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 const 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 const 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
,
1049 record_debugformat (debugfmt
);
1050 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1052 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1053 first_object_file_end
= 0;
1055 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1057 while (symnum
< max_symnum
)
1059 QUIT
; /* make this command interruptable. */
1061 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1062 /* read one symbol into `cs' structure. After processing the
1063 whole symbol table, only string table will be kept in memory,
1064 symbol table and debug section of xcoff will be freed. Thus
1065 we can mark symbols with names in string table as
1070 /* Swap and align the symbol into a reasonable C structure. */
1071 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1073 cs
->c_symnum
= symnum
;
1074 cs
->c_naux
= symbol
->n_numaux
;
1075 if (symbol
->n_zeroes
)
1077 symname_alloced
= 0;
1078 /* We must use the original, unswapped, name here so the name field
1079 pointed to by cs->c_name will persist throughout xcoffread. If
1080 we use the new field, it gets overwritten for each symbol. */
1081 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1082 /* If it's exactly E_SYMNMLEN characters long it isn't
1084 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1088 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1090 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1091 p
[E_SYMNMLEN
] = '\0';
1093 symname_alloced
= 1;
1096 else if (symbol
->n_sclass
& 0x80)
1098 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1099 symname_alloced
= 0;
1103 /* in string table */
1104 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1105 symname_alloced
= 1;
1107 cs
->c_value
= symbol
->n_value
;
1108 cs
->c_sclass
= symbol
->n_sclass
;
1109 cs
->c_secnum
= symbol
->n_scnum
;
1110 cs
->c_type
= (unsigned) symbol
->n_type
;
1112 raw_symbol
+= local_symesz
;
1115 /* Save addr of first aux entry. */
1116 raw_auxptr
= raw_symbol
;
1118 /* Skip all the auxents associated with this symbol. */
1119 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1121 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1126 /* if symbol name starts with ".$" or "$", ignore it. */
1127 if (cs
->c_name
[0] == '$'
1128 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1131 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1133 if (get_last_source_file ())
1135 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1136 SECT_OFF_TEXT (objfile
));
1141 start_symtab (objfile
, "_globals_", (char *) NULL
, (CORE_ADDR
) 0,
1143 record_debugformat (debugfmt
);
1144 cur_src_end_addr
= first_object_file_end
;
1145 /* Done with all files, everything from here on is globals. */
1148 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1149 cs
->c_sclass
== C_WEAKEXT
)
1151 /* Dealing with a symbol with a csect entry. */
1153 #define CSECT(PP) ((PP)->x_csect)
1154 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1155 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1156 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1157 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1159 /* Convert the auxent to something we can access.
1160 XCOFF can have more than one auxiliary entries.
1162 Actual functions will have two auxiliary entries, one to have the
1163 function size and other to have the smtype/smclass (LD/PR).
1165 c_type value of main symbol table will be set only in case of
1166 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1167 Bit 10 of type is set if symbol is a function, ie the value is set
1168 to 32(0x20). So we need to read the first function auxiliay entry
1169 which contains the size. */
1170 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1172 /* a function entry point. */
1174 fcn_start_addr
= cs
->c_value
;
1176 /* save the function header info, which will be used
1177 when `.bf' is seen. */
1180 /* Convert the auxent to something we can access. */
1181 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1182 0, cs
->c_naux
, &fcn_aux_saved
);
1185 /* Read the csect auxiliary header, which is always the last by
1187 bfd_coff_swap_aux_in (abfd
,
1189 + ((coff_data (abfd
)->local_symesz
)
1190 * (cs
->c_naux
- 1)),
1191 cs
->c_type
, cs
->c_sclass
,
1192 cs
->c_naux
- 1, cs
->c_naux
,
1195 switch (CSECT_SMTYP (&main_aux
))
1199 /* Ignore all external references. */
1203 /* A section description. */
1205 switch (CSECT_SCLAS (&main_aux
))
1211 /* A program csect is seen. We have to allocate one
1212 symbol table for each program csect. Normally gdb
1213 prefers one symtab for each source file. In case
1214 of AIX, one source file might include more than one
1215 [PR] csect, and they don't have to be adjacent in
1216 terms of the space they occupy in memory. Thus, one
1217 single source file might get fragmented in the
1218 memory and gdb's file start and end address
1219 approach does not work! GCC (and I think xlc) seem
1220 to put all the code in the unnamed program csect. */
1222 if (last_csect_name
)
1224 complete_symtab (filestring
, file_start_addr
);
1225 cur_src_end_addr
= file_end_addr
;
1226 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1229 /* Give all csects for this source file the same
1231 start_symtab (objfile
, filestring
, NULL
,
1232 (CORE_ADDR
) 0, language_unknown
);
1233 record_debugformat (debugfmt
);
1236 /* If this is the very first csect seen,
1237 basically `__start'. */
1240 first_object_file_end
1241 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1246 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1247 SECT_OFF_TEXT (objfile
));
1248 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1250 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1251 last_csect_name
= cs
->c_name
;
1255 /* All other symbols are put into the minimal symbol
1268 /* Ignore the symbol. */
1276 switch (CSECT_SCLAS (&main_aux
))
1278 /* We never really come to this part as this case has been
1279 handled in ISFCN check above.
1280 This and other cases of XTY_LD are kept just for
1286 /* shared library function trampoline code entry point. */
1290 /* The symbols often have the same names as debug symbols for
1291 functions, and confuse lookup_symbol. */
1295 /* xlc puts each variable in a separate csect, so we get
1296 an XTY_SD for each variable. But gcc puts several
1297 variables in a csect, so that each variable only gets
1298 an XTY_LD. This will typically be XMC_RW; I suspect
1299 XMC_RO and XMC_BS might be possible too.
1300 These variables are put in the minimal symbol table
1307 /* Common symbols are put into the minimal symbol table only. */
1315 switch (cs
->c_sclass
)
1319 /* c_value field contains symnum of next .file entry in table
1320 or symnum of first global after last .file. */
1322 next_file_symnum
= cs
->c_value
;
1324 /* Complete symbol table for last object file containing
1325 debugging information. */
1327 /* Whether or not there was a csect in the previous file, we
1328 have to call `end_stabs' and `start_stabs' to reset
1329 type_vector, line_vector, etc. structures. */
1331 complete_symtab (filestring
, file_start_addr
);
1332 cur_src_end_addr
= file_end_addr
;
1333 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1336 /* XCOFF, according to the AIX 3.2 documentation, puts the
1337 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1338 do things the standard COFF way and put it in the auxent.
