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, 2008, 2009
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 3 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, see <http://www.gnu.org/licenses/>. */
26 #include <sys/types.h>
29 #include "gdb_string.h"
31 #include <sys/param.h>
32 #ifdef HAVE_SYS_FILE_H
37 #include "coff/internal.h"
38 #include "libcoff.h" /* FIXME, internal data from BFD */
39 #include "coff/xcoff.h"
41 #include "coff/rs6000.h"
42 #include "xcoffread.h"
46 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
50 #include "stabsread.h"
51 #include "expression.h"
52 #include "complaints.h"
54 #include "gdb-stabs.h"
56 /* For interface with stabsread.c. */
57 #include "aout/stab_gnu.h"
60 /* We put a pointer to this structure in the read_symtab_private field
66 /* First symbol number for this file. */
70 /* Number of symbols in the section of the symbol table devoted to
71 this file's symbols (actually, the section bracketed may contain
72 more than just this file's symbols). If numsyms is 0, the only
73 reason for this thing's existence is the dependency list. Nothing
74 else will happen when it is read in. */
78 /* Position of the start of the line number information for this psymtab. */
79 unsigned int lineno_off
;
82 /* Remember what we deduced to be the source language of this psymtab. */
84 static enum language psymtab_language
= language_unknown
;
87 /* Simplified internal version of coff symbol table information */
92 int c_symnum
; /* symbol number of this entry */
93 int c_naux
; /* 0 if syment only, 1 if syment + auxent */
95 unsigned char c_sclass
;
100 /* last function's saved coff symbol `cs' */
102 static struct coff_symbol fcn_cs_saved
;
104 static bfd
*symfile_bfd
;
106 /* Core address of start and end of text of current source file.
107 This is calculated from the first function seen after a C_FILE
111 static CORE_ADDR cur_src_end_addr
;
113 /* Core address of the end of the first object file. */
115 static CORE_ADDR first_object_file_end
;
117 /* initial symbol-table-debug-string vector length */
119 #define INITIAL_STABVECTOR_LENGTH 40
121 /* Nonzero if within a function (so symbols should be local,
122 if nothing says specifically). */
126 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
127 there is any reason not to just use a #define, but might as well
128 ask BFD for the size and store it here, I guess. */
130 static unsigned local_symesz
;
132 struct coff_symfile_info
134 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
135 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
137 /* Pointer to the string table. */
140 /* Pointer to debug section. */
143 /* Pointer to the a.out symbol table. */
146 /* Number of symbols in symtbl. */
149 /* Offset in data section to TOC anchor. */
150 CORE_ADDR toc_offset
;
154 bf_notfound_complaint (void)
156 complaint (&symfile_complaints
, _("line numbers off, `.bf' symbol not found"));
160 ef_complaint (int arg1
)
162 complaint (&symfile_complaints
,
163 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
167 eb_complaint (int arg1
)
169 complaint (&symfile_complaints
,
170 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
173 static void xcoff_initial_scan (struct objfile
*, int);
175 static void scan_xcoff_symtab (struct objfile
*);
177 static char *xcoff_next_symbol_text (struct objfile
*);
179 static void record_include_begin (struct coff_symbol
*);
182 enter_line_range (struct subfile
*, unsigned, unsigned,
183 CORE_ADDR
, CORE_ADDR
, unsigned *);
185 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
187 static void xcoff_symfile_init (struct objfile
*);
189 static void xcoff_new_init (struct objfile
*);
191 static void xcoff_symfile_finish (struct objfile
*);
193 static void xcoff_symfile_offsets (struct objfile
*,
194 struct section_addr_info
*addrs
);
196 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
198 static void read_symbol (struct internal_syment
*, int);
200 static int read_symbol_lineno (int);
202 static CORE_ADDR
read_symbol_nvalue (int);
204 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
207 static void read_xcoff_symtab (struct partial_symtab
*);
210 static void add_stab_to_list (char *, struct pending_stabs
**);
213 static int compare_lte (const void *, const void *);
215 static struct linetable
*arrange_linetable (struct linetable
*);
217 static void record_include_end (struct coff_symbol
*);
219 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
222 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
224 static int secnum_to_section (int, struct objfile
*);
225 static asection
*secnum_to_bfd_section (int, struct objfile
*);
227 struct find_targ_sec_arg
232 struct objfile
*objfile
;
235 static void find_targ_sec (bfd
*, asection
*, void *);
238 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
240 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
241 struct objfile
*objfile
= args
->objfile
;
242 if (sect
->target_index
== args
->targ_index
)
244 /* This is the section. Figure out what SECT_OFF_* code it is. */
245 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
246 *args
->resultp
= SECT_OFF_TEXT (objfile
);
247 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
248 *args
->resultp
= SECT_OFF_DATA (objfile
);
250 *args
->resultp
= sect
->index
;
251 *args
->bfd_sect
= sect
;
255 /* Return the section number (SECT_OFF_*) that CS points to. */
257 secnum_to_section (int secnum
, struct objfile
*objfile
)
259 int off
= SECT_OFF_TEXT (objfile
);
260 asection
*sect
= NULL
;
261 struct find_targ_sec_arg args
;
262 args
.targ_index
= secnum
;
264 args
.bfd_sect
= §
;
265 args
.objfile
= objfile
;
266 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
270 /* Return the BFD section that CS points to. */
272 secnum_to_bfd_section (int secnum
, struct objfile
*objfile
)
274 int off
= SECT_OFF_TEXT (objfile
);
275 asection
*sect
= NULL
;
276 struct find_targ_sec_arg args
;
277 args
.targ_index
= secnum
;
279 args
.bfd_sect
= §
;
280 args
.objfile
= objfile
;
281 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
285 /* add a given stab string into given stab vector. */
290 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
292 if (*stabvector
== NULL
)
294 *stabvector
= (struct pending_stabs
*)
295 xmalloc (sizeof (struct pending_stabs
) +
296 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
297 (*stabvector
)->count
= 0;
298 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
300 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
302 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
303 *stabvector
= (struct pending_stabs
*)
304 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
305 (*stabvector
)->length
* sizeof (char *));
307 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
312 /* Linenos are processed on a file-by-file basis.
316 1) xlc (IBM's native c compiler) postpones static function code
317 emission to the end of a compilation unit. This way it can
318 determine if those functions (statics) are needed or not, and
319 can do some garbage collection (I think). This makes line
320 numbers and corresponding addresses unordered, and we end up
321 with a line table like:
338 and that breaks gdb's binary search on line numbers, if the
339 above table is not sorted on line numbers. And that sort
340 should be on function based, since gcc can emit line numbers
343 10 0x100 - for the init/test part of a for stmt.
346 10 0x400 - for the increment part of a for stmt.
348 arrange_linetable() will do this sorting.
