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 if (strcmp (inclTable
[ii
].name
, last_source_file
) == 0)
605 /* The entry in the include table refers to the main source
606 file. Add the lines to the main subfile. */
608 main_source_baseline
= inclTable
[ii
].funStartLine
;
610 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
611 start
, 0, &main_source_baseline
);
612 inclTable
[ii
].subfile
= &main_subfile
;
617 /* Have a new subfile for the include file. */
619 tmpSubfile
= inclTable
[ii
].subfile
=
620 (struct subfile
*) xmalloc (sizeof (struct subfile
));
622 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
623 firstLine
= &(inclTable
[ii
].funStartLine
);
625 /* Enter include file's lines now. */
626 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
627 inclTable
[ii
].end
, start
, 0, firstLine
);
630 if (offset
<= inclTable
[ii
].end
)
631 offset
= inclTable
[ii
].end
+ linesz
;
634 /* All the include files' line have been processed at this point. Now,
635 enter remaining lines of the main file, if any left. */
636 if (offset
< max_offset
+ 1 - linesz
)
638 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
639 &main_source_baseline
);
643 /* Process main file's line numbers. */
644 if (main_subfile
.line_vector
)
646 struct linetable
*lineTb
, *lv
;
648 lv
= main_subfile
.line_vector
;
650 /* Line numbers are not necessarily ordered. xlc compilation will
651 put static function to the end. */
653 lineTb
= arrange_linetable (lv
);
656 current_subfile
->line_vector
= (struct linetable
*)
657 xrealloc (lv
, (sizeof (struct linetable
)
658 + lv
->nitems
* sizeof (struct linetable_entry
)));
663 current_subfile
->line_vector
= lineTb
;
666 current_subfile
->line_vector_length
=
667 current_subfile
->line_vector
->nitems
;
670 /* Now, process included files' line numbers. */
672 for (ii
= 0; ii
< inclIndx
; ++ii
)
674 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
675 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!! FIXMEmgo */
677 struct linetable
*lineTb
, *lv
;
679 lv
= (inclTable
[ii
].subfile
)->line_vector
;
681 /* Line numbers are not necessarily ordered. xlc compilation will
682 put static function to the end. */
684 lineTb
= arrange_linetable (lv
);
688 /* For the same include file, we might want to have more than one
689 subfile. This happens if we have something like:
697 while foo.h including code in it. (stupid but possible)
698 Since start_subfile() looks at the name and uses an
699 existing one if finds, we need to provide a fake name and
703 start_subfile (inclTable
[ii
].name
, (char *) 0);
706 /* Pick a fake name that will produce the same results as this
707 one when passed to deduce_language_from_filename. Kludge on
709 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
710 if (fakename
== NULL
)
712 start_subfile (fakename
, (char *) 0);
713 xfree (current_subfile
->name
);
715 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
720 current_subfile
->line_vector
=
721 (struct linetable
*) xrealloc
722 (lv
, (sizeof (struct linetable
)
723 + lv
->nitems
* sizeof (struct linetable_entry
)));
729 current_subfile
->line_vector
= lineTb
;
732 current_subfile
->line_vector_length
=
733 current_subfile
->line_vector
->nitems
;
734 start_subfile (pop_subfile (), (char *) 0);
738 return_after_cleanup
:
740 /* We don't want to keep alloc/free'ing the global include file table. */
743 /* Start with a fresh subfile structure for the next file. */
744 memset (&main_subfile
, '\0', sizeof (struct subfile
));
748 aix_process_linenos (void)
750 /* process line numbers and enter them into line vector */
751 process_linenos (last_source_start_addr
, cur_src_end_addr
);
755 /* Enter a given range of lines into the line vector.
756 can be called in the following two ways:
757 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
758 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
760 endoffset points to the last line table entry that we should pay
764 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
, unsigned endoffset
, /* offsets to line table */
765 CORE_ADDR startaddr
, /* offsets to line table */
766 CORE_ADDR endaddr
, unsigned *firstLine
)
768 struct objfile
*objfile
= this_symtab_psymtab
->objfile
;
769 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
770 unsigned int curoffset
;
773 struct internal_lineno int_lnno
;
774 unsigned int limit_offset
;
778 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
780 curoffset
= beginoffset
;
782 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)
787 if (endoffset
>= limit_offset
)
789 complaint (&symfile_complaints
,
790 _("Bad line table offset in C_EINCL directive"));
793 limit_offset
= endoffset
;
798 abfd
= objfile
->obfd
;
799 linesz
= coff_data (abfd
)->local_linesz
;
800 ext_lnno
= alloca (linesz
);
802 while (curoffset
<= limit_offset
)
804 bfd_seek (abfd
, curoffset
, SEEK_SET
);
805 bfd_bread (ext_lnno
, linesz
, abfd
);
806 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
808 /* Find the address this line represents. */
809 addr
= (int_lnno
.l_lnno
810 ? int_lnno
.l_addr
.l_paddr
811 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
812 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
814 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
817 if (int_lnno
.l_lnno
== 0)
819 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
820 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
824 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
825 gdbarch_addr_bits_remove (gdbarch
, addr
));
831 /* Save the vital information for use when closing off the current file.
832 NAME is the file name the symbols came from, START_ADDR is the first
833 text address for the file, and SIZE is the number of bytes of text. */
835 #define complete_symtab(name, start_addr) { \
836 last_source_file = xstrdup (name); \
837 last_source_start_addr = start_addr; \
841 /* Refill the symbol table input buffer
842 and set the variables that control fetching entries from it.
843 Reports an error if no data available.
844 This function can read past the end of the symbol table
845 (into the string table) but this does no harm. */
847 /* Reading symbol table has to be fast! Keep the followings as macros, rather
850 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
854 if (namestr[0] == '.') ++namestr; \
855 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
856 (SECTION), (asection *)NULL, (OBJFILE)); \
857 misc_func_recorded = 1; \
861 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
862 nested. At any given time, a symbol can only be in one static block.
