1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986-2023 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
.get (), 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
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. */
415 /* FIXME: I think all this stuff can be replaced by just passing
416 sort_linevec = 1 to end_compunit_symtab. */
419 arrange_linetable (std::vector
<linetable_entry
> &old_linetable
)
421 std::vector
<linetable_entry
> fentries
;
423 for (int ii
= 0; ii
< old_linetable
.size (); ++ii
)
425 if (old_linetable
[ii
].is_stmt
== 0)
428 if (old_linetable
[ii
].line
== 0)
430 /* Function entry found. */
431 fentries
.emplace_back ();
432 linetable_entry
&e
= fentries
.back ();
435 e
.pc
= old_linetable
[ii
].pc
;
439 if (fentries
.empty ())
442 std::sort (fentries
.begin (), fentries
.end ());
444 /* Allocate a new line table. */
445 std::vector
<linetable_entry
> new_linetable
;
446 new_linetable
.reserve (old_linetable
.size ());
448 /* If line table does not start with a function beginning, copy up until
450 for (int i
= 0; i
< old_linetable
.size () && old_linetable
[i
].line
!= 0; ++i
)
451 new_linetable
.push_back (old_linetable
[i
]);
453 /* Now copy function lines one by one. */
454 for (const linetable_entry
&entry
: fentries
)
456 /* If the function was compiled with XLC, we may have to add an
457 extra line to cover the function prologue. */
459 if (jj
+ 1 < old_linetable
.size ()
460 && old_linetable
[jj
].pc
!= old_linetable
[jj
+ 1].pc
)
462 new_linetable
.push_back (old_linetable
[jj
]);
463 new_linetable
.back ().line
= old_linetable
[jj
+ 1].line
;
466 for (jj
= entry
.line
+ 1;
467 jj
< old_linetable
.size () && old_linetable
[jj
].line
!= 0;
469 new_linetable
.push_back (old_linetable
[jj
]);
472 new_linetable
.shrink_to_fit ();
473 old_linetable
= std::move (new_linetable
);
476 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
477 following `IncludeChain'. At the end of each symtab (end_compunit_symtab),
478 we will determine if we should create additional symtab's to
479 represent if (the include files. */
482 typedef struct _inclTable
484 char *name
; /* include filename */
486 /* Offsets to the line table. end points to the last entry which is
487 part of this include file. */
490 struct subfile
*subfile
;
491 unsigned funStartLine
; /* Start line # of its function. */
495 #define INITIAL_INCLUDE_TABLE_LENGTH 20
496 static InclTable
*inclTable
; /* global include table */
497 static int inclIndx
; /* last entry to table */
498 static int inclLength
; /* table length */
499 static int inclDepth
; /* nested include depth */
501 static void allocate_include_entry (void);
504 record_include_begin (struct xcoff_symbol
*cs
)
508 /* In xcoff, we assume include files cannot be nested (not in .c files
509 of course, but in corresponding .s files.). */
511 /* This can happen with old versions of GCC.
512 GCC 2.3.3-930426 does not exhibit this on a test case which
513 a user said produced the message for him. */
514 complaint (_("Nested C_BINCL symbols"));
518 allocate_include_entry ();
520 inclTable
[inclIndx
].name
= cs
->c_name
;
521 inclTable
[inclIndx
].begin
= cs
->c_value
;
525 record_include_end (struct xcoff_symbol
*cs
)
531 complaint (_("Mismatched C_BINCL/C_EINCL pair"));
534 allocate_include_entry ();
536 pTbl
= &inclTable
[inclIndx
];
537 pTbl
->end
= cs
->c_value
;
544 allocate_include_entry (void)
546 if (inclTable
== NULL
)
548 inclTable
= XCNEWVEC (InclTable
, INITIAL_INCLUDE_TABLE_LENGTH
);
549 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
552 else if (inclIndx
>= inclLength
)
554 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
555 inclTable
= XRESIZEVEC (InclTable
, inclTable
, inclLength
);
556 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
557 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
561 /* Global variable to pass the psymtab down to all the routines involved
562 in psymtab to symtab processing. */
563 static legacy_psymtab
*this_symtab_psymtab
;
565 /* Objfile related to this_symtab_psymtab; set at the same time. */
566 static struct objfile
*this_symtab_objfile
;
568 /* given the start and end addresses of a compilation unit (or a csect,
569 at times) process its lines and create appropriate line vectors. */
572 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
576 = XCOFF_DATA (this_symtab_objfile
)->max_lineno_offset
;
578 /* subfile structure for the main compilation unit. */
579 struct subfile main_subfile
;
581 /* In the main source file, any time we see a function entry, we
582 reset this variable to function's absolute starting line number.
583 All the following line numbers in the function are relative to
584 this, and we record absolute line numbers in record_line(). */
586 unsigned int main_source_baseline
= 0;
591 ((struct xcoff_symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
593 goto return_after_cleanup
;
596 /* All source lines were in the main source file. None in include
599 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
600 &main_source_baseline
);
604 /* There was source with line numbers in include files. */
607 coff_data (this_symtab_objfile
->obfd
)->local_linesz
;
608 main_source_baseline
= 0;
610 for (int ii
= 0; ii
< inclIndx
; ++ii
)
612 /* If there is main file source before include file, enter it. */
613 if (offset
< inclTable
[ii
].begin
)
616 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
617 start
, 0, &main_source_baseline
);
620 if (strcmp (inclTable
[ii
].name
, get_last_source_file ()) == 0)
622 /* The entry in the include table refers to the main source
623 file. Add the lines to the main subfile. */
625 main_source_baseline
= inclTable
[ii
].funStartLine
;
627 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
628 start
, 0, &main_source_baseline
);
629 inclTable
[ii
].subfile
= &main_subfile
;
633 /* Have a new subfile for the include file. */
634 inclTable
[ii
].subfile
= new subfile
;
636 firstLine
= &(inclTable
[ii
].funStartLine
);
638 /* Enter include file's lines now. */
639 enter_line_range (inclTable
[ii
].subfile
, inclTable
[ii
].begin
,
640 inclTable
[ii
].end
, start
, 0, firstLine
);
643 if (offset
<= inclTable
[ii
].end
)
644 offset
= inclTable
[ii
].end
+ linesz
;
647 /* All the include files' line have been processed at this point. Now,
648 enter remaining lines of the main file, if any left. */
649 if (offset
< max_offset
+ 1 - linesz
)
651 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
652 &main_source_baseline
);
656 /* Process main file's line numbers. */
657 if (!main_subfile
.line_vector_entries
.empty ())
659 /* Line numbers are not necessarily ordered. xlc compilation will
660 put static function to the end. */
661 arrange_linetable (main_subfile
.line_vector_entries
);
664 /* Now, process included files' line numbers. */
666 for (int ii
= 0; ii
< inclIndx
; ++ii
)
668 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
669 && !inclTable
[ii
].subfile
->line_vector_entries
.empty ())
671 /* Line numbers are not necessarily ordered. xlc compilation will
672 put static function to the end. */
673 arrange_linetable (inclTable
[ii
].subfile
->line_vector_entries
);
677 /* For the same include file, we might want to have more than one
678 subfile. This happens if we have something like:
686 while foo.h including code in it. (stupid but possible)
687 Since start_subfile() looks at the name and uses an
688 existing one if finds, we need to provide a fake name and
692 start_subfile (inclTable
[ii
].name
);
695 /* Pick a fake name that will produce the same results as this
696 one when passed to deduce_language_from_filename. Kludge on
698 const char *fakename
= strrchr (inclTable
[ii
].name
, '.');
700 if (fakename
== NULL
)
702 start_subfile (fakename
);
704 struct subfile
*current_subfile
= get_current_subfile ();
705 current_subfile
->name
= inclTable
[ii
].name
;
706 current_subfile
->name_for_id
= inclTable
[ii
].name
;
709 start_subfile (pop_subfile ());
713 return_after_cleanup
:
715 /* We don't want to keep alloc/free'ing the global include file table. */
720 aix_process_linenos (struct objfile
*objfile
)
722 /* There is no linenos to read if there are only dwarf info. */
723 if (this_symtab_psymtab
== NULL
)
726 /* Process line numbers and enter them into line vector. */
727 process_linenos (get_last_source_start_addr (), cur_src_end_addr
);
731 /* Enter a given range of lines into the line vector.
