1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2015 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 { NULL
, NULL
}, /* debug_macinfo */
163 { NULL
, NULL
}, /* debug_macro */
165 { ".dwrnges", NULL
},
166 { NULL
, NULL
}, /* debug_types */
167 { NULL
, NULL
}, /* debug_addr */
168 { ".dwframe", NULL
},
169 { NULL
, NULL
}, /* eh_frame */
170 { NULL
, NULL
}, /* gdb_index */
175 bf_notfound_complaint (void)
177 complaint (&symfile_complaints
,
178 _("line numbers off, `.bf' symbol not found"));
182 ef_complaint (int arg1
)
184 complaint (&symfile_complaints
,
185 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
189 eb_complaint (int arg1
)
191 complaint (&symfile_complaints
,
192 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
195 static void xcoff_initial_scan (struct objfile
*, int);
197 static void scan_xcoff_symtab (struct objfile
*);
199 static char *xcoff_next_symbol_text (struct objfile
*);
201 static void record_include_begin (struct coff_symbol
*);
204 enter_line_range (struct subfile
*, unsigned, unsigned,
205 CORE_ADDR
, CORE_ADDR
, unsigned *);
207 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
209 static void xcoff_symfile_init (struct objfile
*);
211 static void xcoff_new_init (struct objfile
*);
213 static void xcoff_symfile_finish (struct objfile
*);
215 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
217 static void read_symbol (struct internal_syment
*, int);
219 static int read_symbol_lineno (int);
221 static CORE_ADDR
read_symbol_nvalue (int);
223 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
226 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
229 static void add_stab_to_list (char *, struct pending_stabs
**);
232 static int compare_lte (const void *, const void *);
234 static struct linetable
*arrange_linetable (struct linetable
*);
236 static void record_include_end (struct coff_symbol
*);
238 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
241 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
243 static int secnum_to_section (int, struct objfile
*);
244 static asection
*secnum_to_bfd_section (int, struct objfile
*);
246 struct find_targ_sec_arg
251 struct objfile
*objfile
;
254 static void find_targ_sec (bfd
*, asection
*, void *);
257 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
259 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
260 struct objfile
*objfile
= args
->objfile
;
262 if (sect
->target_index
== args
->targ_index
)
264 /* This is the section. Figure out what SECT_OFF_* code it is. */
265 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
266 *args
->resultp
= SECT_OFF_TEXT (objfile
);
267 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
268 *args
->resultp
= SECT_OFF_DATA (objfile
);
270 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
271 *args
->bfd_sect
= sect
;
275 /* Search all BFD sections for the section whose target_index is
276 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
277 associated index in the objfile's section_offset table is also
280 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
281 is set to the text section's number. */
284 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
285 asection
**bfd_sect
, int *secnum
)
287 struct find_targ_sec_arg args
;
289 args
.targ_index
= n_scnum
;
290 args
.resultp
= secnum
;
291 args
.bfd_sect
= bfd_sect
;
292 args
.objfile
= objfile
;
295 *secnum
= SECT_OFF_TEXT (objfile
);
297 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
300 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
303 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
308 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
312 /* Return the BFD section that N_SCNUM points to. */
315 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
320 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
324 /* add a given stab string into given stab vector. */
329 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
331 if (*stabvector
== NULL
)
333 *stabvector
= (struct pending_stabs
*)
334 xmalloc (sizeof (struct pending_stabs
) +
335 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
336 (*stabvector
)->count
= 0;
337 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
339 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
341 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
342 *stabvector
= (struct pending_stabs
*)
343 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
344 (*stabvector
)->length
* sizeof (char *));
346 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
351 /* Linenos are processed on a file-by-file basis.
355 1) xlc (IBM's native c compiler) postpones static function code
356 emission to the end of a compilation unit. This way it can
357 determine if those functions (statics) are needed or not, and
358 can do some garbage collection (I think). This makes line
359 numbers and corresponding addresses unordered, and we end up
360 with a line table like:
377 and that breaks gdb's binary search on line numbers, if the
378 above table is not sorted on line numbers. And that sort
379 should be on function based, since gcc can emit line numbers
382 10 0x100 - for the init/test part of a for stmt.
385 10 0x400 - for the increment part of a for stmt.
387 arrange_linetable() will do this sorting.
389 2) aix symbol table might look like:
391 c_file // beginning of a new file
392 .bi // beginning of include file
393 .ei // end of include file
397 basically, .bi/.ei pairs do not necessarily encapsulate
398 their scope. They need to be recorded, and processed later
399 on when we come the end of the compilation unit.
400 Include table (inclTable) and process_linenos() handle
406 /* compare line table entry addresses. */
409 compare_lte (const void *lte1p
, const void *lte2p
)
411 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
412 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
414 return lte1
->pc
- lte2
->pc
;
417 /* Given a line table with function entries are marked, arrange its
418 functions in ascending order and strip off function entry markers
419 and return it in a newly created table. If the old one is good
420 enough, return the old one. */
421 /* FIXME: I think all this stuff can be replaced by just passing
422 sort_linevec = 1 to end_symtab. */
424 static struct linetable
*
425 arrange_linetable (struct linetable
*oldLineTb
)
427 int ii
, jj
, newline
, /* new line count */
428 function_count
; /* # of functions */
430 struct linetable_entry
*fentry
; /* function entry vector */
431 int fentry_size
; /* # of function entries */
432 struct linetable
*newLineTb
; /* new line table */
435 #define NUM_OF_FUNCTIONS 20
437 fentry_size
= NUM_OF_FUNCTIONS
;
438 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
440 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
442 if (oldLineTb
->item
[ii
].line
== 0)
443 { /* Function entry found. */
444 if (function_count
>= fentry_size
)
445 { /* Make sure you have room. */
447 fentry
= (struct linetable_entry
*)
449 fentry_size
* sizeof (struct linetable_entry
));
451 fentry
[function_count
].line
= ii
;
452 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
455 /* If the function was compiled with XLC, we may have to add an
456 extra line entry later. Reserve space for that. */
457 if (ii
+ 1 < oldLineTb
->nitems
458 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
463 if (function_count
== 0)
468 else if (function_count
> 1)
469 qsort (fentry
, function_count
,
470 sizeof (struct linetable_entry
), compare_lte
);
472 /* Allocate a new line table. */
473 newLineTb
= (struct linetable
*)
475 (sizeof (struct linetable
) +
476 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
478 /* If line table does not start with a function beginning, copy up until
482 if (oldLineTb
->item
[0].line
!= 0)
484 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
485 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
487 /* Now copy function lines one by one. */
489 for (ii
= 0; ii
< function_count
; ++ii
)
491 /* If the function was compiled with XLC, we may have to add an
492 extra line to cover the function prologue. */
493 jj
= fentry
[ii
].line
;
494 if (jj
+ 1 < oldLineTb
->nitems
495 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
497 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
498 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
502 for (jj
= fentry
[ii
].line
+ 1;
503 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
505 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
508 /* The number of items in the line table must include these
509 extra lines which were added in case of XLC compiled functions. */
510 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
514 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
515 following `IncludeChain'. At the end of each symtab (end_symtab),
516 we will determine if we should create additional symtab's to
517 represent if (the include files. */
520 typedef struct _inclTable
522 char *name
; /* include filename */
524 /* Offsets to the line table. end points to the last entry which is
525 part of this include file. */
528 struct subfile
*subfile
;
529 unsigned funStartLine
; /* Start line # of its function. */
533 #define INITIAL_INCLUDE_TABLE_LENGTH 20
534 static InclTable
*inclTable
; /* global include table */
535 static int inclIndx
; /* last entry to table */
536 static int inclLength
; /* table length */
537 static int inclDepth
; /* nested include depth */
539 static void allocate_include_entry (void);
542 record_include_begin (struct coff_symbol
*cs
)
546 /* In xcoff, we assume include files cannot be nested (not in .c files
547 of course, but in corresponding .s files.). */
549 /* This can happen with old versions of GCC.
