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
= get_objfile_arch (objfile
);
833 unsigned int curoffset
;
836 struct internal_lineno int_lnno
;
837 unsigned int limit_offset
;
841 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
843 curoffset
= beginoffset
;
844 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
848 if (endoffset
>= limit_offset
)
850 complaint (_("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 SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1525 (SYMBOL2) = new (&objfile->objfile_obstack) symbol (); \
1526 *(SYMBOL2) = *(SYMBOL1);
1529 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1530 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1534 /* process one xcoff symbol. */
1536 static struct symbol
*
1537 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1539 struct symbol onesymbol
;
1540 struct symbol
*sym
= &onesymbol
;
1541 struct symbol
*sym2
= NULL
;
1547 if (cs
->c_secnum
< 0)
1549 /* The value is a register number, offset within a frame, etc.,
1550 and does not get relocated. */
1556 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1557 off
= objfile
->section_offsets
[sec
];
1564 initialize_objfile_symbol (sym
);
1566 /* default assumptions */
1567 SET_SYMBOL_VALUE_ADDRESS (sym
, cs
->c_value
+ off
);
1568 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1569 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1571 if (ISFCN (cs
->c_type
))
1573 /* At this point, we don't know the type of the function. This
1574 will be patched with the type from its stab entry later on in
1575 patch_block_stabs (), unless the file was compiled without -g. */
1577 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1578 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1580 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1581 SYMBOL_DUP (sym
, sym2
);
1583 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1584 add_symbol_to_list (sym2
, get_global_symbols ());
1585 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1586 add_symbol_to_list (sym2
, get_file_symbols ());
1590 /* In case we can't figure out the type, provide default. */
1591 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1593 switch (cs
->c_sclass
)
1596 /* The values of functions and global symbols are now resolved
1597 via the global_sym_chain in stabsread.c. */
1599 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1600 add_stab_to_list (name
, &global_stabs
);
1602 add_stab_to_list (name
, &file_stabs
);
1606 add_stab_to_list (name
, &global_stabs
);
1611 common_block_start (cs
->c_name
, objfile
);
1615 common_block_end (objfile
);
1619 complaint (_("Unexpected storage class: %d"),
1632 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1635 SYMBOL_SECTION (sym
) = sec
;
1642 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1643 all statics and we need to distinguish file-scope versus
1644 function-scope using within_function. We do this by
1645 changing the string we pass to define_symbol to use 'S'
1646 where we need to, which is not necessarily super-clean,
1647 but seems workable enough. */
1652 pp
= strchr (name
, ':');
1657 if (*pp
== 'V' && !within_function
)
1659 sym
= define_symbol ((cs
->c_value
1660 + objfile
->section_offsets
[static_block_section
]),
1661 cs
->c_name
, 0, 0, objfile
);
1664 SET_SYMBOL_VALUE_ADDRESS (sym
,
1665 SYMBOL_VALUE_ADDRESS (sym
)
1666 + static_block_base
);
1667 SYMBOL_SECTION (sym
) = static_block_section
;
1676 /* Extract the file name from the aux entry of a C_FILE symbol.
1677 Result is in static storage and is only good for temporary use. */
1680 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1682 static char buffer
[BUFSIZ
];
1684 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1685 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1686 + aux_entry
->x_file
.x_n
.x_offset
));
1689 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1690 buffer
[FILNMLEN
] = '\0';
1695 /* Set *SYMBOL to symbol number symno in symtbl. */
1697 read_symbol (struct internal_syment
*symbol
, int symno
)
1699 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1700 int nsyms
= xcoff
->symtbl_num_syms
;
1701 char *stbl
= xcoff
->symtbl
;
1703 if (symno
< 0 || symno
>= nsyms
)
1705 complaint (_("Invalid symbol offset"));
1706 symbol
->n_value
= 0;
1707 symbol
->n_scnum
= -1;
1710 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1711 stbl
+ (symno
* local_symesz
),
1715 /* Get value corresponding to symbol number symno in symtbl. */
1718 read_symbol_nvalue (int symno
)
1720 struct internal_syment symbol
[1];
1722 read_symbol (symbol
, symno
);
1723 return symbol
->n_value
;
1727 /* Find the address of the function corresponding to symno, where
1728 symno is the symbol pointed to by the linetable. */
1731 read_symbol_lineno (int symno
)
1733 struct objfile
*objfile
= this_symtab_objfile
;
1734 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1736 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1737 int nsyms
= info
->symtbl_num_syms
;
1738 char *stbl
= info
->symtbl
;
1739 char *strtbl
= info
->strtbl
;
1741 struct internal_syment symbol
[1];
1742 union internal_auxent main_aux
[1];
1746 bf_notfound_complaint ();
1750 /* Note that just searching for a short distance (e.g. 50 symbols)
1751 is not enough, at least in the following case.
