1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007, 2008, 2009,
4 2010, 2011 Free Software Foundation, Inc.
5 Derived from coffread.c, dbxread.c, and a lot of hacking.
6 Contributed by IBM Corporation.
8 This file is part of GDB.
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include <sys/types.h>
29 #include "gdb_string.h"
31 #include <sys/param.h>
32 #ifdef HAVE_SYS_FILE_H
37 #include "coff/internal.h"
38 #include "libcoff.h" /* FIXME, internal data from BFD */
39 #include "coff/xcoff.h"
41 #include "coff/rs6000.h"
42 #include "xcoffread.h"
46 /* FIXME: ezannoni/2004-02-13 Verify if the include below is really needed. */
50 #include "stabsread.h"
51 #include "expression.h"
52 #include "complaints.h"
55 #include "gdb-stabs.h"
57 /* For interface with stabsread.c. */
58 #include "aout/stab_gnu.h"
61 /* We put a pointer to this structure in the read_symtab_private field
67 /* First symbol number for this file. */
71 /* Number of symbols in the section of the symbol table devoted to
72 this file's symbols (actually, the section bracketed may contain
73 more than just this file's symbols). If numsyms is 0, the only
74 reason for this thing's existence is the dependency list. Nothing
75 else will happen when it is read in. */
79 /* Position of the start of the line number information for this
81 unsigned int lineno_off
;
84 /* Remember what we deduced to be the source language of this psymtab. */
86 static enum language psymtab_language
= language_unknown
;
89 /* Simplified internal version of coff symbol table information. */
94 int c_symnum
; /* Symbol number of this entry. */
95 int c_naux
; /* 0 if syment only, 1 if syment + auxent. */
97 unsigned char c_sclass
;
102 /* Last function's saved coff symbol `cs'. */
104 static struct coff_symbol fcn_cs_saved
;
106 static bfd
*symfile_bfd
;
108 /* Core address of start and end of text of current source file.
109 This is calculated from the first function seen after a C_FILE
113 static CORE_ADDR cur_src_end_addr
;
115 /* Core address of the end of the first object file. */
117 static CORE_ADDR first_object_file_end
;
119 /* Initial symbol-table-debug-string vector length. */
121 #define INITIAL_STABVECTOR_LENGTH 40
123 /* Nonzero if within a function (so symbols should be local,
124 if nothing says specifically). */
128 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
129 there is any reason not to just use a #define, but might as well
130 ask BFD for the size and store it here, I guess. */
132 static unsigned local_symesz
;
134 struct coff_symfile_info
136 file_ptr min_lineno_offset
; /* Where in file lowest line#s are. */
137 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file. */
139 /* Pointer to the string table. */
142 /* Pointer to debug section. */
145 /* Pointer to the a.out symbol table. */
148 /* Number of symbols in symtbl. */
151 /* Offset in data section to TOC anchor. */
152 CORE_ADDR toc_offset
;
156 bf_notfound_complaint (void)
158 complaint (&symfile_complaints
,
159 _("line numbers off, `.bf' symbol not found"));
163 ef_complaint (int arg1
)
165 complaint (&symfile_complaints
,
166 _("Mismatched .ef symbol ignored starting at symnum %d"), arg1
);
170 eb_complaint (int arg1
)
172 complaint (&symfile_complaints
,
173 _("Mismatched .eb symbol ignored starting at symnum %d"), arg1
);
176 static void xcoff_initial_scan (struct objfile
*, int);
178 static void scan_xcoff_symtab (struct objfile
*);
180 static char *xcoff_next_symbol_text (struct objfile
*);
182 static void record_include_begin (struct coff_symbol
*);
185 enter_line_range (struct subfile
*, unsigned, unsigned,
186 CORE_ADDR
, CORE_ADDR
, unsigned *);
188 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
190 static void xcoff_symfile_init (struct objfile
*);
192 static void xcoff_new_init (struct objfile
*);
194 static void xcoff_symfile_finish (struct objfile
*);
196 static void xcoff_symfile_offsets (struct objfile
*,
197 struct section_addr_info
*addrs
);
199 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
201 static void read_symbol (struct internal_syment
*, int);
203 static int read_symbol_lineno (int);
205 static CORE_ADDR
read_symbol_nvalue (int);
207 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
210 static void read_xcoff_symtab (struct partial_symtab
*);
213 static void add_stab_to_list (char *, struct pending_stabs
**);
216 static int compare_lte (const void *, const void *);
218 static struct linetable
*arrange_linetable (struct linetable
*);
220 static void record_include_end (struct coff_symbol
*);
222 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
225 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
227 static int secnum_to_section (int, struct objfile
*);
228 static asection
*secnum_to_bfd_section (int, struct objfile
*);
230 struct find_targ_sec_arg
235 struct objfile
*objfile
;
238 static void find_targ_sec (bfd
*, asection
*, void *);
241 find_targ_sec (bfd
*abfd
, asection
*sect
, void *obj
)
243 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
244 struct objfile
*objfile
= args
->objfile
;
246 if (sect
->target_index
== args
->targ_index
)
248 /* This is the section. Figure out what SECT_OFF_* code it is. */
249 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
250 *args
->resultp
= SECT_OFF_TEXT (objfile
);
251 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
252 *args
->resultp
= SECT_OFF_DATA (objfile
);
254 *args
->resultp
= sect
->index
;
255 *args
->bfd_sect
= sect
;
259 /* Return the section number (SECT_OFF_*) that CS points to. */
261 secnum_to_section (int secnum
, struct objfile
*objfile
)
263 int off
= SECT_OFF_TEXT (objfile
);
265 asection
*sect
= NULL
;
266 struct find_targ_sec_arg args
;
267 args
.targ_index
= secnum
;
269 args
.bfd_sect
= §
;
270 args
.objfile
= objfile
;
271 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
275 /* Return the BFD section that CS points to. */
277 secnum_to_bfd_section (int secnum
, struct objfile
*objfile
)
279 int off
= SECT_OFF_TEXT (objfile
);
281 asection
*sect
= NULL
;
282 struct find_targ_sec_arg args
;
283 args
.targ_index
= secnum
;
285 args
.bfd_sect
= §
;
286 args
.objfile
= objfile
;
287 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
291 /* add a given stab string into given stab vector. */
296 add_stab_to_list (char *stabname
, struct pending_stabs
**stabvector
)
298 if (*stabvector
== NULL
)
300 *stabvector
= (struct pending_stabs
*)
301 xmalloc (sizeof (struct pending_stabs
) +
302 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
303 (*stabvector
)->count
= 0;
304 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
306 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
308 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
309 *stabvector
= (struct pending_stabs
*)
310 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
311 (*stabvector
)->length
* sizeof (char *));
313 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
318 /* Linenos are processed on a file-by-file basis.
322 1) xlc (IBM's native c compiler) postpones static function code
323 emission to the end of a compilation unit. This way it can
324 determine if those functions (statics) are needed or not, and
325 can do some garbage collection (I think). This makes line
326 numbers and corresponding addresses unordered, and we end up
327 with a line table like:
344 and that breaks gdb's binary search on line numbers, if the
345 above table is not sorted on line numbers. And that sort
346 should be on function based, since gcc can emit line numbers
349 10 0x100 - for the init/test part of a for stmt.
352 10 0x400 - for the increment part of a for stmt.
354 arrange_linetable() will do this sorting.
356 2) aix symbol table might look like:
358 c_file // beginning of a new file
359 .bi // beginning of include file
360 .ei // end of include file
364 basically, .bi/.ei pairs do not necessarily encapsulate
365 their scope. They need to be recorded, and processed later
366 on when we come the end of the compilation unit.
367 Include table (inclTable) and process_linenos() handle
373 /* compare line table entry addresses. */
376 compare_lte (const void *lte1p
, const void *lte2p
)
378 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
379 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
381 return lte1
->pc
- lte2
->pc
;
384 /* Given a line table with function entries are marked, arrange its
385 functions in ascending order and strip off function entry markers
386 and return it in a newly created table. If the old one is good
387 enough, return the old one. */
388 /* FIXME: I think all this stuff can be replaced by just passing
389 sort_linevec = 1 to end_symtab. */
391 static struct linetable
*
392 arrange_linetable (struct linetable
*oldLineTb
)
394 int ii
, jj
, newline
, /* new line count */
395 function_count
; /* # of functions */
397 struct linetable_entry
*fentry
; /* function entry vector */
398 int fentry_size
; /* # of function entries */
399 struct linetable
*newLineTb
; /* new line table */
401 #define NUM_OF_FUNCTIONS 20
403 fentry_size
= NUM_OF_FUNCTIONS
;
404 fentry
= (struct linetable_entry
*)
405 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
407 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
409 if (oldLineTb
->item
[ii
].line
== 0)
410 { /* Function entry found. */
411 if (function_count
>= fentry_size
)
412 { /* Make sure you have room. */
414 fentry
= (struct linetable_entry
*)
416 fentry_size
* sizeof (struct linetable_entry
));
418 fentry
[function_count
].line
= ii
;
419 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
424 if (function_count
== 0)
429 else if (function_count
> 1)
430 qsort (fentry
, function_count
,
431 sizeof (struct linetable_entry
), compare_lte
);
433 /* Allocate a new line table. */
434 newLineTb
= (struct linetable
*)
436 (sizeof (struct linetable
) +
437 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
439 /* If line table does not start with a function beginning, copy up until
443 if (oldLineTb
->item
[0].line
!= 0)
445 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
446 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
448 /* Now copy function lines one by one. */
450 for (ii
= 0; ii
< function_count
; ++ii
)
452 for (jj
= fentry
[ii
].line
+ 1;
453 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
455 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
458 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
462 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
463 following `IncludeChain'. At the end of each symtab (end_symtab),
464 we will determine if we should create additional symtab's to
465 represent if (the include files. */
468 typedef struct _inclTable
470 char *name
; /* include filename */
472 /* Offsets to the line table. end points to the last entry which is
473 part of this include file. */
476 struct subfile
*subfile
;
477 unsigned funStartLine
; /* Start line # of its function. */
481 #define INITIAL_INCLUDE_TABLE_LENGTH 20
482 static InclTable
*inclTable
; /* global include table */
483 static int inclIndx
; /* last entry to table */
484 static int inclLength
; /* table length */
485 static int inclDepth
; /* nested include depth */
487 static void allocate_include_entry (void);
490 record_include_begin (struct coff_symbol
*cs
)
494 /* In xcoff, we assume include files cannot be nested (not in .c files
495 of course, but in corresponding .s files.). */
497 /* This can happen with old versions of GCC.
