1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2016 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
*, int);
200 static void scan_xcoff_symtab (struct objfile
*);
202 static char *xcoff_next_symbol_text (struct objfile
*);
204 static void record_include_begin (struct coff_symbol
*);
207 enter_line_range (struct subfile
*, unsigned, unsigned,
208 CORE_ADDR
, CORE_ADDR
, unsigned *);
210 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
212 static void xcoff_symfile_init (struct objfile
*);
214 static void xcoff_new_init (struct objfile
*);
216 static void xcoff_symfile_finish (struct objfile
*);
218 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
220 static void read_symbol (struct internal_syment
*, int);
222 static int read_symbol_lineno (int);
224 static CORE_ADDR
read_symbol_nvalue (int);
226 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
229 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
232 static void add_stab_to_list (char *, struct pending_stabs
**);
235 static int compare_lte (const void *, const void *);
237 static struct linetable
*arrange_linetable (struct linetable
*);
239 static void record_include_end (struct coff_symbol
*);
241 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
244 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
246 static int secnum_to_section (int, struct objfile
*);
247 static asection
*secnum_to_bfd_section (int, struct objfile
*);
249 struct find_targ_sec_arg
254 struct objfile
*objfile
;
257 static void find_targ_sec (bfd
*, asection
*, void *);
260 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
262 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
263 struct objfile
*objfile
= args
->objfile
;
265 if (sect
->target_index
== args
->targ_index
)
267 /* This is the section. Figure out what SECT_OFF_* code it is. */
268 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
269 *args
->resultp
= SECT_OFF_TEXT (objfile
);
270 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
271 *args
->resultp
= SECT_OFF_DATA (objfile
);
273 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
274 *args
->bfd_sect
= sect
;
278 /* Search all BFD sections for the section whose target_index is
279 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
280 associated index in the objfile's section_offset table is also
283 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
284 is set to the text section's number. */
287 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
288 asection
**bfd_sect
, int *secnum
)
290 struct find_targ_sec_arg args
;
292 args
.targ_index
= n_scnum
;
293 args
.resultp
= secnum
;
294 args
.bfd_sect
= bfd_sect
;
295 args
.objfile
= objfile
;
298 *secnum
= SECT_OFF_TEXT (objfile
);
300 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
303 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
306 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
311 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
315 /* Return the BFD section that N_SCNUM points to. */
318 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
323 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
327 /* add a given stab string into given stab vector. */
332 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
334 if (*stabvector
== NULL
)
336 *stabvector
= (struct pending_stabs
*)
337 xmalloc (sizeof (struct pending_stabs
) +
338 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
339 (*stabvector
)->count
= 0;
340 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
342 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
344 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
345 *stabvector
= (struct pending_stabs
*)
346 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
347 (*stabvector
)->length
* sizeof (char *));
349 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
354 /* Linenos are processed on a file-by-file basis.
358 1) xlc (IBM's native c compiler) postpones static function code
359 emission to the end of a compilation unit. This way it can
360 determine if those functions (statics) are needed or not, and
361 can do some garbage collection (I think). This makes line
362 numbers and corresponding addresses unordered, and we end up
363 with a line table like:
380 and that breaks gdb's binary search on line numbers, if the
381 above table is not sorted on line numbers. And that sort
382 should be on function based, since gcc can emit line numbers
385 10 0x100 - for the init/test part of a for stmt.
388 10 0x400 - for the increment part of a for stmt.
390 arrange_linetable() will do this sorting.
392 2) aix symbol table might look like:
394 c_file // beginning of a new file
395 .bi // beginning of include file
396 .ei // end of include file
400 basically, .bi/.ei pairs do not necessarily encapsulate
401 their scope. They need to be recorded, and processed later
402 on when we come the end of the compilation unit.
403 Include table (inclTable) and process_linenos() handle
409 /* compare line table entry addresses. */
412 compare_lte (const void *lte1p
, const void *lte2p
)
414 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
415 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
417 return lte1
->pc
- lte2
->pc
;
420 /* Given a line table with function entries are marked, arrange its
421 functions in ascending order and strip off function entry markers
422 and return it in a newly created table. If the old one is good
423 enough, return the old one. */
424 /* FIXME: I think all this stuff can be replaced by just passing
425 sort_linevec = 1 to end_symtab. */
427 static struct linetable
*
428 arrange_linetable (struct linetable
*oldLineTb
)
430 int ii
, jj
, newline
, /* new line count */
431 function_count
; /* # of functions */
433 struct linetable_entry
*fentry
; /* function entry vector */
434 int fentry_size
; /* # of function entries */
435 struct linetable
*newLineTb
; /* new line table */
438 #define NUM_OF_FUNCTIONS 20
440 fentry_size
= NUM_OF_FUNCTIONS
;
441 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
443 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
445 if (oldLineTb
->item
[ii
].line
== 0)
446 { /* Function entry found. */
447 if (function_count
>= fentry_size
)
448 { /* Make sure you have room. */
450 fentry
= (struct linetable_entry
*)
452 fentry_size
* sizeof (struct linetable_entry
));
454 fentry
[function_count
].line
= ii
;
455 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
458 /* If the function was compiled with XLC, we may have to add an
459 extra line entry later. Reserve space for that. */
460 if (ii
+ 1 < oldLineTb
->nitems
461 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
466 if (function_count
== 0)
471 else if (function_count
> 1)
472 qsort (fentry
, function_count
,
473 sizeof (struct linetable_entry
), compare_lte
);
475 /* Allocate a new line table. */
476 newLineTb
= (struct linetable
*)
478 (sizeof (struct linetable
) +
479 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
481 /* If line table does not start with a function beginning, copy up until
485 if (oldLineTb
->item
[0].line
!= 0)
487 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
488 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
490 /* Now copy function lines one by one. */
492 for (ii
= 0; ii
< function_count
; ++ii
)
494 /* If the function was compiled with XLC, we may have to add an
495 extra line to cover the function prologue. */
496 jj
= fentry
[ii
].line
;
497 if (jj
+ 1 < oldLineTb
->nitems
498 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
500 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
501 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
505 for (jj
= fentry
[ii
].line
+ 1;
506 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
508 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
511 /* The number of items in the line table must include these
512 extra lines which were added in case of XLC compiled functions. */
513 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
517 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
518 following `IncludeChain'. At the end of each symtab (end_symtab),
519 we will determine if we should create additional symtab's to
520 represent if (the include files. */
523 typedef struct _inclTable
525 char *name
; /* include filename */
527 /* Offsets to the line table. end points to the last entry which is
528 part of this include file. */
531 struct subfile
*subfile
;
532 unsigned funStartLine
; /* Start line # of its function. */
536 #define INITIAL_INCLUDE_TABLE_LENGTH 20
537 static InclTable
*inclTable
; /* global include table */
538 static int inclIndx
; /* last entry to table */
539 static int inclLength
; /* table length */
540 static int inclDepth
; /* nested include depth */
542 static void allocate_include_entry (void);
545 record_include_begin (struct coff_symbol
*cs
)
549 /* In xcoff, we assume include files cannot be nested (not in .c files
550 of course, but in corresponding .s files.). */
552 /* This can happen with old versions of GCC.
553 GCC 2.3.3-930426 does not exhibit this on a test case which
554 a user said produced the message for him. */
555 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
559 allocate_include_entry ();
561 inclTable
[inclIndx
].name
= cs
->c_name
;
562 inclTable
[inclIndx
].begin
= cs
->c_value
;
566 record_include_end (struct coff_symbol
*cs
)
572 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
575 allocate_include_entry ();
577 pTbl
= &inclTable
[inclIndx
];
578 pTbl
->end
= cs
->c_value
;
585 allocate_include_entry (void)
587 if (inclTable
== NULL
)
589 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
590 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
593 else if (inclIndx
>= inclLength
)
595 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
596 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
597 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
598 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
602 /* Global variable to pass the psymtab down to all the routines involved
603 in psymtab to symtab processing. */
604 static struct partial_symtab
*this_symtab_psymtab
;
606 /* Objfile related to this_symtab_psymtab; set at the same time. */
607 static struct objfile
*this_symtab_objfile
;
609 /* given the start and end addresses of a compilation unit (or a csect,
610 at times) process its lines and create appropriate line vectors. */
613 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
617 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
619 /* subfile structure for the main compilation unit. */
620 struct subfile main_subfile
;
622 /* In the main source file, any time we see a function entry, we
623 reset this variable to function's absolute starting line number.
