1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2022 Free Software Foundation, Inc.
3 Derived from coffread.c, dbxread.c, and a lot of hacking.
4 Contributed by IBM Corporation.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include <sys/types.h>
27 #ifdef HAVE_SYS_FILE_H
33 #include "coff/internal.h"
34 #include "libcoff.h" /* FIXME, internal data from BFD */
35 #include "coff/xcoff.h"
37 #include "coff/rs6000.h"
38 #include "xcoffread.h"
42 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
45 #include "buildsym-legacy.h"
46 #include "stabsread.h"
47 #include "expression.h"
48 #include "complaints.h"
50 #include "dwarf2/sect-names.h"
51 #include "dwarf2/public.h"
53 #include "gdb-stabs.h"
55 /* For interface with stabsread.c. */
56 #include "aout/stab_gnu.h"
59 /* We put a pointer to this structure in the read_symtab_private field
65 /* First symbol number for this file. */
69 /* Number of symbols in the section of the symbol table devoted to
70 this file's symbols (actually, the section bracketed may contain
71 more than just this file's symbols). If numsyms is 0, the only
72 reason for this thing's existence is the dependency list. Nothing
73 else will happen when it is read in. */
77 /* Position of the start of the line number information for this
79 unsigned int lineno_off
;
82 /* Remember what we deduced to be the source language of this psymtab. */
84 static enum language psymtab_language
= language_unknown
;
87 /* Simplified internal version of coff symbol table information. */
92 int c_symnum
; /* Symbol number of this entry. */
93 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
95 unsigned char c_sclass
;
100 /* Last function's saved coff symbol `cs'. */
102 static struct xcoff_symbol fcn_cs_saved
;
104 static bfd
*symfile_bfd
;
106 /* Core address of start and end of text of current source file.
107 This is calculated from the first function seen after a C_FILE
111 static CORE_ADDR cur_src_end_addr
;
113 /* Core address of the end of the first object file. */
115 static CORE_ADDR first_object_file_end
;
117 /* Initial symbol-table-debug-string vector length. */
119 #define INITIAL_STABVECTOR_LENGTH 40
121 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
122 there is any reason not to just use a #define, but might as well
123 ask BFD for the size and store it here, I guess. */
125 static unsigned local_symesz
;
127 struct xcoff_symfile_info
129 file_ptr min_lineno_offset
{}; /* Where in file lowest line#s are. */
130 file_ptr max_lineno_offset
{}; /* 1+last byte of line#s in file. */
132 /* Pointer to the string table. */
133 char *strtbl
= nullptr;
135 /* Pointer to debug section. */
136 char *debugsec
= nullptr;
138 /* Pointer to the a.out symbol table. */
139 char *symtbl
= nullptr;
141 /* Number of symbols in symtbl. */
142 int symtbl_num_syms
= 0;
144 /* Offset in data section to TOC anchor. */
145 CORE_ADDR toc_offset
= 0;
148 /* Key for XCOFF-associated data. */
150 static const registry
<objfile
>::key
<xcoff_symfile_info
> xcoff_objfile_data_key
;
152 /* Convenience macro to access the per-objfile XCOFF data. */
154 #define XCOFF_DATA(objfile) \
155 xcoff_objfile_data_key.get (objfile)
157 /* XCOFF names for dwarf sections. There is no compressed sections. */
159 static const struct dwarf2_debug_sections dwarf2_xcoff_names
= {
161 { ".dwabrev", NULL
},
164 { NULL
, NULL
}, /* debug_loclists */
165 /* AIX XCOFF defines one, named DWARF section for macro debug information.
166 XLC does not generate debug_macinfo for DWARF4 and below.
167 The section is assigned to debug_macro for DWARF5 and above. */
171 { NULL
, NULL
}, /* debug_str_offsets */
172 { NULL
, NULL
}, /* debug_line_str */
173 { ".dwrnges", NULL
},
174 { NULL
, NULL
}, /* debug_rnglists */
175 { ".dwpbtyp", NULL
},
176 { NULL
, NULL
}, /* debug_addr */
177 { ".dwframe", NULL
},
178 { NULL
, NULL
}, /* eh_frame */
179 { NULL
, NULL
}, /* gdb_index */
180 { NULL
, NULL
}, /* debug_names */
181 { NULL
, NULL
}, /* debug_aranges */
186 bf_notfound_complaint (void)
188 complaint (_("line numbers off, `.bf' symbol not found"));
192 ef_complaint (int arg1
)
194 complaint (_("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
198 eb_complaint (int arg1
)
200 complaint (_("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
203 static void xcoff_initial_scan (struct objfile
*, symfile_add_flags
);
205 static void scan_xcoff_symtab (minimal_symbol_reader
&,
206 psymtab_storage
*partial_symtabs
,
209 static const char *xcoff_next_symbol_text (struct objfile
*);
211 static void record_include_begin (struct xcoff_symbol
*);
214 enter_line_range (struct subfile
*, unsigned, unsigned,
215 CORE_ADDR
, CORE_ADDR
, unsigned *);
217 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
219 static void xcoff_symfile_init (struct objfile
*);
221 static void xcoff_new_init (struct objfile
*);
223 static void xcoff_symfile_finish (struct objfile
*);
225 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
227 static void read_symbol (struct internal_syment
*, int);
229 static int read_symbol_lineno (int);
231 static CORE_ADDR
read_symbol_nvalue (int);
233 static struct symbol
*process_xcoff_symbol (struct xcoff_symbol
*,
236 static void read_xcoff_symtab (struct objfile
*, legacy_psymtab
*);
239 static void add_stab_to_list (char *, struct pending_stabs
**);
242 static void record_include_end (struct xcoff_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 xcoff_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 xcoff_find_targ_sec_arg
*args
266 = (struct xcoff_find_targ_sec_arg
*) obj
;
267 struct objfile
*objfile
= args
->objfile
;
269 if (sect
->target_index
== args
->targ_index
)
271 /* This is the section. Figure out what SECT_OFF_* code it is. */
272 if (bfd_section_flags (sect
) & SEC_CODE
)
273 *args
->resultp
= SECT_OFF_TEXT (objfile
);
274 else if (bfd_section_flags (sect
) & SEC_LOAD
)
275 *args
->resultp
= SECT_OFF_DATA (objfile
);
277 *args
->resultp
= gdb_bfd_section_index (abfd
, sect
);
278 *args
->bfd_sect
= sect
;
282 /* Search all BFD sections for the section whose target_index is
283 equal to N_SCNUM. Set *BFD_SECT to that section. The section's
284 associated index in the objfile's section_offset table is also
287 If no match is found, *BFD_SECT is set to NULL, and *SECNUM
288 is set to the text section's number. */
291 xcoff_secnum_to_sections (int n_scnum
, struct objfile
*objfile
,
292 asection
**bfd_sect
, int *secnum
)
294 struct xcoff_find_targ_sec_arg args
;
296 args
.targ_index
= n_scnum
;
297 args
.resultp
= secnum
;
298 args
.bfd_sect
= bfd_sect
;
299 args
.objfile
= objfile
;
302 *secnum
= SECT_OFF_TEXT (objfile
);
304 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
307 /* Return the section number (SECT_OFF_*) that N_SCNUM points to. */
310 secnum_to_section (int n_scnum
, struct objfile
*objfile
)
315 xcoff_secnum_to_sections (n_scnum
, objfile
, &ignored
, &secnum
);
319 /* Return the BFD section that N_SCNUM points to. */
322 secnum_to_bfd_section (int n_scnum
, struct objfile
*objfile
)
327 xcoff_secnum_to_sections (n_scnum
, objfile
, &bfd_sect
, &ignored
);
331 /* add a given stab string into given stab vector. */
336 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
338 if (*stabvector
== NULL
)
340 *stabvector
= (struct pending_stabs
*)
341 xmalloc (sizeof (struct pending_stabs
) +
342 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
343 (*stabvector
)->count
= 0;
344 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
346 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
348 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
349 *stabvector
= (struct pending_stabs
*)
350 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
351 (*stabvector
)->length
* sizeof (char *));
353 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
358 /* Linenos are processed on a file-by-file basis.
362 1) xlc (IBM's native c compiler) postpones static function code
363 emission to the end of a compilation unit. This way it can
364 determine if those functions (statics) are needed or not, and
365 can do some garbage collection (I think). This makes line
366 numbers and corresponding addresses unordered, and we end up
367 with a line table like:
384 and that breaks gdb's binary search on line numbers, if the
385 above table is not sorted on line numbers. And that sort
386 should be on function based, since gcc can emit line numbers
389 10 0x100 - for the init/test part of a for stmt.
392 10 0x400 - for the increment part of a for stmt.
394 arrange_linetable() will do this sorting.
396 2) aix symbol table might look like:
398 c_file // beginning of a new file
399 .bi // beginning of include file
400 .ei // end of include file
404 basically, .bi/.ei pairs do not necessarily encapsulate
405 their scope. They need to be recorded, and processed later
406 on when we come the end of the compilation unit.
