1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2021 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
33 #include "coff/internal.h"
34 #include "libcoff.h" /* FIXME, internal data from BFD */
35 #include "coff/xcoff.h"
37 #include "coff/rs6000.h"
38 #include "xcoffread.h"
42 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "buildsym-legacy.h"
46 #include "stabsread.h"
47 #include "expression.h"
48 #include "complaints.h"
50 #include "dwarf2/sect-names.h"
52 #include "gdb-stabs.h"
54 /* For interface with stabsread.c. */
55 #include "aout/stab_gnu.h"
58 /* We put a pointer to this structure in the read_symtab_private field
64 /* First symbol number for this file. */
68 /* Number of symbols in the section of the symbol table devoted to
69 this file's symbols (actually, the section bracketed may contain
70 more than just this file's symbols). If numsyms is 0, the only
71 reason for this thing's existence is the dependency list. Nothing
72 else will happen when it is read in. */
76 /* Position of the start of the line number information for this
78 unsigned int lineno_off
;
81 /* Remember what we deduced to be the source language of this psymtab. */
83 static enum language psymtab_language
= language_unknown
;
86 /* Simplified internal version of coff symbol table information. */
91 int c_symnum
; /* Symbol number of this entry. */
92 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
94 unsigned char c_sclass
;
99 /* Last function's saved coff symbol `cs'. */
101 static struct coff_symbol fcn_cs_saved
;
103 static bfd
*symfile_bfd
;
105 /* Core address of start and end of text of current source file.
106 This is calculated from the first function seen after a C_FILE
110 static CORE_ADDR cur_src_end_addr
;
112 /* Core address of the end of the first object file. */
114 static CORE_ADDR first_object_file_end
;
116 /* Initial symbol-table-debug-string vector length. */
118 #define INITIAL_STABVECTOR_LENGTH 40
120 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
121 there is any reason not to just use a #define, but might as well
122 ask BFD for the size and store it here, I guess. */
124 static unsigned local_symesz
;
126 struct xcoff_symfile_info
128 file_ptr min_lineno_offset
{}; /* Where in file lowest line#s are. */
129 file_ptr max_lineno_offset
{}; /* 1+last byte of line#s in file. */
131 /* Pointer to the string table. */
132 char *strtbl
= nullptr;
134 /* Pointer to debug section. */
135 char *debugsec
= nullptr;
137 /* Pointer to the a.out symbol table. */
138 char *symtbl
= nullptr;
140 /* Number of symbols in symtbl. */
141 int symtbl_num_syms
= 0;
143 /* Offset in data section to TOC anchor. */
144 CORE_ADDR toc_offset
= 0;
147 /* Key for XCOFF-associated data. */
149 static const struct objfile_key
<xcoff_symfile_info
> xcoff_objfile_data_key
;
151 /* Convenience macro to access the per-objfile XCOFF data. */
153 #define XCOFF_DATA(objfile) \
154 xcoff_objfile_data_key.get (objfile)
156 /* XCOFF names for dwarf sections. There is no compressed sections. */
158 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
160 { ".dwabrev", NULL
},
163 { NULL
, NULL
}, /* debug_loclists */
164 /* AIX XCOFF defines one, named DWARF section for macro debug information.
165 XLC does not generate debug_macinfo for DWARF4 and below.
166 The section is assigned to debug_macro for DWARF5 and above. */
170 { NULL
, NULL
}, /* debug_str_offsets */
171 { NULL
, NULL
}, /* debug_line_str */
172 { ".dwrnges", NULL
},
173 { NULL
, NULL
}, /* debug_rnglists */
174 { ".dwpbtyp", NULL
},
175 { NULL
, NULL
}, /* debug_addr */
176 { ".dwframe", NULL
},
177 { NULL
, NULL
}, /* eh_frame */
178 { NULL
, NULL
}, /* gdb_index */
179 { NULL
, NULL
}, /* debug_names */
180 { NULL
, NULL
}, /* debug_aranges */
185 bf_notfound_complaint (void)
187 complaint (_("line numbers off, `.bf' symbol not found"));
191 ef_complaint (int arg1
)
193 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
197 eb_complaint (int arg1
)
199 complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
202 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
204 static void scan_xcoff_symtab (minimal_symbol_reader
&,
207 static const char *xcoff_next_symbol_text (struct objfile
*);
209 static void record_include_begin (struct coff_symbol
*);
212 enter_line_range (struct subfile
*, unsigned, unsigned,
213 CORE_ADDR
, CORE_ADDR
, unsigned *);
215 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
217 static void xcoff_symfile_init (struct objfile
*);
219 static void xcoff_new_init (struct objfile
*);
221 static void xcoff_symfile_finish (struct objfile
*);
223 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
225 static void read_symbol (struct internal_syment
*, int);
227 static int read_symbol_lineno (int);
229 static CORE_ADDR
read_symbol_nvalue (int);
231 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
234 static void read_xcoff_symtab (struct objfile
*, legacy_psymtab
*);
237 static void add_stab_to_list (char *, struct pending_stabs
**);
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_section_flags (sect
) & SEC_CODE
)
272 *args
->resultp
= SECT_OFF_TEXT (objfile
);
273 else if (bfd_section_flags (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
411 /* Given a line table with function entries are marked, arrange its
412 functions in ascending order and strip off function entry markers
413 and return it in a newly created table. If the old one is good
414 enough, return the old one. */
415 /* FIXME: I think all this stuff can be replaced by just passing
416 sort_linevec = 1 to end_symtab. */
418 static struct linetable
*
419 arrange_linetable (struct linetable
*oldLineTb
)
421 int ii
, jj
, newline
, /* new line count */
422 function_count
; /* # of functions */
424 struct linetable_entry
*fentry
; /* function entry vector */
425 int fentry_size
; /* # of function entries */
426 struct linetable
*newLineTb
; /* new line table */
429 #define NUM_OF_FUNCTIONS 20
431 fentry_size
= NUM_OF_FUNCTIONS
;
432 fentry
= XNEWVEC (struct linetable_entry
, fentry_size
);
434 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
436 if (oldLineTb
->item
[ii
].is_stmt
== 0)
439 if (oldLineTb
->item
[ii
].line
== 0)
440 { /* Function entry found. */
441 if (function_count
>= fentry_size
)
442 { /* Make sure you have room. */
444 fentry
= (struct linetable_entry
*)
446 fentry_size
* sizeof (struct linetable_entry
));
448 fentry
[function_count
].line
= ii
;
449 fentry
[function_count
].is_stmt
= 1;
450 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
453 /* If the function was compiled with XLC, we may have to add an
454 extra line entry later. Reserve space for that. */
455 if (ii
+ 1 < oldLineTb
->nitems
456 && oldLineTb
->item
[ii
].pc
!= oldLineTb
->item
[ii
+ 1].pc
)
461 if (function_count
== 0)
466 else if (function_count
> 1)
467 std::sort (fentry
, fentry
+ function_count
,
468 [] (const linetable_entry
<e1
, const linetable_entry
& lte2
)
469 { return lte1
.pc
< lte2
.pc
; });
471 /* Allocate a new line table. */
472 newLineTb
= (struct linetable
*)
474 (sizeof (struct linetable
) +
475 (oldLineTb
->nitems
- function_count
+ extra_lines
) * sizeof (struct linetable_entry
));
477 /* If line table does not start with a function beginning, copy up until
481 if (oldLineTb
->item
[0].line
!= 0)
483 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
484 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
486 /* Now copy function lines one by one. */
488 for (ii
= 0; ii
< function_count
; ++ii
)
490 /* If the function was compiled with XLC, we may have to add an
491 extra line to cover the function prologue. */
492 jj
= fentry
[ii
].line
;
493 if (jj
+ 1 < oldLineTb
->nitems
494 && oldLineTb
->item
[jj
].pc
!= oldLineTb
->item
[jj
+ 1].pc
)
496 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
497 newLineTb
->item
[newline
].line
= oldLineTb
->item
[jj
+ 1].line
;
501 for (jj
= fentry
[ii
].line
+ 1;
502 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
504 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
507 /* The number of items in the line table must include these
508 extra lines which were added in case of XLC compiled functions. */
509 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
+ extra_lines
;
513 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
514 following `IncludeChain'. At the end of each symtab (end_symtab),
515 we will determine if we should create additional symtab's to
516 represent if (the include files. */
519 typedef struct _inclTable
521 char *name
; /* include filename */
523 /* Offsets to the line table. end points to the last entry which is
524 part of this include file. */
527 struct subfile
*subfile
;
528 unsigned funStartLine
; /* Start line # of its function. */
532 #define INITIAL_INCLUDE_TABLE_LENGTH 20
533 static InclTable
*inclTable
; /* global include table */
534 static int inclIndx
; /* last entry to table */
535 static int inclLength
; /* table length */
536 static int inclDepth
; /* nested include depth */
538 static void allocate_include_entry (void);
541 record_include_begin (struct coff_symbol
*cs
)
545 /* In xcoff, we assume include files cannot be nested (not in .c files
546 of course, but in corresponding .s files.). */
548 /* This can happen with old versions of GCC.
