1 /* Read AIX xcoff symbol tables and convert to internal format, for GDB.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 1997
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. */
26 #include <sys/types.h>
29 #include "gdb_string.h"
31 #include <sys/param.h>
37 #include "coff/internal.h"
38 #include "libcoff.h" /* FIXME, internal data from BFD */
39 #include "coff/rs6000.h"
46 #include "stabsread.h"
47 #include "expression.h"
48 #include "language.h" /* Needed inside partial-stab.h */
49 #include "complaints.h"
51 #include "gdb-stabs.h"
53 /* For interface with stabsread.c. */
54 #include "aout/stab_gnu.h"
56 /* For interface with partial-stab.h. */
57 #define N_UNDF 0 /* Undefined symbol */
60 #define N_TEXT 4 /* Text sym -- defined at offset in text seg */
61 #define N_DATA 6 /* Data sym -- defined at offset in data seg */
62 #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */
63 #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */
64 #define N_FN 0x1f /* File name of .o file */
65 #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */
66 /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
67 N_DATA, or N_BSS. When the low-order bit of other types is set,
68 (e.g. N_WARNING versus N_FN), they are two different types. */
69 #define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */
72 /* The following symbols refer to set elements.
73 All the N_SET[ATDB] symbols with the same name form one set.
74 Space is allocated for the set in the text section, and each set
75 elements value is stored into one word of the space.
76 The first word of the space is the length of the set (number of elements).
78 The address of the set is made into an N_SETV symbol
79 whose name is the same as the name of the set.
80 This symbol acts like a N_DATA global symbol
81 in that it can satisfy undefined external references. */
83 /* These appear as input to LD, in a .o file. */
84 #define N_SETA 0x14 /* Absolute set element symbol */
85 #define N_SETT 0x16 /* Text set element symbol */
86 #define N_SETD 0x18 /* Data set element symbol */
87 #define N_SETB 0x1A /* Bss set element symbol */
89 /* This is output from LD. */
90 #define N_SETV 0x1C /* Pointer to set vector in data area. */
92 /* Hook for recording the toc offset value of a symbol table into
93 the ldinfo structure. */
95 void (*xcoff_add_toc_to_loadinfo_hook
) PARAMS ((unsigned long)) = NULL
;
97 /* Hook for recording how to call xcoff_init_loadinfo for a native
98 rs6000 config only. */
100 void (*xcoff_init_loadinfo_hook
) PARAMS ((void)) = NULL
;
103 /* We put a pointer to this structure in the read_symtab_private field
108 /* First symbol number for this file. */
112 /* Number of symbols in the section of the symbol table devoted to
113 this file's symbols (actually, the section bracketed may contain
114 more than just this file's symbols). If numsyms is 0, the only
115 reason for this thing's existence is the dependency list. Nothing
116 else will happen when it is read in. */
120 /* Position of the start of the line number information for this psymtab. */
121 unsigned int lineno_off
;
124 /* Remember what we deduced to be the source language of this psymtab. */
126 static enum language psymtab_language
= language_unknown
;
129 /* Simplified internal version of coff symbol table information */
133 int c_symnum
; /* symbol number of this entry */
134 int c_naux
; /* 0 if syment only, 1 if syment + auxent */
136 unsigned char c_sclass
;
141 /* last function's saved coff symbol `cs' */
143 static struct coff_symbol fcn_cs_saved
;
145 static bfd
*symfile_bfd
;
147 /* Core address of start and end of text of current source file.
148 This is calculated from the first function seen after a C_FILE
152 static CORE_ADDR cur_src_end_addr
;
154 /* Core address of the end of the first object file. */
156 static CORE_ADDR first_object_file_end
;
158 /* initial symbol-table-debug-string vector length */
160 #define INITIAL_STABVECTOR_LENGTH 40
162 /* Nonzero if within a function (so symbols should be local,
163 if nothing says specifically). */
167 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
168 there is any reason not to just use a #define, but might as well
169 ask BFD for the size and store it here, I guess. */
171 static unsigned local_symesz
;
173 struct coff_symfile_info
{
174 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
175 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
177 /* Pointer to the string table. */
180 /* Pointer to debug section. */
183 /* Pointer to the a.out symbol table. */
186 /* Number of symbols in symtbl. */
190 static struct complaint storclass_complaint
=
191 {"Unexpected storage class: %d", 0, 0};
193 static struct complaint bf_notfound_complaint
=
194 {"line numbers off, `.bf' symbol not found", 0, 0};
196 static struct complaint ef_complaint
=
197 {"Mismatched .ef symbol ignored starting at symnum %d", 0, 0};
199 static struct complaint eb_complaint
=
200 {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};
203 xcoff_initial_scan
PARAMS ((struct objfile
*, struct section_offsets
*, int));
206 scan_xcoff_symtab
PARAMS ((struct section_offsets
*, struct objfile
*));
209 xcoff_next_symbol_text
PARAMS ((struct objfile
*));
212 record_include_begin
PARAMS ((struct coff_symbol
*));
215 enter_line_range
PARAMS ((struct subfile
*, unsigned, unsigned,
216 CORE_ADDR
, CORE_ADDR
, unsigned *));
219 init_stringtab
PARAMS ((bfd
*, file_ptr
, struct objfile
*));
222 xcoff_symfile_init
PARAMS ((struct objfile
*));
225 xcoff_new_init
PARAMS ((struct objfile
*));
228 xcoff_symfile_finish
PARAMS ((struct objfile
*));
230 static struct section_offsets
*
231 xcoff_symfile_offsets
PARAMS ((struct objfile
*, CORE_ADDR
));
234 find_linenos
PARAMS ((bfd
*, sec_ptr
, PTR
));
237 coff_getfilename
PARAMS ((union internal_auxent
*, struct objfile
*));
240 read_symbol
PARAMS ((struct internal_syment
*, int));
243 read_symbol_lineno
PARAMS ((int));
246 read_symbol_nvalue
PARAMS ((int));
248 static struct symbol
*
249 process_xcoff_symbol
PARAMS ((struct coff_symbol
*, struct objfile
*));
252 read_xcoff_symtab
PARAMS ((struct partial_symtab
*));
256 add_stab_to_list
PARAMS ((char *, struct pending_stabs
**));
260 compare_lte
PARAMS ((const void *, const void *));
262 static struct linetable
*
263 arrange_linetable
PARAMS ((struct linetable
*));
266 record_include_end
PARAMS ((struct coff_symbol
*));
269 process_linenos
PARAMS ((CORE_ADDR
, CORE_ADDR
));
272 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
274 static int secnum_to_section
PARAMS ((int, struct objfile
*));
275 static asection
* secnum_to_bfd_section
PARAMS ((int, struct objfile
*));
277 struct find_targ_sec_arg
{
283 static void find_targ_sec
PARAMS ((bfd
*, asection
*, void *));
285 static void find_targ_sec (abfd
, sect
, obj
)
290 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*)obj
;
291 if (sect
->target_index
== args
->targ_index
)
293 /* This is the section. Figure out what SECT_OFF_* code it is. */
294 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
295 *args
->resultp
= SECT_OFF_TEXT
;
296 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
297 *args
->resultp
= SECT_OFF_DATA
;
299 *args
->resultp
= SECT_OFF_BSS
;
300 *args
->bfd_sect
= sect
;
304 /* Return the section number (SECT_OFF_*) that CS points to. */
306 secnum_to_section (secnum
, objfile
)
308 struct objfile
*objfile
;
310 int off
= SECT_OFF_TEXT
;
311 asection
*sect
= NULL
;
312 struct find_targ_sec_arg args
;
313 args
.targ_index
= secnum
;
315 args
.bfd_sect
= §
;
316 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
320 /* Return the BFD section that CS points to. */
322 secnum_to_bfd_section (secnum
, objfile
)
324 struct objfile
*objfile
;
326 int off
= SECT_OFF_TEXT
;
327 asection
*sect
= NULL
;
328 struct find_targ_sec_arg args
;
329 args
.targ_index
= secnum
;
331 args
.bfd_sect
= §
;
332 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
336 /* add a given stab string into given stab vector. */
341 add_stab_to_list (stabname
, stabvector
)
343 struct pending_stabs
**stabvector
;
345 if ( *stabvector
== NULL
) {
346 *stabvector
= (struct pending_stabs
*)
347 xmalloc (sizeof (struct pending_stabs
) +
348 INITIAL_STABVECTOR_LENGTH
* sizeof (char*));
349 (*stabvector
)->count
= 0;
350 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
352 else if ((*stabvector
)->count
>= (*stabvector
)->length
) {
353 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
354 *stabvector
= (struct pending_stabs
*)
355 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
356 (*stabvector
)->length
* sizeof (char*));
358 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
364 /* Linenos are processed on a file-by-file basis.