863 This is the base address of current static block, zero if non exists. */
865 static int static_block_base
= 0;
867 /* Section number for the current static block. */
869 static int static_block_section
= -1;
871 /* true if space for symbol name has been allocated. */
873 static int symname_alloced
= 0;
875 /* Next symbol to read. Pointer into raw seething symbol table. */
877 static char *raw_symbol
;
879 /* This is the function which stabsread.c calls to get symbol
883 xcoff_next_symbol_text (struct objfile
*objfile
)
885 struct internal_syment symbol
;
887 /* FIXME: is this the same as the passed arg? */
888 if (this_symtab_psymtab
)
889 objfile
= this_symtab_psymtab
->objfile
;
891 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
894 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
896 /* Return something which points to '\0' and hope the symbol reading
897 code does something reasonable. */
900 else if (symbol
.n_sclass
& 0x80)
903 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
906 coff_data (objfile
->obfd
)->local_symesz
;
911 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
913 /* Return something which points to '\0' and hope the symbol reading
914 code does something reasonable. */
920 /* Read symbols for a given partial symbol table. */
923 read_xcoff_symtab (struct partial_symtab
*pst
)
925 struct objfile
*objfile
= pst
->objfile
;
926 bfd
*abfd
= objfile
->obfd
;
927 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
928 char *strtbl
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
;
930 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
;
931 char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
933 struct internal_syment symbol
[1];
934 union internal_auxent main_aux
;
935 struct coff_symbol cs
[1];
936 CORE_ADDR file_start_addr
= 0;
937 CORE_ADDR file_end_addr
= 0;
939 int next_file_symnum
= -1;
940 unsigned int max_symnum
;
941 int just_started
= 1;
943 int fcn_start_addr
= 0;
945 struct coff_symbol fcn_stab_saved
= { 0 };
947 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
948 union internal_auxent fcn_aux_saved
;
949 struct context_stack
*new;
951 char *filestring
= " _start_ "; /* Name of the current file. */
953 char *last_csect_name
; /* last seen csect's name and value */
954 CORE_ADDR last_csect_val
;
957 this_symtab_psymtab
= pst
;
959 /* Get the appropriate COFF "constants" related to the file we're
961 local_symesz
= coff_data (abfd
)->local_symesz
;
963 last_source_file
= NULL
;
968 start_symtab (filestring
, (char *) NULL
, file_start_addr
);
969 record_debugformat (debugfmt
);
970 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
972 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
973 first_object_file_end
= 0;
976 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
977 + symnum
* local_symesz
;
979 while (symnum
< max_symnum
)
982 QUIT
; /* make this command interruptable. */
984 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
985 /* read one symbol into `cs' structure. After processing the
986 whole symbol table, only string table will be kept in memory,
987 symbol table and debug section of xcoff will be freed. Thus
988 we can mark symbols with names in string table as
993 /* Swap and align the symbol into a reasonable C structure. */
994 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
996 cs
->c_symnum
= symnum
;
997 cs
->c_naux
= symbol
->n_numaux
;
998 if (symbol
->n_zeroes
)
1000 symname_alloced
= 0;
1001 /* We must use the original, unswapped, name here so the name field
1002 pointed to by cs->c_name will persist throughout xcoffread. If
1003 we use the new field, it gets overwritten for each symbol. */
1004 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1005 /* If it's exactly E_SYMNMLEN characters long it isn't
1007 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1010 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
1011 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1012 p
[E_SYMNMLEN
] = '\0';
1014 symname_alloced
= 1;
1017 else if (symbol
->n_sclass
& 0x80)
1019 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1020 symname_alloced
= 0;
1024 /* in string table */
1025 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1026 symname_alloced
= 1;
1028 cs
->c_value
= symbol
->n_value
;
1029 cs
->c_sclass
= symbol
->n_sclass
;
1030 cs
->c_secnum
= symbol
->n_scnum
;
1031 cs
->c_type
= (unsigned) symbol
->n_type
;
1033 raw_symbol
+= local_symesz
;
1036 /* Save addr of first aux entry. */
1037 raw_auxptr
= raw_symbol
;
1039 /* Skip all the auxents associated with this symbol. */
1040 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1042 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1047 /* if symbol name starts with ".$" or "$", ignore it. */
1048 if (cs
->c_name
[0] == '$'
1049 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1052 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1054 if (last_source_file
)
1057 end_symtab (cur_src_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1062 start_symtab ("_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1063 record_debugformat (debugfmt
);
1064 cur_src_end_addr
= first_object_file_end
;
1065 /* done with all files, everything from here on is globals */
1068 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1071 /* Dealing with a symbol with a csect entry. */
1073 #define CSECT(PP) ((PP)->x_csect)
1074 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1075 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1076 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1077 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1079 /* Convert the auxent to something we can access. */
1080 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1081 0, cs
->c_naux
, &main_aux
);
1083 switch (CSECT_SMTYP (&main_aux
))
1087 /* Ignore all external references. */
1091 /* A section description. */
1093 switch (CSECT_SCLAS (&main_aux
))
1099 /* A program csect is seen. We have to allocate one
1100 symbol table for each program csect. Normally gdb
1101 prefers one symtab for each source file. In case
1102 of AIX, one source file might include more than one
1103 [PR] csect, and they don't have to be adjacent in
1104 terms of the space they occupy in memory. Thus, one
1105 single source file might get fragmented in the
1106 memory and gdb's file start and end address
1107 approach does not work! GCC (and I think xlc) seem
1108 to put all the code in the unnamed program csect. */
1110 if (last_csect_name
)
1112 complete_symtab (filestring
, file_start_addr
);
1113 cur_src_end_addr
= file_end_addr
;
1114 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1117 /* Give all csects for this source file the same
1119 start_symtab (filestring
, NULL
, (CORE_ADDR
) 0);
1120 record_debugformat (debugfmt
);
1123 /* If this is the very first csect seen,
1124 basically `__start'. */
1127 first_object_file_end
1128 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1133 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1134 SECT_OFF_TEXT (objfile
));
1135 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1137 if (cs
->c_name
&& (cs
->c_name
[0] == '.'
1138 || cs
->c_name
[0] == '@'))
1140 last_csect_name
= cs
->c_name
;
1141 last_csect_val
= cs
->c_value
;
1142 last_csect_sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1147 /* All other symbols are put into the minimal symbol
1160 /* Ignore the symbol. */
1168 switch (CSECT_SCLAS (&main_aux
))
1171 /* a function entry point. */
1172 function_entry_point
:
1174 fcn_start_addr
= cs
->c_value
;
1176 /* save the function header info, which will be used
1177 when `.bf' is seen. */
1179 fcn_aux_saved
= main_aux
;
