1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
3 Free Software Foundation, Inc.
4 Derived from coffread.c, dbxread.c, and a lot of hacking.
5 Contributed by IBM Corporation.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 /* RS/6000 and PowerPC only:
24 Needs xcoff_add_toc_to_loadinfo and xcoff_init_loadinfo in
25 rs6000-tdep.c from target.
26 However, if you define FAKING_RS6000, then this code will link with
32 #include <sys/types.h>
35 #include "gdb_string.h"
37 #include <sys/param.h>
43 #include "coff/internal.h"
44 #include "libcoff.h" /* FIXME, internal data from BFD */
45 #include "coff/rs6000.h"
52 #include "stabsread.h"
53 #include "expression.h"
54 #include "language.h" /* Needed inside partial-stab.h */
55 #include "complaints.h"
57 #include "gdb-stabs.h"
59 /* For interface with stabsread.c. */
60 #include "aout/stab_gnu.h"
62 /* For interface with partial-stab.h. */
63 #define N_UNDF 0 /* Undefined symbol */
66 #define N_TEXT 4 /* Text sym -- defined at offset in text seg */
67 #define N_DATA 6 /* Data sym -- defined at offset in data seg */
68 #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */
69 #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */
70 #define N_FN 0x1f /* File name of .o file */
71 #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */
72 /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
73 N_DATA, or N_BSS. When the low-order bit of other types is set,
74 (e.g. N_WARNING versus N_FN), they are two different types. */
75 #define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */
78 /* The following symbols refer to set elements.
79 All the N_SET[ATDB] symbols with the same name form one set.
80 Space is allocated for the set in the text section, and each set
81 elements value is stored into one word of the space.
82 The first word of the space is the length of the set (number of elements).
84 The address of the set is made into an N_SETV symbol
85 whose name is the same as the name of the set.
86 This symbol acts like a N_DATA global symbol
87 in that it can satisfy undefined external references. */
89 /* These appear as input to LD, in a .o file. */
90 #define N_SETA 0x14 /* Absolute set element symbol */
91 #define N_SETT 0x16 /* Text set element symbol */
92 #define N_SETD 0x18 /* Data set element symbol */
93 #define N_SETB 0x1A /* Bss set element symbol */
95 /* This is output from LD. */
96 #define N_SETV 0x1C /* Pointer to set vector in data area. */
98 /* We put a pointer to this structure in the read_symtab_private field
103 /* First symbol number for this file. */
107 /* Number of symbols in the section of the symbol table devoted to
108 this file's symbols (actually, the section bracketed may contain
109 more than just this file's symbols). If numsyms is 0, the only
110 reason for this thing's existence is the dependency list. Nothing
111 else will happen when it is read in. */
115 /* Position of the start of the line number information for this psymtab. */
116 unsigned int lineno_off
;
119 /* Remember what we deduced to be the source language of this psymtab. */
121 static enum language psymtab_language
= language_unknown
;
124 /* Simplified internal version of coff symbol table information */
128 int c_symnum
; /* symbol number of this entry */
129 int c_naux
; /* 0 if syment only, 1 if syment + auxent */
131 unsigned char c_sclass
;
136 /* last function's saved coff symbol `cs' */
138 static struct coff_symbol fcn_cs_saved
;
140 static bfd
*symfile_bfd
;
142 /* Core address of start and end of text of current source file.
143 This is calculated from the first function seen after a C_FILE
147 static CORE_ADDR cur_src_end_addr
;
149 /* Core address of the end of the first object file. */
151 static CORE_ADDR first_object_file_end
;
153 /* initial symbol-table-debug-string vector length */
155 #define INITIAL_STABVECTOR_LENGTH 40
157 /* Nonzero if within a function (so symbols should be local,
158 if nothing says specifically). */
162 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
163 there is any reason not to just use a #define, but might as well
164 ask BFD for the size and store it here, I guess. */
166 static unsigned local_symesz
;
168 struct coff_symfile_info
{
169 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
170 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
172 /* Pointer to the string table. */
175 /* Pointer to debug section. */
178 /* Pointer to the a.out symbol table. */
181 /* Number of symbols in symtbl. */
185 static struct complaint storclass_complaint
=
186 {"Unexpected storage class: %d", 0, 0};
188 static struct complaint bf_notfound_complaint
=
189 {"line numbers off, `.bf' symbol not found", 0, 0};
191 static struct complaint ef_complaint
=
192 {"Mismatched .ef symbol ignored starting at symnum %d", 0, 0};
194 static struct complaint eb_complaint
=
195 {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};
198 enter_line_range
PARAMS ((struct subfile
*, unsigned, unsigned,
199 CORE_ADDR
, CORE_ADDR
, unsigned *));
202 init_stringtab
PARAMS ((bfd
*, file_ptr
, struct objfile
*));
205 xcoff_symfile_init
PARAMS ((struct objfile
*));
208 xcoff_new_init
PARAMS ((struct objfile
*));
211 xcoff_symfile_finish
PARAMS ((struct objfile
*));
213 static struct section_offsets
*
214 xcoff_symfile_offsets
PARAMS ((struct objfile
*, CORE_ADDR
));
217 find_linenos
PARAMS ((bfd
*, sec_ptr
, PTR
));
220 coff_getfilename
PARAMS ((union internal_auxent
*, struct objfile
*));
223 read_symbol
PARAMS ((struct internal_syment
*, int));
226 read_symbol_lineno
PARAMS ((int));
229 read_symbol_nvalue
PARAMS ((int));
231 static struct symbol
*
232 process_xcoff_symbol
PARAMS ((struct coff_symbol
*, struct objfile
*));
235 read_xcoff_symtab
PARAMS ((struct partial_symtab
*));
238 add_stab_to_list
PARAMS ((char *, struct pending_stabs
**));
241 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
243 static int secnum_to_section
PARAMS ((int, struct objfile
*));
245 struct find_targ_sec_arg
{
250 static void find_targ_sec
PARAMS ((bfd
*, asection
*, void *));
252 static void find_targ_sec (abfd
, sect
, obj
)
257 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*)obj
;
258 if (sect
->target_index
== args
->targ_index
)
260 /* This is the section. Figure out what SECT_OFF_* code it is. */
261 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
262 *args
->resultp
= SECT_OFF_TEXT
;
263 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
264 *args
->resultp
= SECT_OFF_DATA
;
266 *args
->resultp
= SECT_OFF_BSS
;
270 /* Return the section number (SECT_OFF_*) that CS points to. */
272 secnum_to_section (secnum
, objfile
)
274 struct objfile
*objfile
;
276 int off
= SECT_OFF_TEXT
;
277 struct find_targ_sec_arg args
;
278 args
.targ_index
= secnum
;
280 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
284 /* add a given stab string into given stab vector. */
287 add_stab_to_list (stabname
, stabvector
)
289 struct pending_stabs
**stabvector
;
291 if ( *stabvector
== NULL
) {
292 *stabvector
= (struct pending_stabs
*)
293 xmalloc (sizeof (struct pending_stabs
) +
294 INITIAL_STABVECTOR_LENGTH
* sizeof (char*));
295 (*stabvector
)->count
= 0;
296 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
298 else if ((*stabvector
)->count
>= (*stabvector
)->length
) {
299 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
300 *stabvector
= (struct pending_stabs
*)
301 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
302 (*stabvector
)->length
* sizeof (char*));
304 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
307 /* Linenos are processed on a file-by-file basis.
311 1) xlc (IBM's native c compiler) postpones static function code
312 emission to the end of a compilation unit. This way it can
313 determine if those functions (statics) are needed or not, and
314 can do some garbage collection (I think). This makes line
315 numbers and corresponding addresses unordered, and we end up
316 with a line table like:
333 and that breaks gdb's binary search on line numbers, if the
334 above table is not sorted on line numbers. And that sort
335 should be on function based, since gcc can emit line numbers
338 10 0x100 - for the init/test part of a for stmt.
341 10 0x400 - for the increment part of a for stmt.
343 arrange_linetable() will do this sorting.
345 2) aix symbol table might look like:
347 c_file // beginning of a new file
348 .bi // beginning of include file
349 .ei // end of include file
353 basically, .bi/.ei pairs do not necessarily encapsulate
354 their scope. They need to be recorded, and processed later
355 on when we come the end of the compilation unit.