624 All the following line numbers in the function are relative to
625 this, and we record absolute line numbers in record_line(). */
627 unsigned int main_source_baseline
= 0;
632 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
634 goto return_after_cleanup
;
636 memset (&main_subfile
, '\0', sizeof (main_subfile
));
639 /* All source lines were in the main source file. None in include
642 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
643 &main_source_baseline
);
647 /* There was source with line numbers in include files. */
650 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
651 main_source_baseline
= 0;
653 for (ii
= 0; ii
< inclIndx
; ++ii
)
655 struct subfile
*tmpSubfile
;
657 /* If there is main file source before include file, enter it. */
658 if (offset
< inclTable
[ii
].begin
)
661 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
662 start
, 0, &main_source_baseline
);
665 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
667 /* The entry in the include table refers to the main source
668 file. Add the lines to the main subfile. */
670 main_source_baseline
= inclTable
[ii
].funStartLine
;
672 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
673 start
, 0, &main_source_baseline
);
674 inclTable
[ii
].subfile
= &main_subfile
;
678 /* Have a new subfile for the include file. */
680 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
682 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
683 firstLine
= &(inclTable
[ii
].funStartLine
);
685 /* Enter include file's lines now. */
686 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
687 inclTable
[ii
].end
, start
, 0, firstLine
);
690 if (offset
<= inclTable
[ii
].end
)
691 offset
= inclTable
[ii
].end
+ linesz
;
694 /* All the include files' line have been processed at this point. Now,
695 enter remaining lines of the main file, if any left. */
696 if (offset
< max_offset
+ 1 - linesz
)
698 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
699 &main_source_baseline
);
703 /* Process main file's line numbers. */
704 if (main_subfile
.line_vector
)
706 struct linetable
*lineTb
, *lv
;
708 lv
= main_subfile
.line_vector
;
710 /* Line numbers are not necessarily ordered. xlc compilation will
711 put static function to the end. */
713 lineTb
= arrange_linetable (lv
);
716 current_subfile
->line_vector
= (struct linetable
*)
717 xrealloc (lv
, (sizeof (struct linetable
)
718 + lv
->nitems
* sizeof (struct linetable_entry
)));
723 current_subfile
->line_vector
= lineTb
;
726 current_subfile
->line_vector_length
=
727 current_subfile
->line_vector
->nitems
;
730 /* Now, process included files' line numbers. */
732 for (ii
= 0; ii
< inclIndx
; ++ii
)
734 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
735 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
738 struct linetable
*lineTb
, *lv
;
740 lv
= (inclTable
[ii
].subfile
)->line_vector
;
742 /* Line numbers are not necessarily ordered. xlc compilation will
743 put static function to the end. */
745 lineTb
= arrange_linetable (lv
);
749 /* For the same include file, we might want to have more than one
750 subfile. This happens if we have something like:
758 while foo.h including code in it. (stupid but possible)
759 Since start_subfile() looks at the name and uses an
760 existing one if finds, we need to provide a fake name and
764 start_subfile (inclTable
[ii
].name
);
767 /* Pick a fake name that will produce the same results as this
768 one when passed to deduce_language_from_filename. Kludge on
770 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
772 if (fakename
== NULL
)
774 start_subfile (fakename
);
775 xfree (current_subfile
->name
);
777 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
782 current_subfile
->line_vector
=
783 (struct linetable
*) xrealloc
784 (lv
, (sizeof (struct linetable
)
785 + lv
->nitems
* sizeof (struct linetable_entry
)));
791 current_subfile
->line_vector
= lineTb
;
794 current_subfile
->line_vector_length
=
795 current_subfile
->line_vector
->nitems
;
796 start_subfile (pop_subfile ());
800 return_after_cleanup
:
802 /* We don't want to keep alloc/free'ing the global include file table. */
807 aix_process_linenos (struct objfile
*objfile
)
809 /* There is no linenos to read if there are only dwarf info. */
810 if (this_symtab_psymtab
== NULL
)
813 /* Process line numbers and enter them into line vector. */
814 process_linenos (last_source_start_addr
, cur_src_end_addr
);
818 /* Enter a given range of lines into the line vector.
819 can be called in the following two ways:
820 enter_line_range (subfile, beginoffset, endoffset,
821 startaddr, 0, firstLine) or
822 enter_line_range (subfile, beginoffset, 0,
823 startaddr, endaddr, firstLine)
825 endoffset points to the last line table entry that we should pay
829 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
830 unsigned endoffset
, /* offsets to line table */
831 CORE_ADDR startaddr
, /* offsets to line table */
832 CORE_ADDR endaddr
, unsigned *firstLine
)
834 struct objfile
*objfile
= this_symtab_objfile
;
835 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
836 unsigned int curoffset
;
839 struct internal_lineno int_lnno
;
840 unsigned int limit_offset
;
844 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
846 curoffset
= beginoffset
;
847 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
851 if (endoffset
>= limit_offset
)
853 complaint (&symfile_complaints
,
854 _("Bad line table offset in C_EINCL directive"));
857 limit_offset
= endoffset
;
862 abfd
= objfile
->obfd
;
863 linesz
= coff_data (abfd
)->local_linesz
;
864 ext_lnno
= alloca (linesz
);
866 while (curoffset
<= limit_offset
)
868 bfd_seek (abfd
, curoffset
, SEEK_SET
);
869 bfd_bread (ext_lnno
, linesz
, abfd
);
870 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
872 /* Find the address this line represents. */
873 addr
= (int_lnno
.l_lnno
874 ? int_lnno
.l_addr
.l_paddr
875 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
876 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
878 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
881 if (int_lnno
.l_lnno
== 0)
883 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
884 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
888 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
889 gdbarch_addr_bits_remove (gdbarch
, addr
));
895 /* Save the vital information for use when closing off the current file.
896 NAME is the file name the symbols came from, START_ADDR is the first
897 text address for the file, and SIZE is the number of bytes of text. */
899 #define complete_symtab(name, start_addr) { \
900 set_last_source_file (name); \
901 last_source_start_addr = start_addr; \
905 /* Refill the symbol table input buffer
906 and set the variables that control fetching entries from it.
907 Reports an error if no data available.
908 This function can read past the end of the symbol table
909 (into the string table) but this does no harm. */
911 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
913 Creation of all new minimal symbols should go through this function
914 rather than calling the various prim_record_[...] functions in order
915 to make sure that all symbol addresses get properly relocated.
919 NAME - the symbol's name (but if NAME starts with a period, that
920 leading period is discarded).
921 ADDRESS - the symbol's address, prior to relocation. This function
922 relocates the address before recording the minimal symbol.
923 MS_TYPE - the symbol's type.
924 N_SCNUM - the symbol's XCOFF section number.
925 OBJFILE - the objfile associated with the minimal symbol. */
928 record_minimal_symbol (const char *name
, CORE_ADDR address
,
929 enum minimal_symbol_type ms_type
,
931 struct objfile
*objfile
)
933 int section
= secnum_to_section (n_scnum
, objfile
);
938 prim_record_minimal_symbol_and_info (name
, address
, ms_type
,
939 secnum_to_section (n_scnum
, objfile
),
943 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
944 nested. At any given time, a symbol can only be in one static block.