550 GCC 2.3.3-930426 does not exhibit this on a test case which
551 a user said produced the message for him. */
552 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
556 allocate_include_entry ();
558 inclTable
[inclIndx
].name
= cs
->c_name
;
559 inclTable
[inclIndx
].begin
= cs
->c_value
;
563 record_include_end (struct coff_symbol
*cs
)
569 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
572 allocate_include_entry ();
574 pTbl
= &inclTable
[inclIndx
];
575 pTbl
->end
= cs
->c_value
;
582 allocate_include_entry (void)
584 if (inclTable
== NULL
)
586 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
587 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
590 else if (inclIndx
>= inclLength
)
592 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
593 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
594 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
595 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
599 /* Global variable to pass the psymtab down to all the routines involved
600 in psymtab to symtab processing. */
601 static struct partial_symtab
*this_symtab_psymtab
;
603 /* Objfile related to this_symtab_psymtab; set at the same time. */
604 static struct objfile
*this_symtab_objfile
;
606 /* given the start and end addresses of a compilation unit (or a csect,
607 at times) process its lines and create appropriate line vectors. */
610 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
614 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
616 /* subfile structure for the main compilation unit. */
617 struct subfile main_subfile
;
619 /* In the main source file, any time we see a function entry, we
620 reset this variable to function's absolute starting line number.
621 All the following line numbers in the function are relative to
622 this, and we record absolute line numbers in record_line(). */
624 unsigned int main_source_baseline
= 0;
629 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
631 goto return_after_cleanup
;
633 memset (&main_subfile
, '\0', sizeof (main_subfile
));
636 /* All source lines were in the main source file. None in include
639 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
640 &main_source_baseline
);
644 /* There was source with line numbers in include files. */
647 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
648 main_source_baseline
= 0;
650 for (ii
= 0; ii
< inclIndx
; ++ii
)
652 struct subfile
*tmpSubfile
;
654 /* If there is main file source before include file, enter it. */
655 if (offset
< inclTable
[ii
].begin
)
658 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
659 start
, 0, &main_source_baseline
);
662 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
664 /* The entry in the include table refers to the main source
665 file. Add the lines to the main subfile. */
667 main_source_baseline
= inclTable
[ii
].funStartLine
;
669 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
670 start
, 0, &main_source_baseline
);
671 inclTable
[ii
].subfile
= &main_subfile
;
675 /* Have a new subfile for the include file. */
677 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
679 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
680 firstLine
= &(inclTable
[ii
].funStartLine
);
682 /* Enter include file's lines now. */
683 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
684 inclTable
[ii
].end
, start
, 0, firstLine
);
687 if (offset
<= inclTable
[ii
].end
)
688 offset
= inclTable
[ii
].end
+ linesz
;
691 /* All the include files' line have been processed at this point. Now,
692 enter remaining lines of the main file, if any left. */
693 if (offset
< max_offset
+ 1 - linesz
)
695 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
696 &main_source_baseline
);
700 /* Process main file's line numbers. */
701 if (main_subfile
.line_vector
)
703 struct linetable
*lineTb
, *lv
;
705 lv
= main_subfile
.line_vector
;
707 /* Line numbers are not necessarily ordered. xlc compilation will
708 put static function to the end. */
710 lineTb
= arrange_linetable (lv
);
713 current_subfile
->line_vector
= (struct linetable
*)
714 xrealloc (lv
, (sizeof (struct linetable
)
715 + lv
->nitems
* sizeof (struct linetable_entry
)));
720 current_subfile
->line_vector
= lineTb
;
723 current_subfile
->line_vector_length
=
724 current_subfile
->line_vector
->nitems
;
727 /* Now, process included files' line numbers. */
729 for (ii
= 0; ii
< inclIndx
; ++ii
)
731 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
732 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
735 struct linetable
*lineTb
, *lv
;
737 lv
= (inclTable
[ii
].subfile
)->line_vector
;
739 /* Line numbers are not necessarily ordered. xlc compilation will
740 put static function to the end. */
742 lineTb
= arrange_linetable (lv
);
746 /* For the same include file, we might want to have more than one
747 subfile. This happens if we have something like:
755 while foo.h including code in it. (stupid but possible)
756 Since start_subfile() looks at the name and uses an
757 existing one if finds, we need to provide a fake name and
761 start_subfile (inclTable
[ii
].name
);
764 /* Pick a fake name that will produce the same results as this
765 one when passed to deduce_language_from_filename. Kludge on
767 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
769 if (fakename
== NULL
)
771 start_subfile (fakename
);
772 xfree (current_subfile
->name
);
774 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
779 current_subfile
->line_vector
=
780 (struct linetable
*) xrealloc
781 (lv
, (sizeof (struct linetable
)
782 + lv
->nitems
* sizeof (struct linetable_entry
)));
788 current_subfile
->line_vector
= lineTb
;
791 current_subfile
->line_vector_length
=
792 current_subfile
->line_vector
->nitems
;
793 start_subfile (pop_subfile ());
797 return_after_cleanup
:
799 /* We don't want to keep alloc/free'ing the global include file table. */
804 aix_process_linenos (struct objfile
*objfile
)
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 prim_record_minimal_symbol_and_info (name
, address
, ms_type
,
936 secnum_to_section (n_scnum
, objfile
),
940 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
941 nested. At any given time, a symbol can only be in one static block.
942 This is the base address of current static block, zero if non exists. */
944 static int static_block_base
= 0;
946 /* Section number for the current static block. */
948 static int static_block_section
= -1;
950 /* true if space for symbol name has been allocated. */
952 static int symname_alloced
= 0;
954 /* Next symbol to read. Pointer into raw seething symbol table. */
956 static char *raw_symbol
;
958 /* This is the function which stabsread.c calls to get symbol
962 xcoff_next_symbol_text (struct objfile
*objfile
)
964 struct internal_syment symbol
;
967 /* FIXME: is this the same as the passed arg? */
968 if (this_symtab_objfile
)
969 objfile
= this_symtab_objfile
;
971 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
974 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
976 /* Return something which points to '\0' and hope the symbol reading
977 code does something reasonable. */
980 else if (symbol
.n_sclass
& 0x80)
982 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
983 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
988 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
990 /* Return something which points to '\0' and hope the symbol reading
991 code does something reasonable. */
997 /* Read symbols for a given partial symbol table. */
1000 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1002 bfd
*abfd
= objfile
->obfd
;
1003 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1004 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1005 char *strtbl
= xcoff
->strtbl
;
1006 char *debugsec
= xcoff
->debugsec
;
1007 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1009 struct internal_syment symbol
[1];
1010 union internal_auxent main_aux
;
1011 struct coff_symbol cs
[1];
1012 CORE_ADDR file_start_addr
= 0;
1013 CORE_ADDR file_end_addr
= 0;
1015 int next_file_symnum
= -1;
1016 unsigned int max_symnum
;
1017 int just_started
= 1;
1019 CORE_ADDR fcn_start_addr
= 0;
1021 struct coff_symbol fcn_stab_saved
= { 0 };
1023 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1024 union internal_auxent fcn_aux_saved
= main_aux
;
1025 struct context_stack
*newobj
;
1027 char *filestring
= " _start_ "; /* Name of the current file. */
1029 const char *last_csect_name
; /* Last seen csect's name. */
1031 this_symtab_psymtab
= pst
;
1032 this_symtab_objfile
= objfile
;
1034 /* Get the appropriate COFF "constants" related to the file we're
1036 local_symesz
= coff_data (abfd
)->local_symesz
;
1038 set_last_source_file (NULL
);
1039 last_csect_name
= 0;
1042 start_symtab (objfile
, filestring
, (char *) NULL
, file_start_addr
);
1043 record_debugformat (debugfmt
);
1044 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1046 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1047 first_object_file_end
= 0;
1049 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1051 while (symnum
< max_symnum
)
1053 QUIT
; /* make this command interruptable. */