407 Include table (inclTable) and process_linenos() handle
412 /* Given a line table with function entries are marked, arrange its
413 functions in ascending order and strip off function entry markers
414 and return it in a newly created table. */
416 /* FIXME: I think all this stuff can be replaced by just passing
417 sort_linevec = 1 to end_compunit_symtab. */
420 arrange_linetable (std::vector
<linetable_entry
> &old_linetable
)
424 std::vector
<linetable_entry
> fentries
;
426 for (int ii
= 0; ii
< old_linetable
.size (); ++ii
)
428 if (old_linetable
[ii
].is_stmt
== 0)
431 if (old_linetable
[ii
].line
== 0)
433 /* Function entry found. */
434 fentries
.emplace_back ();
435 linetable_entry
&e
= fentries
.back ();
438 e
.pc
= old_linetable
[ii
].pc
;
440 /* If the function was compiled with XLC, we may have to add an
441 extra line entry later. Reserve space for that. */
442 if (ii
+ 1 < old_linetable
.size ()
443 && old_linetable
[ii
].pc
!= old_linetable
[ii
+ 1].pc
)
448 if (fentries
.empty ())
451 std::sort (fentries
.begin (), fentries
.end (),
452 [] (const linetable_entry
<e1
, const linetable_entry
& lte2
)
453 { return lte1
.pc
< lte2
.pc
; });
455 /* Allocate a new line table. */
456 std::vector
<linetable_entry
> new_linetable
;
457 new_linetable
.reserve (old_linetable
.size ());
459 /* If line table does not start with a function beginning, copy up until
461 for (int i
= 0; i
< old_linetable
.size () && old_linetable
[i
].line
!= 0; ++i
)
462 new_linetable
.push_back (old_linetable
[i
]);
464 /* Now copy function lines one by one. */
465 for (const linetable_entry
&entry
: fentries
)
467 /* If the function was compiled with XLC, we may have to add an
468 extra line to cover the function prologue. */
470 if (jj
+ 1 < old_linetable
.size ()
471 && old_linetable
[jj
].pc
!= old_linetable
[jj
+ 1].pc
)
473 new_linetable
.push_back (old_linetable
[jj
]);
474 new_linetable
.back ().line
= old_linetable
[jj
+ 1].line
;
477 for (jj
= entry
.line
+ 1;
478 jj
< old_linetable
.size () && old_linetable
[jj
].line
!= 0;
480 new_linetable
.push_back (old_linetable
[jj
]);
483 new_linetable
.shrink_to_fit ();
484 old_linetable
= std::move (new_linetable
);
487 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
488 following `IncludeChain'. At the end of each symtab (end_compunit_symtab),
489 we will determine if we should create additional symtab's to
490 represent if (the include files. */
493 typedef struct _inclTable
495 char *name
; /* include filename */
497 /* Offsets to the line table. end points to the last entry which is
498 part of this include file. */
501 struct subfile
*subfile
;
502 unsigned funStartLine
; /* Start line # of its function. */
506 #define INITIAL_INCLUDE_TABLE_LENGTH 20
507 static InclTable
*inclTable
; /* global include table */
508 static int inclIndx
; /* last entry to table */
509 static int inclLength
; /* table length */
510 static int inclDepth
; /* nested include depth */
512 static void allocate_include_entry (void);
515 record_include_begin (struct xcoff_symbol
*cs
)
519 /* In xcoff, we assume include files cannot be nested (not in .c files
520 of course, but in corresponding .s files.). */
522 /* This can happen with old versions of GCC.
523 GCC 2.3.3-930426 does not exhibit this on a test case which
524 a user said produced the message for him. */
525 complaint (_("Nested C_BINCL symbols"));
529 allocate_include_entry ();
531 inclTable
[inclIndx
].name
= cs
->c_name
;
532 inclTable
[inclIndx
].begin
= cs
->c_value
;
536 record_include_end (struct xcoff_symbol
*cs
)
542 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
545 allocate_include_entry ();
547 pTbl
= &inclTable
[inclIndx
];
548 pTbl
->end
= cs
->c_value
;
555 allocate_include_entry (void)
557 if (inclTable
== NULL
)
559 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
560 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
563 else if (inclIndx
>= inclLength
)
565 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
566 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
567 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
568 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
572 /* Global variable to pass the psymtab down to all the routines involved
573 in psymtab to symtab processing. */
574 static legacy_psymtab
*this_symtab_psymtab
;
576 /* Objfile related to this_symtab_psymtab; set at the same time. */
577 static struct objfile
*this_symtab_objfile
;
579 /* given the start and end addresses of a compilation unit (or a csect,
580 at times) process its lines and create appropriate line vectors. */
583 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
587 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
589 /* subfile structure for the main compilation unit. */
590 struct subfile main_subfile
;
592 /* In the main source file, any time we see a function entry, we
593 reset this variable to function's absolute starting line number.
594 All the following line numbers in the function are relative to
595 this, and we record absolute line numbers in record_line(). */
597 unsigned int main_source_baseline
= 0;
602 ((struct xcoff_symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
604 goto return_after_cleanup
;
607 /* All source lines were in the main source file. None in include
610 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
611 &main_source_baseline
);
615 /* There was source with line numbers in include files. */
618 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
619 main_source_baseline
= 0;
621 for (int ii
= 0; ii
< inclIndx
; ++ii
)
623 /* If there is main file source before include file, enter it. */
624 if (offset
< inclTable
[ii
].begin
)
627 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
628 start
, 0, &main_source_baseline
);
631 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
633 /* The entry in the include table refers to the main source
634 file. Add the lines to the main subfile. */
636 main_source_baseline
= inclTable
[ii
].funStartLine
;
638 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
639 start
, 0, &main_source_baseline
);
640 inclTable
[ii
].subfile
= &main_subfile
;
644 /* Have a new subfile for the include file. */
645 inclTable
[ii
].subfile
= new subfile
;
647 firstLine
= &(inclTable
[ii
].funStartLine
);
649 /* Enter include file's lines now. */
650 enter_line_range (inclTable
[ii
].subfile
, inclTable
[ii
].begin
,
651 inclTable
[ii
].end
, start
, 0, firstLine
);
654 if (offset
<= inclTable
[ii
].end
)
655 offset
= inclTable
[ii
].end
+ linesz
;
658 /* All the include files' line have been processed at this point. Now,
659 enter remaining lines of the main file, if any left. */
660 if (offset
< max_offset
+ 1 - linesz
)
662 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
663 &main_source_baseline
);
667 /* Process main file's line numbers. */
668 if (!main_subfile
.line_vector_entries
.empty ())
670 /* Line numbers are not necessarily ordered. xlc compilation will
671 put static function to the end. */
672 arrange_linetable (main_subfile
.line_vector_entries
);
675 /* Now, process included files' line numbers. */
677 for (int ii
= 0; ii
< inclIndx
; ++ii
)
679 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
680 && !inclTable
[ii
].subfile
->line_vector_entries
.empty ())
682 /* Line numbers are not necessarily ordered. xlc compilation will
683 put static function to the end. */
684 arrange_linetable (inclTable
[ii
].subfile
->line_vector_entries
);
688 /* For the same include file, we might want to have more than one
689 subfile. This happens if we have something like:
697 while foo.h including code in it. (stupid but possible)
698 Since start_subfile() looks at the name and uses an
699 existing one if finds, we need to provide a fake name and
703 start_subfile (inclTable
[ii
].name
);
706 /* Pick a fake name that will produce the same results as this
707 one when passed to deduce_language_from_filename. Kludge on
709 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
711 if (fakename
== NULL
)
713 start_subfile (fakename
);
715 struct subfile
*current_subfile
= get_current_subfile ();
716 current_subfile
->name
= inclTable
[ii
].name
;
717 current_subfile
->name_for_id
= inclTable
[ii
].name
;
720 start_subfile (pop_subfile ());
724 return_after_cleanup
:
726 /* We don't want to keep alloc/free'ing the global include file table. */
731 aix_process_linenos (struct objfile
*objfile
)
733 /* There is no linenos to read if there are only dwarf info. */
734 if (this_symtab_psymtab
== NULL
)
737 /* Process line numbers and enter them into line vector. */
738 process_linenos (get_last_source_start_addr (), cur_src_end_addr
);
742 /* Enter a given range of lines into the line vector.