1183 /* shared library function trampoline code entry point. */
1187 /* The symbols often have the same names as debug symbols for
1188 functions, and confuse lookup_symbol. */
1192 /* xlc puts each variable in a separate csect, so we get
1193 an XTY_SD for each variable. But gcc puts several
1194 variables in a csect, so that each variable only gets
1195 an XTY_LD. This will typically be XMC_RW; I suspect
1196 XMC_RO and XMC_BS might be possible too.
1197 These variables are put in the minimal symbol table
1204 /* Common symbols are put into the minimal symbol table only. */
1212 /* If explicitly specified as a function, treat is as one. This check
1213 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1214 after the above CSECT check. */
1215 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1217 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1218 0, cs
->c_naux
, &main_aux
);
1219 goto function_entry_point
;
1222 switch (cs
->c_sclass
)
1227 /* c_value field contains symnum of next .file entry in table
1228 or symnum of first global after last .file. */
1230 next_file_symnum
= cs
->c_value
;
1232 /* Complete symbol table for last object file containing
1233 debugging information. */
1235 /* Whether or not there was a csect in the previous file, we
1236 have to call `end_stabs' and `start_stabs' to reset
1237 type_vector, line_vector, etc. structures. */
1239 complete_symtab (filestring
, file_start_addr
);
1240 cur_src_end_addr
= file_end_addr
;
1241 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1244 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1245 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1246 standard COFF way and put it in the auxent. We use the auxent if
1247 the symbol is ".file" and an auxent exists, otherwise use the symbol
1248 itself. Simple enough. */
1249 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1251 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1252 0, cs
->c_naux
, &main_aux
);
1253 filestring
= coff_getfilename (&main_aux
, objfile
);
1256 filestring
= cs
->c_name
;
1259 start_symtab (filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1260 record_debugformat (debugfmt
);
1261 last_csect_name
= 0;
1263 /* reset file start and end addresses. A compilation unit with no text
1264 (only data) should have zero file boundaries. */
1265 file_start_addr
= file_end_addr
= 0;
1269 fcn_stab_saved
= *cs
;
1273 if (strcmp (cs
->c_name
, ".bf") == 0)
1275 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1276 SECT_OFF_TEXT (objfile
));
1277 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1278 0, cs
->c_naux
, &main_aux
);
1280 within_function
= 1;
1282 new = push_context (0, fcn_start_addr
+ off
);
1284 new->name
= define_symbol
1285 (fcn_cs_saved
.c_value
+ off
,
1286 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1287 if (new->name
!= NULL
)
1288 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT (objfile
);
1290 else if (strcmp (cs
->c_name
, ".ef") == 0)
1293 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1294 0, cs
->c_naux
, &main_aux
);
1296 /* The value of .ef is the address of epilogue code;
1297 not useful for gdb. */
1298 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1299 contains number of lines to '}' */
1301 if (context_stack_depth
<= 0)
1302 { /* We attempted to pop an empty context stack */
1303 ef_complaint (cs
->c_symnum
);
1304 within_function
= 0;
1307 new = pop_context ();
1308 /* Stack must be empty now. */
1309 if (context_stack_depth
> 0 || new == NULL
)
1311 ef_complaint (cs
->c_symnum
);
1312 within_function
= 0;
1316 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1318 (fcn_cs_saved
.c_value
1319 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1320 + ANOFFSET (objfile
->section_offsets
,
1321 SECT_OFF_TEXT (objfile
))),
1323 within_function
= 0;
1328 /* Begin static block. */
1330 struct internal_syment symbol
;
1332 read_symbol (&symbol
, cs
->c_value
);
1333 static_block_base
= symbol
.n_value
;
1334 static_block_section
=
1335 secnum_to_section (symbol
.n_scnum
, objfile
);
1340 /* End of static block. */
1341 static_block_base
= 0;
1342 static_block_section
= -1;
1353 complaint (&symfile_complaints
, _("Unrecognized storage class %d."),
1368 /* beginning of include file */
1369 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1370 order. Thus, when wee see them, we might not know enough info
1371 to process them. Thus, we'll be saving them into a table
1372 (inclTable) and postpone their processing. */
1374 record_include_begin (cs
);
1378 /* End of include file. */
1379 /* See the comment after case C_BINCL. */
1380 record_include_end (cs
);
1384 if (strcmp (cs
->c_name
, ".bb") == 0)
1387 new = push_context (depth
,
1389 + ANOFFSET (objfile
->section_offsets
,
1390 SECT_OFF_TEXT (objfile
))));
1392 else if (strcmp (cs
->c_name
, ".eb") == 0)
1394 if (context_stack_depth
<= 0)
1395 { /* We attempted to pop an empty context stack */
1396 eb_complaint (cs
->c_symnum
);
1399 new = pop_context ();
1400 if (depth
-- != new->depth
)
1402 eb_complaint (cs
->c_symnum
);
1405 if (local_symbols
&& context_stack_depth
> 0)
1407 /* Make a block for the local symbols within. */
1408 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1411 + ANOFFSET (objfile
->section_offsets
,
1412 SECT_OFF_TEXT (objfile
))),
1415 local_symbols
= new->locals
;
1420 process_xcoff_symbol (cs
, objfile
);
1425 if (last_source_file
)
1429 complete_symtab (filestring
, file_start_addr
);
1430 cur_src_end_addr
= file_end_addr
;
1431 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1432 /* When reading symbols for the last C_FILE of the objfile, try
1433 to make sure that we set pst->symtab to the symtab for the
1434 file, not to the _globals_ symtab. I'm not sure whether this
1435 actually works right or when/if it comes up. */
1436 if (pst
->symtab
== NULL
)
1442 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1443 (SYMBOL2) = (struct symbol *) \
1444 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1445 *(SYMBOL2) = *(SYMBOL1);
1448 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1449 ((ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->objfile_obstack))
1452 /* process one xcoff symbol. */
1454 static struct symbol
*
1455 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1457 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1458 struct symbol onesymbol
;
1459 struct symbol
*sym
= &onesymbol
;
1460 struct symbol
*sym2
= NULL
;
1466 if (cs
->c_secnum
< 0)
1468 /* The value is a register number, offset within a frame, etc.,
1469 and does not get relocated. */
1475 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1476 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1483 memset (sym
, '\0', sizeof (struct symbol
));
1485 /* default assumptions */
1486 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1487 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1488 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1490 if (ISFCN (cs
->c_type
))
1492 /* At this point, we don't know the type of the function. This
1493 will be patched with the type from its stab entry later on in
1494 patch_block_stabs (), unless the file was compiled without -g. */
1496 SYMBOL_SET_LINKAGE_NAME (sym
, SYMNAME_ALLOC (name
, symname_alloced
));
1497 SYMBOL_TYPE (sym
) = builtin_type (gdbarch
)->nodebug_text_symbol
;
1499 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1500 SYMBOL_DUP (sym
, sym2
);
1502 if (cs
->c_sclass
== C_EXT
)
1503 add_symbol_to_list (sym2
, &global_symbols
);
1504 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1505 add_symbol_to_list (sym2
, &file_symbols
);
1509 /* In case we can't figure out the type, provide default. */
1510 SYMBOL_TYPE (sym
) = builtin_type (gdbarch
)->nodebug_data_symbol
;
1512 switch (cs
->c_sclass
)
1515 /* The values of functions and global symbols are now resolved
1516 via the global_sym_chain in stabsread.c. */
1518 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1519 add_stab_to_list (name
, &global_stabs
);
1521 add_stab_to_list (name
, &file_stabs
);
1525 add_stab_to_list (name
, &global_stabs
);
1530 common_block_start (cs
->c_name
, objfile
);
1534 common_block_end (objfile
);
1538 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1551 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1554 SYMBOL_SECTION (sym
) = sec
;
1561 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1562 all statics and we need to distinguish file-scope versus
1563 function-scope using within_function. We do this by
1564 changing the string we pass to define_symbol to use 'S'
1565 where we need to, which is not necessarily super-clean,
1566 but seems workable enough. */
1568 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1572 if (*pp
== 'V' && !within_function
)
1574 sym
= define_symbol ((cs
->c_value
1575 + ANOFFSET (objfile
->section_offsets
,
1576 static_block_section
)),
1577 cs
->c_name
, 0, 0, objfile
);
1580 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1581 SYMBOL_SECTION (sym
) = static_block_section
;
1590 /* Extract the file name from the aux entry of a C_FILE symbol.
