1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
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., 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
28 #include <sys/types.h>
31 #include "gdb_string.h"
33 #include <sys/param.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"
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
->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
->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 (char *)NULL, (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 objfile
= this_symtab_psymtab
->objfile
;
872 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
875 complaint (&symfile_complaints
, "Unexpected symbol continuation");
877 /* Return something which points to '\0' and hope the symbol reading
878 code does something reasonable. */
881 else if (symbol
.n_sclass
& 0x80)
884 ((struct coff_symfile_info
*) objfile
->sym_private
)->debugsec
887 coff_data (objfile
->obfd
)->local_symesz
;
892 complaint (&symfile_complaints
, "Unexpected symbol continuation");
894 /* Return something which points to '\0' and hope the symbol reading
895 code does something reasonable. */
901 /* Read symbols for a given partial symbol table. */
904 read_xcoff_symtab (struct partial_symtab
*pst
)
906 struct objfile
*objfile
= pst
->objfile
;
907 bfd
*abfd
= objfile
->obfd
;
908 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
909 char *strtbl
= ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
;
911 ((struct coff_symfile_info
*) objfile
->sym_private
)->debugsec
;
912 char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
914 struct internal_syment symbol
[1];
915 union internal_auxent main_aux
;
916 struct coff_symbol cs
[1];
917 CORE_ADDR file_start_addr
= 0;
918 CORE_ADDR file_end_addr
= 0;
920 int next_file_symnum
= -1;
921 unsigned int max_symnum
;
922 int just_started
= 1;
924 int fcn_start_addr
= 0;
926 struct coff_symbol fcn_stab_saved
;
928 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
929 union internal_auxent fcn_aux_saved
;
930 struct context_stack
*new;
932 char *filestring
= " _start_ "; /* Name of the current file. */
934 char *last_csect_name
; /* last seen csect's name and value */
935 CORE_ADDR last_csect_val
;
938 this_symtab_psymtab
= pst
;
940 /* Get the appropriate COFF "constants" related to the file we're
942 local_symesz
= coff_data (abfd
)->local_symesz
;
944 last_source_file
= NULL
;
949 start_symtab (filestring
, (char *) NULL
, file_start_addr
);
950 record_debugformat (debugfmt
);
951 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
953 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
954 first_object_file_end
= 0;
957 ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
958 + symnum
* local_symesz
;
960 while (symnum
< max_symnum
)
963 QUIT
; /* make this command interruptable. */
965 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
966 /* read one symbol into `cs' structure. After processing the
967 whole symbol table, only string table will be kept in memory,
968 symbol table and debug section of xcoff will be freed. Thus
969 we can mark symbols with names in string table as
974 /* Swap and align the symbol into a reasonable C structure. */
975 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
977 cs
->c_symnum
= symnum
;
978 cs
->c_naux
= symbol
->n_numaux
;
979 if (symbol
->n_zeroes
)
982 /* We must use the original, unswapped, name here so the name field
983 pointed to by cs->c_name will persist throughout xcoffread. If
984 we use the new field, it gets overwritten for each symbol. */
985 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
986 /* If it's exactly E_SYMNMLEN characters long it isn't
988 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
991 p
= obstack_alloc (&objfile
->symbol_obstack
, E_SYMNMLEN
+ 1);
992 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
993 p
[E_SYMNMLEN
] = '\0';
998 else if (symbol
->n_sclass
& 0x80)
1000 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1001 symname_alloced
= 0;
1005 /* in string table */
1006 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1007 symname_alloced
= 1;
1009 cs
->c_value
= symbol
->n_value
;
1010 cs
->c_sclass
= symbol
->n_sclass
;
1011 cs
->c_secnum
= symbol
->n_scnum
;
1012 cs
->c_type
= (unsigned) symbol
->n_type
;
1014 raw_symbol
+= local_symesz
;
1017 /* Save addr of first aux entry. */
1018 raw_auxptr
= raw_symbol
;
1020 /* Skip all the auxents associated with this symbol. */
1021 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1023 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1028 /* if symbol name starts with ".$" or "$", ignore it. */
1029 if (cs
->c_name
[0] == '$'
1030 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1033 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1035 if (last_source_file
)
1038 end_symtab (cur_src_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1043 start_symtab ("_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1044 record_debugformat (debugfmt
);
1045 cur_src_end_addr
= first_object_file_end
;
1046 /* done with all files, everything from here on is globals */
1049 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1052 /* Dealing with a symbol with a csect entry. */
1054 #define CSECT(PP) ((PP)->x_csect)
1055 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1056 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1057 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1058 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1060 /* Convert the auxent to something we can access. */
1061 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1062 0, cs
->c_naux
, &main_aux
);
1064 switch (CSECT_SMTYP (&main_aux
))
1068 /* Ignore all external references. */
1072 /* A section description. */
1074 switch (CSECT_SCLAS (&main_aux
))
1080 /* A program csect is seen. We have to allocate one
1081 symbol table for each program csect. Normally gdb
1082 prefers one symtab for each source file. In case
1083 of AIX, one source file might include more than one
1084 [PR] csect, and they don't have to be adjacent in
1085 terms of the space they occupy in memory. Thus, one
1086 single source file might get fragmented in the
1087 memory and gdb's file start and end address
1088 approach does not work! GCC (and I think xlc) seem
1089 to put all the code in the unnamed program csect. */
1091 if (last_csect_name
)
1093 complete_symtab (filestring
, file_start_addr
);
1094 cur_src_end_addr
= file_end_addr
;
1095 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1098 /* Give all csects for this source file the same
1100 start_symtab (filestring
, NULL
, (CORE_ADDR
) 0);
1101 record_debugformat (debugfmt
);
1104 /* If this is the very first csect seen,
1105 basically `__start'. */
1108 first_object_file_end
1109 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1114 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1115 SECT_OFF_TEXT (objfile
));
1116 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1118 if (cs
->c_name
&& (cs
->c_name
[0] == '.'