498 GCC 2.3.3-930426 does not exhibit this on a test case which
499 a user said produced the message for him. */
500 complaint (&symfile_complaints
, _("Nested C_BINCL symbols"));
504 allocate_include_entry ();
506 inclTable
[inclIndx
].name
= cs
->c_name
;
507 inclTable
[inclIndx
].begin
= cs
->c_value
;
511 record_include_end (struct coff_symbol
*cs
)
517 complaint (&symfile_complaints
, _("Mismatched C_BINCL/C_EINCL pair"));
520 allocate_include_entry ();
522 pTbl
= &inclTable
[inclIndx
];
523 pTbl
->end
= cs
->c_value
;
530 allocate_include_entry (void)
532 if (inclTable
== NULL
)
534 inclTable
= (InclTable
*)
535 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
537 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
538 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
541 else if (inclIndx
>= inclLength
)
543 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
544 inclTable
= (InclTable
*)
545 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
546 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
547 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
551 /* Global variable to pass the psymtab down to all the routines involved
552 in psymtab to symtab processing. */
553 static struct partial_symtab
*this_symtab_psymtab
;
555 /* given the start and end addresses of a compilation unit (or a csect,
556 at times) process its lines and create appropriate line vectors. */
559 process_linenos (CORE_ADDR start
, CORE_ADDR end
)
562 file_ptr max_offset
=
563 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
564 ->deprecated_sym_private
)->max_lineno_offset
;
566 /* subfile structure for the main compilation unit. */
567 struct subfile main_subfile
;
569 /* In the main source file, any time we see a function entry, we
570 reset this variable to function's absolute starting line number.
571 All the following line numbers in the function are relative to
572 this, and we record absolute line numbers in record_line(). */
574 unsigned int main_source_baseline
= 0;
579 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
581 goto return_after_cleanup
;
583 memset (&main_subfile
, '\0', sizeof (main_subfile
));
586 /* All source lines were in the main source file. None in include
589 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
590 &main_source_baseline
);
594 /* There was source with line numbers in include files. */
597 coff_data (this_symtab_psymtab
->objfile
->obfd
)->local_linesz
;
598 main_source_baseline
= 0;
600 for (ii
= 0; ii
< inclIndx
; ++ii
)
602 struct subfile
*tmpSubfile
;
604 /* If there is main file source before include file, enter it. */
605 if (offset
< inclTable
[ii
].begin
)
608 (&main_subfile
, offset
, inclTable
[ii
].begin
- linesz
,
609 start
, 0, &main_source_baseline
);
612 if (strcmp (inclTable
[ii
].name
, last_source_file
) == 0)
614 /* The entry in the include table refers to the main source
615 file. Add the lines to the main subfile. */
617 main_source_baseline
= inclTable
[ii
].funStartLine
;
619 (&main_subfile
, inclTable
[ii
].begin
, inclTable
[ii
].end
,
620 start
, 0, &main_source_baseline
);
621 inclTable
[ii
].subfile
= &main_subfile
;
625 /* Have a new subfile for the include file. */
627 tmpSubfile
= inclTable
[ii
].subfile
=
628 (struct subfile
*) xmalloc (sizeof (struct subfile
));
630 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
631 firstLine
= &(inclTable
[ii
].funStartLine
);
633 /* Enter include file's lines now. */
634 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
635 inclTable
[ii
].end
, start
, 0, firstLine
);
638 if (offset
<= inclTable
[ii
].end
)
639 offset
= inclTable
[ii
].end
+ linesz
;
642 /* All the include files' line have been processed at this point. Now,
643 enter remaining lines of the main file, if any left. */
644 if (offset
< max_offset
+ 1 - linesz
)
646 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
647 &main_source_baseline
);
651 /* Process main file's line numbers. */
652 if (main_subfile
.line_vector
)
654 struct linetable
*lineTb
, *lv
;
656 lv
= main_subfile
.line_vector
;
658 /* Line numbers are not necessarily ordered. xlc compilation will
659 put static function to the end. */
661 lineTb
= arrange_linetable (lv
);
664 current_subfile
->line_vector
= (struct linetable
*)
665 xrealloc (lv
, (sizeof (struct linetable
)
666 + lv
->nitems
* sizeof (struct linetable_entry
)));
671 current_subfile
->line_vector
= lineTb
;
674 current_subfile
->line_vector_length
=
675 current_subfile
->line_vector
->nitems
;
678 /* Now, process included files' line numbers. */
680 for (ii
= 0; ii
< inclIndx
; ++ii
)
682 if (inclTable
[ii
].subfile
!= ((struct subfile
*) &main_subfile
)
683 && (inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!!
686 struct linetable
*lineTb
, *lv
;
688 lv
= (inclTable
[ii
].subfile
)->line_vector
;
690 /* Line numbers are not necessarily ordered. xlc compilation will
691 put static function to the end. */
693 lineTb
= arrange_linetable (lv
);
697 /* For the same include file, we might want to have more than one
698 subfile. This happens if we have something like:
706 while foo.h including code in it. (stupid but possible)
707 Since start_subfile() looks at the name and uses an
708 existing one if finds, we need to provide a fake name and
712 start_subfile (inclTable
[ii
].name
, (char *) 0);
715 /* Pick a fake name that will produce the same results as this
716 one when passed to deduce_language_from_filename. Kludge on
718 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
720 if (fakename
== NULL
)
722 start_subfile (fakename
, (char *) 0);
723 xfree (current_subfile
->name
);
725 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
730 current_subfile
->line_vector
=
731 (struct linetable
*) xrealloc
732 (lv
, (sizeof (struct linetable
)
733 + lv
->nitems
* sizeof (struct linetable_entry
)));
739 current_subfile
->line_vector
= lineTb
;
742 current_subfile
->line_vector_length
=
743 current_subfile
->line_vector
->nitems
;
744 start_subfile (pop_subfile (), (char *) 0);
748 return_after_cleanup
:
750 /* We don't want to keep alloc/free'ing the global include file table. */
753 /* Start with a fresh subfile structure for the next file. */
754 memset (&main_subfile
, '\0', sizeof (struct subfile
));
758 aix_process_linenos (void)
760 /* Process line numbers and enter them into line vector. */
761 process_linenos (last_source_start_addr
, cur_src_end_addr
);
765 /* Enter a given range of lines into the line vector.
766 can be called in the following two ways:
767 enter_line_range (subfile, beginoffset, endoffset,
768 startaddr, 0, firstLine) or
769 enter_line_range (subfile, beginoffset, 0,
770 startaddr, endaddr, firstLine)
772 endoffset points to the last line table entry that we should pay
776 enter_line_range (struct subfile
*subfile
, unsigned beginoffset
,
777 unsigned endoffset
, /* offsets to line table */
778 CORE_ADDR startaddr
, /* offsets to line table */
779 CORE_ADDR endaddr
, unsigned *firstLine
)
781 struct objfile
*objfile
= this_symtab_psymtab
->objfile
;
782 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
783 unsigned int curoffset
;
786 struct internal_lineno int_lnno
;
787 unsigned int limit_offset
;
791 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
793 curoffset
= beginoffset
;
795 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)
800 if (endoffset
>= limit_offset
)
802 complaint (&symfile_complaints
,
803 _("Bad line table offset in C_EINCL directive"));
806 limit_offset
= endoffset
;
811 abfd
= objfile
->obfd
;
812 linesz
= coff_data (abfd
)->local_linesz
;
813 ext_lnno
= alloca (linesz
);
815 while (curoffset
<= limit_offset
)
817 bfd_seek (abfd
, curoffset
, SEEK_SET
);
818 bfd_bread (ext_lnno
, linesz
, abfd
);
819 bfd_coff_swap_lineno_in (abfd
, ext_lnno
, &int_lnno
);
821 /* Find the address this line represents. */
822 addr
= (int_lnno
.l_lnno
823 ? int_lnno
.l_addr
.l_paddr
824 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
825 addr
+= ANOFFSET (objfile
->section_offsets
, SECT_OFF_TEXT (objfile
));
827 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
830 if (int_lnno
.l_lnno
== 0)
832 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
833 record_line (subfile
, 0, gdbarch_addr_bits_remove (gdbarch
, addr
));
837 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
,
838 gdbarch_addr_bits_remove (gdbarch
, addr
));
844 /* Save the vital information for use when closing off the current file.
