1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2017 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
32 #include "coff/internal.h"
33 #include "libcoff.h" /* FIXME, internal data from BFD */
34 #include "coff/xcoff.h"
36 #include "coff/rs6000.h"
37 #include "xcoffread.h"
41 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "stabsread.h"
46 #include "expression.h"
47 #include "complaints.h"
50 #include "gdb-stabs.h"
52 /* For interface with stabsread.c. */
53 #include "aout/stab_gnu.h"
56 /* Key for XCOFF-associated data. */
58 static const struct objfile_data
*xcoff_objfile_data_key
;
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
80 unsigned int lineno_off
;
83 /* Remember what we deduced to be the source language of this psymtab. */
85 static enum language psymtab_language
= language_unknown
;
88 /* Simplified internal version of coff symbol table information. */
93 int c_symnum
; /* Symbol number of this entry. */
94 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
96 unsigned char c_sclass
;
101 /* Last function's saved coff symbol `cs'. */
103 static struct coff_symbol fcn_cs_saved
;
105 static bfd
*symfile_bfd
;
107 /* Core address of start and end of text of current source file.
108 This is calculated from the first function seen after a C_FILE
112 static CORE_ADDR cur_src_end_addr
;
114 /* Core address of the end of the first object file. */
116 static CORE_ADDR first_object_file_end
;
118 /* Initial symbol-table-debug-string vector length. */
120 #define INITIAL_STABVECTOR_LENGTH 40
122 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
123 there is any reason not to just use a #define, but might as well
124 ask BFD for the size and store it here, I guess. */
126 static unsigned local_symesz
;
128 struct coff_symfile_info
130 file_ptr min_lineno_offset
; /* Where in file lowest line#s are. */
131 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file. */
133 /* Pointer to the string table. */
136 /* Pointer to debug section. */
139 /* Pointer to the a.out symbol table. */
142 /* Number of symbols in symtbl. */
145 /* Offset in data section to TOC anchor. */
146 CORE_ADDR toc_offset
;
149 /* Convenience macro to access the per-objfile XCOFF data. */
151 #define XCOFF_DATA(objfile) \
152 ((struct coff_symfile_info *) objfile_data ((objfile), \
153 xcoff_objfile_data_key))
155 /* XCOFF names for dwarf sections. There is no compressed sections. */
157 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
159 { ".dwabrev", NULL
},
162 /* AIX XCOFF defines one, named DWARF section for macro debug information.
163 XLC does not generate debug_macinfo for DWARF4 and below.
164 The section is assigned to debug_macro for DWARF5 and above. */
168 { ".dwrnges", NULL
},
169 { ".dwpbtyp", NULL
},
170 { NULL
, NULL
}, /* debug_addr */
171 { ".dwframe", NULL
},
172 { NULL
, NULL
}, /* eh_frame */
173 { NULL
, NULL
}, /* gdb_index */
178 bf_notfound_complaint (void)
180 complaint (&symfile_complaints
,
181 _("line numbers off, `.bf' symbol not found"));
185 ef_complaint (int arg1
)
187 complaint (&symfile_complaints
,
188 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
192 eb_complaint (int arg1
)
194 complaint (&symfile_complaints
,
195 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
198 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
200 static void scan_xcoff_symtab (minimal_symbol_reader
&,
203 static char *xcoff_next_symbol_text (struct objfile
*);
205 static void record_include_begin (struct coff_symbol
*);
208 enter_line_range (struct subfile
*, unsigned, unsigned,
209 CORE_ADDR
, CORE_ADDR
, unsigned *);
211 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
213 static void xcoff_symfile_init (struct objfile
*);
215 static void xcoff_new_init (struct objfile
*);
217 static void xcoff_symfile_finish (struct objfile
*);
219 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
221 static void read_symbol (struct internal_syment
*, int);
223 static int read_symbol_lineno (int);
225 static CORE_ADDR
read_symbol_nvalue (int);
227 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
230 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
233 static void add_stab_to_list (char *, struct pending_stabs
**);
236 static int compare_lte (const void *, const void *);
238 static struct linetable
*arrange_linetable (struct linetable
*);
240 static void record_include_end (struct coff_symbol
*);
242 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
245 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
247 static int secnum_to_section (int, struct objfile
*);
248 static asection
*secnum_to_bfd_section (int, struct objfile
*);
250 struct find_targ_sec_arg
255 struct objfile
*objfile
;
258 static void find_targ_sec (bfd
*, asection
*, void *);
261 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
263 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
264 struct objfile
*objfile
= args
->objfile
;
266 if (sect
->target_index
== args
->targ_index
)
268 /* This is the section. Figure out what SECT_OFF_* code it is. */
269 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
270 *args
->resultp
= SECT_OFF_TEXT (objfile
);
271 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
272 *args
->resultp
= SECT_OFF_DATA (objfile
);
274 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
275 *args
->bfd_sect
= sect
;
279 /* Search all BFD sections for the section whose target_index is
280 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
281 associated index in the objfile's section_offset table is also
284 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
285 is set to the text section's number. */
288 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
289 asection
**bfd_sect
, int *secnum
)
291 struct find_targ_sec_arg args
;
293 args
.targ_index
= n_scnum
;
294 args
.resultp
= secnum
;
295 args
.bfd_sect
= bfd_sect
;
296 args
.objfile
= objfile
;
299 *secnum
= SECT_OFF_TEXT (objfile
);
301 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
304 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
307 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
312 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
316 /* Return the BFD section that N_SCNUM points to. */
319 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
324 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
328 /* add a given stab string into given stab vector. */
333 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
335 if (*stabvector
== NULL
)
337 *stabvector
= (struct pending_stabs
*)
338 xmalloc (sizeof (struct pending_stabs
) +
339 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
340 (*stabvector
)->count
= 0;
341 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
343 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
345 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
346 *stabvector
= (struct pending_stabs
*)
347 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
348 (*stabvector
)->length
* sizeof (char *));
350 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
355 /* Linenos are processed on a file-by-file basis.
359 1) xlc (IBM's native c compiler) postpones static function code
360 emission to the end of a compilation unit. This way it can
361 determine if those functions (statics) are needed or not, and
362 can do some garbage collection (I think). This makes line
363 numbers and corresponding addresses unordered, and we end up
364 with a line table like:
381 and that breaks gdb's binary search on line numbers, if the
382 above table is not sorted on line numbers. And that sort
383 should be on function based, since gcc can emit line numbers
386 10 0x100 - for the init/test part of a for stmt.
389 10 0x400 - for the increment part of a for stmt.
391 arrange_linetable() will do this sorting.
393 2) aix symbol table might look like:
395 c_file // beginning of a new file
396 .bi // beginning of include file
397 .ei // end of include file
401 basically, .bi/.ei pairs do not necessarily encapsulate
402 their scope. They need to be recorded, and processed later
403 on when we come the end of the compilation unit.
404 Include table (inclTable) and process_linenos() handle
410 /* compare line table entry addresses. */
413 compare_lte (const void *lte1p
, const void *lte2p
)
415 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
416 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
418 return lte1
->pc
- lte2
->pc
;
421 /* Given a line table with function entries are marked, arrange its
422 functions in ascending order and strip off function entry markers
423 and return it in a newly created table. If the old one is good
424 enough, return the old one. */
425 /* FIXME: I think all this stuff can be replaced by just passing
426 sort_linevec = 1 to end_symtab. */
428 static struct linetable
*
429 arrange_linetable (struct linetable
*oldLineTb
)
431 int ii
, jj
, newline
, /* new line count */
432 function_count
; /* # of functions */
434 struct linetable_entry
*fentry
; /* function entry vector */
435 int fentry_size
; /* # of function entries */
436 struct linetable
*newLineTb
; /* new line table */
439 #define NUM_OF_FUNCTIONS 20
441 fentry_size
= NUM_OF_FUNCTIONS
;
442 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
444 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
446 if (oldLineTb
->item
[ii
].line
== 0)
447 { /* Function entry found. */
448 if (function_count
>= fentry_size
)
449 { /* Make sure you have room. */
451 fentry
= (struct linetable_entry
*)
453 fentry_size
* sizeof (struct linetable_entry
));
455 fentry
[function_count
].line
= ii
;
456 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
459 /* If the function was compiled with XLC, we may have to add an
460 extra line entry later. Reserve space for that. */
461 if (ii
+ 1 < oldLineTb
->nitems
462 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
467 if (function_count
== 0)
472 else if (function_count
> 1)
473 qsort (fentry
, function_count
,
474 sizeof (struct linetable_entry
), compare_lte
);
476 /* Allocate a new line table. */
477 newLineTb
= (struct linetable
*)
479 (sizeof (struct linetable
) +
480 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
482 /* If line table does not start with a function beginning, copy up until
486 if (oldLineTb
->item
[0].line
!= 0)
488 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
489 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
491 /* Now copy function lines one by one. */
493 for (ii
= 0; ii
< function_count
; ++ii
)
495 /* If the function was compiled with XLC, we may have to add an
496 extra line to cover the function prologue. */
497 jj
= fentry
[ii
].line
;
498 if (jj
+ 1 < oldLineTb
->nitems
499 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
501 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
502 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
506 for (jj
= fentry
[ii
].line
+ 1;
507 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
509 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
512 /* The number of items in the line table must include these
513 extra lines which were added in case of XLC compiled functions. */
514 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
518 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
519 following `IncludeChain'. At the end of each symtab (end_symtab),
520 we will determine if we should create additional symtab's to
521 represent if (the include files. */
524 typedef struct _inclTable
526 char *name
; /* include filename */
528 /* Offsets to the line table. end points to the last entry which is
529 part of this include file. */
532 struct subfile
*subfile
;
533 unsigned funStartLine
; /* Start line # of its function. */
537 #define INITIAL_INCLUDE_TABLE_LENGTH 20
538 static InclTable
*inclTable
; /* global include table */
539 static int inclIndx
; /* last entry to table */
540 static int inclLength
; /* table length */
541 static int inclDepth
; /* nested include depth */
543 static void allocate_include_entry (void);
546 record_include_begin (struct coff_symbol
*cs
)
550 /* In xcoff, we assume include files cannot be nested (not in .c files
551 of course, but in corresponding .s files.). */
553 /* This can happen with old versions of GCC.
