute list. */
4942 add_AT_die_ref (die, DW_AT_sibling, die->die_sib);
4944 for (c = die->die_child; c != NULL; c = c->die_sib)
4945 add_sibling_attributes (c);
4948 /* The format of each DIE (and its attribute value pairs)
4949 is encoded in an abbreviation table. This routine builds the
4950 abbreviation table and assigns a unique abbreviation id for
4951 each abbreviation entry. The children of each die are visited
4955 build_abbrev_table (die)
4956 register dw_die_ref die;
4958 register unsigned long abbrev_id;
4959 register unsigned long n_alloc;
4960 register dw_die_ref c;
4961 register dw_attr_ref d_attr, a_attr;
4962 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
4964 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
4966 if (abbrev->die_tag == die->die_tag)
4968 if ((abbrev->die_child != NULL) == (die->die_child != NULL))
4970 a_attr = abbrev->die_attr;
4971 d_attr = die->die_attr;
4973 while (a_attr != NULL && d_attr != NULL)
4975 if ((a_attr->dw_attr != d_attr->dw_attr)
4976 || (value_format (a_attr) != value_format (d_attr)))
4979 a_attr = a_attr->dw_attr_next;
4980 d_attr = d_attr->dw_attr_next;
4983 if (a_attr == NULL && d_attr == NULL)
4989 if (abbrev_id >= abbrev_die_table_in_use)
4991 if (abbrev_die_table_in_use >= abbrev_die_table_allocated)
4993 n_alloc = abbrev_die_table_allocated + ABBREV_DIE_TABLE_INCREMENT;
4995 = (dw_die_ref *) xrealloc (abbrev_die_table,
4996 sizeof (dw_die_ref) * n_alloc);
4998 bzero ((char *) &abbrev_die_table[abbrev_die_table_allocated],
4999 (n_alloc - abbrev_die_table_allocated) * sizeof (dw_die_ref));
5000 abbrev_die_table_allocated = n_alloc;
5003 ++abbrev_die_table_in_use;
5004 abbrev_die_table[abbrev_id] = die;
5007 die->die_abbrev = abbrev_id;
5008 for (c = die->die_child; c != NULL; c = c->die_sib)
5009 build_abbrev_table (c);
5012 /* Return the size of a string, including the null byte.
5014 This used to treat backslashes as escapes, and hence they were not included
5015 in the count. However, that conflicts with what ASM_OUTPUT_ASCII does,
5016 which treats a backslash as a backslash, escaping it if necessary, and hence
5017 we must include them in the count. */
5019 static unsigned long
5020 size_of_string (str)
5021 register const char *str;
5023 return strlen (str) + 1;
5026 /* Return the power-of-two number of bytes necessary to represent VALUE. */
5029 constant_size (value)
5030 long unsigned value;
5037 log = floor_log2 (value);
5040 log = 1 << (floor_log2 (log) + 1);
5045 /* Return the size of a DIE, as it is represented in the
5046 .debug_info section. */
5048 static unsigned long
5050 register dw_die_ref die;
5052 register unsigned long size = 0;
5053 register dw_attr_ref a;
5055 size += size_of_uleb128 (die->die_abbrev);
5056 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5058 switch (AT_class (a))
5060 case dw_val_class_addr:
5061 size += DWARF2_ADDR_SIZE;
5063 case dw_val_class_loc:
5065 register unsigned long lsize = size_of_locs (AT_loc (a));
5068 size += constant_size (lsize);
5072 case dw_val_class_const:
5073 size += size_of_sleb128 (AT_int (a));
5075 case dw_val_class_unsigned_const:
5076 size += constant_size (AT_unsigned (a));
5078 case dw_val_class_long_long:
5079 size += 1 + 8; /* block */
5081 case dw_val_class_float:
5082 size += 1 + a->dw_attr_val.v.val_float.length * 4; /* block */
5084 case dw_val_class_flag:
5087 case dw_val_class_die_ref:
5088 size += DWARF_OFFSET_SIZE;
5090 case dw_val_class_fde_ref:
5091 size += DWARF_OFFSET_SIZE;
5093 case dw_val_class_lbl_id:
5094 size += DWARF2_ADDR_SIZE;
5096 case dw_val_class_lbl_offset:
5097 size += DWARF_OFFSET_SIZE;
5099 case dw_val_class_str:
5100 size += size_of_string (AT_string (a));
5110 /* Size the debugging information associated with a given DIE.
5111 Visits the DIE's children recursively. Updates the global
5112 variable next_die_offset, on each time through. Uses the
5113 current value of next_die_offset to update the die_offset
5114 field in each DIE. */
5117 calc_die_sizes (die)
5120 register dw_die_ref c;
5121 die->die_offset = next_die_offset;
5122 next_die_offset += size_of_die (die);
5124 for (c = die->die_child; c != NULL; c = c->die_sib)
5127 if (die->die_child != NULL)
5128 /* Count the null byte used to terminate sibling lists. */
5129 next_die_offset += 1;
5132 /* Return the size of the line information prolog generated for the
5133 compilation unit. */
5135 static unsigned long
5136 size_of_line_prolog ()
5138 register unsigned long size;
5139 register unsigned long ft_index;
5141 size = DWARF_LINE_PROLOG_HEADER_SIZE;
5143 /* Count the size of the table giving number of args for each
5145 size += DWARF_LINE_OPCODE_BASE - 1;
5147 /* Include directory table is empty (at present). Count only the
5148 null byte used to terminate the table. */
5151 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5153 /* File name entry. */
5154 size += size_of_string (file_table[ft_index]);
5156 /* Include directory index. */
5157 size += size_of_uleb128 (0);
5159 /* Modification time. */
5160 size += size_of_uleb128 (0);
5162 /* File length in bytes. */
5163 size += size_of_uleb128 (0);
5166 /* Count the file table terminator. */
5171 /* Return the size of the .debug_pubnames table generated for the
5172 compilation unit. */
5174 static unsigned long
5177 register unsigned long size;
5178 register unsigned i;
5180 size = DWARF_PUBNAMES_HEADER_SIZE;
5181 for (i = 0; i < pubname_table_in_use; ++i)
5183 register pubname_ref p = &pubname_table[i];
5184 size += DWARF_OFFSET_SIZE + size_of_string (p->name);
5187 size += DWARF_OFFSET_SIZE;
5191 /* Return the size of the information in the .debug_aranges section. */
5193 static unsigned long
5196 register unsigned long size;
5198 size = DWARF_ARANGES_HEADER_SIZE;
5200 /* Count the address/length pair for this compilation unit. */
5201 size += 2 * DWARF2_ADDR_SIZE;
5202 size += 2 * DWARF2_ADDR_SIZE * arange_table_in_use;
5204 /* Count the two zero words used to terminated the address range table. */
5205 size += 2 * DWARF2_ADDR_SIZE;
5209 /* Select the encoding of an attribute value. */
5211 static enum dwarf_form
5215 switch (a->dw_attr_val.val_class)
5217 case dw_val_class_addr:
5218 return DW_FORM_addr;
5219 case dw_val_class_loc:
5220 switch (constant_size (size_of_locs (AT_loc (a))))
5223 return DW_FORM_block1;
5225 return DW_FORM_block2;
5229 case dw_val_class_const:
5230 return DW_FORM_sdata;
5231 case dw_val_class_unsigned_const:
5232 switch (constant_size (AT_unsigned (a)))
5235 return DW_FORM_data1;
5237 return DW_FORM_data2;
5239 return DW_FORM_data4;
5241 return DW_FORM_data8;
5245 case dw_val_class_long_long:
5246 return DW_FORM_block1;
5247 case dw_val_class_float:
5248 return DW_FORM_block1;
5249 case dw_val_class_flag:
5250 return DW_FORM_flag;
5251 case dw_val_class_die_ref:
5253 case dw_val_class_fde_ref:
5254 return DW_FORM_data;
5255 case dw_val_class_lbl_id:
5256 return DW_FORM_addr;
5257 case dw_val_class_lbl_offset:
5258 return DW_FORM_data;
5259 case dw_val_class_str:
5260 return DW_FORM_string;
5266 /* Output the encoding of an attribute value. */
5269 output_value_format (a)
5272 enum dwarf_form form = value_format (a);
5274 output_uleb128 (form);
5276 fprintf (asm_out_file, " (%s)", dwarf_form_name (form));
5278 fputc ('\n', asm_out_file);
5281 /* Output the .debug_abbrev section which defines the DIE abbreviation
5285 output_abbrev_section ()
5287 unsigned long abbrev_id;
5290 for (abbrev_id = 1; abbrev_id < abbrev_die_table_in_use; ++abbrev_id)
5292 register dw_die_ref abbrev = abbrev_die_table[abbrev_id];
5294 output_uleb128 (abbrev_id);
5296 fprintf (asm_out_file, " (abbrev code)");
5298 fputc ('\n', asm_out_file);
5299 output_uleb128 (abbrev->die_tag);
5301 fprintf (asm_out_file, " (TAG: %s)",
5302 dwarf_tag_name (abbrev->die_tag));
5304 fputc ('\n', asm_out_file);
5305 fprintf (asm_out_file, "\t%s\t0x%x", ASM_BYTE_OP,
5306 abbrev->die_child != NULL ? DW_children_yes : DW_children_no);
5309 fprintf (asm_out_file, "\t%s %s",
5311 (abbrev->die_child != NULL
5312 ? "DW_children_yes" : "DW_children_no"));
5314 fputc ('\n', asm_out_file);
5316 for (a_attr = abbrev->die_attr; a_attr != NULL;
5317 a_attr = a_attr->dw_attr_next)
5319 output_uleb128 (a_attr->dw_attr);
5321 fprintf (asm_out_file, " (%s)",
5322 dwarf_attr_name (a_attr->dw_attr));
5324 fputc ('\n', asm_out_file);
5325 output_value_format (a_attr);
5328 fprintf (asm_out_file, "\t%s\t0,0\n", ASM_BYTE_OP);
5331 /* Terminate the table. */
5332 fprintf (asm_out_file, "\t%s\t0\n", ASM_BYTE_OP);
5335 /* Output the DIE and its attributes. Called recursively to generate
5336 the definitions of each child DIE. */
5340 register dw_die_ref die;
5342 register dw_attr_ref a;
5343 register dw_die_ref c;
5344 register unsigned long size;
5346 output_uleb128 (die->die_abbrev);
5348 fprintf (asm_out_file, " (DIE (0x%lx) %s)",
5349 die->die_offset, dwarf_tag_name (die->die_tag));
5351 fputc ('\n', asm_out_file);
5353 for (a = die->die_attr; a != NULL; a = a->dw_attr_next)
5355 switch (AT_class (a))
5357 case dw_val_class_addr:
5358 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file, AT_addr (a));
5361 case dw_val_class_loc:
5362 size = size_of_locs (AT_loc (a));
5364 /* Output the block length for this list of location operations. */
5365 switch (constant_size (size))
5368 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, size);
5371 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, size);
5378 fprintf (asm_out_file, "\t%s %s",
5379 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5381 fputc ('\n', asm_out_file);
5383 output_loc_sequence (AT_loc (a));
5386 case dw_val_class_const:
5387 /* ??? It would be slightly more efficient to use a scheme like is
5388 used for unsigned constants below, but gdb 4.x does not sign
5389 extend. Gdb 5.x does sign extend. */
5390 output_sleb128 (AT_int (a));
5393 case dw_val_class_unsigned_const:
5394 switch (constant_size (AT_unsigned (a)))
5397 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, AT_unsigned (a));
5400 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, AT_unsigned (a));
5403 ASM_OUTPUT_DWARF_DATA4 (asm_out_file, AT_unsigned (a));
5406 ASM_OUTPUT_DWARF_DATA8 (asm_out_file, AT_unsigned (a));
5413 case dw_val_class_long_long:
5414 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 8);
5416 fprintf (asm_out_file, "\t%s %s",
5417 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5419 fputc ('\n', asm_out_file);
5420 ASM_OUTPUT_DWARF_CONST_DOUBLE (asm_out_file,
5421 a->dw_attr_val.v.val_long_long.hi,
5422 a->dw_attr_val.v.val_long_long.low);
5425 fprintf (asm_out_file,
5426 "\t%s long long constant", ASM_COMMENT_START);
5428 fputc ('\n', asm_out_file);
5431 case dw_val_class_float:
5433 register unsigned int i;
5434 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
5435 a->dw_attr_val.v.val_float.length * 4);
5437 fprintf (asm_out_file, "\t%s %s",
5438 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5440 fputc ('\n', asm_out_file);
5441 for (i = 0; i < a->dw_attr_val.v.val_float.length; ++i)
5443 ASM_OUTPUT_DWARF_DATA4 (asm_out_file,
5444 a->dw_attr_val.v.val_float.array[i]);
5446 fprintf (asm_out_file, "\t%s fp constant word %u",
5447 ASM_COMMENT_START, i);
5449 fputc ('\n', asm_out_file);
5454 case dw_val_class_flag:
5455 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, AT_flag (a));
5458 case dw_val_class_die_ref:
5459 ASM_OUTPUT_DWARF_DATA (asm_out_file, AT_ref (a)->die_offset);
5462 case dw_val_class_fde_ref:
5465 ASM_GENERATE_INTERNAL_LABEL
5466 (l1, FDE_AFTER_SIZE_LABEL, a->dw_attr_val.v.val_fde_index * 2);
5467 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, l1);
5468 fprintf (asm_out_file, " - %d", DWARF_OFFSET_SIZE);
5472 case dw_val_class_lbl_id:
5473 ASM_OUTPUT_DWARF_ADDR (asm_out_file, AT_lbl (a));
5476 case dw_val_class_lbl_offset:
5477 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, AT_lbl (a));
5480 case dw_val_class_str:
5482 ASM_OUTPUT_DWARF_STRING (asm_out_file, AT_string (a));
5484 ASM_OUTPUT_ASCII (asm_out_file, AT_string (a),
5485 (int) strlen (AT_string (a)) + 1);
5492 if (AT_class (a) != dw_val_class_loc
5493 && AT_class (a) != dw_val_class_long_long
5494 && AT_class (a) != dw_val_class_float)
5497 fprintf (asm_out_file, "\t%s %s",
5498 ASM_COMMENT_START, dwarf_attr_name (a->dw_attr));
5500 fputc ('\n', asm_out_file);
5504 for (c = die->die_child; c != NULL; c = c->die_sib)
5507 if (die->die_child != NULL)
5509 /* Add null byte to terminate sibling list. */
5510 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5512 fprintf (asm_out_file, "\t%s end of children of DIE 0x%lx",
5513 ASM_COMMENT_START, die->die_offset);
5515 fputc ('\n', asm_out_file);
5519 /* Output the compilation unit that appears at the beginning of the
5520 .debug_info section, and precedes the DIE descriptions. */
5523 output_compilation_unit_header ()
5525 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset - DWARF_OFFSET_SIZE);
5527 fprintf (asm_out_file, "\t%s Length of Compilation Unit Info.",
5530 fputc ('\n', asm_out_file);
5531 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5533 fprintf (asm_out_file, "\t%s DWARF version number", ASM_COMMENT_START);
5535 fputc ('\n', asm_out_file);
5536 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, abbrev_section_label);
5538 fprintf (asm_out_file, "\t%s Offset Into Abbrev. Section",
5541 fputc ('\n', asm_out_file);
5542 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF2_ADDR_SIZE);
5544 fprintf (asm_out_file, "\t%s Pointer Size (in bytes)", ASM_COMMENT_START);
5546 fputc ('\n', asm_out_file);
5549 /* The DWARF2 pubname for a nested thingy looks like "A::f". The output
5550 of decl_printable_name for C++ looks like "A::f(int)". Let's drop the
5551 argument list, and maybe the scope. */
5554 dwarf2_name (decl, scope)
5558 return (*decl_printable_name) (decl, scope ? 1 : 0);
5561 /* Add a new entry to .debug_pubnames if appropriate. */
5564 add_pubname (decl, die)
5570 if (! TREE_PUBLIC (decl))
5573 if (pubname_table_in_use == pubname_table_allocated)
5575 pubname_table_allocated += PUBNAME_TABLE_INCREMENT;
5576 pubname_table = (pubname_ref) xrealloc
5577 (pubname_table, pubname_table_allocated * sizeof (pubname_entry));
5580 p = &pubname_table[pubname_table_in_use++];
5583 p->name = xstrdup (dwarf2_name (decl, 1));
5586 /* Output the public names table used to speed up access to externally
5587 visible names. For now, only generate entries for externally
5588 visible procedures. */
5593 register unsigned i;
5594 register unsigned long pubnames_length = size_of_pubnames ();
5596 ASM_OUTPUT_DWARF_DATA (asm_out_file, pubnames_length);
5599 fprintf (asm_out_file, "\t%s Length of Public Names Info.",
5602 fputc ('\n', asm_out_file);
5603 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5606 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5608 fputc ('\n', asm_out_file);
5609 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5611 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5614 fputc ('\n', asm_out_file);
5615 ASM_OUTPUT_DWARF_DATA (asm_out_file, next_die_offset);
5617 fprintf (asm_out_file, "\t%s Compilation Unit Length", ASM_COMMENT_START);
5619 fputc ('\n', asm_out_file);
5620 for (i = 0; i < pubname_table_in_use; ++i)
5622 register pubname_ref pub = &pubname_table[i];
5624 ASM_OUTPUT_DWARF_DATA (asm_out_file, pub->die->die_offset);
5626 fprintf (asm_out_file, "\t%s DIE offset", ASM_COMMENT_START);
5628 fputc ('\n', asm_out_file);
5632 ASM_OUTPUT_DWARF_STRING (asm_out_file, pub->name);
5633 fprintf (asm_out_file, "%s external name", ASM_COMMENT_START);
5637 ASM_OUTPUT_ASCII (asm_out_file, pub->name,
5638 (int) strlen (pub->name) + 1);
5641 fputc ('\n', asm_out_file);
5644 ASM_OUTPUT_DWARF_DATA (asm_out_file, 0);
5645 fputc ('\n', asm_out_file);
5648 /* Add a new entry to .debug_aranges if appropriate. */
5651 add_arange (decl, die)
5655 if (! DECL_SECTION_NAME (decl))
5658 if (arange_table_in_use == arange_table_allocated)
5660 arange_table_allocated += ARANGE_TABLE_INCREMENT;
5662 = (arange_ref) xrealloc (arange_table,
5663 arange_table_allocated * sizeof (dw_die_ref));
5666 arange_table[arange_table_in_use++] = die;
5669 /* Output the information that goes into the .debug_aranges table.
5670 Namely, define the beginning and ending address range of the
5671 text section generated for this compilation unit. */
5676 register unsigned i;
5677 register unsigned long aranges_length = size_of_aranges ();
5679 ASM_OUTPUT_DWARF_DATA (asm_out_file, aranges_length);
5681 fprintf (asm_out_file, "\t%s Length of Address Ranges Info.",
5684 fputc ('\n', asm_out_file);
5685 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5687 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5689 fputc ('\n', asm_out_file);
5690 ASM_OUTPUT_DWARF_OFFSET (asm_out_file, debug_info_section_label);
5692 fprintf (asm_out_file, "\t%s Offset of Compilation Unit Info.",
5695 fputc ('\n', asm_out_file);
5696 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF2_ADDR_SIZE);
5698 fprintf (asm_out_file, "\t%s Size of Address", ASM_COMMENT_START);
5700 fputc ('\n', asm_out_file);
5701 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5703 fprintf (asm_out_file, "\t%s Size of Segment Descriptor",
5706 fputc ('\n', asm_out_file);
5708 /* We need to align to twice the pointer size here. */
5709 if (DWARF_ARANGES_PAD_SIZE)
5711 /* Pad using a 2 bytes word so that padding is correct
5712 for any pointer size. */
5713 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, 0);
5714 for (i = 2; i < DWARF_ARANGES_PAD_SIZE; i += 2)
5715 fprintf (asm_out_file, ",0");
5717 fprintf (asm_out_file, "\t%s Pad to %d byte boundary",
5718 ASM_COMMENT_START, 2 * DWARF2_ADDR_SIZE);
5721 fputc ('\n', asm_out_file);
5722 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_section_label);
5724 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5726 fputc ('\n', asm_out_file);
5727 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, text_end_label,
5728 text_section_label);
5730 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5732 fputc ('\n', asm_out_file);
5733 for (i = 0; i < arange_table_in_use; ++i)
5735 dw_die_ref die = arange_table[i];
5737 if (die->die_tag == DW_TAG_subprogram)
5738 ASM_OUTPUT_DWARF_ADDR (asm_out_file, get_AT_low_pc (die));
5741 /* A static variable; extract the symbol from DW_AT_location.