356 Include table (inclTable) and process_linenos() handle
359 /* compare line table entry addresses. */
362 compare_lte (lte1
, lte2
)
363 struct linetable_entry
*lte1
, *lte2
;
365 return lte1
->pc
- lte2
->pc
;
368 /* Give a line table with function entries are marked, arrange its functions
369 in assending order and strip off function entry markers and return it in
370 a newly created table. If the old one is good enough, return the old one. */
371 /* FIXME: I think all this stuff can be replaced by just passing
372 sort_linevec = 1 to end_symtab. */
374 static struct linetable
*
375 arrange_linetable (oldLineTb
)
376 struct linetable
*oldLineTb
; /* old linetable */
379 newline
, /* new line count */
380 function_count
; /* # of functions */
382 struct linetable_entry
*fentry
; /* function entry vector */
383 int fentry_size
; /* # of function entries */
384 struct linetable
*newLineTb
; /* new line table */
386 #define NUM_OF_FUNCTIONS 20
388 fentry_size
= NUM_OF_FUNCTIONS
;
389 fentry
= (struct linetable_entry
*)
390 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
392 for (function_count
=0, ii
=0; ii
<oldLineTb
->nitems
; ++ii
) {
394 if (oldLineTb
->item
[ii
].line
== 0) { /* function entry found. */
396 if (function_count
>= fentry_size
) { /* make sure you have room. */
398 fentry
= (struct linetable_entry
*)
399 xrealloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
401 fentry
[function_count
].line
= ii
;
402 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
407 if (function_count
== 0) {
411 else if (function_count
> 1)
412 qsort (fentry
, function_count
, sizeof(struct linetable_entry
), compare_lte
);
414 /* allocate a new line table. */
415 newLineTb
= (struct linetable
*)
417 (sizeof (struct linetable
) +
418 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
420 /* if line table does not start with a function beginning, copy up until
424 if (oldLineTb
->item
[0].line
!= 0)
426 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
427 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
429 /* Now copy function lines one by one. */
431 for (ii
=0; ii
< function_count
; ++ii
) {
432 for (jj
= fentry
[ii
].line
+ 1;
433 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
435 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
438 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
442 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
443 following `IncludeChain'. At the end of each symtab (end_symtab),
444 we will determine if we should create additional symtab's to
445 represent if (the include files. */
448 typedef struct _inclTable
{
449 char *name
; /* include filename */
451 /* Offsets to the line table. end points to the last entry which is
452 part of this include file. */
455 struct subfile
*subfile
;
456 unsigned funStartLine
; /* start line # of its function */
459 #define INITIAL_INCLUDE_TABLE_LENGTH 20
460 static InclTable
*inclTable
; /* global include table */
461 static int inclIndx
; /* last entry to table */
462 static int inclLength
; /* table length */
463 static int inclDepth
; /* nested include depth */
465 static void allocate_include_entry
PARAMS ((void));
468 record_include_begin (cs
)
469 struct coff_symbol
*cs
;
473 /* In xcoff, we assume include files cannot be nested (not in .c files
474 of course, but in corresponding .s files.). */
476 /* This can happen with old versions of GCC.
477 GCC 2.3.3-930426 does not exhibit this on a test case which
478 a user said produced the message for him. */
479 static struct complaint msg
= {"Nested C_BINCL symbols", 0, 0};
484 allocate_include_entry ();
486 inclTable
[inclIndx
].name
= cs
->c_name
;
487 inclTable
[inclIndx
].begin
= cs
->c_value
;
491 record_include_end (cs
)
492 struct coff_symbol
*cs
;
498 static struct complaint msg
= {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
502 allocate_include_entry ();
504 pTbl
= &inclTable
[inclIndx
];
505 pTbl
->end
= cs
->c_value
;
512 allocate_include_entry ()
514 if (inclTable
== NULL
)
516 inclTable
= (InclTable
*)
517 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
519 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
520 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
523 else if (inclIndx
>= inclLength
)
525 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
526 inclTable
= (InclTable
*)
527 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
528 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
529 '\0', sizeof (InclTable
)*INITIAL_INCLUDE_TABLE_LENGTH
);
533 /* Global variable to pass the psymtab down to all the routines involved
534 in psymtab to symtab processing. */
535 static struct partial_symtab
*this_symtab_psymtab
;
537 /* given the start and end addresses of a compilation unit (or a csect,
538 at times) process its lines and create appropriate line vectors. */
541 process_linenos (start
, end
)
542 CORE_ADDR start
, end
;
545 file_ptr max_offset
=
546 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
549 /* subfile structure for the main compilation unit. */
550 struct subfile main_subfile
;
552 /* In the main source file, any time we see a function entry, we
553 reset this variable to function's absolute starting line number.
554 All the following line numbers in the function are relative to
555 this, and we record absolute line numbers in record_line(). */
557 unsigned int main_source_baseline
= 0;
562 ((struct symloc
*)this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
564 goto return_after_cleanup
;
566 memset (&main_subfile
, '\0', sizeof (main_subfile
));
569 /* All source lines were in the main source file. None in include files. */
571 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
572 &main_source_baseline
);
576 /* There was source with line numbers in include files. */
577 main_source_baseline
= 0;
578 for (ii
=0; ii
< inclIndx
; ++ii
)
580 struct subfile
*tmpSubfile
;
582 /* If there is main file source before include file, enter it. */
583 if (offset
< inclTable
[ii
].begin
)
586 (&main_subfile
, offset
, inclTable
[ii
].begin
- LINESZ
,
587 start
, 0, &main_source_baseline
);
590 /* Have a new subfile for the include file. */
592 tmpSubfile
= inclTable
[ii
].subfile
=
593 (struct subfile
*) xmalloc (sizeof (struct subfile
));
595 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
596 firstLine
= &(inclTable
[ii
].funStartLine
);
598 /* Enter include file's lines now. */
599 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
600 inclTable
[ii
].end
, start
, 0, firstLine
);
602 if (offset
<= inclTable
[ii
].end
)
603 offset
= inclTable
[ii
].end
+ LINESZ
;
606 /* All the include files' line have been processed at this point. Now,
607 enter remaining lines of the main file, if any left. */
608 if (offset
< max_offset
+ 1 - LINESZ
)
610 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
611 &main_source_baseline
);
615 /* Process main file's line numbers. */
616 if (main_subfile
.line_vector
)
618 struct linetable
*lineTb
, *lv
;
620 lv
= main_subfile
.line_vector
;
622 /* Line numbers are not necessarily ordered. xlc compilation will
623 put static function to the end. */
625 lineTb
= arrange_linetable (lv
);
628 current_subfile
->line_vector
= (struct linetable
*)
629 xrealloc (lv
, (sizeof (struct linetable
)
630 + lv
->nitems
* sizeof (struct linetable_entry
)));
635 current_subfile
->line_vector
= lineTb
;
638 current_subfile
->line_vector_length
=
639 current_subfile
->line_vector
->nitems
;
642 /* Now, process included files' line numbers. */
644 for (ii
=0; ii
< inclIndx
; ++ii
)
646 if ((inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!! FIXMEmgo */
648 struct linetable
*lineTb
, *lv
;
650 lv
= (inclTable
[ii
].subfile
)->line_vector
;
652 /* Line numbers are not necessarily ordered. xlc compilation will
653 put static function to the end. */
655 lineTb
= arrange_linetable (lv
);
659 /* For the same include file, we might want to have more than one
660 subfile. This happens if we have something like:
668 while foo.h including code in it. (stupid but possible)
669 Since start_subfile() looks at the name and uses an
670 existing one if finds, we need to provide a fake name and
674 start_subfile (inclTable
[ii
].name
, (char*)0);
677 /* Pick a fake name that will produce the same results as this
678 one when passed to deduce_language_from_filename. Kludge on
680 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
681 if (fakename
== NULL
)
683 start_subfile (fakename
, (char*)0);
684 free (current_subfile
->name
);
686 current_subfile
->name
= strdup (inclTable
[ii
].name
);
691 current_subfile
->line_vector
=
692 (struct linetable
*) xrealloc
693 (lv
, (sizeof (struct linetable
)
694 + lv
->nitems
* sizeof (struct linetable_entry
)));
700 current_subfile
->line_vector
= lineTb
;
703 current_subfile
->line_vector_length
=
704 current_subfile
->line_vector
->nitems
;
705 start_subfile (pop_subfile (), (char*)0);
709 return_after_cleanup
:
711 /* We don't want to keep alloc/free'ing the global include file table. */
714 /* Start with a fresh subfile structure for the next file. */
715 memset (&main_subfile
, '\0', sizeof (struct subfile
));
719 aix_process_linenos ()
721 /* process line numbers and enter them into line vector */
722 process_linenos (last_source_start_addr
, cur_src_end_addr
);
726 /* Enter a given range of lines into the line vector.