845 NAME is the file name the symbols came from, START_ADDR is the first
846 text address for the file, and SIZE is the number of bytes of text. */
848 #define complete_symtab(name, start_addr) { \
849 last_source_file = xstrdup (name); \
850 last_source_start_addr = start_addr; \
854 /* Refill the symbol table input buffer
855 and set the variables that control fetching entries from it.
856 Reports an error if no data available.
857 This function can read past the end of the symbol table
858 (into the string table) but this does no harm. */
860 /* Reading symbol table has to be fast! Keep the followings as macros, rather
863 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
868 if (namestr[0] == '.') ++namestr; \
869 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
870 (SECTION), (asection *)NULL, \
872 misc_func_recorded = 1; \
876 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
877 nested. At any given time, a symbol can only be in one static block.
878 This is the base address of current static block, zero if non exists. */
880 static int static_block_base
= 0;
882 /* Section number for the current static block. */
884 static int static_block_section
= -1;
886 /* true if space for symbol name has been allocated. */
888 static int symname_alloced
= 0;
890 /* Next symbol to read. Pointer into raw seething symbol table. */
892 static char *raw_symbol
;
894 /* This is the function which stabsread.c calls to get symbol
898 xcoff_next_symbol_text (struct objfile
*objfile
)
900 struct internal_syment symbol
;
903 /* FIXME: is this the same as the passed arg? */
904 if (this_symtab_psymtab
)
905 objfile
= this_symtab_psymtab
->objfile
;
907 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
910 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
912 /* Return something which points to '\0' and hope the symbol reading
913 code does something reasonable. */
916 else if (symbol
.n_sclass
& 0x80)
918 retval
= ((struct coff_symfile_info
*)
919 objfile
->deprecated_sym_private
)->debugsec
921 raw_symbol
+= coff_data (objfile
->obfd
)->local_symesz
;
926 complaint (&symfile_complaints
, _("Unexpected symbol continuation"));
928 /* Return something which points to '\0' and hope the symbol reading
929 code does something reasonable. */
935 /* Read symbols for a given partial symbol table. */
938 read_xcoff_symtab (struct partial_symtab
*pst
)
940 struct objfile
*objfile
= pst
->objfile
;
941 bfd
*abfd
= objfile
->obfd
;
942 char *raw_auxptr
; /* Pointer to first raw aux entry for sym. */
944 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
;
946 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->debugsec
;
947 const char *debugfmt
= bfd_xcoff_is_xcoff64 (abfd
) ? "XCOFF64" : "XCOFF";
949 struct internal_syment symbol
[1];
950 union internal_auxent main_aux
;
951 struct coff_symbol cs
[1];
952 CORE_ADDR file_start_addr
= 0;
953 CORE_ADDR file_end_addr
= 0;
955 int next_file_symnum
= -1;
956 unsigned int max_symnum
;
957 int just_started
= 1;
959 int fcn_start_addr
= 0;
961 struct coff_symbol fcn_stab_saved
= { 0 };
963 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
964 union internal_auxent fcn_aux_saved
;
965 struct context_stack
*new;
967 char *filestring
= " _start_ "; /* Name of the current file. */
969 char *last_csect_name
; /* Last seen csect's name and value. */
970 CORE_ADDR last_csect_val
;
973 this_symtab_psymtab
= pst
;
975 /* Get the appropriate COFF "constants" related to the file we're
977 local_symesz
= coff_data (abfd
)->local_symesz
;
979 last_source_file
= NULL
;
984 start_symtab (filestring
, (char *) NULL
, file_start_addr
);
985 record_debugformat (debugfmt
);
986 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
988 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
989 first_object_file_end
= 0;
992 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
993 + symnum
* local_symesz
;
995 while (symnum
< max_symnum
)
997 QUIT
; /* make this command interruptable. */
999 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1000 /* read one symbol into `cs' structure. After processing the
1001 whole symbol table, only string table will be kept in memory,
1002 symbol table and debug section of xcoff will be freed. Thus
1003 we can mark symbols with names in string table as
1008 /* Swap and align the symbol into a reasonable C structure. */
1009 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1011 cs
->c_symnum
= symnum
;
1012 cs
->c_naux
= symbol
->n_numaux
;
1013 if (symbol
->n_zeroes
)
1015 symname_alloced
= 0;
1016 /* We must use the original, unswapped, name here so the name field
1017 pointed to by cs->c_name will persist throughout xcoffread. If
1018 we use the new field, it gets overwritten for each symbol. */
1019 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1020 /* If it's exactly E_SYMNMLEN characters long it isn't
1022 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1026 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
1027 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1028 p
[E_SYMNMLEN
] = '\0';
1030 symname_alloced
= 1;
1033 else if (symbol
->n_sclass
& 0x80)
1035 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1036 symname_alloced
= 0;
1040 /* in string table */
1041 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1042 symname_alloced
= 1;
1044 cs
->c_value
= symbol
->n_value
;
1045 cs
->c_sclass
= symbol
->n_sclass
;
1046 cs
->c_secnum
= symbol
->n_scnum
;
1047 cs
->c_type
= (unsigned) symbol
->n_type
;
1049 raw_symbol
+= local_symesz
;
1052 /* Save addr of first aux entry. */
1053 raw_auxptr
= raw_symbol
;
1055 /* Skip all the auxents associated with this symbol. */
1056 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1058 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1063 /* if symbol name starts with ".$" or "$", ignore it. */
1064 if (cs
->c_name
[0] == '$'
1065 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1068 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1070 if (last_source_file
)
1072 pst
->symtab
= end_symtab (cur_src_end_addr
, objfile
,
1073 SECT_OFF_TEXT (objfile
));
1078 start_symtab ("_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1079 record_debugformat (debugfmt
);
1080 cur_src_end_addr
= first_object_file_end
;
1081 /* Done with all files, everything from here on is globals. */
1084 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1087 /* Dealing with a symbol with a csect entry. */
1089 #define CSECT(PP) ((PP)->x_csect)
1090 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1091 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1092 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1093 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1095 /* Convert the auxent to something we can access. */
1096 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1097 0, cs
->c_naux
, &main_aux
);
1099 switch (CSECT_SMTYP (&main_aux
))
1103 /* Ignore all external references. */
1107 /* A section description. */
1109 switch (CSECT_SCLAS (&main_aux
))
1115 /* A program csect is seen. We have to allocate one
1116 symbol table for each program csect. Normally gdb
1117 prefers one symtab for each source file. In case
1118 of AIX, one source file might include more than one
1119 [PR] csect, and they don't have to be adjacent in
1120 terms of the space they occupy in memory. Thus, one
1121 single source file might get fragmented in the
1122 memory and gdb's file start and end address
1123 approach does not work! GCC (and I think xlc) seem
1124 to put all the code in the unnamed program csect. */
1126 if (last_csect_name
)
1128 complete_symtab (filestring
, file_start_addr
);
1129 cur_src_end_addr
= file_end_addr
;
1130 end_symtab (file_end_addr
, objfile
,
1131 SECT_OFF_TEXT (objfile
));
1134 /* Give all csects for this source file the same
1136 start_symtab (filestring
, NULL
, (CORE_ADDR
) 0);
1137 record_debugformat (debugfmt
);
1140 /* If this is the very first csect seen,
1141 basically `__start'. */
1144 first_object_file_end
1145 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1150 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1151 SECT_OFF_TEXT (objfile
));
1152 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1154 if (cs
->c_name
&& (cs
->c_name
[0] == '.'
1155 || cs
->c_name
[0] == '@'))
1157 last_csect_name
= cs
->c_name
;
1158 last_csect_val
= cs
->c_value
;
1159 last_csect_sec
= secnum_to_section (cs
->c_secnum
,
1165 /* All other symbols are put into the minimal symbol
1178 /* Ignore the symbol. */
1186 switch (CSECT_SCLAS (&main_aux
))
1189 /* a function entry point. */
1190 function_entry_point
:
1192 fcn_start_addr
= cs
->c_value
;
1194 /* save the function header info, which will be used
1195 when `.bf' is seen. */
1197 fcn_aux_saved
= main_aux
;
1201 /* shared library function trampoline code entry point. */
1205 /* The symbols often have the same names as debug symbols for
1206 functions, and confuse lookup_symbol. */
1210 /* xlc puts each variable in a separate csect, so we get
1211 an XTY_SD for each variable. But gcc puts several
1212 variables in a csect, so that each variable only gets
1213 an XTY_LD. This will typically be XMC_RW; I suspect
1214 XMC_RO and XMC_BS might be possible too.
1215 These variables are put in the minimal symbol table
1222 /* Common symbols are put into the minimal symbol table only. */
1230 /* If explicitly specified as a function, treat is as one. This check
1231 evaluates to true for @FIX* bigtoc CSECT symbols, so it must occur
1232 after the above CSECT check. */
1233 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1235 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1236 0, cs
->c_naux
, &main_aux
);
1237 goto function_entry_point
;
1240 switch (cs
->c_sclass
)
1244 /* c_value field contains symnum of next .file entry in table
1245 or symnum of first global after last .file. */
1247 next_file_symnum
= cs
->c_value
;
1249 /* Complete symbol table for last object file containing
1250 debugging information. */
1252 /* Whether or not there was a csect in the previous file, we
1253 have to call `end_stabs' and `start_stabs' to reset
1254 type_vector, line_vector, etc. structures. */
1256 complete_symtab (filestring
, file_start_addr
);
1257 cur_src_end_addr
= file_end_addr
;
1258 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1261 /* XCOFF, according to the AIX 3.2 documentation, puts the
1262 filename in cs->c_name. But xlc 1.3.0.2 has decided to
1263 do things the standard COFF way and put it in the auxent.
