1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007
4 Free Software Foundation, Inc.
5 Derived from coffread.c, dbxread.c, and a lot of hacking.
6 Contributed by IBM Corporation.
8 This file is part of GDB.
10 This program 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 of the License, or
13 (at your option) any later version.
15 This program 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 this program; if not, write to the Free Software
22 Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 Boston, MA 02110-1301, USA. */
28 #include <sys/types.h>
31 #include "gdb_string.h"
33 #include <sys/param.h>
34 #ifdef HAVE_SYS_FILE_H
39 #include "coff/internal.h"
40 #include "libcoff.h" /* FIXME, internal data from BFD */
41 #include "coff/xcoff.h"
43 #include "coff/rs6000.h"
47 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
51 #include "stabsread.h"
52 #include "expression.h"
53 #include "complaints.h"
55 #include "gdb-stabs.h"
57 /* For interface with stabsread.c. */
58 #include "aout/stab_gnu.h"
61 /* We put a pointer to this structure in the read_symtab_private field
67 /* First symbol number for this file. */
71 /* Number of symbols in the section of the symbol table devoted to
72 this file's symbols (actually, the section bracketed may contain
73 more than just this file's symbols). If numsyms is 0, the only
74 reason for this thing's existence is the dependency list. Nothing
75 else will happen when it is read in. */
79 /* Position of the start of the line number information for this psymtab. */
80 unsigned int lineno_off
;
83 /* Remember what we deduced to be the source language of this psymtab. */
85 static enum language psymtab_language
= language_unknown
;
88 /* Simplified internal version of coff symbol table information */
93 int c_symnum
; /* symbol number of this entry */
94 int c_naux
; /* 0 if syment only, 1 if syment + auxent */
96 unsigned char c_sclass
;
101 /* last function's saved coff symbol `cs' */
103 static struct coff_symbol fcn_cs_saved
;
105 static bfd
*symfile_bfd
;
107 /* Core address of start and end of text of current source file.
108 This is calculated from the first function seen after a C_FILE
112 static CORE_ADDR cur_src_end_addr
;
114 /* Core address of the end of the first object file. */
116 static CORE_ADDR first_object_file_end
;
118 /* initial symbol-table-debug-string vector length */
120 #define INITIAL_STABVECTOR_LENGTH 40
122 /* Nonzero if within a function (so symbols should be local,
123 if nothing says specifically). */
127 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
128 there is any reason not to just use a #define, but might as well
129 ask BFD for the size and store it here, I guess. */
131 static unsigned local_symesz
;
133 struct coff_symfile_info
135 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
136 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
138 /* Pointer to the string table. */
141 /* Pointer to debug section. */
144 /* Pointer to the a.out symbol table. */
147 /* Number of symbols in symtbl. */
150 /* Offset in data section to TOC anchor. */
151 CORE_ADDR toc_offset
;
155 bf_notfound_complaint (void)
157 complaint (&symfile_complaints
, _("line numbers off, `.bf' symbol not found"));
161 ef_complaint (int arg1
)
163 complaint (&symfile_complaints
,
164 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
168 eb_complaint (int arg1
)
170 complaint (&symfile_complaints
,
171 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
174 static void xcoff_initial_scan (struct objfile
*, int);
176 static void scan_xcoff_symtab (struct objfile
*);
178 static char *xcoff_next_symbol_text (struct objfile
*);
180 static void record_include_begin (struct coff_symbol
*);
183 enter_line_range (struct subfile
*, unsigned, unsigned,
184 CORE_ADDR
, CORE_ADDR
, unsigned *);
186 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
188 static void xcoff_symfile_init (struct objfile
*);
190 static void xcoff_new_init (struct objfile
*);
192 static void xcoff_symfile_finish (struct objfile
*);
194 static void xcoff_symfile_offsets (struct objfile
*,
195 struct section_addr_info
*addrs
);
197 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
199 static void read_symbol (struct internal_syment
*, int);
201 static int read_symbol_lineno (int);
203 static CORE_ADDR
read_symbol_nvalue (int);
205 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
208 static void read_xcoff_symtab (struct partial_symtab
*);
211 static void add_stab_to_list (char *, struct pending_stabs
**);
214 static int compare_lte (const void *, const void *);
216 static struct linetable
*arrange_linetable (struct linetable
*);
218 static void record_include_end (struct coff_symbol
*);
220 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
223 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
225 static int secnum_to_section (int, struct objfile
*);
226 static asection
*secnum_to_bfd_section (int, struct objfile
*);
228 struct find_targ_sec_arg
233 struct objfile
*objfile
;
236 static void find_targ_sec (bfd
*, asection
*, void *);
239 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
241 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
242 struct objfile
*objfile
= args
->objfile
;
243 if (sect
->target_index
== args
->targ_index
)
245 /* This is the section. Figure out what SECT_OFF_* code it is. */
246 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
247 *args
->resultp
= SECT_OFF_TEXT (objfile
);
248 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
249 *args
->resultp
= SECT_OFF_DATA (objfile
);
251 *args
->resultp
= sect
->index
;
252 *args
->bfd_sect
= sect
;
256 /* Return the section number (SECT_OFF_*) that CS points to. */
258 secnum_to_section (int secnum
, struct objfile
*objfile
)
260 int off
= SECT_OFF_TEXT (objfile
);
261 asection
*sect
= NULL
;
262 struct find_targ_sec_arg args
;
263 args
.targ_index
= secnum
;
265 args
.bfd_sect
= §
;
266 args
.objfile
= objfile
;
267 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
271 /* Return the BFD section that CS points to. */
273 secnum_to_bfd_section (int secnum
, struct objfile
*objfile
)
275 int off
= SECT_OFF_TEXT (objfile
);
276 asection
*sect
= NULL
;
277 struct find_targ_sec_arg args
;
278 args
.targ_index
= secnum
;
280 args
.bfd_sect
= §
;
281 args
.objfile
= objfile
;
282 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
286 /* add a given stab string into given stab vector. */
291 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
293 if (*stabvector
== NULL
)
295 *stabvector
= (struct pending_stabs
*)
296 xmalloc (sizeof (struct pending_stabs
) +
297 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
298 (*stabvector
)->count
= 0;
299 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
301 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
303 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
304 *stabvector
= (struct pending_stabs
*)
305 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
306 (*stabvector
)->length
* sizeof (char *));
308 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
313 /* Linenos are processed on a file-by-file basis.
317 1) xlc (IBM's native c compiler) postpones static function code
318 emission to the end of a compilation unit. This way it can
319 determine if those functions (statics) are needed or not, and
320 can do some garbage collection (I think). This makes line
321 numbers and corresponding addresses unordered, and we end up
322 with a line table like:
339 and that breaks gdb's binary search on line numbers, if the
340 above table is not sorted on line numbers. And that sort
341 should be on function based, since gcc can emit line numbers
344 10 0x100 - for the init/test part of a for stmt.
347 10 0x400 - for the increment part of a for stmt.
349 arrange_linetable() will do this sorting.
351 2) aix symbol table might look like:
353 c_file // beginning of a new file
354 .bi // beginning of include file
355 .ei // end of include file
359 basically, .bi/.ei pairs do not necessarily encapsulate
360 their scope. They need to be recorded, and processed later
361 on when we come the end of the compilation unit.
