1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2020 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
33 #include "coff/internal.h"
34 #include "libcoff.h" /* FIXME, internal data from BFD */
35 #include "coff/xcoff.h"
37 #include "coff/rs6000.h"
38 #include "xcoffread.h"
42 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "buildsym-legacy.h"
46 #include "stabsread.h"
47 #include "expression.h"
48 #include "complaints.h"
51 #include "gdb-stabs.h"
53 /* For interface with stabsread.c. */
54 #include "aout/stab_gnu.h"
57 /* We put a pointer to this structure in the read_symtab_private field
63 /* First symbol number for this file. */
67 /* Number of symbols in the section of the symbol table devoted to
68 this file's symbols (actually, the section bracketed may contain
69 more than just this file's symbols). If numsyms is 0, the only
70 reason for this thing's existence is the dependency list. Nothing
71 else will happen when it is read in. */
75 /* Position of the start of the line number information for this
77 unsigned int lineno_off
;
80 /* Remember what we deduced to be the source language of this psymtab. */
82 static enum language psymtab_language
= language_unknown
;
85 /* Simplified internal version of coff symbol table information. */
90 int c_symnum
; /* Symbol number of this entry. */
91 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
93 unsigned char c_sclass
;
98 /* Last function's saved coff symbol `cs'. */
100 static struct coff_symbol fcn_cs_saved
;
102 static bfd
*symfile_bfd
;
104 /* Core address of start and end of text of current source file.
105 This is calculated from the first function seen after a C_FILE
109 static CORE_ADDR cur_src_end_addr
;
111 /* Core address of the end of the first object file. */
113 static CORE_ADDR first_object_file_end
;
115 /* Initial symbol-table-debug-string vector length. */
117 #define INITIAL_STABVECTOR_LENGTH 40
119 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
120 there is any reason not to just use a #define, but might as well
121 ask BFD for the size and store it here, I guess. */
123 static unsigned local_symesz
;
125 struct xcoff_symfile_info
127 file_ptr min_lineno_offset
{}; /* Where in file lowest line#s are. */
128 file_ptr max_lineno_offset
{}; /* 1+last byte of line#s in file. */
130 /* Pointer to the string table. */
131 char *strtbl
= nullptr;
133 /* Pointer to debug section. */
134 char *debugsec
= nullptr;
136 /* Pointer to the a.out symbol table. */
137 char *symtbl
= nullptr;
139 /* Number of symbols in symtbl. */
140 int symtbl_num_syms
= 0;
142 /* Offset in data section to TOC anchor. */
143 CORE_ADDR toc_offset
= 0;
146 /* Key for XCOFF-associated data. */
148 static const struct objfile_key
<xcoff_symfile_info
> xcoff_objfile_data_key
;
150 /* Convenience macro to access the per-objfile XCOFF data. */
152 #define XCOFF_DATA(objfile) \
153 xcoff_objfile_data_key.get (objfile)
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_str_offsets */
170 { NULL
, NULL
}, /* debug_line_str */
171 { ".dwrnges", NULL
},
172 { NULL
, NULL
}, /* debug_rnglists */
173 { ".dwpbtyp", NULL
},
174 { NULL
, NULL
}, /* debug_addr */
175 { ".dwframe", NULL
},
176 { NULL
, NULL
}, /* eh_frame */
177 { NULL
, NULL
}, /* gdb_index */
178 { NULL
, NULL
}, /* debug_names */
179 { NULL
, NULL
}, /* debug_aranges */
184 bf_notfound_complaint (void)
186 complaint (_("line numbers off, `.bf' symbol not found"));
190 ef_complaint (int arg1
)
192 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
196 eb_complaint (int arg1
)
198 complaint (_("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
*, legacy_psymtab
*);
236 static void add_stab_to_list (char *, struct pending_stabs
**);
239 static struct linetable
*arrange_linetable (struct linetable
*);
241 static void record_include_end (struct coff_symbol
*);
243 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
246 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
248 static int secnum_to_section (int, struct objfile
*);
249 static asection
*secnum_to_bfd_section (int, struct objfile
*);
251 struct find_targ_sec_arg
256 struct objfile
*objfile
;
259 static void find_targ_sec (bfd
*, asection
*, void *);
262 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
264 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
265 struct objfile
*objfile
= args
->objfile
;
267 if (sect
->target_index
== args
->targ_index
)
269 /* This is the section. Figure out what SECT_OFF_* code it is. */
270 if (bfd_section_flags (sect
) & SEC_CODE
)
271 *args
->resultp
= SECT_OFF_TEXT (objfile
);
272 else if (bfd_section_flags (sect
) & SEC_LOAD
)
273 *args
->resultp
= SECT_OFF_DATA (objfile
);
275 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
276 *args
->bfd_sect
= sect
;
280 /* Search all BFD sections for the section whose target_index is
281 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
282 associated index in the objfile's section_offset table is also
285 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
286 is set to the text section's number. */
289 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
290 asection
**bfd_sect
, int *secnum
)
292 struct find_targ_sec_arg args
;
294 args
.targ_index
= n_scnum
;
295 args
.resultp
= secnum
;
296 args
.bfd_sect
= bfd_sect
;
297 args
.objfile
= objfile
;
300 *secnum
= SECT_OFF_TEXT (objfile
);
302 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
305 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
308 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
313 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
317 /* Return the BFD section that N_SCNUM points to. */
320 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
325 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
329 /* add a given stab string into given stab vector. */
334 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
336 if (*stabvector
== NULL
)
338 *stabvector
= (struct pending_stabs
*)
339 xmalloc (sizeof (struct pending_stabs
) +
340 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
341 (*stabvector
)->count
= 0;
342 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
344 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
346 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
347 *stabvector
= (struct pending_stabs
*)
348 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
349 (*stabvector
)->length
* sizeof (char *));
351 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
356 /* Linenos are processed on a file-by-file basis.
360 1) xlc (IBM's native c compiler) postpones static function code
361 emission to the end of a compilation unit. This way it can
362 determine if those functions (statics) are needed or not, and
363 can do some garbage collection (I think). This makes line
364 numbers and corresponding addresses unordered, and we end up
365 with a line table like:
382 and that breaks gdb's binary search on line numbers, if the
383 above table is not sorted on line numbers. And that sort
384 should be on function based, since gcc can emit line numbers
387 10 0x100 - for the init/test part of a for stmt.
390 10 0x400 - for the increment part of a for stmt.
392 arrange_linetable() will do this sorting.
394 2) aix symbol table might look like:
396 c_file // beginning of a new file
397 .bi // beginning of include file
398 .ei // end of include file
402 basically, .bi/.ei pairs do not necessarily encapsulate
403 their scope. They need to be recorded, and processed later
404 on when we come the end of the compilation unit.
405 Include table (inclTable) and process_linenos() handle
410 /* Given a line table with function entries are marked, arrange its
411 functions in ascending order and strip off function entry markers
412 and return it in a newly created table. If the old one is good
413 enough, return the old one. */
414 /* FIXME: I think all this stuff can be replaced by just passing
415 sort_linevec = 1 to end_symtab. */
417 static struct linetable
*
418 arrange_linetable (struct linetable
*oldLineTb
)
420 int ii
, jj
, newline
, /* new line count */
421 function_count
; /* # of functions */
423 struct linetable_entry
*fentry
; /* function entry vector */
424 int fentry_size
; /* # of function entries */
425 struct linetable
*newLineTb
; /* new line table */
428 #define NUM_OF_FUNCTIONS 20
430 fentry_size
= NUM_OF_FUNCTIONS
;
431 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
433 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
435 if (oldLineTb
->item
[ii
].is_stmt
== 0)
438 if (oldLineTb
->item
[ii
].line
== 0)
439 { /* Function entry found. */
440 if (function_count
>= fentry_size
)
441 { /* Make sure you have room. */
443 fentry
= (struct linetable_entry
*)
445 fentry_size
* sizeof (struct linetable_entry
));
447 fentry
[function_count
].line
= ii
;
448 fentry
[function_count
].is_stmt
= 1;
449 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
452 /* If the function was compiled with XLC, we may have to add an
453 extra line entry later. Reserve space for that. */
454 if (ii
+ 1 < oldLineTb
->nitems
455 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
460 if (function_count
== 0)
465 else if (function_count
> 1)
466 std::sort (fentry
, fentry
+ function_count
,
467 [] (const linetable_entry
<e1
, const linetable_entry
& lte2
)
468 { return lte1
.pc
< lte2
.pc
; });
470 /* Allocate a new line table. */
471 newLineTb
= (struct linetable
*)
473 (sizeof (struct linetable
) +
474 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
476 /* If line table does not start with a function beginning, copy up until
480 if (oldLineTb
->item
[0].line
!= 0)
482 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
483 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
485 /* Now copy function lines one by one. */
487 for (ii
= 0; ii
< function_count
; ++ii
)
489 /* If the function was compiled with XLC, we may have to add an
490 extra line to cover the function prologue. */
491 jj
= fentry
[ii
].line
;
492 if (jj
+ 1 < oldLineTb
->nitems
493 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
495 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
496 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
500 for (jj
= fentry
[ii
].line
+ 1;
501 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
503 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
506 /* The number of items in the line table must include these
507 extra lines which were added in case of XLC compiled functions. */
508 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
512 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
513 following `IncludeChain'. At the end of each symtab (end_symtab),
514 we will determine if we should create additional symtab's to
515 represent if (the include files. */
518 typedef struct _inclTable
520 char *name
; /* include filename */
522 /* Offsets to the line table. end points to the last entry which is
523 part of this include file. */
526 struct subfile
*subfile
;
527 unsigned funStartLine
; /* Start line # of its function. */
531 #define INITIAL_INCLUDE_TABLE_LENGTH 20
532 static InclTable
*inclTable
; /* global include table */
533 static int inclIndx
; /* last entry to table */
534 static int inclLength
; /* table length */
535 static int inclDepth
; /* nested include depth */
537 static void allocate_include_entry (void);
540 record_include_begin (struct coff_symbol
*cs
)
544 /* In xcoff, we assume include files cannot be nested (not in .c files
545 of course, but in corresponding .s files.). */
547 /* This can happen with old versions of GCC.
