1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2021 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_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_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_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_symtab (cur_src_end_addr
,
1134 SECT_OFF_TEXT (objfile
));
1139 start_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_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1227 /* Give all csects for this source file the same
1229 start_symtab (objfile
, filestring
, NULL
,
1230 0, pst_symtab_language
);
1231 record_debugformat (debugfmt
);
1234 /* If this is the very first csect seen,
1235 basically `__start'. */
1238 first_object_file_end
1239 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1244 cs
->c_value
+ objfile
->text_section_offset ();
1245 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1247 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1248 last_csect_name
= cs
->c_name
;
1252 /* All other symbols are put into the minimal symbol
1265 /* Ignore the symbol. */
1273 switch (CSECT_SCLAS (&main_aux
))
1275 /* We never really come to this part as this case has been
1276 handled in ISFCN check above.
1277 This and other cases of XTY_LD are kept just for
1283 /* shared library function trampoline code entry point. */
1287 /* The symbols often have the same names as debug symbols for
1288 functions, and confuse lookup_symbol. */
1292 /* xlc puts each variable in a separate csect, so we get
1293 an XTY_SD for each variable. But gcc puts several
1294 variables in a csect, so that each variable only gets
1295 an XTY_LD. This will typically be XMC_RW; I suspect
1296 XMC_RO and XMC_BS might be possible too.
1297 These variables are put in the minimal symbol table
1304 /* Common symbols are put into the minimal symbol table only. */
1312 switch (cs
->c_sclass
)
1316 /* c_value field contains symnum of next .file entry in table
1317 or symnum of first global after last .file. */
1319 next_file_symnum
= cs
->c_value
;
1321 /* Complete symbol table for last object file containing
1322 debugging information. */
1324 /* Whether or not there was a csect in the previous file, we
1325 have to call `end_stabs' and `start_stabs' to reset
1326 type_vector, line_vector, etc. structures. */
1328 complete_symtab (filestring
, file_start_addr
);
1329 cur_src_end_addr
= file_end_addr
;
1330 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1333 /* XCOFF, according to the AIX 3.2 documentation, puts the
1334 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1335 do things the standard COFF way and put it in the auxent.
1336 We use the auxent if the symbol is ".file" and an auxent
1337 exists, otherwise use the symbol itself. Simple
1339 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1341 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1342 0, cs
->c_naux
, &main_aux
);
1343 filestring
= coff_getfilename (&main_aux
, objfile
);
1346 filestring
= cs
->c_name
;
1349 start_symtab (objfile
, filestring
, NULL
, 0, pst_symtab_language
);
1350 record_debugformat (debugfmt
);
1351 last_csect_name
= 0;
1353 /* reset file start and end addresses. A compilation unit
1354 with no text (only data) should have zero file
1356 file_start_addr
= file_end_addr
= 0;
1360 fcn_stab_saved
= *cs
;
1364 if (strcmp (cs
->c_name
, ".bf") == 0)
1366 CORE_ADDR off
= objfile
->text_section_offset ();
1368 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1369 0, cs
->c_naux
, &main_aux
);
1371 within_function
= 1;
1373 newobj
= push_context (0, fcn_start_addr
+ off
);
1375 newobj
->name
= define_symbol
1376 (fcn_cs_saved
.c_value
+ off
,
1377 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1378 if (newobj
->name
!= NULL
)
1379 newobj
->name
->set_section_index (SECT_OFF_TEXT (objfile
));
1381 else if (strcmp (cs
->c_name
, ".ef") == 0)
1383 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1384 0, cs
->c_naux
, &main_aux
);
1386 /* The value of .ef is the address of epilogue code;
1387 not useful for gdb. */
1388 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1389 contains number of lines to '}' */
1391 if (outermost_context_p ())
1392 { /* We attempted to pop an empty context stack. */
1393 ef_complaint (cs
->c_symnum
);
1394 within_function
= 0;
1397 struct context_stack cstk
= pop_context ();
1398 /* Stack must be empty now. */
1399 if (!outermost_context_p ())
1401 ef_complaint (cs
->c_symnum
);
1402 within_function
= 0;
1406 finish_block (cstk
.name
, cstk
.old_blocks
,
1407 NULL
, cstk
.start_addr
,
1408 (fcn_cs_saved
.c_value
1409 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1410 + objfile
->text_section_offset ()));
1411 within_function
= 0;
1416 /* Begin static block. */
1418 struct internal_syment static_symbol
;
1420 read_symbol (&static_symbol
, cs
->c_value
);
1421 static_block_base
= static_symbol
.n_value
