1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2022 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"
50 #include "dwarf2/sect-names.h"
51 #include "dwarf2/public.h"
53 #include "gdb-stabs.h"
55 /* For interface with stabsread.c. */
56 #include "aout/stab_gnu.h"
59 /* We put a pointer to this structure in the read_symtab_private field
65 /* First symbol number for this file. */
69 /* Number of symbols in the section of the symbol table devoted to
70 this file's symbols (actually, the section bracketed may contain
71 more than just this file's symbols). If numsyms is 0, the only
72 reason for this thing's existence is the dependency list. Nothing
73 else will happen when it is read in. */
77 /* Position of the start of the line number information for this
79 unsigned int lineno_off
;
82 /* Remember what we deduced to be the source language of this psymtab. */
84 static enum language psymtab_language
= language_unknown
;
87 /* Simplified internal version of coff symbol table information. */
92 int c_symnum
; /* Symbol number of this entry. */
93 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
95 unsigned char c_sclass
;
100 /* Last function's saved coff symbol `cs'. */
102 static struct coff_symbol fcn_cs_saved
;
104 static bfd
*symfile_bfd
;
106 /* Core address of start and end of text of current source file.
107 This is calculated from the first function seen after a C_FILE
111 static CORE_ADDR cur_src_end_addr
;
113 /* Core address of the end of the first object file. */
115 static CORE_ADDR first_object_file_end
;
117 /* Initial symbol-table-debug-string vector length. */
119 #define INITIAL_STABVECTOR_LENGTH 40
121 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
122 there is any reason not to just use a #define, but might as well
123 ask BFD for the size and store it here, I guess. */
125 static unsigned local_symesz
;
127 struct xcoff_symfile_info
129 file_ptr min_lineno_offset
{}; /* Where in file lowest line#s are. */
130 file_ptr max_lineno_offset
{}; /* 1+last byte of line#s in file. */
132 /* Pointer to the string table. */
133 char *strtbl
= nullptr;
135 /* Pointer to debug section. */
136 char *debugsec
= nullptr;
138 /* Pointer to the a.out symbol table. */
139 char *symtbl
= nullptr;
141 /* Number of symbols in symtbl. */
142 int symtbl_num_syms
= 0;
144 /* Offset in data section to TOC anchor. */
145 CORE_ADDR toc_offset
= 0;
148 /* Key for XCOFF-associated data. */
150 static const struct objfile_key
<xcoff_symfile_info
> xcoff_objfile_data_key
;
152 /* Convenience macro to access the per-objfile XCOFF data. */
154 #define XCOFF_DATA(objfile) \
155 xcoff_objfile_data_key.get (objfile)
157 /* XCOFF names for dwarf sections. There is no compressed sections. */
159 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
161 { ".dwabrev", NULL
},
164 { NULL
, NULL
}, /* debug_loclists */
165 /* AIX XCOFF defines one, named DWARF section for macro debug information.
166 XLC does not generate debug_macinfo for DWARF4 and below.
167 The section is assigned to debug_macro for DWARF5 and above. */
171 { NULL
, NULL
}, /* debug_str_offsets */
172 { NULL
, NULL
}, /* debug_line_str */
173 { ".dwrnges", NULL
},
174 { NULL
, NULL
}, /* debug_rnglists */
175 { ".dwpbtyp", NULL
},
176 { NULL
, NULL
}, /* debug_addr */
177 { ".dwframe", NULL
},
178 { NULL
, NULL
}, /* eh_frame */
179 { NULL
, NULL
}, /* gdb_index */
180 { NULL
, NULL
}, /* debug_names */
181 { NULL
, NULL
}, /* debug_aranges */
186 bf_notfound_complaint (void)
188 complaint (_("line numbers off, `.bf' symbol not found"));
192 ef_complaint (int arg1
)
194 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
198 eb_complaint (int arg1
)
200 complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
203 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
205 static void scan_xcoff_symtab (minimal_symbol_reader
&,
206 psymtab_storage
*partial_symtabs
,
209 static const char *xcoff_next_symbol_text (struct objfile
*);
211 static void record_include_begin (struct coff_symbol
*);
214 enter_line_range (struct subfile
*, unsigned, unsigned,
215 CORE_ADDR
, CORE_ADDR
, unsigned *);
217 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
219 static void xcoff_symfile_init (struct objfile
*);
221 static void xcoff_new_init (struct objfile
*);
223 static void xcoff_symfile_finish (struct objfile
*);
225 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
227 static void read_symbol (struct internal_syment
*, int);
229 static int read_symbol_lineno (int);
231 static CORE_ADDR
read_symbol_nvalue (int);
233 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
236 static void read_xcoff_symtab (struct objfile
*, legacy_psymtab
*);
239 static void add_stab_to_list (char *, struct pending_stabs
**);
242 static struct linetable
*arrange_linetable (struct linetable
*);
244 static void record_include_end (struct coff_symbol
*);
246 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
249 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
251 static int secnum_to_section (int, struct objfile
*);
252 static asection
*secnum_to_bfd_section (int, struct objfile
*);
254 struct find_targ_sec_arg
259 struct objfile
*objfile
;
262 static void find_targ_sec (bfd
*, asection
*, void *);
265 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
267 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
268 struct objfile
*objfile
= args
->objfile
;
270 if (sect
->target_index
== args
->targ_index
)
272 /* This is the section. Figure out what SECT_OFF_* code it is. */
273 if (bfd_section_flags (sect
) & SEC_CODE
)
274 *args
->resultp
= SECT_OFF_TEXT (objfile
);
275 else if (bfd_section_flags (sect
) & SEC_LOAD
)
276 *args
->resultp
= SECT_OFF_DATA (objfile
);
278 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
279 *args
->bfd_sect
= sect
;
283 /* Search all BFD sections for the section whose target_index is
284 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
285 associated index in the objfile's section_offset table is also
288 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
289 is set to the text section's number. */
292 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
293 asection
**bfd_sect
, int *secnum
)
295 struct find_targ_sec_arg args
;
297 args
.targ_index
= n_scnum
;
298 args
.resultp
= secnum
;
299 args
.bfd_sect
= bfd_sect
;
300 args
.objfile
= objfile
;
303 *secnum
= SECT_OFF_TEXT (objfile
);
305 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
308 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
311 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
316 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
320 /* Return the BFD section that N_SCNUM points to. */
323 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
328 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
332 /* add a given stab string into given stab vector. */
337 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
339 if (*stabvector
== NULL
)
341 *stabvector
= (struct pending_stabs
*)
342 xmalloc (sizeof (struct pending_stabs
) +
343 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
344 (*stabvector
)->count
= 0;
345 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
347 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
349 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
350 *stabvector
= (struct pending_stabs
*)
351 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
352 (*stabvector
)->length
* sizeof (char *));
354 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
359 /* Linenos are processed on a file-by-file basis.
363 1) xlc (IBM's native c compiler) postpones static function code
364 emission to the end of a compilation unit. This way it can
365 determine if those functions (statics) are needed or not, and
366 can do some garbage collection (I think). This makes line
367 numbers and corresponding addresses unordered, and we end up
368 with a line table like:
385 and that breaks gdb's binary search on line numbers, if the
386 above table is not sorted on line numbers. And that sort
387 should be on function based, since gcc can emit line numbers
390 10 0x100 - for the init/test part of a for stmt.
393 10 0x400 - for the increment part of a for stmt.
395 arrange_linetable() will do this sorting.
397 2) aix symbol table might look like:
399 c_file // beginning of a new file
400 .bi // beginning of include file
401 .ei // end of include file
405 basically, .bi/.ei pairs do not necessarily encapsulate
406 their scope. They need to be recorded, and processed later
407 on when we come the end of the compilation unit.
