1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2014 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 /* Nonzero if within a function (so symbols should be local,
123 if nothing says specifically). */
127 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
128 there is any reason not to just use a #define, but might as well
129 ask BFD for the size and store it here, I guess. */
131 static unsigned local_symesz
;
133 struct coff_symfile_info
135 file_ptr min_lineno_offset
; /* Where in file lowest line#s are. */
136 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file. */
138 /* Pointer to the string table. */
141 /* Pointer to debug section. */
144 /* Pointer to the a.out symbol table. */
147 /* Number of symbols in symtbl. */
150 /* Offset in data section to TOC anchor. */
151 CORE_ADDR toc_offset
;
154 /* Convenience macro to access the per-objfile XCOFF data. */
156 #define XCOFF_DATA(objfile) \
157 ((struct coff_symfile_info *) objfile_data ((objfile), \
158 xcoff_objfile_data_key))
160 /* XCOFF names for dwarf sections. There is no compressed sections. */
162 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
164 { ".dwabrev", NULL
},
167 { NULL
, NULL
}, /* debug_macinfo */
168 { NULL
, NULL
}, /* debug_macro */
170 { ".dwrnges", NULL
},
171 { NULL
, NULL
}, /* debug_types */
172 { NULL
, NULL
}, /* debug_addr */
173 { ".dwframe", NULL
},
174 { NULL
, NULL
}, /* eh_frame */
175 { NULL
, NULL
}, /* gdb_index */
180 bf_notfound_complaint (void)
182 complaint (&symfile_complaints
,
183 _("line numbers off, `.bf' symbol not found"));
187 ef_complaint (int arg1
)
189 complaint (&symfile_complaints
,
190 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
194 eb_complaint (int arg1
)
196 complaint (&symfile_complaints
,
197 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
200 static void xcoff_initial_scan (struct objfile
*, int);
202 static void scan_xcoff_symtab (struct objfile
*);
204 static char *xcoff_next_symbol_text (struct objfile
*);
206 static void record_include_begin (struct coff_symbol
*);
209 enter_line_range (struct subfile
*, unsigned, unsigned,
210 CORE_ADDR
, CORE_ADDR
, unsigned *);
212 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
214 static void xcoff_symfile_init (struct objfile
*);
216 static void xcoff_new_init (struct objfile
*);
218 static void xcoff_symfile_finish (struct objfile
*);
220 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
222 static void read_symbol (struct internal_syment
*, int);
224 static int read_symbol_lineno (int);
226 static CORE_ADDR
read_symbol_nvalue (int);
228 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
231 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
234 static void add_stab_to_list (char *, struct pending_stabs
**);
237 static int compare_lte (const void *, const void *);
239 static struct linetable
*arrange_linetable (struct linetable
*);
241 static void record_include_end (struct coff_symbol
*);
243 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
246 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
248 static int secnum_to_section (int, struct objfile
*);
249 static asection
*secnum_to_bfd_section (int, struct objfile
*);
251 struct find_targ_sec_arg
256 struct objfile
*objfile
;
259 static void find_targ_sec (bfd
*, asection
*, void *);
262 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
264 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
265 struct objfile
*objfile
= args
->objfile
;
267 if (sect
->target_index
== args
->targ_index
)
269 /* This is the section. Figure out what SECT_OFF_* code it is. */
270 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
271 *args
->resultp
= SECT_OFF_TEXT (objfile
);
272 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
273 *args
->resultp
= SECT_OFF_DATA (objfile
);
275 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
276 *args
->bfd_sect
= sect
;
280 /* Search all BFD sections for the section whose target_index is
281 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
282 associated index in the objfile's section_offset table is also
285 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
286 is set to the text section's number. */
289 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
290 asection
**bfd_sect
, int *secnum
)
292 struct find_targ_sec_arg args
;
294 args
.targ_index
= n_scnum
;
295 args
.resultp
= secnum
;
296 args
.bfd_sect
= bfd_sect
;
297 args
.objfile
= objfile
;
300 *secnum
= SECT_OFF_TEXT (objfile
);
302 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
305 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
308 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
313 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
317 /* Return the BFD section that N_SCNUM points to. */
320 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
325 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
329 /* add a given stab string into given stab vector. */
334 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
336 if (*stabvector
== NULL
)
338 *stabvector
= (struct pending_stabs
*)
339 xmalloc (sizeof (struct pending_stabs
) +
340 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
341 (*stabvector
)->count
= 0;
342 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
344 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
346 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
347 *stabvector
= (struct pending_stabs
*)
348 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
349 (*stabvector
)->length
* sizeof (char *));
351 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
356 /* Linenos are processed on a file-by-file basis.
360 1) xlc (IBM's native c compiler) postpones static function code
361 emission to the end of a compilation unit. This way it can
362 determine if those functions (statics) are needed or not, and
363 can do some garbage collection (I think). This makes line
364 numbers and corresponding addresses unordered, and we end up
365 with a line table like:
382 and that breaks gdb's binary search on line numbers, if the
383 above table is not sorted on line numbers. And that sort
384 should be on function based, since gcc can emit line numbers
387 10 0x100 - for the init/test part of a for stmt.
390 10 0x400 - for the increment part of a for stmt.
392 arrange_linetable() will do this sorting.
394 2) aix symbol table might look like:
396 c_file // beginning of a new file
397 .bi // beginning of include file
398 .ei // end of include file
402 basically, .bi/.ei pairs do not necessarily encapsulate
403 their scope. They need to be recorded, and processed later
404 on when we come the end of the compilation unit.
405 Include table (inclTable) and process_linenos() handle
411 /* compare line table entry addresses. */
414 compare_lte (const void *lte1p
, const void *lte2p
)
416 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
417 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
419 return lte1
->pc
- lte2
->pc
;
422 /* Given a line table with function entries are marked, arrange its
423 functions in ascending order and strip off function entry markers
424 and return it in a newly created table. If the old one is good
425 enough, return the old one. */
426 /* FIXME: I think all this stuff can be replaced by just passing
427 sort_linevec = 1 to end_symtab. */
429 static struct linetable
*
430 arrange_linetable (struct linetable
*oldLineTb
)
432 int ii
, jj
, newline
, /* new line count */
433 function_count
; /* # of functions */
435 struct linetable_entry
*fentry
; /* function entry vector */
436 int fentry_size
; /* # of function entries */
437 struct linetable
*newLineTb
; /* new line table */
440 #define NUM_OF_FUNCTIONS 20
442 fentry_size
= NUM_OF_FUNCTIONS
;
443 fentry
= (struct linetable_entry
*)
444 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
446 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
448 if (oldLineTb
->item
[ii
].line
== 0)
449 { /* Function entry found. */
450 if (function_count
>= fentry_size
)
451 { /* Make sure you have room. */
453 fentry
= (struct linetable_entry
*)
455 fentry_size
* sizeof (struct linetable_entry
));
457 fentry
[function_count
].line
= ii
;
458 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
461 /* If the function was compiled with XLC, we may have to add an
462 extra line entry later. Reserve space for that. */
463 if (ii
+ 1 < oldLineTb
->nitems
464 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
469 if (function_count
== 0)
474 else if (function_count
> 1)
475 qsort (fentry
, function_count
,
476 sizeof (struct linetable_entry
), compare_lte
);
478 /* Allocate a new line table. */
479 newLineTb
= (struct linetable
*)
481 (sizeof (struct linetable
) +
482 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
484 /* If line table does not start with a function beginning, copy up until
488 if (oldLineTb
->item
[0].line
!= 0)
490 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
491 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
493 /* Now copy function lines one by one. */
495 for (ii
= 0; ii
< function_count
; ++ii
)
497 /* If the function was compiled with XLC, we may have to add an
498 extra line to cover the function prologue. */
499 jj
= fentry
[ii
].line
;
500 if (jj
+ 1 < oldLineTb
->nitems
501 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
503 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
504 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
508 for (jj
= fentry
[ii
].line
+ 1;
509 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
511 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
514 /* The number of items in the line table must include these
515 extra lines which were added in case of XLC compiled functions. */
516 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
520 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
521 following `IncludeChain'. At the end of each symtab (end_symtab),
522 we will determine if we should create additional symtab's to
523 represent if (the include files. */
526 typedef struct _inclTable
528 char *name
; /* include filename */
530 /* Offsets to the line table. end points to the last entry which is
531 part of this include file. */
534 struct subfile
*subfile
;
535 unsigned funStartLine
; /* Start line # of its function. */
539 #define INITIAL_INCLUDE_TABLE_LENGTH 20
540 static InclTable
*inclTable
; /* global include table */
541 static int inclIndx
; /* last entry to table */
542 static int inclLength
; /* table length */
543 static int inclDepth
; /* nested include depth */
545 static void allocate_include_entry (void);
548 record_include_begin (struct coff_symbol
*cs
)
552 /* In xcoff, we assume include files cannot be nested (not in .c files
553 of course, but in corresponding .s files.). */
555 /* This can happen with old versions of GCC.