368 1) xlc (IBM's native c compiler) postpones static function code
369 emission to the end of a compilation unit. This way it can
370 determine if those functions (statics) are needed or not, and
371 can do some garbage collection (I think). This makes line
372 numbers and corresponding addresses unordered, and we end up
373 with a line table like:
390 and that breaks gdb's binary search on line numbers, if the
391 above table is not sorted on line numbers. And that sort
392 should be on function based, since gcc can emit line numbers
395 10 0x100 - for the init/test part of a for stmt.
398 10 0x400 - for the increment part of a for stmt.
400 arrange_linetable() will do this sorting.
402 2) aix symbol table might look like:
404 c_file // beginning of a new file
405 .bi // beginning of include file
406 .ei // end of include file
410 basically, .bi/.ei pairs do not necessarily encapsulate
411 their scope. They need to be recorded, and processed later
412 on when we come the end of the compilation unit.
413 Include table (inclTable) and process_linenos() handle
416 /* compare line table entry addresses. */
419 compare_lte (lte1p
, lte2p
)
423 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
424 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
425 return lte1
->pc
- lte2
->pc
;
428 /* Given a line table with function entries are marked, arrange its functions
429 in ascending order and strip off function entry markers and return it in
430 a newly created table. If the old one is good enough, return the old one. */
431 /* FIXME: I think all this stuff can be replaced by just passing
432 sort_linevec = 1 to end_symtab. */
434 static struct linetable
*
435 arrange_linetable (oldLineTb
)
436 struct linetable
*oldLineTb
; /* old linetable */
439 newline
, /* new line count */
440 function_count
; /* # of functions */
442 struct linetable_entry
*fentry
; /* function entry vector */
443 int fentry_size
; /* # of function entries */
444 struct linetable
*newLineTb
; /* new line table */
446 #define NUM_OF_FUNCTIONS 20
448 fentry_size
= NUM_OF_FUNCTIONS
;
449 fentry
= (struct linetable_entry
*)
450 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
452 for (function_count
=0, ii
=0; ii
<oldLineTb
->nitems
; ++ii
) {
454 if (oldLineTb
->item
[ii
].line
== 0) { /* function entry found. */
456 if (function_count
>= fentry_size
) { /* make sure you have room. */
458 fentry
= (struct linetable_entry
*)
459 xrealloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
461 fentry
[function_count
].line
= ii
;
462 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
467 if (function_count
== 0) {
471 else if (function_count
> 1)
472 qsort (fentry
, function_count
, sizeof(struct linetable_entry
), compare_lte
);
474 /* allocate a new line table. */
475 newLineTb
= (struct linetable
*)
477 (sizeof (struct linetable
) +
478 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
480 /* if line table does not start with a function beginning, copy up until
484 if (oldLineTb
->item
[0].line
!= 0)
486 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
487 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
489 /* Now copy function lines one by one. */
491 for (ii
=0; ii
< function_count
; ++ii
) {
492 for (jj
= fentry
[ii
].line
+ 1;
493 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
495 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
498 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
502 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
503 following `IncludeChain'. At the end of each symtab (end_symtab),
504 we will determine if we should create additional symtab's to
505 represent if (the include files. */
508 typedef struct _inclTable
{
509 char *name
; /* include filename */
511 /* Offsets to the line table. end points to the last entry which is
512 part of this include file. */
515 struct subfile
*subfile
;
516 unsigned funStartLine
; /* start line # of its function */
519 #define INITIAL_INCLUDE_TABLE_LENGTH 20
520 static InclTable
*inclTable
; /* global include table */
521 static int inclIndx
; /* last entry to table */
522 static int inclLength
; /* table length */
523 static int inclDepth
; /* nested include depth */
525 static void allocate_include_entry
PARAMS ((void));
528 record_include_begin (cs
)
529 struct coff_symbol
*cs
;
533 /* In xcoff, we assume include files cannot be nested (not in .c files
534 of course, but in corresponding .s files.). */
536 /* This can happen with old versions of GCC.
537 GCC 2.3.3-930426 does not exhibit this on a test case which
538 a user said produced the message for him. */
539 static struct complaint msg
= {"Nested C_BINCL symbols", 0, 0};
544 allocate_include_entry ();
546 inclTable
[inclIndx
].name
= cs
->c_name
;
547 inclTable
[inclIndx
].begin
= cs
->c_value
;
551 record_include_end (cs
)
552 struct coff_symbol
*cs
;
558 static struct complaint msg
= {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
562 allocate_include_entry ();
564 pTbl
= &inclTable
[inclIndx
];
565 pTbl
->end
= cs
->c_value
;
572 allocate_include_entry ()
574 if (inclTable
== NULL
)
576 inclTable
= (InclTable
*)
577 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
579 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
580 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
583 else if (inclIndx
>= inclLength
)
585 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
586 inclTable
= (InclTable
*)
587 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
588 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
589 '\0', sizeof (InclTable
)*INITIAL_INCLUDE_TABLE_LENGTH
);
593 /* Global variable to pass the psymtab down to all the routines involved
594 in psymtab to symtab processing. */
595 static struct partial_symtab
*this_symtab_psymtab
;
597 /* given the start and end addresses of a compilation unit (or a csect,
598 at times) process its lines and create appropriate line vectors. */
601 process_linenos (start
, end
)
602 CORE_ADDR start
, end
;
605 file_ptr max_offset
=
606 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
609 /* subfile structure for the main compilation unit. */
610 struct subfile main_subfile
;
612 /* In the main source file, any time we see a function entry, we
613 reset this variable to function's absolute starting line number.
614 All the following line numbers in the function are relative to
615 this, and we record absolute line numbers in record_line(). */
617 unsigned int main_source_baseline
= 0;
622 ((struct symloc
*)this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
624 goto return_after_cleanup
;
626 memset (&main_subfile
, '\0', sizeof (main_subfile
));
629 /* All source lines were in the main source file. None in include files. */
631 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
632 &main_source_baseline
);
636 /* There was source with line numbers in include files. */
637 main_source_baseline
= 0;
638 for (ii
=0; ii
< inclIndx
; ++ii
)
640 struct subfile
*tmpSubfile
;
642 /* If there is main file source before include file, enter it. */
643 if (offset
< inclTable
[ii
].begin
)
646 (&main_subfile
, offset
, inclTable
[ii
].begin
- LINESZ
,
647 start
, 0, &main_source_baseline
);
650 /* Have a new subfile for the include file. */
652 tmpSubfile
= inclTable
[ii
].subfile
=
653 (struct subfile
*) xmalloc (sizeof (struct subfile
));
655 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
656 firstLine
= &(inclTable
[ii
].funStartLine
);
658 /* Enter include file's lines now. */
659 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
660 inclTable
[ii
].end
, start
, 0, firstLine
);
662 if (offset
<= inclTable
[ii
].end
)
663 offset
= inclTable
[ii
].end
+ LINESZ
;
666 /* All the include files' line have been processed at this point. Now,
667 enter remaining lines of the main file, if any left. */
668 if (offset
< max_offset
+ 1 - LINESZ
)
670 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
671 &main_source_baseline
);
675 /* Process main file's line numbers. */
676 if (main_subfile
.line_vector
)
678 struct linetable
*lineTb
, *lv
;
680 lv
= main_subfile
.line_vector
;
682 /* Line numbers are not necessarily ordered. xlc compilation will
683 put static function to the end. */
685 lineTb
= arrange_linetable (lv
);
688 current_subfile
->line_vector
= (struct linetable
*)
689 xrealloc (lv
, (sizeof (struct linetable
)
690 + lv
->nitems
* sizeof (struct linetable_entry
)));
695 current_subfile
->line_vector
= lineTb
;
698 current_subfile
->line_vector_length
=
699 current_subfile
->line_vector
->nitems
;
702 /* Now, process included files' line numbers. */
704 for (ii
=0; ii
< inclIndx
; ++ii
)
706 if ((inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!! FIXMEmgo */
708 struct linetable
*lineTb
, *lv
;
710 lv
= (inclTable
[ii
].subfile
)->line_vector
;
712 /* Line numbers are not necessarily ordered. xlc compilation will
713 put static function to the end. */
715 lineTb
= arrange_linetable (lv
);
719 /* For the same include file, we might want to have more than one
720 subfile. This happens if we have something like:
728 while foo.h including code in it. (stupid but possible)
729 Since start_subfile() looks at the name and uses an
730 existing one if finds, we need to provide a fake name and
734 start_subfile (inclTable
[ii
].name
, (char*)0);
737 /* Pick a fake name that will produce the same results as this
738 one when passed to deduce_language_from_filename. Kludge on
740 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
741 if (fakename
== NULL
)
743 start_subfile (fakename
, (char*)0);
744 free (current_subfile
->name
);
746 current_subfile
->name
= strdup (inclTable
[ii
].name
);
751 current_subfile
->line_vector
=
752 (struct linetable
*) xrealloc
753 (lv
, (sizeof (struct linetable
)
754 + lv
->nitems
* sizeof (struct linetable_entry
)));
760 current_subfile
->line_vector
= lineTb
;
763 current_subfile
->line_vector_length
=
764 current_subfile
->line_vector
->nitems
;
765 start_subfile (pop_subfile (), (char*)0);
769 return_after_cleanup
:
771 /* We don't want to keep alloc/free'ing the global include file table. */
774 /* Start with a fresh subfile structure for the next file. */
775 memset (&main_subfile
, '\0', sizeof (struct subfile
));
779 aix_process_linenos ()
781 /* process line numbers and enter them into line vector */
782 process_linenos (last_source_start_addr
, cur_src_end_addr
);
786 /* Enter a given range of lines into the line vector.