743 can be called in the following two ways:
744 enter_line_range (subfile, beginoffset, endoffset,
745 startaddr, 0, firstLine) or
746 enter_line_range (subfile, beginoffset, 0,
747 startaddr, endaddr, firstLine)
749 endoffset points to the last line table entry that we should pay
753 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
754 unsigned endoffset
, /* offsets to line table */
755 CORE_ADDR startaddr
, /* offsets to line table */
756 CORE_ADDR endaddr
, unsigned *firstLine
)
758 struct objfile
*objfile
= this_symtab_objfile
;
759 struct gdbarch
*gdbarch
= objfile
->arch ();
760 unsigned int curoffset
;
763 struct internal_lineno int_lnno
;
764 unsigned int limit_offset
;
768 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
770 curoffset
= beginoffset
;
771 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
775 if (endoffset
>= limit_offset
)
777 complaint (_("Bad line table offset in C_EINCL directive"));
780 limit_offset
= endoffset
;
785 abfd
= objfile
->obfd
;
786 linesz
= coff_data (abfd
)->local_linesz
;
787 ext_lnno
= alloca (linesz
);
789 while (curoffset
<= limit_offset
)
791 bfd_seek (abfd
, curoffset
, SEEK_SET
);
792 bfd_bread (ext_lnno
, linesz
, abfd
);
793 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
795 /* Find the address this line represents. */
796 addr
= (int_lnno
.l_lnno
797 ? int_lnno
.l_addr
.l_paddr
798 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
799 addr
+= objfile
->text_section_offset ();
801 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
804 if (int_lnno
.l_lnno
== 0)
806 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
807 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
811 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
812 gdbarch_addr_bits_remove (gdbarch
, addr
));
818 /* Save the vital information for use when closing off the current file.
819 NAME is the file name the symbols came from, START_ADDR is the first
820 text address for the file, and SIZE is the number of bytes of text. */
822 #define complete_symtab(name, start_addr) { \
823 set_last_source_file (name); \
824 set_last_source_start_addr (start_addr); \
828 /* Refill the symbol table input buffer
829 and set the variables that control fetching entries from it.
830 Reports an error if no data available.
831 This function can read past the end of the symbol table
832 (into the string table) but this does no harm. */
834 /* Create a new minimal symbol (using record_with_info).
836 Creation of all new minimal symbols should go through this function
837 rather than calling the various record functions in order
838 to make sure that all symbol addresses get properly relocated.
842 NAME - the symbol's name (but if NAME starts with a period, that
843 leading period is discarded).
844 ADDRESS - the symbol's address, prior to relocation. This function
845 relocates the address before recording the minimal symbol.
846 MS_TYPE - the symbol's type.
847 N_SCNUM - the symbol's XCOFF section number.
848 OBJFILE - the objfile associated with the minimal symbol. */
851 record_minimal_symbol (minimal_symbol_reader
&reader
,
852 const char *name
, CORE_ADDR address
,
853 enum minimal_symbol_type ms_type
,
855 struct objfile
*objfile
)
860 reader
.record_with_info (name
, address
, ms_type
,
861 secnum_to_section (n_scnum
, objfile
));
864 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
865 nested. At any given time, a symbol can only be in one static block.
866 This is the base address of current static block, zero if non exists. */
868 static int static_block_base
= 0;
870 /* Section number for the current static block. */
872 static int static_block_section
= -1;
874 /* true if space for symbol name has been allocated. */
876 static int symname_alloced
= 0;
878 /* Next symbol to read. Pointer into raw seething symbol table. */
880 static char *raw_symbol
;
882 /* This is the function which stabsread.c calls to get symbol
886 xcoff_next_symbol_text (struct objfile
*objfile
)
888 struct internal_syment symbol
;
891 /* FIXME: is this the same as the passed arg? */
892 if (this_symtab_objfile
)
893 objfile
= this_symtab_objfile
;
895 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
898 complaint (_("Unexpected symbol continuation"));
900 /* Return something which points to '\0' and hope the symbol reading
901 code does something reasonable. */
904 else if (symbol
.n_sclass
& 0x80)
906 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
907 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
912 complaint (_("Unexpected symbol continuation"));
914 /* Return something which points to '\0' and hope the symbol reading
915 code does something reasonable. */
921 /* Read symbols for a given partial symbol table. */
924 read_xcoff_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
926 bfd
*abfd
= objfile
->obfd
;
927 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
928 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
929 char *strtbl
= xcoff
->strtbl
;
930 char *debugsec
= xcoff
->debugsec
;
931 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
933 struct internal_syment symbol
[1];
934 union internal_auxent main_aux
;
935 struct xcoff_symbol cs
[1];
936 CORE_ADDR file_start_addr
= 0;
937 CORE_ADDR file_end_addr
= 0;
939 int next_file_symnum
= -1;
940 unsigned int max_symnum
;
941 int just_started
= 1;
943 CORE_ADDR fcn_start_addr
= 0;
944 enum language pst_symtab_language
;
946 struct xcoff_symbol fcn_stab_saved
= { 0 };
948 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
949 union internal_auxent fcn_aux_saved
{};
950 struct context_stack
*newobj
;
952 const char *filestring
= pst
->filename
; /* Name of the current file. */
954 const char *last_csect_name
; /* Last seen csect's name. */
956 this_symtab_psymtab
= pst
;
957 this_symtab_objfile
= objfile
;
959 /* Get the appropriate COFF "constants" related to the file we're
961 local_symesz
= coff_data (abfd
)->local_symesz
;
963 set_last_source_file (NULL
);
965 pst_symtab_language
= deduce_language_from_filename (filestring
);
968 start_compunit_symtab (objfile
, filestring
, NULL
, file_start_addr
,
969 pst_symtab_language
);
970 record_debugformat (debugfmt
);
971 symnum
= ((struct xcoff_symloc
*) pst
->read_symtab_private
)->first_symnum
;
973 symnum
+ ((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
;
974 first_object_file_end
= 0;
976 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
978 while (symnum
< max_symnum
)
980 QUIT
; /* make this command interruptable. */
982 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
983 /* read one symbol into `cs' structure. After processing the
984 whole symbol table, only string table will be kept in memory,
985 symbol table and debug section of xcoff will be freed. Thus
986 we can mark symbols with names in string table as
991 /* Swap and align the symbol into a reasonable C structure. */
992 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
994 cs
->c_symnum
= symnum
;
995 cs
->c_naux
= symbol
->n_numaux
;
996 if (symbol
->n_zeroes
)
999 /* We must use the original, unswapped, name here so the name field
1000 pointed to by cs->c_name will persist throughout xcoffread. If
1001 we use the new field, it gets overwritten for each symbol. */
1002 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1003 /* If it's exactly E_SYMNMLEN characters long it isn't
1005 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1009 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1011 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1012 p
[E_SYMNMLEN
] = '\0';
1014 symname_alloced
= 1;
1017 else if (symbol
->n_sclass
& 0x80)
1019 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1020 symname_alloced
= 0;
1024 /* in string table */
1025 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1026 symname_alloced
= 1;
1028 cs
->c_value
= symbol
->n_value
;
1029 cs
->c_sclass
= symbol
->n_sclass
;
1030 cs
->c_secnum
= symbol
->n_scnum
;
1031 cs
->c_type
= (unsigned) symbol
->n_type
;
1033 raw_symbol
+= local_symesz
;
1036 /* Save addr of first aux entry. */
1037 raw_auxptr
= raw_symbol
;
1039 /* Skip all the auxents associated with this symbol. */
1040 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1042 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1047 /* if symbol name starts with ".$" or "$", ignore it. */
1048 if (cs
->c_name
[0] == '$'
1049 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1052 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1054 if (get_last_source_file ())
1056 pst
->compunit_symtab
= end_compunit_symtab
1057 (cur_src_end_addr
, SECT_OFF_TEXT (objfile
));
1062 start_compunit_symtab (objfile
, "_globals_", NULL
,
1063 0, pst_symtab_language
);
1064 record_debugformat (debugfmt
);
1065 cur_src_end_addr
= first_object_file_end
;
1066 /* Done with all files, everything from here on is globals. */
1069 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1070 cs
->c_sclass
== C_WEAKEXT
)
1072 /* Dealing with a symbol with a csect entry. */
1074 #define CSECT(PP) ((PP)->x_csect)
1075 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1076 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1077 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1078 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1080 /* Convert the auxent to something we can access.
1081 XCOFF can have more than one auxiliary entries.
1083 Actual functions will have two auxiliary entries, one to have the
1084 function size and other to have the smtype/smclass (LD/PR).
