1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2017 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
32 #include "coff/internal.h"
33 #include "libcoff.h" /* FIXME, internal data from BFD */
34 #include "coff/xcoff.h"
36 #include "coff/rs6000.h"
37 #include "xcoffread.h"
41 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "stabsread.h"
46 #include "expression.h"
47 #include "complaints.h"
50 #include "gdb-stabs.h"
52 /* For interface with stabsread.c. */
53 #include "aout/stab_gnu.h"
56 /* Key for XCOFF-associated data. */
58 static const struct objfile_data
*xcoff_objfile_data_key
;
60 /* We put a pointer to this structure in the read_symtab_private field
66 /* First symbol number for this file. */
70 /* Number of symbols in the section of the symbol table devoted to
71 this file's symbols (actually, the section bracketed may contain
72 more than just this file's symbols). If numsyms is 0, the only
73 reason for this thing's existence is the dependency list. Nothing
74 else will happen when it is read in. */
78 /* Position of the start of the line number information for this
80 unsigned int lineno_off
;
83 /* Remember what we deduced to be the source language of this psymtab. */
85 static enum language psymtab_language
= language_unknown
;
88 /* Simplified internal version of coff symbol table information. */
93 int c_symnum
; /* Symbol number of this entry. */
94 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
96 unsigned char c_sclass
;
101 /* Last function's saved coff symbol `cs'. */
103 static struct coff_symbol fcn_cs_saved
;
105 static bfd
*symfile_bfd
;
107 /* Core address of start and end of text of current source file.
108 This is calculated from the first function seen after a C_FILE
112 static CORE_ADDR cur_src_end_addr
;
114 /* Core address of the end of the first object file. */
116 static CORE_ADDR first_object_file_end
;
118 /* Initial symbol-table-debug-string vector length. */
120 #define INITIAL_STABVECTOR_LENGTH 40
122 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
123 there is any reason not to just use a #define, but might as well
124 ask BFD for the size and store it here, I guess. */
126 static unsigned local_symesz
;
128 struct coff_symfile_info
130 file_ptr min_lineno_offset
; /* Where in file lowest line#s are. */
131 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file. */
133 /* Pointer to the string table. */
136 /* Pointer to debug section. */
139 /* Pointer to the a.out symbol table. */
142 /* Number of symbols in symtbl. */
145 /* Offset in data section to TOC anchor. */
146 CORE_ADDR toc_offset
;
149 /* Convenience macro to access the per-objfile XCOFF data. */
151 #define XCOFF_DATA(objfile) \
152 ((struct coff_symfile_info *) objfile_data ((objfile), \
153 xcoff_objfile_data_key))
155 /* XCOFF names for dwarf sections. There is no compressed sections. */
157 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
159 { ".dwabrev", NULL
},
162 { NULL
, NULL
}, /* debug_loclists */
163 /* AIX XCOFF defines one, named DWARF section for macro debug information.
164 XLC does not generate debug_macinfo for DWARF4 and below.
165 The section is assigned to debug_macro for DWARF5 and above. */
169 { NULL
, NULL
}, /* debug_line_str */
170 { ".dwrnges", NULL
},
171 { NULL
, NULL
}, /* debug_rnglists */
172 { ".dwpbtyp", NULL
},
173 { NULL
, NULL
}, /* debug_addr */
174 { ".dwframe", NULL
},
175 { NULL
, NULL
}, /* eh_frame */
176 { NULL
, NULL
}, /* gdb_index */
181 bf_notfound_complaint (void)
183 complaint (&symfile_complaints
,
184 _("line numbers off, `.bf' symbol not found"));
188 ef_complaint (int arg1
)
190 complaint (&symfile_complaints
,
191 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
195 eb_complaint (int arg1
)
197 complaint (&symfile_complaints
,
198 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
201 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
203 static void scan_xcoff_symtab (minimal_symbol_reader
&,
206 static const char *xcoff_next_symbol_text (struct objfile
*);
208 static void record_include_begin (struct coff_symbol
*);
211 enter_line_range (struct subfile
*, unsigned, unsigned,
212 CORE_ADDR
, CORE_ADDR
, unsigned *);
214 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
216 static void xcoff_symfile_init (struct objfile
*);
218 static void xcoff_new_init (struct objfile
*);
220 static void xcoff_symfile_finish (struct objfile
*);
222 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
224 static void read_symbol (struct internal_syment
*, int);
226 static int read_symbol_lineno (int);
228 static CORE_ADDR
read_symbol_nvalue (int);
230 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
233 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
236 static void add_stab_to_list (char *, struct pending_stabs
**);
239 static int compare_lte (const void *, const void *);
241 static struct linetable
*arrange_linetable (struct linetable
*);
243 static void record_include_end (struct coff_symbol
*);
245 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
248 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
250 static int secnum_to_section (int, struct objfile
*);
251 static asection
*secnum_to_bfd_section (int, struct objfile
*);
253 struct find_targ_sec_arg
258 struct objfile
*objfile
;
261 static void find_targ_sec (bfd
*, asection
*, void *);
264 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
266 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
267 struct objfile
*objfile
= args
->objfile
;
269 if (sect
->target_index
== args
->targ_index
)
271 /* This is the section. Figure out what SECT_OFF_* code it is. */
272 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
273 *args
->resultp
= SECT_OFF_TEXT (objfile
);
274 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
275 *args
->resultp
= SECT_OFF_DATA (objfile
);
277 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
278 *args
->bfd_sect
= sect
;
282 /* Search all BFD sections for the section whose target_index is
283 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
284 associated index in the objfile's section_offset table is also
287 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
288 is set to the text section's number. */
291 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
292 asection
**bfd_sect
, int *secnum
)
294 struct find_targ_sec_arg args
;
296 args
.targ_index
= n_scnum
;
297 args
.resultp
= secnum
;
298 args
.bfd_sect
= bfd_sect
;
299 args
.objfile
= objfile
;
302 *secnum
= SECT_OFF_TEXT (objfile
);
304 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
307 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
310 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
315 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
319 /* Return the BFD section that N_SCNUM points to. */
322 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
327 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
331 /* add a given stab string into given stab vector. */
336 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
338 if (*stabvector
== NULL
)
340 *stabvector
= (struct pending_stabs
*)
341 xmalloc (sizeof (struct pending_stabs
) +
342 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
343 (*stabvector
)->count
= 0;
344 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
346 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
348 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
349 *stabvector
= (struct pending_stabs
*)
350 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
351 (*stabvector
)->length
* sizeof (char *));
353 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
358 /* Linenos are processed on a file-by-file basis.
362 1) xlc (IBM's native c compiler) postpones static function code
363 emission to the end of a compilation unit. This way it can
364 determine if those functions (statics) are needed or not, and
365 can do some garbage collection (I think). This makes line
366 numbers and corresponding addresses unordered, and we end up
367 with a line table like:
384 and that breaks gdb's binary search on line numbers, if the
385 above table is not sorted on line numbers. And that sort
386 should be on function based, since gcc can emit line numbers
389 10 0x100 - for the init/test part of a for stmt.
392 10 0x400 - for the increment part of a for stmt.
394 arrange_linetable() will do this sorting.
396 2) aix symbol table might look like:
398 c_file // beginning of a new file
399 .bi // beginning of include file
400 .ei // end of include file
404 basically, .bi/.ei pairs do not necessarily encapsulate
405 their scope. They need to be recorded, and processed later
406 on when we come the end of the compilation unit.