787 can be called in the following two ways:
788 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
789 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
791 endoffset points to the last line table entry that we should pay
795 enter_line_range (subfile
, beginoffset
, endoffset
, startaddr
, endaddr
,
797 struct subfile
*subfile
;
798 unsigned beginoffset
, endoffset
; /* offsets to line table */
799 CORE_ADDR startaddr
, endaddr
;
802 unsigned int curoffset
;
804 struct external_lineno ext_lnno
;
805 struct internal_lineno int_lnno
;
806 unsigned int limit_offset
;
809 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
811 curoffset
= beginoffset
;
813 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
818 if (endoffset
>= limit_offset
)
820 static struct complaint msg
=
821 {"Bad line table offset in C_EINCL directive", 0, 0};
825 limit_offset
= endoffset
;
829 abfd
= this_symtab_psymtab
->objfile
->obfd
;
831 while (curoffset
<= limit_offset
)
833 bfd_seek (abfd
, curoffset
, SEEK_SET
);
834 bfd_read (&ext_lnno
, sizeof (struct external_lineno
), 1, abfd
);
835 bfd_coff_swap_lineno_in (abfd
, &ext_lnno
, &int_lnno
);
837 /* Find the address this line represents. */
838 addr
= (int_lnno
.l_lnno
839 ? int_lnno
.l_addr
.l_paddr
840 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
841 addr
+= ANOFFSET (this_symtab_psymtab
->objfile
->section_offsets
,
844 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
847 if (int_lnno
.l_lnno
== 0)
849 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
850 record_line (subfile
, 0, addr
);
854 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
, addr
);
860 /* Save the vital information for use when closing off the current file.
861 NAME is the file name the symbols came from, START_ADDR is the first
862 text address for the file, and SIZE is the number of bytes of text. */
864 #define complete_symtab(name, start_addr) { \
865 last_source_file = savestring (name, strlen (name)); \
866 last_source_start_addr = start_addr; \
870 /* Refill the symbol table input buffer
871 and set the variables that control fetching entries from it.
872 Reports an error if no data available.
873 This function can read past the end of the symbol table
874 (into the string table) but this does no harm. */
876 /* Reading symbol table has to be fast! Keep the followings as macros, rather
879 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
883 if (namestr[0] == '.') ++namestr; \
884 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
885 (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \
886 misc_func_recorded = 1; \
890 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
891 nested. At any given time, a symbol can only be in one static block.
892 This is the base address of current static block, zero if non exists. */
894 static int static_block_base
= 0;
896 /* Section number for the current static block. */
898 static int static_block_section
= -1;
900 /* true if space for symbol name has been allocated. */
902 static int symname_alloced
= 0;
904 /* Next symbol to read. Pointer into raw seething symbol table. */
906 static char *raw_symbol
;
908 /* This is the function which stabsread.c calls to get symbol
912 xcoff_next_symbol_text (objfile
)
913 struct objfile
*objfile
;
915 struct internal_syment symbol
;
916 static struct complaint msg
=
917 {"Unexpected symbol continuation", 0, 0};
919 /* FIXME: is this the same as the passed arg? */
920 objfile
= this_symtab_psymtab
->objfile
;
922 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
927 /* Return something which points to '\0' and hope the symbol reading
928 code does something reasonable. */
931 else if (symbol
.n_sclass
& 0x80)
934 ((struct coff_symfile_info
*)objfile
->sym_private
)->debugsec
937 coff_data (objfile
->obfd
)->local_symesz
;
944 /* Return something which points to '\0' and hope the symbol reading
945 code does something reasonable. */
951 /* Read symbols for a given partial symbol table. */
954 read_xcoff_symtab (pst
)
955 struct partial_symtab
*pst
;
957 struct objfile
*objfile
= pst
->objfile
;
958 bfd
*abfd
= objfile
->obfd
;
959 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
960 char *strtbl
= ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
;
962 ((struct coff_symfile_info
*)objfile
->sym_private
)->debugsec
;
964 struct internal_syment symbol
[1];
965 union internal_auxent main_aux
;
966 struct coff_symbol cs
[1];
967 CORE_ADDR file_start_addr
= 0;
968 CORE_ADDR file_end_addr
= 0;
970 int next_file_symnum
= -1;
971 unsigned int max_symnum
;
972 int just_started
= 1;
974 int fcn_start_addr
= 0;
976 struct coff_symbol fcn_stab_saved
;
978 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
979 union internal_auxent fcn_aux_saved
;
980 struct context_stack
*new;
982 char *filestring
= " _start_ "; /* Name of the current file. */
984 char *last_csect_name
; /* last seen csect's name and value */
985 CORE_ADDR last_csect_val
;
988 this_symtab_psymtab
= pst
;
990 /* Get the appropriate COFF "constants" related to the file we're
992 local_symesz
= coff_data (abfd
)->local_symesz
;
994 last_source_file
= NULL
;
999 start_symtab (filestring
, (char *)NULL
, file_start_addr
);
1000 record_debugformat ("XCOFF");
1001 symnum
= ((struct symloc
*)pst
->read_symtab_private
)->first_symnum
;
1003 symnum
+ ((struct symloc
*)pst
->read_symtab_private
)->numsyms
;
1004 first_object_file_end
= 0;
1007 ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
1008 + symnum
* local_symesz
;
1010 while (symnum
< max_symnum
)
1013 QUIT
; /* make this command interruptable. */
1015 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1016 /* read one symbol into `cs' structure. After processing the
1017 whole symbol table, only string table will be kept in memory,
1018 symbol table and debug section of xcoff will be freed. Thus
1019 we can mark symbols with names in string table as
1024 /* Swap and align the symbol into a reasonable C structure. */
1025 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1027 cs
->c_symnum
= symnum
;
1028 cs
->c_naux
= symbol
->n_numaux
;
1029 if (symbol
->n_zeroes
)
1031 symname_alloced
= 0;
1032 /* We must use the original, unswapped, name here so the name field
1033 pointed to by cs->c_name will persist throughout xcoffread. If
1034 we use the new field, it gets overwritten for each symbol. */
1035 cs
->c_name
= ((struct external_syment
*)raw_symbol
)->e
.e_name
;
1036 /* If it's exactly E_SYMNMLEN characters long it isn't
1038 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1041 p
= obstack_alloc (&objfile
->symbol_obstack
, E_SYMNMLEN
+ 1);
1042 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1043 p
[E_SYMNMLEN
] = '\0';
1045 symname_alloced
= 1;
1048 else if (symbol
->n_sclass
& 0x80)
1050 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1051 symname_alloced
= 0;
1055 /* in string table */
1056 cs
->c_name
= strtbl
+ (int)symbol
->n_offset
;
1057 symname_alloced
= 1;
1059 cs
->c_value
= symbol
->n_value
;
1060 cs
->c_sclass
= symbol
->n_sclass
;
1061 cs
->c_secnum
= symbol
->n_scnum
;
1062 cs
->c_type
= (unsigned)symbol
->n_type
;
1064 raw_symbol
+= coff_data (abfd
)->local_symesz
;
1067 /* Save addr of first aux entry. */
1068 raw_auxptr
= raw_symbol
;
1070 /* Skip all the auxents associated with this symbol. */
1071 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1073 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1078 /* if symbol name starts with ".$" or "$", ignore it. */
1079 if (cs
->c_name
[0] == '$'
1080 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1083 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1085 if (last_source_file
)
1088 end_symtab (cur_src_end_addr
, objfile
, SECT_OFF_TEXT
);
1093 start_symtab ("_globals_", (char *)NULL
, (CORE_ADDR
)0);
1094 record_debugformat ("XCOFF");
1095 cur_src_end_addr
= first_object_file_end
;
1096 /* done with all files, everything from here on is globals */
1099 /* if explicitly specified as a function, treat is as one. */
1100 if (ISFCN(cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1102 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1103 0, cs
->c_naux
, &main_aux
);
1104 goto function_entry_point
;
1107 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1110 /* Dealing with a symbol with a csect entry. */
1112 #define CSECT(PP) ((PP)->x_csect)
1113 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1114 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1115 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1116 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1118 /* Convert the auxent to something we can access. */
1119 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1120 0, cs
->c_naux
, &main_aux
);
1122 switch (CSECT_SMTYP (&main_aux
))
1126 /* Ignore all external references. */
1130 /* A section description. */
1132 switch (CSECT_SCLAS (&main_aux
))
1138 /* A program csect is seen. We have to allocate one
1139 symbol table for each program csect. Normally gdb
1140 prefers one symtab for each source file. In case
1141 of AIX, one source file might include more than one
1142 [PR] csect, and they don't have to be adjacent in
1143 terms of the space they occupy in memory. Thus, one
1144 single source file might get fragmented in the
1145 memory and gdb's file start and end address
1146 approach does not work! GCC (and I think xlc) seem
1147 to put all the code in the unnamed program csect. */
1149 if (last_csect_name
)
1151 complete_symtab (filestring
, file_start_addr
);
1152 cur_src_end_addr
= file_end_addr
;
1153 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT
);
1156 /* Give all csects for this source file the same
1158 start_symtab (filestring
, NULL
, (CORE_ADDR
)0);
1159 record_debugformat ("XCOFF");
1162 /* If this is the very first csect seen,
1163 basically `__start'. */
1166 first_object_file_end
1167 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1172 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1174 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1176 if (cs
->c_name
&& cs
->c_name
[0] == '.')