1264 We use the auxent if the symbol is ".file" and an auxent
1265 exists, otherwise use the symbol itself. Simple
1267 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1269 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1270 0, cs
->c_naux
, &main_aux
);
1271 filestring
= coff_getfilename (&main_aux
, objfile
);
1274 filestring
= cs
->c_name
;
1277 start_symtab (filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1278 record_debugformat (debugfmt
);
1279 last_csect_name
= 0;
1281 /* reset file start and end addresses. A compilation unit
1282 with no text (only data) should have zero file
1284 file_start_addr
= file_end_addr
= 0;
1288 fcn_stab_saved
= *cs
;
1292 if (strcmp (cs
->c_name
, ".bf") == 0)
1294 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1295 SECT_OFF_TEXT (objfile
));
1297 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1298 0, cs
->c_naux
, &main_aux
);
1300 within_function
= 1;
1302 new = push_context (0, fcn_start_addr
+ off
);
1304 new->name
= define_symbol
1305 (fcn_cs_saved
.c_value
+ off
,
1306 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1307 if (new->name
!= NULL
)
1308 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT (objfile
);
1310 else if (strcmp (cs
->c_name
, ".ef") == 0)
1312 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1313 0, cs
->c_naux
, &main_aux
);
1315 /* The value of .ef is the address of epilogue code;
1316 not useful for gdb. */
1317 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1318 contains number of lines to '}' */
1320 if (context_stack_depth
<= 0)
1321 { /* We attempted to pop an empty context stack. */
1322 ef_complaint (cs
->c_symnum
);
1323 within_function
= 0;
1326 new = pop_context ();
1327 /* Stack must be empty now. */
1328 if (context_stack_depth
> 0 || new == NULL
)
1330 ef_complaint (cs
->c_symnum
);
1331 within_function
= 0;
1335 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1337 (fcn_cs_saved
.c_value
1338 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1339 + ANOFFSET (objfile
->section_offsets
,
1340 SECT_OFF_TEXT (objfile
))),
1342 within_function
= 0;
1347 /* Begin static block. */
1349 struct internal_syment symbol
;
1351 read_symbol (&symbol
, cs
->c_value
);
1352 static_block_base
= symbol
.n_value
;
1353 static_block_section
=
1354 secnum_to_section (symbol
.n_scnum
, objfile
);
1359 /* End of static block. */
1360 static_block_base
= 0;
1361 static_block_section
= -1;
1372 complaint (&symfile_complaints
,
1373 _("Unrecognized storage class %d."),
1388 /* beginning of include file */
1389 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1390 order. Thus, when wee see them, we might not know enough info
1391 to process them. Thus, we'll be saving them into a table
1392 (inclTable) and postpone their processing. */
1394 record_include_begin (cs
);
1398 /* End of include file. */
1399 /* See the comment after case C_BINCL. */
1400 record_include_end (cs
);
1404 if (strcmp (cs
->c_name
, ".bb") == 0)
1407 new = push_context (depth
,
1409 + ANOFFSET (objfile
->section_offsets
,
1410 SECT_OFF_TEXT (objfile
))));
1412 else if (strcmp (cs
->c_name
, ".eb") == 0)
1414 if (context_stack_depth
<= 0)
1415 { /* We attempted to pop an empty context stack. */
1416 eb_complaint (cs
->c_symnum
);
1419 new = pop_context ();
1420 if (depth
-- != new->depth
)
1422 eb_complaint (cs
->c_symnum
);
1425 if (local_symbols
&& context_stack_depth
> 0)
1427 /* Make a block for the local symbols within. */
1428 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1431 + ANOFFSET (objfile
->section_offsets
,
1432 SECT_OFF_TEXT (objfile
))),
1435 local_symbols
= new->locals
;
1440 process_xcoff_symbol (cs
, objfile
);
1445 if (last_source_file
)
1449 complete_symtab (filestring
, file_start_addr
);
1450 cur_src_end_addr
= file_end_addr
;
1451 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1452 /* When reading symbols for the last C_FILE of the objfile, try
1453 to make sure that we set pst->symtab to the symtab for the
1454 file, not to the _globals_ symtab. I'm not sure whether this
1455 actually works right or when/if it comes up. */
1456 if (pst
->symtab
== NULL
)
1462 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1463 (SYMBOL2) = (struct symbol *) \
1464 obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); \
1465 *(SYMBOL2) = *(SYMBOL1);
1468 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1469 ((ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), \
1470 &objfile->objfile_obstack))
1473 /* process one xcoff symbol. */
1475 static struct symbol
*
1476 process_xcoff_symbol (struct coff_symbol
*cs
, struct objfile
*objfile
)
1478 struct symbol onesymbol
;
1479 struct symbol
*sym
= &onesymbol
;
1480 struct symbol
*sym2
= NULL
;
1486 if (cs
->c_secnum
< 0)
1488 /* The value is a register number, offset within a frame, etc.,
1489 and does not get relocated. */
1495 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1496 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1503 memset (sym
, '\0', sizeof (struct symbol
));
1505 /* default assumptions */
1506 SYMBOL_VALUE_ADDRESS (sym
) = cs
->c_value
+ off
;
1507 SYMBOL_DOMAIN (sym
) = VAR_DOMAIN
;
1508 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1510 if (ISFCN (cs
->c_type
))
1512 /* At this point, we don't know the type of the function. This
1513 will be patched with the type from its stab entry later on in
1514 patch_block_stabs (), unless the file was compiled without -g. */
1516 SYMBOL_SET_LINKAGE_NAME (sym
, SYMNAME_ALLOC (name
, symname_alloced
));
1517 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_text_symbol
;
1519 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1520 SYMBOL_DUP (sym
, sym2
);
1522 if (cs
->c_sclass
== C_EXT
)
1523 add_symbol_to_list (sym2
, &global_symbols
);
1524 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1525 add_symbol_to_list (sym2
, &file_symbols
);
1529 /* In case we can't figure out the type, provide default. */
1530 SYMBOL_TYPE (sym
) = objfile_type (objfile
)->nodebug_data_symbol
;
1532 switch (cs
->c_sclass
)
1535 /* The values of functions and global symbols are now resolved
1536 via the global_sym_chain in stabsread.c. */
1538 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1539 add_stab_to_list (name
, &global_stabs
);
1541 add_stab_to_list (name
, &file_stabs
);
1545 add_stab_to_list (name
, &global_stabs
);
1550 common_block_start (cs
->c_name
, objfile
);
1554 common_block_end (objfile
);
1558 complaint (&symfile_complaints
, _("Unexpected storage class: %d"),
1571 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1574 SYMBOL_SECTION (sym
) = sec
;
1581 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1582 all statics and we need to distinguish file-scope versus
1583 function-scope using within_function. We do this by
1584 changing the string we pass to define_symbol to use 'S'
1585 where we need to, which is not necessarily super-clean,
1586 but seems workable enough. */
1591 pp
= strchr (name
, ':');
1596 if (*pp
== 'V' && !within_function
)
1598 sym
= define_symbol ((cs
->c_value
1599 + ANOFFSET (objfile
->section_offsets
,
1600 static_block_section
)),
1601 cs
->c_name
, 0, 0, objfile
);
1604 SYMBOL_VALUE_ADDRESS (sym
) += static_block_base
;
1605 SYMBOL_SECTION (sym
) = static_block_section
;
1614 /* Extract the file name from the aux entry of a C_FILE symbol.
1615 Result is in static storage and is only good for temporary use. */
1618 coff_getfilename (union internal_auxent
*aux_entry
, struct objfile
*objfile
)
1620 static char buffer
[BUFSIZ
];
1622 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1623 strcpy (buffer
, ((struct coff_symfile_info
*)
1624 objfile
->deprecated_sym_private
)->strtbl
1625 + aux_entry
->x_file
.x_n
.x_offset
);
1628 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1629 buffer
[FILNMLEN
] = '\0';
1634 /* Set *SYMBOL to symbol number symno in symtbl. */
1636 read_symbol (struct internal_syment
*symbol
, int symno
)
1639 = ((struct coff_symfile_info
*)
1640 this_symtab_psymtab
->objfile
->deprecated_sym_private
)->symtbl_num_syms
;
1641 char *stbl
= ((struct coff_symfile_info
*)
1642 this_symtab_psymtab
->objfile
->deprecated_sym_private
)->symtbl
;
1644 if (symno
< 0 || symno
>= nsyms
)
1646 complaint (&symfile_complaints
, _("Invalid symbol offset"));
1647 symbol
->n_value
= 0;
1648 symbol
->n_scnum
= -1;
1651 bfd_coff_swap_sym_in (this_symtab_psymtab
->objfile
->obfd
,
1652 stbl
+ (symno
* local_symesz
),
1656 /* Get value corresponding to symbol number symno in symtbl. */
1659 read_symbol_nvalue (int symno
)
1661 struct internal_syment symbol
[1];
1663 read_symbol (symbol
, symno
);
1664 return symbol
->n_value
;
1668 /* Find the address of the function corresponding to symno, where
1669 symno is the symbol pointed to by the linetable. */
1672 read_symbol_lineno (int symno
)
1674 struct objfile
*objfile
= this_symtab_psymtab
->objfile
;
1675 int xcoff64
= bfd_xcoff_is_xcoff64 (objfile
->obfd
);
1677 struct coff_symfile_info
*info
=
1678 (struct coff_symfile_info
*)objfile
->deprecated_sym_private
;
1679 int nsyms
= info
->symtbl_num_syms
;
1680 char *stbl
= info
->symtbl
;
1681 char *strtbl
= info
->strtbl
;
1683 struct internal_syment symbol
[1];
1684 union internal_auxent main_aux
[1];
1688 bf_notfound_complaint ();
1692 /* Note that just searching for a short distance (e.g. 50 symbols)
1693 is not enough, at least in the following case.