554 GCC 2.3.3-930426 does not exhibit this on a test case which
555 a user said produced the message for him. */
556 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
560 allocate_include_entry ();
562 inclTable
[inclIndx
].name
= cs
->c_name
;
563 inclTable
[inclIndx
].begin
= cs
->c_value
;
567 record_include_end (struct coff_symbol
*cs
)
573 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
576 allocate_include_entry ();
578 pTbl
= &inclTable
[inclIndx
];
579 pTbl
->end
= cs
->c_value
;
586 allocate_include_entry (void)
588 if (inclTable
== NULL
)
590 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
591 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
594 else if (inclIndx
>= inclLength
)
596 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
597 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
598 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
599 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
603 /* Global variable to pass the psymtab down to all the routines involved
604 in psymtab to symtab processing. */
605 static struct partial_symtab
*this_symtab_psymtab
;
607 /* Objfile related to this_symtab_psymtab; set at the same time. */
608 static struct objfile
*this_symtab_objfile
;
610 /* given the start and end addresses of a compilation unit (or a csect,
611 at times) process its lines and create appropriate line vectors. */
614 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
618 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
620 /* subfile structure for the main compilation unit. */
621 struct subfile main_subfile
;
623 /* In the main source file, any time we see a function entry, we
624 reset this variable to function's absolute starting line number.
625 All the following line numbers in the function are relative to
626 this, and we record absolute line numbers in record_line(). */
628 unsigned int main_source_baseline
= 0;
633 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
635 goto return_after_cleanup
;
637 memset (&main_subfile
, '\0', sizeof (main_subfile
));
640 /* All source lines were in the main source file. None in include
643 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
644 &main_source_baseline
);
648 /* There was source with line numbers in include files. */
651 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
652 main_source_baseline
= 0;
654 for (ii
= 0; ii
< inclIndx
; ++ii
)
656 struct subfile
*tmpSubfile
;
658 /* If there is main file source before include file, enter it. */
659 if (offset
< inclTable
[ii
].begin
)
662 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
663 start
, 0, &main_source_baseline
);
666 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
668 /* The entry in the include table refers to the main source
669 file. Add the lines to the main subfile. */
671 main_source_baseline
= inclTable
[ii
].funStartLine
;
673 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
674 start
, 0, &main_source_baseline
);
675 inclTable
[ii
].subfile
= &main_subfile
;
679 /* Have a new subfile for the include file. */
681 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
683 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
684 firstLine
= &(inclTable
[ii
].funStartLine
);
686 /* Enter include file's lines now. */
687 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
688 inclTable
[ii
].end
, start
, 0, firstLine
);
691 if (offset
<= inclTable
[ii
].end
)
692 offset
= inclTable
[ii
].end
+ linesz
;
695 /* All the include files' line have been processed at this point. Now,
696 enter remaining lines of the main file, if any left. */
697 if (offset
< max_offset
+ 1 - linesz
)
699 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
700 &main_source_baseline
);
704 /* Process main file's line numbers. */
705 if (main_subfile
.line_vector
)
707 struct linetable
*lineTb
, *lv
;
709 lv
= main_subfile
.line_vector
;
711 /* Line numbers are not necessarily ordered. xlc compilation will
712 put static function to the end. */
714 lineTb
= arrange_linetable (lv
);
717 current_subfile
->line_vector
= (struct linetable
*)
718 xrealloc (lv
, (sizeof (struct linetable
)
719 + lv
->nitems
* sizeof (struct linetable_entry
)));
724 current_subfile
->line_vector
= lineTb
;
727 current_subfile
->line_vector_length
=
728 current_subfile
->line_vector
->nitems
;
731 /* Now, process included files' line numbers. */
733 for (ii
= 0; ii
< inclIndx
; ++ii
)
735 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
736 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
739 struct linetable
*lineTb
, *lv
;
741 lv
= (inclTable
[ii
].subfile
)->line_vector
;
743 /* Line numbers are not necessarily ordered. xlc compilation will
744 put static function to the end. */
746 lineTb
= arrange_linetable (lv
);
750 /* For the same include file, we might want to have more than one
751 subfile. This happens if we have something like:
759 while foo.h including code in it. (stupid but possible)
760 Since start_subfile() looks at the name and uses an
761 existing one if finds, we need to provide a fake name and
765 start_subfile (inclTable
[ii
].name
);
768 /* Pick a fake name that will produce the same results as this
769 one when passed to deduce_language_from_filename. Kludge on
771 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
773 if (fakename
== NULL
)
775 start_subfile (fakename
);
776 xfree (current_subfile
->name
);
778 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
783 current_subfile
->line_vector
=
784 (struct linetable
*) xrealloc
785 (lv
, (sizeof (struct linetable
)
786 + lv
->nitems
* sizeof (struct linetable_entry
)));
792 current_subfile
->line_vector
= lineTb
;
795 current_subfile
->line_vector_length
=
796 current_subfile
->line_vector
->nitems
;
797 start_subfile (pop_subfile ());
801 return_after_cleanup
:
803 /* We don't want to keep alloc/free'ing the global include file table. */
808 aix_process_linenos (struct objfile
*objfile
)
810 /* There is no linenos to read if there are only dwarf info. */
811 if (this_symtab_psymtab
== NULL
)
814 /* Process line numbers and enter them into line vector. */
815 process_linenos (last_source_start_addr
, cur_src_end_addr
);
819 /* Enter a given range of lines into the line vector.
820 can be called in the following two ways:
821 enter_line_range (subfile, beginoffset, endoffset,
822 startaddr, 0, firstLine) or
823 enter_line_range (subfile, beginoffset, 0,
824 startaddr, endaddr, firstLine)
826 endoffset points to the last line table entry that we should pay
830 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
831 unsigned endoffset
, /* offsets to line table */
832 CORE_ADDR startaddr
, /* offsets to line table */
833 CORE_ADDR endaddr
, unsigned *firstLine
)
835 struct objfile
*objfile
= this_symtab_objfile
;
836 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
837 unsigned int curoffset
;
840 struct internal_lineno int_lnno
;
841 unsigned int limit_offset
;
845 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
847 curoffset
= beginoffset
;
848 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
852 if (endoffset
>= limit_offset
)
854 complaint (&symfile_complaints
,
855 _("Bad line table offset in C_EINCL directive"));
858 limit_offset
= endoffset
;
863 abfd
= objfile
->obfd
;
864 linesz
= coff_data (abfd
)->local_linesz
;
865 ext_lnno
= alloca (linesz
);
867 while (curoffset
<= limit_offset
)
869 bfd_seek (abfd
, curoffset
, SEEK_SET
);
870 bfd_bread (ext_lnno
, linesz
, abfd
);
871 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
873 /* Find the address this line represents. */
874 addr
= (int_lnno
.l_lnno
875 ? int_lnno
.l_addr
.l_paddr
876 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
877 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
879 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
882 if (int_lnno
.l_lnno
== 0)
884 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
885 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
889 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
890 gdbarch_addr_bits_remove (gdbarch
, addr
));
896 /* Save the vital information for use when closing off the current file.