1178 last_csect_name
= cs
->c_name
;
1179 last_csect_val
= cs
->c_value
;
1180 last_csect_sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1185 /* All other symbols are put into the minimal symbol
1198 /* Ignore the symbol. */
1206 switch (CSECT_SCLAS (&main_aux
))
1209 /* a function entry point. */
1210 function_entry_point
:
1212 fcn_start_addr
= cs
->c_value
;
1214 /* save the function header info, which will be used
1215 when `.bf' is seen. */
1217 fcn_aux_saved
= main_aux
;
1221 /* shared library function trampoline code entry point. */
1225 /* The symbols often have the same names as debug symbols for
1226 functions, and confuse lookup_symbol. */
1230 /* xlc puts each variable in a separate csect, so we get
1231 an XTY_SD for each variable. But gcc puts several
1232 variables in a csect, so that each variable only gets
1233 an XTY_LD. This will typically be XMC_RW; I suspect
1234 XMC_RO and XMC_BS might be possible too.
1235 These variables are put in the minimal symbol table
1242 /* Common symbols are put into the minimal symbol table only. */
1250 switch (cs
->c_sclass
)
1255 /* c_value field contains symnum of next .file entry in table
1256 or symnum of first global after last .file. */
1258 next_file_symnum
= cs
->c_value
;
1260 /* Complete symbol table for last object file containing
1261 debugging information. */
1263 /* Whether or not there was a csect in the previous file, we
1264 have to call `end_stabs' and `start_stabs' to reset
1265 type_vector, line_vector, etc. structures. */
1267 complete_symtab (filestring
, file_start_addr
);
1268 cur_src_end_addr
= file_end_addr
;
1269 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT
);
1272 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1273 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1274 standard COFF way and put it in the auxent. We use the auxent if
1275 the symbol is ".file" and an auxent exists, otherwise use the symbol
1276 itself. Simple enough. */
1277 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1279 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1280 0, cs
->c_naux
, &main_aux
);
1281 filestring
= coff_getfilename (&main_aux
, objfile
);
1284 filestring
= cs
->c_name
;
1287 start_symtab (filestring
, (char *)NULL
, (CORE_ADDR
)0);
1288 record_debugformat ("XCOFF");
1289 last_csect_name
= 0;
1291 /* reset file start and end addresses. A compilation unit with no text
1292 (only data) should have zero file boundaries. */
1293 file_start_addr
= file_end_addr
= 0;
1297 fcn_stab_saved
= *cs
;
1301 if (STREQ (cs
->c_name
, ".bf"))
1303 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1305 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1306 0, cs
->c_naux
, &main_aux
);
1308 within_function
= 1;
1310 new = push_context (0, fcn_start_addr
+ off
);
1312 new->name
= define_symbol
1313 (fcn_cs_saved
.c_value
+ off
,
1314 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1315 if (new->name
!= NULL
)
1316 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT
;
1318 else if (STREQ (cs
->c_name
, ".ef"))
1321 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1322 0, cs
->c_naux
, &main_aux
);
1324 /* The value of .ef is the address of epilogue code;
1325 not useful for gdb. */
1326 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1327 contains number of lines to '}' */
1329 if (context_stack_depth
<= 0)
1330 { /* We attempted to pop an empty context stack */
1331 complain (&ef_complaint
, cs
->c_symnum
);
1332 within_function
= 0;
1335 new = pop_context ();
1336 /* Stack must be empty now. */
1337 if (context_stack_depth
> 0 || new == NULL
)
1339 complain (&ef_complaint
, cs
->c_symnum
);
1340 within_function
= 0;
1344 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1346 (fcn_cs_saved
.c_value
1347 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1348 + ANOFFSET (objfile
->section_offsets
,
1351 within_function
= 0;
1356 /* Begin static block. */
1358 struct internal_syment symbol
;
1360 read_symbol (&symbol
, cs
->c_value
);
1361 static_block_base
= symbol
.n_value
;
1362 static_block_section
=
1363 secnum_to_section (symbol
.n_scnum
, objfile
);
1368 /* End of static block. */
1369 static_block_base
= 0;
1370 static_block_section
= -1;
1381 static struct complaint msg
=
1382 {"Unrecognized storage class %d.", 0, 0};
1383 complain (&msg
, cs
->c_sclass
);
1397 /* beginning of include file */
1398 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1399 order. Thus, when wee see them, we might not know enough info
1400 to process them. Thus, we'll be saving them into a table
1401 (inclTable) and postpone their processing. */
1403 record_include_begin (cs
);
1407 /* End of include file. */
1408 /* See the comment after case C_BINCL. */
1409 record_include_end (cs
);
1413 if (STREQ (cs
->c_name
, ".bb"))
1416 new = push_context (depth
,
1418 + ANOFFSET (objfile
->section_offsets
,
1421 else if (STREQ (cs
->c_name
, ".eb"))
1423 if (context_stack_depth
<= 0)
1424 { /* We attempted to pop an empty context stack */
1425 complain (&eb_complaint
, cs
->c_symnum
);
1428 new = pop_context ();
1429 if (depth
-- != new->depth
)
1431 complain (&eb_complaint
, cs
->c_symnum
);
1434 if (local_symbols
&& context_stack_depth
> 0)
1436 /* Make a block for the local symbols within. */
1437 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1440 + ANOFFSET (objfile
->section_offsets
,
1444 local_symbols
= new->locals
;
1449 process_xcoff_symbol (cs
, objfile
);
1454 if (last_source_file
)
1458 complete_symtab (filestring
, file_start_addr
);
1459 cur_src_end_addr
= file_end_addr
;
1460 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT
);
1461 /* When reading symbols for the last C_FILE of the objfile, try
1462 to make sure that we set pst->symtab to the symtab for the
1463 file, not to the _globals_ symtab. I'm not sure whether this
1464 actually works right or when/if it comes up. */
1465 if (pst
->symtab
== NULL
)
1471 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1472 (SYMBOL2) = (struct symbol *) \
1473 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1474 *(SYMBOL2) = *(SYMBOL1);
1477 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1478 (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->symbol_obstack);
1481 static struct type
*func_symbol_type
;
1482 static struct type
*var_symbol_type
;
1484 /* process one xcoff symbol. */
1486 static struct symbol
*
1487 process_xcoff_symbol (cs
, objfile
)
1488 register struct coff_symbol
*cs
;
1489 struct objfile
*objfile
;
1491 struct symbol onesymbol
;
1492 register struct symbol
*sym
= &onesymbol
;
1493 struct symbol
*sym2
= NULL
;
1499 if (cs
->c_secnum
< 0)
1501 /* The value is a register number, offset within a frame, etc.,
1502 and does not get relocated. */
1508 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1509 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1516 memset (sym
, '\0', sizeof (struct symbol
));
1518 /* default assumptions */
1519 SYMBOL_VALUE (sym
) = cs
->c_value
+ off
;
1520 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1521 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1523 if (ISFCN (cs
->c_type
))
1525 /* At this point, we don't know the type of the function. This
1526 will be patched with the type from its stab entry later on in
1527 patch_block_stabs (), unless the file was compiled without -g. */
1529 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1530 SYMBOL_TYPE (sym
) = func_symbol_type
;
1532 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1533 SYMBOL_DUP (sym
, sym2
);
1535 if (cs
->c_sclass
== C_EXT
)
1536 add_symbol_to_list (sym2
, &global_symbols
);
