1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2013 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 #include "gdb_string.h"
29 #include <sys/param.h>
30 #ifdef HAVE_SYS_FILE_H
35 #include "coff/internal.h"
36 #include "libcoff.h" /* FIXME, internal data from BFD */
37 #include "coff/xcoff.h"
39 #include "coff/rs6000.h"
40 #include "xcoffread.h"
44 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
48 #include "stabsread.h"
49 #include "expression.h"
50 #include "complaints.h"
53 #include "gdb-stabs.h"
55 /* For interface with stabsread.c. */
56 #include "aout/stab_gnu.h"
59 /* Key for XCOFF-associated data. */
61 static const struct objfile_data
*xcoff_objfile_data_key
;
63 /* We put a pointer to this structure in the read_symtab_private field
69 /* First symbol number for this file. */
73 /* Number of symbols in the section of the symbol table devoted to
74 this file's symbols (actually, the section bracketed may contain
75 more than just this file's symbols). If numsyms is 0, the only
76 reason for this thing's existence is the dependency list. Nothing
77 else will happen when it is read in. */
81 /* Position of the start of the line number information for this
83 unsigned int lineno_off
;
86 /* Remember what we deduced to be the source language of this psymtab. */
88 static enum language psymtab_language
= language_unknown
;
91 /* Simplified internal version of coff symbol table information. */
96 int c_symnum
; /* Symbol number of this entry. */
97 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
99 unsigned char c_sclass
;
104 /* Last function's saved coff symbol `cs'. */
106 static struct coff_symbol fcn_cs_saved
;
108 static bfd
*symfile_bfd
;
110 /* Core address of start and end of text of current source file.
111 This is calculated from the first function seen after a C_FILE
115 static CORE_ADDR cur_src_end_addr
;
117 /* Core address of the end of the first object file. */
119 static CORE_ADDR first_object_file_end
;
121 /* Initial symbol-table-debug-string vector length. */
123 #define INITIAL_STABVECTOR_LENGTH 40
125 /* Nonzero if within a function (so symbols should be local,
126 if nothing says specifically). */
130 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
131 there is any reason not to just use a #define, but might as well
132 ask BFD for the size and store it here, I guess. */
134 static unsigned local_symesz
;
136 struct coff_symfile_info
138 file_ptr min_lineno_offset
; /* Where in file lowest line#s are. */
139 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file. */
141 /* Pointer to the string table. */
144 /* Pointer to debug section. */
147 /* Pointer to the a.out symbol table. */
150 /* Number of symbols in symtbl. */
153 /* Offset in data section to TOC anchor. */
154 CORE_ADDR toc_offset
;
157 /* Convenience macro to access the per-objfile XCOFF data. */
159 #define XCOFF_DATA(objfile) \
160 ((struct coff_symfile_info *) objfile_data ((objfile), \
161 xcoff_objfile_data_key))
163 /* XCOFF names for dwarf sections. There is no compressed sections. */
165 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
167 { ".dwabrev", NULL
},
170 { NULL
, NULL
}, /* debug_macinfo */
171 { NULL
, NULL
}, /* debug_macro */
173 { ".dwrnges", NULL
},
174 { NULL
, NULL
}, /* debug_types */
175 { NULL
, NULL
}, /* debug_addr */
176 { ".dwframe", NULL
},
177 { NULL
, NULL
}, /* eh_frame */
178 { NULL
, NULL
}, /* gdb_index */
183 bf_notfound_complaint (void)
185 complaint (&symfile_complaints
,
186 _("line numbers off, `.bf' symbol not found"));
190 ef_complaint (int arg1
)
192 complaint (&symfile_complaints
,
193 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
197 eb_complaint (int arg1
)
199 complaint (&symfile_complaints
,
200 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
203 static void xcoff_initial_scan (struct objfile
*, int);
205 static void scan_xcoff_symtab (struct objfile
*);
207 static char *xcoff_next_symbol_text (struct objfile
*);
209 static void record_include_begin (struct coff_symbol
*);
212 enter_line_range (struct subfile
*, unsigned, unsigned,
213 CORE_ADDR
, CORE_ADDR
, unsigned *);
215 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
217 static void xcoff_symfile_init (struct objfile
*);
219 static void xcoff_new_init (struct objfile
*);
221 static void xcoff_symfile_finish (struct objfile
*);
223 static void xcoff_symfile_offsets (struct objfile
*,
224 struct section_addr_info
*addrs
);
226 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
228 static void read_symbol (struct internal_syment
*, int);
230 static int read_symbol_lineno (int);
232 static CORE_ADDR
read_symbol_nvalue (int);
234 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
237 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
240 static void add_stab_to_list (char *, struct pending_stabs
**);
243 static int compare_lte (const void *, const void *);
245 static struct linetable
*arrange_linetable (struct linetable
*);
247 static void record_include_end (struct coff_symbol
*);
249 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
252 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
254 static int secnum_to_section (int, struct objfile
*);
255 static asection
*secnum_to_bfd_section (int, struct objfile
*);
257 struct find_targ_sec_arg
262 struct objfile
*objfile
;
265 static void find_targ_sec (bfd
*, asection
*, void *);
268 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
270 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
271 struct objfile
*objfile
= args
->objfile
;
273 if (sect
->target_index
== args
->targ_index
)
275 /* This is the section. Figure out what SECT_OFF_* code it is. */
276 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
277 *args
->resultp
= SECT_OFF_TEXT (objfile
);
278 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
279 *args
->resultp
= SECT_OFF_DATA (objfile
);
281 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
282 *args
->bfd_sect
= sect
;
286 /* Search all BFD sections for the section whose target_index is
287 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
288 associated index in the objfile's section_offset table is also
291 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
292 is set to the text section's number. */
295 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
296 asection
**bfd_sect
, int *secnum
)
298 struct find_targ_sec_arg args
;
300 args
.targ_index
= n_scnum
;
301 args
.resultp
= secnum
;
302 args
.bfd_sect
= bfd_sect
;
303 args
.objfile
= objfile
;
306 *secnum
= SECT_OFF_TEXT (objfile
);
308 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
311 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
314 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
319 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
323 /* Return the BFD section that N_SCNUM points to. */
326 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
331 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
335 /* add a given stab string into given stab vector. */
340 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
342 if (*stabvector
== NULL
)
344 *stabvector
= (struct pending_stabs
*)
345 xmalloc (sizeof (struct pending_stabs
) +
346 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
347 (*stabvector
)->count
= 0;
348 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
350 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
352 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
353 *stabvector
= (struct pending_stabs
*)
354 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
355 (*stabvector
)->length
* sizeof (char *));
357 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
362 /* Linenos are processed on a file-by-file basis.
366 1) xlc (IBM's native c compiler) postpones static function code
367 emission to the end of a compilation unit. This way it can
368 determine if those functions (statics) are needed or not, and
369 can do some garbage collection (I think). This makes line
370 numbers and corresponding addresses unordered, and we end up
371 with a line table like:
388 and that breaks gdb's binary search on line numbers, if the
389 above table is not sorted on line numbers. And that sort
390 should be on function based, since gcc can emit line numbers
393 10 0x100 - for the init/test part of a for stmt.
396 10 0x400 - for the increment part of a for stmt.
398 arrange_linetable() will do this sorting.
400 2) aix symbol table might look like:
402 c_file // beginning of a new file
403 .bi // beginning of include file
404 .ei // end of include file
408 basically, .bi/.ei pairs do not necessarily encapsulate
409 their scope. They need to be recorded, and processed later
410 on when we come the end of the compilation unit.