727 can be called in the following two ways:
728 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
729 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
731 endoffset points to the last line table entry that we should pay
735 enter_line_range (subfile
, beginoffset
, endoffset
, startaddr
, endaddr
,
737 struct subfile
*subfile
;
738 unsigned beginoffset
, endoffset
; /* offsets to line table */
739 CORE_ADDR startaddr
, endaddr
;
742 unsigned int curoffset
;
744 struct external_lineno ext_lnno
;
745 struct internal_lineno int_lnno
;
746 unsigned int limit_offset
;
749 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
751 curoffset
= beginoffset
;
753 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
758 if (endoffset
>= limit_offset
)
760 static struct complaint msg
=
761 {"Bad line table offset in C_EINCL directive", 0, 0};
765 limit_offset
= endoffset
;
769 abfd
= this_symtab_psymtab
->objfile
->obfd
;
771 while (curoffset
<= limit_offset
)
773 bfd_seek (abfd
, curoffset
, SEEK_SET
);
774 bfd_read (&ext_lnno
, sizeof (struct external_lineno
), 1, abfd
);
775 bfd_coff_swap_lineno_in (abfd
, &ext_lnno
, &int_lnno
);
777 /* Find the address this line represents. */
778 addr
= (int_lnno
.l_lnno
779 ? int_lnno
.l_addr
.l_paddr
780 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
781 addr
+= ANOFFSET (this_symtab_psymtab
->objfile
->section_offsets
,
784 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
787 if (int_lnno
.l_lnno
== 0)
789 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
790 record_line (subfile
, 0, addr
);
794 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
, addr
);
800 /* Save the vital information for use when closing off the current file.
801 NAME is the file name the symbols came from, START_ADDR is the first
802 text address for the file, and SIZE is the number of bytes of text. */
804 #define complete_symtab(name, start_addr) { \
805 last_source_file = savestring (name, strlen (name)); \
806 last_source_start_addr = start_addr; \
810 /* Refill the symbol table input buffer
811 and set the variables that control fetching entries from it.
812 Reports an error if no data available.
813 This function can read past the end of the symbol table
814 (into the string table) but this does no harm. */
816 /* Reading symbol table has to be fast! Keep the followings as macros, rather
819 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
823 if (namestr[0] == '.') ++namestr; \
824 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
825 (char *)NULL, (SECTION), (OBJFILE)); \
826 misc_func_recorded = 1; \
830 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
831 nested. At any given time, a symbol can only be in one static block.
832 This is the base address of current static block, zero if non exists. */
834 static int static_block_base
= 0;
836 /* Section number for the current static block. */
838 static int static_block_section
= -1;
840 /* true if space for symbol name has been allocated. */
842 static int symname_alloced
= 0;
844 /* Next symbol to read. Pointer into raw seething symbol table. */
846 static char *raw_symbol
;
848 /* This is the function which stabsread.c calls to get symbol
851 xcoff_next_symbol_text ()
853 struct internal_syment symbol
;
854 static struct complaint msg
=
855 {"Unexpected symbol continuation", 0, 0};
857 struct objfile
*objfile
= this_symtab_psymtab
->objfile
;
859 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
864 /* Return something which points to '\0' and hope the symbol reading
865 code does something reasonable. */
868 else if (symbol
.n_sclass
& 0x80)
871 ((struct coff_symfile_info
*)objfile
->sym_private
)->debugsec
874 coff_data (objfile
->obfd
)->local_symesz
;
881 /* Return something which points to '\0' and hope the symbol reading
882 code does something reasonable. */
888 /* Read symbols for a given partial symbol table. */
891 read_xcoff_symtab (pst
)
892 struct partial_symtab
*pst
;
894 struct objfile
*objfile
= pst
->objfile
;
895 bfd
*abfd
= objfile
->obfd
;
896 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
897 char *strtbl
= ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
;
899 ((struct coff_symfile_info
*)objfile
->sym_private
)->debugsec
;
901 struct internal_syment symbol
[1];
902 union internal_auxent main_aux
;
903 struct coff_symbol cs
[1];
904 CORE_ADDR file_start_addr
= 0;
905 CORE_ADDR file_end_addr
= 0;
907 int next_file_symnum
= -1;
908 unsigned int max_symnum
;
909 int just_started
= 1;
911 int fcn_start_addr
= 0;
913 struct coff_symbol fcn_stab_saved
;
915 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
916 union internal_auxent fcn_aux_saved
;
917 struct context_stack
*new;
919 char *filestring
= " _start_ "; /* Name of the current file. */
921 char *last_csect_name
; /* last seen csect's name and value */
922 CORE_ADDR last_csect_val
;
925 this_symtab_psymtab
= pst
;
927 /* Get the appropriate COFF "constants" related to the file we're
929 local_symesz
= coff_data (abfd
)->local_symesz
;
931 last_source_file
= NULL
;
936 start_symtab (filestring
, (char *)NULL
, file_start_addr
);
937 symnum
= ((struct symloc
*)pst
->read_symtab_private
)->first_symnum
;
939 symnum
+ ((struct symloc
*)pst
->read_symtab_private
)->numsyms
;
940 first_object_file_end
= 0;
943 ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
944 + symnum
* local_symesz
;
946 while (symnum
< max_symnum
)
949 QUIT
; /* make this command interruptable. */
951 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
952 /* read one symbol into `cs' structure. After processing the
953 whole symbol table, only string table will be kept in memory,
954 symbol table and debug section of xcoff will be freed. Thus
955 we can mark symbols with names in string table as
960 /* Swap and align the symbol into a reasonable C structure. */
961 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
963 cs
->c_symnum
= symnum
;
964 cs
->c_naux
= symbol
->n_numaux
;
965 if (symbol
->n_zeroes
)
968 /* We must use the original, unswapped, name here so the name field
969 pointed to by cs->c_name will persist throughout xcoffread. If
970 we use the new field, it gets overwritten for each symbol. */
971 cs
->c_name
= ((struct external_syment
*)raw_symbol
)->e
.e_name
;
972 /* If it's exactly E_SYMNMLEN characters long it isn't
974 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
977 p
= obstack_alloc (&objfile
->symbol_obstack
, E_SYMNMLEN
+ 1);
978 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
979 p
[E_SYMNMLEN
] = '\0';
984 else if (symbol
->n_sclass
& 0x80)
986 cs
->c_name
= debugsec
+ symbol
->n_offset
;
991 /* in string table */
992 cs
->c_name
= strtbl
+ (int)symbol
->n_offset
;
995 cs
->c_value
= symbol
->n_value
;
996 cs
->c_sclass
= symbol
->n_sclass
;
997 cs
->c_secnum
= symbol
->n_scnum
;
998 cs
->c_type
= (unsigned)symbol
->n_type
;
1000 raw_symbol
+= coff_data (abfd
)->local_symesz
;
1003 /* Save addr of first aux entry. */
1004 raw_auxptr
= raw_symbol
;
1006 /* Skip all the auxents associated with this symbol. */
1007 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1009 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1014 /* if symbol name starts with ".$" or "$", ignore it. */
1015 if (cs
->c_name
[0] == '$'
1016 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1019 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1021 if (last_source_file
)
1024 end_symtab (cur_src_end_addr
, 1, 0, objfile
, SECT_OFF_TEXT
);
1029 start_symtab ("_globals_", (char *)NULL
, (CORE_ADDR
)0);
1030 cur_src_end_addr
= first_object_file_end
;
1031 /* done with all files, everything from here on is globals */
1034 /* if explicitly specified as a function, treat is as one. */
1035 if (ISFCN(cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1037 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1038 0, cs
->c_naux
, &main_aux
);
1039 goto function_entry_point
;
1042 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1045 /* Dealing with a symbol with a csect entry. */
1047 #define CSECT(PP) ((PP)->x_csect)
1048 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1049 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1050 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1051 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1053 /* Convert the auxent to something we can access. */
1054 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1055 0, cs
->c_naux
, &main_aux
);
1057 switch (CSECT_SMTYP (&main_aux
))
1061 /* Ignore all external references. */
1065 /* A section description. */
1067 switch (CSECT_SCLAS (&main_aux
))
1073 /* A program csect is seen. We have to allocate one
1074 symbol table for each program csect. Normally gdb
1075 prefers one symtab for each source file. In case
1076 of AIX, one source file might include more than one
1077 [PR] csect, and they don't have to be adjacent in
1078 terms of the space they occupy in memory. Thus, one
1079 single source file might get fragmented in the
1080 memory and gdb's file start and end address
1081 approach does not work! GCC (and I think xlc) seem
1082 to put all the code in the unnamed program csect. */
1084 if (last_csect_name
)
1086 complete_symtab (filestring
, file_start_addr
);
1087 cur_src_end_addr
= file_end_addr
;
1088 end_symtab (file_end_addr
, 1, 0, objfile
,
1092 /* Give all csects for this source file the same
1094 start_symtab (filestring
, NULL
, (CORE_ADDR
)0);
1097 /* If this is the very first csect seen,
1098 basically `__start'. */
1101 first_object_file_end
1102 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1107 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1109 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1111 if (cs
->c_name
&& cs
->c_name
[0] == '.')