548 GCC 2.3.3-930426 does not exhibit this on a test case which
549 a user said produced the message for him. */
550 complaint (_("Nested C_BINCL symbols"));
554 allocate_include_entry ();
556 inclTable
[inclIndx
].name
= cs
->c_name
;
557 inclTable
[inclIndx
].begin
= cs
->c_value
;
561 record_include_end (struct coff_symbol
*cs
)
567 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
570 allocate_include_entry ();
572 pTbl
= &inclTable
[inclIndx
];
573 pTbl
->end
= cs
->c_value
;
580 allocate_include_entry (void)
582 if (inclTable
== NULL
)
584 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
585 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
588 else if (inclIndx
>= inclLength
)
590 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
591 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
592 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
593 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
597 /* Global variable to pass the psymtab down to all the routines involved
598 in psymtab to symtab processing. */
599 static legacy_psymtab
*this_symtab_psymtab
;
601 /* Objfile related to this_symtab_psymtab; set at the same time. */
602 static struct objfile
*this_symtab_objfile
;
604 /* given the start and end addresses of a compilation unit (or a csect,
605 at times) process its lines and create appropriate line vectors. */
608 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
612 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
614 /* subfile structure for the main compilation unit. */
615 struct subfile main_subfile
;
617 /* In the main source file, any time we see a function entry, we
618 reset this variable to function's absolute starting line number.
619 All the following line numbers in the function are relative to
620 this, and we record absolute line numbers in record_line(). */
622 unsigned int main_source_baseline
= 0;
627 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
629 goto return_after_cleanup
;
631 memset (&main_subfile
, '\0', sizeof (main_subfile
));
634 /* All source lines were in the main source file. None in include
637 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
638 &main_source_baseline
);
642 /* There was source with line numbers in include files. */
645 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
646 main_source_baseline
= 0;
648 for (ii
= 0; ii
< inclIndx
; ++ii
)
650 struct subfile
*tmpSubfile
;
652 /* If there is main file source before include file, enter it. */
653 if (offset
< inclTable
[ii
].begin
)
656 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
657 start
, 0, &main_source_baseline
);
660 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
662 /* The entry in the include table refers to the main source
663 file. Add the lines to the main subfile. */
665 main_source_baseline
= inclTable
[ii
].funStartLine
;
667 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
668 start
, 0, &main_source_baseline
);
669 inclTable
[ii
].subfile
= &main_subfile
;
673 /* Have a new subfile for the include file. */
675 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
677 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
678 firstLine
= &(inclTable
[ii
].funStartLine
);
680 /* Enter include file's lines now. */
681 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
682 inclTable
[ii
].end
, start
, 0, firstLine
);
685 if (offset
<= inclTable
[ii
].end
)
686 offset
= inclTable
[ii
].end
+ linesz
;
689 /* All the include files' line have been processed at this point. Now,
690 enter remaining lines of the main file, if any left. */
691 if (offset
< max_offset
+ 1 - linesz
)
693 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
694 &main_source_baseline
);
698 /* Process main file's line numbers. */
699 if (main_subfile
.line_vector
)
701 struct linetable
*lineTb
, *lv
;
703 lv
= main_subfile
.line_vector
;
705 /* Line numbers are not necessarily ordered. xlc compilation will
706 put static function to the end. */
708 struct subfile
*current_subfile
= get_current_subfile ();
709 lineTb
= arrange_linetable (lv
);
712 current_subfile
->line_vector
= (struct linetable
*)
713 xrealloc (lv
, (sizeof (struct linetable
)
714 + lv
->nitems
* sizeof (struct linetable_entry
)));
719 current_subfile
->line_vector
= lineTb
;
722 current_subfile
->line_vector_length
=
723 current_subfile
->line_vector
->nitems
;
726 /* Now, process included files' line numbers. */
728 for (ii
= 0; ii
< inclIndx
; ++ii
)
730 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
731 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
734 struct linetable
*lineTb
, *lv
;
736 lv
= (inclTable
[ii
].subfile
)->line_vector
;
738 /* Line numbers are not necessarily ordered. xlc compilation will
739 put static function to the end. */
741 lineTb
= arrange_linetable (lv
);
745 /* For the same include file, we might want to have more than one
746 subfile. This happens if we have something like:
754 while foo.h including code in it. (stupid but possible)
755 Since start_subfile() looks at the name and uses an
756 existing one if finds, we need to provide a fake name and
760 start_subfile (inclTable
[ii
].name
);
763 /* Pick a fake name that will produce the same results as this
764 one when passed to deduce_language_from_filename. Kludge on
766 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
768 if (fakename
== NULL
)
770 start_subfile (fakename
);
771 xfree (get_current_subfile ()->name
);
773 struct subfile
*current_subfile
= get_current_subfile ();
774 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
779 current_subfile
->line_vector
=
780 (struct linetable
*) xrealloc
781 (lv
, (sizeof (struct linetable
)
782 + lv
->nitems
* sizeof (struct linetable_entry
)));
788 current_subfile
->line_vector
= lineTb
;
791 current_subfile
->line_vector_length
=
792 current_subfile
->line_vector
->nitems
;
793 start_subfile (pop_subfile ());
797 return_after_cleanup
:
799 /* We don't want to keep alloc/free'ing the global include file table. */
804 aix_process_linenos (struct objfile
*objfile
)
806 /* There is no linenos to read if there are only dwarf info. */
807 if (this_symtab_psymtab
== NULL
)
810 /* Process line numbers and enter them into line vector. */
811 process_linenos (get_last_source_start_addr (), cur_src_end_addr
);
815 /* Enter a given range of lines into the line vector.
816 can be called in the following two ways:
817 enter_line_range (subfile, beginoffset, endoffset,
818 startaddr, 0, firstLine) or
819 enter_line_range (subfile, beginoffset, 0,
820 startaddr, endaddr, firstLine)
822 endoffset points to the last line table entry that we should pay
826 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
827 unsigned endoffset
, /* offsets to line table */
828 CORE_ADDR startaddr
, /* offsets to line table */
829 CORE_ADDR endaddr
, unsigned *firstLine
)
831 struct objfile
*objfile
= this_symtab_objfile
;
832 struct gdbarch
*gdbarch
= objfile
->arch ();
833 unsigned int curoffset
;
836 struct internal_lineno int_lnno
;
837 unsigned int limit_offset
;
841 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
843 curoffset
= beginoffset
;
844 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
848 if (endoffset
>= limit_offset
)
850 complaint (_("Bad line table offset in C_EINCL directive"));
853 limit_offset
= endoffset
;
858 abfd
= objfile
->obfd
;
859 linesz
= coff_data (abfd
)->local_linesz
;
860 ext_lnno
= alloca (linesz
);
862 while (curoffset
<= limit_offset
)
864 bfd_seek (abfd
, curoffset
, SEEK_SET
);
865 bfd_bread (ext_lnno
, linesz
, abfd
);
866 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
868 /* Find the address this line represents. */
869 addr
= (int_lnno
.l_lnno
870 ? int_lnno
.l_addr
.l_paddr
871 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
872 addr
+= objfile
->text_section_offset ();
874 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
877 if (int_lnno
.l_lnno
== 0)
879 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
880 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
884 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
885 gdbarch_addr_bits_remove (gdbarch
, addr
));
891 /* Save the vital information for use when closing off the current file.
