1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2018 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 */
177 { NULL
, NULL
}, /* debug_names */
178 { NULL
, NULL
}, /* debug_aranges */
183 bf_notfound_complaint (void)
185 complaint (&symfile_complaints
,
186 _("line numbers off, `.bf' symbol not found"));
190 ef_complaint (int arg1
)
192 complaint (&symfile_complaints
,
193 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
197 eb_complaint (int arg1
)
199 complaint (&symfile_complaints
,
200 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
203 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
205 static void scan_xcoff_symtab (minimal_symbol_reader
&,
208 static const char *xcoff_next_symbol_text (struct objfile
*);
210 static void record_include_begin (struct coff_symbol
*);
213 enter_line_range (struct subfile
*, unsigned, unsigned,
214 CORE_ADDR
, CORE_ADDR
, unsigned *);
216 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
218 static void xcoff_symfile_init (struct objfile
*);
220 static void xcoff_new_init (struct objfile
*);
222 static void xcoff_symfile_finish (struct objfile
*);
224 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
226 static void read_symbol (struct internal_syment
*, int);
228 static int read_symbol_lineno (int);
230 static CORE_ADDR
read_symbol_nvalue (int);
232 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
235 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
238 static void add_stab_to_list (char *, struct pending_stabs
**);
241 static int compare_lte (const void *, const void *);
243 static struct linetable
*arrange_linetable (struct linetable
*);
245 static void record_include_end (struct coff_symbol
*);
247 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
250 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
252 static int secnum_to_section (int, struct objfile
*);
253 static asection
*secnum_to_bfd_section (int, struct objfile
*);
255 struct find_targ_sec_arg
260 struct objfile
*objfile
;
263 static void find_targ_sec (bfd
*, asection
*, void *);
266 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
268 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
269 struct objfile
*objfile
= args
->objfile
;
271 if (sect
->target_index
== args
->targ_index
)
273 /* This is the section. Figure out what SECT_OFF_* code it is. */
274 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
275 *args
->resultp
= SECT_OFF_TEXT (objfile
);
276 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
277 *args
->resultp
= SECT_OFF_DATA (objfile
);
279 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
280 *args
->bfd_sect
= sect
;
284 /* Search all BFD sections for the section whose target_index is
285 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
286 associated index in the objfile's section_offset table is also
289 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
290 is set to the text section's number. */
293 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
294 asection
**bfd_sect
, int *secnum
)
296 struct find_targ_sec_arg args
;
298 args
.targ_index
= n_scnum
;
299 args
.resultp
= secnum
;
300 args
.bfd_sect
= bfd_sect
;
301 args
.objfile
= objfile
;
304 *secnum
= SECT_OFF_TEXT (objfile
);
306 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
309 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
312 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
317 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
321 /* Return the BFD section that N_SCNUM points to. */
324 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
329 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
333 /* add a given stab string into given stab vector. */
338 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
340 if (*stabvector
== NULL
)
342 *stabvector
= (struct pending_stabs
*)
343 xmalloc (sizeof (struct pending_stabs
) +
344 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
345 (*stabvector
)->count
= 0;
346 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
348 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
350 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
351 *stabvector
= (struct pending_stabs
*)
352 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
353 (*stabvector
)->length
* sizeof (char *));
355 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
360 /* Linenos are processed on a file-by-file basis.
364 1) xlc (IBM's native c compiler) postpones static function code
365 emission to the end of a compilation unit. This way it can
366 determine if those functions (statics) are needed or not, and
367 can do some garbage collection (I think). This makes line
368 numbers and corresponding addresses unordered, and we end up
369 with a line table like:
386 and that breaks gdb's binary search on line numbers, if the
387 above table is not sorted on line numbers. And that sort
388 should be on function based, since gcc can emit line numbers
391 10 0x100 - for the init/test part of a for stmt.
394 10 0x400 - for the increment part of a for stmt.
396 arrange_linetable() will do this sorting.
398 2) aix symbol table might look like:
400 c_file // beginning of a new file
401 .bi // beginning of include file
402 .ei // end of include file
406 basically, .bi/.ei pairs do not necessarily encapsulate
407 their scope. They need to be recorded, and processed later
408 on when we come the end of the compilation unit.
409 Include table (inclTable) and process_linenos() handle
415 /* compare line table entry addresses. */
418 compare_lte (const void *lte1p
, const void *lte2p
)
420 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
421 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
423 return lte1
->pc
- lte2
->pc
;
426 /* Given a line table with function entries are marked, arrange its
427 functions in ascending order and strip off function entry markers
428 and return it in a newly created table. If the old one is good
429 enough, return the old one. */
430 /* FIXME: I think all this stuff can be replaced by just passing
431 sort_linevec = 1 to end_symtab. */
433 static struct linetable
*
434 arrange_linetable (struct linetable
*oldLineTb
)
436 int ii
, jj
, newline
, /* new line count */
437 function_count
; /* # of functions */
439 struct linetable_entry
*fentry
; /* function entry vector */
440 int fentry_size
; /* # of function entries */
441 struct linetable
*newLineTb
; /* new line table */
444 #define NUM_OF_FUNCTIONS 20
446 fentry_size
= NUM_OF_FUNCTIONS
;
447 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
449 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
451 if (oldLineTb
->item
[ii
].line
== 0)
452 { /* Function entry found. */
453 if (function_count
>= fentry_size
)
454 { /* Make sure you have room. */
456 fentry
= (struct linetable_entry
*)
458 fentry_size
* sizeof (struct linetable_entry
));
460 fentry
[function_count
].line
= ii
;
461 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
464 /* If the function was compiled with XLC, we may have to add an
465 extra line entry later. Reserve space for that. */
466 if (ii
+ 1 < oldLineTb
->nitems
467 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
472 if (function_count
== 0)
477 else if (function_count
> 1)
478 qsort (fentry
, function_count
,
479 sizeof (struct linetable_entry
), compare_lte
);
481 /* Allocate a new line table. */
482 newLineTb
= (struct linetable
*)
484 (sizeof (struct linetable
) +
485 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
487 /* If line table does not start with a function beginning, copy up until
491 if (oldLineTb
->item
[0].line
!= 0)
493 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
494 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
496 /* Now copy function lines one by one. */
498 for (ii
= 0; ii
< function_count
; ++ii
)
500 /* If the function was compiled with XLC, we may have to add an
501 extra line to cover the function prologue. */
502 jj
= fentry
[ii
].line
;
503 if (jj
+ 1 < oldLineTb
->nitems
504 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
506 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
507 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
511 for (jj
= fentry
[ii
].line
+ 1;
512 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
514 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
517 /* The number of items in the line table must include these
518 extra lines which were added in case of XLC compiled functions. */
519 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
523 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
524 following `IncludeChain'. At the end of each symtab (end_symtab),
525 we will determine if we should create additional symtab's to
526 represent if (the include files. */
529 typedef struct _inclTable
531 char *name
; /* include filename */
533 /* Offsets to the line table. end points to the last entry which is
534 part of this include file. */
537 struct subfile
*subfile
;
538 unsigned funStartLine
; /* Start line # of its function. */
542 #define INITIAL_INCLUDE_TABLE_LENGTH 20
543 static InclTable
*inclTable
; /* global include table */
544 static int inclIndx
; /* last entry to table */
545 static int inclLength
; /* table length */
546 static int inclDepth
; /* nested include depth */
548 static void allocate_include_entry (void);
551 record_include_begin (struct coff_symbol
*cs
)
555 /* In xcoff, we assume include files cannot be nested (not in .c files
556 of course, but in corresponding .s files.). */
558 /* This can happen with old versions of GCC.
559 GCC 2.3.3-930426 does not exhibit this on a test case which
560 a user said produced the message for him. */
561 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
565 allocate_include_entry ();
567 inclTable
[inclIndx
].name
= cs
->c_name
;
568 inclTable
[inclIndx
].begin
= cs
->c_value
;
572 record_include_end (struct coff_symbol
*cs
)
578 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
581 allocate_include_entry ();
583 pTbl
= &inclTable
[inclIndx
];
584 pTbl
->end
= cs
->c_value
;
591 allocate_include_entry (void)
593 if (inclTable
== NULL
)
595 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
596 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
599 else if (inclIndx
>= inclLength
)
601 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
602 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
603 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
604 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
608 /* Global variable to pass the psymtab down to all the routines involved
609 in psymtab to symtab processing. */
610 static struct partial_symtab
*this_symtab_psymtab
;
612 /* Objfile related to this_symtab_psymtab; set at the same time. */
613 static struct objfile
*this_symtab_objfile
;
615 /* given the start and end addresses of a compilation unit (or a csect,
616 at times) process its lines and create appropriate line vectors. */
619 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
623 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
625 /* subfile structure for the main compilation unit. */
626 struct subfile main_subfile
;
628 /* In the main source file, any time we see a function entry, we
629 reset this variable to function's absolute starting line number.