556 GCC 2.3.3-930426 does not exhibit this on a test case which
557 a user said produced the message for him. */
558 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
562 allocate_include_entry ();
564 inclTable
[inclIndx
].name
= cs
->c_name
;
565 inclTable
[inclIndx
].begin
= cs
->c_value
;
569 record_include_end (struct coff_symbol
*cs
)
575 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
578 allocate_include_entry ();
580 pTbl
= &inclTable
[inclIndx
];
581 pTbl
->end
= cs
->c_value
;
588 allocate_include_entry (void)
590 if (inclTable
== NULL
)
592 inclTable
= (InclTable
*)
593 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
595 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
596 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
599 else if (inclIndx
>= inclLength
)
601 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
602 inclTable
= (InclTable
*)
603 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
604 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
605 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
609 /* Global variable to pass the psymtab down to all the routines involved
610 in psymtab to symtab processing. */
611 static struct partial_symtab
*this_symtab_psymtab
;
613 /* Objfile related to this_symtab_psymtab; set at the same time. */
614 static struct objfile
*this_symtab_objfile
;
616 /* given the start and end addresses of a compilation unit (or a csect,
617 at times) process its lines and create appropriate line vectors. */
620 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
624 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
626 /* subfile structure for the main compilation unit. */
627 struct subfile main_subfile
;
629 /* In the main source file, any time we see a function entry, we
630 reset this variable to function's absolute starting line number.
631 All the following line numbers in the function are relative to
632 this, and we record absolute line numbers in record_line(). */
634 unsigned int main_source_baseline
= 0;
639 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
641 goto return_after_cleanup
;
643 memset (&main_subfile
, '\0', sizeof (main_subfile
));
646 /* All source lines were in the main source file. None in include
649 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
650 &main_source_baseline
);
654 /* There was source with line numbers in include files. */
657 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
658 main_source_baseline
= 0;
660 for (ii
= 0; ii
< inclIndx
; ++ii
)
662 struct subfile
*tmpSubfile
;
664 /* If there is main file source before include file, enter it. */
665 if (offset
< inclTable
[ii
].begin
)
668 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
669 start
, 0, &main_source_baseline
);
672 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
674 /* The entry in the include table refers to the main source
675 file. Add the lines to the main subfile. */
677 main_source_baseline
= inclTable
[ii
].funStartLine
;
679 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
680 start
, 0, &main_source_baseline
);
681 inclTable
[ii
].subfile
= &main_subfile
;
685 /* Have a new subfile for the include file. */
687 tmpSubfile
= inclTable
[ii
].subfile
=
688 (struct subfile
*) xmalloc (sizeof (struct subfile
));
690 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
691 firstLine
= &(inclTable
[ii
].funStartLine
);
693 /* Enter include file's lines now. */
694 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
695 inclTable
[ii
].end
, start
, 0, firstLine
);
698 if (offset
<= inclTable
[ii
].end
)
699 offset
= inclTable
[ii
].end
+ linesz
;
702 /* All the include files' line have been processed at this point. Now,
703 enter remaining lines of the main file, if any left. */
704 if (offset
< max_offset
+ 1 - linesz
)
706 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
707 &main_source_baseline
);
711 /* Process main file's line numbers. */
712 if (main_subfile
.line_vector
)
714 struct linetable
*lineTb
, *lv
;
716 lv
= main_subfile
.line_vector
;
718 /* Line numbers are not necessarily ordered. xlc compilation will
719 put static function to the end. */
721 lineTb
= arrange_linetable (lv
);
724 current_subfile
->line_vector
= (struct linetable
*)
725 xrealloc (lv
, (sizeof (struct linetable
)
726 + lv
->nitems
* sizeof (struct linetable_entry
)));
731 current_subfile
->line_vector
= lineTb
;
734 current_subfile
->line_vector_length
=
735 current_subfile
->line_vector
->nitems
;
738 /* Now, process included files' line numbers. */
740 for (ii
= 0; ii
< inclIndx
; ++ii
)
742 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
743 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
746 struct linetable
*lineTb
, *lv
;
748 lv
= (inclTable
[ii
].subfile
)->line_vector
;
750 /* Line numbers are not necessarily ordered. xlc compilation will
751 put static function to the end. */
753 lineTb
= arrange_linetable (lv
);
757 /* For the same include file, we might want to have more than one
758 subfile. This happens if we have something like:
766 while foo.h including code in it. (stupid but possible)
767 Since start_subfile() looks at the name and uses an
768 existing one if finds, we need to provide a fake name and
772 start_subfile (inclTable
[ii
].name
, (char *) 0);
775 /* Pick a fake name that will produce the same results as this
776 one when passed to deduce_language_from_filename. Kludge on
778 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
780 if (fakename
== NULL
)
782 start_subfile (fakename
, (char *) 0);
783 xfree (current_subfile
->name
);
785 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
790 current_subfile
->line_vector
=
791 (struct linetable
*) xrealloc
792 (lv
, (sizeof (struct linetable
)
793 + lv
->nitems
* sizeof (struct linetable_entry
)));
799 current_subfile
->line_vector
= lineTb
;
802 current_subfile
->line_vector_length
=
803 current_subfile
->line_vector
->nitems
;
804 start_subfile (pop_subfile (), (char *) 0);
808 return_after_cleanup
:
810 /* We don't want to keep alloc/free'ing the global include file table. */
813 /* Start with a fresh subfile structure for the next file. */
814 memset (&main_subfile
, '\0', sizeof (struct subfile
));
818 aix_process_linenos (struct objfile
*objfile
)
820 /* There is no linenos to read if there are only dwarf info. */
821 if (this_symtab_psymtab
== NULL
)
824 /* Process line numbers and enter them into line vector. */
825 process_linenos (last_source_start_addr
, cur_src_end_addr
);
829 /* Enter a given range of lines into the line vector.
830 can be called in the following two ways:
831 enter_line_range (subfile, beginoffset, endoffset,
832 startaddr, 0, firstLine) or
833 enter_line_range (subfile, beginoffset, 0,
834 startaddr, endaddr, firstLine)
836 endoffset points to the last line table entry that we should pay
840 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
841 unsigned endoffset
, /* offsets to line table */
842 CORE_ADDR startaddr
, /* offsets to line table */
843 CORE_ADDR endaddr
, unsigned *firstLine
)
845 struct objfile
*objfile
= this_symtab_objfile
;
846 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
847 unsigned int curoffset
;
850 struct internal_lineno int_lnno
;
851 unsigned int limit_offset
;
855 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
857 curoffset
= beginoffset
;
858 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
862 if (endoffset
>= limit_offset
)
864 complaint (&symfile_complaints
,
865 _("Bad line table offset in C_EINCL directive"));
868 limit_offset
= endoffset
;
873 abfd
= objfile
->obfd
;
874 linesz
= coff_data (abfd
)->local_linesz
;
875 ext_lnno
= alloca (linesz
);
877 while (curoffset
<= limit_offset
)
879 bfd_seek (abfd
, curoffset
, SEEK_SET
);
880 bfd_bread (ext_lnno
, linesz
, abfd
);
881 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
883 /* Find the address this line represents. */
884 addr
= (int_lnno
.l_lnno
885 ? int_lnno
.l_addr
.l_paddr
886 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
887 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
889 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
892 if (int_lnno
.l_lnno
== 0)
894 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
895 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
899 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
900 gdbarch_addr_bits_remove (gdbarch
, addr
));
906 /* Save the vital information for use when closing off the current file.
907 NAME is the file name the symbols came from, START_ADDR is the first
908 text address for the file, and SIZE is the number of bytes of text. */
910 #define complete_symtab(name, start_addr) { \
911 set_last_source_file (name); \
912 last_source_start_addr = start_addr; \
916 /* Refill the symbol table input buffer
917 and set the variables that control fetching entries from it.
918 Reports an error if no data available.
919 This function can read past the end of the symbol table
920 (into the string table) but this does no harm. */
922 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
924 Creation of all new minimal symbols should go through this function
925 rather than calling the various prim_record_[...] functions in order
926 to make sure that all symbol addresses get properly relocated.
930 NAME - the symbol's name (but if NAME starts with a period, that
931 leading period is discarded).
932 ADDRESS - the symbol's address, prior to relocation. This function
933 relocates the address before recording the minimal symbol.