407 Include table (inclTable) and process_linenos() handle
413 /* compare line table entry addresses. */
416 compare_lte (const void *lte1p
, const void *lte2p
)
418 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
419 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
421 return lte1
->pc
- lte2
->pc
;
424 /* Given a line table with function entries are marked, arrange its
425 functions in ascending order and strip off function entry markers
426 and return it in a newly created table. If the old one is good
427 enough, return the old one. */
428 /* FIXME: I think all this stuff can be replaced by just passing
429 sort_linevec = 1 to end_symtab. */
431 static struct linetable
*
432 arrange_linetable (struct linetable
*oldLineTb
)
434 int ii
, jj
, newline
, /* new line count */
435 function_count
; /* # of functions */
437 struct linetable_entry
*fentry
; /* function entry vector */
438 int fentry_size
; /* # of function entries */
439 struct linetable
*newLineTb
; /* new line table */
442 #define NUM_OF_FUNCTIONS 20
444 fentry_size
= NUM_OF_FUNCTIONS
;
445 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
447 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
449 if (oldLineTb
->item
[ii
].line
== 0)
450 { /* Function entry found. */
451 if (function_count
>= fentry_size
)
452 { /* Make sure you have room. */
454 fentry
= (struct linetable_entry
*)
456 fentry_size
* sizeof (struct linetable_entry
));
458 fentry
[function_count
].line
= ii
;
459 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
462 /* If the function was compiled with XLC, we may have to add an
463 extra line entry later. Reserve space for that. */
464 if (ii
+ 1 < oldLineTb
->nitems
465 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
470 if (function_count
== 0)
475 else if (function_count
> 1)
476 qsort (fentry
, function_count
,
477 sizeof (struct linetable_entry
), compare_lte
);
479 /* Allocate a new line table. */
480 newLineTb
= (struct linetable
*)
482 (sizeof (struct linetable
) +
483 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
485 /* If line table does not start with a function beginning, copy up until
489 if (oldLineTb
->item
[0].line
!= 0)
491 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
492 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
494 /* Now copy function lines one by one. */
496 for (ii
= 0; ii
< function_count
; ++ii
)
498 /* If the function was compiled with XLC, we may have to add an
499 extra line to cover the function prologue. */
500 jj
= fentry
[ii
].line
;
501 if (jj
+ 1 < oldLineTb
->nitems
502 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
504 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
505 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
509 for (jj
= fentry
[ii
].line
+ 1;
510 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
512 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
515 /* The number of items in the line table must include these
516 extra lines which were added in case of XLC compiled functions. */
517 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
521 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
522 following `IncludeChain'. At the end of each symtab (end_symtab),
523 we will determine if we should create additional symtab's to
524 represent if (the include files. */
527 typedef struct _inclTable
529 char *name
; /* include filename */
531 /* Offsets to the line table. end points to the last entry which is
532 part of this include file. */
535 struct subfile
*subfile
;
536 unsigned funStartLine
; /* Start line # of its function. */
540 #define INITIAL_INCLUDE_TABLE_LENGTH 20
541 static InclTable
*inclTable
; /* global include table */
542 static int inclIndx
; /* last entry to table */
543 static int inclLength
; /* table length */
544 static int inclDepth
; /* nested include depth */
546 static void allocate_include_entry (void);
549 record_include_begin (struct coff_symbol
*cs
)
553 /* In xcoff, we assume include files cannot be nested (not in .c files
554 of course, but in corresponding .s files.). */
556 /* This can happen with old versions of GCC.
557 GCC 2.3.3-930426 does not exhibit this on a test case which
558 a user said produced the message for him. */
559 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
563 allocate_include_entry ();
565 inclTable
[inclIndx
].name
= cs
->c_name
;
566 inclTable
[inclIndx
].begin
= cs
->c_value
;
570 record_include_end (struct coff_symbol
*cs
)
576 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
579 allocate_include_entry ();
581 pTbl
= &inclTable
[inclIndx
];
582 pTbl
->end
= cs
->c_value
;
589 allocate_include_entry (void)
591 if (inclTable
== NULL
)
593 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
594 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
597 else if (inclIndx
>= inclLength
)
599 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
600 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
601 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
602 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
606 /* Global variable to pass the psymtab down to all the routines involved
607 in psymtab to symtab processing. */
608 static struct partial_symtab
*this_symtab_psymtab
;
610 /* Objfile related to this_symtab_psymtab; set at the same time. */
611 static struct objfile
*this_symtab_objfile
;
613 /* given the start and end addresses of a compilation unit (or a csect,
614 at times) process its lines and create appropriate line vectors. */
617 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
621 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
623 /* subfile structure for the main compilation unit. */
624 struct subfile main_subfile
;
626 /* In the main source file, any time we see a function entry, we
627 reset this variable to function's absolute starting line number.
628 All the following line numbers in the function are relative to
629 this, and we record absolute line numbers in record_line(). */
631 unsigned int main_source_baseline
= 0;
636 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
638 goto return_after_cleanup
;
640 memset (&main_subfile
, '\0', sizeof (main_subfile
));
643 /* All source lines were in the main source file. None in include
646 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
647 &main_source_baseline
);
651 /* There was source with line numbers in include files. */
654 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
655 main_source_baseline
= 0;
657 for (ii
= 0; ii
< inclIndx
; ++ii
)
659 struct subfile
*tmpSubfile
;
661 /* If there is main file source before include file, enter it. */
662 if (offset
< inclTable
[ii
].begin
)
665 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
666 start
, 0, &main_source_baseline
);
669 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
671 /* The entry in the include table refers to the main source
672 file. Add the lines to the main subfile. */
674 main_source_baseline
= inclTable
[ii
].funStartLine
;
676 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
677 start
, 0, &main_source_baseline
);
678 inclTable
[ii
].subfile
= &main_subfile
;
682 /* Have a new subfile for the include file. */
684 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
686 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
687 firstLine
= &(inclTable
[ii
].funStartLine
);
689 /* Enter include file's lines now. */
690 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
691 inclTable
[ii
].end
, start
, 0, firstLine
);
694 if (offset
<= inclTable
[ii
].end
)
695 offset
= inclTable
[ii
].end
+ linesz
;
698 /* All the include files' line have been processed at this point. Now,
699 enter remaining lines of the main file, if any left. */
700 if (offset
< max_offset
+ 1 - linesz
)
702 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
703 &main_source_baseline
);
707 /* Process main file's line numbers. */
708 if (main_subfile
.line_vector
)
710 struct linetable
*lineTb
, *lv
;
712 lv
= main_subfile
.line_vector
;
714 /* Line numbers are not necessarily ordered. xlc compilation will
715 put static function to the end. */
717 lineTb
= arrange_linetable (lv
);
720 current_subfile
->line_vector
= (struct linetable
*)
721 xrealloc (lv
, (sizeof (struct linetable
)
722 + lv
->nitems
* sizeof (struct linetable_entry
)));
727 current_subfile
->line_vector
= lineTb
;
730 current_subfile
->line_vector_length
=
731 current_subfile
->line_vector
->nitems
;
734 /* Now, process included files' line numbers. */
736 for (ii
= 0; ii
< inclIndx
; ++ii
)
738 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
739 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
742 struct linetable
*lineTb
, *lv
;
744 lv
= (inclTable
[ii
].subfile
)->line_vector
;
746 /* Line numbers are not necessarily ordered. xlc compilation will
747 put static function to the end. */
749 lineTb
= arrange_linetable (lv
);
753 /* For the same include file, we might want to have more than one
754 subfile. This happens if we have something like:
762 while foo.h including code in it. (stupid but possible)
763 Since start_subfile() looks at the name and uses an
764 existing one if finds, we need to provide a fake name and
768 start_subfile (inclTable
[ii
].name
);
771 /* Pick a fake name that will produce the same results as this
772 one when passed to deduce_language_from_filename. Kludge on
774 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
776 if (fakename
== NULL
)
778 start_subfile (fakename
);
779 xfree (current_subfile
->name
);
781 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
786 current_subfile
->line_vector
=
787 (struct linetable
*) xrealloc
788 (lv
, (sizeof (struct linetable
)
789 + lv
->nitems
* sizeof (struct linetable_entry
)));
795 current_subfile
->line_vector
= lineTb
;
798 current_subfile
->line_vector_length
=
799 current_subfile
->line_vector
->nitems
;
800 start_subfile (pop_subfile ());
804 return_after_cleanup
:
806 /* We don't want to keep alloc/free'ing the global include file table. */
811 aix_process_linenos (struct objfile
*objfile
)
813 /* There is no linenos to read if there are only dwarf info. */
814 if (this_symtab_psymtab
== NULL
)
817 /* Process line numbers and enter them into line vector. */
818 process_linenos (last_source_start_addr
, cur_src_end_addr
);
822 /* Enter a given range of lines into the line vector.
