1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2018 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 */
177 { NULL
, NULL
}, /* debug_names */
178 { NULL
, NULL
}, /* debug_aranges */
183 bf_notfound_complaint (void)
185 complaint (_("line numbers off, `.bf' symbol not found"));
189 ef_complaint (int arg1
)
191 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
195 eb_complaint (int arg1
)
197 complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
200 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
202 static void scan_xcoff_symtab (minimal_symbol_reader
&,
205 static const char *xcoff_next_symbol_text (struct objfile
*);
207 static void record_include_begin (struct coff_symbol
*);
210 enter_line_range (struct subfile
*, unsigned, unsigned,
211 CORE_ADDR
, CORE_ADDR
, unsigned *);
213 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
215 static void xcoff_symfile_init (struct objfile
*);
217 static void xcoff_new_init (struct objfile
*);
219 static void xcoff_symfile_finish (struct objfile
*);
221 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
223 static void read_symbol (struct internal_syment
*, int);
225 static int read_symbol_lineno (int);
227 static CORE_ADDR
read_symbol_nvalue (int);
229 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
232 static void read_xcoff_symtab (struct objfile
*, struct partial_symtab
*);
235 static void add_stab_to_list (char *, struct pending_stabs
**);
238 static int compare_lte (const void *, const void *);
240 static struct linetable
*arrange_linetable (struct linetable
*);
242 static void record_include_end (struct coff_symbol
*);
244 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
247 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
249 static int secnum_to_section (int, struct objfile
*);
250 static asection
*secnum_to_bfd_section (int, struct objfile
*);
252 struct find_targ_sec_arg
257 struct objfile
*objfile
;
260 static void find_targ_sec (bfd
*, asection
*, void *);
263 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
265 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
266 struct objfile
*objfile
= args
->objfile
;
268 if (sect
->target_index
== args
->targ_index
)
270 /* This is the section. Figure out what SECT_OFF_* code it is. */
271 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
272 *args
->resultp
= SECT_OFF_TEXT (objfile
);
273 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
274 *args
->resultp
= SECT_OFF_DATA (objfile
);
276 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
277 *args
->bfd_sect
= sect
;
281 /* Search all BFD sections for the section whose target_index is
282 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
283 associated index in the objfile's section_offset table is also
286 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
287 is set to the text section's number. */
290 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
291 asection
**bfd_sect
, int *secnum
)
293 struct find_targ_sec_arg args
;
295 args
.targ_index
= n_scnum
;
296 args
.resultp
= secnum
;
297 args
.bfd_sect
= bfd_sect
;
298 args
.objfile
= objfile
;
301 *secnum
= SECT_OFF_TEXT (objfile
);
303 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
306 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
309 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
314 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
318 /* Return the BFD section that N_SCNUM points to. */
321 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
326 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
330 /* add a given stab string into given stab vector. */
335 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
337 if (*stabvector
== NULL
)
339 *stabvector
= (struct pending_stabs
*)
340 xmalloc (sizeof (struct pending_stabs
) +
341 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
342 (*stabvector
)->count
= 0;
343 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
345 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
347 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
348 *stabvector
= (struct pending_stabs
*)
349 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
350 (*stabvector
)->length
* sizeof (char *));
352 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
357 /* Linenos are processed on a file-by-file basis.
361 1) xlc (IBM's native c compiler) postpones static function code
362 emission to the end of a compilation unit. This way it can
363 determine if those functions (statics) are needed or not, and
364 can do some garbage collection (I think). This makes line
365 numbers and corresponding addresses unordered, and we end up
366 with a line table like:
383 and that breaks gdb's binary search on line numbers, if the
384 above table is not sorted on line numbers. And that sort
385 should be on function based, since gcc can emit line numbers
388 10 0x100 - for the init/test part of a for stmt.
391 10 0x400 - for the increment part of a for stmt.
393 arrange_linetable() will do this sorting.
395 2) aix symbol table might look like:
397 c_file // beginning of a new file
398 .bi // beginning of include file
399 .ei // end of include file
403 basically, .bi/.ei pairs do not necessarily encapsulate
404 their scope. They need to be recorded, and processed later
405 on when we come the end of the compilation unit.
406 Include table (inclTable) and process_linenos() handle
412 /* compare line table entry addresses. */
415 compare_lte (const void *lte1p
, const void *lte2p
)
417 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
418 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
420 return lte1
->pc
- lte2
->pc
;
423 /* Given a line table with function entries are marked, arrange its
424 functions in ascending order and strip off function entry markers
425 and return it in a newly created table. If the old one is good
426 enough, return the old one. */
427 /* FIXME: I think all this stuff can be replaced by just passing
428 sort_linevec = 1 to end_symtab. */
430 static struct linetable
*
431 arrange_linetable (struct linetable
*oldLineTb
)
433 int ii
, jj
, newline
, /* new line count */
434 function_count
; /* # of functions */
436 struct linetable_entry
*fentry
; /* function entry vector */
437 int fentry_size
; /* # of function entries */
438 struct linetable
*newLineTb
; /* new line table */
441 #define NUM_OF_FUNCTIONS 20
443 fentry_size
= NUM_OF_FUNCTIONS
;
444 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
446 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
448 if (oldLineTb
->item
[ii
].line
== 0)
449 { /* Function entry found. */
450 if (function_count
>= fentry_size
)
451 { /* Make sure you have room. */
453 fentry
= (struct linetable_entry
*)
455 fentry_size
* sizeof (struct linetable_entry
));
457 fentry
[function_count
].line
= ii
;
458 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
461 /* If the function was compiled with XLC, we may have to add an
462 extra line entry later. Reserve space for that. */
463 if (ii
+ 1 < oldLineTb
->nitems
464 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
469 if (function_count
== 0)
474 else if (function_count
> 1)
475 qsort (fentry
, function_count
,
476 sizeof (struct linetable_entry
), compare_lte
);
478 /* Allocate a new line table. */
479 newLineTb
= (struct linetable
*)
481 (sizeof (struct linetable
) +
482 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
484 /* If line table does not start with a function beginning, copy up until
488 if (oldLineTb
->item
[0].line
!= 0)
490 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
491 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
493 /* Now copy function lines one by one. */
495 for (ii
= 0; ii
< function_count
; ++ii
)
497 /* If the function was compiled with XLC, we may have to add an
498 extra line to cover the function prologue. */
499 jj
= fentry
[ii
].line
;
500 if (jj
+ 1 < oldLineTb
->nitems
501 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
503 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
504 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
508 for (jj
= fentry
[ii
].line
+ 1;
509 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
511 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
514 /* The number of items in the line table must include these
515 extra lines which were added in case of XLC compiled functions. */
516 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
520 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
521 following `IncludeChain'. At the end of each symtab (end_symtab),
522 we will determine if we should create additional symtab's to
523 represent if (the include files. */
526 typedef struct _inclTable
528 char *name
; /* include filename */
530 /* Offsets to the line table. end points to the last entry which is
531 part of this include file. */
534 struct subfile
*subfile
;
535 unsigned funStartLine
; /* Start line # of its function. */
539 #define INITIAL_INCLUDE_TABLE_LENGTH 20
540 static InclTable
*inclTable
; /* global include table */
541 static int inclIndx
; /* last entry to table */
542 static int inclLength
; /* table length */
543 static int inclDepth
; /* nested include depth */
545 static void allocate_include_entry (void);
548 record_include_begin (struct coff_symbol
*cs
)
552 /* In xcoff, we assume include files cannot be nested (not in .c files
553 of course, but in corresponding .s files.). */
555 /* This can happen with old versions of GCC.