5742 Note that this code isn't currently hit, as we only emit
5743 aranges for functions (jason 9/23/99). */
5745 dw_attr_ref a = get_AT (die, DW_AT_location);
5746 dw_loc_descr_ref loc;
5747 if (! a || AT_class (a) != dw_val_class_loc)
5751 if (loc->dw_loc_opc != DW_OP_addr)
5754 ASM_OUTPUT_DWARF_ADDR_CONST (asm_out_file,
5755 loc->dw_loc_oprnd1.v.val_addr);
5759 fprintf (asm_out_file, "\t%s Address", ASM_COMMENT_START);
5761 fputc ('\n', asm_out_file);
5762 if (die->die_tag == DW_TAG_subprogram)
5763 ASM_OUTPUT_DWARF_ADDR_DELTA (asm_out_file, get_AT_hi_pc (die),
5764 get_AT_low_pc (die));
5766 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file,
5767 get_AT_unsigned (die, DW_AT_byte_size));
5770 fprintf (asm_out_file, "%s Length", ASM_COMMENT_START);
5772 fputc ('\n', asm_out_file);
5775 /* Output the terminator words. */
5776 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5777 fputc ('\n', asm_out_file);
5778 ASM_OUTPUT_DWARF_ADDR_DATA (asm_out_file, 0);
5779 fputc ('\n', asm_out_file);
5782 /* Output the source line number correspondence information. This
5783 information goes into the .debug_line section. */
5788 char line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5789 char prev_line_label[MAX_ARTIFICIAL_LABEL_BYTES];
5790 register unsigned opc;
5791 register unsigned n_op_args;
5792 register unsigned long ft_index;
5793 register unsigned long lt_index;
5794 register unsigned long current_line;
5795 register long line_offset;
5796 register long line_delta;
5797 register unsigned long current_file;
5798 register unsigned long function;
5800 ASM_OUTPUT_DWARF_DELTA (asm_out_file, ".LTEND", ".LTSTART");
5802 fprintf (asm_out_file, "\t%s Length of Source Line Info.",
5805 fputc ('\n', asm_out_file);
5806 ASM_OUTPUT_LABEL (asm_out_file, ".LTSTART");
5807 ASM_OUTPUT_DWARF_DATA2 (asm_out_file, DWARF_VERSION);
5809 fprintf (asm_out_file, "\t%s DWARF Version", ASM_COMMENT_START);
5811 fputc ('\n', asm_out_file);
5812 ASM_OUTPUT_DWARF_DATA (asm_out_file, size_of_line_prolog ());
5814 fprintf (asm_out_file, "\t%s Prolog Length", ASM_COMMENT_START);
5816 fputc ('\n', asm_out_file);
5817 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_MIN_INSTR_LENGTH);
5819 fprintf (asm_out_file, "\t%s Minimum Instruction Length",
5822 fputc ('\n', asm_out_file);
5823 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DWARF_LINE_DEFAULT_IS_STMT_START);
5825 fprintf (asm_out_file, "\t%s Default is_stmt_start flag",
5828 fputc ('\n', asm_out_file);
5829 fprintf (asm_out_file, "\t%s\t%d", ASM_BYTE_OP, DWARF_LINE_BASE);
5831 fprintf (asm_out_file, "\t%s Line Base Value (Special Opcodes)",
5834 fputc ('\n', asm_out_file);
5835 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_RANGE);
5837 fprintf (asm_out_file, "\t%s Line Range Value (Special Opcodes)",
5840 fputc ('\n', asm_out_file);
5841 fprintf (asm_out_file, "\t%s\t%u", ASM_BYTE_OP, DWARF_LINE_OPCODE_BASE);
5843 fprintf (asm_out_file, "\t%s Special Opcode Base", ASM_COMMENT_START);
5845 fputc ('\n', asm_out_file);
5846 for (opc = 1; opc < DWARF_LINE_OPCODE_BASE; ++opc)
5850 case DW_LNS_advance_pc:
5851 case DW_LNS_advance_line:
5852 case DW_LNS_set_file:
5853 case DW_LNS_set_column:
5854 case DW_LNS_fixed_advance_pc:
5861 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, n_op_args);
5863 fprintf (asm_out_file, "\t%s opcode: 0x%x has %d args",
5864 ASM_COMMENT_START, opc, n_op_args);
5865 fputc ('\n', asm_out_file);
5869 fprintf (asm_out_file, "%s Include Directory Table\n", ASM_COMMENT_START);
5871 /* Include directory table is empty, at present */
5872 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5873 fputc ('\n', asm_out_file);
5875 fprintf (asm_out_file, "%s File Name Table\n", ASM_COMMENT_START);
5877 for (ft_index = 1; ft_index < file_table_in_use; ++ft_index)
5881 ASM_OUTPUT_DWARF_STRING (asm_out_file, file_table[ft_index]);
5882 fprintf (asm_out_file, "%s File Entry: 0x%lx",
5883 ASM_COMMENT_START, ft_index);
5887 ASM_OUTPUT_ASCII (asm_out_file,
5888 file_table[ft_index],
5889 (int) strlen (file_table[ft_index]) + 1);
5892 fputc ('\n', asm_out_file);
5894 /* Include directory index */
5896 fputc ('\n', asm_out_file);
5898 /* Modification time */
5900 fputc ('\n', asm_out_file);
5902 /* File length in bytes */
5904 fputc ('\n', asm_out_file);
5907 /* Terminate the file name table */
5908 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5909 fputc ('\n', asm_out_file);
5911 /* We used to set the address register to the first location in the text
5912 section here, but that didn't accomplish anything since we already
5913 have a line note for the opening brace of the first function. */
5915 /* Generate the line number to PC correspondence table, encoded as
5916 a series of state machine operations. */
5919 strcpy (prev_line_label, text_section_label);
5920 for (lt_index = 1; lt_index < line_info_table_in_use; ++lt_index)
5922 register dw_line_info_ref line_info = &line_info_table[lt_index];
5925 /* Disable this optimization for now; GDB wants to see two line notes
5926 at the beginning of a function so it can find the end of the
5929 /* Don't emit anything for redundant notes. Just updating the
5930 address doesn't accomplish anything, because we already assume
5931 that anything after the last address is this line. */
5932 if (line_info->dw_line_num == current_line
5933 && line_info->dw_file_num == current_file)
5937 /* Emit debug info for the address of the current line, choosing
5938 the encoding that uses the least amount of space. */
5939 /* ??? Unfortunately, we have little choice here currently, and must
5940 always use the most general form. Gcc does not know the address
5941 delta itself, so we can't use DW_LNS_advance_pc. There are no known
5942 dwarf2 aware assemblers at this time, so we can't use any special
5943 pseudo ops that would allow the assembler to optimally encode this for
5944 us. Many ports do have length attributes which will give an upper
5945 bound on the address range. We could perhaps use length attributes
5946 to determine when it is safe to use DW_LNS_fixed_advance_pc. */
5947 ASM_GENERATE_INTERNAL_LABEL (line_label, LINE_CODE_LABEL, lt_index);
5950 /* This can handle deltas up to 0xffff. This takes 3 bytes. */
5951 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
5953 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
5956 fputc ('\n', asm_out_file);
5957 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label, prev_line_label);
5958 fputc ('\n', asm_out_file);
5962 /* This can handle any delta. This takes
5963 4+DWARF2_ADDR_SIZE bytes. */
5964 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
5966 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
5968 fputc ('\n', asm_out_file);
5969 output_uleb128 (1 + DWARF2_ADDR_SIZE);
5970 fputc ('\n', asm_out_file);
5971 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
5972 fputc ('\n', asm_out_file);
5973 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
5974 fputc ('\n', asm_out_file);
5976 strcpy (prev_line_label, line_label);
5978 /* Emit debug info for the source file of the current line, if
5979 different from the previous line. */
5980 if (line_info->dw_file_num != current_file)
5982 current_file = line_info->dw_file_num;
5983 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
5985 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
5987 fputc ('\n', asm_out_file);
5988 output_uleb128 (current_file);
5990 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
5992 fputc ('\n', asm_out_file);
5995 /* Emit debug info for the current line number, choosing the encoding
5996 that uses the least amount of space. */
5997 if (line_info->dw_line_num != current_line)
5999 line_offset = line_info->dw_line_num - current_line;
6000 line_delta = line_offset - DWARF_LINE_BASE;
6001 current_line = line_info->dw_line_num;
6002 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6004 /* This can handle deltas from -10 to 234, using the current
6005 definitions of DWARF_LINE_BASE and DWARF_LINE_RANGE. This
6007 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6008 DWARF_LINE_OPCODE_BASE + line_delta);
6010 fprintf (asm_out_file,
6011 "\t%s line %ld", ASM_COMMENT_START, current_line);
6013 fputc ('\n', asm_out_file);
6017 /* This can handle any delta. This takes at least 4 bytes,
6018 depending on the value being encoded. */
6019 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6021 fprintf (asm_out_file, "\t%s advance to line %ld",
6022 ASM_COMMENT_START, current_line);
6024 fputc ('\n', asm_out_file);
6025 output_sleb128 (line_offset);
6026 fputc ('\n', asm_out_file);
6027 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6029 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6030 fputc ('\n', asm_out_file);
6035 /* We still need to start a new row, so output a copy insn. */
6036 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6038 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6039 fputc ('\n', asm_out_file);
6043 /* Emit debug info for the address of the end of the function. */
6046 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6048 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6051 fputc ('\n', asm_out_file);
6052 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, text_end_label, prev_line_label);
6053 fputc ('\n', asm_out_file);
6057 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6059 fprintf (asm_out_file, "\t%s DW_LNE_set_address", ASM_COMMENT_START);
6060 fputc ('\n', asm_out_file);
6061 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6062 fputc ('\n', asm_out_file);
6063 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6064 fputc ('\n', asm_out_file);
6065 ASM_OUTPUT_DWARF_ADDR (asm_out_file, text_end_label);
6066 fputc ('\n', asm_out_file);
6069 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6071 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence", ASM_COMMENT_START);
6073 fputc ('\n', asm_out_file);
6075 fputc ('\n', asm_out_file);
6076 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6077 fputc ('\n', asm_out_file);
6082 for (lt_index = 0; lt_index < separate_line_info_table_in_use;)
6084 register dw_separate_line_info_ref line_info
6085 = &separate_line_info_table[lt_index];
6088 /* Don't emit anything for redundant notes. */
6089 if (line_info->dw_line_num == current_line
6090 && line_info->dw_file_num == current_file
6091 && line_info->function == function)
6095 /* Emit debug info for the address of the current line. If this is
6096 a new function, or the first line of a function, then we need
6097 to handle it differently. */
6098 ASM_GENERATE_INTERNAL_LABEL (line_label, SEPARATE_LINE_CODE_LABEL,
6100 if (function != line_info->function)
6102 function = line_info->function;
6104 /* Set the address register to the first line in the function */
6105 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6107 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6110 fputc ('\n', asm_out_file);
6111 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6112 fputc ('\n', asm_out_file);
6113 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6114 fputc ('\n', asm_out_file);
6115 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6116 fputc ('\n', asm_out_file);
6120 /* ??? See the DW_LNS_advance_pc comment above. */
6123 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6125 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6128 fputc ('\n', asm_out_file);
6129 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6131 fputc ('\n', asm_out_file);
6135 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6137 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6139 fputc ('\n', asm_out_file);
6140 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6141 fputc ('\n', asm_out_file);
6142 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6143 fputc ('\n', asm_out_file);
6144 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6145 fputc ('\n', asm_out_file);
6148 strcpy (prev_line_label, line_label);
6150 /* Emit debug info for the source file of the current line, if
6151 different from the previous line. */
6152 if (line_info->dw_file_num != current_file)
6154 current_file = line_info->dw_file_num;
6155 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_set_file);
6157 fprintf (asm_out_file, "\t%s DW_LNS_set_file", ASM_COMMENT_START);
6159 fputc ('\n', asm_out_file);
6160 output_uleb128 (current_file);
6162 fprintf (asm_out_file, " (\"%s\")", file_table[current_file]);
6164 fputc ('\n', asm_out_file);
6167 /* Emit debug info for the current line number, choosing the encoding
6168 that uses the least amount of space. */
6169 if (line_info->dw_line_num != current_line)
6171 line_offset = line_info->dw_line_num - current_line;
6172 line_delta = line_offset - DWARF_LINE_BASE;
6173 current_line = line_info->dw_line_num;
6174 if (line_delta >= 0 && line_delta < (DWARF_LINE_RANGE - 1))
6176 ASM_OUTPUT_DWARF_DATA1 (asm_out_file,
6177 DWARF_LINE_OPCODE_BASE + line_delta);
6179 fprintf (asm_out_file,
6180 "\t%s line %ld", ASM_COMMENT_START, current_line);
6182 fputc ('\n', asm_out_file);
6186 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_advance_line);
6188 fprintf (asm_out_file, "\t%s advance to line %ld",
6189 ASM_COMMENT_START, current_line);
6191 fputc ('\n', asm_out_file);
6192 output_sleb128 (line_offset);
6193 fputc ('\n', asm_out_file);
6194 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6196 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6197 fputc ('\n', asm_out_file);
6202 /* We still need to start a new row, so output a copy insn. */
6203 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_copy);
6205 fprintf (asm_out_file, "\t%s DW_LNS_copy", ASM_COMMENT_START);
6206 fputc ('\n', asm_out_file);
6214 /* If we're done with a function, end its sequence. */
6215 if (lt_index == separate_line_info_table_in_use
6216 || separate_line_info_table[lt_index].function != function)
6221 /* Emit debug info for the address of the end of the function. */
6222 ASM_GENERATE_INTERNAL_LABEL (line_label, FUNC_END_LABEL, function);
6225 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNS_fixed_advance_pc);
6227 fprintf (asm_out_file, "\t%s DW_LNS_fixed_advance_pc",
6230 fputc ('\n', asm_out_file);
6231 ASM_OUTPUT_DWARF_DELTA2 (asm_out_file, line_label,
6233 fputc ('\n', asm_out_file);
6237 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6239 fprintf (asm_out_file, "\t%s DW_LNE_set_address",
6241 fputc ('\n', asm_out_file);
6242 output_uleb128 (1 + DWARF2_ADDR_SIZE);
6243 fputc ('\n', asm_out_file);
6244 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_set_address);
6245 fputc ('\n', asm_out_file);
6246 ASM_OUTPUT_DWARF_ADDR (asm_out_file, line_label);
6247 fputc ('\n', asm_out_file);
6250 /* Output the marker for the end of this sequence. */
6251 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, 0);
6253 fprintf (asm_out_file, "\t%s DW_LNE_end_sequence",
6256 fputc ('\n', asm_out_file);
6258 fputc ('\n', asm_out_file);
6259 ASM_OUTPUT_DWARF_DATA1 (asm_out_file, DW_LNE_end_sequence);
6260 fputc ('\n', asm_out_file);
6264 /* Output the marker for the end of the line number info. */
6265 ASM_OUTPUT_LABEL (asm_out_file, ".LTEND");
6268 /* Given a pointer to a tree node for some base type, return a pointer to
6269 a DIE that describes the given type.
6271 This routine must only be called for GCC type nodes that correspond to
6272 Dwarf base (fundamental) types. */
6275 base_type_die (type)
6278 register dw_die_ref base_type_result;
6279 register const char *type_name;
6280 register enum dwarf_type encoding;
6281 register tree name = TYPE_NAME (type);
6283 if (TREE_CODE (type) == ERROR_MARK
6284 || TREE_CODE (type) == VOID_TYPE)
6289 if (TREE_CODE (name) == TYPE_DECL)
6290 name = DECL_NAME (name);
6292 type_name = IDENTIFIER_POINTER (name);
6295 type_name = "__unknown__";
6297 switch (TREE_CODE (type))
6300 /* Carefully distinguish the C character types, without messing
6301 up if the language is not C. Note that we check only for the names
6302 that contain spaces; other names might occur by coincidence in other
6304 if (! (TYPE_PRECISION (type) == CHAR_TYPE_SIZE
6305 && (type == char_type_node
6306 || ! strcmp (type_name, "signed char")
6307 || ! strcmp (type_name, "unsigned char"))))
6309 if (TREE_UNSIGNED (type))
6310 encoding = DW_ATE_unsigned;
6312 encoding = DW_ATE_signed;
6315 /* else fall through. */
6318 /* GNU Pascal/Ada CHAR type. Not used in C. */
6319 if (TREE_UNSIGNED (type))
6320 encoding = DW_ATE_unsigned_char;
6322 encoding = DW_ATE_signed_char;
6326 encoding = DW_ATE_float;
6329 /* Dwarf2 doesn't know anything about complex ints, so use
6330 a user defined type for it. */
6332 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
6333 encoding = DW_ATE_complex_float;
6335 encoding = DW_ATE_lo_user;
6339 /* GNU FORTRAN/Ada/C++ BOOLEAN type. */
6340 encoding = DW_ATE_boolean;
6344 abort (); /* No other TREE_CODEs are Dwarf fundamental types. */
6347 base_type_result = new_die (DW_TAG_base_type, comp_unit_die);
6348 if (demangle_name_func)
6349 type_name = (*demangle_name_func) (type_name);
6351 add_AT_string (base_type_result, DW_AT_name, type_name);
6352 add_AT_unsigned (base_type_result, DW_AT_byte_size,
6353 int_size_in_bytes (type));
6354 add_AT_unsigned (base_type_result, DW_AT_encoding, encoding);
6356 return base_type_result;
6359 /* Given a pointer to an arbitrary ..._TYPE tree node, return a pointer to
6360 the Dwarf "root" type for the given input type. The Dwarf "root" type of
6361 a given type is generally the same as the given type, except that if the
6362 given type is a pointer or reference type, then the root type of the given
6363 type is the root type of the "basis" type for the pointer or reference
6364 type. (This definition of the "root" type is recursive.) Also, the root
6365 type of a `const' qualified type or a `volatile' qualified type is the
6366 root type of the given type without the qualifiers. */
6372 if (TREE_CODE (type) == ERROR_MARK)
6373 return error_mark_node;
6375 switch (TREE_CODE (type))
6378 return error_mark_node;
6381 case REFERENCE_TYPE:
6382 return type_main_variant (root_type (TREE_TYPE (type)));
6385 return type_main_variant (type);
6389 /* Given a pointer to an arbitrary ..._TYPE tree node, return non-zero if the
6390 given input type is a Dwarf "fundamental" type. Otherwise return null. */
6396 switch (TREE_CODE (type))
6411 case QUAL_UNION_TYPE:
6416 case REFERENCE_TYPE:
6429 /* Given a pointer to an arbitrary ..._TYPE tree node, return a debugging
6430 entry that chains various modifiers in front of the given type. */
6433 modified_type_die (type, is_const_type, is_volatile_type, context_die)
6435 register int is_const_type;
6436 register int is_volatile_type;
6437 register dw_die_ref context_die;
6439 register enum tree_code code = TREE_CODE (type);
6440 register dw_die_ref mod_type_die = NULL;
6441 register dw_die_ref sub_die = NULL;
6442 register tree item_type = NULL;
6444 if (code != ERROR_MARK)
6446 type = build_type_variant (type, is_const_type, is_volatile_type);
6448 mod_type_die = lookup_type_die (type);
6450 return mod_type_die;
6452 /* Handle C typedef types. */
6453 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
6454 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
6456 tree dtype = TREE_TYPE (TYPE_NAME (type));
6459 /* For a named type, use the typedef. */
6460 gen_type_die (type, context_die);
6461 mod_type_die = lookup_type_die (type);
6464 else if (is_const_type < TYPE_READONLY (dtype)
6465 || is_volatile_type < TYPE_VOLATILE (dtype))
6466 /* cv-unqualified version of named type. Just use the unnamed
6467 type to which it refers. */
6469 = modified_type_die (DECL_ORIGINAL_TYPE (TYPE_NAME (type)),
6470 is_const_type, is_volatile_type,
6472 /* Else cv-qualified version of named type; fall through. */
6478 else if (is_const_type)
6480 mod_type_die = new_die (DW_TAG_const_type, comp_unit_die);
6481 sub_die = modified_type_die (type, 0, is_volatile_type, context_die);
6483 else if (is_volatile_type)
6485 mod_type_die = new_die (DW_TAG_volatile_type, comp_unit_die);
6486 sub_die = modified_type_die (type, 0, 0, context_die);
6488 else if (code == POINTER_TYPE)
6490 mod_type_die = new_die (DW_TAG_pointer_type, comp_unit_die);
6491 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6493 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6495 item_type = TREE_TYPE (type);
6497 else if (code == REFERENCE_TYPE)
6499 mod_type_die = new_die (DW_TAG_reference_type, comp_unit_die);
6500 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
6502 add_AT_unsigned (mod_type_die, DW_AT_address_class, 0);
6504 item_type = TREE_TYPE (type);
6506 else if (is_base_type (type))
6507 mod_type_die = base_type_die (type);
6510 gen_type_die (type, context_die);
6512 /* We have to get the type_main_variant here (and pass that to the
6513 `lookup_type_die' routine) because the ..._TYPE node we have
6514 might simply be a *copy* of some original type node (where the
6515 copy was created to help us keep track of typedef names) and
6516 that copy might have a different TYPE_UID from the original
6518 mod_type_die = lookup_type_die (type_main_variant (type));
6519 if (mod_type_die == NULL)
6524 equate_type_number_to_die (type, mod_type_die);
6526 /* We must do this after the equate_type_number_to_die call, in case
6527 this is a recursive type. This ensures that the modified_type_die
6528 recursion will terminate even if the type is recursive. Recursive
6529 types are possible in Ada. */
6530 sub_die = modified_type_die (item_type,
6531 TYPE_READONLY (item_type),
6532 TYPE_VOLATILE (item_type),
6535 if (sub_die != NULL)
6536 add_AT_die_ref (mod_type_die, DW_AT_type, sub_die);
6538 return mod_type_die;
6541 /* Given a pointer to an arbitrary ..._TYPE tree node, return true if it is
6542 an enumerated type. */
6548 return TREE_CODE (type) == ENUMERAL_TYPE;
6551 /* Return the register number described by a given RTL node. */
6557 register unsigned regno = REGNO (rtl);
6559 if (regno >= FIRST_PSEUDO_REGISTER)
6561 warning ("internal regno botch: regno = %d\n", regno);
6565 regno = DBX_REGISTER_NUMBER (regno);
6569 /* Return a location descriptor that designates a machine register. */
6571 static dw_loc_descr_ref
6572 reg_loc_descriptor (rtl)
6575 register dw_loc_descr_ref loc_result = NULL;
6576 register unsigned reg = reg_number (rtl);
6579 loc_result = new_loc_descr (DW_OP_reg0 + reg, 0, 0);
6581 loc_result = new_loc_descr (DW_OP_regx, reg, 0);
6586 /* Return a location descriptor that designates a base+offset location. */
6588 static dw_loc_descr_ref
6589 based_loc_descr (reg, offset)
6593 register dw_loc_descr_ref loc_result;
6594 /* For the "frame base", we use the frame pointer or stack pointer
6595 registers, since the RTL for local variables is relative to one of
6597 register unsigned fp_reg = DBX_REGISTER_NUMBER (frame_pointer_needed
6598 ? HARD_FRAME_POINTER_REGNUM
6599 : STACK_POINTER_REGNUM);
6602 loc_result = new_loc_descr (DW_OP_fbreg, offset, 0);
6604 loc_result = new_loc_descr (DW_OP_breg0 + reg, offset, 0);
6606 loc_result = new_loc_descr (DW_OP_bregx, reg, offset);
6611 /* Return true if this RTL expression describes a base+offset calculation. */
6617 return (GET_CODE (rtl) == PLUS
6618 && ((GET_CODE (XEXP (rtl, 0)) == REG
6619 && GET_CODE (XEXP (rtl, 1)) == CONST_INT)));
6622 /* The following routine converts the RTL for a variable or parameter
6623 (resident in memory) into an equivalent Dwarf representation of a
6624 mechanism for getting the address of that same variable onto the top of a
6625 hypothetical "address evaluation" stack.