1119 || cs
->c_name
[0] == '@'))
1121 last_csect_name
= cs
->c_name
;
1122 last_csect_val
= cs
->c_value
;
1123 last_csect_sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1128 /* All other symbols are put into the minimal symbol
1141 /* Ignore the symbol. */
1149 switch (CSECT_SCLAS (&main_aux
))
1152 /* a function entry point. */
1153 function_entry_point
:
1155 fcn_start_addr
= cs
->c_value
;
1157 /* save the function header info, which will be used
1158 when `.bf' is seen. */
1160 fcn_aux_saved
= main_aux
;
1164 /* shared library function trampoline code entry point. */
1168 /* The symbols often have the same names as debug symbols for
1169 functions, and confuse lookup_symbol. */
1173 /* xlc puts each variable in a separate csect, so we get
1174 an XTY_SD for each variable. But gcc puts several
1175 variables in a csect, so that each variable only gets
1176 an XTY_LD. This will typically be XMC_RW; I suspect
1177 XMC_RO and XMC_BS might be possible too.
1178 These variables are put in the minimal symbol table
1185 /* Common symbols are put into the minimal symbol table only. */
1193 /* If explicitly specified as a function, treat is as one. This check
1194 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1195 after the above CSECT check. */
1196 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1198 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1199 0, cs
->c_naux
, &main_aux
);
1200 goto function_entry_point
;
1203 switch (cs
->c_sclass
)
1208 /* c_value field contains symnum of next .file entry in table
1209 or symnum of first global after last .file. */
1211 next_file_symnum
= cs
->c_value
;
1213 /* Complete symbol table for last object file containing
1214 debugging information. */
1216 /* Whether or not there was a csect in the previous file, we
1217 have to call `end_stabs' and `start_stabs' to reset
1218 type_vector, line_vector, etc. structures. */
1220 complete_symtab (filestring
, file_start_addr
);
1221 cur_src_end_addr
= file_end_addr
;
1222 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1225 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1226 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1227 standard COFF way and put it in the auxent. We use the auxent if
1228 the symbol is ".file" and an auxent exists, otherwise use the symbol
1229 itself. Simple enough. */
1230 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1232 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1233 0, cs
->c_naux
, &main_aux
);
1234 filestring
= coff_getfilename (&main_aux
, objfile
);
1237 filestring
= cs
->c_name
;
1240 start_symtab (filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1241 record_debugformat (debugfmt
);
1242 last_csect_name
= 0;
1244 /* reset file start and end addresses. A compilation unit with no text
1245 (only data) should have zero file boundaries. */
1246 file_start_addr
= file_end_addr
= 0;
1250 fcn_stab_saved
= *cs
;
1254 if (STREQ (cs
->c_name
, ".bf"))
1256 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1257 SECT_OFF_TEXT (objfile
));
1258 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1259 0, cs
->c_naux
, &main_aux
);
1261 within_function
= 1;
1263 new = push_context (0, fcn_start_addr
+ off
);
1265 new->name
= define_symbol
1266 (fcn_cs_saved
.c_value
+ off
,
1267 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1268 if (new->name
!= NULL
)
1269 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT (objfile
);
1271 else if (STREQ (cs
->c_name
, ".ef"))
1274 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1275 0, cs
->c_naux
, &main_aux
);
1277 /* The value of .ef is the address of epilogue code;
1278 not useful for gdb. */
1279 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1280 contains number of lines to '}' */
1282 if (context_stack_depth
<= 0)
1283 { /* We attempted to pop an empty context stack */
1284 ef_complaint (cs
->c_symnum
);
1285 within_function
= 0;
1288 new = pop_context ();
1289 /* Stack must be empty now. */
1290 if (context_stack_depth
> 0 || new == NULL
)
1292 ef_complaint (cs
->c_symnum
);
1293 within_function
= 0;
1297 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1299 (fcn_cs_saved
.c_value
1300 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1301 + ANOFFSET (objfile
->section_offsets
,
1302 SECT_OFF_TEXT (objfile
))),
1304 within_function
= 0;
1309 /* Begin static block. */
1311 struct internal_syment symbol
;
1313 read_symbol (&symbol
, cs
->c_value
);
1314 static_block_base
= symbol
.n_value
;
1315 static_block_section
=
1316 secnum_to_section (symbol
.n_scnum
, objfile
);
1321 /* End of static block. */
1322 static_block_base
= 0;
1323 static_block_section
= -1;
1334 complaint (&symfile_complaints
, "Unrecognized storage class %d.",
1349 /* beginning of include file */
1350 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1351 order. Thus, when wee see them, we might not know enough info
1352 to process them. Thus, we'll be saving them into a table
1353 (inclTable) and postpone their processing. */
1355 record_include_begin (cs
);
1359 /* End of include file. */
1360 /* See the comment after case C_BINCL. */
1361 record_include_end (cs
);
1365 if (STREQ (cs
->c_name
, ".bb"))
1368 new = push_context (depth
,
1370 + ANOFFSET (objfile
->section_offsets
,
1371 SECT_OFF_TEXT (objfile
))));
1373 else if (STREQ (cs
->c_name
, ".eb"))
1375 if (context_stack_depth
<= 0)
1376 { /* We attempted to pop an empty context stack */
1377 eb_complaint (cs
->c_symnum
);
1380 new = pop_context ();
1381 if (depth
-- != new->depth
)
1383 eb_complaint (cs
->c_symnum
);
1386 if (local_symbols
&& context_stack_depth
> 0)
1388 /* Make a block for the local symbols within. */
1389 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1392 + ANOFFSET (objfile
->section_offsets
,
1393 SECT_OFF_TEXT (objfile
))),
1396 local_symbols
= new->locals
;
1401 process_xcoff_symbol (cs
, objfile
);
1406 if (last_source_file
)
1410 complete_symtab (filestring
, file_start_addr
);
1411 cur_src_end_addr
= file_end_addr
;
1412 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1413 /* When reading symbols for the last C_FILE of the objfile, try
1414 to make sure that we set pst->symtab to the symtab for the
1415 file, not to the _globals_ symtab. I'm not sure whether this
1416 actually works right or when/if it comes up. */
1417 if (pst
->symtab
== NULL
)