732 can be called in the following two ways:
733 enter_line_range (subfile, beginoffset, endoffset,
734 startaddr, 0, firstLine) or
735 enter_line_range (subfile, beginoffset, 0,
736 startaddr, endaddr, firstLine)
738 endoffset points to the last line table entry that we should pay
742 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
743 unsigned endoffset
, /* offsets to line table */
744 CORE_ADDR startaddr
, /* offsets to line table */
745 CORE_ADDR endaddr
, unsigned *firstLine
)
747 struct objfile
*objfile
= this_symtab_objfile
;
748 struct gdbarch
*gdbarch
= objfile
->arch ();
749 unsigned int curoffset
;
752 struct internal_lineno int_lnno
;
753 unsigned int limit_offset
;
757 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
759 curoffset
= beginoffset
;
760 limit_offset
= XCOFF_DATA (objfile
)->max_lineno_offset
;
764 if (endoffset
>= limit_offset
)
766 complaint (_("Bad line table offset in C_EINCL directive"));
769 limit_offset
= endoffset
;
774 abfd
= objfile
->obfd
.get ();
775 linesz
= coff_data (abfd
)->local_linesz
;
776 ext_lnno
= alloca (linesz
);
778 while (curoffset
<= limit_offset
)
780 bfd_seek (abfd
, curoffset
, SEEK_SET
);
781 bfd_bread (ext_lnno
, linesz
, abfd
);
782 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
784 /* Find the address this line represents. */
785 addr
= (int_lnno
.l_lnno
786 ? int_lnno
.l_addr
.l_paddr
787 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
788 addr
+= objfile
->text_section_offset ();
790 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
793 if (int_lnno
.l_lnno
== 0)
795 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
796 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
800 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
801 gdbarch_addr_bits_remove (gdbarch
, addr
));
807 /* Save the vital information for use when closing off the current file.
808 NAME is the file name the symbols came from, START_ADDR is the first
809 text address for the file, and SIZE is the number of bytes of text. */
811 #define complete_symtab(name, start_addr) { \
812 set_last_source_file (name); \
813 set_last_source_start_addr (start_addr); \
817 /* Refill the symbol table input buffer
818 and set the variables that control fetching entries from it.
819 Reports an error if no data available.
820 This function can read past the end of the symbol table
821 (into the string table) but this does no harm. */
823 /* Create a new minimal symbol (using record_with_info).
825 Creation of all new minimal symbols should go through this function
826 rather than calling the various record functions in order
827 to make sure that all symbol addresses get properly relocated.
831 NAME - the symbol's name (but if NAME starts with a period, that
832 leading period is discarded).
833 ADDRESS - the symbol's address, prior to relocation. This function
834 relocates the address before recording the minimal symbol.
835 MS_TYPE - the symbol's type.
836 N_SCNUM - the symbol's XCOFF section number.
837 OBJFILE - the objfile associated with the minimal symbol. */
840 record_minimal_symbol (minimal_symbol_reader
&reader
,
841 const char *name
, CORE_ADDR address
,
842 enum minimal_symbol_type ms_type
,
844 struct objfile
*objfile
)
849 reader
.record_with_info (name
, address
, ms_type
,
850 secnum_to_section (n_scnum
, objfile
));
853 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
854 nested. At any given time, a symbol can only be in one static block.
855 This is the base address of current static block, zero if non exists. */
857 static int static_block_base
= 0;
859 /* Section number for the current static block. */
861 static int static_block_section
= -1;
863 /* true if space for symbol name has been allocated. */
865 static int symname_alloced
= 0;
867 /* Next symbol to read. Pointer into raw seething symbol table. */
869 static char *raw_symbol
;
871 /* This is the function which stabsread.c calls to get symbol
875 xcoff_next_symbol_text (struct objfile
*objfile
)
877 struct internal_syment symbol
;
880 /* FIXME: is this the same as the passed arg? */
881 if (this_symtab_objfile
)
882 objfile
= this_symtab_objfile
;
884 bfd_coff_swap_sym_in (objfile
->obfd
.get (), raw_symbol
, &symbol
);
887 complaint (_("Unexpected symbol continuation"));
889 /* Return something which points to '\0' and hope the symbol reading
890 code does something reasonable. */
893 else if (symbol
.n_sclass
& 0x80)
895 retval
= XCOFF_DATA (objfile
)->debugsec
+ symbol
.n_offset
;
896 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
901 complaint (_("Unexpected symbol continuation"));
903 /* Return something which points to '\0' and hope the symbol reading
904 code does something reasonable. */
910 /* Read symbols for a given partial symbol table. */
913 read_xcoff_symtab (struct objfile
*objfile
, legacy_psymtab
*pst
)
915 bfd
*abfd
= objfile
->obfd
.get ();
916 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
917 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
918 char *strtbl
= xcoff
->strtbl
;
919 char *debugsec
= xcoff
->debugsec
;
920 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
922 struct internal_syment symbol
[1];
923 union internal_auxent main_aux
;
924 struct xcoff_symbol cs
[1];
925 CORE_ADDR file_start_addr
= 0;
926 CORE_ADDR file_end_addr
= 0;
928 int next_file_symnum
= -1;
929 unsigned int max_symnum
;
930 int just_started
= 1;
932 CORE_ADDR fcn_start_addr
= 0;
933 enum language pst_symtab_language
;
935 struct xcoff_symbol fcn_stab_saved
= { 0 };
937 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
938 union internal_auxent fcn_aux_saved
{};
939 struct context_stack
*newobj
;
941 const char *filestring
= pst
->filename
; /* Name of the current file. */
943 const char *last_csect_name
; /* Last seen csect's name. */
945 this_symtab_psymtab
= pst
;
946 this_symtab_objfile
= objfile
;
948 /* Get the appropriate COFF "constants" related to the file we're
950 local_symesz
= coff_data (abfd
)->local_symesz
;
952 set_last_source_file (NULL
);
954 pst_symtab_language
= deduce_language_from_filename (filestring
);
957 start_compunit_symtab (objfile
, filestring
, NULL
, file_start_addr
,
958 pst_symtab_language
);
959 record_debugformat (debugfmt
);
960 symnum
= ((struct xcoff_symloc
*) pst
->read_symtab_private
)->first_symnum
;
962 symnum
+ ((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
;
963 first_object_file_end
= 0;
965 raw_symbol
= xcoff
->symtbl
+ symnum
* local_symesz
;
967 while (symnum
< max_symnum
)
969 QUIT
; /* make this command interruptable. */
971 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
972 /* read one symbol into `cs' structure. After processing the
973 whole symbol table, only string table will be kept in memory,
974 symbol table and debug section of xcoff will be freed. Thus
975 we can mark symbols with names in string table as
980 /* Swap and align the symbol into a reasonable C structure. */
981 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
983 cs
->c_symnum
= symnum
;
984 cs
->c_naux
= symbol
->n_numaux
;
985 if (symbol
->n_zeroes
)
988 /* We must use the original, unswapped, name here so the name field
989 pointed to by cs->c_name will persist throughout xcoffread. If
990 we use the new field, it gets overwritten for each symbol. */
991 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
992 /* If it's exactly E_SYMNMLEN characters long it isn't
994 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
998 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1000 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1001 p
[E_SYMNMLEN
] = '\0';
1003 symname_alloced
= 1;
1006 else if (symbol
->n_sclass
& 0x80)
1008 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1009 symname_alloced
= 0;
1013 /* in string table */
1014 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1015 symname_alloced
= 1;
1017 cs
->c_value
= symbol
->n_value
;
1018 cs
->c_sclass
= symbol
->n_sclass
;
1019 cs
->c_secnum
= symbol
->n_scnum
;
1020 cs
->c_type
= (unsigned) symbol
->n_type
;
1022 raw_symbol
+= local_symesz
;
1025 /* Save addr of first aux entry. */
1026 raw_auxptr
= raw_symbol
;
1028 /* Skip all the auxents associated with this symbol. */
1029 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1031 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1036 /* if symbol name starts with ".$" or "$", ignore it. */
1037 if (cs
->c_name
[0] == '$'
1038 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1041 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1043 if (get_last_source_file ())
1045 pst
->compunit_symtab
= end_compunit_symtab (cur_src_end_addr
);
1050 start_compunit_symtab (objfile
, "_globals_", NULL
,
1051 0, pst_symtab_language
);
1052 record_debugformat (debugfmt
);
1053 cur_src_end_addr
= first_object_file_end
;
1054 /* Done with all files, everything from here on is globals. */
1057 if (cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
||
1058 cs
->c_sclass
== C_WEAKEXT
)
1060 /* Dealing with a symbol with a csect entry. */
1062 #define CSECT(PP) ((PP)->x_csect)
1063 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1064 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1065 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1066 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1068 /* Convert the auxent to something we can access.