6627 When creating memory location descriptors, we are effectively transforming
6628 the RTL for a memory-resident object into its Dwarf postfix expression
6629 equivalent. This routine recursively descends an RTL tree, turning
6630 it into Dwarf postfix code as it goes.
6632 MODE is the mode of the memory reference, needed to handle some
6633 autoincrement addressing modes. */
6635 static dw_loc_descr_ref
6636 mem_loc_descriptor (rtl, mode)
6638 enum machine_mode mode;
6640 dw_loc_descr_ref mem_loc_result = NULL;
6641 /* Note that for a dynamically sized array, the location we will generate a
6642 description of here will be the lowest numbered location which is
6643 actually within the array. That's *not* necessarily the same as the
6644 zeroth element of the array. */
6646 #ifdef ASM_SIMPLIFY_DWARF_ADDR
6647 rtl = ASM_SIMPLIFY_DWARF_ADDR (rtl);
6650 switch (GET_CODE (rtl))
6654 /* POST_INC and POST_DEC can be handled just like a SUBREG. So we
6655 just fall into the SUBREG code. */
6660 /* The case of a subreg may arise when we have a local (register)
6661 variable or a formal (register) parameter which doesn't quite fill
6662 up an entire register. For now, just assume that it is
6663 legitimate to make the Dwarf info refer to the whole register which
6664 contains the given subreg. */
6665 rtl = XEXP (rtl, 0);
6670 /* Whenever a register number forms a part of the description of the
6671 method for calculating the (dynamic) address of a memory resident
6672 object, DWARF rules require the register number be referred to as
6673 a "base register". This distinction is not based in any way upon
6674 what category of register the hardware believes the given register
6675 belongs to. This is strictly DWARF terminology we're dealing with
6676 here. Note that in cases where the location of a memory-resident
6677 data object could be expressed as: OP_ADD (OP_BASEREG (basereg),
6678 OP_CONST (0)) the actual DWARF location descriptor that we generate
6679 may just be OP_BASEREG (basereg). This may look deceptively like
6680 the object in question was allocated to a register (rather than in
6681 memory) so DWARF consumers need to be aware of the subtle
6682 distinction between OP_REG and OP_BASEREG. */
6683 mem_loc_result = based_loc_descr (reg_number (rtl), 0);
6687 mem_loc_result = mem_loc_descriptor (XEXP (rtl, 0), mode);
6688 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_deref, 0, 0));
6692 /* Some ports can transform a symbol ref into a label ref, because
6693 the symbol ref is too far away and has to be dumped into a constant
6697 mem_loc_result = new_loc_descr (DW_OP_addr, 0, 0);
6698 mem_loc_result->dw_loc_oprnd1.val_class = dw_val_class_addr;
6699 mem_loc_result->dw_loc_oprnd1.v.val_addr = save_rtx (rtl);
6704 /* Turn these into a PLUS expression and fall into the PLUS code
6706 rtl = gen_rtx_PLUS (word_mode, XEXP (rtl, 0),
6707 GEN_INT (GET_CODE (rtl) == PRE_INC
6708 ? GET_MODE_UNIT_SIZE (mode)
6709 : -GET_MODE_UNIT_SIZE (mode)));
6714 if (is_based_loc (rtl))
6715 mem_loc_result = based_loc_descr (reg_number (XEXP (rtl, 0)),
6716 INTVAL (XEXP (rtl, 1)));
6719 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0),
6721 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1),
6723 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_plus, 0, 0));
6728 /* If a pseudo-reg is optimized away, it is possible for it to
6729 be replaced with a MEM containing a multiply. */
6730 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 0), mode));
6731 add_loc_descr (&mem_loc_result, mem_loc_descriptor (XEXP (rtl, 1), mode));
6732 add_loc_descr (&mem_loc_result, new_loc_descr (DW_OP_mul, 0, 0));
6736 mem_loc_result = new_loc_descr (DW_OP_constu, INTVAL (rtl), 0);
6743 return mem_loc_result;
6746 /* Return a descriptor that describes the concatenation of two locations.
6747 This is typically a complex variable. */
6749 static dw_loc_descr_ref
6750 concat_loc_descriptor (x0, x1)
6751 register rtx x0, x1;
6753 dw_loc_descr_ref cc_loc_result = NULL;
6755 if (!is_pseudo_reg (x0)
6756 && (GET_CODE (x0) != MEM || !is_pseudo_reg (XEXP (x0, 0))))
6757 add_loc_descr (&cc_loc_result, loc_descriptor (x0));
6758 add_loc_descr (&cc_loc_result,
6759 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x0)), 0));
6761 if (!is_pseudo_reg (x1)
6762 && (GET_CODE (x1) != MEM || !is_pseudo_reg (XEXP (x1, 0))))
6763 add_loc_descr (&cc_loc_result, loc_descriptor (x1));
6764 add_loc_descr (&cc_loc_result,
6765 new_loc_descr (DW_OP_piece, GET_MODE_SIZE (GET_MODE (x1)), 0));
6767 return cc_loc_result;
6770 /* Output a proper Dwarf location descriptor for a variable or parameter
6771 which is either allocated in a register or in a memory location. For a
6772 register, we just generate an OP_REG and the register number. For a
6773 memory location we provide a Dwarf postfix expression describing how to
6774 generate the (dynamic) address of the object onto the address stack. */
6776 static dw_loc_descr_ref
6777 loc_descriptor (rtl)
6780 dw_loc_descr_ref loc_result = NULL;
6781 switch (GET_CODE (rtl))
6784 /* The case of a subreg may arise when we have a local (register)
6785 variable or a formal (register) parameter which doesn't quite fill
6786 up an entire register. For now, just assume that it is
6787 legitimate to make the Dwarf info refer to the whole register which
6788 contains the given subreg. */
6789 rtl = XEXP (rtl, 0);
6794 loc_result = reg_loc_descriptor (rtl);
6798 loc_result = mem_loc_descriptor (XEXP (rtl, 0), GET_MODE (rtl));
6802 loc_result = concat_loc_descriptor (XEXP (rtl, 0), XEXP (rtl, 1));
6812 /* Given a value, round it up to the lowest multiple of `boundary'
6813 which is not less than the value itself. */
6815 static inline HOST_WIDE_INT
6816 ceiling (value, boundary)
6817 HOST_WIDE_INT value;
6818 unsigned int boundary;
6820 return (((value + boundary - 1) / boundary) * boundary);
6823 /* Given a pointer to what is assumed to be a FIELD_DECL node, return a
6824 pointer to the declared type for the relevant field variable, or return
6825 `integer_type_node' if the given node turns out to be an
6834 if (TREE_CODE (decl) == ERROR_MARK)
6835 return integer_type_node;
6837 type = DECL_BIT_FIELD_TYPE (decl);
6838 if (type == NULL_TREE)
6839 type = TREE_TYPE (decl);
6844 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6845 node, return the alignment in bits for the type, or else return
6846 BITS_PER_WORD if the node actually turns out to be an
6849 static inline unsigned
6850 simple_type_align_in_bits (type)
6853 return (TREE_CODE (type) != ERROR_MARK) ? TYPE_ALIGN (type) : BITS_PER_WORD;
6856 /* Given a pointer to a tree node, assumed to be some kind of a ..._TYPE
6857 node, return the size in bits for the type if it is a constant, or else
6858 return the alignment for the type if the type's size is not constant, or
6859 else return BITS_PER_WORD if the type actually turns out to be an
6862 static inline unsigned HOST_WIDE_INT
6863 simple_type_size_in_bits (type)
6866 if (TREE_CODE (type) == ERROR_MARK)
6867 return BITS_PER_WORD;
6870 register tree type_size_tree = TYPE_SIZE (type);
6872 if (! host_integerp (type_size_tree, 1))
6873 return TYPE_ALIGN (type);
6875 return tree_low_cst (type_size_tree, 1);
6879 /* Given a pointer to what is assumed to be a FIELD_DECL node, compute and
6880 return the byte offset of the lowest addressed byte of the "containing
6881 object" for the given FIELD_DECL, or return 0 if we are unable to
6882 determine what that offset is, either because the argument turns out to
6883 be a pointer to an ERROR_MARK node, or because the offset is actually
6884 variable. (We can't handle the latter case just yet). */
6886 static HOST_WIDE_INT
6887 field_byte_offset (decl)
6890 unsigned int type_align_in_bytes;
6891 unsigned int type_align_in_bits;
6892 unsigned HOST_WIDE_INT type_size_in_bits;
6893 HOST_WIDE_INT object_offset_in_align_units;
6894 HOST_WIDE_INT object_offset_in_bits;
6895 HOST_WIDE_INT object_offset_in_bytes;
6897 tree field_size_tree;
6898 HOST_WIDE_INT bitpos_int;
6899 HOST_WIDE_INT deepest_bitpos;
6900 unsigned HOST_WIDE_INT field_size_in_bits;
6902 if (TREE_CODE (decl) == ERROR_MARK)
6905 if (TREE_CODE (decl) != FIELD_DECL)
6908 type = field_type (decl);
6909 field_size_tree = DECL_SIZE (decl);
6911 /* If there was an error, the size could be zero. */
6912 if (! field_size_tree)
6920 /* We cannot yet cope with fields whose positions are variable, so
6921 for now, when we see such things, we simply return 0. Someday, we may
6922 be able to handle such cases, but it will be damn difficult. */
6923 if (! host_integerp (bit_position (decl), 0))
6926 bitpos_int = int_bit_position (decl);
6928 /* If we don't know the size of the field, pretend it's a full word. */
6929 if (host_integerp (field_size_tree, 1))
6930 field_size_in_bits = tree_low_cst (field_size_tree, 1);
6932 field_size_in_bits = BITS_PER_WORD;
6934 type_size_in_bits = simple_type_size_in_bits (type);
6935 type_align_in_bits = simple_type_align_in_bits (type);
6936 type_align_in_bytes = type_align_in_bits / BITS_PER_UNIT;
6938 /* Note that the GCC front-end doesn't make any attempt to keep track of
6939 the starting bit offset (relative to the start of the containing
6940 structure type) of the hypothetical "containing object" for a bit-
6941 field. Thus, when computing the byte offset value for the start of the
6942 "containing object" of a bit-field, we must deduce this information on
6943 our own. This can be rather tricky to do in some cases. For example,
6944 handling the following structure type definition when compiling for an
6945 i386/i486 target (which only aligns long long's to 32-bit boundaries)
6948 struct S { int field1; long long field2:31; };
6950 Fortunately, there is a simple rule-of-thumb which can be
6951 used in such cases. When compiling for an i386/i486, GCC will allocate
6952 8 bytes for the structure shown above. It decides to do this based upon
6953 one simple rule for bit-field allocation. Quite simply, GCC allocates
6954 each "containing object" for each bit-field at the first (i.e. lowest
6955 addressed) legitimate alignment boundary (based upon the required
6956 minimum alignment for the declared type of the field) which it can
6957 possibly use, subject to the condition that there is still enough
6958 available space remaining in the containing object (when allocated at
6959 the selected point) to fully accommodate all of the bits of the
6960 bit-field itself. This simple rule makes it obvious why GCC allocates
6961 8 bytes for each object of the structure type shown above. When looking
6962 for a place to allocate the "containing object" for `field2', the
6963 compiler simply tries to allocate a 64-bit "containing object" at each
6964 successive 32-bit boundary (starting at zero) until it finds a place to
6965 allocate that 64- bit field such that at least 31 contiguous (and
6966 previously unallocated) bits remain within that selected 64 bit field.
6967 (As it turns out, for the example above, the compiler finds that it is
6968 OK to allocate the "containing object" 64-bit field at bit-offset zero
6969 within the structure type.) Here we attempt to work backwards from the
6970 limited set of facts we're given, and we try to deduce from those facts,
6971 where GCC must have believed that the containing object started (within
6972 the structure type). The value we deduce is then used (by the callers of
6973 this routine) to generate DW_AT_location and DW_AT_bit_offset attributes
6974 for fields (both bit-fields and, in the case of DW_AT_location, regular
6977 /* Figure out the bit-distance from the start of the structure to the
6978 "deepest" bit of the bit-field. */
6979 deepest_bitpos = bitpos_int + field_size_in_bits;
6981 /* This is the tricky part. Use some fancy footwork to deduce where the
6982 lowest addressed bit of the containing object must be. */
6983 object_offset_in_bits
6984 = ceiling (deepest_bitpos, type_align_in_bits) - type_size_in_bits;
6986 /* Compute the offset of the containing object in "alignment units". */
6987 object_offset_in_align_units = object_offset_in_bits / type_align_in_bits;
6989 /* Compute the offset of the containing object in bytes. */
6990 object_offset_in_bytes = object_offset_in_align_units * type_align_in_bytes;
6992 return object_offset_in_bytes;
6995 /* The following routines define various Dwarf attributes and any data
6996 associated with them. */
6998 /* Add a location description attribute value to a DIE.
7000 This emits location attributes suitable for whole variables and
7001 whole parameters. Note that the location attributes for struct fields are
7002 generated by the routine `data_member_location_attribute' below. */
7005 add_AT_location_description (die, attr_kind, rtl)
7007 enum dwarf_attribute attr_kind;
7010 /* Handle a special case. If we are about to output a location descriptor
7011 for a variable or parameter which has been optimized out of existence,
7012 don't do that. A variable which has been optimized out
7013 of existence will have a DECL_RTL value which denotes a pseudo-reg.
7014 Currently, in some rare cases, variables can have DECL_RTL values which
7015 look like (MEM (REG pseudo-reg#)). These cases are due to bugs
7016 elsewhere in the compiler. We treat such cases as if the variable(s) in
7017 question had been optimized out of existence. */
7019 if (is_pseudo_reg (rtl)
7020 || (GET_CODE (rtl) == MEM
7021 && is_pseudo_reg (XEXP (rtl, 0)))
7022 /* This can happen for a PARM_DECL with a DECL_INCOMING_RTL which
7023 references the internal argument pointer (a pseudo) in a function
7024 where all references to the internal argument pointer were
7025 eliminated via the optimizers. */
7026 || (GET_CODE (rtl) == MEM
7027 && GET_CODE (XEXP (rtl, 0)) == PLUS
7028 && is_pseudo_reg (XEXP (XEXP (rtl, 0), 0)))
7029 || (GET_CODE (rtl) == CONCAT
7030 && is_pseudo_reg (XEXP (rtl, 0))
7031 && is_pseudo_reg (XEXP (rtl, 1))))
7034 add_AT_loc (die, attr_kind, loc_descriptor (rtl));
7037 /* Attach the specialized form of location attribute used for data
7038 members of struct and union types. In the special case of a
7039 FIELD_DECL node which represents a bit-field, the "offset" part
7040 of this special location descriptor must indicate the distance
7041 in bytes from the lowest-addressed byte of the containing struct
7042 or union type to the lowest-addressed byte of the "containing
7043 object" for the bit-field. (See the `field_byte_offset' function
7044 above).. For any given bit-field, the "containing object" is a
7045 hypothetical object (of some integral or enum type) within which
7046 the given bit-field lives. The type of this hypothetical
7047 "containing object" is always the same as the declared type of
7048 the individual bit-field itself (for GCC anyway... the DWARF
7049 spec doesn't actually mandate this). Note that it is the size
7050 (in bytes) of the hypothetical "containing object" which will
7051 be given in the DW_AT_byte_size attribute for this bit-field.
7052 (See the `byte_size_attribute' function below.) It is also used
7053 when calculating the value of the DW_AT_bit_offset attribute.
7054 (See the `bit_offset_attribute' function below). */
7057 add_data_member_location_attribute (die, decl)
7058 register dw_die_ref die;
7061 register unsigned long offset;
7062 register dw_loc_descr_ref loc_descr;
7063 register enum dwarf_location_atom op;
7065 if (TREE_CODE (decl) == TREE_VEC)
7066 offset = tree_low_cst (BINFO_OFFSET (decl), 0);
7068 offset = field_byte_offset (decl);
7070 /* The DWARF2 standard says that we should assume that the structure address
7071 is already on the stack, so we can specify a structure field address
7072 by using DW_OP_plus_uconst. */
7074 #ifdef MIPS_DEBUGGING_INFO
7075 /* ??? The SGI dwarf reader does not handle the DW_OP_plus_uconst operator
7076 correctly. It works only if we leave the offset on the stack. */
7079 op = DW_OP_plus_uconst;
7082 loc_descr = new_loc_descr (op, offset, 0);
7083 add_AT_loc (die, DW_AT_data_member_location, loc_descr);
7086 /* Attach an DW_AT_const_value attribute for a variable or a parameter which
7087 does not have a "location" either in memory or in a register. These
7088 things can arise in GNU C when a constant is passed as an actual parameter
7089 to an inlined function. They can also arise in C++ where declared
7090 constants do not necessarily get memory "homes". */
7093 add_const_value_attribute (die, rtl)
7094 register dw_die_ref die;
7097 switch (GET_CODE (rtl))
7100 /* Note that a CONST_INT rtx could represent either an integer or a
7101 floating-point constant. A CONST_INT is used whenever the constant
7102 will fit into a single word. In all such cases, the original mode
7103 of the constant value is wiped out, and the CONST_INT rtx is
7104 assigned VOIDmode. */
7105 add_AT_unsigned (die, DW_AT_const_value, (unsigned) INTVAL (rtl));
7109 /* Note that a CONST_DOUBLE rtx could represent either an integer or a
7110 floating-point constant. A CONST_DOUBLE is used whenever the
7111 constant requires more than one word in order to be adequately
7112 represented. We output CONST_DOUBLEs as blocks. */
7114 register enum machine_mode mode = GET_MODE (rtl);
7116 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
7118 register unsigned length = GET_MODE_SIZE (mode) / sizeof (long);
7122 REAL_VALUE_FROM_CONST_DOUBLE (rv, rtl);
7126 REAL_VALUE_TO_TARGET_SINGLE (rv, array[0]);
7130 REAL_VALUE_TO_TARGET_DOUBLE (rv, array);
7135 REAL_VALUE_TO_TARGET_LONG_DOUBLE (rv, array);
7142 add_AT_float (die, DW_AT_const_value, length, array);
7145 add_AT_long_long (die, DW_AT_const_value,
7146 CONST_DOUBLE_HIGH (rtl), CONST_DOUBLE_LOW (rtl));
7151 add_AT_string (die, DW_AT_const_value, XSTR (rtl, 0));
7157 add_AT_addr (die, DW_AT_const_value, save_rtx (rtl));
7161 /* In cases where an inlined instance of an inline function is passed
7162 the address of an `auto' variable (which is local to the caller) we
7163 can get a situation where the DECL_RTL of the artificial local
7164 variable (for the inlining) which acts as a stand-in for the
7165 corresponding formal parameter (of the inline function) will look
7166 like (plus:SI (reg:SI FRAME_PTR) (const_int ...)). This is not
7167 exactly a compile-time constant expression, but it isn't the address
7168 of the (artificial) local variable either. Rather, it represents the
7169 *value* which the artificial local variable always has during its
7170 lifetime. We currently have no way to represent such quasi-constant
7171 values in Dwarf, so for now we just punt and generate nothing. */
7175 /* No other kinds of rtx should be possible here. */
7181 /* Generate *either* an DW_AT_location attribute or else an DW_AT_const_value
7182 data attribute for a variable or a parameter. We generate the
7183 DW_AT_const_value attribute only in those cases where the given variable
7184 or parameter does not have a true "location" either in memory or in a
7185 register. This can happen (for example) when a constant is passed as an
7186 actual argument in a call to an inline function. (It's possible that
7187 these things can crop up in other ways also.) Note that one type of
7188 constant value which can be passed into an inlined function is a constant
7189 pointer. This can happen for example if an actual argument in an inlined
7190 function call evaluates to a compile-time constant address. */
7193 add_location_or_const_value_attribute (die, decl)
7194 register dw_die_ref die;
7198 register tree declared_type;
7199 register tree passed_type;
7201 if (TREE_CODE (decl) == ERROR_MARK)
7204 if (TREE_CODE (decl) != VAR_DECL && TREE_CODE (decl) != PARM_DECL)
7207 /* Here we have to decide where we are going to say the parameter "lives"
7208 (as far as the debugger is concerned). We only have a couple of
7209 choices. GCC provides us with DECL_RTL and with DECL_INCOMING_RTL.