;
1422 static_block_section
=
1423 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1428 /* End of static block. */
1429 static_block_base
= 0;
1430 static_block_section
= -1;
1441 complaint (_("Unrecognized storage class %d."),
1456 /* beginning of include file */
1457 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1458 order. Thus, when wee see them, we might not know enough info
1459 to process them. Thus, we'll be saving them into a table
1460 (inclTable) and postpone their processing. */
1462 record_include_begin (cs
);
1466 /* End of include file. */
1467 /* See the comment after case C_BINCL. */
1468 record_include_end (cs
);
1472 if (strcmp (cs
->c_name
, ".bb") == 0)
1475 newobj
= push_context (depth
,
1477 + objfile
->text_section_offset ()));
1479 else if (strcmp (cs
->c_name
, ".eb") == 0)
1481 if (outermost_context_p ())
1482 { /* We attempted to pop an empty context stack. */
1483 eb_complaint (cs
->c_symnum
);
1486 struct context_stack cstk
= pop_context ();
1487 if (depth
-- != cstk
.depth
)
1489 eb_complaint (cs
->c_symnum
);
1492 if (*get_local_symbols () && !outermost_context_p ())
1494 /* Make a block for the local symbols within. */
1495 finish_block (cstk
.name
,
1496 cstk
.old_blocks
, NULL
,
1499 + objfile
->text_section_offset ()));
1501 *get_local_symbols () = cstk
.locals
;
1506 process_xcoff_symbol (cs
, objfile
);
1511 if (get_last_source_file ())
1513 struct compunit_symtab
*cust
;
1515 complete_symtab (filestring
, file_start_addr
);
1516 cur_src_end_addr
= file_end_addr
;
1517 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1518 /* When reading symbols for the last C_FILE of the objfile, try
1519 to make sure that we set pst->compunit_symtab to the symtab for the
1520 file, not to the _globals_ symtab. I'm not sure whether this
1521 actually works right or when/if it comes up. */
1522 if (pst
->compunit_symtab
== NULL
)
1523 pst
->compunit_symtab
= cust
;
1528 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1529 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1533 /* process one xcoff symbol. */
1535 static struct symbol
*
1536 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1538 struct symbol onesymbol
;
1539 struct symbol
*sym
= &onesymbol
;
1540 struct symbol
*sym2
= NULL
;
1546 if (cs
->c_secnum
< 0)
1548 /* The value is a register number, offset within a frame, etc.,
1549 and does not get relocated. */
1555 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1556 off
= objfile
->section_offsets
[sec
];
1563 /* default assumptions */
1564 SET_SYMBOL_VALUE_ADDRESS (sym
, cs
->c_value
+ off
);
1565 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1566 sym
->set_section_index (secnum_to_section (cs
->c_secnum
, objfile
));
1568 if (ISFCN (cs
->c_type
))
1570 /* At this point, we don't know the type of the function. This
1571 will be patched with the type from its stab entry later on in
1572 patch_block_stabs (), unless the file was compiled without -g. */
1574 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1575 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1577 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1578 sym2
= new (&objfile
->objfile_obstack
) symbol (*sym
);
1580 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1581 add_symbol_to_list (sym2
, get_global_symbols ());
1582 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1583 add_symbol_to_list (sym2
, get_file_symbols ());
1587 /* In case we can't figure out the type, provide default. */
1588 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1590 switch (cs
->c_sclass
)
1593 /* The values of functions and global symbols are now resolved
1594 via the global_sym_chain in stabsread.c. */
1596 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1597 add_stab_to_list (name
, &global_stabs
);
1599 add_stab_to_list (name
, &file_stabs
);
1603 add_stab_to_list (name
, &global_stabs
);
1608 common_block_start (cs
->c_name
, objfile
);
1612 common_block_end (objfile
);
1616 complaint (_("Unexpected storage class: %d"),
1629 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1632 sym
->set_section_index (sec
);
1639 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1640 all statics and we need to distinguish file-scope versus
1641 function-scope using within_function. We do this by
1642 changing the string we pass to define_symbol to use 'S'
1643 where we need to, which is not necessarily super-clean,
1644 but seems workable enough. */
1649 pp
= strchr (name
, ':');
1654 if (*pp
== 'V' && !within_function
)
1656 sym
= define_symbol ((cs
->c_value
1657 + objfile
->section_offsets
[static_block_section
]),
1658 cs
->c_name
, 0, 0, objfile
);
1661 SET_SYMBOL_VALUE_ADDRESS (sym
,
1662 SYMBOL_VALUE_ADDRESS (sym
)
1663 + static_block_base
);
1664 sym
->set_section_index (static_block_section
);
1673 /* Extract the file name from the aux entry of a C_FILE symbol.