1423 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1424 (SYMBOL2) = (struct symbol *) \
1425 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1426 *(SYMBOL2) = *(SYMBOL1);
1429 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1430 (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->symbol_obstack);
1433 static struct type
*func_symbol_type
;
1434 static struct type
*var_symbol_type
;
1436 /* process one xcoff symbol. */
1438 static struct symbol
*
1439 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1441 struct symbol onesymbol
;
1442 struct symbol
*sym
= &onesymbol
;
1443 struct symbol
*sym2
= NULL
;
1449 if (cs
->c_secnum
< 0)
1451 /* The value is a register number, offset within a frame, etc.,
1452 and does not get relocated. */
1458 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1459 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1466 memset (sym
, '\0', sizeof (struct symbol
));
1468 /* default assumptions */
1469 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1470 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1471 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1473 if (ISFCN (cs
->c_type
))
1475 /* At this point, we don't know the type of the function. This
1476 will be patched with the type from its stab entry later on in
1477 patch_block_stabs (), unless the file was compiled without -g. */
1479 DEPRECATED_SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1480 SYMBOL_TYPE (sym
) = func_symbol_type
;
1482 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1483 SYMBOL_DUP (sym
, sym2
);
1485 if (cs
->c_sclass
== C_EXT
)
1486 add_symbol_to_list (sym2
, &global_symbols
);
1487 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1488 add_symbol_to_list (sym2
, &file_symbols
);
1492 /* In case we can't figure out the type, provide default. */
1493 SYMBOL_TYPE (sym
) = var_symbol_type
;
1495 switch (cs
->c_sclass
)
1498 /* The values of functions and global symbols are now resolved
1499 via the global_sym_chain in stabsread.c. */
1501 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1502 add_stab_to_list (name
, &global_stabs
);
1504 add_stab_to_list (name
, &file_stabs
);
1508 add_stab_to_list (name
, &global_stabs
);
1513 common_block_start (cs
->c_name
, objfile
);
1517 common_block_end (objfile
);
1521 complaint (&symfile_complaints
, "Unexpected storage class: %d",
1534 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1537 SYMBOL_SECTION (sym
) = sec
;
1544 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1545 all statics and we need to distinguish file-scope versus
1546 function-scope using within_function. We do this by
1547 changing the string we pass to define_symbol to use 'S'
1548 where we need to, which is not necessarily super-clean,
1549 but seems workable enough. */
1551 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1555 if (*pp
== 'V' && !within_function
)
1557 sym
= define_symbol ((cs
->c_value
1558 + ANOFFSET (objfile
->section_offsets
,
1559 static_block_section
)),
1560 cs
->c_name
, 0, 0, objfile
);
1563 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1564 SYMBOL_SECTION (sym
) = static_block_section
;
1573 /* Extract the file name from the aux entry of a C_FILE symbol.
1574 Result is in static storage and is only good for temporary use. */
1577 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1579 static char buffer
[BUFSIZ
];
1581 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1583 ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
1584 + aux_entry
->x_file
.x_n
.x_offset
);
1587 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1588 buffer
[FILNMLEN
] = '\0';
1593 /* Set *SYMBOL to symbol number symno in symtbl. */
1595 read_symbol (struct internal_syment
*symbol
, int symno
)
1598 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->sym_private
)
1601 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->sym_private
)
1603 if (symno
< 0 || symno
>= nsyms
)
1605 complaint (&symfile_complaints
, "Invalid symbol offset");
1606 symbol
->n_value
= 0;
1607 symbol
->n_scnum
= -1;
1610 bfd_coff_swap_sym_in (this_symtab_psymtab
->objfile
->obfd
,
1611 stbl
+ (symno
* local_symesz
),
1615 /* Get value corresponding to symbol number symno in symtbl. */
1618 read_symbol_nvalue (int symno
)
1620 struct internal_syment symbol
[1];
1622 read_symbol (symbol
, symno
);
1623 return symbol
->n_value
;
1627 /* Find the address of the function corresponding to symno, where
1628 symno is the symbol pointed to by the linetable. */
1631 read_symbol_lineno (int symno
)
1633 struct objfile
*objfile
= this_symtab_psymtab
->objfile
;
1634 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1636 struct coff_symfile_info
*info
=
1637 (struct coff_symfile_info
*)objfile
->sym_private
;
1638 int nsyms
= info
->symtbl_num_syms
;
1639 char *stbl
= info
->symtbl
;
1640 char *strtbl
= info
->strtbl
;
1642 struct internal_syment symbol
[1];
1643 union internal_auxent main_aux
[1];
1647 bf_notfound_complaint ();
1651 /* Note that just searching for a short distance (e.g. 50 symbols)
1652 is not enough, at least in the following case.
1655 [many .stabx entries]
1656 [a few functions, referring to foo]
1660 What happens here is that the assembler moves the .stabx entries
1661 to right before the ".bf" for foo, but the symbol for "foo" is before
1662 all the stabx entries. See PR gdb/2222. */
1664 /* Maintaining a table of .bf entries might be preferable to this search.
1665 If I understand things correctly it would need to be done only for
1666 the duration of a single psymtab to symtab conversion. */
1667 while (symno
< nsyms
)
1669 bfd_coff_swap_sym_in (symfile_bfd
,
1670 stbl
+ (symno
* local_symesz
), symbol
);
1671 if (symbol
->n_sclass
== C_FCN
)
1673 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1674 if (STREQ (name
, ".bf"))
1677 symno
+= symbol
->n_numaux
+ 1;
1680 bf_notfound_complaint ();
1684 /* take aux entry and return its lineno */
1686 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1687 symbol
->n_type
, symbol
->n_sclass
,
1688 0, symbol
->n_numaux
, main_aux
);
1690 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1693 /* Support for line number handling */
1695 /* This function is called for every section; it finds the outer limits
1696 * of the line table (minimum and maximum file offset) so that the
1697 * mainline code can read the whole thing for efficiency.