897 NAME is the file name the symbols came from, START_ADDR is the first
898 text address for the file, and SIZE is the number of bytes of text. */
900 #define complete_symtab(name, start_addr) { \
901 set_last_source_file (name); \
902 last_source_start_addr = start_addr; \
906 /* Refill the symbol table input buffer
907 and set the variables that control fetching entries from it.
908 Reports an error if no data available.
909 This function can read past the end of the symbol table
910 (into the string table) but this does no harm. */
912 /* Create a new minimal symbol (using record_with_info).
914 Creation of all new minimal symbols should go through this function
915 rather than calling the various record functions in order
916 to make sure that all symbol addresses get properly relocated.
920 NAME - the symbol's name (but if NAME starts with a period, that
921 leading period is discarded).
922 ADDRESS - the symbol's address, prior to relocation. This function
923 relocates the address before recording the minimal symbol.
924 MS_TYPE - the symbol's type.
925 N_SCNUM - the symbol's XCOFF section number.
926 OBJFILE - the objfile associated with the minimal symbol. */
929 record_minimal_symbol (minimal_symbol_reader
&reader
,
930 const char *name
, CORE_ADDR address
,
931 enum minimal_symbol_type ms_type
,
933 struct objfile
*objfile
)
938 reader
.record_with_info (name
, address
, ms_type
,
939 secnum_to_section (n_scnum
, objfile
));
942 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
943 nested. At any given time, a symbol can only be in one static block.
944 This is the base address of current static block, zero if non exists. */
946 static int static_block_base
= 0;
948 /* Section number for the current static block. */
950 static int static_block_section
= -1;
952 /* true if space for symbol name has been allocated. */
954 static int symname_alloced
= 0;
956 /* Next symbol to read. Pointer into raw seething symbol table. */
958 static char *raw_symbol
;
960 /* This is the function which stabsread.c calls to get symbol
964 xcoff_next_symbol_text (struct objfile
*objfile
)
966 struct internal_syment symbol
;
969 /* FIXME: is this the same as the passed arg? */
970 if (this_symtab_objfile
)
971 objfile
= this_symtab_objfile
;
973 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
976 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
978 /* Return something which points to '\0' and hope the symbol reading
979 code does something reasonable. */
982 else if (symbol
.n_sclass
& 0x80)
984 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
985 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
990 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
992 /* Return something which points to '\0' and hope the symbol reading
993 code does something reasonable. */
999 /* Read symbols for a given partial symbol table. */
1002 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1004 bfd
*abfd
= objfile
->obfd
;
1005 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1006 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1007 char *strtbl
= xcoff
->strtbl
;
1008 char *debugsec
= xcoff
->debugsec
;
1009 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1011 struct internal_syment symbol
[1];
1012 union internal_auxent main_aux
;
1013 struct coff_symbol cs
[1];
1014 CORE_ADDR file_start_addr
= 0;
1015 CORE_ADDR file_end_addr
= 0;
1017 int next_file_symnum
= -1;
1018 unsigned int max_symnum
;
1019 int just_started
= 1;
1021 CORE_ADDR fcn_start_addr
= 0;
1023 struct coff_symbol fcn_stab_saved
= { 0 };
1025 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1026 union internal_auxent fcn_aux_saved
= main_aux
;
1027 struct context_stack
*newobj
;
1029 const char *filestring
= pst
->filename
; /* Name of the current file. */
1031 const char *last_csect_name
; /* Last seen csect's name. */
1033 this_symtab_psymtab
= pst
;
1034 this_symtab_objfile
= objfile
;
1036 /* Get the appropriate COFF "constants" related to the file we're
1038 local_symesz
= coff_data (abfd
)->local_symesz
;
1040 set_last_source_file (NULL
);
1041 last_csect_name
= 0;
1044 start_symtab (objfile
, filestring
, (char *) NULL
, file_start_addr
);
1045 record_debugformat (debugfmt
);
1046 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1048 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1049 first_object_file_end
= 0;
1051 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1053 while (symnum
< max_symnum
)
1055 QUIT
; /* make this command interruptable. */
1057 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1058 /* read one symbol into `cs' structure. After processing the
1059 whole symbol table, only string table will be kept in memory,
1060 symbol table and debug section of xcoff will be freed. Thus
1061 we can mark symbols with names in string table as
1066 /* Swap and align the symbol into a reasonable C structure. */
1067 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1069 cs
->c_symnum
= symnum
;
1070 cs
->c_naux
= symbol
->n_numaux
;
1071 if (symbol
->n_zeroes
)
1073 symname_alloced
= 0;
1074 /* We must use the original, unswapped, name here so the name field
1075 pointed to by cs->c_name will persist throughout xcoffread. If
1076 we use the new field, it gets overwritten for each symbol. */
1077 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1078 /* If it's exactly E_SYMNMLEN characters long it isn't
1080 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1084 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1086 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1087 p
[E_SYMNMLEN
] = '\0';
1089 symname_alloced
= 1;
1092 else if (symbol
->n_sclass
& 0x80)
1094 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1095 symname_alloced
= 0;
1099 /* in string table */
1100 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1101 symname_alloced
= 1;
1103 cs
->c_value
= symbol
->n_value
;
1104 cs
->c_sclass
= symbol
->n_sclass
;
1105 cs
->c_secnum
= symbol
->n_scnum
;
1106 cs
->c_type
= (unsigned) symbol
->n_type
;
1108 raw_symbol
+= local_symesz
;
1111 /* Save addr of first aux entry. */
1112 raw_auxptr
= raw_symbol
;
1114 /* Skip all the auxents associated with this symbol. */
1115 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1117 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1122 /* if symbol name starts with ".$" or "$", ignore it. */
1123 if (cs
->c_name
[0] == '$'
1124 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1127 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1129 if (get_last_source_file ())
1131 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1132 SECT_OFF_TEXT (objfile
));
1137 start_symtab (objfile
, "_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1138 record_debugformat (debugfmt
);
1139 cur_src_end_addr
= first_object_file_end
;
1140 /* Done with all files, everything from here on is globals. */
1143 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1146 /* Dealing with a symbol with a csect entry. */
1148 #define CSECT(PP) ((PP)->x_csect)
1149 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1150 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1151 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1152 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1154 /* Convert the auxent to something we can access. */
1155 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1156 0, cs
->c_naux
, &main_aux
);
1158 switch (CSECT_SMTYP (&main_aux
))
1162 /* Ignore all external references. */
1166 /* A section description. */
1168 switch (CSECT_SCLAS (&main_aux
))
1174 /* A program csect is seen. We have to allocate one
1175 symbol table for each program csect. Normally gdb
1176 prefers one symtab for each source file. In case
1177 of AIX, one source file might include more than one
1178 [PR] csect, and they don't have to be adjacent in
1179 terms of the space they occupy in memory. Thus, one
1180 single source file might get fragmented in the
1181 memory and gdb's file start and end address
1182 approach does not work! GCC (and I think xlc) seem
1183 to put all the code in the unnamed program csect. */
1185 if (last_csect_name
)
1187 complete_symtab (filestring
, file_start_addr
);
1188 cur_src_end_addr
= file_end_addr
;
1189 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1192 /* Give all csects for this source file the same
1194 start_symtab (objfile
, filestring
, NULL
,
1196 record_debugformat (debugfmt
);
1199 /* If this is the very first csect seen,
1200 basically `__start'. */
1203 first_object_file_end
1204 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1209 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1210 SECT_OFF_TEXT (objfile
));
1211 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1213 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1214 last_csect_name
= cs
->c_name
;
1218 /* All other symbols are put into the minimal symbol
1231 /* Ignore the symbol. */
1239 switch (CSECT_SCLAS (&main_aux
))
1242 /* a function entry point. */
1243 function_entry_point
:
1245 fcn_start_addr
= cs
->c_value
;
1247 /* save the function header info, which will be used
1248 when `.bf' is seen. */
1250 fcn_aux_saved
= main_aux
;
1254 /* shared library function trampoline code entry point. */
1258 /* The symbols often have the same names as debug symbols for
1259 functions, and confuse lookup_symbol. */
1263 /* xlc puts each variable in a separate csect, so we get
1264 an XTY_SD for each variable. But gcc puts several
1265 variables in a csect, so that each variable only gets
1266 an XTY_LD. This will typically be XMC_RW; I suspect
1267 XMC_RO and XMC_BS might be possible too.
1268 These variables are put in the minimal symbol table
1275 /* Common symbols are put into the minimal symbol table only. */
1283 /* If explicitly specified as a function, treat is as one. This check
1284 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1285 after the above CSECT check. */
1286 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1288 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1289 0, cs
->c_naux
, &main_aux
);
1290 goto function_entry_point
;
1293 switch (cs
->c_sclass
)
1297 /* c_value field contains symnum of next .file entry in table
1298 or symnum of first global after last .file. */
1300 next_file_symnum
= cs
->c_value
;
1302 /* Complete symbol table for last object file containing
1303 debugging information. */
1305 /* Whether or not there was a csect in the previous file, we
1306 have to call `end_stabs' and `start_stabs' to reset
1307 type_vector, line_vector, etc. structures. */
1309 complete_symtab (filestring
, file_start_addr
);
1310 cur_src_end_addr
= file_end_addr
;
1311 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1314 /* XCOFF, according to the AIX 3.2 documentation, puts the
1315 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1316 do things the standard COFF way and put it in the auxent.