1055 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1056 /* read one symbol into `cs' structure. After processing the
1057 whole symbol table, only string table will be kept in memory,
1058 symbol table and debug section of xcoff will be freed. Thus
1059 we can mark symbols with names in string table as
1064 /* Swap and align the symbol into a reasonable C structure. */
1065 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1067 cs
->c_symnum
= symnum
;
1068 cs
->c_naux
= symbol
->n_numaux
;
1069 if (symbol
->n_zeroes
)
1071 symname_alloced
= 0;
1072 /* We must use the original, unswapped, name here so the name field
1073 pointed to by cs->c_name will persist throughout xcoffread. If
1074 we use the new field, it gets overwritten for each symbol. */
1075 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1076 /* If it's exactly E_SYMNMLEN characters long it isn't
1078 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1082 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
1083 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1084 p
[E_SYMNMLEN
] = '\0';
1086 symname_alloced
= 1;
1089 else if (symbol
->n_sclass
& 0x80)
1091 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1092 symname_alloced
= 0;
1096 /* in string table */
1097 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1098 symname_alloced
= 1;
1100 cs
->c_value
= symbol
->n_value
;
1101 cs
->c_sclass
= symbol
->n_sclass
;
1102 cs
->c_secnum
= symbol
->n_scnum
;
1103 cs
->c_type
= (unsigned) symbol
->n_type
;
1105 raw_symbol
+= local_symesz
;
1108 /* Save addr of first aux entry. */
1109 raw_auxptr
= raw_symbol
;
1111 /* Skip all the auxents associated with this symbol. */
1112 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1114 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1119 /* if symbol name starts with ".$" or "$", ignore it. */
1120 if (cs
->c_name
[0] == '$'
1121 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1124 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1126 if (get_last_source_file ())
1128 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1129 SECT_OFF_TEXT (objfile
));
1134 start_symtab (objfile
, "_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1135 record_debugformat (debugfmt
);
1136 cur_src_end_addr
= first_object_file_end
;
1137 /* Done with all files, everything from here on is globals. */
1140 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1143 /* Dealing with a symbol with a csect entry. */
1145 #define CSECT(PP) ((PP)->x_csect)
1146 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1147 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1148 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1149 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1151 /* Convert the auxent to something we can access. */
1152 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1153 0, cs
->c_naux
, &main_aux
);
1155 switch (CSECT_SMTYP (&main_aux
))
1159 /* Ignore all external references. */
1163 /* A section description. */
1165 switch (CSECT_SCLAS (&main_aux
))
1171 /* A program csect is seen. We have to allocate one
1172 symbol table for each program csect. Normally gdb
1173 prefers one symtab for each source file. In case
1174 of AIX, one source file might include more than one
1175 [PR] csect, and they don't have to be adjacent in
1176 terms of the space they occupy in memory. Thus, one
1177 single source file might get fragmented in the
1178 memory and gdb's file start and end address
1179 approach does not work! GCC (and I think xlc) seem
1180 to put all the code in the unnamed program csect. */
1182 if (last_csect_name
)
1184 complete_symtab (filestring
, file_start_addr
);
1185 cur_src_end_addr
= file_end_addr
;
1186 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1189 /* Give all csects for this source file the same
1191 start_symtab (objfile
, filestring
, NULL
,
1193 record_debugformat (debugfmt
);
1196 /* If this is the very first csect seen,
1197 basically `__start'. */
1200 first_object_file_end
1201 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1206 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1207 SECT_OFF_TEXT (objfile
));
1208 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1210 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1211 last_csect_name
= cs
->c_name
;
1215 /* All other symbols are put into the minimal symbol
1228 /* Ignore the symbol. */
1236 switch (CSECT_SCLAS (&main_aux
))
1239 /* a function entry point. */
1240 function_entry_point
:
1242 fcn_start_addr
= cs
->c_value
;
1244 /* save the function header info, which will be used
1245 when `.bf' is seen. */
1247 fcn_aux_saved
= main_aux
;
1251 /* shared library function trampoline code entry point. */
1255 /* The symbols often have the same names as debug symbols for
1256 functions, and confuse lookup_symbol. */
1260 /* xlc puts each variable in a separate csect, so we get
1261 an XTY_SD for each variable. But gcc puts several
1262 variables in a csect, so that each variable only gets
1263 an XTY_LD. This will typically be XMC_RW; I suspect
1264 XMC_RO and XMC_BS might be possible too.
1265 These variables are put in the minimal symbol table
1272 /* Common symbols are put into the minimal symbol table only. */
1280 /* If explicitly specified as a function, treat is as one. This check
1281 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1282 after the above CSECT check. */
1283 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1285 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1286 0, cs
->c_naux
, &main_aux
);
1287 goto function_entry_point
;
1290 switch (cs
->c_sclass
)
1294 /* c_value field contains symnum of next .file entry in table
1295 or symnum of first global after last .file. */
1297 next_file_symnum
= cs
->c_value
;
1299 /* Complete symbol table for last object file containing
1300 debugging information. */
1302 /* Whether or not there was a csect in the previous file, we
1303 have to call `end_stabs' and `start_stabs' to reset
1304 type_vector, line_vector, etc. structures. */
1306 complete_symtab (filestring
, file_start_addr
);
1307 cur_src_end_addr
= file_end_addr
;
1308 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1311 /* XCOFF, according to the AIX 3.2 documentation, puts the
1312 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1313 do things the standard COFF way and put it in the auxent.
1314 We use the auxent if the symbol is ".file" and an auxent
1315 exists, otherwise use the symbol itself. Simple
1317 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1319 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1320 0, cs
->c_naux
, &main_aux
);
1321 filestring
= coff_getfilename (&main_aux
, objfile
);
1324 filestring
= cs
->c_name
;
1327 start_symtab (objfile
, filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1328 record_debugformat (debugfmt
);
1329 last_csect_name
= 0;
1331 /* reset file start and end addresses. A compilation unit
1332 with no text (only data) should have zero file
1334 file_start_addr
= file_end_addr
= 0;
1338 fcn_stab_saved
= *cs
;
1342 if (strcmp (cs
->c_name
, ".bf") == 0)
1344 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1345 SECT_OFF_TEXT (objfile
));
1347 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1348 0, cs
->c_naux
, &main_aux
);
1350 within_function
= 1;
1352 newobj
= push_context (0, fcn_start_addr
+ off
);
1354 newobj
->name
= define_symbol
1355 (fcn_cs_saved
.c_value
+ off
,
1356 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1357 if (newobj
->name
!= NULL
)
1358 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1360 else if (strcmp (cs
->c_name
, ".ef") == 0)
1362 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1363 0, cs
->c_naux
, &main_aux
);
1365 /* The value of .ef is the address of epilogue code;
1366 not useful for gdb. */
1367 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1368 contains number of lines to '}' */
1370 if (context_stack_depth
<= 0)
1371 { /* We attempted to pop an empty context stack. */
1372 ef_complaint (cs
->c_symnum
);
1373 within_function
= 0;
1376 newobj
= pop_context ();
1377 /* Stack must be empty now. */
1378 if (context_stack_depth
> 0 || newobj
== NULL
)
1380 ef_complaint (cs
->c_symnum
);
1381 within_function
= 0;
1385 finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
1386 NULL
, newobj
->start_addr
,
1387 (fcn_cs_saved
.c_value
1388 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1389 + ANOFFSET (objfile
->section_offsets
,
1390 SECT_OFF_TEXT (objfile
))));
1391 within_function
= 0;
1396 /* Begin static block. */
1398 struct internal_syment symbol
;
1400 read_symbol (&symbol
, cs
->c_value
);
1401 static_block_base
= symbol
.n_value
;
1402 static_block_section
=
1403 secnum_to_section (symbol
.n_scnum
, objfile
);
1408 /* End of static block. */
1409 static_block_base
= 0;
1410 static_block_section
= -1;
1421 complaint (&symfile_complaints
,
1422 _("Unrecognized storage class %d."),
1437 /* beginning of include file */
1438 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1439 order. Thus, when wee see them, we might not know enough info
1440 to process them. Thus, we'll be saving them into a table
1441 (inclTable) and postpone their processing. */
1443 record_include_begin (cs