1700 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1702 struct coff_symfile_info
*info
;
1704 file_ptr offset
, maxoff
;
1706 count
= asect
->lineno_count
;
1708 if (!STREQ (asect
->name
, ".text") || count
== 0)
1711 size
= count
* coff_data (abfd
)->local_linesz
;
1712 info
= (struct coff_symfile_info
*) vpinfo
;
1713 offset
= asect
->line_filepos
;
1714 maxoff
= offset
+ size
;
1716 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1717 info
->min_lineno_offset
= offset
;
1719 if (maxoff
> info
->max_lineno_offset
)
1720 info
->max_lineno_offset
= maxoff
;
1723 static void xcoff_psymtab_to_symtab_1 (struct partial_symtab
*);
1726 xcoff_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
1728 struct cleanup
*old_chain
;
1737 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1742 /* Read in all partial symtabs on which this one is dependent */
1743 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1744 if (!pst
->dependencies
[i
]->readin
)
1746 /* Inform about additional files that need to be read in. */
1749 fputs_filtered (" ", gdb_stdout
);
1751 fputs_filtered ("and ", gdb_stdout
);
1753 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1754 wrap_here (""); /* Flush output */
1755 gdb_flush (gdb_stdout
);
1757 xcoff_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1760 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1762 /* Init stuff necessary for reading in symbols. */
1765 old_chain
= make_cleanup (really_free_pendings
, 0);
1767 read_xcoff_symtab (pst
);
1769 do_cleanups (old_chain
);
1775 static void xcoff_psymtab_to_symtab (struct partial_symtab
*);
1777 /* Read in all of the symbols for a given psymtab for real.
1778 Be verbose about it if the user wants that. */
1781 xcoff_psymtab_to_symtab (struct partial_symtab
*pst
)
1791 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1796 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0
1797 || pst
->number_of_dependencies
)
1799 /* Print the message now, before reading the string table,
1800 to avoid disconcerting pauses. */
1803 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1804 gdb_flush (gdb_stdout
);
1807 sym_bfd
= pst
->objfile
->obfd
;
1809 next_symbol_text_func
= xcoff_next_symbol_text
;
1811 xcoff_psymtab_to_symtab_1 (pst
);
1813 /* Match with global symbols. This only needs to be done once,
1814 after all of the symtabs and dependencies have been read in. */
1815 scan_file_globals (pst
->objfile
);
1817 /* Finish up the debug error message. */
1819 printf_filtered ("done.\n");
1824 xcoff_new_init (struct objfile
*objfile
)
1826 stabsread_new_init ();
1827 buildsym_new_init ();
1830 /* Do initialization in preparation for reading symbols from OBJFILE.
1832 We will only be called if this is an XCOFF or XCOFF-like file.
1833 BFD handles figuring out the format of the file, and code in symfile.c
1834 uses BFD's determination to vector to us. */
1837 xcoff_symfile_init (struct objfile
*objfile
)
1839 /* Allocate struct to keep track of the symfile */
1840 objfile
->sym_private
= xmmalloc (objfile
->md
,
1841 sizeof (struct coff_symfile_info
));
1843 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1844 find this causes a significant slowdown in gdb then we could
1845 set it in the debug symbol readers only when necessary. */
1846 objfile
->flags
|= OBJF_REORDERED
;
1848 init_entry_point_info (objfile
);
1851 /* Perform any local cleanups required when we are done with a particular
1852 objfile. I.E, we are in the process of discarding all symbol information
1853 for an objfile, freeing up all memory held for it, and unlinking the
1854 objfile struct from the global list of known objfiles. */
1857 xcoff_symfile_finish (struct objfile
*objfile
)
1859 if (objfile
->sym_private
!= NULL
)
1861 xmfree (objfile
->md
, objfile
->sym_private
);
1864 /* Start with a fresh include table for the next objfile. */
1870 inclIndx
= inclLength
= inclDepth
= 0;
1875 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1879 unsigned char lengthbuf
[4];
1882 ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
= NULL
;
1884 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1885 error ("cannot seek to string table in %s: %s",
1886 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1888 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1889 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1891 /* If no string table is needed, then the file may end immediately
1892 after the symbols. Just return with `strtbl' set to NULL. */
1894 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1897 /* Allocate string table from symbol_obstack. We will need this table
1898 as long as we have its symbol table around. */
1900 strtbl
= (char *) obstack_alloc (&objfile
->symbol_obstack
, length
);
1901 ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
= strtbl
;
1903 /* Copy length buffer, the first byte is usually zero and is
1904 used for stabs with a name length of zero. */
1905 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1906 if (length
== sizeof lengthbuf
)
1909 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1911 if (val
!= length
- sizeof lengthbuf
)
1912 error ("cannot read string table from %s: %s",
1913 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1914 if (strtbl
[length
- 1] != '\0')
1915 error ("bad symbol file: string table does not end with null character");
1920 /* If we have not yet seen a function for this psymtab, this is 0. If we
1921 have seen one, it is the offset in the line numbers of the line numbers
1923 static unsigned int first_fun_line_offset
;
1925 static struct partial_symtab
*xcoff_start_psymtab
1926 (struct objfile
*, char *, int,
1927 struct partial_symbol
**, struct partial_symbol
**);
1929 /* Allocate and partially fill a partial symtab. It will be
1930 completely filled at the end of the symbol list.