892 NAME is the file name the symbols came from, START_ADDR is the first
893 text address for the file, and SIZE is the number of bytes of text. */
895 #define complete_symtab(name, start_addr) { \
896 set_last_source_file (name); \
897 set_last_source_start_addr (start_addr); \
901 /* Refill the symbol table input buffer
902 and set the variables that control fetching entries from it.
903 Reports an error if no data available.
904 This function can read past the end of the symbol table
905 (into the string table) but this does no harm. */
907 /* Create a new minimal symbol (using record_with_info).
909 Creation of all new minimal symbols should go through this function
910 rather than calling the various record functions in order
911 to make sure that all symbol addresses get properly relocated.
915 NAME - the symbol's name (but if NAME starts with a period, that
916 leading period is discarded).
917 ADDRESS - the symbol's address, prior to relocation. This function
918 relocates the address before recording the minimal symbol.
919 MS_TYPE - the symbol's type.
920 N_SCNUM - the symbol's XCOFF section number.
921 OBJFILE - the objfile associated with the minimal symbol. */
924 record_minimal_symbol (minimal_symbol_reader
&reader
,
925 const char *name
, CORE_ADDR address
,
926 enum minimal_symbol_type ms_type
,
928 struct objfile
*objfile
)
933 reader
.record_with_info (name
, address
, ms_type
,
934 secnum_to_section (n_scnum
, objfile
));
937 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
938 nested. At any given time, a symbol can only be in one static block.
939 This is the base address of current static block, zero if non exists. */
941 static int static_block_base
= 0;
943 /* Section number for the current static block. */
945 static int static_block_section
= -1;
947 /* true if space for symbol name has been allocated. */
949 static int symname_alloced
= 0;
951 /* Next symbol to read. Pointer into raw seething symbol table. */
953 static char *raw_symbol
;
955 /* This is the function which stabsread.c calls to get symbol
959 xcoff_next_symbol_text (struct objfile
*objfile
)
961 struct internal_syment symbol
;
964 /* FIXME: is this the same as the passed arg? */
965 if (this_symtab_objfile
)
966 objfile
= this_symtab_objfile
;
968 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
971 complaint (_("Unexpected symbol continuation"));
973 /* Return something which points to '\0' and hope the symbol reading
974 code does something reasonable. */
977 else if (symbol
.n_sclass
& 0x80)
979 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
980 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
985 complaint (_("Unexpected symbol continuation"));
987 /* Return something which points to '\0' and hope the symbol reading
988 code does something reasonable. */
994 /* Read symbols for a given partial symbol table. */
997 read_xcoff_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
999 bfd
*abfd
= objfile
->obfd
;
1000 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1001 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1002 char *strtbl
= xcoff
->strtbl
;
1003 char *debugsec
= xcoff
->debugsec
;
1004 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1006 struct internal_syment symbol
[1];
1007 union internal_auxent main_aux
;
1008 struct coff_symbol cs
[1];
1009 CORE_ADDR file_start_addr
= 0;
1010 CORE_ADDR file_end_addr
= 0;
1012 int next_file_symnum
= -1;
1013 unsigned int max_symnum
;
1014 int just_started
= 1;
1016 CORE_ADDR fcn_start_addr
= 0;
1017 enum language pst_symtab_language
;
1019 struct coff_symbol fcn_stab_saved
= { 0 };
1021 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1022 union internal_auxent fcn_aux_saved
= main_aux
;
1023 struct context_stack
*newobj
;
1025 const char *filestring
= pst
->filename
; /* Name of the current file. */
1027 const char *last_csect_name
; /* Last seen csect's name. */
1029 this_symtab_psymtab
= pst
;
1030 this_symtab_objfile
= objfile
;
1032 /* Get the appropriate COFF "constants" related to the file we're
1034 local_symesz
= coff_data (abfd
)->local_symesz
;
1036 set_last_source_file (NULL
);
1037 last_csect_name
= 0;
1038 pst_symtab_language
= deduce_language_from_filename (filestring
);
1041 start_symtab (objfile
, filestring
, NULL
, file_start_addr
,
1042 pst_symtab_language
);
1043 record_debugformat (debugfmt
);
1044 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1046 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1047 first_object_file_end
= 0;
1049 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1051 while (symnum
< max_symnum
)
1053 QUIT
; /* make this command interruptable. */
1055 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1056 /* read one symbol into `cs' structure. After processing the
1057 whole symbol table, only string table will be kept in memory,
1058 symbol table and debug section of xcoff will be freed. Thus
1059 we can mark symbols with names in string table as
1064 /* Swap and align the symbol into a reasonable C structure. */
1065 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1067 cs
->c_symnum
= symnum
;
1068 cs
->c_naux
= symbol
->n_numaux
;
1069 if (symbol
->n_zeroes
)
1071 symname_alloced
= 0;
1072 /* We must use the original, unswapped, name here so the name field
1073 pointed to by cs->c_name will persist throughout xcoffread. If
1074 we use the new field, it gets overwritten for each symbol. */
1075 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1076 /* If it's exactly E_SYMNMLEN characters long it isn't
1078 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1082 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1084 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1085 p
[E_SYMNMLEN
] = '\0';
1087 symname_alloced
= 1;
1090 else if (symbol
->n_sclass
& 0x80)
1092 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1093 symname_alloced
= 0;
1097 /* in string table */
1098 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1099 symname_alloced
= 1;
1101 cs
->c_value
= symbol
->n_value
;
1102 cs
->c_sclass
= symbol
->n_sclass
;
1103 cs
->c_secnum
= symbol
->n_scnum
;
1104 cs
->c_type
= (unsigned) symbol
->n_type
;
1106 raw_symbol
+= local_symesz
;
1109 /* Save addr of first aux entry. */
1110 raw_auxptr
= raw_symbol
;
1112 /* Skip all the auxents associated with this symbol. */
1113 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1115 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1120 /* if symbol name starts with ".$" or "$", ignore it. */
1121 if (cs
->c_name
[0] == '$'
1122 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1125 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1127 if (get_last_source_file ())
1129 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1130 SECT_OFF_TEXT (objfile
));
1135 start_symtab (objfile
, "_globals_", NULL
,
1136 0, pst_symtab_language
);
1137 record_debugformat (debugfmt
);
1138 cur_src_end_addr
= first_object_file_end
;
1139 /* Done with all files, everything from here on is globals. */
1142 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1143 cs
->c_sclass
== C_WEAKEXT
)
1145 /* Dealing with a symbol with a csect entry. */
1147 #define CSECT(PP) ((PP)->x_csect)
1148 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1149 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1150 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1151 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1153 /* Convert the auxent to something we can access.
1154 XCOFF can have more than one auxiliary entries.
1156 Actual functions will have two auxiliary entries, one to have the
1157 function size and other to have the smtype/smclass (LD/PR).
1159 c_type value of main symbol table will be set only in case of
1160 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1161 Bit 10 of type is set if symbol is a function, ie the value is set
1162 to 32(0x20). So we need to read the first function auxiliary entry
1163 which contains the size. */
1164 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1166 /* a function entry point. */
1168 fcn_start_addr
= cs
->c_value
;
1170 /* save the function header info, which will be used
1171 when `.bf' is seen. */
1174 /* Convert the auxent to something we can access. */
1175 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1176 0, cs
->c_naux
, &fcn_aux_saved
);
1179 /* Read the csect auxiliary header, which is always the last by
1181 bfd_coff_swap_aux_in (abfd
,
1183 + ((coff_data (abfd
)->local_symesz
)
1184 * (cs
->c_naux
- 1)),
1185 cs
->c_type
, cs
->c_sclass
,
1186 cs
->c_naux
- 1, cs
->c_naux
,
1189 switch (CSECT_SMTYP (&main_aux
))
1193 /* Ignore all external references. */
1197 /* A section description. */
1199 switch (CSECT_SCLAS (&main_aux
))
1205 /* A program csect is seen. We have to allocate one
1206 symbol table for each program csect. Normally gdb
1207 prefers one symtab for each source file. In case
1208 of AIX, one source file might include more than one
1209 [PR] csect, and they don't have to be adjacent in
1210 terms of the space they occupy in memory. Thus, one
1211 single source file might get fragmented in the
1212 memory and gdb's file start and end address
1213 approach does not work! GCC (and I think xlc) seem
1214 to put all the code in the unnamed program csect. */
1216 if (last_csect_name
)
1218 complete_symtab (filestring
, file_start_addr
);
1219 cur_src_end_addr
= file_end_addr
;
1220 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1223 /* Give all csects for this source file the same
1225 start_symtab (objfile
, filestring
, NULL
,
1226 0, pst_symtab_language
);
1227 record_debugformat (debugfmt
);
1230 /* If this is the very first csect seen,
1231 basically `__start'. */
1234 first_object_file_end
1235 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1240 cs
->c_value
+ objfile
->text_section_offset ();
1241 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1243 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1244 last_csect_name
= cs
->c_name
;
1248 /* All other symbols are put into the minimal symbol
1261 /* Ignore the symbol. */
1269 switch (CSECT_SCLAS (&main_aux
))
1271 /* We never really come to this part as this case has been
1272 handled in ISFCN check above.