1537 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1538 add_symbol_to_list (sym2
, &file_symbols
);
1542 /* In case we can't figure out the type, provide default. */
1543 SYMBOL_TYPE (sym
) = var_symbol_type
;
1545 switch (cs
->c_sclass
)
1548 /* The values of functions and global symbols are now resolved
1549 via the global_sym_chain in stabsread.c. */
1551 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1552 add_stab_to_list (name
, &global_stabs
);
1554 add_stab_to_list (name
, &file_stabs
);
1558 add_stab_to_list (name
, &global_stabs
);
1563 common_block_start (cs
->c_name
, objfile
);
1567 common_block_end (objfile
);
1571 complain (&storclass_complaint
, cs
->c_sclass
);
1583 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1586 SYMBOL_SECTION (sym
) = sec
;
1593 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1594 all statics and we need to distinguish file-scope versus
1595 function-scope using within_function. We do this by
1596 changing the string we pass to define_symbol to use 'S'
1597 where we need to, which is not necessarily super-clean,
1598 but seems workable enough. */
1600 if (*name
== ':' || (pp
= (char *) strchr(name
, ':')) == NULL
)
1604 if (*pp
== 'V' && !within_function
)
1606 sym
= define_symbol ((cs
->c_value
1607 + ANOFFSET (objfile
->section_offsets
,
1608 static_block_section
)),
1609 cs
->c_name
, 0, 0, objfile
);
1612 SYMBOL_VALUE (sym
) += static_block_base
;
1613 SYMBOL_SECTION (sym
) = static_block_section
;
1622 /* Extract the file name from the aux entry of a C_FILE symbol. Return
1623 only the last component of the name. Result is in static storage and
1624 is only good for temporary use. */
1627 coff_getfilename (aux_entry
, objfile
)
1628 union internal_auxent
*aux_entry
;
1629 struct objfile
*objfile
;
1631 static char buffer
[BUFSIZ
];
1632 register char *temp
;
1635 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1637 ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
1638 + aux_entry
->x_file
.x_n
.x_offset
);
1641 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1642 buffer
[FILNMLEN
] = '\0';
1646 /* FIXME: We should not be throwing away the information about what
1647 directory. It should go into dirname of the symtab, or some such
1649 if ((temp
= strrchr (result
, '/')) != NULL
)
1654 /* Set *SYMBOL to symbol number symno in symtbl. */
1656 read_symbol (symbol
, symno
)
1657 struct internal_syment
*symbol
;
1661 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
1664 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
1666 if (symno
< 0 || symno
>= nsyms
)
1668 static struct complaint msg
=
1669 {"Invalid symbol offset", 0, 0};
1671 symbol
->n_value
= 0;
1672 symbol
->n_scnum
= -1;
1675 bfd_coff_swap_sym_in (this_symtab_psymtab
->objfile
->obfd
,
1676 stbl
+ (symno
*local_symesz
),
1680 /* Get value corresponding to symbol number symno in symtbl. */
1683 read_symbol_nvalue (symno
)
1686 struct internal_syment symbol
[1];
1688 read_symbol (symbol
, symno
);
1689 return symbol
->n_value
;
1693 /* Find the address of the function corresponding to symno, where
1694 symno is the symbol pointed to by the linetable. */
1697 read_symbol_lineno (symno
)
1701 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
1704 ((struct coff_symfile_info
*)this_symtab_psymtab
->objfile
->sym_private
)
1706 struct internal_syment symbol
[1];
1707 union internal_auxent main_aux
[1];
1711 complain (&bf_notfound_complaint
);
1715 /* Note that just searching for a short distance (e.g. 50 symbols)
1716 is not enough, at least in the following case.
1719 [many .stabx entries]
1720 [a few functions, referring to foo]
1724 What happens here is that the assembler moves the .stabx entries
1725 to right before the ".bf" for foo, but the symbol for "foo" is before
1726 all the stabx entries. See PR gdb/2222. */
1728 /* Maintaining a table of .bf entries might be preferable to this search.
1729 If I understand things correctly it would need to be done only for
1730 the duration of a single psymtab to symtab conversion. */
1731 while (symno
< nsyms
)
1733 bfd_coff_swap_sym_in (symfile_bfd
,
1734 stbl
+ (symno
* local_symesz
), symbol
);
1735 if (symbol
->n_sclass
== C_FCN
&& STREQ (symbol
->n_name
, ".bf"))
1737 symno
+= symbol
->n_numaux
+ 1;
1740 complain (&bf_notfound_complaint
);
1744 /* take aux entry and return its lineno */
1746 bfd_coff_swap_aux_in (this_symtab_psymtab
->objfile
->obfd
,
1747 stbl
+ symno
* local_symesz
,
1748 symbol
->n_type
, symbol
->n_sclass
,
1749 0, symbol
->n_numaux
, main_aux
);
1751 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1754 /* Support for line number handling */
1756 /* This function is called for every section; it finds the outer limits
1757 * of the line table (minimum and maximum file offset) so that the
1758 * mainline code can read the whole thing for efficiency.
1761 find_linenos (abfd
, asect
, vpinfo
)
1766 struct coff_symfile_info
*info
;
1768 file_ptr offset
, maxoff
;
1770 count
= asect
->lineno_count
;
1772 if (!STREQ (asect
->name
, ".text") || count
== 0)
1775 size
= count
* coff_data (abfd
)->local_linesz
;
1776 info
= (struct coff_symfile_info
*)vpinfo
;
1777 offset
= asect
->line_filepos
;
1778 maxoff
= offset
+ size
;
1780 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1781 info
->min_lineno_offset
= offset
;
1783 if (maxoff
> info
->max_lineno_offset
)
1784 info
->max_lineno_offset
= maxoff
;
1787 static void xcoff_psymtab_to_symtab_1
PARAMS ((struct partial_symtab
*));
1790 xcoff_psymtab_to_symtab_1 (pst
)
1791 struct partial_symtab
*pst
;
1793 struct cleanup
*old_chain
;
1802 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1807 /* Read in all partial symtabs on which this one is dependent */
1808 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1809 if (!pst
->dependencies
[i
]->readin
)
1811 /* Inform about additional files that need to be read in. */
1814 fputs_filtered (" ", gdb_stdout
);
1816 fputs_filtered ("and ", gdb_stdout
);
1818 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1819 wrap_here (""); /* Flush output */
1820 gdb_flush (gdb_stdout
);
1822 xcoff_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1825 if (((struct symloc
*)pst
->read_symtab_private
)->numsyms
!= 0)
1827 /* Init stuff necessary for reading in symbols. */
1830 old_chain
= make_cleanup (really_free_pendings
, 0);
1832 read_xcoff_symtab (pst
);
1833 sort_symtab_syms (pst
->symtab
);
1835 do_cleanups (old_chain
);
1841 static void xcoff_psymtab_to_symtab
PARAMS ((struct partial_symtab
*));
1843 /* Read in all of the symbols for a given psymtab for real.
1844 Be verbose about it if the user wants that. */
1847 xcoff_psymtab_to_symtab (pst
)
1848 struct partial_symtab
*pst
;
1858 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1863 if (((struct symloc
*)pst
->read_symtab_private
)->numsyms
!= 0
1864 || pst
->number_of_dependencies
)
1866 /* Print the message now, before reading the string table,
1867 to avoid disconcerting pauses. */
1870 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1871 gdb_flush (gdb_stdout
);
1874 sym_bfd
= pst
->objfile
->obfd
;
1876 next_symbol_text_func
= xcoff_next_symbol_text
;
1878 xcoff_psymtab_to_symtab_1 (pst
);
1880 /* Match with global symbols. This only needs to be done once,
1881 after all of the symtabs and dependencies have been read in. */
1882 scan_file_globals (pst
->objfile
);
1884 /* Finish up the debug error message. */
1886 printf_filtered ("done.\n");
1891 xcoff_new_init (objfile
)
1892 struct objfile
*objfile
;
1894 stabsread_new_init ();
1895 buildsym_new_init ();
1898 /* Do initialization in preparation for reading symbols from OBJFILE.