1317 We use the auxent if the symbol is ".file" and an auxent
1318 exists, otherwise use the symbol itself. Simple
1320 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1322 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1323 0, cs
->c_naux
, &main_aux
);
1324 filestring
= coff_getfilename (&main_aux
, objfile
);
1327 filestring
= cs
->c_name
;
1330 start_symtab (objfile
, filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1331 record_debugformat (debugfmt
);
1332 last_csect_name
= 0;
1334 /* reset file start and end addresses. A compilation unit
1335 with no text (only data) should have zero file
1337 file_start_addr
= file_end_addr
= 0;
1341 fcn_stab_saved
= *cs
;
1345 if (strcmp (cs
->c_name
, ".bf") == 0)
1347 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1348 SECT_OFF_TEXT (objfile
));
1350 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1351 0, cs
->c_naux
, &main_aux
);
1353 within_function
= 1;
1355 newobj
= push_context (0, fcn_start_addr
+ off
);
1357 newobj
->name
= define_symbol
1358 (fcn_cs_saved
.c_value
+ off
,
1359 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1360 if (newobj
->name
!= NULL
)
1361 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1363 else if (strcmp (cs
->c_name
, ".ef") == 0)
1365 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1366 0, cs
->c_naux
, &main_aux
);
1368 /* The value of .ef is the address of epilogue code;
1369 not useful for gdb. */
1370 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1371 contains number of lines to '}' */
1373 if (context_stack_depth
<= 0)
1374 { /* We attempted to pop an empty context stack. */
1375 ef_complaint (cs
->c_symnum
);
1376 within_function
= 0;
1379 newobj
= pop_context ();
1380 /* Stack must be empty now. */
1381 if (context_stack_depth
> 0 || newobj
== NULL
)
1383 ef_complaint (cs
->c_symnum
);
1384 within_function
= 0;
1388 finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
1389 NULL
, newobj
->start_addr
,
1390 (fcn_cs_saved
.c_value
1391 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1392 + ANOFFSET (objfile
->section_offsets
,
1393 SECT_OFF_TEXT (objfile
))));
1394 within_function
= 0;
1399 /* Begin static block. */
1401 struct internal_syment symbol
;
1403 read_symbol (&symbol
, cs
->c_value
);
1404 static_block_base
= symbol
.n_value
;
1405 static_block_section
=
1406 secnum_to_section (symbol
.n_scnum
, objfile
);
1411 /* End of static block. */
1412 static_block_base
= 0;
1413 static_block_section
= -1;
1424 complaint (&symfile_complaints
,
1425 _("Unrecognized storage class %d."),
1440 /* beginning of include file */
1441 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1442 order. Thus, when wee see them, we might not know enough info
1443 to process them. Thus, we'll be saving them into a table
1444 (inclTable) and postpone their processing. */
1446 record_include_begin (cs
);
1450 /* End of include file. */
1451 /* See the comment after case C_BINCL. */
1452 record_include_end (cs
);
1456 if (strcmp (cs
->c_name
, ".bb") == 0)
1459 newobj
= push_context (depth
,
1461 + ANOFFSET (objfile
->section_offsets
,
1462 SECT_OFF_TEXT (objfile
))));
1464 else if (strcmp (cs
->c_name
, ".eb") == 0)
1466 if (context_stack_depth
<= 0)
1467 { /* We attempted to pop an empty context stack. */
1468 eb_complaint (cs
->c_symnum
);
1471 newobj
= pop_context ();
1472 if (depth
-- != newobj
->depth
)
1474 eb_complaint (cs
->c_symnum
);
1477 if (local_symbols
&& context_stack_depth
> 0)
1479 /* Make a block for the local symbols within. */
1480 finish_block (newobj
->name
, &local_symbols
,
1481 newobj
->old_blocks
, NULL
,
1484 + ANOFFSET (objfile
->section_offsets
,
1485 SECT_OFF_TEXT (objfile
))));
1487 local_symbols
= newobj
->locals
;
1492 process_xcoff_symbol (cs
, objfile
);
1497 if (get_last_source_file ())
1499 struct compunit_symtab
*cust
;
1501 complete_symtab (filestring
, file_start_addr
);
1502 cur_src_end_addr
= file_end_addr
;
1503 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1504 /* When reading symbols for the last C_FILE of the objfile, try
1505 to make sure that we set pst->compunit_symtab to the symtab for the
1506 file, not to the _globals_ symtab. I'm not sure whether this
1507 actually works right or when/if it comes up. */
1508 if (pst
->compunit_symtab
== NULL
)
1509 pst
->compunit_symtab
= cust
;
1514 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1515 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1516 *(SYMBOL2) = *(SYMBOL1);
1519 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1520 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1521 (NAME), strlen (NAME)))
1524 /* process one xcoff symbol. */
1526 static struct symbol
*
1527 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1529 struct symbol onesymbol
;
1530 struct symbol
*sym
= &onesymbol
;
1531 struct symbol
*sym2
= NULL
;
1537 if (cs
->c_secnum
< 0)
1539 /* The value is a register number, offset within a frame, etc.,
1540 and does not get relocated. */
1546 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1547 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1554 initialize_objfile_symbol (sym
);
1556 /* default assumptions */
1557 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1558 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1559 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1561 if (ISFCN (cs
->c_type
))
1563 /* At this point, we don't know the type of the function. This
1564 will be patched with the type from its stab entry later on in
1565 patch_block_stabs (), unless the file was compiled without -g. */
1567 SYMBOL_SET_LINKAGE_NAME (sym
, ((const char *)
1568 SYMNAME_ALLOC (name
, symname_alloced
)));
1569 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1571 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1572 SYMBOL_DUP (sym
, sym2
);
1574 if (cs
->c_sclass
== C_EXT
)
1575 add_symbol_to_list (sym2
, &global_symbols
);
1576 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1577 add_symbol_to_list (sym2
, &file_symbols
);
1581 /* In case we can't figure out the type, provide default. */
1582 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1584 switch (cs
->c_sclass
)
1587 /* The values of functions and global symbols are now resolved
1588 via the global_sym_chain in stabsread.c. */
1590 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1591 add_stab_to_list (name
, &global_stabs
);
1593 add_stab_to_list (name
, &file_stabs
);
1597 add_stab_to_list (name
, &global_stabs
);
1602 common_block_start (cs
->c_name
, objfile
);
1606 common_block_end (objfile
);
1610 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1623 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1626 SYMBOL_SECTION (sym
) = sec
;
1633 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1634 all statics and we need to distinguish file-scope versus
1635 function-scope using within_function. We do this by
1636 changing the string we pass to define_symbol to use 'S'
1637 where we need to, which is not necessarily super-clean,
1638 but seems workable enough. */
1643 pp
= strchr (name
, ':');
1648 if (*pp
== 'V' && !within_function
)
1650 sym
= define_symbol ((cs
->c_value
1651 + ANOFFSET (objfile
->section_offsets
,
1652 static_block_section
)),
1653 cs
->c_name
, 0, 0, objfile
);
1656 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1657 SYMBOL_SECTION (sym
) = static_block_section
;
1666 /* Extract the file name from the aux entry of a C_FILE symbol.
