1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2017 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
32 #include "coff/internal.h"
33 #include "libcoff.h" /* FIXME, internal data from BFD */
34 #include "coff/xcoff.h"
36 #include "coff/rs6000.h"
37 #include "xcoffread.h"
41 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "stabsread.h"
46 #include "expression.h"
47 #include "complaints.h"
50 #include "gdb-stabs.h"
52 /* For interface with stabsread.c. */
53 #include "aout/stab_gnu.h"
56 /* Key for XCOFF-associated data. */
58 static const struct objfile_data
*xcoff_objfile_data_key
;
60 /* We put a pointer to this structure in the read_symtab_private field
66 /* First symbol number for this file. */
70 /* Number of symbols in the section of the symbol table devoted to
71 this file's symbols (actually, the section bracketed may contain
72 more than just this file's symbols). If numsyms is 0, the only
73 reason for this thing's existence is the dependency list. Nothing
74 else will happen when it is read in. */
78 /* Position of the start of the line number information for this
80 unsigned int lineno_off
;
83 /* Remember what we deduced to be the source language of this psymtab. */
85 static enum language psymtab_language
= language_unknown
;
88 /* Simplified internal version of coff symbol table information. */
93 int c_symnum
; /* Symbol number of this entry. */
94 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
96 unsigned char c_sclass
;
101 /* Last function's saved coff symbol `cs'. */
103 static struct coff_symbol fcn_cs_saved
;
105 static bfd
*symfile_bfd
;
107 /* Core address of start and end of text of current source file.
108 This is calculated from the first function seen after a C_FILE
112 static CORE_ADDR cur_src_end_addr
;
114 /* Core address of the end of the first object file. */
116 static CORE_ADDR first_object_file_end
;
118 /* Initial symbol-table-debug-string vector length. */
120 #define INITIAL_STABVECTOR_LENGTH 40
122 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
123 there is any reason not to just use a #define, but might as well
124 ask BFD for the size and store it here, I guess. */
126 static unsigned local_symesz
;
128 struct coff_symfile_info
130 file_ptr min_lineno_offset
; /* Where in file lowest line#s are. */
131 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file. */
133 /* Pointer to the string table. */
136 /* Pointer to debug section. */
139 /* Pointer to the a.out symbol table. */
142 /* Number of symbols in symtbl. */
145 /* Offset in data section to TOC anchor. */
146 CORE_ADDR toc_offset
;
149 /* Convenience macro to access the per-objfile XCOFF data. */
151 #define XCOFF_DATA(objfile) \
152 ((struct coff_symfile_info *) objfile_data ((objfile), \
153 xcoff_objfile_data_key))
155 /* XCOFF names for dwarf sections. There is no compressed sections. */
157 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
159 { ".dwabrev", NULL
},
162 { NULL
, NULL
}, /* debug_loclists */
163 /* AIX XCOFF defines one, named DWARF section for macro debug information.
164 XLC does not generate debug_macinfo for DWARF4 and below.
165 The section is assigned to debug_macro for DWARF5 and above. */
169 { NULL
, NULL
}, /* debug_line_str */
170 { ".dwrnges", NULL
},
171 { NULL
, NULL
}, /* debug_rnglists */
172 { ".dwpbtyp", NULL
},
173 { NULL
, NULL
}, /* debug_addr */
174 { ".dwframe", NULL
},
175 { NULL
, NULL
}, /* eh_frame */
176 { NULL
, NULL
}, /* gdb_index */
181 bf_notfound_complaint (void)
183 complaint (&symfile_complaints
,
184 _("line numbers off, `.bf' symbol not found"));
188 ef_complaint (int arg1
)
190 complaint (&symfile_complaints
,
191 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
195 eb_complaint (int arg1
)
197 complaint (&symfile_complaints
,
198 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
201 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
203 static void scan_xcoff_symtab (minimal_symbol_reader
&,
206 static char *xcoff_next_symbol_text (struct objfile
*);
208 static void record_include_begin (struct coff_symbol
*);
211 enter_line_range (struct subfile
*, unsigned, unsigned,
212 CORE_ADDR
, CORE_ADDR
, unsigned *);
214 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
216 static void xcoff_symfile_init (struct objfile
*);
218 static void xcoff_new_init (struct objfile
*);
220 static void xcoff_symfile_finish (struct objfile
*);
222 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
224 static void read_symbol (struct internal_syment
*, int);
226 static int read_symbol_lineno (int);
228 static CORE_ADDR
read_symbol_nvalue (int);
230 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
233 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
236 static void add_stab_to_list (char *, struct pending_stabs
**);
239 static int compare_lte (const void *, const void *);
241 static struct linetable
*arrange_linetable (struct linetable
*);
243 static void record_include_end (struct coff_symbol
*);
245 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
248 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
250 static int secnum_to_section (int, struct objfile
*);
251 static asection
*secnum_to_bfd_section (int, struct objfile
*);
253 struct find_targ_sec_arg
258 struct objfile
*objfile
;
261 static void find_targ_sec (bfd
*, asection
*, void *);
264 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
266 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
267 struct objfile
*objfile
= args
->objfile
;
269 if (sect
->target_index
== args
->targ_index
)
271 /* This is the section. Figure out what SECT_OFF_* code it is. */
272 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
273 *args
->resultp
= SECT_OFF_TEXT (objfile
);
274 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
275 *args
->resultp
= SECT_OFF_DATA (objfile
);
277 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
278 *args
->bfd_sect
= sect
;
282 /* Search all BFD sections for the section whose target_index is
283 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
284 associated index in the objfile's section_offset table is also
287 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
288 is set to the text section's number. */
291 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
292 asection
**bfd_sect
, int *secnum
)
294 struct find_targ_sec_arg args
;
296 args
.targ_index
= n_scnum
;
297 args
.resultp
= secnum
;
298 args
.bfd_sect
= bfd_sect
;
299 args
.objfile
= objfile
;
302 *secnum
= SECT_OFF_TEXT (objfile
);
304 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
307 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
310 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
315 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
319 /* Return the BFD section that N_SCNUM points to. */
322 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
327 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
331 /* add a given stab string into given stab vector. */
336 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
338 if (*stabvector
== NULL
)
340 *stabvector
= (struct pending_stabs
*)
341 xmalloc (sizeof (struct pending_stabs
) +
342 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
343 (*stabvector
)->count
= 0;
344 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
346 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
348 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
349 *stabvector
= (struct pending_stabs
*)
350 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
351 (*stabvector
)->length
* sizeof (char *));
353 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
358 /* Linenos are processed on a file-by-file basis.
362 1) xlc (IBM's native c compiler) postpones static function code
363 emission to the end of a compilation unit. This way it can
364 determine if those functions (statics) are needed or not, and
365 can do some garbage collection (I think). This makes line
366 numbers and corresponding addresses unordered, and we end up
367 with a line table like:
384 and that breaks gdb's binary search on line numbers, if the
385 above table is not sorted on line numbers. And that sort
386 should be on function based, since gcc can emit line numbers
389 10 0x100 - for the init/test part of a for stmt.
392 10 0x400 - for the increment part of a for stmt.
394 arrange_linetable() will do this sorting.
396 2) aix symbol table might look like:
398 c_file // beginning of a new file
399 .bi // beginning of include file
400 .ei // end of include file
404 basically, .bi/.ei pairs do not necessarily encapsulate
405 their scope. They need to be recorded, and processed later
406 on when we come the end of the compilation unit.