823 can be called in the following two ways:
824 enter_line_range (subfile, beginoffset, endoffset,
825 startaddr, 0, firstLine) or
826 enter_line_range (subfile, beginoffset, 0,
827 startaddr, endaddr, firstLine)
829 endoffset points to the last line table entry that we should pay
833 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
834 unsigned endoffset
, /* offsets to line table */
835 CORE_ADDR startaddr
, /* offsets to line table */
836 CORE_ADDR endaddr
, unsigned *firstLine
)
838 struct objfile
*objfile
= this_symtab_objfile
;
839 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
840 unsigned int curoffset
;
843 struct internal_lineno int_lnno
;
844 unsigned int limit_offset
;
848 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
850 curoffset
= beginoffset
;
851 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
855 if (endoffset
>= limit_offset
)
857 complaint (&symfile_complaints
,
858 _("Bad line table offset in C_EINCL directive"));
861 limit_offset
= endoffset
;
866 abfd
= objfile
->obfd
;
867 linesz
= coff_data (abfd
)->local_linesz
;
868 ext_lnno
= alloca (linesz
);
870 while (curoffset
<= limit_offset
)
872 bfd_seek (abfd
, curoffset
, SEEK_SET
);
873 bfd_bread (ext_lnno
, linesz
, abfd
);
874 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
876 /* Find the address this line represents. */
877 addr
= (int_lnno
.l_lnno
878 ? int_lnno
.l_addr
.l_paddr
879 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
880 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
882 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
885 if (int_lnno
.l_lnno
== 0)
887 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
888 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
892 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
893 gdbarch_addr_bits_remove (gdbarch
, addr
));
899 /* Save the vital information for use when closing off the current file.
900 NAME is the file name the symbols came from, START_ADDR is the first
901 text address for the file, and SIZE is the number of bytes of text. */
903 #define complete_symtab(name, start_addr) { \
904 set_last_source_file (name); \
905 last_source_start_addr = start_addr; \
909 /* Refill the symbol table input buffer
910 and set the variables that control fetching entries from it.
911 Reports an error if no data available.
912 This function can read past the end of the symbol table
913 (into the string table) but this does no harm. */
915 /* Create a new minimal symbol (using record_with_info).
917 Creation of all new minimal symbols should go through this function
918 rather than calling the various record functions in order
919 to make sure that all symbol addresses get properly relocated.
923 NAME - the symbol's name (but if NAME starts with a period, that
924 leading period is discarded).
925 ADDRESS - the symbol's address, prior to relocation. This function
926 relocates the address before recording the minimal symbol.
927 MS_TYPE - the symbol's type.
928 N_SCNUM - the symbol's XCOFF section number.
929 OBJFILE - the objfile associated with the minimal symbol. */
932 record_minimal_symbol (minimal_symbol_reader
&reader
,
933 const char *name
, CORE_ADDR address
,
934 enum minimal_symbol_type ms_type
,
936 struct objfile
*objfile
)
941 reader
.record_with_info (name
, address
, ms_type
,
942 secnum_to_section (n_scnum
, objfile
));
945 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
946 nested. At any given time, a symbol can only be in one static block.
947 This is the base address of current static block, zero if non exists. */
949 static int static_block_base
= 0;
951 /* Section number for the current static block. */
953 static int static_block_section
= -1;
955 /* true if space for symbol name has been allocated. */
957 static int symname_alloced
= 0;
959 /* Next symbol to read. Pointer into raw seething symbol table. */
961 static char *raw_symbol
;
963 /* This is the function which stabsread.c calls to get symbol
967 xcoff_next_symbol_text (struct objfile
*objfile
)
969 struct internal_syment symbol
;
972 /* FIXME: is this the same as the passed arg? */
973 if (this_symtab_objfile
)
974 objfile
= this_symtab_objfile
;
976 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
979 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
981 /* Return something which points to '\0' and hope the symbol reading
982 code does something reasonable. */
985 else if (symbol
.n_sclass
& 0x80)
987 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
988 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
993 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
995 /* Return something which points to '\0' and hope the symbol reading
996 code does something reasonable. */
1002 /* Read symbols for a given partial symbol table. */
1005 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1007 bfd
*abfd
= objfile
->obfd
;
1008 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1009 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1010 char *strtbl
= xcoff
->strtbl
;
1011 char *debugsec
= xcoff
->debugsec
;
1012 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1014 struct internal_syment symbol
[1];
1015 union internal_auxent main_aux
;
1016 struct coff_symbol cs
[1];
1017 CORE_ADDR file_start_addr
= 0;
1018 CORE_ADDR file_end_addr
= 0;
1020 int next_file_symnum
= -1;
1021 unsigned int max_symnum
;
1022 int just_started
= 1;
1024 CORE_ADDR fcn_start_addr
= 0;
1026 struct coff_symbol fcn_stab_saved
= { 0 };
1028 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1029 union internal_auxent fcn_aux_saved
= main_aux
;
1030 struct context_stack
*newobj
;
1032 const char *filestring
= pst
->filename
; /* Name of the current file. */
1034 const char *last_csect_name
; /* Last seen csect's name. */
1036 this_symtab_psymtab
= pst
;
1037 this_symtab_objfile
= objfile
;
1039 /* Get the appropriate COFF "constants" related to the file we're
1041 local_symesz
= coff_data (abfd
)->local_symesz
;
1043 set_last_source_file (NULL
);
1044 last_csect_name
= 0;
1047 start_symtab (objfile
, filestring
, (char *) NULL
, file_start_addr
);
1048 record_debugformat (debugfmt
);
1049 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1051 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1052 first_object_file_end
= 0;
1054 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1056 while (symnum
< max_symnum
)
1058 QUIT
; /* make this command interruptable. */
1060 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1061 /* read one symbol into `cs' structure. After processing the
1062 whole symbol table, only string table will be kept in memory,
1063 symbol table and debug section of xcoff will be freed. Thus
1064 we can mark symbols with names in string table as
1069 /* Swap and align the symbol into a reasonable C structure. */
1070 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1072 cs
->c_symnum
= symnum
;
1073 cs
->c_naux
= symbol
->n_numaux
;
1074 if (symbol
->n_zeroes
)
1076 symname_alloced
= 0;
1077 /* We must use the original, unswapped, name here so the name field
1078 pointed to by cs->c_name will persist throughout xcoffread. If
1079 we use the new field, it gets overwritten for each symbol. */
1080 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1081 /* If it's exactly E_SYMNMLEN characters long it isn't
1083 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1087 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1089 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1090 p
[E_SYMNMLEN
] = '\0';
1092 symname_alloced
= 1;
1095 else if (symbol
->n_sclass
& 0x80)
1097 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1098 symname_alloced
= 0;
1102 /* in string table */
1103 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1104 symname_alloced
= 1;
1106 cs
->c_value
= symbol
->n_value
;
1107 cs
->c_sclass
= symbol
->n_sclass
;
1108 cs
->c_secnum
= symbol
->n_scnum
;
1109 cs
->c_type
= (unsigned) symbol
->n_type
;
1111 raw_symbol
+= local_symesz
;
1114 /* Save addr of first aux entry. */
1115 raw_auxptr
= raw_symbol
;
1117 /* Skip all the auxents associated with this symbol. */
1118 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1120 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1125 /* if symbol name starts with ".$" or "$", ignore it. */
1126 if (cs
->c_name
[0] == '$'
1127 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1130 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1132 if (get_last_source_file ())
1134 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1135 SECT_OFF_TEXT (objfile
));
1140 start_symtab (objfile
, "_globals_", (char *) NULL
, (CORE_ADDR
) 0);
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 auxiliay 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
,
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
+ ANOFFSET (objfile
->section_offsets
,
1245 SECT_OFF_TEXT (objfile
));
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_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_symtab (objfile
, filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1351 record_debugformat (debugfmt
);
1352 last_csect_name
= 0;
1354 /* reset file start and end addresses. A compilation unit
1355 with no text (only data) should have zero file
1357 file_start_addr
= file_end_addr
= 0;
1361 fcn_stab_saved
= *cs
;
1365 if (strcmp (cs