1273 This and other cases of XTY_LD are kept just for
1279 /* shared library function trampoline code entry point. */
1283 /* The symbols often have the same names as debug symbols for
1284 functions, and confuse lookup_symbol. */
1288 /* xlc puts each variable in a separate csect, so we get
1289 an XTY_SD for each variable. But gcc puts several
1290 variables in a csect, so that each variable only gets
1291 an XTY_LD. This will typically be XMC_RW; I suspect
1292 XMC_RO and XMC_BS might be possible too.
1293 These variables are put in the minimal symbol table
1300 /* Common symbols are put into the minimal symbol table only. */
1308 switch (cs
->c_sclass
)
1312 /* c_value field contains symnum of next .file entry in table
1313 or symnum of first global after last .file. */
1315 next_file_symnum
= cs
->c_value
;
1317 /* Complete symbol table for last object file containing
1318 debugging information. */
1320 /* Whether or not there was a csect in the previous file, we
1321 have to call `end_stabs' and `start_stabs' to reset
1322 type_vector, line_vector, etc. structures. */
1324 complete_symtab (filestring
, file_start_addr
);
1325 cur_src_end_addr
= file_end_addr
;
1326 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1329 /* XCOFF, according to the AIX 3.2 documentation, puts the
1330 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1331 do things the standard COFF way and put it in the auxent.
1332 We use the auxent if the symbol is ".file" and an auxent
1333 exists, otherwise use the symbol itself. Simple
1335 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1337 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1338 0, cs
->c_naux
, &main_aux
);
1339 filestring
= coff_getfilename (&main_aux
, objfile
);
1342 filestring
= cs
->c_name
;
1345 start_symtab (objfile
, filestring
, NULL
, 0, pst_symtab_language
);
1346 record_debugformat (debugfmt
);
1347 last_csect_name
= 0;
1349 /* reset file start and end addresses. A compilation unit
1350 with no text (only data) should have zero file
1352 file_start_addr
= file_end_addr
= 0;
1356 fcn_stab_saved
= *cs
;
1360 if (strcmp (cs
->c_name
, ".bf") == 0)
1362 CORE_ADDR off
= objfile
->text_section_offset ();
1364 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1365 0, cs
->c_naux
, &main_aux
);
1367 within_function
= 1;
1369 newobj
= push_context (0, fcn_start_addr
+ off
);
1371 newobj
->name
= define_symbol
1372 (fcn_cs_saved
.c_value
+ off
,
1373 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1374 if (newobj
->name
!= NULL
)
1375 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1377 else if (strcmp (cs
->c_name
, ".ef") == 0)
1379 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1380 0, cs
->c_naux
, &main_aux
);
1382 /* The value of .ef is the address of epilogue code;
1383 not useful for gdb. */
1384 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1385 contains number of lines to '}' */
1387 if (outermost_context_p ())
1388 { /* We attempted to pop an empty context stack. */
1389 ef_complaint (cs
->c_symnum
);
1390 within_function
= 0;
1393 struct context_stack cstk
= pop_context ();
1394 /* Stack must be empty now. */
1395 if (!outermost_context_p ())
1397 ef_complaint (cs
->c_symnum
);
1398 within_function
= 0;
1402 finish_block (cstk
.name
, cstk
.old_blocks
,
1403 NULL
, cstk
.start_addr
,
1404 (fcn_cs_saved
.c_value
1405 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1406 + objfile
->text_section_offset ()));
1407 within_function
= 0;
1412 /* Begin static block. */
1414 struct internal_syment static_symbol
;
1416 read_symbol (&static_symbol
, cs
->c_value
);
1417 static_block_base
= static_symbol
.n_value
;
1418 static_block_section
=
1419 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1424 /* End of static block. */
1425 static_block_base
= 0;
1426 static_block_section
= -1;
1437 complaint (_("Unrecognized storage class %d."),
1452 /* beginning of include file */
1453 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1454 order. Thus, when wee see them, we might not know enough info
1455 to process them. Thus, we'll be saving them into a table
1456 (inclTable) and postpone their processing. */
1458 record_include_begin (cs
);
1462 /* End of include file. */
1463 /* See the comment after case C_BINCL. */
1464 record_include_end (cs
);
1468 if (strcmp (cs
->c_name
, ".bb") == 0)
1471 newobj
= push_context (depth
,
1473 + objfile
->text_section_offset ()));
1475 else if (strcmp (cs
->c_name
, ".eb") == 0)
1477 if (outermost_context_p ())
1478 { /* We attempted to pop an empty context stack. */
1479 eb_complaint (cs
->c_symnum
);
1482 struct context_stack cstk
= pop_context ();
1483 if (depth
-- != cstk
.depth
)
1485 eb_complaint (cs
->c_symnum
);
1488 if (*get_local_symbols () && !outermost_context_p ())
1490 /* Make a block for the local symbols within. */
1491 finish_block (cstk
.name
,
1492 cstk
.old_blocks
, NULL
,
1495 + objfile
->text_section_offset ()));
1497 *get_local_symbols () = cstk
.locals
;
1502 process_xcoff_symbol (cs
, objfile
);
1507 if (get_last_source_file ())
1509 struct compunit_symtab
*cust
;
1511 complete_symtab (filestring
, file_start_addr
);
1512 cur_src_end_addr
= file_end_addr
;
1513 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1514 /* When reading symbols for the last C_FILE of the objfile, try
1515 to make sure that we set pst->compunit_symtab to the symtab for the
1516 file, not to the _globals_ symtab. I'm not sure whether this
1517 actually works right or when/if it comes up. */
1518 if (pst
->compunit_symtab
== NULL
)
1519 pst
->compunit_symtab
= cust
;
1524 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1525 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1529 /* process one xcoff symbol. */
1531 static struct symbol
*
1532 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1534 struct symbol onesymbol
;
1535 struct symbol
*sym
= &onesymbol
;
1536 struct symbol
*sym2
= NULL
;
1542 if (cs
->c_secnum
< 0)
1544 /* The value is a register number, offset within a frame, etc.,
1545 and does not get relocated. */
1551 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1552 off
= objfile
->section_offsets
[sec
];
1559 /* default assumptions */
1560 SET_SYMBOL_VALUE_ADDRESS (sym
, cs
->c_value
+ off
);
1561 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1562 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1564 if (ISFCN (cs
->c_type
))
1566 /* At this point, we don't know the type of the function. This
1567 will be patched with the type from its stab entry later on in
1568 patch_block_stabs (), unless the file was compiled without -g. */
1570 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1571 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1573 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1574 sym2
= new (&objfile
->objfile_obstack
) symbol (*sym
);
1576 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1577 add_symbol_to_list (sym2
, get_global_symbols ());
1578 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1579 add_symbol_to_list (sym2
, get_file_symbols ());
1583 /* In case we can't figure out the type, provide default. */
1584 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1586 switch (cs
->c_sclass
)
1589 /* The values of functions and global symbols are now resolved
1590 via the global_sym_chain in stabsread.c. */
1592 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1593 add_stab_to_list (name
, &global_stabs
);
1595 add_stab_to_list (name
, &file_stabs
);
1599 add_stab_to_list (name
, &global_stabs
);
1604 common_block_start (cs
->c_name
, objfile
);
1608 common_block_end (objfile
);
1612 complaint (_("Unexpected storage class: %d"),
1625 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1628 SYMBOL_SECTION (sym
) = sec
;
1635 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1636 all statics and we need to distinguish file-scope versus
1637 function-scope using within_function. We do this by
1638 changing the string we pass to define_symbol to use 'S'
1639 where we need to, which is not necessarily super-clean,
1640 but seems workable enough. */
1645 pp
= strchr (name
, ':');
1650 if (*pp
== 'V' && !within_function
)
1652 sym
= define_symbol ((cs
->c_value
1653 + objfile
->section_offsets
[static_block_section
]),
1654 cs
->c_name
, 0, 0, objfile
);
1657 SET_SYMBOL_VALUE_ADDRESS (sym
,
1658 SYMBOL_VALUE_ADDRESS (sym
)
1659 + static_block_base
);
1660 SYMBOL_SECTION (sym
) = static_block_section
;
1669 /* Extract the file name from the aux entry of a C_FILE symbol.