350 2) aix symbol table might look like:
352 c_file // beginning of a new file
353 .bi // beginning of include file
354 .ei // end of include file
358 basically, .bi/.ei pairs do not necessarily encapsulate
359 their scope. They need to be recorded, and processed later
360 on when we come the end of the compilation unit.
361 Include table (inclTable) and process_linenos() handle
367 /* compare line table entry addresses. */
370 compare_lte (const void *lte1p
, const void *lte2p
)
372 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
373 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
374 return lte1
->pc
- lte2
->pc
;
377 /* Given a line table with function entries are marked, arrange its functions
378 in ascending order and strip off function entry markers and return it in
379 a newly created table. If the old one is good enough, return the old one. */
380 /* FIXME: I think all this stuff can be replaced by just passing
381 sort_linevec = 1 to end_symtab. */
383 static struct linetable
*
384 arrange_linetable (struct linetable
*oldLineTb
)
386 int ii
, jj
, newline
, /* new line count */
387 function_count
; /* # of functions */
389 struct linetable_entry
*fentry
; /* function entry vector */
390 int fentry_size
; /* # of function entries */
391 struct linetable
*newLineTb
; /* new line table */
393 #define NUM_OF_FUNCTIONS 20
395 fentry_size
= NUM_OF_FUNCTIONS
;
396 fentry
= (struct linetable_entry
*)
397 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
399 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
402 if (oldLineTb
->item
[ii
].line
== 0)
403 { /* function entry found. */
405 if (function_count
>= fentry_size
)
406 { /* make sure you have room. */
408 fentry
= (struct linetable_entry
*)
409 xrealloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
411 fentry
[function_count
].line
= ii
;
412 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
417 if (function_count
== 0)
422 else if (function_count
> 1)
423 qsort (fentry
, function_count
, sizeof (struct linetable_entry
), compare_lte
);
425 /* allocate a new line table. */
426 newLineTb
= (struct linetable
*)
428 (sizeof (struct linetable
) +
429 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
431 /* if line table does not start with a function beginning, copy up until
435 if (oldLineTb
->item
[0].line
!= 0)
437 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
438 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
440 /* Now copy function lines one by one. */
442 for (ii
= 0; ii
< function_count
; ++ii
)
444 for (jj
= fentry
[ii
].line
+ 1;
445 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
447 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
450 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
454 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
455 following `IncludeChain'. At the end of each symtab (end_symtab),
456 we will determine if we should create additional symtab's to
457 represent if (the include files. */
460 typedef struct _inclTable
462 char *name
; /* include filename */
464 /* Offsets to the line table. end points to the last entry which is
465 part of this include file. */
468 struct subfile
*subfile
;
469 unsigned funStartLine
; /* start line # of its function */
473 #define INITIAL_INCLUDE_TABLE_LENGTH 20
474 static InclTable
*inclTable
; /* global include table */
475 static int inclIndx
; /* last entry to table */
476 static int inclLength
; /* table length */
477 static int inclDepth
; /* nested include depth */
479 static void allocate_include_entry (void);
482 record_include_begin (struct coff_symbol
*cs
)
486 /* In xcoff, we assume include files cannot be nested (not in .c files
487 of course, but in corresponding .s files.). */
489 /* This can happen with old versions of GCC.
490 GCC 2.3.3-930426 does not exhibit this on a test case which
491 a user said produced the message for him. */
492 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
496 allocate_include_entry ();
498 inclTable
[inclIndx
].name
= cs
->c_name
;
499 inclTable
[inclIndx
].begin
= cs
->c_value
;
503 record_include_end (struct coff_symbol
*cs
)
509 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
512 allocate_include_entry ();
514 pTbl
= &inclTable
[inclIndx
];
515 pTbl
->end
= cs
->c_value
;
522 allocate_include_entry (void)
524 if (inclTable
== NULL
)
526 inclTable
= (InclTable
*)
527 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
529 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
530 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
533 else if (inclIndx
>= inclLength
)
535 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
536 inclTable
= (InclTable
*)
537 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
538 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
539 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
543 /* Global variable to pass the psymtab down to all the routines involved
544 in psymtab to symtab processing. */
545 static struct partial_symtab
*this_symtab_psymtab
;
547 /* given the start and end addresses of a compilation unit (or a csect,
548 at times) process its lines and create appropriate line vectors. */
551 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
554 file_ptr max_offset
=
555 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->deprecated_sym_private
)
558 /* subfile structure for the main compilation unit. */
559 struct subfile main_subfile
;
561 /* In the main source file, any time we see a function entry, we
562 reset this variable to function's absolute starting line number.
563 All the following line numbers in the function are relative to
564 this, and we record absolute line numbers in record_line(). */
566 unsigned int main_source_baseline
= 0;
571 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
573 goto return_after_cleanup
;
575 memset (&main_subfile
, '\0', sizeof (main_subfile
));
578 /* All source lines were in the main source file. None in include files. */
580 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
581 &main_source_baseline
);
585 /* There was source with line numbers in include files. */
588 coff_data (this_symtab_psymtab
->objfile
->obfd
)->local_linesz
;
589 main_source_baseline
= 0;
591 for (ii
= 0; ii
< inclIndx
; ++ii
)
593 struct subfile
*tmpSubfile
;
595 /* If there is main file source before include file, enter it. */
596 if (offset
< inclTable
[ii
].begin
)
599 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
600 start
, 0, &main_source_baseline
);
603 /* Have a new subfile for the include file. */
605 tmpSubfile
= inclTable
[ii
].subfile
=
606 (struct subfile
*) xmalloc (sizeof (struct subfile
));
608 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
609 firstLine
= &(inclTable
[ii
].funStartLine
);
611 /* Enter include file's lines now. */
612 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
613 inclTable
[ii
].end
, start
, 0, firstLine
);
615 if (offset
<= inclTable
[ii
].end
)
616 offset
= inclTable
[ii
].end
+ linesz
;
619 /* All the include files' line have been processed at this point. Now,
620 enter remaining lines of the main file, if any left. */
621 if (offset
< max_offset
+ 1 - linesz
)
623 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
624 &main_source_baseline
);
628 /* Process main file's line numbers. */
629 if (main_subfile
.line_vector
)
631 struct linetable
*lineTb
, *lv
;
633 lv
= main_subfile
.line_vector
;
635 /* Line numbers are not necessarily ordered. xlc compilation will
636 put static function to the end. */
638 lineTb
= arrange_linetable (lv
);
641 current_subfile
->line_vector
= (struct linetable
*)
642 xrealloc (lv
, (sizeof (struct linetable
)
643 + lv
->nitems
* sizeof (struct linetable_entry
)));
648 current_subfile
->line_vector
= lineTb
;
651 current_subfile
->line_vector_length
=
652 current_subfile
->line_vector
->nitems
;
655 /* Now, process included files' line numbers. */
657 for (ii
= 0; ii
< inclIndx
; ++ii
)
659 if ((inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!! FIXMEmgo */
661 struct linetable
*lineTb
, *lv
;
663 lv
= (inclTable
[ii
].subfile
)->line_vector
;
665 /* Line numbers are not necessarily ordered. xlc compilation will
666 put static function to the end. */
668 lineTb
= arrange_linetable (lv
);
672 /* For the same include file, we might want to have more than one
673 subfile. This happens if we have something like:
681 while foo.h including code in it. (stupid but possible)
682 Since start_subfile() looks at the name and uses an
683 existing one if finds, we need to provide a fake name and
687 start_subfile (inclTable
[ii
].name
, (char *) 0);
690 /* Pick a fake name that will produce the same results as this
691 one when passed to deduce_language_from_filename. Kludge on
693 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
694 if (fakename
== NULL
)
696 start_subfile (fakename
, (char *) 0);
697 xfree (current_subfile
->name
);
699 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
704 current_subfile
->line_vector
=
705 (struct linetable
*) xrealloc
706 (lv
, (sizeof (struct linetable
)
707 + lv
->nitems
* sizeof (struct linetable_entry
)));
713 current_subfile
->line_vector
= lineTb
;
716 current_subfile
->line_vector_length
=
717 current_subfile
->line_vector
->nitems
;
718 start_subfile (pop_subfile (), (char *) 0);
722 return_after_cleanup
:
724 /* We don't want to keep alloc/free'ing the global include file table. */
727 /* Start with a fresh subfile structure for the next file. */
728 memset (&main_subfile
, '\0', sizeof (struct subfile
));
732 aix_process_linenos (void)
734 /* process line numbers and enter them into line vector */
735 process_linenos (last_source_start_addr
, cur_src_end_addr
);
739 /* Enter a given range of lines into the line vector.