);
1447 /* End of include file. */
1448 /* See the comment after case C_BINCL. */
1449 record_include_end (cs
);
1453 if (strcmp (cs
->c_name
, ".bb") == 0)
1456 newobj
= push_context (depth
,
1458 + ANOFFSET (objfile
->section_offsets
,
1459 SECT_OFF_TEXT (objfile
))));
1461 else if (strcmp (cs
->c_name
, ".eb") == 0)
1463 if (context_stack_depth
<= 0)
1464 { /* We attempted to pop an empty context stack. */
1465 eb_complaint (cs
->c_symnum
);
1468 newobj
= pop_context ();
1469 if (depth
-- != newobj
->depth
)
1471 eb_complaint (cs
->c_symnum
);
1474 if (local_symbols
&& context_stack_depth
> 0)
1476 /* Make a block for the local symbols within. */
1477 finish_block (newobj
->name
, &local_symbols
,
1478 newobj
->old_blocks
, NULL
,
1481 + ANOFFSET (objfile
->section_offsets
,
1482 SECT_OFF_TEXT (objfile
))));
1484 local_symbols
= newobj
->locals
;
1489 process_xcoff_symbol (cs
, objfile
);
1494 if (get_last_source_file ())
1496 struct compunit_symtab
*cust
;
1498 complete_symtab (filestring
, file_start_addr
);
1499 cur_src_end_addr
= file_end_addr
;
1500 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1501 /* When reading symbols for the last C_FILE of the objfile, try
1502 to make sure that we set pst->compunit_symtab to the symtab for the
1503 file, not to the _globals_ symtab. I'm not sure whether this
1504 actually works right or when/if it comes up. */
1505 if (pst
->compunit_symtab
== NULL
)
1506 pst
->compunit_symtab
= cust
;
1511 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1512 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1513 *(SYMBOL2) = *(SYMBOL1);
1516 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1517 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1518 (NAME), strlen (NAME)))
1521 /* process one xcoff symbol. */
1523 static struct symbol
*
1524 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1526 struct symbol onesymbol
;
1527 struct symbol
*sym
= &onesymbol
;
1528 struct symbol
*sym2
= NULL
;
1534 if (cs
->c_secnum
< 0)
1536 /* The value is a register number, offset within a frame, etc.,
1537 and does not get relocated. */
1543 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1544 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1551 initialize_objfile_symbol (sym
);
1553 /* default assumptions */
1554 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1555 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1556 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1558 if (ISFCN (cs
->c_type
))
1560 /* At this point, we don't know the type of the function. This
1561 will be patched with the type from its stab entry later on in
1562 patch_block_stabs (), unless the file was compiled without -g. */
1564 SYMBOL_SET_LINKAGE_NAME (sym
, SYMNAME_ALLOC (name
, symname_alloced
));
1565 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1567 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1568 SYMBOL_DUP (sym
, sym2
);
1570 if (cs
->c_sclass
== C_EXT
)
1571 add_symbol_to_list (sym2
, &global_symbols
);
1572 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1573 add_symbol_to_list (sym2
, &file_symbols
);
1577 /* In case we can't figure out the type, provide default. */
1578 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1580 switch (cs
->c_sclass
)
1583 /* The values of functions and global symbols are now resolved
1584 via the global_sym_chain in stabsread.c. */
1586 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1587 add_stab_to_list (name
, &global_stabs
);
1589 add_stab_to_list (name
, &file_stabs
);
1593 add_stab_to_list (name
, &global_stabs
);
1598 common_block_start (cs
->c_name
, objfile
);
1602 common_block_end (objfile
);
1606 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1619 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1622 SYMBOL_SECTION (sym
) = sec
;
1629 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1630 all statics and we need to distinguish file-scope versus
1631 function-scope using within_function. We do this by
1632 changing the string we pass to define_symbol to use 'S'
1633 where we need to, which is not necessarily super-clean,
1634 but seems workable enough. */
1639 pp
= strchr (name
, ':');
1644 if (*pp
== 'V' && !within_function
)
1646 sym
= define_symbol ((cs
->c_value
1647 + ANOFFSET (objfile
->section_offsets
,
1648 static_block_section
)),
1649 cs
->c_name
, 0, 0, objfile
);
1652 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1653 SYMBOL_SECTION (sym
) = static_block_section
;
1662 /* Extract the file name from the aux entry of a C_FILE symbol.
1663 Result is in static storage and is only good for temporary use. */
1666 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1668 static char buffer
[BUFSIZ
];
1670 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1671 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1672 + aux_entry
->x_file
.x_n
.x_offset
));
1675 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1676 buffer
[FILNMLEN
] = '\0';
1681 /* Set *SYMBOL to symbol number symno in symtbl. */
1683 read_symbol (struct internal_syment
*symbol
, int symno
)
1685 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1686 int nsyms
= xcoff
->symtbl_num_syms
;
1687 char *stbl
= xcoff
->symtbl
;
1689 if (symno
< 0 || symno
>= nsyms
)
1691 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1692 symbol
->n_value
= 0;
1693 symbol
->n_scnum
= -1;
1696 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1697 stbl
+ (symno
* local_symesz
),
1701 /* Get value corresponding to symbol number symno in symtbl. */
1704 read_symbol_nvalue (int symno
)
1706 struct internal_syment symbol
[1];
1708 read_symbol (symbol
, symno
);
1709 return symbol
->n_value
;
1713 /* Find the address of the function corresponding to symno, where
1714 symno is the symbol pointed to by the linetable. */
1717 read_symbol_lineno (int symno
)
1719 struct objfile
*objfile
= this_symtab_objfile
;
1720 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1722 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1723 int nsyms
= info
->symtbl_num_syms
;
1724 char *stbl
= info
->symtbl
;
1725 char *strtbl
= info
->strtbl
;
1727 struct internal_syment symbol
[1];
1728 union internal_auxent main_aux
[1];
1732 bf_notfound_complaint ();
1736 /* Note that just searching for a short distance (e.g. 50 symbols)
1737 is not enough, at least in the following case.
1740 [many .stabx entries]
1741 [a few functions, referring to foo]
1745 What happens here is that the assembler moves the .stabx entries
1746 to right before the ".bf" for foo, but the symbol for "foo" is before
1747 all the stabx entries. See PR gdb/2222. */
1749 /* Maintaining a table of .bf entries might be preferable to this search.
1750 If I understand things correctly it would need to be done only for
1751 the duration of a single psymtab to symtab conversion. */
1752 while (symno
< nsyms
)
1754 bfd_coff_swap_sym_in (symfile_bfd
,
1755 stbl
+ (symno
* local_symesz
), symbol
);
1756 if (symbol
->n_sclass
== C_FCN
)
1758 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1760 if (strcmp (name
, ".bf") == 0)
1763 symno
+= symbol
->n_numaux
+ 1;
1766 bf_notfound_complaint ();
1770 /* Take aux entry and return its lineno. */
1772 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1773 symbol
->n_type
, symbol
->n_sclass
,
1774 0, symbol
->n_numaux
, main_aux
);
1776 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1779 /* Support for line number handling. */
1781 /* This function is called for every section; it finds the outer limits
1782 * of the line table (minimum and maximum file offset) so that the
1783 * mainline code can read the whole thing for efficiency.
1786 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1788 struct coff_symfile_info
*info
;
1790 file_ptr offset
, maxoff
;
1792 count
= asect
->lineno_count
;
1794 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1797 size
= count
* coff_data (abfd
)->local_linesz
;
1798 info
= (struct coff_symfile_info
*) vpinfo
;
1799 offset
= asect
->line_filepos
;
1800 maxoff
= offset
+ size
;
1802 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1803 info
->min_lineno_offset
= offset
;
1805 if (maxoff
> info
->max_lineno_offset
)
1806 info
->max_lineno_offset
= maxoff
;
1810 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1812 struct cleanup
*old_chain
;
1821 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1826 /* Read in all partial symtabs on which this one is dependent. */
1827 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1828 if (!pst
->dependencies
[i
]->readin
)
1830 /* Inform about additional files that need to be read in. */
1833 fputs_filtered (" ", gdb_stdout
);
1835 fputs_filtered ("and ", gdb_stdout
);
1837 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1838 wrap_here (""); /* Flush output */
1839 gdb_flush (gdb_stdout
);
1841 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1844 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1846 /* Init stuff necessary for reading in symbols. */
1849 old_chain
= make_cleanup (really_free_pendings
, 0);
1851 read_xcoff_symtab (objfile
, pst
);
1853 do_cleanups (old_chain
);
1859 /* Read in all of the symbols for a given psymtab for real.