362 Include table (inclTable) and process_linenos() handle
368 /* compare line table entry addresses. */
371 compare_lte (const void *lte1p
, const void *lte2p
)
373 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
374 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
375 return lte1
->pc
- lte2
->pc
;
378 /* Given a line table with function entries are marked, arrange its functions
379 in ascending order and strip off function entry markers and return it in
380 a newly created table. If the old one is good enough, return the old one. */
381 /* FIXME: I think all this stuff can be replaced by just passing
382 sort_linevec = 1 to end_symtab. */
384 static struct linetable
*
385 arrange_linetable (struct linetable
*oldLineTb
)
387 int ii
, jj
, newline
, /* new line count */
388 function_count
; /* # of functions */
390 struct linetable_entry
*fentry
; /* function entry vector */
391 int fentry_size
; /* # of function entries */
392 struct linetable
*newLineTb
; /* new line table */
394 #define NUM_OF_FUNCTIONS 20
396 fentry_size
= NUM_OF_FUNCTIONS
;
397 fentry
= (struct linetable_entry
*)
398 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
400 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
403 if (oldLineTb
->item
[ii
].line
== 0)
404 { /* function entry found. */
406 if (function_count
>= fentry_size
)
407 { /* make sure you have room. */
409 fentry
= (struct linetable_entry
*)
410 xrealloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
412 fentry
[function_count
].line
= ii
;
413 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
418 if (function_count
== 0)
423 else if (function_count
> 1)
424 qsort (fentry
, function_count
, sizeof (struct linetable_entry
), compare_lte
);
426 /* allocate a new line table. */
427 newLineTb
= (struct linetable
*)
429 (sizeof (struct linetable
) +
430 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
432 /* if line table does not start with a function beginning, copy up until
436 if (oldLineTb
->item
[0].line
!= 0)
438 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
439 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
441 /* Now copy function lines one by one. */
443 for (ii
= 0; ii
< function_count
; ++ii
)
445 for (jj
= fentry
[ii
].line
+ 1;
446 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
448 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
451 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
455 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
456 following `IncludeChain'. At the end of each symtab (end_symtab),
457 we will determine if we should create additional symtab's to
458 represent if (the include files. */
461 typedef struct _inclTable
463 char *name
; /* include filename */
465 /* Offsets to the line table. end points to the last entry which is
466 part of this include file. */
469 struct subfile
*subfile
;
470 unsigned funStartLine
; /* start line # of its function */
474 #define INITIAL_INCLUDE_TABLE_LENGTH 20
475 static InclTable
*inclTable
; /* global include table */
476 static int inclIndx
; /* last entry to table */
477 static int inclLength
; /* table length */
478 static int inclDepth
; /* nested include depth */
480 static void allocate_include_entry (void);
483 record_include_begin (struct coff_symbol
*cs
)
487 /* In xcoff, we assume include files cannot be nested (not in .c files
488 of course, but in corresponding .s files.). */
490 /* This can happen with old versions of GCC.
491 GCC 2.3.3-930426 does not exhibit this on a test case which
492 a user said produced the message for him. */
493 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
497 allocate_include_entry ();
499 inclTable
[inclIndx
].name
= cs
->c_name
;
500 inclTable
[inclIndx
].begin
= cs
->c_value
;
504 record_include_end (struct coff_symbol
*cs
)
510 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
513 allocate_include_entry ();
515 pTbl
= &inclTable
[inclIndx
];
516 pTbl
->end
= cs
->c_value
;
523 allocate_include_entry (void)
525 if (inclTable
== NULL
)
527 inclTable
= (InclTable
*)
528 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
530 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
531 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
534 else if (inclIndx
>= inclLength
)
536 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
537 inclTable
= (InclTable
*)
538 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
539 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
540 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
544 /* Global variable to pass the psymtab down to all the routines involved
545 in psymtab to symtab processing. */
546 static struct partial_symtab
*this_symtab_psymtab
;
548 /* given the start and end addresses of a compilation unit (or a csect,
549 at times) process its lines and create appropriate line vectors. */
552 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
555 file_ptr max_offset
=
556 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->deprecated_sym_private
)
559 /* subfile structure for the main compilation unit. */
560 struct subfile main_subfile
;
562 /* In the main source file, any time we see a function entry, we
563 reset this variable to function's absolute starting line number.
564 All the following line numbers in the function are relative to
565 this, and we record absolute line numbers in record_line(). */
567 unsigned int main_source_baseline
= 0;
572 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
574 goto return_after_cleanup
;
576 memset (&main_subfile
, '\0', sizeof (main_subfile
));
579 /* All source lines were in the main source file. None in include files. */
581 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
582 &main_source_baseline
);
586 /* There was source with line numbers in include files. */
589 coff_data (this_symtab_psymtab
->objfile
->obfd
)->local_linesz
;
590 main_source_baseline
= 0;
592 for (ii
= 0; ii
< inclIndx
; ++ii
)
594 struct subfile
*tmpSubfile
;
596 /* If there is main file source before include file, enter it. */
597 if (offset
< inclTable
[ii
].begin
)
600 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
601 start
, 0, &main_source_baseline
);
604 /* Have a new subfile for the include file. */
606 tmpSubfile
= inclTable
[ii
].subfile
=
607 (struct subfile
*) xmalloc (sizeof (struct subfile
));
609 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
610 firstLine
= &(inclTable
[ii
].funStartLine
);
612 /* Enter include file's lines now. */
613 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
614 inclTable
[ii
].end
, start
, 0, firstLine
);
616 if (offset
<= inclTable
[ii
].end
)
617 offset
= inclTable
[ii
].end
+ linesz
;
620 /* All the include files' line have been processed at this point. Now,
621 enter remaining lines of the main file, if any left. */
622 if (offset
< max_offset
+ 1 - linesz
)
624 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
625 &main_source_baseline
);
629 /* Process main file's line numbers. */
630 if (main_subfile
.line_vector
)
632 struct linetable
*lineTb
, *lv
;
634 lv
= main_subfile
.line_vector
;
636 /* Line numbers are not necessarily ordered. xlc compilation will
637 put static function to the end. */
639 lineTb
= arrange_linetable (lv
);
642 current_subfile
->line_vector
= (struct linetable
*)
643 xrealloc (lv
, (sizeof (struct linetable
)
644 + lv
->nitems
* sizeof (struct linetable_entry
)));
649 current_subfile
->line_vector
= lineTb
;
652 current_subfile
->line_vector_length
=
653 current_subfile
->line_vector
->nitems
;
656 /* Now, process included files' line numbers. */
658 for (ii
= 0; ii
< inclIndx
; ++ii
)
660 if ((inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!! FIXMEmgo */
662 struct linetable
*lineTb
, *lv
;
664 lv
= (inclTable
[ii
].subfile
)->line_vector
;
666 /* Line numbers are not necessarily ordered. xlc compilation will
667 put static function to the end. */
669 lineTb
= arrange_linetable (lv
);
673 /* For the same include file, we might want to have more than one
674 subfile. This happens if we have something like:
682 while foo.h including code in it. (stupid but possible)
683 Since start_subfile() looks at the name and uses an
684 existing one if finds, we need to provide a fake name and
688 start_subfile (inclTable
[ii
].name
, (char *) 0);
691 /* Pick a fake name that will produce the same results as this
692 one when passed to deduce_language_from_filename. Kludge on
694 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
695 if (fakename
== NULL
)
697 start_subfile (fakename
, (char *) 0);
698 xfree (current_subfile
->name
);
700 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
705 current_subfile
->line_vector
=
706 (struct linetable
*) xrealloc
707 (lv
, (sizeof (struct linetable
)
708 + lv
->nitems
* sizeof (struct linetable_entry
)));
714 current_subfile
->line_vector
= lineTb
;
717 current_subfile
->line_vector_length
=
718 current_subfile
->line_vector
->nitems
;
719 start_subfile (pop_subfile (), (char *) 0);
723 return_after_cleanup
:
725 /* We don't want to keep alloc/free'ing the global include file table. */
728 /* Start with a fresh subfile structure for the next file. */
729 memset (&main_subfile
, '\0', sizeof (struct subfile
));
733 aix_process_linenos (void)
735 /* process line numbers and enter them into line vector */
736 process_linenos (last_source_start_addr
, cur_src_end_addr
);
740 /* Enter a given range of lines into the line vector.
741 can be called in the following two ways:
742 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
743 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
745 endoffset points to the last line table entry that we should pay
749 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
, unsigned endoffset
, /* offsets to line table */
750 CORE_ADDR startaddr
, /* offsets to line table */
751 CORE_ADDR endaddr
, unsigned *firstLine
)
753 unsigned int curoffset
;
756 struct internal_lineno int_lnno
;
757 unsigned int limit_offset
;
761 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
763 curoffset
= beginoffset
;
765 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->deprecated_sym_private
)
770 if (endoffset
>= limit_offset
)
772 complaint (&symfile_complaints
,
773 _("Bad line table offset in C_EINCL directive"));
776 limit_offset
= endoffset
;
781 abfd
= this_symtab_psymtab
->objfile
->obfd
;
782 linesz
= coff_data (abfd
)->local_linesz
;
783 ext_lnno
= alloca (linesz
);
785 while (curoffset
<= limit_offset
)
787 bfd_seek (abfd
, curoffset
, SEEK_SET
);
788 bfd_bread (ext_lnno
, linesz
, abfd
);
789 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
791 /* Find the address this line represents. */
792 addr
= (int_lnno
.l_lnno
793 ? int_lnno
.l_addr
.l_paddr
794 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
795 addr
+= ANOFFSET (this_symtab_psymtab
->objfile
->section_offsets
,
796 SECT_OFF_TEXT (this_symtab_psymtab
->objfile
));
798 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
801 if (int_lnno
.l_lnno
== 0)
803 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
804 record_line (subfile
, 0, addr
);
808 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
, addr
);
814 /* Save the vital information for use when closing off the current file.