740 can be called in the following two ways:
741 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
742 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
744 endoffset points to the last line table entry that we should pay
748 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
, unsigned endoffset
, /* offsets to line table */
749 CORE_ADDR startaddr
, /* offsets to line table */
750 CORE_ADDR endaddr
, unsigned *firstLine
)
752 unsigned int curoffset
;
755 struct internal_lineno int_lnno
;
756 unsigned int limit_offset
;
760 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
762 curoffset
= beginoffset
;
764 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->deprecated_sym_private
)
769 if (endoffset
>= limit_offset
)
771 complaint (&symfile_complaints
,
772 _("Bad line table offset in C_EINCL directive"));
775 limit_offset
= endoffset
;
780 abfd
= this_symtab_psymtab
->objfile
->obfd
;
781 linesz
= coff_data (abfd
)->local_linesz
;
782 ext_lnno
= alloca (linesz
);
784 while (curoffset
<= limit_offset
)
786 bfd_seek (abfd
, curoffset
, SEEK_SET
);
787 bfd_bread (ext_lnno
, linesz
, abfd
);
788 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
790 /* Find the address this line represents. */
791 addr
= (int_lnno
.l_lnno
792 ? int_lnno
.l_addr
.l_paddr
793 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
794 addr
+= ANOFFSET (this_symtab_psymtab
->objfile
->section_offsets
,
795 SECT_OFF_TEXT (this_symtab_psymtab
->objfile
));
797 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
800 if (int_lnno
.l_lnno
== 0)
802 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
803 record_line (subfile
, 0, addr
);
807 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
, addr
);
813 /* Save the vital information for use when closing off the current file.
814 NAME is the file name the symbols came from, START_ADDR is the first
815 text address for the file, and SIZE is the number of bytes of text. */
817 #define complete_symtab(name, start_addr) { \
818 last_source_file = savestring (name, strlen (name)); \
819 last_source_start_addr = start_addr; \
823 /* Refill the symbol table input buffer
824 and set the variables that control fetching entries from it.
825 Reports an error if no data available.
826 This function can read past the end of the symbol table
827 (into the string table) but this does no harm. */
829 /* Reading symbol table has to be fast! Keep the followings as macros, rather
832 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
836 if (namestr[0] == '.') ++namestr; \
837 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
838 (SECTION), (asection *)NULL, (OBJFILE)); \
839 misc_func_recorded = 1; \
843 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
844 nested. At any given time, a symbol can only be in one static block.
845 This is the base address of current static block, zero if non exists. */
847 static int static_block_base
= 0;
849 /* Section number for the current static block. */
851 static int static_block_section
= -1;
853 /* true if space for symbol name has been allocated. */
855 static int symname_alloced
= 0;
857 /* Next symbol to read. Pointer into raw seething symbol table. */
859 static char *raw_symbol
;
861 /* This is the function which stabsread.c calls to get symbol
865 xcoff_next_symbol_text (struct objfile
*objfile
)
867 struct internal_syment symbol
;
869 /* FIXME: is this the same as the passed arg? */
870 if (this_symtab_psymtab
)
871 objfile
= this_symtab_psymtab
->objfile
;
873 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
876 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
878 /* Return something which points to '\0' and hope the symbol reading
879 code does something reasonable. */
882 else if (symbol
.n_sclass
& 0x80)
885 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
888 coff_data (objfile
->obfd
)->local_symesz
;
893 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
895 /* Return something which points to '\0' and hope the symbol reading
896 code does something reasonable. */
902 /* Read symbols for a given partial symbol table. */
905 read_xcoff_symtab (struct partial_symtab
*pst
)
907 struct objfile
*objfile
= pst
->objfile
;
908 bfd
*abfd
= objfile
->obfd
;
909 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
910 char *strtbl
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
;
912 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
;
913 char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
915 struct internal_syment symbol
[1];
916 union internal_auxent main_aux
;
917 struct coff_symbol cs
[1];
918 CORE_ADDR file_start_addr
= 0;
919 CORE_ADDR file_end_addr
= 0;
921 int next_file_symnum
= -1;
922 unsigned int max_symnum
;
923 int just_started
= 1;
925 int fcn_start_addr
= 0;
927 struct coff_symbol fcn_stab_saved
= { 0 };
929 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
930 union internal_auxent fcn_aux_saved
;
931 struct context_stack
*new;
933 char *filestring
= " _start_ "; /* Name of the current file. */
935 char *last_csect_name
; /* last seen csect's name and value */
936 CORE_ADDR last_csect_val
;
939 this_symtab_psymtab
= pst
;
941 /* Get the appropriate COFF "constants" related to the file we're
943 local_symesz
= coff_data (abfd
)->local_symesz
;
945 last_source_file
= NULL
;
950 start_symtab (filestring
, (char *) NULL
, file_start_addr
);
951 record_debugformat (debugfmt
);
952 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
954 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
955 first_object_file_end
= 0;
958 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
959 + symnum
* local_symesz
;
961 while (symnum
< max_symnum
)
964 QUIT
; /* make this command interruptable. */
966 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
967 /* read one symbol into `cs' structure. After processing the
968 whole symbol table, only string table will be kept in memory,
969 symbol table and debug section of xcoff will be freed. Thus
970 we can mark symbols with names in string table as
975 /* Swap and align the symbol into a reasonable C structure. */
976 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
978 cs
->c_symnum
= symnum
;
979 cs
->c_naux
= symbol
->n_numaux
;
980 if (symbol
->n_zeroes
)
983 /* We must use the original, unswapped, name here so the name field
984 pointed to by cs->c_name will persist throughout xcoffread. If
985 we use the new field, it gets overwritten for each symbol. */
986 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
987 /* If it's exactly E_SYMNMLEN characters long it isn't
989 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
992 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
993 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
994 p
[E_SYMNMLEN
] = '\0';