549 GCC 2.3.3-930426 does not exhibit this on a test case which
550 a user said produced the message for him. */
551 complaint (_("Nested C_BINCL symbols"));
555 allocate_include_entry ();
557 inclTable
[inclIndx
].name
= cs
->c_name
;
558 inclTable
[inclIndx
].begin
= cs
->c_value
;
562 record_include_end (struct coff_symbol
*cs
)
568 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
571 allocate_include_entry ();
573 pTbl
= &inclTable
[inclIndx
];
574 pTbl
->end
= cs
->c_value
;
581 allocate_include_entry (void)
583 if (inclTable
== NULL
)
585 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
586 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
589 else if (inclIndx
>= inclLength
)
591 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
592 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
593 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
594 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
598 /* Global variable to pass the psymtab down to all the routines involved
599 in psymtab to symtab processing. */
600 static legacy_psymtab
*this_symtab_psymtab
;
602 /* Objfile related to this_symtab_psymtab; set at the same time. */
603 static struct objfile
*this_symtab_objfile
;
605 /* given the start and end addresses of a compilation unit (or a csect,
606 at times) process its lines and create appropriate line vectors. */
609 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
613 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
615 /* subfile structure for the main compilation unit. */
616 struct subfile main_subfile
;
618 /* In the main source file, any time we see a function entry, we
619 reset this variable to function's absolute starting line number.
620 All the following line numbers in the function are relative to
621 this, and we record absolute line numbers in record_line(). */
623 unsigned int main_source_baseline
= 0;
628 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
630 goto return_after_cleanup
;
632 memset (&main_subfile
, '\0', sizeof (main_subfile
));
635 /* All source lines were in the main source file. None in include
638 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
639 &main_source_baseline
);
643 /* There was source with line numbers in include files. */
646 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
647 main_source_baseline
= 0;
649 for (ii
= 0; ii
< inclIndx
; ++ii
)
651 struct subfile
*tmpSubfile
;
653 /* If there is main file source before include file, enter it. */
654 if (offset
< inclTable
[ii
].begin
)
657 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
658 start
, 0, &main_source_baseline
);
661 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
663 /* The entry in the include table refers to the main source
664 file. Add the lines to the main subfile. */
666 main_source_baseline
= inclTable
[ii
].funStartLine
;
668 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
669 start
, 0, &main_source_baseline
);
670 inclTable
[ii
].subfile
= &main_subfile
;
674 /* Have a new subfile for the include file. */
676 tmpSubfile
= inclTable
[ii
].subfile
= XNEW (struct subfile
);
678 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
679 firstLine
= &(inclTable
[ii
].funStartLine
);
681 /* Enter include file's lines now. */
682 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
683 inclTable
[ii
].end
, start
, 0, firstLine
);
686 if (offset
<= inclTable
[ii
].end
)
687 offset
= inclTable
[ii
].end
+ linesz
;
690 /* All the include files' line have been processed at this point. Now,
691 enter remaining lines of the main file, if any left. */
692 if (offset
< max_offset
+ 1 - linesz
)
694 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
695 &main_source_baseline
);
699 /* Process main file's line numbers. */
700 if (main_subfile
.line_vector
)
702 struct linetable
*lineTb
, *lv
;
704 lv
= main_subfile
.line_vector
;
706 /* Line numbers are not necessarily ordered. xlc compilation will
707 put static function to the end. */
709 struct subfile
*current_subfile
= get_current_subfile ();
710 lineTb
= arrange_linetable (lv
);
713 current_subfile
->line_vector
= (struct linetable
*)
714 xrealloc (lv
, (sizeof (struct linetable
)
715 + lv
->nitems
* sizeof (struct linetable_entry
)));
720 current_subfile
->line_vector
= lineTb
;
723 current_subfile
->line_vector_length
=
724 current_subfile
->line_vector
->nitems
;
727 /* Now, process included files' line numbers. */
729 for (ii
= 0; ii
< inclIndx
; ++ii
)
731 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
732 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
735 struct linetable
*lineTb
, *lv
;
737 lv
= (inclTable
[ii
].subfile
)->line_vector
;
739 /* Line numbers are not necessarily ordered. xlc compilation will
740 put static function to the end. */
742 lineTb
= arrange_linetable (lv
);
746 /* For the same include file, we might want to have more than one
747 subfile. This happens if we have something like:
755 while foo.h including code in it. (stupid but possible)
756 Since start_subfile() looks at the name and uses an
757 existing one if finds, we need to provide a fake name and
761 start_subfile (inclTable
[ii
].name
);
764 /* Pick a fake name that will produce the same results as this
765 one when passed to deduce_language_from_filename. Kludge on
767 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
769 if (fakename
== NULL
)
771 start_subfile (fakename
);
772 xfree (get_current_subfile ()->name
);
774 struct subfile
*current_subfile
= get_current_subfile ();
775 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
780 current_subfile
->line_vector
=
781 (struct linetable
*) xrealloc
782 (lv
, (sizeof (struct linetable
)
783 + lv
->nitems
* sizeof (struct linetable_entry
)));
789 current_subfile
->line_vector
= lineTb
;
792 current_subfile
->line_vector_length
=
793 current_subfile
->line_vector
->nitems
;
794 start_subfile (pop_subfile ());
798 return_after_cleanup
:
800 /* We don't want to keep alloc/free'ing the global include file table. */
805 aix_process_linenos (struct objfile
*objfile
)
807 /* There is no linenos to read if there are only dwarf info. */
808 if (this_symtab_psymtab
== NULL
)
811 /* Process line numbers and enter them into line vector. */
812 process_linenos (get_last_source_start_addr (), cur_src_end_addr
);
816 /* Enter a given range of lines into the line vector.
817 can be called in the following two ways:
818 enter_line_range (subfile, beginoffset, endoffset,
819 startaddr, 0, firstLine) or
820 enter_line_range (subfile, beginoffset, 0,
821 startaddr, endaddr, firstLine)
823 endoffset points to the last line table entry that we should pay
827 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
828 unsigned endoffset
, /* offsets to line table */
829 CORE_ADDR startaddr
, /* offsets to line table */
830 CORE_ADDR endaddr
, unsigned *firstLine
)
832 struct objfile
*objfile
= this_symtab_objfile
;
833 struct gdbarch
*gdbarch
= objfile
->arch ();
834 unsigned int curoffset
;
837 struct internal_lineno int_lnno
;
838 unsigned int limit_offset
;
842 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
844 curoffset
= beginoffset
;
845 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
849 if (endoffset
>= limit_offset
)
851 complaint (_("Bad line table offset in C_EINCL directive"));
854 limit_offset
= endoffset
;
859 abfd
= objfile
->obfd
;
860 linesz
= coff_data (abfd
)->local_linesz
;
861 ext_lnno
= alloca (linesz
);
863 while (curoffset
<= limit_offset
)
865 bfd_seek (abfd
, curoffset
, SEEK_SET
);
866 bfd_bread (ext_lnno
, linesz
, abfd
);
867 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
869 /* Find the address this line represents. */
870 addr
= (int_lnno
.l_lnno
871 ? int_lnno
.l_addr
.l_paddr
872 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
873 addr
+= objfile
->text_section_offset ();
875 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
878 if (int_lnno
.l_lnno
== 0)
880 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
881 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
885 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
886 gdbarch_addr_bits_remove (gdbarch
, addr
));
892 /* Save the vital information for use when closing off the current file.
893 NAME is the file name the symbols came from, START_ADDR is the first
894 text address for the file, and SIZE is the number of bytes of text. */
896 #define complete_symtab(name, start_addr) { \
897 set_last_source_file (name); \
898 set_last_source_start_addr (start_addr); \
902 /* Refill the symbol table input buffer
903 and set the variables that control fetching entries from it.
904 Reports an error if no data available.
905 This function can read past the end of the symbol table
906 (into the string table) but this does no harm. */
908 /* Create a new minimal symbol (using record_with_info).