411 Include table (inclTable) and process_linenos() handle
417 /* compare line table entry addresses. */
420 compare_lte (const void *lte1p
, const void *lte2p
)
422 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
423 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
425 return lte1
->pc
- lte2
->pc
;
428 /* Given a line table with function entries are marked, arrange its
429 functions in ascending order and strip off function entry markers
430 and return it in a newly created table. If the old one is good
431 enough, return the old one. */
432 /* FIXME: I think all this stuff can be replaced by just passing
433 sort_linevec = 1 to end_symtab. */
435 static struct linetable
*
436 arrange_linetable (struct linetable
*oldLineTb
)
438 int ii
, jj
, newline
, /* new line count */
439 function_count
; /* # of functions */
441 struct linetable_entry
*fentry
; /* function entry vector */
442 int fentry_size
; /* # of function entries */
443 struct linetable
*newLineTb
; /* new line table */
445 #define NUM_OF_FUNCTIONS 20
447 fentry_size
= NUM_OF_FUNCTIONS
;
448 fentry
= (struct linetable_entry
*)
449 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
451 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
453 if (oldLineTb
->item
[ii
].line
== 0)
454 { /* Function entry found. */
455 if (function_count
>= fentry_size
)
456 { /* Make sure you have room. */
458 fentry
= (struct linetable_entry
*)
460 fentry_size
* sizeof (struct linetable_entry
));
462 fentry
[function_count
].line
= ii
;
463 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
468 if (function_count
== 0)
473 else if (function_count
> 1)
474 qsort (fentry
, function_count
,
475 sizeof (struct linetable_entry
), compare_lte
);
477 /* Allocate a new line table. */
478 newLineTb
= (struct linetable
*)
480 (sizeof (struct linetable
) +
481 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
483 /* If line table does not start with a function beginning, copy up until
487 if (oldLineTb
->item
[0].line
!= 0)
489 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
490 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
492 /* Now copy function lines one by one. */
494 for (ii
= 0; ii
< function_count
; ++ii
)
496 for (jj
= fentry
[ii
].line
+ 1;
497 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
499 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
502 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
506 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
507 following `IncludeChain'. At the end of each symtab (end_symtab),
508 we will determine if we should create additional symtab's to
509 represent if (the include files. */
512 typedef struct _inclTable
514 char *name
; /* include filename */
516 /* Offsets to the line table. end points to the last entry which is
517 part of this include file. */
520 struct subfile
*subfile
;
521 unsigned funStartLine
; /* Start line # of its function. */
525 #define INITIAL_INCLUDE_TABLE_LENGTH 20
526 static InclTable
*inclTable
; /* global include table */
527 static int inclIndx
; /* last entry to table */
528 static int inclLength
; /* table length */
529 static int inclDepth
; /* nested include depth */
531 static void allocate_include_entry (void);
534 record_include_begin (struct coff_symbol
*cs
)
538 /* In xcoff, we assume include files cannot be nested (not in .c files
539 of course, but in corresponding .s files.). */
541 /* This can happen with old versions of GCC.
542 GCC 2.3.3-930426 does not exhibit this on a test case which
543 a user said produced the message for him. */
544 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
548 allocate_include_entry ();
550 inclTable
[inclIndx
].name
= cs
->c_name
;
551 inclTable
[inclIndx
].begin
= cs
->c_value
;
555 record_include_end (struct coff_symbol
*cs
)
561 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
564 allocate_include_entry ();
566 pTbl
= &inclTable
[inclIndx
];
567 pTbl
->end
= cs
->c_value
;
574 allocate_include_entry (void)
576 if (inclTable
== NULL
)
578 inclTable
= (InclTable
*)
579 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
581 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
582 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
585 else if (inclIndx
>= inclLength
)
587 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
588 inclTable
= (InclTable
*)
589 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
590 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
591 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
595 /* Global variable to pass the psymtab down to all the routines involved
596 in psymtab to symtab processing. */
597 static struct partial_symtab
*this_symtab_psymtab
;
599 /* Objfile related to this_symtab_psymtab; set at the same time. */
600 static struct objfile
*this_symtab_objfile
;
602 /* given the start and end addresses of a compilation unit (or a csect,
603 at times) process its lines and create appropriate line vectors. */
606 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
610 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
612 /* subfile structure for the main compilation unit. */
613 struct subfile main_subfile
;
615 /* In the main source file, any time we see a function entry, we
616 reset this variable to function's absolute starting line number.
617 All the following line numbers in the function are relative to
618 this, and we record absolute line numbers in record_line(). */
620 unsigned int main_source_baseline
= 0;
625 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
627 goto return_after_cleanup
;
629 memset (&main_subfile
, '\0', sizeof (main_subfile
));
632 /* All source lines were in the main source file. None in include
635 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
636 &main_source_baseline
);
640 /* There was source with line numbers in include files. */
643 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
644 main_source_baseline
= 0;
646 for (ii
= 0; ii
< inclIndx
; ++ii
)
648 struct subfile
*tmpSubfile
;
650 /* If there is main file source before include file, enter it. */
651 if (offset
< inclTable
[ii
].begin
)
654 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
655 start
, 0, &main_source_baseline
);
658 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
660 /* The entry in the include table refers to the main source
661 file. Add the lines to the main subfile. */
663 main_source_baseline
= inclTable
[ii
].funStartLine
;
665 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
666 start
, 0, &main_source_baseline
);
667 inclTable
[ii
].subfile
= &main_subfile
;
671 /* Have a new subfile for the include file. */
673 tmpSubfile
= inclTable
[ii
].subfile
=
674 (struct subfile
*) xmalloc (sizeof (struct subfile
));
676 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
677 firstLine
= &(inclTable
[ii
].funStartLine
);
679 /* Enter include file's lines now. */
680 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
681 inclTable
[ii
].end
, start
, 0, firstLine
);
684 if (offset
<= inclTable
[ii
].end
)
685 offset
= inclTable
[ii
].end
+ linesz
;
688 /* All the include files' line have been processed at this point. Now,
689 enter remaining lines of the main file, if any left. */
690 if (offset
< max_offset
+ 1 - linesz
)
692 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
693 &main_source_baseline
);
697 /* Process main file's line numbers. */
698 if (main_subfile
.line_vector
)
700 struct linetable
*lineTb
, *lv
;
702 lv
= main_subfile
.line_vector
;
704 /* Line numbers are not necessarily ordered. xlc compilation will
705 put static function to the end. */
707 lineTb
= arrange_linetable (lv
);
710 current_subfile
->line_vector
= (struct linetable
*)
711 xrealloc (lv
, (sizeof (struct linetable
)
712 + lv
->nitems
* sizeof (struct linetable_entry
)));
717 current_subfile
->line_vector
= lineTb
;
720 current_subfile
->line_vector_length
=
721 current_subfile
->line_vector
->nitems
;
724 /* Now, process included files' line numbers. */
726 for (ii
= 0; ii
< inclIndx
; ++ii
)
728 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
729 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
732 struct linetable
*lineTb
, *lv
;
734 lv
= (inclTable
[ii
].subfile
)->line_vector
;
736 /* Line numbers are not necessarily ordered. xlc compilation will
737 put static function to the end. */
739 lineTb
= arrange_linetable (lv
);
743 /* For the same include file, we might want to have more than one
744 subfile. This happens if we have something like:
752 while foo.h including code in it. (stupid but possible)
753 Since start_subfile() looks at the name and uses an
754 existing one if finds, we need to provide a fake name and
758 start_subfile (inclTable
[ii
].name
, (char *) 0);
761 /* Pick a fake name that will produce the same results as this
762 one when passed to deduce_language_from_filename. Kludge on
764 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
766 if (fakename
== NULL
)
768 start_subfile (fakename
, (char *) 0);
769 xfree (current_subfile
->name
);
771 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
776 current_subfile
->line_vector
=
777 (struct linetable
*) xrealloc
778 (lv
, (sizeof (struct linetable
)
779 + lv
->nitems
* sizeof (struct linetable_entry
)));
785 current_subfile
->line_vector
= lineTb
;
788 current_subfile
->line_vector_length
=
789 current_subfile
->line_vector
->nitems
;
790 start_subfile (pop_subfile (), (char *) 0);
794 return_after_cleanup
:
796 /* We don't want to keep alloc/free'ing the global include file table. */
799 /* Start with a fresh subfile structure for the next file. */
800 memset (&main_subfile
, '\0', sizeof (struct subfile
));
804 aix_process_linenos (void)
806 /* There is no linenos to read if there are only dwarf info. */
807 if (this_symtab_psymtab
== NULL
)
810 /* Process line numbers and enter them into line vector. */
811 process_linenos (last_source_start_addr
, cur_src_end_addr
);
815 /* Enter a given range of lines into the line vector.
816 can be called in the following two ways:
817 enter_line_range (subfile, beginoffset, endoffset,
818 startaddr, 0, firstLine) or
819 enter_line_range (subfile, beginoffset, 0,
820 startaddr, endaddr, firstLine)
822 endoffset points to the last line table entry that we should pay
826 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
827 unsigned endoffset
, /* offsets to line table */
828 CORE_ADDR startaddr
, /* offsets to line table */
829 CORE_ADDR endaddr
, unsigned *firstLine
)
831 struct objfile
*objfile
= this_symtab_objfile
;
832 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
833 unsigned int curoffset
;
836 struct internal_lineno int_lnno
;
837 unsigned int limit_offset
;
841 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
843 curoffset
= beginoffset
;
844 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
848 if (endoffset
>= limit_offset
)
850 complaint (&symfile_complaints
,
851 _("Bad line table offset in C_EINCL directive"));
854 limit_offset
= endoffset
;
859 abfd
= objfile
->obfd
;
860 linesz
= coff_data (abfd
)->local_linesz
;
861 ext_lnno
= alloca (linesz
);
863 while (curoffset
<= limit_offset
)
865 bfd_seek (abfd
, curoffset
, SEEK_SET
);
866 bfd_bread (ext_lnno
, linesz
, abfd
);
867 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
869 /* Find the address this line represents. */
870 addr
= (int_lnno
.l_lnno
871 ? int_lnno
.l_addr
.l_paddr
872 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
873 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
875 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
878 if (int_lnno
.l_lnno
== 0)
880 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
881 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
885 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
886 gdbarch_addr_bits_remove (gdbarch
, addr
));
892 /* Save the vital information for use when closing off the current file.