934 MS_TYPE - the symbol's type.
935 N_SCNUM - the symbol's XCOFF section number.
936 OBJFILE - the objfile associated with the minimal symbol. */
939 record_minimal_symbol (const char *name
, CORE_ADDR address
,
940 enum minimal_symbol_type ms_type
,
942 struct objfile
*objfile
)
944 int section
= secnum_to_section (n_scnum
, objfile
);
949 prim_record_minimal_symbol_and_info (name
, address
, ms_type
,
950 secnum_to_section (n_scnum
, objfile
),
954 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
955 nested. At any given time, a symbol can only be in one static block.
956 This is the base address of current static block, zero if non exists. */
958 static int static_block_base
= 0;
960 /* Section number for the current static block. */
962 static int static_block_section
= -1;
964 /* true if space for symbol name has been allocated. */
966 static int symname_alloced
= 0;
968 /* Next symbol to read. Pointer into raw seething symbol table. */
970 static char *raw_symbol
;
972 /* This is the function which stabsread.c calls to get symbol
976 xcoff_next_symbol_text (struct objfile
*objfile
)
978 struct internal_syment symbol
;
981 /* FIXME: is this the same as the passed arg? */
982 if (this_symtab_objfile
)
983 objfile
= this_symtab_objfile
;
985 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
988 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
990 /* Return something which points to '\0' and hope the symbol reading
991 code does something reasonable. */
994 else if (symbol
.n_sclass
& 0x80)
996 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
997 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
1002 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
1004 /* Return something which points to '\0' and hope the symbol reading
1005 code does something reasonable. */
1011 /* Read symbols for a given partial symbol table. */
1014 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1016 bfd
*abfd
= objfile
->obfd
;
1017 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1018 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1019 char *strtbl
= xcoff
->strtbl
;
1020 char *debugsec
= xcoff
->debugsec
;
1021 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1023 struct internal_syment symbol
[1];
1024 union internal_auxent main_aux
;
1025 struct coff_symbol cs
[1];
1026 CORE_ADDR file_start_addr
= 0;
1027 CORE_ADDR file_end_addr
= 0;
1029 int next_file_symnum
= -1;
1030 unsigned int max_symnum
;
1031 int just_started
= 1;
1033 CORE_ADDR fcn_start_addr
= 0;
1035 struct coff_symbol fcn_stab_saved
= { 0 };
1037 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1038 union internal_auxent fcn_aux_saved
= main_aux
;
1039 struct context_stack
*new;
1041 char *filestring
= " _start_ "; /* Name of the current file. */
1043 const char *last_csect_name
; /* Last seen csect's name. */
1045 this_symtab_psymtab
= pst
;
1046 this_symtab_objfile
= objfile
;
1048 /* Get the appropriate COFF "constants" related to the file we're
1050 local_symesz
= coff_data (abfd
)->local_symesz
;
1052 set_last_source_file (NULL
);
1053 last_csect_name
= 0;
1056 start_symtab (filestring
, (char *) NULL
, file_start_addr
);
1057 record_debugformat (debugfmt
);
1058 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1060 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1061 first_object_file_end
= 0;
1063 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1065 while (symnum
< max_symnum
)
1067 QUIT
; /* make this command interruptable. */
1069 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1070 /* read one symbol into `cs' structure. After processing the
1071 whole symbol table, only string table will be kept in memory,
1072 symbol table and debug section of xcoff will be freed. Thus
1073 we can mark symbols with names in string table as
1078 /* Swap and align the symbol into a reasonable C structure. */
1079 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1081 cs
->c_symnum
= symnum
;
1082 cs
->c_naux
= symbol
->n_numaux
;
1083 if (symbol
->n_zeroes
)
1085 symname_alloced
= 0;
1086 /* We must use the original, unswapped, name here so the name field
1087 pointed to by cs->c_name will persist throughout xcoffread. If
1088 we use the new field, it gets overwritten for each symbol. */
1089 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1090 /* If it's exactly E_SYMNMLEN characters long it isn't
1092 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1096 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
1097 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1098 p
[E_SYMNMLEN
] = '\0';
1100 symname_alloced
= 1;
1103 else if (symbol
->n_sclass
& 0x80)
1105 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1106 symname_alloced
= 0;
1110 /* in string table */
1111 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1112 symname_alloced
= 1;
1114 cs
->c_value
= symbol
->n_value
;
1115 cs
->c_sclass
= symbol
->n_sclass
;
1116 cs
->c_secnum
= symbol
->n_scnum
;
1117 cs
->c_type
= (unsigned) symbol
->n_type
;
1119 raw_symbol
+= local_symesz
;
1122 /* Save addr of first aux entry. */
1123 raw_auxptr
= raw_symbol
;
1125 /* Skip all the auxents associated with this symbol. */
1126 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1128 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1133 /* if symbol name starts with ".$" or "$", ignore it. */
1134 if (cs
->c_name
[0] == '$'
1135 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1138 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1140 if (get_last_source_file ())
1142 pst
->symtab
= end_symtab (cur_src_end_addr
, objfile
,
1143 SECT_OFF_TEXT (objfile
));
1148 start_symtab ("_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1149 record_debugformat (debugfmt
);
1150 cur_src_end_addr
= first_object_file_end
;
1151 /* Done with all files, everything from here on is globals. */
1154 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1157 /* Dealing with a symbol with a csect entry. */
1159 #define CSECT(PP) ((PP)->x_csect)
1160 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1161 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1162 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1163 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1165 /* Convert the auxent to something we can access. */
1166 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1167 0, cs
->c_naux
, &main_aux
);
1169 switch (CSECT_SMTYP (&main_aux
))
1173 /* Ignore all external references. */
1177 /* A section description. */
1179 switch (CSECT_SCLAS (&main_aux
))
1185 /* A program csect is seen. We have to allocate one
1186 symbol table for each program csect. Normally gdb
1187 prefers one symtab for each source file. In case
1188 of AIX, one source file might include more than one
1189 [PR] csect, and they don't have to be adjacent in
1190 terms of the space they occupy in memory. Thus, one
1191 single source file might get fragmented in the
1192 memory and gdb's file start and end address
1193 approach does not work! GCC (and I think xlc) seem
1194 to put all the code in the unnamed program csect. */
1196 if (last_csect_name
)
1198 complete_symtab (filestring
, file_start_addr
);
1199 cur_src_end_addr
= file_end_addr
;
1200 end_symtab (file_end_addr
, objfile
,
1201 SECT_OFF_TEXT (objfile
));
1204 /* Give all csects for this source file the same
1206 start_symtab (filestring
, NULL
, (CORE_ADDR
) 0);
1207 record_debugformat (debugfmt
);
1210 /* If this is the very first csect seen,
1211 basically `__start'. */
1214 first_object_file_end
1215 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1220 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1221 SECT_OFF_TEXT (objfile
));
1222 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1224 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1225 last_csect_name
= cs
->c_name
;
1229 /* All other symbols are put into the minimal symbol
1242 /* Ignore the symbol. */
1250 switch (CSECT_SCLAS (&main_aux
))
1253 /* a function entry point. */
1254 function_entry_point
:
1256 fcn_start_addr
= cs
->c_value
;
1258 /* save the function header info, which will be used
1259 when `.bf' is seen. */
1261 fcn_aux_saved
= main_aux
;
1265 /* shared library function trampoline code entry point. */
1269 /* The symbols often have the same names as debug symbols for
1270 functions, and confuse lookup_symbol. */
1274 /* xlc puts each variable in a separate csect, so we get
1275 an XTY_SD for each variable. But gcc puts several
1276 variables in a csect, so that each variable only gets
1277 an XTY_LD. This will typically be XMC_RW; I suspect
1278 XMC_RO and XMC_BS might be possible too.
1279 These variables are put in the minimal symbol table
1286 /* Common symbols are put into the minimal symbol table only. */
1294 /* If explicitly specified as a function, treat is as one. This check
1295 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1296 after the above CSECT check. */
1297 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1299 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1300 0, cs
->c_naux
, &main_aux
);
1301 goto function_entry_point
;
1304 switch (cs
->c_sclass
)
1308 /* c_value field contains symnum of next .file entry in table
1309 or symnum of first global after last .file. */
1311 next_file_symnum
= cs
->c_value
;
1313 /* Complete symbol table for last object file containing
1314 debugging information. */
1316 /* Whether or not there was a csect in the previous file, we
1317 have to call `end_stabs' and `start_stabs' to reset
1318 type_vector, line_vector, etc. structures. */
1320 complete_symtab (filestring
, file_start_addr
);
1321 cur_src_end_addr
= file_end_addr
;
1322 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1325 /* XCOFF, according to the AIX 3.2 documentation, puts the
1326 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1327 do things the standard COFF way and put it in the auxent.