815 NAME is the file name the symbols came from, START_ADDR is the first
816 text address for the file, and SIZE is the number of bytes of text. */
818 #define complete_symtab(name, start_addr) { \
819 last_source_file = savestring (name, strlen (name)); \
820 last_source_start_addr = start_addr; \
824 /* Refill the symbol table input buffer
825 and set the variables that control fetching entries from it.
826 Reports an error if no data available.
827 This function can read past the end of the symbol table
828 (into the string table) but this does no harm. */
830 /* Reading symbol table has to be fast! Keep the followings as macros, rather
833 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
837 if (namestr[0] == '.') ++namestr; \
838 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
839 (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \
840 misc_func_recorded = 1; \
844 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
845 nested. At any given time, a symbol can only be in one static block.
846 This is the base address of current static block, zero if non exists. */
848 static int static_block_base
= 0;
850 /* Section number for the current static block. */
852 static int static_block_section
= -1;
854 /* true if space for symbol name has been allocated. */
856 static int symname_alloced
= 0;
858 /* Next symbol to read. Pointer into raw seething symbol table. */
860 static char *raw_symbol
;
862 /* This is the function which stabsread.c calls to get symbol
866 xcoff_next_symbol_text (struct objfile
*objfile
)
868 struct internal_syment symbol
;
870 /* FIXME: is this the same as the passed arg? */
871 if (this_symtab_psymtab
)
872 objfile
= this_symtab_psymtab
->objfile
;
874 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
877 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
879 /* Return something which points to '\0' and hope the symbol reading
880 code does something reasonable. */
883 else if (symbol
.n_sclass
& 0x80)
886 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
889 coff_data (objfile
->obfd
)->local_symesz
;
894 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
896 /* Return something which points to '\0' and hope the symbol reading
897 code does something reasonable. */
903 /* Read symbols for a given partial symbol table. */
906 read_xcoff_symtab (struct partial_symtab
*pst
)
908 struct objfile
*objfile
= pst
->objfile
;
909 bfd
*abfd
= objfile
->obfd
;
910 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
911 char *strtbl
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
;
913 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
;
914 char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
916 struct internal_syment symbol
[1];
917 union internal_auxent main_aux
;
918 struct coff_symbol cs
[1];
919 CORE_ADDR file_start_addr
= 0;
920 CORE_ADDR file_end_addr
= 0;
922 int next_file_symnum
= -1;
923 unsigned int max_symnum
;
924 int just_started
= 1;
926 int fcn_start_addr
= 0;
928 struct coff_symbol fcn_stab_saved
= { 0 };
930 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
931 union internal_auxent fcn_aux_saved
;
932 struct context_stack
*new;
934 char *filestring
= " _start_ "; /* Name of the current file. */
936 char *last_csect_name
; /* last seen csect's name and value */
937 CORE_ADDR last_csect_val
;
940 this_symtab_psymtab
= pst
;
942 /* Get the appropriate COFF "constants" related to the file we're
944 local_symesz
= coff_data (abfd
)->local_symesz
;
946 last_source_file
= NULL
;
951 start_symtab (filestring
, (char *) NULL
, file_start_addr
);
952 record_debugformat (debugfmt
);
953 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
955 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
956 first_object_file_end
= 0;
959 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
960 + symnum
* local_symesz
;
962 while (symnum
< max_symnum
)
965 QUIT
; /* make this command interruptable. */
967 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
968 /* read one symbol into `cs' structure. After processing the
969 whole symbol table, only string table will be kept in memory,
970 symbol table and debug section of xcoff will be freed. Thus
971 we can mark symbols with names in string table as
976 /* Swap and align the symbol into a reasonable C structure. */
977 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
979 cs
->c_symnum
= symnum
;
980 cs
->c_naux
= symbol
->n_numaux
;
981 if (symbol
->n_zeroes
)
984 /* We must use the original, unswapped, name here so the name field
985 pointed to by cs->c_name will persist throughout xcoffread. If
986 we use the new field, it gets overwritten for each symbol. */
987 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
988 /* If it's exactly E_SYMNMLEN characters long it isn't
990 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
993 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
994 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
995 p
[E_SYMNMLEN
] = '\0';
1000 else if (symbol
->n_sclass
& 0x80)
1002 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1003 symname_alloced
= 0;
1007 /* in string table */
1008 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1009 symname_alloced
= 1;
1011 cs
->c_value
= symbol
->n_value
;
1012 cs
->c_sclass
= symbol
->n_sclass
;
1013 cs
->c_secnum
= symbol
->n_scnum
;
1014 cs
->c_type
= (unsigned) symbol
->n_type
;
1016 raw_symbol
+= local_symesz
;
1019 /* Save addr of first aux entry. */
1020 raw_auxptr
= raw_symbol
;
1022 /* Skip all the auxents associated with this symbol. */
1023 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1025 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1030 /* if symbol name starts with ".$" or "$", ignore it. */
1031 if (cs
->c_name
[0] == '$'
1032 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1035 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1037 if (last_source_file
)
1040 end_symtab (cur_src_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1045 start_symtab ("_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1046 record_debugformat (debugfmt
);
1047 cur_src_end_addr
= first_object_file_end
;
1048 /* done with all files, everything from here on is globals */
1051 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1054 /* Dealing with a symbol with a csect entry. */
1056 #define CSECT(PP) ((PP)->x_csect)
1057 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1058 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1059 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1060 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1062 /* Convert the auxent to something we can access. */
1063 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1064 0, cs
->c_naux
, &main_aux
);
1066 switch (CSECT_SMTYP (&main_aux
))
1070 /* Ignore all external references. */
1074 /* A section description. */
1076 switch (CSECT_SCLAS (&main_aux
))
1082 /* A program csect is seen. We have to allocate one
1083 symbol table for each program csect. Normally gdb
1084 prefers one symtab for each source file. In case
1085 of AIX, one source file might include more than one
1086 [PR] csect, and they don't have to be adjacent in
1087 terms of the space they occupy in memory. Thus, one
1088 single source file might get fragmented in the
1089 memory and gdb's file start and end address
1090 approach does not work! GCC (and I think xlc) seem
1091 to put all the code in the unnamed program csect. */
1093 if (last_csect_name
)
1095 complete_symtab (filestring
, file_start_addr
);
1096 cur_src_end_addr
= file_end_addr
;
1097 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1100 /* Give all csects for this source file the same
1102 start_symtab (filestring
, NULL
, (CORE_ADDR
) 0);
1103 record_debugformat (debugfmt
);
1106 /* If this is the very first csect seen,
1107 basically `__start'. */
1110 first_object_file_end
1111 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1116 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1117 SECT_OFF_TEXT (objfile
));
1118 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1120 if (cs
->c_name
&& (cs
->c_name
[0] == '.'
1121 || cs
->c_name
[0] == '@'))
1123 last_csect_name
= cs
->c_name
;
1124 last_csect_val
= cs
->c_value
;
1125 last_csect_sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1130 /* All other symbols are put into the minimal symbol
1143 /* Ignore the symbol. */
1151 switch (CSECT_SCLAS (&main_aux
))
1154 /* a function entry point. */
1155 function_entry_point
:
1157 fcn_start_addr
= cs
->c_value
;
1159 /* save the function header info, which will be used
1160 when `.bf' is seen. */
1162 fcn_aux_saved
= main_aux
;