1069 XCOFF can have more than one auxiliary entries.
1071 Actual functions will have two auxiliary entries, one to have the
1072 function size and other to have the smtype/smclass (LD/PR).
1074 c_type value of main symbol table will be set only in case of
1075 C_EXT/C_HIDEEXT/C_WEAKEXT storage class symbols.
1076 Bit 10 of type is set if symbol is a function, ie the value is set
1077 to 32(0x20). So we need to read the first function auxiliary entry
1078 which contains the size. */
1079 if (cs
->c_naux
> 1 && ISFCN (cs
->c_type
))
1081 /* a function entry point. */
1083 fcn_start_addr
= cs
->c_value
;
1085 /* save the function header info, which will be used
1086 when `.bf' is seen. */
1089 /* Convert the auxent to something we can access. */
1090 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1091 0, cs
->c_naux
, &fcn_aux_saved
);
1094 /* Read the csect auxiliary header, which is always the last by
1096 bfd_coff_swap_aux_in (abfd
,
1098 + ((coff_data (abfd
)->local_symesz
)
1099 * (cs
->c_naux
- 1)),
1100 cs
->c_type
, cs
->c_sclass
,
1101 cs
->c_naux
- 1, cs
->c_naux
,
1104 switch (CSECT_SMTYP (&main_aux
))
1108 /* Ignore all external references. */
1112 /* A section description. */
1114 switch (CSECT_SCLAS (&main_aux
))
1120 /* A program csect is seen. We have to allocate one
1121 symbol table for each program csect. Normally gdb
1122 prefers one symtab for each source file. In case
1123 of AIX, one source file might include more than one
1124 [PR] csect, and they don't have to be adjacent in
1125 terms of the space they occupy in memory. Thus, one
1126 single source file might get fragmented in the
1127 memory and gdb's file start and end address
1128 approach does not work! GCC (and I think xlc) seem
1129 to put all the code in the unnamed program csect. */
1131 if (last_csect_name
)
1133 complete_symtab (filestring
, file_start_addr
);
1134 cur_src_end_addr
= file_end_addr
;
1135 end_compunit_symtab (file_end_addr
);
1138 /* Give all csects for this source file the same
1140 start_compunit_symtab (objfile
, filestring
, NULL
,
1141 0, pst_symtab_language
);
1142 record_debugformat (debugfmt
);
1145 /* If this is the very first csect seen,
1146 basically `__start'. */
1149 first_object_file_end
1150 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1155 cs
->c_value
+ objfile
->text_section_offset ();
1156 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1158 if (cs
->c_name
&& (cs
->c_name
[0] == '.' || cs
->c_name
[0] == '@'))
1159 last_csect_name
= cs
->c_name
;
1163 /* All other symbols are put into the minimal symbol
1176 /* Ignore the symbol. */
1184 switch (CSECT_SCLAS (&main_aux
))
1186 /* We never really come to this part as this case has been
1187 handled in ISFCN check above.
1188 This and other cases of XTY_LD are kept just for
1194 /* shared library function trampoline code entry point. */
1198 /* The symbols often have the same names as debug symbols for
1199 functions, and confuse lookup_symbol. */
1203 /* xlc puts each variable in a separate csect, so we get
1204 an XTY_SD for each variable. But gcc puts several
1205 variables in a csect, so that each variable only gets
1206 an XTY_LD. This will typically be XMC_RW; I suspect
1207 XMC_RO and XMC_BS might be possible too.
1208 These variables are put in the minimal symbol table
1215 /* Common symbols are put into the minimal symbol table only. */
1223 switch (cs
->c_sclass
)
1227 /* c_value field contains symnum of next .file entry in table
1228 or symnum of first global after last .file. */
1230 next_file_symnum
= cs
->c_value
;
1232 /* Complete symbol table for last object file containing
1233 debugging information. */
1235 /* Whether or not there was a csect in the previous file, we
1236 have to call `end_stabs' and `start_stabs' to reset
1237 type_vector, line_vector, etc. structures. */
1239 complete_symtab (filestring
, file_start_addr
);
1240 cur_src_end_addr
= file_end_addr
;
1241 end_compunit_symtab (file_end_addr
);
1244 /* XCOFF, according to the AIX 3.2 documentation, puts the
1245 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1246 do things the standard COFF way and put it in the auxent.
1247 We use the auxent if the symbol is ".file" and an auxent
1248 exists, otherwise use the symbol itself. Simple
1250 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1252 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1253 0, cs
->c_naux
, &main_aux
);
1254 filestring
= coff_getfilename (&main_aux
, objfile
);
1257 filestring
= cs
->c_name
;
1260 start_compunit_symtab (objfile
, filestring
, NULL
, 0,
1261 pst_symtab_language
);
1262 record_debugformat (debugfmt
);
1263 last_csect_name
= 0;
1265 /* reset file start and end addresses. A compilation unit
1266 with no text (only data) should have zero file
1268 file_start_addr
= file_end_addr
= 0;
1272 fcn_stab_saved
= *cs
;
1276 if (strcmp (cs
->c_name
, ".bf") == 0)
1278 CORE_ADDR off
= objfile
->text_section_offset ();
1280 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1281 0, cs
->c_naux
, &main_aux
);
1283 within_function
= 1;
1285 newobj
= push_context (0, fcn_start_addr
+ off
);
1287 newobj
->name
= define_symbol
1288 (fcn_cs_saved
.c_value
+ off
,
1289 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1290 if (newobj
->name
!= NULL
)
1291 newobj
->name
->set_section_index (SECT_OFF_TEXT (objfile
));
1293 else if (strcmp (cs
->c_name
, ".ef") == 0)
1295 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1296 0, cs
->c_naux
, &main_aux
);
1298 /* The value of .ef is the address of epilogue code;
1299 not useful for gdb. */
1300 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1301 contains number of lines to '}' */
1303 if (outermost_context_p ())
1304 { /* We attempted to pop an empty context stack. */
1305 ef_complaint (cs
->c_symnum
);
1306 within_function
= 0;
1309 struct context_stack cstk
= pop_context ();
1310 /* Stack must be empty now. */
1311 if (!outermost_context_p ())
1313 ef_complaint (cs
->c_symnum
);
1314 within_function
= 0;
1318 finish_block (cstk
.name
, cstk
.old_blocks
,
1319 NULL
, cstk
.start_addr
,
1320 (fcn_cs_saved
.c_value
1321 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1322 + objfile
->text_section_offset ()));
1323 within_function
= 0;
1328 /* Begin static block. */
1330 struct internal_syment static_symbol
;
1332 read_symbol (&static_symbol
, cs
->c_value
);
1333 static_block_base
= static_symbol
.n_value
;
1334 static_block_section
=
1335 secnum_to_section (static_symbol
.n_scnum
, objfile
);
1340 /* End of static block. */
1341 static_block_base
= 0;
1342 static_block_section
= -1;
1353 complaint (_("Unrecognized storage class %d."),
1368 /* beginning of include file */
1369 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1370 order. Thus, when wee see them, we might not know enough info
1371 to process them. Thus, we'll be saving them into a table
1372 (inclTable) and postpone their processing. */
1374 record_include_begin (cs
);
1378 /* End of include file. */
1379 /* See the comment after case C_BINCL. */
1380 record_include_end (cs
);
1384 if (strcmp (cs
->c_name
, ".bb") == 0)
1387 newobj
= push_context (depth
,
1389 + objfile
->text_section_offset ()));
1391 else if (strcmp (cs
->c_name
, ".eb") == 0)
1393 if (outermost_context_p ())
1394 { /* We attempted to pop an empty context stack. */
1395 eb_complaint (cs
->c_symnum
);
1398 struct context_stack cstk
= pop_context ();
1399 if (depth
-- != cstk
.depth
)
1401 eb_complaint (cs
->c_symnum
);
1404 if (*get_local_symbols () && !outermost_context_p ())
1406 /* Make a block for the local symbols within. */
1407 finish_block (cstk
.name
,
1408 cstk
.old_blocks
, NULL
,
1411 + objfile
->text_section_offset ()));
1413 *get_local_symbols () = cstk
.locals
;