1754 [many .stabx entries]
1755 [a few functions, referring to foo]
1759 What happens here is that the assembler moves the .stabx entries
1760 to right before the ".bf" for foo, but the symbol for "foo" is before
1761 all the stabx entries. See PR gdb/2222. */
1763 /* Maintaining a table of .bf entries might be preferable to this search.
1764 If I understand things correctly it would need to be done only for
1765 the duration of a single psymtab to symtab conversion. */
1766 while (symno
< nsyms
)
1768 bfd_coff_swap_sym_in (symfile_bfd
,
1769 stbl
+ (symno
* local_symesz
), symbol
);
1770 if (symbol
->n_sclass
== C_FCN
)
1772 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1774 if (strcmp (name
, ".bf") == 0)
1777 symno
+= symbol
->n_numaux
+ 1;
1780 bf_notfound_complaint ();
1784 /* Take aux entry and return its lineno. */
1786 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1787 symbol
->n_type
, symbol
->n_sclass
,
1788 0, symbol
->n_numaux
, main_aux
);
1790 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1793 /* Support for line number handling. */
1795 /* This function is called for every section; it finds the outer limits
1796 * of the line table (minimum and maximum file offset) so that the
1797 * mainline code can read the whole thing for efficiency.
1800 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1802 struct xcoff_symfile_info
*info
;
1804 file_ptr offset
, maxoff
;
1806 count
= asect
->lineno_count
;
1808 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1811 size
= count
* coff_data (abfd
)->local_linesz
;
1812 info
= (struct xcoff_symfile_info
*) vpinfo
;
1813 offset
= asect
->line_filepos
;
1814 maxoff
= offset
+ size
;
1816 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1817 info
->min_lineno_offset
= offset
;
1819 if (maxoff
> info
->max_lineno_offset
)
1820 info
->max_lineno_offset
= maxoff
;
1824 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1826 gdb_assert (!pst
->readin
);
1828 /* Read in all partial symtabs on which this one is dependent. */
1829 pst
->expand_dependencies (objfile
);
1831 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1833 /* Init stuff necessary for reading in symbols. */
1836 scoped_free_pendings free_pending
;
1837 read_xcoff_symtab (objfile
, pst
);
1843 /* Read in all of the symbols for a given psymtab for real.
1844 Be verbose about it if the user wants that. SELF is not NULL. */
1847 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1849 gdb_assert (!self
->readin
);
1851 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1852 || self
->number_of_dependencies
)
1854 next_symbol_text_func
= xcoff_next_symbol_text
;
1856 self
->expand_psymtab (objfile
);
1858 /* Match with global symbols. This only needs to be done once,
1859 after all of the symtabs and dependencies have been read in. */
1860 scan_file_globals (objfile
);
1865 xcoff_new_init (struct objfile
*objfile
)
1867 stabsread_new_init ();
1870 /* Do initialization in preparation for reading symbols from OBJFILE.
1872 We will only be called if this is an XCOFF or XCOFF-like file.
1873 BFD handles figuring out the format of the file, and code in symfile.c
1874 uses BFD's determination to vector to us. */
1877 xcoff_symfile_init (struct objfile
*objfile
)
1879 /* Allocate struct to keep track of the symfile. */
1880 xcoff_objfile_data_key
.emplace (objfile
);
1882 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1883 find this causes a significant slowdown in gdb then we could
1884 set it in the debug symbol readers only when necessary. */
1885 objfile
->flags
|= OBJF_REORDERED
;
1888 /* Perform any local cleanups required when we are done with a particular
1889 objfile. I.E, we are in the process of discarding all symbol information
1890 for an objfile, freeing up all memory held for it, and unlinking the
1891 objfile struct from the global list of known objfiles. */
1894 xcoff_symfile_finish (struct objfile
*objfile
)
1896 /* Start with a fresh include table for the next objfile. */
1902 inclIndx
= inclLength
= inclDepth
= 0;
1907 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1911 unsigned char lengthbuf
[4];
1913 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1915 xcoff
->strtbl
= NULL
;
1917 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1918 error (_("cannot seek to string table in %s: %s"),
1919 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1921 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1922 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1924 /* If no string table is needed, then the file may end immediately
1925 after the symbols. Just return with `strtbl' set to NULL. */
1927 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1930 /* Allocate string table from objfile_obstack. We will need this table
1931 as long as we have its symbol table around. */
1933 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1934 xcoff
->strtbl
= strtbl
;
1936 /* Copy length buffer, the first byte is usually zero and is
1937 used for stabs with a name length of zero. */
1938 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1939 if (length
== sizeof lengthbuf
)
1942 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1944 if (val
!= length
- sizeof lengthbuf
)
1945 error (_("cannot read string table from %s: %s"),
1946 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1947 if (strtbl
[length
- 1] != '\0')
1948 error (_("bad symbol file: string table "
1949 "does not end with null character"));
1954 /* If we have not yet seen a function for this psymtab, this is 0. If we
1955 have seen one, it is the offset in the line numbers of the line numbers
1957 static unsigned int first_fun_line_offset
;
1959 /* Allocate and partially fill a partial symtab. It will be
1960 completely filled at the end of the symbol list.