1674 Result is in static storage and is only good for temporary use. */
1677 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1679 static char buffer
[BUFSIZ
];
1681 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1682 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1683 + aux_entry
->x_file
.x_n
.x_offset
));
1686 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1687 buffer
[FILNMLEN
] = '\0';
1692 /* Set *SYMBOL to symbol number symno in symtbl. */
1694 read_symbol (struct internal_syment
*symbol
, int symno
)
1696 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1697 int nsyms
= xcoff
->symtbl_num_syms
;
1698 char *stbl
= xcoff
->symtbl
;
1700 if (symno
< 0 || symno
>= nsyms
)
1702 complaint (_("Invalid symbol offset"));
1703 symbol
->n_value
= 0;
1704 symbol
->n_scnum
= -1;
1707 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1708 stbl
+ (symno
* local_symesz
),
1712 /* Get value corresponding to symbol number symno in symtbl. */
1715 read_symbol_nvalue (int symno
)
1717 struct internal_syment symbol
[1];
1719 read_symbol (symbol
, symno
);
1720 return symbol
->n_value
;
1724 /* Find the address of the function corresponding to symno, where
1725 symno is the symbol pointed to by the linetable. */
1728 read_symbol_lineno (int symno
)
1730 struct objfile
*objfile
= this_symtab_objfile
;
1731 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1733 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1734 int nsyms
= info
->symtbl_num_syms
;
1735 char *stbl
= info
->symtbl
;
1736 char *strtbl
= info
->strtbl
;
1738 struct internal_syment symbol
[1];
1739 union internal_auxent main_aux
[1];
1743 bf_notfound_complaint ();
1747 /* Note that just searching for a short distance (e.g. 50 symbols)
1748 is not enough, at least in the following case.
1751 [many .stabx entries]
1752 [a few functions, referring to foo]
1756 What happens here is that the assembler moves the .stabx entries
1757 to right before the ".bf" for foo, but the symbol for "foo" is before
1758 all the stabx entries. See PR gdb/2222. */
1760 /* Maintaining a table of .bf entries might be preferable to this search.
1761 If I understand things correctly it would need to be done only for
1762 the duration of a single psymtab to symtab conversion. */
1763 while (symno
< nsyms
)
1765 bfd_coff_swap_sym_in (symfile_bfd
,
1766 stbl
+ (symno
* local_symesz
), symbol
);
1767 if (symbol
->n_sclass
== C_FCN
)
1769 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1771 if (strcmp (name
, ".bf") == 0)
1774 symno
+= symbol
->n_numaux
+ 1;
1777 bf_notfound_complaint ();
1781 /* Take aux entry and return its lineno. */
1783 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1784 symbol
->n_type
, symbol
->n_sclass
,
1785 0, symbol
->n_numaux
, main_aux
);
1787 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1790 /* Support for line number handling. */
1792 /* This function is called for every section; it finds the outer limits
1793 * of the line table (minimum and maximum file offset) so that the
1794 * mainline code can read the whole thing for efficiency.
1797 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1799 struct xcoff_symfile_info
*info
;
1801 file_ptr offset
, maxoff
;
1803 count
= asect
->lineno_count
;
1805 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1808 size
= count
* coff_data (abfd
)->local_linesz
;
1809 info
= (struct xcoff_symfile_info
*) vpinfo
;
1810 offset
= asect
->line_filepos
;
1811 maxoff
= offset
+ size
;
1813 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1814 info
->min_lineno_offset
= offset
;
1816 if (maxoff
> info
->max_lineno_offset
)
1817 info
->max_lineno_offset
= maxoff
;
1821 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1823 gdb_assert (!pst
->readin
);
1825 /* Read in all partial symtabs on which this one is dependent. */
1826 pst
->expand_dependencies (objfile
);
1828 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1830 /* Init stuff necessary for reading in symbols. */
1833 scoped_free_pendings free_pending
;
1834 read_xcoff_symtab (objfile
, pst
);
1840 /* Read in all of the symbols for a given psymtab for real.
1841 Be verbose about it if the user wants that. SELF is not NULL. */
1844 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1846 gdb_assert (!self
->readin
);
1848 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1849 || self
->number_of_dependencies
)
1851 next_symbol_text_func
= xcoff_next_symbol_text
;
1853 self
->expand_psymtab (objfile
);
1855 /* Match with global symbols. This only needs to be done once,
1856 after all of the symtabs and dependencies have been read in. */
1857 scan_file_globals (objfile
);
1862 xcoff_new_init (struct objfile
*objfile
)
1864 stabsread_new_init ();
1867 /* Do initialization in preparation for reading symbols from OBJFILE.