630 All the following line numbers in the function are relative to
631 this, and we record absolute line numbers in record_line(). */
633 unsigned int main_source_baseline
= 0;
638 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
640 goto return_after_cleanup
;
642 memset (&main_subfile
, '\0', sizeof (main_subfile
));
645 /* All source lines were in the main source file. None in include
648 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
649 &main_source_baseline
);
653 /* There was source with line numbers in include files. */
656 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
657 main_source_baseline
= 0;
659 for (ii
= 0; ii
< inclIndx
; ++ii
)
661 struct subfile
*tmpSubfile
;
663 /* If there is main file source before include file, enter it. */
664 if (offset
< inclTable
[ii
].begin
)
667 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
668 start
, 0, &main_source_baseline
);
671 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
673 /* The entry in the include table refers to the main source
674 file. Add the lines to the main subfile. */
676 main_source_baseline
= inclTable
[ii
].funStartLine
;
678 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
679 start
, 0, &main_source_baseline
);
680 inclTable
[ii
].subfile
= &main_subfile
;
684 /* Have a new subfile for the include file. */
686 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
688 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
689 firstLine
= &(inclTable
[ii
].funStartLine
);
691 /* Enter include file's lines now. */
692 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
693 inclTable
[ii
].end
, start
, 0, firstLine
);
696 if (offset
<= inclTable
[ii
].end
)
697 offset
= inclTable
[ii
].end
+ linesz
;
700 /* All the include files' line have been processed at this point. Now,
701 enter remaining lines of the main file, if any left. */
702 if (offset
< max_offset
+ 1 - linesz
)
704 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
705 &main_source_baseline
);
709 /* Process main file's line numbers. */
710 if (main_subfile
.line_vector
)
712 struct linetable
*lineTb
, *lv
;
714 lv
= main_subfile
.line_vector
;
716 /* Line numbers are not necessarily ordered. xlc compilation will
717 put static function to the end. */
719 lineTb
= arrange_linetable (lv
);
722 current_subfile
->line_vector
= (struct linetable
*)
723 xrealloc (lv
, (sizeof (struct linetable
)
724 + lv
->nitems
* sizeof (struct linetable_entry
)));
729 current_subfile
->line_vector
= lineTb
;
732 current_subfile
->line_vector_length
=
733 current_subfile
->line_vector
->nitems
;
736 /* Now, process included files' line numbers. */
738 for (ii
= 0; ii
< inclIndx
; ++ii
)
740 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
741 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
744 struct linetable
*lineTb
, *lv
;
746 lv
= (inclTable
[ii
].subfile
)->line_vector
;
748 /* Line numbers are not necessarily ordered. xlc compilation will
749 put static function to the end. */
751 lineTb
= arrange_linetable (lv
);
755 /* For the same include file, we might want to have more than one
756 subfile. This happens if we have something like:
764 while foo.h including code in it. (stupid but possible)
765 Since start_subfile() looks at the name and uses an
766 existing one if finds, we need to provide a fake name and
770 start_subfile (inclTable
[ii
].name
);
773 /* Pick a fake name that will produce the same results as this
774 one when passed to deduce_language_from_filename. Kludge on
776 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
778 if (fakename
== NULL
)
780 start_subfile (fakename
);
781 xfree (current_subfile
->name
);
783 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
788 current_subfile
->line_vector
=
789 (struct linetable
*) xrealloc
790 (lv
, (sizeof (struct linetable
)
791 + lv
->nitems
* sizeof (struct linetable_entry
)));
797 current_subfile
->line_vector
= lineTb
;
800 current_subfile
->line_vector_length
=
801 current_subfile
->line_vector
->nitems
;
802 start_subfile (pop_subfile ());
806 return_after_cleanup
:
808 /* We don't want to keep alloc/free'ing the global include file table. */
813 aix_process_linenos (struct objfile
*objfile
)
815 /* There is no linenos to read if there are only dwarf info. */
816 if (this_symtab_psymtab
== NULL
)
819 /* Process line numbers and enter them into line vector. */
820 process_linenos (last_source_start_addr
, cur_src_end_addr
);
824 /* Enter a given range of lines into the line vector.
825 can be called in the following two ways:
826 enter_line_range (subfile, beginoffset, endoffset,
827 startaddr, 0, firstLine) or
828 enter_line_range (subfile, beginoffset, 0,
829 startaddr, endaddr, firstLine)
831 endoffset points to the last line table entry that we should pay
835 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
836 unsigned endoffset
, /* offsets to line table */
837 CORE_ADDR startaddr
, /* offsets to line table */
838 CORE_ADDR endaddr
, unsigned *firstLine
)
840 struct objfile
*objfile
= this_symtab_objfile
;
841 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
842 unsigned int curoffset
;
845 struct internal_lineno int_lnno
;
846 unsigned int limit_offset
;
850 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
852 curoffset
= beginoffset
;
853 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
857 if (endoffset
>= limit_offset
)
859 complaint (&symfile_complaints
,
860 _("Bad line table offset in C_EINCL directive"));
863 limit_offset
= endoffset
;
868 abfd
= objfile
->obfd
;
869 linesz
= coff_data (abfd
)->local_linesz
;
870 ext_lnno
= alloca (linesz
);
872 while (curoffset
<= limit_offset
)
874 bfd_seek (abfd
, curoffset
, SEEK_SET
);
875 bfd_bread (ext_lnno
, linesz
, abfd
);
876 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
878 /* Find the address this line represents. */
879 addr
= (int_lnno
.l_lnno
880 ? int_lnno
.l_addr
.l_paddr
881 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
882 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
884 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
887 if (int_lnno
.l_lnno
== 0)
889 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
890 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
894 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
895 gdbarch_addr_bits_remove (gdbarch
, addr
));
901 /* Save the vital information for use when closing off the current file.
902 NAME is the file name the symbols came from, START_ADDR is the first
903 text address for the file, and SIZE is the number of bytes of text. */
905 #define complete_symtab(name, start_addr) { \
906 set_last_source_file (name); \
907 last_source_start_addr = start_addr; \
911 /* Refill the symbol table input buffer
912 and set the variables that control fetching entries from it.
913 Reports an error if no data available.
914 This function can read past the end of the symbol table
915 (into the string table) but this does no harm. */
917 /* Create a new minimal symbol (using record_with_info).
919 Creation of all new minimal symbols should go through this function
920 rather than calling the various record functions in order
921 to make sure that all symbol addresses get properly relocated.
925 NAME - the symbol's name (but if NAME starts with a period, that
926 leading period is discarded).
927 ADDRESS - the symbol's address, prior to relocation. This function
928 relocates the address before recording the minimal symbol.
929 MS_TYPE - the symbol's type.
930 N_SCNUM - the symbol's XCOFF section number.
931 OBJFILE - the objfile associated with the minimal symbol. */
934 record_minimal_symbol (minimal_symbol_reader
&reader
,
935 const char *name
, CORE_ADDR address
,
936 enum minimal_symbol_type ms_type
,
938 struct objfile
*objfile
)
943 reader
.record_with_info (name
, address
, ms_type
,
944 secnum_to_section (n_scnum
, objfile
));
947 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
948 nested. At any given time, a symbol can only be in one static block.