408 Include table (inclTable) and process_linenos() handle
413 /* Given a line table with function entries are marked, arrange its
414 functions in ascending order and strip off function entry markers
415 and return it in a newly created table. If the old one is good
416 enough, return the old one. */
417 /* FIXME: I think all this stuff can be replaced by just passing
418 sort_linevec = 1 to end_compunit_symtab. */
420 static struct linetable
*
421 arrange_linetable (struct linetable
*oldLineTb
)
423 int ii
, jj
, newline
, /* new line count */
424 function_count
; /* # of functions */
426 struct linetable_entry
*fentry
; /* function entry vector */
427 int fentry_size
; /* # of function entries */
428 struct linetable
*newLineTb
; /* new line table */
431 #define NUM_OF_FUNCTIONS 20
433 fentry_size
= NUM_OF_FUNCTIONS
;
434 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
436 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
438 if (oldLineTb
->item
[ii
].is_stmt
== 0)
441 if (oldLineTb
->item
[ii
].line
== 0)
442 { /* Function entry found. */
443 if (function_count
>= fentry_size
)
444 { /* Make sure you have room. */
446 fentry
= (struct linetable_entry
*)
448 fentry_size
* sizeof (struct linetable_entry
));
450 fentry
[function_count
].line
= ii
;
451 fentry
[function_count
].is_stmt
= 1;
452 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
455 /* If the function was compiled with XLC, we may have to add an
456 extra line entry later. Reserve space for that. */
457 if (ii
+ 1 < oldLineTb
->nitems
458 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
463 if (function_count
== 0)
468 else if (function_count
> 1)
469 std::sort (fentry
, fentry
+ function_count
,
470 [] (const linetable_entry
<e1
, const linetable_entry
& lte2
)
471 { return lte1
.pc
< lte2
.pc
; });
473 /* Allocate a new line table. */
474 newLineTb
= (struct linetable
*)
476 (sizeof (struct linetable
) +
477 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
479 /* If line table does not start with a function beginning, copy up until
483 if (oldLineTb
->item
[0].line
!= 0)
485 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
;
487 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
489 /* Now copy function lines one by one. */
491 for (ii
= 0; ii
< function_count
; ++ii
)
493 /* If the function was compiled with XLC, we may have to add an
494 extra line to cover the function prologue. */
495 jj
= fentry
[ii
].line
;
496 if (jj
+ 1 < oldLineTb
->nitems
497 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
499 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
500 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
504 for (jj
= fentry
[ii
].line
+ 1;
505 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
507 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
510 /* The number of items in the line table must include these
511 extra lines which were added in case of XLC compiled functions. */
512 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
516 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
517 following `IncludeChain'. At the end of each symtab (end_compunit_symtab),
518 we will determine if we should create additional symtab's to
519 represent if (the include files. */
522 typedef struct _inclTable
524 char *name
; /* include filename */
526 /* Offsets to the line table. end points to the last entry which is
527 part of this include file. */
530 struct subfile
*subfile
;
531 unsigned funStartLine
; /* Start line # of its function. */
535 #define INITIAL_INCLUDE_TABLE_LENGTH 20
536 static InclTable
*inclTable
; /* global include table */
537 static int inclIndx
; /* last entry to table */
538 static int inclLength
; /* table length */
539 static int inclDepth
; /* nested include depth */
541 static void allocate_include_entry (void);
544 record_include_begin (struct coff_symbol
*cs
)
548 /* In xcoff, we assume include files cannot be nested (not in .c files
549 of course, but in corresponding .s files.). */
551 /* This can happen with old versions of GCC.
552 GCC 2.3.3-930426 does not exhibit this on a test case which
553 a user said produced the message for him. */
554 complaint (_("Nested C_BINCL symbols"));
558 allocate_include_entry ();
560 inclTable
[inclIndx
].name
= cs
->c_name
;
561 inclTable
[inclIndx
].begin
= cs
->c_value
;
565 record_include_end (struct coff_symbol
*cs
)
571 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
574 allocate_include_entry ();
576 pTbl
= &inclTable
[inclIndx
];
577 pTbl
->end
= cs
->c_value
;
584 allocate_include_entry (void)
586 if (inclTable
== NULL
)
588 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
589 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
592 else if (inclIndx
>= inclLength
)
594 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
595 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
596 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
597 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
601 /* Global variable to pass the psymtab down to all the routines involved
602 in psymtab to symtab processing. */
603 static legacy_psymtab
*this_symtab_psymtab
;
605 /* Objfile related to this_symtab_psymtab; set at the same time. */
606 static struct objfile
*this_symtab_objfile
;
608 /* given the start and end addresses of a compilation unit (or a csect,
609 at times) process its lines and create appropriate line vectors. */
612 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
616 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
618 /* subfile structure for the main compilation unit. */
619 struct subfile main_subfile
;
621 /* In the main source file, any time we see a function entry, we
622 reset this variable to function's absolute starting line number.
623 All the following line numbers in the function are relative to
624 this, and we record absolute line numbers in record_line(). */
626 unsigned int main_source_baseline
= 0;
631 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
633 goto return_after_cleanup
;
635 memset (&main_subfile
, '\0', sizeof (main_subfile
));
638 /* All source lines were in the main source file. None in include
641 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
642 &main_source_baseline
);
646 /* There was source with line numbers in include files. */
649 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
650 main_source_baseline
= 0;
652 for (ii
= 0; ii
< inclIndx
; ++ii
)
654 struct subfile
*tmpSubfile
;
656 /* If there is main file source before include file, enter it. */
657 if (offset
< inclTable
[ii
].begin
)
660 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
661 start
, 0, &main_source_baseline
);
664 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
666 /* The entry in the include table refers to the main source
667 file. Add the lines to the main subfile. */
669 main_source_baseline
= inclTable
[ii
].funStartLine
;
671 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
672 start
, 0, &main_source_baseline
);
673 inclTable
[ii
].subfile
= &main_subfile
;
677 /* Have a new subfile for the include file. */
679 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
681 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
682 firstLine
= &(inclTable
[ii
].funStartLine
);
684 /* Enter include file's lines now. */
685 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
686 inclTable
[ii
].end
, start
, 0, firstLine
);
689 if (offset
<= inclTable
[ii
].end
)
690 offset
= inclTable
[ii
].end
+ linesz
;
693 /* All the include files' line have been processed at this point. Now,
694 enter remaining lines of the main file, if any left. */
695 if (offset
< max_offset
+ 1 - linesz
)
697 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
698 &main_source_baseline
);
702 /* Process main file's line numbers. */
703 if (main_subfile
.line_vector
)
705 struct linetable
*lineTb
, *lv
;
707 lv
= main_subfile
.line_vector
;
709 /* Line numbers are not necessarily ordered. xlc compilation will
710 put static function to the end. */
712 struct subfile
*current_subfile
= get_current_subfile ();
713 lineTb
= arrange_linetable (lv
);
716 current_subfile
->line_vector
= (struct linetable
*)
717 xrealloc (lv
, (sizeof (struct linetable
)
718 + lv
->nitems
* sizeof (struct linetable_entry
)));
723 current_subfile
->line_vector
= lineTb
;
726 current_subfile
->line_vector_length
=
727 current_subfile
->line_vector
->nitems
;
730 /* Now, process included files' line numbers. */
732 for (ii
= 0; ii
< inclIndx
; ++ii
)
734 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
735 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
738 struct linetable
*lineTb
, *lv
;
740 lv
= (inclTable
[ii
].subfile
)->line_vector
;
742 /* Line numbers are not necessarily ordered. xlc compilation will
743 put static function to the end. */
745 lineTb
= arrange_linetable (lv
);
749 /* For the same include file, we might want to have more than one
750 subfile. This happens if we have something like:
758 while foo.h including code in it. (stupid but possible)
759 Since start_subfile() looks at the name and uses an
760 existing one if finds, we need to provide a fake name and
764 start_subfile (inclTable
[ii
].name
);
767 /* Pick a fake name that will produce the same results as this
768 one when passed to deduce_language_from_filename. Kludge on
770 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
772 if (fakename
== NULL
)
774 start_subfile (fakename
);
775 xfree (get_current_subfile ()->name
);
777 struct subfile
*current_subfile
= get_current_subfile ();
778 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
783 current_subfile
->line_vector
=
784 (struct linetable
*) xrealloc
785 (lv
, (sizeof (struct linetable
)
786 + lv
->nitems
* sizeof (struct linetable_entry
)));
792 current_subfile
->line_vector
= lineTb
;
795 current_subfile
->line_vector_length
=
796 current_subfile
->line_vector
->nitems
;
797 start_subfile (pop_subfile ());
801 return_after_cleanup
:
803 /* We don't want to keep alloc/free'ing the global include file table. */
808 aix_process_linenos (struct objfile
*objfile
)
810 /* There is no linenos to read if there are only dwarf info. */
811 if (this_symtab_psymtab
== NULL
)
814 /* Process line numbers and enter them into line vector. */
815 process_linenos (get_last_source_start_addr (), cur_src_end_addr
);
819 /* Enter a given range of lines into the line vector.