893 NAME is the file name the symbols came from, START_ADDR is the first
894 text address for the file, and SIZE is the number of bytes of text. */
896 #define complete_symtab(name, start_addr) { \
897 set_last_source_file (name); \
898 last_source_start_addr = start_addr; \
902 /* Refill the symbol table input buffer
903 and set the variables that control fetching entries from it.
904 Reports an error if no data available.
905 This function can read past the end of the symbol table
906 (into the string table) but this does no harm. */
908 /* Create a new minimal symbol (using prim_record_minimal_symbol_and_info).
910 Creation of all new minimal symbols should go through this function
911 rather than calling the various prim_record_[...] functions in order
912 to make sure that all symbol addresses get properly relocated.
916 NAME - the symbol's name (but if NAME starts with a period, that
917 leading period is discarded).
918 ADDRESS - the symbol's address, prior to relocation. This function
919 relocates the address before recording the minimal symbol.
920 MS_TYPE - the symbol's type.
921 N_SCNUM - the symbol's XCOFF section number.
922 OBJFILE - the objfile associated with the minimal symbol. */
925 record_minimal_symbol (const char *name
, CORE_ADDR address
,
926 enum minimal_symbol_type ms_type
,
928 struct objfile
*objfile
)
930 int section
= secnum_to_section (n_scnum
, objfile
);
935 address
+= ANOFFSET (objfile
->section_offsets
, section
);
936 prim_record_minimal_symbol_and_info (name
, address
, ms_type
,
937 secnum_to_section (n_scnum
, objfile
),
941 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
942 nested. At any given time, a symbol can only be in one static block.
943 This is the base address of current static block, zero if non exists. */
945 static int static_block_base
= 0;
947 /* Section number for the current static block. */
949 static int static_block_section
= -1;
951 /* true if space for symbol name has been allocated. */
953 static int symname_alloced
= 0;
955 /* Next symbol to read. Pointer into raw seething symbol table. */
957 static char *raw_symbol
;
959 /* This is the function which stabsread.c calls to get symbol
963 xcoff_next_symbol_text (struct objfile
*objfile
)
965 struct internal_syment symbol
;
968 /* FIXME: is this the same as the passed arg? */
969 if (this_symtab_objfile
)
970 objfile
= this_symtab_objfile
;
972 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
975 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
977 /* Return something which points to '\0' and hope the symbol reading
978 code does something reasonable. */
981 else if (symbol
.n_sclass
& 0x80)
983 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
984 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
989 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
991 /* Return something which points to '\0' and hope the symbol reading
992 code does something reasonable. */
998 /* Read symbols for a given partial symbol table. */
1001 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1003 bfd
*abfd
= objfile
->obfd
;
1004 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1005 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1006 char *strtbl
= xcoff
->strtbl
;
1007 char *debugsec
= xcoff
->debugsec
;
1008 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1010 struct internal_syment symbol
[1];
1011 union internal_auxent main_aux
;
1012 struct coff_symbol cs
[1];
1013 CORE_ADDR file_start_addr
= 0;
1014 CORE_ADDR file_end_addr
= 0;
1016 int next_file_symnum
= -1;
1017 unsigned int max_symnum
;
1018 int just_started
= 1;
1020 int fcn_start_addr
= 0;
1022 struct coff_symbol fcn_stab_saved
= { 0 };
1024 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1025 union internal_auxent fcn_aux_saved
= main_aux
;
1026 struct context_stack
*new;
1028 char *filestring
= " _start_ "; /* Name of the current file. */
1030 const char *last_csect_name
; /* Last seen csect's name. */
1032 this_symtab_psymtab
= pst
;
1033 this_symtab_objfile
= objfile
;
1035 /* Get the appropriate COFF "constants" related to the file we're
1037 local_symesz
= coff_data (abfd
)->local_symesz
;
1039 set_last_source_file (NULL
);
1040 last_csect_name
= 0;
1043 start_symtab (filestring
, (char *) NULL
, file_start_addr
);
1044 record_debugformat (debugfmt
);
1045 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1047 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1048 first_object_file_end
= 0;
1050 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1052 while (symnum
< max_symnum
)
1054 QUIT
; /* make this command interruptable. */
1056 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1057 /* read one symbol into `cs' structure. After processing the
1058 whole symbol table, only string table will be kept in memory,
1059 symbol table and debug section of xcoff will be freed. Thus
1060 we can mark symbols with names in string table as
1065 /* Swap and align the symbol into a reasonable C structure. */
1066 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1068 cs
->c_symnum
= symnum
;
1069 cs
->c_naux
= symbol
->n_numaux
;
1070 if (symbol
->n_zeroes
)
1072 symname_alloced
= 0;
1073 /* We must use the original, unswapped, name here so the name field
1074 pointed to by cs->c_name will persist throughout xcoffread. If
1075 we use the new field, it gets overwritten for each symbol. */
1076 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1077 /* If it's exactly E_SYMNMLEN characters long it isn't
1079 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1083 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
1084 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1085 p
[E_SYMNMLEN
] = '\0';
1087 symname_alloced
= 1;
1090 else if (symbol
->n_sclass
& 0x80)
1092 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1093 symname_alloced
= 0;
1097 /* in string table */
1098 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1099 symname_alloced
= 1;
1101 cs
->c_value
= symbol
->n_value
;
1102 cs
->c_sclass
= symbol
->n_sclass
;
1103 cs
->c_secnum
= symbol
->n_scnum
;
1104 cs
->c_type
= (unsigned) symbol
->n_type
;
1106 raw_symbol
+= local_symesz
;
1109 /* Save addr of first aux entry. */
1110 raw_auxptr
= raw_symbol
;
1112 /* Skip all the auxents associated with this symbol. */
1113 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1115 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1120 /* if symbol name starts with ".$" or "$", ignore it. */
1121 if (cs
->c_name
[0] == '$'
1122 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1125 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1127 if (get_last_source_file ())
1129 pst
->symtab
= end_symtab (cur_src_end_addr
, objfile
,
1130 SECT_OFF_TEXT (objfile
));
1135 start_symtab ("_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1136 record_debugformat (debugfmt
);
1137 cur_src_end_addr
= first_object_file_end
;
1138 /* Done with all files, everything from here on is globals. */
1141 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1144 /* Dealing with a symbol with a csect entry. */
1146 #define CSECT(PP) ((PP)->x_csect)
1147 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1148 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1149 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1150 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1152 /* Convert the auxent to something we can access. */
1153 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1154 0, cs
->c_naux
, &main_aux
);
1156 switch (CSECT_SMTYP (&main_aux
))
1160 /* Ignore all external references. */
1164 /* A section description. */
1166 switch (CSECT_SCLAS (&main_aux
))
1172 /* A program csect is seen. We have to allocate one
1173 symbol table for each program csect. Normally gdb
1174 prefers one symtab for each source file. In case
1175 of AIX, one source file might include more than one
1176 [PR] csect, and they don't have to be adjacent in
1177 terms of the space they occupy in memory. Thus, one
1178 single source file might get fragmented in the
1179 memory and gdb's file start and end address
1180 approach does not work! GCC (and I think xlc) seem
1181 to put all the code in the unnamed program csect. */
1183 if (last_csect_name
)
1185 complete_symtab (filestring
, file_start_addr
);
1186 cur_src_end_addr
= file_end_addr
;
1187 end_symtab (file_end_addr
, objfile
,
1188 SECT_OFF_TEXT (objfile
));
1191 /* Give all csects for this source file the same
1193 start_symtab (filestring
, NULL
, (CORE_ADDR
) 0);
1194 record_debugformat (debugfmt
);
1197 /* If this is the very first csect seen,
1198 basically `__start'. */
1201 first_object_file_end
1202 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1207 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1208 SECT_OFF_TEXT (objfile
));
1209 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1211 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1212 last_csect_name
= cs
->c_name
;
1216 /* All other symbols are put into the minimal symbol
1229 /* Ignore the symbol. */
1237 switch (CSECT_SCLAS (&main_aux
))
1240 /* a function entry point. */
1241 function_entry_point
:
1243 fcn_start_addr
= cs
->c_value
;
1245 /* save the function header info, which will be used
1246 when `.bf' is seen. */
1248 fcn_aux_saved
= main_aux
;
1252 /* shared library function trampoline code entry point. */
1256 /* The symbols often have the same names as debug symbols for
1257 functions, and confuse lookup_symbol. */
1261 /* xlc puts each variable in a separate csect, so we get
1262 an XTY_SD for each variable. But gcc puts several
1263 variables in a csect, so that each variable only gets
1264 an XTY_LD. This will typically be XMC_RW; I suspect
1265 XMC_RO and XMC_BS might be possible too.
1266 These variables are put in the minimal symbol table
1273 /* Common symbols are put into the minimal symbol table only. */
1281 /* If explicitly specified as a function, treat is as one. This check
1282 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1283 after the above CSECT check. */
1284 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1286 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1287 0, cs
->c_naux
, &main_aux
);
1288 goto function_entry_point
;
1291 switch (cs
->c_sclass
)
1295 /* c_value field contains symnum of next .file entry in table
1296 or symnum of first global after last .file. */
1298 next_file_symnum
= cs
->c_value
;
1300 /* Complete symbol table for last object file containing
1301 debugging information. */
1303 /* Whether or not there was a csect in the previous file, we
1304 have to call `end_stabs' and `start_stabs' to reset
1305 type_vector, line_vector, etc. structures. */
1307 complete_symtab (filestring
, file_start_addr
);
1308 cur_src_end_addr
= file_end_addr
;
1309 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1312 /* XCOFF, according to the AIX 3.2 documentation, puts the
1313 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1314 do things the standard COFF way and put it in the auxent.