949 This is the base address of current static block, zero if non exists. */
951 static int static_block_base
= 0;
953 /* Section number for the current static block. */
955 static int static_block_section
= -1;
957 /* true if space for symbol name has been allocated. */
959 static int symname_alloced
= 0;
961 /* Next symbol to read. Pointer into raw seething symbol table. */
963 static char *raw_symbol
;
965 /* This is the function which stabsread.c calls to get symbol
969 xcoff_next_symbol_text (struct objfile
*objfile
)
971 struct internal_syment symbol
;
974 /* FIXME: is this the same as the passed arg? */
975 if (this_symtab_objfile
)
976 objfile
= this_symtab_objfile
;
978 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
981 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
983 /* Return something which points to '\0' and hope the symbol reading
984 code does something reasonable. */
987 else if (symbol
.n_sclass
& 0x80)
989 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
990 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
995 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
997 /* Return something which points to '\0' and hope the symbol reading
998 code does something reasonable. */
1004 /* Read symbols for a given partial symbol table. */
1007 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1009 bfd
*abfd
= objfile
->obfd
;
1010 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1011 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1012 char *strtbl
= xcoff
->strtbl
;
1013 char *debugsec
= xcoff
->debugsec
;
1014 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1016 struct internal_syment symbol
[1];
1017 union internal_auxent main_aux
;
1018 struct coff_symbol cs
[1];
1019 CORE_ADDR file_start_addr
= 0;
1020 CORE_ADDR file_end_addr
= 0;
1022 int next_file_symnum
= -1;
1023 unsigned int max_symnum
;
1024 int just_started
= 1;
1026 CORE_ADDR fcn_start_addr
= 0;
1028 struct coff_symbol fcn_stab_saved
= { 0 };
1030 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1031 union internal_auxent fcn_aux_saved
= main_aux
;
1032 struct context_stack
*newobj
;
1034 const char *filestring
= pst
->filename
; /* Name of the current file. */
1036 const char *last_csect_name
; /* Last seen csect's name. */
1038 this_symtab_psymtab
= pst
;
1039 this_symtab_objfile
= objfile
;
1041 /* Get the appropriate COFF "constants" related to the file we're
1043 local_symesz
= coff_data (abfd
)->local_symesz
;
1045 set_last_source_file (NULL
);
1046 last_csect_name
= 0;
1049 start_symtab (objfile
, filestring
, (char *) NULL
, file_start_addr
,
1051 record_debugformat (debugfmt
);
1052 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1054 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1055 first_object_file_end
= 0;
1057 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1059 while (symnum
< max_symnum
)
1061 QUIT
; /* make this command interruptable. */
1063 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1064 /* read one symbol into `cs' structure. After processing the
1065 whole symbol table, only string table will be kept in memory,
1066 symbol table and debug section of xcoff will be freed. Thus
1067 we can mark symbols with names in string table as
1072 /* Swap and align the symbol into a reasonable C structure. */
1073 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1075 cs
->c_symnum
= symnum
;
1076 cs
->c_naux
= symbol
->n_numaux
;
1077 if (symbol
->n_zeroes
)
1079 symname_alloced
= 0;
1080 /* We must use the original, unswapped, name here so the name field
1081 pointed to by cs->c_name will persist throughout xcoffread. If
1082 we use the new field, it gets overwritten for each symbol. */
1083 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1084 /* If it's exactly E_SYMNMLEN characters long it isn't
1086 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1090 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1092 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1093 p
[E_SYMNMLEN
] = '\0';
1095 symname_alloced
= 1;
1098 else if (symbol
->n_sclass
& 0x80)
1100 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1101 symname_alloced
= 0;
1105 /* in string table */
1106 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1107 symname_alloced
= 1;
1109 cs
->c_value
= symbol
->n_value
;
1110 cs
->c_sclass
= symbol
->n_sclass
;
1111 cs
->c_secnum
= symbol
->n_scnum
;
1112 cs
->c_type
= (unsigned) symbol
->n_type
;
1114 raw_symbol
+= local_symesz
;
1117 /* Save addr of first aux entry. */
1118 raw_auxptr
= raw_symbol
;
1120 /* Skip all the auxents associated with this symbol. */
1121 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1123 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1128 /* if symbol name starts with ".$" or "$", ignore it. */
1129 if (cs
->c_name
[0] == '$'
1130 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1133 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1135 if (get_last_source_file ())
1137 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1138 SECT_OFF_TEXT (objfile
));
1143 start_symtab (objfile
, "_globals_", (char *) NULL
, (CORE_ADDR
) 0,
1145 record_debugformat (debugfmt
);
1146 cur_src_end_addr
= first_object_file_end
;
1147 /* Done with all files, everything from here on is globals. */
1150 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1151 cs
->c_sclass
== C_WEAKEXT
)
1153 /* Dealing with a symbol with a csect entry. */
1155 #define CSECT(PP) ((PP)->x_csect)
1156 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1157 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1158 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1159 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1161 /* Convert the auxent to something we can access.
1162 XCOFF can have more than one auxiliary entries.
1164 Actual functions will have two auxiliary entries, one to have the
1165 function size and other to have the smtype/smclass (LD/PR).
1167 c_type value of main symbol table will be set only in case of
1168 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1169 Bit 10 of type is set if symbol is a function, ie the value is set
1170 to 32(0x20). So we need to read the first function auxiliay entry
1171 which contains the size. */
1172 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1174 /* a function entry point. */
1176 fcn_start_addr
= cs
->c_value
;
1178 /* save the function header info, which will be used
1179 when `.bf' is seen. */
1182 /* Convert the auxent to something we can access. */
1183 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1184 0, cs
->c_naux
, &fcn_aux_saved
);
1187 /* Read the csect auxiliary header, which is always the last by
1189 bfd_coff_swap_aux_in (abfd
,
1191 + ((coff_data (abfd
)->local_symesz
)
1192 * (cs
->c_naux
- 1)),
1193 cs
->c_type
, cs
->c_sclass
,
1194 cs
->c_naux
- 1, cs
->c_naux
,
1197 switch (CSECT_SMTYP (&main_aux
))
1201 /* Ignore all external references. */
1205 /* A section description. */
1207 switch (CSECT_SCLAS (&main_aux
))
1213 /* A program csect is seen. We have to allocate one
1214 symbol table for each program csect. Normally gdb
1215 prefers one symtab for each source file. In case
1216 of AIX, one source file might include more than one
1217 [PR] csect, and they don't have to be adjacent in
1218 terms of the space they occupy in memory. Thus, one
1219 single source file might get fragmented in the
1220 memory and gdb's file start and end address
1221 approach does not work! GCC (and I think xlc) seem
1222 to put all the code in the unnamed program csect. */
1224 if (last_csect_name
)
1226 complete_symtab (filestring
, file_start_addr
);
1227 cur_src_end_addr
= file_end_addr
;
1228 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1231 /* Give all csects for this source file the same
1233 start_symtab (objfile
, filestring
, NULL
,
1234 (CORE_ADDR
) 0, language_unknown
);
1235 record_debugformat (debugfmt
);
1238 /* If this is the very first csect seen,
1239 basically `__start'. */
1242 first_object_file_end
1243 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1248 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1249 SECT_OFF_TEXT (objfile
));
1250 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1252 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1253 last_csect_name
= cs
->c_name
;
1257 /* All other symbols are put into the minimal symbol
1270 /* Ignore the symbol. */
1278 switch (CSECT_SCLAS (&main_aux
))
1280 /* We never really come to this part as this case has been
1281 handled in ISFCN check above.
1282 This and other cases of XTY_LD are kept just for
1288 /* shared library function trampoline code entry point. */
1292 /* The symbols often have the same names as debug symbols for
1293 functions, and confuse lookup_symbol. */
1297 /* xlc puts each variable in a separate csect, so we get
1298 an XTY_SD for each variable. But gcc puts several
1299 variables in a csect, so that each variable only gets
1300 an XTY_LD. This will typically be XMC_RW; I suspect
1301 XMC_RO and XMC_BS might be possible too.
1302 These variables are put in the minimal symbol table
1309 /* Common symbols are put into the minimal symbol table only. */
1317 switch (cs
->c_sclass
)
1321 /* c_value field contains symnum of next .file entry in table
1322 or symnum of first global after last .file. */
1324 next_file_symnum
= cs
->c_value
;
1326 /* Complete symbol table for last object file containing
1327 debugging information. */
1329 /* Whether or not there was a csect in the previous file, we
1330 have to call `end_stabs' and `start_stabs' to reset
1331 type_vector, line_vector, etc. structures. */
1333 complete_symtab (filestring
, file_start_addr
);
1334 cur_src_end_addr
= file_end_addr
;
1335 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1338 /* XCOFF, according to the AIX 3.2 documentation, puts the
1339 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1340 do things the standard COFF way and put it in the auxent.