->c_name
, ".bf") == 0)
1367 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1368 SECT_OFF_TEXT (objfile
));
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 SYMBOL_SECTION (newobj
->name
) = 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 (context_stack_depth
<= 0)
1394 { /* We attempted to pop an empty context stack. */
1395 ef_complaint (cs
->c_symnum
);
1396 within_function
= 0;
1399 newobj
= pop_context ();
1400 /* Stack must be empty now. */
1401 if (context_stack_depth
> 0 || newobj
== NULL
)
1403 ef_complaint (cs
->c_symnum
);
1404 within_function
= 0;
1408 finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
1409 NULL
, newobj
->start_addr
,
1410 (fcn_cs_saved
.c_value
1411 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1412 + ANOFFSET (objfile
->section_offsets
,
1413 SECT_OFF_TEXT (objfile
))));
1414 within_function
= 0;
1419 /* Begin static block. */
1421 struct internal_syment symbol
;
1423 read_symbol (&symbol
, cs
->c_value
);
1424 static_block_base
= symbol
.n_value
;
1425 static_block_section
=
1426 secnum_to_section (symbol
.n_scnum
, objfile
);
1431 /* End of static block. */
1432 static_block_base
= 0;
1433 static_block_section
= -1;
1444 complaint (&symfile_complaints
,
1445 _("Unrecognized storage class %d."),
1460 /* beginning of include file */
1461 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1462 order. Thus, when wee see them, we might not know enough info
1463 to process them. Thus, we'll be saving them into a table
1464 (inclTable) and postpone their processing. */
1466 record_include_begin (cs
);
1470 /* End of include file. */
1471 /* See the comment after case C_BINCL. */
1472 record_include_end (cs
);
1476 if (strcmp (cs
->c_name
, ".bb") == 0)
1479 newobj
= push_context (depth
,
1481 + ANOFFSET (objfile
->section_offsets
,
1482 SECT_OFF_TEXT (objfile
))));
1484 else if (strcmp (cs
->c_name
, ".eb") == 0)
1486 if (context_stack_depth
<= 0)
1487 { /* We attempted to pop an empty context stack. */
1488 eb_complaint (cs
->c_symnum
);
1491 newobj
= pop_context ();
1492 if (depth
-- != newobj
->depth
)
1494 eb_complaint (cs
->c_symnum
);
1497 if (local_symbols
&& context_stack_depth
> 0)
1499 /* Make a block for the local symbols within. */
1500 finish_block (newobj
->name
, &local_symbols
,
1501 newobj
->old_blocks
, NULL
,
1504 + ANOFFSET (objfile
->section_offsets
,
1505 SECT_OFF_TEXT (objfile
))));
1507 local_symbols
= newobj
->locals
;
1512 process_xcoff_symbol (cs
, objfile
);
1517 if (get_last_source_file ())
1519 struct compunit_symtab
*cust
;
1521 complete_symtab (filestring
, file_start_addr
);
1522 cur_src_end_addr
= file_end_addr
;
1523 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1524 /* When reading symbols for the last C_FILE of the objfile, try
1525 to make sure that we set pst->compunit_symtab to the symtab for the
1526 file, not to the _globals_ symtab. I'm not sure whether this
1527 actually works right or when/if it comes up. */
1528 if (pst
->compunit_symtab
== NULL
)
1529 pst
->compunit_symtab
= cust
;
1534 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1535 (SYMBOL2) = XOBNEW (&objfile->objfile_obstack, struct symbol); \
1536 *(SYMBOL2) = *(SYMBOL1);
1539 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1540 ((ALLOCED) ? (NAME) : obstack_copy0 (&objfile->objfile_obstack, \
1541 (NAME), strlen (NAME)))
1544 /* process one xcoff symbol. */
1546 static struct symbol
*
1547 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1549 struct symbol onesymbol
;
1550 struct symbol
*sym
= &onesymbol
;
1551 struct symbol
*sym2
= NULL
;
1557 if (cs
->c_secnum
< 0)
1559 /* The value is a register number, offset within a frame, etc.,
1560 and does not get relocated. */
1566 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1567 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1574 initialize_objfile_symbol (sym
);
1576 /* default assumptions */
1577 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1578 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1579 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1581 if (ISFCN (cs
->c_type
))
1583 /* At this point, we don't know the type of the function. This
1584 will be patched with the type from its stab entry later on in
1585 patch_block_stabs (), unless the file was compiled without -g. */
1587 SYMBOL_SET_LINKAGE_NAME (sym
, ((const char *)
1588 SYMNAME_ALLOC (name
, symname_alloced
)));
1589 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1591 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1592 SYMBOL_DUP (sym
, sym2
);
1594 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1595 add_symbol_to_list (sym2
, &global_symbols
);
1596 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1597 add_symbol_to_list (sym2
, &file_symbols
);
1601 /* In case we can't figure out the type, provide default. */
1602 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1604 switch (cs
->c_sclass
)
1607 /* The values of functions and global symbols are now resolved
1608 via the global_sym_chain in stabsread.c. */
1610 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1611 add_stab_to_list (name
, &global_stabs
);
1613 add_stab_to_list (name
, &file_stabs
);
1617 add_stab_to_list (name
, &global_stabs
);
1622 common_block_start (cs
->c_name
, objfile
);
1626 common_block_end (objfile
);
1630 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1643 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1646 SYMBOL_SECTION (sym
) = sec
;
1653 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1654 all statics and we need to distinguish file-scope versus
1655 function-scope using within_function. We do this by
1656 changing the string we pass to define_symbol to use 'S'
1657 where we need to, which is not necessarily super-clean,
1658 but seems workable enough. */
1663 pp
= strchr (name
, ':');
1668 if (*pp
== 'V' && !within_function
)
1670 sym
= define_symbol ((cs
->c_value
1671 + ANOFFSET (objfile
->section_offsets
,
1672 static_block_section
)),
1673 cs
->c_name
, 0, 0, objfile
);
1676 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1677 SYMBOL_SECTION (sym
) = static_block_section
;
1686 /* Extract the file name from the aux entry of a C_FILE symbol.
1687 Result is in static storage and is only good for temporary use. */
1690 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1692 static char buffer
[BUFSIZ
];
1694 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1695 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1696 + aux_entry
->x_file
.x_n
.x_offset
));
1699 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1700 buffer
[FILNMLEN
] = '\0';
1705 /* Set *SYMBOL to symbol number symno in symtbl. */
1707 read_symbol (struct internal_syment
*symbol
, int symno
)
1709 struct coff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1710 int nsyms
= xcoff
->symtbl_num_syms
;
1711 char *stbl
= xcoff
->symtbl
;
1713 if (symno
< 0 || symno
>= nsyms
)
1715 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1716 symbol
->n_value
= 0;
1717 symbol
->n_scnum
= -1;
1720 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1721 stbl
+ (symno
* local_symesz
),
1725 /* Get value corresponding to symbol number symno in symtbl. */
1728 read_symbol_nvalue (int symno
)
1730 struct internal_syment symbol
[1];
1732 read_symbol (symbol
, symno
);
1733 return symbol
->n_value
;
1737 /* Find the address of the function corresponding to symno, where
1738 symno is the symbol pointed to by the linetable. */
1741 read_symbol_lineno (int symno
)
1743 struct objfile
*objfile
= this_symtab_objfile
;
1744 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1746 struct coff_symfile_info
*info
= XCOFF_DATA (objfile
);
1747 int nsyms
= info
->symtbl_num_syms
;
1748 char *stbl
= info
->symtbl
;
1749 char *strtbl
= info
->strtbl
;
1751 struct internal_syment symbol
[1];
1752 union internal_auxent main_aux
[1];
1756 bf_notfound_complaint ();
1760 /* Note that just searching for a short distance (e.g. 50 symbols)
1761 is not enough, at least in the following case.
1764 [many .stabx entries]
1765 [a few functions, referring to foo]
1769 What happens here is that the assembler moves the .stabx entries
1770 to right before the ".bf" for foo, but the symbol for "foo" is before
1771 all the stabx entries. See PR gdb/2222. */
1773 /* Maintaining a table of .bf entries might be preferable to this search.
1774 If I understand things correctly it would need to be done only for
1775 the duration of a single psymtab to symtab conversion. */
1776 while (symno
< nsyms
)
1778 bfd_coff_swap_sym_in (symfile_bfd
,
1779 stbl
+ (symno
* local_symesz
), symbol
);
1780 if (symbol
->n_sclass
== C_FCN
)
1782 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1784 if (strcmp (name
, ".bf") == 0)
1787 symno
+= symbol
->n_numaux
+ 1;
1790 bf_notfound_complaint ();
1794 /* Take aux entry and return its lineno. */
1796 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1797 symbol
->n_type
, symbol
->n_sclass
,
1798 0, symbol
->n_numaux
, main_aux
);
1800 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1803 /* Support for line number handling. */
1805 /* This function is called for every section; it finds the outer limits
1806 * of the line table (minimum and maximum file offset) so that the
1807 * mainline code can read the whole thing for efficiency.