945 This is the base address of current static block, zero if non exists. */
947 static int static_block_base
= 0;
949 /* Section number for the current static block. */
951 static int static_block_section
= -1;
953 /* true if space for symbol name has been allocated. */
955 static int symname_alloced
= 0;
957 /* Next symbol to read. Pointer into raw seething symbol table. */
959 static char *raw_symbol
;
961 /* This is the function which stabsread.c calls to get symbol
965 xcoff_next_symbol_text (struct objfile
*objfile
)
967 struct internal_syment symbol
;
970 /* FIXME: is this the same as the passed arg? */
971 if (this_symtab_objfile
)
972 objfile
= this_symtab_objfile
;
974 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
977 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
979 /* Return something which points to '\0' and hope the symbol reading
980 code does something reasonable. */
983 else if (symbol
.n_sclass
& 0x80)
985 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
986 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
991 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
993 /* Return something which points to '\0' and hope the symbol reading
994 code does something reasonable. */
1000 /* Read symbols for a given partial symbol table. */
1003 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1005 bfd
*abfd
= objfile
->obfd
;
1006 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1007 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1008 char *strtbl
= xcoff
->strtbl
;
1009 char *debugsec
= xcoff
->debugsec
;
1010 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1012 struct internal_syment symbol
[1];
1013 union internal_auxent main_aux
;
1014 struct coff_symbol cs
[1];
1015 CORE_ADDR file_start_addr
= 0;
1016 CORE_ADDR file_end_addr
= 0;
1018 int next_file_symnum
= -1;
1019 unsigned int max_symnum
;
1020 int just_started
= 1;
1022 CORE_ADDR fcn_start_addr
= 0;
1024 struct coff_symbol fcn_stab_saved
= { 0 };
1026 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1027 union internal_auxent fcn_aux_saved
= main_aux
;
1028 struct context_stack
*newobj
;
1030 char *filestring
= " _start_ "; /* Name of the current file. */
1032 const char *last_csect_name
; /* Last seen csect's name. */
1034 this_symtab_psymtab
= pst
;
1035 this_symtab_objfile
= objfile
;
1037 /* Get the appropriate COFF "constants" related to the file we're
1039 local_symesz
= coff_data (abfd
)->local_symesz
;
1041 set_last_source_file (NULL
);
1042 last_csect_name
= 0;
1045 start_symtab (objfile
, filestring
, (char *) NULL
, file_start_addr
);
1046 record_debugformat (debugfmt
);
1047 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1049 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1050 first_object_file_end
= 0;
1052 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1054 while (symnum
< max_symnum
)
1056 QUIT
; /* make this command interruptable. */
1058 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1059 /* read one symbol into `cs' structure. After processing the
1060 whole symbol table, only string table will be kept in memory,
1061 symbol table and debug section of xcoff will be freed. Thus
1062 we can mark symbols with names in string table as
1067 /* Swap and align the symbol into a reasonable C structure. */
1068 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1070 cs
->c_symnum
= symnum
;
1071 cs
->c_naux
= symbol
->n_numaux
;
1072 if (symbol
->n_zeroes
)
1074 symname_alloced
= 0;
1075 /* We must use the original, unswapped, name here so the name field
1076 pointed to by cs->c_name will persist throughout xcoffread. If
1077 we use the new field, it gets overwritten for each symbol. */
1078 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1079 /* If it's exactly E_SYMNMLEN characters long it isn't
1081 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1085 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1087 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1088 p
[E_SYMNMLEN
] = '\0';
1090 symname_alloced
= 1;
1093 else if (symbol
->n_sclass
& 0x80)
1095 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1096 symname_alloced
= 0;
1100 /* in string table */
1101 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1102 symname_alloced
= 1;
1104 cs
->c_value
= symbol
->n_value
;
1105 cs
->c_sclass
= symbol
->n_sclass
;
1106 cs
->c_secnum
= symbol
->n_scnum
;
1107 cs
->c_type
= (unsigned) symbol
->n_type
;
1109 raw_symbol
+= local_symesz
;
1112 /* Save addr of first aux entry. */
1113 raw_auxptr
= raw_symbol
;
1115 /* Skip all the auxents associated with this symbol. */
1116 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1118 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1123 /* if symbol name starts with ".$" or "$", ignore it. */
1124 if (cs
->c_name
[0] == '$'
1125 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1128 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1130 if (get_last_source_file ())
1132 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1133 SECT_OFF_TEXT (objfile
));
1138 start_symtab (objfile
, "_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1139 record_debugformat (debugfmt
);
1140 cur_src_end_addr
= first_object_file_end
;
1141 /* Done with all files, everything from here on is globals. */
1144 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1147 /* Dealing with a symbol with a csect entry. */
1149 #define CSECT(PP) ((PP)->x_csect)
1150 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1151 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1152 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1153 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1155 /* Convert the auxent to something we can access. */
1156 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1157 0, cs
->c_naux
, &main_aux
);
1159 switch (CSECT_SMTYP (&main_aux
))
1163 /* Ignore all external references. */
1167 /* A section description. */
1169 switch (CSECT_SCLAS (&main_aux
))
1175 /* A program csect is seen. We have to allocate one
1176 symbol table for each program csect. Normally gdb
1177 prefers one symtab for each source file. In case
1178 of AIX, one source file might include more than one
1179 [PR] csect, and they don't have to be adjacent in
1180 terms of the space they occupy in memory. Thus, one
1181 single source file might get fragmented in the
1182 memory and gdb's file start and end address
1183 approach does not work! GCC (and I think xlc) seem
1184 to put all the code in the unnamed program csect. */
1186 if (last_csect_name
)
1188 complete_symtab (filestring
, file_start_addr
);
1189 cur_src_end_addr
= file_end_addr
;
1190 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1193 /* Give all csects for this source file the same
1195 start_symtab (objfile
, filestring
, NULL
,
1197 record_debugformat (debugfmt
);
1200 /* If this is the very first csect seen,
1201 basically `__start'. */
1204 first_object_file_end
1205 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1210 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1211 SECT_OFF_TEXT (objfile
));
1212 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1214 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1215 last_csect_name
= cs
->c_name
;
1219 /* All other symbols are put into the minimal symbol
1232 /* Ignore the symbol. */
1240 switch (CSECT_SCLAS (&main_aux
))
1243 /* a function entry point. */
1244 function_entry_point
:
1246 fcn_start_addr
= cs
->c_value
;
1248 /* save the function header info, which will be used
1249 when `.bf' is seen. */
1251 fcn_aux_saved
= main_aux
;
1255 /* shared library function trampoline code entry point. */
1259 /* The symbols often have the same names as debug symbols for
1260 functions, and confuse lookup_symbol. */
1264 /* xlc puts each variable in a separate csect, so we get
1265 an XTY_SD for each variable. But gcc puts several
1266 variables in a csect, so that each variable only gets
1267 an XTY_LD. This will typically be XMC_RW; I suspect
1268 XMC_RO and XMC_BS might be possible too.
1269 These variables are put in the minimal symbol table
1276 /* Common symbols are put into the minimal symbol table only. */
1284 /* If explicitly specified as a function, treat is as one. This check
1285 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1286 after the above CSECT check. */
1287 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1289 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1290 0, cs
->c_naux
, &main_aux
);
1291 goto function_entry_point
;
1294 switch (cs
->c_sclass
)
1298 /* c_value field contains symnum of next .file entry in table
1299 or symnum of first global after last .file. */
1301 next_file_symnum
= cs
->c_value
;
1303 /* Complete symbol table for last object file containing
1304 debugging information. */
1306 /* Whether or not there was a csect in the previous file, we
1307 have to call `end_stabs' and `start_stabs' to reset
1308 type_vector, line_vector, etc. structures. */
1310 complete_symtab (filestring
, file_start_addr
);
1311 cur_src_end_addr
= file_end_addr
;
1312 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1315 /* XCOFF, according to the AIX 3.2 documentation, puts the
1316 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1317 do things the standard COFF way and put it in the auxent.