1591 Result is in static storage and is only good for temporary use. */
1594 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1596 static char buffer
[BUFSIZ
];
1598 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1600 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
1601 + aux_entry
->x_file
.x_n
.x_offset
);
1604 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1605 buffer
[FILNMLEN
] = '\0';
1610 /* Set *SYMBOL to symbol number symno in symtbl. */
1612 read_symbol (struct internal_syment
*symbol
, int symno
)
1615 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->deprecated_sym_private
)->symtbl_num_syms
;
1617 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->deprecated_sym_private
)->symtbl
;
1618 if (symno
< 0 || symno
>= nsyms
)
1620 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1621 symbol
->n_value
= 0;
1622 symbol
->n_scnum
= -1;
1625 bfd_coff_swap_sym_in (this_symtab_psymtab
->objfile
->obfd
,
1626 stbl
+ (symno
* local_symesz
),
1630 /* Get value corresponding to symbol number symno in symtbl. */
1633 read_symbol_nvalue (int symno
)
1635 struct internal_syment symbol
[1];
1637 read_symbol (symbol
, symno
);
1638 return symbol
->n_value
;
1642 /* Find the address of the function corresponding to symno, where
1643 symno is the symbol pointed to by the linetable. */
1646 read_symbol_lineno (int symno
)
1648 struct objfile
*objfile
= this_symtab_psymtab
->objfile
;
1649 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1651 struct coff_symfile_info
*info
=
1652 (struct coff_symfile_info
*)objfile
->deprecated_sym_private
;
1653 int nsyms
= info
->symtbl_num_syms
;
1654 char *stbl
= info
->symtbl
;
1655 char *strtbl
= info
->strtbl
;
1657 struct internal_syment symbol
[1];
1658 union internal_auxent main_aux
[1];
1662 bf_notfound_complaint ();
1666 /* Note that just searching for a short distance (e.g. 50 symbols)
1667 is not enough, at least in the following case.
1670 [many .stabx entries]
1671 [a few functions, referring to foo]
1675 What happens here is that the assembler moves the .stabx entries
1676 to right before the ".bf" for foo, but the symbol for "foo" is before
1677 all the stabx entries. See PR gdb/2222. */
1679 /* Maintaining a table of .bf entries might be preferable to this search.
1680 If I understand things correctly it would need to be done only for
1681 the duration of a single psymtab to symtab conversion. */
1682 while (symno
< nsyms
)
1684 bfd_coff_swap_sym_in (symfile_bfd
,
1685 stbl
+ (symno
* local_symesz
), symbol
);
1686 if (symbol
->n_sclass
== C_FCN
)
1688 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1689 if (strcmp (name
, ".bf") == 0)
1692 symno
+= symbol
->n_numaux
+ 1;
1695 bf_notfound_complaint ();
1699 /* take aux entry and return its lineno */
1701 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1702 symbol
->n_type
, symbol
->n_sclass
,
1703 0, symbol
->n_numaux
, main_aux
);
1705 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1708 /* Support for line number handling */
1710 /* This function is called for every section; it finds the outer limits
1711 * of the line table (minimum and maximum file offset) so that the
1712 * mainline code can read the whole thing for efficiency.
1715 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1717 struct coff_symfile_info
*info
;
1719 file_ptr offset
, maxoff
;
1721 count
= asect
->lineno_count
;
1723 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1726 size
= count
* coff_data (abfd
)->local_linesz
;
1727 info
= (struct coff_symfile_info
*) vpinfo
;
1728 offset
= asect
->line_filepos
;
1729 maxoff
= offset
+ size
;
1731 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1732 info
->min_lineno_offset
= offset
;
1734 if (maxoff
> info
->max_lineno_offset
)
1735 info
->max_lineno_offset
= maxoff
;
1738 static void xcoff_psymtab_to_symtab_1 (struct partial_symtab
*);
1741 xcoff_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
1743 struct cleanup
*old_chain
;
1752 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1757 /* Read in all partial symtabs on which this one is dependent */
1758 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1759 if (!pst
->dependencies
[i
]->readin
)
1761 /* Inform about additional files that need to be read in. */
1764 fputs_filtered (" ", gdb_stdout
);
1766 fputs_filtered ("and ", gdb_stdout
);
1768 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1769 wrap_here (""); /* Flush output */
1770 gdb_flush (gdb_stdout
);
1772 xcoff_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1775 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1777 /* Init stuff necessary for reading in symbols. */
1780 old_chain
= make_cleanup (really_free_pendings
, 0);
1782 read_xcoff_symtab (pst
);
1784 do_cleanups (old_chain
);
1790 static void xcoff_psymtab_to_symtab (struct partial_symtab
*);
1792 /* Read in all of the symbols for a given psymtab for real.
1793 Be verbose about it if the user wants that. */
1796 xcoff_psymtab_to_symtab (struct partial_symtab
*pst
)
1806 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1811 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0
1812 || pst
->number_of_dependencies
)
1814 /* Print the message now, before reading the string table,
1815 to avoid disconcerting pauses. */
1818 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1819 gdb_flush (gdb_stdout
);
1822 sym_bfd
= pst
->objfile
->obfd
;
1824 next_symbol_text_func
= xcoff_next_symbol_text
;
1826 xcoff_psymtab_to_symtab_1 (pst
);
1828 /* Match with global symbols. This only needs to be done once,
1829 after all of the symtabs and dependencies have been read in. */
1830 scan_file_globals (pst
->objfile
);
1832 /* Finish up the debug error message. */
1834 printf_filtered ("done.\n");
1839 xcoff_new_init (struct objfile
*objfile
)
1841 stabsread_new_init ();
1842 buildsym_new_init ();
1845 /* Do initialization in preparation for reading symbols from OBJFILE.
1847 We will only be called if this is an XCOFF or XCOFF-like file.
1848 BFD handles figuring out the format of the file, and code in symfile.c
1849 uses BFD's determination to vector to us. */
1852 xcoff_symfile_init (struct objfile
*objfile
)
1854 /* Allocate struct to keep track of the symfile */
1855 objfile
->deprecated_sym_private
= xmalloc (sizeof (struct coff_symfile_info
));
1857 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1858 find this causes a significant slowdown in gdb then we could
1859 set it in the debug symbol readers only when necessary. */
1860 objfile
->flags
|= OBJF_REORDERED
;
1862 init_entry_point_info (objfile
);
1865 /* Perform any local cleanups required when we are done with a particular
1866 objfile. I.E, we are in the process of discarding all symbol information
1867 for an objfile, freeing up all memory held for it, and unlinking the
1868 objfile struct from the global list of known objfiles. */
1871 xcoff_symfile_finish (struct objfile
*objfile
)
1873 if (objfile
->deprecated_sym_private
!= NULL
)
1875 xfree (objfile
->deprecated_sym_private
);
1878 /* Start with a fresh include table for the next objfile. */
1884 inclIndx
= inclLength
= inclDepth
= 0;
1889 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1893 unsigned char lengthbuf
[4];
1896 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
= NULL
;
1898 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1899 error (_("cannot seek to string table in %s: %s"),
1900 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1902 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1903 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1905 /* If no string table is needed, then the file may end immediately
1906 after the symbols. Just return with `strtbl' set to NULL. */
1908 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1911 /* Allocate string table from objfile_obstack. We will need this table
1912 as long as we have its symbol table around. */
1914 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1915 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
= strtbl
;
1917 /* Copy length buffer, the first byte is usually zero and is
1918 used for stabs with a name length of zero. */
1919 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1920 if (length
== sizeof lengthbuf
)
1923 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1925 if (val
!= length
- sizeof lengthbuf
)
1926 error (_("cannot read string table from %s: %s"),
1927 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1928 if (strtbl
[length
- 1] != '\0')
1929 error (_("bad symbol file: string table does not end with null character"));
1934 /* If we have not yet seen a function for this psymtab, this is 0. If we
1935 have seen one, it is the offset in the line numbers of the line numbers
1937 static unsigned int first_fun_line_offset
;
1939 static struct partial_symtab
*xcoff_start_psymtab
1940 (struct objfile
*, char *, int,
1941 struct partial_symbol
**, struct partial_symbol
**);
1943 /* Allocate and partially fill a partial symtab. It will be
1944 completely filled at the end of the symbol list.