556 GCC 2.3.3-930426 does not exhibit this on a test case which
557 a user said produced the message for him. */
558 complaint (_("Nested C_BINCL symbols"));
562 allocate_include_entry ();
564 inclTable
[inclIndx
].name
= cs
->c_name
;
565 inclTable
[inclIndx
].begin
= cs
->c_value
;
569 record_include_end (struct coff_symbol
*cs
)
575 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
578 allocate_include_entry ();
580 pTbl
= &inclTable
[inclIndx
];
581 pTbl
->end
= cs
->c_value
;
588 allocate_include_entry (void)
590 if (inclTable
== NULL
)
592 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
593 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
596 else if (inclIndx
>= inclLength
)
598 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
599 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
600 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
601 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
605 /* Global variable to pass the psymtab down to all the routines involved
606 in psymtab to symtab processing. */
607 static struct partial_symtab
*this_symtab_psymtab
;
609 /* Objfile related to this_symtab_psymtab; set at the same time. */
610 static struct objfile
*this_symtab_objfile
;
612 /* given the start and end addresses of a compilation unit (or a csect,
613 at times) process its lines and create appropriate line vectors. */
616 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
620 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
622 /* subfile structure for the main compilation unit. */
623 struct subfile main_subfile
;
625 /* In the main source file, any time we see a function entry, we
626 reset this variable to function's absolute starting line number.
627 All the following line numbers in the function are relative to
628 this, and we record absolute line numbers in record_line(). */
630 unsigned int main_source_baseline
= 0;
635 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
637 goto return_after_cleanup
;
639 memset (&main_subfile
, '\0', sizeof (main_subfile
));
642 /* All source lines were in the main source file. None in include
645 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
646 &main_source_baseline
);
650 /* There was source with line numbers in include files. */
653 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
654 main_source_baseline
= 0;
656 for (ii
= 0; ii
< inclIndx
; ++ii
)
658 struct subfile
*tmpSubfile
;
660 /* If there is main file source before include file, enter it. */
661 if (offset
< inclTable
[ii
].begin
)
664 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
665 start
, 0, &main_source_baseline
);
668 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
670 /* The entry in the include table refers to the main source
671 file. Add the lines to the main subfile. */
673 main_source_baseline
= inclTable
[ii
].funStartLine
;
675 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
676 start
, 0, &main_source_baseline
);
677 inclTable
[ii
].subfile
= &main_subfile
;
681 /* Have a new subfile for the include file. */
683 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
685 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
686 firstLine
= &(inclTable
[ii
].funStartLine
);
688 /* Enter include file's lines now. */
689 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
690 inclTable
[ii
].end
, start
, 0, firstLine
);
693 if (offset
<= inclTable
[ii
].end
)
694 offset
= inclTable
[ii
].end
+ linesz
;
697 /* All the include files' line have been processed at this point. Now,
698 enter remaining lines of the main file, if any left. */
699 if (offset
< max_offset
+ 1 - linesz
)
701 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
702 &main_source_baseline
);
706 /* Process main file's line numbers. */
707 if (main_subfile
.line_vector
)
709 struct linetable
*lineTb
, *lv
;
711 lv
= main_subfile
.line_vector
;
713 /* Line numbers are not necessarily ordered. xlc compilation will
714 put static function to the end. */
716 lineTb
= arrange_linetable (lv
);
719 current_subfile
->line_vector
= (struct linetable
*)
720 xrealloc (lv
, (sizeof (struct linetable
)
721 + lv
->nitems
* sizeof (struct linetable_entry
)));
726 current_subfile
->line_vector
= lineTb
;
729 current_subfile
->line_vector_length
=
730 current_subfile
->line_vector
->nitems
;
733 /* Now, process included files' line numbers. */
735 for (ii
= 0; ii
< inclIndx
; ++ii
)
737 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
738 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
741 struct linetable
*lineTb
, *lv
;
743 lv
= (inclTable
[ii
].subfile
)->line_vector
;
745 /* Line numbers are not necessarily ordered. xlc compilation will
746 put static function to the end. */
748 lineTb
= arrange_linetable (lv
);
752 /* For the same include file, we might want to have more than one
753 subfile. This happens if we have something like:
761 while foo.h including code in it. (stupid but possible)
762 Since start_subfile() looks at the name and uses an
763 existing one if finds, we need to provide a fake name and
767 start_subfile (inclTable
[ii
].name
);
770 /* Pick a fake name that will produce the same results as this
771 one when passed to deduce_language_from_filename. Kludge on
773 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
775 if (fakename
== NULL
)
777 start_subfile (fakename
);
778 xfree (current_subfile
->name
);
780 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
785 current_subfile
->line_vector
=
786 (struct linetable
*) xrealloc
787 (lv
, (sizeof (struct linetable
)
788 + lv
->nitems
* sizeof (struct linetable_entry
)));
794 current_subfile
->line_vector
= lineTb
;
797 current_subfile
->line_vector_length
=
798 current_subfile
->line_vector
->nitems
;
799 start_subfile (pop_subfile ());
803 return_after_cleanup
:
805 /* We don't want to keep alloc/free'ing the global include file table. */
810 aix_process_linenos (struct objfile
*objfile
)
812 /* There is no linenos to read if there are only dwarf info. */
813 if (this_symtab_psymtab
== NULL
)
816 /* Process line numbers and enter them into line vector. */
817 process_linenos (last_source_start_addr
, cur_src_end_addr
);
821 /* Enter a given range of lines into the line vector.