1932 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1933 is the address relative to which its symbols are (incremental) or 0
1936 static struct partial_symtab
*
1937 xcoff_start_psymtab (struct objfile
*objfile
, char *filename
, int first_symnum
,
1938 struct partial_symbol
**global_syms
,
1939 struct partial_symbol
**static_syms
)
1941 struct partial_symtab
*result
=
1942 start_psymtab_common (objfile
, objfile
->section_offsets
,
1944 /* We fill in textlow later. */
1946 global_syms
, static_syms
);
1948 result
->read_symtab_private
= (char *)
1949 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
1950 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1951 result
->read_symtab
= xcoff_psymtab_to_symtab
;
1953 /* Deduce the source language from the filename for this psymtab. */
1954 psymtab_language
= deduce_language_from_filename (filename
);
1959 static struct partial_symtab
*xcoff_end_psymtab
1960 (struct partial_symtab
*, char **, int, int,
1961 struct partial_symtab
**, int, int);
1963 /* Close off the current usage of PST.
1964 Returns PST, or NULL if the partial symtab was empty and thrown away.
1966 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1968 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1969 are the information for includes and dependencies. */
1971 static struct partial_symtab
*
1972 xcoff_end_psymtab (struct partial_symtab
*pst
, char **include_list
,
1973 int num_includes
, int capping_symbol_number
,
1974 struct partial_symtab
**dependency_list
,
1975 int number_dependencies
, int textlow_not_set
)
1978 struct objfile
*objfile
= pst
->objfile
;
1980 if (capping_symbol_number
!= -1)
1981 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
1982 capping_symbol_number
1983 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1984 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
1985 first_fun_line_offset
;
1986 first_fun_line_offset
= 0;
1987 pst
->n_global_syms
=
1988 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
1989 pst
->n_static_syms
=
1990 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
1992 pst
->number_of_dependencies
= number_dependencies
;
1993 if (number_dependencies
)
1995 pst
->dependencies
= (struct partial_symtab
**)
1996 obstack_alloc (&objfile
->psymbol_obstack
,
1997 number_dependencies
* sizeof (struct partial_symtab
*));
1998 memcpy (pst
->dependencies
, dependency_list
,
1999 number_dependencies
* sizeof (struct partial_symtab
*));
2002 pst
->dependencies
= 0;
2004 for (i
= 0; i
< num_includes
; i
++)
2006 struct partial_symtab
*subpst
=
2007 allocate_psymtab (include_list
[i
], objfile
);
2009 subpst
->section_offsets
= pst
->section_offsets
;
2010 subpst
->read_symtab_private
=
2011 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
2012 sizeof (struct symloc
));
2013 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2014 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2015 subpst
->textlow
= 0;
2016 subpst
->texthigh
= 0;
2018 /* We could save slight bits of space by only making one of these,
2019 shared by the entire set of include files. FIXME-someday. */
2020 subpst
->dependencies
= (struct partial_symtab
**)
2021 obstack_alloc (&objfile
->psymbol_obstack
,
2022 sizeof (struct partial_symtab
*));
2023 subpst
->dependencies
[0] = pst
;
2024 subpst
->number_of_dependencies
= 1;
2026 subpst
->globals_offset
=
2027 subpst
->n_global_syms
=
2028 subpst
->statics_offset
=
2029 subpst
->n_static_syms
= 0;
2033 subpst
->read_symtab
= pst
->read_symtab
;
2036 sort_pst_symbols (pst
);
2038 /* If there is already a psymtab or symtab for a file of this name,
2039 remove it. (If there is a symtab, more drastic things also
2040 happen.) This happens in VxWorks. */
2041 free_named_symtabs (pst
->filename
);
2043 if (num_includes
== 0
2044 && number_dependencies
== 0
2045 && pst
->n_global_syms
== 0
2046 && pst
->n_static_syms
== 0)
2048 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2049 it is on the obstack, but we can forget to chain it on the list. */
2050 /* Empty psymtabs happen as a result of header files which don't have
2051 any symbols in them. There can be a lot of them. */
2053 discard_psymtab (pst
);
2055 /* Indicate that psymtab was thrown away. */
2056 pst
= (struct partial_symtab
*) NULL
;
2061 static void swap_sym (struct internal_syment
*,
2062 union internal_auxent
*, char **, char **,
2063 unsigned int *, struct objfile
*);
2065 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2066 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2067 the symbol and its auxents. */
2070 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2071 char **name
, char **raw
, unsigned int *symnump
,
2072 struct objfile
*objfile
)
2074 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2075 if (symbol
->n_zeroes
)
2077 /* If it's exactly E_SYMNMLEN characters long it isn't
2079 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2081 /* FIXME: wastes memory for symbols which we don't end up putting
2082 into the minimal symbols. */
2084 p
= obstack_alloc (&objfile
->psymbol_obstack
, E_SYMNMLEN
+ 1);
2085 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2086 p
[E_SYMNMLEN
] = '\0';
2090 /* Point to the unswapped name as that persists as long as the
2092 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2094 else if (symbol
->n_sclass
& 0x80)
2096 *name
= ((struct coff_symfile_info
*) objfile
->sym_private
)->debugsec
2101 *name
= ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
2105 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2106 if (symbol
->n_numaux
> 0)
2108 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2109 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2111 *symnump
+= symbol
->n_numaux
;
2112 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2117 function_outside_compilation_unit_complaint (const char *arg1
)
2119 complaint (&symfile_complaints
,
2120 "function `%s' appears to be defined outside of all compilation units",
2125 scan_xcoff_symtab (struct objfile
*objfile
)
2127 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2128 char *filestring
= NULL
;
2131 int past_first_source_file
= 0;
2136 /* Current partial symtab */
2137 struct partial_symtab
*pst
;
2139 /* List of current psymtab's include files */
2140 char **psymtab_include_list
;
2141 int includes_allocated
;
2144 /* Index within current psymtab dependency list */