407 Include table (inclTable) and process_linenos() handle
413 /* compare line table entry addresses. */
416 compare_lte (const void *lte1p
, const void *lte2p
)
418 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
419 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
421 return lte1
->pc
- lte2
->pc
;
424 /* Given a line table with function entries are marked, arrange its
425 functions in ascending order and strip off function entry markers
426 and return it in a newly created table. If the old one is good
427 enough, return the old one. */
428 /* FIXME: I think all this stuff can be replaced by just passing
429 sort_linevec = 1 to end_symtab. */
431 static struct linetable
*
432 arrange_linetable (struct linetable
*oldLineTb
)
434 int ii
, jj
, newline
, /* new line count */
435 function_count
; /* # of functions */
437 struct linetable_entry
*fentry
; /* function entry vector */
438 int fentry_size
; /* # of function entries */
439 struct linetable
*newLineTb
; /* new line table */
442 #define NUM_OF_FUNCTIONS 20
444 fentry_size
= NUM_OF_FUNCTIONS
;
445 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
447 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
449 if (oldLineTb
->item
[ii
].line
== 0)
450 { /* Function entry found. */
451 if (function_count
>= fentry_size
)
452 { /* Make sure you have room. */
454 fentry
= (struct linetable_entry
*)
456 fentry_size
* sizeof (struct linetable_entry
));
458 fentry
[function_count
].line
= ii
;
459 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
462 /* If the function was compiled with XLC, we may have to add an
463 extra line entry later. Reserve space for that. */
464 if (ii
+ 1 < oldLineTb
->nitems
465 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
470 if (function_count
== 0)
475 else if (function_count
> 1)
476 qsort (fentry
, function_count
,
477 sizeof (struct linetable_entry
), compare_lte
);
479 /* Allocate a new line table. */
480 newLineTb
= (struct linetable
*)
482 (sizeof (struct linetable
) +
483 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
485 /* If line table does not start with a function beginning, copy up until
489 if (oldLineTb
->item
[0].line
!= 0)
491 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
492 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
494 /* Now copy function lines one by one. */
496 for (ii
= 0; ii
< function_count
; ++ii
)
498 /* If the function was compiled with XLC, we may have to add an
499 extra line to cover the function prologue. */
500 jj
= fentry
[ii
].line
;
501 if (jj
+ 1 < oldLineTb
->nitems
502 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
504 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
505 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
509 for (jj
= fentry
[ii
].line
+ 1;
510 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
512 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
515 /* The number of items in the line table must include these
516 extra lines which were added in case of XLC compiled functions. */
517 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
521 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
522 following `IncludeChain'. At the end of each symtab (end_symtab),
523 we will determine if we should create additional symtab's to
524 represent if (the include files. */
527 typedef struct _inclTable
529 char *name
; /* include filename */
531 /* Offsets to the line table. end points to the last entry which is
532 part of this include file. */
535 struct subfile
*subfile
;
536 unsigned funStartLine
; /* Start line # of its function. */
540 #define INITIAL_INCLUDE_TABLE_LENGTH 20
541 static InclTable
*inclTable
; /* global include table */
542 static int inclIndx
; /* last entry to table */
543 static int inclLength
; /* table length */
544 static int inclDepth
; /* nested include depth */
546 static void allocate_include_entry (void);
549 record_include_begin (struct coff_symbol
*cs
)
553 /* In xcoff, we assume include files cannot be nested (not in .c files
554 of course, but in corresponding .s files.). */
556 /* This can happen with old versions of GCC.
557 GCC 2.3.3-930426 does not exhibit this on a test case which
558 a user said produced the message for him. */
559 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
563 allocate_include_entry ();
565 inclTable
[inclIndx
].name
= cs
->c_name
;
566 inclTable
[inclIndx
].begin
= cs
->c_value
;
570 record_include_end (struct coff_symbol
*cs
)
576 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
579 allocate_include_entry ();
581 pTbl
= &inclTable
[inclIndx
];
582 pTbl
->end
= cs
->c_value
;
589 allocate_include_entry (void)
591 if (inclTable
== NULL
)
593 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
594 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
597 else if (inclIndx
>= inclLength
)
599 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
600 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
601 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
602 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
606 /* Global variable to pass the psymtab down to all the routines involved
607 in psymtab to symtab processing. */
608 static struct partial_symtab
*this_symtab_psymtab
;
610 /* Objfile related to this_symtab_psymtab; set at the same time. */
611 static struct objfile
*this_symtab_objfile
;
613 /* given the start and end addresses of a compilation unit (or a csect,
614 at times) process its lines and create appropriate line vectors. */
617 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
621 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
623 /* subfile structure for the main compilation unit. */
624 struct subfile main_subfile
;
626 /* In the main source file, any time we see a function entry, we
627 reset this variable to function's absolute starting line number.
628 All the following line numbers in the function are relative to
629 this, and we record absolute line numbers in record_line(). */
631 unsigned int main_source_baseline
= 0;
636 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
638 goto return_after_cleanup
;
640 memset (&main_subfile
, '\0', sizeof (main_subfile
));
643 /* All source lines were in the main source file. None in include
646 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
647 &main_source_baseline
);
651 /* There was source with line numbers in include files. */
654 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
655 main_source_baseline
= 0;
657 for (ii
= 0; ii
< inclIndx
; ++ii
)
659 struct subfile
*tmpSubfile
;
661 /* If there is main file source before include file, enter it. */
662 if (offset
< inclTable
[ii
].begin
)
665 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
666 start
, 0, &main_source_baseline
);
669 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
671 /* The entry in the include table refers to the main source
672 file. Add the lines to the main subfile. */
674 main_source_baseline
= inclTable
[ii
].funStartLine
;
676 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
677 start
, 0, &main_source_baseline
);
678 inclTable
[ii
].subfile
= &main_subfile
;
682 /* Have a new subfile for the include file. */
684 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
686 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
687 firstLine
= &(inclTable
[ii
].funStartLine
);
689 /* Enter include file's lines now. */
690 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
691 inclTable
[ii
].end
, start
, 0, firstLine
);
694 if (offset
<= inclTable
[ii
].end
)
695 offset
= inclTable
[ii
].end
+ linesz
;
698 /* All the include files' line have been processed at this point. Now,
699 enter remaining lines of the main file, if any left. */
700 if (offset
< max_offset
+ 1 - linesz
)
702 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
703 &main_source_baseline
);
707 /* Process main file's line numbers. */
708 if (main_subfile
.line_vector
)
710 struct linetable
*lineTb
, *lv
;
712 lv
= main_subfile
.line_vector
;
714 /* Line numbers are not necessarily ordered. xlc compilation will
715 put static function to the end. */
717 lineTb
= arrange_linetable (lv
);
720 current_subfile
->line_vector
= (struct linetable
*)
721 xrealloc (lv
, (sizeof (struct linetable
)
722 + lv
->nitems
* sizeof (struct linetable_entry
)));
727 current_subfile
->line_vector
= lineTb
;
730 current_subfile
->line_vector_length
=
731 current_subfile
->line_vector
->nitems
;
734 /* Now, process included files' line numbers. */
736 for (ii
= 0; ii
< inclIndx
; ++ii
)
738 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
739 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
742 struct linetable
*lineTb
, *lv
;
744 lv
= (inclTable
[ii
].subfile
)->line_vector
;
746 /* Line numbers are not necessarily ordered. xlc compilation will
747 put static function to the end. */
749 lineTb
= arrange_linetable (lv
);
753 /* For the same include file, we might want to have more than one
754 subfile. This happens if we have something like:
762 while foo.h including code in it. (stupid but possible)
763 Since start_subfile() looks at the name and uses an
764 existing one if finds, we need to provide a fake name and
768 start_subfile (inclTable
[ii
].name
);
771 /* Pick a fake name that will produce the same results as this
772 one when passed to deduce_language_from_filename. Kludge on
774 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
776 if (fakename
== NULL
)
778 start_subfile (fakename
);
779 xfree (current_subfile
->name
);
781 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
786 current_subfile
->line_vector
=
787 (struct linetable
*) xrealloc
788 (lv
, (sizeof (struct linetable
)
789 + lv
->nitems
* sizeof (struct linetable_entry
)));
795 current_subfile
->line_vector
= lineTb
;
798 current_subfile
->line_vector_length
=
799 current_subfile
->line_vector
->nitems
;
800 start_subfile (pop_subfile ());
804 return_after_cleanup
:
806 /* We don't want to keep alloc/free'ing the global include file table. */
811 aix_process_linenos (struct objfile
*objfile
)
813 /* There is no linenos to read if there are only dwarf info. */
814 if (this_symtab_psymtab
== NULL
)
817 /* Process line numbers and enter them into line vector. */
818 process_linenos (last_source_start_addr
, cur_src_end_addr
);
822 /* Enter a given range of lines into the line vector.
823 can be called in the following two ways:
824 enter_line_range (subfile, beginoffset, endoffset,
825 startaddr, 0, firstLine) or
826 enter_line_range (subfile, beginoffset, 0,
827 startaddr, endaddr, firstLine)
829 endoffset points to the last line table entry that we should pay
833 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
834 unsigned endoffset
, /* offsets to line table */
835 CORE_ADDR startaddr
, /* offsets to line table */
836 CORE_ADDR endaddr
, unsigned *firstLine
)
838 struct objfile
*objfile
= this_symtab_objfile
;
839 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
840 unsigned int curoffset
;
843 struct internal_lineno int_lnno
;
844 unsigned int limit_offset
;
848 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
850 curoffset
= beginoffset
;
851 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
855 if (endoffset
>= limit_offset
)
857 complaint (&symfile_complaints
,
858 _("Bad line table offset in C_EINCL directive"));
861 limit_offset
= endoffset
;
866 abfd
= objfile
->obfd
;
867 linesz
= coff_data (abfd
)->local_linesz
;
868 ext_lnno
= alloca (linesz
);
870 while (curoffset
<= limit_offset
)
872 bfd_seek (abfd
, curoffset
, SEEK_SET
);
873 bfd_bread (ext_lnno
, linesz
, abfd
);
874 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
876 /* Find the address this line represents. */
877 addr
= (int_lnno
.l_lnno
878 ? int_lnno
.l_addr
.l_paddr
879 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
880 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
882 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
885 if (int_lnno
.l_lnno
== 0)
887 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
888 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
892 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
893 gdbarch_addr_bits_remove (gdbarch
, addr
));
899 /* Save the vital information for use when closing off the current file.