1962 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1963 is the address relative to which its symbols are (incremental) or 0
1966 static legacy_psymtab
*
1967 xcoff_start_psymtab (struct objfile
*objfile
,
1968 const char *filename
, int first_symnum
)
1970 /* We fill in textlow later. */
1971 legacy_psymtab
*result
= new legacy_psymtab (filename
, objfile
, 0);
1973 result
->read_symtab_private
=
1974 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1975 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1976 result
->legacy_read_symtab
= xcoff_read_symtab
;
1977 result
->legacy_expand_psymtab
= xcoff_expand_psymtab
;
1979 /* Deduce the source language from the filename for this psymtab. */
1980 psymtab_language
= deduce_language_from_filename (filename
);
1985 /* Close off the current usage of PST.
1986 Returns PST, or NULL if the partial symtab was empty and thrown away.
1988 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1990 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1991 are the information for includes and dependencies. */
1993 static legacy_psymtab
*
1994 xcoff_end_psymtab (struct objfile
*objfile
, legacy_psymtab
*pst
,
1995 const char **include_list
, int num_includes
,
1996 int capping_symbol_number
,
1997 legacy_psymtab
**dependency_list
,
1998 int number_dependencies
, int textlow_not_set
)
2002 if (capping_symbol_number
!= -1)
2003 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2004 capping_symbol_number
2005 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2006 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2007 first_fun_line_offset
;
2008 first_fun_line_offset
= 0;
2010 end_psymtab_common (objfile
, pst
);
2012 pst
->number_of_dependencies
= number_dependencies
;
2013 if (number_dependencies
)
2016 = objfile
->partial_symtabs
->allocate_dependencies (number_dependencies
);
2017 memcpy (pst
->dependencies
, dependency_list
,
2018 number_dependencies
* sizeof (legacy_psymtab
*));
2021 pst
->dependencies
= 0;
2023 for (i
= 0; i
< num_includes
; i
++)
2025 legacy_psymtab
*subpst
=
2026 new legacy_psymtab (include_list
[i
], objfile
);
2028 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, symloc
);
2029 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2030 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2032 /* We could save slight bits of space by only making one of these,
2033 shared by the entire set of include files. FIXME-someday. */
2034 subpst
->dependencies
=
2035 objfile
->partial_symtabs
->allocate_dependencies (1);
2036 subpst
->dependencies
[0] = pst
;
2037 subpst
->number_of_dependencies
= 1;
2039 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
2040 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
2043 if (num_includes
== 0
2044 && number_dependencies
== 0
2045 && pst
->n_global_syms
== 0
2046 && pst
->n_static_syms
== 0)
2048 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2049 it is on the obstack, but we can forget to chain it on the list. */
2050 /* Empty psymtabs happen as a result of header files which don't have
2051 any symbols in them. There can be a lot of them. */
2053 objfile
->partial_symtabs
->discard_psymtab (pst
);
2055 /* Indicate that psymtab was thrown away. */
2061 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2062 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2063 the symbol and its auxents. */
2066 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2067 const char **name
, char **raw
, unsigned int *symnump
,
2068 struct objfile
*objfile
)
2070 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2071 if (symbol
->n_zeroes
)
2073 /* If it's exactly E_SYMNMLEN characters long it isn't
2075 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2077 /* FIXME: wastes memory for symbols which we don't end up putting
2078 into the minimal symbols. */
2081 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2083 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2084 p
[E_SYMNMLEN
] = '\0';
2088 /* Point to the unswapped name as that persists as long as the
2090 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2092 else if (symbol
->n_sclass
& 0x80)
2094 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2098 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2101 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2102 if (symbol
->n_numaux
> 0)
2104 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2105 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2107 *symnump
+= symbol
->n_numaux
;
2108 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2113 function_outside_compilation_unit_complaint (const char *arg1
)
2115 complaint (_("function `%s' appears to be defined "
2116 "outside of all compilation units"),
2121 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2122 struct objfile
*objfile
)
2124 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2125 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2126 const char *filestring
= NULL
;
2128 const char *namestring
;
2133 /* Current partial symtab */
2134 legacy_psymtab
*pst
;