1318 We use the auxent if the symbol is ".file" and an auxent
1319 exists, otherwise use the symbol itself. Simple
1321 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1323 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1324 0, cs
->c_naux
, &main_aux
);
1325 filestring
= coff_getfilename (&main_aux
, objfile
);
1328 filestring
= cs
->c_name
;
1331 start_symtab (objfile
, filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1332 record_debugformat (debugfmt
);
1333 last_csect_name
= 0;
1335 /* reset file start and end addresses. A compilation unit
1336 with no text (only data) should have zero file
1338 file_start_addr
= file_end_addr
= 0;
1342 fcn_stab_saved
= *cs
;
1346 if (strcmp (cs
->c_name
, ".bf") == 0)
1348 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1349 SECT_OFF_TEXT (objfile
));
1351 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1352 0, cs
->c_naux
, &main_aux
);
1354 within_function
= 1;
1356 newobj
= push_context (0, fcn_start_addr
+ off
);
1358 newobj
->name
= define_symbol
1359 (fcn_cs_saved
.c_value
+ off
,
1360 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1361 if (newobj
->name
!= NULL
)
1362 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1364 else if (strcmp (cs
->c_name
, ".ef") == 0)
1366 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1367 0, cs
->c_naux
, &main_aux
);
1369 /* The value of .ef is the address of epilogue code;
1370 not useful for gdb. */
1371 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1372 contains number of lines to '}' */
1374 if (context_stack_depth
<= 0)
1375 { /* We attempted to pop an empty context stack. */
1376 ef_complaint (cs
->c_symnum
);
1377 within_function
= 0;
1380 newobj
= pop_context ();
1381 /* Stack must be empty now. */
1382 if (context_stack_depth
> 0 || newobj
== NULL
)
1384 ef_complaint (cs
->c_symnum
);
1385 within_function
= 0;
1389 finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
1390 NULL
, newobj
->start_addr
,
1391 (fcn_cs_saved
.c_value
1392 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1393 + ANOFFSET (objfile
->section_offsets
,
1394 SECT_OFF_TEXT (objfile
))));
1395 within_function
= 0;
1400 /* Begin static block. */
1402 struct internal_syment symbol
;
1404 read_symbol (&symbol
, cs
->c_value
);
1405 static_block_base
= symbol
.n_value
;
1406 static_block_section
=
1407 secnum_to_section (symbol
.n_scnum
, objfile
);
1412 /* End of static block. */
1413 static_block_base
= 0;
1414 static_block_section
= -1;
1425 complaint (&symfile_complaints
,
1426 _("Unrecognized storage class %d."),
1441 /* beginning of include file */
1442 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1443 order. Thus, when wee see them, we might not know enough info
1444 to process them. Thus, we'll be saving them into a table
1445 (inclTable) and postpone their processing. */
1447 record_include_begin (cs
);
1451 /* End of include file. */
1452 /* See the comment after case C_BINCL. */
1453 record_include_end (cs
);
1457 if (strcmp (cs
->c_name
, ".bb") == 0)
1460 newobj
= push_context (depth
,
1462 + ANOFFSET (objfile
->section_offsets
,
1463 SECT_OFF_TEXT (objfile
))));
1465 else if (strcmp (cs
->c_name
, ".eb") == 0)
1467 if (context_stack_depth
<= 0)
1468 { /* We attempted to pop an empty context stack. */
1469 eb_complaint (cs
->c_symnum
);
1472 newobj
= pop_context ();
1473 if (depth
-- != newobj
->depth
)
1475 eb_complaint (cs
->c_symnum
);
1478 if (local_symbols
&& context_stack_depth
> 0)
1480 /* Make a block for the local symbols within. */
1481 finish_block (newobj
->name
, &local_symbols
,
1482 newobj
->old_blocks
, NULL
,
1485 + ANOFFSET (objfile
->section_offsets
,
1486 SECT_OFF_TEXT (objfile
))));
1488 local_symbols
= newobj
->locals
;
1493 process_xcoff_symbol (cs
, objfile
);
1498 if (get_last_source_file ())
1500 struct compunit_symtab
*cust
;
1502 complete_symtab (filestring
, file_start_addr
);
1503 cur_src_end_addr
= file_end_addr
;
1504 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1505 /* When reading symbols for the last C_FILE of the objfile, try
1506 to make sure that we set pst->compunit_symtab to the symtab for the
1507 file, not to the _globals_ symtab. I'm not sure whether this
1508 actually works right or when/if it comes up. */
1509 if (pst
->compunit_symtab
== NULL
)
1510 pst
->compunit_symtab
= cust
;
1515 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1516 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1517 *(SYMBOL2) = *(SYMBOL1);
1520 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1521 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1522 (NAME), strlen (NAME)))
1525 /* process one xcoff symbol. */
1527 static struct symbol
*
1528 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1530 struct symbol onesymbol
;
1531 struct symbol
*sym
= &onesymbol
;
1532 struct symbol
*sym2
= NULL
;
1538 if (cs
->c_secnum
< 0)
1540 /* The value is a register number, offset within a frame, etc.,
1541 and does not get relocated. */
1547 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1548 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1555 initialize_objfile_symbol (sym
);
1557 /* default assumptions */
1558 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1559 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1560 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1562 if (ISFCN (cs
->c_type
))
1564 /* At this point, we don't know the type of the function. This
1565 will be patched with the type from its stab entry later on in
1566 patch_block_stabs (), unless the file was compiled without -g. */
1568 SYMBOL_SET_LINKAGE_NAME (sym
, ((const char *)
1569 SYMNAME_ALLOC (name
, symname_alloced
)));
1570 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1572 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1573 SYMBOL_DUP (sym
, sym2
);
1575 if (cs
->c_sclass
== C_EXT
)
1576 add_symbol_to_list (sym2
, &global_symbols
);
1577 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1578 add_symbol_to_list (sym2
, &file_symbols
);
1582 /* In case we can't figure out the type, provide default. */
1583 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1585 switch (cs
->c_sclass
)
1588 /* The values of functions and global symbols are now resolved
1589 via the global_sym_chain in stabsread.c. */
1591 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1592 add_stab_to_list (name
, &global_stabs
);
1594 add_stab_to_list (name
, &file_stabs
);
1598 add_stab_to_list (name
, &global_stabs
);
1603 common_block_start (cs
->c_name
, objfile
);
1607 common_block_end (objfile
);
1611 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1624 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1627 SYMBOL_SECTION (sym
) = sec
;
1634 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1635 all statics and we need to distinguish file-scope versus
1636 function-scope using within_function. We do this by
1637 changing the string we pass to define_symbol to use 'S'
1638 where we need to, which is not necessarily super-clean,
1639 but seems workable enough. */
1644 pp
= strchr (name
, ':');
1649 if (*pp
== 'V' && !within_function
)
1651 sym
= define_symbol ((cs
->c_value
1652 + ANOFFSET (objfile
->section_offsets
,
1653 static_block_section
)),
1654 cs
->c_name
, 0, 0, objfile
);
1657 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1658 SYMBOL_SECTION (sym
) = static_block_section
;
1667 /* Extract the file name from the aux entry of a C_FILE symbol.
1668 Result is in static storage and is only good for temporary use. */
1671 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1673 static char buffer
[BUFSIZ
];
1675 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1676 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1677 + aux_entry
->x_file
.x_n
.x_offset
));
1680 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1681 buffer
[FILNMLEN
] = '\0';
1686 /* Set *SYMBOL to symbol number symno in symtbl. */
1688 read_symbol (struct internal_syment
*symbol
, int symno
)
1690 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1691 int nsyms
= xcoff
->symtbl_num_syms
;
1692 char *stbl
= xcoff
->symtbl
;
1694 if (symno
< 0 || symno
>= nsyms
)
1696 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1697 symbol
->n_value
= 0;
1698 symbol
->n_scnum
= -1;
1701 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1702 stbl
+ (symno
* local_symesz
),
1706 /* Get value corresponding to symbol number symno in symtbl. */
1709 read_symbol_nvalue (int symno
)
1711 struct internal_syment symbol
[1];
1713 read_symbol (symbol
, symno
);
1714 return symbol
->n_value
;
1718 /* Find the address of the function corresponding to symno, where
1719 symno is the symbol pointed to by the linetable. */
1722 read_symbol_lineno (int symno
)
1724 struct objfile
*objfile
= this_symtab_objfile
;
1725 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1727 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1728 int nsyms
= info
->symtbl_num_syms
;
1729 char *stbl
= info
->symtbl
;
1730 char *strtbl
= info
->strtbl
;
1732 struct internal_syment symbol
[1];
1733 union internal_auxent main_aux
[1];
1737 bf_notfound_complaint ();
1741 /* Note that just searching for a short distance (e.g. 50 symbols)
1742 is not enough, at least in the following case.
1745 [many .stabx entries]
1746 [a few functions, referring to foo]
1750 What happens here is that the assembler moves the .stabx entries
1751 to right before the ".bf" for foo, but the symbol for "foo" is before
1752 all the stabx entries. See PR gdb/2222. */
1754 /* Maintaining a table of .bf entries might be preferable to this search.