1418 process_xcoff_symbol (cs
, objfile
);
1423 if (get_last_source_file ())
1425 struct compunit_symtab
*cust
;
1427 complete_symtab (filestring
, file_start_addr
);
1428 cur_src_end_addr
= file_end_addr
;
1429 cust
= end_compunit_symtab (file_end_addr
);
1430 /* When reading symbols for the last C_FILE of the objfile, try
1431 to make sure that we set pst->compunit_symtab to the symtab for the
1432 file, not to the _globals_ symtab. I'm not sure whether this
1433 actually works right or when/if it comes up. */
1434 if (pst
->compunit_symtab
== NULL
)
1435 pst
->compunit_symtab
= cust
;
1440 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1441 ((ALLOCED) ? (NAME) : obstack_strdup (&objfile->objfile_obstack, \
1445 /* process one xcoff symbol. */
1447 static struct symbol
*
1448 process_xcoff_symbol (struct xcoff_symbol
*cs
, struct objfile
*objfile
)
1450 struct symbol onesymbol
;
1451 struct symbol
*sym
= &onesymbol
;
1452 struct symbol
*sym2
= NULL
;
1458 if (cs
->c_secnum
< 0)
1460 /* The value is a register number, offset within a frame, etc.,
1461 and does not get relocated. */
1467 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1468 off
= objfile
->section_offsets
[sec
];
1475 /* default assumptions */
1476 sym
->set_value_address (cs
->c_value
+ off
);
1477 sym
->set_domain (VAR_DOMAIN
);
1478 sym
->set_section_index (secnum_to_section (cs
->c_secnum
, objfile
));
1480 if (ISFCN (cs
->c_type
))
1482 /* At this point, we don't know the type of the function. This
1483 will be patched with the type from its stab entry later on in
1484 patch_block_stabs (), unless the file was compiled without -g. */
1486 sym
->set_linkage_name (SYMNAME_ALLOC (name
, symname_alloced
));
1487 sym
->set_type (objfile_type (objfile
)->nodebug_text_symbol
);
1489 sym
->set_aclass_index (LOC_BLOCK
);
1490 sym2
= new (&objfile
->objfile_obstack
) symbol (*sym
);
1492 if (cs
->c_sclass
== C_EXT
|| C_WEAKEXT
)
1493 add_symbol_to_list (sym2
, get_global_symbols ());
1494 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1495 add_symbol_to_list (sym2
, get_file_symbols ());
1499 /* In case we can't figure out the type, provide default. */
1500 sym
->set_type (objfile_type (objfile
)->nodebug_data_symbol
);
1502 switch (cs
->c_sclass
)
1505 /* The values of functions and global symbols are now resolved
1506 via the global_sym_chain in stabsread.c. */
1508 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1509 add_stab_to_list (name
, &global_stabs
);
1511 add_stab_to_list (name
, &file_stabs
);
1515 add_stab_to_list (name
, &global_stabs
);
1520 common_block_start (cs
->c_name
, objfile
);
1524 common_block_end (objfile
);
1528 complaint (_("Unexpected storage class: %d"),
1541 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1544 sym
->set_section_index (sec
);
1551 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1552 all statics and we need to distinguish file-scope versus
1553 function-scope using within_function. We do this by
1554 changing the string we pass to define_symbol to use 'S'
1555 where we need to, which is not necessarily super-clean,
1556 but seems workable enough. */
1561 pp
= strchr (name
, ':');
1566 if (*pp
== 'V' && !within_function
)
1568 sym
= define_symbol ((cs
->c_value
1569 + objfile
->section_offsets
[static_block_section
]),
1570 cs
->c_name
, 0, 0, objfile
);
1573 sym
->set_value_address
1574 (sym
->value_address () + static_block_base
);
1575 sym
->set_section_index (static_block_section
);
1584 /* Extract the file name from the aux entry of a C_FILE symbol.
1585 Result is in static storage and is only good for temporary use. */
1588 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1590 static char buffer
[BUFSIZ
];
1592 if (aux_entry
->x_file
.x_n
.x_n
.x_zeroes
== 0)
1593 strcpy (buffer
, (XCOFF_DATA (objfile
)->strtbl
1594 + aux_entry
->x_file
.x_n
.x_n
.x_offset
));
1597 strncpy (buffer
, aux_entry
->x_file
.x_n
.x_fname
, FILNMLEN
);
1598 buffer
[FILNMLEN
] = '\0';
1603 /* Set *SYMBOL to symbol number symno in symtbl. */
1605 read_symbol (struct internal_syment
*symbol
, int symno
)
1607 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (this_symtab_objfile
);
1608 int nsyms
= xcoff
->symtbl_num_syms
;
1609 char *stbl
= xcoff
->symtbl
;
1611 if (symno
< 0 || symno
>= nsyms
)
1613 complaint (_("Invalid symbol offset"));
1614 symbol
->n_value
= 0;
1615 symbol
->n_scnum
= -1;
1618 bfd_coff_swap_sym_in (this_symtab_objfile
->obfd
.get (),
1619 stbl
+ (symno
* local_symesz
),
1623 /* Get value corresponding to symbol number symno in symtbl. */
1626 read_symbol_nvalue (int symno
)
1628 struct internal_syment symbol
[1];
1630 read_symbol (symbol
, symno
);
1631 return symbol
->n_value
;
1635 /* Find the address of the function corresponding to symno, where
1636 symno is the symbol pointed to by the linetable. */
1639 read_symbol_lineno (int symno
)
1641 struct objfile
*objfile
= this_symtab_objfile
;
1642 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1644 struct xcoff_symfile_info
*info
= XCOFF_DATA (objfile
);
1645 int nsyms
= info
->symtbl_num_syms
;
1646 char *stbl
= info
->symtbl
;
1647 char *strtbl
= info
->strtbl
;
1649 struct internal_syment symbol
[1];
1650 union internal_auxent main_aux
[1];
1654 bf_notfound_complaint ();
1658 /* Note that just searching for a short distance (e.g. 50 symbols)
1659 is not enough, at least in the following case.
1662 [many .stabx entries]
1663 [a few functions, referring to foo]
1667 What happens here is that the assembler moves the .stabx entries
1668 to right before the ".bf" for foo, but the symbol for "foo" is before
1669 all the stabx entries. See PR gdb/2222. */
1671 /* Maintaining a table of .bf entries might be preferable to this search.
1672 If I understand things correctly it would need to be done only for
1673 the duration of a single psymtab to symtab conversion. */
1674 while (symno
< nsyms
)
1676 bfd_coff_swap_sym_in (symfile_bfd
,
1677 stbl
+ (symno
* local_symesz
), symbol
);
1678 if (symbol
->n_sclass
== C_FCN
)
1680 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1682 if (strcmp (name
, ".bf") == 0)
1685 symno
+= symbol
->n_numaux
+ 1;
1688 bf_notfound_complaint ();
1692 /* Take aux entry and return its lineno. */
1694 bfd_coff_swap_aux_in (objfile
->obfd
.get (), stbl
+ symno
* local_symesz
,
1695 symbol
->n_type
, symbol
->n_sclass
,
1696 0, symbol
->n_numaux
, main_aux
);
1698 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1701 /* Support for line number handling. */
1703 /* This function is called for every section; it finds the outer limits
1704 * of the line table (minimum and maximum file offset) so that the
1705 * mainline code can read the whole thing for efficiency.
1708 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1710 struct xcoff_symfile_info
*info
;
1712 file_ptr offset
, maxoff
;
1714 count
= asect
->lineno_count
;
1716 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1719 size
= count
* coff_data (abfd
)->local_linesz
;
1720 info
= (struct xcoff_symfile_info
*) vpinfo
;
1721 offset
= asect
->line_filepos
;
1722 maxoff
= offset
+ size
;
1724 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1725 info
->min_lineno_offset
= offset
;
1727 if (maxoff
> info
->max_lineno_offset
)
1728 info
->max_lineno_offset
= maxoff
;
1732 xcoff_expand_psymtab (legacy_psymtab
*pst
, struct objfile
*objfile
)
1734 gdb_assert (!pst
->readin
);
1736 /* Read in all partial symtabs on which this one is dependent. */
1737 pst
->expand_dependencies (objfile
);
1739 if (((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1741 /* Init stuff necessary for reading in symbols. */
1744 scoped_free_pendings free_pending
;
1745 read_xcoff_symtab (objfile
, pst
);
1751 /* Read in all of the symbols for a given psymtab for real.