7211 DECL_RTL normally indicates where the parameter lives during most of the
7212 activation of the function. If optimization is enabled however, this
7213 could be either NULL or else a pseudo-reg. Both of those cases indicate
7214 that the parameter doesn't really live anywhere (as far as the code
7215 generation parts of GCC are concerned) during most of the function's
7216 activation. That will happen (for example) if the parameter is never
7217 referenced within the function.
7219 We could just generate a location descriptor here for all non-NULL
7220 non-pseudo values of DECL_RTL and ignore all of the rest, but we can be
7221 a little nicer than that if we also consider DECL_INCOMING_RTL in cases
7222 where DECL_RTL is NULL or is a pseudo-reg.
7224 Note however that we can only get away with using DECL_INCOMING_RTL as
7225 a backup substitute for DECL_RTL in certain limited cases. In cases
7226 where DECL_ARG_TYPE (decl) indicates the same type as TREE_TYPE (decl),
7227 we can be sure that the parameter was passed using the same type as it is
7228 declared to have within the function, and that its DECL_INCOMING_RTL
7229 points us to a place where a value of that type is passed.
7231 In cases where DECL_ARG_TYPE (decl) and TREE_TYPE (decl) are different,
7232 we cannot (in general) use DECL_INCOMING_RTL as a substitute for DECL_RTL
7233 because in these cases DECL_INCOMING_RTL points us to a value of some
7234 type which is *different* from the type of the parameter itself. Thus,
7235 if we tried to use DECL_INCOMING_RTL to generate a location attribute in
7236 such cases, the debugger would end up (for example) trying to fetch a
7237 `float' from a place which actually contains the first part of a
7238 `double'. That would lead to really incorrect and confusing
7239 output at debug-time.
7241 So, in general, we *do not* use DECL_INCOMING_RTL as a backup for DECL_RTL
7242 in cases where DECL_ARG_TYPE (decl) != TREE_TYPE (decl). There
7243 are a couple of exceptions however. On little-endian machines we can
7244 get away with using DECL_INCOMING_RTL even when DECL_ARG_TYPE (decl) is
7245 not the same as TREE_TYPE (decl), but only when DECL_ARG_TYPE (decl) is
7246 an integral type that is smaller than TREE_TYPE (decl). These cases arise
7247 when (on a little-endian machine) a non-prototyped function has a
7248 parameter declared to be of type `short' or `char'. In such cases,
7249 TREE_TYPE (decl) will be `short' or `char', DECL_ARG_TYPE (decl) will
7250 be `int', and DECL_INCOMING_RTL will point to the lowest-order byte of the
7251 passed `int' value. If the debugger then uses that address to fetch
7252 a `short' or a `char' (on a little-endian machine) the result will be
7253 the correct data, so we allow for such exceptional cases below.
7255 Note that our goal here is to describe the place where the given formal
7256 parameter lives during most of the function's activation (i.e. between
7257 the end of the prologue and the start of the epilogue). We'll do that
7258 as best as we can. Note however that if the given formal parameter is
7259 modified sometime during the execution of the function, then a stack
7260 backtrace (at debug-time) will show the function as having been
7261 called with the *new* value rather than the value which was
7262 originally passed in. This happens rarely enough that it is not
7263 a major problem, but it *is* a problem, and I'd like to fix it.
7265 A future version of dwarf2out.c may generate two additional
7266 attributes for any given DW_TAG_formal_parameter DIE which will
7267 describe the "passed type" and the "passed location" for the
7268 given formal parameter in addition to the attributes we now
7269 generate to indicate the "declared type" and the "active
7270 location" for each parameter. This additional set of attributes
7271 could be used by debuggers for stack backtraces. Separately, note
7272 that sometimes DECL_RTL can be NULL and DECL_INCOMING_RTL can be
7273 NULL also. This happens (for example) for inlined-instances of
7274 inline function formal parameters which are never referenced.
7275 This really shouldn't be happening. All PARM_DECL nodes should
7276 get valid non-NULL DECL_INCOMING_RTL values, but integrate.c
7277 doesn't currently generate these values for inlined instances of
7278 inline function parameters, so when we see such cases, we are
7279 just out-of-luck for the time being (until integrate.c
7282 /* Use DECL_RTL as the "location" unless we find something better. */
7283 rtl = DECL_RTL (decl);
7285 if (TREE_CODE (decl) == PARM_DECL)
7287 if (rtl == NULL_RTX || is_pseudo_reg (rtl))
7289 declared_type = type_main_variant (TREE_TYPE (decl));
7290 passed_type = type_main_variant (DECL_ARG_TYPE (decl));
7292 /* This decl represents a formal parameter which was optimized out.
7293 Note that DECL_INCOMING_RTL may be NULL in here, but we handle
7294 all* cases where (rtl == NULL_RTX) just below. */
7295 if (declared_type == passed_type)
7296 rtl = DECL_INCOMING_RTL (decl);
7297 else if (! BYTES_BIG_ENDIAN
7298 && TREE_CODE (declared_type) == INTEGER_TYPE
7299 && (GET_MODE_SIZE (TYPE_MODE (declared_type))
7300 <= GET_MODE_SIZE (TYPE_MODE (passed_type))))
7301 rtl = DECL_INCOMING_RTL (decl);
7304 /* If the parm was passed in registers, but lives on the stack, then
7305 make a big endian correction if the mode of the type of the
7306 parameter is not the same as the mode of the rtl. */
7307 /* ??? This is the same series of checks that are made in dbxout.c before
7308 we reach the big endian correction code there. It isn't clear if all
7309 of these checks are necessary here, but keeping them all is the safe
7311 else if (GET_CODE (rtl) == MEM
7312 && XEXP (rtl, 0) != const0_rtx
7313 && ! CONSTANT_P (XEXP (rtl, 0))
7314 /* Not passed in memory. */
7315 && GET_CODE (DECL_INCOMING_RTL (decl)) != MEM
7316 /* Not passed by invisible reference. */
7317 && (GET_CODE (XEXP (rtl, 0)) != REG
7318 || REGNO (XEXP (rtl, 0)) == HARD_FRAME_POINTER_REGNUM
7319 || REGNO (XEXP (rtl, 0)) == STACK_POINTER_REGNUM
7320 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
7321 || REGNO (XEXP (rtl, 0)) == ARG_POINTER_REGNUM
7324 /* Big endian correction check. */
7326 && TYPE_MODE (TREE_TYPE (decl)) != GET_MODE (rtl)
7327 && (GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl)))
7330 int offset = (UNITS_PER_WORD
7331 - GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (decl))));
7332 rtl = gen_rtx_MEM (TYPE_MODE (TREE_TYPE (decl)),
7333 plus_constant (XEXP (rtl, 0), offset));
7337 if (rtl == NULL_RTX)
7340 rtl = eliminate_regs (rtl, 0, NULL_RTX);
7341 #ifdef LEAF_REG_REMAP
7342 if (current_function_uses_only_leaf_regs)
7343 leaf_renumber_regs_insn (rtl);
7346 switch (GET_CODE (rtl))
7349 /* The address of a variable that was optimized away; don't emit
7360 /* DECL_RTL could be (plus (reg ...) (const_int ...)) */
7361 add_const_value_attribute (die, rtl);
7368 add_AT_location_description (die, DW_AT_location, rtl);
7376 /* Generate an DW_AT_name attribute given some string value to be included as
7377 the value of the attribute. */
7380 add_name_attribute (die, name_string)
7381 register dw_die_ref die;
7382 register const char *name_string;
7384 if (name_string != NULL && *name_string != 0)
7386 if (demangle_name_func)
7387 name_string = (*demangle_name_func) (name_string);
7389 add_AT_string (die, DW_AT_name, name_string);
7393 /* Given a tree node describing an array bound (either lower or upper) output
7394 a representation for that bound. */
7397 add_bound_info (subrange_die, bound_attr, bound)
7398 register dw_die_ref subrange_die;
7399 register enum dwarf_attribute bound_attr;
7400 register tree bound;
7402 /* If this is an Ada unconstrained array type, then don't emit any debug
7403 info because the array bounds are unknown. They are parameterized when
7404 the type is instantiated. */
7405 if (contains_placeholder_p (bound))
7408 switch (TREE_CODE (bound))
7413 /* All fixed-bounds are represented by INTEGER_CST nodes. */
7415 if (! host_integerp (bound, 0)
7416 || (bound_attr == DW_AT_lower_bound
7417 && (((is_c_family () || is_java ()) && integer_zerop (bound))
7418 || (is_fortran () && integer_onep (bound)))))
7419 /* use the default */
7422 add_AT_unsigned (subrange_die, bound_attr, tree_low_cst (bound, 0));
7427 case NON_LVALUE_EXPR:
7428 add_bound_info (subrange_die, bound_attr, TREE_OPERAND (bound, 0));
7432 /* If optimization is turned on, the SAVE_EXPRs that describe how to
7433 access the upper bound values may be bogus. If they refer to a
7434 register, they may only describe how to get at these values at the
7435 points in the generated code right after they have just been
7436 computed. Worse yet, in the typical case, the upper bound values
7437 will not even *be* computed in the optimized code (though the
7438 number of elements will), so these SAVE_EXPRs are entirely
7439 bogus. In order to compensate for this fact, we check here to see
7440 if optimization is enabled, and if so, we don't add an attribute
7441 for the (unknown and unknowable) upper bound. This should not
7442 cause too much trouble for existing (stupid?) debuggers because
7443 they have to deal with empty upper bounds location descriptions
7444 anyway in order to be able to deal with incomplete array types.
7445 Of course an intelligent debugger (GDB?) should be able to
7446 comprehend that a missing upper bound specification in a array
7447 type used for a storage class `auto' local array variable
7448 indicates that the upper bound is both unknown (at compile- time)
7449 and unknowable (at run-time) due to optimization.
7451 We assume that a MEM rtx is safe because gcc wouldn't put the
7452 value there unless it was going to be used repeatedly in the
7453 function, i.e. for cleanups. */
7454 if (! optimize || (SAVE_EXPR_RTL (bound)
7455 && GET_CODE (SAVE_EXPR_RTL (bound)) == MEM))
7457 register dw_die_ref ctx = lookup_decl_die (current_function_decl);
7458 register dw_die_ref decl_die = new_die (DW_TAG_variable, ctx);
7459 register rtx loc = SAVE_EXPR_RTL (bound);
7461 /* If the RTL for the SAVE_EXPR is memory, handle the case where
7462 it references an outer function's frame. */
7464 if (GET_CODE (loc) == MEM)
7466 rtx new_addr = fix_lexical_addr (XEXP (loc, 0), bound);
7468 if (XEXP (loc, 0) != new_addr)
7469 loc = gen_rtx_MEM (GET_MODE (loc), new_addr);
7472 add_AT_flag (decl_die, DW_AT_artificial, 1);
7473 add_type_attribute (decl_die, TREE_TYPE (bound), 1, 0, ctx);
7474 add_AT_location_description (decl_die, DW_AT_location, loc);
7475 add_AT_die_ref (subrange_die, bound_attr, decl_die);
7478 /* Else leave out the attribute. */
7484 /* ??? These types of bounds can be created by the Ada front end,
7485 and it isn't clear how to emit debug info for them. */
7493 /* Note that the block of subscript information for an array type also
7494 includes information about the element type of type given array type. */
7497 add_subscript_info (type_die, type)
7498 register dw_die_ref type_die;
7501 #ifndef MIPS_DEBUGGING_INFO
7502 register unsigned dimension_number;
7504 register tree lower, upper;
7505 register dw_die_ref subrange_die;
7507 /* The GNU compilers represent multidimensional array types as sequences of
7508 one dimensional array types whose element types are themselves array
7509 types. Here we squish that down, so that each multidimensional array
7510 type gets only one array_type DIE in the Dwarf debugging info. The draft
7511 Dwarf specification say that we are allowed to do this kind of
7512 compression in C (because there is no difference between an array or
7513 arrays and a multidimensional array in C) but for other source languages
7514 (e.g. Ada) we probably shouldn't do this. */
7516 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
7517 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
7518 We work around this by disabling this feature. See also
7519 gen_array_type_die. */
7520 #ifndef MIPS_DEBUGGING_INFO
7521 for (dimension_number = 0;
7522 TREE_CODE (type) == ARRAY_TYPE;
7523 type = TREE_TYPE (type), dimension_number++)
7526 register tree domain = TYPE_DOMAIN (type);
7528 /* Arrays come in three flavors: Unspecified bounds, fixed bounds,
7529 and (in GNU C only) variable bounds. Handle all three forms
7531 subrange_die = new_die (DW_TAG_subrange_type, type_die);
7534 /* We have an array type with specified bounds. */
7535 lower = TYPE_MIN_VALUE (domain);
7536 upper = TYPE_MAX_VALUE (domain);
7538 /* define the index type. */
7539 if (TREE_TYPE (domain))
7541 /* ??? This is probably an Ada unnamed subrange type. Ignore the
7542 TREE_TYPE field. We can't emit debug info for this
7543 because it is an unnamed integral type. */
7544 if (TREE_CODE (domain) == INTEGER_TYPE
7545 && TYPE_NAME (domain) == NULL_TREE
7546 && TREE_CODE (TREE_TYPE (domain)) == INTEGER_TYPE
7547 && TYPE_NAME (TREE_TYPE (domain)) == NULL_TREE)
7550 add_type_attribute (subrange_die, TREE_TYPE (domain), 0, 0,
7554 /* ??? If upper is NULL, the array has unspecified length,
7555 but it does have a lower bound. This happens with Fortran
7557 Since the debugger is definitely going to need to know N
7558 to produce useful results, go ahead and output the lower
7559 bound solo, and hope the debugger can cope. */
7561 add_bound_info (subrange_die, DW_AT_lower_bound, lower);
7563 add_bound_info (subrange_die, DW_AT_upper_bound, upper);
7566 /* We have an array type with an unspecified length. The DWARF-2
7567 spec does not say how to handle this; let's just leave out the
7571 #ifndef MIPS_DEBUGGING_INFO
7577 add_byte_size_attribute (die, tree_node)
7579 register tree tree_node;
7581 register unsigned size;
7583 switch (TREE_CODE (tree_node))
7591 case QUAL_UNION_TYPE:
7592 size = int_size_in_bytes (tree_node);
7595 /* For a data member of a struct or union, the DW_AT_byte_size is
7596 generally given as the number of bytes normally allocated for an
7597 object of the *declared* type of the member itself. This is true
7598 even for bit-fields. */
7599 size = simple_type_size_in_bits (field_type (tree_node)) / BITS_PER_UNIT;
7605 /* Note that `size' might be -1 when we get to this point. If it is, that
7606 indicates that the byte size of the entity in question is variable. We
7607 have no good way of expressing this fact in Dwarf at the present time,
7608 so just let the -1 pass on through. */
7610 add_AT_unsigned (die, DW_AT_byte_size, size);
7613 /* For a FIELD_DECL node which represents a bit-field, output an attribute
7614 which specifies the distance in bits from the highest order bit of the
7615 "containing object" for the bit-field to the highest order bit of the
7618 For any given bit-field, the "containing object" is a hypothetical
7619 object (of some integral or enum type) within which the given bit-field
7620 lives. The type of this hypothetical "containing object" is always the
7621 same as the declared type of the individual bit-field itself. The
7622 determination of the exact location of the "containing object" for a
7623 bit-field is rather complicated. It's handled by the
7624 `field_byte_offset' function (above).
7626 Note that it is the size (in bytes) of the hypothetical "containing object"
7627 which will be given in the DW_AT_byte_size attribute for this bit-field.
7628 (See `byte_size_attribute' above). */
7631 add_bit_offset_attribute (die, decl)
7632 register dw_die_ref die;
7635 HOST_WIDE_INT object_offset_in_bytes = field_byte_offset (decl);
7636 tree type = DECL_BIT_FIELD_TYPE (decl);
7637 HOST_WIDE_INT bitpos_int;
7638 HOST_WIDE_INT highest_order_object_bit_offset;
7639 HOST_WIDE_INT highest_order_field_bit_offset;
7640 HOST_WIDE_INT unsigned bit_offset;
7642 /* Must be a field and a bit field. */
7644 || TREE_CODE (decl) != FIELD_DECL)
7647 /* We can't yet handle bit-fields whose offsets are variable, so if we
7648 encounter such things, just return without generating any attribute
7649 whatsoever. Likewise for variable or too large size. */
7650 if (! host_integerp (bit_position (decl), 0)
7651 || ! host_integerp (DECL_SIZE (decl), 1))
7654 bitpos_int = int_bit_position (decl);
7656 /* Note that the bit offset is always the distance (in bits) from the
7657 highest-order bit of the "containing object" to the highest-order bit of
7658 the bit-field itself. Since the "high-order end" of any object or field
7659 is different on big-endian and little-endian machines, the computation
7660 below must take account of these differences. */
7661 highest_order_object_bit_offset = object_offset_in_bytes * BITS_PER_UNIT;
7662 highest_order_field_bit_offset = bitpos_int;
7664 if (! BYTES_BIG_ENDIAN)
7666 highest_order_field_bit_offset += tree_low_cst (DECL_SIZE (decl), 0);
7667 highest_order_object_bit_offset += simple_type_size_in_bits (type);
7671 = (! BYTES_BIG_ENDIAN
7672 ? highest_order_object_bit_offset - highest_order_field_bit_offset
7673 : highest_order_field_bit_offset - highest_order_object_bit_offset);
7675 add_AT_unsigned (die, DW_AT_bit_offset, bit_offset);
7678 /* For a FIELD_DECL node which represents a bit field, output an attribute
7679 which specifies the length in bits of the given field. */
7682 add_bit_size_attribute (die, decl)
7683 register dw_die_ref die;
7686 /* Must be a field and a bit field. */
7687 if (TREE_CODE (decl) != FIELD_DECL
7688 || ! DECL_BIT_FIELD_TYPE (decl))
7691 if (host_integerp (DECL_SIZE (decl), 1))
7692 add_AT_unsigned (die, DW_AT_bit_size, tree_low_cst (DECL_SIZE (decl), 1));
7695 /* If the compiled language is ANSI C, then add a 'prototyped'
7696 attribute, if arg types are given for the parameters of a function. */
7699 add_prototyped_attribute (die, func_type)
7700 register dw_die_ref die;
7701 register tree func_type;
7703 if (get_AT_unsigned (comp_unit_die, DW_AT_language) == DW_LANG_C89
7704 && TYPE_ARG_TYPES (func_type) != NULL)
7705 add_AT_flag (die, DW_AT_prototyped, 1);
7708 /* Add an 'abstract_origin' attribute below a given DIE. The DIE is found
7709 by looking in either the type declaration or object declaration
7713 add_abstract_origin_attribute (die, origin)
7714 register dw_die_ref die;
7715 register tree origin;
7717 dw_die_ref origin_die = NULL;
7719 if (TREE_CODE (origin) != FUNCTION_DECL)
7721 /* We may have gotten separated from the block for the inlined
7722 function, if we're in an exception handler or some such; make
7723 sure that the abstract function has been written out.