1339 We use the auxent if the symbol is ".file" and an auxent
1340 exists, otherwise use the symbol itself. Simple
1342 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1344 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1345 0, cs
->c_naux
, &main_aux
);
1346 filestring
= coff_getfilename (&main_aux
, objfile
);
1349 filestring
= cs
->c_name
;
1352 start_symtab (objfile
, filestring
, (char *) NULL
, (CORE_ADDR
) 0,
1354 record_debugformat (debugfmt
);
1355 last_csect_name
= 0;
1357 /* reset file start and end addresses. A compilation unit
1358 with no text (only data) should have zero file
1360 file_start_addr
= file_end_addr
= 0;
1364 fcn_stab_saved
= *cs
;
1368 if (strcmp (cs
->c_name
, ".bf") == 0)
1370 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1371 SECT_OFF_TEXT (objfile
));
1373 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1374 0, cs
->c_naux
, &main_aux
);
1376 within_function
= 1;
1378 newobj
= push_context (0, fcn_start_addr
+ off
);
1380 newobj
->name
= define_symbol
1381 (fcn_cs_saved
.c_value
+ off
,
1382 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1383 if (newobj
->name
!= NULL
)
1384 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1386 else if (strcmp (cs
->c_name
, ".ef") == 0)
1388 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1389 0, cs
->c_naux
, &main_aux
);
1391 /* The value of .ef is the address of epilogue code;
1392 not useful for gdb. */
1393 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1394 contains number of lines to '}' */
1396 if (context_stack_depth
<= 0)
1397 { /* We attempted to pop an empty context stack. */
1398 ef_complaint (cs
->c_symnum
);
1399 within_function
= 0;
1402 newobj
= pop_context ();
1403 /* Stack must be empty now. */
1404 if (context_stack_depth
> 0 || newobj
== NULL
)
1406 ef_complaint (cs
->c_symnum
);
1407 within_function
= 0;
1411 finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
1412 NULL
, newobj
->start_addr
,
1413 (fcn_cs_saved
.c_value
1414 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1415 + ANOFFSET (objfile
->section_offsets
,
1416 SECT_OFF_TEXT (objfile
))));
1417 within_function
= 0;
1422 /* Begin static block. */
1424 struct internal_syment symbol
;
1426 read_symbol (&symbol
, cs
->c_value
);
1427 static_block_base
= symbol
.n_value
;
1428 static_block_section
=
1429 secnum_to_section (symbol
.n_scnum
, objfile
);
1434 /* End of static block. */
1435 static_block_base
= 0;
1436 static_block_section
= -1;
1447 complaint (&symfile_complaints
,
1448 _("Unrecognized storage class %d."),
1463 /* beginning of include file */
1464 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1465 order. Thus, when wee see them, we might not know enough info
1466 to process them. Thus, we'll be saving them into a table
1467 (inclTable) and postpone their processing. */
1469 record_include_begin (cs
);
1473 /* End of include file. */
1474 /* See the comment after case C_BINCL. */
1475 record_include_end (cs
);
1479 if (strcmp (cs
->c_name
, ".bb") == 0)
1482 newobj
= push_context (depth
,
1484 + ANOFFSET (objfile
->section_offsets
,
1485 SECT_OFF_TEXT (objfile
))));
1487 else if (strcmp (cs
->c_name
, ".eb") == 0)
1489 if (context_stack_depth
<= 0)
1490 { /* We attempted to pop an empty context stack. */
1491 eb_complaint (cs
->c_symnum
);
1494 newobj
= pop_context ();
1495 if (depth
-- != newobj
->depth
)
1497 eb_complaint (cs
->c_symnum
);
1500 if (local_symbols
&& context_stack_depth
> 0)
1502 /* Make a block for the local symbols within. */
1503 finish_block (newobj
->name
, &local_symbols
,
1504 newobj
->old_blocks
, NULL
,
1507 + ANOFFSET (objfile
->section_offsets
,
1508 SECT_OFF_TEXT (objfile
))));
1510 local_symbols
= newobj
->locals
;
1515 process_xcoff_symbol (cs
, objfile
);
1520 if (get_last_source_file ())
1522 struct compunit_symtab
*cust
;
1524 complete_symtab (filestring
, file_start_addr
);
1525 cur_src_end_addr
= file_end_addr
;
1526 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1527 /* When reading symbols for the last C_FILE of the objfile, try
1528 to make sure that we set pst->compunit_symtab to the symtab for the
1529 file, not to the _globals_ symtab. I'm not sure whether this
1530 actually works right or when/if it comes up. */
1531 if (pst
->compunit_symtab
== NULL
)
1532 pst
->compunit_symtab
= cust
;
1537 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1538 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1539 *(SYMBOL2) = *(SYMBOL1);
1542 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1543 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1544 (NAME), strlen (NAME)))
1547 /* process one xcoff symbol. */
1549 static struct symbol
*
1550 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1552 struct symbol onesymbol
;
1553 struct symbol
*sym
= &onesymbol
;
1554 struct symbol
*sym2
= NULL
;
1560 if (cs
->c_secnum
< 0)
1562 /* The value is a register number, offset within a frame, etc.,
1563 and does not get relocated. */
1569 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1570 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1577 initialize_objfile_symbol (sym
);
1579 /* default assumptions */
1580 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1581 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1582 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1584 if (ISFCN (cs
->c_type
))
1586 /* At this point, we don't know the type of the function. This
1587 will be patched with the type from its stab entry later on in
1588 patch_block_stabs (), unless the file was compiled without -g. */
1590 SYMBOL_SET_LINKAGE_NAME (sym
, ((const char *)
1591 SYMNAME_ALLOC (name
, symname_alloced
)));
1592 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1594 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1595 SYMBOL_DUP (sym
, sym2
);
1597 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1598 add_symbol_to_list (sym2
, &global_symbols
);
1599 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1600 add_symbol_to_list (sym2
, &file_symbols
);
1604 /* In case we can't figure out the type, provide default. */
1605 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1607 switch (cs
->c_sclass
)
1610 /* The values of functions and global symbols are now resolved
1611 via the global_sym_chain in stabsread.c. */
1613 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1614 add_stab_to_list (name
, &global_stabs
);
1616 add_stab_to_list (name
, &file_stabs
);
1620 add_stab_to_list (name
, &global_stabs
);
1625 common_block_start (cs
->c_name
, objfile
);
1629 common_block_end (objfile
);
1633 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1646 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1649 SYMBOL_SECTION (sym
) = sec
;
1656 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1657 all statics and we need to distinguish file-scope versus
1658 function-scope using within_function. We do this by
1659 changing the string we pass to define_symbol to use 'S'
1660 where we need to, which is not necessarily super-clean,
1661 but seems workable enough. */
1666 pp
= strchr (name
, ':');
1671 if (*pp
== 'V' && !within_function
)
1673 sym
= define_symbol ((cs
->c_value
1674 + ANOFFSET (objfile
->section_offsets
,
1675 static_block_section
)),
1676 cs
->c_name
, 0, 0, objfile
);
1679 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1680 SYMBOL_SECTION (sym
) = static_block_section
;
1689 /* Extract the file name from the aux entry of a C_FILE symbol.