2136 /* List of current psymtab's include files. */
2137 const char **psymtab_include_list
;
2138 int includes_allocated
;
2141 /* Index within current psymtab dependency list. */
2142 legacy_psymtab
**dependency_list
;
2143 int dependencies_used
, dependencies_allocated
;
2146 struct internal_syment symbol
;
2147 union internal_auxent main_aux
[5];
2148 unsigned int ssymnum
;
2150 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2151 CORE_ADDR last_csect_val
= 0;
2152 int last_csect_sec
= 0;
2153 int misc_func_recorded
= 0; /* true if any misc. function. */
2154 int textlow_not_set
= 1;
2156 pst
= (legacy_psymtab
*) 0;
2158 includes_allocated
= 30;
2160 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2161 sizeof (const char *));
2163 dependencies_allocated
= 30;
2164 dependencies_used
= 0;
2166 (legacy_psymtab
**) alloca (dependencies_allocated
*
2167 sizeof (legacy_psymtab
*));
2169 set_last_source_file (NULL
);
2171 abfd
= objfile
->obfd
;
2172 next_symbol_text_func
= xcoff_next_symbol_text
;
2174 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2175 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2177 while (ssymnum
< nsyms
)
2183 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2184 sclass
= symbol
.n_sclass
;
2192 /* The CSECT auxent--always the last auxent. */
2193 union internal_auxent csect_aux
;
2194 unsigned int symnum_before
= ssymnum
;
2196 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2198 if (symbol
.n_numaux
> 1)
2200 bfd_coff_swap_aux_in
2202 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2205 symbol
.n_numaux
- 1,
2210 csect_aux
= main_aux
[0];
2212 /* If symbol name starts with ".$" or "$", ignore it. */
2213 if (namestring
[0] == '$'
2214 || (namestring
[0] == '.' && namestring
[1] == '$'))
2217 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2220 switch (csect_aux
.x_csect
.x_smclas
)
2223 if (last_csect_name
)
2225 /* If no misc. function recorded in the last
2226 seen csect, enter it as a function. This
2227 will take care of functions like strcmp()
2230 if (!misc_func_recorded
)
2232 record_minimal_symbol
2233 (reader
, last_csect_name
, last_csect_val
,
2234 mst_text
, last_csect_sec
, objfile
);
2235 misc_func_recorded
= 1;
2240 /* We have to allocate one psymtab for
2241 each program csect, because their text
2242 sections need not be adjacent. */
2244 (objfile
, pst
, psymtab_include_list
,
2245 includes_used
, symnum_before
, dependency_list
,
2246 dependencies_used
, textlow_not_set
);
2248 dependencies_used
= 0;
2249 /* Give all psymtabs for this source file the same
2251 pst
= xcoff_start_psymtab
2257 /* Activate the misc_func_recorded mechanism for
2258 compiler- and linker-generated CSECTs like ".strcmp"
2260 if (namestring
&& (namestring
[0] == '.'
2261 || namestring
[0] == '@'))
2263 last_csect_name
= namestring
;
2264 last_csect_val
= symbol
.n_value
;
2265 last_csect_sec
= symbol
.n_scnum
;
2270 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2272 if (highval
> pst
->raw_text_high ())
2273 pst
->set_text_high (highval
);
2274 if (!pst
->text_low_valid
2275 || symbol
.n_value
< pst
->raw_text_low ())
2276 pst
->set_text_low (symbol
.n_value
);
2278 misc_func_recorded
= 0;
2283 /* Data variables are recorded in the minimal symbol
2284 table, except for section symbols. */
2285 if (*namestring
!= '.')
2286 record_minimal_symbol
2287 (reader
, namestring
, symbol
.n_value
,
2288 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2289 symbol
.n_scnum
, objfile
);
2294 warning (_("More than one XMC_TC0 symbol found."));
2295 toc_offset
= symbol
.n_value
;
2297 /* Make TOC offset relative to start address of
2299 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2301 toc_offset
-= bfd_section_vma (bfd_sect
);
2305 /* These symbols tell us where the TOC entry for a
2306 variable is, not the variable itself. */
2315 switch (csect_aux
.x_csect
.x_smclas
)
2318 /* A function entry point. */
2320 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2321 first_fun_line_offset
=
2322 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2324 record_minimal_symbol
2325 (reader
, namestring
, symbol
.n_value
,
2326 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2327 symbol
.n_scnum
, objfile
);
2328 misc_func_recorded
= 1;
2332 /* shared library function trampoline code entry
2335 /* record trampoline code entries as
2336 mst_solib_trampoline symbol. When we lookup mst
2337 symbols, we will choose mst_text over
2338 mst_solib_trampoline. */
2339 record_minimal_symbol
2340 (reader
, namestring
, symbol
.n_value
,
2341 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2342 misc_func_recorded
= 1;
2346 /* The symbols often have the same names as
2347 debug symbols for functions, and confuse
2353 /* xlc puts each variable in a separate csect,
2354 so we get an XTY_SD for each variable. But
2355 gcc puts several variables in a csect, so
2356 that each variable only gets an XTY_LD. We
2357 still need to record them. This will
2358 typically be XMC_RW; I suspect XMC_RO and
2359 XMC_BS might be possible too. */
2360 if (*namestring
!= '.')