1113 last_csect_name
= cs
->c_name
;
1114 last_csect_val
= cs
->c_value
;
1115 last_csect_sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1120 /* All other symbols are put into the minimal symbol
1133 /* Ignore the symbol. */
1141 switch (CSECT_SCLAS (&main_aux
))
1144 /* a function entry point. */
1145 function_entry_point
:
1147 fcn_start_addr
= cs
->c_value
;
1149 /* save the function header info, which will be used
1150 when `.bf' is seen. */
1152 fcn_aux_saved
= main_aux
;
1156 /* shared library function trampoline code entry point. */
1160 /* The symbols often have the same names as debug symbols for
1161 functions, and confuse lookup_symbol. */
1165 /* xlc puts each variable in a separate csect, so we get
1166 an XTY_SD for each variable. But gcc puts several
1167 variables in a csect, so that each variable only gets
1168 an XTY_LD. This will typically be XMC_RW; I suspect
1169 XMC_RO and XMC_BS might be possible too.
1170 These variables are put in the minimal symbol table
1177 /* Common symbols are put into the minimal symbol table only. */
1185 switch (cs
->c_sclass
)
1190 /* c_value field contains symnum of next .file entry in table
1191 or symnum of first global after last .file. */
1193 next_file_symnum
= cs
->c_value
;
1195 /* Complete symbol table for last object file containing
1196 debugging information. */
1198 /* Whether or not there was a csect in the previous file, we
1199 have to call `end_stabs' and `start_stabs' to reset
1200 type_vector, line_vector, etc. structures. */
1202 complete_symtab (filestring
, file_start_addr
);
1203 cur_src_end_addr
= file_end_addr
;
1204 end_symtab (file_end_addr
, 1, 0, objfile
, SECT_OFF_TEXT
);
1207 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1208 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1209 standard COFF way and put it in the auxent. We use the auxent if
1210 the symbol is ".file" and an auxent exists, otherwise use the symbol
1211 itself. Simple enough. */
1212 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1214 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1215 0, cs
->c_naux
, &main_aux
);
1216 filestring
= coff_getfilename (&main_aux
, objfile
);
1219 filestring
= cs
->c_name
;
1222 start_symtab (filestring
, (char *)NULL
, (CORE_ADDR
)0);
1223 last_csect_name
= 0;
1225 /* reset file start and end addresses. A compilation unit with no text
1226 (only data) should have zero file boundaries. */
1227 file_start_addr
= file_end_addr
= 0;
1231 fcn_stab_saved
= *cs
;
1235 if (STREQ (cs
->c_name
, ".bf"))
1237 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1239 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1240 0, cs
->c_naux
, &main_aux
);
1242 within_function
= 1;
1244 new = push_context (0, fcn_start_addr
+ off
);
1246 new->name
= define_symbol
1247 (fcn_cs_saved
.c_value
+ off
,
1248 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1249 if (new->name
!= NULL
)
1250 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT
;
1252 else if (STREQ (cs
->c_name
, ".ef"))
1255 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1256 0, cs
->c_naux
, &main_aux
);
1258 /* The value of .ef is the address of epilogue code;
1259 not useful for gdb. */
1260 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1261 contains number of lines to '}' */
1263 if (context_stack_depth
<= 0)
1264 { /* We attempted to pop an empty context stack */
1265 complain (&ef_complaint
, cs
->c_symnum
);
1266 within_function
= 0;
1269 new = pop_context ();
1270 /* Stack must be empty now. */
1271 if (context_stack_depth
> 0 || new == NULL
)
1273 complain (&ef_complaint
, cs
->c_symnum
);
1274 within_function
= 0;
1278 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1280 (fcn_cs_saved
.c_value
1281 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1282 + ANOFFSET (objfile
->section_offsets
,
1285 within_function
= 0;
1290 /* Begin static block. */
1292 struct internal_syment symbol
;
1294 read_symbol (&symbol
, cs
->c_value
);
1295 static_block_base
= symbol
.n_value
;
1296 static_block_section
=
1297 secnum_to_section (symbol
.n_scnum
, objfile
);
1302 /* End of static block. */
1303 static_block_base
= 0;
1304 static_block_section
= -1;
1315 static struct complaint msg
=
1316 {"Unrecognized storage class %d.", 0, 0};
1317 complain (&msg
, cs
->c_sclass
);
1331 /* beginning of include file */
1332 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1333 order. Thus, when wee see them, we might not know enough info
1334 to process them. Thus, we'll be saving them into a table
1335 (inclTable) and postpone their processing. */
1337 record_include_begin (cs
);
1341 /* End of include file. */
1342 /* See the comment after case C_BINCL. */
1343 record_include_end (cs
);
1347 if (STREQ (cs
->c_name
, ".bb"))
1350 new = push_context (depth
,
1352 + ANOFFSET (objfile
->section_offsets
,
1355 else if (STREQ (cs
->c_name
, ".eb"))
1357 if (context_stack_depth
<= 0)
1358 { /* We attempted to pop an empty context stack */
1359 complain (&eb_complaint
, cs
->c_symnum
);
1362 new = pop_context ();
1363 if (depth
-- != new->depth
)
1365 complain (&eb_complaint
, cs
->c_symnum
);
1368 if (local_symbols
&& context_stack_depth
> 0)
1370 /* Make a block for the local symbols within. */
1371 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1374 + ANOFFSET (objfile
->section_offsets
,
1378 local_symbols
= new->locals
;
1383 process_xcoff_symbol (cs
, objfile
);
1388 if (last_source_file
)
1392 complete_symtab (filestring
, file_start_addr
);
1393 cur_src_end_addr
= file_end_addr
;
1394 s
= end_symtab (file_end_addr
, 1, 0, objfile
, SECT_OFF_TEXT
);
1395 /* When reading symbols for the last C_FILE of the objfile, try
1396 to make sure that we set pst->symtab to the symtab for the
1397 file, not to the _globals_ symtab. I'm not sure whether this
1398 actually works right or when/if it comes up. */
1399 if (pst
->symtab
== NULL
)
1405 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1406 (SYMBOL2) = (struct symbol *) \
1407 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1408 *(SYMBOL2) = *(SYMBOL1);
1411 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1412 (ALLOCED) ? (NAME) : obstack_copy0 (&objfile->symbol_obstack, (NAME), strlen (NAME));
1415 static struct type
*func_symbol_type
;
1416 static struct type
*var_symbol_type
;
1418 /* process one xcoff symbol. */
1420 static struct symbol
*
1421 process_xcoff_symbol (cs
, objfile
)
1422 register struct coff_symbol
*cs
;
1423 struct objfile
*objfile
;
1425 struct symbol onesymbol
;
1426 register struct symbol
*sym
= &onesymbol
;
1427 struct symbol
*sym2
= NULL
;
1433 if (cs
->c_secnum
< 0)
1435 /* The value is a register number, offset within a frame, etc.,
1436 and does not get relocated. */
1442 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1443 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1450 memset (sym
, '\0', sizeof (struct symbol
));
1452 /* default assumptions */
1453 SYMBOL_VALUE (sym
) = cs
->c_value
+ off
;
1454 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1455 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1457 if (ISFCN (cs
->c_type
))
1459 /* At this point, we don't know the type of the function. This
1460 will be patched with the type from its stab entry later on in
1461 patch_block_stabs (), unless the file was compiled without -g. */
1463 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1464 SYMBOL_TYPE (sym
) = func_symbol_type
;
1466 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1467 SYMBOL_DUP (sym
, sym2
);
1469 if (cs
->c_sclass
== C_EXT
)
1470 add_symbol_to_list (sym2
, &global_symbols