1752 Be verbose about it if the user wants that. SELF is not NULL. */
1755 xcoff_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
1757 gdb_assert (!self
->readin
);
1759 if (((struct xcoff_symloc
*) self
->read_symtab_private
)->numsyms
!= 0
1760 || self
->number_of_dependencies
)
1762 next_symbol_text_func
= xcoff_next_symbol_text
;
1764 self
->expand_psymtab (objfile
);
1766 /* Match with global symbols. This only needs to be done once,
1767 after all of the symtabs and dependencies have been read in. */
1768 scan_file_globals (objfile
);
1773 xcoff_new_init (struct objfile
*objfile
)
1775 stabsread_new_init ();
1778 /* Do initialization in preparation for reading symbols from OBJFILE.
1780 We will only be called if this is an XCOFF or XCOFF-like file.
1781 BFD handles figuring out the format of the file, and code in symfile.c
1782 uses BFD's determination to vector to us. */
1785 xcoff_symfile_init (struct objfile
*objfile
)
1787 /* Allocate struct to keep track of the symfile. */
1788 xcoff_objfile_data_key
.emplace (objfile
);
1791 /* Perform any local cleanups required when we are done with a particular
1792 objfile. I.E, we are in the process of discarding all symbol information
1793 for an objfile, freeing up all memory held for it, and unlinking the
1794 objfile struct from the global list of known objfiles. */
1797 xcoff_symfile_finish (struct objfile
*objfile
)
1799 /* Start with a fresh include table for the next objfile. */
1805 inclIndx
= inclLength
= inclDepth
= 0;
1810 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1814 unsigned char lengthbuf
[4];
1816 struct xcoff_symfile_info
*xcoff
= XCOFF_DATA (objfile
);
1818 xcoff
->strtbl
= NULL
;
1820 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1821 error (_("cannot seek to string table in %s: %s"),
1822 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1824 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1825 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1827 /* If no string table is needed, then the file may end immediately
1828 after the symbols. Just return with `strtbl' set to NULL. */
1830 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1833 /* Allocate string table from objfile_obstack. We will need this table
1834 as long as we have its symbol table around. */
1836 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1837 xcoff
->strtbl
= strtbl
;
1839 /* Copy length buffer, the first byte is usually zero and is
1840 used for stabs with a name length of zero. */
1841 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1842 if (length
== sizeof lengthbuf
)
1845 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1847 if (val
!= length
- sizeof lengthbuf
)
1848 error (_("cannot read string table from %s: %s"),
1849 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1850 if (strtbl
[length
- 1] != '\0')
1851 error (_("bad symbol file: string table "
1852 "does not end with null character"));
1857 /* If we have not yet seen a function for this psymtab, this is 0. If we
1858 have seen one, it is the offset in the line numbers of the line numbers
1860 static unsigned int first_fun_line_offset
;
1862 /* Allocate and partially fill a partial symtab. It will be
1863 completely filled at the end of the symbol list.
1865 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1866 is the address relative to which its symbols are (incremental) or 0
1869 static legacy_psymtab
*
1870 xcoff_start_psymtab (psymtab_storage
*partial_symtabs
,
1871 struct objfile
*objfile
,
1872 const char *filename
, int first_symnum
)
1874 /* We fill in textlow later. */
1875 legacy_psymtab
*result
= new legacy_psymtab (filename
, partial_symtabs
,
1876 objfile
->per_bfd
, 0);
1878 result
->read_symtab_private
=
1879 XOBNEW (&objfile
->objfile_obstack
, struct xcoff_symloc
);
1880 ((struct xcoff_symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1881 result
->legacy_read_symtab
= xcoff_read_symtab
;
1882 result
->legacy_expand_psymtab
= xcoff_expand_psymtab
;
1884 /* Deduce the source language from the filename for this psymtab. */
1885 psymtab_language
= deduce_language_from_filename (filename
);
1890 /* Close off the current usage of PST.
1891 Returns PST, or NULL if the partial symtab was empty and thrown away.
1893 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1895 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1896 are the information for includes and dependencies. */
1898 static legacy_psymtab
*
1899 xcoff_end_psymtab (struct objfile
*objfile
, psymtab_storage
*partial_symtabs
,
1900 legacy_psymtab
*pst
,
1901 const char **include_list
, int num_includes
,
1902 int capping_symbol_number
,
1903 legacy_psymtab
**dependency_list
,
1904 int number_dependencies
, int textlow_not_set
)
1908 if (capping_symbol_number
!= -1)
1909 ((struct xcoff_symloc
*) pst
->read_symtab_private
)->numsyms
=
1910 capping_symbol_number
1911 - ((struct xcoff_symloc
*) pst
->read_symtab_private
)->first_symnum
;
1912 ((struct xcoff_symloc
*) pst
->read_symtab_private
)->lineno_off
=
1913 first_fun_line_offset
;
1914 first_fun_line_offset
= 0;
1918 pst
->number_of_dependencies
= number_dependencies
;
1919 if (number_dependencies
)
1922 = partial_symtabs
->allocate_dependencies (number_dependencies
);
1923 memcpy (pst
->dependencies
, dependency_list
,
1924 number_dependencies
* sizeof (legacy_psymtab
*));
1927 pst
->dependencies
= 0;
1929 for (i
= 0; i
< num_includes
; i
++)
1931 legacy_psymtab
*subpst
=
1932 new legacy_psymtab (include_list
[i
], partial_symtabs
, objfile
->per_bfd
);
1934 subpst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, xcoff_symloc
);
1935 ((struct xcoff_symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
1936 ((struct xcoff_symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
1938 /* We could save slight bits of space by only making one of these,
1939 shared by the entire set of include files. FIXME-someday. */
1940 subpst
->dependencies
=
1941 partial_symtabs
->allocate_dependencies (1);
1942 subpst
->dependencies
[0] = pst
;
1943 subpst
->number_of_dependencies
= 1;
1945 subpst
->legacy_read_symtab
= pst
->legacy_read_symtab
;
1946 subpst
->legacy_expand_psymtab
= pst
->legacy_expand_psymtab
;
1949 if (num_includes
== 0
1950 && number_dependencies
== 0
1953 /* Throw away this psymtab, it's empty. */
1954 /* Empty psymtabs happen as a result of header files which don't have
1955 any symbols in them. There can be a lot of them. */
1957 partial_symtabs
->discard_psymtab (pst
);
1959 /* Indicate that psymtab was thrown away. */
1965 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
1966 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
1967 the symbol and its auxents. */
1970 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
1971 const char **name
, char **raw
, unsigned int *symnump
,
1972 struct objfile
*objfile
)
1974 bfd_coff_swap_sym_in (objfile
->obfd
.get (), *raw
, symbol
);
1975 if (symbol
->n_zeroes
)
1977 /* If it's exactly E_SYMNMLEN characters long it isn't
1979 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
1981 /* FIXME: wastes memory for symbols which we don't end up putting
1982 into the minimal symbols. */
1985 p
= (char *) obstack_alloc (&objfile
->objfile_obstack
,
1987 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
1988 p
[E_SYMNMLEN
] = '\0';
1992 /* Point to the unswapped name as that persists as long as the
1994 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
1996 else if (symbol
->n_sclass
& 0x80)
1998 *name
= XCOFF_DATA (objfile
)->debugsec
+ symbol
->n_offset
;
2002 *name
= XCOFF_DATA (objfile
)->strtbl
+ symbol
->n_offset
;
2005 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2006 if (symbol
->n_numaux
> 0)
2008 bfd_coff_swap_aux_in (objfile
->obfd
.get (), *raw
, symbol
->n_type
,
2009 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2011 *symnump
+= symbol
->n_numaux
;
2012 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2017 function_outside_compilation_unit_complaint (const char *arg1
)
2019 complaint (_("function `%s' appears to be defined "
2020 "outside of all compilation units"),
2025 scan_xcoff_symtab (minimal_symbol_reader
&reader
,
2026 psymtab_storage
*partial_symtabs
,
2027 struct objfile
*objfile
)
2029 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2030 const char *filestring