900 NAME is the file name the symbols came from, START_ADDR is the first
901 text address for the file, and SIZE is the number of bytes of text. */
903 #define complete_symtab(name, start_addr) { \
904 set_last_source_file (name); \
905 last_source_start_addr = start_addr; \
909 /* Refill the symbol table input buffer
910 and set the variables that control fetching entries from it.
911 Reports an error if no data available.
912 This function can read past the end of the symbol table
913 (into the string table) but this does no harm. */
915 /* Create a new minimal symbol (using record_with_info).
917 Creation of all new minimal symbols should go through this function
918 rather than calling the various record functions in order
919 to make sure that all symbol addresses get properly relocated.
923 NAME - the symbol's name (but if NAME starts with a period, that
924 leading period is discarded).
925 ADDRESS - the symbol's address, prior to relocation. This function
926 relocates the address before recording the minimal symbol.
927 MS_TYPE - the symbol's type.
928 N_SCNUM - the symbol's XCOFF section number.
929 OBJFILE - the objfile associated with the minimal symbol. */
932 record_minimal_symbol (minimal_symbol_reader
&reader
,
933 const char *name
, CORE_ADDR address
,
934 enum minimal_symbol_type ms_type
,
936 struct objfile
*objfile
)
941 reader
.record_with_info (name
, address
, ms_type
,
942 secnum_to_section (n_scnum
, objfile
));
945 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
946 nested. At any given time, a symbol can only be in one static block.
947 This is the base address of current static block, zero if non exists. */
949 static int static_block_base
= 0;
951 /* Section number for the current static block. */
953 static int static_block_section
= -1;
955 /* true if space for symbol name has been allocated. */
957 static int symname_alloced
= 0;
959 /* Next symbol to read. Pointer into raw seething symbol table. */
961 static char *raw_symbol
;
963 /* This is the function which stabsread.c calls to get symbol
967 xcoff_next_symbol_text (struct objfile
*objfile
)
969 struct internal_syment symbol
;
972 /* FIXME: is this the same as the passed arg? */
973 if (this_symtab_objfile
)
974 objfile
= this_symtab_objfile
;
976 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
979 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
981 /* Return something which points to '\0' and hope the symbol reading
982 code does something reasonable. */
985 else if (symbol
.n_sclass
& 0x80)
987 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
988 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
993 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
995 /* Return something which points to '\0' and hope the symbol reading
996 code does something reasonable. */
1002 /* Read symbols for a given partial symbol table. */
1005 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1007 bfd
*abfd
= objfile
->obfd
;
1008 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1009 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1010 char *strtbl
= xcoff
->strtbl
;
1011 char *debugsec
= xcoff
->debugsec
;
1012 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1014 struct internal_syment symbol
[1];
1015 union internal_auxent main_aux
;
1016 struct coff_symbol cs
[1];
1017 CORE_ADDR file_start_addr
= 0;
1018 CORE_ADDR file_end_addr
= 0;
1020 int next_file_symnum
= -1;
1021 unsigned int max_symnum
;
1022 int just_started
= 1;
1024 CORE_ADDR fcn_start_addr
= 0;
1026 struct coff_symbol fcn_stab_saved
= { 0 };
1028 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1029 union internal_auxent fcn_aux_saved
= main_aux
;
1030 struct context_stack
*newobj
;
1032 const char *filestring
= pst
->filename
; /* Name of the current file. */
1034 const char *last_csect_name
; /* Last seen csect's name. */
1036 this_symtab_psymtab
= pst
;
1037 this_symtab_objfile
= objfile
;
1039 /* Get the appropriate COFF "constants" related to the file we're
1041 local_symesz
= coff_data (abfd
)->local_symesz
;
1043 set_last_source_file (NULL
);
1044 last_csect_name
= 0;
1047 start_symtab (objfile
, filestring
, (char *) NULL
, file_start_addr
);
1048 record_debugformat (debugfmt
);
1049 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1051 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1052 first_object_file_end
= 0;
1054 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1056 while (symnum
< max_symnum
)
1058 QUIT
; /* make this command interruptable. */
1060 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1061 /* read one symbol into `cs' structure. After processing the
1062 whole symbol table, only string table will be kept in memory,
1063 symbol table and debug section of xcoff will be freed. Thus
1064 we can mark symbols with names in string table as
1069 /* Swap and align the symbol into a reasonable C structure. */
1070 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1072 cs
->c_symnum
= symnum
;
1073 cs
->c_naux
= symbol
->n_numaux
;
1074 if (symbol
->n_zeroes
)
1076 symname_alloced
= 0;
1077 /* We must use the original, unswapped, name here so the name field
1078 pointed to by cs->c_name will persist throughout xcoffread. If
1079 we use the new field, it gets overwritten for each symbol. */
1080 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1081 /* If it's exactly E_SYMNMLEN characters long it isn't
1083 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1087 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1089 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1090 p
[E_SYMNMLEN
] = '\0';
1092 symname_alloced
= 1;
1095 else if (symbol
->n_sclass
& 0x80)
1097 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1098 symname_alloced
= 0;
1102 /* in string table */
1103 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1104 symname_alloced
= 1;
1106 cs
->c_value
= symbol
->n_value
;
1107 cs
->c_sclass
= symbol
->n_sclass
;
1108 cs
->c_secnum
= symbol
->n_scnum
;
1109 cs
->c_type
= (unsigned) symbol
->n_type
;
1111 raw_symbol
+= local_symesz
;
1114 /* Save addr of first aux entry. */
1115 raw_auxptr
= raw_symbol
;
1117 /* Skip all the auxents associated with this symbol. */
1118 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1120 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1125 /* if symbol name starts with ".$" or "$", ignore it. */
1126 if (cs
->c_name
[0] == '$'
1127 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1130 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1132 if (get_last_source_file ())
1134 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1135 SECT_OFF_TEXT (objfile
));
1140 start_symtab (objfile
, "_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1141 record_debugformat (debugfmt
);
1142 cur_src_end_addr
= first_object_file_end
;
1143 /* Done with all files, everything from here on is globals. */
1146 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1149 /* Dealing with a symbol with a csect entry. */
1151 #define CSECT(PP) ((PP)->x_csect)
1152 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1153 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1154 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1155 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1157 /* Convert the auxent to something we can access. */
1158 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1159 0, cs
->c_naux
, &main_aux
);
1161 switch (CSECT_SMTYP (&main_aux
))
1165 /* Ignore all external references. */
1169 /* A section description. */
1171 switch (CSECT_SCLAS (&main_aux
))
1177 /* A program csect is seen. We have to allocate one
1178 symbol table for each program csect. Normally gdb
1179 prefers one symtab for each source file. In case
1180 of AIX, one source file might include more than one
1181 [PR] csect, and they don't have to be adjacent in
1182 terms of the space they occupy in memory. Thus, one
1183 single source file might get fragmented in the
1184 memory and gdb's file start and end address
1185 approach does not work! GCC (and I think xlc) seem
1186 to put all the code in the unnamed program csect. */
1188 if (last_csect_name
)
1190 complete_symtab (filestring
, file_start_addr
);
1191 cur_src_end_addr
= file_end_addr
;
1192 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1195 /* Give all csects for this source file the same
1197 start_symtab (objfile
, filestring
, NULL
,
1199 record_debugformat (debugfmt
);
1202 /* If this is the very first csect seen,
1203 basically `__start'. */
1206 first_object_file_end
1207 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1212 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1213 SECT_OFF_TEXT (objfile
));
1214 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1216 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1217 last_csect_name
= cs
->c_name
;
1221 /* All other symbols are put into the minimal symbol
1234 /* Ignore the symbol. */
1242 switch (CSECT_SCLAS (&main_aux
))
1245 /* a function entry point. */
1246 function_entry_point
:
1248 fcn_start_addr
= cs
->c_value
;
1250 /* save the function header info, which will be used
1251 when `.bf' is seen. */
1253 fcn_aux_saved
= main_aux
;