820 can be called in the following two ways:
821 enter_line_range (subfile, beginoffset, endoffset,
822 startaddr, 0, firstLine) or
823 enter_line_range (subfile, beginoffset, 0,
824 startaddr, endaddr, firstLine)
826 endoffset points to the last line table entry that we should pay
830 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
831 unsigned endoffset
, /* offsets to line table */
832 CORE_ADDR startaddr
, /* offsets to line table */
833 CORE_ADDR endaddr
, unsigned *firstLine
)
835 struct objfile
*objfile
= this_symtab_objfile
;
836 struct gdbarch
*gdbarch
= objfile
->arch ();
837 unsigned int curoffset
;
840 struct internal_lineno int_lnno
;
841 unsigned int limit_offset
;
845 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
847 curoffset
= beginoffset
;
848 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
852 if (endoffset
>= limit_offset
)
854 complaint (_("Bad line table offset in C_EINCL directive"));
857 limit_offset
= endoffset
;
862 abfd
= objfile
->obfd
;
863 linesz
= coff_data (abfd
)->local_linesz
;
864 ext_lnno
= alloca (linesz
);
866 while (curoffset
<= limit_offset
)
868 bfd_seek (abfd
, curoffset
, SEEK_SET
);
869 bfd_bread (ext_lnno
, linesz
, abfd
);
870 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
872 /* Find the address this line represents. */
873 addr
= (int_lnno
.l_lnno
874 ? int_lnno
.l_addr
.l_paddr
875 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
876 addr
+= objfile
->text_section_offset ();
878 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
881 if (int_lnno
.l_lnno
== 0)
883 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
884 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
888 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
889 gdbarch_addr_bits_remove (gdbarch
, addr
));
895 /* Save the vital information for use when closing off the current file.
896 NAME is the file name the symbols came from, START_ADDR is the first
897 text address for the file, and SIZE is the number of bytes of text. */
899 #define complete_symtab(name, start_addr) { \
900 set_last_source_file (name); \
901 set_last_source_start_addr (start_addr); \
905 /* Refill the symbol table input buffer
906 and set the variables that control fetching entries from it.
907 Reports an error if no data available.
908 This function can read past the end of the symbol table
909 (into the string table) but this does no harm. */
911 /* Create a new minimal symbol (using record_with_info).
913 Creation of all new minimal symbols should go through this function
914 rather than calling the various record functions in order
915 to make sure that all symbol addresses get properly relocated.
919 NAME - the symbol's name (but if NAME starts with a period, that
920 leading period is discarded).
921 ADDRESS - the symbol's address, prior to relocation. This function
922 relocates the address before recording the minimal symbol.
923 MS_TYPE - the symbol's type.
924 N_SCNUM - the symbol's XCOFF section number.
925 OBJFILE - the objfile associated with the minimal symbol. */
928 record_minimal_symbol (minimal_symbol_reader
&reader
,
929 const char *name
, CORE_ADDR address
,
930 enum minimal_symbol_type ms_type
,
932 struct objfile
*objfile
)
937 reader
.record_with_info (name
, address
, ms_type
,
938 secnum_to_section (n_scnum
, objfile
));
941 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
942 nested. At any given time, a symbol can only be in one static block.
943 This is the base address of current static block, zero if non exists. */
945 static int static_block_base
= 0;
947 /* Section number for the current static block. */
949 static int static_block_section
= -1;
951 /* true if space for symbol name has been allocated. */
953 static int symname_alloced
= 0;
955 /* Next symbol to read. Pointer into raw seething symbol table. */
957 static char *raw_symbol
;
959 /* This is the function which stabsread.c calls to get symbol
963 xcoff_next_symbol_text (struct objfile
*objfile
)
965 struct internal_syment symbol
;
968 /* FIXME: is this the same as the passed arg? */
969 if (this_symtab_objfile
)
970 objfile
= this_symtab_objfile
;
972 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
975 complaint (_("Unexpected symbol continuation"));
977 /* Return something which points to '\0' and hope the symbol reading
978 code does something reasonable. */
981 else if (symbol
.n_sclass
& 0x80)
983 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
984 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
989 complaint (_("Unexpected symbol continuation"));
991 /* Return something which points to '\0' and hope the symbol reading
992 code does something reasonable. */
998 /* Read symbols for a given partial symbol table. */
1001 read_xcoff_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
1003 bfd
*abfd
= objfile
->obfd
;
1004 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1005 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1006 char *strtbl
= xcoff
->strtbl
;
1007 char *debugsec
= xcoff
->debugsec
;
1008 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1010 struct internal_syment symbol
[1];
1011 union internal_auxent main_aux
;
1012 struct coff_symbol cs
[1];
1013 CORE_ADDR file_start_addr
= 0;
1014 CORE_ADDR file_end_addr
= 0;
1016 int next_file_symnum
= -1;
1017 unsigned int max_symnum
;
1018 int just_started
= 1;
1020 CORE_ADDR fcn_start_addr
= 0;
1021 enum language pst_symtab_language
;
1023 struct coff_symbol fcn_stab_saved
= { 0 };
1025 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1026 union internal_auxent fcn_aux_saved
= main_aux
;
1027 struct context_stack
*newobj
;
1029 const char *filestring
= pst
->filename
; /* Name of the current file. */
1031 const char *last_csect_name
; /* Last seen csect's name. */
1033 this_symtab_psymtab
= pst
;
1034 this_symtab_objfile
= objfile
;
1036 /* Get the appropriate COFF "constants" related to the file we're
1038 local_symesz
= coff_data (abfd
)->local_symesz
;
1040 set_last_source_file (NULL
);
1041 last_csect_name
= 0;
1042 pst_symtab_language
= deduce_language_from_filename (filestring
);
1045 start_compunit_symtab (objfile
, filestring
, NULL
, file_start_addr
,
1046 pst_symtab_language
);
1047 record_debugformat (debugfmt
);
1048 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1050 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1051 first_object_file_end
= 0;
1053 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1055 while (symnum
< max_symnum
)
1057 QUIT
; /* make this command interruptable. */
1059 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1060 /* read one symbol into `cs' structure. After processing the
1061 whole symbol table, only string table will be kept in memory,
1062 symbol table and debug section of xcoff will be freed. Thus
1063 we can mark symbols with names in string table as
1068 /* Swap and align the symbol into a reasonable C structure. */
1069 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1071 cs
->c_symnum
= symnum
;
1072 cs
->c_naux
= symbol
->n_numaux
;
1073 if (symbol
->n_zeroes
)
1075 symname_alloced
= 0;
1076 /* We must use the original, unswapped, name here so the name field
1077 pointed to by cs->c_name will persist throughout xcoffread. If
1078 we use the new field, it gets overwritten for each symbol. */
1079 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1080 /* If it's exactly E_SYMNMLEN characters long it isn't
1082 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1086 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1088 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1089 p
[E_SYMNMLEN
] = '\0';
1091 symname_alloced
= 1;
1094 else if (symbol
->n_sclass
& 0x80)
1096 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1097 symname_alloced
= 0;
1101 /* in string table */
1102 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1103 symname_alloced
= 1;
1105 cs
->c_value
= symbol
->n_value
;
1106 cs
->c_sclass
= symbol
->n_sclass
;
1107 cs
->c_secnum
= symbol
->n_scnum
;
1108 cs
->c_type
= (unsigned) symbol
->n_type
;
1110 raw_symbol
+= local_symesz
;
1113 /* Save addr of first aux entry. */
1114 raw_auxptr
= raw_symbol
;
1116 /* Skip all the auxents associated with this symbol. */
1117 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1119 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1124 /* if symbol name starts with ".$" or "$", ignore it. */
1125 if (cs
->c_name
[0] == '$'
1126 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1129 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1131 if (get_last_source_file ())
1133 pst
->compunit_symtab
= end_compunit_symtab
1134 (cur_src_end_addr
, SECT_OFF_TEXT (objfile
));
1139 start_compunit_symtab (objfile
, "_globals_", NULL
,
1140 0, pst_symtab_language
);
1141 record_debugformat (debugfmt
);
1142 cur_src_end_addr
= first_object_file_end
;
1143 /* Done with all files, everything from here on is globals. */
1146 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1147 cs
->c_sclass
== C_WEAKEXT
)
1149 /* Dealing with a symbol with a csect entry. */
1151 #define CSECT(PP) ((PP)->x_csect)
1152 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1153 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1154 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1155 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1157 /* Convert the auxent to something we can access.