1690 Result is in static storage and is only good for temporary use. */
1693 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1695 static char buffer
[BUFSIZ
];
1697 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1698 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1699 + aux_entry
->x_file
.x_n
.x_offset
));
1702 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1703 buffer
[FILNMLEN
] = '\0';
1708 /* Set *SYMBOL to symbol number symno in symtbl. */
1710 read_symbol (struct internal_syment
*symbol
, int symno
)
1712 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1713 int nsyms
= xcoff
->symtbl_num_syms
;
1714 char *stbl
= xcoff
->symtbl
;
1716 if (symno
< 0 || symno
>= nsyms
)
1718 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1719 symbol
->n_value
= 0;
1720 symbol
->n_scnum
= -1;
1723 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1724 stbl
+ (symno
* local_symesz
),
1728 /* Get value corresponding to symbol number symno in symtbl. */
1731 read_symbol_nvalue (int symno
)
1733 struct internal_syment symbol
[1];
1735 read_symbol (symbol
, symno
);
1736 return symbol
->n_value
;
1740 /* Find the address of the function corresponding to symno, where
1741 symno is the symbol pointed to by the linetable. */
1744 read_symbol_lineno (int symno
)
1746 struct objfile
*objfile
= this_symtab_objfile
;
1747 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1749 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1750 int nsyms
= info
->symtbl_num_syms
;
1751 char *stbl
= info
->symtbl
;
1752 char *strtbl
= info
->strtbl
;
1754 struct internal_syment symbol
[1];
1755 union internal_auxent main_aux
[1];
1759 bf_notfound_complaint ();
1763 /* Note that just searching for a short distance (e.g. 50 symbols)
1764 is not enough, at least in the following case.
1767 [many .stabx entries]
1768 [a few functions, referring to foo]
1772 What happens here is that the assembler moves the .stabx entries
1773 to right before the ".bf" for foo, but the symbol for "foo" is before
1774 all the stabx entries. See PR gdb/2222. */
1776 /* Maintaining a table of .bf entries might be preferable to this search.
1777 If I understand things correctly it would need to be done only for
1778 the duration of a single psymtab to symtab conversion. */
1779 while (symno
< nsyms
)
1781 bfd_coff_swap_sym_in (symfile_bfd
,
1782 stbl
+ (symno
* local_symesz
), symbol
);
1783 if (symbol
->n_sclass
== C_FCN
)
1785 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1787 if (strcmp (name
, ".bf") == 0)
1790 symno
+= symbol
->n_numaux
+ 1;
1793 bf_notfound_complaint ();
1797 /* Take aux entry and return its lineno. */
1799 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1800 symbol
->n_type
, symbol
->n_sclass
,
1801 0, symbol
->n_numaux
, main_aux
);
1803 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1806 /* Support for line number handling. */
1808 /* This function is called for every section; it finds the outer limits
1809 * of the line table (minimum and maximum file offset) so that the
1810 * mainline code can read the whole thing for efficiency.
1813 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1815 struct coff_symfile_info
*info
;
1817 file_ptr offset
, maxoff
;
1819 count
= asect
->lineno_count
;
1821 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1824 size
= count
* coff_data (abfd
)->local_linesz
;
1825 info
= (struct coff_symfile_info
*) vpinfo
;
1826 offset
= asect
->line_filepos
;
1827 maxoff
= offset
+ size
;
1829 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1830 info
->min_lineno_offset
= offset
;
1832 if (maxoff
> info
->max_lineno_offset
)
1833 info
->max_lineno_offset
= maxoff
;
1837 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1847 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1852 /* Read in all partial symtabs on which this one is dependent. */
1853 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1854 if (!pst
->dependencies
[i
]->readin
)
1856 /* Inform about additional files that need to be read in. */
1859 fputs_filtered (" ", gdb_stdout
);
1861 fputs_filtered ("and ", gdb_stdout
);
1863 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1864 wrap_here (""); /* Flush output */
1865 gdb_flush (gdb_stdout
);
1867 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1870 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1872 /* Init stuff necessary for reading in symbols. */
1876 scoped_free_pendings free_pending
;
1877 read_xcoff_symtab (objfile
, pst
);
1883 /* Read in all of the symbols for a given psymtab for real.
1884 Be verbose about it if the user wants that. SELF is not NULL. */
1887 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1892 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1897 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1898 || self
->number_of_dependencies
)
1900 /* Print the message now, before reading the string table,
1901 to avoid disconcerting pauses. */
1904 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1905 gdb_flush (gdb_stdout
);
1908 next_symbol_text_func
= xcoff_next_symbol_text
;
1910 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1912 /* Match with global symbols. This only needs to be done once,
1913 after all of the symtabs and dependencies have been read in. */
1914 scan_file_globals (objfile
);
1916 /* Finish up the debug error message. */
1918 printf_filtered ("done.\n");
1923 xcoff_new_init (struct objfile
*objfile
)
1925 stabsread_new_init ();
1926 buildsym_new_init ();
1929 /* Do initialization in preparation for reading symbols from OBJFILE.