1328 We use the auxent if the symbol is ".file" and an auxent
1329 exists, otherwise use the symbol itself. Simple
1331 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1333 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1334 0, cs
->c_naux
, &main_aux
);
1335 filestring
= coff_getfilename (&main_aux
, objfile
);
1338 filestring
= cs
->c_name
;
1341 start_symtab (filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1342 record_debugformat (debugfmt
);
1343 last_csect_name
= 0;
1345 /* reset file start and end addresses. A compilation unit
1346 with no text (only data) should have zero file
1348 file_start_addr
= file_end_addr
= 0;
1352 fcn_stab_saved
= *cs
;
1356 if (strcmp (cs
->c_name
, ".bf") == 0)
1358 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1359 SECT_OFF_TEXT (objfile
));
1361 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1362 0, cs
->c_naux
, &main_aux
);
1364 within_function
= 1;
1366 new = push_context (0, fcn_start_addr
+ off
);
1368 new->name
= define_symbol
1369 (fcn_cs_saved
.c_value
+ off
,
1370 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1371 if (new->name
!= NULL
)
1372 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT (objfile
);
1374 else if (strcmp (cs
->c_name
, ".ef") == 0)
1376 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1377 0, cs
->c_naux
, &main_aux
);
1379 /* The value of .ef is the address of epilogue code;
1380 not useful for gdb. */
1381 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1382 contains number of lines to '}' */
1384 if (context_stack_depth
<= 0)
1385 { /* We attempted to pop an empty context stack. */
1386 ef_complaint (cs
->c_symnum
);
1387 within_function
= 0;
1390 new = pop_context ();
1391 /* Stack must be empty now. */
1392 if (context_stack_depth
> 0 || new == NULL
)
1394 ef_complaint (cs
->c_symnum
);
1395 within_function
= 0;
1399 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1401 (fcn_cs_saved
.c_value
1402 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1403 + ANOFFSET (objfile
->section_offsets
,
1404 SECT_OFF_TEXT (objfile
))),
1406 within_function
= 0;
1411 /* Begin static block. */
1413 struct internal_syment symbol
;
1415 read_symbol (&symbol
, cs
->c_value
);
1416 static_block_base
= symbol
.n_value
;
1417 static_block_section
=
1418 secnum_to_section (symbol
.n_scnum
, objfile
);
1423 /* End of static block. */
1424 static_block_base
= 0;
1425 static_block_section
= -1;
1436 complaint (&symfile_complaints
,
1437 _("Unrecognized storage class %d."),
1452 /* beginning of include file */
1453 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1454 order. Thus, when wee see them, we might not know enough info
1455 to process them. Thus, we'll be saving them into a table
1456 (inclTable) and postpone their processing. */
1458 record_include_begin (cs
);
1462 /* End of include file. */
1463 /* See the comment after case C_BINCL. */
1464 record_include_end (cs
);
1468 if (strcmp (cs
->c_name
, ".bb") == 0)
1471 new = push_context (depth
,
1473 + ANOFFSET (objfile
->section_offsets
,
1474 SECT_OFF_TEXT (objfile
))));
1476 else if (strcmp (cs
->c_name
, ".eb") == 0)
1478 if (context_stack_depth
<= 0)
1479 { /* We attempted to pop an empty context stack. */
1480 eb_complaint (cs
->c_symnum
);
1483 new = pop_context ();
1484 if (depth
-- != new->depth
)
1486 eb_complaint (cs
->c_symnum
);
1489 if (local_symbols
&& context_stack_depth
> 0)
1491 /* Make a block for the local symbols within. */
1492 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1495 + ANOFFSET (objfile
->section_offsets
,
1496 SECT_OFF_TEXT (objfile
))),
1499 local_symbols
= new->locals
;
1504 process_xcoff_symbol (cs
, objfile
);
1509 if (get_last_source_file ())
1513 complete_symtab (filestring
, file_start_addr
);
1514 cur_src_end_addr
= file_end_addr
;
1515 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1516 /* When reading symbols for the last C_FILE of the objfile, try
1517 to make sure that we set pst->symtab to the symtab for the
1518 file, not to the _globals_ symtab. I'm not sure whether this
1519 actually works right or when/if it comes up. */
1520 if (pst
->symtab
== NULL
)
1526 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1527 (SYMBOL2) = (struct symbol *) \
1528 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1529 *(SYMBOL2) = *(SYMBOL1);
1532 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1533 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1534 (NAME), strlen (NAME)))
1537 /* process one xcoff symbol. */
1539 static struct symbol
*
1540 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1542 struct symbol onesymbol
;
1543 struct symbol
*sym
= &onesymbol
;
1544 struct symbol
*sym2
= NULL
;
1550 if (cs
->c_secnum
< 0)
1552 /* The value is a register number, offset within a frame, etc.,
1553 and does not get relocated. */
1559 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1560 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1567 initialize_symbol (sym
);
1569 /* default assumptions */
1570 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1571 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1572 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1574 if (ISFCN (cs
->c_type
))
1576 /* At this point, we don't know the type of the function. This
1577 will be patched with the type from its stab entry later on in
1578 patch_block_stabs (), unless the file was compiled without -g. */
1580 SYMBOL_SET_LINKAGE_NAME (sym
, SYMNAME_ALLOC (name
, symname_alloced
));
1581 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1583 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1584 SYMBOL_DUP (sym
, sym2
);
1586 if (cs
->c_sclass
== C_EXT
)
1587 add_symbol_to_list (sym2
, &global_symbols
);
1588 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1589 add_symbol_to_list (sym2
, &file_symbols
);
1593 /* In case we can't figure out the type, provide default. */
1594 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1596 switch (cs
->c_sclass
)
1599 /* The values of functions and global symbols are now resolved
1600 via the global_sym_chain in stabsread.c. */
1602 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1603 add_stab_to_list (name
, &global_stabs
);
1605 add_stab_to_list (name
, &file_stabs
);
1609 add_stab_to_list (name
, &global_stabs
);
1614 common_block_start (cs
->c_name
, objfile
);
1618 common_block_end (objfile
);
1622 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1635 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1638 SYMBOL_SECTION (sym
) = sec
;
1645 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1646 all statics and we need to distinguish file-scope versus
1647 function-scope using within_function. We do this by
1648 changing the string we pass to define_symbol to use 'S'
1649 where we need to, which is not necessarily super-clean,
1650 but seems workable enough. */
1655 pp
= strchr (name
, ':');
1660 if (*pp
== 'V' && !within_function
)
1662 sym
= define_symbol ((cs
->c_value
1663 + ANOFFSET (objfile
->section_offsets
,
1664 static_block_section
)),
1665 cs
->c_name
, 0, 0, objfile
);
1668 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1669 SYMBOL_SECTION (sym
) = static_block_section
;
1678 /* Extract the file name from the aux entry of a C_FILE symbol.
1679 Result is in static storage and is only good for temporary use. */
1682 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1684 static char buffer
[BUFSIZ
];
1686 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1687 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1688 + aux_entry
->x_file
.x_n
.x_offset
));
1691 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1692 buffer
[FILNMLEN
] = '\0';
1697 /* Set *SYMBOL to symbol number symno in symtbl. */
1699 read_symbol (struct internal_syment
*symbol
, int symno
)
1701 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1702 int nsyms
= xcoff
->symtbl_num_syms
;
1703 char *stbl
= xcoff
->symtbl
;
1705 if (symno
< 0 || symno
>= nsyms
)
1707 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1708 symbol
->n_value
= 0;
1709 symbol
->n_scnum
= -1;
1712 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1713 stbl
+ (symno
* local_symesz
),
1717 /* Get value corresponding to symbol number symno in symtbl. */
1720 read_symbol_nvalue (int symno
)
1722 struct internal_syment symbol
[1];
1724 read_symbol (symbol
, symno
);
1725 return symbol
->n_value
;
1729 /* Find the address of the function corresponding to symno, where
1730 symno is the symbol pointed to by the linetable. */
1733 read_symbol_lineno (int symno
)
1735 struct objfile
*objfile
= this_symtab_objfile
;
1736 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1738 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1739 int nsyms
= info
->symtbl_num_syms
;
1740 char *stbl
= info
->symtbl
;
1741 char *strtbl
= info
->strtbl
;
1743 struct internal_syment symbol
[1];
1744 union internal_auxent main_aux
[1];
1748 bf_notfound_complaint ();
1752 /* Note that just searching for a short distance (e.g. 50 symbols)
1753 is not enough, at least in the following case.