822 can be called in the following two ways:
823 enter_line_range (subfile, beginoffset, endoffset,
824 startaddr, 0, firstLine) or
825 enter_line_range (subfile, beginoffset, 0,
826 startaddr, endaddr, firstLine)
828 endoffset points to the last line table entry that we should pay
832 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
833 unsigned endoffset
, /* offsets to line table */
834 CORE_ADDR startaddr
, /* offsets to line table */
835 CORE_ADDR endaddr
, unsigned *firstLine
)
837 struct objfile
*objfile
= this_symtab_objfile
;
838 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
839 unsigned int curoffset
;
842 struct internal_lineno int_lnno
;
843 unsigned int limit_offset
;
847 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
849 curoffset
= beginoffset
;
850 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
854 if (endoffset
>= limit_offset
)
856 complaint (_("Bad line table offset in C_EINCL directive"));
859 limit_offset
= endoffset
;
864 abfd
= objfile
->obfd
;
865 linesz
= coff_data (abfd
)->local_linesz
;
866 ext_lnno
= alloca (linesz
);
868 while (curoffset
<= limit_offset
)
870 bfd_seek (abfd
, curoffset
, SEEK_SET
);
871 bfd_bread (ext_lnno
, linesz
, abfd
);
872 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
874 /* Find the address this line represents. */
875 addr
= (int_lnno
.l_lnno
876 ? int_lnno
.l_addr
.l_paddr
877 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
878 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
880 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
883 if (int_lnno
.l_lnno
== 0)
885 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
886 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
890 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
891 gdbarch_addr_bits_remove (gdbarch
, addr
));
897 /* Save the vital information for use when closing off the current file.
898 NAME is the file name the symbols came from, START_ADDR is the first
899 text address for the file, and SIZE is the number of bytes of text. */
901 #define complete_symtab(name, start_addr) { \
902 set_last_source_file (name); \
903 last_source_start_addr = start_addr; \
907 /* Refill the symbol table input buffer
908 and set the variables that control fetching entries from it.
909 Reports an error if no data available.
910 This function can read past the end of the symbol table
911 (into the string table) but this does no harm. */
913 /* Create a new minimal symbol (using record_with_info).
915 Creation of all new minimal symbols should go through this function
916 rather than calling the various record functions in order
917 to make sure that all symbol addresses get properly relocated.
921 NAME - the symbol's name (but if NAME starts with a period, that
922 leading period is discarded).
923 ADDRESS - the symbol's address, prior to relocation. This function
924 relocates the address before recording the minimal symbol.
925 MS_TYPE - the symbol's type.
926 N_SCNUM - the symbol's XCOFF section number.
927 OBJFILE - the objfile associated with the minimal symbol. */
930 record_minimal_symbol (minimal_symbol_reader
&reader
,
931 const char *name
, CORE_ADDR address
,
932 enum minimal_symbol_type ms_type
,
934 struct objfile
*objfile
)
939 reader
.record_with_info (name
, address
, ms_type
,
940 secnum_to_section (n_scnum
, objfile
));
943 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
944 nested. At any given time, a symbol can only be in one static block.