1086 c_type value of main symbol table will be set only in case of
1087 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1088 Bit 10 of type is set if symbol is a function, ie the value is set
1089 to 32(0x20). So we need to read the first function auxiliary entry
1090 which contains the size. */
1091 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1093 /* a function entry point. */
1095 fcn_start_addr
= cs
->c_value
;
1097 /* save the function header info, which will be used
1098 when `.bf' is seen. */
1101 /* Convert the auxent to something we can access. */
1102 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1103 0, cs
->c_naux
, &fcn_aux_saved
);
1106 /* Read the csect auxiliary header, which is always the last by
1108 bfd_coff_swap_aux_in (abfd
,
1110 + ((coff_data (abfd
)->local_symesz
)
1111 * (cs
->c_naux
- 1)),
1112 cs
->c_type
, cs
->c_sclass
,
1113 cs
->c_naux
- 1, cs
->c_naux
,
1116 switch (CSECT_SMTYP (&main_aux
))
1120 /* Ignore all external references. */
1124 /* A section description. */
1126 switch (CSECT_SCLAS (&main_aux
))
1132 /* A program csect is seen. We have to allocate one
1133 symbol table for each program csect. Normally gdb
1134 prefers one symtab for each source file. In case
1135 of AIX, one source file might include more than one
1136 [PR] csect, and they don't have to be adjacent in
1137 terms of the space they occupy in memory. Thus, one
1138 single source file might get fragmented in the
1139 memory and gdb's file start and end address
1140 approach does not work! GCC (and I think xlc) seem
1141 to put all the code in the unnamed program csect. */
1143 if (last_csect_name
)
1145 complete_symtab (filestring
, file_start_addr
);
1146 cur_src_end_addr
= file_end_addr
;
1147 end_compunit_symtab (file_end_addr
,
1148 SECT_OFF_TEXT (objfile
));
1151 /* Give all csects for this source file the same
1153 start_compunit_symtab (objfile
, filestring
, NULL
,
1154 0, pst_symtab_language
);
1155 record_debugformat (debugfmt
);
1158 /* If this is the very first csect seen,
1159 basically `__start'. */
1162 first_object_file_end
1163 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1168 cs
->c_value
+ objfile
->text_section_offset ();
1169 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1171 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1172 last_csect_name
= cs
->c_name
;
1176 /* All other symbols are put into the minimal symbol
1189 /* Ignore the symbol. */
1197 switch (CSECT_SCLAS (&main_aux
))
1199 /* We never really come to this part as this case has been
1200 handled in ISFCN check above.
1201 This and other cases of XTY_LD are kept just for
1207 /* shared library function trampoline code entry point. */
1211 /* The symbols often have the same names as debug symbols for
1212 functions, and confuse lookup_symbol. */
1216 /* xlc puts each variable in a separate csect, so we get
1217 an XTY_SD for each variable. But gcc puts several
1218 variables in a csect, so that each variable only gets
1219 an XTY_LD. This will typically be XMC_RW; I suspect
1220 XMC_RO and XMC_BS might be possible too.
1221 These variables are put in the minimal symbol table
1228 /* Common symbols are put into the minimal symbol table only. */
1236 switch (cs
->c_sclass
)
1240 /* c_value field contains symnum of next .file entry in table
1241 or symnum of first global after last .file. */
1243 next_file_symnum
= cs
->c_value
;
1245 /* Complete symbol table for last object file containing
1246 debugging information. */
1248 /* Whether or not there was a csect in the previous file, we
1249 have to call `end_stabs' and `start_stabs' to reset
1250 type_vector, line_vector, etc. structures. */
1252 complete_symtab (filestring
, file_start_addr
);
1253 cur_src_end_addr
= file_end_addr
;
1254 end_compunit_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1257 /* XCOFF, according to the AIX 3.2 documentation, puts the
1258 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1259 do things the standard COFF way and put it in the auxent.
1260 We use the auxent if the symbol is ".file" and an auxent
1261 exists, otherwise use the symbol itself. Simple
1263 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1265 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1266 0, cs
->c_naux
, &main_aux
);
1267 filestring
= coff_getfilename (&main_aux
, objfile
);
1270 filestring
= cs
->c_name
;
1273 start_compunit_symtab (objfile
, filestring
, NULL
, 0,
1274 pst_symtab_language
);
1275 record_debugformat (debugfmt
);
1276 last_csect_name
= 0;
1278 /* reset file start and end addresses. A compilation unit
1279 with no text (only data) should have zero file
1281 file_start_addr
= file_end_addr
= 0;
1285 fcn_stab_saved
= *cs
;
1289 if (strcmp (cs
->c_name
, ".bf") == 0)
1291 CORE_ADDR off
= objfile
->text_section_offset ();
1293 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1294 0, cs
->c_naux
, &main_aux
);
1296 within_function
= 1;
1298 newobj
= push_context (0, fcn_start_addr
+ off
);
1300 newobj
->name
= define_symbol
1301 (fcn_cs_saved
.c_value
+ off
,
1302 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1303 if (newobj
->name
!= NULL
)
1304 newobj
->name
->set_section_index (SECT_OFF_TEXT (objfile
));
1306 else if (strcmp (cs
->c_name
, ".ef") == 0)
1308 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1309 0, cs
->c_naux
, &main_aux
);
1311 /* The value of .ef is the address of epilogue code;
1312 not useful for gdb. */
1313 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1314 contains number of lines to '}' */
1316 if (outermost_context_p ())
1317 { /* We attempted to pop an empty context stack. */
1318 ef_complaint (cs
->c_symnum
);
1319 within_function
= 0;
1322 struct context_stack cstk
= pop_context ();
1323 /* Stack must be empty now. */
1324 if (!outermost_context_p ())
1326 ef_complaint (cs
->c_symnum
);
1327 within_function
= 0;
1331 finish_block (cstk
.name
, cstk
.old_blocks
,
1332 NULL
, cstk
.start_addr
,
1333 (fcn_cs_saved
.c_value
1334 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1335 + objfile
->text_section_offset ()));
1336 within_function
= 0;
1341 /* Begin static block. */
1343 struct internal_syment static_symbol
;
1345 read_symbol (&static_symbol
, cs
->c_value
);
1346 static_block_base
= static_symbol
.n_value
;
1347 static_block_section
=
1348 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1353 /* End of static block. */
1354 static_block_base
= 0;
1355 static_block_section
= -1;
1366 complaint (_("Unrecognized storage class %d."),
1381 /* beginning of include file */
1382 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1383 order. Thus, when wee see them, we might not know enough info
1384 to process them. Thus, we'll be saving them into a table
1385 (inclTable) and postpone their processing. */
1387 record_include_begin (cs
);
1391 /* End of include file. */
1392 /* See the comment after case C_BINCL. */
1393 record_include_end (cs
);
1397 if (strcmp (cs
->c_name
, ".bb") == 0)
1400 newobj
= push_context (depth
,
1402 + objfile
->text_section_offset ()));
1404 else if (strcmp (cs
->c_name
, ".eb") == 0)
1406 if (outermost_context_p ())
1407 { /* We attempted to pop an empty context stack. */
1408 eb_complaint (cs
->c_symnum
);
1411 struct context_stack cstk
= pop_context ();
1412 if (depth
-- != cstk
.depth
)
1414 eb_complaint (cs
->c_symnum
);
1417 if (*get_local_symbols () && !outermost_context_p ())
1419 /* Make a block for the local symbols within. */
1420 finish_block (cstk
.name
,
1421 cstk
.old_blocks
, NULL
,
1424 + objfile
->text_section_offset ()));
1426 *get_local_symbols () = cstk
.locals
;
1431 process_xcoff_symbol (cs
, objfile
);
1436 if (get_last_source_file ())
1438 struct compunit_symtab
*cust
;
1440 complete_symtab (filestring
, file_start_addr
);
1441 cur_src_end_addr
= file_end_addr
;
1442 cust
= end_compunit_symtab (file_end_addr
, SECT_OFF_TEXT (objfile
));
1443 /* When reading symbols for the last C_FILE of the objfile, try
1444 to make sure that we set pst->compunit_symtab to the symtab for the
1445 file, not to the _globals_ symtab. I'm not sure whether this
1446 actually works right or when/if it comes up. */
1447 if (pst
->compunit_symtab
== NULL
)
1448 pst
->compunit_symtab
= cust
;
1453 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1454 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1458 /* process one xcoff symbol. */
1460 static struct symbol
*
1461 process_xcoff_symbol (struct xcoff_symbol
*cs
, struct objfile
*objfile
)
1463 struct symbol onesymbol
;
1464 struct symbol
*sym
= &onesymbol
;
1465 struct symbol
*sym2
= NULL
;
1471 if (cs
->c_secnum
< 0)
1473 /* The value is a register number, offset within a frame, etc.,
1474 and does not get relocated. */
1480 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1481 off
= objfile
->section_offsets
[sec
];
1488 /* default assumptions */
1489 sym
->set_value_address (cs
->c_value
+ off
);
1490 sym
->set_domain (VAR_DOMAIN
);
1491 sym
->set_section_index (secnum_to_section (cs
->c_secnum
, objfile
));
1493 if (ISFCN (cs
->c_type
))
1495 /* At this point, we don't know the type of the function. This
1496 will be patched with the type from its stab entry later on in
1497 patch_block_stabs (), unless the file was compiled without -g. */
1499 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1500 sym
->set_type (objfile_type (objfile
)->nodebug_text_symbol
);
1502 sym
->set_aclass_index (LOC_BLOCK
);
1503 sym2
= new (&objfile
->objfile_obstack
) symbol (*sym
);
1505 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1506 add_symbol_to_list (sym2
, get_global_symbols ());
1507 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1508 add_symbol_to_list (sym2
, get_file_symbols ());
1512 /* In case we can't figure out the type, provide default. */
1513 sym
->set_type (objfile_type (objfile
)->nodebug_data_symbol
);
1515 switch (cs
->c_sclass
)
1518 /* The values of functions and global symbols are now resolved
1519 via the global_sym_chain in stabsread.c. */
1521 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1522 add_stab_to_list (name
, &global_stabs
);
1524 add_stab_to_list (name
, &file_stabs
);
1528 add_stab_to_list (name
, &global_stabs
);
1533 common_block_start (cs
->c_name
, objfile
);
1537 common_block_end (objfile
);
1541 complaint (_("Unexpected storage class: %d"),
1554 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1557 sym
->set_section_index (sec
);
1564 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1565 all statics and we need to distinguish file-scope versus
1566 function-scope using within_function. We do this by
1567 changing the string we pass to define_symbol to use 'S'
1568 where we need to, which is not necessarily super-clean,
1569 but seems workable enough. */
1574 pp
= strchr (name
, ':');
1579 if (*pp
== 'V' && !within_function
)
1581 sym
= define_symbol ((cs
->c_value
1582 + objfile
->section_offsets
[static_block_section
]),
1583 cs
->c_name
, 0, 0, objfile
);
1586 sym
->set_value_address
1587 (sym
->value_address () + static_block_base
);
1588 sym
->set_section_index (static_block_section
);
1597 /* Extract the file name from the aux entry of a C_FILE symbol.