1667 Result is in static storage and is only good for temporary use. */
1670 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1672 static char buffer
[BUFSIZ
];
1674 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1675 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1676 + aux_entry
->x_file
.x_n
.x_offset
));
1679 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1680 buffer
[FILNMLEN
] = '\0';
1685 /* Set *SYMBOL to symbol number symno in symtbl. */
1687 read_symbol (struct internal_syment
*symbol
, int symno
)
1689 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1690 int nsyms
= xcoff
->symtbl_num_syms
;
1691 char *stbl
= xcoff
->symtbl
;
1693 if (symno
< 0 || symno
>= nsyms
)
1695 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1696 symbol
->n_value
= 0;
1697 symbol
->n_scnum
= -1;
1700 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1701 stbl
+ (symno
* local_symesz
),
1705 /* Get value corresponding to symbol number symno in symtbl. */
1708 read_symbol_nvalue (int symno
)
1710 struct internal_syment symbol
[1];
1712 read_symbol (symbol
, symno
);
1713 return symbol
->n_value
;
1717 /* Find the address of the function corresponding to symno, where
1718 symno is the symbol pointed to by the linetable. */
1721 read_symbol_lineno (int symno
)
1723 struct objfile
*objfile
= this_symtab_objfile
;
1724 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1726 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1727 int nsyms
= info
->symtbl_num_syms
;
1728 char *stbl
= info
->symtbl
;
1729 char *strtbl
= info
->strtbl
;
1731 struct internal_syment symbol
[1];
1732 union internal_auxent main_aux
[1];
1736 bf_notfound_complaint ();
1740 /* Note that just searching for a short distance (e.g. 50 symbols)
1741 is not enough, at least in the following case.
1744 [many .stabx entries]
1745 [a few functions, referring to foo]
1749 What happens here is that the assembler moves the .stabx entries
1750 to right before the ".bf" for foo, but the symbol for "foo" is before
1751 all the stabx entries. See PR gdb/2222. */
1753 /* Maintaining a table of .bf entries might be preferable to this search.
1754 If I understand things correctly it would need to be done only for
1755 the duration of a single psymtab to symtab conversion. */
1756 while (symno
< nsyms
)
1758 bfd_coff_swap_sym_in (symfile_bfd
,
1759 stbl
+ (symno
* local_symesz
), symbol
);
1760 if (symbol
->n_sclass
== C_FCN
)
1762 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1764 if (strcmp (name
, ".bf") == 0)
1767 symno
+= symbol
->n_numaux
+ 1;
1770 bf_notfound_complaint ();
1774 /* Take aux entry and return its lineno. */
1776 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1777 symbol
->n_type
, symbol
->n_sclass
,
1778 0, symbol
->n_numaux
, main_aux
);
1780 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1783 /* Support for line number handling. */
1785 /* This function is called for every section; it finds the outer limits
1786 * of the line table (minimum and maximum file offset) so that the
1787 * mainline code can read the whole thing for efficiency.
1790 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1792 struct coff_symfile_info
*info
;
1794 file_ptr offset
, maxoff
;
1796 count
= asect
->lineno_count
;
1798 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1801 size
= count
* coff_data (abfd
)->local_linesz
;
1802 info
= (struct coff_symfile_info
*) vpinfo
;
1803 offset
= asect
->line_filepos
;
1804 maxoff
= offset
+ size
;
1806 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1807 info
->min_lineno_offset
= offset
;
1809 if (maxoff
> info
->max_lineno_offset
)
1810 info
->max_lineno_offset
= maxoff
;
1814 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1816 struct cleanup
*old_chain
;
1825 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1830 /* Read in all partial symtabs on which this one is dependent. */
1831 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1832 if (!pst
->dependencies
[i
]->readin
)
1834 /* Inform about additional files that need to be read in. */
1837 fputs_filtered (" ", gdb_stdout
);
1839 fputs_filtered ("and ", gdb_stdout
);
1841 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1842 wrap_here (""); /* Flush output */
1843 gdb_flush (gdb_stdout
);
1845 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1848 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1850 /* Init stuff necessary for reading in symbols. */
1853 old_chain
= make_cleanup (really_free_pendings
, 0);
1855 read_xcoff_symtab (objfile
, pst
);
1857 do_cleanups (old_chain
);
1863 /* Read in all of the symbols for a given psymtab for real.
1864 Be verbose about it if the user wants that. SELF is not NULL. */
1867 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1872 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1877 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1878 || self
->number_of_dependencies
)
1880 /* Print the message now, before reading the string table,
1881 to avoid disconcerting pauses. */
1884 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1885 gdb_flush (gdb_stdout
);
1888 next_symbol_text_func
= xcoff_next_symbol_text
;
1890 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1892 /* Match with global symbols. This only needs to be done once,
1893 after all of the symtabs and dependencies have been read in. */
1894 scan_file_globals (objfile
);
1896 /* Finish up the debug error message. */
1898 printf_filtered ("done.\n");
1903 xcoff_new_init (struct objfile
*objfile
)
1905 stabsread_new_init ();
1906 buildsym_new_init ();
1909 /* Do initialization in preparation for reading symbols from OBJFILE.
1911 We will only be called if this is an XCOFF or XCOFF-like file.
1912 BFD handles figuring out the format of the file, and code in symfile.c
1913 uses BFD's determination to vector to us. */
1916 xcoff_symfile_init (struct objfile
*objfile
)
1918 struct coff_symfile_info
*xcoff
;
1920 /* Allocate struct to keep track of the symfile. */
1921 xcoff
= XNEW (struct coff_symfile_info
);
1922 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1924 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1925 find this causes a significant slowdown in gdb then we could
1926 set it in the debug symbol readers only when necessary. */
1927 objfile
->flags
|= OBJF_REORDERED
;
1930 /* Perform any local cleanups required when we are done with a particular
1931 objfile. I.E, we are in the process of discarding all symbol information
1932 for an objfile, freeing up all memory held for it, and unlinking the
1933 objfile struct from the global list of known objfiles. */
1936 xcoff_symfile_finish (struct objfile
*objfile
)
1938 /* Start with a fresh include table for the next objfile. */
1944 inclIndx
= inclLength
= inclDepth
= 0;
1946 dwarf2_free_objfile (objfile
);
1951 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1955 unsigned char lengthbuf
[4];
1957 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1959 xcoff
->strtbl
= NULL
;
1961 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1962 error (_("cannot seek to string table in %s: %s"),
1963 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1965 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1966 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1968 /* If no string table is needed, then the file may end immediately
1969 after the symbols. Just return with `strtbl' set to NULL. */
1971 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1974 /* Allocate string table from objfile_obstack. We will need this table
1975 as long as we have its symbol table around. */
1977 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1978 xcoff
->strtbl
= strtbl
;
1980 /* Copy length buffer, the first byte is usually zero and is
1981 used for stabs with a name length of zero. */
1982 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1983 if (length
== sizeof lengthbuf
)
1986 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1988 if (val
!= length
- sizeof lengthbuf
)
1989 error (_("cannot read string table from %s: %s"),
1990 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1991 if (strtbl
[length
- 1] != '\0')
1992 error (_("bad symbol file: string table "
1993 "does not end with null character"));
1998 /* If we have not yet seen a function for this psymtab, this is 0. If we
1999 have seen one, it is the offset in the line numbers of the line numbers
2001 static unsigned int first_fun_line_offset
;
2003 /* Allocate and partially fill a partial symtab. It will be
2004 completely filled at the end of the symbol list.
2006 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2007 is the address relative to which its symbols are (incremental) or 0
2010 static struct partial_symtab
*
2011 xcoff_start_psymtab (struct objfile
*objfile
,
2012 const char *filename
, int first_symnum
,
2013 struct partial_symbol
**global_syms
,
2014 struct partial_symbol
**static_syms
)
2016 struct partial_symtab
*result
=
2017 start_psymtab_common (objfile
,
2019 /* We fill in textlow later. */
2021 global_syms
, static_syms
);
2023 result
->read_symtab_private
=
2024 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2025 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2026 result
->read_symtab
= xcoff_read_symtab
;
2028 /* Deduce the source language from the filename for this psymtab. */
2029 psymtab_language
= deduce_language_from_filename (filename
);
2034 /* Close off the current usage of PST.