1315 We use the auxent if the symbol is ".file" and an auxent
1316 exists, otherwise use the symbol itself. Simple
1318 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1320 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1321 0, cs
->c_naux
, &main_aux
);
1322 filestring
= coff_getfilename (&main_aux
, objfile
);
1325 filestring
= cs
->c_name
;
1328 start_symtab (filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1329 record_debugformat (debugfmt
);
1330 last_csect_name
= 0;
1332 /* reset file start and end addresses. A compilation unit
1333 with no text (only data) should have zero file
1335 file_start_addr
= file_end_addr
= 0;
1339 fcn_stab_saved
= *cs
;
1343 if (strcmp (cs
->c_name
, ".bf") == 0)
1345 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1346 SECT_OFF_TEXT (objfile
));
1348 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1349 0, cs
->c_naux
, &main_aux
);
1351 within_function
= 1;
1353 new = push_context (0, fcn_start_addr
+ off
);
1355 new->name
= define_symbol
1356 (fcn_cs_saved
.c_value
+ off
,
1357 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1358 if (new->name
!= NULL
)
1359 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT (objfile
);
1361 else if (strcmp (cs
->c_name
, ".ef") == 0)
1363 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1364 0, cs
->c_naux
, &main_aux
);
1366 /* The value of .ef is the address of epilogue code;
1367 not useful for gdb. */
1368 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1369 contains number of lines to '}' */
1371 if (context_stack_depth
<= 0)
1372 { /* We attempted to pop an empty context stack. */
1373 ef_complaint (cs
->c_symnum
);
1374 within_function
= 0;
1377 new = pop_context ();
1378 /* Stack must be empty now. */
1379 if (context_stack_depth
> 0 || new == NULL
)
1381 ef_complaint (cs
->c_symnum
);
1382 within_function
= 0;
1386 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1388 (fcn_cs_saved
.c_value
1389 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1390 + ANOFFSET (objfile
->section_offsets
,
1391 SECT_OFF_TEXT (objfile
))),
1393 within_function
= 0;
1398 /* Begin static block. */
1400 struct internal_syment symbol
;
1402 read_symbol (&symbol
, cs
->c_value
);
1403 static_block_base
= symbol
.n_value
;
1404 static_block_section
=
1405 secnum_to_section (symbol
.n_scnum
, objfile
);
1410 /* End of static block. */
1411 static_block_base
= 0;
1412 static_block_section
= -1;
1423 complaint (&symfile_complaints
,
1424 _("Unrecognized storage class %d."),
1439 /* beginning of include file */
1440 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1441 order. Thus, when wee see them, we might not know enough info
1442 to process them. Thus, we'll be saving them into a table
1443 (inclTable) and postpone their processing. */
1445 record_include_begin (cs
);
1449 /* End of include file. */
1450 /* See the comment after case C_BINCL. */
1451 record_include_end (cs
);
1455 if (strcmp (cs
->c_name
, ".bb") == 0)
1458 new = push_context (depth
,
1460 + ANOFFSET (objfile
->section_offsets
,
1461 SECT_OFF_TEXT (objfile
))));
1463 else if (strcmp (cs
->c_name
, ".eb") == 0)
1465 if (context_stack_depth
<= 0)
1466 { /* We attempted to pop an empty context stack. */
1467 eb_complaint (cs
->c_symnum
);
1470 new = pop_context ();
1471 if (depth
-- != new->depth
)
1473 eb_complaint (cs
->c_symnum
);
1476 if (local_symbols
&& context_stack_depth
> 0)
1478 /* Make a block for the local symbols within. */
1479 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1482 + ANOFFSET (objfile
->section_offsets
,
1483 SECT_OFF_TEXT (objfile
))),
1486 local_symbols
= new->locals
;
1491 process_xcoff_symbol (cs
, objfile
);
1496 if (get_last_source_file ())
1500 complete_symtab (filestring
, file_start_addr
);
1501 cur_src_end_addr
= file_end_addr
;
1502 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1503 /* When reading symbols for the last C_FILE of the objfile, try
1504 to make sure that we set pst->symtab to the symtab for the
1505 file, not to the _globals_ symtab. I'm not sure whether this
1506 actually works right or when/if it comes up. */
1507 if (pst
->symtab
== NULL
)
1513 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1514 (SYMBOL2) = (struct symbol *) \
1515 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1516 *(SYMBOL2) = *(SYMBOL1);
1519 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1520 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1521 (NAME), strlen (NAME)))
1524 /* process one xcoff symbol. */
1526 static struct symbol
*
1527 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1529 struct symbol onesymbol
;
1530 struct symbol
*sym
= &onesymbol
;
1531 struct symbol
*sym2
= NULL
;
1537 if (cs
->c_secnum
< 0)
1539 /* The value is a register number, offset within a frame, etc.,
1540 and does not get relocated. */
1546 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1547 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1554 initialize_symbol (sym
);
1556 /* default assumptions */
1557 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1558 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1559 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1561 if (ISFCN (cs
->c_type
))
1563 /* At this point, we don't know the type of the function. This
1564 will be patched with the type from its stab entry later on in
1565 patch_block_stabs (), unless the file was compiled without -g. */
1567 SYMBOL_SET_LINKAGE_NAME (sym
, SYMNAME_ALLOC (name
, symname_alloced
));
1568 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1570 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1571 SYMBOL_DUP (sym
, sym2
);
1573 if (cs
->c_sclass
== C_EXT
)
1574 add_symbol_to_list (sym2
, &global_symbols
);
1575 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1576 add_symbol_to_list (sym2
, &file_symbols
);
1580 /* In case we can't figure out the type, provide default. */
1581 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1583 switch (cs
->c_sclass
)
1586 /* The values of functions and global symbols are now resolved
1587 via the global_sym_chain in stabsread.c. */
1589 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1590 add_stab_to_list (name
, &global_stabs
);
1592 add_stab_to_list (name
, &file_stabs
);
1596 add_stab_to_list (name
, &global_stabs
);
1601 common_block_start (cs
->c_name
, objfile
);
1605 common_block_end (objfile
);
1609 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1622 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1625 SYMBOL_SECTION (sym
) = sec
;
1632 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1633 all statics and we need to distinguish file-scope versus
1634 function-scope using within_function. We do this by
1635 changing the string we pass to define_symbol to use 'S'
1636 where we need to, which is not necessarily super-clean,
1637 but seems workable enough. */
1642 pp
= strchr (name
, ':');
1647 if (*pp
== 'V' && !within_function
)
1649 sym
= define_symbol ((cs
->c_value
1650 + ANOFFSET (objfile
->section_offsets
,
1651 static_block_section
)),
1652 cs
->c_name
, 0, 0, objfile
);
1655 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1656 SYMBOL_SECTION (sym
) = static_block_section
;
1665 /* Extract the file name from the aux entry of a C_FILE symbol.