1860 Be verbose about it if the user wants that. SELF is not NULL. */
1863 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1868 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1873 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1874 || self
->number_of_dependencies
)
1876 /* Print the message now, before reading the string table,
1877 to avoid disconcerting pauses. */
1880 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1881 gdb_flush (gdb_stdout
);
1884 next_symbol_text_func
= xcoff_next_symbol_text
;
1886 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1888 /* Match with global symbols. This only needs to be done once,
1889 after all of the symtabs and dependencies have been read in. */
1890 scan_file_globals (objfile
);
1892 /* Finish up the debug error message. */
1894 printf_filtered ("done.\n");
1899 xcoff_new_init (struct objfile
*objfile
)
1901 stabsread_new_init ();
1902 buildsym_new_init ();
1905 /* Do initialization in preparation for reading symbols from OBJFILE.
1907 We will only be called if this is an XCOFF or XCOFF-like file.
1908 BFD handles figuring out the format of the file, and code in symfile.c
1909 uses BFD's determination to vector to us. */
1912 xcoff_symfile_init (struct objfile
*objfile
)
1914 struct coff_symfile_info
*xcoff
;
1916 /* Allocate struct to keep track of the symfile. */
1917 xcoff
= XNEW (struct coff_symfile_info
);
1918 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1920 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1921 find this causes a significant slowdown in gdb then we could
1922 set it in the debug symbol readers only when necessary. */
1923 objfile
->flags
|= OBJF_REORDERED
;
1926 /* Perform any local cleanups required when we are done with a particular
1927 objfile. I.E, we are in the process of discarding all symbol information
1928 for an objfile, freeing up all memory held for it, and unlinking the
1929 objfile struct from the global list of known objfiles. */
1932 xcoff_symfile_finish (struct objfile
*objfile
)
1934 /* Start with a fresh include table for the next objfile. */
1940 inclIndx
= inclLength
= inclDepth
= 0;
1942 dwarf2_free_objfile (objfile
);
1947 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1951 unsigned char lengthbuf
[4];
1953 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1955 xcoff
->strtbl
= NULL
;
1957 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1958 error (_("cannot seek to string table in %s: %s"),
1959 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1961 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1962 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1964 /* If no string table is needed, then the file may end immediately
1965 after the symbols. Just return with `strtbl' set to NULL. */
1967 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1970 /* Allocate string table from objfile_obstack. We will need this table
1971 as long as we have its symbol table around. */
1973 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1974 xcoff
->strtbl
= strtbl
;
1976 /* Copy length buffer, the first byte is usually zero and is
1977 used for stabs with a name length of zero. */
1978 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1979 if (length
== sizeof lengthbuf
)
1982 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1984 if (val
!= length
- sizeof lengthbuf
)
1985 error (_("cannot read string table from %s: %s"),
1986 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1987 if (strtbl
[length
- 1] != '\0')
1988 error (_("bad symbol file: string table "
1989 "does not end with null character"));
1994 /* If we have not yet seen a function for this psymtab, this is 0. If we
1995 have seen one, it is the offset in the line numbers of the line numbers
1997 static unsigned int first_fun_line_offset
;
1999 /* Allocate and partially fill a partial symtab. It will be
2000 completely filled at the end of the symbol list.
2002 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2003 is the address relative to which its symbols are (incremental) or 0
2006 static struct partial_symtab
*
2007 xcoff_start_psymtab (struct objfile
*objfile
,
2008 const char *filename
, int first_symnum
,
2009 struct partial_symbol
**global_syms
,
2010 struct partial_symbol
**static_syms
)
2012 struct partial_symtab
*result
=
2013 start_psymtab_common (objfile
,
2015 /* We fill in textlow later. */
2017 global_syms
, static_syms
);
2019 result
->read_symtab_private
=
2020 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2021 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2022 result
->read_symtab
= xcoff_read_symtab
;
2024 /* Deduce the source language from the filename for this psymtab. */
2025 psymtab_language
= deduce_language_from_filename (filename
);
2030 /* Close off the current usage of PST.
2031 Returns PST, or NULL if the partial symtab was empty and thrown away.
2033 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2035 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2036 are the information for includes and dependencies. */
2038 static struct partial_symtab
*
2039 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2040 const char **include_list
, int num_includes
,
2041 int capping_symbol_number
,
2042 struct partial_symtab
**dependency_list
,
2043 int number_dependencies
, int textlow_not_set
)
2047 if (capping_symbol_number
!= -1)
2048 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2049 capping_symbol_number
2050 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2051 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2052 first_fun_line_offset
;
2053 first_fun_line_offset
= 0;
2055 end_psymtab_common (objfile
, pst
);
2057 pst
->number_of_dependencies
= number_dependencies
;
2058 if (number_dependencies
)
2060 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2061 struct partial_symtab
*,
2062 number_dependencies
);
2063 memcpy (pst
->dependencies
, dependency_list
,
2064 number_dependencies
* sizeof (struct partial_symtab
*));
2067 pst
->dependencies
= 0;
2069 for (i
= 0; i
< num_includes
; i
++)
2071 struct partial_symtab
*subpst
=
2072 allocate_psymtab (include_list
[i
], objfile
);
2074 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2075 sizeof (struct symloc
));
2076 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2077 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2078 subpst
->textlow
= 0;
2079 subpst
->texthigh
= 0;
2081 /* We could save slight bits of space by only making one of these,
2082 shared by the entire set of include files. FIXME-someday. */
2083 subpst
->dependencies
=
2084 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2085 subpst
->dependencies
[0] = pst
;
2086 subpst
->number_of_dependencies
= 1;
2088 subpst
->globals_offset
=
2089 subpst
->n_global_syms
=
2090 subpst
->statics_offset
=
2091 subpst
->n_static_syms
= 0;
2094 subpst
->compunit_symtab
= NULL
;
2095 subpst
->read_symtab
= pst
->read_symtab
;
2098 if (num_includes
== 0
2099 && number_dependencies
== 0
2100 && pst
->n_global_syms
== 0
2101 && pst
->n_static_syms
== 0)
2103 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2104 it is on the obstack, but we can forget to chain it on the list. */
2105 /* Empty psymtabs happen as a result of header files which don't have
2106 any symbols in them. There can be a lot of them. */
2108 discard_psymtab (objfile
, pst
);
2110 /* Indicate that psymtab was thrown away. */
2111 pst
= (struct partial_symtab
*) NULL
;
2116 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2117 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2118 the symbol and its auxents. */
2121 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2122 const char **name
, char **raw
, unsigned int *symnump
,
2123 struct objfile
*objfile
)
2125 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2126 if (symbol
->n_zeroes
)
2128 /* If it's exactly E_SYMNMLEN characters long it isn't
2130 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2132 /* FIXME: wastes memory for symbols which we don't end up putting
2133 into the minimal symbols. */
2136 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
2137 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2138 p
[E_SYMNMLEN
] = '\0';
2142 /* Point to the unswapped name as that persists as long as the
2144 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2146 else if (symbol
->n_sclass
& 0x80)
2148 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2152 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2155 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2156 if (symbol
->n_numaux
> 0)
2158 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2159 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2161 *symnump
+= symbol
->n_numaux
;