7725 Doing this for nested functions is wrong, however; functions are
7726 distinct units, and our context might not even be inline. */
7729 fn = TYPE_STUB_DECL (fn);
7730 fn = decl_function_context (fn);
7732 gen_abstract_function (fn);
7735 if (DECL_P (origin))
7736 origin_die = lookup_decl_die (origin);
7737 else if (TYPE_P (origin))
7738 origin_die = lookup_type_die (origin);
7740 if (origin_die == NULL)
7743 add_AT_die_ref (die, DW_AT_abstract_origin, origin_die);
7746 /* We do not currently support the pure_virtual attribute. */
7749 add_pure_or_virtual_attribute (die, func_decl)
7750 register dw_die_ref die;
7751 register tree func_decl;
7753 if (DECL_VINDEX (func_decl))
7755 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
7757 if (host_integerp (DECL_VINDEX (func_decl), 0))
7758 add_AT_loc (die, DW_AT_vtable_elem_location,
7759 new_loc_descr (DW_OP_constu,
7760 tree_low_cst (DECL_VINDEX (func_decl), 0),
7763 /* GNU extension: Record what type this method came from originally. */
7764 if (debug_info_level > DINFO_LEVEL_TERSE)
7765 add_AT_die_ref (die, DW_AT_containing_type,
7766 lookup_type_die (DECL_CONTEXT (func_decl)));
7770 /* Add source coordinate attributes for the given decl. */
7773 add_src_coords_attributes (die, decl)
7774 register dw_die_ref die;
7777 register unsigned file_index = lookup_filename (DECL_SOURCE_FILE (decl));
7779 add_AT_unsigned (die, DW_AT_decl_file, file_index);
7780 add_AT_unsigned (die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
7783 /* Add an DW_AT_name attribute and source coordinate attribute for the
7784 given decl, but only if it actually has a name. */
7787 add_name_and_src_coords_attributes (die, decl)
7788 register dw_die_ref die;
7791 register tree decl_name;
7793 decl_name = DECL_NAME (decl);
7794 if (decl_name != NULL && IDENTIFIER_POINTER (decl_name) != NULL)
7796 add_name_attribute (die, dwarf2_name (decl, 0));
7797 if (! DECL_ARTIFICIAL (decl))
7798 add_src_coords_attributes (die, decl);
7800 if ((TREE_CODE (decl) == FUNCTION_DECL || TREE_CODE (decl) == VAR_DECL)
7801 && TREE_PUBLIC (decl)
7802 && DECL_ASSEMBLER_NAME (decl) != DECL_NAME (decl))
7803 add_AT_string (die, DW_AT_MIPS_linkage_name,
7804 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
7808 /* Push a new declaration scope. */
7811 push_decl_scope (scope)
7814 /* Make room in the decl_scope_table, if necessary. */
7815 if (decl_scope_table_allocated == decl_scope_depth)
7817 decl_scope_table_allocated += DECL_SCOPE_TABLE_INCREMENT;
7819 = (tree *) xrealloc (decl_scope_table,
7820 decl_scope_table_allocated * sizeof (tree));
7823 decl_scope_table[decl_scope_depth] = scope;
7827 /* Pop a declaration scope. */
7831 if (decl_scope_depth <= 0)
7836 /* Return the DIE for the scope that immediately contains this type.
7837 Non-named types get global scope. Named types nested in other
7838 types get their containing scope if it's open, or global scope
7839 otherwise. All other types (i.e. function-local named types) get
7840 the current active scope. */
7843 scope_die_for (t, context_die)
7845 register dw_die_ref context_die;
7847 register dw_die_ref scope_die = NULL;
7848 register tree containing_scope;
7851 /* Non-types always go in the current scope. */
7855 containing_scope = TYPE_CONTEXT (t);
7857 /* Ignore namespaces for the moment. */
7858 if (containing_scope && TREE_CODE (containing_scope) == NAMESPACE_DECL)
7859 containing_scope = NULL_TREE;
7861 /* Ignore function type "scopes" from the C frontend. They mean that
7862 a tagged type is local to a parmlist of a function declarator, but
7863 that isn't useful to DWARF. */
7864 if (containing_scope && TREE_CODE (containing_scope) == FUNCTION_TYPE)
7865 containing_scope = NULL_TREE;
7867 if (containing_scope == NULL_TREE)
7868 scope_die = comp_unit_die;
7869 else if (TYPE_P (containing_scope))
7871 /* For types, we can just look up the appropriate DIE. But
7872 first we check to see if we're in the middle of emitting it
7873 so we know where the new DIE should go. */
7875 for (i = decl_scope_depth - 1; i >= 0; --i)
7876 if (decl_scope_table[i] == containing_scope)
7881 if (debug_info_level > DINFO_LEVEL_TERSE
7882 && !TREE_ASM_WRITTEN (containing_scope))
7885 /* If none of the current dies are suitable, we get file scope. */
7886 scope_die = comp_unit_die;
7889 scope_die = lookup_type_die (containing_scope);
7892 scope_die = context_die;
7897 /* Returns nonzero iff CONTEXT_DIE is internal to a function. */
7899 static inline int local_scope_p PARAMS ((dw_die_ref));
7901 local_scope_p (context_die)
7902 dw_die_ref context_die;
7904 for (; context_die; context_die = context_die->die_parent)
7905 if (context_die->die_tag == DW_TAG_inlined_subroutine
7906 || context_die->die_tag == DW_TAG_subprogram)
7911 /* Returns nonzero iff CONTEXT_DIE is a class. */
7913 static inline int class_scope_p PARAMS ((dw_die_ref));
7915 class_scope_p (context_die)
7916 dw_die_ref context_die;
7919 && (context_die->die_tag == DW_TAG_structure_type
7920 || context_die->die_tag == DW_TAG_union_type));
7923 /* Many forms of DIEs require a "type description" attribute. This
7924 routine locates the proper "type descriptor" die for the type given
7925 by 'type', and adds an DW_AT_type attribute below the given die. */
7928 add_type_attribute (object_die, type, decl_const, decl_volatile, context_die)
7929 register dw_die_ref object_die;
7931 register int decl_const;
7932 register int decl_volatile;
7933 register dw_die_ref context_die;
7935 register enum tree_code code = TREE_CODE (type);
7936 register dw_die_ref type_die = NULL;
7938 /* ??? If this type is an unnamed subrange type of an integral or
7939 floating-point type, use the inner type. This is because we have no
7940 support for unnamed types in base_type_die. This can happen if this is
7941 an Ada subrange type. Correct solution is emit a subrange type die. */
7942 if ((code == INTEGER_TYPE || code == REAL_TYPE)
7943 && TREE_TYPE (type) != 0 && TYPE_NAME (type) == 0)
7944 type = TREE_TYPE (type), code = TREE_CODE (type);
7946 if (code == ERROR_MARK)
7949 /* Handle a special case. For functions whose return type is void, we
7950 generate *no* type attribute. (Note that no object may have type
7951 `void', so this only applies to function return types). */
7952 if (code == VOID_TYPE)
7955 type_die = modified_type_die (type,
7956 decl_const || TYPE_READONLY (type),
7957 decl_volatile || TYPE_VOLATILE (type),
7959 if (type_die != NULL)
7960 add_AT_die_ref (object_die, DW_AT_type, type_die);
7963 /* Given a tree pointer to a struct, class, union, or enum type node, return
7964 a pointer to the (string) tag name for the given type, or zero if the type
7965 was declared without a tag. */
7971 register const char *name = 0;
7973 if (TYPE_NAME (type) != 0)
7975 register tree t = 0;
7977 /* Find the IDENTIFIER_NODE for the type name. */
7978 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
7979 t = TYPE_NAME (type);
7981 /* The g++ front end makes the TYPE_NAME of *each* tagged type point to
7982 a TYPE_DECL node, regardless of whether or not a `typedef' was
7984 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7985 && ! DECL_IGNORED_P (TYPE_NAME (type)))
7986 t = DECL_NAME (TYPE_NAME (type));
7988 /* Now get the name as a string, or invent one. */
7990 name = IDENTIFIER_POINTER (t);
7993 return (name == 0 || *name == '\0') ? 0 : name;
7996 /* Return the type associated with a data member, make a special check
7997 for bit field types. */
8000 member_declared_type (member)
8001 register tree member;
8003 return (DECL_BIT_FIELD_TYPE (member)
8004 ? DECL_BIT_FIELD_TYPE (member)
8005 : TREE_TYPE (member));
8008 /* Get the decl's label, as described by its RTL. This may be different
8009 from the DECL_NAME name used in the source file. */
8013 decl_start_label (decl)
8018 x = DECL_RTL (decl);
8019 if (GET_CODE (x) != MEM)
8023 if (GET_CODE (x) != SYMBOL_REF)
8026 fnname = XSTR (x, 0);
8031 /* These routines generate the internal representation of the DIE's for
8032 the compilation unit. Debugging information is collected by walking
8033 the declaration trees passed in from dwarf2out_decl(). */
8036 gen_array_type_die (type, context_die)
8038 register dw_die_ref context_die;
8040 register dw_die_ref scope_die = scope_die_for (type, context_die);
8041 register dw_die_ref array_die;
8042 register tree element_type;
8044 /* ??? The SGI dwarf reader fails for array of array of enum types unless
8045 the inner array type comes before the outer array type. Thus we must
8046 call gen_type_die before we call new_die. See below also. */
8047 #ifdef MIPS_DEBUGGING_INFO
8048 gen_type_die (TREE_TYPE (type), context_die);
8051 array_die = new_die (DW_TAG_array_type, scope_die);
8054 /* We default the array ordering. SDB will probably do
8055 the right things even if DW_AT_ordering is not present. It's not even
8056 an issue until we start to get into multidimensional arrays anyway. If
8057 SDB is ever caught doing the Wrong Thing for multi-dimensional arrays,
8058 then we'll have to put the DW_AT_ordering attribute back in. (But if
8059 and when we find out that we need to put these in, we will only do so
8060 for multidimensional arrays. */
8061 add_AT_unsigned (array_die, DW_AT_ordering, DW_ORD_row_major);
8064 #ifdef MIPS_DEBUGGING_INFO
8065 /* The SGI compilers handle arrays of unknown bound by setting
8066 AT_declaration and not emitting any subrange DIEs. */
8067 if (! TYPE_DOMAIN (type))
8068 add_AT_unsigned (array_die, DW_AT_declaration, 1);
8071 add_subscript_info (array_die, type);
8073 add_name_attribute (array_die, type_tag (type));
8074 equate_type_number_to_die (type, array_die);
8076 /* Add representation of the type of the elements of this array type. */
8077 element_type = TREE_TYPE (type);
8079 /* ??? The SGI dwarf reader fails for multidimensional arrays with a
8080 const enum type. E.g. const enum machine_mode insn_operand_mode[2][10].
8081 We work around this by disabling this feature. See also
8082 add_subscript_info. */
8083 #ifndef MIPS_DEBUGGING_INFO
8084 while (TREE_CODE (element_type) == ARRAY_TYPE)
8085 element_type = TREE_TYPE (element_type);
8087 gen_type_die (element_type, context_die);
8090 add_type_attribute (array_die, element_type, 0, 0, context_die);
8094 gen_set_type_die (type, context_die)
8096 register dw_die_ref context_die;
8098 register dw_die_ref type_die
8099 = new_die (DW_TAG_set_type, scope_die_for (type, context_die));
8101 equate_type_number_to_die (type, type_die);
8102 add_type_attribute (type_die, TREE_TYPE (type), 0, 0, context_die);
8107 gen_entry_point_die (decl, context_die)
8109 register dw_die_ref context_die;
8111 register tree origin = decl_ultimate_origin (decl);
8112 register dw_die_ref decl_die = new_die (DW_TAG_entry_point, context_die);
8114 add_abstract_origin_attribute (decl_die, origin);
8117 add_name_and_src_coords_attributes (decl_die, decl);
8118 add_type_attribute (decl_die, TREE_TYPE (TREE_TYPE (decl)),
8122 if (DECL_ABSTRACT (decl))
8123 equate_decl_number_to_die (decl, decl_die);
8125 add_AT_lbl_id (decl_die, DW_AT_low_pc, decl_start_label (decl));
8129 /* Remember a type in the incomplete_types_list. */
8132 add_incomplete_type (type)
8135 if (incomplete_types == incomplete_types_allocated)
8137 incomplete_types_allocated += INCOMPLETE_TYPES_INCREMENT;
8138 incomplete_types_list
8139 = (tree *) xrealloc (incomplete_types_list,
8140 sizeof (tree) * incomplete_types_allocated);
8143 incomplete_types_list[incomplete_types++] = type;
8146 /* Walk through the list of incomplete types again, trying once more to
8147 emit full debugging info for them. */
8150 retry_incomplete_types ()
8154 while (incomplete_types)
8157 type = incomplete_types_list[incomplete_types];
8158 gen_type_die (type, comp_unit_die);
8162 /* Generate a DIE to represent an inlined instance of an enumeration type. */
8165 gen_inlined_enumeration_type_die (type, context_die)
8167 register dw_die_ref context_die;
8169 register dw_die_ref type_die = new_die (DW_TAG_enumeration_type,
8171 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8172 be incomplete and such types are not marked. */
8173 add_abstract_origin_attribute (type_die, type);
8176 /* Generate a DIE to represent an inlined instance of a structure type. */
8179 gen_inlined_structure_type_die (type, context_die)
8181 register dw_die_ref context_die;
8183 register dw_die_ref type_die = new_die (DW_TAG_structure_type, context_die);
8185 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8186 be incomplete and such types are not marked. */
8187 add_abstract_origin_attribute (type_die, type);
8190 /* Generate a DIE to represent an inlined instance of a union type. */
8193 gen_inlined_union_type_die (type, context_die)
8195 register dw_die_ref context_die;
8197 register dw_die_ref type_die = new_die (DW_TAG_union_type, context_die);
8199 /* We do not check for TREE_ASM_WRITTEN (type) being set, as the type may
8200 be incomplete and such types are not marked. */
8201 add_abstract_origin_attribute (type_die, type);
8204 /* Generate a DIE to represent an enumeration type. Note that these DIEs
8205 include all of the information about the enumeration values also. Each
8206 enumerated type name/value is listed as a child of the enumerated type
8210 gen_enumeration_type_die (type, context_die)
8212 register dw_die_ref context_die;
8214 register dw_die_ref type_die = lookup_type_die (type);
8216 if (type_die == NULL)
8218 type_die = new_die (DW_TAG_enumeration_type,
8219 scope_die_for (type, context_die));
8220 equate_type_number_to_die (type, type_die);
8221 add_name_attribute (type_die, type_tag (type));
8223 else if (! TYPE_SIZE (type))
8226 remove_AT (type_die, DW_AT_declaration);
8228 /* Handle a GNU C/C++ extension, i.e. incomplete enum types. If the
8229 given enum type is incomplete, do not generate the DW_AT_byte_size
8230 attribute or the DW_AT_element_list attribute. */
8231 if (TYPE_SIZE (type))
8235 TREE_ASM_WRITTEN (type) = 1;
8236 add_byte_size_attribute (type_die, type);
8237 if (TYPE_STUB_DECL (type) != NULL_TREE)
8238 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
8240 /* If the first reference to this type was as the return type of an
8241 inline function, then it may not have a parent. Fix this now. */
8242 if (type_die->die_parent == NULL)
8243 add_child_die (scope_die_for (type, context_die), type_die);
8245 for (link = TYPE_FIELDS (type);
8246 link != NULL; link = TREE_CHAIN (link))
8248 register dw_die_ref enum_die = new_die (DW_TAG_enumerator, type_die);
8250 add_name_attribute (enum_die,
8251 IDENTIFIER_POINTER (TREE_PURPOSE (link)));
8253 if (host_integerp (TREE_VALUE (link), 0))
8255 if (tree_int_cst_sgn (TREE_VALUE (link)) < 0)
8256 add_AT_int (enum_die, DW_AT_const_value,
8257 tree_low_cst (TREE_VALUE (link), 0));
8259 add_AT_unsigned (enum_die, DW_AT_const_value,
8260 tree_low_cst (TREE_VALUE (link), 0));
8265 add_AT_flag (type_die, DW_AT_declaration, 1);
8268 /* Generate a DIE to represent either a real live formal parameter decl or to
8269 represent just the type of some formal parameter position in some function
8272 Note that this routine is a bit unusual because its argument may be a
8273 ..._DECL node (i.e. either a PARM_DECL or perhaps a VAR_DECL which
8274 represents an inlining of some PARM_DECL) or else some sort of a ..._TYPE
8275 node. If it's the former then this function is being called to output a
8276 DIE to represent a formal parameter object (or some inlining thereof). If
8277 it's the latter, then this function is only being called to output a
8278 DW_TAG_formal_parameter DIE to stand as a placeholder for some formal
8279 argument type of some subprogram type. */
8282 gen_formal_parameter_die (node, context_die)
8284 register dw_die_ref context_die;
8286 register dw_die_ref parm_die
8287 = new_die (DW_TAG_formal_parameter, context_die);
8288 register tree origin;
8290 switch (TREE_CODE_CLASS (TREE_CODE (node)))
8293 origin = decl_ultimate_origin (node);
8295 add_abstract_origin_attribute (parm_die, origin);
8298 add_name_and_src_coords_attributes (parm_die, node);
8299 add_type_attribute (parm_die, TREE_TYPE (node),
8300 TREE_READONLY (node),
8301 TREE_THIS_VOLATILE (node),
8303 if (DECL_ARTIFICIAL (node))
8304 add_AT_flag (parm_die, DW_AT_artificial, 1);
8307 equate_decl_number_to_die (node, parm_die);
8308 if (! DECL_ABSTRACT (node))
8309 add_location_or_const_value_attribute (parm_die, node);
8314 /* We were called with some kind of a ..._TYPE node. */
8315 add_type_attribute (parm_die, node, 0, 0, context_die);
8325 /* Generate a special type of DIE used as a stand-in for a trailing ellipsis
8326 at the end of an (ANSI prototyped) formal parameters list. */
8329 gen_unspecified_parameters_die (decl_or_type, context_die)
8330 register tree decl_or_type ATTRIBUTE_UNUSED;
8331 register dw_die_ref context_die;
8333 new_die (DW_TAG_unspecified_parameters, context_die);
8336 /* Generate a list of nameless DW_TAG_formal_parameter DIEs (and perhaps a
8337 DW_TAG_unspecified_parameters DIE) to represent the types of the formal
8338 parameters as specified in some function type specification (except for
8339 those which appear as part of a function *definition*). */
8342 gen_formal_types_die (function_or_method_type, context_die)
8343 register tree function_or_method_type;
8344 register dw_die_ref context_die;
8347 register tree formal_type = NULL;
8348 register tree first_parm_type = TYPE_ARG_TYPES (function_or_method_type);
8351 /* In the case where we are generating a formal types list for a C++
8352 non-static member function type, skip over the first thing on the
8353 TYPE_ARG_TYPES list because it only represents the type of the hidden
8354 `this pointer'. The debugger should be able to figure out (without
8355 being explicitly told) that this non-static member function type takes a
8356 `this pointer' and should be able to figure what the type of that hidden
8357 parameter is from the DW_AT_member attribute of the parent
8358 DW_TAG_subroutine_type DIE. */
8359 if (TREE_CODE (function_or_method_type) == METHOD_TYPE)
8360 first_parm_type = TREE_CHAIN (first_parm_type);
8363 /* Make our first pass over the list of formal parameter types and output a
8364 DW_TAG_formal_parameter DIE for each one. */
8365 for (link = first_parm_type; link; link = TREE_CHAIN (link))
8367 register dw_die_ref parm_die;
8369 formal_type = TREE_VALUE (link);
8370 if (formal_type == void_type_node)
8373 /* Output a (nameless) DIE to represent the formal parameter itself. */
8374 parm_die = gen_formal_parameter_die (formal_type, context_die);
8375 if (TREE_CODE (function_or_method_type) == METHOD_TYPE
8376 && link == first_parm_type)
8377 add_AT_flag (parm_die, DW_AT_artificial, 1);
8380 /* If this function type has an ellipsis, add a
8381 DW_TAG_unspecified_parameters DIE to the end of the parameter list. */
8382 if (formal_type != void_type_node)
8383 gen_unspecified_parameters_die (function_or_method_type, context_die);
8385 /* Make our second (and final) pass over the list of formal parameter types
8386 and output DIEs to represent those types (as necessary). */
8387 for (link = TYPE_ARG_TYPES (function_or_method_type);
8389 link = TREE_CHAIN (link))
8391 formal_type = TREE_VALUE (link);
8392 if (formal_type == void_type_node)
8395 gen_type_die (formal_type, context_die);
8399 /* We want to generate the DIE for TYPE so that we can generate the
8400 die for MEMBER, which has been defined; we will need to refer back
8401 to the member declaration nested within TYPE. If we're trying to
8402 generate minimal debug info for TYPE, processing TYPE won't do the
8403 trick; we need to attach the member declaration by hand. */
8406 gen_type_die_for_member (type, member, context_die)
8408 dw_die_ref context_die;
8410 gen_type_die (type, context_die);
8412 /* If we're trying to avoid duplicate debug info, we may not have
8413 emitted the member decl for this function. Emit it now. */
8414 if (TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))
8415 && ! lookup_decl_die (member))
8417 if (decl_ultimate_origin (member))
8420 push_decl_scope (type);
8421 if (TREE_CODE (member) == FUNCTION_DECL)
8422 gen_subprogram_die (member, lookup_type_die (type));
8424 gen_variable_die (member, lookup_type_die (type));
8429 /* Generate the DWARF2 info for the "abstract" instance
8430 of a function which we may later generate inlined and/or
8431 out-of-line instances of. */
8434 gen_abstract_function (decl)
8437 register dw_die_ref old_die = lookup_decl_die (decl);
8440 if (old_die && get_AT_unsigned (old_die, DW_AT_inline))
8441 /* We've already generated the abstract instance. */
8444 save_fn = current_function_decl;
8445 current_function_decl = decl;
8447 set_decl_abstract_flags (decl, 1);
8448 dwarf2out_decl (decl);
8449 set_decl_abstract_flags (decl, 0);
8451 current_function_decl = save_fn;
8454 /* Generate a DIE to represent a declared function (either file-scope or
8458 gen_subprogram_die (decl, context_die)
8460 register dw_die_ref context_die;
8462 char label_id[MAX_ARTIFICIAL_LABEL_BYTES];
8463 register tree origin = decl_ultimate_origin (decl);
8464 register dw_die_ref subr_die;
8465 register rtx fp_reg;
8466 register tree fn_arg_types;
8467 register tree outer_scope;
8468 register dw_die_ref old_die = lookup_decl_die (decl);
8469 register int declaration = (current_function_decl != decl
8470 || class_scope_p (context_die));
8472 /* Note that it is possible to have both DECL_ABSTRACT and `declaration'
8473 be true, if we started to generate the abstract instance of an inline,
8474 decided to output its containing class, and proceeded to emit the
8475 declaration of the inline from the member list for the class. In that
8476 case, `declaration' takes priority; we'll get back to the abstract
8477 instance when we're done with the class. */
8479 /* The class-scope declaration DIE must be the primary DIE. */
8480 if (origin && declaration && class_scope_p (context_die))
8489 if (declaration && ! local_scope_p (context_die))
8492 /* Fixup die_parent for the abstract instance of a nested
8494 if (old_die && old_die->die_parent == NULL)
8495 add_child_die (context_die, old_die);
8497 subr_die = new_die (DW_TAG_subprogram, context_die);
8498 add_abstract_origin_attribute (subr_die, origin);
8500 else if (old_die && DECL_ABSTRACT (decl)
8501 && get_AT_unsigned (old_die, DW_AT_inline))
8503 /* This must be a redefinition of an extern inline function.