1931 We will only be called if this is an XCOFF or XCOFF-like file.
1932 BFD handles figuring out the format of the file, and code in symfile.c
1933 uses BFD's determination to vector to us. */
1936 xcoff_symfile_init (struct objfile
*objfile
)
1938 struct coff_symfile_info
*xcoff
;
1940 /* Allocate struct to keep track of the symfile. */
1941 xcoff
= XNEW (struct coff_symfile_info
);
1942 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1944 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1945 find this causes a significant slowdown in gdb then we could
1946 set it in the debug symbol readers only when necessary. */
1947 objfile
->flags
|= OBJF_REORDERED
;
1950 /* Perform any local cleanups required when we are done with a particular
1951 objfile. I.E, we are in the process of discarding all symbol information
1952 for an objfile, freeing up all memory held for it, and unlinking the
1953 objfile struct from the global list of known objfiles. */
1956 xcoff_symfile_finish (struct objfile
*objfile
)
1958 /* Start with a fresh include table for the next objfile. */
1964 inclIndx
= inclLength
= inclDepth
= 0;
1966 dwarf2_free_objfile (objfile
);
1971 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1975 unsigned char lengthbuf
[4];
1977 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1979 xcoff
->strtbl
= NULL
;
1981 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1982 error (_("cannot seek to string table in %s: %s"),
1983 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1985 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1986 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1988 /* If no string table is needed, then the file may end immediately
1989 after the symbols. Just return with `strtbl' set to NULL. */
1991 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1994 /* Allocate string table from objfile_obstack. We will need this table
1995 as long as we have its symbol table around. */
1997 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1998 xcoff
->strtbl
= strtbl
;
2000 /* Copy length buffer, the first byte is usually zero and is
2001 used for stabs with a name length of zero. */
2002 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
2003 if (length
== sizeof lengthbuf
)
2006 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
2008 if (val
!= length
- sizeof lengthbuf
)
2009 error (_("cannot read string table from %s: %s"),
2010 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
2011 if (strtbl
[length
- 1] != '\0')
2012 error (_("bad symbol file: string table "
2013 "does not end with null character"));
2018 /* If we have not yet seen a function for this psymtab, this is 0. If we
2019 have seen one, it is the offset in the line numbers of the line numbers
2021 static unsigned int first_fun_line_offset
;
2023 /* Allocate and partially fill a partial symtab. It will be
2024 completely filled at the end of the symbol list.
2026 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2027 is the address relative to which its symbols are (incremental) or 0
2030 static struct partial_symtab
*
2031 xcoff_start_psymtab (struct objfile
*objfile
,
2032 const char *filename
, int first_symnum
,
2033 std::vector
<partial_symbol
*> &global_psymbols
,
2034 std::vector
<partial_symbol
*> &static_psymbols
)
2036 struct partial_symtab
*result
=
2037 start_psymtab_common (objfile
,
2039 /* We fill in textlow later. */
2041 global_psymbols
, static_psymbols
);
2043 result
->read_symtab_private
=
2044 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2045 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2046 result
->read_symtab
= xcoff_read_symtab
;
2048 /* Deduce the source language from the filename for this psymtab. */
2049 psymtab_language
= deduce_language_from_filename (filename
);
2054 /* Close off the current usage of PST.
2055 Returns PST, or NULL if the partial symtab was empty and thrown away.
2057 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2059 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2060 are the information for includes and dependencies. */
2062 static struct partial_symtab
*
2063 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2064 const char **include_list
, int num_includes
,
2065 int capping_symbol_number
,
2066 struct partial_symtab
**dependency_list
,
2067 int number_dependencies
, int textlow_not_set
)
2071 if (capping_symbol_number
!= -1)
2072 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2073 capping_symbol_number
2074 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2075 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2076 first_fun_line_offset
;
2077 first_fun_line_offset
= 0;
2079 end_psymtab_common (objfile
, pst
);
2081 pst
->number_of_dependencies
= number_dependencies
;
2082 if (number_dependencies
)
2084 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2085 struct partial_symtab
*,
2086 number_dependencies
);
2087 memcpy (pst
->dependencies
, dependency_list
,
2088 number_dependencies
* sizeof (struct partial_symtab
*));
2091 pst
->dependencies
= 0;
2093 for (i
= 0; i
< num_includes
; i
++)
2095 struct partial_symtab
*subpst
=
2096 allocate_psymtab (include_list
[i
], objfile
);
2098 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2099 sizeof (struct symloc
));
2100 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2101 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2102 subpst
->textlow
= 0;
2103 subpst
->texthigh
= 0;
2105 /* We could save slight bits of space by only making one of these,
2106 shared by the entire set of include files. FIXME-someday. */
2107 subpst
->dependencies
=
2108 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2109 subpst
->dependencies
[0] = pst
;
2110 subpst
->number_of_dependencies
= 1;
2112 subpst
->globals_offset
=
2113 subpst
->n_global_syms
=
2114 subpst
->statics_offset
=
2115 subpst
->n_static_syms
= 0;
2118 subpst
->compunit_symtab
= NULL
;
2119 subpst
->read_symtab
= pst
->read_symtab
;
2122 if (num_includes
== 0
2123 && number_dependencies
== 0
2124 && pst
->n_global_syms
== 0
2125 && pst
->n_static_syms
== 0)
2127 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2128 it is on the obstack, but we can forget to chain it on the list. */
2129 /* Empty psymtabs happen as a result of header files which don't have
2130 any symbols in them. There can be a lot of them. */
2132 discard_psymtab (objfile
, pst
);
2134 /* Indicate that psymtab was thrown away. */
2140 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2141 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2142 the symbol and its auxents. */
2145 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2146 const char **name
, char **raw
, unsigned int *symnump
,
2147 struct objfile
*objfile