945 This is the base address of current static block, zero if non exists. */
947 static int static_block_base
= 0;
949 /* Section number for the current static block. */
951 static int static_block_section
= -1;
953 /* true if space for symbol name has been allocated. */
955 static int symname_alloced
= 0;
957 /* Next symbol to read. Pointer into raw seething symbol table. */
959 static char *raw_symbol
;
961 /* This is the function which stabsread.c calls to get symbol
965 xcoff_next_symbol_text (struct objfile
*objfile
)
967 struct internal_syment symbol
;
970 /* FIXME: is this the same as the passed arg? */
971 if (this_symtab_objfile
)
972 objfile
= this_symtab_objfile
;
974 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
977 complaint (_("Unexpected symbol continuation"));
979 /* Return something which points to '\0' and hope the symbol reading
980 code does something reasonable. */
983 else if (symbol
.n_sclass
& 0x80)
985 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
986 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
991 complaint (_("Unexpected symbol continuation"));
993 /* Return something which points to '\0' and hope the symbol reading
994 code does something reasonable. */
1000 /* Read symbols for a given partial symbol table. */
1003 read_xcoff_symtab (struct objfile
*objfile
, struct partial_symtab
*pst
)
1005 bfd
*abfd
= objfile
->obfd
;
1006 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1007 struct coff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1008 char *strtbl
= xcoff
->strtbl
;
1009 char *debugsec
= xcoff
->debugsec
;
1010 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1012 struct internal_syment symbol
[1];
1013 union internal_auxent main_aux
;
1014 struct coff_symbol cs
[1];
1015 CORE_ADDR file_start_addr
= 0;
1016 CORE_ADDR file_end_addr
= 0;
1018 int next_file_symnum
= -1;
1019 unsigned int max_symnum
;
1020 int just_started
= 1;
1022 CORE_ADDR fcn_start_addr
= 0;
1024 struct coff_symbol fcn_stab_saved
= { 0 };
1026 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1027 union internal_auxent fcn_aux_saved
= main_aux
;
1028 struct context_stack
*newobj
;
1030 const char *filestring
= pst
->filename
; /* Name of the current file. */
1032 const char *last_csect_name
; /* Last seen csect's name. */
1034 this_symtab_psymtab
= pst
;
1035 this_symtab_objfile
= objfile
;
1037 /* Get the appropriate COFF "constants" related to the file we're
1039 local_symesz
= coff_data (abfd
)->local_symesz
;
1041 set_last_source_file (NULL
);
1042 last_csect_name
= 0;
1045 start_symtab (objfile
, filestring
, (char *) NULL
, file_start_addr
,
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_", (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
,
1230 (CORE_ADDR
) 0, language_unknown
);
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,
1352 record_debugformat (debugfmt
);
1353 last_csect_name
= 0;
1355 /* reset file start and end addresses. A compilation unit
1356 with no text (only data) should have zero file
1358 file_start_addr
= file_end_addr
= 0;
1362 fcn_stab_saved
= *cs
;
1366 if (strcmp (cs
->c_name
, ".bf") == 0)
1368 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1369 SECT_OFF_TEXT (objfile
));
1371 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1372 0, cs
->c_naux
, &main_aux
);
1374 within_function
= 1;
1376 newobj
= push_context (0, fcn_start_addr
+ off
);
1378 newobj
->name
= define_symbol
1379 (fcn_cs_saved
.c_value
+ off
,
1380 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1381 if (newobj
->name
!= NULL
)
1382 SYMBOL_SECTION (newobj
->name
) = SECT_OFF_TEXT (objfile
);
1384 else if (strcmp (cs
->c_name
, ".ef") == 0)
1386 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1387 0, cs
->c_naux
, &main_aux
);
1389 /* The value of .ef is the address of epilogue code;
1390 not useful for gdb. */
1391 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1392 contains number of lines to '}' */
1394 if (context_stack_depth
<= 0)
1395 { /* We attempted to pop an empty context stack. */
1396 ef_complaint (cs
->c_symnum
);
1397 within_function
= 0;
1400 newobj
= pop_context ();
1401 /* Stack must be empty now. */
1402 if (context_stack_depth
> 0 || newobj
== NULL
)
1404 ef_complaint (cs
->c_symnum
);
1405 within_function
= 0;
1409 finish_block (newobj
->name
, &local_symbols
, newobj
->old_blocks
,
1410 NULL
, newobj
->start_addr
,
1411 (fcn_cs_saved
.c_value
1412 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1413 + ANOFFSET (objfile
->section_offsets
,
1414 SECT_OFF_TEXT (objfile
))));
1415 within_function
= 0;
1420 /* Begin static block. */
1422 struct internal_syment symbol
;
1424 read_symbol (&symbol
, cs
->c_value
);
1425 static_block_base
= symbol
.n_value
;
1426 static_block_section
=
1427 secnum_to_section (symbol
.n_scnum
, objfile
);
1432 /* End of static block. */
1433 static_block_base
= 0;
1434 static_block_section
= -1;
1445 complaint (_("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 (_("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 (_("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
= XOBNEW (&objfile
->objfile_obstack
, symloc
);
2096 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2097 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2098 subpst
->textlow
= 0;
2099 subpst
->texthigh
= 0;
2101 /* We could save slight bits of space by only making one of these,
2102 shared by the entire set of include files. FIXME-someday. */
2103 subpst
->dependencies
=
2104 XOBNEW (&objfile
->objfile_obstack
, struct partial_symtab
*);
2105 subpst
->dependencies
[0] = pst
;
2106 subpst
->number_of_dependencies
= 1;
2108 subpst
->globals_offset
=
2109 subpst
->n_global_syms
=
2110 subpst
->statics_offset
=
2111 subpst
->n_static_syms
= 0;
2114 subpst
->compunit_symtab
= NULL
;
2115 subpst
->read_symtab
= pst
->read_symtab
;
2118 if (num_includes
== 0
2119 && number_dependencies
== 0
2120 && pst
->n_global_syms
== 0
2121 && pst
->n_static_syms
== 0)
2123 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2124 it is on the obstack, but we can forget to chain it on the list. */
2125 /* Empty psymtabs happen as a result of header files which don't have
2126 any symbols in them. There can be a lot of them. */
2128 discard_psymtab (objfile
, pst
);
2130 /* Indicate that psymtab was thrown away. */
2136 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2137 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2138 the symbol and its auxents. */
2141 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2142 const char **name
, char **raw
, unsigned int *symnump
,
2143 struct objfile
*objfile
)
2145 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2146 if (symbol
->n_zeroes
)
2148 /* If it's exactly E_SYMNMLEN characters long it isn't