8504 We can just reuse the old die here. */
8507 /* Clear out the inlined attribute and parm types. */
8508 remove_AT (subr_die, DW_AT_inline);
8509 remove_children (subr_die);
8513 register unsigned file_index
8514 = lookup_filename (DECL_SOURCE_FILE (decl));
8516 if (get_AT_flag (old_die, DW_AT_declaration) != 1)
8518 /* ??? This can happen if there is a bug in the program, for
8519 instance, if it has duplicate function definitions. Ideally,
8520 we should detect this case and ignore it. For now, if we have
8521 already reported an error, any error at all, then assume that
8522 we got here because of a input error, not a dwarf2 bug. */
8528 /* If the definition comes from the same place as the declaration,
8529 maybe use the old DIE. We always want the DIE for this function
8530 that has the *_pc attributes to be under comp_unit_die so the
8531 debugger can find it. For inlines, that is the concrete instance,
8532 so we can use the old DIE here. For non-inline methods, we want a
8533 specification DIE at toplevel, so we need a new DIE. For local
8534 class methods, this doesn't apply; we just use the old DIE. */
8535 if ((DECL_ABSTRACT (decl) || old_die->die_parent == comp_unit_die
8536 || context_die == NULL)
8537 && (DECL_ARTIFICIAL (decl)
8538 || (get_AT_unsigned (old_die, DW_AT_decl_file) == file_index
8539 && (get_AT_unsigned (old_die, DW_AT_decl_line)
8540 == (unsigned) DECL_SOURCE_LINE (decl)))))
8544 /* Clear out the declaration attribute and the parm types. */
8545 remove_AT (subr_die, DW_AT_declaration);
8546 remove_children (subr_die);
8550 subr_die = new_die (DW_TAG_subprogram, context_die);
8551 add_AT_die_ref (subr_die, DW_AT_specification, old_die);
8552 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8553 add_AT_unsigned (subr_die, DW_AT_decl_file, file_index);
8554 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8555 != (unsigned) DECL_SOURCE_LINE (decl))
8557 (subr_die, DW_AT_decl_line, DECL_SOURCE_LINE (decl));
8562 subr_die = new_die (DW_TAG_subprogram, context_die);
8564 if (TREE_PUBLIC (decl))
8565 add_AT_flag (subr_die, DW_AT_external, 1);
8567 add_name_and_src_coords_attributes (subr_die, decl);
8568 if (debug_info_level > DINFO_LEVEL_TERSE)
8570 register tree type = TREE_TYPE (decl);
8572 add_prototyped_attribute (subr_die, type);
8573 add_type_attribute (subr_die, TREE_TYPE (type), 0, 0, context_die);
8576 add_pure_or_virtual_attribute (subr_die, decl);
8577 if (DECL_ARTIFICIAL (decl))
8578 add_AT_flag (subr_die, DW_AT_artificial, 1);
8579 if (TREE_PROTECTED (decl))
8580 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_protected);
8581 else if (TREE_PRIVATE (decl))
8582 add_AT_unsigned (subr_die, DW_AT_accessibility, DW_ACCESS_private);
8588 add_AT_flag (subr_die, DW_AT_declaration, 1);
8590 /* The first time we see a member function, it is in the context of
8591 the class to which it belongs. We make sure of this by emitting
8592 the class first. The next time is the definition, which is
8593 handled above. The two may come from the same source text. */
8594 if (DECL_CONTEXT (decl) || DECL_ABSTRACT (decl))
8595 equate_decl_number_to_die (decl, subr_die);
8597 else if (DECL_ABSTRACT (decl))
8599 if (DECL_INLINE (decl) && !flag_no_inline)
8601 /* ??? Checking DECL_DEFER_OUTPUT is correct for static
8602 inline functions, but not for extern inline functions.
8603 We can't get this completely correct because information
8604 about whether the function was declared inline is not
8606 if (DECL_DEFER_OUTPUT (decl))
8607 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_inlined);
8609 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_inlined);
8612 add_AT_unsigned (subr_die, DW_AT_inline, DW_INL_declared_not_inlined);
8614 equate_decl_number_to_die (decl, subr_die);
8616 else if (!DECL_EXTERNAL (decl))
8618 if (origin == NULL_TREE)
8619 equate_decl_number_to_die (decl, subr_die);
8621 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_BEGIN_LABEL,
8622 current_funcdef_number);
8623 add_AT_lbl_id (subr_die, DW_AT_low_pc, label_id);
8624 ASM_GENERATE_INTERNAL_LABEL (label_id, FUNC_END_LABEL,
8625 current_funcdef_number);
8626 add_AT_lbl_id (subr_die, DW_AT_high_pc, label_id);
8628 add_pubname (decl, subr_die);
8629 add_arange (decl, subr_die);
8631 #ifdef MIPS_DEBUGGING_INFO
8632 /* Add a reference to the FDE for this routine. */
8633 add_AT_fde_ref (subr_die, DW_AT_MIPS_fde, current_funcdef_fde);
8636 /* Define the "frame base" location for this routine. We use the
8637 frame pointer or stack pointer registers, since the RTL for local
8638 variables is relative to one of them. */
8640 = frame_pointer_needed ? hard_frame_pointer_rtx : stack_pointer_rtx;
8641 add_AT_loc (subr_die, DW_AT_frame_base, reg_loc_descriptor (fp_reg));
8644 /* ??? This fails for nested inline functions, because context_display
8645 is not part of the state saved/restored for inline functions. */
8646 if (current_function_needs_context)
8647 add_AT_location_description (subr_die, DW_AT_static_link,
8648 lookup_static_chain (decl));
8652 /* Now output descriptions of the arguments for this function. This gets
8653 (unnecessarily?) complex because of the fact that the DECL_ARGUMENT list
8654 for a FUNCTION_DECL doesn't indicate cases where there was a trailing
8655 `...' at the end of the formal parameter list. In order to find out if
8656 there was a trailing ellipsis or not, we must instead look at the type
8657 associated with the FUNCTION_DECL. This will be a node of type
8658 FUNCTION_TYPE. If the chain of type nodes hanging off of this
8659 FUNCTION_TYPE node ends with a void_type_node then there should *not* be
8660 an ellipsis at the end. */
8662 /* In the case where we are describing a mere function declaration, all we
8663 need to do here (and all we *can* do here) is to describe the *types* of
8664 its formal parameters. */
8665 if (debug_info_level <= DINFO_LEVEL_TERSE)
8667 else if (declaration)
8668 gen_formal_types_die (TREE_TYPE (decl), subr_die);
8671 /* Generate DIEs to represent all known formal parameters */
8672 register tree arg_decls = DECL_ARGUMENTS (decl);
8675 /* When generating DIEs, generate the unspecified_parameters DIE
8676 instead if we come across the arg "__builtin_va_alist" */
8677 for (parm = arg_decls; parm; parm = TREE_CHAIN (parm))
8678 if (TREE_CODE (parm) == PARM_DECL)
8680 if (DECL_NAME (parm)
8681 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (parm)),
8682 "__builtin_va_alist"))
8683 gen_unspecified_parameters_die (parm, subr_die);
8685 gen_decl_die (parm, subr_die);
8688 /* Decide whether we need a unspecified_parameters DIE at the end.
8689 There are 2 more cases to do this for: 1) the ansi ... declaration -
8690 this is detectable when the end of the arg list is not a
8691 void_type_node 2) an unprototyped function declaration (not a
8692 definition). This just means that we have no info about the
8693 parameters at all. */
8694 fn_arg_types = TYPE_ARG_TYPES (TREE_TYPE (decl));
8695 if (fn_arg_types != NULL)
8697 /* this is the prototyped case, check for ... */
8698 if (TREE_VALUE (tree_last (fn_arg_types)) != void_type_node)
8699 gen_unspecified_parameters_die (decl, subr_die);
8701 else if (DECL_INITIAL (decl) == NULL_TREE)
8702 gen_unspecified_parameters_die (decl, subr_die);
8705 /* Output Dwarf info for all of the stuff within the body of the function
8706 (if it has one - it may be just a declaration). */
8707 outer_scope = DECL_INITIAL (decl);
8709 /* Note that here, `outer_scope' is a pointer to the outermost BLOCK
8710 node created to represent a function. This outermost BLOCK actually
8711 represents the outermost binding contour for the function, i.e. the
8712 contour in which the function's formal parameters and labels get
8713 declared. Curiously, it appears that the front end doesn't actually
8714 put the PARM_DECL nodes for the current function onto the BLOCK_VARS
8715 list for this outer scope. (They are strung off of the DECL_ARGUMENTS
8716 list for the function instead.) The BLOCK_VARS list for the
8717 `outer_scope' does provide us with a list of the LABEL_DECL nodes for
8718 the function however, and we output DWARF info for those in
8719 decls_for_scope. Just within the `outer_scope' there will be a BLOCK
8720 node representing the function's outermost pair of curly braces, and
8721 any blocks used for the base and member initializers of a C++
8722 constructor function. */
8723 if (! declaration && TREE_CODE (outer_scope) != ERROR_MARK)
8725 current_function_has_inlines = 0;
8726 decls_for_scope (outer_scope, subr_die, 0);
8728 #if 0 && defined (MIPS_DEBUGGING_INFO)
8729 if (current_function_has_inlines)
8731 add_AT_flag (subr_die, DW_AT_MIPS_has_inlines, 1);
8732 if (! comp_unit_has_inlines)
8734 add_AT_flag (comp_unit_die, DW_AT_MIPS_has_inlines, 1);
8735 comp_unit_has_inlines = 1;
8742 /* Generate a DIE to represent a declared data object. */
8745 gen_variable_die (decl, context_die)
8747 register dw_die_ref context_die;
8749 register tree origin = decl_ultimate_origin (decl);
8750 register dw_die_ref var_die = new_die (DW_TAG_variable, context_die);
8752 dw_die_ref old_die = lookup_decl_die (decl);
8753 int declaration = (DECL_EXTERNAL (decl)
8754 || class_scope_p (context_die));
8757 add_abstract_origin_attribute (var_die, origin);
8758 /* Loop unrolling can create multiple blocks that refer to the same
8759 static variable, so we must test for the DW_AT_declaration flag. */
8760 /* ??? Loop unrolling/reorder_blocks should perhaps be rewritten to
8761 copy decls and set the DECL_ABSTRACT flag on them instead of
8763 else if (old_die && TREE_STATIC (decl)
8764 && get_AT_flag (old_die, DW_AT_declaration) == 1)
8766 /* This is a definition of a C++ class level static. */
8767 add_AT_die_ref (var_die, DW_AT_specification, old_die);
8768 if (DECL_NAME (decl))
8770 register unsigned file_index
8771 = lookup_filename (DECL_SOURCE_FILE (decl));
8773 if (get_AT_unsigned (old_die, DW_AT_decl_file) != file_index)
8774 add_AT_unsigned (var_die, DW_AT_decl_file, file_index);
8776 if (get_AT_unsigned (old_die, DW_AT_decl_line)
8777 != (unsigned) DECL_SOURCE_LINE (decl))
8779 add_AT_unsigned (var_die, DW_AT_decl_line,
8780 DECL_SOURCE_LINE (decl));
8785 add_name_and_src_coords_attributes (var_die, decl);
8786 add_type_attribute (var_die, TREE_TYPE (decl),
8787 TREE_READONLY (decl),
8788 TREE_THIS_VOLATILE (decl), context_die);
8790 if (TREE_PUBLIC (decl))
8791 add_AT_flag (var_die, DW_AT_external, 1);
8793 if (DECL_ARTIFICIAL (decl))
8794 add_AT_flag (var_die, DW_AT_artificial, 1);
8796 if (TREE_PROTECTED (decl))
8797 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_protected);
8799 else if (TREE_PRIVATE (decl))
8800 add_AT_unsigned (var_die, DW_AT_accessibility, DW_ACCESS_private);
8804 add_AT_flag (var_die, DW_AT_declaration, 1);
8806 if (class_scope_p (context_die) || DECL_ABSTRACT (decl))
8807 equate_decl_number_to_die (decl, var_die);
8809 if (! declaration && ! DECL_ABSTRACT (decl))
8811 add_location_or_const_value_attribute (var_die, decl);
8812 add_pubname (decl, var_die);
8816 /* Generate a DIE to represent a label identifier. */
8819 gen_label_die (decl, context_die)
8821 register dw_die_ref context_die;
8823 register tree origin = decl_ultimate_origin (decl);
8824 register dw_die_ref lbl_die = new_die (DW_TAG_label, context_die);
8826 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8827 char label2[MAX_ARTIFICIAL_LABEL_BYTES];
8830 add_abstract_origin_attribute (lbl_die, origin);
8832 add_name_and_src_coords_attributes (lbl_die, decl);
8834 if (DECL_ABSTRACT (decl))
8835 equate_decl_number_to_die (decl, lbl_die);
8838 insn = DECL_RTL (decl);
8840 /* Deleted labels are programmer specified labels which have been
8841 eliminated because of various optimisations. We still emit them
8842 here so that it is possible to put breakpoints on them. */
8843 if (GET_CODE (insn) == CODE_LABEL
8844 || ((GET_CODE (insn) == NOTE
8845 && NOTE_LINE_NUMBER (insn) == NOTE_INSN_DELETED_LABEL)))
8847 /* When optimization is enabled (via -O) some parts of the compiler
8848 (e.g. jump.c and cse.c) may try to delete CODE_LABEL insns which
8849 represent source-level labels which were explicitly declared by
8850 the user. This really shouldn't be happening though, so catch
8851 it if it ever does happen. */
8852 if (INSN_DELETED_P (insn))
8855 sprintf (label2, INSN_LABEL_FMT, current_funcdef_number);
8856 ASM_GENERATE_INTERNAL_LABEL (label, label2,
8857 (unsigned) INSN_UID (insn));
8858 add_AT_lbl_id (lbl_die, DW_AT_low_pc, label);
8863 /* Generate a DIE for a lexical block. */
8866 gen_lexical_block_die (stmt, context_die, depth)
8868 register dw_die_ref context_die;
8871 register dw_die_ref stmt_die = new_die (DW_TAG_lexical_block, context_die);
8872 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8874 if (! BLOCK_ABSTRACT (stmt))
8876 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8877 BLOCK_NUMBER (stmt));
8878 add_AT_lbl_id (stmt_die, DW_AT_low_pc, label);
8879 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
8880 BLOCK_NUMBER (stmt));
8881 add_AT_lbl_id (stmt_die, DW_AT_high_pc, label);
8884 decls_for_scope (stmt, stmt_die, depth);
8887 /* Generate a DIE for an inlined subprogram. */
8890 gen_inlined_subroutine_die (stmt, context_die, depth)
8892 register dw_die_ref context_die;
8895 if (! BLOCK_ABSTRACT (stmt))
8897 register dw_die_ref subr_die
8898 = new_die (DW_TAG_inlined_subroutine, context_die);
8899 register tree decl = block_ultimate_origin (stmt);
8900 char label[MAX_ARTIFICIAL_LABEL_BYTES];
8902 /* Emit info for the abstract instance first, if we haven't yet. */
8903 gen_abstract_function (decl);
8905 add_abstract_origin_attribute (subr_die, decl);
8906 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_BEGIN_LABEL,
8907 BLOCK_NUMBER (stmt));
8908 add_AT_lbl_id (subr_die, DW_AT_low_pc, label);
8909 ASM_GENERATE_INTERNAL_LABEL (label, BLOCK_END_LABEL,
8910 BLOCK_NUMBER (stmt));
8911 add_AT_lbl_id (subr_die, DW_AT_high_pc, label);
8912 decls_for_scope (stmt, subr_die, depth);
8913 current_function_has_inlines = 1;
8917 /* Generate a DIE for a field in a record, or structure. */
8920 gen_field_die (decl, context_die)
8922 register dw_die_ref context_die;
8924 register dw_die_ref decl_die = new_die (DW_TAG_member, context_die);
8926 add_name_and_src_coords_attributes (decl_die, decl);
8927 add_type_attribute (decl_die, member_declared_type (decl),
8928 TREE_READONLY (decl), TREE_THIS_VOLATILE (decl),
8931 /* If this is a bit field... */
8932 if (DECL_BIT_FIELD_TYPE (decl))
8934 add_byte_size_attribute (decl_die, decl);
8935 add_bit_size_attribute (decl_die, decl);
8936 add_bit_offset_attribute (decl_die, decl);
8939 if (TREE_CODE (DECL_FIELD_CONTEXT (decl)) != UNION_TYPE)
8940 add_data_member_location_attribute (decl_die, decl);
8942 if (DECL_ARTIFICIAL (decl))
8943 add_AT_flag (decl_die, DW_AT_artificial, 1);
8945 if (TREE_PROTECTED (decl))
8946 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_protected);
8948 else if (TREE_PRIVATE (decl))
8949 add_AT_unsigned (decl_die, DW_AT_accessibility, DW_ACCESS_private);
8953 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8954 Use modified_type_die instead.
8955 We keep this code here just in case these types of DIEs may be needed to
8956 represent certain things in other languages (e.g. Pascal) someday. */
8958 gen_pointer_type_die (type, context_die)
8960 register dw_die_ref context_die;
8962 register dw_die_ref ptr_die
8963 = new_die (DW_TAG_pointer_type, scope_die_for (type, context_die));
8965 equate_type_number_to_die (type, ptr_die);
8966 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
8967 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8970 /* Don't generate either pointer_type DIEs or reference_type DIEs here.
8971 Use modified_type_die instead.
8972 We keep this code here just in case these types of DIEs may be needed to
8973 represent certain things in other languages (e.g. Pascal) someday. */
8975 gen_reference_type_die (type, context_die)
8977 register dw_die_ref context_die;
8979 register dw_die_ref ref_die
8980 = new_die (DW_TAG_reference_type, scope_die_for (type, context_die));
8982 equate_type_number_to_die (type, ref_die);
8983 add_type_attribute (ref_die, TREE_TYPE (type), 0, 0, context_die);
8984 add_AT_unsigned (mod_type_die, DW_AT_byte_size, PTR_SIZE);
8988 /* Generate a DIE for a pointer to a member type. */
8990 gen_ptr_to_mbr_type_die (type, context_die)
8992 register dw_die_ref context_die;
8994 register dw_die_ref ptr_die
8995 = new_die (DW_TAG_ptr_to_member_type, scope_die_for (type, context_die));
8997 equate_type_number_to_die (type, ptr_die);
8998 add_AT_die_ref (ptr_die, DW_AT_containing_type,
8999 lookup_type_die (TYPE_OFFSET_BASETYPE (type)));
9000 add_type_attribute (ptr_die, TREE_TYPE (type), 0, 0, context_die);
9003 /* Generate the DIE for the compilation unit. */
9006 gen_compile_unit_die (filename)
9007 register const char *filename;
9009 register dw_die_ref die;
9011 const char *wd = getpwd ();
9014 die = new_die (DW_TAG_compile_unit, NULL);
9015 add_name_attribute (die, filename);
9017 if (wd != NULL && filename[0] != DIR_SEPARATOR)
9018 add_AT_string (die, DW_AT_comp_dir, wd);
9020 sprintf (producer, "%s %s", language_string, version_string);
9022 #ifdef MIPS_DEBUGGING_INFO
9023 /* The MIPS/SGI compilers place the 'cc' command line options in the producer
9024 string. The SGI debugger looks for -g, -g1, -g2, or -g3; if they do
9025 not appear in the producer string, the debugger reaches the conclusion
9026 that the object file is stripped and has no debugging information.
9027 To get the MIPS/SGI debugger to believe that there is debugging
9028 information in the object file, we add a -g to the producer string. */
9029 if (debug_info_level > DINFO_LEVEL_TERSE)
9030 strcat (producer, " -g");
9033 add_AT_string (die, DW_AT_producer, producer);
9035 if (strcmp (language_string, "GNU C++") == 0)
9036 language = DW_LANG_C_plus_plus;
9037 else if (strcmp (language_string, "GNU Ada") == 0)
9038 language = DW_LANG_Ada83;
9039 else if (strcmp (language_string, "GNU F77") == 0)
9040 language = DW_LANG_Fortran77;
9041 else if (strcmp (language_string, "GNU Pascal") == 0)
9042 language = DW_LANG_Pascal83;
9043 else if (strcmp (language_string, "GNU Java") == 0)
9044 language = DW_LANG_Java;
9045 else if (flag_traditional)
9046 language = DW_LANG_C;
9048 language = DW_LANG_C89;
9050 add_AT_unsigned (die, DW_AT_language, language);
9055 /* Generate a DIE for a string type. */
9058 gen_string_type_die (type, context_die)
9060 register dw_die_ref context_die;
9062 register dw_die_ref type_die
9063 = new_die (DW_TAG_string_type, scope_die_for (type, context_die));
9065 equate_type_number_to_die (type, type_die);
9067 /* Fudge the string length attribute for now. */
9069 /* TODO: add string length info.