1598 Result is in static storage and is only good for temporary use. */
1601 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1603 static char buffer
[BUFSIZ
];
1605 if (aux_entry
->x_file
.x_n
.x_n
.x_zeroes
== 0)
1606 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1607 + aux_entry
->x_file
.x_n
.x_n
.x_offset
));
1610 strncpy (buffer
, aux_entry
->x_file
.x_n
.x_fname
, FILNMLEN
);
1611 buffer
[FILNMLEN
] = '\0';
1616 /* Set *SYMBOL to symbol number symno in symtbl. */
1618 read_symbol (struct internal_syment
*symbol
, int symno
)
1620 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1621 int nsyms
= xcoff
->symtbl_num_syms
;
1622 char *stbl
= xcoff
->symtbl
;
1624 if (symno
< 0 || symno
>= nsyms
)
1626 complaint (_("Invalid symbol offset"));
1627 symbol
->n_value
= 0;
1628 symbol
->n_scnum
= -1;
1631 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
,
1632 stbl
+ (symno
* local_symesz
),
1636 /* Get value corresponding to symbol number symno in symtbl. */
1639 read_symbol_nvalue (int symno
)
1641 struct internal_syment symbol
[1];
1643 read_symbol (symbol
, symno
);
1644 return symbol
->n_value
;
1648 /* Find the address of the function corresponding to symno, where
1649 symno is the symbol pointed to by the linetable. */
1652 read_symbol_lineno (int symno
)
1654 struct objfile
*objfile
= this_symtab_objfile
;
1655 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1657 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1658 int nsyms
= info
->symtbl_num_syms
;
1659 char *stbl
= info
->symtbl
;
1660 char *strtbl
= info
->strtbl
;
1662 struct internal_syment symbol
[1];
1663 union internal_auxent main_aux
[1];
1667 bf_notfound_complaint ();
1671 /* Note that just searching for a short distance (e.g. 50 symbols)
1672 is not enough, at least in the following case.
1675 [many .stabx entries]
1676 [a few functions, referring to foo]
1680 What happens here is that the assembler moves the .stabx entries
1681 to right before the ".bf" for foo, but the symbol for "foo" is before
1682 all the stabx entries. See PR gdb/2222. */
1684 /* Maintaining a table of .bf entries might be preferable to this search.
1685 If I understand things correctly it would need to be done only for
1686 the duration of a single psymtab to symtab conversion. */
1687 while (symno
< nsyms
)
1689 bfd_coff_swap_sym_in (symfile_bfd
,
1690 stbl
+ (symno
* local_symesz
), symbol
);
1691 if (symbol
->n_sclass
== C_FCN
)
1693 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1695 if (strcmp (name
, ".bf") == 0)
1698 symno
+= symbol
->n_numaux
+ 1;
1701 bf_notfound_complaint ();
1705 /* Take aux entry and return its lineno. */
1707 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1708 symbol
->n_type
, symbol
->n_sclass
,
1709 0, symbol
->n_numaux
, main_aux
);
1711 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1714 /* Support for line number handling. */
1716 /* This function is called for every section; it finds the outer limits
1717 * of the line table (minimum and maximum file offset) so that the
1718 * mainline code can read the whole thing for efficiency.
1721 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1723 struct xcoff_symfile_info
*info
;
1725 file_ptr offset
, maxoff
;
1727 count
= asect
->lineno_count
;
1729 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1732 size
= count
* coff_data (abfd
)->local_linesz
;
1733 info
= (struct xcoff_symfile_info
*) vpinfo
;
1734 offset
= asect
->line_filepos
;
1735 maxoff
= offset
+ size
;
1737 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1738 info
->min_lineno_offset
= offset
;
1740 if (maxoff
> info
->max_lineno_offset
)
1741 info
->max_lineno_offset
= maxoff
;
1745 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1747 gdb_assert (!pst
->readin
);
1749 /* Read in all partial symtabs on which this one is dependent. */
1750 pst
->expand_dependencies (objfile
);
1752 if (((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1754 /* Init stuff necessary for reading in symbols. */
1757 scoped_free_pendings free_pending
;
1758 read_xcoff_symtab (objfile
, pst
);
1764 /* Read in all of the symbols for a given psymtab for real.
1765 Be verbose about it if the user wants that. SELF is not NULL. */
1768 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1770 gdb_assert (!self
->readin
);
1772 if (((struct xcoff_symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1773 || self
->number_of_dependencies
)
1775 next_symbol_text_func
= xcoff_next_symbol_text
;
1777 self
->expand_psymtab (objfile
);
1779 /* Match with global symbols. This only needs to be done once,
1780 after all of the symtabs and dependencies have been read in. */
1781 scan_file_globals (objfile
);
1786 xcoff_new_init (struct objfile
*objfile
)
1788 stabsread_new_init ();
1791 /* Do initialization in preparation for reading symbols from OBJFILE.
1793 We will only be called if this is an XCOFF or XCOFF-like file.
1794 BFD handles figuring out the format of the file, and code in symfile.c
1795 uses BFD's determination to vector to us. */
1798 xcoff_symfile_init (struct objfile
*objfile
)
1800 /* Allocate struct to keep track of the symfile. */
1801 xcoff_objfile_data_key
.emplace (objfile
);
1803 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1804 find this causes a significant slowdown in gdb then we could
1805 set it in the debug symbol readers only when necessary. */
1806 objfile
->flags
|= OBJF_REORDERED
;
1809 /* Perform any local cleanups required when we are done with a particular
1810 objfile. I.E, we are in the process of discarding all symbol information
1811 for an objfile, freeing up all memory held for it, and unlinking the
1812 objfile struct from the global list of known objfiles. */
1815 xcoff_symfile_finish (struct objfile
*objfile
)
1817 /* Start with a fresh include table for the next objfile. */
1823 inclIndx
= inclLength
= inclDepth
= 0;
1828 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1832 unsigned char lengthbuf
[4];
1834 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1836 xcoff
->strtbl
= NULL
;
1838 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1839 error (_("cannot seek to string table in %s: %s"),
1840 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1842 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1843 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1845 /* If no string table is needed, then the file may end immediately
1846 after the symbols. Just return with `strtbl' set to NULL. */
1848 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1851 /* Allocate string table from objfile_obstack. We will need this table
1852 as long as we have its symbol table around. */
1854 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1855 xcoff
->strtbl
= strtbl
;
1857 /* Copy length buffer, the first byte is usually zero and is
1858 used for stabs with a name length of zero. */
1859 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1860 if (length
== sizeof lengthbuf
)
1863 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1865 if (val
!= length
- sizeof lengthbuf
)
1866 error (_("cannot read string table from %s: %s"),
1867 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1868 if (strtbl
[length
- 1] != '\0')
1869 error (_("bad symbol file: string table "
1870 "does not end with null character"));
1875 /* If we have not yet seen a function for this psymtab, this is 0. If we
1876 have seen one, it is the offset in the line numbers of the line numbers
1878 static unsigned int first_fun_line_offset
;
1880 /* Allocate and partially fill a partial symtab. It will be
1881 completely filled at the end of the symbol list.
1883 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1884 is the address relative to which its symbols are (incremental) or 0
1887 static legacy_psymtab
*
1888 xcoff_start_psymtab (psymtab_storage
*partial_symtabs
,
1889 struct objfile
*objfile
,
1890 const char *filename
, int first_symnum
)
1892 /* We fill in textlow later. */
1893 legacy_psymtab
*result
= new legacy_psymtab (filename
, partial_symtabs
,
1894 objfile
->per_bfd
, 0);
1896 result
->read_symtab_private
=
1897 XOBNEW (&objfile
->objfile_obstack
, struct xcoff_symloc
);
1898 ((struct xcoff_symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1899 result
->legacy_read_symtab
= xcoff_read_symtab
;
1900 result
->legacy_expand_psymtab
= xcoff_expand_psymtab
;
1902 /* Deduce the source language from the filename for this psymtab. */
1903 psymtab_language
= deduce_language_from_filename (filename
);
1908 /* Close off the current usage of PST.