1670 Result is in static storage and is only good for temporary use. */
1673 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1675 static char buffer
[BUFSIZ
];
1677 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1678 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1679 + aux_entry
->x_file
.x_n
.x_offset
));
1682 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1683 buffer
[FILNMLEN
] = '\0';
1688 /* Set *SYMBOL to symbol number symno in symtbl. */
1690 read_symbol (struct internal_syment
*symbol
, int symno
)
1692 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1693 int nsyms
= xcoff
->symtbl_num_syms
;
1694 char *stbl
= xcoff
->symtbl
;
1696 if (symno
< 0 || symno
>= nsyms
)
1698 complaint (_("Invalid symbol offset"));
1699 symbol
->n_value
= 0;
1700 symbol
->n_scnum
= -1;
1703 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1704 stbl
+ (symno
* local_symesz
),
1708 /* Get value corresponding to symbol number symno in symtbl. */
1711 read_symbol_nvalue (int symno
)
1713 struct internal_syment symbol
[1];
1715 read_symbol (symbol
, symno
);
1716 return symbol
->n_value
;
1720 /* Find the address of the function corresponding to symno, where
1721 symno is the symbol pointed to by the linetable. */
1724 read_symbol_lineno (int symno
)
1726 struct objfile
*objfile
= this_symtab_objfile
;
1727 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1729 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1730 int nsyms
= info
->symtbl_num_syms
;
1731 char *stbl
= info
->symtbl
;
1732 char *strtbl
= info
->strtbl
;
1734 struct internal_syment symbol
[1];
1735 union internal_auxent main_aux
[1];
1739 bf_notfound_complaint ();
1743 /* Note that just searching for a short distance (e.g. 50 symbols)
1744 is not enough, at least in the following case.
1747 [many .stabx entries]
1748 [a few functions, referring to foo]
1752 What happens here is that the assembler moves the .stabx entries
1753 to right before the ".bf" for foo, but the symbol for "foo" is before
1754 all the stabx entries. See PR gdb/2222. */
1756 /* Maintaining a table of .bf entries might be preferable to this search.
1757 If I understand things correctly it would need to be done only for
1758 the duration of a single psymtab to symtab conversion. */
1759 while (symno
< nsyms
)
1761 bfd_coff_swap_sym_in (symfile_bfd
,
1762 stbl
+ (symno
* local_symesz
), symbol
);
1763 if (symbol
->n_sclass
== C_FCN
)
1765 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1767 if (strcmp (name
, ".bf") == 0)
1770 symno
+= symbol
->n_numaux
+ 1;
1773 bf_notfound_complaint ();
1777 /* Take aux entry and return its lineno. */
1779 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1780 symbol
->n_type
, symbol
->n_sclass
,
1781 0, symbol
->n_numaux
, main_aux
);
1783 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1786 /* Support for line number handling. */
1788 /* This function is called for every section; it finds the outer limits
1789 * of the line table (minimum and maximum file offset) so that the
1790 * mainline code can read the whole thing for efficiency.
1793 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1795 struct xcoff_symfile_info
*info
;
1797 file_ptr offset
, maxoff
;
1799 count
= asect
->lineno_count
;
1801 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1804 size
= count
* coff_data (abfd
)->local_linesz
;
1805 info
= (struct xcoff_symfile_info
*) vpinfo
;
1806 offset
= asect
->line_filepos
;
1807 maxoff
= offset
+ size
;
1809 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1810 info
->min_lineno_offset
= offset
;
1812 if (maxoff
> info
->max_lineno_offset
)
1813 info
->max_lineno_offset
= maxoff
;
1817 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1819 gdb_assert (!pst
->readin
);
1821 /* Read in all partial symtabs on which this one is dependent. */
1822 pst
->expand_dependencies (objfile
);
1824 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1826 /* Init stuff necessary for reading in symbols. */
1829 scoped_free_pendings free_pending
;
1830 read_xcoff_symtab (objfile
, pst
);
1836 /* Read in all of the symbols for a given psymtab for real.
1837 Be verbose about it if the user wants that. SELF is not NULL. */
1840 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1842 gdb_assert (!self
->readin
);
1844 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1845 || self
->number_of_dependencies
)
1847 next_symbol_text_func
= xcoff_next_symbol_text
;
1849 self
->expand_psymtab (objfile
);
1851 /* Match with global symbols. This only needs to be done once,
1852 after all of the symtabs and dependencies have been read in. */
1853 scan_file_globals (objfile
);
1858 xcoff_new_init (struct objfile
*objfile
)
1860 stabsread_new_init ();
1863 /* Do initialization in preparation for reading symbols from OBJFILE.
1865 We will only be called if this is an XCOFF or XCOFF-like file.
1866 BFD handles figuring out the format of the file, and code in symfile.c
1867 uses BFD's determination to vector to us. */
1870 xcoff_symfile_init (struct objfile
*objfile
)
1872 /* Allocate struct to keep track of the symfile. */
1873 xcoff_objfile_data_key
.emplace (objfile
);
1875 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1876 find this causes a significant slowdown in gdb then we could
1877 set it in the debug symbol readers only when necessary. */
1878 objfile
->flags
|= OBJF_REORDERED
;
1881 /* Perform any local cleanups required when we are done with a particular
1882 objfile. I.E, we are in the process of discarding all symbol information
1883 for an objfile, freeing up all memory held for it, and unlinking the
1884 objfile struct from the global list of known objfiles. */
1887 xcoff_symfile_finish (struct objfile
*objfile
)
1889 /* Start with a fresh include table for the next objfile. */
1895 inclIndx
= inclLength
= inclDepth
= 0;
1900 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1904 unsigned char lengthbuf
[4];
1906 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1908 xcoff
->strtbl
= NULL
;
1910 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1911 error (_("cannot seek to string table in %s: %s"),
1912 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1914 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1915 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1917 /* If no string table is needed, then the file may end immediately
1918 after the symbols. Just return with `strtbl' set to NULL. */
1920 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1923 /* Allocate string table from objfile_obstack. We will need this table
1924 as long as we have its symbol table around. */
1926 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1927 xcoff
->strtbl
= strtbl
;
1929 /* Copy length buffer, the first byte is usually zero and is
1930 used for stabs with a name length of zero. */
1931 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1932 if (length
== sizeof lengthbuf
)
1935 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1937 if (val
!= length
- sizeof lengthbuf
)
1938 error (_("cannot read string table from %s: %s"),
1939 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1940 if (strtbl
[length
- 1] != '\0')
1941 error (_("bad symbol file: string table "
1942 "does not end with null character"));
1947 /* If we have not yet seen a function for this psymtab, this is 0. If we
1948 have seen one, it is the offset in the line numbers of the line numbers
1950 static unsigned int first_fun_line_offset
;
1952 /* Allocate and partially fill a partial symtab. It will be
1953 completely filled at the end of the symbol list.
1955 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1956 is the address relative to which its symbols are (incremental) or 0
1959 static legacy_psymtab
*
1960 xcoff_start_psymtab (struct objfile
*objfile
,
1961 const char *filename
, int first_symnum
)
1963 /* We fill in textlow later. */
1964 legacy_psymtab
*result
= new legacy_psymtab (filename
, objfile
, 0);
1966 result
->read_symtab_private
=
1967 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1968 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1969 result
->legacy_read_symtab
= xcoff_read_symtab
;
1970 result
->legacy_expand_psymtab
= xcoff_expand_psymtab
;
1972 /* Deduce the source language from the filename for this psymtab. */
1973 psymtab_language
= deduce_language_from_filename (filename
);
1978 /* Close off the current usage of PST.