1756 [many .stabx entries]
1757 [a few functions, referring to foo]
1761 What happens here is that the assembler moves the .stabx entries
1762 to right before the ".bf" for foo, but the symbol for "foo" is before
1763 all the stabx entries. See PR gdb/2222. */
1765 /* Maintaining a table of .bf entries might be preferable to this search.
1766 If I understand things correctly it would need to be done only for
1767 the duration of a single psymtab to symtab conversion. */
1768 while (symno
< nsyms
)
1770 bfd_coff_swap_sym_in (symfile_bfd
,
1771 stbl
+ (symno
* local_symesz
), symbol
);
1772 if (symbol
->n_sclass
== C_FCN
)
1774 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1776 if (strcmp (name
, ".bf") == 0)
1779 symno
+= symbol
->n_numaux
+ 1;
1782 bf_notfound_complaint ();
1786 /* Take aux entry and return its lineno. */
1788 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1789 symbol
->n_type
, symbol
->n_sclass
,
1790 0, symbol
->n_numaux
, main_aux
);
1792 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1795 /* Support for line number handling. */
1797 /* This function is called for every section; it finds the outer limits
1798 * of the line table (minimum and maximum file offset) so that the
1799 * mainline code can read the whole thing for efficiency.
1802 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1804 struct coff_symfile_info
*info
;
1806 file_ptr offset
, maxoff
;
1808 count
= asect
->lineno_count
;
1810 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1813 size
= count
* coff_data (abfd
)->local_linesz
;
1814 info
= (struct coff_symfile_info
*) vpinfo
;
1815 offset
= asect
->line_filepos
;
1816 maxoff
= offset
+ size
;
1818 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1819 info
->min_lineno_offset
= offset
;
1821 if (maxoff
> info
->max_lineno_offset
)
1822 info
->max_lineno_offset
= maxoff
;
1826 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1828 struct cleanup
*old_chain
;
1837 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1842 /* Read in all partial symtabs on which this one is dependent. */
1843 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1844 if (!pst
->dependencies
[i
]->readin
)
1846 /* Inform about additional files that need to be read in. */
1849 fputs_filtered (" ", gdb_stdout
);
1851 fputs_filtered ("and ", gdb_stdout
);
1853 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1854 wrap_here (""); /* Flush output */
1855 gdb_flush (gdb_stdout
);
1857 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1860 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1862 /* Init stuff necessary for reading in symbols. */
1865 old_chain
= make_cleanup (really_free_pendings
, 0);
1867 read_xcoff_symtab (objfile
, pst
);
1869 do_cleanups (old_chain
);
1875 /* Read in all of the symbols for a given psymtab for real.
1876 Be verbose about it if the user wants that. SELF is not NULL. */
1879 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1884 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1889 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1890 || self
->number_of_dependencies
)
1892 /* Print the message now, before reading the string table,
1893 to avoid disconcerting pauses. */
1896 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1897 gdb_flush (gdb_stdout
);
1900 next_symbol_text_func
= xcoff_next_symbol_text
;
1902 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1904 /* Match with global symbols. This only needs to be done once,
1905 after all of the symtabs and dependencies have been read in. */
1906 scan_file_globals (objfile
);
1908 /* Finish up the debug error message. */
1910 printf_filtered ("done.\n");
1915 xcoff_new_init (struct objfile
*objfile
)
1917 stabsread_new_init ();
1918 buildsym_new_init ();
1921 /* Do initialization in preparation for reading symbols from OBJFILE.
1923 We will only be called if this is an XCOFF or XCOFF-like file.
1924 BFD handles figuring out the format of the file, and code in symfile.c
1925 uses BFD's determination to vector to us. */
1928 xcoff_symfile_init (struct objfile
*objfile
)
1930 struct coff_symfile_info
*xcoff
;
1932 /* Allocate struct to keep track of the symfile. */
1933 xcoff
= XNEW (struct coff_symfile_info
);
1934 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1936 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1937 find this causes a significant slowdown in gdb then we could
1938 set it in the debug symbol readers only when necessary. */
1939 objfile
->flags
|= OBJF_REORDERED
;
1942 /* Perform any local cleanups required when we are done with a particular
1943 objfile. I.E, we are in the process of discarding all symbol information
1944 for an objfile, freeing up all memory held for it, and unlinking the
1945 objfile struct from the global list of known objfiles. */
1948 xcoff_symfile_finish (struct objfile
*objfile
)
1950 /* Start with a fresh include table for the next objfile. */
1956 inclIndx
= inclLength
= inclDepth
= 0;
1958 dwarf2_free_objfile (objfile
);
1963 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1967 unsigned char lengthbuf
[4];
1969 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1971 xcoff
->strtbl
= NULL
;
1973 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1974 error (_("cannot seek to string table in %s: %s"),
1975 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1977 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1978 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1980 /* If no string table is needed, then the file may end immediately
1981 after the symbols. Just return with `strtbl' set to NULL. */
1983 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1986 /* Allocate string table from objfile_obstack. We will need this table
1987 as long as we have its symbol table around. */
1989 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1990 xcoff
->strtbl
= strtbl
;
1992 /* Copy length buffer, the first byte is usually zero and is
1993 used for stabs with a name length of zero. */
1994 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1995 if (length
== sizeof lengthbuf
)
1998 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
2000 if (val
!= length
- sizeof lengthbuf
)
2001 error (_("cannot read string table from %s: %s"),
2002 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
2003 if (strtbl
[length
- 1] != '\0')
2004 error (_("bad symbol file: string table "
2005 "does not end with null character"));
2010 /* If we have not yet seen a function for this psymtab, this is 0. If we
2011 have seen one, it is the offset in the line numbers of the line numbers
2013 static unsigned int first_fun_line_offset
;
2015 /* Allocate and partially fill a partial symtab. It will be
2016 completely filled at the end of the symbol list.
2018 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2019 is the address relative to which its symbols are (incremental) or 0
2022 static struct partial_symtab
*
2023 xcoff_start_psymtab (struct objfile
*objfile
,
2024 const char *filename
, int first_symnum
,
2025 struct partial_symbol
**global_syms
,
2026 struct partial_symbol
**static_syms
)
2028 struct partial_symtab
*result
=
2029 start_psymtab_common (objfile
, objfile
->section_offsets
,
2031 /* We fill in textlow later. */
2033 global_syms
, static_syms
);
2035 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2036 sizeof (struct symloc
));
2037 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2038 result
->read_symtab
= xcoff_read_symtab
;
2040 /* Deduce the source language from the filename for this psymtab. */
2041 psymtab_language
= deduce_language_from_filename (filename
);
2046 /* Close off the current usage of PST.