1158 XCOFF can have more than one auxiliary entries.
1160 Actual functions will have two auxiliary entries, one to have the
1161 function size and other to have the smtype/smclass (LD/PR).
1163 c_type value of main symbol table will be set only in case of
1164 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1165 Bit 10 of type is set if symbol is a function, ie the value is set
1166 to 32(0x20). So we need to read the first function auxiliary entry
1167 which contains the size. */
1168 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1170 /* a function entry point. */
1172 fcn_start_addr
= cs
->c_value
;
1174 /* save the function header info, which will be used
1175 when `.bf' is seen. */
1178 /* Convert the auxent to something we can access. */
1179 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1180 0, cs
->c_naux
, &fcn_aux_saved
);
1183 /* Read the csect auxiliary header, which is always the last by
1185 bfd_coff_swap_aux_in (abfd
,
1187 + ((coff_data (abfd
)->local_symesz
)
1188 * (cs
->c_naux
- 1)),
1189 cs
->c_type
, cs
->c_sclass
,
1190 cs
->c_naux
- 1, cs
->c_naux
,
1193 switch (CSECT_SMTYP (&main_aux
))
1197 /* Ignore all external references. */
1201 /* A section description. */
1203 switch (CSECT_SCLAS (&main_aux
))
1209 /* A program csect is seen. We have to allocate one
1210 symbol table for each program csect. Normally gdb
1211 prefers one symtab for each source file. In case
1212 of AIX, one source file might include more than one
1213 [PR] csect, and they don't have to be adjacent in
1214 terms of the space they occupy in memory. Thus, one
1215 single source file might get fragmented in the
1216 memory and gdb's file start and end address
1217 approach does not work! GCC (and I think xlc) seem
1218 to put all the code in the unnamed program csect. */
1220 if (last_csect_name
)
1222 complete_symtab (filestring
, file_start_addr
);
1223 cur_src_end_addr
= file_end_addr
;
1224 end_compunit_symtab (file_end_addr
,
1225 SECT_OFF_TEXT (objfile
));
1228 /* Give all csects for this source file the same
1230 start_compunit_symtab (objfile
, filestring
, NULL
,
1231 0, pst_symtab_language
);
1232 record_debugformat (debugfmt
);
1235 /* If this is the very first csect seen,
1236 basically `__start'. */
1239 first_object_file_end
1240 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1245 cs
->c_value
+ objfile
->text_section_offset ();
1246 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1248 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1249 last_csect_name
= cs
->c_name
;
1253 /* All other symbols are put into the minimal symbol
1266 /* Ignore the symbol. */
1274 switch (CSECT_SCLAS (&main_aux
))
1276 /* We never really come to this part as this case has been
1277 handled in ISFCN check above.
1278 This and other cases of XTY_LD are kept just for
1284 /* shared library function trampoline code entry point. */
1288 /* The symbols often have the same names as debug symbols for
1289 functions, and confuse lookup_symbol. */
1293 /* xlc puts each variable in a separate csect, so we get
1294 an XTY_SD for each variable. But gcc puts several
1295 variables in a csect, so that each variable only gets
1296 an XTY_LD. This will typically be XMC_RW; I suspect
1297 XMC_RO and XMC_BS might be possible too.
1298 These variables are put in the minimal symbol table
1305 /* Common symbols are put into the minimal symbol table only. */
1313 switch (cs
->c_sclass
)
1317 /* c_value field contains symnum of next .file entry in table
1318 or symnum of first global after last .file. */
1320 next_file_symnum
= cs
->c_value
;
1322 /* Complete symbol table for last object file containing
1323 debugging information. */
1325 /* Whether or not there was a csect in the previous file, we
1326 have to call `end_stabs' and `start_stabs' to reset
1327 type_vector, line_vector, etc. structures. */
1329 complete_symtab (filestring
, file_start_addr
);
1330 cur_src_end_addr
= file_end_addr
;
1331 end_compunit_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1334 /* XCOFF, according to the AIX 3.2 documentation, puts the
1335 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1336 do things the standard COFF way and put it in the auxent.
1337 We use the auxent if the symbol is ".file" and an auxent
1338 exists, otherwise use the symbol itself. Simple
1340 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1342 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1343 0, cs
->c_naux
, &main_aux
);
1344 filestring
= coff_getfilename (&main_aux
, objfile
);
1347 filestring
= cs
->c_name
;
1350 start_compunit_symtab (objfile
, filestring
, NULL
, 0,
1351 pst_symtab_language
);
1352 record_debugformat (debugfmt
);
1353 last_csect_name
= 0;
1355 /* reset file start and end addresses. A compilation unit
1356 with no text (only data) should have zero file
1358 file_start_addr
= file_end_addr
= 0;
1362 fcn_stab_saved
= *cs
;
1366 if (strcmp (cs
->c_name
, ".bf") == 0)
1368 CORE_ADDR off
= objfile
->text_section_offset ();
1370 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1371 0, cs
->c_naux
, &main_aux
);
1373 within_function
= 1;
1375 newobj
= push_context (0, fcn_start_addr
+ off
);
1377 newobj
->name
= define_symbol
1378 (fcn_cs_saved
.c_value
+ off
,
1379 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1380 if (newobj
->name
!= NULL
)
1381 newobj
->name
->set_section_index (SECT_OFF_TEXT (objfile
));
1383 else if (strcmp (cs
->c_name
, ".ef") == 0)
1385 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1386 0, cs
->c_naux
, &main_aux
);
1388 /* The value of .ef is the address of epilogue code;
1389 not useful for gdb. */
1390 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1391 contains number of lines to '}' */
1393 if (outermost_context_p ())
1394 { /* We attempted to pop an empty context stack. */
1395 ef_complaint (cs
->c_symnum
);
1396 within_function
= 0;
1399 struct context_stack cstk
= pop_context ();
1400 /* Stack must be empty now. */
1401 if (!outermost_context_p ())
1403 ef_complaint (cs
->c_symnum
);
1404 within_function
= 0;
1408 finish_block (cstk
.name
, cstk
.old_blocks
,
1409 NULL
, cstk
.start_addr
,
1410 (fcn_cs_saved
.c_value
1411 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1412 + objfile
->text_section_offset ()));
1413 within_function
= 0;
1418 /* Begin static block. */
1420 struct internal_syment static_symbol
;
1422 read_symbol (&static_symbol
, cs
->c_value
);
1423 static_block_base
= static_symbol
.n_value
;
1424 static_block_section
=
1425 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1430 /* End of static block. */
1431 static_block_base
= 0;
1432 static_block_section
= -1;
1443 complaint (_("Unrecognized storage class %d."),
1458 /* beginning of include file */
1459 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1460 order. Thus, when wee see them, we might not know enough info
1461 to process them. Thus, we'll be saving them into a table
1462 (inclTable) and postpone their processing. */
1464 record_include_begin (cs
);
1468 /* End of include file. */
1469 /* See the comment after case C_BINCL. */
1470 record_include_end (cs
);
1474 if (strcmp (cs
->c_name
, ".bb") == 0)
1477 newobj
= push_context (depth
,
1479 + objfile
->text_section_offset ()));
1481 else if (strcmp (cs
->c_name
, ".eb") == 0)
1483 if (outermost_context_p ())
1484 { /* We attempted to pop an empty context stack. */
1485 eb_complaint (cs
->c_symnum
);
1488 struct context_stack cstk
= pop_context ();
1489 if (depth
-- != cstk
.depth
)
1491 eb_complaint (cs
->c_symnum
);
1494 if (*get_local_symbols () && !outermost_context_p ())
1496 /* Make a block for the local symbols within. */
1497 finish_block (cstk
.name
,
1498 cstk
.old_blocks
, NULL
,
1501 + objfile
->text_section_offset ()));
1503 *get_local_symbols () = cstk
.locals
;
1508 process_xcoff_symbol (cs
, objfile
);
1513 if (get_last_source_file ())
1515 struct compunit_symtab
*cust
;
1517 complete_symtab (filestring
, file_start_addr
);
1518 cur_src_end_addr
= file_end_addr
;
1519 cust