2361 record_minimal_symbol
2362 (reader
, namestring
, symbol
.n_value
,
2363 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2364 symbol
.n_scnum
, objfile
);
2370 switch (csect_aux
.x_csect
.x_smclas
)
2374 /* Common variables are recorded in the minimal symbol
2375 table, except for section symbols. */
2376 if (*namestring
!= '.')
2377 record_minimal_symbol
2378 (reader
, namestring
, symbol
.n_value
,
2379 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2380 symbol
.n_scnum
, objfile
);
2392 unsigned int symnum_before
;
2394 symnum_before
= ssymnum
;
2395 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2398 /* See if the last csect needs to be recorded. */
2400 if (last_csect_name
&& !misc_func_recorded
)
2402 /* If no misc. function recorded in the last seen csect, enter
2403 it as a function. This will take care of functions like
2404 strcmp() compiled by xlc. */
2406 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2407 mst_text
, last_csect_sec
, objfile
);
2408 misc_func_recorded
= 1;
2413 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2414 includes_used
, symnum_before
,
2415 dependency_list
, dependencies_used
,
2418 dependencies_used
= 0;
2420 first_fun_line_offset
= 0;
2422 /* XCOFF, according to the AIX 3.2 documentation, puts the
2423 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2424 do things the standard COFF way and put it in the auxent.
2425 We use the auxent if the symbol is ".file" and an auxent
2426 exists, otherwise use the symbol itself. */
2427 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2429 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2432 filestring
= namestring
;
2434 pst
= xcoff_start_psymtab (objfile
,
2437 last_csect_name
= NULL
;
2443 complaint (_("Storage class %d not recognized during scan"),
2449 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2450 to handle only the C_FUN and C_EXT. */
2464 /* C_EINCL means we are switching back to the main file. But there
2465 is no reason to care; the only thing we want to know about
2466 includes is the names of all the included (.h) files. */
2471 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2475 /* I don't think the name of the common block (as opposed to the
2476 variables within it) is something which is user visible
2484 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2485 so C_LSYM would appear to be only for locals. */
2491 /* We probably could save a few instructions by assuming that
2492 C_LSYM, C_PSYM, etc., never have auxents. */
2493 int naux1
= symbol
.n_numaux
+ 1;
2496 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2502 /* Mark down an include file in the current psymtab. */
2503 enum language tmp_language
;
2505 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2508 tmp_language
= deduce_language_from_filename (namestring
);
2510 /* Only change the psymtab's language if we've learned
2511 something useful (eg. tmp_language is not language_unknown).
2512 In addition, to match what start_subfile does, never change
2514 if (tmp_language
!= language_unknown
2515 && (tmp_language
!= language_c
2516 || psymtab_language
!= language_cplus
))
2517 psymtab_language
= tmp_language
;
2519 /* In C++, one may expect the same filename to come round many
2520 times, when code is coming alternately from the main file
2521 and from inline functions in other files. So I check to see
2522 if this is a file we've seen before -- either the main
2523 source file, or a previously included file.
2525 This seems to be a lot of time to be spending on N_SOL, but
2526 things like "break c-exp.y:435" need to work (I
2527 suppose the psymtab_include_list could be hashed or put
2528 in a binary tree, if profiling shows this is a major hog). */
2529 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2535 for (i
= 0; i
< includes_used
; i
++)
2536 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2544 psymtab_include_list
[includes_used
++] = namestring
;
2545 if (includes_used
>= includes_allocated
)
2547 const char **orig
= psymtab_include_list
;
2549 psymtab_include_list
= (const char **)
2550 alloca ((includes_allocated
*= 2) *
2551 sizeof (const char *));
2552 memcpy (psymtab_include_list
, orig
,
2553 includes_used
* sizeof (const char *));
2558 /* The value of the C_FUN is not the address of the function (it
2559 appears to be the address before linking), but as long as it
2560 is smaller than the actual address, then find_pc_partial_function
2561 will use the minimal symbols instead. I hope. */
2570 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2573 p
= strchr (namestring
, ':');
2575 continue; /* Not a debugging symbol. */
2577 /* Main processing section for debugging symbols which
2578 the initial read through the symbol tables needs to worry
2579 about. If we reach this point, the symbol which we are
2580 considering is definitely one we are interested in.