910 Creation of all new minimal symbols should go through this function
911 rather than calling the various record functions in order
912 to make sure that all symbol addresses get properly relocated.
916 NAME - the symbol's name (but if NAME starts with a period, that
917 leading period is discarded).
918 ADDRESS - the symbol's address, prior to relocation. This function
919 relocates the address before recording the minimal symbol.
920 MS_TYPE - the symbol's type.
921 N_SCNUM - the symbol's XCOFF section number.
922 OBJFILE - the objfile associated with the minimal symbol. */
925 record_minimal_symbol (minimal_symbol_reader
&reader
,
926 const char *name
, CORE_ADDR address
,
927 enum minimal_symbol_type ms_type
,
929 struct objfile
*objfile
)
934 reader
.record_with_info (name
, address
, ms_type
,
935 secnum_to_section (n_scnum
, objfile
));
938 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
939 nested. At any given time, a symbol can only be in one static block.
940 This is the base address of current static block, zero if non exists. */
942 static int static_block_base
= 0;
944 /* Section number for the current static block. */
946 static int static_block_section
= -1;
948 /* true if space for symbol name has been allocated. */
950 static int symname_alloced
= 0;
952 /* Next symbol to read. Pointer into raw seething symbol table. */
954 static char *raw_symbol
;
956 /* This is the function which stabsread.c calls to get symbol
960 xcoff_next_symbol_text (struct objfile
*objfile
)
962 struct internal_syment symbol
;
965 /* FIXME: is this the same as the passed arg? */
966 if (this_symtab_objfile
)
967 objfile
= this_symtab_objfile
;
969 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
972 complaint (_("Unexpected symbol continuation"));
974 /* Return something which points to '\0' and hope the symbol reading
975 code does something reasonable. */
978 else if (symbol
.n_sclass
& 0x80)
980 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
981 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
986 complaint (_("Unexpected symbol continuation"));
988 /* Return something which points to '\0' and hope the symbol reading
989 code does something reasonable. */
995 /* Read symbols for a given partial symbol table. */
998 read_xcoff_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
1000 bfd
*abfd
= objfile
->obfd
;
1001 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
1002 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1003 char *strtbl
= xcoff
->strtbl
;
1004 char *debugsec
= xcoff
->debugsec
;
1005 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
1007 struct internal_syment symbol
[1];
1008 union internal_auxent main_aux
;
1009 struct coff_symbol cs
[1];
1010 CORE_ADDR file_start_addr
= 0;
1011 CORE_ADDR file_end_addr
= 0;
1013 int next_file_symnum
= -1;
1014 unsigned int max_symnum
;
1015 int just_started
= 1;
1017 CORE_ADDR fcn_start_addr
= 0;
1018 enum language pst_symtab_language
;
1020 struct coff_symbol fcn_stab_saved
= { 0 };
1022 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
1023 union internal_auxent fcn_aux_saved
= main_aux
;
1024 struct context_stack
*newobj
;
1026 const char *filestring
= pst
->filename
; /* Name of the current file. */
1028 const char *last_csect_name
; /* Last seen csect's name. */
1030 this_symtab_psymtab
= pst
;
1031 this_symtab_objfile
= objfile
;
1033 /* Get the appropriate COFF "constants" related to the file we're
1035 local_symesz
= coff_data (abfd
)->local_symesz
;
1037 set_last_source_file (NULL
);
1038 last_csect_name
= 0;
1039 pst_symtab_language
= deduce_language_from_filename (filestring
);
1042 start_symtab (objfile
, filestring
, NULL
, file_start_addr
,
1043 pst_symtab_language
);
1044 record_debugformat (debugfmt
);
1045 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
1047 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
1048 first_object_file_end
= 0;
1050 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
1052 while (symnum
< max_symnum
)
1054 QUIT
; /* make this command interruptable. */
1056 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1057 /* read one symbol into `cs' structure. After processing the
1058 whole symbol table, only string table will be kept in memory,
1059 symbol table and debug section of xcoff will be freed. Thus
1060 we can mark symbols with names in string table as
1065 /* Swap and align the symbol into a reasonable C structure. */
1066 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1068 cs
->c_symnum
= symnum
;
1069 cs
->c_naux
= symbol
->n_numaux
;
1070 if (symbol
->n_zeroes
)
1072 symname_alloced
= 0;
1073 /* We must use the original, unswapped, name here so the name field
1074 pointed to by cs->c_name will persist throughout xcoffread. If
1075 we use the new field, it gets overwritten for each symbol. */
1076 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1077 /* If it's exactly E_SYMNMLEN characters long it isn't
1079 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1083 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1085 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1086 p
[E_SYMNMLEN
] = '\0';
1088 symname_alloced
= 1;
1091 else if (symbol
->n_sclass
& 0x80)
1093 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1094 symname_alloced
= 0;
1098 /* in string table */
1099 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1100 symname_alloced
= 1;
1102 cs
->c_value
= symbol
->n_value
;
1103 cs
->c_sclass
= symbol
->n_sclass
;
1104 cs
->c_secnum
= symbol
->n_scnum
;
1105 cs
->c_type
= (unsigned) symbol
->n_type
;
1107 raw_symbol
+= local_symesz
;
1110 /* Save addr of first aux entry. */
1111 raw_auxptr
= raw_symbol
;
1113 /* Skip all the auxents associated with this symbol. */
1114 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1116 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1121 /* if symbol name starts with ".$" or "$", ignore it. */
1122 if (cs
->c_name
[0] == '$'
1123 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1126 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1128 if (get_last_source_file ())
1130 pst
->compunit_symtab
= end_symtab (cur_src_end_addr
,
1131 SECT_OFF_TEXT (objfile
));
1136 start_symtab (objfile
, "_globals_", NULL
,
1137 0, pst_symtab_language
);
1138 record_debugformat (debugfmt
);
1139 cur_src_end_addr
= first_object_file_end
;
1140 /* Done with all files, everything from here on is globals. */
1143 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1144 cs
->c_sclass
== C_WEAKEXT
)
1146 /* Dealing with a symbol with a csect entry. */
1148 #define CSECT(PP) ((PP)->x_csect)
1149 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1150 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1151 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1152 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1154 /* Convert the auxent to something we can access.
1155 XCOFF can have more than one auxiliary entries.
1157 Actual functions will have two auxiliary entries, one to have the
1158 function size and other to have the smtype/smclass (LD/PR).
1160 c_type value of main symbol table will be set only in case of
1161 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1162 Bit 10 of type is set if symbol is a function, ie the value is set
1163 to 32(0x20). So we need to read the first function auxiliary entry
1164 which contains the size. */
1165 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1167 /* a function entry point. */
1169 fcn_start_addr
= cs
->c_value
;
1171 /* save the function header info, which will be used
1172 when `.bf' is seen. */
1175 /* Convert the auxent to something we can access. */
1176 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1177 0, cs
->c_naux
, &fcn_aux_saved
);
1180 /* Read the csect auxiliary header, which is always the last by
1182 bfd_coff_swap_aux_in (abfd
,
1184 + ((coff_data (abfd
)->local_symesz
)
1185 * (cs
->c_naux
- 1)),
1186 cs
->c_type
, cs
->c_sclass
,
1187 cs
->c_naux
- 1, cs
->c_naux
,
1190 switch (CSECT_SMTYP (&main_aux
))
1194 /* Ignore all external references. */
1198 /* A section description. */
1200 switch (CSECT_SCLAS (&main_aux
))
1206 /* A program csect is seen. We have to allocate one
1207 symbol table for each program csect. Normally gdb
1208 prefers one symtab for each source file. In case
1209 of AIX, one source file might include more than one
1210 [PR] csect, and they don't have to be adjacent in
1211 terms of the space they occupy in memory. Thus, one
1212 single source file might get fragmented in the
1213 memory and gdb's file start and end address
1214 approach does not work! GCC (and I think xlc) seem
1215 to put all the code in the unnamed program csect. */
1217 if (last_csect_name
)
1219 complete_symtab (filestring
, file_start_addr
);
1220 cur_src_end_addr
= file_end_addr
;
1221 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1224 /* Give all csects for this source file the same
1226 start_symtab (objfile
, filestring
, NULL
,
1227 0, pst_symtab_language
);
1228 record_debugformat (debugfmt
);
1231 /* If this is the very first csect seen,
1232 basically `__start'. */
1235 first_object_file_end
1236 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1241 cs
->c_value
+ objfile
->text_section_offset ();
1242 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1244 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1245 last_csect_name
= cs
->c_name
;
1249 /* All other symbols are put into the minimal symbol
1262 /* Ignore the symbol. */
1270 switch (CSECT_SCLAS (&main_aux
))
1272 /* We never really come to this part as this case has been
1273 handled in ISFCN check above.