)
2149 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2150 if (symbol
->n_zeroes
)
2152 /* If it's exactly E_SYMNMLEN characters long it isn't
2154 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2156 /* FIXME: wastes memory for symbols which we don't end up putting
2157 into the minimal symbols. */
2160 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2162 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2163 p
[E_SYMNMLEN
] = '\0';
2167 /* Point to the unswapped name as that persists as long as the
2169 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2171 else if (symbol
->n_sclass
& 0x80)
2173 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2177 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2180 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2181 if (symbol
->n_numaux
> 0)
2183 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2184 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2186 *symnump
+= symbol
->n_numaux
;
2187 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2192 function_outside_compilation_unit_complaint (const char *arg1
)
2194 complaint (&symfile_complaints
,
2195 _("function `%s' appears to be defined "
2196 "outside of all compilation units"),
2201 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2202 struct objfile
*objfile
)
2204 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2205 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2206 const char *filestring
= NULL
;
2208 const char *namestring
;
2213 /* Current partial symtab */
2214 struct partial_symtab
*pst
;
2216 /* List of current psymtab's include files. */
2217 const char **psymtab_include_list
;
2218 int includes_allocated
;
2221 /* Index within current psymtab dependency list. */
2222 struct partial_symtab
**dependency_list
;
2223 int dependencies_used
, dependencies_allocated
;
2226 struct internal_syment symbol
;
2227 union internal_auxent main_aux
[5];
2228 unsigned int ssymnum
;
2230 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2231 CORE_ADDR last_csect_val
= 0;
2232 int last_csect_sec
= 0;
2233 int misc_func_recorded
= 0; /* true if any misc. function. */
2234 int textlow_not_set
= 1;
2236 pst
= (struct partial_symtab
*) 0;
2238 includes_allocated
= 30;
2240 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2241 sizeof (const char *));
2243 dependencies_allocated
= 30;
2244 dependencies_used
= 0;
2246 (struct partial_symtab
**) alloca (dependencies_allocated
*
2247 sizeof (struct partial_symtab
*));
2249 set_last_source_file (NULL
);
2251 abfd
= objfile
->obfd
;
2252 next_symbol_text_func
= xcoff_next_symbol_text
;
2254 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2255 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2257 while (ssymnum
< nsyms
)
2263 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2264 sclass
= symbol
.n_sclass
;
2272 /* The CSECT auxent--always the last auxent. */
2273 union internal_auxent csect_aux
;
2274 unsigned int symnum_before
= ssymnum
;
2276 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2278 if (symbol
.n_numaux
> 1)
2280 bfd_coff_swap_aux_in
2282 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2285 symbol
.n_numaux
- 1,
2290 csect_aux
= main_aux
[0];
2292 /* If symbol name starts with ".$" or "$", ignore it. */
2293 if (namestring
[0] == '$'
2294 || (namestring
[0] == '.' && namestring
[1] == '$'))
2297 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2300 switch (csect_aux
.x_csect
.x_smclas
)
2303 if (last_csect_name
)
2305 /* If no misc. function recorded in the last
2306 seen csect, enter it as a function. This
2307 will take care of functions like strcmp()
2310 if (!misc_func_recorded
)
2312 record_minimal_symbol
2313 (reader
, last_csect_name
, last_csect_val
,
2314 mst_text
, last_csect_sec
, objfile
);
2315 misc_func_recorded
= 1;
2320 /* We have to allocate one psymtab for
2321 each program csect, because their text
2322 sections need not be adjacent. */
2324 (objfile
, pst
, psymtab_include_list
,
2325 includes_used
, symnum_before
, dependency_list
,
2326 dependencies_used
, textlow_not_set
);
2328 dependencies_used
= 0;
2329 /* Give all psymtabs for this source file the same
2331 pst
= xcoff_start_psymtab
2335 objfile
->global_psymbols
,
2336 objfile
->static_psymbols
);
2339 /* Activate the misc_func_recorded mechanism for
2340 compiler- and linker-generated CSECTs like ".strcmp"
2342 if (namestring
&& (namestring
[0] == '.'
2343 || namestring
[0] == '@'))
2345 last_csect_name
= namestring
;
2346 last_csect_val
= symbol
.n_value
;
2347 last_csect_sec
= symbol
.n_scnum
;
2352 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2354 if (highval
> pst
->texthigh
)
2355 pst
->texthigh
= highval
;
2356 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2357 pst
->textlow
= symbol
.n_value
;
2359 misc_func_recorded
= 0;
2364 /* Data variables are recorded in the minimal symbol
2365 table, except for section symbols. */
2366 if (*namestring
!= '.')
2367 record_minimal_symbol
2368 (reader
, namestring
, symbol
.n_value
,
2369 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2370 symbol
.n_scnum
, objfile
);
2375 warning (_("More than one XMC_TC0 symbol found."));
2376 toc_offset
= symbol
.n_value
;
2378 /* Make TOC offset relative to start address of
2380 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2382 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2386 /* These symbols tell us where the TOC entry for a
2387 variable is, not the variable itself. */
2396 switch (csect_aux
.x_csect
.x_smclas
)
2399 /* A function entry point. */
2401 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2402 first_fun_line_offset
=
2403 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2405 record_minimal_symbol
2406 (reader
, namestring
, symbol
.n_value
,
2407 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2408 symbol
.n_scnum
, objfile
);
2409 misc_func_recorded
= 1;
2413 /* shared library function trampoline code entry
2416 /* record trampoline code entries as
2417 mst_solib_trampoline symbol. When we lookup mst
2418 symbols, we will choose mst_text over
2419 mst_solib_trampoline. */
2420 record_minimal_symbol
2421 (reader
, namestring
, symbol
.n_value
,
2422 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2423 misc_func_recorded
= 1;
2427 /* The symbols often have the same names as
2428 debug symbols for functions, and confuse
2434 /* xlc puts each variable in a separate csect,
2435 so we get an XTY_SD for each variable. But
2436 gcc puts several variables in a csect, so
2437 that each variable only gets an XTY_LD. We
2438 still need to record them. This will
2439 typically be XMC_RW; I suspect XMC_RO and
2440 XMC_BS might be possible too. */
2441 if (*namestring
!= '.')