= end_compunit_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1520 /* When reading symbols for the last C_FILE of the objfile, try
1521 to make sure that we set pst->compunit_symtab to the symtab for the
1522 file, not to the _globals_ symtab. I'm not sure whether this
1523 actually works right or when/if it comes up. */
1524 if (pst
->compunit_symtab
== NULL
)
1525 pst
->compunit_symtab
= cust
;
1530 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1531 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1535 /* process one xcoff symbol. */
1537 static struct symbol
*
1538 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1540 struct symbol onesymbol
;
1541 struct symbol
*sym
= &onesymbol
;
1542 struct symbol
*sym2
= NULL
;
1548 if (cs
->c_secnum
< 0)
1550 /* The value is a register number, offset within a frame, etc.,
1551 and does not get relocated. */
1557 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1558 off
= objfile
->section_offsets
[sec
];
1565 /* default assumptions */
1566 sym
->set_value_address (cs
->c_value
+ off
);
1567 sym
->set_domain (VAR_DOMAIN
);
1568 sym
->set_section_index (secnum_to_section (cs
->c_secnum
, objfile
));
1570 if (ISFCN (cs
->c_type
))
1572 /* At this point, we don't know the type of the function. This
1573 will be patched with the type from its stab entry later on in
1574 patch_block_stabs (), unless the file was compiled without -g. */
1576 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1577 sym
->set_type (objfile_type (objfile
)->nodebug_text_symbol
);
1579 sym
->set_aclass_index (LOC_BLOCK
);
1580 sym2
= new (&objfile
->objfile_obstack
) symbol (*sym
);
1582 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1583 add_symbol_to_list (sym2
, get_global_symbols ());
1584 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1585 add_symbol_to_list (sym2
, get_file_symbols ());
1589 /* In case we can't figure out the type, provide default. */
1590 sym
->set_type (objfile_type (objfile
)->nodebug_data_symbol
);
1592 switch (cs
->c_sclass
)
1595 /* The values of functions and global symbols are now resolved
1596 via the global_sym_chain in stabsread.c. */
1598 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1599 add_stab_to_list (name
, &global_stabs
);
1601 add_stab_to_list (name
, &file_stabs
);
1605 add_stab_to_list (name
, &global_stabs
);
1610 common_block_start (cs
->c_name
, objfile
);
1614 common_block_end (objfile
);
1618 complaint (_("Unexpected storage class: %d"),
1631 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1634 sym
->set_section_index (sec
);
1641 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1642 all statics and we need to distinguish file-scope versus
1643 function-scope using within_function. We do this by
1644 changing the string we pass to define_symbol to use 'S'
1645 where we need to, which is not necessarily super-clean,
1646 but seems workable enough. */
1651 pp
= strchr (name
, ':');
1656 if (*pp
== 'V' && !within_function
)
1658 sym
= define_symbol ((cs
->c_value
1659 + objfile
->section_offsets
[static_block_section
]),
1660 cs
->c_name
, 0, 0, objfile
);
1663 sym
->set_value_address
1664 (sym
->value_address () + static_block_base
);
1665 sym
->set_section_index (static_block_section
);
1674 /* Extract the file name from the aux entry of a C_FILE symbol.
1675 Result is in static storage and is only good for temporary use. */
1678 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1680 static char buffer
[BUFSIZ
];
1682 if (aux_entry
->x_file
.x_n
.x_n
.x_zeroes
== 0)
1683 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1684 + aux_entry
->x_file
.x_n
.x_n
.x_offset
));
1687 strncpy (buffer
, aux_entry
->x_file
.x_n
.x_fname
, FILNMLEN
);
1688 buffer
[FILNMLEN
] = '\0';
1693 /* Set *SYMBOL to symbol number symno in symtbl. */
1695 read_symbol (struct internal_syment
*symbol
, int symno
)
1697 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1698 int nsyms
= xcoff
->symtbl_num_syms
;
1699 char *stbl
= xcoff
->symtbl
;
1701 if (symno
< 0 || symno
>= nsyms
)
1703 complaint (_("Invalid symbol offset"));
1704 symbol
->n_value
= 0;
1705 symbol
->n_scnum
= -1;
1708 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1709 stbl
+ (symno
* local_symesz
),
1713 /* Get value corresponding to symbol number symno in symtbl. */
1716 read_symbol_nvalue (int symno
)
1718 struct internal_syment symbol
[1];
1720 read_symbol (symbol
, symno
);
1721 return symbol
->n_value
;
1725 /* Find the address of the function corresponding to symno, where
1726 symno is the symbol pointed to by the linetable. */
1729 read_symbol_lineno (int symno
)
1731 struct objfile
*objfile
= this_symtab_objfile
;
1732 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1734 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1735 int nsyms
= info
->symtbl_num_syms
;
1736 char *stbl
= info
->symtbl
;
1737 char *strtbl
= info
->strtbl
;
1739 struct internal_syment symbol
[1];
1740 union internal_auxent main_aux
[1];
1744 bf_notfound_complaint ();
1748 /* Note that just searching for a short distance (e.g. 50 symbols)
1749 is not enough, at least in the following case.
1752 [many .stabx entries]
1753 [a few functions, referring to foo]
1757 What happens here is that the assembler moves the .stabx entries
1758 to right before the ".bf" for foo, but the symbol for "foo" is before
1759 all the stabx entries. See PR gdb/2222. */
1761 /* Maintaining a table of .bf entries might be preferable to this search.
1762 If I understand things correctly it would need to be done only for
1763 the duration of a single psymtab to symtab conversion. */
1764 while (symno
< nsyms
)
1766 bfd_coff_swap_sym_in (symfile_bfd
,
1767 stbl
+ (symno
* local_symesz
), symbol
);
1768 if (symbol
->n_sclass
== C_FCN
)
1770 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1772 if (strcmp (name
, ".bf") == 0)
1775 symno
+= symbol
->n_numaux
+ 1;
1778 bf_notfound_complaint ();
1782 /* Take aux entry and return its lineno. */
1784 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1785 symbol
->n_type
, symbol
->n_sclass
,
1786 0, symbol
->n_numaux
, main_aux
);
1788 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1791 /* Support for line number handling. */
1793 /* This function is called for every section; it finds the outer limits
1794 * of the line table (minimum and maximum file offset) so that the
1795 * mainline code can read the whole thing for efficiency.
1798 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1800 struct xcoff_symfile_info
*info
;
1802 file_ptr offset
, maxoff
;
1804 count
= asect
->lineno_count
;
1806 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1809 size
= count
* coff_data (abfd
)->local_linesz
;
1810 info
= (struct xcoff_symfile_info
*) vpinfo
;
1811 offset
= asect
->line_filepos
;
1812 maxoff
= offset
+ size
;
1814 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1815 info
->min_lineno_offset
= offset
;
1817 if (maxoff
> info
->max_lineno_offset
)
1818 info
->max_lineno_offset
= maxoff
;
1822 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1824 gdb_assert (!pst
->readin
);
1826 /* Read in all partial symtabs on which this one is dependent. */
1827 pst
->expand_dependencies (objfile
);
1829 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1831 /* Init stuff necessary for reading in symbols. */
1834 scoped_free_pendings free_pending
;
1835 read_xcoff_symtab (objfile
, pst
);
1841 /* Read in all of the symbols for a given psymtab for real.
1842 Be verbose about it if the user wants that. SELF is not NULL. */
1845 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1847 gdb_assert (!self
->readin
);
1849 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1850 || self
->number_of_dependencies
)
1852 next_symbol_text_func
= xcoff_next_symbol_text
;
1854 self
->expand_psymtab (objfile
);
1856 /* Match with global symbols. This only needs to be done once,
1857 after all of the symtabs and dependencies have been read in. */
1858 scan_file_globals (objfile
);
1863 xcoff_new_init (struct objfile
*objfile
)
1865 stabsread_new_init ();
1868 /* Do initialization in preparation for reading symbols from OBJFILE.