1810 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1812 struct coff_symfile_info
*info
;
1814 file_ptr offset
, maxoff
;
1816 count
= asect
->lineno_count
;
1818 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1821 size
= count
* coff_data (abfd
)->local_linesz
;
1822 info
= (struct coff_symfile_info
*) vpinfo
;
1823 offset
= asect
->line_filepos
;
1824 maxoff
= offset
+ size
;
1826 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1827 info
->min_lineno_offset
= offset
;
1829 if (maxoff
> info
->max_lineno_offset
)
1830 info
->max_lineno_offset
= maxoff
;
1834 xcoff_psymtab_to_symtab_1 (struct objfile
*objfile
, struct partial_symtab
*pst
)
1844 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1849 /* Read in all partial symtabs on which this one is dependent. */
1850 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1851 if (!pst
->dependencies
[i
]->readin
)
1853 /* Inform about additional files that need to be read in. */
1856 fputs_filtered (" ", gdb_stdout
);
1858 fputs_filtered ("and ", gdb_stdout
);
1860 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1861 wrap_here (""); /* Flush output */
1862 gdb_flush (gdb_stdout
);
1864 xcoff_psymtab_to_symtab_1 (objfile
, pst
->dependencies
[i
]);
1867 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1869 /* Init stuff necessary for reading in symbols. */
1873 scoped_free_pendings free_pending
;
1874 read_xcoff_symtab (objfile
, pst
);
1880 /* Read in all of the symbols for a given psymtab for real.
1881 Be verbose about it if the user wants that. SELF is not NULL. */
1884 xcoff_read_symtab (struct partial_symtab
*self
, struct objfile
*objfile
)
1889 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1894 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1895 || self
->number_of_dependencies
)
1897 /* Print the message now, before reading the string table,
1898 to avoid disconcerting pauses. */
1901 printf_filtered ("Reading in symbols for %s...", self
->filename
);
1902 gdb_flush (gdb_stdout
);
1905 next_symbol_text_func
= xcoff_next_symbol_text
;
1907 xcoff_psymtab_to_symtab_1 (objfile
, self
);
1909 /* Match with global symbols. This only needs to be done once,
1910 after all of the symtabs and dependencies have been read in. */
1911 scan_file_globals (objfile
);
1913 /* Finish up the debug error message. */
1915 printf_filtered ("done.\n");
1920 xcoff_new_init (struct objfile
*objfile
)
1922 stabsread_new_init ();
1923 buildsym_new_init ();
1926 /* Do initialization in preparation for reading symbols from OBJFILE.
1928 We will only be called if this is an XCOFF or XCOFF-like file.
1929 BFD handles figuring out the format of the file, and code in symfile.c
1930 uses BFD's determination to vector to us. */
1933 xcoff_symfile_init (struct objfile
*objfile
)
1935 struct coff_symfile_info
*xcoff
;
1937 /* Allocate struct to keep track of the symfile. */
1938 xcoff
= XNEW (struct coff_symfile_info
);
1939 set_objfile_data (objfile
, xcoff_objfile_data_key
, xcoff
);
1941 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1942 find this causes a significant slowdown in gdb then we could
1943 set it in the debug symbol readers only when necessary. */
1944 objfile
->flags
|= OBJF_REORDERED
;
1947 /* Perform any local cleanups required when we are done with a particular
1948 objfile. I.E, we are in the process of discarding all symbol information
1949 for an objfile, freeing up all memory held for it, and unlinking the
1950 objfile struct from the global list of known objfiles. */
1953 xcoff_symfile_finish (struct objfile
*objfile
)
1955 /* Start with a fresh include table for the next objfile. */
1961 inclIndx
= inclLength
= inclDepth
= 0;
1963 dwarf2_free_objfile (objfile
);
1968 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1972 unsigned char lengthbuf
[4];
1974 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1976 xcoff
->strtbl
= NULL
;
1978 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1979 error (_("cannot seek to string table in %s: %s"),
1980 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1982 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1983 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1985 /* If no string table is needed, then the file may end immediately
1986 after the symbols. Just return with `strtbl' set to NULL. */
1988 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1991 /* Allocate string table from objfile_obstack. We will need this table
1992 as long as we have its symbol table around. */
1994 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1995 xcoff
->strtbl
= strtbl
;
1997 /* Copy length buffer, the first byte is usually zero and is
1998 used for stabs with a name length of zero. */
1999 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
2000 if (length
== sizeof lengthbuf
)
2003 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
2005 if (val
!= length
- sizeof lengthbuf
)
2006 error (_("cannot read string table from %s: %s"),
2007 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
2008 if (strtbl
[length
- 1] != '\0')
2009 error (_("bad symbol file: string table "
2010 "does not end with null character"));
2015 /* If we have not yet seen a function for this psymtab, this is 0. If we
2016 have seen one, it is the offset in the line numbers of the line numbers
2018 static unsigned int first_fun_line_offset
;
2020 /* Allocate and partially fill a partial symtab. It will be
2021 completely filled at the end of the symbol list.
2023 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2024 is the address relative to which its symbols are (incremental) or 0
2027 static struct partial_symtab
*
2028 xcoff_start_psymtab (struct objfile
*objfile
,
2029 const char *filename
, int first_symnum
,
2030 std::vector
<partial_symbol
*> &global_psymbols
,
2031 std::vector
<partial_symbol
*> &static_psymbols
)
2033 struct partial_symtab
*result
=
2034 start_psymtab_common (objfile
,
2036 /* We fill in textlow later. */
2038 global_psymbols
, static_psymbols
);
2040 result
->read_symtab_private
=
2041 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
2042 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2043 result
->read_symtab
= xcoff_read_symtab
;
2045 /* Deduce the source language from the filename for this psymtab. */
2046 psymtab_language
= deduce_language_from_filename (filename
);
2051 /* Close off the current usage of PST.