1666 Result is in static storage and is only good for temporary use. */
1669 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1671 static char buffer
[BUFSIZ
];
1673 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1674 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1675 + aux_entry
->x_file
.x_n
.x_offset
));
1678 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1679 buffer
[FILNMLEN
] = '\0';
1684 /* Set *SYMBOL to symbol number symno in symtbl. */
1686 read_symbol (struct internal_syment
*symbol
, int symno
)
1688 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1689 int nsyms
= xcoff
->symtbl_num_syms
;
1690 char *stbl
= xcoff
->symtbl
;
1692 if (symno
< 0 || symno
>= nsyms
)
1694 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1695 symbol
->n_value
= 0;
1696 symbol
->n_scnum
= -1;
1699 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1700 stbl
+ (symno
* local_symesz
),
1704 /* Get value corresponding to symbol number symno in symtbl. */
1707 read_symbol_nvalue (int symno
)
1709 struct internal_syment symbol
[1];
1711 read_symbol (symbol
, symno
);
1712 return symbol
->n_value
;
1716 /* Find the address of the function corresponding to symno, where
1717 symno is the symbol pointed to by the linetable. */
1720 read_symbol_lineno (int symno
)
1722 struct objfile
*objfile
= this_symtab_objfile
;
1723 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1725 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1726 int nsyms
= info
->symtbl_num_syms
;
1727 char *stbl
= info
->symtbl
;
1728 char *strtbl
= info
->strtbl
;
1730 struct internal_syment symbol
[1];
1731 union internal_auxent main_aux
[1];
1735 bf_notfound_complaint ();
1739 /* Note that just searching for a short distance (e.g. 50 symbols)
1740 is not enough, at least in the following case.
1743 [many .stabx entries]
1744 [a few functions, referring to foo]
1748 What happens here is that the assembler moves the .stabx entries
1749 to right before the ".bf" for foo, but the symbol for "foo" is before
1750 all the stabx entries. See PR gdb/2222. */
1752 /* Maintaining a table of .bf entries might be preferable to this search.
1753 If I understand things correctly it would need to be done only for
1754 the duration of a single psymtab to symtab conversion. */
1755 while (symno
< nsyms
)
1757 bfd_coff_swap_sym_in (symfile_bfd
,
1758 stbl
+ (symno
* local_symesz
), symbol
);
1759 if (symbol
->n_sclass
== C_FCN
)
1761 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1763 if (strcmp (name
, ".bf") == 0)
1766 symno
+= symbol
->n_numaux
+ 1;
1769 bf_notfound_complaint ();
1773 /* Take aux entry and return its lineno. */
1775 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1776 symbol
->n_type
, symbol
->n_sclass
,
1777 0, symbol
->n_numaux
, main_aux
);
1779 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1782 /* Support for line number handling. */
1784 /* This function is called for every section; it finds the outer limits
1785 * of the line table (minimum and maximum file offset) so that the
1786 * mainline code can read the whole thing for efficiency.
1789 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1791 struct coff_symfile_info
*info
;
1793 file_ptr offset
, maxoff
;
1795 count
= asect
->lineno_count
;
1797 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1800 size
= count
* coff_data (abfd
)->local_linesz
;
1801 info
= (struct coff_symfile_info
*) vpinfo
;
1802 offset
= asect
->line_filepos
;
1803 maxoff
= offset
+ size
;
1805 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1806 info
->min_lineno_offset
= offset
;
1808 if (maxoff
> info
->max_lineno_offset
)
1809 info
->max_lineno_offset
= maxoff
;
1813 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1815 struct cleanup
*old_chain
;
1824 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1829 /* Read in all partial symtabs on which this one is dependent. */
1830 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1831 if (!pst
->dependencies
[i
]->readin
)
1833 /* Inform about additional files that need to be read in. */
1836 fputs_filtered (" ", gdb_stdout
);
1838 fputs_filtered ("and ", gdb_stdout
);
1840 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1841 wrap_here (""); /* Flush output */
1842 gdb_flush (gdb_stdout
);
1844 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1847 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1849 /* Init stuff necessary for reading in symbols. */
1852 old_chain
= make_cleanup (really_free_pendings
, 0);
1854 read_xcoff_symtab (objfile
, pst
);
1856 do_cleanups (old_chain
);
1862 /* Read in all of the symbols for a given psymtab for real.
1863 Be verbose about it if the user wants that. SELF is not NULL. */
1866 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1871 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1876 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1877 || self
->number_of_dependencies
)
1879 /* Print the message now, before reading the string table,
1880 to avoid disconcerting pauses. */
1883 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1884 gdb_flush (gdb_stdout
);
1887 next_symbol_text_func
= xcoff_next_symbol_text
;
1889 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1891 /* Match with global symbols. This only needs to be done once,
1892 after all of the symtabs and dependencies have been read in. */
1893 scan_file_globals (objfile
);
1895 /* Finish up the debug error message. */
1897 printf_filtered ("done.\n");
1902 xcoff_new_init (struct objfile
*objfile
)
1904 stabsread_new_init ();
1905 buildsym_new_init ();
1908 /* Do initialization in preparation for reading symbols from OBJFILE.
1910 We will only be called if this is an XCOFF or XCOFF-like file.
1911 BFD handles figuring out the format of the file, and code in symfile.c
1912 uses BFD's determination to vector to us. */
1915 xcoff_symfile_init (struct objfile
*objfile
)
1917 struct coff_symfile_info
*xcoff
;
1919 /* Allocate struct to keep track of the symfile. */
1920 xcoff
= XNEW (struct coff_symfile_info
);
1921 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1923 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1924 find this causes a significant slowdown in gdb then we could
1925 set it in the debug symbol readers only when necessary. */
1926 objfile
->flags
|= OBJF_REORDERED
;
1929 /* Perform any local cleanups required when we are done with a particular
1930 objfile. I.E, we are in the process of discarding all symbol information
1931 for an objfile, freeing up all memory held for it, and unlinking the
1932 objfile struct from the global list of known objfiles. */
1935 xcoff_symfile_finish (struct objfile
*objfile
)
1937 /* Start with a fresh include table for the next objfile. */
1943 inclIndx
= inclLength
= inclDepth
= 0;
1945 dwarf2_free_objfile (objfile
);
1950 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1954 unsigned char lengthbuf
[4];
1956 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1958 xcoff
->strtbl
= NULL
;
1960 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1961 error (_("cannot seek to string table in %s: %s"),
1962 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1964 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1965 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1967 /* If no string table is needed, then the file may end immediately
1968 after the symbols. Just return with `strtbl' set to NULL. */
1970 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1973 /* Allocate string table from objfile_obstack. We will need this table
1974 as long as we have its symbol table around. */
1976 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1977 xcoff
->strtbl
= strtbl
;
1979 /* Copy length buffer, the first byte is usually zero and is
1980 used for stabs with a name length of zero. */
1981 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1982 if (length
== sizeof lengthbuf
)
1985 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1987 if (val
!= length
- sizeof lengthbuf
)
1988 error (_("cannot read string table from %s: %s"),
1989 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1990 if (strtbl
[length
- 1] != '\0')
1991 error (_("bad symbol file: string table "
1992 "does not end with null character"));
1997 /* If we have not yet seen a function for this psymtab, this is 0. If we
1998 have seen one, it is the offset in the line numbers of the line numbers
2000 static unsigned int first_fun_line_offset
;
2002 /* Allocate and partially fill a partial symtab. It will be
2003 completely filled at the end of the symbol list.
2005 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2006 is the address relative to which its symbols are (incremental) or 0
2009 static struct partial_symtab
*
2010 xcoff_start_psymtab (struct objfile
*objfile
,
2011 const char *filename
, int first_symnum
,
2012 struct partial_symbol
**global_syms
,
2013 struct partial_symbol
**static_syms
)
2015 struct partial_symtab
*result
=
2016 start_psymtab_common (objfile
, objfile
->section_offsets
,
2018 /* We fill in textlow later. */
2020 global_syms
, static_syms
);
2022 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2023 sizeof (struct symloc
));
2024 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2025 result
->read_symtab
= xcoff_read_symtab
;
2027 /* Deduce the source language from the filename for this psymtab. */
2028 psymtab_language
= deduce_language_from_filename (filename
);
2033 /* Close off the current usage of PST.