1900 We will only be called if this is an XCOFF or XCOFF-like file.
1901 BFD handles figuring out the format of the file, and code in symfile.c
1902 uses BFD's determination to vector to us. */
1905 xcoff_symfile_init (objfile
)
1906 struct objfile
*objfile
;
1908 /* Allocate struct to keep track of the symfile */
1909 objfile
-> sym_private
= xmmalloc (objfile
-> md
,
1910 sizeof (struct coff_symfile_info
));
1912 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1913 find this causes a significant slowdown in gdb then we could
1914 set it in the debug symbol readers only when necessary. */
1915 objfile
->flags
|= OBJF_REORDERED
;
1917 init_entry_point_info (objfile
);
1920 /* Perform any local cleanups required when we are done with a particular
1921 objfile. I.E, we are in the process of discarding all symbol information
1922 for an objfile, freeing up all memory held for it, and unlinking the
1923 objfile struct from the global list of known objfiles. */
1926 xcoff_symfile_finish (objfile
)
1927 struct objfile
*objfile
;
1929 if (objfile
-> sym_private
!= NULL
)
1931 mfree (objfile
-> md
, objfile
-> sym_private
);
1934 /* Start with a fresh include table for the next objfile. */
1940 inclIndx
= inclLength
= inclDepth
= 0;
1945 init_stringtab (abfd
, offset
, objfile
)
1948 struct objfile
*objfile
;
1952 unsigned char lengthbuf
[4];
1955 ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
= NULL
;
1957 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1958 error ("cannot seek to string table in %s: %s",
1959 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1961 val
= bfd_read ((char *)lengthbuf
, 1, sizeof lengthbuf
, abfd
);
1962 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1964 /* If no string table is needed, then the file may end immediately
1965 after the symbols. Just return with `strtbl' set to NULL. */
1967 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1970 /* Allocate string table from symbol_obstack. We will need this table
1971 as long as we have its symbol table around. */
1973 strtbl
= (char *) obstack_alloc (&objfile
->symbol_obstack
, length
);
1974 ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
= strtbl
;
1976 /* Copy length buffer, the first byte is usually zero and is
1977 used for stabs with a name length of zero. */
1978 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1979 if (length
== sizeof lengthbuf
)
1982 val
= bfd_read (strtbl
+ sizeof lengthbuf
, 1, length
- sizeof lengthbuf
,
1985 if (val
!= length
- sizeof lengthbuf
)
1986 error ("cannot read string table from %s: %s",
1987 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1988 if (strtbl
[length
- 1] != '\0')
1989 error ("bad symbol file: string table does not end with null character");
1994 /* If we have not yet seen a function for this psymtab, this is 0. If we
1995 have seen one, it is the offset in the line numbers of the line numbers
1997 static unsigned int first_fun_line_offset
;
1999 static struct partial_symtab
*xcoff_start_psymtab
2000 PARAMS ((struct objfile
*, struct section_offsets
*, char *, int,
2001 struct partial_symbol
**, struct partial_symbol
**));
2003 /* Allocate and partially fill a partial symtab. It will be
2004 completely filled at the end of the symbol list.
2006 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
2007 is the address relative to which its symbols are (incremental) or 0
2010 static struct partial_symtab
*
2011 xcoff_start_psymtab (objfile
, section_offsets
,
2012 filename
, first_symnum
, global_syms
, static_syms
)
2013 struct objfile
*objfile
;
2014 struct section_offsets
*section_offsets
;
2017 struct partial_symbol
**global_syms
;
2018 struct partial_symbol
**static_syms
;
2020 struct partial_symtab
*result
=
2021 start_psymtab_common (objfile
, section_offsets
,
2023 /* We fill in textlow later. */
2025 global_syms
, static_syms
);
2027 result
->read_symtab_private
= (char *)
2028 obstack_alloc (&objfile
-> psymbol_obstack
, sizeof (struct symloc
));
2029 ((struct symloc
*)result
->read_symtab_private
)->first_symnum
= first_symnum
;
2030 result
->read_symtab
= xcoff_psymtab_to_symtab
;
2032 /* Deduce the source language from the filename for this psymtab. */
2033 psymtab_language
= deduce_language_from_filename (filename
);
2038 static struct partial_symtab
*xcoff_end_psymtab
2039 PARAMS ((struct partial_symtab
*, char **, int, int,
2040 struct partial_symtab
**, int, int));
2042 /* Close off the current usage of PST.
2043 Returns PST, or NULL if the partial symtab was empty and thrown away.
2045 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2047 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2048 are the information for includes and dependencies. */
2050 static struct partial_symtab
*
2051 xcoff_end_psymtab (pst
, include_list
, num_includes
, capping_symbol_number
,
2052 dependency_list
, number_dependencies
, textlow_not_set
)
2053 struct partial_symtab
*pst
;
2054 char **include_list
;
2056 int capping_symbol_number
;
2057 struct partial_symtab
**dependency_list
;
2058 int number_dependencies
;
2059 int textlow_not_set
;
2062 struct objfile
*objfile
= pst
-> objfile
;
2064 if (capping_symbol_number
!= -1)
2065 ((struct symloc
*)pst
->read_symtab_private
)->numsyms
=
2066 capping_symbol_number
2067 - ((struct symloc
*)pst
->read_symtab_private
)->first_symnum
;
2068 ((struct symloc
*)pst
->read_symtab_private
)->lineno_off
=
2069 first_fun_line_offset
;
2070 first_fun_line_offset
= 0;
2071 pst
->n_global_syms
=
2072 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2073 pst
->n_static_syms
=
2074 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2076 pst
->number_of_dependencies
= number_dependencies
;
2077 if (number_dependencies
)
2079 pst
->dependencies
= (struct partial_symtab
**)
2080 obstack_alloc (&objfile
->psymbol_obstack
,
2081 number_dependencies
* sizeof (struct partial_symtab
*));
2082 memcpy (pst
->dependencies
, dependency_list
,
2083 number_dependencies
* sizeof (struct partial_symtab
*));
2086 pst
->dependencies
= 0;
2088 for (i
= 0; i
< num_includes
; i
++)
2090 struct partial_symtab
*subpst
=
2091 allocate_psymtab (include_list
[i
], objfile
);
2093 subpst
->section_offsets
= pst
->section_offsets
;
2094 subpst
->read_symtab_private
=
2095 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
2096 sizeof (struct symloc
));
2097 ((struct symloc
*)subpst
->read_symtab_private
)->first_symnum
= 0;
2098 ((struct symloc
*)subpst
->read_symtab_private
)->numsyms
= 0;
2099 subpst
->textlow
= 0;
2100 subpst
->texthigh
= 0;
2102 /* We could save slight bits of space by only making one of these,
2103 shared by the entire set of include files. FIXME-someday. */
2104 subpst
->dependencies
= (struct partial_symtab
**)
2105 obstack_alloc (&objfile
->psymbol_obstack
,
2106 sizeof (struct partial_symtab
*));
2107 subpst
->dependencies
[0] = pst
;
2108 subpst
->number_of_dependencies
= 1;
2110 subpst
->globals_offset
=
2111 subpst
->n_global_syms
=
2112 subpst
->statics_offset
=
2113 subpst
->n_static_syms
= 0;
2117 subpst
->read_symtab
= pst
->read_symtab
;
2120 sort_pst_symbols (pst
);
2122 /* If there is already a psymtab or symtab for a file of this name,
2123 remove it. (If there is a symtab, more drastic things also
2124 happen.) This happens in VxWorks. */
2125 free_named_symtabs (pst
->filename
);
2127 if (num_includes
== 0
2128 && number_dependencies
== 0
2129 && pst
->n_global_syms
== 0
2130 && pst
->n_static_syms
== 0)
2132 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2133 it is on the obstack, but we can forget to chain it on the list. */
2134 /* Empty psymtabs happen as a result of header files which don't have
2135 any symbols in them. There can be a lot of them. */
2136 struct partial_symtab
*prev_pst
;
2138 /* First, snip it out of the psymtab chain */
2140 if (pst
->objfile
->psymtabs
== pst
)
2141 pst
->objfile
->psymtabs
= pst
->next
;
2143 for (prev_pst
= pst
->objfile
->psymtabs
; prev_pst
; prev_pst
= pst
->next
)
2144 if (prev_pst
->next
== pst
)
2145 prev_pst
->next
= pst
->next
;
2147 /* Next, put it on a free list for recycling */
2149 pst
->next
= pst
->objfile
->free_psymtabs
;
2150 pst
->objfile
->free_psymtabs
= pst
;
2152 /* Indicate that psymtab was thrown away. */
2153 pst
= (struct partial_symtab
*)NULL
;
2158 static void swap_sym
PARAMS ((struct internal_syment
*,
2159 union internal_auxent
*, char **, char **,