1946 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1947 is the address relative to which its symbols are (incremental) or 0
1950 static struct partial_symtab
*
1951 xcoff_start_psymtab (struct objfile
*objfile
, char *filename
, int first_symnum
,
1952 struct partial_symbol
**global_syms
,
1953 struct partial_symbol
**static_syms
)
1955 struct partial_symtab
*result
=
1956 start_psymtab_common (objfile
, objfile
->section_offsets
,
1958 /* We fill in textlow later. */
1960 global_syms
, static_syms
);
1962 result
->read_symtab_private
= (char *)
1963 obstack_alloc (&objfile
->objfile_obstack
, sizeof (struct symloc
));
1964 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1965 result
->read_symtab
= xcoff_psymtab_to_symtab
;
1967 /* Deduce the source language from the filename for this psymtab. */
1968 psymtab_language
= deduce_language_from_filename (filename
);
1973 static struct partial_symtab
*xcoff_end_psymtab
1974 (struct partial_symtab
*, char **, int, int,
1975 struct partial_symtab
**, int, int);
1977 /* Close off the current usage of PST.
1978 Returns PST, or NULL if the partial symtab was empty and thrown away.
1980 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1982 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1983 are the information for includes and dependencies. */
1985 static struct partial_symtab
*
1986 xcoff_end_psymtab (struct partial_symtab
*pst
, char **include_list
,
1987 int num_includes
, int capping_symbol_number
,
1988 struct partial_symtab
**dependency_list
,
1989 int number_dependencies
, int textlow_not_set
)
1992 struct objfile
*objfile
= pst
->objfile
;
1994 if (capping_symbol_number
!= -1)
1995 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
1996 capping_symbol_number
1997 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1998 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
1999 first_fun_line_offset
;
2000 first_fun_line_offset
= 0;
2001 pst
->n_global_syms
=
2002 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2003 pst
->n_static_syms
=
2004 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2006 pst
->number_of_dependencies
= number_dependencies
;
2007 if (number_dependencies
)
2009 pst
->dependencies
= (struct partial_symtab
**)
2010 obstack_alloc (&objfile
->objfile_obstack
,
2011 number_dependencies
* sizeof (struct partial_symtab
*));
2012 memcpy (pst
->dependencies
, dependency_list
,
2013 number_dependencies
* sizeof (struct partial_symtab
*));
2016 pst
->dependencies
= 0;
2018 for (i
= 0; i
< num_includes
; i
++)
2020 struct partial_symtab
*subpst
=
2021 allocate_psymtab (include_list
[i
], objfile
);
2023 subpst
->section_offsets
= pst
->section_offsets
;
2024 subpst
->read_symtab_private
=
2025 (char *) obstack_alloc (&objfile
->objfile_obstack
,
2026 sizeof (struct symloc
));
2027 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2028 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2029 subpst
->textlow
= 0;
2030 subpst
->texthigh
= 0;
2032 /* We could save slight bits of space by only making one of these,
2033 shared by the entire set of include files. FIXME-someday. */
2034 subpst
->dependencies
= (struct partial_symtab
**)
2035 obstack_alloc (&objfile
->objfile_obstack
,
2036 sizeof (struct partial_symtab
*));
2037 subpst
->dependencies
[0] = pst
;
2038 subpst
->number_of_dependencies
= 1;
2040 subpst
->globals_offset
=
2041 subpst
->n_global_syms
=
2042 subpst
->statics_offset
=
2043 subpst
->n_static_syms
= 0;
2047 subpst
->read_symtab
= pst
->read_symtab
;
2050 sort_pst_symbols (pst
);
2052 /* If there is already a psymtab or symtab for a file of this name,
2053 remove it. (If there is a symtab, more drastic things also
2054 happen.) This happens in VxWorks. */
2055 free_named_symtabs (pst
->filename
);
2057 if (num_includes
== 0
2058 && number_dependencies
== 0
2059 && pst
->n_global_syms
== 0
2060 && pst
->n_static_syms
== 0)
2062 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2063 it is on the obstack, but we can forget to chain it on the list. */
2064 /* Empty psymtabs happen as a result of header files which don't have
2065 any symbols in them. There can be a lot of them. */
2067 discard_psymtab (pst
);
2069 /* Indicate that psymtab was thrown away. */
2070 pst
= (struct partial_symtab
*) NULL
;
2075 static void swap_sym (struct internal_syment
*,
2076 union internal_auxent
*, char **, char **,
2077 unsigned int *, struct objfile
*);
2079 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2080 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2081 the symbol and its auxents. */
2084 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2085 char **name
, char **raw
, unsigned int *symnump
,
2086 struct objfile
*objfile
)
2088 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2089 if (symbol
->n_zeroes
)
2091 /* If it's exactly E_SYMNMLEN characters long it isn't
2093 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2095 /* FIXME: wastes memory for symbols which we don't end up putting
2096 into the minimal symbols. */
2098 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
2099 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2100 p
[E_SYMNMLEN
] = '\0';
2104 /* Point to the unswapped name as that persists as long as the
2106 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2108 else if (symbol
->n_sclass
& 0x80)
2110 *name
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
2115 *name
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
2119 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2120 if (symbol
->n_numaux
> 0)
2122 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2123 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2125 *symnump
+= symbol
->n_numaux
;
2126 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2131 function_outside_compilation_unit_complaint (const char *arg1
)
2133 complaint (&symfile_complaints
,
2134 _("function `%s' appears to be defined outside of all compilation units"),
2139 scan_xcoff_symtab (struct objfile
*objfile
)
2141 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2142 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2143 char *filestring
= NULL
;
2146 int past_first_source_file
= 0;
2151 /* Current partial symtab */
2152 struct partial_symtab
*pst
;
2154 /* List of current psymtab's include files */
2155 char **psymtab_include_list
;
2156 int includes_allocated
;
2159 /* Index within current psymtab dependency list */
2160 struct partial_symtab
**dependency_list
;
2161 int dependencies_used
, dependencies_allocated
;
2164 struct internal_syment symbol
;
2165 union internal_auxent main_aux
[5];
2166 unsigned int ssymnum
;
2168 char *last_csect_name
= NULL
; /* last seen csect's name and value */
2169 CORE_ADDR last_csect_val
= 0;
2170 int last_csect_sec
= 0;
2171 int misc_func_recorded
= 0; /* true if any misc. function */
2172 int textlow_not_set
= 1;
2174 pst
= (struct partial_symtab
*) 0;
2176 includes_allocated
= 30;
2178 psymtab_include_list
= (char **) alloca (includes_allocated
*
2181 dependencies_allocated
= 30;
2182 dependencies_used
= 0;
2184 (struct partial_symtab
**) alloca (dependencies_allocated
*
2185 sizeof (struct partial_symtab
*));
2187 last_source_file
= NULL
;
2189 abfd
= objfile
->obfd
;
2190 next_symbol_text_func
= xcoff_next_symbol_text
;
2192 sraw_symbol
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
;
2193 nsyms
= ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl_num_syms
;
2195 while (ssymnum
< nsyms
)
2201 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2202 sclass
= symbol
.n_sclass
;
2209 /* The CSECT auxent--always the last auxent. */
2210 union internal_auxent csect_aux
;
2211 unsigned int symnum_before
= ssymnum
;
2213 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2215 if (symbol
.n_numaux
> 1)
2217 bfd_coff_swap_aux_in
2219 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2222 symbol
.n_numaux
- 1,
2227 csect_aux
= main_aux
[0];
2229 /* If symbol name starts with ".$" or "$", ignore it. */
2230 if (namestring
[0] == '$'
2231 || (namestring
[0] == '.' && namestring
[1] == '$'))
2234 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2237 switch (csect_aux
.x_csect
.x_smclas
)
2240 if (last_csect_name
)
2242 /* If no misc. function recorded in the last
2243 seen csect, enter it as a function. This
2244 will take care of functions like strcmp()
2247 if (!misc_func_recorded
)
2249 RECORD_MINIMAL_SYMBOL
2250 (last_csect_name
, last_csect_val
,
2251 mst_text
, last_csect_sec
,
2257 /* We have to allocate one psymtab for
2258 each program csect, because their text
2259 sections need not be adjacent. */
2261 (pst
, psymtab_include_list
, includes_used
,
2262 symnum_before
, dependency_list
,
2263 dependencies_used
, textlow_not_set
);
2265 dependencies_used
= 0;
2266 /* Give all psymtabs for this source file the same
2268 pst
= xcoff_start_psymtab
2272 objfile
->global_psymbols
.next
,
2273 objfile
->static_psymbols
.next
);
2276 /* Activate the misc_func_recorded mechanism for
2277 compiler- and linker-generated CSECTs like ".strcmp"
2279 if (namestring
&& (namestring
[0] == '.'