9070 string_length_attribute (TYPE_MAX_VALUE (TYPE_DOMAIN (type)));
9071 bound_representation (upper_bound, 0, 'u'); */
9074 /* Generate the DIE for a base class. */
9077 gen_inheritance_die (binfo, context_die)
9078 register tree binfo;
9079 register dw_die_ref context_die;
9081 dw_die_ref die = new_die (DW_TAG_inheritance, context_die);
9083 add_type_attribute (die, BINFO_TYPE (binfo), 0, 0, context_die);
9084 add_data_member_location_attribute (die, binfo);
9086 if (TREE_VIA_VIRTUAL (binfo))
9087 add_AT_unsigned (die, DW_AT_virtuality, DW_VIRTUALITY_virtual);
9088 if (TREE_VIA_PUBLIC (binfo))
9089 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_public);
9090 else if (TREE_VIA_PROTECTED (binfo))
9091 add_AT_unsigned (die, DW_AT_accessibility, DW_ACCESS_protected);
9094 /* Generate a DIE for a class member. */
9097 gen_member_die (type, context_die)
9099 register dw_die_ref context_die;
9101 register tree member;
9104 /* If this is not an incomplete type, output descriptions of each of its
9105 members. Note that as we output the DIEs necessary to represent the
9106 members of this record or union type, we will also be trying to output
9107 DIEs to represent the *types* of those members. However the `type'
9108 function (above) will specifically avoid generating type DIEs for member
9109 types *within* the list of member DIEs for this (containing) type execpt
9110 for those types (of members) which are explicitly marked as also being
9111 members of this (containing) type themselves. The g++ front- end can
9112 force any given type to be treated as a member of some other
9113 (containing) type by setting the TYPE_CONTEXT of the given (member) type
9114 to point to the TREE node representing the appropriate (containing)
9117 /* First output info about the base classes. */
9118 if (TYPE_BINFO (type) && TYPE_BINFO_BASETYPES (type))
9120 register tree bases = TYPE_BINFO_BASETYPES (type);
9121 register int n_bases = TREE_VEC_LENGTH (bases);
9124 for (i = 0; i < n_bases; i++)
9125 gen_inheritance_die (TREE_VEC_ELT (bases, i), context_die);
9128 /* Now output info about the data members and type members. */
9129 for (member = TYPE_FIELDS (type); member; member = TREE_CHAIN (member))
9131 /* If we thought we were generating minimal debug info for TYPE
9132 and then changed our minds, some of the member declarations
9133 may have already been defined. Don't define them again, but
9134 do put them in the right order. */
9136 child = lookup_decl_die (member);
9138 splice_child_die (context_die, child);
9140 gen_decl_die (member, context_die);
9143 /* Now output info about the function members (if any). */
9144 for (member = TYPE_METHODS (type); member; member = TREE_CHAIN (member))
9146 child = lookup_decl_die (member);
9148 splice_child_die (context_die, child);
9150 gen_decl_die (member, context_die);
9154 /* Generate a DIE for a structure or union type. If TYPE_DECL_SUPPRESS_DEBUG
9155 is set, we pretend that the type was never defined, so we only get the
9156 member DIEs needed by later specification DIEs. */
9159 gen_struct_or_union_type_die (type, context_die)
9161 register dw_die_ref context_die;
9163 register dw_die_ref type_die = lookup_type_die (type);
9164 register dw_die_ref scope_die = 0;
9165 register int nested = 0;
9166 int complete = (TYPE_SIZE (type)
9167 && (! TYPE_STUB_DECL (type)
9168 || ! TYPE_DECL_SUPPRESS_DEBUG (TYPE_STUB_DECL (type))));
9170 if (type_die && ! complete)
9173 if (TYPE_CONTEXT (type) != NULL_TREE
9174 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type)))
9177 scope_die = scope_die_for (type, context_die);
9179 if (! type_die || (nested && scope_die == comp_unit_die))
9180 /* First occurrence of type or toplevel definition of nested class. */
9182 register dw_die_ref old_die = type_die;
9184 type_die = new_die (TREE_CODE (type) == RECORD_TYPE
9185 ? DW_TAG_structure_type : DW_TAG_union_type,
9187 equate_type_number_to_die (type, type_die);
9188 add_name_attribute (type_die, type_tag (type));
9190 add_AT_die_ref (type_die, DW_AT_specification, old_die);
9193 remove_AT (type_die, DW_AT_declaration);
9195 /* If this type has been completed, then give it a byte_size attribute and
9196 then give a list of members. */
9199 /* Prevent infinite recursion in cases where the type of some member of
9200 this type is expressed in terms of this type itself. */
9201 TREE_ASM_WRITTEN (type) = 1;
9202 add_byte_size_attribute (type_die, type);
9203 if (TYPE_STUB_DECL (type) != NULL_TREE)
9204 add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
9206 /* If the first reference to this type was as the return type of an
9207 inline function, then it may not have a parent. Fix this now. */
9208 if (type_die->die_parent == NULL)
9209 add_child_die (scope_die, type_die);
9211 push_decl_scope (type);
9212 gen_member_die (type, type_die);
9215 /* GNU extension: Record what type our vtable lives in. */
9216 if (TYPE_VFIELD (type))
9218 tree vtype = DECL_FCONTEXT (TYPE_VFIELD (type));
9220 gen_type_die (vtype, context_die);
9221 add_AT_die_ref (type_die, DW_AT_containing_type,
9222 lookup_type_die (vtype));
9227 add_AT_flag (type_die, DW_AT_declaration, 1);
9229 /* We don't need to do this for function-local types. */
9230 if (! decl_function_context (TYPE_STUB_DECL (type)))
9231 add_incomplete_type (type);
9235 /* Generate a DIE for a subroutine _type_. */
9238 gen_subroutine_type_die (type, context_die)
9240 register dw_die_ref context_die;
9242 register tree return_type = TREE_TYPE (type);
9243 register dw_die_ref subr_die
9244 = new_die (DW_TAG_subroutine_type, scope_die_for (type, context_die));
9246 equate_type_number_to_die (type, subr_die);
9247 add_prototyped_attribute (subr_die, type);
9248 add_type_attribute (subr_die, return_type, 0, 0, context_die);
9249 gen_formal_types_die (type, subr_die);
9252 /* Generate a DIE for a type definition */
9255 gen_typedef_die (decl, context_die)
9257 register dw_die_ref context_die;
9259 register dw_die_ref type_die;
9260 register tree origin;
9262 if (TREE_ASM_WRITTEN (decl))
9264 TREE_ASM_WRITTEN (decl) = 1;
9266 type_die = new_die (DW_TAG_typedef, context_die);
9267 origin = decl_ultimate_origin (decl);
9269 add_abstract_origin_attribute (type_die, origin);
9273 add_name_and_src_coords_attributes (type_die, decl);
9274 if (DECL_ORIGINAL_TYPE (decl))
9276 type = DECL_ORIGINAL_TYPE (decl);
9278 if (type == TREE_TYPE (decl))
9281 equate_type_number_to_die (TREE_TYPE (decl), type_die);
9284 type = TREE_TYPE (decl);
9285 add_type_attribute (type_die, type, TREE_READONLY (decl),
9286 TREE_THIS_VOLATILE (decl), context_die);
9289 if (DECL_ABSTRACT (decl))
9290 equate_decl_number_to_die (decl, type_die);
9293 /* Generate a type description DIE. */
9296 gen_type_die (type, context_die)
9298 register dw_die_ref context_die;
9302 if (type == NULL_TREE || type == error_mark_node)
9305 /* We are going to output a DIE to represent the unqualified version of
9306 this type (i.e. without any const or volatile qualifiers) so get the
9307 main variant (i.e. the unqualified version) of this type now. */
9308 type = type_main_variant (type);
9310 if (TREE_ASM_WRITTEN (type))
9313 if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9314 && DECL_ORIGINAL_TYPE (TYPE_NAME (type)))
9316 TREE_ASM_WRITTEN (type) = 1;
9317 gen_decl_die (TYPE_NAME (type), context_die);
9321 switch (TREE_CODE (type))
9327 case REFERENCE_TYPE:
9328 /* We must set TREE_ASM_WRITTEN in case this is a recursive type. This
9329 ensures that the gen_type_die recursion will terminate even if the
9330 type is recursive. Recursive types are possible in Ada. */
9331 /* ??? We could perhaps do this for all types before the switch
9333 TREE_ASM_WRITTEN (type) = 1;
9335 /* For these types, all that is required is that we output a DIE (or a
9336 set of DIEs) to represent the "basis" type. */
9337 gen_type_die (TREE_TYPE (type), context_die);
9341 /* This code is used for C++ pointer-to-data-member types.
9342 Output a description of the relevant class type. */
9343 gen_type_die (TYPE_OFFSET_BASETYPE (type), context_die);
9345 /* Output a description of the type of the object pointed to. */
9346 gen_type_die (TREE_TYPE (type), context_die);
9348 /* Now output a DIE to represent this pointer-to-data-member type
9350 gen_ptr_to_mbr_type_die (type, context_die);
9354 gen_type_die (TYPE_DOMAIN (type), context_die);
9355 gen_set_type_die (type, context_die);
9359 gen_type_die (TREE_TYPE (type), context_die);
9360 abort (); /* No way to represent these in Dwarf yet! */
9364 /* Force out return type (in case it wasn't forced out already). */
9365 gen_type_die (TREE_TYPE (type), context_die);
9366 gen_subroutine_type_die (type, context_die);
9370 /* Force out return type (in case it wasn't forced out already). */
9371 gen_type_die (TREE_TYPE (type), context_die);
9372 gen_subroutine_type_die (type, context_die);
9376 if (TYPE_STRING_FLAG (type) && TREE_CODE (TREE_TYPE (type)) == CHAR_TYPE)
9378 gen_type_die (TREE_TYPE (type), context_die);
9379 gen_string_type_die (type, context_die);
9382 gen_array_type_die (type, context_die);
9386 gen_type_die (TYPE_DEBUG_REPRESENTATION_TYPE (type), context_die);
9392 case QUAL_UNION_TYPE:
9393 /* If this is a nested type whose containing class hasn't been
9394 written out yet, writing it out will cover this one, too.
9395 This does not apply to instantiations of member class templates;
9396 they need to be added to the containing class as they are
9397 generated. FIXME: This hurts the idea of combining type decls
9398 from multiple TUs, since we can't predict what set of template
9399 instantiations we'll get. */
9400 if (TYPE_CONTEXT (type)
9401 && AGGREGATE_TYPE_P (TYPE_CONTEXT (type))
9402 && ! TREE_ASM_WRITTEN (TYPE_CONTEXT (type)))
9404 gen_type_die (TYPE_CONTEXT (type), context_die);
9406 if (TREE_ASM_WRITTEN (type))
9409 /* If that failed, attach ourselves to the stub. */
9410 push_decl_scope (TYPE_CONTEXT (type));
9411 context_die = lookup_type_die (TYPE_CONTEXT (type));
9417 if (TREE_CODE (type) == ENUMERAL_TYPE)
9418 gen_enumeration_type_die (type, context_die);
9420 gen_struct_or_union_type_die (type, context_die);
9425 /* Don't set TREE_ASM_WRITTEN on an incomplete struct; we want to fix
9426 it up if it is ever completed. gen_*_type_die will set it for us
9427 when appropriate. */
9436 /* No DIEs needed for fundamental types. */
9440 /* No Dwarf representation currently defined. */
9447 TREE_ASM_WRITTEN (type) = 1;
9450 /* Generate a DIE for a tagged type instantiation. */
9453 gen_tagged_type_instantiation_die (type, context_die)
9455 register dw_die_ref context_die;
9457 if (type == NULL_TREE || type == error_mark_node)
9460 /* We are going to output a DIE to represent the unqualified version of
9461 this type (i.e. without any const or volatile qualifiers) so make sure
9462 that we have the main variant (i.e. the unqualified version) of this
9464 if (type != type_main_variant (type))
9467 /* Do not check TREE_ASM_WRITTEN (type) as it may not be set if this is
9468 an instance of an unresolved type. */
9470 switch (TREE_CODE (type))
9476 gen_inlined_enumeration_type_die (type, context_die);
9480 gen_inlined_structure_type_die (type, context_die);
9484 case QUAL_UNION_TYPE:
9485 gen_inlined_union_type_die (type, context_die);
9493 /* Generate a DW_TAG_lexical_block DIE followed by DIEs to represent all of the
9494 things which are local to the given block. */
9497 gen_block_die (stmt, context_die, depth)
9499 register dw_die_ref context_die;
9502 register int must_output_die = 0;
9503 register tree origin;
9505 register enum tree_code origin_code;
9507 /* Ignore blocks never really used to make RTL. */
9509 if (stmt == NULL_TREE || !TREE_USED (stmt)
9510 || (!TREE_ASM_WRITTEN (stmt) && !BLOCK_ABSTRACT (stmt)))
9513 /* Determine the "ultimate origin" of this block. This block may be an
9514 inlined instance of an inlined instance of inline function, so we have
9515 to trace all of the way back through the origin chain to find out what
9516 sort of node actually served as the original seed for the creation of
9517 the current block. */
9518 origin = block_ultimate_origin (stmt);
9519 origin_code = (origin != NULL) ? TREE_CODE (origin) : ERROR_MARK;
9521 /* Determine if we need to output any Dwarf DIEs at all to represent this
9523 if (origin_code == FUNCTION_DECL)
9524 /* The outer scopes for inlinings *must* always be represented. We
9525 generate DW_TAG_inlined_subroutine DIEs for them. (See below.) */
9526 must_output_die = 1;
9529 /* In the case where the current block represents an inlining of the
9530 "body block" of an inline function, we must *NOT* output any DIE for
9531 this block because we have already output a DIE to represent the
9532 whole inlined function scope and the "body block" of any function
9533 doesn't really represent a different scope according to ANSI C
9534 rules. So we check here to make sure that this block does not
9535 represent a "body block inlining" before trying to set the
9536 `must_output_die' flag. */
9537 if (! is_body_block (origin ? origin : stmt))
9539 /* Determine if this block directly contains any "significant"
9540 local declarations which we will need to output DIEs for. */
9541 if (debug_info_level > DINFO_LEVEL_TERSE)
9542 /* We are not in terse mode so *any* local declaration counts
9543 as being a "significant" one. */
9544 must_output_die = (BLOCK_VARS (stmt) != NULL);
9546 /* We are in terse mode, so only local (nested) function
9547 definitions count as "significant" local declarations. */
9548 for (decl = BLOCK_VARS (stmt);
9549 decl != NULL; decl = TREE_CHAIN (decl))
9550 if (TREE_CODE (decl) == FUNCTION_DECL
9551 && DECL_INITIAL (decl))
9553 must_output_die = 1;
9559 /* It would be a waste of space to generate a Dwarf DW_TAG_lexical_block
9560 DIE for any block which contains no significant local declarations at
9561 all. Rather, in such cases we just call `decls_for_scope' so that any
9562 needed Dwarf info for any sub-blocks will get properly generated. Note
9563 that in terse mode, our definition of what constitutes a "significant"
9564 local declaration gets restricted to include only inlined function
9565 instances and local (nested) function definitions. */
9566 if (must_output_die)
9568 if (origin_code == FUNCTION_DECL)
9569 gen_inlined_subroutine_die (stmt, context_die, depth);
9571 gen_lexical_block_die (stmt, context_die, depth);
9574 decls_for_scope (stmt, context_die, depth);
9577 /* Generate all of the decls declared within a given scope and (recursively)
9578 all of its sub-blocks. */
9581 decls_for_scope (stmt, context_die, depth)
9583 register dw_die_ref context_die;
9587 register tree subblocks;
9589 /* Ignore blocks never really used to make RTL. */
9590 if (stmt == NULL_TREE || ! TREE_USED (stmt))
9593 /* Output the DIEs to represent all of the data objects and typedefs
9594 declared directly within this block but not within any nested
9595 sub-blocks. Also, nested function and tag DIEs have been
9596 generated with a parent of NULL; fix that up now. */
9597 for (decl = BLOCK_VARS (stmt);
9598 decl != NULL; decl = TREE_CHAIN (decl))
9600 register dw_die_ref die;
9602 if (TREE_CODE (decl) == FUNCTION_DECL)
9603 die = lookup_decl_die (decl);
9604 else if (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl))
9605 die = lookup_type_die (TREE_TYPE (decl));
9609 if (die != NULL && die->die_parent == NULL)
9610 add_child_die (context_die, die);
9612 gen_decl_die (decl, context_die);
9615 /* Output the DIEs to represent all sub-blocks (and the items declared
9616 therein) of this block. */
9617 for (subblocks = BLOCK_SUBBLOCKS (stmt);
9619 subblocks = BLOCK_CHAIN (subblocks))
9620 gen_block_die (subblocks, context_die, depth + 1);
9623 /* Is this a typedef we can avoid emitting? */
9626 is_redundant_typedef (decl)
9629 if (TYPE_DECL_IS_STUB (decl))
9632 if (DECL_ARTIFICIAL (decl)
9633 && DECL_CONTEXT (decl)
9634 && is_tagged_type (DECL_CONTEXT (decl))
9635 && TREE_CODE (TYPE_NAME (DECL_CONTEXT (decl))) == TYPE_DECL
9636 && DECL_NAME (decl) == DECL_NAME (TYPE_NAME (DECL_CONTEXT (decl))))
9637 /* Also ignore the artificial member typedef for the class name. */
9643 /* Generate Dwarf debug information for a decl described by DECL. */
9646 gen_decl_die (decl, context_die)
9648 register dw_die_ref context_die;
9650 register tree origin;
9652 if (TREE_CODE (decl) == ERROR_MARK)
9655 /* If this ..._DECL node is marked to be ignored, then ignore it. */
9656 if (DECL_IGNORED_P (decl))
9659 switch (TREE_CODE (decl))
9662 /* The individual enumerators of an enum type get output when we output
9663 the Dwarf representation of the relevant enum type itself. */
9667 /* Don't output any DIEs to represent mere function declarations,
9668 unless they are class members or explicit block externs. */
9669 if (DECL_INITIAL (decl) == NULL_TREE && DECL_CONTEXT (decl) == NULL_TREE
9670 && (current_function_decl == NULL_TREE || DECL_ARTIFICIAL (decl)))
9673 /* If we're emitting an out-of-line copy of an inline function,
9674 emit info for the abstract instance and set up to refer to it. */
9675 if (DECL_INLINE (decl) && ! DECL_ABSTRACT (decl)
9676 && ! class_scope_p (context_die)
9677 /* gen_abstract_function won't emit a die if this is just a
9678 declaration. We must avoid setting DECL_ABSTRACT_ORIGIN in
9679 that case, because that works only if we have a die. */
9680 && DECL_INITIAL (decl) != NULL_TREE)
9682 gen_abstract_function (decl);
9683 set_decl_origin_self (decl);
9686 if (debug_info_level > DINFO_LEVEL_TERSE)
9688 /* Before we describe the FUNCTION_DECL itself, make sure that we
9689 have described its return type. */
9690 gen_type_die (TREE_TYPE (TREE_TYPE (decl)), context_die);
9692 /* And its virtual context. */
9693 if (DECL_VINDEX (decl) != NULL_TREE)
9694 gen_type_die (DECL_CONTEXT (decl), context_die);
9696 /* And its containing type. */
9697 origin = decl_class_context (decl);
9698 if (origin != NULL_TREE)
9699 gen_type_die_for_member (origin, decl, context_die);
9702 /* Now output a DIE to represent the function itself. */
9703 gen_subprogram_die (decl, context_die);
9707 /* If we are in terse mode, don't generate any DIEs to represent any
9709 if (debug_info_level <= DINFO_LEVEL_TERSE)
9712 /* In the special case of a TYPE_DECL node representing the
9713 declaration of some type tag, if the given TYPE_DECL is marked as
9714 having been instantiated from some other (original) TYPE_DECL node
9715 (e.g. one which was generated within the original definition of an
9716 inline function) we have to generate a special (abbreviated)
9717 DW_TAG_structure_type, DW_TAG_union_type, or DW_TAG_enumeration_type
9719 if (TYPE_DECL_IS_STUB (decl) && decl_ultimate_origin (decl) != NULL_TREE)
9721 gen_tagged_type_instantiation_die (TREE_TYPE (decl), context_die);
9725 if (is_redundant_typedef (decl))
9726 gen_type_die (TREE_TYPE (decl), context_die);
9728 /* Output a DIE to represent the typedef itself. */
9729 gen_typedef_die (decl, context_die);
9733 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9734 gen_label_die (decl, context_die);
9738 /* If we are in terse mode, don't generate any DIEs to represent any
9739 variable declarations or definitions. */
9740 if (debug_info_level <= DINFO_LEVEL_TERSE)
9743 /* Output any DIEs that are needed to specify the type of this data
9745 gen_type_die (TREE_TYPE (decl), context_die);
9747 /* And its containing type. */
9748 origin = decl_class_context (decl);
9749 if (origin != NULL_TREE)
9750 gen_type_die_for_member (origin, decl, context_die);
9752 /* Now output the DIE to represent the data object itself. This gets
9753 complicated because of the possibility that the VAR_DECL really
9754 represents an inlined instance of a formal parameter for an inline
9756 origin = decl_ultimate_origin (decl);
9757 if (origin != NULL_TREE && TREE_CODE (origin) == PARM_DECL)
9758 gen_formal_parameter_die (decl, context_die);
9760 gen_variable_die (decl, context_die);