2150 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2152 /* FIXME: wastes memory for symbols which we don't end up putting
2153 into the minimal symbols. */
2156 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2158 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2159 p
[E_SYMNMLEN
] = '\0';
2163 /* Point to the unswapped name as that persists as long as the
2165 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2167 else if (symbol
->n_sclass
& 0x80)
2169 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2173 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2176 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2177 if (symbol
->n_numaux
> 0)
2179 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2180 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2182 *symnump
+= symbol
->n_numaux
;
2183 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2188 function_outside_compilation_unit_complaint (const char *arg1
)
2190 complaint (_("function `%s' appears to be defined "
2191 "outside of all compilation units"),
2196 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2197 struct objfile
*objfile
)
2199 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2200 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2201 const char *filestring
= NULL
;
2203 const char *namestring
;
2208 /* Current partial symtab */
2209 struct partial_symtab
*pst
;
2211 /* List of current psymtab's include files. */
2212 const char **psymtab_include_list
;
2213 int includes_allocated
;
2216 /* Index within current psymtab dependency list. */
2217 struct partial_symtab
**dependency_list
;
2218 int dependencies_used
, dependencies_allocated
;
2221 struct internal_syment symbol
;
2222 union internal_auxent main_aux
[5];
2223 unsigned int ssymnum
;
2225 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2226 CORE_ADDR last_csect_val
= 0;
2227 int last_csect_sec
= 0;
2228 int misc_func_recorded
= 0; /* true if any misc. function. */
2229 int textlow_not_set
= 1;
2231 pst
= (struct partial_symtab
*) 0;
2233 includes_allocated
= 30;
2235 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2236 sizeof (const char *));
2238 dependencies_allocated
= 30;
2239 dependencies_used
= 0;
2241 (struct partial_symtab
**) alloca (dependencies_allocated
*
2242 sizeof (struct partial_symtab
*));
2244 set_last_source_file (NULL
);
2246 abfd
= objfile
->obfd
;
2247 next_symbol_text_func
= xcoff_next_symbol_text
;
2249 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2250 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2252 while (ssymnum
< nsyms
)
2258 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2259 sclass
= symbol
.n_sclass
;
2267 /* The CSECT auxent--always the last auxent. */
2268 union internal_auxent csect_aux
;
2269 unsigned int symnum_before
= ssymnum
;
2271 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2273 if (symbol
.n_numaux
> 1)
2275 bfd_coff_swap_aux_in
2277 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2280 symbol
.n_numaux
- 1,
2285 csect_aux
= main_aux
[0];
2287 /* If symbol name starts with ".$" or "$", ignore it. */
2288 if (namestring
[0] == '$'
2289 || (namestring
[0] == '.' && namestring
[1] == '$'))
2292 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2295 switch (csect_aux
.x_csect
.x_smclas
)
2298 if (last_csect_name
)
2300 /* If no misc. function recorded in the last
2301 seen csect, enter it as a function. This
2302 will take care of functions like strcmp()
2305 if (!misc_func_recorded
)
2307 record_minimal_symbol
2308 (reader
, last_csect_name
, last_csect_val
,
2309 mst_text
, last_csect_sec
, objfile
);
2310 misc_func_recorded
= 1;
2315 /* We have to allocate one psymtab for
2316 each program csect, because their text
2317 sections need not be adjacent. */
2319 (objfile
, pst
, psymtab_include_list
,
2320 includes_used
, symnum_before
, dependency_list
,
2321 dependencies_used
, textlow_not_set
);
2323 dependencies_used
= 0;
2324 /* Give all psymtabs for this source file the same
2326 pst
= xcoff_start_psymtab
2330 objfile
->global_psymbols
,
2331 objfile
->static_psymbols
);
2334 /* Activate the misc_func_recorded mechanism for
2335 compiler- and linker-generated CSECTs like ".strcmp"
2337 if (namestring
&& (namestring
[0] == '.'
2338 || namestring
[0] == '@'))
2340 last_csect_name
= namestring
;
2341 last_csect_val
= symbol
.n_value
;
2342 last_csect_sec
= symbol
.n_scnum
;
2347 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2349 if (highval
> pst
->texthigh
)
2350 pst
->texthigh
= highval
;
2351 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2352 pst
->textlow
= symbol
.n_value
;
2354 misc_func_recorded
= 0;
2359 /* Data variables are recorded in the minimal symbol
2360 table, except for section symbols. */
2361 if (*namestring
!= '.')
2362 record_minimal_symbol
2363 (reader
, namestring
, symbol
.n_value
,
2364 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2365 symbol
.n_scnum
, objfile
);
2370 warning (_("More than one XMC_TC0 symbol found."));
2371 toc_offset
= symbol
.n_value
;
2373 /* Make TOC offset relative to start address of
2375 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2377 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2381 /* These symbols tell us where the TOC entry for a
2382 variable is, not the variable itself. */
2391 switch (csect_aux
.x_csect
.x_smclas
)
2394 /* A function entry point. */
2396 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2397 first_fun_line_offset
=
2398 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2400 record_minimal_symbol
2401 (reader
, namestring
, symbol
.n_value
,
2402 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2403 symbol
.n_scnum
, objfile
);
2404 misc_func_recorded
= 1;
2408 /* shared library function trampoline code entry
2411 /* record trampoline code entries as
2412 mst_solib_trampoline symbol. When we lookup mst
2413 symbols, we will choose mst_text over
2414 mst_solib_trampoline. */
2415 record_minimal_symbol
2416 (reader
, namestring
, symbol
.n_value
,
2417 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2418 misc_func_recorded
= 1;
2422 /* The symbols often have the same names as
2423 debug symbols for functions, and confuse
2429 /* xlc puts each variable in a separate csect,
2430 so we get an XTY_SD for each variable. But
2431 gcc puts several variables in a csect, so
2432 that each variable only gets an XTY_LD. We
2433 still need to record them. This will
2434 typically be XMC_RW; I suspect XMC_RO and
2435 XMC_BS might be possible too. */
2436 if (*namestring
!= '.')
2437 record_minimal_symbol
2438 (reader
, namestring
, symbol
.n_value
,
2439 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2440 symbol
.n_scnum
, objfile
);
2446 switch (csect_aux
.x_csect
.x_smclas
)
2450 /* Common variables are recorded in the minimal symbol
2451 table, except for section symbols. */
2452 if (*namestring
!= '.')