2442 record_minimal_symbol
2443 (reader
, namestring
, symbol
.n_value
,
2444 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2445 symbol
.n_scnum
, objfile
);
2451 switch (csect_aux
.x_csect
.x_smclas
)
2455 /* Common variables are recorded in the minimal symbol
2456 table, except for section symbols. */
2457 if (*namestring
!= '.')
2458 record_minimal_symbol
2459 (reader
, namestring
, symbol
.n_value
,
2460 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2461 symbol
.n_scnum
, objfile
);
2473 unsigned int symnum_before
;
2475 symnum_before
= ssymnum
;
2476 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2479 /* See if the last csect needs to be recorded. */
2481 if (last_csect_name
&& !misc_func_recorded
)
2483 /* If no misc. function recorded in the last seen csect, enter
2484 it as a function. This will take care of functions like
2485 strcmp() compiled by xlc. */
2487 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2488 mst_text
, last_csect_sec
, objfile
);
2489 misc_func_recorded
= 1;
2494 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2495 includes_used
, symnum_before
,
2496 dependency_list
, dependencies_used
,
2499 dependencies_used
= 0;
2501 first_fun_line_offset
= 0;
2503 /* XCOFF, according to the AIX 3.2 documentation, puts the
2504 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2505 do things the standard COFF way and put it in the auxent.
2506 We use the auxent if the symbol is ".file" and an auxent
2507 exists, otherwise use the symbol itself. */
2508 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2510 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2513 filestring
= namestring
;
2515 pst
= xcoff_start_psymtab (objfile
,
2518 objfile
->global_psymbols
,
2519 objfile
->static_psymbols
);
2520 last_csect_name
= NULL
;
2526 complaint (&symfile_complaints
,
2527 _("Storage class %d not recognized during scan"),
2532 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2533 to handle only the C_FUN and C_EXT. */
2548 /* C_EINCL means we are switching back to the main file. But there
2549 is no reason to care; the only thing we want to know about
2550 includes is the names of all the included (.h) files. */
2555 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2559 /* I don't think the name of the common block (as opposed to the
2560 variables within it) is something which is user visible
2568 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2569 so C_LSYM would appear to be only for locals. */
2575 /* We probably could save a few instructions by assuming that
2576 C_LSYM, C_PSYM, etc., never have auxents. */
2577 int naux1
= symbol
.n_numaux
+ 1;
2580 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2586 /* Mark down an include file in the current psymtab. */
2587 enum language tmp_language
;
2589 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2592 tmp_language
= deduce_language_from_filename (namestring
);
2594 /* Only change the psymtab's language if we've learned
2595 something useful (eg. tmp_language is not language_unknown).
2596 In addition, to match what start_subfile does, never change
2598 if (tmp_language
!= language_unknown
2599 && (tmp_language
!= language_c
2600 || psymtab_language
!= language_cplus
))
2601 psymtab_language
= tmp_language
;
2603 /* In C++, one may expect the same filename to come round many
2604 times, when code is coming alternately from the main file
2605 and from inline functions in other files. So I check to see
2606 if this is a file we've seen before -- either the main
2607 source file, or a previously included file.
2609 This seems to be a lot of time to be spending on N_SOL, but
2610 things like "break c-exp.y:435" need to work (I
2611 suppose the psymtab_include_list could be hashed or put
2612 in a binary tree, if profiling shows this is a major hog). */
2613 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2619 for (i
= 0; i
< includes_used
; i
++)
2620 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2628 psymtab_include_list
[includes_used
++] = namestring
;
2629 if (includes_used
>= includes_allocated
)
2631 const char **orig
= psymtab_include_list
;
2633 psymtab_include_list
= (const char **)
2634 alloca ((includes_allocated
*= 2) *
2635 sizeof (const char *));
2636 memcpy (psymtab_include_list
, orig
,
2637 includes_used
* sizeof (const char *));
2642 /* The value of the C_FUN is not the address of the function (it
2643 appears to be the address before linking), but as long as it
2644 is smaller than the actual address, then find_pc_partial_function
2645 will use the minimal symbols instead. I hope. */
2654 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2657 p
= strchr (namestring
, ':');
2659 continue; /* Not a debugging symbol. */
2661 /* Main processing section for debugging symbols which
2662 the initial read through the symbol tables needs to worry
2663 about. If we reach this point, the symbol which we are
2664 considering is definitely one we are interested in.
2665 p must also contain the (valid) index into the namestring
2666 which indicates the debugging type symbol. */
2671 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2672 SECT_OFF_DATA (objfile
));
2674 if (gdbarch_static_transform_name_p (gdbarch
))
2675 namestring
= gdbarch_static_transform_name
2676 (gdbarch
, namestring
);
2678 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2679 VAR_DOMAIN
, LOC_STATIC
,
2680 &objfile
->static_psymbols
,
2682 psymtab_language
, objfile
);
2686 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2687 SECT_OFF_DATA (objfile
));
2688 /* The addresses in these entries are reported to be
2689 wrong. See the code that reads 'G's for symtabs. */
2690 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2691 VAR_DOMAIN
, LOC_STATIC
,
2692 &objfile
->global_psymbols
,
2694 psymtab_language
, objfile
);
2698 /* When a 'T' entry is defining an anonymous enum, it
2699 may have a name which is the empty string, or a
2700 single space. Since they're not really defining a
2701 symbol, those shouldn't go in the partial symbol
2702 table. We do pick up the elements of such enums at
2703 'check_enum:', below. */
2704 if (p
>= namestring
+ 2
2705 || (p
== namestring
+ 1
2706 && namestring
[0] != ' '))
2708 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2709 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2710 &objfile
->static_psymbols
,
2711 0, psymtab_language
, objfile
);
2714 /* Also a typedef with the same name. */
2715 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2716 VAR_DOMAIN
, LOC_TYPEDEF
,
2717 &objfile
->static_psymbols
,
2718 0, psymtab_language
, objfile
);
2725 if (p
!= namestring
) /* a name is there, not just :T... */
2727 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2728 VAR_DOMAIN
, LOC_TYPEDEF
,
2729 &objfile
->static_psymbols
,
2730 0, psymtab_language
, objfile
);
2733 /* If this is an enumerated type, we need to
2734 add all the enum constants to the partial symbol
2735 table. This does not cover enums without names, e.g.