1696 [many .stabx entries]
1697 [a few functions, referring to foo]
1701 What happens here is that the assembler moves the .stabx entries
1702 to right before the ".bf" for foo, but the symbol for "foo" is before
1703 all the stabx entries. See PR gdb/2222. */
1705 /* Maintaining a table of .bf entries might be preferable to this search.
1706 If I understand things correctly it would need to be done only for
1707 the duration of a single psymtab to symtab conversion. */
1708 while (symno
< nsyms
)
1710 bfd_coff_swap_sym_in (symfile_bfd
,
1711 stbl
+ (symno
* local_symesz
), symbol
);
1712 if (symbol
->n_sclass
== C_FCN
)
1714 char *name
= xcoff64
? strtbl
+ symbol
->n_offset
: symbol
->n_name
;
1716 if (strcmp (name
, ".bf") == 0)
1719 symno
+= symbol
->n_numaux
+ 1;
1722 bf_notfound_complaint ();
1726 /* Take aux entry and return its lineno. */
1728 bfd_coff_swap_aux_in (objfile
->obfd
, stbl
+ symno
* local_symesz
,
1729 symbol
->n_type
, symbol
->n_sclass
,
1730 0, symbol
->n_numaux
, main_aux
);
1732 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1735 /* Support for line number handling. */
1737 /* This function is called for every section; it finds the outer limits
1738 * of the line table (minimum and maximum file offset) so that the
1739 * mainline code can read the whole thing for efficiency.
1742 find_linenos (struct bfd
*abfd
, struct bfd_section
*asect
, void *vpinfo
)
1744 struct coff_symfile_info
*info
;
1746 file_ptr offset
, maxoff
;
1748 count
= asect
->lineno_count
;
1750 if (strcmp (asect
->name
, ".text") != 0 || count
== 0)
1753 size
= count
* coff_data (abfd
)->local_linesz
;
1754 info
= (struct coff_symfile_info
*) vpinfo
;
1755 offset
= asect
->line_filepos
;
1756 maxoff
= offset
+ size
;
1758 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1759 info
->min_lineno_offset
= offset
;
1761 if (maxoff
> info
->max_lineno_offset
)
1762 info
->max_lineno_offset
= maxoff
;
1765 static void xcoff_psymtab_to_symtab_1 (struct partial_symtab
*);
1768 xcoff_psymtab_to_symtab_1 (struct partial_symtab
*pst
)
1770 struct cleanup
*old_chain
;
1779 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1784 /* Read in all partial symtabs on which this one is dependent. */
1785 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1786 if (!pst
->dependencies
[i
]->readin
)
1788 /* Inform about additional files that need to be read in. */
1791 fputs_filtered (" ", gdb_stdout
);
1793 fputs_filtered ("and ", gdb_stdout
);
1795 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1796 wrap_here (""); /* Flush output */
1797 gdb_flush (gdb_stdout
);
1799 xcoff_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1802 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1804 /* Init stuff necessary for reading in symbols. */
1807 old_chain
= make_cleanup (really_free_pendings
, 0);
1809 read_xcoff_symtab (pst
);
1811 do_cleanups (old_chain
);
1817 static void xcoff_psymtab_to_symtab (struct partial_symtab
*);
1819 /* Read in all of the symbols for a given psymtab for real.
1820 Be verbose about it if the user wants that. */
1823 xcoff_psymtab_to_symtab (struct partial_symtab
*pst
)
1833 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1838 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0
1839 || pst
->number_of_dependencies
)
1841 /* Print the message now, before reading the string table,
1842 to avoid disconcerting pauses. */
1845 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1846 gdb_flush (gdb_stdout
);
1849 sym_bfd
= pst
->objfile
->obfd
;
1851 next_symbol_text_func
= xcoff_next_symbol_text
;
1853 xcoff_psymtab_to_symtab_1 (pst
);
1855 /* Match with global symbols. This only needs to be done once,
1856 after all of the symtabs and dependencies have been read in. */
1857 scan_file_globals (pst
->objfile
);
1859 /* Finish up the debug error message. */
1861 printf_filtered ("done.\n");
1866 xcoff_new_init (struct objfile
*objfile
)
1868 stabsread_new_init ();
1869 buildsym_new_init ();
1872 /* Do initialization in preparation for reading symbols from OBJFILE.
1874 We will only be called if this is an XCOFF or XCOFF-like file.
1875 BFD handles figuring out the format of the file, and code in symfile.c
1876 uses BFD's determination to vector to us. */
1879 xcoff_symfile_init (struct objfile
*objfile
)
1881 /* Allocate struct to keep track of the symfile. */
1882 objfile
->deprecated_sym_private
1883 = xmalloc (sizeof (struct coff_symfile_info
));
1885 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1886 find this causes a significant slowdown in gdb then we could
1887 set it in the debug symbol readers only when necessary. */
1888 objfile
->flags
|= OBJF_REORDERED
;
1890 init_entry_point_info (objfile
);
1893 /* Perform any local cleanups required when we are done with a particular
1894 objfile. I.E, we are in the process of discarding all symbol information
1895 for an objfile, freeing up all memory held for it, and unlinking the
1896 objfile struct from the global list of known objfiles. */
1899 xcoff_symfile_finish (struct objfile
*objfile
)
1901 if (objfile
->deprecated_sym_private
!= NULL
)
1903 xfree (objfile
->deprecated_sym_private
);
1906 /* Start with a fresh include table for the next objfile. */
1912 inclIndx
= inclLength
= inclDepth
= 0;
1917 init_stringtab (bfd
*abfd
, file_ptr offset
, struct objfile
*objfile
)
1921 unsigned char lengthbuf
[4];
1924 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
1927 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1928 error (_("cannot seek to string table in %s: %s"),
1929 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1931 val
= bfd_bread ((char *) lengthbuf
, sizeof lengthbuf
, abfd
);
1932 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1934 /* If no string table is needed, then the file may end immediately
1935 after the symbols. Just return with `strtbl' set to NULL. */
1937 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1940 /* Allocate string table from objfile_obstack. We will need this table
1941 as long as we have its symbol table around. */
1943 strtbl
= (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
1944 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->strtbl
1947 /* Copy length buffer, the first byte is usually zero and is
1948 used for stabs with a name length of zero. */
1949 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1950 if (length
== sizeof lengthbuf
)
1953 val
= bfd_bread (strtbl
+ sizeof lengthbuf
, length
- sizeof lengthbuf
, abfd
);
1955 if (val
!= length
- sizeof lengthbuf
)
1956 error (_("cannot read string table from %s: %s"),
1957 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1958 if (strtbl
[length
- 1] != '\0')
1959 error (_("bad symbol file: string table "
1960 "does not end with null character"));
1965 /* If we have not yet seen a function for this psymtab, this is 0. If we
1966 have seen one, it is the offset in the line numbers of the line numbers
1968 static unsigned int first_fun_line_offset
;
1970 static struct partial_symtab
*xcoff_start_psymtab
1971 (struct objfile
*, char *, int,
1972 struct partial_symbol
**, struct partial_symbol
**);
1974 /* Allocate and partially fill a partial symtab. It will be
1975 completely filled at the end of the symbol list.
1977 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1978 is the address relative to which its symbols are (incremental) or 0
1981 static struct partial_symtab
*
1982 xcoff_start_psymtab (struct objfile
*objfile
, char *filename
, int first_symnum
,
1983 struct partial_symbol
**global_syms
,
1984 struct partial_symbol
**static_syms
)
1986 struct partial_symtab
*result
=
1987 start_psymtab_common (objfile
, objfile
->section_offsets
,
1989 /* We fill in textlow later. */
1991 global_syms
, static_syms
);
1993 result
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
1994 sizeof (struct symloc
));
1995 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
1996 result
->read_symtab
= xcoff_psymtab_to_symtab
;
1998 /* Deduce the source language from the filename for this psymtab. */
1999 psymtab_language
= deduce_language_from_filename (filename
);
2004 static struct partial_symtab
*xcoff_end_psymtab
2005 (struct partial_symtab
*, char **, int, int,
2006 struct partial_symtab
**, int, int);
2008 /* Close off the current usage of PST.