2047 Returns PST, or NULL if the partial symtab was empty and thrown away.
2049 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2051 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2052 are the information for includes and dependencies. */
2054 static struct partial_symtab
*
2055 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2056 const char **include_list
, int num_includes
,
2057 int capping_symbol_number
,
2058 struct partial_symtab
**dependency_list
,
2059 int number_dependencies
, int textlow_not_set
)
2063 if (capping_symbol_number
!= -1)
2064 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2065 capping_symbol_number
2066 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2067 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2068 first_fun_line_offset
;
2069 first_fun_line_offset
= 0;
2070 pst
->n_global_syms
= objfile
->global_psymbols
.next
2071 - (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2072 pst
->n_static_syms
= objfile
->static_psymbols
.next
2073 - (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2075 pst
->number_of_dependencies
= number_dependencies
;
2076 if (number_dependencies
)
2078 pst
->dependencies
= (struct partial_symtab
**)
2079 obstack_alloc (&objfile
->objfile_obstack
,
2080 number_dependencies
* sizeof (struct partial_symtab
*));
2081 memcpy (pst
->dependencies
, dependency_list
,
2082 number_dependencies
* sizeof (struct partial_symtab
*));
2085 pst
->dependencies
= 0;
2087 for (i
= 0; i
< num_includes
; i
++)
2089 struct partial_symtab
*subpst
=
2090 allocate_psymtab (include_list
[i
], objfile
);
2092 subpst
->section_offsets
= pst
->section_offsets
;
2093 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2094 sizeof (struct symloc
));
2095 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2096 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2097 subpst
->textlow
= 0;
2098 subpst
->texthigh
= 0;
2100 /* We could save slight bits of space by only making one of these,
2101 shared by the entire set of include files. FIXME-someday. */
2102 subpst
->dependencies
= (struct partial_symtab
**)
2103 obstack_alloc (&objfile
->objfile_obstack
,
2104 sizeof (struct partial_symtab
*));
2105 subpst
->dependencies
[0] = pst
;
2106 subpst
->number_of_dependencies
= 1;
2108 subpst
->globals_offset
=
2109 subpst
->n_global_syms
=
2110 subpst
->statics_offset
=
2111 subpst
->n_static_syms
= 0;
2115 subpst
->read_symtab
= pst
->read_symtab
;
2118 sort_pst_symbols (objfile
, pst
);
2120 if (num_includes
== 0
2121 && number_dependencies
== 0
2122 && pst
->n_global_syms
== 0
2123 && pst
->n_static_syms
== 0)
2125 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2126 it is on the obstack, but we can forget to chain it on the list. */
2127 /* Empty psymtabs happen as a result of header files which don't have
2128 any symbols in them. There can be a lot of them. */
2130 discard_psymtab (objfile
, pst
);
2132 /* Indicate that psymtab was thrown away. */
2133 pst
= (struct partial_symtab
*) NULL
;
2138 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2139 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2140 the symbol and its auxents. */
2143 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2144 const char **name
, char **raw
, unsigned int *symnump
,
2145 struct objfile
*objfile
)
2147 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2148 if (symbol
->n_zeroes
)
2150 /* If it's exactly E_SYMNMLEN characters long it isn't
2152 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2154 /* FIXME: wastes memory for symbols which we don't end up putting
2155 into the minimal symbols. */
2158 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
2159 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2160 p
[E_SYMNMLEN
] = '\0';
2164 /* Point to the unswapped name as that persists as long as the
2166 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2168 else if (symbol
->n_sclass
& 0x80)
2170 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2174 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2177 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2178 if (symbol
->n_numaux
> 0)
2180 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2181 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2183 *symnump
+= symbol
->n_numaux
;
2184 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2189 function_outside_compilation_unit_complaint (const char *arg1
)
2191 complaint (&symfile_complaints
,
2192 _("function `%s' appears to be defined "
2193 "outside of all compilation units"),
2198 scan_xcoff_symtab (struct objfile
*objfile
)
2200 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2201 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2202 const char *filestring
= NULL
;
2204 const char *namestring
;
2205 int past_first_source_file
= 0;
2210 /* Current partial symtab */
2211 struct partial_symtab
*pst
;
2213 /* List of current psymtab's include files. */
2214 const char **psymtab_include_list
;
2215 int includes_allocated
;
2218 /* Index within current psymtab dependency list. */
2219 struct partial_symtab
**dependency_list
;
2220 int dependencies_used
, dependencies_allocated
;
2223 struct internal_syment symbol
;
2224 union internal_auxent main_aux
[5];
2225 unsigned int ssymnum
;
2227 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2228 CORE_ADDR last_csect_val
= 0;
2229 int last_csect_sec
= 0;
2230 int misc_func_recorded
= 0; /* true if any misc. function. */
2231 int textlow_not_set
= 1;
2233 pst
= (struct partial_symtab
*) 0;
2235 includes_allocated
= 30;
2237 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2238 sizeof (const char *));
2240 dependencies_allocated
= 30;
2241 dependencies_used
= 0;
2243 (struct partial_symtab
**) alloca (dependencies_allocated
*
2244 sizeof (struct partial_symtab
*));
2246 set_last_source_file (NULL
);
2248 abfd
= objfile
->obfd
;
2249 next_symbol_text_func
= xcoff_next_symbol_text
;
2251 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2252 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2254 while (ssymnum
< nsyms
)
2260 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2261 sclass
= symbol
.n_sclass
;
2268 /* The CSECT auxent--always the last auxent. */
2269 union internal_auxent csect_aux
;
2270 unsigned int symnum_before
= ssymnum
;
2272 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2274 if (symbol
.n_numaux
> 1)
2276 bfd_coff_swap_aux_in
2278 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2281 symbol
.n_numaux
- 1,
2286 csect_aux
= main_aux
[0];
2288 /* If symbol name starts with ".$" or "$", ignore it. */
2289 if (namestring
[0] == '$'
2290 || (namestring
[0] == '.' && namestring
[1] == '$'))
2293 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2296 switch (csect_aux
.x_csect
.x_smclas
)
2299 if (last_csect_name
)
2301 /* If no misc. function recorded in the last
2302 seen csect, enter it as a function. This
2303 will take care of functions like strcmp()
2306 if (!misc_func_recorded
)
2308 record_minimal_symbol
2309 (last_csect_name
, last_csect_val
,
2310 mst_text
, last_csect_sec
, objfile
);
2311 misc_func_recorded
= 1;
2316 /* We have to allocate one psymtab for
2317 each program csect, because their text
2318 sections need not be adjacent. */
2320 (objfile
, pst
, psymtab_include_list
,
2321 includes_used
, symnum_before
, dependency_list
,
2322 dependencies_used
, textlow_not_set
);
2324 dependencies_used
= 0;
2325 /* Give all psymtabs for this source file the same
2327 pst
= xcoff_start_psymtab
2331 objfile
->global_psymbols
.next
,
2332 objfile
->static_psymbols
.next
);
2335 /* Activate the misc_func_recorded mechanism for
2336 compiler- and linker-generated CSECTs like ".strcmp"
2338 if (namestring
&& (namestring
[0] == '.'
2339 || namestring
[0] == '@'))
2341 last_csect_name
= namestring
;
2342 last_csect_val
= symbol
.n_value
;
2343 last_csect_sec
= symbol
.n_scnum
;
2348 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2350 if (highval
> pst
->texthigh
)
2351 pst
->texthigh
= highval
;
2352 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2353 pst
->textlow
= symbol
.n_value
;
2355 misc_func_recorded
= 0;
2360 /* Data variables are recorded in the minimal symbol
2361 table, except for section symbols. */
2362 if (*namestring
!= '.')
2363 record_minimal_symbol
2364 (namestring
, symbol
.n_value
,
2365 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2366 symbol
.n_scnum
, objfile
);
2371 warning (_("More than one XMC_TC0 symbol found."));
2372 toc_offset
= symbol
.n_value
;
2374 /* Make TOC offset relative to start address of
2376 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2378 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2382 /* These symbols tell us where the TOC entry for a
2383 variable is, not the variable itself. */
2392 switch (csect_aux
.x_csect
.x_smclas
)
2395 /* A function entry point. */
2397 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2398 first_fun_line_offset
=
2399 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2401 record_minimal_symbol
2402 (namestring
, symbol
.n_value
,
2403 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2404 symbol
.n_scnum
, objfile
);
2405 misc_func_recorded
= 1;
2410 /* shared library function trampoline code entry
2413 /* record trampoline code entries as
2414 mst_solib_trampoline symbol. When we lookup mst
2415 symbols, we will choose mst_text over
2416 mst_solib_trampoline. */
2417 record_minimal_symbol
2418 (namestring
, symbol
.n_value
,
2419 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2420 misc_func_recorded
= 1;
2424 /* The symbols often have the same names as
2425 debug symbols for functions, and confuse
2431 /* xlc puts each variable in a separate csect,
2432 so we get an XTY_SD for each variable. But
2433 gcc puts several variables in a csect, so
2434 that each variable only gets an XTY_LD. We
2435 still need to record them. This will
2436 typically be XMC_RW; I suspect XMC_RO and
2437 XMC_BS might be possible too. */
2438 if (*namestring
!= '.')
2439 record_minimal_symbol
2440 (namestring
, symbol
.n_value
,
2441 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2442 symbol
.n_scnum
, objfile
);
2448 switch (csect_aux
.x_csect
.x_smclas
)
2452 /* Common variables are recorded in the minimal symbol
2453 table, except for section symbols. */
2454 if (*namestring
!= '.')
2455 record_minimal_symbol
2456 (namestring
, symbol
.n_value
,
2457 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2458 symbol
.n_scnum
, objfile
);
2470 unsigned int symnum_before
;
2472 symnum_before
= ssymnum
;
2473 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2476 /* See if the last csect needs to be recorded. */
2478 if (last_csect_name
&& !misc_func_recorded
)
2480 /* If no misc. function recorded in the last seen csect, enter
2481 it as a function. This will take care of functions like
2482 strcmp() compiled by xlc. */
2484 record_minimal_symbol (last_csect_name
, last_csect_val
,
2485 mst_text
, last_csect_sec
, objfile
);
2486 misc_func_recorded
= 1;
2491 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2492 includes_used
, symnum_before
,
2493 dependency_list
, dependencies_used
,
2496 dependencies_used
= 0;
2498 first_fun_line_offset
= 0;
2500 /* XCOFF, according to the AIX 3.2 documentation, puts the
2501 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2502 do things the standard COFF way and put it in the auxent.