2034 Returns PST, or NULL if the partial symtab was empty and thrown away.
2036 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2038 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2039 are the information for includes and dependencies. */
2041 static struct partial_symtab
*
2042 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2043 const char **include_list
, int num_includes
,
2044 int capping_symbol_number
,
2045 struct partial_symtab
**dependency_list
,
2046 int number_dependencies
, int textlow_not_set
)
2050 if (capping_symbol_number
!= -1)
2051 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2052 capping_symbol_number
2053 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2054 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2055 first_fun_line_offset
;
2056 first_fun_line_offset
= 0;
2057 pst
->n_global_syms
= objfile
->global_psymbols
.next
2058 - (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2059 pst
->n_static_syms
= objfile
->static_psymbols
.next
2060 - (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2062 pst
->number_of_dependencies
= number_dependencies
;
2063 if (number_dependencies
)
2065 pst
->dependencies
= (struct partial_symtab
**)
2066 obstack_alloc (&objfile
->objfile_obstack
,
2067 number_dependencies
* sizeof (struct partial_symtab
*));
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
->section_offsets
= pst
->section_offsets
;
2080 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2081 sizeof (struct symloc
));
2082 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2083 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2084 subpst
->textlow
= 0;
2085 subpst
->texthigh
= 0;
2087 /* We could save slight bits of space by only making one of these,
2088 shared by the entire set of include files. FIXME-someday. */
2089 subpst
->dependencies
= (struct partial_symtab
**)
2090 obstack_alloc (&objfile
->objfile_obstack
,
2091 sizeof (struct partial_symtab
*));
2092 subpst
->dependencies
[0] = pst
;
2093 subpst
->number_of_dependencies
= 1;
2095 subpst
->globals_offset
=
2096 subpst
->n_global_syms
=
2097 subpst
->statics_offset
=
2098 subpst
->n_static_syms
= 0;
2102 subpst
->read_symtab
= pst
->read_symtab
;
2105 sort_pst_symbols (objfile
, pst
);
2107 if (num_includes
== 0
2108 && number_dependencies
== 0
2109 && pst
->n_global_syms
== 0
2110 && pst
->n_static_syms
== 0)
2112 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2113 it is on the obstack, but we can forget to chain it on the list. */
2114 /* Empty psymtabs happen as a result of header files which don't have
2115 any symbols in them. There can be a lot of them. */
2117 discard_psymtab (objfile
, pst
);
2119 /* Indicate that psymtab was thrown away. */
2120 pst
= (struct partial_symtab
*) NULL
;
2125 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2126 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2127 the symbol and its auxents. */
2130 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2131 const char **name
, char **raw
, unsigned int *symnump
,
2132 struct objfile
*objfile
)
2134 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2135 if (symbol
->n_zeroes
)
2137 /* If it's exactly E_SYMNMLEN characters long it isn't
2139 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2141 /* FIXME: wastes memory for symbols which we don't end up putting
2142 into the minimal symbols. */
2145 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
2146 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2147 p
[E_SYMNMLEN
] = '\0';
2151 /* Point to the unswapped name as that persists as long as the
2153 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2155 else if (symbol
->n_sclass
& 0x80)
2157 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2161 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2164 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2165 if (symbol
->n_numaux
> 0)
2167 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2168 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2170 *symnump
+= symbol
->n_numaux
;
2171 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2176 function_outside_compilation_unit_complaint (const char *arg1
)
2178 complaint (&symfile_complaints
,
2179 _("function `%s' appears to be defined "
2180 "outside of all compilation units"),
2185 scan_xcoff_symtab (struct objfile
*objfile
)
2187 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2188 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2189 const char *filestring
= NULL
;
2191 const char *namestring
;
2192 int past_first_source_file
= 0;
2197 /* Current partial symtab */
2198 struct partial_symtab
*pst
;
2200 /* List of current psymtab's include files. */
2201 const char **psymtab_include_list
;
2202 int includes_allocated
;
2205 /* Index within current psymtab dependency list. */
2206 struct partial_symtab
**dependency_list
;
2207 int dependencies_used
, dependencies_allocated
;
2210 struct internal_syment symbol
;
2211 union internal_auxent main_aux
[5];
2212 unsigned int ssymnum
;
2214 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2215 CORE_ADDR last_csect_val
= 0;
2216 int last_csect_sec
= 0;
2217 int misc_func_recorded
= 0; /* true if any misc. function. */
2218 int textlow_not_set
= 1;
2220 pst
= (struct partial_symtab
*) 0;
2222 includes_allocated
= 30;
2224 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2225 sizeof (const char *));
2227 dependencies_allocated
= 30;
2228 dependencies_used
= 0;
2230 (struct partial_symtab
**) alloca (dependencies_allocated
*
2231 sizeof (struct partial_symtab
*));
2233 set_last_source_file (NULL
);
2235 abfd
= objfile
->obfd
;
2236 next_symbol_text_func
= xcoff_next_symbol_text
;
2238 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2239 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2241 while (ssymnum
< nsyms
)
2247 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2248 sclass
= symbol
.n_sclass
;
2255 /* The CSECT auxent--always the last auxent. */
2256 union internal_auxent csect_aux
;
2257 unsigned int symnum_before
= ssymnum
;
2259 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2261 if (symbol
.n_numaux
> 1)
2263 bfd_coff_swap_aux_in
2265 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2268 symbol
.n_numaux
- 1,
2273 csect_aux
= main_aux
[0];
2275 /* If symbol name starts with ".$" or "$", ignore it. */
2276 if (namestring
[0] == '$'
2277 || (namestring
[0] == '.' && namestring
[1] == '$'))
2280 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2283 switch (csect_aux
.x_csect
.x_smclas
)
2286 if (last_csect_name
)
2288 /* If no misc. function recorded in the last
2289 seen csect, enter it as a function. This
2290 will take care of functions like strcmp()
2293 if (!misc_func_recorded
)
2295 record_minimal_symbol
2296 (last_csect_name
, last_csect_val
,
2297 mst_text
, last_csect_sec
, objfile
);
2298 misc_func_recorded
= 1;
2303 /* We have to allocate one psymtab for
2304 each program csect, because their text
2305 sections need not be adjacent. */
2307 (objfile
, pst
, psymtab_include_list
,
2308 includes_used
, symnum_before
, dependency_list
,
2309 dependencies_used
, textlow_not_set
);
2311 dependencies_used
= 0;
2312 /* Give all psymtabs for this source file the same
2314 pst
= xcoff_start_psymtab
2318 objfile
->global_psymbols
.next
,
2319 objfile
->static_psymbols
.next
);
2322 /* Activate the misc_func_recorded mechanism for
2323 compiler- and linker-generated CSECTs like ".strcmp"
2325 if (namestring
&& (namestring
[0] == '.'
2326 || namestring
[0] == '@'))
2328 last_csect_name
= namestring
;
2329 last_csect_val
= symbol
.n_value
;
2330 last_csect_sec
= symbol
.n_scnum
;
2335 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2337 if (highval
> pst
->texthigh
)
2338 pst
->texthigh
= highval
;
2339 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2340 pst
->textlow
= symbol
.n_value
;
2342 misc_func_recorded
= 0;
2347 /* Data variables are recorded in the minimal symbol
2348 table, except for section symbols. */
2349 if (*namestring
!= '.')
2350 record_minimal_symbol
2351 (namestring
, symbol
.n_value
,
2352 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2353 symbol
.n_scnum
, objfile
);
2358 warning (_("More than one XMC_TC0 symbol found."));
2359 toc_offset
= symbol
.n_value
;
2361 /* Make TOC offset relative to start address of
2363 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2365 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2369 /* These symbols tell us where the TOC entry for a
2370 variable is, not the variable itself. */
2379 switch (csect_aux
.x_csect
.x_smclas
)
2382 /* A function entry point. */
2384 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2385 first_fun_line_offset
=
2386 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2388 record_minimal_symbol
2389 (namestring
, symbol
.n_value
,
2390 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2391 symbol
.n_scnum
, objfile
);
2392 misc_func_recorded
= 1;
2397 /* shared library function trampoline code entry
2400 /* record trampoline code entries as
2401 mst_solib_trampoline symbol. When we lookup mst
2402 symbols, we will choose mst_text over
2403 mst_solib_trampoline. */
2404 record_minimal_symbol
2405 (namestring
, symbol
.n_value
,
2406 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2407 misc_func_recorded
= 1;
2411 /* The symbols often have the same names as
2412 debug symbols for functions, and confuse
2418 /* xlc puts each variable in a separate csect,
2419 so we get an XTY_SD for each variable. But
2420 gcc puts several variables in a csect, so
2421 that each variable only gets an XTY_LD. We
2422 still need to record them. This will
2423 typically be XMC_RW; I suspect XMC_RO and
2424 XMC_BS might be possible too. */
2425 if (*namestring
!= '.')
2426 record_minimal_symbol
2427 (namestring
, symbol
.n_value
,
2428 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2429 symbol
.n_scnum
, objfile
);
2435 switch (csect_aux
.x_csect
.x_smclas
)
2439 /* Common variables are recorded in the minimal symbol
2440 table, except for section symbols. */
2441 if (*namestring
!= '.')
2442 record_minimal_symbol
2443 (namestring
, symbol
.n_value
,
2444 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2445 symbol
.n_scnum
, objfile
);
2457 unsigned int symnum_before
;
2459 symnum_before
= ssymnum
;
2460 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2463 /* See if the last csect needs to be recorded. */
2465 if (last_csect_name
&& !misc_func_recorded
)
2467 /* If no misc. function recorded in the last seen csect, enter
2468 it as a function. This will take care of functions like
2469 strcmp() compiled by xlc. */
2471 record_minimal_symbol (last_csect_name
, last_csect_val
,
2472 mst_text
, last_csect_sec
, objfile
);
2473 misc_func_recorded
= 1;
2478 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2479 includes_used
, symnum_before
,
2480 dependency_list
, dependencies_used
,
2483 dependencies_used
= 0;
2485 first_fun_line_offset
= 0;
2487 /* XCOFF, according to the AIX 3.2 documentation, puts the
2488 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2489 do things the standard COFF way and put it in the auxent.