1341 We use the auxent if the symbol is ".file" and an auxent
1342 exists, otherwise use the symbol itself. Simple
1344 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1346 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1347 0, cs
->c_naux
, &main_aux
);
1348 filestring
= coff_getfilename (&main_aux
, objfile
);
1351 filestring
= cs
->c_name
;
1354 start_symtab (objfile
, filestring
, (char *) NULL
, (CORE_ADDR
) 0,
1356 record_debugformat (debugfmt
);
1357 last_csect_name
= 0;
1359 /* reset file start and end addresses. A compilation unit
1360 with no text (only data) should have zero file
1362 file_start_addr
= file_end_addr
= 0;
1366 fcn_stab_saved
= *cs
;
1370 if (strcmp (cs
->c_name
, ".bf") == 0)
1372 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1373 SECT_OFF_TEXT (objfile
));
1375 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1376 0, cs
->c_naux
, &main_aux
);
1378 within_function
= 1;
1380 newobj
= push_context (0, fcn_start_addr
+ off
);
1382 newobj
->name
= define_symbol
1383 (fcn_cs_saved
.c_value
+ off
,
1384 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1385 if (newobj
->name
!= NULL
)
1386 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1388 else if (strcmp (cs
->c_name
, ".ef") == 0)
1390 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1391 0, cs
->c_naux
, &main_aux
);
1393 /* The value of .ef is the address of epilogue code;
1394 not useful for gdb. */
1395 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1396 contains number of lines to '}' */
1398 if (context_stack_depth
<= 0)
1399 { /* We attempted to pop an empty context stack. */
1400 ef_complaint (cs
->c_symnum
);
1401 within_function
= 0;
1404 newobj
= pop_context ();
1405 /* Stack must be empty now. */
1406 if (context_stack_depth
> 0 || newobj
== NULL
)
1408 ef_complaint (cs
->c_symnum
);
1409 within_function
= 0;
1413 finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
1414 NULL
, newobj
->start_addr
,
1415 (fcn_cs_saved
.c_value
1416 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1417 + ANOFFSET (objfile
->section_offsets
,
1418 SECT_OFF_TEXT (objfile
))));
1419 within_function
= 0;
1424 /* Begin static block. */
1426 struct internal_syment symbol
;
1428 read_symbol (&symbol
, cs
->c_value
);
1429 static_block_base
= symbol
.n_value
;
1430 static_block_section
=
1431 secnum_to_section (symbol
.n_scnum
, objfile
);
1436 /* End of static block. */
1437 static_block_base
= 0;
1438 static_block_section
= -1;
1449 complaint (&symfile_complaints
,
1450 _("Unrecognized storage class %d."),
1465 /* beginning of include file */
1466 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1467 order. Thus, when wee see them, we might not know enough info
1468 to process them. Thus, we'll be saving them into a table
1469 (inclTable) and postpone their processing. */
1471 record_include_begin (cs
);
1475 /* End of include file. */
1476 /* See the comment after case C_BINCL. */
1477 record_include_end (cs
);
1481 if (strcmp (cs
->c_name
, ".bb") == 0)
1484 newobj
= push_context (depth
,
1486 + ANOFFSET (objfile
->section_offsets
,
1487 SECT_OFF_TEXT (objfile
))));
1489 else if (strcmp (cs
->c_name
, ".eb") == 0)
1491 if (context_stack_depth
<= 0)
1492 { /* We attempted to pop an empty context stack. */
1493 eb_complaint (cs
->c_symnum
);
1496 newobj
= pop_context ();
1497 if (depth
-- != newobj
->depth
)
1499 eb_complaint (cs
->c_symnum
);
1502 if (local_symbols
&& context_stack_depth
> 0)
1504 /* Make a block for the local symbols within. */
1505 finish_block (newobj
->name
, &local_symbols
,
1506 newobj
->old_blocks
, NULL
,
1509 + ANOFFSET (objfile
->section_offsets
,
1510 SECT_OFF_TEXT (objfile
))));
1512 local_symbols
= newobj
->locals
;
1517 process_xcoff_symbol (cs
, objfile
);
1522 if (get_last_source_file ())
1524 struct compunit_symtab
*cust
;
1526 complete_symtab (filestring
, file_start_addr
);
1527 cur_src_end_addr
= file_end_addr
;
1528 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1529 /* When reading symbols for the last C_FILE of the objfile, try
1530 to make sure that we set pst->compunit_symtab to the symtab for the
1531 file, not to the _globals_ symtab. I'm not sure whether this
1532 actually works right or when/if it comes up. */
1533 if (pst
->compunit_symtab
== NULL
)
1534 pst
->compunit_symtab
= cust
;
1539 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1540 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1541 *(SYMBOL2) = *(SYMBOL1);
1544 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1545 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1546 (NAME), strlen (NAME)))
1549 /* process one xcoff symbol. */
1551 static struct symbol
*
1552 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1554 struct symbol onesymbol
;
1555 struct symbol
*sym
= &onesymbol
;
1556 struct symbol
*sym2
= NULL
;
1562 if (cs
->c_secnum
< 0)
1564 /* The value is a register number, offset within a frame, etc.,
1565 and does not get relocated. */
1571 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1572 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1579 initialize_objfile_symbol (sym
);
1581 /* default assumptions */
1582 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1583 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1584 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1586 if (ISFCN (cs
->c_type
))
1588 /* At this point, we don't know the type of the function. This
1589 will be patched with the type from its stab entry later on in
1590 patch_block_stabs (), unless the file was compiled without -g. */
1592 SYMBOL_SET_LINKAGE_NAME (sym
, ((const char *)
1593 SYMNAME_ALLOC (name
, symname_alloced
)));
1594 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1596 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1597 SYMBOL_DUP (sym
, sym2
);
1599 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1600 add_symbol_to_list (sym2
, &global_symbols
);
1601 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1602 add_symbol_to_list (sym2
, &file_symbols
);
1606 /* In case we can't figure out the type, provide default. */
1607 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1609 switch (cs
->c_sclass
)
1612 /* The values of functions and global symbols are now resolved
1613 via the global_sym_chain in stabsread.c. */
1615 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1616 add_stab_to_list (name
, &global_stabs
);
1618 add_stab_to_list (name
, &file_stabs
);
1622 add_stab_to_list (name
, &global_stabs
);
1627 common_block_start (cs
->c_name
, objfile
);
1631 common_block_end (objfile
);
1635 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1648 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1651 SYMBOL_SECTION (sym
) = sec
;
1658 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1659 all statics and we need to distinguish file-scope versus
1660 function-scope using within_function. We do this by
1661 changing the string we pass to define_symbol to use 'S'
1662 where we need to, which is not necessarily super-clean,
1663 but seems workable enough. */
1668 pp
= strchr (name
, ':');
1673 if (*pp
== 'V' && !within_function
)
1675 sym
= define_symbol ((cs
->c_value
1676 + ANOFFSET (objfile
->section_offsets
,
1677 static_block_section
)),
1678 cs
->c_name
, 0, 0, objfile
);
1681 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1682 SYMBOL_SECTION (sym
) = static_block_section
;
1691 /* Extract the file name from the aux entry of a C_FILE symbol.
1692 Result is in static storage and is only good for temporary use. */
1695 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1697 static char buffer
[BUFSIZ
];
1699 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1700 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1701 + aux_entry
->x_file
.x_n
.x_offset
));
1704 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1705 buffer
[FILNMLEN
] = '\0';
1710 /* Set *SYMBOL to symbol number symno in symtbl. */
1712 read_symbol (struct internal_syment
*symbol
, int symno
)
1714 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1715 int nsyms
= xcoff
->symtbl_num_syms
;
1716 char *stbl
= xcoff
->symtbl
;
1718 if (symno
< 0 || symno
>= nsyms
)
1720 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1721 symbol
->n_value
= 0;
1722 symbol
->n_scnum
= -1;
1725 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1726 stbl
+ (symno
* local_symesz
),
1730 /* Get value corresponding to symbol number symno in symtbl. */
1733 read_symbol_nvalue (int symno
)
1735 struct internal_syment symbol
[1];
1737 read_symbol (symbol
, symno
);
1738 return symbol
->n_value
;
1742 /* Find the address of the function corresponding to symno, where
1743 symno is the symbol pointed to by the linetable. */
1746 read_symbol_lineno (int symno
)
1748 struct objfile
*objfile
= this_symtab_objfile
;
1749 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1751 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1752 int nsyms
= info
->symtbl_num_syms
;
1753 char *stbl
= info
->symtbl
;
1754 char *strtbl
= info
->strtbl
;
1756 struct internal_syment symbol
[1];
1757 union internal_auxent main_aux
[1];
1761 bf_notfound_complaint ();
1765 /* Note that just searching for a short distance (e.g. 50 symbols)
1766 is not enough, at least in the following case.