1979 Returns PST, or NULL if the partial symtab was empty and thrown away.
1981 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1983 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1984 are the information for includes and dependencies. */
1986 static legacy_psymtab
*
1987 xcoff_end_psymtab (struct objfile
*objfile
, legacy_psymtab
*pst
,
1988 const char **include_list
, int num_includes
,
1989 int capping_symbol_number
,
1990 legacy_psymtab
**dependency_list
,
1991 int number_dependencies
, int textlow_not_set
)
1995 if (capping_symbol_number
!= -1)
1996 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
1997 capping_symbol_number
1998 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1999 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2000 first_fun_line_offset
;
2001 first_fun_line_offset
= 0;
2003 end_psymtab_common (objfile
, pst
);
2005 pst
->number_of_dependencies
= number_dependencies
;
2006 if (number_dependencies
)
2009 = objfile
->partial_symtabs
->allocate_dependencies (number_dependencies
);
2010 memcpy (pst
->dependencies
, dependency_list
,
2011 number_dependencies
* sizeof (legacy_psymtab
*));
2014 pst
->dependencies
= 0;
2016 for (i
= 0; i
< num_includes
; i
++)
2018 legacy_psymtab
*subpst
=
2019 new legacy_psymtab (include_list
[i
], objfile
);
2021 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, symloc
);
2022 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2023 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2025 /* We could save slight bits of space by only making one of these,
2026 shared by the entire set of include files. FIXME-someday. */
2027 subpst
->dependencies
=
2028 objfile
->partial_symtabs
->allocate_dependencies (1);
2029 subpst
->dependencies
[0] = pst
;
2030 subpst
->number_of_dependencies
= 1;
2032 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
2033 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
2036 if (num_includes
== 0
2037 && number_dependencies
== 0
2038 && pst
->n_global_syms
== 0
2039 && pst
->n_static_syms
== 0)
2041 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2042 it is on the obstack, but we can forget to chain it on the list. */
2043 /* Empty psymtabs happen as a result of header files which don't have
2044 any symbols in them. There can be a lot of them. */
2046 objfile
->partial_symtabs
->discard_psymtab (pst
);
2048 /* Indicate that psymtab was thrown away. */
2054 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2055 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2056 the symbol and its auxents. */
2059 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2060 const char **name
, char **raw
, unsigned int *symnump
,
2061 struct objfile
*objfile
)
2063 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2064 if (symbol
->n_zeroes
)
2066 /* If it's exactly E_SYMNMLEN characters long it isn't
2068 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2070 /* FIXME: wastes memory for symbols which we don't end up putting
2071 into the minimal symbols. */
2074 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2076 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2077 p
[E_SYMNMLEN
] = '\0';
2081 /* Point to the unswapped name as that persists as long as the
2083 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2085 else if (symbol
->n_sclass
& 0x80)
2087 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2091 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2094 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2095 if (symbol
->n_numaux
> 0)
2097 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2098 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2100 *symnump
+= symbol
->n_numaux
;
2101 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2106 function_outside_compilation_unit_complaint (const char *arg1
)
2108 complaint (_("function `%s' appears to be defined "
2109 "outside of all compilation units"),
2114 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2115 struct objfile
*objfile
)
2117 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2118 const char *filestring
= NULL
;
2120 const char *namestring
;
2125 /* Current partial symtab */
2126 legacy_psymtab
*pst
;
2128 /* List of current psymtab's include files. */
2129 const char **psymtab_include_list
;
2130 int includes_allocated
;
2133 /* Index within current psymtab dependency list. */
2134 legacy_psymtab
**dependency_list
;
2135 int dependencies_used
, dependencies_allocated
;
2138 struct internal_syment symbol
;
2139 union internal_auxent main_aux
[5];
2140 unsigned int ssymnum
;
2142 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2143 CORE_ADDR last_csect_val
= 0;
2144 int last_csect_sec
= 0;
2145 int misc_func_recorded
= 0; /* true if any misc. function. */
2146 int textlow_not_set
= 1;
2148 pst
= (legacy_psymtab
*) 0;
2150 includes_allocated
= 30;
2152 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2153 sizeof (const char *));
2155 dependencies_allocated
= 30;
2156 dependencies_used
= 0;
2158 (legacy_psymtab
**) alloca (dependencies_allocated
*
2159 sizeof (legacy_psymtab
*));
2161 set_last_source_file (NULL
);
2163 abfd
= objfile
->obfd
;
2164 next_symbol_text_func
= xcoff_next_symbol_text
;
2166 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2167 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2169 while (ssymnum
< nsyms
)
2175 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2176 sclass
= symbol
.n_sclass
;
2184 /* The CSECT auxent--always the last auxent. */
2185 union internal_auxent csect_aux
;
2186 unsigned int symnum_before
= ssymnum
;
2188 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2190 if (symbol
.n_numaux
> 1)
2192 bfd_coff_swap_aux_in
2194 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2197 symbol
.n_numaux
- 1,
2202 csect_aux
= main_aux
[0];
2204 /* If symbol name starts with ".$" or "$", ignore it. */
2205 if (namestring
[0] == '$'
2206 || (namestring
[0] == '.' && namestring
[1] == '$'))
2209 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2212 switch (csect_aux
.x_csect
.x_smclas
)
2215 if (last_csect_name
)
2217 /* If no misc. function recorded in the last
2218 seen csect, enter it as a function. This
2219 will take care of functions like strcmp()
2222 if (!misc_func_recorded
)
2224 record_minimal_symbol
2225 (reader
, last_csect_name
, last_csect_val
,
2226 mst_text
, last_csect_sec
, objfile
);
2227 misc_func_recorded
= 1;
2232 /* We have to allocate one psymtab for
2233 each program csect, because their text
2234 sections need not be adjacent. */
2236 (objfile
, pst
, psymtab_include_list
,
2237 includes_used
, symnum_before
, dependency_list
,
2238 dependencies_used
, textlow_not_set
);
2240 dependencies_used
= 0;
2241 /* Give all psymtabs for this source file the same
2243 pst
= xcoff_start_psymtab
2249 /* Activate the misc_func_recorded mechanism for
2250 compiler- and linker-generated CSECTs like ".strcmp"
2252 if (namestring
&& (namestring
[0] == '.'
2253 || namestring
[0] == '@'))
2255 last_csect_name
= namestring
;
2256 last_csect_val
= symbol
.n_value
;
2257 last_csect_sec
= symbol
.n_scnum
;
2262 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2264 if (highval
> pst
->raw_text_high ())
2265 pst
->set_text_high (highval
);
2266 if (!pst
->text_low_valid
2267 || symbol
.n_value
< pst
->raw_text_low ())
2268 pst
->set_text_low (symbol
.n_value
);
2270 misc_func_recorded
= 0;
2275 /* Data variables are recorded in the minimal symbol
2276 table, except for section symbols. */
2277 if (*namestring
!= '.')
2278 record_minimal_symbol
2279 (reader
, namestring
, symbol
.n_value
,
2280 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2281 symbol
.n_scnum
, objfile
);
2286 warning (_("More than one XMC_TC0 symbol found."));
2287 toc_offset
= symbol
.n_value
;
2289 /* Make TOC offset relative to start address of
2291 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2293 toc_offset
-= bfd_section_vma (bfd_sect
);
2297 /* These symbols tell us where the TOC entry for a
2298 variable is, not the variable itself. */
2307 switch (csect_aux
.x_csect
.x_smclas
)
2310 /* A function entry point. */
2312 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2313 first_fun_line_offset
=
2314 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2316 record_minimal_symbol
2317 (reader
, namestring
, symbol
.n_value
,
2318 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2319 symbol
.n_scnum
, objfile
);
2320 misc_func_recorded
= 1;
2324 /* shared library function trampoline code entry
2327 /* record trampoline code entries as
2328 mst_solib_trampoline symbol. When we lookup mst
2329 symbols, we will choose mst_text over
2330 mst_solib_trampoline. */
2331 record_minimal_symbol
2332 (reader
, namestring
, symbol
.n_value
,
2333 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2334 misc_func_recorded
= 1;
2338 /* The symbols often have the same names as
2339 debug symbols for functions, and confuse
2345 /* xlc puts each variable in a separate csect,
2346 so we get an XTY_SD for each variable. But
2347 gcc puts several variables in a csect, so
2348 that each variable only gets an XTY_LD. We
2349 still need to record them. This will
2350 typically be XMC_RW; I suspect XMC_RO and
2351 XMC_BS might be possible too. */
2352 if (*namestring
!= '.')
2353 record_minimal_symbol
2354 (reader
, namestring
, symbol
.n_value
,
2355 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2356 symbol
.n_scnum
, objfile
);
2362 switch (csect_aux
.x_csect
.x_smclas
)
2366 /* Common 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_bss
: mst_bss
,
2372 symbol
.n_scnum
, objfile
);
2384 unsigned int symnum_before
;
2386 symnum_before
= ssymnum
;
2387 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2390 /* See if the last csect needs to be recorded. */
2392 if (last_csect_name
&& !misc_func_recorded
)
2394 /* If no misc. function recorded in the last seen csect, enter
2395 it as a function. This will take care of functions like
2396 strcmp() compiled by xlc. */
2398 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2399 mst_text
, last_csect_sec
, objfile
);
2400 misc_func_recorded
= 1;
2405 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2406 includes_used
, symnum_before
,
2407 dependency_list
, dependencies_used
,
2410 dependencies_used
= 0;
2412 first_fun_line_offset
= 0;
2414 /* XCOFF, according to the AIX 3.2 documentation, puts the
2415 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2416 do things the standard COFF way and put it in the auxent.