999 else if (symbol
->n_sclass
& 0x80)
1001 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1002 symname_alloced
= 0;
1006 /* in string table */
1007 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1008 symname_alloced
= 1;
1010 cs
->c_value
= symbol
->n_value
;
1011 cs
->c_sclass
= symbol
->n_sclass
;
1012 cs
->c_secnum
= symbol
->n_scnum
;
1013 cs
->c_type
= (unsigned) symbol
->n_type
;
1015 raw_symbol
+= local_symesz
;
1018 /* Save addr of first aux entry. */
1019 raw_auxptr
= raw_symbol
;
1021 /* Skip all the auxents associated with this symbol. */
1022 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1024 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1029 /* if symbol name starts with ".$" or "$", ignore it. */
1030 if (cs
->c_name
[0] == '$'
1031 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1034 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1036 if (last_source_file
)
1039 end_symtab (cur_src_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1044 start_symtab ("_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1045 record_debugformat (debugfmt
);
1046 cur_src_end_addr
= first_object_file_end
;
1047 /* done with all files, everything from here on is globals */
1050 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1053 /* Dealing with a symbol with a csect entry. */
1055 #define CSECT(PP) ((PP)->x_csect)
1056 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1057 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1058 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1059 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1061 /* Convert the auxent to something we can access. */
1062 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1063 0, cs
->c_naux
, &main_aux
);
1065 switch (CSECT_SMTYP (&main_aux
))
1069 /* Ignore all external references. */
1073 /* A section description. */
1075 switch (CSECT_SCLAS (&main_aux
))
1081 /* A program csect is seen. We have to allocate one
1082 symbol table for each program csect. Normally gdb
1083 prefers one symtab for each source file. In case
1084 of AIX, one source file might include more than one
1085 [PR] csect, and they don't have to be adjacent in
1086 terms of the space they occupy in memory. Thus, one
1087 single source file might get fragmented in the
1088 memory and gdb's file start and end address
1089 approach does not work! GCC (and I think xlc) seem
1090 to put all the code in the unnamed program csect. */
1092 if (last_csect_name
)
1094 complete_symtab (filestring
, file_start_addr
);
1095 cur_src_end_addr
= file_end_addr
;
1096 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1099 /* Give all csects for this source file the same
1101 start_symtab (filestring
, NULL
, (CORE_ADDR
) 0);
1102 record_debugformat (debugfmt
);
1105 /* If this is the very first csect seen,
1106 basically `__start'. */
1109 first_object_file_end
1110 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1115 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1116 SECT_OFF_TEXT (objfile
));
1117 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1119 if (cs
->c_name
&& (cs
->c_name
[0] == '.'
1120 || cs
->c_name
[0] == '@'))
1122 last_csect_name
= cs
->c_name
;
1123 last_csect_val
= cs
->c_value
;
1124 last_csect_sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1129 /* All other symbols are put into the minimal symbol
1142 /* Ignore the symbol. */
1150 switch (CSECT_SCLAS (&main_aux
))
1153 /* a function entry point. */
1154 function_entry_point
:
1156 fcn_start_addr
= cs
->c_value
;
1158 /* save the function header info, which will be used
1159 when `.bf' is seen. */
1161 fcn_aux_saved
= main_aux
;
1165 /* shared library function trampoline code entry point. */
1169 /* The symbols often have the same names as debug symbols for
1170 functions, and confuse lookup_symbol. */
1174 /* xlc puts each variable in a separate csect, so we get
1175 an XTY_SD for each variable. But gcc puts several
1176 variables in a csect, so that each variable only gets
1177 an XTY_LD. This will typically be XMC_RW; I suspect
1178 XMC_RO and XMC_BS might be possible too.
1179 These variables are put in the minimal symbol table
1186 /* Common symbols are put into the minimal symbol table only. */
1194 /* If explicitly specified as a function, treat is as one. This check
1195 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1196 after the above CSECT check. */
1197 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1199 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1200 0, cs
->c_naux
, &main_aux
);
1201 goto function_entry_point
;
1204 switch (cs
->c_sclass
)
1209 /* c_value field contains symnum of next .file entry in table
1210 or symnum of first global after last .file. */
1212 next_file_symnum
= cs
->c_value
;
1214 /* Complete symbol table for last object file containing
1215 debugging information. */
1217 /* Whether or not there was a csect in the previous file, we
1218 have to call `end_stabs' and `start_stabs' to reset
1219 type_vector, line_vector, etc. structures. */
1221 complete_symtab (filestring
, file_start_addr
);
1222 cur_src_end_addr
= file_end_addr
;
1223 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1226 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1227 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1228 standard COFF way and put it in the auxent. We use the auxent if
1229 the symbol is ".file" and an auxent exists, otherwise use the symbol
1230 itself. Simple enough. */
1231 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1233 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1234 0, cs
->c_naux
, &main_aux
);
1235 filestring
= coff_getfilename (&main_aux
, objfile
);
1238 filestring
= cs
->c_name
;
1241 start_symtab (filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1242 record_debugformat (debugfmt
);
1243 last_csect_name
= 0;
1245 /* reset file start and end addresses. A compilation unit with no text
1246 (only data) should have zero file boundaries. */
1247 file_start_addr
= file_end_addr
= 0;
1251 fcn_stab_saved
= *cs
;
1255 if (strcmp (cs
->c_name
, ".bf") == 0)
1257 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1258 SECT_OFF_TEXT (objfile
));
1259 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1260 0, cs
->c_naux
, &main_aux
);
1262 within_function
= 1;
1264 new = push_context (0, fcn_start_addr
+ off
);
1266 new->name
= define_symbol
1267 (fcn_cs_saved
.c_value
+ off
,
1268 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1269 if (new->name
!= NULL
)
1270 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT (objfile
);
1272 else if (strcmp (cs
->c_name
, ".ef") == 0)
1275 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1276 0, cs
->c_naux
, &main_aux
);
1278 /* The value of .ef is the address of epilogue code;