1257 /* shared library function trampoline code entry point. */
1261 /* The symbols often have the same names as debug symbols for
1262 functions, and confuse lookup_symbol. */
1266 /* xlc puts each variable in a separate csect, so we get
1267 an XTY_SD for each variable. But gcc puts several
1268 variables in a csect, so that each variable only gets
1269 an XTY_LD. This will typically be XMC_RW; I suspect
1270 XMC_RO and XMC_BS might be possible too.
1271 These variables are put in the minimal symbol table
1278 /* Common symbols are put into the minimal symbol table only. */
1286 /* If explicitly specified as a function, treat is as one. This check
1287 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1288 after the above CSECT check. */
1289 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1291 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1292 0, cs
->c_naux
, &main_aux
);
1293 goto function_entry_point
;
1296 switch (cs
->c_sclass
)
1300 /* c_value field contains symnum of next .file entry in table
1301 or symnum of first global after last .file. */
1303 next_file_symnum
= cs
->c_value
;
1305 /* Complete symbol table for last object file containing
1306 debugging information. */
1308 /* Whether or not there was a csect in the previous file, we
1309 have to call `end_stabs' and `start_stabs' to reset
1310 type_vector, line_vector, etc. structures. */
1312 complete_symtab (filestring
, file_start_addr
);
1313 cur_src_end_addr
= file_end_addr
;
1314 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1317 /* XCOFF, according to the AIX 3.2 documentation, puts the
1318 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1319 do things the standard COFF way and put it in the auxent.
1320 We use the auxent if the symbol is ".file" and an auxent
1321 exists, otherwise use the symbol itself. Simple
1323 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1325 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1326 0, cs
->c_naux
, &main_aux
);
1327 filestring
= coff_getfilename (&main_aux
, objfile
);
1330 filestring
= cs
->c_name
;
1333 start_symtab (objfile
, filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1334 record_debugformat (debugfmt
);
1335 last_csect_name
= 0;
1337 /* reset file start and end addresses. A compilation unit
1338 with no text (only data) should have zero file
1340 file_start_addr
= file_end_addr
= 0;
1344 fcn_stab_saved
= *cs
;
1348 if (strcmp (cs
->c_name
, ".bf") == 0)
1350 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1351 SECT_OFF_TEXT (objfile
));
1353 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1354 0, cs
->c_naux
, &main_aux
);
1356 within_function
= 1;
1358 newobj
= push_context (0, fcn_start_addr
+ off
);
1360 newobj
->name
= define_symbol
1361 (fcn_cs_saved
.c_value
+ off
,
1362 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1363 if (newobj
->name
!= NULL
)
1364 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1366 else if (strcmp (cs
->c_name
, ".ef") == 0)
1368 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1369 0, cs
->c_naux
, &main_aux
);
1371 /* The value of .ef is the address of epilogue code;
1372 not useful for gdb. */
1373 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1374 contains number of lines to '}' */
1376 if (context_stack_depth
<= 0)
1377 { /* We attempted to pop an empty context stack. */
1378 ef_complaint (cs
->c_symnum
);
1379 within_function
= 0;
1382 newobj
= pop_context ();
1383 /* Stack must be empty now. */
1384 if (context_stack_depth
> 0 || newobj
== NULL
)
1386 ef_complaint (cs
->c_symnum
);
1387 within_function
= 0;
1391 finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
1392 NULL
, newobj
->start_addr
,
1393 (fcn_cs_saved
.c_value
1394 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1395 + ANOFFSET (objfile
->section_offsets
,
1396 SECT_OFF_TEXT (objfile
))));
1397 within_function
= 0;
1402 /* Begin static block. */
1404 struct internal_syment symbol
;
1406 read_symbol (&symbol
, cs
->c_value
);
1407 static_block_base
= symbol
.n_value
;
1408 static_block_section
=
1409 secnum_to_section (symbol
.n_scnum
, objfile
);
1414 /* End of static block. */
1415 static_block_base
= 0;
1416 static_block_section
= -1;
1427 complaint (&symfile_complaints
,
1428 _("Unrecognized storage class %d."),
1443 /* beginning of include file */
1444 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1445 order. Thus, when wee see them, we might not know enough info
1446 to process them. Thus, we'll be saving them into a table
1447 (inclTable) and postpone their processing. */
1449 record_include_begin (cs
);
1453 /* End of include file. */
1454 /* See the comment after case C_BINCL. */
1455 record_include_end (cs
);
1459 if (strcmp (cs
->c_name
, ".bb") == 0)
1462 newobj
= push_context (depth
,
1464 + ANOFFSET (objfile
->section_offsets
,
1465 SECT_OFF_TEXT (objfile
))));
1467 else if (strcmp (cs
->c_name
, ".eb") == 0)
1469 if (context_stack_depth
<= 0)
1470 { /* We attempted to pop an empty context stack. */
1471 eb_complaint (cs
->c_symnum
);
1474 newobj
= pop_context ();
1475 if (depth
-- != newobj
->depth
)
1477 eb_complaint (cs
->c_symnum
);
1480 if (local_symbols
&& context_stack_depth
> 0)
1482 /* Make a block for the local symbols within. */
1483 finish_block (newobj
->name
, &local_symbols
,
1484 newobj
->old_blocks
, NULL
,
1487 + ANOFFSET (objfile
->section_offsets
,
1488 SECT_OFF_TEXT (objfile
))));
1490 local_symbols
= newobj
->locals
;
1495 process_xcoff_symbol (cs
, objfile
);
1500 if (get_last_source_file ())
1502 struct compunit_symtab
*cust
;
1504 complete_symtab (filestring
, file_start_addr
);
1505 cur_src_end_addr
= file_end_addr
;
1506 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1507 /* When reading symbols for the last C_FILE of the objfile, try
1508 to make sure that we set pst->compunit_symtab to the symtab for the
1509 file, not to the _globals_ symtab. I'm not sure whether this
1510 actually works right or when/if it comes up. */
1511 if (pst
->compunit_symtab
== NULL
)
1512 pst
->compunit_symtab
= cust
;
1517 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1518 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1519 *(SYMBOL2) = *(SYMBOL1);
1522 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1523 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1524 (NAME), strlen (NAME)))
1527 /* process one xcoff symbol. */
1529 static struct symbol
*
1530 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1532 struct symbol onesymbol
;
1533 struct symbol
*sym
= &onesymbol
;
1534 struct symbol
*sym2
= NULL
;
1540 if (cs
->c_secnum
< 0)
1542 /* The value is a register number, offset within a frame, etc.,
1543 and does not get relocated. */
1549 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1550 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1557 initialize_objfile_symbol (sym
);
1559 /* default assumptions */
1560 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1561 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1562 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1564 if (ISFCN (cs
->c_type
))
1566 /* At this point, we don't know the type of the function. This
1567 will be patched with the type from its stab entry later on in
1568 patch_block_stabs (), unless the file was compiled without -g. */
1570 SYMBOL_SET_LINKAGE_NAME (sym
, ((const char *)
1571 SYMNAME_ALLOC (name
, symname_alloced
)));
1572 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1574 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1575 SYMBOL_DUP (sym
, sym2
);
1577 if (cs
->c_sclass
== C_EXT
)
1578 add_symbol_to_list (sym2
, &global_symbols
);
1579 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1580 add_symbol_to_list (sym2
, &file_symbols
);
1584 /* In case we can't figure out the type, provide default. */
1585 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1587 switch (cs
->c_sclass
)
1590 /* The values of functions and global symbols are now resolved
1591 via the global_sym_chain in stabsread.c. */
1593 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1594 add_stab_to_list (name
, &global_stabs
);
1596 add_stab_to_list (name
, &file_stabs
);
1600 add_stab_to_list (name
, &global_stabs
);
1605 common_block_start (cs
->c_name
, objfile
);
1609 common_block_end (objfile
);
1613 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1626 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1629 SYMBOL_SECTION (sym
) = sec
;
1636 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1637 all statics and we need to distinguish file-scope versus
1638 function-scope using within_function. We do this by
1639 changing the string we pass to define_symbol to use 'S'
1640 where we need to, which is not necessarily super-clean,
1641 but seems workable enough. */
1646 pp
= strchr (name
, ':');
1651 if (*pp
== 'V' && !within_function
)
1653 sym
= define_symbol ((cs
->c_value
1654 + ANOFFSET (objfile
->section_offsets
,
1655 static_block_section
)),
1656 cs
->c_name
, 0, 0, objfile
);
1659 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1660 SYMBOL_SECTION (sym
) = static_block_section
;
1669 /* Extract the file name from the aux entry of a C_FILE symbol.