2453 record_minimal_symbol
2454 (reader
, namestring
, symbol
.n_value
,
2455 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2456 symbol
.n_scnum
, objfile
);
2468 unsigned int symnum_before
;
2470 symnum_before
= ssymnum
;
2471 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2474 /* See if the last csect needs to be recorded. */
2476 if (last_csect_name
&& !misc_func_recorded
)
2478 /* If no misc. function recorded in the last seen csect, enter
2479 it as a function. This will take care of functions like
2480 strcmp() compiled by xlc. */
2482 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2483 mst_text
, last_csect_sec
, objfile
);
2484 misc_func_recorded
= 1;
2489 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2490 includes_used
, symnum_before
,
2491 dependency_list
, dependencies_used
,
2494 dependencies_used
= 0;
2496 first_fun_line_offset
= 0;
2498 /* XCOFF, according to the AIX 3.2 documentation, puts the
2499 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2500 do things the standard COFF way and put it in the auxent.
2501 We use the auxent if the symbol is ".file" and an auxent
2502 exists, otherwise use the symbol itself. */
2503 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2505 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2508 filestring
= namestring
;
2510 pst
= xcoff_start_psymtab (objfile
,
2513 objfile
->global_psymbols
,
2514 objfile
->static_psymbols
);
2515 last_csect_name
= NULL
;
2521 complaint (_("Storage class %d not recognized during scan"),
2527 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2528 to handle only the C_FUN and C_EXT. */
2542 /* C_EINCL means we are switching back to the main file. But there
2543 is no reason to care; the only thing we want to know about
2544 includes is the names of all the included (.h) files. */
2549 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2553 /* I don't think the name of the common block (as opposed to the
2554 variables within it) is something which is user visible
2562 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2563 so C_LSYM would appear to be only for locals. */
2569 /* We probably could save a few instructions by assuming that
2570 C_LSYM, C_PSYM, etc., never have auxents. */
2571 int naux1
= symbol
.n_numaux
+ 1;
2574 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2580 /* Mark down an include file in the current psymtab. */
2581 enum language tmp_language
;
2583 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2586 tmp_language
= deduce_language_from_filename (namestring
);
2588 /* Only change the psymtab's language if we've learned
2589 something useful (eg. tmp_language is not language_unknown).
2590 In addition, to match what start_subfile does, never change
2592 if (tmp_language
!= language_unknown
2593 && (tmp_language
!= language_c
2594 || psymtab_language
!= language_cplus
))
2595 psymtab_language
= tmp_language
;
2597 /* In C++, one may expect the same filename to come round many
2598 times, when code is coming alternately from the main file
2599 and from inline functions in other files. So I check to see
2600 if this is a file we've seen before -- either the main
2601 source file, or a previously included file.
2603 This seems to be a lot of time to be spending on N_SOL, but
2604 things like "break c-exp.y:435" need to work (I
2605 suppose the psymtab_include_list could be hashed or put
2606 in a binary tree, if profiling shows this is a major hog). */
2607 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2613 for (i
= 0; i
< includes_used
; i
++)
2614 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2622 psymtab_include_list
[includes_used
++] = namestring
;
2623 if (includes_used
>= includes_allocated
)
2625 const char **orig
= psymtab_include_list
;
2627 psymtab_include_list
= (const char **)
2628 alloca ((includes_allocated
*= 2) *
2629 sizeof (const char *));
2630 memcpy (psymtab_include_list
, orig
,
2631 includes_used
* sizeof (const char *));
2636 /* The value of the C_FUN is not the address of the function (it
2637 appears to be the address before linking), but as long as it
2638 is smaller than the actual address, then find_pc_partial_function
2639 will use the minimal symbols instead. I hope. */
2648 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2651 p
= strchr (namestring
, ':');
2653 continue; /* Not a debugging symbol. */
2655 /* Main processing section for debugging symbols which
2656 the initial read through the symbol tables needs to worry
2657 about. If we reach this point, the symbol which we are
2658 considering is definitely one we are interested in.
2659 p must also contain the (valid) index into the namestring
2660 which indicates the debugging type symbol. */
2665 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2666 SECT_OFF_DATA (objfile
));
2668 if (gdbarch_static_transform_name_p (gdbarch
))
2669 namestring
= gdbarch_static_transform_name
2670 (gdbarch
, namestring
);
2672 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2673 VAR_DOMAIN
, LOC_STATIC
,
2674 &objfile
->static_psymbols
,
2676 psymtab_language
, objfile
);
2680 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2681 SECT_OFF_DATA (objfile
));
2682 /* The addresses in these entries are reported to be
2683 wrong. See the code that reads 'G's for symtabs. */
2684 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2685 VAR_DOMAIN
, LOC_STATIC
,
2686 &objfile
->global_psymbols
,
2688 psymtab_language
, objfile
);
2692 /* When a 'T' entry is defining an anonymous enum, it
2693 may have a name which is the empty string, or a
2694 single space. Since they're not really defining a
2695 symbol, those shouldn't go in the partial symbol
2696 table. We do pick up the elements of such enums at
2697 'check_enum:', below. */
2698 if (p
>= namestring
+ 2
2699 || (p
== namestring
+ 1
2700 && namestring
[0] != ' '))
2702 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2703 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2704 &objfile
->static_psymbols
,
2705 0, psymtab_language
, objfile
);
2708 /* Also a typedef with the same name. */
2709 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2710 VAR_DOMAIN
, LOC_TYPEDEF
,
2711 &objfile
->static_psymbols
,
2712 0, psymtab_language
, objfile
);
2719 if (p
!= namestring
) /* a name is there, not just :T... */
2721 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2722 VAR_DOMAIN
, LOC_TYPEDEF
,
2723 &objfile
->static_psymbols
,
2724 0, psymtab_language
, objfile
);
2727 /* If this is an enumerated type, we need to
2728 add all the enum constants to the partial symbol
2729 table. This does not cover enums without names, e.g.