1279 not useful for gdb. */
1280 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1281 contains number of lines to '}' */
1283 if (context_stack_depth
<= 0)
1284 { /* We attempted to pop an empty context stack */
1285 ef_complaint (cs
->c_symnum
);
1286 within_function
= 0;
1289 new = pop_context ();
1290 /* Stack must be empty now. */
1291 if (context_stack_depth
> 0 || new == NULL
)
1293 ef_complaint (cs
->c_symnum
);
1294 within_function
= 0;
1298 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1300 (fcn_cs_saved
.c_value
1301 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1302 + ANOFFSET (objfile
->section_offsets
,
1303 SECT_OFF_TEXT (objfile
))),
1305 within_function
= 0;
1310 /* Begin static block. */
1312 struct internal_syment symbol
;
1314 read_symbol (&symbol
, cs
->c_value
);
1315 static_block_base
= symbol
.n_value
;
1316 static_block_section
=
1317 secnum_to_section (symbol
.n_scnum
, objfile
);
1322 /* End of static block. */
1323 static_block_base
= 0;
1324 static_block_section
= -1;
1335 complaint (&symfile_complaints
, _("Unrecognized storage class %d."),
1350 /* beginning of include file */
1351 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1352 order. Thus, when wee see them, we might not know enough info
1353 to process them. Thus, we'll be saving them into a table
1354 (inclTable) and postpone their processing. */
1356 record_include_begin (cs
);
1360 /* End of include file. */
1361 /* See the comment after case C_BINCL. */
1362 record_include_end (cs
);
1366 if (strcmp (cs
->c_name
, ".bb") == 0)
1369 new = push_context (depth
,
1371 + ANOFFSET (objfile
->section_offsets
,
1372 SECT_OFF_TEXT (objfile
))));
1374 else if (strcmp (cs
->c_name
, ".eb") == 0)
1376 if (context_stack_depth
<= 0)
1377 { /* We attempted to pop an empty context stack */
1378 eb_complaint (cs
->c_symnum
);
1381 new = pop_context ();
1382 if (depth
-- != new->depth
)
1384 eb_complaint (cs
->c_symnum
);
1387 if (local_symbols
&& context_stack_depth
> 0)
1389 /* Make a block for the local symbols within. */
1390 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1393 + ANOFFSET (objfile
->section_offsets
,
1394 SECT_OFF_TEXT (objfile
))),
1397 local_symbols
= new->locals
;
1402 process_xcoff_symbol (cs
, objfile
);
1407 if (last_source_file
)
1411 complete_symtab (filestring
, file_start_addr
);
1412 cur_src_end_addr
= file_end_addr
;
1413 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1414 /* When reading symbols for the last C_FILE of the objfile, try
1415 to make sure that we set pst->symtab to the symtab for the
1416 file, not to the _globals_ symtab. I'm not sure whether this
1417 actually works right or when/if it comes up. */
1418 if (pst
->symtab
== NULL
)
1424 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1425 (SYMBOL2) = (struct symbol *) \
1426 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1427 *(SYMBOL2) = *(SYMBOL1);
1430 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1431 ((ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->objfile_obstack))
1434 /* process one xcoff symbol. */
1436 static struct symbol
*
1437 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1439 struct gdbarch
*gdbarch
= get_objfile_arch (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 SYMBOL_SET_LINKAGE_NAME (sym
, SYMNAME_ALLOC (name
, symname_alloced
));
1479 SYMBOL_TYPE (sym
) = builtin_type (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 (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 (strcmp (name
, ".bf") == 0)
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 (strcmp (asect
->name
, ".text") != 0 || 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 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2124 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2125 char *filestring
= NULL
;
2128 int past_first_source_file
= 0;
2133 /* Current partial symtab */
2134 struct partial_symtab
*pst
;
2136 /* List of current psymtab's include files */
2137 char **psymtab_include_list
;
2138 int includes_allocated
;
2141 /* Index within current psymtab dependency list */
2142 struct partial_symtab
**dependency_list
;
2143 int dependencies_used
, dependencies_allocated
;
2146 struct internal_syment symbol
;
2147 union internal_auxent main_aux
[5];
2148 unsigned int ssymnum
;
2150 char *last_csect_name
= NULL
; /* last seen csect's name and value */
2151 CORE_ADDR last_csect_val
= 0;
2152 int last_csect_sec
= 0;
2153 int misc_func_recorded
= 0; /* true if any misc. function */
2154 int textlow_not_set
= 1;
2156 pst
= (struct partial_symtab
*) 0;
2158 includes_allocated
= 30;
2160 psymtab_include_list
= (char **) alloca (includes_allocated
*
2163 dependencies_allocated
= 30;
2164 dependencies_used
= 0;
2166 (struct partial_symtab
**) alloca (dependencies_allocated
*
2167 sizeof (struct partial_symtab
*));
2169 last_source_file
= NULL
;
2171 abfd
= objfile
->obfd
;
2172 next_symbol_text_func
= xcoff_next_symbol_text
;
2174 sraw_symbol
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
;
2175 nsyms
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl_num_syms
;
2177 while (ssymnum
< nsyms
)
2183 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2184 sclass
= symbol
.n_sclass
;
2191 /* The CSECT auxent--always the last auxent. */
2192 union internal_auxent csect_aux
;
2193 unsigned int symnum_before
= ssymnum
;
2195 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2197 if (symbol
.n_numaux
> 1)
2199 bfd_coff_swap_aux_in
2201 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2204 symbol
.n_numaux
- 1,
2209 csect_aux
= main_aux
[0];
2211 /* If symbol name starts with ".$" or "$", ignore it. */
2212 if (namestring
[0] == '$'
2213 || (namestring
[0] == '.' && namestring
[1] == '$'))
2216 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2219 switch (csect_aux
.x_csect
.x_smclas
)
2222 if (last_csect_name
)
2224 /* If no misc. function recorded in the last
2225 seen csect, enter it as a function. This
2226 will take care of functions like strcmp()
2229 if (!misc_func_recorded
)
2231 RECORD_MINIMAL_SYMBOL
2232 (last_csect_name
, last_csect_val
,
2233 mst_text
, last_csect_sec
,
2239 /* We have to allocate one psymtab for
2240 each program csect, because their text
2241 sections need not be adjacent. */
2243 (pst
, psymtab_include_list
, includes_used
,
2244 symnum_before
, dependency_list
,
2245 dependencies_used
, textlow_not_set
);
2247 dependencies_used
= 0;
2248 /* Give all psymtabs for this source file the same
2250 pst
= xcoff_start_psymtab
2254 objfile
->global_psymbols
.next
,
2255 objfile
->static_psymbols
.next
);
2258 /* Activate the misc_func_recorded mechanism for
2259 compiler- and linker-generated CSECTs like ".strcmp"
2261 if (namestring
&& (namestring
[0] == '.'