1670 Result is in static storage and is only good for temporary use. */
1673 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1675 static char buffer
[BUFSIZ
];
1677 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1678 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1679 + aux_entry
->x_file
.x_n
.x_offset
));
1682 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1683 buffer
[FILNMLEN
] = '\0';
1688 /* Set *SYMBOL to symbol number symno in symtbl. */
1690 read_symbol (struct internal_syment
*symbol
, int symno
)
1692 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1693 int nsyms
= xcoff
->symtbl_num_syms
;
1694 char *stbl
= xcoff
->symtbl
;
1696 if (symno
< 0 || symno
>= nsyms
)
1698 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1699 symbol
->n_value
= 0;
1700 symbol
->n_scnum
= -1;
1703 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1704 stbl
+ (symno
* local_symesz
),
1708 /* Get value corresponding to symbol number symno in symtbl. */
1711 read_symbol_nvalue (int symno
)
1713 struct internal_syment symbol
[1];
1715 read_symbol (symbol
, symno
);
1716 return symbol
->n_value
;
1720 /* Find the address of the function corresponding to symno, where
1721 symno is the symbol pointed to by the linetable. */
1724 read_symbol_lineno (int symno
)
1726 struct objfile
*objfile
= this_symtab_objfile
;
1727 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1729 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1730 int nsyms
= info
->symtbl_num_syms
;
1731 char *stbl
= info
->symtbl
;
1732 char *strtbl
= info
->strtbl
;
1734 struct internal_syment symbol
[1];
1735 union internal_auxent main_aux
[1];
1739 bf_notfound_complaint ();
1743 /* Note that just searching for a short distance (e.g. 50 symbols)
1744 is not enough, at least in the following case.
1747 [many .stabx entries]
1748 [a few functions, referring to foo]
1752 What happens here is that the assembler moves the .stabx entries
1753 to right before the ".bf" for foo, but the symbol for "foo" is before
1754 all the stabx entries. See PR gdb/2222. */
1756 /* Maintaining a table of .bf entries might be preferable to this search.
1757 If I understand things correctly it would need to be done only for
1758 the duration of a single psymtab to symtab conversion. */
1759 while (symno
< nsyms
)
1761 bfd_coff_swap_sym_in (symfile_bfd
,
1762 stbl
+ (symno
* local_symesz
), symbol
);
1763 if (symbol
->n_sclass
== C_FCN
)
1765 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1767 if (strcmp (name
, ".bf") == 0)
1770 symno
+= symbol
->n_numaux
+ 1;
1773 bf_notfound_complaint ();
1777 /* Take aux entry and return its lineno. */
1779 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1780 symbol
->n_type
, symbol
->n_sclass
,
1781 0, symbol
->n_numaux
, main_aux
);
1783 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1786 /* Support for line number handling. */
1788 /* This function is called for every section; it finds the outer limits
1789 * of the line table (minimum and maximum file offset) so that the
1790 * mainline code can read the whole thing for efficiency.
1793 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1795 struct coff_symfile_info
*info
;
1797 file_ptr offset
, maxoff
;
1799 count
= asect
->lineno_count
;
1801 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1804 size
= count
* coff_data (abfd
)->local_linesz
;
1805 info
= (struct coff_symfile_info
*) vpinfo
;
1806 offset
= asect
->line_filepos
;
1807 maxoff
= offset
+ size
;
1809 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1810 info
->min_lineno_offset
= offset
;
1812 if (maxoff
> info
->max_lineno_offset
)
1813 info
->max_lineno_offset
= maxoff
;
1817 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1819 struct cleanup
*old_chain
;
1828 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1833 /* Read in all partial symtabs on which this one is dependent. */
1834 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1835 if (!pst
->dependencies
[i
]->readin
)
1837 /* Inform about additional files that need to be read in. */
1840 fputs_filtered (" ", gdb_stdout
);
1842 fputs_filtered ("and ", gdb_stdout
);
1844 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1845 wrap_here (""); /* Flush output */
1846 gdb_flush (gdb_stdout
);
1848 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1851 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1853 /* Init stuff necessary for reading in symbols. */
1856 old_chain
= make_cleanup (really_free_pendings
, 0);
1858 read_xcoff_symtab (objfile
, pst
);
1860 do_cleanups (old_chain
);
1866 /* Read in all of the symbols for a given psymtab for real.
1867 Be verbose about it if the user wants that. SELF is not NULL. */
1870 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1875 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1880 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1881 || self
->number_of_dependencies
)
1883 /* Print the message now, before reading the string table,
1884 to avoid disconcerting pauses. */
1887 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1888 gdb_flush (gdb_stdout
);
1891 next_symbol_text_func
= xcoff_next_symbol_text
;
1893 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1895 /* Match with global symbols. This only needs to be done once,
1896 after all of the symtabs and dependencies have been read in. */
1897 scan_file_globals (objfile
);
1899 /* Finish up the debug error message. */
1901 printf_filtered ("done.\n");
1906 xcoff_new_init (struct objfile
*objfile
)
1908 stabsread_new_init ();
1909 buildsym_new_init ();
1912 /* Do initialization in preparation for reading symbols from OBJFILE.
1914 We will only be called if this is an XCOFF or XCOFF-like file.
1915 BFD handles figuring out the format of the file, and code in symfile.c
1916 uses BFD's determination to vector to us. */
1919 xcoff_symfile_init (struct objfile
*objfile
)
1921 struct coff_symfile_info
*xcoff
;
1923 /* Allocate struct to keep track of the symfile. */
1924 xcoff
= XNEW (struct coff_symfile_info
);
1925 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1927 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1928 find this causes a significant slowdown in gdb then we could
1929 set it in the debug symbol readers only when necessary. */
1930 objfile
->flags
|= OBJF_REORDERED
;
1933 /* Perform any local cleanups required when we are done with a particular
1934 objfile. I.E, we are in the process of discarding all symbol information
1935 for an objfile, freeing up all memory held for it, and unlinking the
1936 objfile struct from the global list of known objfiles. */
1939 xcoff_symfile_finish (struct objfile
*objfile
)
1941 /* Start with a fresh include table for the next objfile. */
1947 inclIndx
= inclLength
= inclDepth
= 0;
1949 dwarf2_free_objfile (objfile
);
1954 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1958 unsigned char lengthbuf
[4];
1960 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1962 xcoff
->strtbl
= NULL
;
1964 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1965 error (_("cannot seek to string table in %s: %s"),
1966 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1968 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1969 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1971 /* If no string table is needed, then the file may end immediately
1972 after the symbols. Just return with `strtbl' set to NULL. */
1974 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1977 /* Allocate string table from objfile_obstack. We will need this table
1978 as long as we have its symbol table around. */
1980 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1981 xcoff
->strtbl
= strtbl
;
1983 /* Copy length buffer, the first byte is usually zero and is
1984 used for stabs with a name length of zero. */
1985 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1986 if (length
== sizeof lengthbuf
)
1989 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1991 if (val
!= length
- sizeof lengthbuf
)
1992 error (_("cannot read string table from %s: %s"),
1993 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1994 if (strtbl
[length
- 1] != '\0')
1995 error (_("bad symbol file: string table "
1996 "does not end with null character"));
2001 /* If we have not yet seen a function for this psymtab, this is 0. If we
2002 have seen one, it is the offset in the line numbers of the line numbers
2004 static unsigned int first_fun_line_offset
;
2006 /* Allocate and partially fill a partial symtab. It will be
2007 completely filled at the end of the symbol list.
2009 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2010 is the address relative to which its symbols are (incremental) or 0
2013 static struct partial_symtab
*
2014 xcoff_start_psymtab (struct objfile
*objfile
,
2015 const char *filename
, int first_symnum
,
2016 struct partial_symbol
**global_syms
,
2017 struct partial_symbol
**static_syms
)
2019 struct partial_symtab
*result
=
2020 start_psymtab_common (objfile
,
2022 /* We fill in textlow later. */
2024 global_syms
, static_syms
);
2026 result
->read_symtab_private
=
2027 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2028 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2029 result
->read_symtab
= xcoff_read_symtab
;
2031 /* Deduce the source language from the filename for this psymtab. */
2032 psymtab_language
= deduce_language_from_filename (filename
);
2037 /* Close off the current usage of PST.