2730 "enum {a, b} c;" in C, but fortunately those are
2731 rare. There is no way for GDB to find those from the
2732 enum type without spending too much time on it. Thus
2733 to solve this problem, the compiler needs to put out the
2734 enum in a nameless type. GCC2 does this. */
2736 /* We are looking for something of the form
2737 <name> ":" ("t" | "T") [<number> "="] "e"
2738 {<constant> ":" <value> ","} ";". */
2740 /* Skip over the colon and the 't' or 'T'. */
2742 /* This type may be given a number. Also, numbers can come
2743 in pairs like (0,26). Skip over it. */
2744 while ((*p
>= '0' && *p
<= '9')
2745 || *p
== '(' || *p
== ',' || *p
== ')'
2751 /* The aix4 compiler emits extra crud before the
2755 /* Skip over the type (?). */
2759 /* Skip over the colon. */
2763 /* We have found an enumerated type. */
2764 /* According to comments in read_enum_type
2765 a comma could end it instead of a semicolon.
2766 I don't know where that happens.
2768 while (*p
&& *p
!= ';' && *p
!= ',')
2772 /* Check for and handle cretinous dbx symbol name
2774 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2775 p
= next_symbol_text (objfile
);
2777 /* Point to the character after the name
2778 of the enum constant. */
2779 for (q
= p
; *q
&& *q
!= ':'; q
++)
2781 /* Note that the value doesn't matter for
2782 enum constants in psymtabs, just in symtabs. */
2783 add_psymbol_to_list (p
, q
- p
, 1,
2784 VAR_DOMAIN
, LOC_CONST
,
2785 &objfile
->static_psymbols
,
2786 0, psymtab_language
, objfile
);
2787 /* Point past the name. */
2789 /* Skip over the value. */
2790 while (*p
&& *p
!= ',')
2792 /* Advance past the comma. */
2800 /* Constant, e.g. from "const" in Pascal. */
2801 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2802 VAR_DOMAIN
, LOC_CONST
,
2803 &objfile
->static_psymbols
,
2804 0, psymtab_language
, objfile
);
2810 int name_len
= p
- namestring
;
2811 char *name
= (char *) xmalloc (name_len
+ 1);
2813 memcpy (name
, namestring
, name_len
);
2814 name
[name_len
] = '\0';
2815 function_outside_compilation_unit_complaint (name
);
2818 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2819 SECT_OFF_TEXT (objfile
));
2820 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2821 VAR_DOMAIN
, LOC_BLOCK
,
2822 &objfile
->static_psymbols
,
2824 psymtab_language
, objfile
);
2827 /* Global functions were ignored here, but now they
2828 are put into the global psymtab like one would expect.
2829 They're also in the minimal symbol table. */
2833 int name_len
= p
- namestring
;
2834 char *name
= (char *) xmalloc (name_len
+ 1);
2836 memcpy (name
, namestring
, name_len
);
2837 name
[name_len
] = '\0';
2838 function_outside_compilation_unit_complaint (name
);
2842 /* We need only the minimal symbols for these
2843 loader-generated definitions. Keeping the global
2844 symbols leads to "in psymbols but not in symbols"
2846 if (startswith (namestring
, "@FIX"))
2849 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2850 SECT_OFF_TEXT (objfile
));
2851 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2852 VAR_DOMAIN
, LOC_BLOCK
,
2853 &objfile
->global_psymbols
,
2855 psymtab_language
, objfile
);
2858 /* Two things show up here (hopefully); static symbols of
2859 local scope (static used inside braces) or extensions
2860 of structure symbols. We can ignore both. */
2874 case '#': /* For symbol identification (used in
2879 /* It is a C++ nested symbol. We don't need to record it
2880 (I don't think); if we try to look up foo::bar::baz,
2881 then symbols for the symtab containing foo should get
2882 read in, I think. */
2883 /* Someone says sun cc puts out symbols like
2884 /foo/baz/maclib::/usr/local/bin/maclib,
2885 which would get here with a symbol type of ':'. */
2889 /* Unexpected symbol descriptor. The second and
2890 subsequent stabs of a continued stab can show up
2891 here. The question is whether they ever can mimic
2892 a normal stab--it would be nice if not, since we
2893 certainly don't want to spend the time searching to
2894 the end of every string looking for a
2897 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2899 /* Ignore it; perhaps it is an extension that we don't
2909 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2910 ssymnum
, dependency_list
,
2911 dependencies_used
, textlow_not_set
);
2914 /* Record the toc offset value of this symbol table into objfile
2915 structure. If no XMC_TC0 is found, toc_offset should be zero.
2916 Another place to obtain this information would be file auxiliary
2919 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2922 /* Return the toc offset value for a given objfile. */
2925 xcoff_get_toc_offset (struct objfile
*objfile
)
2928 return XCOFF_DATA (objfile
)->toc_offset
;
2932 /* Scan and build partial symbols for a symbol file.
2933 We have been initialized by a call to dbx_symfile_init, which
2934 put all the relevant info into a "struct dbx_symfile_info",
2935 hung off the objfile structure.