2009 Returns PST, or NULL if the partial symtab was empty and thrown away.
2011 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2013 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2014 are the information for includes and dependencies. */
2016 static struct partial_symtab
*
2017 xcoff_end_psymtab (struct partial_symtab
*pst
, char **include_list
,
2018 int num_includes
, int capping_symbol_number
,
2019 struct partial_symtab
**dependency_list
,
2020 int number_dependencies
, int textlow_not_set
)
2023 struct objfile
*objfile
= pst
->objfile
;
2025 if (capping_symbol_number
!= -1)
2026 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2027 capping_symbol_number
2028 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2029 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2030 first_fun_line_offset
;
2031 first_fun_line_offset
= 0;
2032 pst
->n_global_syms
= objfile
->global_psymbols
.next
2033 - (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2034 pst
->n_static_syms
= objfile
->static_psymbols
.next
2035 - (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2037 pst
->number_of_dependencies
= number_dependencies
;
2038 if (number_dependencies
)
2040 pst
->dependencies
= (struct partial_symtab
**)
2041 obstack_alloc (&objfile
->objfile_obstack
,
2042 number_dependencies
* sizeof (struct partial_symtab
*));
2043 memcpy (pst
->dependencies
, dependency_list
,
2044 number_dependencies
* sizeof (struct partial_symtab
*));
2047 pst
->dependencies
= 0;
2049 for (i
= 0; i
< num_includes
; i
++)
2051 struct partial_symtab
*subpst
=
2052 allocate_psymtab (include_list
[i
], objfile
);
2054 subpst
->section_offsets
= pst
->section_offsets
;
2055 subpst
->read_symtab_private
= obstack_alloc (&objfile
->objfile_obstack
,
2056 sizeof (struct symloc
));
2057 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2058 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2059 subpst
->textlow
= 0;
2060 subpst
->texthigh
= 0;
2062 /* We could save slight bits of space by only making one of these,
2063 shared by the entire set of include files. FIXME-someday. */
2064 subpst
->dependencies
= (struct partial_symtab
**)
2065 obstack_alloc (&objfile
->objfile_obstack
,
2066 sizeof (struct partial_symtab
*));
2067 subpst
->dependencies
[0] = pst
;
2068 subpst
->number_of_dependencies
= 1;
2070 subpst
->globals_offset
=
2071 subpst
->n_global_syms
=
2072 subpst
->statics_offset
=
2073 subpst
->n_static_syms
= 0;
2077 subpst
->read_symtab
= pst
->read_symtab
;
2080 sort_pst_symbols (pst
);
2082 if (num_includes
== 0
2083 && number_dependencies
== 0
2084 && pst
->n_global_syms
== 0
2085 && pst
->n_static_syms
== 0)
2087 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2088 it is on the obstack, but we can forget to chain it on the list. */
2089 /* Empty psymtabs happen as a result of header files which don't have
2090 any symbols in them. There can be a lot of them. */
2092 discard_psymtab (pst
);
2094 /* Indicate that psymtab was thrown away. */
2095 pst
= (struct partial_symtab
*) NULL
;
2100 static void swap_sym (struct internal_syment
*,
2101 union internal_auxent
*, char **, char **,
2102 unsigned int *, struct objfile
*);
2104 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2105 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2106 the symbol and its auxents. */
2109 swap_sym (struct internal_syment
*symbol
, union internal_auxent
*aux
,
2110 char **name
, char **raw
, unsigned int *symnump
,
2111 struct objfile
*objfile
)
2113 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2114 if (symbol
->n_zeroes
)
2116 /* If it's exactly E_SYMNMLEN characters long it isn't
2118 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2120 /* FIXME: wastes memory for symbols which we don't end up putting
2121 into the minimal symbols. */
2124 p
= obstack_alloc (&objfile
->objfile_obstack
, E_SYMNMLEN
+ 1);
2125 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2126 p
[E_SYMNMLEN
] = '\0';
2130 /* Point to the unswapped name as that persists as long as the
2132 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2134 else if (symbol
->n_sclass
& 0x80)
2136 *name
= ((struct coff_symfile_info
*)
2137 objfile
->deprecated_sym_private
)->debugsec
+ symbol
->n_offset
;
2141 *name
= ((struct coff_symfile_info
*)
2142 objfile
->deprecated_sym_private
)->strtbl
+ symbol
->n_offset
;
2145 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2146 if (symbol
->n_numaux
> 0)
2148 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2149 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2151 *symnump
+= symbol
->n_numaux
;
2152 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2157 function_outside_compilation_unit_complaint (const char *arg1
)
2159 complaint (&symfile_complaints
,
2160 _("function `%s' appears to be defined "
2161 "outside of all compilation units"),
2166 scan_xcoff_symtab (struct objfile
*objfile
)
2168 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2169 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2170 char *filestring
= NULL
;
2173 int past_first_source_file
= 0;
2178 /* Current partial symtab */
2179 struct partial_symtab
*pst
;
2181 /* List of current psymtab's include files. */
2182 char **psymtab_include_list
;
2183 int includes_allocated
;
2186 /* Index within current psymtab dependency list. */
2187 struct partial_symtab
**dependency_list
;
2188 int dependencies_used
, dependencies_allocated
;
2191 struct internal_syment symbol
;
2192 union internal_auxent main_aux
[5];
2193 unsigned int ssymnum
;
2195 char *last_csect_name
= NULL
; /* Last seen csect's name and value. */
2196 CORE_ADDR last_csect_val
= 0;
2197 int last_csect_sec
= 0;
2198 int misc_func_recorded
= 0; /* true if any misc. function. */
2199 int textlow_not_set
= 1;
2201 pst
= (struct partial_symtab
*) 0;
2203 includes_allocated
= 30;
2205 psymtab_include_list
= (char **) alloca (includes_allocated
*
2208 dependencies_allocated
= 30;
2209 dependencies_used
= 0;
2211 (struct partial_symtab
**) alloca (dependencies_allocated
*
2212 sizeof (struct partial_symtab
*));
2214 last_source_file
= NULL
;
2216 abfd
= objfile
->obfd
;
2217 next_symbol_text_func
= xcoff_next_symbol_text
;
2219 sraw_symbol
= ((struct coff_symfile_info
*)
2220 objfile
->deprecated_sym_private
)->symtbl
;
2221 nsyms
= ((struct coff_symfile_info
*)
2222 objfile
->deprecated_sym_private
)->symtbl_num_syms
;
2224 while (ssymnum
< nsyms
)
2230 bfd_coff_swap_sym_in (abfd
, sraw_symbol
, &symbol
);
2231 sclass
= symbol
.n_sclass
;
2238 /* The CSECT auxent--always the last auxent. */
2239 union internal_auxent csect_aux
;
2240 unsigned int symnum_before
= ssymnum
;
2242 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2244 if (symbol
.n_numaux
> 1)
2246 bfd_coff_swap_aux_in
2248 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2251 symbol
.n_numaux
- 1,
2256 csect_aux
= main_aux
[0];
2258 /* If symbol name starts with ".$" or "$", ignore it. */
2259 if (namestring
[0] == '$'
2260 || (namestring
[0] == '.' && namestring
[1] == '$'))
2263 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2266 switch (csect_aux
.x_csect
.x_smclas
)
2269 if (last_csect_name
)
2271 /* If no misc. function recorded in the last
2272 seen csect, enter it as a function. This
2273 will take care of functions like strcmp()
2276 if (!misc_func_recorded
)
2278 RECORD_MINIMAL_SYMBOL
2279 (last_csect_name
, last_csect_val
,
2280 mst_text
, last_csect_sec
,
2286 /* We have to allocate one psymtab for
2287 each program csect, because their text
2288 sections need not be adjacent. */
2290 (pst
, psymtab_include_list
, includes_used
,
2291 symnum_before
, dependency_list
,
2292 dependencies_used
, textlow_not_set
);
2294 dependencies_used
= 0;
2295 /* Give all psymtabs for this source file the same
2297 pst
= xcoff_start_psymtab
2301 objfile
->global_psymbols
.next
,
2302 objfile
->static_psymbols
.next
);
2305 /* Activate the misc_func_recorded mechanism for
2306 compiler- and linker-generated CSECTs like ".strcmp"
2308 if (namestring
&& (namestring
[0] == '.'
2309 || namestring
[0] == '@'))
2311 last_csect_name
= namestring
;
2312 last_csect_val
= symbol
.n_value
;
2314 secnum_to_section (symbol
.n_scnum
, objfile
);
2319 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2321 if (highval
> pst
->texthigh
)
2322 pst
->texthigh
= highval
;
2323 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2324 pst
->textlow
= symbol
.n_value
;
2326 misc_func_recorded
= 0;
2331 /* Data variables are recorded in the minimal symbol
2332 table, except for section symbols. */
2333 if (*namestring
!= '.')
2334 prim_record_minimal_symbol_and_info
2335 (namestring
, symbol
.n_value
,
2336 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2337 secnum_to_section (symbol
.n_scnum
, objfile
),
2343 warning (_("More than one XMC_TC0 symbol found."));
2344 toc_offset
= symbol
.n_value
;
2346 /* Make TOC offset relative to start address of
2348 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2350 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2354 /* These symbols tell us where the TOC entry for a
2355 variable is, not the variable itself. */
2364 switch (csect_aux
.x_csect
.x_smclas
)
2367 /* A function entry point. */
2369 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2370 first_fun_line_offset
=
2371 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2372 RECORD_MINIMAL_SYMBOL
2373 (namestring
, symbol
.n_value
,
2374 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2375 secnum_to_section (symbol
.n_scnum
, objfile
),
2380 /* shared library function trampoline code entry
2383 /* record trampoline code entries as
2384 mst_solib_trampoline symbol. When we lookup mst
2385 symbols, we will choose mst_text over
2386 mst_solib_trampoline. */
2387 RECORD_MINIMAL_SYMBOL
2388 (namestring
, symbol
.n_value
,
2389 mst_solib_trampoline
,
2390 secnum_to_section (symbol
.n_scnum
, objfile
),
2395 /* The symbols often have the same names as
2396 debug symbols for functions, and confuse
2402 /* xlc puts each variable in a separate csect,
2403 so we get an XTY_SD for each variable. But
2404 gcc puts several variables in a csect, so
2405 that each variable only gets an XTY_LD. We
2406 still need to record them. This will
2407 typically be XMC_RW; I suspect XMC_RO and
2408 XMC_BS might be possible too. */
2409 if (*namestring
!= '.')