1869 We will only be called if this is an XCOFF or XCOFF-like file.
1870 BFD handles figuring out the format of the file, and code in symfile.c
1871 uses BFD's determination to vector to us. */
1874 xcoff_symfile_init (struct objfile
*objfile
)
1876 /* Allocate struct to keep track of the symfile. */
1877 xcoff_objfile_data_key
.emplace (objfile
);
1879 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1880 find this causes a significant slowdown in gdb then we could
1881 set it in the debug symbol readers only when necessary. */
1882 objfile
->flags
|= OBJF_REORDERED
;
1885 /* Perform any local cleanups required when we are done with a particular
1886 objfile. I.E, we are in the process of discarding all symbol information
1887 for an objfile, freeing up all memory held for it, and unlinking the
1888 objfile struct from the global list of known objfiles. */
1891 xcoff_symfile_finish (struct objfile
*objfile
)
1893 /* Start with a fresh include table for the next objfile. */
1899 inclIndx
= inclLength
= inclDepth
= 0;
1904 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1908 unsigned char lengthbuf
[4];
1910 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1912 xcoff
->strtbl
= NULL
;
1914 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1915 error (_("cannot seek to string table in %s: %s"),
1916 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1918 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1919 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1921 /* If no string table is needed, then the file may end immediately
1922 after the symbols. Just return with `strtbl' set to NULL. */
1924 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1927 /* Allocate string table from objfile_obstack. We will need this table
1928 as long as we have its symbol table around. */
1930 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1931 xcoff
->strtbl
= strtbl
;
1933 /* Copy length buffer, the first byte is usually zero and is
1934 used for stabs with a name length of zero. */
1935 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1936 if (length
== sizeof lengthbuf
)
1939 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1941 if (val
!= length
- sizeof lengthbuf
)
1942 error (_("cannot read string table from %s: %s"),
1943 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1944 if (strtbl
[length
- 1] != '\0')
1945 error (_("bad symbol file: string table "
1946 "does not end with null character"));
1951 /* If we have not yet seen a function for this psymtab, this is 0. If we
1952 have seen one, it is the offset in the line numbers of the line numbers
1954 static unsigned int first_fun_line_offset
;
1956 /* Allocate and partially fill a partial symtab. It will be
1957 completely filled at the end of the symbol list.
1959 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1960 is the address relative to which its symbols are (incremental) or 0
1963 static legacy_psymtab
*
1964 xcoff_start_psymtab (psymtab_storage
*partial_symtabs
,
1965 struct objfile
*objfile
,
1966 const char *filename
, int first_symnum
)
1968 /* We fill in textlow later. */
1969 legacy_psymtab
*result
= new legacy_psymtab (filename
, partial_symtabs
,
1970 objfile
->per_bfd
, 0);
1972 result
->read_symtab_private
=
1973 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1974 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1975 result
->legacy_read_symtab
= xcoff_read_symtab
;
1976 result
->legacy_expand_psymtab
= xcoff_expand_psymtab
;
1978 /* Deduce the source language from the filename for this psymtab. */
1979 psymtab_language
= deduce_language_from_filename (filename
);
1984 /* Close off the current usage of PST.
1985 Returns PST, or NULL if the partial symtab was empty and thrown away.
1987 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1989 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1990 are the information for includes and dependencies. */
1992 static legacy_psymtab
*
1993 xcoff_end_psymtab (struct objfile
*objfile
, psymtab_storage
*partial_symtabs
,
1994 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;
2012 pst
->number_of_dependencies
= number_dependencies
;
2013 if (number_dependencies
)
2016 = 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
], partial_symtabs
, objfile
->per_bfd
);
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 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
2047 /* Throw away this psymtab, it's empty. */
2048 /* Empty psymtabs happen as a result of header files which don't have
2049 any symbols in them. There can be a lot of them. */
2051 partial_symtabs
->discard_psymtab (pst
);
2053 /* Indicate that psymtab was thrown away. */
2059 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2060 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2061 the symbol and its auxents. */
2064 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2065 const char **name
, char **raw
, unsigned int *symnump
,
2066 struct objfile
*objfile
)
2068 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2069 if (symbol
->n_zeroes
)
2071 /* If it's exactly E_SYMNMLEN characters long it isn't
2073 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2075 /* FIXME: wastes memory for symbols which we don't end up putting
2076 into the minimal symbols. */
2079 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2081 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2082 p
[E_SYMNMLEN
] = '\0';
2086 /* Point to the unswapped name as that persists as long as the
2088 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2090 else if (symbol
->n_sclass
& 0x80)
2092 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2096 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2099 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2100 if (symbol
->n_numaux
> 0)
2102 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2103 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2105 *symnump
+= symbol
->n_numaux
;