1274 This and other cases of XTY_LD are kept just for
1280 /* shared library function trampoline code entry point. */
1284 /* The symbols often have the same names as debug symbols for
1285 functions, and confuse lookup_symbol. */
1289 /* xlc puts each variable in a separate csect, so we get
1290 an XTY_SD for each variable. But gcc puts several
1291 variables in a csect, so that each variable only gets
1292 an XTY_LD. This will typically be XMC_RW; I suspect
1293 XMC_RO and XMC_BS might be possible too.
1294 These variables are put in the minimal symbol table
1301 /* Common symbols are put into the minimal symbol table only. */
1309 switch (cs
->c_sclass
)
1313 /* c_value field contains symnum of next .file entry in table
1314 or symnum of first global after last .file. */
1316 next_file_symnum
= cs
->c_value
;
1318 /* Complete symbol table for last object file containing
1319 debugging information. */
1321 /* Whether or not there was a csect in the previous file, we
1322 have to call `end_stabs' and `start_stabs' to reset
1323 type_vector, line_vector, etc. structures. */
1325 complete_symtab (filestring
, file_start_addr
);
1326 cur_src_end_addr
= file_end_addr
;
1327 end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1330 /* XCOFF, according to the AIX 3.2 documentation, puts the
1331 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1332 do things the standard COFF way and put it in the auxent.
1333 We use the auxent if the symbol is ".file" and an auxent
1334 exists, otherwise use the symbol itself. Simple
1336 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1338 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1339 0, cs
->c_naux
, &main_aux
);
1340 filestring
= coff_getfilename (&main_aux
, objfile
);
1343 filestring
= cs
->c_name
;
1346 start_symtab (objfile
, filestring
, NULL
, 0, pst_symtab_language
);
1347 record_debugformat (debugfmt
);
1348 last_csect_name
= 0;
1350 /* reset file start and end addresses. A compilation unit
1351 with no text (only data) should have zero file
1353 file_start_addr
= file_end_addr
= 0;
1357 fcn_stab_saved
= *cs
;
1361 if (strcmp (cs
->c_name
, ".bf") == 0)
1363 CORE_ADDR off
= objfile
->text_section_offset ();
1365 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1366 0, cs
->c_naux
, &main_aux
);
1368 within_function
= 1;
1370 newobj
= push_context (0, fcn_start_addr
+ off
);
1372 newobj
->name
= define_symbol
1373 (fcn_cs_saved
.c_value
+ off
,
1374 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1375 if (newobj
->name
!= NULL
)
1376 newobj
->name
->set_section_index (SECT_OFF_TEXT (objfile
));
1378 else if (strcmp (cs
->c_name
, ".ef") == 0)
1380 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1381 0, cs
->c_naux
, &main_aux
);
1383 /* The value of .ef is the address of epilogue code;
1384 not useful for gdb. */
1385 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1386 contains number of lines to '}' */
1388 if (outermost_context_p ())
1389 { /* We attempted to pop an empty context stack. */
1390 ef_complaint (cs
->c_symnum
);
1391 within_function
= 0;
1394 struct context_stack cstk
= pop_context ();
1395 /* Stack must be empty now. */
1396 if (!outermost_context_p ())
1398 ef_complaint (cs
->c_symnum
);
1399 within_function
= 0;
1403 finish_block (cstk
.name
, cstk
.old_blocks
,
1404 NULL
, cstk
.start_addr
,
1405 (fcn_cs_saved
.c_value
1406 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1407 + objfile
->text_section_offset ()));
1408 within_function
= 0;
1413 /* Begin static block. */
1415 struct internal_syment static_symbol
;
1417 read_symbol (&static_symbol
, cs
->c_value
);
1418 static_block_base
= static_symbol
.n_value
;
1419 static_block_section
=
1420 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1425 /* End of static block. */
1426 static_block_base
= 0;
1427 static_block_section
= -1;
1438 complaint (_("Unrecognized storage class %d."),
1453 /* beginning of include file */
1454 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1455 order. Thus, when wee see them, we might not know enough info
1456 to process them. Thus, we'll be saving them into a table
1457 (inclTable) and postpone their processing. */
1459 record_include_begin (cs
);
1463 /* End of include file. */
1464 /* See the comment after case C_BINCL. */
1465 record_include_end (cs
);
1469 if (strcmp (cs
->c_name
, ".bb") == 0)
1472 newobj
= push_context (depth
,
1474 + objfile
->text_section_offset ()));
1476 else if (strcmp (cs
->c_name
, ".eb") == 0)
1478 if (outermost_context_p ())
1479 { /* We attempted to pop an empty context stack. */
1480 eb_complaint (cs
->c_symnum
);
1483 struct context_stack cstk
= pop_context ();
1484 if (depth
-- != cstk
.depth
)
1486 eb_complaint (cs
->c_symnum
);
1489 if (*get_local_symbols () && !outermost_context_p ())
1491 /* Make a block for the local symbols within. */
1492 finish_block (cstk
.name
,
1493 cstk
.old_blocks
, NULL
,
1496 + objfile
->text_section_offset ()));
1498 *get_local_symbols () = cstk
.locals
;
1503 process_xcoff_symbol (cs
, objfile
);
1508 if (get_last_source_file ())
1510 struct compunit_symtab
*cust
;
1512 complete_symtab (filestring
, file_start_addr
);
1513 cur_src_end_addr
= file_end_addr
;
1514 cust
= end_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1515 /* When reading symbols for the last C_FILE of the objfile, try
1516 to make sure that we set pst->compunit_symtab to the symtab for the
1517 file, not to the _globals_ symtab. I'm not sure whether this
1518 actually works right or when/if it comes up. */
1519 if (pst
->compunit_symtab
== NULL
)
1520 pst
->compunit_symtab
= cust
;
1525 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1526 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1530 /* process one xcoff symbol. */
1532 static struct symbol
*
1533 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1535 struct symbol onesymbol
;
1536 struct symbol
*sym
= &onesymbol
;
1537 struct symbol
*sym2
= NULL
;
1543 if (cs
->c_secnum
< 0)
1545 /* The value is a register number, offset within a frame, etc.,
1546 and does not get relocated. */
1552 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1553 off
= objfile
->section_offsets
[sec
];
1560 /* default assumptions */
1561 SET_SYMBOL_VALUE_ADDRESS (sym
, cs
->c_value
+ off
);
1562 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1563 sym
->set_section_index (secnum_to_section (cs
->c_secnum
, objfile
));
1565 if (ISFCN (cs
->c_type
))
1567 /* At this point, we don't know the type of the function. This
1568 will be patched with the type from its stab entry later on in
1569 patch_block_stabs (), unless the file was compiled without -g. */
1571 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1572 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1574 SYMBOL_ACLASS_INDEX (sym
) = LOC_BLOCK
;
1575 sym2
= new (&objfile
->objfile_obstack
) symbol (*sym
);
1577 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1578 add_symbol_to_list (sym2
, get_global_symbols ());
1579 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1580 add_symbol_to_list (sym2
, get_file_symbols ());
1584 /* In case we can't figure out the type, provide default. */
1585 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1587 switch (cs
->c_sclass
)
1590 /* The values of functions and global symbols are now resolved
1591 via the global_sym_chain in stabsread.c. */
1593 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1594 add_stab_to_list (name
, &global_stabs
);
1596 add_stab_to_list (name
, &file_stabs
);
1600 add_stab_to_list (name
, &global_stabs
);
1605 common_block_start (cs
->c_name
, objfile
);
1609 common_block_end (objfile
);
1613 complaint (_("Unexpected storage class: %d"),
1626 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1629 sym
->set_section_index (sec
);
1636 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1637 all statics and we need to distinguish file-scope versus
1638 function-scope using within_function. We do this by
1639 changing the string we pass to define_symbol to use 'S'
1640 where we need to, which is not necessarily super-clean,
1641 but seems workable enough. */
1646 pp
= strchr (name
, ':');
1651 if (*pp
== 'V' && !within_function
)
1653 sym
= define_symbol ((cs
->c_value
1654 + objfile
->section_offsets
[static_block_section
]),
1655 cs
->c_name
, 0, 0, objfile
);
1658 SET_SYMBOL_VALUE_ADDRESS (sym
,
1659 SYMBOL_VALUE_ADDRESS (sym
)
1660 + static_block_base
);
1661 sym
->set_section_index (static_block_section
);
1670 /* Extract the file name from the aux entry of a C_FILE symbol.