2038 Returns PST, or NULL if the partial symtab was empty and thrown away.
2040 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2042 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2043 are the information for includes and dependencies. */
2045 static struct partial_symtab
*
2046 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2047 const char **include_list
, int num_includes
,
2048 int capping_symbol_number
,
2049 struct partial_symtab
**dependency_list
,
2050 int number_dependencies
, int textlow_not_set
)
2054 if (capping_symbol_number
!= -1)
2055 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2056 capping_symbol_number
2057 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2058 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2059 first_fun_line_offset
;
2060 first_fun_line_offset
= 0;
2062 end_psymtab_common (objfile
, pst
);
2064 pst
->number_of_dependencies
= number_dependencies
;
2065 if (number_dependencies
)
2067 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2068 struct partial_symtab
*,
2069 number_dependencies
);
2070 memcpy (pst
->dependencies
, dependency_list
,
2071 number_dependencies
* sizeof (struct partial_symtab
*));
2074 pst
->dependencies
= 0;
2076 for (i
= 0; i
< num_includes
; i
++)
2078 struct partial_symtab
*subpst
=
2079 allocate_psymtab (include_list
[i
], objfile
);
2081 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2082 sizeof (struct symloc
));
2083 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2084 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2085 subpst
->textlow
= 0;
2086 subpst
->texthigh
= 0;
2088 /* We could save slight bits of space by only making one of these,
2089 shared by the entire set of include files. FIXME-someday. */
2090 subpst
->dependencies
=
2091 XOBNEW (&objfile
->objfile_obstack
, 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;
2101 subpst
->compunit_symtab
= NULL
;
2102 subpst
->read_symtab
= pst
->read_symtab
;
2105 if (num_includes
== 0
2106 && number_dependencies
== 0
2107 && pst
->n_global_syms
== 0
2108 && pst
->n_static_syms
== 0)
2110 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2111 it is on the obstack, but we can forget to chain it on the list. */
2112 /* Empty psymtabs happen as a result of header files which don't have
2113 any symbols in them. There can be a lot of them. */
2115 discard_psymtab (objfile
, pst
);
2117 /* Indicate that psymtab was thrown away. */
2123 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2124 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2125 the symbol and its auxents. */
2128 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2129 const char **name
, char **raw
, unsigned int *symnump
,
2130 struct objfile
*objfile
)
2132 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2133 if (symbol
->n_zeroes
)
2135 /* If it's exactly E_SYMNMLEN characters long it isn't
2137 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2139 /* FIXME: wastes memory for symbols which we don't end up putting
2140 into the minimal symbols. */
2143 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2145 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2146 p
[E_SYMNMLEN
] = '\0';
2150 /* Point to the unswapped name as that persists as long as the
2152 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2154 else if (symbol
->n_sclass
& 0x80)
2156 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2160 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2163 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2164 if (symbol
->n_numaux
> 0)
2166 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2167 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2169 *symnump
+= symbol
->n_numaux
;
2170 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2175 function_outside_compilation_unit_complaint (const char *arg1
)
2177 complaint (&symfile_complaints
,
2178 _("function `%s' appears to be defined "
2179 "outside of all compilation units"),
2184 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2185 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
;
2196 /* Current partial symtab */
2197 struct partial_symtab
*pst
;
2199 /* List of current psymtab's include files. */
2200 const char **psymtab_include_list
;
2201 int includes_allocated
;
2204 /* Index within current psymtab dependency list. */
2205 struct partial_symtab
**dependency_list
;
2206 int dependencies_used
, dependencies_allocated
;
2209 struct internal_syment symbol
;
2210 union internal_auxent main_aux
[5];
2211 unsigned int ssymnum
;
2213 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2214 CORE_ADDR last_csect_val
= 0;
2215 int last_csect_sec
= 0;
2216 int misc_func_recorded
= 0; /* true if any misc. function. */
2217 int textlow_not_set
= 1;
2219 pst
= (struct partial_symtab
*) 0;
2221 includes_allocated
= 30;
2223 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2224 sizeof (const char *));
2226 dependencies_allocated
= 30;
2227 dependencies_used
= 0;
2229 (struct partial_symtab
**) alloca (dependencies_allocated
*
2230 sizeof (struct partial_symtab
*));
2232 set_last_source_file (NULL
);
2234 abfd
= objfile
->obfd
;
2235 next_symbol_text_func
= xcoff_next_symbol_text
;
2237 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2238 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2240 while (ssymnum
< nsyms
)
2246 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2247 sclass
= symbol
.n_sclass
;
2254 /* The CSECT auxent--always the last auxent. */
2255 union internal_auxent csect_aux
;
2256 unsigned int symnum_before
= ssymnum
;
2258 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2260 if (symbol
.n_numaux
> 1)
2262 bfd_coff_swap_aux_in
2264 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2267 symbol
.n_numaux
- 1,
2272 csect_aux
= main_aux
[0];
2274 /* If symbol name starts with ".$" or "$", ignore it. */
2275 if (namestring
[0] == '$'
2276 || (namestring
[0] == '.' && namestring
[1] == '$'))
2279 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2282 switch (csect_aux
.x_csect
.x_smclas
)
2285 if (last_csect_name
)
2287 /* If no misc. function recorded in the last
2288 seen csect, enter it as a function. This
2289 will take care of functions like strcmp()
2292 if (!misc_func_recorded
)
2294 record_minimal_symbol
2295 (reader
, last_csect_name
, last_csect_val
,
2296 mst_text
, last_csect_sec
, objfile
);
2297 misc_func_recorded
= 1;
2302 /* We have to allocate one psymtab for
2303 each program csect, because their text
2304 sections need not be adjacent. */
2306 (objfile
, pst
, psymtab_include_list
,
2307 includes_used
, symnum_before
, dependency_list
,
2308 dependencies_used
, textlow_not_set
);
2310 dependencies_used
= 0;
2311 /* Give all psymtabs for this source file the same
2313 pst
= xcoff_start_psymtab
2317 objfile
->global_psymbols
.next
,
2318 objfile
->static_psymbols
.next
);
2321 /* Activate the misc_func_recorded mechanism for
2322 compiler- and linker-generated CSECTs like ".strcmp"
2324 if (namestring
&& (namestring
[0] == '.'
2325 || namestring
[0] == '@'))
2327 last_csect_name
= namestring
;
2328 last_csect_val
= symbol
.n_value
;
2329 last_csect_sec
= symbol
.n_scnum
;
2334 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2336 if (highval
> pst
->texthigh
)
2337 pst
->texthigh
= highval
;
2338 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2339 pst
->textlow
= symbol
.n_value
;
2341 misc_func_recorded
= 0;
2346 /* Data variables are recorded in the minimal symbol
2347 table, except for section symbols. */
2348 if (*namestring
!= '.')
2349 record_minimal_symbol
2350 (reader
, namestring
, symbol
.n_value
,
2351 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2352 symbol
.n_scnum
, objfile
);
2357 warning (_("More than one XMC_TC0 symbol found."));
2358 toc_offset
= symbol
.n_value
;
2360 /* Make TOC offset relative to start address of
2362 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2364 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2368 /* These symbols tell us where the TOC entry for a
2369 variable is, not the variable itself. */
2378 switch (csect_aux
.x_csect
.x_smclas
)
2381 /* A function entry point. */
2383 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2384 first_fun_line_offset
=
2385 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2387 record_minimal_symbol
2388 (reader
, namestring
, symbol
.n_value
,
2389 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2390 symbol
.n_scnum
, objfile
);
2391 misc_func_recorded
= 1;
2395 /* shared library function trampoline code entry
2398 /* record trampoline code entries as
2399 mst_solib_trampoline symbol. When we lookup mst
2400 symbols, we will choose mst_text over
2401 mst_solib_trampoline. */
2402 record_minimal_symbol
2403 (reader
, namestring
, symbol
.n_value
,
2404 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2405 misc_func_recorded
= 1;
2409 /* The symbols often have the same names as
2410 debug symbols for functions, and confuse
2416 /* xlc puts each variable in a separate csect,
2417 so we get an XTY_SD for each variable. But
2418 gcc puts several variables in a csect, so
2419 that each variable only gets an XTY_LD. We
2420 still need to record them. This will
2421 typically be XMC_RW; I suspect XMC_RO and
2422 XMC_BS might be possible too. */
2423 if (*namestring
!= '.')
2424 record_minimal_symbol
2425 (reader
, namestring
, symbol
.n_value
,
2426 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2427 symbol
.n_scnum
, objfile
);
2433 switch (csect_aux
.x_csect
.x_smclas
)
2437 /* Common variables are recorded in the minimal symbol
2438 table, except for section symbols. */
2439 if (*namestring
!= '.')
2440 record_minimal_symbol
2441 (reader
, namestring
, symbol
.n_value
,
2442 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2443 symbol
.n_scnum
, objfile
);
2455 unsigned int symnum_before
;
2457 symnum_before
= ssymnum
;
2458 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2461 /* See if the last csect needs to be recorded. */
2463 if (last_csect_name
&& !misc_func_recorded
)
2465 /* If no misc. function recorded in the last seen csect, enter
2466 it as a function. This will take care of functions like
2467 strcmp() compiled by xlc. */
2469 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2470 mst_text
, last_csect_sec
, objfile
);
2471 misc_func_recorded
= 1;
2476 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2477 includes_used
, symnum_before
,
2478 dependency_list
, dependencies_used
,
2481 dependencies_used
= 0;
2483 first_fun_line_offset
= 0;
2485 /* XCOFF, according to the AIX 3.2 documentation, puts the
2486 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2487 do things the standard COFF way and put it in the auxent.