2035 Returns PST, or NULL if the partial symtab was empty and thrown away.
2037 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2039 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2040 are the information for includes and dependencies. */
2042 static struct partial_symtab
*
2043 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2044 const char **include_list
, int num_includes
,
2045 int capping_symbol_number
,
2046 struct partial_symtab
**dependency_list
,
2047 int number_dependencies
, int textlow_not_set
)
2051 if (capping_symbol_number
!= -1)
2052 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2053 capping_symbol_number
2054 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2055 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2056 first_fun_line_offset
;
2057 first_fun_line_offset
= 0;
2059 end_psymtab_common (objfile
, pst
);
2061 pst
->number_of_dependencies
= number_dependencies
;
2062 if (number_dependencies
)
2064 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2065 struct partial_symtab
*,
2066 number_dependencies
);
2067 memcpy (pst
->dependencies
, dependency_list
,
2068 number_dependencies
* sizeof (struct partial_symtab
*));
2071 pst
->dependencies
= 0;
2073 for (i
= 0; i
< num_includes
; i
++)
2075 struct partial_symtab
*subpst
=
2076 allocate_psymtab (include_list
[i
], objfile
);
2078 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2079 sizeof (struct symloc
));
2080 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2081 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2082 subpst
->textlow
= 0;
2083 subpst
->texthigh
= 0;
2085 /* We could save slight bits of space by only making one of these,
2086 shared by the entire set of include files. FIXME-someday. */
2087 subpst
->dependencies
=
2088 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2089 subpst
->dependencies
[0] = pst
;
2090 subpst
->number_of_dependencies
= 1;
2092 subpst
->globals_offset
=
2093 subpst
->n_global_syms
=
2094 subpst
->statics_offset
=
2095 subpst
->n_static_syms
= 0;
2098 subpst
->compunit_symtab
= NULL
;
2099 subpst
->read_symtab
= pst
->read_symtab
;
2102 if (num_includes
== 0
2103 && number_dependencies
== 0
2104 && pst
->n_global_syms
== 0
2105 && pst
->n_static_syms
== 0)
2107 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2108 it is on the obstack, but we can forget to chain it on the list. */
2109 /* Empty psymtabs happen as a result of header files which don't have
2110 any symbols in them. There can be a lot of them. */
2112 discard_psymtab (objfile
, pst
);
2114 /* Indicate that psymtab was thrown away. */
2120 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2121 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2122 the symbol and its auxents. */
2125 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2126 const char **name
, char **raw
, unsigned int *symnump
,
2127 struct objfile
*objfile
)
2129 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2130 if (symbol
->n_zeroes
)
2132 /* If it's exactly E_SYMNMLEN characters long it isn't
2134 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2136 /* FIXME: wastes memory for symbols which we don't end up putting
2137 into the minimal symbols. */
2140 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2142 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2143 p
[E_SYMNMLEN
] = '\0';
2147 /* Point to the unswapped name as that persists as long as the
2149 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2151 else if (symbol
->n_sclass
& 0x80)
2153 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2157 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2160 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2161 if (symbol
->n_numaux
> 0)
2163 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2164 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2166 *symnump
+= symbol
->n_numaux
;
2167 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2172 function_outside_compilation_unit_complaint (const char *arg1
)
2174 complaint (&symfile_complaints
,
2175 _("function `%s' appears to be defined "
2176 "outside of all compilation units"),
2181 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2182 struct objfile
*objfile
)
2184 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2185 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2186 const char *filestring
= NULL
;
2188 const char *namestring
;
2193 /* Current partial symtab */
2194 struct partial_symtab
*pst
;
2196 /* List of current psymtab's include files. */
2197 const char **psymtab_include_list
;
2198 int includes_allocated
;
2201 /* Index within current psymtab dependency list. */
2202 struct partial_symtab
**dependency_list
;
2203 int dependencies_used
, dependencies_allocated
;
2206 struct internal_syment symbol
;
2207 union internal_auxent main_aux
[5];
2208 unsigned int ssymnum
;
2210 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2211 CORE_ADDR last_csect_val
= 0;
2212 int last_csect_sec
= 0;
2213 int misc_func_recorded
= 0; /* true if any misc. function. */
2214 int textlow_not_set
= 1;
2216 pst
= (struct partial_symtab
*) 0;
2218 includes_allocated
= 30;
2220 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2221 sizeof (const char *));
2223 dependencies_allocated
= 30;
2224 dependencies_used
= 0;
2226 (struct partial_symtab
**) alloca (dependencies_allocated
*
2227 sizeof (struct partial_symtab
*));
2229 set_last_source_file (NULL
);
2231 abfd
= objfile
->obfd
;
2232 next_symbol_text_func
= xcoff_next_symbol_text
;
2234 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2235 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2237 while (ssymnum
< nsyms
)
2243 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2244 sclass
= symbol
.n_sclass
;
2251 /* The CSECT auxent--always the last auxent. */
2252 union internal_auxent csect_aux
;
2253 unsigned int symnum_before
= ssymnum
;
2255 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2257 if (symbol
.n_numaux
> 1)
2259 bfd_coff_swap_aux_in
2261 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2264 symbol
.n_numaux
- 1,
2269 csect_aux
= main_aux
[0];
2271 /* If symbol name starts with ".$" or "$", ignore it. */
2272 if (namestring
[0] == '$'
2273 || (namestring
[0] == '.' && namestring
[1] == '$'))
2276 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2279 switch (csect_aux
.x_csect
.x_smclas
)
2282 if (last_csect_name
)
2284 /* If no misc. function recorded in the last
2285 seen csect, enter it as a function. This
2286 will take care of functions like strcmp()
2289 if (!misc_func_recorded
)
2291 record_minimal_symbol
2292 (reader
, last_csect_name
, last_csect_val
,
2293 mst_text
, last_csect_sec
, objfile
);
2294 misc_func_recorded
= 1;
2299 /* We have to allocate one psymtab for
2300 each program csect, because their text
2301 sections need not be adjacent. */
2303 (objfile
, pst
, psymtab_include_list
,
2304 includes_used
, symnum_before
, dependency_list
,
2305 dependencies_used
, textlow_not_set
);
2307 dependencies_used
= 0;
2308 /* Give all psymtabs for this source file the same
2310 pst
= xcoff_start_psymtab
2314 objfile
->global_psymbols
.next
,
2315 objfile
->static_psymbols
.next
);
2318 /* Activate the misc_func_recorded mechanism for
2319 compiler- and linker-generated CSECTs like ".strcmp"
2321 if (namestring
&& (namestring
[0] == '.'
2322 || namestring
[0] == '@'))
2324 last_csect_name
= namestring
;
2325 last_csect_val
= symbol
.n_value
;
2326 last_csect_sec
= symbol
.n_scnum
;
2331 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2333 if (highval
> pst
->texthigh
)
2334 pst
->texthigh
= highval
;
2335 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2336 pst
->textlow
= symbol
.n_value
;
2338 misc_func_recorded
= 0;
2343 /* Data variables are recorded in the minimal symbol
2344 table, except for section symbols. */
2345 if (*namestring
!= '.')
2346 record_minimal_symbol
2347 (reader
, namestring
, symbol
.n_value
,
2348 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2349 symbol
.n_scnum
, objfile
);
2354 warning (_("More than one XMC_TC0 symbol found."));
2355 toc_offset
= symbol
.n_value
;
2357 /* Make TOC offset relative to start address of
2359 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2361 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2365 /* These symbols tell us where the TOC entry for a
2366 variable is, not the variable itself. */
2375 switch (csect_aux
.x_csect
.x_smclas
)
2378 /* A function entry point. */
2380 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2381 first_fun_line_offset
=
2382 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2384 record_minimal_symbol
2385 (reader
, namestring
, symbol
.n_value
,
2386 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2387 symbol
.n_scnum
, objfile
);
2388 misc_func_recorded
= 1;
2392 /* shared library function trampoline code entry
2395 /* record trampoline code entries as
2396 mst_solib_trampoline symbol. When we lookup mst
2397 symbols, we will choose mst_text over
2398 mst_solib_trampoline. */
2399 record_minimal_symbol
2400 (reader
, namestring
, symbol
.n_value
,
2401 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2402 misc_func_recorded
= 1;
2406 /* The symbols often have the same names as
2407 debug symbols for functions, and confuse
2413 /* xlc puts each variable in a separate csect,
2414 so we get an XTY_SD for each variable. But
2415 gcc puts several variables in a csect, so
2416 that each variable only gets an XTY_LD. We
2417 still need to record them. This will
2418 typically be XMC_RW; I suspect XMC_RO and
2419 XMC_BS might be possible too. */
2420 if (*namestring
!= '.')
2421 record_minimal_symbol
2422 (reader
, namestring
, symbol
.n_value
,
2423 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2424 symbol
.n_scnum
, objfile
);
2430 switch (csect_aux
.x_csect
.x_smclas
)
2434 /* Common variables are recorded in the minimal symbol
2435 table, except for section symbols. */
2436 if (*namestring
!= '.')
2437 record_minimal_symbol
2438 (reader
, namestring
, symbol
.n_value
,
2439 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2440 symbol
.n_scnum
, objfile
);
2452 unsigned int symnum_before
;
2454 symnum_before
= ssymnum
;
2455 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2458 /* See if the last csect needs to be recorded. */
2460 if (last_csect_name
&& !misc_func_recorded
)
2462 /* If no misc. function recorded in the last seen csect, enter
2463 it as a function. This will take care of functions like
2464 strcmp() compiled by xlc. */
2466 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2467 mst_text
, last_csect_sec
, objfile
);
2468 misc_func_recorded
= 1;
2473 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2474 includes_used
, symnum_before
,
2475 dependency_list
, dependencies_used
,
2478 dependencies_used
= 0;
2480 first_fun_line_offset
= 0;
2482 /* XCOFF, according to the AIX 3.2 documentation, puts the
2483 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2484 do things the standard COFF way and put it in the auxent.