2145 struct partial_symtab
**dependency_list
;
2146 int dependencies_used
, dependencies_allocated
;
2149 struct internal_syment symbol
;
2150 union internal_auxent main_aux
[5];
2151 unsigned int ssymnum
;
2153 char *last_csect_name
= NULL
; /* last seen csect's name and value */
2154 CORE_ADDR last_csect_val
= 0;
2155 int last_csect_sec
= 0;
2156 int misc_func_recorded
= 0; /* true if any misc. function */
2157 int textlow_not_set
= 1;
2159 pst
= (struct partial_symtab
*) 0;
2161 includes_allocated
= 30;
2163 psymtab_include_list
= (char **) alloca (includes_allocated
*
2166 dependencies_allocated
= 30;
2167 dependencies_used
= 0;
2169 (struct partial_symtab
**) alloca (dependencies_allocated
*
2170 sizeof (struct partial_symtab
*));
2172 last_source_file
= NULL
;
2174 abfd
= objfile
->obfd
;
2176 sraw_symbol
= ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
;
2177 nsyms
= ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl_num_syms
;
2179 while (ssymnum
< nsyms
)
2185 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2186 sclass
= symbol
.n_sclass
;
2193 /* The CSECT auxent--always the last auxent. */
2194 union internal_auxent csect_aux
;
2195 unsigned int symnum_before
= ssymnum
;
2197 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2199 if (symbol
.n_numaux
> 1)
2201 bfd_coff_swap_aux_in
2203 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2206 symbol
.n_numaux
- 1,
2211 csect_aux
= main_aux
[0];
2213 /* If symbol name starts with ".$" or "$", ignore it. */
2214 if (namestring
[0] == '$'
2215 || (namestring
[0] == '.' && namestring
[1] == '$'))
2218 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2221 switch (csect_aux
.x_csect
.x_smclas
)
2224 if (last_csect_name
)
2226 /* If no misc. function recorded in the last
2227 seen csect, enter it as a function. This
2228 will take care of functions like strcmp()
2231 if (!misc_func_recorded
)
2233 RECORD_MINIMAL_SYMBOL
2234 (last_csect_name
, last_csect_val
,
2235 mst_text
, last_csect_sec
,
2241 /* We have to allocate one psymtab for
2242 each program csect, because their text
2243 sections need not be adjacent. */
2245 (pst
, psymtab_include_list
, includes_used
,
2246 symnum_before
, dependency_list
,
2247 dependencies_used
, textlow_not_set
);
2249 dependencies_used
= 0;
2250 /* Give all psymtabs for this source file the same
2252 pst
= xcoff_start_psymtab
2256 objfile
->global_psymbols
.next
,
2257 objfile
->static_psymbols
.next
);
2260 /* Activate the misc_func_recorded mechanism for
2261 compiler- and linker-generated CSECTs like ".strcmp"
2263 if (namestring
&& (namestring
[0] == '.'
2264 || namestring
[0] == '@'))
2266 last_csect_name
= namestring
;
2267 last_csect_val
= symbol
.n_value
;
2269 secnum_to_section (symbol
.n_scnum
, objfile
);
2274 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2275 if (highval
> pst
->texthigh
)
2276 pst
->texthigh
= highval
;
2277 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2278 pst
->textlow
= symbol
.n_value
;
2280 misc_func_recorded
= 0;
2285 /* Data variables are recorded in the minimal symbol
2286 table, except for section symbols. */
2287 if (*namestring
!= '.')
2288 prim_record_minimal_symbol_and_info
2289 (namestring
, symbol
.n_value
,
2290 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2291 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2297 warning ("More than one XMC_TC0 symbol found.");
2298 toc_offset
= symbol
.n_value
;
2300 /* Make TOC offset relative to start address of section. */
2301 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2303 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2307 /* These symbols tell us where the TOC entry for a
2308 variable is, not the variable itself. */
2317 switch (csect_aux
.x_csect
.x_smclas
)
2320 /* A function entry point. */
2322 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2323 first_fun_line_offset
=
2324 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2325 RECORD_MINIMAL_SYMBOL
2326 (namestring
, symbol
.n_value
,
2327 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2328 secnum_to_section (symbol
.n_scnum
, objfile
),
2333 /* shared library function trampoline code entry
2336 /* record trampoline code entries as
2337 mst_solib_trampoline symbol. When we lookup mst
2338 symbols, we will choose mst_text over
2339 mst_solib_trampoline. */
2340 RECORD_MINIMAL_SYMBOL
2341 (namestring
, symbol
.n_value
,
2342 mst_solib_trampoline
,
2343 secnum_to_section (symbol
.n_scnum
, objfile
),
2348 /* The symbols often have the same names as
2349 debug symbols for functions, and confuse
2355 /* xlc puts each variable in a separate csect,
2356 so we get an XTY_SD for each variable. But
2357 gcc puts several variables in a csect, so
2358 that each variable only gets an XTY_LD. We
2359 still need to record them. This will
2360 typically be XMC_RW; I suspect XMC_RO and
2361 XMC_BS might be possible too. */
2362 if (*namestring
!= '.')
2363 prim_record_minimal_symbol_and_info
2364 (namestring
, symbol
.n_value
,
2365 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2366 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2373 switch (csect_aux
.x_csect
.x_smclas
)
2377 /* Common variables are recorded in the minimal symbol
2378 table, except for section symbols. */
2379 if (*namestring
!= '.')
2380 prim_record_minimal_symbol_and_info
2381 (namestring
, symbol
.n_value
,
2382 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2383 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2396 unsigned int symnum_before
;
2398 symnum_before
= ssymnum
;
2399 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2402 /* See if the last csect needs to be recorded. */
2404 if (last_csect_name
&& !misc_func_recorded
)
2407 /* If no misc. function recorded in the last seen csect, enter
2408 it as a function. This will take care of functions like
2409 strcmp() compiled by xlc. */
2411 RECORD_MINIMAL_SYMBOL
2412 (last_csect_name
, last_csect_val
,
2413 mst_text
, last_csect_sec
, objfile
);
2418 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2419 symnum_before
, dependency_list
,
2420 dependencies_used
, textlow_not_set
);
2422 dependencies_used
= 0;
2424 first_fun_line_offset
= 0;
2426 /* XCOFF, according to the AIX 3.2 documentation, puts the
2427 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2428 do things the standard COFF way and put it in the auxent.