2581 p must also contain the (valid) index into the namestring
2582 which indicates the debugging type symbol. */
2587 if (gdbarch_static_transform_name_p (gdbarch
))
2588 namestring
= gdbarch_static_transform_name
2589 (gdbarch
, namestring
);
2591 add_psymbol_to_list (gdb::string_view (namestring
,
2593 true, VAR_DOMAIN
, LOC_STATIC
,
2594 SECT_OFF_DATA (objfile
),
2595 psymbol_placement::STATIC
,
2597 psymtab_language
, objfile
);
2601 /* The addresses in these entries are reported to be
2602 wrong. See the code that reads 'G's for symtabs. */
2603 add_psymbol_to_list (gdb::string_view (namestring
,
2605 true, VAR_DOMAIN
, LOC_STATIC
,
2606 SECT_OFF_DATA (objfile
),
2607 psymbol_placement::GLOBAL
,
2609 psymtab_language
, objfile
);
2613 /* When a 'T' entry is defining an anonymous enum, it
2614 may have a name which is the empty string, or a
2615 single space. Since they're not really defining a
2616 symbol, those shouldn't go in the partial symbol
2617 table. We do pick up the elements of such enums at
2618 'check_enum:', below. */
2619 if (p
>= namestring
+ 2
2620 || (p
== namestring
+ 1
2621 && namestring
[0] != ' '))
2623 add_psymbol_to_list (gdb::string_view (namestring
,
2625 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2626 psymbol_placement::STATIC
,
2627 0, psymtab_language
, objfile
);
2630 /* Also a typedef with the same name. */
2631 add_psymbol_to_list (gdb::string_view (namestring
,
2633 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2634 psymbol_placement::STATIC
,
2635 0, psymtab_language
, objfile
);
2642 if (p
!= namestring
) /* a name is there, not just :T... */
2644 add_psymbol_to_list (gdb::string_view (namestring
,
2646 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2647 psymbol_placement::STATIC
,
2648 0, psymtab_language
, objfile
);
2651 /* If this is an enumerated type, we need to
2652 add all the enum constants to the partial symbol
2653 table. This does not cover enums without names, e.g.
2654 "enum {a, b} c;" in C, but fortunately those are
2655 rare. There is no way for GDB to find those from the
2656 enum type without spending too much time on it. Thus
2657 to solve this problem, the compiler needs to put out the
2658 enum in a nameless type. GCC2 does this. */
2660 /* We are looking for something of the form
2661 <name> ":" ("t" | "T") [<number> "="] "e"
2662 {<constant> ":" <value> ","} ";". */
2664 /* Skip over the colon and the 't' or 'T'. */
2666 /* This type may be given a number. Also, numbers can come
2667 in pairs like (0,26). Skip over it. */
2668 while ((*p
>= '0' && *p
<= '9')
2669 || *p
== '(' || *p
== ',' || *p
== ')'
2675 /* The aix4 compiler emits extra crud before the
2679 /* Skip over the type (?). */
2683 /* Skip over the colon. */
2687 /* We have found an enumerated type. */
2688 /* According to comments in read_enum_type
2689 a comma could end it instead of a semicolon.
2690 I don't know where that happens.
2692 while (*p
&& *p
!= ';' && *p
!= ',')
2696 /* Check for and handle cretinous dbx symbol name
2698 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2699 p
= next_symbol_text (objfile
);
2701 /* Point to the character after the name
2702 of the enum constant. */
2703 for (q
= p
; *q
&& *q
!= ':'; q
++)
2705 /* Note that the value doesn't matter for
2706 enum constants in psymtabs, just in symtabs. */
2707 add_psymbol_to_list (gdb::string_view (p
, q
- p
), true,
2708 VAR_DOMAIN
, LOC_CONST
, -1,
2709 psymbol_placement::STATIC
,
2710 0, psymtab_language
, objfile
);
2711 /* Point past the name. */
2713 /* Skip over the value. */
2714 while (*p
&& *p
!= ',')
2716 /* Advance past the comma. */
2724 /* Constant, e.g. from "const" in Pascal. */
2725 add_psymbol_to_list (gdb::string_view (namestring
,
2727 true, VAR_DOMAIN
, LOC_CONST
, -1,
2728 psymbol_placement::STATIC
,
2729 0, psymtab_language
, objfile
);
2735 int name_len
= p
- namestring
;
2736 char *name
= (char *) xmalloc (name_len
+ 1);
2738 memcpy (name
, namestring
, name_len
);
2739 name
[name_len
] = '\0';
2740 function_outside_compilation_unit_complaint (name
);
2743 add_psymbol_to_list (gdb::string_view (namestring
,
2745 true, VAR_DOMAIN
, LOC_BLOCK
,
2746 SECT_OFF_TEXT (objfile
),
2747 psymbol_placement::STATIC
,
2749 psymtab_language
, objfile
);
2752 /* Global functions were ignored here, but now they
2753 are put into the global psymtab like one would expect.
