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,
22 Boston, MA 02111-1307, USA. */
27 #include <sys/types.h>
30 #include "gdb_string.h"
32 #include <sys/param.h>
38 #include "coff/internal.h"
39 #include "libcoff.h" /* FIXME, internal data from BFD */
40 #include "coff/rs6000.h"
47 #include "stabsread.h"
48 #include "expression.h"
49 #include "language.h" /* Needed inside partial-stab.h */
50 #include "complaints.h"
52 #include "gdb-stabs.h"
54 /* For interface with stabsread.c. */
55 #include "aout/stab_gnu.h"
57 /* For interface with partial-stab.h. */
58 #define N_UNDF 0 /* Undefined symbol */
61 #define N_TEXT 4 /* Text sym -- defined at offset in text seg */
62 #define N_DATA 6 /* Data sym -- defined at offset in data seg */
63 #define N_BSS 8 /* BSS sym -- defined at offset in zero'd seg */
64 #define N_COMM 0x12 /* Common symbol (visible after shared lib dynlink) */
65 #define N_FN 0x1f /* File name of .o file */
66 #define N_FN_SEQ 0x0C /* N_FN from Sequent compilers (sigh) */
67 /* Note: N_EXT can only be usefully OR-ed with N_UNDF, N_ABS, N_TEXT,
68 N_DATA, or N_BSS. When the low-order bit of other types is set,
69 (e.g. N_WARNING versus N_FN), they are two different types. */
70 #define N_EXT 1 /* External symbol (as opposed to local-to-this-file) */
73 /* The following symbols refer to set elements.
74 All the N_SET[ATDB] symbols with the same name form one set.
75 Space is allocated for the set in the text section, and each set
76 elements value is stored into one word of the space.
77 The first word of the space is the length of the set (number of elements).
79 The address of the set is made into an N_SETV symbol
80 whose name is the same as the name of the set.
81 This symbol acts like a N_DATA global symbol
82 in that it can satisfy undefined external references. */
84 /* These appear as input to LD, in a .o file. */
85 #define N_SETA 0x14 /* Absolute set element symbol */
86 #define N_SETT 0x16 /* Text set element symbol */
87 #define N_SETD 0x18 /* Data set element symbol */
88 #define N_SETB 0x1A /* Bss set element symbol */
90 /* This is output from LD. */
91 #define N_SETV 0x1C /* Pointer to set vector in data area. */
93 /* We put a pointer to this structure in the read_symtab_private field
99 /* First symbol number for this file. */
103 /* Number of symbols in the section of the symbol table devoted to
104 this file's symbols (actually, the section bracketed may contain
105 more than just this file's symbols). If numsyms is 0, the only
106 reason for this thing's existence is the dependency list. Nothing
107 else will happen when it is read in. */
111 /* Position of the start of the line number information for this psymtab. */
112 unsigned int lineno_off
;
115 /* Remember what we deduced to be the source language of this psymtab. */
117 static enum language psymtab_language
= language_unknown
;
120 /* Simplified internal version of coff symbol table information */
125 int c_symnum
; /* symbol number of this entry */
126 int c_naux
; /* 0 if syment only, 1 if syment + auxent */
128 unsigned char c_sclass
;
133 /* last function's saved coff symbol `cs' */
135 static struct coff_symbol fcn_cs_saved
;
137 static bfd
*symfile_bfd
;
139 /* Core address of start and end of text of current source file.