);
1471 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1472 add_symbol_to_list (sym2
, &file_symbols
);
1476 /* In case we can't figure out the type, provide default. */
1477 SYMBOL_TYPE (sym
) = var_symbol_type
;
1479 switch (cs
->c_sclass
)
1482 /* The values of functions and global symbols are now resolved
1483 via the global_sym_chain in stabsread.c. */
1485 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1486 add_stab_to_list (name
, &global_stabs
);
1488 add_stab_to_list (name
, &file_stabs
);
1492 add_stab_to_list (name
, &global_stabs
);
1497 common_block_start (cs
->c_name
, objfile
);
1501 common_block_end (objfile
);
1505 complain (&storclass_complaint
, cs
->c_sclass
);
1517 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1520 SYMBOL_SECTION (sym
) = sec
;
1527 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1528 all statics and we need to distinguish file-scope versus
1529 function-scope using within_function. We do this by
1530 changing the string we pass to define_symbol to use 'S'
1531 where we need to, which is not necessarily super-clean,
1532 but seems workable enough. */
1534 if (*name
== ':' || (pp
= (char *) strchr(name
, ':')) == NULL
)
1538 if (*pp
== 'V' && !within_function
)
1540 sym
= define_symbol ((cs
->c_value
1541 + ANOFFSET (objfile
->section_offsets
,
1542 static_block_section
)),
1543 cs
->c_name
, 0, 0, objfile
);
1546 SYMBOL_VALUE (sym
) += static_block_base
;
1547 SYMBOL_SECTION (sym
) = static_block_section
;
1556 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1557 only the last component of the name. Result is in static storage and
1558 is only good for temporary use. */
1561 coff_getfilename (aux_entry
, objfile
)
1562 union internal_auxent
*aux_entry
;
1563 struct objfile
*objfile
;
1565 static char buffer
[BUFSIZ
];
1566 register char *temp
;
1569 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1571 ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
1572 + aux_entry
->x_file
.x_n
.x_offset
);
1575 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1576 buffer
[FILNMLEN
] = '\0';
1580 /* FIXME: We should not be throwing away the information about what
1581 directory. It should go into dirname of the symtab, or some such
1583 if ((temp
= strrchr (result
, '/')) != NULL
)
1588 /* Set *SYMBOL to symbol number symno in symtbl. */
1590 read_symbol (symbol
, symno
)
1591 struct internal_syment
*symbol
;
1595 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
1598 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
1600 if (symno
< 0 || symno
>= nsyms
)
1602 static struct complaint msg
=
1603 {"Invalid symbol offset", 0, 0};
1605 symbol
->n_value
= 0;
1606 symbol
->n_scnum
= -1;
1609 bfd_coff_swap_sym_in (this_symtab_psymtab
->objfile
->obfd
,
1610 stbl
+ (symno
*local_symesz
),
1614 /* Get value corresponding to symbol number symno in symtbl. */
1617 read_symbol_nvalue (symno
)
1620 struct internal_syment symbol
[1];
1622 read_symbol (symbol
, symno
);
1623 return symbol
->n_value
;
1627 /* Find the address of the function corresponding to symno, where
1628 symno is the symbol pointed to by the linetable. */
1631 read_symbol_lineno (symno
)
1635 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
1638 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
1640 struct internal_syment symbol
[1];
1641 union internal_auxent main_aux
[1];
1645 complain (&bf_notfound_complaint
);
1649 /* Note that just searching for a short distance (e.g. 50 symbols)
1650 is not enough, at least in the following case.
1653 [many .stabx entries]
1654 [a few functions, referring to foo]
1658 What happens here is that the assembler moves the .stabx entries
1659 to right before the ".bf" for foo, but the symbol for "foo" is before
1660 all the stabx entries. See PR gdb/2222. */
1662 /* Maintaining a table of .bf entries might be preferable to this search.
1663 If I understand things correctly it would need to be done only for
1664 the duration of a single psymtab to symtab conversion. */
1665 while (symno
< nsyms
)
1667 bfd_coff_swap_sym_in (symfile_bfd
,
1668 stbl
+ (symno
* local_symesz
), symbol
);
1669 if (symbol
->n_sclass
== C_FCN
&& STREQ (symbol
->n_name
, ".bf"))
1671 symno
+= symbol
->n_numaux
+ 1;
1674 complain (&bf_notfound_complaint
);
1678 /* take aux entry and return its lineno */
1680 bfd_coff_swap_aux_in (this_symtab_psymtab
->objfile
->obfd
,
1681 stbl
+ symno
* local_symesz
,
1682 symbol
->n_type
, symbol
->n_sclass
,
1683 0, symbol
->n_numaux
, main_aux
);
1685 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1688 /* Support for line number handling */
1690 /* This function is called for every section; it finds the outer limits
1691 * of the line table (minimum and maximum file offset) so that the
1692 * mainline code can read the whole thing for efficiency.
1695 find_linenos (abfd
, asect
, vpinfo
)
1700 struct coff_symfile_info
*info
;
1702 file_ptr offset
, maxoff
;
1704 count
= asect
->lineno_count
;
1706 if (!STREQ (asect
->name
, ".text") || count
== 0)
1709 size
= count
* coff_data (abfd
)->local_linesz
;
1710 info
= (struct coff_symfile_info
*)vpinfo
;
1711 offset
= asect
->line_filepos
;
1712 maxoff
= offset
+ size
;
1714 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1715 info
->min_lineno_offset
= offset
;
1717 if (maxoff
> info
->max_lineno_offset
)
1718 info
->max_lineno_offset
= maxoff
;
1721 static void xcoff_psymtab_to_symtab_1
PARAMS ((struct partial_symtab
*));
1724 xcoff_psymtab_to_symtab_1 (pst
)
1725 struct partial_symtab
*pst
;
1727 struct cleanup
*old_chain
;
1736 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1741 /* Read in all partial symtabs on which this one is dependent */
1742 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1743 if (!pst
->dependencies
[i
]->readin
)
1745 /* Inform about additional files that need to be read in. */
1748 fputs_filtered (" ", gdb_stdout
);
1750 fputs_filtered ("and ", gdb_stdout
);
1752 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1753 wrap_here (""); /* Flush output */
1754 gdb_flush (gdb_stdout
);
1756 xcoff_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1759 if (((struct symloc
*)pst
->read_symtab_private
)->numsyms
!= 0)
1761 /* Init stuff necessary for reading in symbols. */
1764 old_chain
= make_cleanup (really_free_pendings
, 0);
1766 read_xcoff_symtab (pst
);
1767 sort_symtab_syms (pst
->symtab
);
1769 do_cleanups (old_chain
);
1775 static void xcoff_psymtab_to_symtab
PARAMS ((struct partial_symtab
*));
1777 /* Read in all of the symbols for a given psymtab for real.
1778 Be verbose about it if the user wants that. */
1781 xcoff_psymtab_to_symtab (pst
)
1782 struct partial_symtab
*pst
;
1792 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1797 if (((struct symloc
*)pst
->read_symtab_private
)->numsyms
!= 0
1798 || pst
->number_of_dependencies
)
1800 /* Print the message now, before reading the string table,
1801 to avoid disconcerting pauses. */
1804 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1805 gdb_flush (gdb_stdout
);
1808 sym_bfd
= pst
->objfile
->obfd
;
1810 next_symbol_text_func
= xcoff_next_symbol_text
;
1812 xcoff_psymtab_to_symtab_1 (pst
);
1814 /* Match with global symbols. This only needs to be done once,
1815 after all of the symtabs and dependencies have been read in. */
1816 scan_file_globals (pst
->objfile
);
1818 /* Finish up the debug error message. */
1820 printf_filtered ("done.\n");
1825 xcoff_new_init (objfile
)
1826 struct objfile
*objfile
;
1828 stabsread_new_init ();
1829 buildsym_new_init ();
1832 /* Do initialization in preparation for reading symbols from OBJFILE.