1166 /* shared library function trampoline code entry point. */
1170 /* The symbols often have the same names as debug symbols for
1171 functions, and confuse lookup_symbol. */
1175 /* xlc puts each variable in a separate csect, so we get
1176 an XTY_SD for each variable. But gcc puts several
1177 variables in a csect, so that each variable only gets
1178 an XTY_LD. This will typically be XMC_RW; I suspect
1179 XMC_RO and XMC_BS might be possible too.
1180 These variables are put in the minimal symbol table
1187 /* Common symbols are put into the minimal symbol table only. */
1195 /* If explicitly specified as a function, treat is as one. This check
1196 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1197 after the above CSECT check. */
1198 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1200 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1201 0, cs
->c_naux
, &main_aux
);
1202 goto function_entry_point
;
1205 switch (cs
->c_sclass
)
1210 /* c_value field contains symnum of next .file entry in table
1211 or symnum of first global after last .file. */
1213 next_file_symnum
= cs
->c_value
;
1215 /* Complete symbol table for last object file containing
1216 debugging information. */
1218 /* Whether or not there was a csect in the previous file, we
1219 have to call `end_stabs' and `start_stabs' to reset
1220 type_vector, line_vector, etc. structures. */
1222 complete_symtab (filestring
, file_start_addr
);
1223 cur_src_end_addr
= file_end_addr
;
1224 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1227 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1228 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1229 standard COFF way and put it in the auxent. We use the auxent if
1230 the symbol is ".file" and an auxent exists, otherwise use the symbol
1231 itself. Simple enough. */
1232 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1234 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1235 0, cs
->c_naux
, &main_aux
);
1236 filestring
= coff_getfilename (&main_aux
, objfile
);
1239 filestring
= cs
->c_name
;
1242 start_symtab (filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1243 record_debugformat (debugfmt
);
1244 last_csect_name
= 0;
1246 /* reset file start and end addresses. A compilation unit with no text
1247 (only data) should have zero file boundaries. */
1248 file_start_addr
= file_end_addr
= 0;
1252 fcn_stab_saved
= *cs
;
1256 if (DEPRECATED_STREQ (cs
->c_name
, ".bf"))
1258 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1259 SECT_OFF_TEXT (objfile
));
1260 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1261 0, cs
->c_naux
, &main_aux
);
1263 within_function
= 1;
1265 new = push_context (0, fcn_start_addr
+ off
);
1267 new->name
= define_symbol
1268 (fcn_cs_saved
.c_value
+ off
,
1269 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1270 if (new->name
!= NULL
)
1271 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT (objfile
);
1273 else if (DEPRECATED_STREQ (cs
->c_name
, ".ef"))
1276 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1277 0, cs
->c_naux
, &main_aux
);
1279 /* The value of .ef is the address of epilogue code;
1280 not useful for gdb. */
1281 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1282 contains number of lines to '}' */
1284 if (context_stack_depth
<= 0)
1285 { /* We attempted to pop an empty context stack */
1286 ef_complaint (cs
->c_symnum
);
1287 within_function
= 0;
1290 new = pop_context ();
1291 /* Stack must be empty now. */
1292 if (context_stack_depth
> 0 || new == NULL
)
1294 ef_complaint (cs
->c_symnum
);
1295 within_function
= 0;
1299 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1301 (fcn_cs_saved
.c_value
1302 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1303 + ANOFFSET (objfile
->section_offsets
,
1304 SECT_OFF_TEXT (objfile
))),
1306 within_function
= 0;
1311 /* Begin static block. */
1313 struct internal_syment symbol
;
1315 read_symbol (&symbol
, cs
->c_value
);
1316 static_block_base
= symbol
.n_value
;
1317 static_block_section
=
1318 secnum_to_section (symbol
.n_scnum
, objfile
);
1323 /* End of static block. */
1324 static_block_base
= 0;
1325 static_block_section
= -1;
1336 complaint (&symfile_complaints
, _("Unrecognized storage class %d."),
1351 /* beginning of include file */
1352 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1353 order. Thus, when wee see them, we might not know enough info
1354 to process them. Thus, we'll be saving them into a table
1355 (inclTable) and postpone their processing. */
1357 record_include_begin (cs
);
1361 /* End of include file. */
1362 /* See the comment after case C_BINCL. */
1363 record_include_end (cs
);
1367 if (DEPRECATED_STREQ (cs
->c_name
, ".bb"))
1370 new = push_context (depth
,
1372 + ANOFFSET (objfile
->section_offsets
,
1373 SECT_OFF_TEXT (objfile
))));
1375 else if (DEPRECATED_STREQ (cs
->c_name
, ".eb"))
1377 if (context_stack_depth
<= 0)
1378 { /* We attempted to pop an empty context stack */
1379 eb_complaint (cs
->c_symnum
);
1382 new = pop_context ();
1383 if (depth
-- != new->depth
)
1385 eb_complaint (cs
->c_symnum
);
1388 if (local_symbols
&& context_stack_depth
> 0)
1390 /* Make a block for the local symbols within. */
1391 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1394 + ANOFFSET (objfile
->section_offsets
,
1395 SECT_OFF_TEXT (objfile
))),
1398 local_symbols
= new->locals
;
1403 process_xcoff_symbol (cs
, objfile
);
1408 if (last_source_file
)
1412 complete_symtab (filestring
, file_start_addr
);
1413 cur_src_end_addr
= file_end_addr
;
1414 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1415 /* When reading symbols for the last C_FILE of the objfile, try
1416 to make sure that we set pst->symtab to the symtab for the
1417 file, not to the _globals_ symtab. I'm not sure whether this
1418 actually works right or when/if it comes up. */
1419 if (pst
->symtab
== NULL
)
1425 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1426 (SYMBOL2) = (struct symbol *) \
1427 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1428 *(SYMBOL2) = *(SYMBOL1);
1431 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1432 (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->objfile_obstack);
1435 /* process one xcoff symbol. */
1437 static struct symbol
*
1438 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1440 struct symbol onesymbol
;
1441 struct symbol
*sym
= &onesymbol
;
1442 struct symbol
*sym2
= NULL
;
1448 if (cs
->c_secnum
< 0)
1450 /* The value is a register number, offset within a frame, etc.,
1451 and does not get relocated. */
1457 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1458 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1465 memset (sym
, '\0', sizeof (struct symbol
));
1467 /* default assumptions */
1468 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1469 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1470 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1472 if (ISFCN (cs
->c_type
))
1474 /* At this point, we don't know the type of the function. This
1475 will be patched with the type from its stab entry later on in
1476 patch_block_stabs (), unless the file was compiled without -g. */
1478 DEPRECATED_SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1479 SYMBOL_TYPE (sym
) = builtin_type (current_gdbarch
)->nodebug_text_symbol
;
1481 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1482 SYMBOL_DUP (sym
, sym2
);
1484 if (cs
->c_sclass
== C_EXT
)
1485 add_symbol_to_list (sym2
, &global_symbols
);
1486 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1487 add_symbol_to_list (sym2
, &file_symbols
);
1491 /* In case we can't figure out the type, provide default. */
1492 SYMBOL_TYPE (sym
) = builtin_type (current_gdbarch
)->nodebug_data_symbol
;
1494 switch (cs
->c_sclass
)
1497 /* The values of functions and global symbols are now resolved
1498 via the global_sym_chain in stabsread.c. */
1500 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1501 add_stab_to_list (name
, &global_stabs
);
1503 add_stab_to_list (name
, &file_stabs
);
1507 add_stab_to_list (name
, &global_stabs
);
1512 common_block_start (cs
->c_name
, objfile
);
1516 common_block_end (objfile
);
1520 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1533 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1536 SYMBOL_SECTION (sym
) = sec
;
1543 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1544 all statics and we need to distinguish file-scope versus
1545 function-scope using within_function. We do this by
1546 changing the string we pass to define_symbol to use 'S'
1547 where we need to, which is not necessarily super-clean,
1548 but seems workable enough. */
1550 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1554 if (*pp
== 'V' && !within_function
)
1556 sym
= define_symbol ((cs
->c_value
1557 + ANOFFSET (objfile
->section_offsets
,
1558 static_block_section
)),
1559 cs
->c_name
, 0, 0, objfile
);
1562 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1563 SYMBOL_SECTION (sym
) = static_block_section
;
1572 /* Extract the file name from the aux entry of a C_FILE symbol.
1573 Result is in static storage and is only good for temporary use. */
1576 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1578 static char buffer
[BUFSIZ
];
1580 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1582 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
1583 + aux_entry
->x_file
.x_n
.x_offset
);
1586 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1587 buffer
[FILNMLEN
] = '\0';
1592 /* Set *SYMBOL to symbol number symno in symtbl. */
1594 read_symbol (struct internal_syment
*symbol
, int symno
)
1597 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->deprecated_sym_private
)->symtbl_num_syms
;
1599 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->deprecated_sym_private
)->symtbl
;
1600 if (symno
< 0 || symno
>= nsyms
)
1602 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1603 symbol
->n_value
= 0;
1604 symbol
->n_scnum
= -1;
1607 bfd_coff_swap_sym_in (this_symtab_psymtab
->objfile
->obfd
,
1608 stbl
+ (symno
* local_symesz
),
1612 /* Get value corresponding to symbol number symno in symtbl. */
1615 read_symbol_nvalue (int symno
)
1617 struct internal_syment symbol
[1];
1619 read_symbol (symbol
, symno
);
1620 return symbol
->n_value
;
1624 /* Find the address of the function corresponding to symno, where
1625 symno is the symbol pointed to by the linetable. */
1628 read_symbol_lineno (int symno
)
1630 struct objfile
*objfile
= this_symtab_psymtab
->objfile
;
1631 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1633 struct coff_symfile_info
*info
=
1634 (struct coff_symfile_info
*)objfile
->deprecated_sym_private
;
1635 int nsyms
= info
->symtbl_num_syms
;
1636 char *stbl
= info
->symtbl
;
1637 char *strtbl
= info
->strtbl
;
1639 struct internal_syment symbol
[1];
1640 union internal_auxent main_aux
[1];
1644 bf_notfound_complaint ();
1648 /* Note that just searching for a short distance (e.g. 50 symbols)
1649 is not enough, at least in the following case.