140 This is calculated from the first function seen after a C_FILE
144 static CORE_ADDR cur_src_end_addr
;
146 /* Core address of the end of the first object file. */
148 static CORE_ADDR first_object_file_end
;
150 /* initial symbol-table-debug-string vector length */
152 #define INITIAL_STABVECTOR_LENGTH 40
154 /* Nonzero if within a function (so symbols should be local,
155 if nothing says specifically). */
159 /* Size of a COFF symbol. I think it is always 18, so I'm not sure
160 there is any reason not to just use a #define, but might as well
161 ask BFD for the size and store it here, I guess. */
163 static unsigned local_symesz
;
165 struct coff_symfile_info
167 file_ptr min_lineno_offset
; /* Where in file lowest line#s are */
168 file_ptr max_lineno_offset
; /* 1+last byte of line#s in file */
170 /* Pointer to the string table. */
173 /* Pointer to debug section. */
176 /* Pointer to the a.out symbol table. */
179 /* Number of symbols in symtbl. */
182 /* Offset in data section to TOC anchor. */
183 CORE_ADDR toc_offset
;
186 static struct complaint storclass_complaint
=
187 {"Unexpected storage class: %d", 0, 0};
189 static struct complaint bf_notfound_complaint
=
190 {"line numbers off, `.bf' symbol not found", 0, 0};
192 static struct complaint ef_complaint
=
193 {"Mismatched .ef symbol ignored starting at symnum %d", 0, 0};
195 static struct complaint eb_complaint
=
196 {"Mismatched .eb symbol ignored starting at symnum %d", 0, 0};
198 static void xcoff_initial_scan (struct objfile
*, int);
200 static void scan_xcoff_symtab (struct objfile
*);
202 static char *xcoff_next_symbol_text (struct objfile
*);
204 static void record_include_begin (struct coff_symbol
*);
207 enter_line_range (struct subfile
*, unsigned, unsigned,
208 CORE_ADDR
, CORE_ADDR
, unsigned *);
210 static void init_stringtab (bfd
*, file_ptr
, struct objfile
*);
212 static void xcoff_symfile_init (struct objfile
*);
214 static void xcoff_new_init (struct objfile
*);
216 static void xcoff_symfile_finish (struct objfile
*);
219 xcoff_symfile_offsets (struct objfile
*, struct section_addr_info
*addrs
);
221 static void find_linenos (bfd
*, sec_ptr
, PTR
);
223 static char *coff_getfilename (union internal_auxent
*, struct objfile
*);
225 static void read_symbol (struct internal_syment
*, int);
227 static int read_symbol_lineno (int);
229 static int read_symbol_nvalue (int);
231 static struct symbol
*process_xcoff_symbol (struct coff_symbol
*,
234 static void read_xcoff_symtab (struct partial_symtab
*);
237 static void add_stab_to_list (char *, struct pending_stabs
**);
240 static int compare_lte (const void *, const void *);
242 static struct linetable
*arrange_linetable (struct linetable
*);
244 static void record_include_end (struct coff_symbol
*);
246 static void process_linenos (CORE_ADDR
, CORE_ADDR
);
249 /* Translate from a COFF section number (target_index) to a SECT_OFF_*
251 static int secnum_to_section (int, struct objfile
*);
252 static asection
*secnum_to_bfd_section (int, struct objfile
*);
254 struct find_targ_sec_arg
259 struct objfile
*objfile
;
262 static void find_targ_sec (bfd
*, asection
*, void *);
265 find_targ_sec (abfd
, sect
, obj
)
270 struct find_targ_sec_arg
*args
= (struct find_targ_sec_arg
*) obj
;
271 struct objfile
*objfile
= args
->objfile
;
272 if (sect
->target_index
== args
->targ_index
)
274 /* This is the section. Figure out what SECT_OFF_* code it is. */
275 if (bfd_get_section_flags (abfd
, sect
) & SEC_CODE
)
276 *args
->resultp
= SECT_OFF_TEXT (objfile
);
277 else if (bfd_get_section_flags (abfd
, sect
) & SEC_LOAD
)
278 *args
->resultp
= SECT_OFF_DATA (objfile
);
280 *args
->resultp
= SECT_OFF_BSS (objfile
);
281 *args
->bfd_sect
= sect
;
285 /* Return the section number (SECT_OFF_*) that CS points to. */
287 secnum_to_section (secnum
, objfile
)
289 struct objfile
*objfile
;
291 int off
= SECT_OFF_TEXT (objfile
);
292 asection
*sect
= NULL
;
293 struct find_targ_sec_arg args
;
294 args
.targ_index
= secnum
;
296 args
.bfd_sect
= §
;
297 args
.objfile
= objfile
;
298 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
302 /* Return the BFD section that CS points to. */
304 secnum_to_bfd_section (secnum
, objfile
)
306 struct objfile
*objfile
;
308 int off
= SECT_OFF_TEXT (objfile
);
309 asection
*sect
= NULL
;
310 struct find_targ_sec_arg args
;
311 args
.targ_index
= secnum
;
313 args
.bfd_sect
= §
;
314 bfd_map_over_sections (objfile
->obfd
, find_targ_sec
, &args
);
318 /* add a given stab string into given stab vector. */
323 add_stab_to_list (stabname
, stabvector
)
325 struct pending_stabs
**stabvector
;
327 if (*stabvector
== NULL
)
329 *stabvector
= (struct pending_stabs
*)
330 xmalloc (sizeof (struct pending_stabs
) +
331 INITIAL_STABVECTOR_LENGTH
* sizeof (char *));
332 (*stabvector
)->count
= 0;
333 (*stabvector
)->length
= INITIAL_STABVECTOR_LENGTH
;
335 else if ((*stabvector
)->count
>= (*stabvector
)->length
)
337 (*stabvector
)->length
+= INITIAL_STABVECTOR_LENGTH
;
338 *stabvector
= (struct pending_stabs
*)
339 xrealloc ((char *) *stabvector
, sizeof (struct pending_stabs
) +
340 (*stabvector
)->length
* sizeof (char *));
342 (*stabvector
)->stab
[(*stabvector
)->count
++] = stabname
;
347 /* Linenos are processed on a file-by-file basis.