2736 "enum {a, b} c;" in C, but fortunately those are
2737 rare. There is no way for GDB to find those from the
2738 enum type without spending too much time on it. Thus
2739 to solve this problem, the compiler needs to put out the
2740 enum in a nameless type. GCC2 does this. */
2742 /* We are looking for something of the form
2743 <name> ":" ("t" | "T") [<number> "="] "e"
2744 {<constant> ":" <value> ","} ";". */
2746 /* Skip over the colon and the 't' or 'T'. */
2748 /* This type may be given a number. Also, numbers can come
2749 in pairs like (0,26). Skip over it. */
2750 while ((*p
>= '0' && *p
<= '9')
2751 || *p
== '(' || *p
== ',' || *p
== ')'
2757 /* The aix4 compiler emits extra crud before the
2761 /* Skip over the type (?). */
2765 /* Skip over the colon. */
2769 /* We have found an enumerated type. */
2770 /* According to comments in read_enum_type
2771 a comma could end it instead of a semicolon.
2772 I don't know where that happens.
2774 while (*p
&& *p
!= ';' && *p
!= ',')
2778 /* Check for and handle cretinous dbx symbol name
2780 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2781 p
= next_symbol_text (objfile
);
2783 /* Point to the character after the name
2784 of the enum constant. */
2785 for (q
= p
; *q
&& *q
!= ':'; q
++)
2787 /* Note that the value doesn't matter for
2788 enum constants in psymtabs, just in symtabs. */
2789 add_psymbol_to_list (p
, q
- p
, 1,
2790 VAR_DOMAIN
, LOC_CONST
,
2791 &objfile
->static_psymbols
,
2792 0, psymtab_language
, objfile
);
2793 /* Point past the name. */
2795 /* Skip over the value. */
2796 while (*p
&& *p
!= ',')
2798 /* Advance past the comma. */
2806 /* Constant, e.g. from "const" in Pascal. */
2807 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2808 VAR_DOMAIN
, LOC_CONST
,
2809 &objfile
->static_psymbols
,
2810 0, psymtab_language
, objfile
);
2816 int name_len
= p
- namestring
;
2817 char *name
= (char *) xmalloc (name_len
+ 1);
2819 memcpy (name
, namestring
, name_len
);
2820 name
[name_len
] = '\0';
2821 function_outside_compilation_unit_complaint (name
);
2824 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2825 SECT_OFF_TEXT (objfile
));
2826 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2827 VAR_DOMAIN
, LOC_BLOCK
,
2828 &objfile
->static_psymbols
,
2830 psymtab_language
, objfile
);
2833 /* Global functions were ignored here, but now they
2834 are put into the global psymtab like one would expect.
2835 They're also in the minimal symbol table. */
2839 int name_len
= p
- namestring
;
2840 char *name
= (char *) xmalloc (name_len
+ 1);
2842 memcpy (name
, namestring
, name_len
);
2843 name
[name_len
] = '\0';
2844 function_outside_compilation_unit_complaint (name
);
2848 /* We need only the minimal symbols for these
2849 loader-generated definitions. Keeping the global
2850 symbols leads to "in psymbols but not in symbols"
2852 if (startswith (namestring
, "@FIX"))
2855 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2856 SECT_OFF_TEXT (objfile
));
2857 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2858 VAR_DOMAIN
, LOC_BLOCK
,
2859 &objfile
->global_psymbols
,
2861 psymtab_language
, objfile
);
2864 /* Two things show up here (hopefully); static symbols of
2865 local scope (static used inside braces) or extensions
2866 of structure symbols. We can ignore both. */
2880 case '#': /* For symbol identification (used in
2885 /* It is a C++ nested symbol. We don't need to record it
2886 (I don't think); if we try to look up foo::bar::baz,
2887 then symbols for the symtab containing foo should get
2888 read in, I think. */
2889 /* Someone says sun cc puts out symbols like
2890 /foo/baz/maclib::/usr/local/bin/maclib,
2891 which would get here with a symbol type of ':'. */
2895 /* Unexpected symbol descriptor. The second and
2896 subsequent stabs of a continued stab can show up
2897 here. The question is whether they ever can mimic
2898 a normal stab--it would be nice if not, since we
2899 certainly don't want to spend the time searching to
2900 the end of every string looking for a
2903 complaint (&symfile_complaints
,
2904 _("unknown symbol descriptor `%c'"), p
[1]);
2906 /* Ignore it; perhaps it is an extension that we don't
2916 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2917 ssymnum
, dependency_list
,
2918 dependencies_used
, textlow_not_set
);
2921 /* Record the toc offset value of this symbol table into objfile
2922 structure. If no XMC_TC0 is found, toc_offset should be zero.
2923 Another place to obtain this information would be file auxiliary
2926 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2929 /* Return the toc offset value for a given objfile. */
2932 xcoff_get_toc_offset (struct objfile
*objfile
)
2935 return XCOFF_DATA (objfile
)->toc_offset
;
2939 /* Scan and build partial symbols for a symbol file.
2940 We have been initialized by a call to dbx_symfile_init, which
2941 put all the relevant info into a "struct dbx_symfile_info",
2942 hung off the objfile structure.