= NULL
;
2032 const char *namestring
;
2037 /* Current partial symtab */
2038 legacy_psymtab
*pst
;
2040 /* List of current psymtab's include files. */
2041 const char **psymtab_include_list
;
2042 int includes_allocated
;
2045 /* Index within current psymtab dependency list. */
2046 legacy_psymtab
**dependency_list
;
2047 int dependencies_used
, dependencies_allocated
;
2050 struct internal_syment symbol
;
2051 union internal_auxent main_aux
[5];
2052 unsigned int ssymnum
;
2054 const char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2055 CORE_ADDR last_csect_val
= 0;
2056 int last_csect_sec
= 0;
2057 int misc_func_recorded
= 0; /* true if any misc. function. */
2058 int textlow_not_set
= 1;
2060 pst
= (legacy_psymtab
*) 0;
2062 includes_allocated
= 30;
2064 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2065 sizeof (const char *));
2067 dependencies_allocated
= 30;
2068 dependencies_used
= 0;
2070 (legacy_psymtab
**) alloca (dependencies_allocated
*
2071 sizeof (legacy_psymtab
*));
2073 set_last_source_file (NULL
);
2075 abfd
= objfile
->obfd
.get ();
2076 next_symbol_text_func
= xcoff_next_symbol_text
;
2078 sraw_symbol
= XCOFF_DATA (objfile
)->symtbl
;
2079 nsyms
= XCOFF_DATA (objfile
)->symtbl_num_syms
;
2081 while (ssymnum
< nsyms
)
2087 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2088 sclass
= symbol
.n_sclass
;
2096 /* The CSECT auxent--always the last auxent. */
2097 union internal_auxent csect_aux
;
2098 unsigned int symnum_before
= ssymnum
;
2100 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2102 if (symbol
.n_numaux
> 1)
2104 bfd_coff_swap_aux_in
2105 (objfile
->obfd
.get (),
2106 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2109 symbol
.n_numaux
- 1,
2114 csect_aux
= main_aux
[0];
2116 /* If symbol name starts with ".$" or "$", ignore it. */
2117 if (namestring
[0] == '$'
2118 || (namestring
[0] == '.' && namestring
[1] == '$'))
2121 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2124 switch (csect_aux
.x_csect
.x_smclas
)
2127 if (last_csect_name
)
2129 /* If no misc. function recorded in the last
2130 seen csect, enter it as a function. This
2131 will take care of functions like strcmp()
2134 if (!misc_func_recorded
)
2136 record_minimal_symbol
2137 (reader
, last_csect_name
, last_csect_val
,
2138 mst_text
, last_csect_sec
, objfile
);
2139 misc_func_recorded
= 1;
2144 /* We have to allocate one psymtab for
2145 each program csect, because their text
2146 sections need not be adjacent. */
2148 (objfile
, partial_symtabs
, pst
, psymtab_include_list
,
2149 includes_used
, symnum_before
, dependency_list
,
2150 dependencies_used
, textlow_not_set
);
2152 dependencies_used
= 0;
2153 /* Give all psymtabs for this source file the same
2155 pst
= xcoff_start_psymtab
2156 (partial_symtabs
, objfile
,
2161 /* Activate the misc_func_recorded mechanism for
2162 compiler- and linker-generated CSECTs like ".strcmp"
2164 if (namestring
&& (namestring
[0] == '.'
2165 || namestring
[0] == '@'))
2167 last_csect_name
= namestring
;
2168 last_csect_val
= symbol
.n_value
;
2169 last_csect_sec
= symbol
.n_scnum
;
2174 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2176 if (highval
> pst
->raw_text_high ())
2177 pst
->set_text_high (highval
);
2178 if (!pst
->text_low_valid
2179 || symbol
.n_value
< pst
->raw_text_low ())
2180 pst
->set_text_low (symbol
.n_value
);
2182 misc_func_recorded
= 0;
2187 /* Data variables are recorded in the minimal symbol
2188 table, except for section symbols. */
2189 if (*namestring
!= '.')
2190 record_minimal_symbol
2191 (reader
, namestring
, symbol
.n_value
,
2192 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2193 symbol
.n_scnum
, objfile
);
2198 warning (_("More than one XMC_TC0 symbol found."));
2199 toc_offset
= symbol
.n_value
;
2201 /* Make TOC offset relative to start address of
2203 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2205 toc_offset
-= bfd_section_vma (bfd_sect
);
2209 /* These symbols tell us where the TOC entry for a
2210 variable is, not the variable itself. */
2219 switch (csect_aux
.x_csect
.x_smclas
)
2222 /* A function entry point. */
2224 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2225 first_fun_line_offset
=
2226 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2228 record_minimal_symbol
2229 (reader
, namestring
, symbol
.n_value
,
2230 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2231 symbol
.n_scnum
, objfile
);
2232 misc_func_recorded
= 1;
2236 /* shared library function trampoline code entry
2239 /* record trampoline code entries as
2240 mst_solib_trampoline symbol. When we lookup mst
2241 symbols, we will choose mst_text over
2242 mst_solib_trampoline. */
2243 record_minimal_symbol
2244 (reader
, namestring
, symbol
.n_value
,
2245 mst_solib_trampoline
, symbol
.n_scnum
, objfile
);
2246 misc_func_recorded
= 1;
2250 /* The symbols often have the same names as
2251 debug symbols for functions, and confuse
2257 /* xlc puts each variable in a separate csect,
2258 so we get an XTY_SD for each variable. But
2259 gcc puts several variables in a csect, so
2260 that each variable only gets an XTY_LD. We
2261 still need to record them. This will
2262 typically be XMC_RW; I suspect XMC_RO and
2263 XMC_BS might be possible too. */
2264 if (*namestring
!= '.')
2265 record_minimal_symbol
2266 (reader
, namestring
, symbol
.n_value
,
2267 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2268 symbol
.n_scnum
, objfile
);
2274 switch (csect_aux
.x_csect
.x_smclas
)
2278 /* Common variables are recorded in the minimal symbol
2279 table, except for section symbols. */
2280 if (*namestring
!= '.')
2281 record_minimal_symbol
2282 (reader
, namestring
, symbol
.n_value
,
2283 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2284 symbol
.n_scnum
, objfile
);
2296 unsigned int symnum_before
;
2298 symnum_before
= ssymnum
;
2299 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2302 /* See if the last csect needs to be recorded. */
2304 if (last_csect_name
&& !misc_func_recorded
)
2306 /* If no misc. function recorded in the last seen csect, enter
2307 it as a function. This will take care of functions like
2308 strcmp() compiled by xlc. */
2310 record_minimal_symbol (reader
, last_csect_name
, last_csect_val
,
2311 mst_text
, last_csect_sec
, objfile
);
2312 misc_func_recorded
= 1;
2317 xcoff_end_psymtab (objfile
, partial_symtabs
,
2318 pst
, psymtab_include_list
,
2319 includes_used
, symnum_before
,
2320 dependency_list
, dependencies_used
,
2323 dependencies_used
= 0;
2325 first_fun_line_offset
= 0;
2327 /* XCOFF, according to the AIX 3.2 documentation, puts the
2328 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2329 do things the standard COFF way and put it in the auxent.
2330 We use the auxent if the symbol is ".file" and an auxent
2331 exists, otherwise use the symbol itself. */
2332 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2334 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2337 filestring
= namestring
;
2339 pst
= xcoff_start_psymtab (partial_symtabs
, objfile
,
2342 last_csect_name
= NULL
;
2348 complaint (_("Storage class %d not recognized during scan"),
2354 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2355 to handle only the C_FUN and C_EXT. */
2369 /* C_EINCL means we are switching back to the main file. But there
2370 is no reason to care; the only thing we want to know about
2371 includes is the names of all the included (.h) files. */
2376 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2380 /* I don't think the name of the common block (as opposed to the
2381 variables within it) is something which is user visible
2389 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2390 so C_LSYM would appear to be only for locals. */
2396 /* We probably could save a few instructions by assuming that
2397 C_LSYM, C_PSYM, etc., never have auxents. */
2398 int naux1
= symbol
.n_numaux
+ 1;
2401 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2407 /* Mark down an include file in the current psymtab. */
2408 enum language tmp_language
;
2410 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2413 tmp_language
= deduce_language_from_filename (namestring
);
2415 /* Only change the psymtab's language if we've learned
2416 something useful (eg. tmp_language is not language_unknown).