2754 They're also in the minimal symbol table. */
2758 int name_len
= p
- namestring
;
2759 char *name
= (char *) xmalloc (name_len
+ 1);
2761 memcpy (name
, namestring
, name_len
);
2762 name
[name_len
] = '\0';
2763 function_outside_compilation_unit_complaint (name
);
2767 /* We need only the minimal symbols for these
2768 loader-generated definitions. Keeping the global
2769 symbols leads to "in psymbols but not in symbols"
2771 if (startswith (namestring
, "@FIX"))
2774 add_psymbol_to_list (gdb::string_view (namestring
,
2776 true, VAR_DOMAIN
, LOC_BLOCK
,
2777 SECT_OFF_TEXT (objfile
),
2778 psymbol_placement::GLOBAL
,
2780 psymtab_language
, objfile
);
2783 /* Two things show up here (hopefully); static symbols of
2784 local scope (static used inside braces) or extensions
2785 of structure symbols. We can ignore both. */
2799 case '#': /* For symbol identification (used in
2804 /* It is a C++ nested symbol. We don't need to record it
2805 (I don't think); if we try to look up foo::bar::baz,
2806 then symbols for the symtab containing foo should get
2807 read in, I think. */
2808 /* Someone says sun cc puts out symbols like
2809 /foo/baz/maclib::/usr/local/bin/maclib,
2810 which would get here with a symbol type of ':'. */
2814 /* Unexpected symbol descriptor. The second and
2815 subsequent stabs of a continued stab can show up
2816 here. The question is whether they ever can mimic
2817 a normal stab--it would be nice if not, since we
2818 certainly don't want to spend the time searching to
2819 the end of every string looking for a
2822 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2824 /* Ignore it; perhaps it is an extension that we don't
2834 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2835 ssymnum
, dependency_list
,
2836 dependencies_used
, textlow_not_set
);
2839 /* Record the toc offset value of this symbol table into objfile
2840 structure. If no XMC_TC0 is found, toc_offset should be zero.
2841 Another place to obtain this information would be file auxiliary
2844 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2847 /* Return the toc offset value for a given objfile. */
2850 xcoff_get_toc_offset (struct objfile
*objfile
)
2853 return XCOFF_DATA (objfile
)->toc_offset
;
2857 /* Scan and build partial symbols for a symbol file.
2858 We have been initialized by a call to dbx_symfile_init, which
2859 put all the relevant info into a "struct dbx_symfile_info",
2860 hung off the objfile structure.
2862 SECTION_OFFSETS contains offsets relative to which the symbols in the
2863 various sections are (depending where the sections were actually
2867 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2871 int num_symbols
; /* # of symbols */
2872 file_ptr symtab_offset
; /* symbol table and */
2873 file_ptr stringtab_offset
; /* string table file offsets */
2874 struct xcoff_symfile_info
*info
;
2878 info
= XCOFF_DATA (objfile
);
2879 symfile_bfd
= abfd
= objfile
->obfd
;
2880 name
= objfile_name (objfile
);
2882 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2883 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2884 stringtab_offset
= symtab_offset
+
2885 num_symbols
* coff_data (abfd
)->local_symesz
;
2887 info
->min_lineno_offset
= 0;
2888 info
->max_lineno_offset
= 0;
2889 bfd_map_over_sections (abfd
, find_linenos
, info
);
2891 if (num_symbols
> 0)
2893 /* Read the string table. */
2894 init_stringtab (abfd
, stringtab_offset
, objfile
);
2896 /* Read the .debug section, if present and if we're not ignoring
2898 if (!(objfile
->flags
& OBJF_READNEVER
))
2900 struct bfd_section
*secp
;
2901 bfd_size_type length
;
2902 bfd_byte
*debugsec
= NULL
;
2904 secp
= bfd_get_section_by_name (abfd
, ".debug");
2907 length
= bfd_section_size (secp
);
2911 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2914 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2916 error (_("Error reading .debug section of `%s': %s"),
2917 name
, bfd_errmsg (bfd_get_error ()));
2921 info
->debugsec
= (char *) debugsec
;
2925 /* Read the symbols. We keep them in core because we will want to
2926 access them randomly in read_symbol*. */
2927 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2929 error (_("Error reading symbols from %s: %s"),
2930 name
, bfd_errmsg (bfd_get_error ()));
2931 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2932 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2933 info
->symtbl_num_syms
= num_symbols
;
2935 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2937 perror_with_name (_("reading symbol table"));
2939 /* I'm not sure how how good num_symbols is; the rule of thumb in
2940 init_psymbol_list was developed for a.out. On the one hand,
2941 num_symbols includes auxents. On the other hand, it doesn't