9764 /* Ignore the nameless fields that are used to skip bits, but
9765 handle C++ anonymous unions. */
9766 if (DECL_NAME (decl) != NULL_TREE
9767 || TREE_CODE (TREE_TYPE (decl)) == UNION_TYPE)
9769 gen_type_die (member_declared_type (decl), context_die);
9770 gen_field_die (decl, context_die);
9775 gen_type_die (TREE_TYPE (decl), context_die);
9776 gen_formal_parameter_die (decl, context_die);
9779 case NAMESPACE_DECL:
9780 /* Ignore for now. */
9788 /* Add Ada "use" clause information for SGI Workshop debugger. */
9791 dwarf2out_add_library_unit_info (filename, context_list)
9792 const char *filename;
9793 const char *context_list;
9795 unsigned int file_index;
9797 if (filename != NULL)
9799 dw_die_ref unit_die = new_die (DW_TAG_module, comp_unit_die);
9800 tree context_list_decl
9801 = build_decl (LABEL_DECL, get_identifier (context_list),
9804 TREE_PUBLIC (context_list_decl) = TRUE;
9805 add_name_attribute (unit_die, context_list);
9806 file_index = lookup_filename (filename);
9807 add_AT_unsigned (unit_die, DW_AT_decl_file, file_index);
9808 add_pubname (context_list_decl, unit_die);
9812 /* Write the debugging output for DECL. */
9815 dwarf2out_decl (decl)
9818 register dw_die_ref context_die = comp_unit_die;
9820 if (TREE_CODE (decl) == ERROR_MARK)
9823 /* If this ..._DECL node is marked to be ignored, then ignore it. */
9824 if (DECL_IGNORED_P (decl))
9827 switch (TREE_CODE (decl))
9830 /* Ignore this FUNCTION_DECL if it refers to a builtin declaration of a
9831 builtin function. Explicit programmer-supplied declarations of
9832 these same functions should NOT be ignored however. */
9833 if (DECL_EXTERNAL (decl) && DECL_BUILT_IN (decl))
9836 /* What we would really like to do here is to filter out all mere
9837 file-scope declarations of file-scope functions which are never
9838 referenced later within this translation unit (and keep all of ones
9839 that *are* referenced later on) but we aren't clairvoyant, so we have
9840 no idea which functions will be referenced in the future (i.e. later
9841 on within the current translation unit). So here we just ignore all
9842 file-scope function declarations which are not also definitions. If
9843 and when the debugger needs to know something about these functions,
9844 it will have to hunt around and find the DWARF information associated
9845 with the definition of the function. Note that we can't just check
9846 `DECL_EXTERNAL' to find out which FUNCTION_DECL nodes represent
9847 definitions and which ones represent mere declarations. We have to
9848 check `DECL_INITIAL' instead. That's because the C front-end
9849 supports some weird semantics for "extern inline" function
9850 definitions. These can get inlined within the current translation
9851 unit (an thus, we need to generate DWARF info for their abstract
9852 instances so that the DWARF info for the concrete inlined instances
9853 can have something to refer to) but the compiler never generates any
9854 out-of-lines instances of such things (despite the fact that they
9855 *are* definitions). The important point is that the C front-end
9856 marks these "extern inline" functions as DECL_EXTERNAL, but we need
9857 to generate DWARF for them anyway. Note that the C++ front-end also
9858 plays some similar games for inline function definitions appearing
9859 within include files which also contain
9860 `#pragma interface' pragmas. */
9861 if (DECL_INITIAL (decl) == NULL_TREE)
9864 /* If we're a nested function, initially use a parent of NULL; if we're
9865 a plain function, this will be fixed up in decls_for_scope. If
9866 we're a method, it will be ignored, since we already have a DIE. */
9867 if (decl_function_context (decl))
9873 /* Ignore this VAR_DECL if it refers to a file-scope extern data object
9874 declaration and if the declaration was never even referenced from
9875 within this entire compilation unit. We suppress these DIEs in
9876 order to save space in the .debug section (by eliminating entries
9877 which are probably useless). Note that we must not suppress
9878 block-local extern declarations (whether used or not) because that
9879 would screw-up the debugger's name lookup mechanism and cause it to
9880 miss things which really ought to be in scope at a given point. */
9881 if (DECL_EXTERNAL (decl) && !TREE_USED (decl))
9884 /* If we are in terse mode, don't generate any DIEs to represent any
9885 variable declarations or definitions. */
9886 if (debug_info_level <= DINFO_LEVEL_TERSE)
9891 /* Don't emit stubs for types unless they are needed by other DIEs. */
9892 if (TYPE_DECL_SUPPRESS_DEBUG (decl))
9895 /* Don't bother trying to generate any DIEs to represent any of the
9896 normal built-in types for the language we are compiling. */
9897 if (DECL_SOURCE_LINE (decl) == 0)
9899 /* OK, we need to generate one for `bool' so GDB knows what type
9900 comparisons have. */
9901 if ((get_AT_unsigned (comp_unit_die, DW_AT_language)
9902 == DW_LANG_C_plus_plus)
9903 && TREE_CODE (TREE_TYPE (decl)) == BOOLEAN_TYPE)
9904 modified_type_die (TREE_TYPE (decl), 0, 0, NULL);
9909 /* If we are in terse mode, don't generate any DIEs for types. */
9910 if (debug_info_level <= DINFO_LEVEL_TERSE)
9913 /* If we're a function-scope tag, initially use a parent of NULL;
9914 this will be fixed up in decls_for_scope. */
9915 if (decl_function_context (decl))
9924 gen_decl_die (decl, context_die);
9927 /* Output a marker (i.e. a label) for the beginning of the generated code for
9931 dwarf2out_begin_block (blocknum)
9932 register unsigned blocknum;
9934 function_section (current_function_decl);
9935 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_BEGIN_LABEL, blocknum);
9938 /* Output a marker (i.e. a label) for the end of the generated code for a
9942 dwarf2out_end_block (blocknum)
9943 register unsigned blocknum;
9945 function_section (current_function_decl);
9946 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BLOCK_END_LABEL, blocknum);
9949 /* Returns nonzero if it is appropriate not to emit any debugging
9950 information for BLOCK, because it doesn't contain any instructions.
9952 Don't allow this for blocks with nested functions or local classes
9953 as we would end up with orphans, and in the presence of scheduling
9954 we may end up calling them anyway. */
9957 dwarf2out_ignore_block (block)
9961 for (decl = BLOCK_VARS (block); decl; decl = TREE_CHAIN (decl))
9962 if (TREE_CODE (decl) == FUNCTION_DECL
9963 || (TREE_CODE (decl) == TYPE_DECL && TYPE_DECL_IS_STUB (decl)))
9968 /* Output a marker (i.e. a label) at a point in the assembly code which
9969 corresponds to a given source level label. */
9972 dwarf2out_label (insn)
9975 char label[MAX_ARTIFICIAL_LABEL_BYTES];
9977 if (debug_info_level >= DINFO_LEVEL_NORMAL)
9979 function_section (current_function_decl);
9980 sprintf (label, INSN_LABEL_FMT, current_funcdef_number);
9981 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, label,
9982 (unsigned) INSN_UID (insn));
9986 /* Lookup a filename (in the list of filenames that we know about here in
9987 dwarf2out.c) and return its "index". The index of each (known) filename is
9988 just a unique number which is associated with only that one filename.
9989 We need such numbers for the sake of generating labels
9990 (in the .debug_sfnames section) and references to those
9991 files numbers (in the .debug_srcinfo and.debug_macinfo sections).
9992 If the filename given as an argument is not found in our current list,
9993 add it to the list and assign it the next available unique index number.
9994 In order to speed up searches, we remember the index of the filename
9995 was looked up last. This handles the majority of all searches. */
9998 lookup_filename (file_name)
9999 const char *file_name;
10001 static unsigned last_file_lookup_index = 0;
10002 register unsigned i;
10004 /* Check to see if the file name that was searched on the previous call
10005 matches this file name. If so, return the index. */
10006 if (last_file_lookup_index != 0)
10007 if (strcmp (file_name, file_table[last_file_lookup_index]) == 0)
10008 return last_file_lookup_index;
10010 /* Didn't match the previous lookup, search the table */
10011 for (i = 1; i < file_table_in_use; ++i)
10012 if (strcmp (file_name, file_table[i]) == 0)
10014 last_file_lookup_index = i;
10018 /* Prepare to add a new table entry by making sure there is enough space in
10019 the table to do so. If not, expand the current table. */
10020 if (file_table_in_use == file_table_allocated)
10022 file_table_allocated += FILE_TABLE_INCREMENT;
10024 = (char **) xrealloc (file_table,
10025 file_table_allocated * sizeof (char *));
10028 /* Add the new entry to the end of the filename table. */
10029 file_table[file_table_in_use] = xstrdup (file_name);
10030 last_file_lookup_index = file_table_in_use++;
10032 return last_file_lookup_index;
10035 /* Output a label to mark the beginning of a source code line entry
10036 and record information relating to this source line, in
10037 'line_info_table' for later output of the .debug_line section. */
10040 dwarf2out_line (filename, line)
10041 register const char *filename;
10042 register unsigned line;
10044 if (debug_info_level >= DINFO_LEVEL_NORMAL)
10046 function_section (current_function_decl);
10048 if (DWARF2_ASM_LINE_DEBUG_INFO)
10050 static const char *lastfile;
10052 /* Emit the .file and .loc directives understood by GNU as. */
10053 if (lastfile == 0 || strcmp (filename, lastfile))
10056 ggc_add_string_root ((char **) &lastfile, 1);
10058 fprintf (asm_out_file, "\t.file 0 \"%s\"\n", filename);
10059 lastfile = filename;
10062 fprintf (asm_out_file, "\t.loc 0 %d 0\n", line);
10064 /* Indicate that line number info exists. */
10065 ++line_info_table_in_use;
10067 /* Indicate that multiple line number tables exist. */
10068 if (DECL_SECTION_NAME (current_function_decl))
10069 ++separate_line_info_table_in_use;
10071 else if (DECL_SECTION_NAME (current_function_decl))
10073 register dw_separate_line_info_ref line_info;
10074 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, SEPARATE_LINE_CODE_LABEL,
10075 separate_line_info_table_in_use);
10076 if (flag_debug_asm)
10077 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
10078 fputc ('\n', asm_out_file);
10080 /* expand the line info table if necessary */
10081 if (separate_line_info_table_in_use
10082 == separate_line_info_table_allocated)
10084 separate_line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
10085 separate_line_info_table
10086 = (dw_separate_line_info_ref)
10087 xrealloc (separate_line_info_table,
10088 separate_line_info_table_allocated
10089 * sizeof (dw_separate_line_info_entry));
10092 /* Add the new entry at the end of the line_info_table. */
10094 = &separate_line_info_table[separate_line_info_table_in_use++];
10095 line_info->dw_file_num = lookup_filename (filename);
10096 line_info->dw_line_num = line;
10097 line_info->function = current_funcdef_number;
10101 register dw_line_info_ref line_info;
10103 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, LINE_CODE_LABEL,
10104 line_info_table_in_use);
10105 if (flag_debug_asm)
10106 fprintf (asm_out_file, "\t%s line %d", ASM_COMMENT_START, line);
10107 fputc ('\n', asm_out_file);
10109 /* Expand the line info table if necessary. */
10110 if (line_info_table_in_use == line_info_table_allocated)
10112 line_info_table_allocated += LINE_INFO_TABLE_INCREMENT;
10114 = (dw_line_info_ref)
10115 xrealloc (line_info_table,
10116 (line_info_table_allocated
10117 * sizeof (dw_line_info_entry)));
10120 /* Add the new entry at the end of the line_info_table. */
10121 line_info = &line_info_table[line_info_table_in_use++];
10122 line_info->dw_file_num = lookup_filename (filename);
10123 line_info->dw_line_num = line;
10128 /* Record the beginning of a new source file, for later output
10129 of the .debug_macinfo section. At present, unimplemented. */
10132 dwarf2out_start_source_file (filename)
10133 register const char *filename ATTRIBUTE_UNUSED;
10137 /* Record the end of a source file, for later output
10138 of the .debug_macinfo section. At present, unimplemented. */
10141 dwarf2out_end_source_file ()
10145 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10146 the tail part of the directive line, i.e. the part which is past the
10147 initial whitespace, #, whitespace, directive-name, whitespace part. */
10150 dwarf2out_define (lineno, buffer)
10151 register unsigned lineno ATTRIBUTE_UNUSED;
10152 register const char *buffer ATTRIBUTE_UNUSED;
10154 static int initialized = 0;
10157 dwarf2out_start_source_file (primary_filename);
10162 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
10163 the tail part of the directive line, i.e. the part which is past the
10164 initial whitespace, #, whitespace, directive-name, whitespace part. */
10167 dwarf2out_undef (lineno, buffer)
10168 register unsigned lineno ATTRIBUTE_UNUSED;
10169 register const char *buffer ATTRIBUTE_UNUSED;
10173 /* Set up for Dwarf output at the start of compilation. */
10176 dwarf2out_init (asm_out_file, main_input_filename)
10177 register FILE *asm_out_file;
10178 register const char *main_input_filename;
10180 /* Remember the name of the primary input file. */
10181 primary_filename = main_input_filename;
10183 /* Allocate the initial hunk of the file_table. */
10184 file_table = (char **) xcalloc (FILE_TABLE_INCREMENT, sizeof (char *));
10185 file_table_allocated = FILE_TABLE_INCREMENT;
10187 /* Skip the first entry - file numbers begin at 1. */
10188 file_table_in_use = 1;
10190 /* Allocate the initial hunk of the decl_die_table. */
10192 = (dw_die_ref *) xcalloc (DECL_DIE_TABLE_INCREMENT, sizeof (dw_die_ref));
10193 decl_die_table_allocated = DECL_DIE_TABLE_INCREMENT;
10194 decl_die_table_in_use = 0;
10196 /* Allocate the initial hunk of the decl_scope_table. */
10198 = (tree *) xcalloc (DECL_SCOPE_TABLE_INCREMENT, sizeof (tree));
10199 decl_scope_table_allocated = DECL_SCOPE_TABLE_INCREMENT;
10200 decl_scope_depth = 0;
10202 /* Allocate the initial hunk of the abbrev_die_table. */
10204 = (dw_die_ref *) xcalloc (ABBREV_DIE_TABLE_INCREMENT,
10205 sizeof (dw_die_ref));
10206 abbrev_die_table_allocated = ABBREV_DIE_TABLE_INCREMENT;
10207 /* Zero-th entry is allocated, but unused */
10208 abbrev_die_table_in_use = 1;
10210 /* Allocate the initial hunk of the line_info_table. */
10212 = (dw_line_info_ref) xcalloc (LINE_INFO_TABLE_INCREMENT,
10213 sizeof (dw_line_info_entry));
10214 line_info_table_allocated = LINE_INFO_TABLE_INCREMENT;
10215 /* Zero-th entry is allocated, but unused */
10216 line_info_table_in_use = 1;
10218 /* Generate the initial DIE for the .debug section. Note that the (string)
10219 value given in the DW_AT_name attribute of the DW_TAG_compile_unit DIE
10220 will (typically) be a relative pathname and that this pathname should be
10221 taken as being relative to the directory from which the compiler was
10222 invoked when the given (base) source file was compiled. */
10223 comp_unit_die = gen_compile_unit_die (main_input_filename);
10227 VARRAY_RTX_INIT (used_rtx_varray, 32, "used_rtx_varray");
10228 ggc_add_rtx_varray_root (&used_rtx_varray, 1);
10231 ASM_GENERATE_INTERNAL_LABEL (text_end_label, TEXT_END_LABEL, 0);
10232 ASM_GENERATE_INTERNAL_LABEL (abbrev_section_label, ABBREV_SECTION_LABEL, 0);
10233 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10234 ASM_GENERATE_INTERNAL_LABEL (text_section_label, TEXT_SECTION_LABEL, 0);
10236 strcpy (text_section_label, stripattributes (TEXT_SECTION));
10237 ASM_GENERATE_INTERNAL_LABEL (debug_info_section_label,
10238 DEBUG_INFO_SECTION_LABEL, 0);
10239 ASM_GENERATE_INTERNAL_LABEL (debug_line_section_label,
10240 DEBUG_LINE_SECTION_LABEL, 0);
10242 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10243 ASM_OUTPUT_LABEL (asm_out_file, abbrev_section_label);
10244 if (DWARF2_GENERATE_TEXT_SECTION_LABEL)
10246 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10247 ASM_OUTPUT_LABEL (asm_out_file, text_section_label);
10249 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10250 ASM_OUTPUT_LABEL (asm_out_file, debug_info_section_label);
10251 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10252 ASM_OUTPUT_LABEL (asm_out_file, debug_line_section_label);
10255 /* Output stuff that dwarf requires at the end of every file,
10256 and generate the DWARF-2 debugging info. */
10259 dwarf2out_finish ()
10261 limbo_die_node *node, *next_node;
10264 /* Traverse the limbo die list, and add parent/child links. The only
10265 dies without parents that should be here are concrete instances of
10266 inline functions, and the comp_unit_die. We can ignore the comp_unit_die.
10267 For concrete instances, we can get the parent die from the abstract
10269 for (node = limbo_die_list; node; node = next_node)
10271 next_node = node->next;
10274 if (die->die_parent == NULL)
10276 dw_die_ref origin = get_AT_ref (die, DW_AT_abstract_origin);
10278 add_child_die (origin->die_parent, die);
10279 else if (die == comp_unit_die)
10286 limbo_die_list = NULL;
10288 /* Walk through the list of incomplete types again, trying once more to
10289 emit full debugging info for them. */
10290 retry_incomplete_types ();
10292 /* Traverse the DIE's, reverse their lists of attributes and children,
10293 and add add sibling attributes to those DIE's that have children. */
10294 add_sibling_attributes (comp_unit_die);
10296 /* Output a terminator label for the .text section. */
10297 fputc ('\n', asm_out_file);
10298 ASM_OUTPUT_SECTION (asm_out_file, TEXT_SECTION);
10299 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, TEXT_END_LABEL, 0);
10302 /* Output a terminator label for the .data section. */
10303 fputc ('\n', asm_out_file);
10304 ASM_OUTPUT_SECTION (asm_out_file, DATA_SECTION);
10305 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, DATA_END_LABEL, 0);
10307 /* Output a terminator label for the .bss section. */
10308 fputc ('\n', asm_out_file);
10309 ASM_OUTPUT_SECTION (asm_out_file, BSS_SECTION);
10310 ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, BSS_END_LABEL, 0);
10313 /* Output the source line correspondence table. */
10314 if (line_info_table_in_use > 1 || separate_line_info_table_in_use)
10316 if (! DWARF2_ASM_LINE_DEBUG_INFO)
10318 fputc ('\n', asm_out_file);
10319 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_LINE_SECTION);
10320 output_line_info ();
10323 /* We can only use the low/high_pc attributes if all of the code
10325 if (separate_line_info_table_in_use == 0)
10327 add_AT_lbl_id (comp_unit_die, DW_AT_low_pc, text_section_label);
10328 add_AT_lbl_id (comp_unit_die, DW_AT_high_pc, text_end_label);
10331 add_AT_lbl_offset (comp_unit_die, DW_AT_stmt_list,
10332 debug_line_section_label);
10335 #if 0 /* unimplemented */
10336 if (debug_info_level >= DINFO_LEVEL_VERBOSE && primary)
10337 add_AT_unsigned (die, DW_AT_macro_info, 0);
10340 /* Output the abbreviation table. */
10341 fputc ('\n', asm_out_file);
10342 ASM_OUTPUT_SECTION (asm_out_file, ABBREV_SECTION);
10343 build_abbrev_table (comp_unit_die);
10344 output_abbrev_section ();
10346 /* Initialize the beginning DIE offset - and calculate sizes/offsets. */
10347 next_die_offset = DWARF_COMPILE_UNIT_HEADER_SIZE;
10348 calc_die_sizes (comp_unit_die);
10350 /* Output debugging information. */
10351 fputc ('\n', asm_out_file);
10352 ASM_OUTPUT_SECTION (asm_out_file, DEBUG_INFO_SECTION);
10353 output_compilation_unit_header ();
10354 output_die (comp_unit_die);
10356 if (pubname_table_in_use)
10358 /* Output public names table. */
10359 fputc ('\n', asm_out_file);
10360 ASM_OUTPUT_SECTION (asm_out_file, PUBNAMES_SECTION);
10361 output_pubnames ();
10364 /* We only put functions in the arange table, so don't write it out if
10365 we don't have any. */
10366 if (fde_table_in_use)
10368 /* Output the address range information. */
10369 fputc ('\n', asm_out_file);
10370 ASM_OUTPUT_SECTION (asm_out_file, ARANGES_SECTION);
10374 #endif /* DWARF2_DEBUGGING_INFO */