2262 || namestring
[0] == '@'))
2264 last_csect_name
= namestring
;
2265 last_csect_val
= symbol
.n_value
;
2267 secnum_to_section (symbol
.n_scnum
, objfile
);
2272 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2273 if (highval
> pst
->texthigh
)
2274 pst
->texthigh
= highval
;
2275 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2276 pst
->textlow
= symbol
.n_value
;
2278 misc_func_recorded
= 0;
2283 /* Data variables are recorded in the minimal symbol
2284 table, except for section symbols. */
2285 if (*namestring
!= '.')
2286 prim_record_minimal_symbol_and_info
2287 (namestring
, symbol
.n_value
,
2288 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2289 secnum_to_section (symbol
.n_scnum
, objfile
),
2295 warning (_("More than one XMC_TC0 symbol found."));
2296 toc_offset
= symbol
.n_value
;
2298 /* Make TOC offset relative to start address of section. */
2299 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2301 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2305 /* These symbols tell us where the TOC entry for a
2306 variable is, not the variable itself. */
2315 switch (csect_aux
.x_csect
.x_smclas
)
2318 /* A function entry point. */
2320 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2321 first_fun_line_offset
=
2322 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2323 RECORD_MINIMAL_SYMBOL
2324 (namestring
, symbol
.n_value
,
2325 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2326 secnum_to_section (symbol
.n_scnum
, objfile
),
2331 /* shared library function trampoline code entry
2334 /* record trampoline code entries as
2335 mst_solib_trampoline symbol. When we lookup mst
2336 symbols, we will choose mst_text over
2337 mst_solib_trampoline. */
2338 RECORD_MINIMAL_SYMBOL
2339 (namestring
, symbol
.n_value
,
2340 mst_solib_trampoline
,
2341 secnum_to_section (symbol
.n_scnum
, objfile
),
2346 /* The symbols often have the same names as
2347 debug symbols for functions, and confuse
2353 /* xlc puts each variable in a separate csect,
2354 so we get an XTY_SD for each variable. But
2355 gcc puts several variables in a csect, so
2356 that each variable only gets an XTY_LD. We
2357 still need to record them. This will
2358 typically be XMC_RW; I suspect XMC_RO and
2359 XMC_BS might be possible too. */
2360 if (*namestring
!= '.')
2361 prim_record_minimal_symbol_and_info
2362 (namestring
, symbol
.n_value
,
2363 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2364 secnum_to_section (symbol
.n_scnum
, objfile
),
2371 switch (csect_aux
.x_csect
.x_smclas
)
2375 /* Common variables are recorded in the minimal symbol
2376 table, except for section symbols. */
2377 if (*namestring
!= '.')
2378 prim_record_minimal_symbol_and_info
2379 (namestring
, symbol
.n_value
,
2380 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2381 secnum_to_section (symbol
.n_scnum
, objfile
),
2394 unsigned int symnum_before
;
2396 symnum_before
= ssymnum
;
2397 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2400 /* See if the last csect needs to be recorded. */
2402 if (last_csect_name
&& !misc_func_recorded
)
2405 /* If no misc. function recorded in the last seen csect, enter
2406 it as a function. This will take care of functions like
2407 strcmp() compiled by xlc. */
2409 RECORD_MINIMAL_SYMBOL
2410 (last_csect_name
, last_csect_val
,
2411 mst_text
, last_csect_sec
, objfile
);
2416 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2417 symnum_before
, dependency_list
,
2418 dependencies_used
, textlow_not_set
);
2420 dependencies_used
= 0;
2422 first_fun_line_offset
= 0;
2424 /* XCOFF, according to the AIX 3.2 documentation, puts the
2425 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2426 do things the standard COFF way and put it in the auxent.
2427 We use the auxent if the symbol is ".file" and an auxent
2428 exists, otherwise use the symbol itself. */
2429 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2431 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2434 filestring
= namestring
;
2436 pst
= xcoff_start_psymtab (objfile
,
2439 objfile
->global_psymbols
.next
,
2440 objfile
->static_psymbols
.next
);
2441 last_csect_name
= NULL
;
2447 complaint (&symfile_complaints
,
2448 _("Storage class %d not recognized during scan"), sclass
);
2452 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2453 to handle only the C_FUN and C_EXT. */
2468 /* C_EINCL means we are switching back to the main file. But there
2469 is no reason to care; the only thing we want to know about
2470 includes is the names of all the included (.h) files. */
2475 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2479 /* I don't think the name of the common block (as opposed to the
2480 variables within it) is something which is user visible
2488 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2489 so C_LSYM would appear to be only for locals. */
2495 /* We probably could save a few instructions by assuming that
2496 C_LSYM, C_PSYM, etc., never have auxents. */
2497 int naux1
= symbol
.n_numaux
+ 1;
2499 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2505 /* Mark down an include file in the current psymtab */
2506 enum language tmp_language
;
2507 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2510 tmp_language
= deduce_language_from_filename (namestring
);
2512 /* Only change the psymtab's language if we've learned
2513 something useful (eg. tmp_language is not language_unknown).
2514 In addition, to match what start_subfile does, never change
2516 if (tmp_language
!= language_unknown
2517 && (tmp_language
!= language_c
2518 || psymtab_language
!= language_cplus
))
2519 psymtab_language
= tmp_language
;
2521 /* In C++, one may expect the same filename to come round many
2522 times, when code is coming alternately from the main file
2523 and from inline functions in other files. So I check to see
2524 if this is a file we've seen before -- either the main
2525 source file, or a previously included file.
2527 This seems to be a lot of time to be spending on N_SOL, but
2528 things like "break c-exp.y:435" need to work (I
2529 suppose the psymtab_include_list could be hashed or put
2530 in a binary tree, if profiling shows this is a major hog). */
2531 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2535 for (i
= 0; i
< includes_used
; i
++)
2536 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2544 psymtab_include_list
[includes_used
++] = namestring
;
2545 if (includes_used
>= includes_allocated
)
2547 char **orig
= psymtab_include_list
;
2549 psymtab_include_list
= (char **)
2550 alloca ((includes_allocated
*= 2) *
2552 memcpy (psymtab_include_list
, orig
,
2553 includes_used
* sizeof (char *));
2558 /* The value of the C_FUN is not the address of the function (it
2559 appears to be the address before linking), but as long as it
2560 is smaller than the actual address, then find_pc_partial_function
2561 will use the minimal symbols instead. I hope. */
2569 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2572 p
= (char *) strchr (namestring
, ':');
2574 continue; /* Not a debugging symbol. */
2576 /* Main processing section for debugging symbols which
2577 the initial read through the symbol tables needs to worry
2578 about. If we reach this point, the symbol which we are
2579 considering is definitely one we are interested in.