2429 We use the auxent if the symbol is ".file" and an auxent
2430 exists, otherwise use the symbol itself. */
2431 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2433 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2436 filestring
= namestring
;
2438 pst
= xcoff_start_psymtab (objfile
,
2441 objfile
->global_psymbols
.next
,
2442 objfile
->static_psymbols
.next
);
2443 last_csect_name
= NULL
;
2449 complaint (&symfile_complaints
,
2450 "Storage class %d not recognized during scan", sclass
);
2454 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2455 to handle only the C_FUN and C_EXT. */
2470 /* C_EINCL means we are switching back to the main file. But there
2471 is no reason to care; the only thing we want to know about
2472 includes is the names of all the included (.h) files. */
2477 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2481 /* I don't think the name of the common block (as opposed to the
2482 variables within it) is something which is user visible
2490 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2491 so C_LSYM would appear to be only for locals. */
2497 /* We probably could save a few instructions by assuming that
2498 C_LSYM, C_PSYM, etc., never have auxents. */
2499 int naux1
= symbol
.n_numaux
+ 1;
2501 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2507 /* Mark down an include file in the current psymtab */
2508 enum language tmp_language
;
2509 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2512 tmp_language
= deduce_language_from_filename (namestring
);
2514 /* Only change the psymtab's language if we've learned
2515 something useful (eg. tmp_language is not language_unknown).
2516 In addition, to match what start_subfile does, never change
2518 if (tmp_language
!= language_unknown
2519 && (tmp_language
!= language_c
2520 || psymtab_language
!= language_cplus
))
2521 psymtab_language
= tmp_language
;
2523 /* In C++, one may expect the same filename to come round many
2524 times, when code is coming alternately from the main file
2525 and from inline functions in other files. So I check to see
2526 if this is a file we've seen before -- either the main
2527 source file, or a previously included file.
2529 This seems to be a lot of time to be spending on N_SOL, but
2530 things like "break c-exp.y:435" need to work (I
2531 suppose the psymtab_include_list could be hashed or put
2532 in a binary tree, if profiling shows this is a major hog). */
2533 if (pst
&& STREQ (namestring
, pst
->filename
))
2537 for (i
= 0; i
< includes_used
; i
++)
2538 if (STREQ (namestring
, psymtab_include_list
[i
]))
2546 psymtab_include_list
[includes_used
++] = namestring
;
2547 if (includes_used
>= includes_allocated
)
2549 char **orig
= psymtab_include_list
;
2551 psymtab_include_list
= (char **)
2552 alloca ((includes_allocated
*= 2) *
2554 memcpy (psymtab_include_list
, orig
,
2555 includes_used
* sizeof (char *));
2560 /* The value of the C_FUN is not the address of the function (it
2561 appears to be the address before linking), but as long as it
2562 is smaller than the actual address, then find_pc_partial_function
2563 will use the minimal symbols instead. I hope. */
2571 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2574 p
= (char *) strchr (namestring
, ':');
2576 continue; /* Not a debugging symbol. */
2578 /* Main processing section for debugging symbols which
2579 the initial read through the symbol tables needs to worry
2580 about. If we reach this point, the symbol which we are
2581 considering is definitely one we are interested in.
2582 p must also contain the (valid) index into the namestring
2583 which indicates the debugging type symbol. */
2588 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
2589 #ifdef STATIC_TRANSFORM_NAME
2590 namestring
= STATIC_TRANSFORM_NAME (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
);
2759 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2760 add_psymbol_to_list (namestring
, p
- namestring
,
2761 VAR_DOMAIN
, LOC_BLOCK
,
2762 &objfile
->global_psymbols
,
2764 psymtab_language
, objfile
);
2767 /* Two things show up here (hopefully); static symbols of
2768 local scope (static used inside braces) or extensions
2769 of structure symbols. We can ignore both. */
2783 case '#': /* for symbol identification (used in live ranges) */
2787 /* It is a C++ nested symbol. We don't need to record it
2788 (I don't think); if we try to look up foo::bar::baz,
2789 then symbols for the symtab containing foo should get
2790 read in, I think. */
2791 /* Someone says sun cc puts out symbols like
2792 /foo/baz/maclib::/usr/local/bin/maclib,
2793 which would get here with a symbol type of ':'. */
2797 /* Unexpected symbol descriptor. The second and subsequent stabs
2798 of a continued stab can show up here. The question is
2799 whether they ever can mimic a normal stab--it would be
2800 nice if not, since we certainly don't want to spend the
2801 time searching to the end of every string looking for
2804 complaint (&symfile_complaints
,
2805 "unknown symbol descriptor `%c'", p
[1]);
2807 /* Ignore it; perhaps it is an extension that we don't
2817 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2818 ssymnum
, dependency_list
,
2819 dependencies_used
, textlow_not_set
);
2822 /* Record the toc offset value of this symbol table into objfile structure.
2823 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2824 this information would be file auxiliary header. */
2826 ((struct coff_symfile_info
*) objfile
->sym_private
)->toc_offset
= toc_offset
;
2829 /* Return the toc offset value for a given objfile. */
2832 get_toc_offset (struct objfile
*objfile
)
2835 return ((struct coff_symfile_info
*) objfile
->sym_private
)->toc_offset
;
2839 /* Scan and build partial symbols for a symbol file.
2840 We have been initialized by a call to dbx_symfile_init, which
2841 put all the relevant info into a "struct dbx_symfile_info",
2842 hung off the objfile structure.
2844 SECTION_OFFSETS contains offsets relative to which the symbols in the
2845 various sections are (depending where the sections were actually loaded).