351 1) xlc (IBM's native c compiler) postpones static function code
352 emission to the end of a compilation unit. This way it can
353 determine if those functions (statics) are needed or not, and
354 can do some garbage collection (I think). This makes line
355 numbers and corresponding addresses unordered, and we end up
356 with a line table like:
373 and that breaks gdb's binary search on line numbers, if the
374 above table is not sorted on line numbers. And that sort
375 should be on function based, since gcc can emit line numbers
378 10 0x100 - for the init/test part of a for stmt.
381 10 0x400 - for the increment part of a for stmt.
383 arrange_linetable() will do this sorting.
385 2) aix symbol table might look like:
387 c_file // beginning of a new file
388 .bi // beginning of include file
389 .ei // end of include file
393 basically, .bi/.ei pairs do not necessarily encapsulate
394 their scope. They need to be recorded, and processed later
395 on when we come the end of the compilation unit.
396 Include table (inclTable) and process_linenos() handle
402 /* compare line table entry addresses. */
405 compare_lte (lte1p
, lte2p
)
409 struct linetable_entry
*lte1
= (struct linetable_entry
*) lte1p
;
410 struct linetable_entry
*lte2
= (struct linetable_entry
*) lte2p
;
411 return lte1
->pc
- lte2
->pc
;
414 /* Given a line table with function entries are marked, arrange its functions
415 in ascending order and strip off function entry markers and return it in
416 a newly created table. If the old one is good enough, return the old one. */
417 /* FIXME: I think all this stuff can be replaced by just passing
418 sort_linevec = 1 to end_symtab. */
420 static struct linetable
*
421 arrange_linetable (oldLineTb
)
422 struct linetable
*oldLineTb
; /* old linetable */
424 int ii
, jj
, newline
, /* new line count */
425 function_count
; /* # of functions */
427 struct linetable_entry
*fentry
; /* function entry vector */
428 int fentry_size
; /* # of function entries */
429 struct linetable
*newLineTb
; /* new line table */
431 #define NUM_OF_FUNCTIONS 20
433 fentry_size
= NUM_OF_FUNCTIONS
;
434 fentry
= (struct linetable_entry
*)
435 xmalloc (fentry_size
* sizeof (struct linetable_entry
));
437 for (function_count
= 0, ii
= 0; ii
< oldLineTb
->nitems
; ++ii
)
440 if (oldLineTb
->item
[ii
].line
== 0)
441 { /* function entry found. */
443 if (function_count
>= fentry_size
)
444 { /* make sure you have room. */
446 fentry
= (struct linetable_entry
*)
447 xrealloc (fentry
, fentry_size
* sizeof (struct linetable_entry
));
449 fentry
[function_count
].line
= ii
;
450 fentry
[function_count
].pc
= oldLineTb
->item
[ii
].pc
;
455 if (function_count
== 0)
460 else if (function_count
> 1)
461 qsort (fentry
, function_count
, sizeof (struct linetable_entry
), compare_lte
);
463 /* allocate a new line table. */
464 newLineTb
= (struct linetable
*)
466 (sizeof (struct linetable
) +
467 (oldLineTb
->nitems
- function_count
) * sizeof (struct linetable_entry
));
469 /* if line table does not start with a function beginning, copy up until
473 if (oldLineTb
->item
[0].line
!= 0)
475 newline
< oldLineTb
->nitems
&& oldLineTb
->item
[newline
].line
; ++newline
)
476 newLineTb
->item
[newline
] = oldLineTb
->item
[newline
];
478 /* Now copy function lines one by one. */
480 for (ii
= 0; ii
< function_count
; ++ii
)
482 for (jj
= fentry
[ii
].line
+ 1;
483 jj
< oldLineTb
->nitems
&& oldLineTb
->item
[jj
].line
!= 0;
485 newLineTb
->item
[newline
] = oldLineTb
->item
[jj
];
488 newLineTb
->nitems
= oldLineTb
->nitems
- function_count
;
492 /* include file support: C_BINCL/C_EINCL pairs will be kept in the
493 following `IncludeChain'. At the end of each symtab (end_symtab),
494 we will determine if we should create additional symtab's to
495 represent if (the include files. */
498 typedef struct _inclTable
500 char *name
; /* include filename */
502 /* Offsets to the line table. end points to the last entry which is
503 part of this include file. */
506 struct subfile
*subfile
;
507 unsigned funStartLine
; /* start line # of its function */
511 #define INITIAL_INCLUDE_TABLE_LENGTH 20
512 static InclTable
*inclTable
; /* global include table */
513 static int inclIndx
; /* last entry to table */
514 static int inclLength
; /* table length */
515 static int inclDepth
; /* nested include depth */
517 static void allocate_include_entry (void);
520 record_include_begin (cs
)
521 struct coff_symbol
*cs
;
525 /* In xcoff, we assume include files cannot be nested (not in .c files
526 of course, but in corresponding .s files.). */
528 /* This can happen with old versions of GCC.