2052 Returns PST, or NULL if the partial symtab was empty and thrown away.
2054 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2056 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2057 are the information for includes and dependencies. */
2059 static struct partial_symtab
*
2060 xcoff_end_psymtab (struct objfile
*objfile
, struct partial_symtab
*pst
,
2061 const char **include_list
, int num_includes
,
2062 int capping_symbol_number
,
2063 struct partial_symtab
**dependency_list
,
2064 int number_dependencies
, int textlow_not_set
)
2068 if (capping_symbol_number
!= -1)
2069 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2070 capping_symbol_number
2071 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2072 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2073 first_fun_line_offset
;
2074 first_fun_line_offset
= 0;
2076 end_psymtab_common (objfile
, pst
);
2078 pst
->number_of_dependencies
= number_dependencies
;
2079 if (number_dependencies
)
2081 pst
->dependencies
= XOBNEWVEC (&objfile
->objfile_obstack
,
2082 struct partial_symtab
*,
2083 number_dependencies
);
2084 memcpy (pst
->dependencies
, dependency_list
,
2085 number_dependencies
* sizeof (struct partial_symtab
*));
2088 pst
->dependencies
= 0;
2090 for (i
= 0; i
< num_includes
; i
++)
2092 struct partial_symtab
*subpst
=
2093 allocate_psymtab (include_list
[i
], objfile
);
2095 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2096 sizeof (struct symloc
));
2097 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2098 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2099 subpst
->textlow
= 0;
2100 subpst
->texthigh
= 0;
2102 /* We could save slight bits of space by only making one of these,
2103 shared by the entire set of include files. FIXME-someday. */
2104 subpst
->dependencies
=
2105 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2106 subpst
->dependencies
[0] = pst
;
2107 subpst
->number_of_dependencies
= 1;
2109 subpst
->globals_offset
=
2110 subpst
->n_global_syms
=
2111 subpst
->statics_offset
=
2112 subpst
->n_static_syms
= 0;
2115 subpst
->compunit_symtab
= NULL
;
2116 subpst
->read_symtab
= pst
->read_symtab
;
2119 if (num_includes
== 0
2120 && number_dependencies
== 0
2121 && pst
->n_global_syms
== 0
2122 && pst
->n_static_syms
== 0)
2124 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2125 it is on the obstack, but we can forget to chain it on the list. */
2126 /* Empty psymtabs happen as a result of header files which don't have
2127 any symbols in them. There can be a lot of them. */
2129 discard_psymtab (objfile
, pst
);
2131 /* Indicate that psymtab was thrown away. */
2137 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2138 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2139 the symbol and its auxents. */
2142 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2143 const char **name
, char **raw
, unsigned int *symnump
,
2144 struct objfile
*objfile
)
2146 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2147 if (symbol
->n_zeroes
)
2149 /* If it's exactly E_SYMNMLEN characters long it isn't
2151 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2153 /* FIXME: wastes memory for symbols which we don't end up putting
2154 into the minimal symbols. */
2157 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2159 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2160 p
[E_SYMNMLEN
] = '\0';
2164 /* Point to the unswapped name as that persists as long as the
2166 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2168 else if (symbol
->n_sclass
& 0x80)
2170 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2174 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2177 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2178 if (symbol
->n_numaux
> 0)
2180 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2181 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2183 *symnump
+= symbol
->n_numaux
;
2184 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2189 function_outside_compilation_unit_complaint (const char *arg1
)
2191 complaint (&symfile_complaints
,
2192 _("function `%s' appears to be defined "
2193 "outside of all compilation units"),
2198 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2199 struct objfile
*objfile
)
2201 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2202 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2203 const char *filestring
= NULL
;
2205 const char *namestring
;
2210 /* Current partial symtab */
2211 struct partial_symtab
*pst
;
2213 /* List of current psymtab's include files. */
2214 const char **psymtab_include_list
;
2215 int includes_allocated
;
2218 /* Index within current psymtab dependency list. */
2219 struct partial_symtab
**dependency_list
;
2220 int dependencies_used
, dependencies_allocated
;
2223 struct internal_syment symbol
;
2224 union internal_auxent main_aux
[5];
2225 unsigned int ssymnum
;
2227 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2228 CORE_ADDR last_csect_val
= 0;
2229 int last_csect_sec
= 0;
2230 int misc_func_recorded
= 0; /* true if any misc. function. */
2231 int textlow_not_set
= 1;
2233 pst
= (struct partial_symtab
*) 0;
2235 includes_allocated
= 30;
2237 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2238 sizeof (const char *));
2240 dependencies_allocated
= 30;
2241 dependencies_used
= 0;
2243 (struct partial_symtab
**) alloca (dependencies_allocated
*
2244 sizeof (struct partial_symtab
*));
2246 set_last_source_file (NULL
);
2248 abfd
= objfile
->obfd
;
2249 next_symbol_text_func
= xcoff_next_symbol_text
;
2251 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2252 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2254 while (ssymnum
< nsyms
)
2260 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2261 sclass
= symbol
.n_sclass
;
2269 /* The CSECT auxent--always the last auxent. */
2270 union internal_auxent csect_aux
;
2271 unsigned int symnum_before
= ssymnum
;
2273 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2275 if (symbol
.n_numaux
> 1)
2277 bfd_coff_swap_aux_in
2279 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2282 symbol
.n_numaux
- 1,
2287 csect_aux
= main_aux
[0];
2289 /* If symbol name starts with ".$" or "$", ignore it. */
2290 if (namestring
[0] == '$'
2291 || (namestring
[0] == '.' && namestring
[1] == '$'))
2294 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2297 switch (csect_aux
.x_csect
.x_smclas
)
2300 if (last_csect_name
)
2302 /* If no misc. function recorded in the last
2303 seen csect, enter it as a function. This
2304 will take care of functions like strcmp()
2307 if (!misc_func_recorded
)
2309 record_minimal_symbol
2310 (reader
, last_csect_name
, last_csect_val
,
2311 mst_text
, last_csect_sec
, objfile
);
2312 misc_func_recorded
= 1;
2317 /* We have to allocate one psymtab for
2318 each program csect, because their text
2319 sections need not be adjacent. */
2321 (objfile
, pst
, psymtab_include_list
,
2322 includes_used
, symnum_before
, dependency_list
,
2323 dependencies_used
, textlow_not_set
);
2325 dependencies_used
= 0;
2326 /* Give all psymtabs for this source file the same
2328 pst
= xcoff_start_psymtab
2332 objfile
->global_psymbols
,
2333 objfile
->static_psymbols
);
2336 /* Activate the misc_func_recorded mechanism for
2337 compiler- and linker-generated CSECTs like ".strcmp"
2339 if (namestring
&& (namestring
[0] == '.'
2340 || namestring
[0] == '@'))
2342 last_csect_name
= namestring
;
2343 last_csect_val
= symbol
.n_value
;
2344 last_csect_sec
= symbol
.n_scnum
;
2349 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2351 if (highval
> pst
->texthigh
)
2352 pst
->texthigh
= highval
;
2353 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2354 pst
->textlow
= symbol
.n_value
;
2356 misc_func_recorded
= 0;
2361 /* Data variables are recorded in the minimal symbol
2362 table, except for section symbols. */
2363 if (*namestring
!= '.')
2364 record_minimal_symbol
2365 (reader
, namestring
, symbol
.n_value
,
2366 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2367 symbol
.n_scnum
, objfile
);
2372 warning (_("More than one XMC_TC0 symbol found."));
2373 toc_offset
= symbol
.n_value
;
2375 /* Make TOC offset relative to start address of
2377 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2379 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2383 /* These symbols tell us where the TOC entry for a
2384 variable is, not the variable itself. */
2393 switch (csect_aux
.x_csect
.x_smclas
)
2396 /* A function entry point. */
2398 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2399 first_fun_line_offset
=
2400 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2402 record_minimal_symbol
2403 (reader
, namestring
, symbol
.n_value
,
2404 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2405 symbol
.n_scnum
, objfile
);
2406 misc_func_recorded
= 1;
2410 /* shared library function trampoline code entry
2413 /* record trampoline code entries as
2414 mst_solib_trampoline symbol. When we lookup mst
2415 symbols, we will choose mst_text over
2416 mst_solib_trampoline. */
2417 record_minimal_symbol
2418 (reader
, namestring
, symbol
.n_value
,
2419 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2420 misc_func_recorded
= 1;
2424 /* The symbols often have the same names as
2425 debug symbols for functions, and confuse
2431 /* xlc puts each variable in a separate csect,
2432 so we get an XTY_SD for each variable. But
2433 gcc puts several variables in a csect, so
2434 that each variable only gets an XTY_LD. We
2435 still need to record them. This will
2436 typically be XMC_RW; I suspect XMC_RO and
2437 XMC_BS might be possible too. */
2438 if (*namestring
!= '.')
2439 record_minimal_symbol
2440 (reader
, namestring
, symbol
.n_value
,
2441 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2442 symbol
.n_scnum
, objfile
);
2448 switch (csect_aux
.x_csect
.x_smclas
)
2452 /* Common variables are recorded in the minimal symbol
2453 table, except for section symbols. */
2454 if (*namestring
!= '.')
2455 record_minimal_symbol
2456 (reader
, namestring
, symbol
.n_value
,
2457 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2458 symbol
.n_scnum
, objfile
);
2470 unsigned int symnum_before
;
2472 symnum_before
= ssymnum
;
2473 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2476 /* See if the last csect needs to be recorded. */
2478 if (last_csect_name
&& !misc_func_recorded
)
2480 /* If no misc. function recorded in the last seen csect, enter
2481 it as a function. This will take care of functions like
2482 strcmp() compiled by xlc. */
2484 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2485 mst_text
, last_csect_sec
, objfile
);
2486 misc_func_recorded
= 1;
2491 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2492 includes_used
, symnum_before
,
2493 dependency_list
, dependencies_used
,
2496 dependencies_used
= 0;
2498 first_fun_line_offset
= 0;
2500 /* XCOFF, according to the AIX 3.2 documentation, puts the
2501 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2502 do things the standard COFF way and put it in the auxent.