2280 || namestring
[0] == '@'))
2282 last_csect_name
= namestring
;
2283 last_csect_val
= symbol
.n_value
;
2285 secnum_to_section (symbol
.n_scnum
, objfile
);
2290 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2291 if (highval
> pst
->texthigh
)
2292 pst
->texthigh
= highval
;
2293 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2294 pst
->textlow
= symbol
.n_value
;
2296 misc_func_recorded
= 0;
2301 /* Data variables are recorded in the minimal symbol
2302 table, except for section symbols. */
2303 if (*namestring
!= '.')
2304 prim_record_minimal_symbol_and_info
2305 (namestring
, symbol
.n_value
,
2306 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2307 secnum_to_section (symbol
.n_scnum
, objfile
),
2313 warning (_("More than one XMC_TC0 symbol found."));
2314 toc_offset
= symbol
.n_value
;
2316 /* Make TOC offset relative to start address of section. */
2317 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2319 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2323 /* These symbols tell us where the TOC entry for a
2324 variable is, not the variable itself. */
2333 switch (csect_aux
.x_csect
.x_smclas
)
2336 /* A function entry point. */
2338 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2339 first_fun_line_offset
=
2340 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2341 RECORD_MINIMAL_SYMBOL
2342 (namestring
, symbol
.n_value
,
2343 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2344 secnum_to_section (symbol
.n_scnum
, objfile
),
2349 /* shared library function trampoline code entry
2352 /* record trampoline code entries as
2353 mst_solib_trampoline symbol. When we lookup mst
2354 symbols, we will choose mst_text over
2355 mst_solib_trampoline. */
2356 RECORD_MINIMAL_SYMBOL
2357 (namestring
, symbol
.n_value
,
2358 mst_solib_trampoline
,
2359 secnum_to_section (symbol
.n_scnum
, objfile
),
2364 /* The symbols often have the same names as
2365 debug symbols for functions, and confuse
2371 /* xlc puts each variable in a separate csect,
2372 so we get an XTY_SD for each variable. But
2373 gcc puts several variables in a csect, so
2374 that each variable only gets an XTY_LD. We
2375 still need to record them. This will
2376 typically be XMC_RW; I suspect XMC_RO and
2377 XMC_BS might be possible too. */
2378 if (*namestring
!= '.')
2379 prim_record_minimal_symbol_and_info
2380 (namestring
, symbol
.n_value
,
2381 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2382 secnum_to_section (symbol
.n_scnum
, objfile
),
2389 switch (csect_aux
.x_csect
.x_smclas
)
2393 /* Common variables are recorded in the minimal symbol
2394 table, except for section symbols. */
2395 if (*namestring
!= '.')
2396 prim_record_minimal_symbol_and_info
2397 (namestring
, symbol
.n_value
,
2398 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2399 secnum_to_section (symbol
.n_scnum
, objfile
),
2412 unsigned int symnum_before
;
2414 symnum_before
= ssymnum
;
2415 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2418 /* See if the last csect needs to be recorded. */
2420 if (last_csect_name
&& !misc_func_recorded
)
2423 /* If no misc. function recorded in the last seen csect, enter
2424 it as a function. This will take care of functions like
2425 strcmp() compiled by xlc. */
2427 RECORD_MINIMAL_SYMBOL
2428 (last_csect_name
, last_csect_val
,
2429 mst_text
, last_csect_sec
, objfile
);
2434 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2435 symnum_before
, dependency_list
,
2436 dependencies_used
, textlow_not_set
);
2438 dependencies_used
= 0;
2440 first_fun_line_offset
= 0;
2442 /* XCOFF, according to the AIX 3.2 documentation, puts the
2443 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2444 do things the standard COFF way and put it in the auxent.
2445 We use the auxent if the symbol is ".file" and an auxent
2446 exists, otherwise use the symbol itself. */
2447 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2449 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2452 filestring
= namestring
;
2454 pst
= xcoff_start_psymtab (objfile
,
2457 objfile
->global_psymbols
.next
,
2458 objfile
->static_psymbols
.next
);
2459 last_csect_name
= NULL
;
2465 complaint (&symfile_complaints
,
2466 _("Storage class %d not recognized during scan"), sclass
);
2470 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2471 to handle only the C_FUN and C_EXT. */
2486 /* C_EINCL means we are switching back to the main file. But there
2487 is no reason to care; the only thing we want to know about
2488 includes is the names of all the included (.h) files. */
2493 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2497 /* I don't think the name of the common block (as opposed to the
2498 variables within it) is something which is user visible
2506 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2507 so C_LSYM would appear to be only for locals. */
2513 /* We probably could save a few instructions by assuming that
2514 C_LSYM, C_PSYM, etc., never have auxents. */
2515 int naux1
= symbol
.n_numaux
+ 1;
2517 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2523 /* Mark down an include file in the current psymtab */
2524 enum language tmp_language
;
2525 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2528 tmp_language
= deduce_language_from_filename (namestring
);
2530 /* Only change the psymtab's language if we've learned
2531 something useful (eg. tmp_language is not language_unknown).
2532 In addition, to match what start_subfile does, never change
2534 if (tmp_language
!= language_unknown
2535 && (tmp_language
!= language_c
2536 || psymtab_language
!= language_cplus
))
2537 psymtab_language
= tmp_language
;
2539 /* In C++, one may expect the same filename to come round many
2540 times, when code is coming alternately from the main file
2541 and from inline functions in other files. So I check to see
2542 if this is a file we've seen before -- either the main
2543 source file, or a previously included file.