2162 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2167 function_outside_compilation_unit_complaint (const char *arg1
)
2169 complaint (&symfile_complaints
,
2170 _("function `%s' appears to be defined "
2171 "outside of all compilation units"),
2176 scan_xcoff_symtab (struct objfile
*objfile
)
2178 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2179 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2180 const char *filestring
= NULL
;
2182 const char *namestring
;
2183 int past_first_source_file
= 0;
2188 /* Current partial symtab */
2189 struct partial_symtab
*pst
;
2191 /* List of current psymtab's include files. */
2192 const char **psymtab_include_list
;
2193 int includes_allocated
;
2196 /* Index within current psymtab dependency list. */
2197 struct partial_symtab
**dependency_list
;
2198 int dependencies_used
, dependencies_allocated
;
2201 struct internal_syment symbol
;
2202 union internal_auxent main_aux
[5];
2203 unsigned int ssymnum
;
2205 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2206 CORE_ADDR last_csect_val
= 0;
2207 int last_csect_sec
= 0;
2208 int misc_func_recorded
= 0; /* true if any misc. function. */
2209 int textlow_not_set
= 1;
2211 pst
= (struct partial_symtab
*) 0;
2213 includes_allocated
= 30;
2215 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2216 sizeof (const char *));
2218 dependencies_allocated
= 30;
2219 dependencies_used
= 0;
2221 (struct partial_symtab
**) alloca (dependencies_allocated
*
2222 sizeof (struct partial_symtab
*));
2224 set_last_source_file (NULL
);
2226 abfd
= objfile
->obfd
;
2227 next_symbol_text_func
= xcoff_next_symbol_text
;
2229 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2230 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2232 while (ssymnum
< nsyms
)
2238 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2239 sclass
= symbol
.n_sclass
;
2246 /* The CSECT auxent--always the last auxent. */
2247 union internal_auxent csect_aux
;
2248 unsigned int symnum_before
= ssymnum
;
2250 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2252 if (symbol
.n_numaux
> 1)
2254 bfd_coff_swap_aux_in
2256 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2259 symbol
.n_numaux
- 1,
2264 csect_aux
= main_aux
[0];
2266 /* If symbol name starts with ".$" or "$", ignore it. */
2267 if (namestring
[0] == '$'
2268 || (namestring
[0] == '.' && namestring
[1] == '$'))
2271 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2274 switch (csect_aux
.x_csect
.x_smclas
)
2277 if (last_csect_name
)
2279 /* If no misc. function recorded in the last
2280 seen csect, enter it as a function. This
2281 will take care of functions like strcmp()
2284 if (!misc_func_recorded
)
2286 record_minimal_symbol
2287 (last_csect_name
, last_csect_val
,
2288 mst_text
, last_csect_sec
, objfile
);
2289 misc_func_recorded
= 1;
2294 /* We have to allocate one psymtab for
2295 each program csect, because their text
2296 sections need not be adjacent. */
2298 (objfile
, pst
, psymtab_include_list
,
2299 includes_used
, symnum_before
, dependency_list
,
2300 dependencies_used
, textlow_not_set
);
2302 dependencies_used
= 0;
2303 /* Give all psymtabs for this source file the same
2305 pst
= xcoff_start_psymtab
2309 objfile
->global_psymbols
.next
,
2310 objfile
->static_psymbols
.next
);
2313 /* Activate the misc_func_recorded mechanism for
2314 compiler- and linker-generated CSECTs like ".strcmp"
2316 if (namestring
&& (namestring
[0] == '.'
2317 || namestring
[0] == '@'))
2319 last_csect_name
= namestring
;
2320 last_csect_val
= symbol
.n_value
;
2321 last_csect_sec
= symbol
.n_scnum
;
2326 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2328 if (highval
> pst
->texthigh
)
2329 pst
->texthigh
= highval
;
2330 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2331 pst
->textlow
= symbol
.n_value
;
2333 misc_func_recorded
= 0;
2338 /* Data variables are recorded in the minimal symbol
2339 table, except for section symbols. */
2340 if (*namestring
!= '.')
2341 record_minimal_symbol
2342 (namestring
, symbol
.n_value
,
2343 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2344 symbol
.n_scnum
, objfile
);
2349 warning (_("More than one XMC_TC0 symbol found."));
2350 toc_offset
= symbol
.n_value
;
2352 /* Make TOC offset relative to start address of
2354 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2356 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2360 /* These symbols tell us where the TOC entry for a
2361 variable is, not the variable itself. */
2370 switch (csect_aux
.x_csect
.x_smclas
)
2373 /* A function entry point. */
2375 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2376 first_fun_line_offset
=
2377 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2379 record_minimal_symbol
2380 (namestring
, symbol
.n_value
,
2381 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2382 symbol
.n_scnum
, objfile
);
2383 misc_func_recorded
= 1;
2388 /* shared library function trampoline code entry
2391 /* record trampoline code entries as
2392 mst_solib_trampoline symbol. When we lookup mst
2393 symbols, we will choose mst_text over
2394 mst_solib_trampoline. */
2395 record_minimal_symbol
2396 (namestring
, symbol
.n_value
,
2397 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2398 misc_func_recorded
= 1;
2402 /* The symbols often have the same names as
2403 debug symbols for functions, and confuse
2409 /* xlc puts each variable in a separate csect,
2410 so we get an XTY_SD for each variable. But
2411 gcc puts several variables in a csect, so
2412 that each variable only gets an XTY_LD. We
2413 still need to record them. This will
2414 typically be XMC_RW; I suspect XMC_RO and
2415 XMC_BS might be possible too. */
2416 if (*namestring
!= '.')
2417 record_minimal_symbol
2418 (namestring
, symbol
.n_value
,
2419 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2420 symbol
.n_scnum
, objfile
);
2426 switch (csect_aux
.x_csect
.x_smclas
)
2430 /* Common variables are recorded in the minimal symbol
2431 table, except for section symbols. */
2432 if (*namestring
!= '.')
2433 record_minimal_symbol
2434 (namestring
, symbol
.n_value
,
2435 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2436 symbol
.n_scnum
, objfile
);
2448 unsigned int symnum_before
;
2450 symnum_before
= ssymnum
;
2451 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2454 /* See if the last csect needs to be recorded. */
2456 if (last_csect_name
&& !misc_func_recorded
)
2458 /* If no misc. function recorded in the last seen csect, enter
2459 it as a function. This will take care of functions like
2460 strcmp() compiled by xlc. */
2462 record_minimal_symbol (last_csect_name
, last_csect_val
,
2463 mst_text
, last_csect_sec
, objfile
);
2464 misc_func_recorded
= 1;
2469 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2470 includes_used
, symnum_before
,
2471 dependency_list
, dependencies_used
,
2474 dependencies_used
= 0;
2476 first_fun_line_offset
= 0;
2478 /* XCOFF, according to the AIX 3.2 documentation, puts the
2479 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2480 do things the standard COFF way and put it in the auxent.
2481 We use the auxent if the symbol is ".file" and an auxent
2482 exists, otherwise use the symbol itself. */
2483 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2485 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2488 filestring
= namestring
;
2490 pst
= xcoff_start_psymtab (objfile
,
2493 objfile
->global_psymbols
.next
,
2494 objfile
->static_psymbols
.next
);
2495 last_csect_name
= NULL
;
2501 complaint (&symfile_complaints
,
2502 _("Storage class %d not recognized during scan"),
2507 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2508 to handle only the C_FUN and C_EXT. */
2523 /* C_EINCL means we are switching back to the main file. But there
2524 is no reason to care; the only thing we want to know about
2525 includes is the names of all the included (.h) files. */
2530 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2534 /* I don't think the name of the common block (as opposed to the
2535 variables within it) is something which is user visible
2543 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2544 so C_LSYM would appear to be only for locals. */
2550 /* We probably could save a few instructions by assuming that
2551 C_LSYM, C_PSYM, etc., never have auxents. */
2552 int naux1
= symbol
.n_numaux
+ 1;
2555 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2561 /* Mark down an include file in the current psymtab. */
2562 enum language tmp_language
;
2564 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2567 tmp_language
= deduce_language_from_filename (namestring
);
2569 /* Only change the psymtab's language if we've learned
2570 something useful (eg. tmp_language is not language_unknown).