1671 Result is in static storage and is only good for temporary use. */
1674 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1676 static char buffer
[BUFSIZ
];
1678 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1679 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1680 + aux_entry
->x_file
.x_n
.x_offset
));
1683 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1684 buffer
[FILNMLEN
] = '\0';
1689 /* Set *SYMBOL to symbol number symno in symtbl. */
1691 read_symbol (struct internal_syment
*symbol
, int symno
)
1693 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1694 int nsyms
= xcoff
->symtbl_num_syms
;
1695 char *stbl
= xcoff
->symtbl
;
1697 if (symno
< 0 || symno
>= nsyms
)
1699 complaint (_("Invalid symbol offset"));
1700 symbol
->n_value
= 0;
1701 symbol
->n_scnum
= -1;
1704 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1705 stbl
+ (symno
* local_symesz
),
1709 /* Get value corresponding to symbol number symno in symtbl. */
1712 read_symbol_nvalue (int symno
)
1714 struct internal_syment symbol
[1];
1716 read_symbol (symbol
, symno
);
1717 return symbol
->n_value
;
1721 /* Find the address of the function corresponding to symno, where
1722 symno is the symbol pointed to by the linetable. */
1725 read_symbol_lineno (int symno
)
1727 struct objfile
*objfile
= this_symtab_objfile
;
1728 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1730 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1731 int nsyms
= info
->symtbl_num_syms
;
1732 char *stbl
= info
->symtbl
;
1733 char *strtbl
= info
->strtbl
;
1735 struct internal_syment symbol
[1];
1736 union internal_auxent main_aux
[1];
1740 bf_notfound_complaint ();
1744 /* Note that just searching for a short distance (e.g. 50 symbols)
1745 is not enough, at least in the following case.
1748 [many .stabx entries]
1749 [a few functions, referring to foo]
1753 What happens here is that the assembler moves the .stabx entries
1754 to right before the ".bf" for foo, but the symbol for "foo" is before
1755 all the stabx entries. See PR gdb/2222. */
1757 /* Maintaining a table of .bf entries might be preferable to this search.
1758 If I understand things correctly it would need to be done only for
1759 the duration of a single psymtab to symtab conversion. */
1760 while (symno
< nsyms
)
1762 bfd_coff_swap_sym_in (symfile_bfd
,
1763 stbl
+ (symno
* local_symesz
), symbol
);
1764 if (symbol
->n_sclass
== C_FCN
)
1766 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1768 if (strcmp (name
, ".bf") == 0)
1771 symno
+= symbol
->n_numaux
+ 1;
1774 bf_notfound_complaint ();
1778 /* Take aux entry and return its lineno. */
1780 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1781 symbol
->n_type
, symbol
->n_sclass
,
1782 0, symbol
->n_numaux
, main_aux
);
1784 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1787 /* Support for line number handling. */
1789 /* This function is called for every section; it finds the outer limits
1790 * of the line table (minimum and maximum file offset) so that the
1791 * mainline code can read the whole thing for efficiency.
1794 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1796 struct xcoff_symfile_info
*info
;
1798 file_ptr offset
, maxoff
;
1800 count
= asect
->lineno_count
;
1802 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1805 size
= count
* coff_data (abfd
)->local_linesz
;
1806 info
= (struct xcoff_symfile_info
*) vpinfo
;
1807 offset
= asect
->line_filepos
;
1808 maxoff
= offset
+ size
;
1810 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1811 info
->min_lineno_offset
= offset
;
1813 if (maxoff
> info
->max_lineno_offset
)
1814 info
->max_lineno_offset
= maxoff
;
1818 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1820 gdb_assert (!pst
->readin
);
1822 /* Read in all partial symtabs on which this one is dependent. */
1823 pst
->expand_dependencies (objfile
);
1825 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1827 /* Init stuff necessary for reading in symbols. */
1830 scoped_free_pendings free_pending
;
1831 read_xcoff_symtab (objfile
, pst
);
1837 /* Read in all of the symbols for a given psymtab for real.
1838 Be verbose about it if the user wants that. SELF is not NULL. */
1841 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1843 gdb_assert (!self
->readin
);
1845 if (((struct symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1846 || self
->number_of_dependencies
)
1848 next_symbol_text_func
= xcoff_next_symbol_text
;
1850 self
->expand_psymtab (objfile
);
1852 /* Match with global symbols. This only needs to be done once,
1853 after all of the symtabs and dependencies have been read in. */
1854 scan_file_globals (objfile
);
1859 xcoff_new_init (struct objfile
*objfile
)
1861 stabsread_new_init ();
1864 /* Do initialization in preparation for reading symbols from OBJFILE.
1866 We will only be called if this is an XCOFF or XCOFF-like file.
1867 BFD handles figuring out the format of the file, and code in symfile.c
1868 uses BFD's determination to vector to us. */
1871 xcoff_symfile_init (struct objfile
*objfile
)
1873 /* Allocate struct to keep track of the symfile. */
1874 xcoff_objfile_data_key
.emplace (objfile
);
1876 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1877 find this causes a significant slowdown in gdb then we could
1878 set it in the debug symbol readers only when necessary. */
1879 objfile
->flags
|= OBJF_REORDERED
;
1882 /* Perform any local cleanups required when we are done with a particular
1883 objfile. I.E, we are in the process of discarding all symbol information
1884 for an objfile, freeing up all memory held for it, and unlinking the
1885 objfile struct from the global list of known objfiles. */
1888 xcoff_symfile_finish (struct objfile
*objfile
)
1890 /* Start with a fresh include table for the next objfile. */
1896 inclIndx
= inclLength
= inclDepth
= 0;
1901 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1905 unsigned char lengthbuf
[4];
1907 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1909 xcoff
->strtbl
= NULL
;
1911 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1912 error (_("cannot seek to string table in %s: %s"),
1913 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1915 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1916 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1918 /* If no string table is needed, then the file may end immediately
1919 after the symbols. Just return with `strtbl' set to NULL. */
1921 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1924 /* Allocate string table from objfile_obstack. We will need this table
1925 as long as we have its symbol table around. */
1927 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1928 xcoff
->strtbl
= strtbl
;
1930 /* Copy length buffer, the first byte is usually zero and is
1931 used for stabs with a name length of zero. */
1932 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1933 if (length
== sizeof lengthbuf
)
1936 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1938 if (val
!= length
- sizeof lengthbuf
)
1939 error (_("cannot read string table from %s: %s"),
1940 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1941 if (strtbl
[length
- 1] != '\0')
1942 error (_("bad symbol file: string table "
1943 "does not end with null character"));
1948 /* If we have not yet seen a function for this psymtab, this is 0. If we
1949 have seen one, it is the offset in the line numbers of the line numbers
1951 static unsigned int first_fun_line_offset
;
1953 /* Allocate and partially fill a partial symtab. It will be
1954 completely filled at the end of the symbol list.
1956 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1957 is the address relative to which its symbols are (incremental) or 0
1960 static legacy_psymtab
*
1961 xcoff_start_psymtab (struct objfile
*objfile
,
1962 const char *filename
, int first_symnum
)
1964 /* We fill in textlow later. */
1965 legacy_psymtab
*result
= new legacy_psymtab (filename
, objfile
, 0);
1967 result
->read_symtab_private
=
1968 XOBNEW (&objfile
->objfile_obstack
, struct symloc
);
1969 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1970 result
->legacy_read_symtab
= xcoff_read_symtab
;
1971 result
->legacy_expand_psymtab
= xcoff_expand_psymtab
;
1973 /* Deduce the source language from the filename for this psymtab. */
1974 psymtab_language
= deduce_language_from_filename (filename
);
1979 /* Close off the current usage of PST.