1755 If I understand things correctly it would need to be done only for
1756 the duration of a single psymtab to symtab conversion. */
1757 while (symno
< nsyms
)
1759 bfd_coff_swap_sym_in (symfile_bfd
,
1760 stbl
+ (symno
* local_symesz
), symbol
);
1761 if (symbol
->n_sclass
== C_FCN
)
1763 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1765 if (strcmp (name
, ".bf") == 0)
1768 symno
+= symbol
->n_numaux
+ 1;
1771 bf_notfound_complaint ();
1775 /* Take aux entry and return its lineno. */
1777 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1778 symbol
->n_type
, symbol
->n_sclass
,
1779 0, symbol
->n_numaux
, main_aux
);
1781 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1784 /* Support for line number handling. */
1786 /* This function is called for every section; it finds the outer limits
1787 * of the line table (minimum and maximum file offset) so that the
1788 * mainline code can read the whole thing for efficiency.
1791 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1793 struct coff_symfile_info
*info
;
1795 file_ptr offset
, maxoff
;
1797 count
= asect
->lineno_count
;
1799 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1802 size
= count
* coff_data (abfd
)->local_linesz
;
1803 info
= (struct coff_symfile_info
*) vpinfo
;
1804 offset
= asect
->line_filepos
;
1805 maxoff
= offset
+ size
;
1807 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1808 info
->min_lineno_offset
= offset
;
1810 if (maxoff
> info
->max_lineno_offset
)
1811 info
->max_lineno_offset
= maxoff
;
1815 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1817 struct cleanup
*old_chain
;
1826 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1831 /* Read in all partial symtabs on which this one is dependent. */
1832 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1833 if (!pst
->dependencies
[i
]->readin
)
1835 /* Inform about additional files that need to be read in. */
1838 fputs_filtered (" ", gdb_stdout
);
1840 fputs_filtered ("and ", gdb_stdout
);
1842 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1843 wrap_here (""); /* Flush output */
1844 gdb_flush (gdb_stdout
);
1846 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1849 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1851 /* Init stuff necessary for reading in symbols. */
1854 old_chain
= make_cleanup (really_free_pendings
, 0);
1856 read_xcoff_symtab (objfile
, pst
);
1858 do_cleanups (old_chain
);
1864 /* Read in all of the symbols for a given psymtab for real.
1865 Be verbose about it if the user wants that. SELF is not NULL. */
1868 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1873 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1878 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1879 || self
->number_of_dependencies
)
1881 /* Print the message now, before reading the string table,
1882 to avoid disconcerting pauses. */
1885 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1886 gdb_flush (gdb_stdout
);
1889 next_symbol_text_func
= xcoff_next_symbol_text
;
1891 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1893 /* Match with global symbols. This only needs to be done once,
1894 after all of the symtabs and dependencies have been read in. */
1895 scan_file_globals (objfile
);
1897 /* Finish up the debug error message. */
1899 printf_filtered ("done.\n");
1904 xcoff_new_init (struct objfile
*objfile
)
1906 stabsread_new_init ();
1907 buildsym_new_init ();
1910 /* Do initialization in preparation for reading symbols from OBJFILE.
1912 We will only be called if this is an XCOFF or XCOFF-like file.
1913 BFD handles figuring out the format of the file, and code in symfile.c
1914 uses BFD's determination to vector to us. */
1917 xcoff_symfile_init (struct objfile
*objfile
)
1919 struct coff_symfile_info
*xcoff
;
1921 /* Allocate struct to keep track of the symfile. */
1922 xcoff
= XNEW (struct coff_symfile_info
);
1923 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1925 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1926 find this causes a significant slowdown in gdb then we could
1927 set it in the debug symbol readers only when necessary. */
1928 objfile
->flags
|= OBJF_REORDERED
;
1931 /* Perform any local cleanups required when we are done with a particular
1932 objfile. I.E, we are in the process of discarding all symbol information
1933 for an objfile, freeing up all memory held for it, and unlinking the
1934 objfile struct from the global list of known objfiles. */
1937 xcoff_symfile_finish (struct objfile
*objfile
)
1939 /* Start with a fresh include table for the next objfile. */
1945 inclIndx
= inclLength
= inclDepth
= 0;
1947 dwarf2_free_objfile (objfile
);
1952 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1956 unsigned char lengthbuf
[4];
1958 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1960 xcoff
->strtbl
= NULL
;
1962 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1963 error (_("cannot seek to string table in %s: %s"),
1964 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1966 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1967 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1969 /* If no string table is needed, then the file may end immediately
1970 after the symbols. Just return with `strtbl' set to NULL. */
1972 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1975 /* Allocate string table from objfile_obstack. We will need this table
1976 as long as we have its symbol table around. */
1978 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1979 xcoff
->strtbl
= strtbl
;
1981 /* Copy length buffer, the first byte is usually zero and is
1982 used for stabs with a name length of zero. */
1983 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1984 if (length
== sizeof lengthbuf
)
1987 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1989 if (val
!= length
- sizeof lengthbuf
)
1990 error (_("cannot read string table from %s: %s"),
1991 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1992 if (strtbl
[length
- 1] != '\0')
1993 error (_("bad symbol file: string table "
1994 "does not end with null character"));
1999 /* If we have not yet seen a function for this psymtab, this is 0. If we
2000 have seen one, it is the offset in the line numbers of the line numbers
2002 static unsigned int first_fun_line_offset
;
2004 /* Allocate and partially fill a partial symtab. It will be
2005 completely filled at the end of the symbol list.
2007 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2008 is the address relative to which its symbols are (incremental) or 0
2011 static struct partial_symtab
*
2012 xcoff_start_psymtab (struct objfile
*objfile
,
2013 const char *filename
, int first_symnum
,
2014 struct partial_symbol
**global_syms
,
2015 struct partial_symbol
**static_syms
)
2017 struct partial_symtab
*result
=
2018 start_psymtab_common (objfile
,
2020 /* We fill in textlow later. */
2022 global_syms
, static_syms
);
2024 result
->read_symtab_private
=
2025 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2026 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2027 result
->read_symtab
= xcoff_read_symtab
;
2029 /* Deduce the source language from the filename for this psymtab. */
2030 psymtab_language
= deduce_language_from_filename (filename
);
2035 /* Close off the current usage of PST.