2417 In addition, to match what start_subfile does, never change
2419 if (tmp_language
!= language_unknown
2420 && (tmp_language
!= language_c
2421 || psymtab_language
!= language_cplus
))
2422 psymtab_language
= tmp_language
;
2424 /* In C++, one may expect the same filename to come round many
2425 times, when code is coming alternately from the main file
2426 and from inline functions in other files. So I check to see
2427 if this is a file we've seen before -- either the main
2428 source file, or a previously included file.
2430 This seems to be a lot of time to be spending on N_SOL, but
2431 things like "break c-exp.y:435" need to work (I
2432 suppose the psymtab_include_list could be hashed or put
2433 in a binary tree, if profiling shows this is a major hog). */
2434 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2440 for (i
= 0; i
< includes_used
; i
++)
2441 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2449 psymtab_include_list
[includes_used
++] = namestring
;
2450 if (includes_used
>= includes_allocated
)
2452 const char **orig
= psymtab_include_list
;
2454 psymtab_include_list
= (const char **)
2455 alloca ((includes_allocated
*= 2) *
2456 sizeof (const char *));
2457 memcpy (psymtab_include_list
, orig
,
2458 includes_used
* sizeof (const char *));
2463 /* The value of the C_FUN is not the address of the function (it
2464 appears to be the address before linking), but as long as it
2465 is smaller than the actual address, then find_pc_partial_function
2466 will use the minimal symbols instead. I hope. */
2475 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2478 p
= strchr (namestring
, ':');
2480 continue; /* Not a debugging symbol. */
2482 /* Main processing section for debugging symbols which
2483 the initial read through the symbol tables needs to worry
2484 about. If we reach this point, the symbol which we are
2485 considering is definitely one we are interested in.
2486 p must also contain the (valid) index into the namestring
2487 which indicates the debugging type symbol. */
2492 pst
->add_psymbol (gdb::string_view (namestring
,
2494 true, VAR_DOMAIN
, LOC_STATIC
,
2495 SECT_OFF_DATA (objfile
),
2496 psymbol_placement::STATIC
,
2499 partial_symtabs
, objfile
);
2503 /* The addresses in these entries are reported to be
2504 wrong. See the code that reads 'G's for symtabs. */
2505 pst
->add_psymbol (gdb::string_view (namestring
,
2507 true, VAR_DOMAIN
, LOC_STATIC
,
2508 SECT_OFF_DATA (objfile
),
2509 psymbol_placement::GLOBAL
,
2512 partial_symtabs
, objfile
);
2516 /* When a 'T' entry is defining an anonymous enum, it
2517 may have a name which is the empty string, or a
2518 single space. Since they're not really defining a
2519 symbol, those shouldn't go in the partial symbol
2520 table. We do pick up the elements of such enums at
2521 'check_enum:', below. */
2522 if (p
>= namestring
+ 2
2523 || (p
== namestring
+ 1
2524 && namestring
[0] != ' '))
2526 pst
->add_psymbol (gdb::string_view (namestring
,
2528 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
2529 psymbol_placement::STATIC
,
2530 0, psymtab_language
,
2531 partial_symtabs
, objfile
);
2534 /* Also a typedef with the same name. */
2535 pst
->add_psymbol (gdb::string_view (namestring
,
2537 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2538 psymbol_placement::STATIC
,
2539 0, psymtab_language
,
2540 partial_symtabs
, objfile
);
2547 if (p
!= namestring
) /* a name is there, not just :T... */
2549 pst
->add_psymbol (gdb::string_view (namestring
,
2551 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
2552 psymbol_placement::STATIC
,
2553 0, psymtab_language
,
2554 partial_symtabs
, objfile
);
2557 /* If this is an enumerated type, we need to
2558 add all the enum constants to the partial symbol
2559 table. This does not cover enums without names, e.g.
2560 "enum {a, b} c;" in C, but fortunately those are
2561 rare. There is no way for GDB to find those from the
2562 enum type without spending too much time on it. Thus
2563 to solve this problem, the compiler needs to put out the
2564 enum in a nameless type. GCC2 does this. */
2566 /* We are looking for something of the form
2567 <name> ":" ("t" | "T") [<number> "="] "e"
2568 {<constant> ":" <value> ","} ";". */
2570 /* Skip over the colon and the 't' or 'T'. */
2572 /* This type may be given a number. Also, numbers can come
2573 in pairs like (0,26). Skip over it. */
2574 while ((*p
>= '0' && *p
<= '9')
2575 || *p
== '(' || *p
== ',' || *p
== ')'
2581 /* The aix4 compiler emits extra crud before the
2585 /* Skip over the type (?). */
2589 /* Skip over the colon. */
2593 /* We have found an enumerated type. */
2594 /* According to comments in read_enum_type
2595 a comma could end it instead of a semicolon.
2596 I don't know where that happens.
2598 while (*p
&& *p
!= ';' && *p
!= ',')
2602 /* Check for and handle cretinous dbx symbol name
2604 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2605 p
= next_symbol_text (objfile
);
2607 /* Point to the character after the name
2608 of the enum constant. */
2609 for (q
= p
; *q
&& *q
!= ':'; q
++)
2611 /* Note that the value doesn't matter for
2612 enum constants in psymtabs, just in symtabs. */
2613 pst
->add_psymbol (gdb::string_view (p
, q
- p
), true,
2614 VAR_DOMAIN
, LOC_CONST
, -1,
2615 psymbol_placement::STATIC
,
2616 0, psymtab_language
,
2617 partial_symtabs
, objfile
);
2618 /* Point past the name. */
2620 /* Skip over the value. */
2621 while (*p
&& *p
!= ',')
2623 /* Advance past the comma. */
2631 /* Constant, e.g. from "const" in Pascal. */
2632 pst
->add_psymbol (gdb::string_view (namestring
,
2634 true, VAR_DOMAIN
, LOC_CONST
, -1,
2635 psymbol_placement::STATIC
,
2636 0, psymtab_language
,
2637 partial_symtabs
, objfile
);
2643 std::string
name (namestring
, (p
- namestring
));
2644 function_outside_compilation_unit_complaint (name
.c_str ());
2646 pst
->add_psymbol (gdb::string_view (namestring
,
2648 true, VAR_DOMAIN
, LOC_BLOCK
,
2649 SECT_OFF_TEXT (objfile
),
2650 psymbol_placement::STATIC
,
2653 partial_symtabs
, objfile
);
2656 /* Global functions were ignored here, but now they
2657 are put into the global psymtab like one would expect.
2658 They're also in the minimal symbol table. */
2662 std::string
name (namestring
, (p
- namestring
));
2663 function_outside_compilation_unit_complaint (name
.c_str ());
2666 /* We need only the minimal symbols for these
2667 loader-generated definitions. Keeping the global
2668 symbols leads to "in psymbols but not in symbols"
2670 if (startswith (namestring
, "@FIX"))
2673 pst
->add_psymbol (gdb::string_view (namestring
,
2675 true, VAR_DOMAIN
, LOC_BLOCK
,
2676 SECT_OFF_TEXT (objfile
),
2677 psymbol_placement::GLOBAL
,
2680 partial_symtabs
, objfile
);
2683 /* Two things show up here (hopefully); static symbols of
2684 local scope (static used inside braces) or extensions
2685 of structure symbols. We can ignore both. */
2699 case '#': /* For symbol identification (used in
2704 /* It is a C++ nested symbol. We don't need to record it
2705 (I don't think); if we try to look up foo::bar::baz,
2706 then symbols for the symtab containing foo should get
2707 read in, I think. */
2708 /* Someone says sun cc puts out symbols like
2709 /foo/baz/maclib::/usr/local/bin/maclib,
2710 which would get here with a symbol type of ':'. */
2714 /* Unexpected symbol descriptor. The second and
2715 subsequent stabs of a continued stab can show up
2716 here. The question is whether they ever can mimic
2717 a normal stab--it would be nice if not, since we
2718 certainly don't want to spend the time searching to
2719 the end of every string looking for a
2722 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
2724 /* Ignore it; perhaps it is an extension that we don't
2734 xcoff_end_psymtab (objfile
, partial_symtabs
,
2735 pst
, psymtab_include_list
, includes_used
,
2736 ssymnum
, dependency_list
,
2737 dependencies_used
, textlow_not_set
);
2740 /* Record the toc offset value of this symbol table into objfile
2741 structure. If no XMC_TC0 is found, toc_offset should be zero.