2944 SECTION_OFFSETS contains offsets relative to which the symbols in the
2945 various sections are (depending where the sections were actually
2949 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2953 int num_symbols
; /* # of symbols */
2954 file_ptr symtab_offset
; /* symbol table and */
2955 file_ptr stringtab_offset
; /* string table file offsets */
2956 struct coff_symfile_info
*info
;
2960 info
= XCOFF_DATA (objfile
);
2961 symfile_bfd
= abfd
= objfile
->obfd
;
2962 name
= objfile_name (objfile
);
2964 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2965 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2966 stringtab_offset
= symtab_offset
+
2967 num_symbols
* coff_data (abfd
)->local_symesz
;
2969 info
->min_lineno_offset
= 0;
2970 info
->max_lineno_offset
= 0;
2971 bfd_map_over_sections (abfd
, find_linenos
, info
);
2973 if (num_symbols
> 0)
2975 /* Read the string table. */
2976 init_stringtab (abfd
, stringtab_offset
, objfile
);
2978 /* Read the .debug section, if present. */
2980 struct bfd_section
*secp
;
2981 bfd_size_type length
;
2982 bfd_byte
*debugsec
= NULL
;
2984 secp
= bfd_get_section_by_name (abfd
, ".debug");
2987 length
= bfd_section_size (abfd
, secp
);
2991 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2994 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2996 error (_("Error reading .debug section of `%s': %s"),
2997 name
, bfd_errmsg (bfd_get_error ()));
3001 info
->debugsec
= (char *) debugsec
;
3005 /* Read the symbols. We keep them in core because we will want to
3006 access them randomly in read_symbol*. */
3007 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
3009 error (_("Error reading symbols from %s: %s"),
3010 name
, bfd_errmsg (bfd_get_error ()));
3011 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
3012 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
3013 info
->symtbl_num_syms
= num_symbols
;
3015 val
= bfd_bread (info
->symtbl
, size
, abfd
);
3017 perror_with_name (_("reading symbol table"));
3019 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3020 if (objfile
->global_psymbols
.capacity () == 0
3021 && objfile
->static_psymbols
.capacity () == 0)
3022 /* I'm not sure how how good num_symbols is; the rule of thumb in
3023 init_psymbol_list was developed for a.out. On the one hand,
3024 num_symbols includes auxents. On the other hand, it doesn't
3026 init_psymbol_list (objfile
, num_symbols
);
3028 free_pending_blocks ();
3030 scoped_free_pendings free_pending
;
3031 minimal_symbol_reader
reader (objfile
);
3033 /* Now that the symbol table data of the executable file are all in core,
3034 process them and define symbols accordingly. */
3036 scan_xcoff_symtab (reader
, objfile
);
3038 /* Install any minimal symbols that have been collected as the current
3039 minimal symbols for this objfile. */
3043 /* DWARF2 sections. */
3045 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3046 dwarf2_build_psymtabs (objfile
);
3048 dwarf2_build_frame_info (objfile
);
3052 xcoff_symfile_offsets (struct objfile
*objfile
,
3053 const struct section_addr_info
*addrs
)
3055 const char *first_section_name
;
3057 default_symfile_offsets (objfile
, addrs
);
3059 /* Oneof the weird side-effects of default_symfile_offsets is that
3060 it sometimes sets some section indices to zero for sections that,
3061 in fact do not exist. See the body of default_symfile_offsets
3062 for more info on when that happens. Undo that, as this then allows
3063 us to test whether the associated section exists or not, and then
3064 access it quickly (without searching it again). */
3066 if (objfile
->num_sections
== 0)
3067 return; /* Is that even possible? Better safe than sorry. */
3070 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3072 if (objfile
->sect_index_text
== 0
3073 && strcmp (first_section_name
, ".text") != 0)
3074 objfile
->sect_index_text
= -1;
3076 if (objfile
->sect_index_data
== 0
3077 && strcmp (first_section_name
, ".data") != 0)
3078 objfile
->sect_index_data
= -1;
3080 if (objfile
->sect_index_bss
== 0
3081 && strcmp (first_section_name
, ".bss") != 0)
3082 objfile
->sect_index_bss
= -1;
3084 if (objfile
->sect_index_rodata
== 0
3085 && strcmp (first_section_name
, ".rodata") != 0)
3086 objfile
->sect_index_rodata
= -1;
3089 /* Register our ability to parse symbols for xcoff BFD files. */
3091 static const struct sym_fns xcoff_sym_fns
=
3094 /* It is possible that coff and xcoff should be merged as
3095 they do have fundamental similarities (for example, the extra storage
3096 classes used for stabs could presumably be recognized in any COFF file).
3097 However, in addition to obvious things like all the csect hair, there are
3098 some subtler differences between xcoffread.c and coffread.c, notably
3099 the fact that coffread.c has no need to read in all the symbols, but
3100 xcoffread.c reads all the symbols and does in fact randomly access them
3101 (in C_BSTAT and line number processing). */
3103 xcoff_new_init
, /* init anything gbl to entire symtab */
3104 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3105 xcoff_initial_scan
, /* read a symbol file into symtab */
3106 NULL
, /* sym_read_psymbols */
3107 xcoff_symfile_finish
, /* finished with file, cleanup */
3108 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3109 default_symfile_segments
, /* Get segment information from a file. */
3110 aix_process_linenos
,
3111 default_symfile_relocate
, /* Relocate a debug section. */
3112 NULL
, /* sym_probe_fns */
3116 /* Same as xcoff_get_n_import_files, but for core files. */
3119 xcoff_get_core_n_import_files (bfd
*abfd
)
3121 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3123 file_ptr offset
= 0;
3127 return -1; /* Not a core file. */
3129 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3135 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3137 next
= bfd_get_32 (abfd
, buf
);
3139 break; /* This is the last entry. */
3143 /* Return the number of entries, excluding the first one, which is
3144 the path to the executable that produced this core file. */
3145 return n_entries
- 1;
3148 /* Return the number of import files (shared libraries) that the given
3149 BFD depends on. Return -1 if this number could not be computed. */
3152 xcoff_get_n_import_files (bfd
*abfd
)
3154 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3158 /* If the ".loader" section does not exist, the objfile is probably
3159 not an executable. Might be a core file... */
3161 return xcoff_get_core_n_import_files (abfd
);
3163 /* The number of entries in the Import Files Table is stored in
3164 field l_nimpid. This field is always at offset 16, and is
3165 always 4 bytes long. Read those 4 bytes. */
3167 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3169 l_nimpid
= bfd_get_32 (abfd
, buf
);
3171 /* By convention, the first entry is the default LIBPATH value
3172 to be used by the system loader, so it does not count towards
3173 the number of import files. */
3174 return l_nimpid
- 1;
3177 /* Free the per-objfile xcoff data. */
3180 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3186 _initialize_xcoffread (void)
3188 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3190 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,