2036 Returns PST, or NULL if the partial symtab was empty and thrown away.
2038 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2040 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2041 are the information for includes and dependencies. */
2043 static struct partial_symtab
*
2044 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2045 const char **include_list
, int num_includes
,
2046 int capping_symbol_number
,
2047 struct partial_symtab
**dependency_list
,
2048 int number_dependencies
, int textlow_not_set
)
2052 if (capping_symbol_number
!= -1)
2053 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2054 capping_symbol_number
2055 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2056 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2057 first_fun_line_offset
;
2058 first_fun_line_offset
= 0;
2060 end_psymtab_common (objfile
, pst
);
2062 pst
->number_of_dependencies
= number_dependencies
;
2063 if (number_dependencies
)
2065 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2066 struct partial_symtab
*,
2067 number_dependencies
);
2068 memcpy (pst
->dependencies
, dependency_list
,
2069 number_dependencies
* sizeof (struct partial_symtab
*));
2072 pst
->dependencies
= 0;
2074 for (i
= 0; i
< num_includes
; i
++)
2076 struct partial_symtab
*subpst
=
2077 allocate_psymtab (include_list
[i
], objfile
);
2079 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2080 sizeof (struct symloc
));
2081 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2082 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2083 subpst
->textlow
= 0;
2084 subpst
->texthigh
= 0;
2086 /* We could save slight bits of space by only making one of these,
2087 shared by the entire set of include files. FIXME-someday. */
2088 subpst
->dependencies
=
2089 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2090 subpst
->dependencies
[0] = pst
;
2091 subpst
->number_of_dependencies
= 1;
2093 subpst
->globals_offset
=
2094 subpst
->n_global_syms
=
2095 subpst
->statics_offset
=
2096 subpst
->n_static_syms
= 0;
2099 subpst
->compunit_symtab
= NULL
;
2100 subpst
->read_symtab
= pst
->read_symtab
;
2103 if (num_includes
== 0
2104 && number_dependencies
== 0
2105 && pst
->n_global_syms
== 0
2106 && pst
->n_static_syms
== 0)
2108 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2109 it is on the obstack, but we can forget to chain it on the list. */
2110 /* Empty psymtabs happen as a result of header files which don't have
2111 any symbols in them. There can be a lot of them. */
2113 discard_psymtab (objfile
, pst
);
2115 /* Indicate that psymtab was thrown away. */
2121 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2122 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2123 the symbol and its auxents. */
2126 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2127 const char **name
, char **raw
, unsigned int *symnump
,
2128 struct objfile
*objfile
)
2130 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2131 if (symbol
->n_zeroes
)
2133 /* If it's exactly E_SYMNMLEN characters long it isn't
2135 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2137 /* FIXME: wastes memory for symbols which we don't end up putting
2138 into the minimal symbols. */
2141 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2143 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2144 p
[E_SYMNMLEN
] = '\0';
2148 /* Point to the unswapped name as that persists as long as the
2150 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2152 else if (symbol
->n_sclass
& 0x80)
2154 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2158 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2161 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2162 if (symbol
->n_numaux
> 0)
2164 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2165 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2167 *symnump
+= symbol
->n_numaux
;
2168 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2173 function_outside_compilation_unit_complaint (const char *arg1
)
2175 complaint (&symfile_complaints
,
2176 _("function `%s' appears to be defined "
2177 "outside of all compilation units"),
2182 scan_xcoff_symtab (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
;
2189 int past_first_source_file
= 0;
2194 /* Current partial symtab */
2195 struct partial_symtab
*pst
;
2197 /* List of current psymtab's include files. */
2198 const char **psymtab_include_list
;
2199 int includes_allocated
;
2202 /* Index within current psymtab dependency list. */
2203 struct partial_symtab
**dependency_list
;
2204 int dependencies_used
, dependencies_allocated
;
2207 struct internal_syment symbol
;
2208 union internal_auxent main_aux
[5];
2209 unsigned int ssymnum
;
2211 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2212 CORE_ADDR last_csect_val
= 0;
2213 int last_csect_sec
= 0;
2214 int misc_func_recorded
= 0; /* true if any misc. function. */
2215 int textlow_not_set
= 1;
2217 pst
= (struct partial_symtab
*) 0;
2219 includes_allocated
= 30;
2221 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2222 sizeof (const char *));
2224 dependencies_allocated
= 30;
2225 dependencies_used
= 0;
2227 (struct partial_symtab
**) alloca (dependencies_allocated
*
2228 sizeof (struct partial_symtab
*));
2230 set_last_source_file (NULL
);
2232 abfd
= objfile
->obfd
;
2233 next_symbol_text_func
= xcoff_next_symbol_text
;
2235 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2236 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2238 while (ssymnum
< nsyms
)
2244 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2245 sclass
= symbol
.n_sclass
;
2252 /* The CSECT auxent--always the last auxent. */
2253 union internal_auxent csect_aux
;
2254 unsigned int symnum_before
= ssymnum
;
2256 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2258 if (symbol
.n_numaux
> 1)
2260 bfd_coff_swap_aux_in
2262 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2265 symbol
.n_numaux
- 1,
2270 csect_aux
= main_aux
[0];
2272 /* If symbol name starts with ".$" or "$", ignore it. */
2273 if (namestring
[0] == '$'
2274 || (namestring
[0] == '.' && namestring
[1] == '$'))
2277 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2280 switch (csect_aux
.x_csect
.x_smclas
)
2283 if (last_csect_name
)
2285 /* If no misc. function recorded in the last
2286 seen csect, enter it as a function. This
2287 will take care of functions like strcmp()
2290 if (!misc_func_recorded
)
2292 record_minimal_symbol
2293 (last_csect_name
, last_csect_val
,
2294 mst_text
, last_csect_sec
, objfile
);
2295 misc_func_recorded
= 1;
2300 /* We have to allocate one psymtab for
2301 each program csect, because their text
2302 sections need not be adjacent. */
2304 (objfile
, pst
, psymtab_include_list
,
2305 includes_used
, symnum_before
, dependency_list
,
2306 dependencies_used
, textlow_not_set
);
2308 dependencies_used
= 0;
2309 /* Give all psymtabs for this source file the same
2311 pst
= xcoff_start_psymtab
2315 objfile
->global_psymbols
.next
,
2316 objfile
->static_psymbols
.next
);
2319 /* Activate the misc_func_recorded mechanism for
2320 compiler- and linker-generated CSECTs like ".strcmp"
2322 if (namestring
&& (namestring
[0] == '.'
2323 || namestring
[0] == '@'))
2325 last_csect_name
= namestring
;
2326 last_csect_val
= symbol
.n_value
;
2327 last_csect_sec
= symbol
.n_scnum
;
2332 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2334 if (highval
> pst
->texthigh
)
2335 pst
->texthigh
= highval
;
2336 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2337 pst
->textlow
= symbol
.n_value
;
2339 misc_func_recorded
= 0;
2344 /* Data variables are recorded in the minimal symbol
2345 table, except for section symbols. */
2346 if (*namestring
!= '.')
2347 record_minimal_symbol
2348 (namestring
, symbol
.n_value
,
2349 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2350 symbol
.n_scnum
, objfile
);
2355 warning (_("More than one XMC_TC0 symbol found."));
2356 toc_offset
= symbol
.n_value
;
2358 /* Make TOC offset relative to start address of
2360 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2362 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2366 /* These symbols tell us where the TOC entry for a
2367 variable is, not the variable itself. */
2376 switch (csect_aux
.x_csect
.x_smclas
)
2379 /* A function entry point. */
2381 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2382 first_fun_line_offset
=
2383 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2385 record_minimal_symbol
2386 (namestring
, symbol
.n_value
,
2387 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2388 symbol
.n_scnum
, objfile
);
2389 misc_func_recorded
= 1;
2393 /* shared library function trampoline code entry
2396 /* record trampoline code entries as
2397 mst_solib_trampoline symbol. When we lookup mst
2398 symbols, we will choose mst_text over
2399 mst_solib_trampoline. */
2400 record_minimal_symbol
2401 (namestring
, symbol
.n_value
,
2402 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2403 misc_func_recorded
= 1;
2407 /* The symbols often have the same names as
2408 debug symbols for functions, and confuse
2414 /* xlc puts each variable in a separate csect,
2415 so we get an XTY_SD for each variable. But
2416 gcc puts several variables in a csect, so
2417 that each variable only gets an XTY_LD. We
2418 still need to record them. This will
2419 typically be XMC_RW; I suspect XMC_RO and
2420 XMC_BS might be possible too. */
2421 if (*namestring
!= '.')
2422 record_minimal_symbol
2423 (namestring
, symbol
.n_value
,
2424 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2425 symbol
.n_scnum
, objfile
);
2431 switch (csect_aux
.x_csect
.x_smclas
)
2435 /* Common variables are recorded in the minimal symbol
2436 table, except for section symbols. */
2437 if (*namestring
!= '.')
2438 record_minimal_symbol
2439 (namestring
, symbol
.n_value
,
2440 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2441 symbol
.n_scnum
, objfile
);
2453 unsigned int symnum_before
;
2455 symnum_before
= ssymnum
;
2456 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2459 /* See if the last csect needs to be recorded. */
2461 if (last_csect_name
&& !misc_func_recorded
)
2463 /* If no misc. function recorded in the last seen csect, enter
2464 it as a function. This will take care of functions like
2465 strcmp() compiled by xlc. */
2467 record_minimal_symbol (last_csect_name
, last_csect_val
,
2468 mst_text
, last_csect_sec
, objfile
);
2469 misc_func_recorded
= 1;
2474 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2475 includes_used
, symnum_before
,
2476 dependency_list
, dependencies_used
,
2479 dependencies_used
= 0;
2481 first_fun_line_offset
= 0;
2483 /* XCOFF, according to the AIX 3.2 documentation, puts the
2484 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2485 do things the standard COFF way and put it in the auxent.