1769 [many .stabx entries]
1770 [a few functions, referring to foo]
1774 What happens here is that the assembler moves the .stabx entries
1775 to right before the ".bf" for foo, but the symbol for "foo" is before
1776 all the stabx entries. See PR gdb/2222. */
1778 /* Maintaining a table of .bf entries might be preferable to this search.
1779 If I understand things correctly it would need to be done only for
1780 the duration of a single psymtab to symtab conversion. */
1781 while (symno
< nsyms
)
1783 bfd_coff_swap_sym_in (symfile_bfd
,
1784 stbl
+ (symno
* local_symesz
), symbol
);
1785 if (symbol
->n_sclass
== C_FCN
)
1787 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1789 if (strcmp (name
, ".bf") == 0)
1792 symno
+= symbol
->n_numaux
+ 1;
1795 bf_notfound_complaint ();
1799 /* Take aux entry and return its lineno. */
1801 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1802 symbol
->n_type
, symbol
->n_sclass
,
1803 0, symbol
->n_numaux
, main_aux
);
1805 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1808 /* Support for line number handling. */
1810 /* This function is called for every section; it finds the outer limits
1811 * of the line table (minimum and maximum file offset) so that the
1812 * mainline code can read the whole thing for efficiency.
1815 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1817 struct coff_symfile_info
*info
;
1819 file_ptr offset
, maxoff
;
1821 count
= asect
->lineno_count
;
1823 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1826 size
= count
* coff_data (abfd
)->local_linesz
;
1827 info
= (struct coff_symfile_info
*) vpinfo
;
1828 offset
= asect
->line_filepos
;
1829 maxoff
= offset
+ size
;
1831 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1832 info
->min_lineno_offset
= offset
;
1834 if (maxoff
> info
->max_lineno_offset
)
1835 info
->max_lineno_offset
= maxoff
;
1839 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1849 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1854 /* Read in all partial symtabs on which this one is dependent. */
1855 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1856 if (!pst
->dependencies
[i
]->readin
)
1858 /* Inform about additional files that need to be read in. */
1861 fputs_filtered (" ", gdb_stdout
);
1863 fputs_filtered ("and ", gdb_stdout
);
1865 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1866 wrap_here (""); /* Flush output */
1867 gdb_flush (gdb_stdout
);
1869 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1872 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1874 /* Init stuff necessary for reading in symbols. */
1878 scoped_free_pendings free_pending
;
1879 read_xcoff_symtab (objfile
, pst
);
1885 /* Read in all of the symbols for a given psymtab for real.
1886 Be verbose about it if the user wants that. SELF is not NULL. */
1889 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1894 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1899 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1900 || self
->number_of_dependencies
)
1902 /* Print the message now, before reading the string table,
1903 to avoid disconcerting pauses. */
1906 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1907 gdb_flush (gdb_stdout
);
1910 next_symbol_text_func
= xcoff_next_symbol_text
;
1912 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1914 /* Match with global symbols. This only needs to be done once,
1915 after all of the symtabs and dependencies have been read in. */
1916 scan_file_globals (objfile
);
1918 /* Finish up the debug error message. */
1920 printf_filtered ("done.\n");
1925 xcoff_new_init (struct objfile
*objfile
)
1927 stabsread_new_init ();
1928 buildsym_new_init ();
1931 /* Do initialization in preparation for reading symbols from OBJFILE.
1933 We will only be called if this is an XCOFF or XCOFF-like file.
1934 BFD handles figuring out the format of the file, and code in symfile.c
1935 uses BFD's determination to vector to us. */
1938 xcoff_symfile_init (struct objfile
*objfile
)
1940 struct coff_symfile_info
*xcoff
;
1942 /* Allocate struct to keep track of the symfile. */
1943 xcoff
= XNEW (struct coff_symfile_info
);
1944 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1946 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1947 find this causes a significant slowdown in gdb then we could
1948 set it in the debug symbol readers only when necessary. */
1949 objfile
->flags
|= OBJF_REORDERED
;
1952 /* Perform any local cleanups required when we are done with a particular
1953 objfile. I.E, we are in the process of discarding all symbol information
1954 for an objfile, freeing up all memory held for it, and unlinking the
1955 objfile struct from the global list of known objfiles. */
1958 xcoff_symfile_finish (struct objfile
*objfile
)
1960 /* Start with a fresh include table for the next objfile. */
1966 inclIndx
= inclLength
= inclDepth
= 0;
1968 dwarf2_free_objfile (objfile
);
1973 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1977 unsigned char lengthbuf
[4];
1979 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1981 xcoff
->strtbl
= NULL
;
1983 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1984 error (_("cannot seek to string table in %s: %s"),
1985 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1987 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1988 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1990 /* If no string table is needed, then the file may end immediately
1991 after the symbols. Just return with `strtbl' set to NULL. */
1993 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1996 /* Allocate string table from objfile_obstack. We will need this table
1997 as long as we have its symbol table around. */
1999 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
2000 xcoff
->strtbl
= strtbl
;
2002 /* Copy length buffer, the first byte is usually zero and is
2003 used for stabs with a name length of zero. */
2004 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
2005 if (length
== sizeof lengthbuf
)
2008 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
2010 if (val
!= length
- sizeof lengthbuf
)
2011 error (_("cannot read string table from %s: %s"),
2012 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
2013 if (strtbl
[length
- 1] != '\0')
2014 error (_("bad symbol file: string table "
2015 "does not end with null character"));
2020 /* If we have not yet seen a function for this psymtab, this is 0. If we
2021 have seen one, it is the offset in the line numbers of the line numbers
2023 static unsigned int first_fun_line_offset
;
2025 /* Allocate and partially fill a partial symtab. It will be
2026 completely filled at the end of the symbol list.
2028 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2029 is the address relative to which its symbols are (incremental) or 0
2032 static struct partial_symtab
*
2033 xcoff_start_psymtab (struct objfile
*objfile
,
2034 const char *filename
, int first_symnum
,
2035 std::vector
<partial_symbol
*> &global_psymbols
,
2036 std::vector
<partial_symbol
*> &static_psymbols
)
2038 struct partial_symtab
*result
=
2039 start_psymtab_common (objfile
,
2041 /* We fill in textlow later. */
2043 global_psymbols
, static_psymbols
);
2045 result
->read_symtab_private
=
2046 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2047 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2048 result
->read_symtab
= xcoff_read_symtab
;
2050 /* Deduce the source language from the filename for this psymtab. */
2051 psymtab_language
= deduce_language_from_filename (filename
);
2056 /* Close off the current usage of PST.