1652 [many .stabx entries]
1653 [a few functions, referring to foo]
1657 What happens here is that the assembler moves the .stabx entries
1658 to right before the ".bf" for foo, but the symbol for "foo" is before
1659 all the stabx entries. See PR gdb/2222. */
1661 /* Maintaining a table of .bf entries might be preferable to this search.
1662 If I understand things correctly it would need to be done only for
1663 the duration of a single psymtab to symtab conversion. */
1664 while (symno
< nsyms
)
1666 bfd_coff_swap_sym_in (symfile_bfd
,
1667 stbl
+ (symno
* local_symesz
), symbol
);
1668 if (symbol
->n_sclass
== C_FCN
)
1670 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1671 if (DEPRECATED_STREQ (name
, ".bf"))
1674 symno
+= symbol
->n_numaux
+ 1;
1677 bf_notfound_complaint ();
1681 /* take aux entry and return its lineno */
1683 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1684 symbol
->n_type
, symbol
->n_sclass
,
1685 0, symbol
->n_numaux
, main_aux
);
1687 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1690 /* Support for line number handling */
1692 /* This function is called for every section; it finds the outer limits
1693 * of the line table (minimum and maximum file offset) so that the
1694 * mainline code can read the whole thing for efficiency.
1697 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1699 struct coff_symfile_info
*info
;
1701 file_ptr offset
, maxoff
;
1703 count
= asect
->lineno_count
;
1705 if (!DEPRECATED_STREQ (asect
->name
, ".text") || count
== 0)
1708 size
= count
* coff_data (abfd
)->local_linesz
;
1709 info
= (struct coff_symfile_info
*) vpinfo
;
1710 offset
= asect
->line_filepos
;
1711 maxoff
= offset
+ size
;
1713 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1714 info
->min_lineno_offset
= offset
;
1716 if (maxoff
> info
->max_lineno_offset
)
1717 info
->max_lineno_offset
= maxoff
;
1720 static void xcoff_psymtab_to_symtab_1 (struct partial_symtab
*);
1723 xcoff_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
1725 struct cleanup
*old_chain
;
1734 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1739 /* Read in all partial symtabs on which this one is dependent */
1740 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1741 if (!pst
->dependencies
[i
]->readin
)
1743 /* Inform about additional files that need to be read in. */
1746 fputs_filtered (" ", gdb_stdout
);
1748 fputs_filtered ("and ", gdb_stdout
);
1750 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1751 wrap_here (""); /* Flush output */
1752 gdb_flush (gdb_stdout
);
1754 xcoff_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1757 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1759 /* Init stuff necessary for reading in symbols. */
1762 old_chain
= make_cleanup (really_free_pendings
, 0);
1764 read_xcoff_symtab (pst
);
1766 do_cleanups (old_chain
);
1772 static void xcoff_psymtab_to_symtab (struct partial_symtab
*);
1774 /* Read in all of the symbols for a given psymtab for real.
1775 Be verbose about it if the user wants that. */
1778 xcoff_psymtab_to_symtab (struct partial_symtab
*pst
)
1788 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1793 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0
1794 || pst
->number_of_dependencies
)
1796 /* Print the message now, before reading the string table,
1797 to avoid disconcerting pauses. */
1800 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1801 gdb_flush (gdb_stdout
);
1804 sym_bfd
= pst
->objfile
->obfd
;
1806 next_symbol_text_func
= xcoff_next_symbol_text
;
1808 xcoff_psymtab_to_symtab_1 (pst
);
1810 /* Match with global symbols. This only needs to be done once,
1811 after all of the symtabs and dependencies have been read in. */
1812 scan_file_globals (pst
->objfile
);
1814 /* Finish up the debug error message. */
1816 printf_filtered ("done.\n");
1821 xcoff_new_init (struct objfile
*objfile
)
1823 stabsread_new_init ();
1824 buildsym_new_init ();
1827 /* Do initialization in preparation for reading symbols from OBJFILE.
1829 We will only be called if this is an XCOFF or XCOFF-like file.
1830 BFD handles figuring out the format of the file, and code in symfile.c
1831 uses BFD's determination to vector to us. */
1834 xcoff_symfile_init (struct objfile
*objfile
)
1836 /* Allocate struct to keep track of the symfile */
1837 objfile
->deprecated_sym_private
= xmalloc (sizeof (struct coff_symfile_info
));
1839 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1840 find this causes a significant slowdown in gdb then we could
1841 set it in the debug symbol readers only when necessary. */
1842 objfile
->flags
|= OBJF_REORDERED
;
1844 init_entry_point_info (objfile
);
1847 /* Perform any local cleanups required when we are done with a particular
1848 objfile. I.E, we are in the process of discarding all symbol information
1849 for an objfile, freeing up all memory held for it, and unlinking the
1850 objfile struct from the global list of known objfiles. */
1853 xcoff_symfile_finish (struct objfile
*objfile
)
1855 if (objfile
->deprecated_sym_private
!= NULL
)
1857 xfree (objfile
->deprecated_sym_private
);
1860 /* Start with a fresh include table for the next objfile. */
1866 inclIndx
= inclLength
= inclDepth
= 0;
1871 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1875 unsigned char lengthbuf
[4];
1878 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
= NULL
;
1880 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1881 error (_("cannot seek to string table in %s: %s"),
1882 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1884 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1885 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1887 /* If no string table is needed, then the file may end immediately
1888 after the symbols. Just return with `strtbl' set to NULL. */
1890 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1893 /* Allocate string table from objfile_obstack. We will need this table
1894 as long as we have its symbol table around. */
1896 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1897 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
= strtbl
;
1899 /* Copy length buffer, the first byte is usually zero and is
1900 used for stabs with a name length of zero. */
1901 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1902 if (length
== sizeof lengthbuf
)
1905 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1907 if (val
!= length
- sizeof lengthbuf
)
1908 error (_("cannot read string table from %s: %s"),
1909 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1910 if (strtbl
[length
- 1] != '\0')
1911 error (_("bad symbol file: string table does not end with null character"));
1916 /* If we have not yet seen a function for this psymtab, this is 0. If we
1917 have seen one, it is the offset in the line numbers of the line numbers
1919 static unsigned int first_fun_line_offset
;
1921 static struct partial_symtab
*xcoff_start_psymtab
1922 (struct objfile
*, char *, int,
1923 struct partial_symbol
**, struct partial_symbol
**);
1925 /* Allocate and partially fill a partial symtab. It will be
1926 completely filled at the end of the symbol list.
1928 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1929 is the address relative to which its symbols are (incremental) or 0
1932 static struct partial_symtab
*
1933 xcoff_start_psymtab (struct objfile
*objfile
, char *filename
, int first_symnum
,
1934 struct partial_symbol
**global_syms
,
1935 struct partial_symbol
**static_syms
)
1937 struct partial_symtab
*result
=
1938 start_psymtab_common (objfile
, objfile
->section_offsets
,
1940 /* We fill in textlow later. */
1942 global_syms
, static_syms
);
1944 result
->read_symtab_private
= (char *)
1945 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
1946 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1947 result
->read_symtab
= xcoff_psymtab_to_symtab
;
1949 /* Deduce the source language from the filename for this psymtab. */
1950 psymtab_language
= deduce_language_from_filename (filename
);
1955 static struct partial_symtab
*xcoff_end_psymtab
1956 (struct partial_symtab
*, char **, int, int,
1957 struct partial_symtab
**, int, int);
1959 /* Close off the current usage of PST.