1980 Returns PST, or NULL if the partial symtab was empty and thrown away.
1982 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1984 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1985 are the information for includes and dependencies. */
1987 static legacy_psymtab
*
1988 xcoff_end_psymtab (struct objfile
*objfile
, legacy_psymtab
*pst
,
1989 const char **include_list
, int num_includes
,
1990 int capping_symbol_number
,
1991 legacy_psymtab
**dependency_list
,
1992 int number_dependencies
, int textlow_not_set
)
1996 if (capping_symbol_number
!= -1)
1997 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
1998 capping_symbol_number
1999 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2000 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2001 first_fun_line_offset
;
2002 first_fun_line_offset
= 0;
2006 pst
->number_of_dependencies
= number_dependencies
;
2007 if (number_dependencies
)
2010 = objfile
->partial_symtabs
->allocate_dependencies (number_dependencies
);
2011 memcpy (pst
->dependencies
, dependency_list
,
2012 number_dependencies
* sizeof (legacy_psymtab
*));
2015 pst
->dependencies
= 0;
2017 for (i
= 0; i
< num_includes
; i
++)
2019 legacy_psymtab
*subpst
=
2020 new legacy_psymtab (include_list
[i
], objfile
);
2022 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, symloc
);
2023 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2024 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2026 /* We could save slight bits of space by only making one of these,
2027 shared by the entire set of include files. FIXME-someday. */
2028 subpst
->dependencies
=
2029 objfile
->partial_symtabs
->allocate_dependencies (1);
2030 subpst
->dependencies
[0] = pst
;
2031 subpst
->number_of_dependencies
= 1;
2033 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
2034 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
2037 if (num_includes
== 0
2038 && number_dependencies
== 0
2041 /* Throw away this psymtab, it's empty. */
2042 /* Empty psymtabs happen as a result of header files which don't have
2043 any symbols in them. There can be a lot of them. */
2045 objfile
->partial_symtabs
->discard_psymtab (pst
);
2047 /* Indicate that psymtab was thrown away. */
2053 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2054 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2055 the symbol and its auxents. */
2058 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2059 const char **name
, char **raw
, unsigned int *symnump
,
2060 struct objfile
*objfile
)
2062 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2063 if (symbol
->n_zeroes
)
2065 /* If it's exactly E_SYMNMLEN characters long it isn't
2067 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2069 /* FIXME: wastes memory for symbols which we don't end up putting
2070 into the minimal symbols. */
2073 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2075 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2076 p
[E_SYMNMLEN
] = '\0';
2080 /* Point to the unswapped name as that persists as long as the
2082 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2084 else if (symbol
->n_sclass
& 0x80)
2086 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2090 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2093 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2094 if (symbol
->n_numaux
> 0)
2096 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2097 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2099 *symnump
+= symbol
->n_numaux
;
2100 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2105 function_outside_compilation_unit_complaint (const char *arg1
)
2107 complaint (_("function `%s' appears to be defined "
2108 "outside of all compilation units"),
2113 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2114 struct objfile
*objfile
)
2116 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2117 const char *filestring
= NULL
;
2119 const char *namestring
;
2124 /* Current partial symtab */
2125 legacy_psymtab
*pst
;
2127 /* List of current psymtab's include files. */
2128 const char **psymtab_include_list
;
2129 int includes_allocated
;
2132 /* Index within current psymtab dependency list. */
2133 legacy_psymtab
**dependency_list
;
2134 int dependencies_used
, dependencies_allocated
;
2137 struct internal_syment symbol
;
2138 union internal_auxent main_aux
[5];
2139 unsigned int ssymnum
;
2141 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2142 CORE_ADDR last_csect_val
= 0;
2143 int last_csect_sec
= 0;
2144 int misc_func_recorded
= 0; /* true if any misc. function. */
2145 int textlow_not_set
= 1;
2147 pst
= (legacy_psymtab
*) 0;
2149 includes_allocated
= 30;
2151 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2152 sizeof (const char *));
2154 dependencies_allocated
= 30;
2155 dependencies_used
= 0;
2157 (legacy_psymtab
**) alloca (dependencies_allocated
*
2158 sizeof (legacy_psymtab
*));
2160 set_last_source_file (NULL
);
2162 abfd
= objfile
->obfd
;
2163 next_symbol_text_func
= xcoff_next_symbol_text
;
2165 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2166 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2168 while (ssymnum
< nsyms
)
2174 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2175 sclass
= symbol
.n_sclass
;
2183 /* The CSECT auxent--always the last auxent. */
2184 union internal_auxent csect_aux
;
2185 unsigned int symnum_before
= ssymnum
;
2187 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2189 if (symbol
.n_numaux
> 1)
2191 bfd_coff_swap_aux_in
2193 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2196 symbol
.n_numaux
- 1,
2201 csect_aux
= main_aux
[0];
2203 /* If symbol name starts with ".$" or "$", ignore it. */
2204 if (namestring
[0] == '$'
2205 || (namestring
[0] == '.' && namestring
[1] == '$'))
2208 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2211 switch (csect_aux
.x_csect
.x_smclas
)
2214 if (last_csect_name
)
2216 /* If no misc. function recorded in the last
2217 seen csect, enter it as a function. This
2218 will take care of functions like strcmp()
2221 if (!misc_func_recorded
)
2223 record_minimal_symbol
2224 (reader
, last_csect_name
, last_csect_val
,
2225 mst_text
, last_csect_sec
, objfile
);
2226 misc_func_recorded
= 1;
2231 /* We have to allocate one psymtab for
2232 each program csect, because their text
2233 sections need not be adjacent. */
2235 (objfile
, pst
, psymtab_include_list
,
2236 includes_used
, symnum_before
, dependency_list
,
2237 dependencies_used
, textlow_not_set
);
2239 dependencies_used
= 0;
2240 /* Give all psymtabs for this source file the same
2242 pst
= xcoff_start_psymtab
2248 /* Activate the misc_func_recorded mechanism for
2249 compiler- and linker-generated CSECTs like ".strcmp"
2251 if (namestring
&& (namestring
[0] == '.'
2252 || namestring
[0] == '@'))
2254 last_csect_name
= namestring
;
2255 last_csect_val
= symbol
.n_value
;
2256 last_csect_sec
= symbol
.n_scnum
;
2261 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2263 if (highval
> pst
->raw_text_high ())
2264 pst
->set_text_high (highval
);
2265 if (!pst
->text_low_valid
2266 || symbol
.n_value
< pst
->raw_text_low ())
2267 pst
->set_text_low (symbol
.n_value
);
2269 misc_func_recorded
= 0;
2274 /* Data variables are recorded in the minimal symbol
2275 table, except for section symbols. */
2276 if (*namestring
!= '.')
2277 record_minimal_symbol
2278 (reader
, namestring
, symbol
.n_value
,
2279 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2280 symbol
.n_scnum
, objfile
);
2285 warning (_("More than one XMC_TC0 symbol found."));
2286 toc_offset
= symbol
.n_value
;
2288 /* Make TOC offset relative to start address of
2290 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2292 toc_offset
-= bfd_section_vma (bfd_sect
);
2296 /* These symbols tell us where the TOC entry for a
2297 variable is, not the variable itself. */
2306 switch (csect_aux
.x_csect
.x_smclas
)
2309 /* A function entry point. */
2311 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2312 first_fun_line_offset
=
2313 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2315 record_minimal_symbol
2316 (reader
, namestring
, symbol
.n_value
,
2317 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2318 symbol
.n_scnum
, objfile
);
2319 misc_func_recorded
= 1;
2323 /* shared library function trampoline code entry
2326 /* record trampoline code entries as
2327 mst_solib_trampoline symbol. When we lookup mst
2328 symbols, we will choose mst_text over
2329 mst_solib_trampoline. */
2330 record_minimal_symbol
2331 (reader
, namestring
, symbol
.n_value
,
2332 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2333 misc_func_recorded
= 1;
2337 /* The symbols often have the same names as
2338 debug symbols for functions, and confuse
2344 /* xlc puts each variable in a separate csect,
2345 so we get an XTY_SD for each variable. But
2346 gcc puts several variables in a csect, so
2347 that each variable only gets an XTY_LD. We
2348 still need to record them. This will
2349 typically be XMC_RW; I suspect XMC_RO and
2350 XMC_BS might be possible too. */
2351 if (*namestring
!= '.')
2352 record_minimal_symbol
2353 (reader
, namestring
, symbol
.n_value
,
2354 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2355 symbol
.n_scnum
, objfile
);
2361 switch (csect_aux
.x_csect
.x_smclas
)
2365 /* Common variables are recorded in the minimal symbol
2366 table, except for section symbols. */
2367 if (*namestring
!= '.')
2368 record_minimal_symbol
2369 (reader
, namestring
, symbol
.n_value
,
2370 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2371 symbol
.n_scnum
, objfile
);
2383 unsigned int symnum_before
;
2385 symnum_before
= ssymnum
;
2386 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2389 /* See if the last csect needs to be recorded. */
2391 if (last_csect_name
&& !misc_func_recorded
)
2393 /* If no misc. function recorded in the last seen csect, enter
2394 it as a function. This will take care of functions like
2395 strcmp() compiled by xlc. */
2397 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2398 mst_text
, last_csect_sec
, objfile
);
2399 misc_func_recorded
= 1;
2404 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
,
2405 includes_used
, symnum_before
,
2406 dependency_list
, dependencies_used
,
2409 dependencies_used
= 0;
2411 first_fun_line_offset
= 0;
2413 /* XCOFF, according to the AIX 3.2 documentation, puts the
2414 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2415 do things the standard COFF way and put it in the auxent.