2417 We use the auxent if the symbol is ".file" and an auxent
2418 exists, otherwise use the symbol itself. */
2419 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2421 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2424 filestring
= namestring
;
2426 pst
= xcoff_start_psymtab (objfile
,
2429 last_csect_name
= NULL
;
2435 complaint (_("Storage class %d not recognized during scan"),
2441 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2442 to handle only the C_FUN and C_EXT. */
2456 /* C_EINCL means we are switching back to the main file. But there
2457 is no reason to care; the only thing we want to know about
2458 includes is the names of all the included (.h) files. */
2463 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2467 /* I don't think the name of the common block (as opposed to the
2468 variables within it) is something which is user visible
2476 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2477 so C_LSYM would appear to be only for locals. */
2483 /* We probably could save a few instructions by assuming that
2484 C_LSYM, C_PSYM, etc., never have auxents. */
2485 int naux1
= symbol
.n_numaux
+ 1;
2488 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2494 /* Mark down an include file in the current psymtab. */
2495 enum language tmp_language
;
2497 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2500 tmp_language
= deduce_language_from_filename (namestring
);
2502 /* Only change the psymtab's language if we've learned
2503 something useful (eg. tmp_language is not language_unknown).
2504 In addition, to match what start_subfile does, never change
2506 if (tmp_language
!= language_unknown
2507 && (tmp_language
!= language_c
2508 || psymtab_language
!= language_cplus
))
2509 psymtab_language
= tmp_language
;
2511 /* In C++, one may expect the same filename to come round many
2512 times, when code is coming alternately from the main file
2513 and from inline functions in other files. So I check to see
2514 if this is a file we've seen before -- either the main
2515 source file, or a previously included file.
2517 This seems to be a lot of time to be spending on N_SOL, but
2518 things like "break c-exp.y:435" need to work (I
2519 suppose the psymtab_include_list could be hashed or put
2520 in a binary tree, if profiling shows this is a major hog). */
2521 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2527 for (i
= 0; i
< includes_used
; i
++)
2528 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2536 psymtab_include_list
[includes_used
++] = namestring
;
2537 if (includes_used
>= includes_allocated
)
2539 const char **orig
= psymtab_include_list
;
2541 psymtab_include_list
= (const char **)
2542 alloca ((includes_allocated
*= 2) *
2543 sizeof (const char *));
2544 memcpy (psymtab_include_list
, orig
,
2545 includes_used
* sizeof (const char *));
2550 /* The value of the C_FUN is not the address of the function (it
2551 appears to be the address before linking), but as long as it
2552 is smaller than the actual address, then find_pc_partial_function
2553 will use the minimal symbols instead. I hope. */
2562 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2565 p
= strchr (namestring
, ':');
2567 continue; /* Not a debugging symbol. */
2569 /* Main processing section for debugging symbols which
2570 the initial read through the symbol tables needs to worry
2571 about. If we reach this point, the symbol which we are
2572 considering is definitely one we are interested in.
2573 p must also contain the (valid) index into the namestring
2574 which indicates the debugging type symbol. */
2579 add_psymbol_to_list (gdb::string_view (namestring
,
2581 true, VAR_DOMAIN
, LOC_STATIC
,
2582 SECT_OFF_DATA (objfile
),
2583 psymbol_placement::STATIC
,
2585 psymtab_language
, objfile
);
2589 /* The addresses in these entries are reported to be
2590 wrong. See the code that reads 'G's for symtabs. */
2591 add_psymbol_to_list (gdb::string_view (namestring
,
2593 true, VAR_DOMAIN
, LOC_STATIC
,
2594 SECT_OFF_DATA (objfile
),
2595 psymbol_placement::GLOBAL
,
2597 psymtab_language
, objfile
);
2601 /* When a 'T' entry is defining an anonymous enum, it
2602 may have a name which is the empty string, or a
2603 single space. Since they're not really defining a
2604 symbol, those shouldn't go in the partial symbol
2605 table. We do pick up the elements of such enums at
2606 'check_enum:', below. */
2607 if (p
>= namestring
+ 2
2608 || (p
== namestring
+ 1
2609 && namestring
[0] != ' '))
2611 add_psymbol_to_list (gdb::string_view (namestring
,
2613 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2614 psymbol_placement::STATIC
,
2615 0, psymtab_language
, objfile
);
2618 /* Also a typedef with the same name. */
2619 add_psymbol_to_list (gdb::string_view (namestring
,
2621 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2622 psymbol_placement::STATIC
,
2623 0, psymtab_language
, objfile
);
2630 if (p
!= namestring
) /* a name is there, not just :T... */
2632 add_psymbol_to_list (gdb::string_view (namestring
,
2634 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2635 psymbol_placement::STATIC
,
2636 0, psymtab_language
, objfile
);
2639 /* If this is an enumerated type, we need to
2640 add all the enum constants to the partial symbol
2641 table. This does not cover enums without names, e.g.
2642 "enum {a, b} c;" in C, but fortunately those are
2643 rare. There is no way for GDB to find those from the
2644 enum type without spending too much time on it. Thus
2645 to solve this problem, the compiler needs to put out the
2646 enum in a nameless type. GCC2 does this. */
2648 /* We are looking for something of the form
2649 <name> ":" ("t" | "T") [<number> "="] "e"
2650 {<constant> ":" <value> ","} ";". */
2652 /* Skip over the colon and the 't' or 'T'. */
2654 /* This type may be given a number. Also, numbers can come
2655 in pairs like (0,26). Skip over it. */
2656 while ((*p
>= '0' && *p
<= '9')
2657 || *p
== '(' || *p
== ',' || *p
== ')'
2663 /* The aix4 compiler emits extra crud before the
2667 /* Skip over the type (?). */
2671 /* Skip over the colon. */
2675 /* We have found an enumerated type. */
2676 /* According to comments in read_enum_type
2677 a comma could end it instead of a semicolon.
2678 I don't know where that happens.
2680 while (*p
&& *p
!= ';' && *p
!= ',')
2684 /* Check for and handle cretinous dbx symbol name
2686 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2687 p
= next_symbol_text (objfile
);
2689 /* Point to the character after the name
2690 of the enum constant. */
2691 for (q
= p
; *q
&& *q
!= ':'; q
++)
2693 /* Note that the value doesn't matter for
2694 enum constants in psymtabs, just in symtabs. */
2695 add_psymbol_to_list (gdb::string_view (p
, q
- p
), true,
2696 VAR_DOMAIN
, LOC_CONST
, -1,
2697 psymbol_placement::STATIC
,
2698 0, psymtab_language
, objfile
);
2699 /* Point past the name. */
2701 /* Skip over the value. */
2702 while (*p
&& *p
!= ',')
2704 /* Advance past the comma. */
2712 /* Constant, e.g. from "const" in Pascal. */
2713 add_psymbol_to_list (gdb::string_view (namestring
,
2715 true, VAR_DOMAIN
, LOC_CONST
, -1,
2716 psymbol_placement::STATIC
,
2717 0, psymtab_language
, objfile
);
2723 int name_len
= p
- namestring
;
2724 char *name
= (char *) xmalloc (name_len
+ 1);
2726 memcpy (name
, namestring
, name_len
);
2727 name
[name_len
] = '\0';
2728 function_outside_compilation_unit_complaint (name
);
2731 add_psymbol_to_list (gdb::string_view (namestring
,
2733 true, VAR_DOMAIN
, LOC_BLOCK
,
2734 SECT_OFF_TEXT (objfile
),
2735 psymbol_placement::STATIC
,
2737 psymtab_language
, objfile
);
2740 /* Global functions were ignored here, but now they
2741 are put into the global psymtab like one would expect.