1960 Returns PST, or NULL if the partial symtab was empty and thrown away.
1962 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1964 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1965 are the information for includes and dependencies. */
1967 static struct partial_symtab
*
1968 xcoff_end_psymtab (struct partial_symtab
*pst
, char **include_list
,
1969 int num_includes
, int capping_symbol_number
,
1970 struct partial_symtab
**dependency_list
,
1971 int number_dependencies
, int textlow_not_set
)
1974 struct objfile
*objfile
= pst
->objfile
;
1976 if (capping_symbol_number
!= -1)
1977 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
1978 capping_symbol_number
1979 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1980 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
1981 first_fun_line_offset
;
1982 first_fun_line_offset
= 0;
1983 pst
->n_global_syms
=
1984 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1985 pst
->n_static_syms
=
1986 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1988 pst
->number_of_dependencies
= number_dependencies
;
1989 if (number_dependencies
)
1991 pst
->dependencies
= (struct partial_symtab
**)
1992 obstack_alloc (&objfile
->objfile_obstack
,
1993 number_dependencies
* sizeof (struct partial_symtab
*));
1994 memcpy (pst
->dependencies
, dependency_list
,
1995 number_dependencies
* sizeof (struct partial_symtab
*));
1998 pst
->dependencies
= 0;
2000 for (i
= 0; i
< num_includes
; i
++)
2002 struct partial_symtab
*subpst
=
2003 allocate_psymtab (include_list
[i
], objfile
);
2005 subpst
->section_offsets
= pst
->section_offsets
;
2006 subpst
->read_symtab_private
=
2007 (char *) obstack_alloc (&objfile
->objfile_obstack
,
2008 sizeof (struct symloc
));
2009 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2010 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2011 subpst
->textlow
= 0;
2012 subpst
->texthigh
= 0;
2014 /* We could save slight bits of space by only making one of these,
2015 shared by the entire set of include files. FIXME-someday. */
2016 subpst
->dependencies
= (struct partial_symtab
**)
2017 obstack_alloc (&objfile
->objfile_obstack
,
2018 sizeof (struct partial_symtab
*));
2019 subpst
->dependencies
[0] = pst
;
2020 subpst
->number_of_dependencies
= 1;
2022 subpst
->globals_offset
=
2023 subpst
->n_global_syms
=
2024 subpst
->statics_offset
=
2025 subpst
->n_static_syms
= 0;
2029 subpst
->read_symtab
= pst
->read_symtab
;
2032 sort_pst_symbols (pst
);
2034 /* If there is already a psymtab or symtab for a file of this name,
2035 remove it. (If there is a symtab, more drastic things also
2036 happen.) This happens in VxWorks. */
2037 free_named_symtabs (pst
->filename
);
2039 if (num_includes
== 0
2040 && number_dependencies
== 0
2041 && pst
->n_global_syms
== 0
2042 && pst
->n_static_syms
== 0)
2044 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2045 it is on the obstack, but we can forget to chain it on the list. */
2046 /* Empty psymtabs happen as a result of header files which don't have
2047 any symbols in them. There can be a lot of them. */
2049 discard_psymtab (pst
);
2051 /* Indicate that psymtab was thrown away. */
2052 pst
= (struct partial_symtab
*) NULL
;
2057 static void swap_sym (struct internal_syment
*,
2058 union internal_auxent
*, char **, char **,
2059 unsigned int *, struct objfile
*);
2061 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2062 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2063 the symbol and its auxents. */
2066 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2067 char **name
, char **raw
, unsigned int *symnump
,
2068 struct objfile
*objfile
)
2070 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2071 if (symbol
->n_zeroes
)
2073 /* If it's exactly E_SYMNMLEN characters long it isn't
2075 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2077 /* FIXME: wastes memory for symbols which we don't end up putting
2078 into the minimal symbols. */
2080 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
2081 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2082 p
[E_SYMNMLEN
] = '\0';
2086 /* Point to the unswapped name as that persists as long as the
2088 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2090 else if (symbol
->n_sclass
& 0x80)
2092 *name
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
2097 *name
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
2101 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2102 if (symbol
->n_numaux
> 0)
2104 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2105 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2107 *symnump
+= symbol
->n_numaux
;
2108 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2113 function_outside_compilation_unit_complaint (const char *arg1
)
2115 complaint (&symfile_complaints
,
2116 _("function `%s' appears to be defined outside of all compilation units"),
2121 scan_xcoff_symtab (struct objfile
*objfile
)
2123 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2124 char *filestring
= NULL
;
2127 int past_first_source_file
= 0;
2132 /* Current partial symtab */
2133 struct partial_symtab
*pst
;
2135 /* List of current psymtab's include files */
2136 char **psymtab_include_list
;
2137 int includes_allocated
;
2140 /* Index within current psymtab dependency list */
2141 struct partial_symtab
**dependency_list
;
2142 int dependencies_used
, dependencies_allocated
;
2145 struct internal_syment symbol
;
2146 union internal_auxent main_aux
[5];
2147 unsigned int ssymnum
;
2149 char *last_csect_name
= NULL
; /* last seen csect's name and value */
2150 CORE_ADDR last_csect_val
= 0;
2151 int last_csect_sec
= 0;
2152 int misc_func_recorded
= 0; /* true if any misc. function */
2153 int textlow_not_set
= 1;
2155 pst
= (struct partial_symtab
*) 0;
2157 includes_allocated
= 30;
2159 psymtab_include_list
= (char **) alloca (includes_allocated
*
2162 dependencies_allocated
= 30;
2163 dependencies_used
= 0;
2165 (struct partial_symtab
**) alloca (dependencies_allocated
*
2166 sizeof (struct partial_symtab
*));
2168 last_source_file
= NULL
;
2170 abfd
= objfile
->obfd
;
2171 next_symbol_text_func
= xcoff_next_symbol_text
;
2173 sraw_symbol
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
;
2174 nsyms
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl_num_syms
;
2176 while (ssymnum
< nsyms
)
2182 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2183 sclass
= symbol
.n_sclass
;
2190 /* The CSECT auxent--always the last auxent. */
2191 union internal_auxent csect_aux
;
2192 unsigned int symnum_before
= ssymnum
;
2194 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2196 if (symbol
.n_numaux
> 1)
2198 bfd_coff_swap_aux_in
2200 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2203 symbol
.n_numaux
- 1,
2208 csect_aux
= main_aux
[0];
2210 /* If symbol name starts with ".$" or "$", ignore it. */
2211 if (namestring
[0] == '$'
2212 || (namestring
[0] == '.' && namestring
[1] == '$'))
2215 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2218 switch (csect_aux
.x_csect
.x_smclas
)
2221 if (last_csect_name
)
2223 /* If no misc. function recorded in the last
2224 seen csect, enter it as a function. This
2225 will take care of functions like strcmp()
2228 if (!misc_func_recorded
)
2230 RECORD_MINIMAL_SYMBOL
2231 (last_csect_name
, last_csect_val
,
2232 mst_text
, last_csect_sec
,
2238 /* We have to allocate one psymtab for
2239 each program csect, because their text
2240 sections need not be adjacent. */
2242 (pst
, psymtab_include_list
, includes_used
,
2243 symnum_before
, dependency_list
,
2244 dependencies_used
, textlow_not_set
);
2246 dependencies_used
= 0;
2247 /* Give all psymtabs for this source file the same
2249 pst
= xcoff_start_psymtab
2253 objfile
->global_psymbols
.next
,
2254 objfile
->static_psymbols
.next
);
2257 /* Activate the misc_func_recorded mechanism for
2258 compiler- and linker-generated CSECTs like ".strcmp"
2260 if (namestring
&& (namestring
[0] == '.'
2261 || namestring
[0] == '@'))
2263 last_csect_name
= namestring
;
2264 last_csect_val
= symbol
.n_value
;
2266 secnum_to_section (symbol
.n_scnum
, objfile
);
2271 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2272 if (highval
> pst
->texthigh
)
2273 pst
->texthigh
= highval
;
2274 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2275 pst
->textlow
= symbol
.n_value
;
2277 misc_func_recorded
= 0;
2282 /* Data variables are recorded in the minimal symbol
2283 table, except for section symbols. */
2284 if (*namestring
!= '.')
2285 prim_record_minimal_symbol_and_info
2286 (namestring
, symbol
.n_value
,
2287 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2288 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2294 warning (_("More than one XMC_TC0 symbol found."));
2295 toc_offset
= symbol
.n_value
;
2297 /* Make TOC offset relative to start address of section. */
2298 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2300 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2304 /* These symbols tell us where the TOC entry for a
2305 variable is, not the variable itself. */
2314 switch (csect_aux
.x_csect
.x_smclas
)
2317 /* A function entry point. */
2319 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2320 first_fun_line_offset
=
2321 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2322 RECORD_MINIMAL_SYMBOL
2323 (namestring
, symbol
.n_value
,
2324 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2325 secnum_to_section (symbol
.n_scnum
, objfile
),
2330 /* shared library function trampoline code entry
2333 /* record trampoline code entries as
2334 mst_solib_trampoline symbol. When we lookup mst
2335 symbols, we will choose mst_text over
2336 mst_solib_trampoline. */
2337 RECORD_MINIMAL_SYMBOL
2338 (namestring
, symbol
.n_value
,
2339 mst_solib_trampoline
,
2340 secnum_to_section (symbol
.n_scnum
, objfile
),
2345 /* The symbols often have the same names as
2346 debug symbols for functions, and confuse
2352 /* xlc puts each variable in a separate csect,
2353 so we get an XTY_SD for each variable. But
2354 gcc puts several variables in a csect, so
2355 that each variable only gets an XTY_LD. We
2356 still need to record them. This will
2357 typically be XMC_RW; I suspect XMC_RO and
2358 XMC_BS might be possible too. */
2359 if (*namestring
!= '.')