2937 SECTION_OFFSETS contains offsets relative to which the symbols in the
2938 various sections are (depending where the sections were actually
2942 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2946 int num_symbols
; /* # of symbols */
2947 file_ptr symtab_offset
; /* symbol table and */
2948 file_ptr stringtab_offset
; /* string table file offsets */
2949 struct coff_symfile_info
*info
;
2953 info
= XCOFF_DATA (objfile
);
2954 symfile_bfd
= abfd
= objfile
->obfd
;
2955 name
= objfile_name (objfile
);
2957 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2958 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2959 stringtab_offset
= symtab_offset
+
2960 num_symbols
* coff_data (abfd
)->local_symesz
;
2962 info
->min_lineno_offset
= 0;
2963 info
->max_lineno_offset
= 0;
2964 bfd_map_over_sections (abfd
, find_linenos
, info
);
2966 if (num_symbols
> 0)
2968 /* Read the string table. */
2969 init_stringtab (abfd
, stringtab_offset
, objfile
);
2971 /* Read the .debug section, if present and if we're not ignoring
2973 if (!(objfile
->flags
& OBJF_READNEVER
))
2975 struct bfd_section
*secp
;
2976 bfd_size_type length
;
2977 bfd_byte
*debugsec
= NULL
;
2979 secp
= bfd_get_section_by_name (abfd
, ".debug");
2982 length
= bfd_section_size (abfd
, secp
);
2986 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2989 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2991 error (_("Error reading .debug section of `%s': %s"),
2992 name
, bfd_errmsg (bfd_get_error ()));
2996 info
->debugsec
= (char *) debugsec
;
3000 /* Read the symbols. We keep them in core because we will want to
3001 access them randomly in read_symbol*. */
3002 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
3004 error (_("Error reading symbols from %s: %s"),
3005 name
, bfd_errmsg (bfd_get_error ()));
3006 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
3007 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
3008 info
->symtbl_num_syms
= num_symbols
;
3010 val
= bfd_bread (info
->symtbl
, size
, abfd
);
3012 perror_with_name (_("reading symbol table"));
3014 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3015 if (objfile
->global_psymbols
.capacity () == 0
3016 && objfile
->static_psymbols
.capacity () == 0)
3017 /* I'm not sure how how good num_symbols is; the rule of thumb in
3018 init_psymbol_list was developed for a.out. On the one hand,
3019 num_symbols includes auxents. On the other hand, it doesn't
3021 init_psymbol_list (objfile
, num_symbols
);
3023 free_pending_blocks ();
3025 scoped_free_pendings free_pending
;
3026 minimal_symbol_reader
reader (objfile
);
3028 /* Now that the symbol table data of the executable file are all in core,
3029 process them and define symbols accordingly. */
3031 scan_xcoff_symtab (reader
, objfile
);
3033 /* Install any minimal symbols that have been collected as the current
3034 minimal symbols for this objfile. */
3038 /* DWARF2 sections. */
3040 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
3041 dwarf2_build_psymtabs (objfile
);
3043 dwarf2_build_frame_info (objfile
);
3047 xcoff_symfile_offsets (struct objfile
*objfile
,
3048 const section_addr_info
&addrs
)
3050 const char *first_section_name
;
3052 default_symfile_offsets (objfile
, addrs
);
3054 /* Oneof the weird side-effects of default_symfile_offsets is that
3055 it sometimes sets some section indices to zero for sections that,
3056 in fact do not exist. See the body of default_symfile_offsets
3057 for more info on when that happens. Undo that, as this then allows
3058 us to test whether the associated section exists or not, and then
3059 access it quickly (without searching it again). */
3061 if (objfile
->num_sections
== 0)
3062 return; /* Is that even possible? Better safe than sorry. */
3065 = bfd_section_name (objfile
->obfd
, objfile
->sections
[0].the_bfd_section
);
3067 if (objfile
->sect_index_text
== 0
3068 && strcmp (first_section_name
, ".text") != 0)
3069 objfile
->sect_index_text
= -1;
3071 if (objfile
->sect_index_data
== 0
3072 && strcmp (first_section_name
, ".data") != 0)
3073 objfile
->sect_index_data
= -1;
3075 if (objfile
->sect_index_bss
== 0
3076 && strcmp (first_section_name
, ".bss") != 0)
3077 objfile
->sect_index_bss
= -1;
3079 if (objfile
->sect_index_rodata
== 0
3080 && strcmp (first_section_name
, ".rodata") != 0)
3081 objfile
->sect_index_rodata
= -1;
3084 /* Register our ability to parse symbols for xcoff BFD files. */
3086 static const struct sym_fns xcoff_sym_fns
=
3089 /* It is possible that coff and xcoff should be merged as
3090 they do have fundamental similarities (for example, the extra storage
3091 classes used for stabs could presumably be recognized in any COFF file).
3092 However, in addition to obvious things like all the csect hair, there are
3093 some subtler differences between xcoffread.c and coffread.c, notably
3094 the fact that coffread.c has no need to read in all the symbols, but
3095 xcoffread.c reads all the symbols and does in fact randomly access them
3096 (in C_BSTAT and line number processing). */
3098 xcoff_new_init
, /* init anything gbl to entire symtab */
3099 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3100 xcoff_initial_scan
, /* read a symbol file into symtab */
3101 NULL
, /* sym_read_psymbols */
3102 xcoff_symfile_finish
, /* finished with file, cleanup */
3103 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3104 default_symfile_segments
, /* Get segment information from a file. */
3105 aix_process_linenos
,
3106 default_symfile_relocate
, /* Relocate a debug section. */
3107 NULL
, /* sym_probe_fns */
3111 /* Same as xcoff_get_n_import_files, but for core files. */
3114 xcoff_get_core_n_import_files (bfd
*abfd
)
3116 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3118 file_ptr offset
= 0;
3122 return -1; /* Not a core file. */
3124 for (offset
= 0; offset
< bfd_get_section_size (sect
);)
3130 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3132 next
= bfd_get_32 (abfd
, buf
);
3134 break; /* This is the last entry. */
3138 /* Return the number of entries, excluding the first one, which is
3139 the path to the executable that produced this core file. */
3140 return n_entries
- 1;
3143 /* Return the number of import files (shared libraries) that the given
3144 BFD depends on. Return -1 if this number could not be computed. */
3147 xcoff_get_n_import_files (bfd
*abfd
)
3149 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3153 /* If the ".loader" section does not exist, the objfile is probably
3154 not an executable. Might be a core file... */
3156 return xcoff_get_core_n_import_files (abfd
);
3158 /* The number of entries in the Import Files Table is stored in
3159 field l_nimpid. This field is always at offset 16, and is
3160 always 4 bytes long. Read those 4 bytes. */
3162 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3164 l_nimpid
= bfd_get_32 (abfd
, buf
);
3166 /* By convention, the first entry is the default LIBPATH value
3167 to be used by the system loader, so it does not count towards
3168 the number of import files. */
3169 return l_nimpid
- 1;
3172 /* Free the per-objfile xcoff data. */
3175 xcoff_free_info (struct objfile
*objfile
, void *arg
)
3181 _initialize_xcoffread (void)
3183 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);
3185 xcoff_objfile_data_key
= register_objfile_data_with_cleanup (NULL
,