2416 We use the auxent if the symbol is ".file" and an auxent
2417 exists, otherwise use the symbol itself. */
2418 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2420 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2423 filestring
= namestring
;
2425 pst
= xcoff_start_psymtab (objfile
,
2428 last_csect_name
= NULL
;
2434 complaint (_("Storage class %d not recognized during scan"),
2440 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2441 to handle only the C_FUN and C_EXT. */
2455 /* C_EINCL means we are switching back to the main file. But there
2456 is no reason to care; the only thing we want to know about
2457 includes is the names of all the included (.h) files. */
2462 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2466 /* I don't think the name of the common block (as opposed to the
2467 variables within it) is something which is user visible
2475 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2476 so C_LSYM would appear to be only for locals. */
2482 /* We probably could save a few instructions by assuming that
2483 C_LSYM, C_PSYM, etc., never have auxents. */
2484 int naux1
= symbol
.n_numaux
+ 1;
2487 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2493 /* Mark down an include file in the current psymtab. */
2494 enum language tmp_language
;
2496 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2499 tmp_language
= deduce_language_from_filename (namestring
);
2501 /* Only change the psymtab's language if we've learned
2502 something useful (eg. tmp_language is not language_unknown).
2503 In addition, to match what start_subfile does, never change
2505 if (tmp_language
!= language_unknown
2506 && (tmp_language
!= language_c
2507 || psymtab_language
!= language_cplus
))
2508 psymtab_language
= tmp_language
;
2510 /* In C++, one may expect the same filename to come round many
2511 times, when code is coming alternately from the main file
2512 and from inline functions in other files. So I check to see
2513 if this is a file we've seen before -- either the main
2514 source file, or a previously included file.
2516 This seems to be a lot of time to be spending on N_SOL, but
2517 things like "break c-exp.y:435" need to work (I
2518 suppose the psymtab_include_list could be hashed or put
2519 in a binary tree, if profiling shows this is a major hog). */
2520 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2526 for (i
= 0; i
< includes_used
; i
++)
2527 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2535 psymtab_include_list
[includes_used
++] = namestring
;
2536 if (includes_used
>= includes_allocated
)
2538 const char **orig
= psymtab_include_list
;
2540 psymtab_include_list
= (const char **)
2541 alloca ((includes_allocated
*= 2) *
2542 sizeof (const char *));
2543 memcpy (psymtab_include_list
, orig
,
2544 includes_used
* sizeof (const char *));
2549 /* The value of the C_FUN is not the address of the function (it
2550 appears to be the address before linking), but as long as it
2551 is smaller than the actual address, then find_pc_partial_function
2552 will use the minimal symbols instead. I hope. */
2561 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2564 p
= strchr (namestring
, ':');
2566 continue; /* Not a debugging symbol. */
2568 /* Main processing section for debugging symbols which
2569 the initial read through the symbol tables needs to worry
2570 about. If we reach this point, the symbol which we are
2571 considering is definitely one we are interested in.
2572 p must also contain the (valid) index into the namestring
2573 which indicates the debugging type symbol. */
2578 pst
->add_psymbol (gdb::string_view (namestring
,
2580 true, VAR_DOMAIN
, LOC_STATIC
,
2581 SECT_OFF_DATA (objfile
),
2582 psymbol_placement::STATIC
,
2584 psymtab_language
, objfile
);
2588 /* The addresses in these entries are reported to be
2589 wrong. See the code that reads 'G's for symtabs. */
2590 pst
->add_psymbol (gdb::string_view (namestring
,
2592 true, VAR_DOMAIN
, LOC_STATIC
,
2593 SECT_OFF_DATA (objfile
),
2594 psymbol_placement::GLOBAL
,
2596 psymtab_language
, objfile
);
2600 /* When a 'T' entry is defining an anonymous enum, it
2601 may have a name which is the empty string, or a
2602 single space. Since they're not really defining a
2603 symbol, those shouldn't go in the partial symbol
2604 table. We do pick up the elements of such enums at
2605 'check_enum:', below. */
2606 if (p
>= namestring
+ 2
2607 || (p
== namestring
+ 1
2608 && namestring
[0] != ' '))
2610 pst
->add_psymbol (gdb::string_view (namestring
,
2612 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2613 psymbol_placement::STATIC
,
2614 0, psymtab_language
, objfile
);
2617 /* Also a typedef with the same name. */
2618 pst
->add_psymbol (gdb::string_view (namestring
,
2620 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2621 psymbol_placement::STATIC
,
2622 0, psymtab_language
, objfile
);
2629 if (p
!= namestring
) /* a name is there, not just :T... */
2631 pst
->add_psymbol (gdb::string_view (namestring
,
2633 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2634 psymbol_placement::STATIC
,
2635 0, psymtab_language
, objfile
);
2638 /* If this is an enumerated type, we need to
2639 add all the enum constants to the partial symbol
2640 table. This does not cover enums without names, e.g.
2641 "enum {a, b} c;" in C, but fortunately those are
2642 rare. There is no way for GDB to find those from the
2643 enum type without spending too much time on it. Thus
2644 to solve this problem, the compiler needs to put out the
2645 enum in a nameless type. GCC2 does this. */
2647 /* We are looking for something of the form
2648 <name> ":" ("t" | "T") [<number> "="] "e"
2649 {<constant> ":" <value> ","} ";". */
2651 /* Skip over the colon and the 't' or 'T'. */
2653 /* This type may be given a number. Also, numbers can come
2654 in pairs like (0,26). Skip over it. */
2655 while ((*p
>= '0' && *p
<= '9')
2656 || *p
== '(' || *p
== ',' || *p
== ')'
2662 /* The aix4 compiler emits extra crud before the
2666 /* Skip over the type (?). */
2670 /* Skip over the colon. */
2674 /* We have found an enumerated type. */
2675 /* According to comments in read_enum_type
2676 a comma could end it instead of a semicolon.
2677 I don't know where that happens.
2679 while (*p
&& *p
!= ';' && *p
!= ',')
2683 /* Check for and handle cretinous dbx symbol name
2685 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2686 p
= next_symbol_text (objfile
);
2688 /* Point to the character after the name
2689 of the enum constant. */
2690 for (q
= p
; *q
&& *q
!= ':'; q
++)
2692 /* Note that the value doesn't matter for
2693 enum constants in psymtabs, just in symtabs. */
2694 pst
->add_psymbol (gdb::string_view (p
, q
- p
), true,
2695 VAR_DOMAIN
, LOC_CONST
, -1,
2696 psymbol_placement::STATIC
,
2697 0, psymtab_language
, objfile
);
2698 /* Point past the name. */
2700 /* Skip over the value. */
2701 while (*p
&& *p
!= ',')
2703 /* Advance past the comma. */
2711 /* Constant, e.g. from "const" in Pascal. */
2712 pst
->add_psymbol (gdb::string_view (namestring
,
2714 true, VAR_DOMAIN
, LOC_CONST
, -1,
2715 psymbol_placement::STATIC
,
2716 0, psymtab_language
, objfile
);
2722 int name_len
= p
- namestring
;
2723 char *name
= (char *) xmalloc (name_len
+ 1);
2725 memcpy (name
, namestring
, name_len
);
2726 name
[name_len
] = '\0';
2727 function_outside_compilation_unit_complaint (name
);
2730 pst
->add_psymbol (gdb::string_view (namestring
,
2732 true, VAR_DOMAIN
, LOC_BLOCK
,
2733 SECT_OFF_TEXT (objfile
),
2734 psymbol_placement::STATIC
,
2736 psymtab_language
, objfile
);
2739 /* Global functions were ignored here, but now they
2740 are put into the global psymtab like one would expect.