1909 Returns PST, or NULL if the partial symtab was empty and thrown away.
1911 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1913 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1914 are the information for includes and dependencies. */
1916 static legacy_psymtab
*
1917 xcoff_end_psymtab (struct objfile
*objfile
, psymtab_storage
*partial_symtabs
,
1918 legacy_psymtab
*pst
,
1919 const char **include_list
, int num_includes
,
1920 int capping_symbol_number
,
1921 legacy_psymtab
**dependency_list
,
1922 int number_dependencies
, int textlow_not_set
)
1926 if (capping_symbol_number
!= -1)
1927 ((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
=
1928 capping_symbol_number
1929 - ((struct xcoff_symloc
*) pst
->read_symtab_private
)->first_symnum
;
1930 ((struct xcoff_symloc
*) pst
->read_symtab_private
)->lineno_off
=
1931 first_fun_line_offset
;
1932 first_fun_line_offset
= 0;
1936 pst
->number_of_dependencies
= number_dependencies
;
1937 if (number_dependencies
)
1940 = partial_symtabs
->allocate_dependencies (number_dependencies
);
1941 memcpy (pst
->dependencies
, dependency_list
,
1942 number_dependencies
* sizeof (legacy_psymtab
*));
1945 pst
->dependencies
= 0;
1947 for (i
= 0; i
< num_includes
; i
++)
1949 legacy_psymtab
*subpst
=
1950 new legacy_psymtab (include_list
[i
], partial_symtabs
, objfile
->per_bfd
);
1952 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, xcoff_symloc
);
1953 ((struct xcoff_symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
1954 ((struct xcoff_symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
1956 /* We could save slight bits of space by only making one of these,
1957 shared by the entire set of include files. FIXME-someday. */
1958 subpst
->dependencies
=
1959 partial_symtabs
->allocate_dependencies (1);
1960 subpst
->dependencies
[0] = pst
;
1961 subpst
->number_of_dependencies
= 1;
1963 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
1964 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
1967 if (num_includes
== 0
1968 && number_dependencies
== 0
1971 /* Throw away this psymtab, it's empty. */
1972 /* Empty psymtabs happen as a result of header files which don't have
1973 any symbols in them. There can be a lot of them. */
1975 partial_symtabs
->discard_psymtab (pst
);
1977 /* Indicate that psymtab was thrown away. */
1983 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
1984 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
1985 the symbol and its auxents. */
1988 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
1989 const char **name
, char **raw
, unsigned int *symnump
,
1990 struct objfile
*objfile
)
1992 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
1993 if (symbol
->n_zeroes
)
1995 /* If it's exactly E_SYMNMLEN characters long it isn't
1997 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
1999 /* FIXME: wastes memory for symbols which we don't end up putting
2000 into the minimal symbols. */
2003 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
2005 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2006 p
[E_SYMNMLEN
] = '\0';
2010 /* Point to the unswapped name as that persists as long as the
2012 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2014 else if (symbol
->n_sclass
& 0x80)
2016 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2020 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2023 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2024 if (symbol
->n_numaux
> 0)
2026 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2027 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2029 *symnump
+= symbol
->n_numaux
;
2030 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2035 function_outside_compilation_unit_complaint (const char *arg1
)
2037 complaint (_("function `%s' appears to be defined "
2038 "outside of all compilation units"),
2043 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2044 psymtab_storage
*partial_symtabs
,
2045 struct objfile
*objfile
)
2047 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2048 const char *filestring
= NULL
;
2050 const char *namestring
;
2055 /* Current partial symtab */
2056 legacy_psymtab
*pst
;
2058 /* List of current psymtab's include files. */
2059 const char **psymtab_include_list
;
2060 int includes_allocated
;
2063 /* Index within current psymtab dependency list. */
2064 legacy_psymtab
**dependency_list
;
2065 int dependencies_used
, dependencies_allocated
;
2068 struct internal_syment symbol
;
2069 union internal_auxent main_aux
[5];
2070 unsigned int ssymnum
;
2072 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2073 CORE_ADDR last_csect_val
= 0;
2074 int last_csect_sec
= 0;
2075 int misc_func_recorded
= 0; /* true if any misc. function. */
2076 int textlow_not_set
= 1;
2078 pst
= (legacy_psymtab
*) 0;
2080 includes_allocated
= 30;
2082 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2083 sizeof (const char *));
2085 dependencies_allocated
= 30;
2086 dependencies_used
= 0;
2088 (legacy_psymtab
**) alloca (dependencies_allocated
*
2089 sizeof (legacy_psymtab
*));
2091 set_last_source_file (NULL
);
2093 abfd
= objfile
->obfd
;
2094 next_symbol_text_func
= xcoff_next_symbol_text
;
2096 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2097 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2099 while (ssymnum
< nsyms
)
2105 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2106 sclass
= symbol
.n_sclass
;
2114 /* The CSECT auxent--always the last auxent. */
2115 union internal_auxent csect_aux
;
2116 unsigned int symnum_before
= ssymnum
;
2118 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2120 if (symbol
.n_numaux
> 1)
2122 bfd_coff_swap_aux_in
2124 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2127 symbol
.n_numaux
- 1,
2132 csect_aux
= main_aux
[0];
2134 /* If symbol name starts with ".$" or "$", ignore it. */
2135 if (namestring
[0] == '$'
2136 || (namestring
[0] == '.' && namestring
[1] == '$'))
2139 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2142 switch (csect_aux
.x_csect
.x_smclas
)
2145 if (last_csect_name
)
2147 /* If no misc. function recorded in the last
2148 seen csect, enter it as a function. This
2149 will take care of functions like strcmp()
2152 if (!misc_func_recorded
)
2154 record_minimal_symbol
2155 (reader
, last_csect_name
, last_csect_val
,
2156 mst_text
, last_csect_sec
, objfile
);
2157 misc_func_recorded
= 1;
2162 /* We have to allocate one psymtab for
2163 each program csect, because their text
2164 sections need not be adjacent. */
2166 (objfile
, partial_symtabs
, pst
, psymtab_include_list
,
2167 includes_used
, symnum_before
, dependency_list
,
2168 dependencies_used
, textlow_not_set
);
2170 dependencies_used
= 0;
2171 /* Give all psymtabs for this source file the same
2173 pst
= xcoff_start_psymtab
2174 (partial_symtabs
, objfile
,
2179 /* Activate the misc_func_recorded mechanism for
2180 compiler- and linker-generated CSECTs like ".strcmp"
2182 if (namestring
&& (namestring
[0] == '.'
2183 || namestring
[0] == '@'))
2185 last_csect_name
= namestring
;
2186 last_csect_val
= symbol
.n_value
;
2187 last_csect_sec
= symbol
.n_scnum
;
2192 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2194 if (highval
> pst
->raw_text_high ())
2195 pst
->set_text_high (highval
);
2196 if (!pst
->text_low_valid
2197 || symbol
.n_value
< pst
->raw_text_low ())
2198 pst
->set_text_low (symbol
.n_value
);
2200 misc_func_recorded
= 0;
2205 /* Data variables are recorded in the minimal symbol
2206 table, except for section symbols. */
2207 if (*namestring
!= '.')
2208 record_minimal_symbol
2209 (reader
, namestring
, symbol
.n_value
,
2210 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2211 symbol
.n_scnum
, objfile
);
2216 warning (_("More than one XMC_TC0 symbol found."));
2217 toc_offset
= symbol
.n_value
;
2219 /* Make TOC offset relative to start address of
2221 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2223 toc_offset
-= bfd_section_vma (bfd_sect
);
2227 /* These symbols tell us where the TOC entry for a
2228 variable is, not the variable itself. */
2237 switch (csect_aux
.x_csect
.x_smclas
)
2240 /* A function entry point. */
2242 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2243 first_fun_line_offset
=
2244 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2246 record_minimal_symbol
2247 (reader
, namestring
, symbol
.n_value
,
2248 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2249 symbol
.n_scnum
, objfile
);
2250 misc_func_recorded
= 1;
2254 /* shared library function trampoline code entry
2257 /* record trampoline code entries as
2258 mst_solib_trampoline symbol. When we lookup mst
2259 symbols, we will choose mst_text over
2260 mst_solib_trampoline. */
2261 record_minimal_symbol
2262 (reader
, namestring
, symbol
.n_value
,
2263 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2264 misc_func_recorded
= 1;
2268 /* The symbols often have the same names as
2269 debug symbols for functions, and confuse
2275 /* xlc puts each variable in a separate csect,
2276 so we get an XTY_SD for each variable. But
2277 gcc puts several variables in a csect, so
2278 that each variable only gets an XTY_LD. We
2279 still need to record them. This will
2280 typically be XMC_RW; I suspect XMC_RO and
2281 XMC_BS might be possible too. */
2282 if (*namestring
!= '.')