2571 In addition, to match what start_subfile does, never change
2573 if (tmp_language
!= language_unknown
2574 && (tmp_language
!= language_c
2575 || psymtab_language
!= language_cplus
))
2576 psymtab_language
= tmp_language
;
2578 /* In C++, one may expect the same filename to come round many
2579 times, when code is coming alternately from the main file
2580 and from inline functions in other files. So I check to see
2581 if this is a file we've seen before -- either the main
2582 source file, or a previously included file.
2584 This seems to be a lot of time to be spending on N_SOL, but
2585 things like "break c-exp.y:435" need to work (I
2586 suppose the psymtab_include_list could be hashed or put
2587 in a binary tree, if profiling shows this is a major hog). */
2588 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2594 for (i
= 0; i
< includes_used
; i
++)
2595 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2603 psymtab_include_list
[includes_used
++] = namestring
;
2604 if (includes_used
>= includes_allocated
)
2606 const char **orig
= psymtab_include_list
;
2608 psymtab_include_list
= (const char **)
2609 alloca ((includes_allocated
*= 2) *
2610 sizeof (const char *));
2611 memcpy (psymtab_include_list
, orig
,
2612 includes_used
* sizeof (const char *));
2617 /* The value of the C_FUN is not the address of the function (it
2618 appears to be the address before linking), but as long as it
2619 is smaller than the actual address, then find_pc_partial_function
2620 will use the minimal symbols instead. I hope. */
2629 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2632 p
= strchr (namestring
, ':');
2634 continue; /* Not a debugging symbol. */
2636 /* Main processing section for debugging symbols which
2637 the initial read through the symbol tables needs to worry
2638 about. If we reach this point, the symbol which we are
2639 considering is definitely one we are interested in.
2640 p must also contain the (valid) index into the namestring
2641 which indicates the debugging type symbol. */
2646 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2647 SECT_OFF_DATA (objfile
));
2649 if (gdbarch_static_transform_name_p (gdbarch
))
2650 namestring
= gdbarch_static_transform_name
2651 (gdbarch
, namestring
);
2653 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2654 VAR_DOMAIN
, LOC_STATIC
,
2655 &objfile
->static_psymbols
,
2657 psymtab_language
, objfile
);
2661 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2662 SECT_OFF_DATA (objfile
));
2663 /* The addresses in these entries are reported to be
2664 wrong. See the code that reads 'G's for symtabs. */
2665 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2666 VAR_DOMAIN
, LOC_STATIC
,
2667 &objfile
->global_psymbols
,
2669 psymtab_language
, objfile
);
2673 /* When a 'T' entry is defining an anonymous enum, it
2674 may have a name which is the empty string, or a
2675 single space. Since they're not really defining a
2676 symbol, those shouldn't go in the partial symbol
2677 table. We do pick up the elements of such enums at
2678 'check_enum:', below. */
2679 if (p
>= namestring
+ 2
2680 || (p
== namestring
+ 1
2681 && namestring
[0] != ' '))
2683 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2684 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2685 &objfile
->static_psymbols
,
2686 0, psymtab_language
, objfile
);
2689 /* Also a typedef with the same name. */
2690 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2691 VAR_DOMAIN
, LOC_TYPEDEF
,
2692 &objfile
->static_psymbols
,
2693 0, psymtab_language
, objfile
);
2700 if (p
!= namestring
) /* a name is there, not just :T... */
2702 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2703 VAR_DOMAIN
, LOC_TYPEDEF
,
2704 &objfile
->static_psymbols
,
2705 0, psymtab_language
, objfile
);
2708 /* If this is an enumerated type, we need to
2709 add all the enum constants to the partial symbol
2710 table. This does not cover enums without names, e.g.
2711 "enum {a, b} c;" in C, but fortunately those are
2712 rare. There is no way for GDB to find those from the
2713 enum type without spending too much time on it. Thus
2714 to solve this problem, the compiler needs to put out the
2715 enum in a nameless type. GCC2 does this. */
2717 /* We are looking for something of the form
2718 <name> ":" ("t" | "T") [<number> "="] "e"
2719 {<constant> ":" <value> ","} ";". */
2721 /* Skip over the colon and the 't' or 'T'. */
2723 /* This type may be given a number. Also, numbers can come
2724 in pairs like (0,26). Skip over it. */
2725 while ((*p
>= '0' && *p
<= '9')
2726 || *p
== '(' || *p
== ',' || *p
== ')'
2732 /* The aix4 compiler emits extra crud before the
2736 /* Skip over the type (?). */
2740 /* Skip over the colon. */
2744 /* We have found an enumerated type. */
2745 /* According to comments in read_enum_type
2746 a comma could end it instead of a semicolon.
2747 I don't know where that happens.
2749 while (*p
&& *p
!= ';' && *p
!= ',')
2753 /* Check for and handle cretinous dbx symbol name
2755 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2756 p
= next_symbol_text (objfile
);
2758 /* Point to the character after the name
2759 of the enum constant. */
2760 for (q
= p
; *q
&& *q
!= ':'; q
++)
2762 /* Note that the value doesn't matter for
2763 enum constants in psymtabs, just in symtabs. */
2764 add_psymbol_to_list (p
, q
- p
, 1,
2765 VAR_DOMAIN
, LOC_CONST
,
2766 &objfile
->static_psymbols
,
2767 0, psymtab_language
, objfile
);
2768 /* Point past the name. */
2770 /* Skip over the value. */
2771 while (*p
&& *p
!= ',')
2773 /* Advance past the comma. */
2781 /* Constant, e.g. from "const" in Pascal. */
2782 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2783 VAR_DOMAIN
, LOC_CONST
,
2784 &objfile
->static_psymbols
,
2785 0, psymtab_language
, objfile
);
2791 int name_len
= p
- namestring
;
2792 char *name
= xmalloc (name_len
+ 1);
2794 memcpy (name
, namestring
, name_len
);
2795 name
[name_len
] = '\0';
2796 function_outside_compilation_unit_complaint (name
);
2799 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2800 SECT_OFF_TEXT (objfile
));
2801 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2802 VAR_DOMAIN
, LOC_BLOCK
,
2803 &objfile
->static_psymbols
,
2805 psymtab_language
, objfile
);
2808 /* Global functions were ignored here, but now they
2809 are put into the global psymtab like one would expect.
2810 They're also in the minimal symbol table. */
2814 int name_len
= p
- namestring
;
2815 char *name
= xmalloc (name_len
+ 1);
2817 memcpy (name
, namestring
, name_len
);
2818 name
[name_len
] = '\0';
2819 function_outside_compilation_unit_complaint (name
);
2823 /* We need only the minimal symbols for these
2824 loader-generated definitions. Keeping the global
2825 symbols leads to "in psymbols but not in symbols"
2827 if (startswith (namestring
, "@FIX"))
2830 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2831 SECT_OFF_TEXT (objfile
));
2832 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2833 VAR_DOMAIN
, LOC_BLOCK
,
2834 &objfile
->global_psymbols
,
2836 psymtab_language
, objfile
);
2839 /* Two things show up here (hopefully); static symbols of
2840 local scope (static used inside braces) or extensions
2841 of structure symbols. We can ignore both. */
2855 case '#': /* For symbol identification (used in
2860 /* It is a C++ nested symbol. We don't need to record it
2861 (I don't think); if we try to look up foo::bar::baz,
2862 then symbols for the symtab containing foo should get
2863 read in, I think. */
2864 /* Someone says sun cc puts out symbols like
2865 /foo/baz/maclib::/usr/local/bin/maclib,
2866 which would get here with a symbol type of ':'. */
2870 /* Unexpected symbol descriptor. The second and
2871 subsequent stabs of a continued stab can show up
2872 here. The question is whether they ever can mimic
2873 a normal stab--it would be nice if not, since we
2874 certainly don't want to spend the time searching to
2875 the end of every string looking for a
2878 complaint (&symfile_complaints
,
2879 _("unknown symbol descriptor `%c'"), p
[1]);
2881 /* Ignore it; perhaps it is an extension that we don't
2891 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2892 ssymnum
, dependency_list
,
2893 dependencies_used
, textlow_not_set
);
2896 /* Record the toc offset value of this symbol table into objfile
2897 structure. If no XMC_TC0 is found, toc_offset should be zero.