2741 They're also in the minimal symbol table. */
2745 int name_len
= p
- namestring
;
2746 char *name
= (char *) xmalloc (name_len
+ 1);
2748 memcpy (name
, namestring
, name_len
);
2749 name
[name_len
] = '\0';
2750 function_outside_compilation_unit_complaint (name
);
2754 /* We need only the minimal symbols for these
2755 loader-generated definitions. Keeping the global
2756 symbols leads to "in psymbols but not in symbols"
2758 if (startswith (namestring
, "@FIX"))
2761 pst
->add_psymbol (gdb::string_view (namestring
,
2763 true, VAR_DOMAIN
, LOC_BLOCK
,
2764 SECT_OFF_TEXT (objfile
),
2765 psymbol_placement::GLOBAL
,
2767 psymtab_language
, objfile
);
2770 /* Two things show up here (hopefully); static symbols of
2771 local scope (static used inside braces) or extensions
2772 of structure symbols. We can ignore both. */
2786 case '#': /* For symbol identification (used in
2791 /* It is a C++ nested symbol. We don't need to record it
2792 (I don't think); if we try to look up foo::bar::baz,
2793 then symbols for the symtab containing foo should get
2794 read in, I think. */
2795 /* Someone says sun cc puts out symbols like
2796 /foo/baz/maclib::/usr/local/bin/maclib,
2797 which would get here with a symbol type of ':'. */
2801 /* Unexpected symbol descriptor. The second and
2802 subsequent stabs of a continued stab can show up
2803 here. The question is whether they ever can mimic
2804 a normal stab--it would be nice if not, since we
2805 certainly don't want to spend the time searching to
2806 the end of every string looking for a
2809 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2811 /* Ignore it; perhaps it is an extension that we don't
2821 xcoff_end_psymtab (objfile
, pst
, psymtab_include_list
, includes_used
,
2822 ssymnum
, dependency_list
,
2823 dependencies_used
, textlow_not_set
);
2826 /* Record the toc offset value of this symbol table into objfile
2827 structure. If no XMC_TC0 is found, toc_offset should be zero.
2828 Another place to obtain this information would be file auxiliary
2831 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2834 /* Return the toc offset value for a given objfile. */
2837 xcoff_get_toc_offset (struct objfile
*objfile
)
2840 return XCOFF_DATA (objfile
)->toc_offset
;
2844 /* Scan and build partial symbols for a symbol file.
2845 We have been initialized by a call to dbx_symfile_init, which
2846 put all the relevant info into a "struct dbx_symfile_info",
2847 hung off the objfile structure.
2849 SECTION_OFFSETS contains offsets relative to which the symbols in the
2850 various sections are (depending where the sections were actually
2854 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2858 int num_symbols
; /* # of symbols */
2859 file_ptr symtab_offset
; /* symbol table and */
2860 file_ptr stringtab_offset
; /* string table file offsets */
2861 struct xcoff_symfile_info
*info
;
2865 info
= XCOFF_DATA (objfile
);
2866 symfile_bfd
= abfd
= objfile
->obfd
;
2867 name
= objfile_name (objfile
);
2869 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2870 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2871 stringtab_offset
= symtab_offset
+
2872 num_symbols
* coff_data (abfd
)->local_symesz
;
2874 info
->min_lineno_offset
= 0;
2875 info
->max_lineno_offset
= 0;
2876 bfd_map_over_sections (abfd
, find_linenos
, info
);
2878 if (num_symbols
> 0)
2880 /* Read the string table. */
2881 init_stringtab (abfd
, stringtab_offset
, objfile
);
2883 /* Read the .debug section, if present and if we're not ignoring
2885 if (!(objfile
->flags
& OBJF_READNEVER
))
2887 struct bfd_section
*secp
;
2888 bfd_size_type length
;
2889 bfd_byte
*debugsec
= NULL
;
2891 secp
= bfd_get_section_by_name (abfd
, ".debug");
2894 length
= bfd_section_size (secp
);
2898 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2901 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2903 error (_("Error reading .debug section of `%s': %s"),
2904 name
, bfd_errmsg (bfd_get_error ()));
2908 info
->debugsec
= (char *) debugsec
;
2912 /* Read the symbols. We keep them in core because we will want to
2913 access them randomly in read_symbol*. */
2914 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2916 error (_("Error reading symbols from %s: %s"),
2917 name
, bfd_errmsg (bfd_get_error ()));
2918 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2919 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2920 info
->symtbl_num_syms
= num_symbols
;
2922 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2924 perror_with_name (_("reading symbol table"));
2926 scoped_free_pendings free_pending
;
2927 minimal_symbol_reader
reader (objfile
);
2929 /* Now that the symbol table data of the executable file are all in core,
2930 process them and define symbols accordingly. */
2932 scan_xcoff_symtab (reader
, objfile
);
2934 /* Install any minimal symbols that have been collected as the current
2935 minimal symbols for this objfile. */
2939 /* DWARF2 sections. */
2941 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2942 dwarf2_build_psymtabs (objfile
);
2944 dwarf2_build_frame_info (objfile
);
2948 xcoff_symfile_offsets (struct objfile
*objfile
,
2949 const section_addr_info
&addrs
)
2951 const char *first_section_name
;
2953 default_symfile_offsets (objfile
, addrs
);
2955 /* Oneof the weird side-effects of default_symfile_offsets is that
2956 it sometimes sets some section indices to zero for sections that,
2957 in fact do not exist. See the body of default_symfile_offsets
2958 for more info on when that happens. Undo that, as this then allows
2959 us to test whether the associated section exists or not, and then
2960 access it quickly (without searching it again). */
2962 if (objfile
->section_offsets
.empty ())
2963 return; /* Is that even possible? Better safe than sorry. */
2965 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2967 if (objfile
->sect_index_text
== 0
2968 && strcmp (first_section_name
, ".text") != 0)
2969 objfile
->sect_index_text
= -1;
2971 if (objfile
->sect_index_data
== 0
2972 && strcmp (first_section_name
, ".data") != 0)
2973 objfile
->sect_index_data
= -1;
2975 if (objfile
->sect_index_bss
== 0
2976 && strcmp (first_section_name
, ".bss") != 0)
2977 objfile
->sect_index_bss
= -1;
2979 if (objfile
->sect_index_rodata
== 0
2980 && strcmp (first_section_name
, ".rodata") != 0)
2981 objfile
->sect_index_rodata
= -1;
2984 /* Register our ability to parse symbols for xcoff BFD files. */
2986 static const struct sym_fns xcoff_sym_fns
=
2989 /* It is possible that coff and xcoff should be merged as
2990 they do have fundamental similarities (for example, the extra storage
2991 classes used for stabs could presumably be recognized in any COFF file).
2992 However, in addition to obvious things like all the csect hair, there are
2993 some subtler differences between xcoffread.c and coffread.c, notably
2994 the fact that coffread.c has no need to read in all the symbols, but
2995 xcoffread.c reads all the symbols and does in fact randomly access them
2996 (in C_BSTAT and line number processing). */
2998 xcoff_new_init
, /* init anything gbl to entire symtab */
2999 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3000 xcoff_initial_scan
, /* read a symbol file into symtab */
3001 NULL
, /* sym_read_psymbols */
3002 xcoff_symfile_finish
, /* finished with file, cleanup */
3003 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3004 default_symfile_segments
, /* Get segment information from a file. */
3005 aix_process_linenos
,
3006 default_symfile_relocate
, /* Relocate a debug section. */
3007 NULL
, /* sym_probe_fns */
3011 /* Same as xcoff_get_n_import_files, but for core files. */
3014 xcoff_get_core_n_import_files (bfd
*abfd
)
3016 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
3018 file_ptr offset
= 0;
3022 return -1; /* Not a core file. */
3024 for (offset
= 0; offset
< bfd_section_size (sect
);)
3030 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
3032 next
= bfd_get_32 (abfd
, buf
);
3034 break; /* This is the last entry. */
3038 /* Return the number of entries, excluding the first one, which is
3039 the path to the executable that produced this core file. */
3040 return n_entries
- 1;
3043 /* Return the number of import files (shared libraries) that the given
3044 BFD depends on. Return -1 if this number could not be computed. */
3047 xcoff_get_n_import_files (bfd
*abfd
)
3049 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
3053 /* If the ".loader" section does not exist, the objfile is probably
3054 not an executable. Might be a core file... */
3056 return xcoff_get_core_n_import_files (abfd
);
3058 /* The number of entries in the Import Files Table is stored in
3059 field l_nimpid. This field is always at offset 16, and is
3060 always 4 bytes long. Read those 4 bytes. */
3062 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
3064 l_nimpid
= bfd_get_32 (abfd
, buf
);
3066 /* By convention, the first entry is the default LIBPATH value
3067 to be used by the system loader, so it does not count towards
3068 the number of import files. */
3069 return l_nimpid
- 1;
3072 void _initialize_xcoffread ();
3074 _initialize_xcoffread ()
3076 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);