1834 We will only be called if this is an XCOFF or XCOFF-like file.
1835 BFD handles figuring out the format of the file, and code in symfile.c
1836 uses BFD's determination to vector to us. */
1839 xcoff_symfile_init (objfile
)
1840 struct objfile
*objfile
;
1842 /* Allocate struct to keep track of the symfile */
1843 objfile
-> sym_private
= xmmalloc (objfile
-> md
,
1844 sizeof (struct coff_symfile_info
));
1845 init_entry_point_info (objfile
);
1848 /* Perform any local cleanups required when we are done with a particular
1849 objfile. I.E, we are in the process of discarding all symbol information
1850 for an objfile, freeing up all memory held for it, and unlinking the
1851 objfile struct from the global list of known objfiles. */
1854 xcoff_symfile_finish (objfile
)
1855 struct objfile
*objfile
;
1857 if (objfile
-> sym_private
!= NULL
)
1859 mfree (objfile
-> md
, objfile
-> sym_private
);
1862 /* Start with a fresh include table for the next objfile. */
1868 inclIndx
= inclLength
= inclDepth
= 0;
1873 init_stringtab (abfd
, offset
, objfile
)
1876 struct objfile
*objfile
;
1880 unsigned char lengthbuf
[4];
1883 ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
= NULL
;
1885 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1886 error ("cannot seek to string table in %s: %s",
1887 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1889 val
= bfd_read ((char *)lengthbuf
, 1, sizeof lengthbuf
, abfd
);
1890 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1892 /* If no string table is needed, then the file may end immediately
1893 after the symbols. Just return with `strtbl' set to NULL. */
1895 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1898 /* Allocate string table from symbol_obstack. We will need this table
1899 as long as we have its symbol table around. */
1901 strtbl
= (char *) obstack_alloc (&objfile
->symbol_obstack
, length
);
1902 ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
= strtbl
;
1904 /* Copy length buffer, the first byte is usually zero and is
1905 used for stabs with a name length of zero. */
1906 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1907 if (length
== sizeof lengthbuf
)
1910 val
= bfd_read (strtbl
+ sizeof lengthbuf
, 1, length
- sizeof lengthbuf
,
1913 if (val
!= length
- sizeof lengthbuf
)
1914 error ("cannot read string table from %s: %s",
1915 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1916 if (strtbl
[length
- 1] != '\0')
1917 error ("bad symbol file: string table does not end with null character");
1922 /* If we have not yet seen a function for this psymtab, this is 0. If we
1923 have seen one, it is the offset in the line numbers of the line numbers
1925 static unsigned int first_fun_line_offset
;
1927 static struct partial_symtab
*xcoff_start_psymtab
1928 PARAMS ((struct objfile
*, struct section_offsets
*, char *, int,
1929 struct partial_symbol
*, struct partial_symbol
*));
1931 /* Allocate and partially fill a partial symtab. It will be
1932 completely filled at the end of the symbol list.
1934 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1935 is the address relative to which its symbols are (incremental) or 0
1938 static struct partial_symtab
*
1939 xcoff_start_psymtab (objfile
, section_offsets
,
1940 filename
, first_symnum
, global_syms
, static_syms
)
1941 struct objfile
*objfile
;
1942 struct section_offsets
*section_offsets
;
1945 struct partial_symbol
*global_syms
;
1946 struct partial_symbol
*static_syms
;
1948 struct partial_symtab
*result
=
1949 start_psymtab_common (objfile
, section_offsets
,
1951 /* We fill in textlow later. */
1953 global_syms
, static_syms
);
1955 result
->read_symtab_private
= (char *)
1956 obstack_alloc (&objfile
-> psymbol_obstack
, sizeof (struct symloc
));
1957 ((struct symloc
*)result
->read_symtab_private
)->first_symnum
= first_symnum
;
1958 result
->read_symtab
= xcoff_psymtab_to_symtab
;
1960 /* Deduce the source language from the filename for this psymtab. */
1961 psymtab_language
= deduce_language_from_filename (filename
);
1966 static struct partial_symtab
*xcoff_end_psymtab
1967 PARAMS ((struct partial_symtab
*, char **, int, int,
1968 struct partial_symtab
**, int));
1970 /* Close off the current usage of PST.
1971 Returns PST, or NULL if the partial symtab was empty and thrown away.
1973 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
1975 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
1976 are the information for includes and dependencies. */
1978 static struct partial_symtab
*
1979 xcoff_end_psymtab (pst
, include_list
, num_includes
, capping_symbol_number
,
1980 dependency_list
, number_dependencies
)
1981 struct partial_symtab
*pst
;
1982 char **include_list
;
1984 int capping_symbol_number
;
1985 struct partial_symtab
**dependency_list
;
1986 int number_dependencies
;
1989 struct objfile
*objfile
= pst
-> objfile
;
1991 if (capping_symbol_number
!= -1)
1992 ((struct symloc
*)pst
->read_symtab_private
)->numsyms
=
1993 capping_symbol_number
1994 - ((struct symloc
*)pst
->read_symtab_private
)->first_symnum
;
1995 ((struct symloc
*)pst
->read_symtab_private
)->lineno_off
=
1996 first_fun_line_offset
;
1997 first_fun_line_offset
= 0;
1998 pst
->n_global_syms
=
1999 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2000 pst
->n_static_syms
=
2001 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2003 pst
->number_of_dependencies
= number_dependencies
;
2004 if (number_dependencies
)
2006 pst
->dependencies
= (struct partial_symtab
**)
2007 obstack_alloc (&objfile
->psymbol_obstack
,
2008 number_dependencies
* sizeof (struct partial_symtab
*));
2009 memcpy (pst
->dependencies
, dependency_list
,
2010 number_dependencies
* sizeof (struct partial_symtab
*));
2013 pst
->dependencies
= 0;
2015 for (i
= 0; i
< num_includes
; i
++)
2017 struct partial_symtab
*subpst
=
2018 allocate_psymtab (include_list
[i
], objfile
);
2020 subpst
->section_offsets
= pst
->section_offsets
;
2021 subpst
->read_symtab_private
=
2022 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
2023 sizeof (struct symloc
));
2024 ((struct symloc
*)subpst
->read_symtab_private
)->first_symnum
= 0;
2025 ((struct symloc
*)subpst
->read_symtab_private
)->numsyms
= 0;
2026 subpst
->textlow
= 0;
2027 subpst
->texthigh
= 0;
2029 /* We could save slight bits of space by only making one of these,
2030 shared by the entire set of include files. FIXME-someday. */
2031 subpst
->dependencies
= (struct partial_symtab
**)
2032 obstack_alloc (&objfile
->psymbol_obstack
,
2033 sizeof (struct partial_symtab
*));
2034 subpst
->dependencies
[0] = pst
;
2035 subpst
->number_of_dependencies
= 1;
2037 subpst
->globals_offset
=
2038 subpst
->n_global_syms
=
2039 subpst
->statics_offset
=
2040 subpst
->n_static_syms
= 0;
2044 subpst
->read_symtab
= pst
->read_symtab
;
2047 sort_pst_symbols (pst
);
2049 /* If there is already a psymtab or symtab for a file of this name,
2050 remove it. (If there is a symtab, more drastic things also
2051 happen.) This happens in VxWorks. */
2052 free_named_symtabs (pst
->filename
);
2054 if (num_includes
== 0
2055 && number_dependencies
== 0
2056 && pst
->n_global_syms
== 0
2057 && pst
->n_static_syms
== 0)
2059 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2060 it is on the obstack, but we can forget to chain it on the list. */
2061 /* Empty psymtabs happen as a result of header files which don't have
2062 any symbols in them. There can be a lot of them. */
2063 struct partial_symtab
*prev_pst
;
2065 /* First, snip it out of the psymtab chain */
2067 if (pst
->objfile
->psymtabs
== pst
)
2068 pst
->objfile
->psymtabs
= pst
->next
;
2070 for (prev_pst
= pst
->objfile
->psymtabs
; prev_pst
; prev_pst
= pst
->next
)
2071 if (prev_pst
->next
== pst
)
2072 prev_pst
->next
= pst
->next
;
2074 /* Next, put it on a free list for recycling */
2076 pst
->next
= pst
->objfile
->free_psymtabs
;
2077 pst
->objfile
->free_psymtabs
= pst
;
2079 /* Indicate that psymtab was thrown away. */
2080 pst
= (struct partial_symtab
*)NULL
;
2085 static void swap_sym
PARAMS ((struct internal_syment
*,
2086 union internal_auxent
*, char **, char **,