1870 We will only be called if this is an XCOFF or XCOFF-like file.
1871 BFD handles figuring out the format of the file, and code in symfile.c
1872 uses BFD's determination to vector to us. */
1875 xcoff_symfile_init (struct objfile
*objfile
)
1877 /* Allocate struct to keep track of the symfile. */
1878 xcoff_objfile_data_key
.emplace (objfile
);
1880 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1881 find this causes a significant slowdown in gdb then we could
1882 set it in the debug symbol readers only when necessary. */
1883 objfile
->flags
|= OBJF_REORDERED
;
1886 /* Perform any local cleanups required when we are done with a particular
1887 objfile. I.E, we are in the process of discarding all symbol information
1888 for an objfile, freeing up all memory held for it, and unlinking the
1889 objfile struct from the global list of known objfiles. */
1892 xcoff_symfile_finish (struct objfile
*objfile
)
1894 /* Start with a fresh include table for the next objfile. */
1900 inclIndx
= inclLength
= inclDepth
= 0;
1905 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1909 unsigned char lengthbuf
[4];
1911 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1913 xcoff
->strtbl
= NULL
;
1915 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1916 error (_("cannot seek to string table in %s: %s"),
1917 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1919 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1920 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1922 /* If no string table is needed, then the file may end immediately
1923 after the symbols. Just return with `strtbl' set to NULL. */
1925 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1928 /* Allocate string table from objfile_obstack. We will need this table
1929 as long as we have its symbol table around. */
1931 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1932 xcoff
->strtbl
= strtbl
;
1934 /* Copy length buffer, the first byte is usually zero and is
1935 used for stabs with a name length of zero. */
1936 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1937 if (length
== sizeof lengthbuf
)
1940 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1942 if (val
!= length
- sizeof lengthbuf
)
1943 error (_("cannot read string table from %s: %s"),
1944 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1945 if (strtbl
[length
- 1] != '\0')
1946 error (_("bad symbol file: string table "
1947 "does not end with null character"));
1952 /* If we have not yet seen a function for this psymtab, this is 0. If we
1953 have seen one, it is the offset in the line numbers of the line numbers
1955 static unsigned int first_fun_line_offset
;
1957 /* Allocate and partially fill a partial symtab. It will be
1958 completely filled at the end of the symbol list.
1960 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1961 is the address relative to which its symbols are (incremental) or 0
1964 static legacy_psymtab
*
1965 xcoff_start_psymtab (psymtab_storage
*partial_symtabs
,
1966 struct objfile
*objfile
,
1967 const char *filename
, int first_symnum
)
1969 /* We fill in textlow later. */
1970 legacy_psymtab
*result
= new legacy_psymtab (filename
, partial_symtabs
,
1971 objfile
->per_bfd
, 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
, psymtab_storage
*partial_symtabs
,
1995 legacy_psymtab
*pst
,
1996 const char **include_list
, int num_includes
,
1997 int capping_symbol_number
,
1998 legacy_psymtab
**dependency_list
,
1999 int number_dependencies
, int textlow_not_set
)
2003 if (capping_symbol_number
!= -1)
2004 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2005 capping_symbol_number
2006 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2007 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2008 first_fun_line_offset
;
2009 first_fun_line_offset
= 0;
2013 pst
->number_of_dependencies
= number_dependencies
;
2014 if (number_dependencies
)
2017 = partial_symtabs
->allocate_dependencies (number_dependencies
);
2018 memcpy (pst
->dependencies
, dependency_list
,
2019 number_dependencies
* sizeof (legacy_psymtab
*));
2022 pst
->dependencies
= 0;
2024 for (i
= 0; i
< num_includes
; i
++)
2026 legacy_psymtab
*subpst
=
2027 new legacy_psymtab (include_list
[i
], partial_symtabs
, objfile
->per_bfd
);
2029 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, symloc
);
2030 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2031 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2033 /* We could save slight bits of space by only making one of these,
2034 shared by the entire set of include files. FIXME-someday. */
2035 subpst
->dependencies
=
2036 partial_symtabs
->allocate_dependencies (1);
2037 subpst
->dependencies
[0] = pst
;
2038 subpst
->number_of_dependencies
= 1;
2040 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
2041 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
2044 if (num_includes
== 0
2045 && number_dependencies
== 0
2048 /* Throw away this psymtab, it's empty. */
2049 /* Empty psymtabs happen as a result of header files which don't have
2050 any symbols in them. There can be a lot of them. */
2052 partial_symtabs
->discard_psymtab (pst
);
2054 /* Indicate that psymtab was thrown away. */
2060 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2061 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2062 the symbol and its auxents. */
2065 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2066 const char **name
, char **raw
, unsigned int *symnump
,
2067 struct objfile
*objfile
)
2069 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2070 if (symbol
->n_zeroes
)
2072 /* If it's exactly E_SYMNMLEN characters long it isn't
2074 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2076 /* FIXME: wastes memory for symbols which we don't end up putting
2077 into the minimal symbols. */
2080 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2082 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2083 p
[E_SYMNMLEN
] = '\0';
2087 /* Point to the unswapped name as that persists as long as the
2089 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2091 else if (symbol
->n_sclass
& 0x80)
2093 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2097 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2100 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2101 if (symbol
->n_numaux
> 0)
2103 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2104 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2106 *symnump
+= symbol
->n_numaux
;
2107 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2112 function_outside_compilation_unit_complaint (const char *arg1
)
2114 complaint (_("function `%s' appears to be defined "
2115 "outside of all compilation units"),
2120 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2121 psymtab_storage
*partial_symtabs
,
2122 struct objfile
*objfile
)
2124 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2125 const char *filestring
= NULL
;
2127 const char *namestring
;
2132 /* Current partial symtab */
2133 legacy_psymtab
*pst
;
2135 /* List of current psymtab's include files. */
2136 const char **psymtab_include_list
;
2137 int includes_allocated
;
2140 /* Index within current psymtab dependency list. */
2141 legacy_psymtab
**dependency_list
;
2142 int dependencies_used
, dependencies_allocated
;
2145 struct internal_syment symbol
;
2146 union internal_auxent main_aux
[5];
2147 unsigned int ssymnum
;
2149 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2150 CORE_ADDR last_csect_val
= 0;
2151 int last_csect_sec
= 0;
2152 int misc_func_recorded
= 0; /* true if any misc. function. */
2153 int textlow_not_set
= 1;
2155 pst
= (legacy_psymtab
*) 0;
2157 includes_allocated
= 30;
2159 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2160 sizeof (const char *));
2162 dependencies_allocated
= 30;
2163 dependencies_used
= 0;
2165 (legacy_psymtab
**) alloca (dependencies_allocated
*
2166 sizeof (legacy_psymtab
*));
2168 set_last_source_file (NULL
);
2170 abfd
= objfile
->obfd
;
2171 next_symbol_text_func
= xcoff_next_symbol_text
;
2173 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2174 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2176 while (ssymnum
< nsyms
)
2182 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2183 sclass
= symbol
.n_sclass
;
2191 /* The CSECT auxent--always the last auxent. */
2192 union internal_auxent csect_aux
;
2193 unsigned int symnum_before
= ssymnum
;
2195 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2197 if (symbol
.n_numaux
> 1)
2199 bfd_coff_swap_aux_in
2201 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2204 symbol
.n_numaux
- 1,
2209 csect_aux
= main_aux
[0];
2211 /* If symbol name starts with ".$" or "$", ignore it. */
2212 if (namestring
[0] == '$'
2213 || (namestring
[0] == '.' && namestring
[1] == '$'))
2216 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2219 switch (csect_aux
.x_csect
.x_smclas
)
2222 if (last_csect_name
)
2224 /* If no misc. function recorded in the last
2225 seen csect, enter it as a function. This
2226 will take care of functions like strcmp()
2229 if (!misc_func_recorded
)
2231 record_minimal_symbol
2232 (reader
, last_csect_name
, last_csect_val
,
2233 mst_text
, last_csect_sec
, objfile
);
2234 misc_func_recorded
= 1;
2239 /* We have to allocate one psymtab for
2240 each program csect, because their text
2241 sections need not be adjacent. */
2243 (objfile
, partial_symtabs
, pst
, psymtab_include_list
,
2244 includes_used
, symnum_before
, dependency_list
,
2245 dependencies_used
, textlow_not_set
);
2247 dependencies_used
= 0;
2248 /* Give all psymtabs for this source file the same
2250 pst
= xcoff_start_psymtab
2251 (partial_symtabs
, objfile
,
2256 /* Activate the misc_func_recorded mechanism for
2257 compiler- and linker-generated CSECTs like ".strcmp"
2259 if (namestring
&& (namestring
[0] == '.'
2260 || namestring
[0] == '@'))
2262 last_csect_name
= namestring
;
2263 last_csect_val
= symbol
.n_value
;
2264 last_csect_sec
= symbol
.n_scnum
;
2269 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2271 if (highval
> pst
->raw_text_high ())
2272 pst
->set_text_high (highval
);
2273 if (!pst
->text_low_valid
2274 || symbol
.n_value
< pst
->raw_text_low ())
2275 pst
->set_text_low (symbol
.n_value
);
2277 misc_func_recorded
= 0;
2282 /* Data variables are recorded in the minimal symbol
2283 table, except for section symbols. */
2284 if (*namestring
!= '.')