2486 We use the auxent if the symbol is ".file" and an auxent
2487 exists, otherwise use the symbol itself. */
2488 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2490 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2493 filestring
= namestring
;
2495 pst
= xcoff_start_psymtab (objfile
,
2498 objfile
->global_psymbols
.next
,
2499 objfile
->static_psymbols
.next
);
2500 last_csect_name
= NULL
;
2506 complaint (&symfile_complaints
,
2507 _("Storage class %d not recognized during scan"),
2512 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2513 to handle only the C_FUN and C_EXT. */
2528 /* C_EINCL means we are switching back to the main file. But there
2529 is no reason to care; the only thing we want to know about
2530 includes is the names of all the included (.h) files. */
2535 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2539 /* I don't think the name of the common block (as opposed to the
2540 variables within it) is something which is user visible
2548 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2549 so C_LSYM would appear to be only for locals. */
2555 /* We probably could save a few instructions by assuming that
2556 C_LSYM, C_PSYM, etc., never have auxents. */
2557 int naux1
= symbol
.n_numaux
+ 1;
2560 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2566 /* Mark down an include file in the current psymtab. */
2567 enum language tmp_language
;
2569 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2572 tmp_language
= deduce_language_from_filename (namestring
);
2574 /* Only change the psymtab's language if we've learned
2575 something useful (eg. tmp_language is not language_unknown).
2576 In addition, to match what start_subfile does, never change
2578 if (tmp_language
!= language_unknown
2579 && (tmp_language
!= language_c
2580 || psymtab_language
!= language_cplus
))
2581 psymtab_language
= tmp_language
;
2583 /* In C++, one may expect the same filename to come round many
2584 times, when code is coming alternately from the main file
2585 and from inline functions in other files. So I check to see
2586 if this is a file we've seen before -- either the main
2587 source file, or a previously included file.
2589 This seems to be a lot of time to be spending on N_SOL, but
2590 things like "break c-exp.y:435" need to work (I
2591 suppose the psymtab_include_list could be hashed or put
2592 in a binary tree, if profiling shows this is a major hog). */
2593 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2599 for (i
= 0; i
< includes_used
; i
++)
2600 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2608 psymtab_include_list
[includes_used
++] = namestring
;
2609 if (includes_used
>= includes_allocated
)
2611 const char **orig
= psymtab_include_list
;
2613 psymtab_include_list
= (const char **)
2614 alloca ((includes_allocated
*= 2) *
2615 sizeof (const char *));
2616 memcpy (psymtab_include_list
, orig
,
2617 includes_used
* sizeof (const char *));
2622 /* The value of the C_FUN is not the address of the function (it
2623 appears to be the address before linking), but as long as it
2624 is smaller than the actual address, then find_pc_partial_function
2625 will use the minimal symbols instead. I hope. */
2634 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2637 p
= strchr (namestring
, ':');
2639 continue; /* Not a debugging symbol. */
2641 /* Main processing section for debugging symbols which
2642 the initial read through the symbol tables needs to worry
2643 about. If we reach this point, the symbol which we are
2644 considering is definitely one we are interested in.
2645 p must also contain the (valid) index into the namestring
2646 which indicates the debugging type symbol. */
2651 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2652 SECT_OFF_DATA (objfile
));
2654 if (gdbarch_static_transform_name_p (gdbarch
))
2655 namestring
= gdbarch_static_transform_name
2656 (gdbarch
, namestring
);
2658 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2659 VAR_DOMAIN
, LOC_STATIC
,
2660 &objfile
->static_psymbols
,
2662 psymtab_language
, objfile
);
2666 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2667 SECT_OFF_DATA (objfile
));
2668 /* The addresses in these entries are reported to be
2669 wrong. See the code that reads 'G's for symtabs. */
2670 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2671 VAR_DOMAIN
, LOC_STATIC
,
2672 &objfile
->global_psymbols
,
2674 psymtab_language
, objfile
);
2678 /* When a 'T' entry is defining an anonymous enum, it
2679 may have a name which is the empty string, or a
2680 single space. Since they're not really defining a
2681 symbol, those shouldn't go in the partial symbol
2682 table. We do pick up the elements of such enums at
2683 'check_enum:', below. */
2684 if (p
>= namestring
+ 2
2685 || (p
== namestring
+ 1
2686 && namestring
[0] != ' '))
2688 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2689 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2690 &objfile
->static_psymbols
,
2691 0, psymtab_language
, objfile
);
2694 /* Also a typedef with the same name. */
2695 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2696 VAR_DOMAIN
, LOC_TYPEDEF
,
2697 &objfile
->static_psymbols
,
2698 0, psymtab_language
, objfile
);
2705 if (p
!= namestring
) /* a name is there, not just :T... */
2707 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2708 VAR_DOMAIN
, LOC_TYPEDEF
,
2709 &objfile
->static_psymbols
,
2710 0, psymtab_language
, objfile
);
2713 /* If this is an enumerated type, we need to
2714 add all the enum constants to the partial symbol
2715 table. This does not cover enums without names, e.g.
2716 "enum {a, b} c;" in C, but fortunately those are
2717 rare. There is no way for GDB to find those from the
2718 enum type without spending too much time on it. Thus
2719 to solve this problem, the compiler needs to put out the
2720 enum in a nameless type. GCC2 does this. */
2722 /* We are looking for something of the form
2723 <name> ":" ("t" | "T") [<number> "="] "e"
2724 {<constant> ":" <value> ","} ";". */
2726 /* Skip over the colon and the 't' or 'T'. */
2728 /* This type may be given a number. Also, numbers can come
2729 in pairs like (0,26). Skip over it. */
2730 while ((*p
>= '0' && *p
<= '9')
2731 || *p
== '(' || *p
== ',' || *p
== ')'
2737 /* The aix4 compiler emits extra crud before the
2741 /* Skip over the type (?). */
2745 /* Skip over the colon. */
2749 /* We have found an enumerated type. */
2750 /* According to comments in read_enum_type
2751 a comma could end it instead of a semicolon.
2752 I don't know where that happens.
2754 while (*p
&& *p
!= ';' && *p
!= ',')
2758 /* Check for and handle cretinous dbx symbol name
2760 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2761 p
= next_symbol_text (objfile
);
2763 /* Point to the character after the name
2764 of the enum constant. */
2765 for (q
= p
; *q
&& *q
!= ':'; q
++)
2767 /* Note that the value doesn't matter for
2768 enum constants in psymtabs, just in symtabs. */
2769 add_psymbol_to_list (p
, q
- p
, 1,
2770 VAR_DOMAIN
, LOC_CONST
,
2771 &objfile
->static_psymbols
,
2772 0, psymtab_language
, objfile
);
2773 /* Point past the name. */
2775 /* Skip over the value. */
2776 while (*p
&& *p
!= ',')
2778 /* Advance past the comma. */
2786 /* Constant, e.g. from "const" in Pascal. */
2787 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2788 VAR_DOMAIN
, LOC_CONST
,
2789 &objfile
->static_psymbols
,
2790 0, psymtab_language
, objfile
);
2796 int name_len
= p
- namestring
;
2797 char *name
= (char *) xmalloc (name_len
+ 1);
2799 memcpy (name
, namestring
, name_len
);
2800 name
[name_len
] = '\0';
2801 function_outside_compilation_unit_complaint (name
);
2804 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2805 SECT_OFF_TEXT (objfile
));
2806 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2807 VAR_DOMAIN
, LOC_BLOCK
,
2808 &objfile
->static_psymbols
,
2810 psymtab_language
, objfile
);
2813 /* Global functions were ignored here, but now they
2814 are put into the global psymtab like one would expect.
2815 They're also in the minimal symbol table. */
2819 int name_len
= p
- namestring
;
2820 char *name
= (char *) xmalloc (name_len
+ 1);
2822 memcpy (name
, namestring
, name_len
);
2823 name
[name_len
] = '\0';
2824 function_outside_compilation_unit_complaint (name
);
2828 /* We need only the minimal symbols for these
2829 loader-generated definitions. Keeping the global
2830 symbols leads to "in psymbols but not in symbols"
2832 if (startswith (namestring
, "@FIX"))
2835 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2836 SECT_OFF_TEXT (objfile
));
2837 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2838 VAR_DOMAIN
, LOC_BLOCK
,
2839 &objfile
->global_psymbols
,
2841 psymtab_language
, objfile
);
2844 /* Two things show up here (hopefully); static symbols of
2845 local scope (static used inside braces) or extensions
2846 of structure symbols. We can ignore both. */
2860 case '#': /* For symbol identification (used in
2865 /* It is a C++ nested symbol. We don't need to record it
2866 (I don't think); if we try to look up foo::bar::baz,
2867 then symbols for the symtab containing foo should get
2868 read in, I think. */
2869 /* Someone says sun cc puts out symbols like
2870 /foo/baz/maclib::/usr/local/bin/maclib,
2871 which would get here with a symbol type of ':'. */
2875 /* Unexpected symbol descriptor. The second and
2876 subsequent stabs of a continued stab can show up
2877 here. The question is whether they ever can mimic
2878 a normal stab--it would be nice if not, since we
2879 certainly don't want to spend the time searching to
2880 the end of every string looking for a
2883 complaint (&symfile_complaints
,
2884 _("unknown symbol descriptor `%c'"), p
[1]);
2886 /* Ignore it; perhaps it is an extension that we don't
2896 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2897 ssymnum
, dependency_list
,
2898 dependencies_used
, textlow_not_set
);
2901 /* Record the toc offset value of this symbol table into objfile
2902 structure. If no XMC_TC0 is found, toc_offset should be zero.