2410 prim_record_minimal_symbol_and_info
2411 (namestring
, symbol
.n_value
,
2412 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2413 secnum_to_section (symbol
.n_scnum
, objfile
),
2420 switch (csect_aux
.x_csect
.x_smclas
)
2424 /* Common variables are recorded in the minimal symbol
2425 table, except for section symbols. */
2426 if (*namestring
!= '.')
2427 prim_record_minimal_symbol_and_info
2428 (namestring
, symbol
.n_value
,
2429 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2430 secnum_to_section (symbol
.n_scnum
, objfile
),
2443 unsigned int symnum_before
;
2445 symnum_before
= ssymnum
;
2446 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2449 /* See if the last csect needs to be recorded. */
2451 if (last_csect_name
&& !misc_func_recorded
)
2453 /* If no misc. function recorded in the last seen csect, enter
2454 it as a function. This will take care of functions like
2455 strcmp() compiled by xlc. */
2457 RECORD_MINIMAL_SYMBOL
2458 (last_csect_name
, last_csect_val
,
2459 mst_text
, last_csect_sec
, objfile
);
2464 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2465 symnum_before
, dependency_list
,
2466 dependencies_used
, textlow_not_set
);
2468 dependencies_used
= 0;
2470 first_fun_line_offset
= 0;
2472 /* XCOFF, according to the AIX 3.2 documentation, puts the
2473 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2474 do things the standard COFF way and put it in the auxent.
2475 We use the auxent if the symbol is ".file" and an auxent
2476 exists, otherwise use the symbol itself. */
2477 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2479 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2482 filestring
= namestring
;
2484 pst
= xcoff_start_psymtab (objfile
,
2487 objfile
->global_psymbols
.next
,
2488 objfile
->static_psymbols
.next
);
2489 last_csect_name
= NULL
;
2495 complaint (&symfile_complaints
,
2496 _("Storage class %d not recognized during scan"),
2501 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2502 to handle only the C_FUN and C_EXT. */
2517 /* C_EINCL means we are switching back to the main file. But there
2518 is no reason to care; the only thing we want to know about
2519 includes is the names of all the included (.h) files. */
2524 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2528 /* I don't think the name of the common block (as opposed to the
2529 variables within it) is something which is user visible
2537 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2538 so C_LSYM would appear to be only for locals. */
2544 /* We probably could save a few instructions by assuming that
2545 C_LSYM, C_PSYM, etc., never have auxents. */
2546 int naux1
= symbol
.n_numaux
+ 1;
2549 sraw_symbol
+= bfd_coff_symesz (abfd
) * naux1
;
2555 /* Mark down an include file in the current psymtab. */
2556 enum language tmp_language
;
2558 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2561 tmp_language
= deduce_language_from_filename (namestring
);
2563 /* Only change the psymtab's language if we've learned
2564 something useful (eg. tmp_language is not language_unknown).
2565 In addition, to match what start_subfile does, never change
2567 if (tmp_language
!= language_unknown
2568 && (tmp_language
!= language_c
2569 || psymtab_language
!= language_cplus
))
2570 psymtab_language
= tmp_language
;
2572 /* In C++, one may expect the same filename to come round many
2573 times, when code is coming alternately from the main file
2574 and from inline functions in other files. So I check to see
2575 if this is a file we've seen before -- either the main
2576 source file, or a previously included file.
2578 This seems to be a lot of time to be spending on N_SOL, but
2579 things like "break c-exp.y:435" need to work (I
2580 suppose the psymtab_include_list could be hashed or put
2581 in a binary tree, if profiling shows this is a major hog). */
2582 if (pst
&& strcmp (namestring
, pst
->filename
) == 0)
2588 for (i
= 0; i
< includes_used
; i
++)
2589 if (strcmp (namestring
, psymtab_include_list
[i
]) == 0)
2597 psymtab_include_list
[includes_used
++] = namestring
;
2598 if (includes_used
>= includes_allocated
)
2600 char **orig
= psymtab_include_list
;
2602 psymtab_include_list
= (char **)
2603 alloca ((includes_allocated
*= 2) *
2605 memcpy (psymtab_include_list
, orig
,
2606 includes_used
* sizeof (char *));
2611 /* The value of the C_FUN is not the address of the function (it
2612 appears to be the address before linking), but as long as it
2613 is smaller than the actual address, then find_pc_partial_function
2614 will use the minimal symbols instead. I hope. */
2623 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2626 p
= strchr (namestring
, ':');
2628 continue; /* Not a debugging symbol. */
2630 /* Main processing section for debugging symbols which
2631 the initial read through the symbol tables needs to worry
2632 about. If we reach this point, the symbol which we are
2633 considering is definitely one we are interested in.
2634 p must also contain the (valid) index into the namestring
2635 which indicates the debugging type symbol. */
2640 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2641 SECT_OFF_DATA (objfile
));
2643 if (gdbarch_static_transform_name_p (gdbarch
))
2644 namestring
= gdbarch_static_transform_name
2645 (gdbarch
, namestring
);
2647 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2648 VAR_DOMAIN
, LOC_STATIC
,
2649 &objfile
->static_psymbols
,
2651 psymtab_language
, objfile
);
2655 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2656 SECT_OFF_DATA (objfile
));
2657 /* The addresses in these entries are reported to be
2658 wrong. See the code that reads 'G's for symtabs. */
2659 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2660 VAR_DOMAIN
, LOC_STATIC
,
2661 &objfile
->global_psymbols
,
2663 psymtab_language
, objfile
);
2667 /* When a 'T' entry is defining an anonymous enum, it
2668 may have a name which is the empty string, or a
2669 single space. Since they're not really defining a
2670 symbol, those shouldn't go in the partial symbol
2671 table. We do pick up the elements of such enums at
2672 'check_enum:', below. */
2673 if (p
>= namestring
+ 2
2674 || (p
== namestring
+ 1
2675 && namestring
[0] != ' '))
2677 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2678 STRUCT_DOMAIN
, LOC_TYPEDEF
,
2679 &objfile
->static_psymbols
,
2681 psymtab_language
, objfile
);
2684 /* Also a typedef with the same name. */
2685 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2686 VAR_DOMAIN
, LOC_TYPEDEF
,
2687 &objfile
->static_psymbols
,
2689 psymtab_language
, objfile
);
2696 if (p
!= namestring
) /* a name is there, not just :T... */
2698 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2699 VAR_DOMAIN
, LOC_TYPEDEF
,
2700 &objfile
->static_psymbols
,
2702 psymtab_language
, objfile
);
2705 /* If this is an enumerated type, we need to
2706 add all the enum constants to the partial symbol
2707 table. This does not cover enums without names, e.g.
2708 "enum {a, b} c;" in C, but fortunately those are
2709 rare. There is no way for GDB to find those from the
2710 enum type without spending too much time on it. Thus
2711 to solve this problem, the compiler needs to put out the
2712 enum in a nameless type. GCC2 does this. */
2714 /* We are looking for something of the form
2715 <name> ":" ("t" | "T") [<number> "="] "e"
2716 {<constant> ":" <value> ","} ";". */
2718 /* Skip over the colon and the 't' or 'T'. */
2720 /* This type may be given a number. Also, numbers can come
2721 in pairs like (0,26). Skip over it. */
2722 while ((*p
>= '0' && *p
<= '9')
2723 || *p
== '(' || *p
== ',' || *p
== ')'
2729 /* The aix4 compiler emits extra crud before the
2733 /* Skip over the type (?). */
2737 /* Skip over the colon. */
2741 /* We have found an enumerated type. */
2742 /* According to comments in read_enum_type
2743 a comma could end it instead of a semicolon.
2744 I don't know where that happens.
2746 while (*p
&& *p
!= ';' && *p
!= ',')
2750 /* Check for and handle cretinous dbx symbol name
2752 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
2753 p
= next_symbol_text (objfile
);
2755 /* Point to the character after the name
2756 of the enum constant. */
2757 for (q
= p
; *q
&& *q
!= ':'; q
++)
2759 /* Note that the value doesn't matter for
2760 enum constants in psymtabs, just in symtabs. */
2761 add_psymbol_to_list (p
, q
- p
, 1,
2762 VAR_DOMAIN
, LOC_CONST
,
2763 &objfile
->static_psymbols
, 0,
2764 0, psymtab_language
, objfile
);
2765 /* Point past the name. */
2767 /* Skip over the value. */
2768 while (*p
&& *p
!= ',')
2770 /* Advance past the comma. */
2778 /* Constant, e.g. from "const" in Pascal. */
2779 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2780 VAR_DOMAIN
, LOC_CONST
,
2781 &objfile
->static_psymbols
, symbol
.n_value
,
2782 0, psymtab_language
, objfile
);
2788 int name_len
= p
- namestring
;
2789 char *name
= xmalloc (name_len
+ 1);
2791 memcpy (name
, namestring
, name_len
);
2792 name
[name_len
] = '\0';
2793 function_outside_compilation_unit_complaint (name
);
2796 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2797 SECT_OFF_TEXT (objfile
));
2798 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2799 VAR_DOMAIN
, LOC_BLOCK
,
2800 &objfile
->static_psymbols
,
2802 psymtab_language
, objfile
);
2805 /* Global functions were ignored here, but now they
2806 are put into the global psymtab like one would expect.