2503 We use the auxent if the symbol is ".file" and an auxent
2504 exists, otherwise use the symbol itself. */
2505 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2507 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2510 filestring
= namestring
;
2512 pst
= xcoff_start_psymtab (objfile
,
2515 objfile
->global_psymbols
.next
,
2516 objfile
->static_psymbols
.next
);
2517 last_csect_name
= NULL
;
2523 complaint (&symfile_complaints
,
2524 _("Storage class %d not recognized during scan"),
2529 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2530 to handle only the C_FUN and C_EXT. */
2545 /* C_EINCL means we are switching back to the main file. But there
2546 is no reason to care; the only thing we want to know about
2547 includes is the names of all the included (.h) files. */
2552 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2556 /* I don't think the name of the common block (as opposed to the
2557 variables within it) is something which is user visible
2565 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2566 so C_LSYM would appear to be only for locals. */
2572 /* We probably could save a few instructions by assuming that
2573 C_LSYM, C_PSYM, etc., never have auxents. */
2574 int naux1
= symbol
.n_numaux
+ 1;
2577 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2583 /* Mark down an include file in the current psymtab. */
2584 enum language tmp_language
;
2586 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2589 tmp_language
= deduce_language_from_filename (namestring
);
2591 /* Only change the psymtab's language if we've learned
2592 something useful (eg. tmp_language is not language_unknown).
2593 In addition, to match what start_subfile does, never change
2595 if (tmp_language
!= language_unknown
2596 && (tmp_language
!= language_c
2597 || psymtab_language
!= language_cplus
))
2598 psymtab_language
= tmp_language
;
2600 /* In C++, one may expect the same filename to come round many
2601 times, when code is coming alternately from the main file
2602 and from inline functions in other files. So I check to see
2603 if this is a file we've seen before -- either the main
2604 source file, or a previously included file.
2606 This seems to be a lot of time to be spending on N_SOL, but
2607 things like "break c-exp.y:435" need to work (I
2608 suppose the psymtab_include_list could be hashed or put
2609 in a binary tree, if profiling shows this is a major hog). */
2610 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2616 for (i
= 0; i
< includes_used
; i
++)
2617 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2625 psymtab_include_list
[includes_used
++] = namestring
;
2626 if (includes_used
>= includes_allocated
)
2628 const char **orig
= psymtab_include_list
;
2630 psymtab_include_list
= (const char **)
2631 alloca ((includes_allocated
*= 2) *
2632 sizeof (const char *));
2633 memcpy (psymtab_include_list
, orig
,
2634 includes_used
* sizeof (const char *));
2639 /* The value of the C_FUN is not the address of the function (it
2640 appears to be the address before linking), but as long as it
2641 is smaller than the actual address, then find_pc_partial_function
2642 will use the minimal symbols instead. I hope. */
2651 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2654 p
= strchr (namestring
, ':');
2656 continue; /* Not a debugging symbol. */
2658 /* Main processing section for debugging symbols which
2659 the initial read through the symbol tables needs to worry
2660 about. If we reach this point, the symbol which we are
2661 considering is definitely one we are interested in.
2662 p must also contain the (valid) index into the namestring
2663 which indicates the debugging type symbol. */
2668 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2669 SECT_OFF_DATA (objfile
));
2671 if (gdbarch_static_transform_name_p (gdbarch
))
2672 namestring
= gdbarch_static_transform_name
2673 (gdbarch
, namestring
);
2675 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2676 VAR_DOMAIN
, LOC_STATIC
,
2677 &objfile
->static_psymbols
,
2679 psymtab_language
, objfile
);
2683 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2684 SECT_OFF_DATA (objfile
));
2685 /* The addresses in these entries are reported to be
2686 wrong. See the code that reads 'G's for symtabs. */
2687 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2688 VAR_DOMAIN
, LOC_STATIC
,
2689 &objfile
->global_psymbols
,
2691 psymtab_language
, objfile
);
2695 /* When a 'T' entry is defining an anonymous enum, it
2696 may have a name which is the empty string, or a
2697 single space. Since they're not really defining a
2698 symbol, those shouldn't go in the partial symbol
2699 table. We do pick up the elements of such enums at
2700 'check_enum:', below. */
2701 if (p
>= namestring
+ 2
2702 || (p
== namestring
+ 1
2703 && namestring
[0] != ' '))
2705 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2706 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2707 &objfile
->static_psymbols
,
2709 psymtab_language
, objfile
);
2712 /* Also a typedef with the same name. */
2713 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2714 VAR_DOMAIN
, LOC_TYPEDEF
,
2715 &objfile
->static_psymbols
,
2717 psymtab_language
, objfile
);
2724 if (p
!= namestring
) /* a name is there, not just :T... */
2726 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2727 VAR_DOMAIN
, LOC_TYPEDEF
,
2728 &objfile
->static_psymbols
,
2730 psymtab_language
, objfile
);
2733 /* If this is an enumerated type, we need to
2734 add all the enum constants to the partial symbol
2735 table. This does not cover enums without names, e.g.
2736 "enum {a, b} c;" in C, but fortunately those are
2737 rare. There is no way for GDB to find those from the
2738 enum type without spending too much time on it. Thus
2739 to solve this problem, the compiler needs to put out the
2740 enum in a nameless type. GCC2 does this. */
2742 /* We are looking for something of the form
2743 <name> ":" ("t" | "T") [<number> "="] "e"
2744 {<constant> ":" <value> ","} ";". */
2746 /* Skip over the colon and the 't' or 'T'. */
2748 /* This type may be given a number. Also, numbers can come
2749 in pairs like (0,26). Skip over it. */
2750 while ((*p
>= '0' && *p
<= '9')
2751 || *p
== '(' || *p
== ',' || *p
== ')'
2757 /* The aix4 compiler emits extra crud before the
2761 /* Skip over the type (?). */
2765 /* Skip over the colon. */
2769 /* We have found an enumerated type. */
2770 /* According to comments in read_enum_type
2771 a comma could end it instead of a semicolon.
2772 I don't know where that happens.
2774 while (*p
&& *p
!= ';' && *p
!= ',')
2778 /* Check for and handle cretinous dbx symbol name
2780 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2781 p
= next_symbol_text (objfile
);
2783 /* Point to the character after the name
2784 of the enum constant. */
2785 for (q
= p
; *q
&& *q
!= ':'; q
++)
2787 /* Note that the value doesn't matter for
2788 enum constants in psymtabs, just in symtabs. */
2789 add_psymbol_to_list (p
, q
- p
, 1,
2790 VAR_DOMAIN
, LOC_CONST
,
2791 &objfile
->static_psymbols
, 0,
2792 0, psymtab_language
, objfile
);
2793 /* Point past the name. */
2795 /* Skip over the value. */
2796 while (*p
&& *p
!= ',')
2798 /* Advance past the comma. */
2806 /* Constant, e.g. from "const" in Pascal. */
2807 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2808 VAR_DOMAIN
, LOC_CONST
,
2809 &objfile
->static_psymbols
, symbol
.n_value
,
2810 0, psymtab_language
, objfile
);
2816 int name_len
= p
- namestring
;
2817 char *name
= xmalloc (name_len
+ 1);
2819 memcpy (name
, namestring
, name_len
);
2820 name
[name_len
] = '\0';
2821 function_outside_compilation_unit_complaint (name
);
2824 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2825 SECT_OFF_TEXT (objfile
));
2826 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2827 VAR_DOMAIN
, LOC_BLOCK
,
2828 &objfile
->static_psymbols
,
2830 psymtab_language
, objfile
);
2833 /* Global functions were ignored here, but now they
2834 are put into the global psymtab like one would expect.
2835 They're also in the minimal symbol table. */
2839 int name_len
= p
- namestring
;
2840 char *name
= xmalloc (name_len
+ 1);
2842 memcpy (name
, namestring
, name_len
);
2843 name
[name_len
] = '\0';
2844 function_outside_compilation_unit_complaint (name
);
2848 /* We need only the minimal symbols for these
2849 loader-generated definitions. Keeping the global
2850 symbols leads to "in psymbols but not in symbols"
2852 if (strncmp (namestring
, "@FIX", 4) == 0)
2855 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2856 SECT_OFF_TEXT (objfile
));
2857 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2858 VAR_DOMAIN
, LOC_BLOCK
,
2859 &objfile
->global_psymbols
,
2861 psymtab_language
, objfile
);
2864 /* Two things show up here (hopefully); static symbols of
2865 local scope (static used inside braces) or extensions
2866 of structure symbols. We can ignore both. */
2880 case '#': /* For symbol identification (used in
2885 /* It is a C++ nested symbol. We don't need to record it
2886 (I don't think); if we try to look up foo::bar::baz,
2887 then symbols for the symtab containing foo should get
2888 read in, I think. */
2889 /* Someone says sun cc puts out symbols like
2890 /foo/baz/maclib::/usr/local/bin/maclib,
2891 which would get here with a symbol type of ':'. */
2895 /* Unexpected symbol descriptor. The second and
2896 subsequent stabs of a continued stab can show up
2897 here. The question is whether they ever can mimic
2898 a normal stab--it would be nice if not, since we
2899 certainly don't want to spend the time searching to
2900 the end of every string looking for a
2903 complaint (&symfile_complaints
,
2904 _("unknown symbol descriptor `%c'"), p
[1]);
2906 /* Ignore it; perhaps it is an extension that we don't
2916 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2917 ssymnum
, dependency_list
,
2918 dependencies_used
, textlow_not_set
);
2921 /* Record the toc offset value of this symbol table into objfile
2922 structure. If no XMC_TC0 is found, toc_offset should be zero.