2903 Another place to obtain this information would be file auxiliary
2906 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2909 /* Return the toc offset value for a given objfile. */
2912 xcoff_get_toc_offset (struct objfile
*objfile
)
2915 return XCOFF_DATA (objfile
)->toc_offset
;
2919 /* Scan and build partial symbols for a symbol file.
2920 We have been initialized by a call to dbx_symfile_init, which
2921 put all the relevant info into a "struct dbx_symfile_info",
2922 hung off the objfile structure.
2924 SECTION_OFFSETS contains offsets relative to which the symbols in the
2925 various sections are (depending where the sections were actually
2929 xcoff_initial_scan (struct objfile
*objfile
, int symfile_flags
)
2933 struct cleanup
*back_to
;
2934 int num_symbols
; /* # of symbols */
2935 file_ptr symtab_offset
; /* symbol table and */
2936 file_ptr stringtab_offset
; /* string table file offsets */
2937 struct coff_symfile_info
*info
;
2941 info
= XCOFF_DATA (objfile
);
2942 symfile_bfd
= abfd
= objfile
->obfd
;
2943 name
= objfile_name (objfile
);
2945 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2946 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2947 stringtab_offset
= symtab_offset
+
2948 num_symbols
* coff_data (abfd
)->local_symesz
;
2950 info
->min_lineno_offset
= 0;
2951 info
->max_lineno_offset
= 0;
2952 bfd_map_over_sections (abfd
, find_linenos
, info
);
2954 if (num_symbols
> 0)
2956 /* Read the string table. */
2957 init_stringtab (abfd
, stringtab_offset
, objfile
);
2959 /* Read the .debug section, if present. */
2961 struct bfd_section
*secp
;
2962 bfd_size_type length
;
2963 bfd_byte
*debugsec
= NULL
;
2965 secp
= bfd_get_section_by_name (abfd
, ".debug");
2968 length
= bfd_section_size (abfd
, secp
);
2972 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2975 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2977 error (_("Error reading .debug section of `%s': %s"),
2978 name
, bfd_errmsg (bfd_get_error ()));
2982 info
->debugsec
= (char *) debugsec
;
2986 /* Read the symbols. We keep them in core because we will want to
2987 access them randomly in read_symbol*. */
2988 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2990 error (_("Error reading symbols from %s: %s"),
2991 name
, bfd_errmsg (bfd_get_error ()));
2992 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2993 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2994 info
->symtbl_num_syms
= num_symbols
;
2996 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2998 perror_with_name (_("reading symbol table"));
3000 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3001 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3002 /* I'm not sure how how good num_symbols is; the rule of thumb in
3003 init_psymbol_list was developed for a.out. On the one hand,
3004 num_symbols includes auxents. On the other hand, it doesn't
3006 init_psymbol_list (objfile
, num_symbols
);
3008 free_pending_blocks ();
3009 back_to
= make_cleanup (really_free_pendings
, 0);
3011 init_minimal_symbol_collection ();
3012 make_cleanup_discard_minimal_symbols ();
3014 /* Now that the symbol table data of the executable file are all in core,
3015 process them and define symbols accordingly. */
3017 scan_xcoff_symtab (objfile
);
3019 /* Install any minimal symbols that have been collected as the current
3020 minimal symbols for this objfile. */
3022 install_minimal_symbols (objfile
);
3024 /* DWARF2 sections. */
3026 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3027 dwarf2_build_psymtabs (objfile
);
3029 dwarf2_build_frame_info (objfile
);
3031 do_cleanups (back_to
);
3035 xcoff_symfile_offsets (struct objfile
*objfile
,
3036 const struct section_addr_info
*addrs
)
3038 const char *first_section_name
;
3040 default_symfile_offsets (objfile
, addrs
);
3042 /* Oneof the weird side-effects of default_symfile_offsets is that
3043 it sometimes sets some section indices to zero for sections that,
3044 in fact do not exist. See the body of default_symfile_offsets
3045 for more info on when that happens. Undo that, as this then allows
3046 us to test whether the associated section exists or not, and then
3047 access it quickly (without searching it again). */
3049 if (objfile
->num_sections
== 0)
3050 return; /* Is that even possible? Better safe than sorry. */
3053 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3055 if (objfile
->sect_index_text
== 0
3056 && strcmp (first_section_name
, ".text") != 0)
3057 objfile
->sect_index_text
= -1;
3059 if (objfile
->sect_index_data
== 0
3060 && strcmp (first_section_name
, ".data") != 0)
3061 objfile
->sect_index_data
= -1;
3063 if (objfile
->sect_index_bss
== 0
3064 && strcmp (first_section_name
, ".bss") != 0)
3065 objfile
->sect_index_bss
= -1;
3067 if (objfile
->sect_index_rodata
== 0
3068 && strcmp (first_section_name
, ".rodata") != 0)
3069 objfile
->sect_index_rodata
= -1;
3072 /* Register our ability to parse symbols for xcoff BFD files. */
3074 static const struct sym_fns xcoff_sym_fns
=
3077 /* It is possible that coff and xcoff should be merged as
3078 they do have fundamental similarities (for example, the extra storage
3079 classes used for stabs could presumably be recognized in any COFF file).
3080 However, in addition to obvious things like all the csect hair, there are
3081 some subtler differences between xcoffread.c and coffread.c, notably
3082 the fact that coffread.c has no need to read in all the symbols, but
3083 xcoffread.c reads all the symbols and does in fact randomly access them
3084 (in C_BSTAT and line number processing). */
3086 xcoff_new_init
, /* init anything gbl to entire symtab */
3087 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3088 xcoff_initial_scan
, /* read a symbol file into symtab */
3089 NULL
, /* sym_read_psymbols */
3090 xcoff_symfile_finish
, /* finished with file, cleanup */
3091 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3092 default_symfile_segments
, /* Get segment information from a file. */
3093 aix_process_linenos
,
3094 default_symfile_relocate
, /* Relocate a debug section. */
3095 NULL
, /* sym_probe_fns */
3099 /* Same as xcoff_get_n_import_files, but for core files. */
3102 xcoff_get_core_n_import_files (bfd
*abfd
)
3104 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3106 file_ptr offset
= 0;
3110 return -1; /* Not a core file. */
3112 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3118 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3120 next
= bfd_get_32 (abfd
, buf
);
3122 break; /* This is the last entry. */
3126 /* Return the number of entries, excluding the first one, which is
3127 the path to the executable that produced this core file. */
3128 return n_entries
- 1;
3131 /* Return the number of import files (shared libraries) that the given
3132 BFD depends on. Return -1 if this number could not be computed. */
3135 xcoff_get_n_import_files (bfd
*abfd
)
3137 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3141 /* If the ".loader" section does not exist, the objfile is probably
3142 not an executable. Might be a core file... */
3144 return xcoff_get_core_n_import_files (abfd
);
3146 /* The number of entries in the Import Files Table is stored in
3147 field l_nimpid. This field is always at offset 16, and is
3148 always 4 bytes long. Read those 4 bytes. */
3150 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3152 l_nimpid
= bfd_get_32 (abfd
, buf
);
3154 /* By convention, the first entry is the default LIBPATH value
3155 to be used by the system loader, so it does not count towards
3156 the number of import files. */
3157 return l_nimpid
- 1;
3160 /* Free the per-objfile xcoff data. */
3163 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3168 /* Provide a prototype to silence -Wmissing-prototypes. */
3169 extern initialize_file_ftype _initialize_xcoffread
;
3172 _initialize_xcoffread (void)
3174 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3176 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,