2057 Returns PST, or NULL if the partial symtab was empty and thrown away.
2059 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2061 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2062 are the information for includes and dependencies. */
2064 static struct partial_symtab
*
2065 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2066 const char **include_list
, int num_includes
,
2067 int capping_symbol_number
,
2068 struct partial_symtab
**dependency_list
,
2069 int number_dependencies
, int textlow_not_set
)
2073 if (capping_symbol_number
!= -1)
2074 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2075 capping_symbol_number
2076 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2077 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2078 first_fun_line_offset
;
2079 first_fun_line_offset
= 0;
2081 end_psymtab_common (objfile
, pst
);
2083 pst
->number_of_dependencies
= number_dependencies
;
2084 if (number_dependencies
)
2086 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2087 struct partial_symtab
*,
2088 number_dependencies
);
2089 memcpy (pst
->dependencies
, dependency_list
,
2090 number_dependencies
* sizeof (struct partial_symtab
*));
2093 pst
->dependencies
= 0;
2095 for (i
= 0; i
< num_includes
; i
++)
2097 struct partial_symtab
*subpst
=
2098 allocate_psymtab (include_list
[i
], objfile
);
2100 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2101 sizeof (struct symloc
));
2102 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2103 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2104 subpst
->textlow
= 0;
2105 subpst
->texthigh
= 0;
2107 /* We could save slight bits of space by only making one of these,
2108 shared by the entire set of include files. FIXME-someday. */
2109 subpst
->dependencies
=
2110 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2111 subpst
->dependencies
[0] = pst
;
2112 subpst
->number_of_dependencies
= 1;
2114 subpst
->globals_offset
=
2115 subpst
->n_global_syms
=
2116 subpst
->statics_offset
=
2117 subpst
->n_static_syms
= 0;
2120 subpst
->compunit_symtab
= NULL
;
2121 subpst
->read_symtab
= pst
->read_symtab
;
2124 if (num_includes
== 0
2125 && number_dependencies
== 0
2126 && pst
->n_global_syms
== 0
2127 && pst
->n_static_syms
== 0)
2129 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2130 it is on the obstack, but we can forget to chain it on the list. */
2131 /* Empty psymtabs happen as a result of header files which don't have
2132 any symbols in them. There can be a lot of them. */
2134 discard_psymtab (objfile
, pst
);
2136 /* Indicate that psymtab was thrown away. */
2142 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2143 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2144 the symbol and its auxents. */
2147 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2148 const char **name
, char **raw
, unsigned int *symnump
,
2149 struct objfile
*objfile
)
2151 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2152 if (symbol
->n_zeroes
)
2154 /* If it's exactly E_SYMNMLEN characters long it isn't
2156 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2158 /* FIXME: wastes memory for symbols which we don't end up putting
2159 into the minimal symbols. */
2162 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2164 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2165 p
[E_SYMNMLEN
] = '\0';
2169 /* Point to the unswapped name as that persists as long as the
2171 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2173 else if (symbol
->n_sclass
& 0x80)
2175 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2179 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2182 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2183 if (symbol
->n_numaux
> 0)
2185 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2186 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2188 *symnump
+= symbol
->n_numaux
;
2189 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2194 function_outside_compilation_unit_complaint (const char *arg1
)
2196 complaint (&symfile_complaints
,
2197 _("function `%s' appears to be defined "
2198 "outside of all compilation units"),
2203 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2204 struct objfile
*objfile
)
2206 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2207 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2208 const char *filestring
= NULL
;
2210 const char *namestring
;
2215 /* Current partial symtab */
2216 struct partial_symtab
*pst
;
2218 /* List of current psymtab's include files. */
2219 const char **psymtab_include_list
;
2220 int includes_allocated
;
2223 /* Index within current psymtab dependency list. */
2224 struct partial_symtab
**dependency_list
;
2225 int dependencies_used
, dependencies_allocated
;
2228 struct internal_syment symbol
;
2229 union internal_auxent main_aux
[5];
2230 unsigned int ssymnum
;
2232 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2233 CORE_ADDR last_csect_val
= 0;
2234 int last_csect_sec
= 0;
2235 int misc_func_recorded
= 0; /* true if any misc. function. */
2236 int textlow_not_set
= 1;
2238 pst
= (struct partial_symtab
*) 0;
2240 includes_allocated
= 30;
2242 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2243 sizeof (const char *));
2245 dependencies_allocated
= 30;
2246 dependencies_used
= 0;
2248 (struct partial_symtab
**) alloca (dependencies_allocated
*
2249 sizeof (struct partial_symtab
*));
2251 set_last_source_file (NULL
);
2253 abfd
= objfile
->obfd
;
2254 next_symbol_text_func
= xcoff_next_symbol_text
;
2256 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2257 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2259 while (ssymnum
< nsyms
)
2265 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2266 sclass
= symbol
.n_sclass
;
2274 /* The CSECT auxent--always the last auxent. */
2275 union internal_auxent csect_aux
;
2276 unsigned int symnum_before
= ssymnum
;
2278 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2280 if (symbol
.n_numaux
> 1)
2282 bfd_coff_swap_aux_in
2284 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2287 symbol
.n_numaux
- 1,
2292 csect_aux
= main_aux
[0];
2294 /* If symbol name starts with ".$" or "$", ignore it. */
2295 if (namestring
[0] == '$'
2296 || (namestring
[0] == '.' && namestring
[1] == '$'))
2299 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2302 switch (csect_aux
.x_csect
.x_smclas
)
2305 if (last_csect_name
)
2307 /* If no misc. function recorded in the last
2308 seen csect, enter it as a function. This
2309 will take care of functions like strcmp()
2312 if (!misc_func_recorded
)
2314 record_minimal_symbol
2315 (reader
, last_csect_name
, last_csect_val
,
2316 mst_text
, last_csect_sec
, objfile
);
2317 misc_func_recorded
= 1;
2322 /* We have to allocate one psymtab for
2323 each program csect, because their text
2324 sections need not be adjacent. */
2326 (objfile
, pst
, psymtab_include_list
,
2327 includes_used
, symnum_before
, dependency_list
,
2328 dependencies_used
, textlow_not_set
);
2330 dependencies_used
= 0;
2331 /* Give all psymtabs for this source file the same
2333 pst
= xcoff_start_psymtab
2337 objfile
->global_psymbols
,
2338 objfile
->static_psymbols
);
2341 /* Activate the misc_func_recorded mechanism for
2342 compiler- and linker-generated CSECTs like ".strcmp"
2344 if (namestring
&& (namestring
[0] == '.'
2345 || namestring
[0] == '@'))
2347 last_csect_name
= namestring
;
2348 last_csect_val
= symbol
.n_value
;
2349 last_csect_sec
= symbol
.n_scnum
;
2354 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2356 if (highval
> pst
->texthigh
)
2357 pst
->texthigh
= highval
;
2358 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2359 pst
->textlow
= symbol
.n_value
;
2361 misc_func_recorded
= 0;
2366 /* Data variables are recorded in the minimal symbol
2367 table, except for section symbols. */
2368 if (*namestring
!= '.')
2369 record_minimal_symbol
2370 (reader
, namestring
, symbol
.n_value
,
2371 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2372 symbol
.n_scnum
, objfile
);
2377 warning (_("More than one XMC_TC0 symbol found."));
2378 toc_offset
= symbol
.n_value
;
2380 /* Make TOC offset relative to start address of
2382 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2384 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2388 /* These symbols tell us where the TOC entry for a
2389 variable is, not the variable itself. */
2398 switch (csect_aux
.x_csect
.x_smclas
)
2401 /* A function entry point. */
2403 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2404 first_fun_line_offset
=
2405 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2407 record_minimal_symbol
2408 (reader
, namestring
, symbol
.n_value
,
2409 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2410 symbol
.n_scnum
, objfile
);
2411 misc_func_recorded
= 1;
2415 /* shared library function trampoline code entry
2418 /* record trampoline code entries as
2419 mst_solib_trampoline symbol. When we lookup mst
2420 symbols, we will choose mst_text over
2421 mst_solib_trampoline. */
2422 record_minimal_symbol
2423 (reader
, namestring
, symbol
.n_value
,
2424 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2425 misc_func_recorded
= 1;
2429 /* The symbols often have the same names as
2430 debug symbols for functions, and confuse
2436 /* xlc puts each variable in a separate csect,
2437 so we get an XTY_SD for each variable. But
2438 gcc puts several variables in a csect, so
2439 that each variable only gets an XTY_LD. We
2440 still need to record them. This will
2441 typically be XMC_RW; I suspect XMC_RO and
2442 XMC_BS might be possible too. */
2443 if (*namestring
!= '.')
2444 record_minimal_symbol
2445 (reader
, namestring
, symbol
.n_value
,
2446 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2447 symbol
.n_scnum
, objfile
);
2453 switch (csect_aux
.x_csect
.x_smclas
)
2457 /* Common variables are recorded in the minimal symbol
2458 table, except for section symbols. */
2459 if (*namestring
!= '.')
2460 record_minimal_symbol
2461 (reader
, namestring
, symbol
.n_value
,
2462 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2463 symbol
.n_scnum
, objfile
);
2475 unsigned int symnum_before
;
2477 symnum_before
= ssymnum
;
2478 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2481 /* See if the last csect needs to be recorded. */
2483 if (last_csect_name
&& !misc_func_recorded
)
2485 /* If no misc. function recorded in the last seen csect, enter
2486 it as a function. This will take care of functions like
2487 strcmp() compiled by xlc. */
2489 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2490 mst_text
, last_csect_sec
, objfile
);
2491 misc_func_recorded
= 1;
2496 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2497 includes_used
, symnum_before
,
2498 dependency_list
, dependencies_used
,
2501 dependencies_used
= 0;
2503 first_fun_line_offset
= 0;
2505 /* XCOFF, according to the AIX 3.2 documentation, puts the
2506 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2507 do things the standard COFF way and put it in the auxent.