2360 prim_record_minimal_symbol_and_info
2361 (namestring
, symbol
.n_value
,
2362 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2363 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2370 switch (csect_aux
.x_csect
.x_smclas
)
2374 /* Common variables are recorded in the minimal symbol
2375 table, except for section symbols. */
2376 if (*namestring
!= '.')
2377 prim_record_minimal_symbol_and_info
2378 (namestring
, symbol
.n_value
,
2379 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2380 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2393 unsigned int symnum_before
;
2395 symnum_before
= ssymnum
;
2396 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2399 /* See if the last csect needs to be recorded. */
2401 if (last_csect_name
&& !misc_func_recorded
)
2404 /* If no misc. function recorded in the last seen csect, enter
2405 it as a function. This will take care of functions like
2406 strcmp() compiled by xlc. */
2408 RECORD_MINIMAL_SYMBOL
2409 (last_csect_name
, last_csect_val
,
2410 mst_text
, last_csect_sec
, objfile
);
2415 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2416 symnum_before
, dependency_list
,
2417 dependencies_used
, textlow_not_set
);
2419 dependencies_used
= 0;
2421 first_fun_line_offset
= 0;
2423 /* XCOFF, according to the AIX 3.2 documentation, puts the
2424 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2425 do things the standard COFF way and put it in the auxent.
2426 We use the auxent if the symbol is ".file" and an auxent
2427 exists, otherwise use the symbol itself. */
2428 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2430 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2433 filestring
= namestring
;
2435 pst
= xcoff_start_psymtab (objfile
,
2438 objfile
->global_psymbols
.next
,
2439 objfile
->static_psymbols
.next
);
2440 last_csect_name
= NULL
;
2446 complaint (&symfile_complaints
,
2447 _("Storage class %d not recognized during scan"), sclass
);
2451 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2452 to handle only the C_FUN and C_EXT. */
2467 /* C_EINCL means we are switching back to the main file. But there
2468 is no reason to care; the only thing we want to know about
2469 includes is the names of all the included (.h) files. */
2474 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2478 /* I don't think the name of the common block (as opposed to the
2479 variables within it) is something which is user visible
2487 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2488 so C_LSYM would appear to be only for locals. */
2494 /* We probably could save a few instructions by assuming that
2495 C_LSYM, C_PSYM, etc., never have auxents. */
2496 int naux1
= symbol
.n_numaux
+ 1;
2498 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2504 /* Mark down an include file in the current psymtab */
2505 enum language tmp_language
;
2506 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2509 tmp_language
= deduce_language_from_filename (namestring
);
2511 /* Only change the psymtab's language if we've learned
2512 something useful (eg. tmp_language is not language_unknown).
2513 In addition, to match what start_subfile does, never change
2515 if (tmp_language
!= language_unknown
2516 && (tmp_language
!= language_c
2517 || psymtab_language
!= language_cplus
))
2518 psymtab_language
= tmp_language
;
2520 /* In C++, one may expect the same filename to come round many
2521 times, when code is coming alternately from the main file
2522 and from inline functions in other files. So I check to see
2523 if this is a file we've seen before -- either the main
2524 source file, or a previously included file.
2526 This seems to be a lot of time to be spending on N_SOL, but
2527 things like "break c-exp.y:435" need to work (I
2528 suppose the psymtab_include_list could be hashed or put
2529 in a binary tree, if profiling shows this is a major hog). */
2530 if (pst
&& DEPRECATED_STREQ (namestring
, pst
->filename
))
2534 for (i
= 0; i
< includes_used
; i
++)
2535 if (DEPRECATED_STREQ (namestring
, psymtab_include_list
[i
]))
2543 psymtab_include_list
[includes_used
++] = namestring
;
2544 if (includes_used
>= includes_allocated
)
2546 char **orig
= psymtab_include_list
;
2548 psymtab_include_list
= (char **)
2549 alloca ((includes_allocated
*= 2) *
2551 memcpy (psymtab_include_list
, orig
,
2552 includes_used
* sizeof (char *));
2557 /* The value of the C_FUN is not the address of the function (it
2558 appears to be the address before linking), but as long as it
2559 is smaller than the actual address, then find_pc_partial_function
2560 will use the minimal symbols instead. I hope. */
2568 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2571 p
= (char *) strchr (namestring
, ':');
2573 continue; /* Not a debugging symbol. */
2575 /* Main processing section for debugging symbols which
2576 the initial read through the symbol tables needs to worry
2577 about. If we reach this point, the symbol which we are
2578 considering is definitely one we are interested in.
2579 p must also contain the (valid) index into the namestring
2580 which indicates the debugging type symbol. */
2585 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
2586 #ifdef STATIC_TRANSFORM_NAME
2587 namestring
= STATIC_TRANSFORM_NAME (namestring
);
2589 add_psymbol_to_list (namestring
, p
- namestring
,
2590 VAR_DOMAIN
, LOC_STATIC
,
2591 &objfile
->static_psymbols
,
2593 psymtab_language
, objfile
);
2597 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
2598 /* The addresses in these entries are reported to be
2599 wrong. See the code that reads 'G's for symtabs. */
2600 add_psymbol_to_list (namestring
, p
- namestring
,
2601 VAR_DOMAIN
, LOC_STATIC
,
2602 &objfile
->global_psymbols
,
2604 psymtab_language
, objfile
);
2608 /* When a 'T' entry is defining an anonymous enum, it
2609 may have a name which is the empty string, or a
2610 single space. Since they're not really defining a
2611 symbol, those shouldn't go in the partial symbol
2612 table. We do pick up the elements of such enums at
2613 'check_enum:', below. */
2614 if (p
>= namestring
+ 2
2615 || (p
== namestring
+ 1
2616 && namestring
[0] != ' '))
2618 add_psymbol_to_list (namestring
, p
- namestring
,
2619 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2620 &objfile
->static_psymbols
,
2622 psymtab_language
, objfile
);
2625 /* Also a typedef with the same name. */
2626 add_psymbol_to_list (namestring
, p
- namestring
,
2627 VAR_DOMAIN
, LOC_TYPEDEF
,
2628 &objfile
->static_psymbols
,
2630 psymtab_language
, objfile
);
2637 if (p
!= namestring
) /* a name is there, not just :T... */
2639 add_psymbol_to_list (namestring
, p
- namestring
,
2640 VAR_DOMAIN
, LOC_TYPEDEF
,
2641 &objfile
->static_psymbols
,
2643 psymtab_language
, objfile
);
2646 /* If this is an enumerated type, we need to
2647 add all the enum constants to the partial symbol
2648 table. This does not cover enums without names, e.g.
2649 "enum {a, b} c;" in C, but fortunately those are
2650 rare. There is no way for GDB to find those from the
2651 enum type without spending too much time on it. Thus
2652 to solve this problem, the compiler needs to put out the
2653 enum in a nameless type. GCC2 does this. */
2655 /* We are looking for something of the form
2656 <name> ":" ("t" | "T") [<number> "="] "e"
2657 {<constant> ":" <value> ","} ";". */
2659 /* Skip over the colon and the 't' or 'T'. */
2661 /* This type may be given a number. Also, numbers can come
2662 in pairs like (0,26). Skip over it. */
2663 while ((*p
>= '0' && *p
<= '9')
2664 || *p
== '(' || *p
== ',' || *p
== ')'
2670 /* The aix4 compiler emits extra crud before the members. */
2673 /* Skip over the type (?). */
2677 /* Skip over the colon. */
2681 /* We have found an enumerated type. */
2682 /* According to comments in read_enum_type
2683 a comma could end it instead of a semicolon.
2684 I don't know where that happens.
2686 while (*p
&& *p
!= ';' && *p
!= ',')
2690 /* Check for and handle cretinous dbx symbol name
2692 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2693 p
= next_symbol_text (objfile
);
2695 /* Point to the character after the name
2696 of the enum constant. */
2697 for (q
= p
; *q
&& *q
!= ':'; q
++)
2699 /* Note that the value doesn't matter for
2700 enum constants in psymtabs, just in symtabs. */
2701 add_psymbol_to_list (p
, q
- p
,
2702 VAR_DOMAIN
, LOC_CONST
,
2703 &objfile
->static_psymbols
, 0,
2704 0, psymtab_language
, objfile
);
2705 /* Point past the name. */
2707 /* Skip over the value. */
2708 while (*p
&& *p
!= ',')
2710 /* Advance past the comma. */
2718 /* Constant, e.g. from "const" in Pascal. */
2719 add_psymbol_to_list (namestring
, p
- namestring
,
2720 VAR_DOMAIN
, LOC_CONST
,
2721 &objfile
->static_psymbols
, symbol
.n_value
,
2722 0, psymtab_language
, objfile
);
2728 int name_len
= p
- namestring
;
2729 char *name
= xmalloc (name_len
+ 1);
2730 memcpy (name
, namestring
, name_len
);
2731 name
[name_len
] = '\0';
2732 function_outside_compilation_unit_complaint (name
);
2735 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2736 add_psymbol_to_list (namestring
, p
- namestring
,
2737 VAR_DOMAIN
, LOC_BLOCK
,
2738 &objfile
->static_psymbols
,
2740 psymtab_language
, objfile
);
2743 /* Global functions were ignored here, but now they
2744 are put into the global psymtab like one would expect.