2580 p must also contain the (valid) index into the namestring
2581 which indicates the debugging type symbol. */
2586 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
2588 if (gdbarch_static_transform_name_p (gdbarch
))
2589 namestring
= gdbarch_static_transform_name
2590 (gdbarch
, namestring
);
2592 add_psymbol_to_list (namestring
, p
- namestring
,
2593 VAR_DOMAIN
, LOC_STATIC
,
2594 &objfile
->static_psymbols
,
2596 psymtab_language
, objfile
);
2600 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
2601 /* The addresses in these entries are reported to be
2602 wrong. See the code that reads 'G's for symtabs. */
2603 add_psymbol_to_list (namestring
, p
- namestring
,
2604 VAR_DOMAIN
, LOC_STATIC
,
2605 &objfile
->global_psymbols
,
2607 psymtab_language
, objfile
);
2611 /* When a 'T' entry is defining an anonymous enum, it
2612 may have a name which is the empty string, or a
2613 single space. Since they're not really defining a
2614 symbol, those shouldn't go in the partial symbol
2615 table. We do pick up the elements of such enums at
2616 'check_enum:', below. */
2617 if (p
>= namestring
+ 2
2618 || (p
== namestring
+ 1
2619 && namestring
[0] != ' '))
2621 add_psymbol_to_list (namestring
, p
- namestring
,
2622 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2623 &objfile
->static_psymbols
,
2625 psymtab_language
, objfile
);
2628 /* Also a typedef with the same name. */
2629 add_psymbol_to_list (namestring
, p
- namestring
,
2630 VAR_DOMAIN
, LOC_TYPEDEF
,
2631 &objfile
->static_psymbols
,
2633 psymtab_language
, objfile
);
2640 if (p
!= namestring
) /* a name is there, not just :T... */
2642 add_psymbol_to_list (namestring
, p
- namestring
,
2643 VAR_DOMAIN
, LOC_TYPEDEF
,
2644 &objfile
->static_psymbols
,
2646 psymtab_language
, objfile
);
2649 /* If this is an enumerated type, we need to
2650 add all the enum constants to the partial symbol
2651 table. This does not cover enums without names, e.g.
2652 "enum {a, b} c;" in C, but fortunately those are
2653 rare. There is no way for GDB to find those from the
2654 enum type without spending too much time on it. Thus
2655 to solve this problem, the compiler needs to put out the
2656 enum in a nameless type. GCC2 does this. */
2658 /* We are looking for something of the form
2659 <name> ":" ("t" | "T") [<number> "="] "e"
2660 {<constant> ":" <value> ","} ";". */
2662 /* Skip over the colon and the 't' or 'T'. */
2664 /* This type may be given a number. Also, numbers can come
2665 in pairs like (0,26). Skip over it. */
2666 while ((*p
>= '0' && *p
<= '9')
2667 || *p
== '(' || *p
== ',' || *p
== ')'
2673 /* The aix4 compiler emits extra crud before the members. */
2676 /* Skip over the type (?). */
2680 /* Skip over the colon. */
2684 /* We have found an enumerated type. */
2685 /* According to comments in read_enum_type
2686 a comma could end it instead of a semicolon.
2687 I don't know where that happens.
2689 while (*p
&& *p
!= ';' && *p
!= ',')
2693 /* Check for and handle cretinous dbx symbol name
2695 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2696 p
= next_symbol_text (objfile
);
2698 /* Point to the character after the name
2699 of the enum constant. */
2700 for (q
= p
; *q
&& *q
!= ':'; q
++)
2702 /* Note that the value doesn't matter for
2703 enum constants in psymtabs, just in symtabs. */
2704 add_psymbol_to_list (p
, q
- p
,
2705 VAR_DOMAIN
, LOC_CONST
,
2706 &objfile
->static_psymbols
, 0,
2707 0, psymtab_language
, objfile
);
2708 /* Point past the name. */
2710 /* Skip over the value. */
2711 while (*p
&& *p
!= ',')
2713 /* Advance past the comma. */
2721 /* Constant, e.g. from "const" in Pascal. */
2722 add_psymbol_to_list (namestring
, p
- namestring
,
2723 VAR_DOMAIN
, LOC_CONST
,
2724 &objfile
->static_psymbols
, symbol
.n_value
,
2725 0, psymtab_language
, objfile
);
2731 int name_len
= p
- namestring
;
2732 char *name
= xmalloc (name_len
+ 1);
2733 memcpy (name
, namestring
, name_len
);
2734 name
[name_len
] = '\0';
2735 function_outside_compilation_unit_complaint (name
);
2738 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2739 add_psymbol_to_list (namestring
, p
- namestring
,
2740 VAR_DOMAIN
, LOC_BLOCK
,
2741 &objfile
->static_psymbols
,
2743 psymtab_language
, objfile
);
2746 /* Global functions were ignored here, but now they
2747 are put into the global psymtab like one would expect.
2748 They're also in the minimal symbol table. */
2752 int name_len
= p
- namestring
;
2753 char *name
= xmalloc (name_len
+ 1);
2754 memcpy (name
, namestring
, name_len
);
2755 name
[name_len
] = '\0';
2756 function_outside_compilation_unit_complaint (name
);
2760 /* We need only the minimal symbols for these
2761 loader-generated definitions. Keeping the global
2762 symbols leads to "in psymbols but not in symbols"
2764 if (strncmp (namestring
, "@FIX", 4) == 0)
2767 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2768 add_psymbol_to_list (namestring
, p
- namestring
,
2769 VAR_DOMAIN
, LOC_BLOCK
,
2770 &objfile
->global_psymbols
,
2772 psymtab_language
, objfile
);
2775 /* Two things show up here (hopefully); static symbols of
2776 local scope (static used inside braces) or extensions
2777 of structure symbols. We can ignore both. */
2791 case '#': /* for symbol identification (used in live ranges) */
2795 /* It is a C++ nested symbol. We don't need to record it
2796 (I don't think); if we try to look up foo::bar::baz,
2797 then symbols for the symtab containing foo should get
2798 read in, I think. */
2799 /* Someone says sun cc puts out symbols like
2800 /foo/baz/maclib::/usr/local/bin/maclib,
2801 which would get here with a symbol type of ':'. */
2805 /* Unexpected symbol descriptor. The second and subsequent stabs
2806 of a continued stab can show up here. The question is
2807 whether they ever can mimic a normal stab--it would be
2808 nice if not, since we certainly don't want to spend the
2809 time searching to the end of every string looking for
2812 complaint (&symfile_complaints
,
2813 _("unknown symbol descriptor `%c'"), p
[1]);
2815 /* Ignore it; perhaps it is an extension that we don't
2825 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2826 ssymnum
, dependency_list
,
2827 dependencies_used
, textlow_not_set
);
2830 /* Record the toc offset value of this symbol table into objfile structure.