2490 We use the auxent if the symbol is ".file" and an auxent
2491 exists, otherwise use the symbol itself. */
2492 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2494 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2497 filestring
= namestring
;
2499 pst
= xcoff_start_psymtab (objfile
,
2502 objfile
->global_psymbols
.next
,
2503 objfile
->static_psymbols
.next
);
2504 last_csect_name
= NULL
;
2510 complaint (&symfile_complaints
,
2511 _("Storage class %d not recognized during scan"),
2516 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2517 to handle only the C_FUN and C_EXT. */
2532 /* C_EINCL means we are switching back to the main file. But there
2533 is no reason to care; the only thing we want to know about
2534 includes is the names of all the included (.h) files. */
2539 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2543 /* I don't think the name of the common block (as opposed to the
2544 variables within it) is something which is user visible
2552 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2553 so C_LSYM would appear to be only for locals. */
2559 /* We probably could save a few instructions by assuming that
2560 C_LSYM, C_PSYM, etc., never have auxents. */
2561 int naux1
= symbol
.n_numaux
+ 1;
2564 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2570 /* Mark down an include file in the current psymtab. */
2571 enum language tmp_language
;
2573 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2576 tmp_language
= deduce_language_from_filename (namestring
);
2578 /* Only change the psymtab's language if we've learned
2579 something useful (eg. tmp_language is not language_unknown).
2580 In addition, to match what start_subfile does, never change
2582 if (tmp_language
!= language_unknown
2583 && (tmp_language
!= language_c
2584 || psymtab_language
!= language_cplus
))
2585 psymtab_language
= tmp_language
;
2587 /* In C++, one may expect the same filename to come round many
2588 times, when code is coming alternately from the main file
2589 and from inline functions in other files. So I check to see
2590 if this is a file we've seen before -- either the main
2591 source file, or a previously included file.
2593 This seems to be a lot of time to be spending on N_SOL, but
2594 things like "break c-exp.y:435" need to work (I
2595 suppose the psymtab_include_list could be hashed or put
2596 in a binary tree, if profiling shows this is a major hog). */
2597 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2603 for (i
= 0; i
< includes_used
; i
++)
2604 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2612 psymtab_include_list
[includes_used
++] = namestring
;
2613 if (includes_used
>= includes_allocated
)
2615 const char **orig
= psymtab_include_list
;
2617 psymtab_include_list
= (const char **)
2618 alloca ((includes_allocated
*= 2) *
2619 sizeof (const char *));
2620 memcpy (psymtab_include_list
, orig
,
2621 includes_used
* sizeof (const char *));
2626 /* The value of the C_FUN is not the address of the function (it
2627 appears to be the address before linking), but as long as it
2628 is smaller than the actual address, then find_pc_partial_function
2629 will use the minimal symbols instead. I hope. */
2638 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2641 p
= strchr (namestring
, ':');
2643 continue; /* Not a debugging symbol. */
2645 /* Main processing section for debugging symbols which
2646 the initial read through the symbol tables needs to worry
2647 about. If we reach this point, the symbol which we are
2648 considering is definitely one we are interested in.
2649 p must also contain the (valid) index into the namestring
2650 which indicates the debugging type symbol. */
2655 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2656 SECT_OFF_DATA (objfile
));
2658 if (gdbarch_static_transform_name_p (gdbarch
))
2659 namestring
= gdbarch_static_transform_name
2660 (gdbarch
, namestring
);
2662 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2663 VAR_DOMAIN
, LOC_STATIC
,
2664 &objfile
->static_psymbols
,
2666 psymtab_language
, objfile
);
2670 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2671 SECT_OFF_DATA (objfile
));
2672 /* The addresses in these entries are reported to be
2673 wrong. See the code that reads 'G's for symtabs. */
2674 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2675 VAR_DOMAIN
, LOC_STATIC
,
2676 &objfile
->global_psymbols
,
2678 psymtab_language
, objfile
);
2682 /* When a 'T' entry is defining an anonymous enum, it
2683 may have a name which is the empty string, or a
2684 single space. Since they're not really defining a
2685 symbol, those shouldn't go in the partial symbol
2686 table. We do pick up the elements of such enums at
2687 'check_enum:', below. */
2688 if (p
>= namestring
+ 2
2689 || (p
== namestring
+ 1
2690 && namestring
[0] != ' '))
2692 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2693 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2694 &objfile
->static_psymbols
,
2696 psymtab_language
, objfile
);
2699 /* Also a typedef with the same name. */
2700 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2701 VAR_DOMAIN
, LOC_TYPEDEF
,
2702 &objfile
->static_psymbols
,
2704 psymtab_language
, objfile
);
2711 if (p
!= namestring
) /* a name is there, not just :T... */
2713 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2714 VAR_DOMAIN
, LOC_TYPEDEF
,
2715 &objfile
->static_psymbols
,
2717 psymtab_language
, objfile
);
2720 /* If this is an enumerated type, we need to
2721 add all the enum constants to the partial symbol
2722 table. This does not cover enums without names, e.g.
2723 "enum {a, b} c;" in C, but fortunately those are
2724 rare. There is no way for GDB to find those from the
2725 enum type without spending too much time on it. Thus
2726 to solve this problem, the compiler needs to put out the
2727 enum in a nameless type. GCC2 does this. */
2729 /* We are looking for something of the form
2730 <name> ":" ("t" | "T") [<number> "="] "e"
2731 {<constant> ":" <value> ","} ";". */
2733 /* Skip over the colon and the 't' or 'T'. */
2735 /* This type may be given a number. Also, numbers can come
2736 in pairs like (0,26). Skip over it. */
2737 while ((*p
>= '0' && *p
<= '9')
2738 || *p
== '(' || *p
== ',' || *p
== ')'
2744 /* The aix4 compiler emits extra crud before the
2748 /* Skip over the type (?). */
2752 /* Skip over the colon. */
2756 /* We have found an enumerated type. */
2757 /* According to comments in read_enum_type
2758 a comma could end it instead of a semicolon.
2759 I don't know where that happens.
2761 while (*p
&& *p
!= ';' && *p
!= ',')
2765 /* Check for and handle cretinous dbx symbol name
2767 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2768 p
= next_symbol_text (objfile
);
2770 /* Point to the character after the name
2771 of the enum constant. */
2772 for (q
= p
; *q
&& *q
!= ':'; q
++)
2774 /* Note that the value doesn't matter for
2775 enum constants in psymtabs, just in symtabs. */
2776 add_psymbol_to_list (p
, q
- p
, 1,
2777 VAR_DOMAIN
, LOC_CONST
,
2778 &objfile
->static_psymbols
, 0,
2779 0, psymtab_language
, objfile
);
2780 /* Point past the name. */
2782 /* Skip over the value. */
2783 while (*p
&& *p
!= ',')
2785 /* Advance past the comma. */
2793 /* Constant, e.g. from "const" in Pascal. */
2794 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2795 VAR_DOMAIN
, LOC_CONST
,
2796 &objfile
->static_psymbols
, symbol
.n_value
,
2797 0, psymtab_language
, objfile
);
2803 int name_len
= p
- namestring
;
2804 char *name
= xmalloc (name_len
+ 1);
2806 memcpy (name
, namestring
, name_len
);
2807 name
[name_len
] = '\0';
2808 function_outside_compilation_unit_complaint (name
);
2811 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2812 SECT_OFF_TEXT (objfile
));
2813 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2814 VAR_DOMAIN
, LOC_BLOCK
,
2815 &objfile
->static_psymbols
,
2817 psymtab_language
, objfile
);
2820 /* Global functions were ignored here, but now they
2821 are put into the global psymtab like one would expect.
2822 They're also in the minimal symbol table. */
2826 int name_len
= p
- namestring
;
2827 char *name
= xmalloc (name_len
+ 1);
2829 memcpy (name
, namestring
, name_len
);
2830 name
[name_len
] = '\0';
2831 function_outside_compilation_unit_complaint (name
);
2835 /* We need only the minimal symbols for these
2836 loader-generated definitions. Keeping the global
2837 symbols leads to "in psymbols but not in symbols"
2839 if (strncmp (namestring
, "@FIX", 4) == 0)
2842 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2843 SECT_OFF_TEXT (objfile
));
2844 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2845 VAR_DOMAIN
, LOC_BLOCK
,
2846 &objfile
->global_psymbols
,
2848 psymtab_language
, objfile
);
2851 /* Two things show up here (hopefully); static symbols of
2852 local scope (static used inside braces) or extensions
2853 of structure symbols. We can ignore both. */
2867 case '#': /* For symbol identification (used in
2872 /* It is a C++ nested symbol. We don't need to record it
2873 (I don't think); if we try to look up foo::bar::baz,
2874 then symbols for the symtab containing foo should get
2875 read in, I think. */
2876 /* Someone says sun cc puts out symbols like
2877 /foo/baz/maclib::/usr/local/bin/maclib,
2878 which would get here with a symbol type of ':'. */
2882 /* Unexpected symbol descriptor. The second and
2883 subsequent stabs of a continued stab can show up
2884 here. The question is whether they ever can mimic
2885 a normal stab--it would be nice if not, since we
2886 certainly don't want to spend the time searching to
2887 the end of every string looking for a
2890 complaint (&symfile_complaints
,
2891 _("unknown symbol descriptor `%c'"), p
[1]);
2893 /* Ignore it; perhaps it is an extension that we don't
2903 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2904 ssymnum
, dependency_list
,
2905 dependencies_used
, textlow_not_set
);
2908 /* Record the toc offset value of this symbol table into objfile
2909 structure. If no XMC_TC0 is found, toc_offset should be zero.