2745 They're also in the minimal symbol table. */
2749 int name_len
= p
- namestring
;
2750 char *name
= xmalloc (name_len
+ 1);
2751 memcpy (name
, namestring
, name_len
);
2752 name
[name_len
] = '\0';
2753 function_outside_compilation_unit_complaint (name
);
2756 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2757 add_psymbol_to_list (namestring
, p
- namestring
,
2758 VAR_DOMAIN
, LOC_BLOCK
,
2759 &objfile
->global_psymbols
,
2761 psymtab_language
, objfile
);
2764 /* Two things show up here (hopefully); static symbols of
2765 local scope (static used inside braces) or extensions
2766 of structure symbols. We can ignore both. */
2780 case '#': /* for symbol identification (used in live ranges) */
2784 /* It is a C++ nested symbol. We don't need to record it
2785 (I don't think); if we try to look up foo::bar::baz,
2786 then symbols for the symtab containing foo should get
2787 read in, I think. */
2788 /* Someone says sun cc puts out symbols like
2789 /foo/baz/maclib::/usr/local/bin/maclib,
2790 which would get here with a symbol type of ':'. */
2794 /* Unexpected symbol descriptor. The second and subsequent stabs
2795 of a continued stab can show up here. The question is
2796 whether they ever can mimic a normal stab--it would be
2797 nice if not, since we certainly don't want to spend the
2798 time searching to the end of every string looking for
2801 complaint (&symfile_complaints
,
2802 _("unknown symbol descriptor `%c'"), p
[1]);
2804 /* Ignore it; perhaps it is an extension that we don't
2814 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2815 ssymnum
, dependency_list
,
2816 dependencies_used
, textlow_not_set
);
2819 /* Record the toc offset value of this symbol table into objfile structure.
2820 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2821 this information would be file auxiliary header. */
2823 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->toc_offset
= toc_offset
;
2826 /* Return the toc offset value for a given objfile. */
2829 get_toc_offset (struct objfile
*objfile
)
2832 return ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->toc_offset
;
2836 /* Scan and build partial symbols for a symbol file.
2837 We have been initialized by a call to dbx_symfile_init, which
2838 put all the relevant info into a "struct dbx_symfile_info",
2839 hung off the objfile structure.
2841 SECTION_OFFSETS contains offsets relative to which the symbols in the
2842 various sections are (depending where the sections were actually loaded).
2843 MAINLINE is true if we are reading the main symbol
2844 table (as opposed to a shared lib or dynamically loaded file). */
2847 xcoff_initial_scan (struct objfile
*objfile
, int mainline
)
2851 struct cleanup
*back_to
;
2852 int num_symbols
; /* # of symbols */
2853 file_ptr symtab_offset
; /* symbol table and */
2854 file_ptr stringtab_offset
; /* string table file offsets */
2855 struct coff_symfile_info
*info
;
2859 info
= (struct coff_symfile_info
*) objfile
->deprecated_sym_private
;
2860 symfile_bfd
= abfd
= objfile
->obfd
;
2861 name
= objfile
->name
;
2863 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2864 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2865 stringtab_offset
= symtab_offset
+
2866 num_symbols
* coff_data (abfd
)->local_symesz
;
2868 info
->min_lineno_offset
= 0;
2869 info
->max_lineno_offset
= 0;
2870 bfd_map_over_sections (abfd
, find_linenos
, info
);
2872 if (num_symbols
> 0)
2874 /* Read the string table. */
2875 init_stringtab (abfd
, stringtab_offset
, objfile
);
2877 /* Read the .debug section, if present. */
2879 struct bfd_section
*secp
;
2880 bfd_size_type length
;
2881 char *debugsec
= NULL
;
2883 secp
= bfd_get_section_by_name (abfd
, ".debug");
2886 length
= bfd_section_size (abfd
, secp
);
2890 (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
2892 if (!bfd_get_section_contents (abfd
, secp
, debugsec
,
2893 (file_ptr
) 0, length
))
2895 error (_("Error reading .debug section of `%s': %s"),
2896 name
, bfd_errmsg (bfd_get_error ()));
2900 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
=
2905 /* Read the symbols. We keep them in core because we will want to
2906 access them randomly in read_symbol*. */
2907 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2909 error (_("Error reading symbols from %s: %s"),
2910 name
, bfd_errmsg (bfd_get_error ()));
2911 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2912 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
=
2913 obstack_alloc (&objfile
->objfile_obstack
, size
);
2914 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl_num_syms
=
2917 val
= bfd_bread (((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
,
2920 perror_with_name (_("reading symbol table"));
2922 /* If we are reinitializing, or if we have never loaded syms yet, init */
2924 || (objfile
->global_psymbols
.size
== 0
2925 && objfile
->static_psymbols
.size
== 0))
2926 /* I'm not sure how how good num_symbols is; the rule of thumb in
2927 init_psymbol_list was developed for a.out. On the one hand,
2928 num_symbols includes auxents. On the other hand, it doesn't
2930 init_psymbol_list (objfile
, num_symbols
);
2932 free_pending_blocks ();
2933 back_to
= make_cleanup (really_free_pendings
, 0);
2935 init_minimal_symbol_collection ();
2936 make_cleanup_discard_minimal_symbols ();
2938 /* Now that the symbol table data of the executable file are all in core,
2939 process them and define symbols accordingly. */
2941 scan_xcoff_symtab (objfile
);
2943 /* Install any minimal symbols that have been collected as the current
2944 minimal symbols for this objfile. */
2946 install_minimal_symbols (objfile
);
2948 do_cleanups (back_to
);
2952 xcoff_symfile_offsets (struct objfile
*objfile
, struct section_addr_info
*addrs
)
2954 asection
*sect
= NULL
;
2957 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
2958 objfile
->section_offsets
= (struct section_offsets
*)
2959 obstack_alloc (&objfile
->objfile_obstack
,
2960 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
2962 /* Initialize the section indexes for future use. */
2963 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
2965 objfile
->sect_index_text
= sect
->index
;
2967 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
2969 objfile
->sect_index_data
= sect
->index
;
2971 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
2973 objfile
->sect_index_bss
= sect
->index
;
2975 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
2977 objfile
->sect_index_rodata
= sect
->index
;
2979 for (i
= 0; i
< objfile
->num_sections
; ++i
)
2981 /* syms_from_objfile kindly subtracts from addr the
2982 bfd_section_vma of the .text section. This strikes me as
2983 wrong--whether the offset to be applied to symbol reading is
2984 relative to the start address of the section depends on the
2985 symbol format. In any event, this whole "addr" concept is
2986 pretty broken (it doesn't handle any section but .text
2987 sensibly), so just ignore the addr parameter and use 0.
2988 rs6000-nat.c will set the correct section offsets via
2989 objfile_relocate. */
2990 (objfile
->section_offsets
)->offsets
[i
] = 0;
2994 /* Register our ability to parse symbols for xcoff BFD files. */
2996 static struct sym_fns xcoff_sym_fns
=
2999 /* It is possible that coff and xcoff should be merged as
3000 they do have fundamental similarities (for example, the extra storage
3001 classes used for stabs could presumably be recognized in any COFF file).
3002 However, in addition to obvious things like all the csect hair, there are
3003 some subtler differences between xcoffread.c and coffread.c, notably
3004 the fact that coffread.c has no need to read in all the symbols, but
3005 xcoffread.c reads all the symbols and does in fact randomly access them
3006 (in C_BSTAT and line number processing). */
3008 bfd_target_xcoff_flavour
,
3010 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3011 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3012 xcoff_initial_scan
, /* sym_read: read a symbol file into symtab */
3013 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
3014 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
3015 default_symfile_segments
, /* sym_segments: Get segment information from
3017 NULL
/* next: pointer to next struct sym_fns */
3021 _initialize_xcoffread (void)
3023 add_symtab_fns (&xcoff_sym_fns
);