2488 We use the auxent if the symbol is ".file" and an auxent
2489 exists, otherwise use the symbol itself. */
2490 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2492 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2495 filestring
= namestring
;
2497 pst
= xcoff_start_psymtab (objfile
,
2500 objfile
->global_psymbols
.next
,
2501 objfile
->static_psymbols
.next
);
2502 last_csect_name
= NULL
;
2508 complaint (&symfile_complaints
,
2509 _("Storage class %d not recognized during scan"),
2514 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2515 to handle only the C_FUN and C_EXT. */
2530 /* C_EINCL means we are switching back to the main file. But there
2531 is no reason to care; the only thing we want to know about
2532 includes is the names of all the included (.h) files. */
2537 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2541 /* I don't think the name of the common block (as opposed to the
2542 variables within it) is something which is user visible
2550 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2551 so C_LSYM would appear to be only for locals. */
2557 /* We probably could save a few instructions by assuming that
2558 C_LSYM, C_PSYM, etc., never have auxents. */
2559 int naux1
= symbol
.n_numaux
+ 1;
2562 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2568 /* Mark down an include file in the current psymtab. */
2569 enum language tmp_language
;
2571 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2574 tmp_language
= deduce_language_from_filename (namestring
);
2576 /* Only change the psymtab's language if we've learned
2577 something useful (eg. tmp_language is not language_unknown).
2578 In addition, to match what start_subfile does, never change
2580 if (tmp_language
!= language_unknown
2581 && (tmp_language
!= language_c
2582 || psymtab_language
!= language_cplus
))
2583 psymtab_language
= tmp_language
;
2585 /* In C++, one may expect the same filename to come round many
2586 times, when code is coming alternately from the main file
2587 and from inline functions in other files. So I check to see
2588 if this is a file we've seen before -- either the main
2589 source file, or a previously included file.
2591 This seems to be a lot of time to be spending on N_SOL, but
2592 things like "break c-exp.y:435" need to work (I
2593 suppose the psymtab_include_list could be hashed or put
2594 in a binary tree, if profiling shows this is a major hog). */
2595 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2601 for (i
= 0; i
< includes_used
; i
++)
2602 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2610 psymtab_include_list
[includes_used
++] = namestring
;
2611 if (includes_used
>= includes_allocated
)
2613 const char **orig
= psymtab_include_list
;
2615 psymtab_include_list
= (const char **)
2616 alloca ((includes_allocated
*= 2) *
2617 sizeof (const char *));
2618 memcpy (psymtab_include_list
, orig
,
2619 includes_used
* sizeof (const char *));
2624 /* The value of the C_FUN is not the address of the function (it
2625 appears to be the address before linking), but as long as it
2626 is smaller than the actual address, then find_pc_partial_function
2627 will use the minimal symbols instead. I hope. */
2636 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2639 p
= strchr (namestring
, ':');
2641 continue; /* Not a debugging symbol. */
2643 /* Main processing section for debugging symbols which
2644 the initial read through the symbol tables needs to worry
2645 about. If we reach this point, the symbol which we are
2646 considering is definitely one we are interested in.
2647 p must also contain the (valid) index into the namestring
2648 which indicates the debugging type symbol. */
2653 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2654 SECT_OFF_DATA (objfile
));
2656 if (gdbarch_static_transform_name_p (gdbarch
))
2657 namestring
= gdbarch_static_transform_name
2658 (gdbarch
, namestring
);
2660 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2661 VAR_DOMAIN
, LOC_STATIC
,
2662 &objfile
->static_psymbols
,
2664 psymtab_language
, objfile
);
2668 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2669 SECT_OFF_DATA (objfile
));
2670 /* The addresses in these entries are reported to be
2671 wrong. See the code that reads 'G's for symtabs. */
2672 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2673 VAR_DOMAIN
, LOC_STATIC
,
2674 &objfile
->global_psymbols
,
2676 psymtab_language
, objfile
);
2680 /* When a 'T' entry is defining an anonymous enum, it
2681 may have a name which is the empty string, or a
2682 single space. Since they're not really defining a
2683 symbol, those shouldn't go in the partial symbol
2684 table. We do pick up the elements of such enums at
2685 'check_enum:', below. */
2686 if (p
>= namestring
+ 2
2687 || (p
== namestring
+ 1
2688 && namestring
[0] != ' '))
2690 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2691 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2692 &objfile
->static_psymbols
,
2693 0, psymtab_language
, objfile
);
2696 /* Also a typedef with the same name. */
2697 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2698 VAR_DOMAIN
, LOC_TYPEDEF
,
2699 &objfile
->static_psymbols
,
2700 0, psymtab_language
, objfile
);
2707 if (p
!= namestring
) /* a name is there, not just :T... */
2709 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2710 VAR_DOMAIN
, LOC_TYPEDEF
,
2711 &objfile
->static_psymbols
,
2712 0, psymtab_language
, objfile
);
2715 /* If this is an enumerated type, we need to
2716 add all the enum constants to the partial symbol
2717 table. This does not cover enums without names, e.g.
2718 "enum {a, b} c;" in C, but fortunately those are
2719 rare. There is no way for GDB to find those from the
2720 enum type without spending too much time on it. Thus
2721 to solve this problem, the compiler needs to put out the
2722 enum in a nameless type. GCC2 does this. */
2724 /* We are looking for something of the form
2725 <name> ":" ("t" | "T") [<number> "="] "e"
2726 {<constant> ":" <value> ","} ";". */
2728 /* Skip over the colon and the 't' or 'T'. */
2730 /* This type may be given a number. Also, numbers can come
2731 in pairs like (0,26). Skip over it. */
2732 while ((*p
>= '0' && *p
<= '9')
2733 || *p
== '(' || *p
== ',' || *p
== ')'
2739 /* The aix4 compiler emits extra crud before the
2743 /* Skip over the type (?). */
2747 /* Skip over the colon. */
2751 /* We have found an enumerated type. */
2752 /* According to comments in read_enum_type
2753 a comma could end it instead of a semicolon.
2754 I don't know where that happens.
2756 while (*p
&& *p
!= ';' && *p
!= ',')
2760 /* Check for and handle cretinous dbx symbol name
2762 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2763 p
= next_symbol_text (objfile
);
2765 /* Point to the character after the name
2766 of the enum constant. */
2767 for (q
= p
; *q
&& *q
!= ':'; q
++)
2769 /* Note that the value doesn't matter for
2770 enum constants in psymtabs, just in symtabs. */
2771 add_psymbol_to_list (p
, q
- p
, 1,
2772 VAR_DOMAIN
, LOC_CONST
,
2773 &objfile
->static_psymbols
,
2774 0, psymtab_language
, objfile
);
2775 /* Point past the name. */
2777 /* Skip over the value. */
2778 while (*p
&& *p
!= ',')
2780 /* Advance past the comma. */
2788 /* Constant, e.g. from "const" in Pascal. */
2789 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2790 VAR_DOMAIN
, LOC_CONST
,
2791 &objfile
->static_psymbols
,
2792 0, psymtab_language
, objfile
);
2798 int name_len
= p
- namestring
;
2799 char *name
= (char *) xmalloc (name_len
+ 1);
2801 memcpy (name
, namestring
, name_len
);
2802 name
[name_len
] = '\0';
2803 function_outside_compilation_unit_complaint (name
);
2806 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2807 SECT_OFF_TEXT (objfile
));
2808 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2809 VAR_DOMAIN
, LOC_BLOCK
,
2810 &objfile
->static_psymbols
,
2812 psymtab_language
, objfile
);
2815 /* Global functions were ignored here, but now they
2816 are put into the global psymtab like one would expect.