2508 We use the auxent if the symbol is ".file" and an auxent
2509 exists, otherwise use the symbol itself. */
2510 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2512 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2515 filestring
= namestring
;
2517 pst
= xcoff_start_psymtab (objfile
,
2520 objfile
->global_psymbols
,
2521 objfile
->static_psymbols
);
2522 last_csect_name
= NULL
;
2528 complaint (&symfile_complaints
,
2529 _("Storage class %d not recognized during scan"),
2534 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2535 to handle only the C_FUN and C_EXT. */
2550 /* C_EINCL means we are switching back to the main file. But there
2551 is no reason to care; the only thing we want to know about
2552 includes is the names of all the included (.h) files. */
2557 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2561 /* I don't think the name of the common block (as opposed to the
2562 variables within it) is something which is user visible
2570 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2571 so C_LSYM would appear to be only for locals. */
2577 /* We probably could save a few instructions by assuming that
2578 C_LSYM, C_PSYM, etc., never have auxents. */
2579 int naux1
= symbol
.n_numaux
+ 1;
2582 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2588 /* Mark down an include file in the current psymtab. */
2589 enum language tmp_language
;
2591 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2594 tmp_language
= deduce_language_from_filename (namestring
);
2596 /* Only change the psymtab's language if we've learned
2597 something useful (eg. tmp_language is not language_unknown).
2598 In addition, to match what start_subfile does, never change
2600 if (tmp_language
!= language_unknown
2601 && (tmp_language
!= language_c
2602 || psymtab_language
!= language_cplus
))
2603 psymtab_language
= tmp_language
;
2605 /* In C++, one may expect the same filename to come round many
2606 times, when code is coming alternately from the main file
2607 and from inline functions in other files. So I check to see
2608 if this is a file we've seen before -- either the main
2609 source file, or a previously included file.
2611 This seems to be a lot of time to be spending on N_SOL, but
2612 things like "break c-exp.y:435" need to work (I
2613 suppose the psymtab_include_list could be hashed or put
2614 in a binary tree, if profiling shows this is a major hog). */
2615 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2621 for (i
= 0; i
< includes_used
; i
++)
2622 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2630 psymtab_include_list
[includes_used
++] = namestring
;
2631 if (includes_used
>= includes_allocated
)
2633 const char **orig
= psymtab_include_list
;
2635 psymtab_include_list
= (const char **)
2636 alloca ((includes_allocated
*= 2) *
2637 sizeof (const char *));
2638 memcpy (psymtab_include_list
, orig
,
2639 includes_used
* sizeof (const char *));
2644 /* The value of the C_FUN is not the address of the function (it
2645 appears to be the address before linking), but as long as it
2646 is smaller than the actual address, then find_pc_partial_function
2647 will use the minimal symbols instead. I hope. */
2656 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2659 p
= strchr (namestring
, ':');
2661 continue; /* Not a debugging symbol. */
2663 /* Main processing section for debugging symbols which
2664 the initial read through the symbol tables needs to worry
2665 about. If we reach this point, the symbol which we are
2666 considering is definitely one we are interested in.
2667 p must also contain the (valid) index into the namestring
2668 which indicates the debugging type symbol. */
2673 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2674 SECT_OFF_DATA (objfile
));
2676 if (gdbarch_static_transform_name_p (gdbarch
))
2677 namestring
= gdbarch_static_transform_name
2678 (gdbarch
, namestring
);
2680 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2681 VAR_DOMAIN
, LOC_STATIC
,
2682 &objfile
->static_psymbols
,
2684 psymtab_language
, objfile
);
2688 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2689 SECT_OFF_DATA (objfile
));
2690 /* The addresses in these entries are reported to be
2691 wrong. See the code that reads 'G's for symtabs. */
2692 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2693 VAR_DOMAIN
, LOC_STATIC
,
2694 &objfile
->global_psymbols
,
2696 psymtab_language
, objfile
);
2700 /* When a 'T' entry is defining an anonymous enum, it
2701 may have a name which is the empty string, or a
2702 single space. Since they're not really defining a
2703 symbol, those shouldn't go in the partial symbol
2704 table. We do pick up the elements of such enums at
2705 'check_enum:', below. */
2706 if (p
>= namestring
+ 2
2707 || (p
== namestring
+ 1
2708 && namestring
[0] != ' '))
2710 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2711 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2712 &objfile
->static_psymbols
,
2713 0, psymtab_language
, objfile
);
2716 /* Also a typedef with the same name. */
2717 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2718 VAR_DOMAIN
, LOC_TYPEDEF
,
2719 &objfile
->static_psymbols
,
2720 0, psymtab_language
, objfile
);
2727 if (p
!= namestring
) /* a name is there, not just :T... */
2729 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2730 VAR_DOMAIN
, LOC_TYPEDEF
,
2731 &objfile
->static_psymbols
,
2732 0, psymtab_language
, objfile
);
2735 /* If this is an enumerated type, we need to
2736 add all the enum constants to the partial symbol
2737 table. This does not cover enums without names, e.g.
2738 "enum {a, b} c;" in C, but fortunately those are
2739 rare. There is no way for GDB to find those from the
2740 enum type without spending too much time on it. Thus
2741 to solve this problem, the compiler needs to put out the
2742 enum in a nameless type. GCC2 does this. */
2744 /* We are looking for something of the form
2745 <name> ":" ("t" | "T") [<number> "="] "e"
2746 {<constant> ":" <value> ","} ";". */
2748 /* Skip over the colon and the 't' or 'T'. */
2750 /* This type may be given a number. Also, numbers can come
2751 in pairs like (0,26). Skip over it. */
2752 while ((*p
>= '0' && *p
<= '9')
2753 || *p
== '(' || *p
== ',' || *p
== ')'
2759 /* The aix4 compiler emits extra crud before the
2763 /* Skip over the type (?). */
2767 /* Skip over the colon. */
2771 /* We have found an enumerated type. */
2772 /* According to comments in read_enum_type
2773 a comma could end it instead of a semicolon.
2774 I don't know where that happens.
2776 while (*p
&& *p
!= ';' && *p
!= ',')
2780 /* Check for and handle cretinous dbx symbol name
2782 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2783 p
= next_symbol_text (objfile
);
2785 /* Point to the character after the name
2786 of the enum constant. */
2787 for (q
= p
; *q
&& *q
!= ':'; q
++)
2789 /* Note that the value doesn't matter for
2790 enum constants in psymtabs, just in symtabs. */
2791 add_psymbol_to_list (p
, q
- p
, 1,
2792 VAR_DOMAIN
, LOC_CONST
,
2793 &objfile
->static_psymbols
,
2794 0, psymtab_language
, objfile
);
2795 /* Point past the name. */
2797 /* Skip over the value. */
2798 while (*p
&& *p
!= ',')
2800 /* Advance past the comma. */
2808 /* Constant, e.g. from "const" in Pascal. */
2809 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2810 VAR_DOMAIN
, LOC_CONST
,
2811 &objfile
->static_psymbols
,
2812 0, psymtab_language
, objfile
);
2818 int name_len
= p
- namestring
;
2819 char *name
= (char *) xmalloc (name_len
+ 1);
2821 memcpy (name
, namestring
, name_len
);
2822 name
[name_len
] = '\0';
2823 function_outside_compilation_unit_complaint (name
);
2826 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2827 SECT_OFF_TEXT (objfile
));
2828 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2829 VAR_DOMAIN
, LOC_BLOCK
,
2830 &objfile
->static_psymbols
,
2832 psymtab_language
, objfile
);
2835 /* Global functions were ignored here, but now they
2836 are put into the global psymtab like one would expect.