2090 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2091 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2092 the symbol and its auxents. */
2095 swap_sym (symbol
, aux
, name
, raw
, symnump
, objfile
)
2096 struct internal_syment
*symbol
;
2097 union internal_auxent
*aux
;
2100 unsigned int *symnump
;
2101 struct objfile
*objfile
;
2103 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2104 if (symbol
->n_zeroes
)
2106 /* If it's exactly E_SYMNMLEN characters long it isn't
2108 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2110 /* FIXME: wastes memory for symbols which we don't end up putting
2111 into the minimal symbols. */
2113 p
= obstack_alloc (&objfile
->psymbol_obstack
, E_SYMNMLEN
+ 1);
2114 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2115 p
[E_SYMNMLEN
] = '\0';
2119 /* Point to the unswapped name as that persists as long as the
2121 *name
= ((struct external_syment
*)*raw
)->e
.e_name
;
2123 else if (symbol
->n_sclass
& 0x80)
2125 *name
= ((struct coff_symfile_info
*)objfile
->sym_private
)->debugsec
2130 *name
= ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
2134 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2135 if (symbol
->n_numaux
> 0)
2137 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2138 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2140 *symnump
+= symbol
->n_numaux
;
2141 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2146 scan_xcoff_symtab (section_offsets
, objfile
)
2147 struct section_offsets
*section_offsets
;
2148 struct objfile
*objfile
;
2150 int toc_offset
= 0; /* toc offset value in data section. */
2151 char *filestring
= NULL
;
2154 int past_first_source_file
= 0;
2158 /* Current partial symtab */
2159 struct partial_symtab
*pst
;
2161 /* List of current psymtab's include files */
2162 char **psymtab_include_list
;
2163 int includes_allocated
;
2166 /* Index within current psymtab dependency list */
2167 struct partial_symtab
**dependency_list
;
2168 int dependencies_used
, dependencies_allocated
;
2171 struct internal_syment symbol
;
2172 union internal_auxent main_aux
;
2173 unsigned int ssymnum
;
2175 char *last_csect_name
= NULL
; /* last seen csect's name and value */
2176 CORE_ADDR last_csect_val
= 0;
2177 int last_csect_sec
= 0;
2178 int misc_func_recorded
= 0; /* true if any misc. function */
2180 pst
= (struct partial_symtab
*) 0;
2182 includes_allocated
= 30;
2184 psymtab_include_list
= (char **) alloca (includes_allocated
*
2187 dependencies_allocated
= 30;
2188 dependencies_used
= 0;
2190 (struct partial_symtab
**) alloca (dependencies_allocated
*
2191 sizeof (struct partial_symtab
*));
2193 last_source_file
= NULL
;
2195 abfd
= objfile
->obfd
;
2197 sraw_symbol
= ((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl
;
2198 nsyms
= ((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl_num_syms
;
2200 while (ssymnum
< nsyms
)
2202 int sclass
= ((struct external_syment
*)sraw_symbol
)->e_sclass
[0] & 0xff;
2203 /* This is the type we pass to partial-stab.h. A less kludgy solution
2204 would be to break out partial-stab.h into its various parts--shuffle
2205 off the DBXREAD_ONLY stuff to dbxread.c, and make separate
2206 pstab-norm.h (for most types), pstab-sol.h (for N_SOL), etc. */
2216 /* The CSECT auxent--always the last auxent. */
2217 union internal_auxent csect_aux
;
2218 unsigned int symnum_before
= ssymnum
;
2220 swap_sym (&symbol
, &main_aux
, &namestring
, &sraw_symbol
,
2222 if (symbol
.n_numaux
> 1)
2224 bfd_coff_swap_aux_in
2226 sraw_symbol
- coff_data(abfd
)->local_symesz
,
2229 symbol
.n_numaux
- 1,
2234 csect_aux
= main_aux
;
2236 /* If symbol name starts with ".$" or "$", ignore it. */
2237 if (namestring
[0] == '$'
2238 || (namestring
[0] == '.' && namestring
[1] == '$'))
2241 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2244 switch (csect_aux
.x_csect
.x_smclas
)
2247 if (last_csect_name
)
2249 /* If no misc. function recorded in the last
2250 seen csect, enter it as a function. This
2251 will take care of functions like strcmp()
2254 if (!misc_func_recorded
)
2256 RECORD_MINIMAL_SYMBOL
2257 (last_csect_name
, last_csect_val
,
2258 mst_text
, last_csect_sec
,
2264 /* We have to allocate one psymtab for
2265 each program csect, because their text
2266 sections need not be adjacent. */
2268 (pst
, psymtab_include_list
,
2271 dependency_list
, dependencies_used
);
2273 dependencies_used
= 0;
2274 /* Give all psymtabs for this source file the same
2276 pst
= xcoff_start_psymtab
2277 (objfile
, section_offsets
,
2280 objfile
->global_psymbols
.next
,
2281 objfile
->static_psymbols
.next
);
2284 if (namestring
&& namestring
[0] == '.')
2286 last_csect_name
= namestring
;
2287 last_csect_val
= symbol
.n_value
;
2289 secnum_to_section (symbol
.n_scnum
, objfile
);
2294 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2295 if (highval
> pst
->texthigh
)
2296 pst
->texthigh
= highval
;
2297 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2298 pst
->textlow
= symbol
.n_value
;
2300 misc_func_recorded
= 0;
2304 /* Data variables are recorded in the minimal symbol
2305 table, except for section symbols. */
2306 if (*namestring
!= '.')
2307 prim_record_minimal_symbol_and_info
2308 (namestring
, symbol
.n_value
,
2309 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2310 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2316 warning ("More than one XMC_TC0 symbol found.");
2317 toc_offset
= symbol
.n_value
;
2321 /* These symbols tell us where the TOC entry for a
2322 variable is, not the variable itself. */
2331 switch (csect_aux
.x_csect
.x_smclas
)
2334 /* A function entry point. */
2336 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2337 first_fun_line_offset
=
2338 main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2339 RECORD_MINIMAL_SYMBOL
2340 (namestring
, symbol
.n_value
,
2341 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2342 secnum_to_section (symbol
.n_scnum
, objfile
),
2347 /* shared library function trampoline code entry
2350 /* record trampoline code entries as
2351 mst_solib_trampoline symbol. When we lookup mst
2352 symbols, we will choose mst_text over
2353 mst_solib_trampoline. */
2354 RECORD_MINIMAL_SYMBOL
2355 (namestring
, symbol
.n_value
,
2356 mst_solib_trampoline
,
2357 secnum_to_section (symbol
.n_scnum
, objfile
),
2362 /* The symbols often have the same names as
2363 debug symbols for functions, and confuse
2369 /* xlc puts each variable in a separate csect,
2370 so we get an XTY_SD for each variable. But
2371 gcc puts several variables in a csect, so
2372 that each variable only gets an XTY_LD. We
2373 still need to record them. This will
2374 typically be XMC_RW; I suspect XMC_RO and
2375 XMC_BS might be possible too. */
2376 if (*namestring
!= '.')
2377 prim_record_minimal_symbol_and_info
2378 (namestring
, symbol
.n_value
,
2379 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2380 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2387 switch (csect_aux
.x_csect
.x_smclas
)
2391 /* Common variables are recorded in the minimal symbol
2392 table, except for section symbols. */
2393 if (*namestring
!= '.')
2394 prim_record_minimal_symbol_and_info
2395 (namestring
, symbol
.n_value
,
2396 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2397 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2410 unsigned int symnum_before
;
2412 symnum_before
= ssymnum
;
2413 swap_sym (&symbol
, &main_aux
, &namestring
, &sraw_symbol
,
2416 /* See if the last csect needs to be recorded. */
2418 if (last_csect_name
&& !misc_func_recorded
)
2421 /* If no misc. function recorded in the last seen csect, enter
2422 it as a function. This will take care of functions like
2423 strcmp() compiled by xlc. */
2425 RECORD_MINIMAL_SYMBOL
2426 (last_csect_name
, last_csect_val
,
2427 mst_text
, last_csect_sec
, objfile
);
2432 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2434 dependency_list
, dependencies_used
);
2436 dependencies_used
= 0;
2438 first_fun_line_offset
= 0;
2440 /* XCOFF, according to the AIX 3.2 documentation, puts the
2441 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2442 do things the standard COFF way and put it in the auxent.