2817 They're also in the minimal symbol table. */
2821 int name_len
= p
- namestring
;
2822 char *name
= (char *) xmalloc (name_len
+ 1);
2824 memcpy (name
, namestring
, name_len
);
2825 name
[name_len
] = '\0';
2826 function_outside_compilation_unit_complaint (name
);
2830 /* We need only the minimal symbols for these
2831 loader-generated definitions. Keeping the global
2832 symbols leads to "in psymbols but not in symbols"
2834 if (startswith (namestring
, "@FIX"))
2837 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2838 SECT_OFF_TEXT (objfile
));
2839 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2840 VAR_DOMAIN
, LOC_BLOCK
,
2841 &objfile
->global_psymbols
,
2843 psymtab_language
, objfile
);
2846 /* Two things show up here (hopefully); static symbols of
2847 local scope (static used inside braces) or extensions
2848 of structure symbols. We can ignore both. */
2862 case '#': /* For symbol identification (used in
2867 /* It is a C++ nested symbol. We don't need to record it
2868 (I don't think); if we try to look up foo::bar::baz,
2869 then symbols for the symtab containing foo should get
2870 read in, I think. */
2871 /* Someone says sun cc puts out symbols like
2872 /foo/baz/maclib::/usr/local/bin/maclib,
2873 which would get here with a symbol type of ':'. */
2877 /* Unexpected symbol descriptor. The second and
2878 subsequent stabs of a continued stab can show up
2879 here. The question is whether they ever can mimic
2880 a normal stab--it would be nice if not, since we
2881 certainly don't want to spend the time searching to
2882 the end of every string looking for a
2885 complaint (&symfile_complaints
,
2886 _("unknown symbol descriptor `%c'"), p
[1]);
2888 /* Ignore it; perhaps it is an extension that we don't
2898 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2899 ssymnum
, dependency_list
,
2900 dependencies_used
, textlow_not_set
);
2903 /* Record the toc offset value of this symbol table into objfile
2904 structure. If no XMC_TC0 is found, toc_offset should be zero.
2905 Another place to obtain this information would be file auxiliary
2908 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2911 /* Return the toc offset value for a given objfile. */
2914 xcoff_get_toc_offset (struct objfile
*objfile
)
2917 return XCOFF_DATA (objfile
)->toc_offset
;
2921 /* Scan and build partial symbols for a symbol file.
2922 We have been initialized by a call to dbx_symfile_init, which
2923 put all the relevant info into a "struct dbx_symfile_info",
2924 hung off the objfile structure.
2926 SECTION_OFFSETS contains offsets relative to which the symbols in the
2927 various sections are (depending where the sections were actually
2931 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2935 struct cleanup
*back_to
;
2936 int num_symbols
; /* # of symbols */
2937 file_ptr symtab_offset
; /* symbol table and */
2938 file_ptr stringtab_offset
; /* string table file offsets */
2939 struct coff_symfile_info
*info
;
2943 info
= XCOFF_DATA (objfile
);
2944 symfile_bfd
= abfd
= objfile
->obfd
;
2945 name
= objfile_name (objfile
);
2947 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2948 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2949 stringtab_offset
= symtab_offset
+
2950 num_symbols
* coff_data (abfd
)->local_symesz
;
2952 info
->min_lineno_offset
= 0;
2953 info
->max_lineno_offset
= 0;
2954 bfd_map_over_sections (abfd
, find_linenos
, info
);
2956 if (num_symbols
> 0)
2958 /* Read the string table. */
2959 init_stringtab (abfd
, stringtab_offset
, objfile
);
2961 /* Read the .debug section, if present. */
2963 struct bfd_section
*secp
;
2964 bfd_size_type length
;
2965 bfd_byte
*debugsec
= NULL
;
2967 secp
= bfd_get_section_by_name (abfd
, ".debug");
2970 length
= bfd_section_size (abfd
, secp
);
2974 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2977 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2979 error (_("Error reading .debug section of `%s': %s"),
2980 name
, bfd_errmsg (bfd_get_error ()));
2984 info
->debugsec
= (char *) debugsec
;
2988 /* Read the symbols. We keep them in core because we will want to
2989 access them randomly in read_symbol*. */
2990 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2992 error (_("Error reading symbols from %s: %s"),
2993 name
, bfd_errmsg (bfd_get_error ()));
2994 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2995 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2996 info
->symtbl_num_syms
= num_symbols
;
2998 val
= bfd_bread (info
->symtbl
, size
, abfd
);
3000 perror_with_name (_("reading symbol table"));
3002 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3003 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3004 /* I'm not sure how how good num_symbols is; the rule of thumb in
3005 init_psymbol_list was developed for a.out. On the one hand,
3006 num_symbols includes auxents. On the other hand, it doesn't
3008 init_psymbol_list (objfile
, num_symbols
);
3010 free_pending_blocks ();
3011 back_to
= make_cleanup (really_free_pendings
, 0);
3013 minimal_symbol_reader
reader (objfile
);
3015 /* Now that the symbol table data of the executable file are all in core,
3016 process them and define symbols accordingly. */
3018 scan_xcoff_symtab (reader
, objfile
);
3020 /* Install any minimal symbols that have been collected as the current
3021 minimal symbols for this objfile. */
3025 /* DWARF2 sections. */
3027 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3028 dwarf2_build_psymtabs (objfile
);
3030 dwarf2_build_frame_info (objfile
);
3032 do_cleanups (back_to
);
3036 xcoff_symfile_offsets (struct objfile
*objfile
,
3037 const struct section_addr_info
*addrs
)
3039 const char *first_section_name
;
3041 default_symfile_offsets (objfile
, addrs
);
3043 /* Oneof the weird side-effects of default_symfile_offsets is that
3044 it sometimes sets some section indices to zero for sections that,
3045 in fact do not exist. See the body of default_symfile_offsets
3046 for more info on when that happens. Undo that, as this then allows
3047 us to test whether the associated section exists or not, and then
3048 access it quickly (without searching it again). */
3050 if (objfile
->num_sections
== 0)
3051 return; /* Is that even possible? Better safe than sorry. */
3054 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3056 if (objfile
->sect_index_text
== 0
3057 && strcmp (first_section_name
, ".text") != 0)
3058 objfile
->sect_index_text
= -1;
3060 if (objfile
->sect_index_data
== 0
3061 && strcmp (first_section_name
, ".data") != 0)
3062 objfile
->sect_index_data
= -1;
3064 if (objfile
->sect_index_bss
== 0
3065 && strcmp (first_section_name
, ".bss") != 0)
3066 objfile
->sect_index_bss
= -1;
3068 if (objfile
->sect_index_rodata
== 0
3069 && strcmp (first_section_name
, ".rodata") != 0)
3070 objfile
->sect_index_rodata
= -1;
3073 /* Register our ability to parse symbols for xcoff BFD files. */
3075 static const struct sym_fns xcoff_sym_fns
=
3078 /* It is possible that coff and xcoff should be merged as
3079 they do have fundamental similarities (for example, the extra storage
3080 classes used for stabs could presumably be recognized in any COFF file).
3081 However, in addition to obvious things like all the csect hair, there are
3082 some subtler differences between xcoffread.c and coffread.c, notably
3083 the fact that coffread.c has no need to read in all the symbols, but
3084 xcoffread.c reads all the symbols and does in fact randomly access them
3085 (in C_BSTAT and line number processing). */
3087 xcoff_new_init
, /* init anything gbl to entire symtab */
3088 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3089 xcoff_initial_scan
, /* read a symbol file into symtab */
3090 NULL
, /* sym_read_psymbols */
3091 xcoff_symfile_finish
, /* finished with file, cleanup */
3092 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3093 default_symfile_segments
, /* Get segment information from a file. */
3094 aix_process_linenos
,
3095 default_symfile_relocate
, /* Relocate a debug section. */
3096 NULL
, /* sym_probe_fns */
3100 /* Same as xcoff_get_n_import_files, but for core files. */
3103 xcoff_get_core_n_import_files (bfd
*abfd
)
3105 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3107 file_ptr offset
= 0;
3111 return -1; /* Not a core file. */
3113 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3119 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3121 next
= bfd_get_32 (abfd
, buf
);
3123 break; /* This is the last entry. */
3127 /* Return the number of entries, excluding the first one, which is
3128 the path to the executable that produced this core file. */
3129 return n_entries
- 1;
3132 /* Return the number of import files (shared libraries) that the given
3133 BFD depends on. Return -1 if this number could not be computed. */
3136 xcoff_get_n_import_files (bfd
*abfd
)
3138 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3142 /* If the ".loader" section does not exist, the objfile is probably
3143 not an executable. Might be a core file... */
3145 return xcoff_get_core_n_import_files (abfd
);
3147 /* The number of entries in the Import Files Table is stored in
3148 field l_nimpid. This field is always at offset 16, and is
3149 always 4 bytes long. Read those 4 bytes. */
3151 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3153 l_nimpid
= bfd_get_32 (abfd
, buf
);
3155 /* By convention, the first entry is the default LIBPATH value
3156 to be used by the system loader, so it does not count towards
3157 the number of import files. */
3158 return l_nimpid
- 1;
3161 /* Free the per-objfile xcoff data. */
3164 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3169 /* Provide a prototype to silence -Wmissing-prototypes. */
3170 extern initialize_file_ftype _initialize_xcoffread
;
3173 _initialize_xcoffread (void)
3175 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3177 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,