2283 record_minimal_symbol
2284 (reader
, namestring
, symbol
.n_value
,
2285 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2286 symbol
.n_scnum
, objfile
);
2292 switch (csect_aux
.x_csect
.x_smclas
)
2296 /* Common variables are recorded in the minimal symbol
2297 table, except for section symbols. */
2298 if (*namestring
!= '.')
2299 record_minimal_symbol
2300 (reader
, namestring
, symbol
.n_value
,
2301 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2302 symbol
.n_scnum
, objfile
);
2314 unsigned int symnum_before
;
2316 symnum_before
= ssymnum
;
2317 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2320 /* See if the last csect needs to be recorded. */
2322 if (last_csect_name
&& !misc_func_recorded
)
2324 /* If no misc. function recorded in the last seen csect, enter
2325 it as a function. This will take care of functions like
2326 strcmp() compiled by xlc. */
2328 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2329 mst_text
, last_csect_sec
, objfile
);
2330 misc_func_recorded
= 1;
2335 xcoff_end_psymtab (objfile
, partial_symtabs
,
2336 pst
, psymtab_include_list
,
2337 includes_used
, symnum_before
,
2338 dependency_list
, dependencies_used
,
2341 dependencies_used
= 0;
2343 first_fun_line_offset
= 0;
2345 /* XCOFF, according to the AIX 3.2 documentation, puts the
2346 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2347 do things the standard COFF way and put it in the auxent.
2348 We use the auxent if the symbol is ".file" and an auxent
2349 exists, otherwise use the symbol itself. */
2350 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2352 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2355 filestring
= namestring
;
2357 pst
= xcoff_start_psymtab (partial_symtabs
, objfile
,
2360 last_csect_name
= NULL
;
2366 complaint (_("Storage class %d not recognized during scan"),
2372 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2373 to handle only the C_FUN and C_EXT. */
2387 /* C_EINCL means we are switching back to the main file. But there
2388 is no reason to care; the only thing we want to know about
2389 includes is the names of all the included (.h) files. */
2394 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2398 /* I don't think the name of the common block (as opposed to the
2399 variables within it) is something which is user visible
2407 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2408 so C_LSYM would appear to be only for locals. */
2414 /* We probably could save a few instructions by assuming that
2415 C_LSYM, C_PSYM, etc., never have auxents. */
2416 int naux1
= symbol
.n_numaux
+ 1;
2419 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2425 /* Mark down an include file in the current psymtab. */
2426 enum language tmp_language
;
2428 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2431 tmp_language
= deduce_language_from_filename (namestring
);
2433 /* Only change the psymtab's language if we've learned
2434 something useful (eg. tmp_language is not language_unknown).
2435 In addition, to match what start_subfile does, never change
2437 if (tmp_language
!= language_unknown
2438 && (tmp_language
!= language_c
2439 || psymtab_language
!= language_cplus
))
2440 psymtab_language
= tmp_language
;
2442 /* In C++, one may expect the same filename to come round many
2443 times, when code is coming alternately from the main file
2444 and from inline functions in other files. So I check to see
2445 if this is a file we've seen before -- either the main
2446 source file, or a previously included file.
2448 This seems to be a lot of time to be spending on N_SOL, but
2449 things like "break c-exp.y:435" need to work (I
2450 suppose the psymtab_include_list could be hashed or put
2451 in a binary tree, if profiling shows this is a major hog). */
2452 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2458 for (i
= 0; i
< includes_used
; i
++)
2459 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2467 psymtab_include_list
[includes_used
++] = namestring
;
2468 if (includes_used
>= includes_allocated
)
2470 const char **orig
= psymtab_include_list
;
2472 psymtab_include_list
= (const char **)
2473 alloca ((includes_allocated
*= 2) *
2474 sizeof (const char *));
2475 memcpy (psymtab_include_list
, orig
,
2476 includes_used
* sizeof (const char *));
2481 /* The value of the C_FUN is not the address of the function (it
2482 appears to be the address before linking), but as long as it
2483 is smaller than the actual address, then find_pc_partial_function
2484 will use the minimal symbols instead. I hope. */
2493 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2496 p
= strchr (namestring
, ':');
2498 continue; /* Not a debugging symbol. */
2500 /* Main processing section for debugging symbols which
2501 the initial read through the symbol tables needs to worry
2502 about. If we reach this point, the symbol which we are
2503 considering is definitely one we are interested in.
2504 p must also contain the (valid) index into the namestring
2505 which indicates the debugging type symbol. */
2510 pst
->add_psymbol (gdb::string_view (namestring
,
2512 true, VAR_DOMAIN
, LOC_STATIC
,
2513 SECT_OFF_DATA (objfile
),
2514 psymbol_placement::STATIC
,
2517 partial_symtabs
, objfile
);
2521 /* The addresses in these entries are reported to be
2522 wrong. See the code that reads 'G's for symtabs. */
2523 pst
->add_psymbol (gdb::string_view (namestring
,
2525 true, VAR_DOMAIN
, LOC_STATIC
,
2526 SECT_OFF_DATA (objfile
),
2527 psymbol_placement::GLOBAL
,
2530 partial_symtabs
, objfile
);
2534 /* When a 'T' entry is defining an anonymous enum, it
2535 may have a name which is the empty string, or a
2536 single space. Since they're not really defining a
2537 symbol, those shouldn't go in the partial symbol
2538 table. We do pick up the elements of such enums at
2539 'check_enum:', below. */
2540 if (p
>= namestring
+ 2
2541 || (p
== namestring
+ 1
2542 && namestring
[0] != ' '))
2544 pst
->add_psymbol (gdb::string_view (namestring
,
2546 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2547 psymbol_placement::STATIC
,
2548 0, psymtab_language
,
2549 partial_symtabs
, objfile
);
2552 /* Also a typedef with the same name. */
2553 pst
->add_psymbol (gdb::string_view (namestring
,
2555 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2556 psymbol_placement::STATIC
,
2557 0, psymtab_language
,
2558 partial_symtabs
, objfile
);
2565 if (p
!= namestring
) /* a name is there, not just :T... */
2567 pst
->add_psymbol (gdb::string_view (namestring
,
2569 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2570 psymbol_placement::STATIC
,
2571 0, psymtab_language
,
2572 partial_symtabs
, objfile
);
2575 /* If this is an enumerated type, we need to
2576 add all the enum constants to the partial symbol
2577 table. This does not cover enums without names, e.g.
2578 "enum {a, b} c;" in C, but fortunately those are
2579 rare. There is no way for GDB to find those from the
2580 enum type without spending too much time on it. Thus
2581 to solve this problem, the compiler needs to put out the
2582 enum in a nameless type. GCC2 does this. */
2584 /* We are looking for something of the form
2585 <name> ":" ("t" | "T") [<number> "="] "e"
2586 {<constant> ":" <value> ","} ";". */
2588 /* Skip over the colon and the 't' or 'T'. */
2590 /* This type may be given a number. Also, numbers can come
2591 in pairs like (0,26). Skip over it. */
2592 while ((*p
>= '0' && *p
<= '9')
2593 || *p
== '(' || *p
== ',' || *p
== ')'
2599 /* The aix4 compiler emits extra crud before the
2603 /* Skip over the type (?). */
2607 /* Skip over the colon. */
2611 /* We have found an enumerated type. */
2612 /* According to comments in read_enum_type
2613 a comma could end it instead of a semicolon.
2614 I don't know where that happens.
2616 while (*p
&& *p
!= ';' && *p
!= ',')
2620 /* Check for and handle cretinous dbx symbol name
2622 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2623 p
= next_symbol_text (objfile
);
2625 /* Point to the character after the name
2626 of the enum constant. */
2627 for (q
= p
; *q
&& *q
!= ':'; q
++)
2629 /* Note that the value doesn't matter for
2630 enum constants in psymtabs, just in symtabs. */
2631 pst
->add_psymbol (gdb::string_view (p
, q
- p
), true,
2632 VAR_DOMAIN
, LOC_CONST
, -1,
2633 psymbol_placement::STATIC
,
2634 0, psymtab_language
,
2635 partial_symtabs
, objfile
);
2636 /* Point past the name. */
2638 /* Skip over the value. */
2639 while (*p
&& *p
!= ',')
2641 /* Advance past the comma. */
2649 /* Constant, e.g. from "const" in Pascal. */
2650 pst
->add_psymbol (gdb::string_view (namestring
,
2652 true, VAR_DOMAIN
, LOC_CONST
, -1,
2653 psymbol_placement::STATIC
,
2654 0, psymtab_language
,
2655 partial_symtabs
, objfile
);
2661 std::string
name (namestring
, (p
- namestring
));
2662 function_outside_compilation_unit_complaint (name
.c_str ());
2664 pst
->add_psymbol (gdb::string_view (namestring
,
2666 true, VAR_DOMAIN
, LOC_BLOCK
,
2667 SECT_OFF_TEXT (objfile
),
2668 psymbol_placement::STATIC
,
2671 partial_symtabs
, objfile
);
2674 /* Global functions were ignored here, but now they
2675 are put into the global psymtab like one would expect.