2943 init_psymbol_list (objfile
, num_symbols
);
2945 scoped_free_pendings free_pending
;
2946 minimal_symbol_reader
reader (objfile
);
2948 /* Now that the symbol table data of the executable file are all in core,
2949 process them and define symbols accordingly. */
2951 scan_xcoff_symtab (reader
, objfile
);
2953 /* Install any minimal symbols that have been collected as the current
2954 minimal symbols for this objfile. */
2958 /* DWARF2 sections. */
2960 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2961 dwarf2_build_psymtabs (objfile
);
2963 dwarf2_build_frame_info (objfile
);
2967 xcoff_symfile_offsets (struct objfile
*objfile
,
2968 const section_addr_info
&addrs
)
2970 const char *first_section_name
;
2972 default_symfile_offsets (objfile
, addrs
);
2974 /* Oneof the weird side-effects of default_symfile_offsets is that
2975 it sometimes sets some section indices to zero for sections that,
2976 in fact do not exist. See the body of default_symfile_offsets
2977 for more info on when that happens. Undo that, as this then allows
2978 us to test whether the associated section exists or not, and then
2979 access it quickly (without searching it again). */
2981 if (objfile
->section_offsets
.empty ())
2982 return; /* Is that even possible? Better safe than sorry. */
2984 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2986 if (objfile
->sect_index_text
== 0
2987 && strcmp (first_section_name
, ".text") != 0)
2988 objfile
->sect_index_text
= -1;
2990 if (objfile
->sect_index_data
== 0
2991 && strcmp (first_section_name
, ".data") != 0)
2992 objfile
->sect_index_data
= -1;
2994 if (objfile
->sect_index_bss
== 0
2995 && strcmp (first_section_name
, ".bss") != 0)
2996 objfile
->sect_index_bss
= -1;
2998 if (objfile
->sect_index_rodata
== 0
2999 && strcmp (first_section_name
, ".rodata") != 0)
3000 objfile
->sect_index_rodata
= -1;
3003 /* Register our ability to parse symbols for xcoff BFD files. */
3005 static const struct sym_fns xcoff_sym_fns
=
3008 /* It is possible that coff and xcoff should be merged as
3009 they do have fundamental similarities (for example, the extra storage
3010 classes used for stabs could presumably be recognized in any COFF file).
3011 However, in addition to obvious things like all the csect hair, there are
3012 some subtler differences between xcoffread.c and coffread.c, notably
3013 the fact that coffread.c has no need to read in all the symbols, but
3014 xcoffread.c reads all the symbols and does in fact randomly access them
3015 (in C_BSTAT and line number processing). */
3017 xcoff_new_init
, /* init anything gbl to entire symtab */
3018 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3019 xcoff_initial_scan
, /* read a symbol file into symtab */
3020 NULL
, /* sym_read_psymbols */
3021 xcoff_symfile_finish
, /* finished with file, cleanup */
3022 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3023 default_symfile_segments
, /* Get segment information from a file. */
3024 aix_process_linenos
,
3025 default_symfile_relocate
, /* Relocate a debug section. */
3026 NULL
, /* sym_probe_fns */
3030 /* Same as xcoff_get_n_import_files, but for core files. */
3033 xcoff_get_core_n_import_files (bfd
*abfd
)
3035 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3037 file_ptr offset
= 0;
3041 return -1; /* Not a core file. */
3043 for (offset
= 0; offset
< bfd_section_size (sect
);)
3049 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3051 next
= bfd_get_32 (abfd
, buf
);
3053 break; /* This is the last entry. */
3057 /* Return the number of entries, excluding the first one, which is
3058 the path to the executable that produced this core file. */
3059 return n_entries
- 1;
3062 /* Return the number of import files (shared libraries) that the given
3063 BFD depends on. Return -1 if this number could not be computed. */
3066 xcoff_get_n_import_files (bfd
*abfd
)
3068 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3072 /* If the ".loader" section does not exist, the objfile is probably
3073 not an executable. Might be a core file... */
3075 return xcoff_get_core_n_import_files (abfd
);
3077 /* The number of entries in the Import Files Table is stored in
3078 field l_nimpid. This field is always at offset 16, and is
3079 always 4 bytes long. Read those 4 bytes. */
3081 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3083 l_nimpid
= bfd_get_32 (abfd
, buf
);
3085 /* By convention, the first entry is the default LIBPATH value
3086 to be used by the system loader, so it does not count towards
3087 the number of import files. */
3088 return l_nimpid
- 1;
3091 void _initialize_xcoffread ();
3093 _initialize_xcoffread ()
3095 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);