2742 They're also in the minimal symbol table. */
2746 int name_len
= p
- namestring
;
2747 char *name
= (char *) xmalloc (name_len
+ 1);
2749 memcpy (name
, namestring
, name_len
);
2750 name
[name_len
] = '\0';
2751 function_outside_compilation_unit_complaint (name
);
2755 /* We need only the minimal symbols for these
2756 loader-generated definitions. Keeping the global
2757 symbols leads to "in psymbols but not in symbols"
2759 if (startswith (namestring
, "@FIX"))
2762 add_psymbol_to_list (gdb::string_view (namestring
,
2764 true, VAR_DOMAIN
, LOC_BLOCK
,
2765 SECT_OFF_TEXT (objfile
),
2766 psymbol_placement::GLOBAL
,
2768 psymtab_language
, objfile
);
2771 /* Two things show up here (hopefully); static symbols of
2772 local scope (static used inside braces) or extensions
2773 of structure symbols. We can ignore both. */
2787 case '#': /* For symbol identification (used in
2792 /* It is a C++ nested symbol. We don't need to record it
2793 (I don't think); if we try to look up foo::bar::baz,
2794 then symbols for the symtab containing foo should get
2795 read in, I think. */
2796 /* Someone says sun cc puts out symbols like
2797 /foo/baz/maclib::/usr/local/bin/maclib,
2798 which would get here with a symbol type of ':'. */
2802 /* Unexpected symbol descriptor. The second and
2803 subsequent stabs of a continued stab can show up
2804 here. The question is whether they ever can mimic
2805 a normal stab--it would be nice if not, since we
2806 certainly don't want to spend the time searching to
2807 the end of every string looking for a
2810 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2812 /* Ignore it; perhaps it is an extension that we don't
2822 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2823 ssymnum
, dependency_list
,
2824 dependencies_used
, textlow_not_set
);
2827 /* Record the toc offset value of this symbol table into objfile
2828 structure. If no XMC_TC0 is found, toc_offset should be zero.
2829 Another place to obtain this information would be file auxiliary
2832 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2835 /* Return the toc offset value for a given objfile. */
2838 xcoff_get_toc_offset (struct objfile
*objfile
)
2841 return XCOFF_DATA (objfile
)->toc_offset
;
2845 /* Scan and build partial symbols for a symbol file.
2846 We have been initialized by a call to dbx_symfile_init, which
2847 put all the relevant info into a "struct dbx_symfile_info",
2848 hung off the objfile structure.
2850 SECTION_OFFSETS contains offsets relative to which the symbols in the
2851 various sections are (depending where the sections were actually
2855 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2859 int num_symbols
; /* # of symbols */
2860 file_ptr symtab_offset
; /* symbol table and */
2861 file_ptr stringtab_offset
; /* string table file offsets */
2862 struct xcoff_symfile_info
*info
;
2866 info
= XCOFF_DATA (objfile
);
2867 symfile_bfd
= abfd
= objfile
->obfd
;
2868 name
= objfile_name (objfile
);
2870 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2871 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2872 stringtab_offset
= symtab_offset
+
2873 num_symbols
* coff_data (abfd
)->local_symesz
;
2875 info
->min_lineno_offset
= 0;
2876 info
->max_lineno_offset
= 0;
2877 bfd_map_over_sections (abfd
, find_linenos
, info
);
2879 if (num_symbols
> 0)
2881 /* Read the string table. */
2882 init_stringtab (abfd
, stringtab_offset
, objfile
);
2884 /* Read the .debug section, if present and if we're not ignoring
2886 if (!(objfile
->flags
& OBJF_READNEVER
))
2888 struct bfd_section
*secp
;
2889 bfd_size_type length
;
2890 bfd_byte
*debugsec
= NULL
;
2892 secp
= bfd_get_section_by_name (abfd
, ".debug");
2895 length
= bfd_section_size (secp
);
2899 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2902 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2904 error (_("Error reading .debug section of `%s': %s"),
2905 name
, bfd_errmsg (bfd_get_error ()));
2909 info
->debugsec
= (char *) debugsec
;
2913 /* Read the symbols. We keep them in core because we will want to
2914 access them randomly in read_symbol*. */
2915 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2917 error (_("Error reading symbols from %s: %s"),
2918 name
, bfd_errmsg (bfd_get_error ()));
2919 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2920 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2921 info
->symtbl_num_syms
= num_symbols
;
2923 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2925 perror_with_name (_("reading symbol table"));
2927 /* I'm not sure how how good num_symbols is; the rule of thumb in
2928 init_psymbol_list was developed for a.out. On the one hand,
2929 num_symbols includes auxents. On the other hand, it doesn't
2931 init_psymbol_list (objfile
, num_symbols
);
2933 scoped_free_pendings free_pending
;
2934 minimal_symbol_reader
reader (objfile
);
2936 /* Now that the symbol table data of the executable file are all in core,
2937 process them and define symbols accordingly. */
2939 scan_xcoff_symtab (reader
, objfile
);
2941 /* Install any minimal symbols that have been collected as the current
2942 minimal symbols for this objfile. */
2946 /* DWARF2 sections. */
2948 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2949 dwarf2_build_psymtabs (objfile
);
2951 dwarf2_build_frame_info (objfile
);
2955 xcoff_symfile_offsets (struct objfile
*objfile
,
2956 const section_addr_info
&addrs
)
2958 const char *first_section_name
;
2960 default_symfile_offsets (objfile
, addrs
);
2962 /* Oneof the weird side-effects of default_symfile_offsets is that
2963 it sometimes sets some section indices to zero for sections that,
2964 in fact do not exist. See the body of default_symfile_offsets
2965 for more info on when that happens. Undo that, as this then allows
2966 us to test whether the associated section exists or not, and then
2967 access it quickly (without searching it again). */
2969 if (objfile
->section_offsets
.empty ())
2970 return; /* Is that even possible? Better safe than sorry. */
2972 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2974 if (objfile
->sect_index_text
== 0
2975 && strcmp (first_section_name
, ".text") != 0)
2976 objfile
->sect_index_text
= -1;
2978 if (objfile
->sect_index_data
== 0
2979 && strcmp (first_section_name
, ".data") != 0)
2980 objfile
->sect_index_data
= -1;
2982 if (objfile
->sect_index_bss
== 0
2983 && strcmp (first_section_name
, ".bss") != 0)
2984 objfile
->sect_index_bss
= -1;
2986 if (objfile
->sect_index_rodata
== 0
2987 && strcmp (first_section_name
, ".rodata") != 0)
2988 objfile
->sect_index_rodata
= -1;
2991 /* Register our ability to parse symbols for xcoff BFD files. */
2993 static const struct sym_fns xcoff_sym_fns
=
2996 /* It is possible that coff and xcoff should be merged as
2997 they do have fundamental similarities (for example, the extra storage
2998 classes used for stabs could presumably be recognized in any COFF file).
2999 However, in addition to obvious things like all the csect hair, there are
3000 some subtler differences between xcoffread.c and coffread.c, notably
3001 the fact that coffread.c has no need to read in all the symbols, but
3002 xcoffread.c reads all the symbols and does in fact randomly access them
3003 (in C_BSTAT and line number processing). */
3005 xcoff_new_init
, /* init anything gbl to entire symtab */
3006 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3007 xcoff_initial_scan
, /* read a symbol file into symtab */
3008 NULL
, /* sym_read_psymbols */
3009 xcoff_symfile_finish
, /* finished with file, cleanup */
3010 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3011 default_symfile_segments
, /* Get segment information from a file. */
3012 aix_process_linenos
,
3013 default_symfile_relocate
, /* Relocate a debug section. */
3014 NULL
, /* sym_probe_fns */
3018 /* Same as xcoff_get_n_import_files, but for core files. */
3021 xcoff_get_core_n_import_files (bfd
*abfd
)
3023 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3025 file_ptr offset
= 0;
3029 return -1; /* Not a core file. */
3031 for (offset
= 0; offset
< bfd_section_size (sect
);)
3037 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3039 next
= bfd_get_32 (abfd
, buf
);
3041 break; /* This is the last entry. */
3045 /* Return the number of entries, excluding the first one, which is
3046 the path to the executable that produced this core file. */
3047 return n_entries
- 1;
3050 /* Return the number of import files (shared libraries) that the given
3051 BFD depends on. Return -1 if this number could not be computed. */
3054 xcoff_get_n_import_files (bfd
*abfd
)
3056 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3060 /* If the ".loader" section does not exist, the objfile is probably
3061 not an executable. Might be a core file... */
3063 return xcoff_get_core_n_import_files (abfd
);
3065 /* The number of entries in the Import Files Table is stored in
3066 field l_nimpid. This field is always at offset 16, and is
3067 always 4 bytes long. Read those 4 bytes. */
3069 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3071 l_nimpid
= bfd_get_32 (abfd
, buf
);
3073 /* By convention, the first entry is the default LIBPATH value
3074 to be used by the system loader, so it does not count towards
3075 the number of import files. */
3076 return l_nimpid
- 1;
3079 void _initialize_xcoffread ();
3081 _initialize_xcoffread ()
3083 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);