2503 We use the auxent if the symbol is ".file" and an auxent
2504 exists, otherwise use the symbol itself. */
2505 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2507 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2510 filestring
= namestring
;
2512 pst
= xcoff_start_psymtab (objfile
,
2515 objfile
->global_psymbols
,
2516 objfile
->static_psymbols
);
2517 last_csect_name
= NULL
;
2523 complaint (&symfile_complaints
,
2524 _("Storage class %d not recognized during scan"),
2529 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2530 to handle only the C_FUN and C_EXT. */
2545 /* C_EINCL means we are switching back to the main file. But there
2546 is no reason to care; the only thing we want to know about
2547 includes is the names of all the included (.h) files. */
2552 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2556 /* I don't think the name of the common block (as opposed to the
2557 variables within it) is something which is user visible
2565 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2566 so C_LSYM would appear to be only for locals. */
2572 /* We probably could save a few instructions by assuming that
2573 C_LSYM, C_PSYM, etc., never have auxents. */
2574 int naux1
= symbol
.n_numaux
+ 1;
2577 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2583 /* Mark down an include file in the current psymtab. */
2584 enum language tmp_language
;
2586 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2589 tmp_language
= deduce_language_from_filename (namestring
);
2591 /* Only change the psymtab's language if we've learned
2592 something useful (eg. tmp_language is not language_unknown).
2593 In addition, to match what start_subfile does, never change
2595 if (tmp_language
!= language_unknown
2596 && (tmp_language
!= language_c
2597 || psymtab_language
!= language_cplus
))
2598 psymtab_language
= tmp_language
;
2600 /* In C++, one may expect the same filename to come round many
2601 times, when code is coming alternately from the main file
2602 and from inline functions in other files. So I check to see
2603 if this is a file we've seen before -- either the main
2604 source file, or a previously included file.
2606 This seems to be a lot of time to be spending on N_SOL, but
2607 things like "break c-exp.y:435" need to work (I
2608 suppose the psymtab_include_list could be hashed or put
2609 in a binary tree, if profiling shows this is a major hog). */
2610 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2616 for (i
= 0; i
< includes_used
; i
++)
2617 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2625 psymtab_include_list
[includes_used
++] = namestring
;
2626 if (includes_used
>= includes_allocated
)
2628 const char **orig
= psymtab_include_list
;
2630 psymtab_include_list
= (const char **)
2631 alloca ((includes_allocated
*= 2) *
2632 sizeof (const char *));
2633 memcpy (psymtab_include_list
, orig
,
2634 includes_used
* sizeof (const char *));
2639 /* The value of the C_FUN is not the address of the function (it
2640 appears to be the address before linking), but as long as it
2641 is smaller than the actual address, then find_pc_partial_function
2642 will use the minimal symbols instead. I hope. */
2651 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2654 p
= strchr (namestring
, ':');
2656 continue; /* Not a debugging symbol. */
2658 /* Main processing section for debugging symbols which
2659 the initial read through the symbol tables needs to worry
2660 about. If we reach this point, the symbol which we are
2661 considering is definitely one we are interested in.
2662 p must also contain the (valid) index into the namestring
2663 which indicates the debugging type symbol. */
2668 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2669 SECT_OFF_DATA (objfile
));
2671 if (gdbarch_static_transform_name_p (gdbarch
))
2672 namestring
= gdbarch_static_transform_name
2673 (gdbarch
, namestring
);
2675 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2676 VAR_DOMAIN
, LOC_STATIC
,
2677 &objfile
->static_psymbols
,
2679 psymtab_language
, objfile
);
2683 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2684 SECT_OFF_DATA (objfile
));
2685 /* The addresses in these entries are reported to be
2686 wrong. See the code that reads 'G's for symtabs. */
2687 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2688 VAR_DOMAIN
, LOC_STATIC
,
2689 &objfile
->global_psymbols
,
2691 psymtab_language
, objfile
);
2695 /* When a 'T' entry is defining an anonymous enum, it
2696 may have a name which is the empty string, or a
2697 single space. Since they're not really defining a
2698 symbol, those shouldn't go in the partial symbol
2699 table. We do pick up the elements of such enums at
2700 'check_enum:', below. */
2701 if (p
>= namestring
+ 2
2702 || (p
== namestring
+ 1
2703 && namestring
[0] != ' '))
2705 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2706 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2707 &objfile
->static_psymbols
,
2708 0, psymtab_language
, objfile
);
2711 /* Also a typedef with the same name. */
2712 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2713 VAR_DOMAIN
, LOC_TYPEDEF
,
2714 &objfile
->static_psymbols
,
2715 0, psymtab_language
, objfile
);
2722 if (p
!= namestring
) /* a name is there, not just :T... */
2724 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2725 VAR_DOMAIN
, LOC_TYPEDEF
,
2726 &objfile
->static_psymbols
,
2727 0, psymtab_language
, objfile
);
2730 /* If this is an enumerated type, we need to
2731 add all the enum constants to the partial symbol
2732 table. This does not cover enums without names, e.g.
2733 "enum {a, b} c;" in C, but fortunately those are
2734 rare. There is no way for GDB to find those from the
2735 enum type without spending too much time on it. Thus
2736 to solve this problem, the compiler needs to put out the
2737 enum in a nameless type. GCC2 does this. */
2739 /* We are looking for something of the form
2740 <name> ":" ("t" | "T") [<number> "="] "e"
2741 {<constant> ":" <value> ","} ";". */
2743 /* Skip over the colon and the 't' or 'T'. */
2745 /* This type may be given a number. Also, numbers can come
2746 in pairs like (0,26). Skip over it. */
2747 while ((*p
>= '0' && *p
<= '9')
2748 || *p
== '(' || *p
== ',' || *p
== ')'
2754 /* The aix4 compiler emits extra crud before the
2758 /* Skip over the type (?). */
2762 /* Skip over the colon. */
2766 /* We have found an enumerated type. */
2767 /* According to comments in read_enum_type
2768 a comma could end it instead of a semicolon.
2769 I don't know where that happens.
2771 while (*p
&& *p
!= ';' && *p
!= ',')
2775 /* Check for and handle cretinous dbx symbol name
2777 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2778 p
= next_symbol_text (objfile
);
2780 /* Point to the character after the name
2781 of the enum constant. */
2782 for (q
= p
; *q
&& *q
!= ':'; q
++)
2784 /* Note that the value doesn't matter for
2785 enum constants in psymtabs, just in symtabs. */
2786 add_psymbol_to_list (p
, q
- p
, 1,
2787 VAR_DOMAIN
, LOC_CONST
,
2788 &objfile
->static_psymbols
,
2789 0, psymtab_language
, objfile
);
2790 /* Point past the name. */
2792 /* Skip over the value. */
2793 while (*p
&& *p
!= ',')
2795 /* Advance past the comma. */
2803 /* Constant, e.g. from "const" in Pascal. */
2804 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2805 VAR_DOMAIN
, LOC_CONST
,
2806 &objfile
->static_psymbols
,
2807 0, psymtab_language
, objfile
);
2813 int name_len
= p
- namestring
;
2814 char *name
= (char *) xmalloc (name_len
+ 1);
2816 memcpy (name
, namestring
, name_len
);
2817 name
[name_len
] = '\0';
2818 function_outside_compilation_unit_complaint (name
);
2821 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2822 SECT_OFF_TEXT (objfile
));
2823 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2824 VAR_DOMAIN
, LOC_BLOCK
,
2825 &objfile
->static_psymbols
,
2827 psymtab_language
, objfile
);
2830 /* Global functions were ignored here, but now they
2831 are put into the global psymtab like one would expect.
2832 They're also in the minimal symbol table. */
2836 int name_len
= p
- namestring
;
2837 char *name
= (char *) xmalloc (name_len
+ 1);
2839 memcpy (name
, namestring
, name_len
);
2840 name
[name_len
] = '\0';
2841 function_outside_compilation_unit_complaint (name
);
2845 /* We need only the minimal symbols for these
2846 loader-generated definitions. Keeping the global
2847 symbols leads to "in psymbols but not in symbols"
2849 if (startswith (namestring
, "@FIX"))
2852 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2853 SECT_OFF_TEXT (objfile
));
2854 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2855 VAR_DOMAIN
, LOC_BLOCK
,
2856 &objfile
->global_psymbols
,
2858 psymtab_language
, objfile
);
2861 /* Two things show up here (hopefully); static symbols of
2862 local scope (static used inside braces) or extensions
2863 of structure symbols. We can ignore both. */
2877 case '#': /* For symbol identification (used in
2882 /* It is a C++ nested symbol. We don't need to record it
2883 (I don't think); if we try to look up foo::bar::baz,
2884 then symbols for the symtab containing foo should get
2885 read in, I think. */
2886 /* Someone says sun cc puts out symbols like
2887 /foo/baz/maclib::/usr/local/bin/maclib,
2888 which would get here with a symbol type of ':'. */
2892 /* Unexpected symbol descriptor. The second and
2893 subsequent stabs of a continued stab can show up
2894 here. The question is whether they ever can mimic
2895 a normal stab--it would be nice if not, since we
2896 certainly don't want to spend the time searching to
2897 the end of every string looking for a
2900 complaint (&symfile_complaints
,
2901 _("unknown symbol descriptor `%c'"), p
[1]);
2903 /* Ignore it; perhaps it is an extension that we don't
2913 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2914 ssymnum
, dependency_list
,
2915 dependencies_used
, textlow_not_set
);
2918 /* Record the toc offset value of this symbol table into objfile
2919 structure. If no XMC_TC0 is found, toc_offset should be zero.