2285 record_minimal_symbol
2286 (reader
, namestring
, symbol
.n_value
,
2287 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2288 symbol
.n_scnum
, objfile
);
2293 warning (_("More than one XMC_TC0 symbol found."));
2294 toc_offset
= symbol
.n_value
;
2296 /* Make TOC offset relative to start address of
2298 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2300 toc_offset
-= bfd_section_vma (bfd_sect
);
2304 /* These symbols tell us where the TOC entry for a
2305 variable is, not the variable itself. */
2314 switch (csect_aux
.x_csect
.x_smclas
)
2317 /* A function entry point. */
2319 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2320 first_fun_line_offset
=
2321 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2323 record_minimal_symbol
2324 (reader
, namestring
, symbol
.n_value
,
2325 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2326 symbol
.n_scnum
, objfile
);
2327 misc_func_recorded
= 1;
2331 /* shared library function trampoline code entry
2334 /* record trampoline code entries as
2335 mst_solib_trampoline symbol. When we lookup mst
2336 symbols, we will choose mst_text over
2337 mst_solib_trampoline. */
2338 record_minimal_symbol
2339 (reader
, namestring
, symbol
.n_value
,
2340 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2341 misc_func_recorded
= 1;
2345 /* The symbols often have the same names as
2346 debug symbols for functions, and confuse
2352 /* xlc puts each variable in a separate csect,
2353 so we get an XTY_SD for each variable. But
2354 gcc puts several variables in a csect, so
2355 that each variable only gets an XTY_LD. We
2356 still need to record them. This will
2357 typically be XMC_RW; I suspect XMC_RO and
2358 XMC_BS might be possible too. */
2359 if (*namestring
!= '.')
2360 record_minimal_symbol
2361 (reader
, namestring
, symbol
.n_value
,
2362 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2363 symbol
.n_scnum
, objfile
);
2369 switch (csect_aux
.x_csect
.x_smclas
)
2373 /* Common variables are recorded in the minimal symbol
2374 table, except for section symbols. */
2375 if (*namestring
!= '.')
2376 record_minimal_symbol
2377 (reader
, namestring
, symbol
.n_value
,
2378 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2379 symbol
.n_scnum
, objfile
);
2391 unsigned int symnum_before
;
2393 symnum_before
= ssymnum
;
2394 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2397 /* See if the last csect needs to be recorded. */
2399 if (last_csect_name
&& !misc_func_recorded
)
2401 /* If no misc. function recorded in the last seen csect, enter
2402 it as a function. This will take care of functions like
2403 strcmp() compiled by xlc. */
2405 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2406 mst_text
, last_csect_sec
, objfile
);
2407 misc_func_recorded
= 1;
2412 xcoff_end_psymtab (objfile
, partial_symtabs
,
2413 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 (partial_symtabs
, 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 pst
->add_psymbol (gdb::string_view (namestring
,
2589 true, VAR_DOMAIN
, LOC_STATIC
,
2590 SECT_OFF_DATA (objfile
),
2591 psymbol_placement::STATIC
,
2594 partial_symtabs
, objfile
);
2598 /* The addresses in these entries are reported to be
2599 wrong. See the code that reads 'G's for symtabs. */
2600 pst
->add_psymbol (gdb::string_view (namestring
,
2602 true, VAR_DOMAIN
, LOC_STATIC
,
2603 SECT_OFF_DATA (objfile
),
2604 psymbol_placement::GLOBAL
,
2607 partial_symtabs
, objfile
);
2611 /* When a 'T' entry is defining an anonymous enum, it
2612 may have a name which is the empty string, or a
2613 single space. Since they're not really defining a
2614 symbol, those shouldn't go in the partial symbol
2615 table. We do pick up the elements of such enums at
2616 'check_enum:', below. */
2617 if (p
>= namestring
+ 2
2618 || (p
== namestring
+ 1
2619 && namestring
[0] != ' '))
2621 pst
->add_psymbol (gdb::string_view (namestring
,
2623 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2624 psymbol_placement::STATIC
,
2625 0, psymtab_language
,
2626 partial_symtabs
, objfile
);
2629 /* Also a typedef with the same name. */
2630 pst
->add_psymbol (gdb::string_view (namestring
,
2632 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2633 psymbol_placement::STATIC
,
2634 0, psymtab_language
,
2635 partial_symtabs
, objfile
);
2642 if (p
!= namestring
) /* a name is there, not just :T... */
2644 pst
->add_psymbol (gdb::string_view (namestring
,
2646 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2647 psymbol_placement::STATIC
,
2648 0, psymtab_language
,
2649 partial_symtabs
, objfile
);
2652 /* If this is an enumerated type, we need to
2653 add all the enum constants to the partial symbol
2654 table. This does not cover enums without names, e.g.
2655 "enum {a, b} c;" in C, but fortunately those are
2656 rare. There is no way for GDB to find those from the
2657 enum type without spending too much time on it. Thus
2658 to solve this problem, the compiler needs to put out the
2659 enum in a nameless type. GCC2 does this. */
2661 /* We are looking for something of the form
2662 <name> ":" ("t" | "T") [<number> "="] "e"
2663 {<constant> ":" <value> ","} ";". */
2665 /* Skip over the colon and the 't' or 'T'. */
2667 /* This type may be given a number. Also, numbers can come
2668 in pairs like (0,26). Skip over it. */
2669 while ((*p
>= '0' && *p
<= '9')
2670 || *p
== '(' || *p
== ',' || *p
== ')'
2676 /* The aix4 compiler emits extra crud before the
2680 /* Skip over the type (?). */
2684 /* Skip over the colon. */
2688 /* We have found an enumerated type. */
2689 /* According to comments in read_enum_type
2690 a comma could end it instead of a semicolon.
2691 I don't know where that happens.
2693 while (*p
&& *p
!= ';' && *p
!= ',')
2697 /* Check for and handle cretinous dbx symbol name
2699 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2700 p
= next_symbol_text (objfile
);
2702 /* Point to the character after the name
2703 of the enum constant. */
2704 for (q
= p
; *q
&& *q
!= ':'; q
++)
2706 /* Note that the value doesn't matter for
2707 enum constants in psymtabs, just in symtabs. */
2708 pst
->add_psymbol (gdb::string_view (p
, q
- p
), true,
2709 VAR_DOMAIN
, LOC_CONST
, -1,
2710 psymbol_placement::STATIC
,
2711 0, psymtab_language
,
2712 partial_symtabs
, objfile
);
2713 /* Point past the name. */
2715 /* Skip over the value. */
2716 while (*p
&& *p
!= ',')
2718 /* Advance past the comma. */
2726 /* Constant, e.g. from "const" in Pascal. */
2727 pst
->add_psymbol (gdb::string_view (namestring
,
2729 true, VAR_DOMAIN
, LOC_CONST
, -1,
2730 psymbol_placement::STATIC
,
2731 0, psymtab_language
,
2732 partial_symtabs
, objfile
);
2738 std::string
name (namestring
, (p
- namestring
));
2739 function_outside_compilation_unit_complaint (name
.c_str ());
2741 pst
->add_psymbol (gdb::string_view (namestring
,
2743 true, VAR_DOMAIN
, LOC_BLOCK
,
2744 SECT_OFF_TEXT (objfile
),
2745 psymbol_placement::STATIC
,
2748 partial_symtabs
, objfile
);
2751 /* Global functions were ignored here, but now they
2752 are put into the global psymtab like one would expect.