2485 We use the auxent if the symbol is ".file" and an auxent
2486 exists, otherwise use the symbol itself. */
2487 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2489 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2492 filestring
= namestring
;
2494 pst
= xcoff_start_psymtab (objfile
,
2497 objfile
->global_psymbols
.next
,
2498 objfile
->static_psymbols
.next
);
2499 last_csect_name
= NULL
;
2505 complaint (&symfile_complaints
,
2506 _("Storage class %d not recognized during scan"),
2511 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2512 to handle only the C_FUN and C_EXT. */
2527 /* C_EINCL means we are switching back to the main file. But there
2528 is no reason to care; the only thing we want to know about
2529 includes is the names of all the included (.h) files. */
2534 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2538 /* I don't think the name of the common block (as opposed to the
2539 variables within it) is something which is user visible
2547 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2548 so C_LSYM would appear to be only for locals. */
2554 /* We probably could save a few instructions by assuming that
2555 C_LSYM, C_PSYM, etc., never have auxents. */
2556 int naux1
= symbol
.n_numaux
+ 1;
2559 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2565 /* Mark down an include file in the current psymtab. */
2566 enum language tmp_language
;
2568 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2571 tmp_language
= deduce_language_from_filename (namestring
);
2573 /* Only change the psymtab's language if we've learned
2574 something useful (eg. tmp_language is not language_unknown).
2575 In addition, to match what start_subfile does, never change
2577 if (tmp_language
!= language_unknown
2578 && (tmp_language
!= language_c
2579 || psymtab_language
!= language_cplus
))
2580 psymtab_language
= tmp_language
;
2582 /* In C++, one may expect the same filename to come round many
2583 times, when code is coming alternately from the main file
2584 and from inline functions in other files. So I check to see
2585 if this is a file we've seen before -- either the main
2586 source file, or a previously included file.
2588 This seems to be a lot of time to be spending on N_SOL, but
2589 things like "break c-exp.y:435" need to work (I
2590 suppose the psymtab_include_list could be hashed or put
2591 in a binary tree, if profiling shows this is a major hog). */
2592 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2598 for (i
= 0; i
< includes_used
; i
++)
2599 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2607 psymtab_include_list
[includes_used
++] = namestring
;
2608 if (includes_used
>= includes_allocated
)
2610 const char **orig
= psymtab_include_list
;
2612 psymtab_include_list
= (const char **)
2613 alloca ((includes_allocated
*= 2) *
2614 sizeof (const char *));
2615 memcpy (psymtab_include_list
, orig
,
2616 includes_used
* sizeof (const char *));
2621 /* The value of the C_FUN is not the address of the function (it
2622 appears to be the address before linking), but as long as it
2623 is smaller than the actual address, then find_pc_partial_function
2624 will use the minimal symbols instead. I hope. */
2633 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2636 p
= strchr (namestring
, ':');
2638 continue; /* Not a debugging symbol. */
2640 /* Main processing section for debugging symbols which
2641 the initial read through the symbol tables needs to worry
2642 about. If we reach this point, the symbol which we are
2643 considering is definitely one we are interested in.
2644 p must also contain the (valid) index into the namestring
2645 which indicates the debugging type symbol. */
2650 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2651 SECT_OFF_DATA (objfile
));
2653 if (gdbarch_static_transform_name_p (gdbarch
))
2654 namestring
= gdbarch_static_transform_name
2655 (gdbarch
, namestring
);
2657 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2658 VAR_DOMAIN
, LOC_STATIC
,
2659 &objfile
->static_psymbols
,
2661 psymtab_language
, objfile
);
2665 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2666 SECT_OFF_DATA (objfile
));
2667 /* The addresses in these entries are reported to be
2668 wrong. See the code that reads 'G's for symtabs. */
2669 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2670 VAR_DOMAIN
, LOC_STATIC
,
2671 &objfile
->global_psymbols
,
2673 psymtab_language
, objfile
);
2677 /* When a 'T' entry is defining an anonymous enum, it
2678 may have a name which is the empty string, or a
2679 single space. Since they're not really defining a
2680 symbol, those shouldn't go in the partial symbol
2681 table. We do pick up the elements of such enums at
2682 'check_enum:', below. */
2683 if (p
>= namestring
+ 2
2684 || (p
== namestring
+ 1
2685 && namestring
[0] != ' '))
2687 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2688 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2689 &objfile
->static_psymbols
,
2690 0, psymtab_language
, objfile
);
2693 /* Also a typedef with the same name. */
2694 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2695 VAR_DOMAIN
, LOC_TYPEDEF
,
2696 &objfile
->static_psymbols
,
2697 0, psymtab_language
, objfile
);
2704 if (p
!= namestring
) /* a name is there, not just :T... */
2706 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2707 VAR_DOMAIN
, LOC_TYPEDEF
,
2708 &objfile
->static_psymbols
,
2709 0, psymtab_language
, objfile
);
2712 /* If this is an enumerated type, we need to
2713 add all the enum constants to the partial symbol
2714 table. This does not cover enums without names, e.g.
2715 "enum {a, b} c;" in C, but fortunately those are
2716 rare. There is no way for GDB to find those from the
2717 enum type without spending too much time on it. Thus
2718 to solve this problem, the compiler needs to put out the
2719 enum in a nameless type. GCC2 does this. */
2721 /* We are looking for something of the form
2722 <name> ":" ("t" | "T") [<number> "="] "e"
2723 {<constant> ":" <value> ","} ";". */
2725 /* Skip over the colon and the 't' or 'T'. */
2727 /* This type may be given a number. Also, numbers can come
2728 in pairs like (0,26). Skip over it. */
2729 while ((*p
>= '0' && *p
<= '9')
2730 || *p
== '(' || *p
== ',' || *p
== ')'
2736 /* The aix4 compiler emits extra crud before the
2740 /* Skip over the type (?). */
2744 /* Skip over the colon. */
2748 /* We have found an enumerated type. */
2749 /* According to comments in read_enum_type
2750 a comma could end it instead of a semicolon.
2751 I don't know where that happens.
2753 while (*p
&& *p
!= ';' && *p
!= ',')
2757 /* Check for and handle cretinous dbx symbol name
2759 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2760 p
= next_symbol_text (objfile
);
2762 /* Point to the character after the name
2763 of the enum constant. */
2764 for (q
= p
; *q
&& *q
!= ':'; q
++)
2766 /* Note that the value doesn't matter for
2767 enum constants in psymtabs, just in symtabs. */
2768 add_psymbol_to_list (p
, q
- p
, 1,
2769 VAR_DOMAIN
, LOC_CONST
,
2770 &objfile
->static_psymbols
,
2771 0, psymtab_language
, objfile
);
2772 /* Point past the name. */
2774 /* Skip over the value. */
2775 while (*p
&& *p
!= ',')
2777 /* Advance past the comma. */
2785 /* Constant, e.g. from "const" in Pascal. */
2786 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2787 VAR_DOMAIN
, LOC_CONST
,
2788 &objfile
->static_psymbols
,
2789 0, psymtab_language
, objfile
);
2795 int name_len
= p
- namestring
;
2796 char *name
= (char *) xmalloc (name_len
+ 1);
2798 memcpy (name
, namestring
, name_len
);
2799 name
[name_len
] = '\0';
2800 function_outside_compilation_unit_complaint (name
);
2803 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2804 SECT_OFF_TEXT (objfile
));
2805 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2806 VAR_DOMAIN
, LOC_BLOCK
,
2807 &objfile
->static_psymbols
,
2809 psymtab_language
, objfile
);
2812 /* Global functions were ignored here, but now they
2813 are put into the global psymtab like one would expect.