2163 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2164 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2165 the symbol and its auxents. */
2168 swap_sym (symbol
, aux
, name
, raw
, symnump
, objfile
)
2169 struct internal_syment
*symbol
;
2170 union internal_auxent
*aux
;
2173 unsigned int *symnump
;
2174 struct objfile
*objfile
;
2176 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2177 if (symbol
->n_zeroes
)
2179 /* If it's exactly E_SYMNMLEN characters long it isn't
2181 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2183 /* FIXME: wastes memory for symbols which we don't end up putting
2184 into the minimal symbols. */
2186 p
= obstack_alloc (&objfile
->psymbol_obstack
, E_SYMNMLEN
+ 1);
2187 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2188 p
[E_SYMNMLEN
] = '\0';
2192 /* Point to the unswapped name as that persists as long as the
2194 *name
= ((struct external_syment
*)*raw
)->e
.e_name
;
2196 else if (symbol
->n_sclass
& 0x80)
2198 *name
= ((struct coff_symfile_info
*)objfile
->sym_private
)->debugsec
2203 *name
= ((struct coff_symfile_info
*)objfile
->sym_private
)->strtbl
2207 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2208 if (symbol
->n_numaux
> 0)
2210 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2211 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2213 *symnump
+= symbol
->n_numaux
;
2214 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2219 scan_xcoff_symtab (section_offsets
, objfile
)
2220 struct section_offsets
*section_offsets
;
2221 struct objfile
*objfile
;
2223 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2224 char *filestring
= NULL
;
2227 int past_first_source_file
= 0;
2232 /* Current partial symtab */
2233 struct partial_symtab
*pst
;
2235 /* List of current psymtab's include files */
2236 char **psymtab_include_list
;
2237 int includes_allocated
;
2240 /* Index within current psymtab dependency list */
2241 struct partial_symtab
**dependency_list
;
2242 int dependencies_used
, dependencies_allocated
;
2245 struct internal_syment symbol
;
2246 union internal_auxent main_aux
;
2247 unsigned int ssymnum
;
2249 char *last_csect_name
= NULL
; /* last seen csect's name and value */
2250 CORE_ADDR last_csect_val
= 0;
2251 int last_csect_sec
= 0;
2252 int misc_func_recorded
= 0; /* true if any misc. function */
2253 int textlow_not_set
= 1;
2255 pst
= (struct partial_symtab
*) 0;
2257 includes_allocated
= 30;
2259 psymtab_include_list
= (char **) alloca (includes_allocated
*
2262 dependencies_allocated
= 30;
2263 dependencies_used
= 0;
2265 (struct partial_symtab
**) alloca (dependencies_allocated
*
2266 sizeof (struct partial_symtab
*));
2268 last_source_file
= NULL
;
2270 abfd
= objfile
->obfd
;
2272 sraw_symbol
= ((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl
;
2273 nsyms
= ((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl_num_syms
;
2275 while (ssymnum
< nsyms
)
2277 int sclass
= ((struct external_syment
*)sraw_symbol
)->e_sclass
[0] & 0xff;
2278 /* This is the type we pass to partial-stab.h. A less kludgy solution
2279 would be to break out partial-stab.h into its various parts--shuffle
2280 off the DBXREAD_ONLY stuff to dbxread.c, and make separate
2281 pstab-norm.h (for most types), pstab-sol.h (for N_SOL), etc. */
2291 /* The CSECT auxent--always the last auxent. */
2292 union internal_auxent csect_aux
;
2293 unsigned int symnum_before
= ssymnum
;
2295 swap_sym (&symbol
, &main_aux
, &namestring
, &sraw_symbol
,
2297 if (symbol
.n_numaux
> 1)
2299 bfd_coff_swap_aux_in
2301 sraw_symbol
- coff_data(abfd
)->local_symesz
,
2304 symbol
.n_numaux
- 1,
2309 csect_aux
= main_aux
;
2311 /* If symbol name starts with ".$" or "$", ignore it. */
2312 if (namestring
[0] == '$'
2313 || (namestring
[0] == '.' && namestring
[1] == '$'))
2316 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2319 switch (csect_aux
.x_csect
.x_smclas
)
2322 if (last_csect_name
)
2324 /* If no misc. function recorded in the last
2325 seen csect, enter it as a function. This
2326 will take care of functions like strcmp()
2329 if (!misc_func_recorded
)
2331 RECORD_MINIMAL_SYMBOL
2332 (last_csect_name
, last_csect_val
,
2333 mst_text
, last_csect_sec
,
2339 /* We have to allocate one psymtab for
2340 each program csect, because their text
2341 sections need not be adjacent. */
2343 (pst
, psymtab_include_list
, includes_used
,
2344 symnum_before
, dependency_list
,
2345 dependencies_used
, textlow_not_set
);
2347 dependencies_used
= 0;
2348 /* Give all psymtabs for this source file the same
2350 pst
= xcoff_start_psymtab
2351 (objfile
, section_offsets
,
2354 objfile
->global_psymbols
.next
,
2355 objfile
->static_psymbols
.next
);
2358 if (namestring
&& namestring
[0] == '.')
2360 last_csect_name
= namestring
;
2361 last_csect_val
= symbol
.n_value
;
2363 secnum_to_section (symbol
.n_scnum
, objfile
);
2368 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2369 if (highval
> pst
->texthigh
)
2370 pst
->texthigh
= highval
;
2371 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2372 pst
->textlow
= symbol
.n_value
;
2374 misc_func_recorded
= 0;
2378 /* Data variables are recorded in the minimal symbol
2379 table, except for section symbols. */
2380 if (*namestring
!= '.')
2381 prim_record_minimal_symbol_and_info
2382 (namestring
, symbol
.n_value
,
2383 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2384 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2390 warning ("More than one XMC_TC0 symbol found.");
2391 toc_offset
= symbol
.n_value
;
2393 /* Make TOC offset relative to start address of section. */
2394 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2396 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2400 /* These symbols tell us where the TOC entry for a
2401 variable is, not the variable itself. */
2410 switch (csect_aux
.x_csect
.x_smclas
)
2413 /* A function entry point. */
2415 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2416 first_fun_line_offset
=
2417 main_aux
.x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2418 RECORD_MINIMAL_SYMBOL
2419 (namestring
, symbol
.n_value
,
2420 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2421 secnum_to_section (symbol
.n_scnum
, objfile
),
2426 /* shared library function trampoline code entry
2429 /* record trampoline code entries as
2430 mst_solib_trampoline symbol. When we lookup mst
2431 symbols, we will choose mst_text over
2432 mst_solib_trampoline. */
2433 RECORD_MINIMAL_SYMBOL
2434 (namestring
, symbol
.n_value
,
2435 mst_solib_trampoline
,
2436 secnum_to_section (symbol
.n_scnum
, objfile
),
2441 /* The symbols often have the same names as
2442 debug symbols for functions, and confuse
2448 /* xlc puts each variable in a separate csect,
2449 so we get an XTY_SD for each variable. But
2450 gcc puts several variables in a csect, so
2451 that each variable only gets an XTY_LD. We
2452 still need to record them. This will
2453 typically be XMC_RW; I suspect XMC_RO and
2454 XMC_BS might be possible too. */
2455 if (*namestring
!= '.')
2456 prim_record_minimal_symbol_and_info
2457 (namestring
, symbol
.n_value
,
2458 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2459 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2466 switch (csect_aux
.x_csect
.x_smclas
)
2470 /* Common variables are recorded in the minimal symbol
2471 table, except for section symbols. */
2472 if (*namestring
!= '.')
2473 prim_record_minimal_symbol_and_info
2474 (namestring
, symbol
.n_value
,
2475 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2476 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2489 unsigned int symnum_before
;
2491 symnum_before
= ssymnum
;
2492 swap_sym (&symbol
, &main_aux
, &namestring
, &sraw_symbol
,
2495 /* See if the last csect needs to be recorded. */
2497 if (last_csect_name
&& !misc_func_recorded
)
2500 /* If no misc. function recorded in the last seen csect, enter
2501 it as a function. This will take care of functions like
2502 strcmp() compiled by xlc. */
2504 RECORD_MINIMAL_SYMBOL
2505 (last_csect_name
, last_csect_val
,
2506 mst_text
, last_csect_sec
, objfile
);
2511 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2512 symnum_before
, dependency_list
,
2513 dependencies_used
, textlow_not_set
);
2515 dependencies_used
= 0;
2517 first_fun_line_offset
= 0;
2519 /* XCOFF, according to the AIX 3.2 documentation, puts the
2520 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2521 do things the standard COFF way and put it in the auxent.