2920 Another place to obtain this information would be file auxiliary
2923 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2926 /* Return the toc offset value for a given objfile. */
2929 xcoff_get_toc_offset (struct objfile
*objfile
)
2932 return XCOFF_DATA (objfile
)->toc_offset
;
2936 /* Scan and build partial symbols for a symbol file.
2937 We have been initialized by a call to dbx_symfile_init, which
2938 put all the relevant info into a "struct dbx_symfile_info",
2939 hung off the objfile structure.
2941 SECTION_OFFSETS contains offsets relative to which the symbols in the
2942 various sections are (depending where the sections were actually
2946 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2950 int num_symbols
; /* # of symbols */
2951 file_ptr symtab_offset
; /* symbol table and */
2952 file_ptr stringtab_offset
; /* string table file offsets */
2953 struct coff_symfile_info
*info
;
2957 info
= XCOFF_DATA (objfile
);
2958 symfile_bfd
= abfd
= objfile
->obfd
;
2959 name
= objfile_name (objfile
);
2961 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2962 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2963 stringtab_offset
= symtab_offset
+
2964 num_symbols
* coff_data (abfd
)->local_symesz
;
2966 info
->min_lineno_offset
= 0;
2967 info
->max_lineno_offset
= 0;
2968 bfd_map_over_sections (abfd
, find_linenos
, info
);
2970 if (num_symbols
> 0)
2972 /* Read the string table. */
2973 init_stringtab (abfd
, stringtab_offset
, objfile
);
2975 /* Read the .debug section, if present. */
2977 struct bfd_section
*secp
;
2978 bfd_size_type length
;
2979 bfd_byte
*debugsec
= NULL
;
2981 secp
= bfd_get_section_by_name (abfd
, ".debug");
2984 length
= bfd_section_size (abfd
, secp
);
2988 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2991 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2993 error (_("Error reading .debug section of `%s': %s"),
2994 name
, bfd_errmsg (bfd_get_error ()));
2998 info
->debugsec
= (char *) debugsec
;
3002 /* Read the symbols. We keep them in core because we will want to
3003 access them randomly in read_symbol*. */
3004 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
3006 error (_("Error reading symbols from %s: %s"),
3007 name
, bfd_errmsg (bfd_get_error ()));
3008 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
3009 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
3010 info
->symtbl_num_syms
= num_symbols
;
3012 val
= bfd_bread (info
->symtbl
, size
, abfd
);
3014 perror_with_name (_("reading symbol table"));
3016 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3017 if (objfile
->global_psymbols
.capacity () == 0
3018 && objfile
->static_psymbols
.capacity () == 0)
3019 /* I'm not sure how how good num_symbols is; the rule of thumb in
3020 init_psymbol_list was developed for a.out. On the one hand,
3021 num_symbols includes auxents. On the other hand, it doesn't
3023 init_psymbol_list (objfile
, num_symbols
);
3025 free_pending_blocks ();
3027 scoped_free_pendings free_pending
;
3028 minimal_symbol_reader
reader (objfile
);
3030 /* Now that the symbol table data of the executable file are all in core,
3031 process them and define symbols accordingly. */
3033 scan_xcoff_symtab (reader
, objfile
);
3035 /* Install any minimal symbols that have been collected as the current
3036 minimal symbols for this objfile. */
3040 /* DWARF2 sections. */
3042 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3043 dwarf2_build_psymtabs (objfile
);
3045 dwarf2_build_frame_info (objfile
);
3049 xcoff_symfile_offsets (struct objfile
*objfile
,
3050 const struct section_addr_info
*addrs
)
3052 const char *first_section_name
;
3054 default_symfile_offsets (objfile
, addrs
);
3056 /* Oneof the weird side-effects of default_symfile_offsets is that
3057 it sometimes sets some section indices to zero for sections that,
3058 in fact do not exist. See the body of default_symfile_offsets
3059 for more info on when that happens. Undo that, as this then allows
3060 us to test whether the associated section exists or not, and then
3061 access it quickly (without searching it again). */
3063 if (objfile
->num_sections
== 0)
3064 return; /* Is that even possible? Better safe than sorry. */
3067 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3069 if (objfile
->sect_index_text
== 0
3070 && strcmp (first_section_name
, ".text") != 0)
3071 objfile
->sect_index_text
= -1;
3073 if (objfile
->sect_index_data
== 0
3074 && strcmp (first_section_name
, ".data") != 0)
3075 objfile
->sect_index_data
= -1;
3077 if (objfile
->sect_index_bss
== 0
3078 && strcmp (first_section_name
, ".bss") != 0)
3079 objfile
->sect_index_bss
= -1;
3081 if (objfile
->sect_index_rodata
== 0
3082 && strcmp (first_section_name
, ".rodata") != 0)
3083 objfile
->sect_index_rodata
= -1;
3086 /* Register our ability to parse symbols for xcoff BFD files. */
3088 static const struct sym_fns xcoff_sym_fns
=
3091 /* It is possible that coff and xcoff should be merged as
3092 they do have fundamental similarities (for example, the extra storage
3093 classes used for stabs could presumably be recognized in any COFF file).
3094 However, in addition to obvious things like all the csect hair, there are
3095 some subtler differences between xcoffread.c and coffread.c, notably
3096 the fact that coffread.c has no need to read in all the symbols, but
3097 xcoffread.c reads all the symbols and does in fact randomly access them
3098 (in C_BSTAT and line number processing). */
3100 xcoff_new_init
, /* init anything gbl to entire symtab */
3101 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3102 xcoff_initial_scan
, /* read a symbol file into symtab */
3103 NULL
, /* sym_read_psymbols */
3104 xcoff_symfile_finish
, /* finished with file, cleanup */
3105 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3106 default_symfile_segments
, /* Get segment information from a file. */
3107 aix_process_linenos
,
3108 default_symfile_relocate
, /* Relocate a debug section. */
3109 NULL
, /* sym_probe_fns */
3113 /* Same as xcoff_get_n_import_files, but for core files. */
3116 xcoff_get_core_n_import_files (bfd
*abfd
)
3118 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3120 file_ptr offset
= 0;
3124 return -1; /* Not a core file. */
3126 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3132 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3134 next
= bfd_get_32 (abfd
, buf
);
3136 break; /* This is the last entry. */
3140 /* Return the number of entries, excluding the first one, which is
3141 the path to the executable that produced this core file. */
3142 return n_entries
- 1;
3145 /* Return the number of import files (shared libraries) that the given
3146 BFD depends on. Return -1 if this number could not be computed. */
3149 xcoff_get_n_import_files (bfd
*abfd
)
3151 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3155 /* If the ".loader" section does not exist, the objfile is probably
3156 not an executable. Might be a core file... */
3158 return xcoff_get_core_n_import_files (abfd
);
3160 /* The number of entries in the Import Files Table is stored in
3161 field l_nimpid. This field is always at offset 16, and is
3162 always 4 bytes long. Read those 4 bytes. */
3164 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3166 l_nimpid
= bfd_get_32 (abfd
, buf
);
3168 /* By convention, the first entry is the default LIBPATH value
3169 to be used by the system loader, so it does not count towards
3170 the number of import files. */
3171 return l_nimpid
- 1;
3174 /* Free the per-objfile xcoff data. */
3177 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3183 _initialize_xcoffread (void)
3185 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3187 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,