2545 This seems to be a lot of time to be spending on N_SOL, but
2546 things like "break c-exp.y:435" need to work (I
2547 suppose the psymtab_include_list could be hashed or put
2548 in a binary tree, if profiling shows this is a major hog). */
2549 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2553 for (i
= 0; i
< includes_used
; i
++)
2554 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2562 psymtab_include_list
[includes_used
++] = namestring
;
2563 if (includes_used
>= includes_allocated
)
2565 char **orig
= psymtab_include_list
;
2567 psymtab_include_list
= (char **)
2568 alloca ((includes_allocated
*= 2) *
2570 memcpy (psymtab_include_list
, orig
,
2571 includes_used
* sizeof (char *));
2576 /* The value of the C_FUN is not the address of the function (it
2577 appears to be the address before linking), but as long as it
2578 is smaller than the actual address, then find_pc_partial_function
2579 will use the minimal symbols instead. I hope. */
2587 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2590 p
= (char *) strchr (namestring
, ':');
2592 continue; /* Not a debugging symbol. */
2594 /* Main processing section for debugging symbols which
2595 the initial read through the symbol tables needs to worry
2596 about. If we reach this point, the symbol which we are
2597 considering is definitely one we are interested in.
2598 p must also contain the (valid) index into the namestring
2599 which indicates the debugging type symbol. */
2604 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
2606 if (gdbarch_static_transform_name_p (gdbarch
))
2607 namestring
= gdbarch_static_transform_name
2608 (gdbarch
, namestring
);
2610 add_psymbol_to_list (namestring
, p
- namestring
,
2611 VAR_DOMAIN
, LOC_STATIC
,
2612 &objfile
->static_psymbols
,
2614 psymtab_language
, objfile
);
2618 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_DATA (objfile
));
2619 /* The addresses in these entries are reported to be
2620 wrong. See the code that reads 'G's for symtabs. */
2621 add_psymbol_to_list (namestring
, p
- namestring
,
2622 VAR_DOMAIN
, LOC_STATIC
,
2623 &objfile
->global_psymbols
,
2625 psymtab_language
, objfile
);
2629 /* When a 'T' entry is defining an anonymous enum, it
2630 may have a name which is the empty string, or a
2631 single space. Since they're not really defining a
2632 symbol, those shouldn't go in the partial symbol
2633 table. We do pick up the elements of such enums at
2634 'check_enum:', below. */
2635 if (p
>= namestring
+ 2
2636 || (p
== namestring
+ 1
2637 && namestring
[0] != ' '))
2639 add_psymbol_to_list (namestring
, p
- namestring
,
2640 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2641 &objfile
->static_psymbols
,
2643 psymtab_language
, objfile
);
2646 /* Also a typedef with the same name. */
2647 add_psymbol_to_list (namestring
, p
- namestring
,
2648 VAR_DOMAIN
, LOC_TYPEDEF
,
2649 &objfile
->static_psymbols
,
2651 psymtab_language
, objfile
);
2658 if (p
!= namestring
) /* a name is there, not just :T... */
2660 add_psymbol_to_list (namestring
, p
- namestring
,
2661 VAR_DOMAIN
, LOC_TYPEDEF
,
2662 &objfile
->static_psymbols
,
2664 psymtab_language
, objfile
);
2667 /* If this is an enumerated type, we need to
2668 add all the enum constants to the partial symbol
2669 table. This does not cover enums without names, e.g.
2670 "enum {a, b} c;" in C, but fortunately those are
2671 rare. There is no way for GDB to find those from the
2672 enum type without spending too much time on it. Thus
2673 to solve this problem, the compiler needs to put out the
2674 enum in a nameless type. GCC2 does this. */
2676 /* We are looking for something of the form
2677 <name> ":" ("t" | "T") [<number> "="] "e"
2678 {<constant> ":" <value> ","} ";". */
2680 /* Skip over the colon and the 't' or 'T'. */
2682 /* This type may be given a number. Also, numbers can come
2683 in pairs like (0,26). Skip over it. */
2684 while ((*p
>= '0' && *p
<= '9')
2685 || *p
== '(' || *p
== ',' || *p
== ')'
2691 /* The aix4 compiler emits extra crud before the members. */
2694 /* Skip over the type (?). */
2698 /* Skip over the colon. */
2702 /* We have found an enumerated type. */
2703 /* According to comments in read_enum_type
2704 a comma could end it instead of a semicolon.
2705 I don't know where that happens.
2707 while (*p
&& *p
!= ';' && *p
!= ',')
2711 /* Check for and handle cretinous dbx symbol name
2713 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2714 p
= next_symbol_text (objfile
);
2716 /* Point to the character after the name
2717 of the enum constant. */
2718 for (q
= p
; *q
&& *q
!= ':'; q
++)
2720 /* Note that the value doesn't matter for
2721 enum constants in psymtabs, just in symtabs. */
2722 add_psymbol_to_list (p
, q
- p
,
2723 VAR_DOMAIN
, LOC_CONST
,
2724 &objfile
->static_psymbols
, 0,
2725 0, psymtab_language
, objfile
);
2726 /* Point past the name. */
2728 /* Skip over the value. */
2729 while (*p
&& *p
!= ',')
2731 /* Advance past the comma. */
2739 /* Constant, e.g. from "const" in Pascal. */
2740 add_psymbol_to_list (namestring
, p
- namestring
,
2741 VAR_DOMAIN
, LOC_CONST
,
2742 &objfile
->static_psymbols
, symbol
.n_value
,
2743 0, psymtab_language
, objfile
);
2749 int name_len
= p
- namestring
;
2750 char *name
= xmalloc (name_len
+ 1);
2751 memcpy (name
, namestring
, name_len
);
2752 name
[name_len
] = '\0';
2753 function_outside_compilation_unit_complaint (name
);
2756 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2757 add_psymbol_to_list (namestring
, p
- namestring
,
2758 VAR_DOMAIN
, LOC_BLOCK
,
2759 &objfile
->static_psymbols
,
2761 psymtab_language
, objfile
);
2764 /* Global functions were ignored here, but now they
2765 are put into the global psymtab like one would expect.
2766 They're also in the minimal symbol table. */
2770 int name_len
= p
- namestring
;
2771 char *name
= xmalloc (name_len
+ 1);
2772 memcpy (name
, namestring
, name_len
);
2773 name
[name_len
] = '\0';
2774 function_outside_compilation_unit_complaint (name
);
2778 /* We need only the minimal symbols for these
2779 loader-generated definitions. Keeping the global
2780 symbols leads to "in psymbols but not in symbols"
2782 if (strncmp (namestring
, "@FIX", 4) == 0)
2785 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
2786 add_psymbol_to_list (namestring
, p
- namestring
,
2787 VAR_DOMAIN
, LOC_BLOCK
,
2788 &objfile
->global_psymbols
,
2790 psymtab_language
, objfile
);
2793 /* Two things show up here (hopefully); static symbols of
2794 local scope (static used inside braces) or extensions
2795 of structure symbols. We can ignore both. */
2809 case '#': /* for symbol identification (used in live ranges) */
2813 /* It is a C++ nested symbol. We don't need to record it
2814 (I don't think); if we try to look up foo::bar::baz,
2815 then symbols for the symtab containing foo should get
2816 read in, I think. */
2817 /* Someone says sun cc puts out symbols like
2818 /foo/baz/maclib::/usr/local/bin/maclib,
2819 which would get here with a symbol type of ':'. */
2823 /* Unexpected symbol descriptor. The second and subsequent stabs
2824 of a continued stab can show up here. The question is
2825 whether they ever can mimic a normal stab--it would be
2826 nice if not, since we certainly don't want to spend the
2827 time searching to the end of every string looking for
2830 complaint (&symfile_complaints
,
2831 _("unknown symbol descriptor `%c'"), p
[1]);
2833 /* Ignore it; perhaps it is an extension that we don't
2843 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2844 ssymnum
, dependency_list
,
2845 dependencies_used
, textlow_not_set
);
2848 /* Record the toc offset value of this symbol table into objfile structure.