2106 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2111 function_outside_compilation_unit_complaint (const char *arg1
)
2113 complaint (_("function `%s' appears to be defined "
2114 "outside of all compilation units"),
2119 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2120 psymtab_storage
*partial_symtabs
,
2121 struct objfile
*objfile
)
2123 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2124 const char *filestring
= NULL
;
2126 const char *namestring
;
2131 /* Current partial symtab */
2132 legacy_psymtab
*pst
;
2134 /* List of current psymtab's include files. */
2135 const char **psymtab_include_list
;
2136 int includes_allocated
;
2139 /* Index within current psymtab dependency list. */
2140 legacy_psymtab
**dependency_list
;
2141 int dependencies_used
, dependencies_allocated
;
2144 struct internal_syment symbol
;
2145 union internal_auxent main_aux
[5];
2146 unsigned int ssymnum
;
2148 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2149 CORE_ADDR last_csect_val
= 0;
2150 int last_csect_sec
= 0;
2151 int misc_func_recorded
= 0; /* true if any misc. function. */
2152 int textlow_not_set
= 1;
2154 pst
= (legacy_psymtab
*) 0;
2156 includes_allocated
= 30;
2158 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2159 sizeof (const char *));
2161 dependencies_allocated
= 30;
2162 dependencies_used
= 0;
2164 (legacy_psymtab
**) alloca (dependencies_allocated
*
2165 sizeof (legacy_psymtab
*));
2167 set_last_source_file (NULL
);
2169 abfd
= objfile
->obfd
;
2170 next_symbol_text_func
= xcoff_next_symbol_text
;
2172 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2173 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2175 while (ssymnum
< nsyms
)
2181 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2182 sclass
= symbol
.n_sclass
;
2190 /* The CSECT auxent--always the last auxent. */
2191 union internal_auxent csect_aux
;
2192 unsigned int symnum_before
= ssymnum
;
2194 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2196 if (symbol
.n_numaux
> 1)
2198 bfd_coff_swap_aux_in
2200 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2203 symbol
.n_numaux
- 1,
2208 csect_aux
= main_aux
[0];
2210 /* If symbol name starts with ".$" or "$", ignore it. */
2211 if (namestring
[0] == '$'
2212 || (namestring
[0] == '.' && namestring
[1] == '$'))
2215 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2218 switch (csect_aux
.x_csect
.x_smclas
)
2221 if (last_csect_name
)
2223 /* If no misc. function recorded in the last
2224 seen csect, enter it as a function. This
2225 will take care of functions like strcmp()
2228 if (!misc_func_recorded
)
2230 record_minimal_symbol
2231 (reader
, last_csect_name
, last_csect_val
,
2232 mst_text
, last_csect_sec
, objfile
);
2233 misc_func_recorded
= 1;
2238 /* We have to allocate one psymtab for
2239 each program csect, because their text
2240 sections need not be adjacent. */
2242 (objfile
, partial_symtabs
, pst
, psymtab_include_list
,
2243 includes_used
, symnum_before
, dependency_list
,
2244 dependencies_used
, textlow_not_set
);
2246 dependencies_used
= 0;
2247 /* Give all psymtabs for this source file the same
2249 pst
= xcoff_start_psymtab
2250 (partial_symtabs
, objfile
,
2255 /* Activate the misc_func_recorded mechanism for
2256 compiler- and linker-generated CSECTs like ".strcmp"
2258 if (namestring
&& (namestring
[0] == '.'
2259 || namestring
[0] == '@'))
2261 last_csect_name
= namestring
;
2262 last_csect_val
= symbol
.n_value
;
2263 last_csect_sec
= symbol
.n_scnum
;
2268 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2270 if (highval
> pst
->raw_text_high ())
2271 pst
->set_text_high (highval
);
2272 if (!pst
->text_low_valid
2273 || symbol
.n_value
< pst
->raw_text_low ())
2274 pst
->set_text_low (symbol
.n_value
);
2276 misc_func_recorded
= 0;
2281 /* Data variables are recorded in the minimal symbol
2282 table, except for section symbols. */
2283 if (*namestring
!= '.')
2284 record_minimal_symbol
2285 (reader
, namestring
, symbol
.n_value
,
2286 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2287 symbol
.n_scnum
, objfile
);
2292 warning (_("More than one XMC_TC0 symbol found."));
2293 toc_offset
= symbol
.n_value
;
2295 /* Make TOC offset relative to start address of
2297 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2299 toc_offset
-= bfd_section_vma (bfd_sect
);
2303 /* These symbols tell us where the TOC entry for a
2304 variable is, not the variable itself. */
2313 switch (csect_aux
.x_csect
.x_smclas
)
2316 /* A function entry point. */
2318 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2319 first_fun_line_offset
=
2320 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2322 record_minimal_symbol
2323 (reader
, namestring
, symbol
.n_value
,
2324 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2325 symbol
.n_scnum
, objfile
);
2326 misc_func_recorded
= 1;
2330 /* shared library function trampoline code entry
2333 /* record trampoline code entries as
2334 mst_solib_trampoline symbol. When we lookup mst
2335 symbols, we will choose mst_text over
2336 mst_solib_trampoline. */
2337 record_minimal_symbol
2338 (reader
, namestring
, symbol
.n_value
,
2339 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2340 misc_func_recorded
= 1;
2344 /* The symbols often have the same names as
2345 debug symbols for functions, and confuse
2351 /* xlc puts each variable in a separate csect,
2352 so we get an XTY_SD for each variable. But
2353 gcc puts several variables in a csect, so
2354 that each variable only gets an XTY_LD. We
2355 still need to record them. This will
2356 typically be XMC_RW; I suspect XMC_RO and
2357 XMC_BS might be possible too. */
2358 if (*namestring
!= '.')
2359 record_minimal_symbol
2360 (reader
, namestring
, symbol
.n_value
,
2361 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2362 symbol
.n_scnum
, objfile
);
2368 switch (csect_aux
.x_csect
.x_smclas
)
2372 /* Common variables are recorded in the minimal symbol
2373 table, except for section symbols. */
2374 if (*namestring
!= '.')