2898 Another place to obtain this information would be file auxiliary
2901 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2904 /* Return the toc offset value for a given objfile. */
2907 xcoff_get_toc_offset (struct objfile
*objfile
)
2910 return XCOFF_DATA (objfile
)->toc_offset
;
2914 /* Scan and build partial symbols for a symbol file.
2915 We have been initialized by a call to dbx_symfile_init, which
2916 put all the relevant info into a "struct dbx_symfile_info",
2917 hung off the objfile structure.
2919 SECTION_OFFSETS contains offsets relative to which the symbols in the
2920 various sections are (depending where the sections were actually
2924 xcoff_initial_scan (struct objfile
*objfile
, int symfile_flags
)
2928 struct cleanup
*back_to
;
2929 int num_symbols
; /* # of symbols */
2930 file_ptr symtab_offset
; /* symbol table and */
2931 file_ptr stringtab_offset
; /* string table file offsets */
2932 struct coff_symfile_info
*info
;
2936 info
= XCOFF_DATA (objfile
);
2937 symfile_bfd
= abfd
= objfile
->obfd
;
2938 name
= objfile_name (objfile
);
2940 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2941 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2942 stringtab_offset
= symtab_offset
+
2943 num_symbols
* coff_data (abfd
)->local_symesz
;
2945 info
->min_lineno_offset
= 0;
2946 info
->max_lineno_offset
= 0;
2947 bfd_map_over_sections (abfd
, find_linenos
, info
);
2949 if (num_symbols
> 0)
2951 /* Read the string table. */
2952 init_stringtab (abfd
, stringtab_offset
, objfile
);
2954 /* Read the .debug section, if present. */
2956 struct bfd_section
*secp
;
2957 bfd_size_type length
;
2958 bfd_byte
*debugsec
= NULL
;
2960 secp
= bfd_get_section_by_name (abfd
, ".debug");
2963 length
= bfd_section_size (abfd
, secp
);
2966 debugsec
= obstack_alloc (&objfile
->objfile_obstack
, length
);
2968 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2970 error (_("Error reading .debug section of `%s': %s"),
2971 name
, bfd_errmsg (bfd_get_error ()));
2975 info
->debugsec
= (char *) debugsec
;
2979 /* Read the symbols. We keep them in core because we will want to
2980 access them randomly in read_symbol*. */
2981 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2983 error (_("Error reading symbols from %s: %s"),
2984 name
, bfd_errmsg (bfd_get_error ()));
2985 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2986 info
->symtbl
= obstack_alloc (&objfile
->objfile_obstack
, size
);
2987 info
->symtbl_num_syms
= num_symbols
;
2989 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2991 perror_with_name (_("reading symbol table"));
2993 /* If we are reinitializing, or if we have never loaded syms yet, init. */
2994 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
2995 /* I'm not sure how how good num_symbols is; the rule of thumb in
2996 init_psymbol_list was developed for a.out. On the one hand,
2997 num_symbols includes auxents. On the other hand, it doesn't
2999 init_psymbol_list (objfile
, num_symbols
);
3001 free_pending_blocks ();
3002 back_to
= make_cleanup (really_free_pendings
, 0);
3004 init_minimal_symbol_collection ();
3005 make_cleanup_discard_minimal_symbols ();
3007 /* Now that the symbol table data of the executable file are all in core,
3008 process them and define symbols accordingly. */
3010 scan_xcoff_symtab (objfile
);
3012 /* Install any minimal symbols that have been collected as the current
3013 minimal symbols for this objfile. */
3015 install_minimal_symbols (objfile
);
3017 /* DWARF2 sections. */
3019 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3020 dwarf2_build_psymtabs (objfile
);
3022 dwarf2_build_frame_info (objfile
);
3024 do_cleanups (back_to
);
3028 xcoff_symfile_offsets (struct objfile
*objfile
,
3029 const struct section_addr_info
*addrs
)
3031 const char *first_section_name
;
3033 default_symfile_offsets (objfile
, addrs
);
3035 /* Oneof the weird side-effects of default_symfile_offsets is that
3036 it sometimes sets some section indices to zero for sections that,
3037 in fact do not exist. See the body of default_symfile_offsets
3038 for more info on when that happens. Undo that, as this then allows
3039 us to test whether the associated section exists or not, and then
3040 access it quickly (without searching it again). */
3042 if (objfile
->num_sections
== 0)
3043 return; /* Is that even possible? Better safe than sorry. */
3046 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3048 if (objfile
->sect_index_text
== 0
3049 && strcmp (first_section_name
, ".text") != 0)
3050 objfile
->sect_index_text
= -1;
3052 if (objfile
->sect_index_data
== 0
3053 && strcmp (first_section_name
, ".data") != 0)
3054 objfile
->sect_index_data
= -1;
3056 if (objfile
->sect_index_bss
== 0
3057 && strcmp (first_section_name
, ".bss") != 0)
3058 objfile
->sect_index_bss
= -1;
3060 if (objfile
->sect_index_rodata
== 0
3061 && strcmp (first_section_name
, ".rodata") != 0)
3062 objfile
->sect_index_rodata
= -1;
3065 /* Register our ability to parse symbols for xcoff BFD files. */
3067 static const struct sym_fns xcoff_sym_fns
=
3070 /* It is possible that coff and xcoff should be merged as
3071 they do have fundamental similarities (for example, the extra storage
3072 classes used for stabs could presumably be recognized in any COFF file).
3073 However, in addition to obvious things like all the csect hair, there are
3074 some subtler differences between xcoffread.c and coffread.c, notably
3075 the fact that coffread.c has no need to read in all the symbols, but
3076 xcoffread.c reads all the symbols and does in fact randomly access them
3077 (in C_BSTAT and line number processing). */
3079 xcoff_new_init
, /* init anything gbl to entire symtab */
3080 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3081 xcoff_initial_scan
, /* read a symbol file into symtab */
3082 NULL
, /* sym_read_psymbols */
3083 xcoff_symfile_finish
, /* finished with file, cleanup */
3084 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3085 default_symfile_segments
, /* Get segment information from a file. */
3086 aix_process_linenos
,
3087 default_symfile_relocate
, /* Relocate a debug section. */
3088 NULL
, /* sym_probe_fns */
3092 /* Same as xcoff_get_n_import_files, but for core files. */
3095 xcoff_get_core_n_import_files (bfd
*abfd
)
3097 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3099 file_ptr offset
= 0;
3103 return -1; /* Not a core file. */
3105 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3111 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3113 next
= bfd_get_32 (abfd
, buf
);
3115 break; /* This is the last entry. */
3119 /* Return the number of entries, excluding the first one, which is
3120 the path to the executable that produced this core file. */
3121 return n_entries
- 1;
3124 /* Return the number of import files (shared libraries) that the given
3125 BFD depends on. Return -1 if this number could not be computed. */
3128 xcoff_get_n_import_files (bfd
*abfd
)
3130 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3134 /* If the ".loader" section does not exist, the objfile is probably
3135 not an executable. Might be a core file... */
3137 return xcoff_get_core_n_import_files (abfd
);
3139 /* The number of entries in the Import Files Table is stored in
3140 field l_nimpid. This field is always at offset 16, and is
3141 always 4 bytes long. Read those 4 bytes. */
3143 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3145 l_nimpid
= bfd_get_32 (abfd
, buf
);
3147 /* By convention, the first entry is the default LIBPATH value
3148 to be used by the system loader, so it does not count towards
3149 the number of import files. */
3150 return l_nimpid
- 1;
3153 /* Free the per-objfile xcoff data. */
3156 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3161 /* Provide a prototype to silence -Wmissing-prototypes. */
3162 extern initialize_file_ftype _initialize_xcoffread
;
3165 _initialize_xcoffread (void)
3167 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3169 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,