529 GCC 2.3.3-930426 does not exhibit this on a test case which
530 a user said produced the message for him. */
531 static struct complaint msg
=
532 {"Nested C_BINCL symbols", 0, 0};
537 allocate_include_entry ();
539 inclTable
[inclIndx
].name
= cs
->c_name
;
540 inclTable
[inclIndx
].begin
= cs
->c_value
;
544 record_include_end (cs
)
545 struct coff_symbol
*cs
;
551 static struct complaint msg
=
552 {"Mismatched C_BINCL/C_EINCL pair", 0, 0};
556 allocate_include_entry ();
558 pTbl
= &inclTable
[inclIndx
];
559 pTbl
->end
= cs
->c_value
;
566 allocate_include_entry ()
568 if (inclTable
== NULL
)
570 inclTable
= (InclTable
*)
571 xmalloc (sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
573 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
574 inclLength
= INITIAL_INCLUDE_TABLE_LENGTH
;
577 else if (inclIndx
>= inclLength
)
579 inclLength
+= INITIAL_INCLUDE_TABLE_LENGTH
;
580 inclTable
= (InclTable
*)
581 xrealloc (inclTable
, sizeof (InclTable
) * inclLength
);
582 memset (inclTable
+ inclLength
- INITIAL_INCLUDE_TABLE_LENGTH
,
583 '\0', sizeof (InclTable
) * INITIAL_INCLUDE_TABLE_LENGTH
);
587 /* Global variable to pass the psymtab down to all the routines involved
588 in psymtab to symtab processing. */
589 static struct partial_symtab
*this_symtab_psymtab
;
591 /* given the start and end addresses of a compilation unit (or a csect,
592 at times) process its lines and create appropriate line vectors. */
595 process_linenos (start
, end
)
596 CORE_ADDR start
, end
;
599 file_ptr max_offset
=
600 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->sym_private
)
603 /* subfile structure for the main compilation unit. */
604 struct subfile main_subfile
;
606 /* In the main source file, any time we see a function entry, we
607 reset this variable to function's absolute starting line number.
608 All the following line numbers in the function are relative to
609 this, and we record absolute line numbers in record_line(). */
611 unsigned int main_source_baseline
= 0;
616 ((struct symloc
*) this_symtab_psymtab
->read_symtab_private
)->lineno_off
;
618 goto return_after_cleanup
;
620 memset (&main_subfile
, '\0', sizeof (main_subfile
));
623 /* All source lines were in the main source file. None in include files. */
625 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
626 &main_source_baseline
);
630 /* There was source with line numbers in include files. */
631 main_source_baseline
= 0;
632 for (ii
= 0; ii
< inclIndx
; ++ii
)
634 struct subfile
*tmpSubfile
;
636 /* If there is main file source before include file, enter it. */
637 if (offset
< inclTable
[ii
].begin
)
640 (&main_subfile
, offset
, inclTable
[ii
].begin
- LINESZ
,
641 start
, 0, &main_source_baseline
);
644 /* Have a new subfile for the include file. */
646 tmpSubfile
= inclTable
[ii
].subfile
=
647 (struct subfile
*) xmalloc (sizeof (struct subfile
));
649 memset (tmpSubfile
, '\0', sizeof (struct subfile
));
650 firstLine
= &(inclTable
[ii
].funStartLine
);
652 /* Enter include file's lines now. */
653 enter_line_range (tmpSubfile
, inclTable
[ii
].begin
,
654 inclTable
[ii
].end
, start
, 0, firstLine
);
656 if (offset
<= inclTable
[ii
].end
)
657 offset
= inclTable
[ii
].end
+ LINESZ
;
660 /* All the include files' line have been processed at this point. Now,
661 enter remaining lines of the main file, if any left. */
662 if (offset
< max_offset
+ 1 - LINESZ
)
664 enter_line_range (&main_subfile
, offset
, 0, start
, end
,
665 &main_source_baseline
);
669 /* Process main file's line numbers. */
670 if (main_subfile
.line_vector
)
672 struct linetable
*lineTb
, *lv
;
674 lv
= main_subfile
.line_vector
;
676 /* Line numbers are not necessarily ordered. xlc compilation will