2375 record_minimal_symbol
2376 (reader
, namestring
, symbol
.n_value
,
2377 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2378 symbol
.n_scnum
, objfile
);
2390 unsigned int symnum_before
;
2392 symnum_before
= ssymnum
;
2393 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2396 /* See if the last csect needs to be recorded. */
2398 if (last_csect_name
&& !misc_func_recorded
)
2400 /* If no misc. function recorded in the last seen csect, enter
2401 it as a function. This will take care of functions like
2402 strcmp() compiled by xlc. */
2404 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2405 mst_text
, last_csect_sec
, objfile
);
2406 misc_func_recorded
= 1;
2411 xcoff_end_psymtab (objfile
, partial_symtabs
,
2412 pst
, psymtab_include_list
,
2413 includes_used
, symnum_before
,
2414 dependency_list
, dependencies_used
,
2417 dependencies_used
= 0;
2419 first_fun_line_offset
= 0;
2421 /* XCOFF, according to the AIX 3.2 documentation, puts the
2422 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2423 do things the standard COFF way and put it in the auxent.
2424 We use the auxent if the symbol is ".file" and an auxent
2425 exists, otherwise use the symbol itself. */
2426 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2428 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2431 filestring
= namestring
;
2433 pst
= xcoff_start_psymtab (partial_symtabs
, objfile
,
2436 last_csect_name
= NULL
;
2442 complaint (_("Storage class %d not recognized during scan"),
2448 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2449 to handle only the C_FUN and C_EXT. */
2463 /* C_EINCL means we are switching back to the main file. But there
2464 is no reason to care; the only thing we want to know about
2465 includes is the names of all the included (.h) files. */
2470 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2474 /* I don't think the name of the common block (as opposed to the
2475 variables within it) is something which is user visible
2483 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2484 so C_LSYM would appear to be only for locals. */
2490 /* We probably could save a few instructions by assuming that
2491 C_LSYM, C_PSYM, etc., never have auxents. */
2492 int naux1
= symbol
.n_numaux
+ 1;
2495 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2501 /* Mark down an include file in the current psymtab. */
2502 enum language tmp_language
;
2504 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2507 tmp_language
= deduce_language_from_filename (namestring
);
2509 /* Only change the psymtab's language if we've learned
2510 something useful (eg. tmp_language is not language_unknown).
2511 In addition, to match what start_subfile does, never change
2513 if (tmp_language
!= language_unknown
2514 && (tmp_language
!= language_c
2515 || psymtab_language
!= language_cplus
))
2516 psymtab_language
= tmp_language
;
2518 /* In C++, one may expect the same filename to come round many
2519 times, when code is coming alternately from the main file
2520 and from inline functions in other files. So I check to see
2521 if this is a file we've seen before -- either the main
2522 source file, or a previously included file.
2524 This seems to be a lot of time to be spending on N_SOL, but
2525 things like "break c-exp.y:435" need to work (I
2526 suppose the psymtab_include_list could be hashed or put
2527 in a binary tree, if profiling shows this is a major hog). */
2528 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2534 for (i
= 0; i
< includes_used
; i
++)
2535 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2543 psymtab_include_list
[includes_used
++] = namestring
;
2544 if (includes_used
>= includes_allocated
)
2546 const char **orig
= psymtab_include_list
;
2548 psymtab_include_list
= (const char **)
2549 alloca ((includes_allocated
*= 2) *
2550 sizeof (const char *));
2551 memcpy (psymtab_include_list
, orig
,
2552 includes_used
* sizeof (const char *));
2557 /* The value of the C_FUN is not the address of the function (it
2558 appears to be the address before linking), but as long as it
2559 is smaller than the actual address, then find_pc_partial_function
2560 will use the minimal symbols instead. I hope. */
2569 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2572 p
= strchr (namestring
, ':');
2574 continue; /* Not a debugging symbol. */
2576 /* Main processing section for debugging symbols which
2577 the initial read through the symbol tables needs to worry
2578 about. If we reach this point, the symbol which we are
2579 considering is definitely one we are interested in.