2676 They're also in the minimal symbol table. */
2680 std::string
name (namestring
, (p
- namestring
));
2681 function_outside_compilation_unit_complaint (name
.c_str ());
2684 /* We need only the minimal symbols for these
2685 loader-generated definitions. Keeping the global
2686 symbols leads to "in psymbols but not in symbols"
2688 if (startswith (namestring
, "@FIX"))
2691 pst
->add_psymbol (gdb::string_view (namestring
,
2693 true, VAR_DOMAIN
, LOC_BLOCK
,
2694 SECT_OFF_TEXT (objfile
),
2695 psymbol_placement::GLOBAL
,
2698 partial_symtabs
, objfile
);
2701 /* Two things show up here (hopefully); static symbols of
2702 local scope (static used inside braces) or extensions
2703 of structure symbols. We can ignore both. */
2717 case '#': /* For symbol identification (used in
2722 /* It is a C++ nested symbol. We don't need to record it
2723 (I don't think); if we try to look up foo::bar::baz,
2724 then symbols for the symtab containing foo should get
2725 read in, I think. */
2726 /* Someone says sun cc puts out symbols like
2727 /foo/baz/maclib::/usr/local/bin/maclib,
2728 which would get here with a symbol type of ':'. */
2732 /* Unexpected symbol descriptor. The second and
2733 subsequent stabs of a continued stab can show up
2734 here. The question is whether they ever can mimic
2735 a normal stab--it would be nice if not, since we
2736 certainly don't want to spend the time searching to
2737 the end of every string looking for a
2740 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2742 /* Ignore it; perhaps it is an extension that we don't
2752 xcoff_end_psymtab (objfile
, partial_symtabs
,
2753 pst
, psymtab_include_list
, includes_used
,
2754 ssymnum
, dependency_list
,
2755 dependencies_used
, textlow_not_set
);
2758 /* Record the toc offset value of this symbol table into objfile
2759 structure. If no XMC_TC0 is found, toc_offset should be zero.
2760 Another place to obtain this information would be file auxiliary
2763 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2766 /* Return the toc offset value for a given objfile. */
2769 xcoff_get_toc_offset (struct objfile
*objfile
)
2772 return XCOFF_DATA (objfile
)->toc_offset
;
2776 /* Scan and build partial symbols for a symbol file.
2777 We have been initialized by a call to dbx_symfile_init, which
2778 put all the relevant info into a "struct dbx_symfile_info",
2779 hung off the objfile structure.
2781 SECTION_OFFSETS contains offsets relative to which the symbols in the
2782 various sections are (depending where the sections were actually
2786 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2790 int num_symbols
; /* # of symbols */
2791 file_ptr symtab_offset
; /* symbol table and */
2792 file_ptr stringtab_offset
; /* string table file offsets */
2793 struct xcoff_symfile_info
*info
;
2797 info
= XCOFF_DATA (objfile
);
2798 symfile_bfd
= abfd
= objfile
->obfd
;
2799 name
= objfile_name (objfile
);
2801 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2802 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2803 stringtab_offset
= symtab_offset
+
2804 num_symbols
* coff_data (abfd
)->local_symesz
;
2806 info
->min_lineno_offset
= 0;
2807 info
->max_lineno_offset
= 0;
2808 bfd_map_over_sections (abfd
, find_linenos
, info
);
2810 if (num_symbols
> 0)
2812 /* Read the string table. */
2813 init_stringtab (abfd
, stringtab_offset
, objfile
);
2815 /* Read the .debug section, if present and if we're not ignoring
2817 if (!(objfile
->flags
& OBJF_READNEVER
))
2819 struct bfd_section
*secp
;
2820 bfd_size_type length
;
2821 bfd_byte
*debugsec
= NULL
;
2823 secp
= bfd_get_section_by_name (abfd
, ".debug");
2826 length
= bfd_section_size (secp
);
2830 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2833 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2835 error (_("Error reading .debug section of `%s': %s"),
2836 name
, bfd_errmsg (bfd_get_error ()));
2840 info
->debugsec
= (char *) debugsec
;
2844 /* Read the symbols. We keep them in core because we will want to
2845 access them randomly in read_symbol*. */
2846 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2848 error (_("Error reading symbols from %s: %s"),
2849 name
, bfd_errmsg (bfd_get_error ()));
2850 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2851 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2852 info
->symtbl_num_syms
= num_symbols
;
2854 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2856 perror_with_name (_("reading symbol table"));
2858 scoped_free_pendings free_pending
;
2859 minimal_symbol_reader
reader (objfile
);
2861 /* Now that the symbol table data of the executable file are all in core,
2862 process them and define symbols accordingly. */
2864 psymbol_functions
*psf
= new psymbol_functions ();
2865 psymtab_storage
*partial_symtabs
= psf
->get_partial_symtabs ().get ();
2866 objfile
->qf
.emplace_front (psf
);
2867 scan_xcoff_symtab (reader
, partial_symtabs
, objfile
);
2869 /* Install any minimal symbols that have been collected as the current
2870 minimal symbols for this objfile. */
2874 /* DWARF2 sections. */
2876 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2877 dwarf2_initialize_objfile (objfile
);
2881 xcoff_symfile_offsets (struct objfile
*objfile
,
2882 const section_addr_info
&addrs
)
2884 const char *first_section_name
;
2886 default_symfile_offsets (objfile
, addrs
);
2888 /* Oneof the weird side-effects of default_symfile_offsets is that
2889 it sometimes sets some section indices to zero for sections that,
2890 in fact do not exist. See the body of default_symfile_offsets
2891 for more info on when that happens. Undo that, as this then allows
2892 us to test whether the associated section exists or not, and then
2893 access it quickly (without searching it again). */
2895 if (objfile
->section_offsets
.empty ())
2896 return; /* Is that even possible? Better safe than sorry. */
2898 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2900 if (objfile
->sect_index_text
== 0
2901 && strcmp (first_section_name
, ".text") != 0)
2902 objfile
->sect_index_text
= -1;
2904 if (objfile
->sect_index_data
== 0
2905 && strcmp (first_section_name
, ".data") != 0)
2906 objfile
->sect_index_data
= -1;
2908 if (objfile
->sect_index_bss
== 0
2909 && strcmp (first_section_name
, ".bss") != 0)
2910 objfile
->sect_index_bss
= -1;
2912 if (objfile
->sect_index_rodata
== 0
2913 && strcmp (first_section_name
, ".rodata") != 0)
2914 objfile
->sect_index_rodata
= -1;
2917 /* Register our ability to parse symbols for xcoff BFD files. */
2919 static const struct sym_fns xcoff_sym_fns
=
2922 /* It is possible that coff and xcoff should be merged as
2923 they do have fundamental similarities (for example, the extra storage
2924 classes used for stabs could presumably be recognized in any COFF file).
2925 However, in addition to obvious things like all the csect hair, there are
2926 some subtler differences between xcoffread.c and coffread.c, notably
2927 the fact that coffread.c has no need to read in all the symbols, but
2928 xcoffread.c reads all the symbols and does in fact randomly access them
2929 (in C_BSTAT and line number processing). */
2931 xcoff_new_init
, /* init anything gbl to entire symtab */
2932 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
2933 xcoff_initial_scan
, /* read a symbol file into symtab */
2934 xcoff_symfile_finish
, /* finished with file, cleanup */
2935 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
2936 default_symfile_segments
, /* Get segment information from a file. */
2937 aix_process_linenos
,
2938 default_symfile_relocate
, /* Relocate a debug section. */
2939 NULL
, /* sym_probe_fns */
2942 /* Same as xcoff_get_n_import_files, but for core files. */
2945 xcoff_get_core_n_import_files (bfd
*abfd
)
2947 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
2949 file_ptr offset
= 0;
2953 return -1; /* Not a core file. */
2955 for (offset
= 0; offset
< bfd_section_size (sect
);)
2961 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
2963 next
= bfd_get_32 (abfd
, buf
);
2965 break; /* This is the last entry. */
2969 /* Return the number of entries, excluding the first one, which is
2970 the path to the executable that produced this core file. */
2971 return n_entries
- 1;
2974 /* Return the number of import files (shared libraries) that the given
2975 BFD depends on. Return -1 if this number could not be computed. */
2978 xcoff_get_n_import_files (bfd
*abfd
)
2980 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
2984 /* If the ".loader" section does not exist, the objfile is probably
2985 not an executable. Might be a core file... */
2987 return xcoff_get_core_n_import_files (abfd
);
2989 /* The number of entries in the Import Files Table is stored in
2990 field l_nimpid. This field is always at offset 16, and is
2991 always 4 bytes long. Read those 4 bytes. */
2993 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
2995 l_nimpid
= bfd_get_32 (abfd
, buf
);
2997 /* By convention, the first entry is the default LIBPATH value
2998 to be used by the system loader, so it does not count towards
2999 the number of import files. */
3000 return l_nimpid
- 1;
3003 void _initialize_xcoffread ();
3005 _initialize_xcoffread ()
3007 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);