2831 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2832 this information would be file auxiliary header. */
2834 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->toc_offset
= toc_offset
;
2837 /* Return the toc offset value for a given objfile. */
2840 xcoff_get_toc_offset (struct objfile
*objfile
)
2843 return ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->toc_offset
;
2847 /* Scan and build partial symbols for a symbol file.
2848 We have been initialized by a call to dbx_symfile_init, which
2849 put all the relevant info into a "struct dbx_symfile_info",
2850 hung off the objfile structure.
2852 SECTION_OFFSETS contains offsets relative to which the symbols in the
2853 various sections are (depending where the sections were actually loaded).
2854 MAINLINE is true if we are reading the main symbol
2855 table (as opposed to a shared lib or dynamically loaded file). */
2858 xcoff_initial_scan (struct objfile
*objfile
, int mainline
)
2862 struct cleanup
*back_to
;
2863 int num_symbols
; /* # of symbols */
2864 file_ptr symtab_offset
; /* symbol table and */
2865 file_ptr stringtab_offset
; /* string table file offsets */
2866 struct coff_symfile_info
*info
;
2870 info
= (struct coff_symfile_info
*) objfile
->deprecated_sym_private
;
2871 symfile_bfd
= abfd
= objfile
->obfd
;
2872 name
= objfile
->name
;
2874 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2875 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2876 stringtab_offset
= symtab_offset
+
2877 num_symbols
* coff_data (abfd
)->local_symesz
;
2879 info
->min_lineno_offset
= 0;
2880 info
->max_lineno_offset
= 0;
2881 bfd_map_over_sections (abfd
, find_linenos
, info
);
2883 if (num_symbols
> 0)
2885 /* Read the string table. */
2886 init_stringtab (abfd
, stringtab_offset
, objfile
);
2888 /* Read the .debug section, if present. */
2890 struct bfd_section
*secp
;
2891 bfd_size_type length
;
2892 char *debugsec
= NULL
;
2894 secp
= bfd_get_section_by_name (abfd
, ".debug");
2897 length
= bfd_section_size (abfd
, secp
);
2901 (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
2903 if (!bfd_get_section_contents (abfd
, secp
, debugsec
,
2904 (file_ptr
) 0, length
))
2906 error (_("Error reading .debug section of `%s': %s"),
2907 name
, bfd_errmsg (bfd_get_error ()));
2911 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
=
2916 /* Read the symbols. We keep them in core because we will want to
2917 access them randomly in read_symbol*. */
2918 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2920 error (_("Error reading symbols from %s: %s"),
2921 name
, bfd_errmsg (bfd_get_error ()));
2922 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2923 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
=
2924 obstack_alloc (&objfile
->objfile_obstack
, size
);
2925 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl_num_syms
=
2928 val
= bfd_bread (((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
,
2931 perror_with_name (_("reading symbol table"));
2933 /* If we are reinitializing, or if we have never loaded syms yet, init */
2935 || (objfile
->global_psymbols
.size
== 0
2936 && objfile
->static_psymbols
.size
== 0))
2937 /* I'm not sure how how good num_symbols is; the rule of thumb in
2938 init_psymbol_list was developed for a.out. On the one hand,
2939 num_symbols includes auxents. On the other hand, it doesn't
2941 init_psymbol_list (objfile
, num_symbols
);
2943 free_pending_blocks ();
2944 back_to
= make_cleanup (really_free_pendings
, 0);
2946 init_minimal_symbol_collection ();
2947 make_cleanup_discard_minimal_symbols ();
2949 /* Now that the symbol table data of the executable file are all in core,
2950 process them and define symbols accordingly. */
2952 scan_xcoff_symtab (objfile
);
2954 /* Install any minimal symbols that have been collected as the current
2955 minimal symbols for this objfile. */
2957 install_minimal_symbols (objfile
);
2959 do_cleanups (back_to
);
2963 xcoff_symfile_offsets (struct objfile
*objfile
, struct section_addr_info
*addrs
)
2965 asection
*sect
= NULL
;
2968 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
2969 objfile
->section_offsets
= (struct section_offsets
*)
2970 obstack_alloc (&objfile
->objfile_obstack
,
2971 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
2973 /* Initialize the section indexes for future use. */
2974 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
2976 objfile
->sect_index_text
= sect
->index
;
2978 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
2980 objfile
->sect_index_data
= sect
->index
;
2982 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
2984 objfile
->sect_index_bss
= sect
->index
;
2986 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
2988 objfile
->sect_index_rodata
= sect
->index
;
2990 for (i
= 0; i
< objfile
->num_sections
; ++i
)
2992 /* syms_from_objfile kindly subtracts from addr the
2993 bfd_section_vma of the .text section. This strikes me as
2994 wrong--whether the offset to be applied to symbol reading is
2995 relative to the start address of the section depends on the
2996 symbol format. In any event, this whole "addr" concept is
2997 pretty broken (it doesn't handle any section but .text
2998 sensibly), so just ignore the addr parameter and use 0.
2999 rs6000-nat.c will set the correct section offsets via
3000 objfile_relocate. */
3001 (objfile
->section_offsets
)->offsets
[i
] = 0;
3005 /* Register our ability to parse symbols for xcoff BFD files. */
3007 static struct sym_fns xcoff_sym_fns
=
3010 /* It is possible that coff and xcoff should be merged as
3011 they do have fundamental similarities (for example, the extra storage
3012 classes used for stabs could presumably be recognized in any COFF file).
3013 However, in addition to obvious things like all the csect hair, there are
3014 some subtler differences between xcoffread.c and coffread.c, notably
3015 the fact that coffread.c has no need to read in all the symbols, but
3016 xcoffread.c reads all the symbols and does in fact randomly access them
3017 (in C_BSTAT and line number processing). */
3019 bfd_target_xcoff_flavour
,
3021 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3022 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3023 xcoff_initial_scan
, /* sym_read: read a symbol file into symtab */
3024 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
3025 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
3026 default_symfile_segments
, /* sym_segments: Get segment information from
3028 aix_process_linenos
, /* sym_read_linetable */
3029 NULL
/* next: pointer to next struct sym_fns */
3032 /* Provide a prototype to silence -Wmissing-prototypes. */
3033 extern initialize_file_ftype _initialize_xcoffread
;
3036 _initialize_xcoffread (void)
3038 add_symtab_fns (&xcoff_sym_fns
);