2814 They're also in the minimal symbol table. */
2818 int name_len
= p
- namestring
;
2819 char *name
= (char *) xmalloc (name_len
+ 1);
2821 memcpy (name
, namestring
, name_len
);
2822 name
[name_len
] = '\0';
2823 function_outside_compilation_unit_complaint (name
);
2827 /* We need only the minimal symbols for these
2828 loader-generated definitions. Keeping the global
2829 symbols leads to "in psymbols but not in symbols"
2831 if (startswith (namestring
, "@FIX"))
2834 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2835 SECT_OFF_TEXT (objfile
));
2836 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2837 VAR_DOMAIN
, LOC_BLOCK
,
2838 &objfile
->global_psymbols
,
2840 psymtab_language
, objfile
);
2843 /* Two things show up here (hopefully); static symbols of
2844 local scope (static used inside braces) or extensions
2845 of structure symbols. We can ignore both. */
2859 case '#': /* For symbol identification (used in
2864 /* It is a C++ nested symbol. We don't need to record it
2865 (I don't think); if we try to look up foo::bar::baz,
2866 then symbols for the symtab containing foo should get
2867 read in, I think. */
2868 /* Someone says sun cc puts out symbols like
2869 /foo/baz/maclib::/usr/local/bin/maclib,
2870 which would get here with a symbol type of ':'. */
2874 /* Unexpected symbol descriptor. The second and
2875 subsequent stabs of a continued stab can show up
2876 here. The question is whether they ever can mimic
2877 a normal stab--it would be nice if not, since we
2878 certainly don't want to spend the time searching to
2879 the end of every string looking for a
2882 complaint (&symfile_complaints
,
2883 _("unknown symbol descriptor `%c'"), p
[1]);
2885 /* Ignore it; perhaps it is an extension that we don't
2895 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2896 ssymnum
, dependency_list
,
2897 dependencies_used
, textlow_not_set
);
2900 /* Record the toc offset value of this symbol table into objfile
2901 structure. If no XMC_TC0 is found, toc_offset should be zero.
2902 Another place to obtain this information would be file auxiliary
2905 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2908 /* Return the toc offset value for a given objfile. */
2911 xcoff_get_toc_offset (struct objfile
*objfile
)
2914 return XCOFF_DATA (objfile
)->toc_offset
;
2918 /* Scan and build partial symbols for a symbol file.
2919 We have been initialized by a call to dbx_symfile_init, which
2920 put all the relevant info into a "struct dbx_symfile_info",
2921 hung off the objfile structure.
2923 SECTION_OFFSETS contains offsets relative to which the symbols in the
2924 various sections are (depending where the sections were actually
2928 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2932 struct cleanup
*back_to
;
2933 int num_symbols
; /* # of symbols */
2934 file_ptr symtab_offset
; /* symbol table and */
2935 file_ptr stringtab_offset
; /* string table file offsets */
2936 struct coff_symfile_info
*info
;
2940 info
= XCOFF_DATA (objfile
);
2941 symfile_bfd
= abfd
= objfile
->obfd
;
2942 name
= objfile_name (objfile
);
2944 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2945 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2946 stringtab_offset
= symtab_offset
+
2947 num_symbols
* coff_data (abfd
)->local_symesz
;
2949 info
->min_lineno_offset
= 0;
2950 info
->max_lineno_offset
= 0;
2951 bfd_map_over_sections (abfd
, find_linenos
, info
);
2953 if (num_symbols
> 0)
2955 /* Read the string table. */
2956 init_stringtab (abfd
, stringtab_offset
, objfile
);
2958 /* Read the .debug section, if present. */
2960 struct bfd_section
*secp
;
2961 bfd_size_type length
;
2962 bfd_byte
*debugsec
= NULL
;
2964 secp
= bfd_get_section_by_name (abfd
, ".debug");
2967 length
= bfd_section_size (abfd
, secp
);
2971 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2974 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2976 error (_("Error reading .debug section of `%s': %s"),
2977 name
, bfd_errmsg (bfd_get_error ()));
2981 info
->debugsec
= (char *) debugsec
;
2985 /* Read the symbols. We keep them in core because we will want to
2986 access them randomly in read_symbol*. */
2987 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2989 error (_("Error reading symbols from %s: %s"),
2990 name
, bfd_errmsg (bfd_get_error ()));
2991 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2992 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2993 info
->symtbl_num_syms
= num_symbols
;
2995 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2997 perror_with_name (_("reading symbol table"));
2999 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3000 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3001 /* I'm not sure how how good num_symbols is; the rule of thumb in
3002 init_psymbol_list was developed for a.out. On the one hand,
3003 num_symbols includes auxents. On the other hand, it doesn't
3005 init_psymbol_list (objfile
, num_symbols
);
3007 free_pending_blocks ();
3008 back_to
= make_cleanup (really_free_pendings
, 0);
3010 minimal_symbol_reader
reader (objfile
);
3012 /* Now that the symbol table data of the executable file are all in core,
3013 process them and define symbols accordingly. */
3015 scan_xcoff_symtab (reader
, objfile
);
3017 /* Install any minimal symbols that have been collected as the current
3018 minimal symbols for this objfile. */
3022 /* DWARF2 sections. */
3024 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3025 dwarf2_build_psymtabs (objfile
);
3027 dwarf2_build_frame_info (objfile
);
3029 do_cleanups (back_to
);
3033 xcoff_symfile_offsets (struct objfile
*objfile
,
3034 const struct section_addr_info
*addrs
)
3036 const char *first_section_name
;
3038 default_symfile_offsets (objfile
, addrs
);
3040 /* Oneof the weird side-effects of default_symfile_offsets is that
3041 it sometimes sets some section indices to zero for sections that,
3042 in fact do not exist. See the body of default_symfile_offsets
3043 for more info on when that happens. Undo that, as this then allows
3044 us to test whether the associated section exists or not, and then
3045 access it quickly (without searching it again). */
3047 if (objfile
->num_sections
== 0)
3048 return; /* Is that even possible? Better safe than sorry. */
3051 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3053 if (objfile
->sect_index_text
== 0
3054 && strcmp (first_section_name
, ".text") != 0)
3055 objfile
->sect_index_text
= -1;
3057 if (objfile
->sect_index_data
== 0
3058 && strcmp (first_section_name
, ".data") != 0)
3059 objfile
->sect_index_data
= -1;
3061 if (objfile
->sect_index_bss
== 0
3062 && strcmp (first_section_name
, ".bss") != 0)
3063 objfile
->sect_index_bss
= -1;
3065 if (objfile
->sect_index_rodata
== 0
3066 && strcmp (first_section_name
, ".rodata") != 0)
3067 objfile
->sect_index_rodata
= -1;
3070 /* Register our ability to parse symbols for xcoff BFD files. */
3072 static const struct sym_fns xcoff_sym_fns
=
3075 /* It is possible that coff and xcoff should be merged as
3076 they do have fundamental similarities (for example, the extra storage
3077 classes used for stabs could presumably be recognized in any COFF file).
3078 However, in addition to obvious things like all the csect hair, there are
3079 some subtler differences between xcoffread.c and coffread.c, notably
3080 the fact that coffread.c has no need to read in all the symbols, but
3081 xcoffread.c reads all the symbols and does in fact randomly access them
3082 (in C_BSTAT and line number processing). */
3084 xcoff_new_init
, /* init anything gbl to entire symtab */
3085 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3086 xcoff_initial_scan
, /* read a symbol file into symtab */
3087 NULL
, /* sym_read_psymbols */
3088 xcoff_symfile_finish
, /* finished with file, cleanup */
3089 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3090 default_symfile_segments
, /* Get segment information from a file. */
3091 aix_process_linenos
,
3092 default_symfile_relocate
, /* Relocate a debug section. */
3093 NULL
, /* sym_probe_fns */
3097 /* Same as xcoff_get_n_import_files, but for core files. */
3100 xcoff_get_core_n_import_files (bfd
*abfd
)
3102 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3104 file_ptr offset
= 0;
3108 return -1; /* Not a core file. */
3110 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3116 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3118 next
= bfd_get_32 (abfd
, buf
);
3120 break; /* This is the last entry. */
3124 /* Return the number of entries, excluding the first one, which is
3125 the path to the executable that produced this core file. */
3126 return n_entries
- 1;
3129 /* Return the number of import files (shared libraries) that the given
3130 BFD depends on. Return -1 if this number could not be computed. */
3133 xcoff_get_n_import_files (bfd
*abfd
)
3135 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3139 /* If the ".loader" section does not exist, the objfile is probably
3140 not an executable. Might be a core file... */
3142 return xcoff_get_core_n_import_files (abfd
);
3144 /* The number of entries in the Import Files Table is stored in
3145 field l_nimpid. This field is always at offset 16, and is
3146 always 4 bytes long. Read those 4 bytes. */
3148 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3150 l_nimpid
= bfd_get_32 (abfd
, buf
);
3152 /* By convention, the first entry is the default LIBPATH value
3153 to be used by the system loader, so it does not count towards
3154 the number of import files. */
3155 return l_nimpid
- 1;
3158 /* Free the per-objfile xcoff data. */
3161 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3166 /* Provide a prototype to silence -Wmissing-prototypes. */
3167 extern initialize_file_ftype _initialize_xcoffread
;
3170 _initialize_xcoffread (void)
3172 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3174 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,