2580 p must also contain the (valid) index into the namestring
2581 which indicates the debugging type symbol. */
2586 pst
->add_psymbol (gdb::string_view (namestring
,
2588 true, VAR_DOMAIN
, LOC_STATIC
,
2589 SECT_OFF_DATA (objfile
),
2590 psymbol_placement::STATIC
,
2593 partial_symtabs
, objfile
);
2597 /* The addresses in these entries are reported to be
2598 wrong. See the code that reads 'G's for symtabs. */
2599 pst
->add_psymbol (gdb::string_view (namestring
,
2601 true, VAR_DOMAIN
, LOC_STATIC
,
2602 SECT_OFF_DATA (objfile
),
2603 psymbol_placement::GLOBAL
,
2606 partial_symtabs
, objfile
);
2610 /* When a 'T' entry is defining an anonymous enum, it
2611 may have a name which is the empty string, or a
2612 single space. Since they're not really defining a
2613 symbol, those shouldn't go in the partial symbol
2614 table. We do pick up the elements of such enums at
2615 'check_enum:', below. */
2616 if (p
>= namestring
+ 2
2617 || (p
== namestring
+ 1
2618 && namestring
[0] != ' '))
2620 pst
->add_psymbol (gdb::string_view (namestring
,
2622 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2623 psymbol_placement::STATIC
,
2624 0, psymtab_language
,
2625 partial_symtabs
, objfile
);
2628 /* Also a typedef with the same name. */
2629 pst
->add_psymbol (gdb::string_view (namestring
,
2631 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2632 psymbol_placement::STATIC
,
2633 0, psymtab_language
,
2634 partial_symtabs
, objfile
);
2641 if (p
!= namestring
) /* a name is there, not just :T... */
2643 pst
->add_psymbol (gdb::string_view (namestring
,
2645 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2646 psymbol_placement::STATIC
,
2647 0, psymtab_language
,
2648 partial_symtabs
, 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 pst
->add_psymbol (gdb::string_view (p
, q
- p
), true,
2708 VAR_DOMAIN
, LOC_CONST
, -1,
2709 psymbol_placement::STATIC
,
2710 0, psymtab_language
,
2711 partial_symtabs
, objfile
);
2712 /* Point past the name. */
2714 /* Skip over the value. */
2715 while (*p
&& *p
!= ',')
2717 /* Advance past the comma. */
2725 /* Constant, e.g. from "const" in Pascal. */
2726 pst
->add_psymbol (gdb::string_view (namestring
,
2728 true, VAR_DOMAIN
, LOC_CONST
, -1,
2729 psymbol_placement::STATIC
,
2730 0, psymtab_language
,
2731 partial_symtabs
, objfile
);
2737 int name_len
= p
- namestring
;
2738 char *name
= (char *) xmalloc (name_len
+ 1);
2740 memcpy (name
, namestring
, name_len
);
2741 name
[name_len
] = '\0';
2742 function_outside_compilation_unit_complaint (name
);
2745 pst
->add_psymbol (gdb::string_view (namestring
,
2747 true, VAR_DOMAIN
, LOC_BLOCK
,
2748 SECT_OFF_TEXT (objfile
),
2749 psymbol_placement::STATIC
,
2752 partial_symtabs
, objfile
);
2755 /* Global functions were ignored here, but now they
2756 are put into the global psymtab like one would expect.
2757 They're also in the minimal symbol table. */
2761 int name_len
= p
- namestring
;
2762 char *name
= (char *) xmalloc (name_len
+ 1);
2764 memcpy (name
, namestring
, name_len
);
2765 name
[name_len
] = '\0';
2766 function_outside_compilation_unit_complaint (name
);
2770 /* We need only the minimal symbols for these
2771 loader-generated definitions. Keeping the global
2772 symbols leads to "in psymbols but not in symbols"
2774 if (startswith (namestring
, "@FIX"))
2777 pst
->add_psymbol (gdb::string_view (namestring
,
2779 true, VAR_DOMAIN
, LOC_BLOCK
,
2780 SECT_OFF_TEXT (objfile
),
2781 psymbol_placement::GLOBAL
,
2784 partial_symtabs
, objfile
);
2787 /* Two things show up here (hopefully); static symbols of
2788 local scope (static used inside braces) or extensions
2789 of structure symbols. We can ignore both. */
2803 case '#': /* For symbol identification (used in
2808 /* It is a C++ nested symbol. We don't need to record it
2809 (I don't think); if we try to look up foo::bar::baz,
2810 then symbols for the symtab containing foo should get
2811 read in, I think. */
2812 /* Someone says sun cc puts out symbols like
2813 /foo/baz/maclib::/usr/local/bin/maclib,
2814 which would get here with a symbol type of ':'. */
2818 /* Unexpected symbol descriptor. The second and
2819 subsequent stabs of a continued stab can show up
2820 here. The question is whether they ever can mimic
2821 a normal stab--it would be nice if not, since we
2822 certainly don't want to spend the time searching to
2823 the end of every string looking for a
2826 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2828 /* Ignore it; perhaps it is an extension that we don't
2838 xcoff_end_psymtab (objfile
, partial_symtabs
,
2839 pst
, psymtab_include_list
, includes_used
,
2840 ssymnum
, dependency_list
,
2841 dependencies_used
, textlow_not_set
);
2844 /* Record the toc offset value of this symbol table into objfile
2845 structure. If no XMC_TC0 is found, toc_offset should be zero.
2846 Another place to obtain this information would be file auxiliary
2849 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2852 /* Return the toc offset value for a given objfile. */
2855 xcoff_get_toc_offset (struct objfile
*objfile
)
2858 return XCOFF_DATA (objfile
)->toc_offset
;
2862 /* Scan and build partial symbols for a symbol file.
2863 We have been initialized by a call to dbx_symfile_init, which
2864 put all the relevant info into a "struct dbx_symfile_info",
2865 hung off the objfile structure.