2742 Another place to obtain this information would be file auxiliary
2745 XCOFF_DATA (objfile
)->toc_offset
= toc_offset
;
2748 /* Return the toc offset value for a given objfile. */
2751 xcoff_get_toc_offset (struct objfile
*objfile
)
2754 return XCOFF_DATA (objfile
)->toc_offset
;
2758 /* Scan and build partial symbols for a symbol file.
2759 We have been initialized by a call to dbx_symfile_init, which
2760 put all the relevant info into a "struct dbx_symfile_info",
2761 hung off the objfile structure.
2763 SECTION_OFFSETS contains offsets relative to which the symbols in the
2764 various sections are (depending where the sections were actually
2768 xcoff_initial_scan (struct objfile
*objfile
, symfile_add_flags symfile_flags
)
2772 int num_symbols
; /* # of symbols */
2773 file_ptr symtab_offset
; /* symbol table and */
2774 file_ptr stringtab_offset
; /* string table file offsets */
2775 struct xcoff_symfile_info
*info
;
2779 info
= XCOFF_DATA (objfile
);
2780 symfile_bfd
= abfd
= objfile
->obfd
.get ();
2781 name
= objfile_name (objfile
);
2783 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2784 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2785 stringtab_offset
= symtab_offset
+
2786 num_symbols
* coff_data (abfd
)->local_symesz
;
2788 info
->min_lineno_offset
= 0;
2789 info
->max_lineno_offset
= 0;
2790 bfd_map_over_sections (abfd
, find_linenos
, info
);
2792 if (num_symbols
> 0)
2794 /* Read the string table. */
2795 init_stringtab (abfd
, stringtab_offset
, objfile
);
2797 /* Read the .debug section, if present and if we're not ignoring
2799 if (!(objfile
->flags
& OBJF_READNEVER
))
2801 struct bfd_section
*secp
;
2802 bfd_size_type length
;
2803 bfd_byte
*debugsec
= NULL
;
2805 secp
= bfd_get_section_by_name (abfd
, ".debug");
2808 length
= bfd_section_size (secp
);
2812 = (bfd_byte
*) obstack_alloc (&objfile
->objfile_obstack
,
2815 if (!bfd_get_full_section_contents (abfd
, secp
, &debugsec
))
2817 error (_("Error reading .debug section of `%s': %s"),
2818 name
, bfd_errmsg (bfd_get_error ()));
2822 info
->debugsec
= (char *) debugsec
;
2826 /* Read the symbols. We keep them in core because we will want to
2827 access them randomly in read_symbol*. */
2828 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2830 error (_("Error reading symbols from %s: %s"),
2831 name
, bfd_errmsg (bfd_get_error ()));
2832 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2833 info
->symtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, size
);
2834 info
->symtbl_num_syms
= num_symbols
;
2836 val
= bfd_bread (info
->symtbl
, size
, abfd
);
2838 perror_with_name (_("reading symbol table"));
2840 scoped_free_pendings free_pending
;
2841 minimal_symbol_reader
reader (objfile
);
2843 /* Now that the symbol table data of the executable file are all in core,
2844 process them and define symbols accordingly. */
2846 psymbol_functions
*psf
= new psymbol_functions ();
2847 psymtab_storage
*partial_symtabs
= psf
->get_partial_symtabs ().get ();
2848 objfile
->qf
.emplace_front (psf
);
2849 scan_xcoff_symtab (reader
, partial_symtabs
, objfile
);
2851 /* Install any minimal symbols that have been collected as the current
2852 minimal symbols for this objfile. */
2856 /* DWARF2 sections. */
2858 if (dwarf2_has_info (objfile
, &dwarf2_xcoff_names
))
2859 dwarf2_initialize_objfile (objfile
);
2863 xcoff_symfile_offsets (struct objfile
*objfile
,
2864 const section_addr_info
&addrs
)
2866 const char *first_section_name
;
2868 default_symfile_offsets (objfile
, addrs
);
2870 /* Oneof the weird side-effects of default_symfile_offsets is that
2871 it sometimes sets some section indices to zero for sections that,
2872 in fact do not exist. See the body of default_symfile_offsets
2873 for more info on when that happens. Undo that, as this then allows
2874 us to test whether the associated section exists or not, and then
2875 access it quickly (without searching it again). */
2877 if (objfile
->section_offsets
.empty ())
2878 return; /* Is that even possible? Better safe than sorry. */
2880 first_section_name
= bfd_section_name (objfile
->sections
[0].the_bfd_section
);
2882 if (objfile
->sect_index_text
== 0
2883 && strcmp (first_section_name
, ".text") != 0)
2884 objfile
->sect_index_text
= -1;
2886 if (objfile
->sect_index_data
== 0
2887 && strcmp (first_section_name
, ".data") != 0)
2888 objfile
->sect_index_data
= -1;
2890 if (objfile
->sect_index_bss
== 0
2891 && strcmp (first_section_name
, ".bss") != 0)
2892 objfile
->sect_index_bss
= -1;
2894 if (objfile
->sect_index_rodata
== 0
2895 && strcmp (first_section_name
, ".rodata") != 0)
2896 objfile
->sect_index_rodata
= -1;
2899 /* Register our ability to parse symbols for xcoff BFD files. */
2901 static const struct sym_fns xcoff_sym_fns
=
2904 /* It is possible that coff and xcoff should be merged as
2905 they do have fundamental similarities (for example, the extra storage
2906 classes used for stabs could presumably be recognized in any COFF file).
2907 However, in addition to obvious things like all the csect hair, there are
2908 some subtler differences between xcoffread.c and coffread.c, notably
2909 the fact that coffread.c has no need to read in all the symbols, but
2910 xcoffread.c reads all the symbols and does in fact randomly access them
2911 (in C_BSTAT and line number processing). */
2913 xcoff_new_init
, /* init anything gbl to entire symtab */
2914 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
2915 xcoff_initial_scan
, /* read a symbol file into symtab */
2916 xcoff_symfile_finish
, /* finished with file, cleanup */
2917 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
2918 default_symfile_segments
, /* Get segment information from a file. */
2919 aix_process_linenos
,
2920 default_symfile_relocate
, /* Relocate a debug section. */
2921 NULL
, /* sym_probe_fns */
2924 /* Same as xcoff_get_n_import_files, but for core files. */
2927 xcoff_get_core_n_import_files (bfd
*abfd
)
2929 asection
*sect
= bfd_get_section_by_name (abfd
, ".ldinfo");
2931 file_ptr offset
= 0;
2935 return -1; /* Not a core file. */
2937 for (offset
= 0; offset
< bfd_section_size (sect
);)
2943 if (!bfd_get_section_contents (abfd
, sect
, buf
, offset
, 4))
2945 next
= bfd_get_32 (abfd
, buf
);
2947 break; /* This is the last entry. */
2951 /* Return the number of entries, excluding the first one, which is
2952 the path to the executable that produced this core file. */
2953 return n_entries
- 1;
2956 /* Return the number of import files (shared libraries) that the given
2957 BFD depends on. Return -1 if this number could not be computed. */
2960 xcoff_get_n_import_files (bfd
*abfd
)
2962 asection
*sect
= bfd_get_section_by_name (abfd
, ".loader");
2966 /* If the ".loader" section does not exist, the objfile is probably
2967 not an executable. Might be a core file... */
2969 return xcoff_get_core_n_import_files (abfd
);
2971 /* The number of entries in the Import Files Table is stored in
2972 field l_nimpid. This field is always at offset 16, and is
2973 always 4 bytes long. Read those 4 bytes. */
2975 if (!bfd_get_section_contents (abfd
, sect
, buf
, 16, 4))
2977 l_nimpid
= bfd_get_32 (abfd
, buf
);
2979 /* By convention, the first entry is the default LIBPATH value
2980 to be used by the system loader, so it does not count towards
2981 the number of import files. */
2982 return l_nimpid
- 1;
2985 void _initialize_xcoffread ();
2987 _initialize_xcoffread ()
2989 add_symtab_fns (bfd_target_xcoff_flavour
, &xcoff_sym_fns
);