2522 We use the auxent if the symbol is ".file" and an auxent
2523 exists, otherwise use the symbol itself. */
2524 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2526 filestring
= coff_getfilename (&main_aux
, objfile
);
2529 filestring
= namestring
;
2531 pst
= xcoff_start_psymtab (objfile
, section_offsets
,
2534 objfile
->global_psymbols
.next
,
2535 objfile
->static_psymbols
.next
);
2536 last_csect_name
= NULL
;
2542 static struct complaint msg
=
2543 {"Storage class %d not recognized during scan", 0, 0};
2544 complain (&msg
, sclass
);
2548 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2549 to handle only the C_FUN and C_EXT. */
2564 /* C_EINCL means we are switching back to the main file. But there
2565 is no reason to care; the only thing we want to know about
2566 includes is the names of all the included (.h) files. */
2571 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2575 /* I don't think the name of the common block (as opposed to the
2576 variables within it) is something which is user visible
2584 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2585 so C_LSYM would appear to be only for locals. */
2591 /* We probably could save a few instructions by assuming that
2592 C_LSYM, C_PSYM, etc., never have auxents. */
2594 ((struct external_syment
*)sraw_symbol
)->e_numaux
[0] + 1;
2596 sraw_symbol
+= sizeof (struct external_syment
) * naux1
;
2605 /* The value of the C_FUN is not the address of the function (it
2606 appears to be the address before linking), but as long as it
2607 is smaller than the actual address, then find_pc_partial_function
2608 will use the minimal symbols instead. I hope. */
2616 swap_sym (&symbol
, &main_aux
, &namestring
, &sraw_symbol
,
2618 #define CUR_SYMBOL_TYPE stype
2619 #define CUR_SYMBOL_VALUE symbol.n_value
2621 /* START_PSYMTAB and END_PSYMTAB are never used, because they are only
2622 called from DBXREAD_ONLY or N_SO code. Likewise for the symnum
2624 #define START_PSYMTAB(ofile,secoff,fname,low,symoff,global_syms,static_syms) 0
2625 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
2627 /* We have already set the namestring. */
2628 #define SET_NAMESTRING() /* */
2630 #include "partial-stab.h"
2636 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2637 ssymnum
, dependency_list
,
2638 dependencies_used
, textlow_not_set
);
2641 /* Record the toc offset value of this symbol table into ldinfo structure.
2642 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2643 this information would be file auxiliary header. */
2645 if (xcoff_add_toc_to_loadinfo_hook
!= NULL
)
2646 (*xcoff_add_toc_to_loadinfo_hook
) ((unsigned long) toc_offset
);
2649 /* Scan and build partial symbols for a symbol file.
2650 We have been initialized by a call to dbx_symfile_init, which
2651 put all the relevant info into a "struct dbx_symfile_info",
2652 hung off the objfile structure.
2654 SECTION_OFFSETS contains offsets relative to which the symbols in the
2655 various sections are (depending where the sections were actually loaded).
2656 MAINLINE is true if we are reading the main symbol
2657 table (as opposed to a shared lib or dynamically loaded file). */
2660 xcoff_initial_scan (objfile
, section_offsets
, mainline
)
2661 struct objfile
*objfile
;
2662 struct section_offsets
*section_offsets
;
2663 int mainline
; /* FIXME comments above */
2667 struct cleanup
*back_to
;
2668 int num_symbols
; /* # of symbols */
2669 file_ptr symtab_offset
; /* symbol table and */
2670 file_ptr stringtab_offset
; /* string table file offsets */
2671 struct coff_symfile_info
*info
;
2675 /* Initialize load info structure. */
2676 if (mainline
&& xcoff_init_loadinfo_hook
!= NULL
)
2677 (*xcoff_init_loadinfo_hook
) ();
2679 info
= (struct coff_symfile_info
*) objfile
-> sym_private
;
2680 symfile_bfd
= abfd
= objfile
->obfd
;
2681 name
= objfile
->name
;
2683 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2684 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2685 stringtab_offset
= symtab_offset
+
2686 num_symbols
* coff_data(abfd
)->local_symesz
;
2688 info
->min_lineno_offset
= 0;
2689 info
->max_lineno_offset
= 0;
2690 bfd_map_over_sections (abfd
, find_linenos
, info
);
2692 if (num_symbols
> 0)
2694 /* Read the string table. */
2695 init_stringtab (abfd
, stringtab_offset
, objfile
);
2697 /* Read the .debug section, if present. */
2700 bfd_size_type length
;
2701 char *debugsec
= NULL
;
2703 secp
= bfd_get_section_by_name (abfd
, ".debug");
2706 length
= bfd_section_size (abfd
, secp
);
2710 (char *) obstack_alloc (&objfile
->symbol_obstack
, length
);
2712 if (!bfd_get_section_contents (abfd
, secp
, debugsec
,
2713 (file_ptr
) 0, length
))
2715 error ("Error reading .debug section of `%s': %s",
2716 name
, bfd_errmsg (bfd_get_error ()));
2720 ((struct coff_symfile_info
*)objfile
->sym_private
)->debugsec
=
2725 /* Read the symbols. We keep them in core because we will want to
2726 access them randomly in read_symbol*. */
2727 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2729 error ("Error reading symbols from %s: %s",
2730 name
, bfd_errmsg (bfd_get_error ()));
2731 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2732 ((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl
=
2733 obstack_alloc (&objfile
->symbol_obstack
, size
);
2734 ((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl_num_syms
=
2737 val
= bfd_read (((struct coff_symfile_info
*)objfile
->sym_private
)->symtbl
,
2740 perror_with_name ("reading symbol table");
2742 /* If we are reinitializing, or if we have never loaded syms yet, init */
2744 || objfile
->global_psymbols
.size
== 0
2745 || objfile
->static_psymbols
.size
== 0)
2746 /* I'm not sure how how good num_symbols is; the rule of thumb in
2747 init_psymbol_list was developed for a.out. On the one hand,
2748 num_symbols includes auxents. On the other hand, it doesn't
2750 init_psymbol_list (objfile
, num_symbols
);
2752 free_pending_blocks ();
2753 back_to
= make_cleanup (really_free_pendings
, 0);
2755 init_minimal_symbol_collection ();
2756 make_cleanup (discard_minimal_symbols
, 0);
2758 /* Now that the symbol table data of the executable file are all in core,
2759 process them and define symbols accordingly. */
2761 scan_xcoff_symtab (section_offsets
, objfile
);
2763 /* Install any minimal symbols that have been collected as the current
2764 minimal symbols for this objfile. */
2766 install_minimal_symbols (objfile
);
2768 do_cleanups (back_to
);
2771 static struct section_offsets
*
2772 xcoff_symfile_offsets (objfile
, addr
)
2773 struct objfile
*objfile
;
2776 struct section_offsets
*section_offsets
;
2779 objfile
->num_sections
= SECT_OFF_MAX
;
2780 section_offsets
= (struct section_offsets
*)
2782 (&objfile
-> psymbol_obstack
,
2783 sizeof (struct section_offsets
)
2784 + sizeof (section_offsets
->offsets
) * objfile
->num_sections
);
2786 /* syms_from_objfile kindly subtracts from addr the bfd_section_vma
2787 of the .text section. This strikes me as wrong--whether the
2788 offset to be applied to symbol reading is relative to the start
2789 address of the section depends on the symbol format. In any
2790 event, this whole "addr" concept is pretty broken (it doesn't
2791 handle any section but .text sensibly), so just ignore the addr
2792 parameter and use 0. rs6000-nat.c will set the correct section
2793 offsets via objfile_relocate. */
2794 for (i
= 0; i
< objfile
->num_sections
; ++i
)
2795 ANOFFSET (section_offsets
, i
) = 0;
2797 return section_offsets
;
2800 /* Register our ability to parse symbols for xcoff BFD files. */
2802 static struct sym_fns xcoff_sym_fns
=
2805 /* Because the bfd uses coff_flavour, we need to specially kludge
2806 the flavour. It is possible that coff and xcoff should be merged as
2807 they do have fundamental similarities (for example, the extra storage
2808 classes used for stabs could presumably be recognized in any COFF file).
2809 However, in addition to obvious things like all the csect hair, there are
2810 some subtler differences between xcoffread.c and coffread.c, notably
2811 the fact that coffread.c has no need to read in all the symbols, but
2812 xcoffread.c reads all the symbols and does in fact randomly access them
2813 (in C_BSTAT and line number processing). */
2815 (enum bfd_flavour
)-1,
2817 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2818 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2819 xcoff_initial_scan
, /* sym_read: read a symbol file into symtab */
2820 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2821 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
2822 NULL
/* next: pointer to next struct sym_fns */
2826 _initialize_xcoffread ()
2828 add_symtab_fns(&xcoff_sym_fns
);
2830 func_symbol_type
= init_type (TYPE_CODE_FUNC
, 1, 0,
2831 "<function, no debug info>", NULL
);
2832 TYPE_TARGET_TYPE (func_symbol_type
) = builtin_type_int
;
2834 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ HOST_CHAR_BIT
, 0,
2835 "<variable, no debug info>", NULL
);