2837 They're also in the minimal symbol table. */
2841 int name_len
= p
- namestring
;
2842 char *name
= (char *) xmalloc (name_len
+ 1);
2844 memcpy (name
, namestring
, name_len
);
2845 name
[name_len
] = '\0';
2846 function_outside_compilation_unit_complaint (name
);
2850 /* We need only the minimal symbols for these
2851 loader-generated definitions. Keeping the global
2852 symbols leads to "in psymbols but not in symbols"
2854 if (startswith (namestring
, "@FIX"))
2857 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2858 SECT_OFF_TEXT (objfile
));
2859 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2860 VAR_DOMAIN
, LOC_BLOCK
,
2861 &objfile
->global_psymbols
,
2863 psymtab_language
, objfile
);
2866 /* Two things show up here (hopefully); static symbols of
2867 local scope (static used inside braces) or extensions
2868 of structure symbols. We can ignore both. */
2882 case '#': /* For symbol identification (used in
2887 /* It is a C++ nested symbol. We don't need to record it
2888 (I don't think); if we try to look up foo::bar::baz,
2889 then symbols for the symtab containing foo should get
2890 read in, I think. */
2891 /* Someone says sun cc puts out symbols like
2892 /foo/baz/maclib::/usr/local/bin/maclib,
2893 which would get here with a symbol type of ':'. */
2897 /* Unexpected symbol descriptor. The second and
2898 subsequent stabs of a continued stab can show up
2899 here. The question is whether they ever can mimic
2900 a normal stab--it would be nice if not, since we
2901 certainly don't want to spend the time searching to
2902 the end of every string looking for a
2905 complaint (&symfile_complaints
,
2906 _("unknown symbol descriptor `%c'"), p
[1]);
2908 /* Ignore it; perhaps it is an extension that we don't
2918 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2919 ssymnum
, dependency_list
,
2920 dependencies_used
, textlow_not_set
);
2923 /* Record the toc offset value of this symbol table into objfile
2924 structure. If no XMC_TC0 is found, toc_offset should be zero.
2925 Another place to obtain this information would be file auxiliary
2928 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2931 /* Return the toc offset value for a given objfile. */
2934 xcoff_get_toc_offset (struct objfile
*objfile
)
2937 return XCOFF_DATA (objfile
)->toc_offset
;
2941 /* Scan and build partial symbols for a symbol file.
2942 We have been initialized by a call to dbx_symfile_init, which
2943 put all the relevant info into a "struct dbx_symfile_info",
2944 hung off the objfile structure.
2946 SECTION_OFFSETS contains offsets relative to which the symbols in the
2947 various sections are (depending where the sections were actually
2951 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2955 int num_symbols
; /* # of symbols */
2956 file_ptr symtab_offset
; /* symbol table and */
2957 file_ptr stringtab_offset
; /* string table file offsets */
2958 struct coff_symfile_info
*info
;
2962 info
= XCOFF_DATA (objfile
);
2963 symfile_bfd
= abfd
= objfile
->obfd
;
2964 name
= objfile_name (objfile
);
2966 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2967 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2968 stringtab_offset
= symtab_offset
+
2969 num_symbols
* coff_data (abfd
)->local_symesz
;
2971 info
->min_lineno_offset
= 0;
2972 info
->max_lineno_offset
= 0;
2973 bfd_map_over_sections (abfd
, find_linenos
, info
);
2975 if (num_symbols
> 0)
2977 /* Read the string table. */
2978 init_stringtab (abfd
, stringtab_offset
, objfile
);
2980 /* Read the .debug section, if present and if we're not ignoring
2982 if (!(objfile
->flags
& OBJF_READNEVER
))
2984 struct bfd_section
*secp
;
2985 bfd_size_type length
;
2986 bfd_byte
*debugsec
= NULL
;
2988 secp
= bfd_get_section_by_name (abfd
, ".debug");
2991 length
= bfd_section_size (abfd
, secp
);
2995 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2998 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
3000 error (_("Error reading .debug section of `%s': %s"),
3001 name
, bfd_errmsg (bfd_get_error ()));
3005 info
->debugsec
= (char *) debugsec
;
3009 /* Read the symbols. We keep them in core because we will want to
3010 access them randomly in read_symbol*. */
3011 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
3013 error (_("Error reading symbols from %s: %s"),
3014 name
, bfd_errmsg (bfd_get_error ()));
3015 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
3016 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
3017 info
->symtbl_num_syms
= num_symbols
;
3019 val
= bfd_bread (info
->symtbl
, size
, abfd
);
3021 perror_with_name (_("reading symbol table"));
3023 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3024 if (objfile
->global_psymbols
.capacity () == 0
3025 && objfile
->static_psymbols
.capacity () == 0)
3026 /* I'm not sure how how good num_symbols is; the rule of thumb in
3027 init_psymbol_list was developed for a.out. On the one hand,
3028 num_symbols includes auxents. On the other hand, it doesn't
3030 init_psymbol_list (objfile
, num_symbols
);
3032 free_pending_blocks ();
3034 scoped_free_pendings free_pending
;
3035 minimal_symbol_reader
reader (objfile
);
3037 /* Now that the symbol table data of the executable file are all in core,
3038 process them and define symbols accordingly. */
3040 scan_xcoff_symtab (reader
, objfile
);
3042 /* Install any minimal symbols that have been collected as the current
3043 minimal symbols for this objfile. */
3047 /* DWARF2 sections. */
3049 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3050 dwarf2_build_psymtabs (objfile
);
3052 dwarf2_build_frame_info (objfile
);
3056 xcoff_symfile_offsets (struct objfile
*objfile
,
3057 const struct section_addr_info
*addrs
)
3059 const char *first_section_name
;
3061 default_symfile_offsets (objfile
, addrs
);
3063 /* Oneof the weird side-effects of default_symfile_offsets is that
3064 it sometimes sets some section indices to zero for sections that,
3065 in fact do not exist. See the body of default_symfile_offsets
3066 for more info on when that happens. Undo that, as this then allows
3067 us to test whether the associated section exists or not, and then
3068 access it quickly (without searching it again). */
3070 if (objfile
->num_sections
== 0)
3071 return; /* Is that even possible? Better safe than sorry. */
3074 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3076 if (objfile
->sect_index_text
== 0
3077 && strcmp (first_section_name
, ".text") != 0)
3078 objfile
->sect_index_text
= -1;
3080 if (objfile
->sect_index_data
== 0
3081 && strcmp (first_section_name
, ".data") != 0)
3082 objfile
->sect_index_data
= -1;
3084 if (objfile
->sect_index_bss
== 0
3085 && strcmp (first_section_name
, ".bss") != 0)
3086 objfile
->sect_index_bss
= -1;
3088 if (objfile
->sect_index_rodata
== 0
3089 && strcmp (first_section_name
, ".rodata") != 0)
3090 objfile
->sect_index_rodata
= -1;
3093 /* Register our ability to parse symbols for xcoff BFD files. */
3095 static const struct sym_fns xcoff_sym_fns
=
3098 /* It is possible that coff and xcoff should be merged as
3099 they do have fundamental similarities (for example, the extra storage
3100 classes used for stabs could presumably be recognized in any COFF file).
3101 However, in addition to obvious things like all the csect hair, there are
3102 some subtler differences between xcoffread.c and coffread.c, notably
3103 the fact that coffread.c has no need to read in all the symbols, but
3104 xcoffread.c reads all the symbols and does in fact randomly access them
3105 (in C_BSTAT and line number processing). */
3107 xcoff_new_init
, /* init anything gbl to entire symtab */
3108 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3109 xcoff_initial_scan
, /* read a symbol file into symtab */
3110 NULL
, /* sym_read_psymbols */
3111 xcoff_symfile_finish
, /* finished with file, cleanup */
3112 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3113 default_symfile_segments
, /* Get segment information from a file. */
3114 aix_process_linenos
,
3115 default_symfile_relocate
, /* Relocate a debug section. */
3116 NULL
, /* sym_probe_fns */
3120 /* Same as xcoff_get_n_import_files, but for core files. */
3123 xcoff_get_core_n_import_files (bfd
*abfd
)
3125 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3127 file_ptr offset
= 0;
3131 return -1; /* Not a core file. */
3133 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3139 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3141 next
= bfd_get_32 (abfd
, buf
);
3143 break; /* This is the last entry. */
3147 /* Return the number of entries, excluding the first one, which is
3148 the path to the executable that produced this core file. */
3149 return n_entries
- 1;
3152 /* Return the number of import files (shared libraries) that the given
3153 BFD depends on. Return -1 if this number could not be computed. */
3156 xcoff_get_n_import_files (bfd
*abfd
)
3158 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3162 /* If the ".loader" section does not exist, the objfile is probably
3163 not an executable. Might be a core file... */
3165 return xcoff_get_core_n_import_files (abfd
);
3167 /* The number of entries in the Import Files Table is stored in
3168 field l_nimpid. This field is always at offset 16, and is
3169 always 4 bytes long. Read those 4 bytes. */
3171 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3173 l_nimpid
= bfd_get_32 (abfd
, buf
);
3175 /* By convention, the first entry is the default LIBPATH value
3176 to be used by the system loader, so it does not count towards
3177 the number of import files. */
3178 return l_nimpid
- 1;
3181 /* Free the per-objfile xcoff data. */
3184 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3190 _initialize_xcoffread (void)
3192 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3194 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,