2807 They're also in the minimal symbol table. */
2811 int name_len
= p
- namestring
;
2812 char *name
= xmalloc (name_len
+ 1);
2814 memcpy (name
, namestring
, name_len
);
2815 name
[name_len
] = '\0';
2816 function_outside_compilation_unit_complaint (name
);
2820 /* We need only the minimal symbols for these
2821 loader-generated definitions. Keeping the global
2822 symbols leads to "in psymbols but not in symbols"
2824 if (strncmp (namestring
, "@FIX", 4) == 0)
2827 symbol
.n_value
+= ANOFFSET (objfile
->section_offsets
,
2828 SECT_OFF_TEXT (objfile
));
2829 add_psymbol_to_list (namestring
, p
- namestring
, 1,
2830 VAR_DOMAIN
, LOC_BLOCK
,
2831 &objfile
->global_psymbols
,
2833 psymtab_language
, objfile
);
2836 /* Two things show up here (hopefully); static symbols of
2837 local scope (static used inside braces) or extensions
2838 of structure symbols. We can ignore both. */
2852 case '#': /* For symbol identification (used in
2857 /* It is a C++ nested symbol. We don't need to record it
2858 (I don't think); if we try to look up foo::bar::baz,
2859 then symbols for the symtab containing foo should get
2860 read in, I think. */
2861 /* Someone says sun cc puts out symbols like
2862 /foo/baz/maclib::/usr/local/bin/maclib,
2863 which would get here with a symbol type of ':'. */
2867 /* Unexpected symbol descriptor. The second and
2868 subsequent stabs of a continued stab can show up
2869 here. The question is whether they ever can mimic
2870 a normal stab--it would be nice if not, since we
2871 certainly don't want to spend the time searching to
2872 the end of every string looking for a
2875 complaint (&symfile_complaints
,
2876 _("unknown symbol descriptor `%c'"), p
[1]);
2878 /* Ignore it; perhaps it is an extension that we don't
2888 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2889 ssymnum
, dependency_list
,
2890 dependencies_used
, textlow_not_set
);
2893 /* Record the toc offset value of this symbol table into objfile
2894 structure. If no XMC_TC0 is found, toc_offset should be zero.
2895 Another place to obtain this information would be file auxiliary
2898 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->toc_offset
2902 /* Return the toc offset value for a given objfile. */
2905 xcoff_get_toc_offset (struct objfile
*objfile
)
2908 return ((struct coff_symfile_info
*)
2909 objfile
->deprecated_sym_private
)->toc_offset
;
2913 /* Scan and build partial symbols for a symbol file.
2914 We have been initialized by a call to dbx_symfile_init, which
2915 put all the relevant info into a "struct dbx_symfile_info",
2916 hung off the objfile structure.
2918 SECTION_OFFSETS contains offsets relative to which the symbols in the
2919 various sections are (depending where the sections were actually
2923 xcoff_initial_scan (struct objfile
*objfile
, int symfile_flags
)
2927 struct cleanup
*back_to
;
2928 int num_symbols
; /* # of symbols */
2929 file_ptr symtab_offset
; /* symbol table and */
2930 file_ptr stringtab_offset
; /* string table file offsets */
2931 struct coff_symfile_info
*info
;
2935 info
= (struct coff_symfile_info
*) objfile
->deprecated_sym_private
;
2936 symfile_bfd
= abfd
= objfile
->obfd
;
2937 name
= objfile
->name
;
2939 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2940 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2941 stringtab_offset
= symtab_offset
+
2942 num_symbols
* coff_data (abfd
)->local_symesz
;
2944 info
->min_lineno_offset
= 0;
2945 info
->max_lineno_offset
= 0;
2946 bfd_map_over_sections (abfd
, find_linenos
, info
);
2948 if (num_symbols
> 0)
2950 /* Read the string table. */
2951 init_stringtab (abfd
, stringtab_offset
, objfile
);
2953 /* Read the .debug section, if present. */
2955 struct bfd_section
*secp
;
2956 bfd_size_type length
;
2957 char *debugsec
= NULL
;
2959 secp
= bfd_get_section_by_name (abfd
, ".debug");
2962 length
= bfd_section_size (abfd
, secp
);
2966 (char *) obstack_alloc (&objfile
->objfile_obstack
, length
);
2968 if (!bfd_get_section_contents (abfd
, secp
, debugsec
,
2969 (file_ptr
) 0, length
))
2971 error (_("Error reading .debug section of `%s': %s"),
2972 name
, bfd_errmsg (bfd_get_error ()));
2976 ((struct coff_symfile_info
*)
2977 objfile
->deprecated_sym_private
)->debugsec
2982 /* Read the symbols. We keep them in core because we will want to
2983 access them randomly in read_symbol*. */
2984 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2986 error (_("Error reading symbols from %s: %s"),
2987 name
, bfd_errmsg (bfd_get_error ()));
2988 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2989 ((struct coff_symfile_info
*) objfile
->deprecated_sym_private
)->symtbl
=
2990 obstack_alloc (&objfile
->objfile_obstack
, size
);
2991 ((struct coff_symfile_info
*)
2992 objfile
->deprecated_sym_private
)->symtbl_num_syms
2995 val
= bfd_bread (((struct coff_symfile_info
*)
2996 objfile
->deprecated_sym_private
)->symtbl
,
2999 perror_with_name (_("reading symbol table"));
3001 /* If we are reinitializing, or if we have never loaded syms yet, init. */
3002 if (objfile
->global_psymbols
.size
== 0 && objfile
->static_psymbols
.size
== 0)
3003 /* I'm not sure how how good num_symbols is; the rule of thumb in
3004 init_psymbol_list was developed for a.out. On the one hand,
3005 num_symbols includes auxents. On the other hand, it doesn't
3007 init_psymbol_list (objfile
, num_symbols
);
3009 free_pending_blocks ();
3010 back_to
= make_cleanup (really_free_pendings
, 0);
3012 init_minimal_symbol_collection ();
3013 make_cleanup_discard_minimal_symbols ();
3015 /* Now that the symbol table data of the executable file are all in core,
3016 process them and define symbols accordingly. */
3018 scan_xcoff_symtab (objfile
);
3020 /* Install any minimal symbols that have been collected as the current
3021 minimal symbols for this objfile. */
3023 install_minimal_symbols (objfile
);
3025 do_cleanups (back_to
);
3029 xcoff_symfile_offsets (struct objfile
*objfile
,
3030 struct section_addr_info
*addrs
)
3032 asection
*sect
= NULL
;
3035 objfile
->num_sections
= bfd_count_sections (objfile
->obfd
);
3036 objfile
->section_offsets
= (struct section_offsets
*)
3037 obstack_alloc (&objfile
->objfile_obstack
,
3038 SIZEOF_N_SECTION_OFFSETS (objfile
->num_sections
));
3040 /* Initialize the section indexes for future use. */
3041 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
3043 objfile
->sect_index_text
= sect
->index
;
3045 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
3047 objfile
->sect_index_data
= sect
->index
;
3049 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
3051 objfile
->sect_index_bss
= sect
->index
;
3053 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
3055 objfile
->sect_index_rodata
= sect
->index
;
3057 for (i
= 0; i
< objfile
->num_sections
; ++i
)
3059 /* syms_from_objfile kindly subtracts from addr the
3060 bfd_section_vma of the .text section. This strikes me as
3061 wrong--whether the offset to be applied to symbol reading is
3062 relative to the start address of the section depends on the
3063 symbol format. In any event, this whole "addr" concept is
3064 pretty broken (it doesn't handle any section but .text
3065 sensibly), so just ignore the addr parameter and use 0.
3066 rs6000-nat.c will set the correct section offsets via
3067 objfile_relocate. */
3068 (objfile
->section_offsets
)->offsets
[i
] = 0;
3072 /* Register our ability to parse symbols for xcoff BFD files. */
3074 static const struct sym_fns xcoff_sym_fns
=
3077 /* It is possible that coff and xcoff should be merged as
3078 they do have fundamental similarities (for example, the extra storage
3079 classes used for stabs could presumably be recognized in any COFF file).
3080 However, in addition to obvious things like all the csect hair, there are
3081 some subtler differences between xcoffread.c and coffread.c, notably
3082 the fact that coffread.c has no need to read in all the symbols, but
3083 xcoffread.c reads all the symbols and does in fact randomly access them
3084 (in C_BSTAT and line number processing). */
3086 bfd_target_xcoff_flavour
,
3088 xcoff_new_init
, /* init anything gbl to entire symtab */
3089 xcoff_symfile_init
, /* read initial info, setup for sym_read() */
3090 xcoff_initial_scan
, /* read a symbol file into symtab */
3091 NULL
, /* sym_read_psymbols */
3092 xcoff_symfile_finish
, /* finished with file, cleanup */
3093 xcoff_symfile_offsets
, /* xlate offsets ext->int form */
3094 default_symfile_segments
, /* Get segment information from a file. */
3095 aix_process_linenos
,
3096 default_symfile_relocate
, /* Relocate a debug section. */
3100 /* Provide a prototype to silence -Wmissing-prototypes. */
3101 extern initialize_file_ftype _initialize_xcoffread
;
3104 _initialize_xcoffread (void)
3106 add_symtab_fns (&xcoff_sym_fns
);