2846 MAINLINE is true if we are reading the main symbol
2847 table (as opposed to a shared lib or dynamically loaded file). */
2850 xcoff_initial_scan (struct objfile
*objfile
, int mainline
)
2854 struct cleanup
*back_to
;
2855 int num_symbols
; /* # of symbols */
2856 file_ptr symtab_offset
; /* symbol table and */
2857 file_ptr stringtab_offset
; /* string table file offsets */
2858 struct coff_symfile_info
*info
;
2862 info
= (struct coff_symfile_info
*) objfile
->sym_private
;
2863 symfile_bfd
= abfd
= objfile
->obfd
;
2864 name
= objfile
->name
;
2866 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2867 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2868 stringtab_offset
= symtab_offset
+
2869 num_symbols
* coff_data (abfd
)->local_symesz
;
2871 info
->min_lineno_offset
= 0;
2872 info
->max_lineno_offset
= 0;
2873 bfd_map_over_sections (abfd
, find_linenos
, info
);
2875 if (num_symbols
> 0)
2877 /* Read the string table. */
2878 init_stringtab (abfd
, stringtab_offset
, objfile
);
2880 /* Read the .debug section, if present. */
2882 struct bfd_section
*secp
;
2883 bfd_size_type length
;
2884 char *debugsec
= NULL
;
2886 secp
= bfd_get_section_by_name (abfd
, ".debug");
2889 length
= bfd_section_size (abfd
, secp
);
2893 (char *) obstack_alloc (&objfile
->symbol_obstack
, length
);
2895 if (!bfd_get_section_contents (abfd
, secp
, debugsec
,
2896 (file_ptr
) 0, length
))
2898 error ("Error reading .debug section of `%s': %s",
2899 name
, bfd_errmsg (bfd_get_error ()));
2903 ((struct coff_symfile_info
*) objfile
->sym_private
)->debugsec
=
2908 /* Read the symbols. We keep them in core because we will want to
2909 access them randomly in read_symbol*. */
2910 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2912 error ("Error reading symbols from %s: %s",
2913 name
, bfd_errmsg (bfd_get_error ()));
2914 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2915 ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
=
2916 obstack_alloc (&objfile
->symbol_obstack
, size
);
2917 ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl_num_syms
=
2920 val
= bfd_bread (((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
,
2923 perror_with_name ("reading symbol table");
2925 /* If we are reinitializing, or if we have never loaded syms yet, init */
2927 || (objfile
->global_psymbols
.size
== 0
2928 && objfile
->static_psymbols
.size
== 0))
2929 /* I'm not sure how how good num_symbols is; the rule of thumb in
2930 init_psymbol_list was developed for a.out. On the one hand,
2931 num_symbols includes auxents. On the other hand, it doesn't
2933 init_psymbol_list (objfile
, num_symbols
);
2935 free_pending_blocks ();
2936 back_to
= make_cleanup (really_free_pendings
, 0);
2938 init_minimal_symbol_collection ();
2939 make_cleanup_discard_minimal_symbols ();
2941 /* Now that the symbol table data of the executable file are all in core,
2942 process them and define symbols accordingly. */
2944 scan_xcoff_symtab (objfile
);
2946 /* Install any minimal symbols that have been collected as the current
2947 minimal symbols for this objfile. */
2949 install_minimal_symbols (objfile
);
2951 do_cleanups (back_to
);
2955 xcoff_symfile_offsets (struct objfile
*objfile
, struct section_addr_info
*addrs
)
2957 asection
*sect
= NULL
;
2960 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
2961 objfile
->section_offsets
= (struct section_offsets
*)
2962 obstack_alloc (&objfile
->psymbol_obstack
,
2963 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
2965 /* Initialize the section indexes for future use. */
2966 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
2968 objfile
->sect_index_text
= sect
->index
;
2970 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
2972 objfile
->sect_index_data
= sect
->index
;
2974 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
2976 objfile
->sect_index_bss
= sect
->index
;
2978 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
2980 objfile
->sect_index_rodata
= sect
->index
;
2982 for (i
= 0; i
< objfile
->num_sections
; ++i
)
2984 /* syms_from_objfile kindly subtracts from addr the
2985 bfd_section_vma of the .text section. This strikes me as
2986 wrong--whether the offset to be applied to symbol reading is
2987 relative to the start address of the section depends on the
2988 symbol format. In any event, this whole "addr" concept is
2989 pretty broken (it doesn't handle any section but .text
2990 sensibly), so just ignore the addr parameter and use 0.
2991 rs6000-nat.c will set the correct section offsets via
2992 objfile_relocate. */
2993 (objfile
->section_offsets
)->offsets
[i
] = 0;
2997 /* Register our ability to parse symbols for xcoff BFD files. */
2999 static struct sym_fns xcoff_sym_fns
=
3002 /* It is possible that coff and xcoff should be merged as
3003 they do have fundamental similarities (for example, the extra storage
3004 classes used for stabs could presumably be recognized in any COFF file).
3005 However, in addition to obvious things like all the csect hair, there are
3006 some subtler differences between xcoffread.c and coffread.c, notably
3007 the fact that coffread.c has no need to read in all the symbols, but
3008 xcoffread.c reads all the symbols and does in fact randomly access them
3009 (in C_BSTAT and line number processing). */
3011 bfd_target_xcoff_flavour
,
3013 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3014 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3015 xcoff_initial_scan
, /* sym_read: read a symbol file into symtab */
3016 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
3017 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
3018 NULL
/* next: pointer to next struct sym_fns */
3022 _initialize_xcoffread (void)
3024 add_symtab_fns (&xcoff_sym_fns
);
3026 func_symbol_type
= init_type (TYPE_CODE_FUNC
, 1, 0,
3027 "<function, no debug info>", NULL
);
3028 TYPE_TARGET_TYPE (func_symbol_type
) = builtin_type_int
;
3030 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ HOST_CHAR_BIT
, 0,
3031 "<variable, no debug info>", NULL
);