2910 Another place to obtain this information would be file auxiliary
2913 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2916 /* Return the toc offset value for a given objfile. */
2919 xcoff_get_toc_offset (struct objfile
*objfile
)
2922 return XCOFF_DATA (objfile
)->toc_offset
;
2926 /* Scan and build partial symbols for a symbol file.
2927 We have been initialized by a call to dbx_symfile_init, which
2928 put all the relevant info into a "struct dbx_symfile_info",
2929 hung off the objfile structure.
2931 SECTION_OFFSETS contains offsets relative to which the symbols in the
2932 various sections are (depending where the sections were actually
2936 xcoff_initial_scan (struct objfile
*objfile
, int symfile_flags
)
2940 struct cleanup
*back_to
;
2941 int num_symbols
; /* # of symbols */
2942 file_ptr symtab_offset
; /* symbol table and */
2943 file_ptr stringtab_offset
; /* string table file offsets */
2944 struct coff_symfile_info
*info
;
2948 info
= XCOFF_DATA (objfile
);
2949 symfile_bfd
= abfd
= objfile
->obfd
;
2950 name
= objfile
->name
;
2952 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2953 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2954 stringtab_offset
= symtab_offset
+
2955 num_symbols
* coff_data (abfd
)->local_symesz
;
2957 info
->min_lineno_offset
= 0;
2958 info
->max_lineno_offset
= 0;
2959 bfd_map_over_sections (abfd
, find_linenos
, info
);
2961 if (num_symbols
> 0)
2963 /* Read the string table. */
2964 init_stringtab (abfd
, stringtab_offset
, objfile
);
2966 /* Read the .debug section, if present. */
2968 struct bfd_section
*secp
;
2969 bfd_size_type length
;
2970 bfd_byte
*debugsec
= NULL
;
2972 secp
= bfd_get_section_by_name (abfd
, ".debug");
2975 length
= bfd_section_size (abfd
, secp
);
2978 debugsec
= obstack_alloc (&objfile
->objfile_obstack
, length
);
2980 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2982 error (_("Error reading .debug section of `%s': %s"),
2983 name
, bfd_errmsg (bfd_get_error ()));
2987 info
->debugsec
= (char *) debugsec
;
2991 /* Read the symbols. We keep them in core because we will want to
2992 access them randomly in read_symbol*. */
2993 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2995 error (_("Error reading symbols from %s: %s"),
2996 name
, bfd_errmsg (bfd_get_error ()));
2997 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2998 info
->symtbl
= obstack_alloc (&objfile
->objfile_obstack
, size
);
2999 info
->symtbl_num_syms
= num_symbols
;
3001 val
= bfd_bread (info
->symtbl
, size
, abfd
);
3003 perror_with_name (_("reading symbol table"));
3005 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3006 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3007 /* I'm not sure how how good num_symbols is; the rule of thumb in
3008 init_psymbol_list was developed for a.out. On the one hand,
3009 num_symbols includes auxents. On the other hand, it doesn't
3011 init_psymbol_list (objfile
, num_symbols
);
3013 free_pending_blocks ();
3014 back_to
= make_cleanup (really_free_pendings
, 0);
3016 init_minimal_symbol_collection ();
3017 make_cleanup_discard_minimal_symbols ();
3019 /* Now that the symbol table data of the executable file are all in core,
3020 process them and define symbols accordingly. */
3022 scan_xcoff_symtab (objfile
);
3024 /* Install any minimal symbols that have been collected as the current
3025 minimal symbols for this objfile. */
3027 install_minimal_symbols (objfile
);
3029 /* DWARF2 sections. */
3031 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3032 dwarf2_build_psymtabs (objfile
);
3034 dwarf2_build_frame_info (objfile
);
3036 do_cleanups (back_to
);
3040 xcoff_symfile_offsets (struct objfile
*objfile
,
3041 struct section_addr_info
*addrs
)
3043 const char *first_section_name
;
3045 default_symfile_offsets (objfile
, addrs
);
3047 /* Oneof the weird side-effects of default_symfile_offsets is that
3048 it sometimes sets some section indices to zero for sections that,
3049 in fact do not exist. See the body of default_symfile_offsets
3050 for more info on when that happens. Undo that, as this then allows
3051 us to test whether the associated section exists or not, and then
3052 access it quickly (without searching it again). */
3054 if (objfile
->num_sections
== 0)
3055 return; /* Is that even possible? Better safe than sorry. */
3058 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3060 if (objfile
->sect_index_text
== 0
3061 && strcmp (first_section_name
, ".text") != 0)
3062 objfile
->sect_index_text
= -1;
3064 if (objfile
->sect_index_data
== 0
3065 && strcmp (first_section_name
, ".data") != 0)
3066 objfile
->sect_index_data
= -1;
3068 if (objfile
->sect_index_bss
== 0
3069 && strcmp (first_section_name
, ".bss") != 0)
3070 objfile
->sect_index_bss
= -1;
3072 if (objfile
->sect_index_rodata
== 0
3073 && strcmp (first_section_name
, ".rodata") != 0)
3074 objfile
->sect_index_rodata
= -1;
3077 /* Register our ability to parse symbols for xcoff BFD files. */
3079 static const struct sym_fns xcoff_sym_fns
=
3082 /* It is possible that coff and xcoff should be merged as
3083 they do have fundamental similarities (for example, the extra storage
3084 classes used for stabs could presumably be recognized in any COFF file).
3085 However, in addition to obvious things like all the csect hair, there are
3086 some subtler differences between xcoffread.c and coffread.c, notably
3087 the fact that coffread.c has no need to read in all the symbols, but
3088 xcoffread.c reads all the symbols and does in fact randomly access them
3089 (in C_BSTAT and line number processing). */
3091 bfd_target_xcoff_flavour
,
3093 xcoff_new_init
, /* init anything gbl to entire symtab */
3094 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3095 xcoff_initial_scan
, /* read a symbol file into symtab */
3096 NULL
, /* sym_read_psymbols */
3097 xcoff_symfile_finish
, /* finished with file, cleanup */
3098 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3099 default_symfile_segments
, /* Get segment information from a file. */
3100 aix_process_linenos
,
3101 default_symfile_relocate
, /* Relocate a debug section. */
3102 NULL
, /* sym_probe_fns */
3106 /* Same as xcoff_get_n_import_files, but for core files. */
3109 xcoff_get_core_n_import_files (bfd
*abfd
)
3111 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3113 file_ptr offset
= 0;
3117 return -1; /* Not a core file. */
3119 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3125 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3127 next
= bfd_get_32 (abfd
, buf
);
3129 break; /* This is the last entry. */
3133 /* Return the number of entries, excluding the first one, which is
3134 the path to the executable that produced this core file. */
3135 return n_entries
- 1;
3138 /* Return the number of import files (shared libraries) that the given
3139 BFD depends on. Return -1 if this number could not be computed. */
3142 xcoff_get_n_import_files (bfd
*abfd
)
3144 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3148 /* If the ".loader" section does not exist, the objfile is probably
3149 not an executable. Might be a core file... */
3151 return xcoff_get_core_n_import_files (abfd
);
3153 /* The number of entries in the Import Files Table is stored in
3154 field l_nimpid. This field is always at offset 16, and is
3155 always 4 bytes long. Read those 4 bytes. */
3157 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3159 l_nimpid
= bfd_get_32 (abfd
, buf
);
3161 /* By convention, the first entry is the default LIBPATH value
3162 to be used by the system loader, so it does not count towards
3163 the number of import files. */
3164 return l_nimpid
- 1;
3167 /* Free the per-objfile xcoff data. */
3170 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3175 /* Provide a prototype to silence -Wmissing-prototypes. */
3176 extern initialize_file_ftype _initialize_xcoffread
;
3179 _initialize_xcoffread (void)
3181 add_symtab_fns (&xcoff_sym_fns
);
3183 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,