2443 We use the auxent if the symbol is ".file" and an auxent
2444 exists, otherwise use the symbol itself. */
2445 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2447 filestring
= coff_getfilename (&main_aux
, objfile
);
2450 filestring
= namestring
;
2452 pst
= xcoff_start_psymtab (objfile
, section_offsets
,
2455 objfile
->global_psymbols
.next
,
2456 objfile
->static_psymbols
.next
);
2457 last_csect_name
= NULL
;
2463 static struct complaint msg
=
2464 {"Storage class %d not recognized during scan", 0, 0};
2465 complain (&msg
, sclass
);
2469 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2470 to handle only the C_FUN and C_EXT. */
2485 /* C_EINCL means we are switching back to the main file. But there
2486 is no reason to care; the only thing we want to know about
2487 includes is the names of all the included (.h) files. */
2492 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2496 /* I don't think the name of the common block (as opposed to the
2497 variables within it) is something which is user visible
2505 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2506 so C_LSYM would appear to be only for locals. */
2512 /* We probably could save a few instructions by assuming that
2513 C_LSYM, C_PSYM, etc., never have auxents. */
2515 ((struct external_syment
*)sraw_symbol
)->e_numaux
[0] + 1;
2517 sraw_symbol
+= sizeof (struct external_syment
) * naux1
;
2526 /* The value of the C_FUN is not the address of the function (it
2527 appears to be the address before linking), but as long as it
2528 is smaller than the actual address, then find_pc_partial_function
2529 will use the minimal symbols instead. I hope. */
2537 swap_sym (&symbol
, &main_aux
, &namestring
, &sraw_symbol
,
2539 #define CUR_SYMBOL_TYPE stype
2540 #define CUR_SYMBOL_VALUE symbol.n_value
2542 /* START_PSYMTAB and END_PSYMTAB are never used, because they are only
2543 called from DBXREAD_ONLY or N_SO code. Likewise for the symnum
2545 #define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms) 0
2546 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps)\
2548 /* We have already set the namestring. */
2549 #define SET_NAMESTRING() /* */
2551 #include "partial-stab.h"
2557 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2559 dependency_list
, dependencies_used
);
2562 /* Record the toc offset value of this symbol table into ldinfo structure.
2563 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2564 this information would be file auxiliary header. */
2566 #ifndef FAKING_RS6000
2567 xcoff_add_toc_to_loadinfo (toc_offset
);
2571 /* Scan and build partial symbols for a symbol file.
2572 We have been initialized by a call to dbx_symfile_init, which
2573 put all the relevant info into a "struct dbx_symfile_info",
2574 hung off the objfile structure.
2576 SECTION_OFFSETS contains offsets relative to which the symbols in the
2577 various sections are (depending where the sections were actually loaded).
2578 MAINLINE is true if we are reading the main symbol
2579 table (as opposed to a shared lib or dynamically loaded file). */
2582 xcoff_initial_scan (objfile
, section_offsets
, mainline
)
2583 struct objfile
*objfile
;
2584 struct section_offsets
*section_offsets
;
2585 int mainline
; /* FIXME comments above */
2589 struct cleanup
*back_to
;
2590 int num_symbols
; /* # of symbols */
2591 file_ptr symtab_offset
; /* symbol table and */
2592 file_ptr stringtab_offset
; /* string table file offsets */
2593 struct coff_symfile_info
*info
;
2597 #ifndef FAKING_RS6000
2598 /* Initialize load info structure. */
2600 xcoff_init_loadinfo ();
2603 info
= (struct coff_symfile_info
*) objfile
-> sym_private
;
2604 symfile_bfd
= abfd
= objfile
->obfd
;
2605 name
= objfile
->name
;
2607 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2608 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2609 stringtab_offset
= symtab_offset
+
2610 num_symbols
* coff_data(abfd
)->local_symesz
;
2612 info
->min_lineno_offset
= 0;
2613 info
->max_lineno_offset
= 0;
2614 bfd_map_over_sections (abfd
, find_linenos
, info
);
2616 if (num_symbols
> 0)
2618 /* Read the string table. */
2619 init_stringtab (abfd
, stringtab_offset
, objfile
);
2621 /* Read the .debug section, if present. */
2624 bfd_size_type length
;
2625 char *debugsec
= NULL
;
2627 secp
= bfd_get_section_by_name (abfd
, ".debug");
2630 length
= bfd_section_size (abfd
, secp
);
2634 (char *) obstack_alloc (&objfile
->symbol_obstack
, length
);
2636 if (!bfd_get_section_contents (abfd
, secp
, debugsec
,
2637 (file_ptr
) 0, length
))
2639 error ("Error reading .debug section of `%s': %s",
2640 name
, bfd_errmsg (bfd_get_error ()));
2644 ((struct coff_symfile_info
*)objfile
->sym_private
)->debugsec
=
2649 /* Read the symbols. We keep them in core because we will want to
2650 access them randomly in read_symbol*. */
2651 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2653 error ("Error reading symbols from %s: %s",
2654 name
, bfd_errmsg (bfd_get_error ()));
2655 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2656 ((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl
=
2657 obstack_alloc (&objfile
->symbol_obstack
, size
);
2658 ((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl_num_syms
=
2661 val
= bfd_read (((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl
,
2664 perror_with_name ("reading symbol table");
2666 /* If we are reinitializing, or if we have never loaded syms yet, init */
2668 || objfile
->global_psymbols
.size
== 0
2669 || objfile
->static_psymbols
.size
== 0)
2670 /* I'm not sure how how good num_symbols is; the rule of thumb in
2671 init_psymbol_list was developed for a.out. On the one hand,
2672 num_symbols includes auxents. On the other hand, it doesn't
2674 init_psymbol_list (objfile
, num_symbols
);
2677 back_to
= make_cleanup (really_free_pendings
, 0);
2679 init_minimal_symbol_collection ();
2680 make_cleanup (discard_minimal_symbols
, 0);
2682 /* Now that the symbol table data of the executable file are all in core,
2683 process them and define symbols accordingly. */
2685 scan_xcoff_symtab (section_offsets
, objfile
);
2687 /* Install any minimal symbols that have been collected as the current
2688 minimal symbols for this objfile. */
2690 install_minimal_symbols (objfile
);
2692 do_cleanups (back_to
);
2695 static struct section_offsets
*
2696 xcoff_symfile_offsets (objfile
, addr
)
2697 struct objfile
*objfile
;
2700 struct section_offsets
*section_offsets
;
2703 objfile
->num_sections
= SECT_OFF_MAX
;
2704 section_offsets
= (struct section_offsets
*)
2706 (&objfile
-> psymbol_obstack
,
2707 sizeof (struct section_offsets
)
2708 + sizeof (section_offsets
->offsets
) * objfile
->num_sections
);
2710 /* syms_from_objfile kindly subtracts from addr the bfd_section_vma
2711 of the .text section. This strikes me as wrong--whether the
2712 offset to be applied to symbol reading is relative to the start
2713 address of the section depends on the symbol format. In any
2714 event, this whole "addr" concept is pretty broken (it doesn't
2715 handle any section but .text sensibly), so just ignore the addr
2716 parameter and use 0. rs6000-nat.c will set the correct section
2717 offsets via objfile_relocate. */
2718 for (i
= 0; i
< objfile
->num_sections
; ++i
)
2719 ANOFFSET (section_offsets
, i
) = 0;
2721 return section_offsets
;
2724 /* Register our ability to parse symbols for xcoff BFD files. */
2726 static struct sym_fns xcoff_sym_fns
=
2729 /* Because the bfd uses coff_flavour, we need to specially kludge
2730 the flavour. It is possible that coff and xcoff should be merged as
2731 they do have fundamental similarities (for example, the extra storage
2732 classes used for stabs could presumably be recognized in any COFF file).
2733 However, in addition to obvious things like all the csect hair, there are
2734 some subtler differences between xcoffread.c and coffread.c, notably
2735 the fact that coffread.c has no need to read in all the symbols, but
2736 xcoffread.c reads all the symbols and does in fact randomly access them
2737 (in C_BSTAT and line number processing). */
2739 (enum bfd_flavour
)-1,
2741 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2742 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2743 xcoff_initial_scan
, /* sym_read: read a symbol file into symtab */
2744 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2745 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
2746 NULL
/* next: pointer to next struct sym_fns */
2750 _initialize_xcoffread ()
2752 add_symtab_fns(&xcoff_sym_fns
);
2754 func_symbol_type
= init_type (TYPE_CODE_FUNC
, 1, 0,
2755 "<function, no debug info>", NULL
);
2756 TYPE_TARGET_TYPE (func_symbol_type
) = builtin_type_int
;
2758 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ HOST_CHAR_BIT
, 0,
2759 "<variable, no debug info>", NULL
);