2753 They're also in the minimal symbol table. */
2757 std::string
name (namestring
, (p
- namestring
));
2758 function_outside_compilation_unit_complaint (name
.c_str ());
2761 /* We need only the minimal symbols for these
2762 loader-generated definitions. Keeping the global
2763 symbols leads to "in psymbols but not in symbols"
2765 if (startswith (namestring
, "@FIX"))
2768 pst
->add_psymbol (gdb::string_view (namestring
,
2770 true, VAR_DOMAIN
, LOC_BLOCK
,
2771 SECT_OFF_TEXT (objfile
),
2772 psymbol_placement::GLOBAL
,
2775 partial_symtabs
, objfile
);
2778 /* Two things show up here (hopefully); static symbols of
2779 local scope (static used inside braces) or extensions
2780 of structure symbols. We can ignore both. */
2794 case '#': /* For symbol identification (used in
2799 /* It is a C++ nested symbol. We don't need to record it
2800 (I don't think); if we try to look up foo::bar::baz,
2801 then symbols for the symtab containing foo should get
2802 read in, I think. */
2803 /* Someone says sun cc puts out symbols like
2804 /foo/baz/maclib::/usr/local/bin/maclib,
2805 which would get here with a symbol type of ':'. */
2809 /* Unexpected symbol descriptor. The second and
2810 subsequent stabs of a continued stab can show up
2811 here. The question is whether they ever can mimic
2812 a normal stab--it would be nice if not, since we
2813 certainly don't want to spend the time searching to
2814 the end of every string looking for a
2817 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2819 /* Ignore it; perhaps it is an extension that we don't
2829 xcoff_end_psymtab (objfile
, partial_symtabs
,
2830 pst
, psymtab_include_list
, includes_used
,
2831 ssymnum
, dependency_list
,
2832 dependencies_used
, textlow_not_set
);
2835 /* Record the toc offset value of this symbol table into objfile
2836 structure. If no XMC_TC0 is found, toc_offset should be zero.
2837 Another place to obtain this information would be file auxiliary
2840 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2843 /* Return the toc offset value for a given objfile. */
2846 xcoff_get_toc_offset (struct objfile
*objfile
)
2849 return XCOFF_DATA (objfile
)->toc_offset
;
2853 /* Scan and build partial symbols for a symbol file.
2854 We have been initialized by a call to dbx_symfile_init, which
2855 put all the relevant info into a "struct dbx_symfile_info",
2856 hung off the objfile structure.
2858 SECTION_OFFSETS contains offsets relative to which the symbols in the
2859 various sections are (depending where the sections were actually
2863 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2867 int num_symbols
; /* # of symbols */
2868 file_ptr symtab_offset
; /* symbol table and */
2869 file_ptr stringtab_offset
; /* string table file offsets */
2870 struct xcoff_symfile_info
*info
;
2874 info
= XCOFF_DATA (objfile
);
2875 symfile_bfd
= abfd
= objfile
->obfd
;
2876 name
= objfile_name (objfile
);
2878 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2879 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2880 stringtab_offset
= symtab_offset
+
2881 num_symbols
* coff_data (abfd
)->local_symesz
;
2883 info
->min_lineno_offset
= 0;
2884 info
->max_lineno_offset
= 0;
2885 bfd_map_over_sections (abfd
, find_linenos
, info
);
2887 if (num_symbols
> 0)
2889 /* Read the string table. */
2890 init_stringtab (abfd
, stringtab_offset
, objfile
);
2892 /* Read the .debug section, if present and if we're not ignoring
2894 if (!(objfile
->flags
& OBJF_READNEVER
))
2896 struct bfd_section
*secp
;
2897 bfd_size_type length
;
2898 bfd_byte
*debugsec
= NULL
;
2900 secp
= bfd_get_section_by_name (abfd
, ".debug");
2903 length
= bfd_section_size (secp
);
2907 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2910 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2912 error (_("Error reading .debug section of `%s': %s"),
2913 name
, bfd_errmsg (bfd_get_error ()));
2917 info
->debugsec
= (char *) debugsec
;
2921 /* Read the symbols. We keep them in core because we will want to
2922 access them randomly in read_symbol*. */
2923 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2925 error (_("Error reading symbols from %s: %s"),
2926 name
, bfd_errmsg (bfd_get_error ()));
2927 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2928 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2929 info
->symtbl_num_syms
= num_symbols
;
2931 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2933 perror_with_name (_("reading symbol table"));
2935 scoped_free_pendings free_pending
;
2936 minimal_symbol_reader
reader (objfile
);
2938 /* Now that the symbol table data of the executable file are all in core,
2939 process them and define symbols accordingly. */
2941 psymbol_functions
*psf
= new psymbol_functions ();
2942 psymtab_storage
*partial_symtabs
= psf
->get_partial_symtabs ().get ();
2943 objfile
->qf
.emplace_front (psf
);
2944 scan_xcoff_symtab (reader
, partial_symtabs
, objfile
);
2946 /* Install any minimal symbols that have been collected as the current
2947 minimal symbols for this objfile. */
2951 /* DWARF2 sections. */
2953 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2954 dwarf2_build_psymtabs (objfile
);
2956 dwarf2_build_frame_info (objfile
);
2960 xcoff_symfile_offsets (struct objfile
*objfile
,
2961 const section_addr_info
&addrs
)
2963 const char *first_section_name
;
2965 default_symfile_offsets (objfile
, addrs
);
2967 /* Oneof the weird side-effects of default_symfile_offsets is that
2968 it sometimes sets some section indices to zero for sections that,
2969 in fact do not exist. See the body of default_symfile_offsets
2970 for more info on when that happens. Undo that, as this then allows
2971 us to test whether the associated section exists or not, and then
2972 access it quickly (without searching it again). */
2974 if (objfile
->section_offsets
.empty ())
2975 return; /* Is that even possible? Better safe than sorry. */
2977 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2979 if (objfile
->sect_index_text
== 0
2980 && strcmp (first_section_name
, ".text") != 0)
2981 objfile
->sect_index_text
= -1;
2983 if (objfile
->sect_index_data
== 0
2984 && strcmp (first_section_name
, ".data") != 0)
2985 objfile
->sect_index_data
= -1;
2987 if (objfile
->sect_index_bss
== 0
2988 && strcmp (first_section_name
, ".bss") != 0)
2989 objfile
->sect_index_bss
= -1;
2991 if (objfile
->sect_index_rodata
== 0
2992 && strcmp (first_section_name
, ".rodata") != 0)
2993 objfile
->sect_index_rodata
= -1;
2996 /* Register our ability to parse symbols for xcoff BFD files. */
2998 static const struct sym_fns xcoff_sym_fns
=
3001 /* It is possible that coff and xcoff should be merged as
3002 they do have fundamental similarities (for example, the extra storage
3003 classes used for stabs could presumably be recognized in any COFF file).
3004 However, in addition to obvious things like all the csect hair, there are
3005 some subtler differences between xcoffread.c and coffread.c, notably
3006 the fact that coffread.c has no need to read in all the symbols, but
3007 xcoffread.c reads all the symbols and does in fact randomly access them
3008 (in C_BSTAT and line number processing). */
3010 xcoff_new_init
, /* init anything gbl to entire symtab */
3011 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3012 xcoff_initial_scan
, /* read a symbol file into symtab */
3013 xcoff_symfile_finish
, /* finished with file, cleanup */
3014 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3015 default_symfile_segments
, /* Get segment information from a file. */
3016 aix_process_linenos
,
3017 default_symfile_relocate
, /* Relocate a debug section. */
3018 NULL
, /* sym_probe_fns */
3021 /* Same as xcoff_get_n_import_files, but for core files. */
3024 xcoff_get_core_n_import_files (bfd
*abfd
)
3026 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3028 file_ptr offset
= 0;
3032 return -1; /* Not a core file. */
3034 for (offset
= 0; offset
< bfd_section_size (sect
);)
3040 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3042 next
= bfd_get_32 (abfd
, buf
);
3044 break; /* This is the last entry. */
3048 /* Return the number of entries, excluding the first one, which is
3049 the path to the executable that produced this core file. */
3050 return n_entries
- 1;
3053 /* Return the number of import files (shared libraries) that the given
3054 BFD depends on. Return -1 if this number could not be computed. */
3057 xcoff_get_n_import_files (bfd
*abfd
)
3059 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3063 /* If the ".loader" section does not exist, the objfile is probably
3064 not an executable. Might be a core file... */
3066 return xcoff_get_core_n_import_files (abfd
);
3068 /* The number of entries in the Import Files Table is stored in
3069 field l_nimpid. This field is always at offset 16, and is
3070 always 4 bytes long. Read those 4 bytes. */
3072 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3074 l_nimpid
= bfd_get_32 (abfd
, buf
);
3076 /* By convention, the first entry is the default LIBPATH value
3077 to be used by the system loader, so it does not count towards
3078 the number of import files. */
3079 return l_nimpid
- 1;
3082 void _initialize_xcoffread ();
3084 _initialize_xcoffread ()
3086 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);