2849 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2850 this information would be file auxiliary header. */
2852 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->toc_offset
= toc_offset
;
2855 /* Return the toc offset value for a given objfile. */
2858 xcoff_get_toc_offset (struct objfile
*objfile
)
2861 return ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->toc_offset
;
2865 /* Scan and build partial symbols for a symbol file.
2866 We have been initialized by a call to dbx_symfile_init, which
2867 put all the relevant info into a "struct dbx_symfile_info",
2868 hung off the objfile structure.
2870 SECTION_OFFSETS contains offsets relative to which the symbols in the
2871 various sections are (depending where the sections were actually loaded).
2872 MAINLINE is true if we are reading the main symbol
2873 table (as opposed to a shared lib or dynamically loaded file). */
2876 xcoff_initial_scan (struct objfile
*objfile
, int mainline
)
2880 struct cleanup
*back_to
;
2881 int num_symbols
; /* # of symbols */
2882 file_ptr symtab_offset
; /* symbol table and */
2883 file_ptr stringtab_offset
; /* string table file offsets */
2884 struct coff_symfile_info
*info
;
2888 info
= (struct coff_symfile_info
*) objfile
->deprecated_sym_private
;
2889 symfile_bfd
= abfd
= objfile
->obfd
;
2890 name
= objfile
->name
;
2892 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2893 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2894 stringtab_offset
= symtab_offset
+
2895 num_symbols
* coff_data (abfd
)->local_symesz
;
2897 info
->min_lineno_offset
= 0;
2898 info
->max_lineno_offset
= 0;
2899 bfd_map_over_sections (abfd
, find_linenos
, info
);
2901 if (num_symbols
> 0)
2903 /* Read the string table. */
2904 init_stringtab (abfd
, stringtab_offset
, objfile
);
2906 /* Read the .debug section, if present. */
2908 struct bfd_section
*secp
;
2909 bfd_size_type length
;
2910 char *debugsec
= NULL
;
2912 secp
= bfd_get_section_by_name (abfd
, ".debug");
2915 length
= bfd_section_size (abfd
, secp
);
2919 (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
2921 if (!bfd_get_section_contents (abfd
, secp
, debugsec
,
2922 (file_ptr
) 0, length
))
2924 error (_("Error reading .debug section of `%s': %s"),
2925 name
, bfd_errmsg (bfd_get_error ()));
2929 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
=
2934 /* Read the symbols. We keep them in core because we will want to
2935 access them randomly in read_symbol*. */
2936 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2938 error (_("Error reading symbols from %s: %s"),
2939 name
, bfd_errmsg (bfd_get_error ()));
2940 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2941 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
=
2942 obstack_alloc (&objfile
->objfile_obstack
, size
);
2943 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl_num_syms
=
2946 val
= bfd_bread (((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
,
2949 perror_with_name (_("reading symbol table"));
2951 /* If we are reinitializing, or if we have never loaded syms yet, init */
2953 || (objfile
->global_psymbols
.size
== 0
2954 && objfile
->static_psymbols
.size
== 0))
2955 /* I'm not sure how how good num_symbols is; the rule of thumb in
2956 init_psymbol_list was developed for a.out. On the one hand,
2957 num_symbols includes auxents. On the other hand, it doesn't
2959 init_psymbol_list (objfile
, num_symbols
);
2961 free_pending_blocks ();
2962 back_to
= make_cleanup (really_free_pendings
, 0);
2964 init_minimal_symbol_collection ();
2965 make_cleanup_discard_minimal_symbols ();
2967 /* Now that the symbol table data of the executable file are all in core,
2968 process them and define symbols accordingly. */
2970 scan_xcoff_symtab (objfile
);
2972 /* Install any minimal symbols that have been collected as the current
2973 minimal symbols for this objfile. */
2975 install_minimal_symbols (objfile
);
2977 do_cleanups (back_to
);
2981 xcoff_symfile_offsets (struct objfile
*objfile
, struct section_addr_info
*addrs
)
2983 asection
*sect
= NULL
;
2986 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
2987 objfile
->section_offsets
= (struct section_offsets
*)
2988 obstack_alloc (&objfile
->objfile_obstack
,
2989 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
2991 /* Initialize the section indexes for future use. */
2992 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
2994 objfile
->sect_index_text
= sect
->index
;
2996 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
2998 objfile
->sect_index_data
= sect
->index
;
3000 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
3002 objfile
->sect_index_bss
= sect
->index
;
3004 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
3006 objfile
->sect_index_rodata
= sect
->index
;
3008 for (i
= 0; i
< objfile
->num_sections
; ++i
)
3010 /* syms_from_objfile kindly subtracts from addr the
3011 bfd_section_vma of the .text section. This strikes me as
3012 wrong--whether the offset to be applied to symbol reading is
3013 relative to the start address of the section depends on the
3014 symbol format. In any event, this whole "addr" concept is
3015 pretty broken (it doesn't handle any section but .text
3016 sensibly), so just ignore the addr parameter and use 0.
3017 rs6000-nat.c will set the correct section offsets via
3018 objfile_relocate. */
3019 (objfile
->section_offsets
)->offsets
[i
] = 0;
3023 /* Register our ability to parse symbols for xcoff BFD files. */
3025 static struct sym_fns xcoff_sym_fns
=
3028 /* It is possible that coff and xcoff should be merged as
3029 they do have fundamental similarities (for example, the extra storage
3030 classes used for stabs could presumably be recognized in any COFF file).
3031 However, in addition to obvious things like all the csect hair, there are
3032 some subtler differences between xcoffread.c and coffread.c, notably
3033 the fact that coffread.c has no need to read in all the symbols, but
3034 xcoffread.c reads all the symbols and does in fact randomly access them
3035 (in C_BSTAT and line number processing). */
3037 bfd_target_xcoff_flavour
,
3039 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
3040 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
3041 xcoff_initial_scan
, /* sym_read: read a symbol file into symtab */
3042 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
3043 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
3044 default_symfile_segments
, /* sym_segments: Get segment information from
3046 aix_process_linenos
, /* sym_read_linetable */
3047 NULL
/* next: pointer to next struct sym_fns */
3050 /* Provide a prototype to silence -Wmissing-prototypes. */
3051 extern initialize_file_ftype _initialize_xcoffread
;
3054 _initialize_xcoffread (void)
3056 add_symtab_fns (&xcoff_sym_fns
);