2923 Another place to obtain this information would be file auxiliary
2926 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2929 /* Return the toc offset value for a given objfile. */
2932 xcoff_get_toc_offset (struct objfile
*objfile
)
2935 return XCOFF_DATA (objfile
)->toc_offset
;
2939 /* Scan and build partial symbols for a symbol file.
2940 We have been initialized by a call to dbx_symfile_init, which
2941 put all the relevant info into a "struct dbx_symfile_info",
2942 hung off the objfile structure.
2944 SECTION_OFFSETS contains offsets relative to which the symbols in the
2945 various sections are (depending where the sections were actually
2949 xcoff_initial_scan (struct objfile
*objfile
, int symfile_flags
)
2953 struct cleanup
*back_to
;
2954 int num_symbols
; /* # of symbols */
2955 file_ptr symtab_offset
; /* symbol table and */
2956 file_ptr stringtab_offset
; /* string table file offsets */
2957 struct coff_symfile_info
*info
;
2961 info
= XCOFF_DATA (objfile
);
2962 symfile_bfd
= abfd
= objfile
->obfd
;
2963 name
= objfile_name (objfile
);
2965 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2966 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2967 stringtab_offset
= symtab_offset
+
2968 num_symbols
* coff_data (abfd
)->local_symesz
;
2970 info
->min_lineno_offset
= 0;
2971 info
->max_lineno_offset
= 0;
2972 bfd_map_over_sections (abfd
, find_linenos
, info
);
2974 if (num_symbols
> 0)
2976 /* Read the string table. */
2977 init_stringtab (abfd
, stringtab_offset
, objfile
);
2979 /* Read the .debug section, if present. */
2981 struct bfd_section
*secp
;
2982 bfd_size_type length
;
2983 bfd_byte
*debugsec
= NULL
;
2985 secp
= bfd_get_section_by_name (abfd
, ".debug");
2988 length
= bfd_section_size (abfd
, secp
);
2991 debugsec
= obstack_alloc (&objfile
->objfile_obstack
, length
);
2993 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2995 error (_("Error reading .debug section of `%s': %s"),
2996 name
, bfd_errmsg (bfd_get_error ()));
3000 info
->debugsec
= (char *) debugsec
;
3004 /* Read the symbols. We keep them in core because we will want to
3005 access them randomly in read_symbol*. */
3006 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
3008 error (_("Error reading symbols from %s: %s"),
3009 name
, bfd_errmsg (bfd_get_error ()));
3010 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
3011 info
->symtbl
= obstack_alloc (&objfile
->objfile_obstack
, size
);
3012 info
->symtbl_num_syms
= num_symbols
;
3014 val
= bfd_bread (info
->symtbl
, size
, abfd
);
3016 perror_with_name (_("reading symbol table"));
3018 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3019 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3020 /* I'm not sure how how good num_symbols is; the rule of thumb in
3021 init_psymbol_list was developed for a.out. On the one hand,
3022 num_symbols includes auxents. On the other hand, it doesn't
3024 init_psymbol_list (objfile
, num_symbols
);
3026 free_pending_blocks ();
3027 back_to
= make_cleanup (really_free_pendings
, 0);
3029 init_minimal_symbol_collection ();
3030 make_cleanup_discard_minimal_symbols ();
3032 /* Now that the symbol table data of the executable file are all in core,
3033 process them and define symbols accordingly. */
3035 scan_xcoff_symtab (objfile
);
3037 /* Install any minimal symbols that have been collected as the current
3038 minimal symbols for this objfile. */
3040 install_minimal_symbols (objfile
);
3042 /* DWARF2 sections. */
3044 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3045 dwarf2_build_psymtabs (objfile
);
3047 dwarf2_build_frame_info (objfile
);
3049 do_cleanups (back_to
);
3053 xcoff_symfile_offsets (struct objfile
*objfile
,
3054 const struct section_addr_info
*addrs
)
3056 const char *first_section_name
;
3058 default_symfile_offsets (objfile
, addrs
);
3060 /* Oneof the weird side-effects of default_symfile_offsets is that
3061 it sometimes sets some section indices to zero for sections that,
3062 in fact do not exist. See the body of default_symfile_offsets
3063 for more info on when that happens. Undo that, as this then allows
3064 us to test whether the associated section exists or not, and then
3065 access it quickly (without searching it again). */
3067 if (objfile
->num_sections
== 0)
3068 return; /* Is that even possible? Better safe than sorry. */
3071 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3073 if (objfile
->sect_index_text
== 0
3074 && strcmp (first_section_name
, ".text") != 0)
3075 objfile
->sect_index_text
= -1;
3077 if (objfile
->sect_index_data
== 0
3078 && strcmp (first_section_name
, ".data") != 0)
3079 objfile
->sect_index_data
= -1;
3081 if (objfile
->sect_index_bss
== 0
3082 && strcmp (first_section_name
, ".bss") != 0)
3083 objfile
->sect_index_bss
= -1;
3085 if (objfile
->sect_index_rodata
== 0
3086 && strcmp (first_section_name
, ".rodata") != 0)
3087 objfile
->sect_index_rodata
= -1;
3090 /* Register our ability to parse symbols for xcoff BFD files. */
3092 static const struct sym_fns xcoff_sym_fns
=
3095 /* It is possible that coff and xcoff should be merged as
3096 they do have fundamental similarities (for example, the extra storage
3097 classes used for stabs could presumably be recognized in any COFF file).
3098 However, in addition to obvious things like all the csect hair, there are
3099 some subtler differences between xcoffread.c and coffread.c, notably
3100 the fact that coffread.c has no need to read in all the symbols, but
3101 xcoffread.c reads all the symbols and does in fact randomly access them
3102 (in C_BSTAT and line number processing). */
3104 xcoff_new_init
, /* init anything gbl to entire symtab */
3105 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3106 xcoff_initial_scan
, /* read a symbol file into symtab */
3107 NULL
, /* sym_read_psymbols */
3108 xcoff_symfile_finish
, /* finished with file, cleanup */
3109 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3110 default_symfile_segments
, /* Get segment information from a file. */
3111 aix_process_linenos
,
3112 default_symfile_relocate
, /* Relocate a debug section. */
3113 NULL
, /* sym_probe_fns */
3117 /* Same as xcoff_get_n_import_files, but for core files. */
3120 xcoff_get_core_n_import_files (bfd
*abfd
)
3122 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3124 file_ptr offset
= 0;
3128 return -1; /* Not a core file. */
3130 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3136 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3138 next
= bfd_get_32 (abfd
, buf
);
3140 break; /* This is the last entry. */
3144 /* Return the number of entries, excluding the first one, which is
3145 the path to the executable that produced this core file. */
3146 return n_entries
- 1;
3149 /* Return the number of import files (shared libraries) that the given
3150 BFD depends on. Return -1 if this number could not be computed. */
3153 xcoff_get_n_import_files (bfd
*abfd
)
3155 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3159 /* If the ".loader" section does not exist, the objfile is probably
3160 not an executable. Might be a core file... */
3162 return xcoff_get_core_n_import_files (abfd
);
3164 /* The number of entries in the Import Files Table is stored in
3165 field l_nimpid. This field is always at offset 16, and is
3166 always 4 bytes long. Read those 4 bytes. */
3168 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3170 l_nimpid
= bfd_get_32 (abfd
, buf
);
3172 /* By convention, the first entry is the default LIBPATH value
3173 to be used by the system loader, so it does not count towards
3174 the number of import files. */
3175 return l_nimpid
- 1;
3178 /* Free the per-objfile xcoff data. */
3181 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3186 /* Provide a prototype to silence -Wmissing-prototypes. */
3187 extern initialize_file_ftype _initialize_xcoffread
;
3190 _initialize_xcoffread (void)
3192 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3194 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,