2867 SECTION_OFFSETS contains offsets relative to which the symbols in the
2868 various sections are (depending where the sections were actually
2872 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2876 int num_symbols
; /* # of symbols */
2877 file_ptr symtab_offset
; /* symbol table and */
2878 file_ptr stringtab_offset
; /* string table file offsets */
2879 struct xcoff_symfile_info
*info
;
2883 info
= XCOFF_DATA (objfile
);
2884 symfile_bfd
= abfd
= objfile
->obfd
;
2885 name
= objfile_name (objfile
);
2887 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2888 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2889 stringtab_offset
= symtab_offset
+
2890 num_symbols
* coff_data (abfd
)->local_symesz
;
2892 info
->min_lineno_offset
= 0;
2893 info
->max_lineno_offset
= 0;
2894 bfd_map_over_sections (abfd
, find_linenos
, info
);
2896 if (num_symbols
> 0)
2898 /* Read the string table. */
2899 init_stringtab (abfd
, stringtab_offset
, objfile
);
2901 /* Read the .debug section, if present and if we're not ignoring
2903 if (!(objfile
->flags
& OBJF_READNEVER
))
2905 struct bfd_section
*secp
;
2906 bfd_size_type length
;
2907 bfd_byte
*debugsec
= NULL
;
2909 secp
= bfd_get_section_by_name (abfd
, ".debug");
2912 length
= bfd_section_size (secp
);
2916 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2919 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2921 error (_("Error reading .debug section of `%s': %s"),
2922 name
, bfd_errmsg (bfd_get_error ()));
2926 info
->debugsec
= (char *) debugsec
;
2930 /* Read the symbols. We keep them in core because we will want to
2931 access them randomly in read_symbol*. */
2932 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2934 error (_("Error reading symbols from %s: %s"),
2935 name
, bfd_errmsg (bfd_get_error ()));
2936 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2937 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2938 info
->symtbl_num_syms
= num_symbols
;
2940 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2942 perror_with_name (_("reading symbol table"));
2944 scoped_free_pendings free_pending
;
2945 minimal_symbol_reader
reader (objfile
);
2947 /* Now that the symbol table data of the executable file are all in core,
2948 process them and define symbols accordingly. */
2950 psymbol_functions
*psf
= new psymbol_functions ();
2951 psymtab_storage
*partial_symtabs
= psf
->get_partial_symtabs ().get ();
2952 objfile
->qf
.emplace_front (psf
);
2953 scan_xcoff_symtab (reader
, partial_symtabs
, objfile
);
2955 /* Install any minimal symbols that have been collected as the current
2956 minimal symbols for this objfile. */
2960 /* DWARF2 sections. */
2962 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2963 dwarf2_build_psymtabs (objfile
);
2965 dwarf2_build_frame_info (objfile
);
2969 xcoff_symfile_offsets (struct objfile
*objfile
,
2970 const section_addr_info
&addrs
)
2972 const char *first_section_name
;
2974 default_symfile_offsets (objfile
, addrs
);
2976 /* Oneof the weird side-effects of default_symfile_offsets is that
2977 it sometimes sets some section indices to zero for sections that,
2978 in fact do not exist. See the body of default_symfile_offsets
2979 for more info on when that happens. Undo that, as this then allows
2980 us to test whether the associated section exists or not, and then
2981 access it quickly (without searching it again). */
2983 if (objfile
->section_offsets
.empty ())
2984 return; /* Is that even possible? Better safe than sorry. */
2986 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2988 if (objfile
->sect_index_text
== 0
2989 && strcmp (first_section_name
, ".text") != 0)
2990 objfile
->sect_index_text
= -1;
2992 if (objfile
->sect_index_data
== 0
2993 && strcmp (first_section_name
, ".data") != 0)
2994 objfile
->sect_index_data
= -1;
2996 if (objfile
->sect_index_bss
== 0
2997 && strcmp (first_section_name
, ".bss") != 0)
2998 objfile
->sect_index_bss
= -1;
3000 if (objfile
->sect_index_rodata
== 0
3001 && strcmp (first_section_name
, ".rodata") != 0)
3002 objfile
->sect_index_rodata
= -1;
3005 /* Register our ability to parse symbols for xcoff BFD files. */
3007 static const struct sym_fns xcoff_sym_fns
=
3010 /* It is possible that coff and xcoff should be merged as
3011 they do have fundamental similarities (for example, the extra storage
3012 classes used for stabs could presumably be recognized in any COFF file).
3013 However, in addition to obvious things like all the csect hair, there are
3014 some subtler differences between xcoffread.c and coffread.c, notably
3015 the fact that coffread.c has no need to read in all the symbols, but
3016 xcoffread.c reads all the symbols and does in fact randomly access them
3017 (in C_BSTAT and line number processing). */
3019 xcoff_new_init
, /* init anything gbl to entire symtab */
3020 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3021 xcoff_initial_scan
, /* read a symbol file into symtab */
3022 xcoff_symfile_finish
, /* finished with file, cleanup */
3023 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3024 default_symfile_segments
, /* Get segment information from a file. */
3025 aix_process_linenos
,
3026 default_symfile_relocate
, /* Relocate a debug section. */
3027 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
);