677 put static function to the end. */
679 lineTb
= arrange_linetable (lv
);
682 current_subfile
->line_vector
= (struct linetable
*)
683 xrealloc (lv
, (sizeof (struct linetable
)
684 + lv
->nitems
* sizeof (struct linetable_entry
)));
689 current_subfile
->line_vector
= lineTb
;
692 current_subfile
->line_vector_length
=
693 current_subfile
->line_vector
->nitems
;
696 /* Now, process included files' line numbers. */
698 for (ii
= 0; ii
< inclIndx
; ++ii
)
700 if ((inclTable
[ii
].subfile
)->line_vector
) /* Useless if!!! FIXMEmgo */
702 struct linetable
*lineTb
, *lv
;
704 lv
= (inclTable
[ii
].subfile
)->line_vector
;
706 /* Line numbers are not necessarily ordered. xlc compilation will
707 put static function to the end. */
709 lineTb
= arrange_linetable (lv
);
713 /* For the same include file, we might want to have more than one
714 subfile. This happens if we have something like:
722 while foo.h including code in it. (stupid but possible)
723 Since start_subfile() looks at the name and uses an
724 existing one if finds, we need to provide a fake name and
728 start_subfile (inclTable
[ii
].name
, (char *) 0);
731 /* Pick a fake name that will produce the same results as this
732 one when passed to deduce_language_from_filename. Kludge on
734 char *fakename
= strrchr (inclTable
[ii
].name
, '.');
735 if (fakename
== NULL
)
737 start_subfile (fakename
, (char *) 0);
738 free (current_subfile
->name
);
740 current_subfile
->name
= xstrdup (inclTable
[ii
].name
);
745 current_subfile
->line_vector
=
746 (struct linetable
*) xrealloc
747 (lv
, (sizeof (struct linetable
)
748 + lv
->nitems
* sizeof (struct linetable_entry
)));
754 current_subfile
->line_vector
= lineTb
;
757 current_subfile
->line_vector_length
=
758 current_subfile
->line_vector
->nitems
;
759 start_subfile (pop_subfile (), (char *) 0);
763 return_after_cleanup
:
765 /* We don't want to keep alloc/free'ing the global include file table. */
768 /* Start with a fresh subfile structure for the next file. */
769 memset (&main_subfile
, '\0', sizeof (struct subfile
));
773 aix_process_linenos ()
775 /* process line numbers and enter them into line vector */
776 process_linenos (last_source_start_addr
, cur_src_end_addr
);
780 /* Enter a given range of lines into the line vector.
781 can be called in the following two ways:
782 enter_line_range (subfile, beginoffset, endoffset, startaddr, 0, firstLine) or
783 enter_line_range (subfile, beginoffset, 0, startaddr, endaddr, firstLine)
785 endoffset points to the last line table entry that we should pay
789 enter_line_range (subfile
, beginoffset
, endoffset
, startaddr
, endaddr
,
791 struct subfile
*subfile
;
792 unsigned beginoffset
, endoffset
; /* offsets to line table */
793 CORE_ADDR startaddr
, endaddr
;
796 unsigned int curoffset
;
798 struct external_lineno ext_lnno
;
799 struct internal_lineno int_lnno
;
800 unsigned int limit_offset
;
803 if (endoffset
== 0 && startaddr
== 0 && endaddr
== 0)
805 curoffset
= beginoffset
;
807 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->sym_private
)
812 if (endoffset
>= limit_offset
)
814 static struct complaint msg
=
815 {"Bad line table offset in C_EINCL directive", 0, 0};
819 limit_offset
= endoffset
;
823 abfd
= this_symtab_psymtab
->objfile
->obfd
;
825 while (curoffset
<= limit_offset
)
827 bfd_seek (abfd
, curoffset
, SEEK_SET
);
828 bfd_read (&ext_lnno
, sizeof (struct external_lineno
), 1, abfd
);
829 bfd_coff_swap_lineno_in (abfd
, &ext_lnno
, &int_lnno
);
831 /* Find the address this line represents. */
832 addr
= (int_lnno
.l_lnno
833 ? int_lnno
.l_addr
.l_paddr
834 : read_symbol_nvalue (int_lnno
.l_addr
.l_symndx
));
835 addr
+= ANOFFSET (this_symtab_psymtab
->objfile
->section_offsets
,
836 SECT_OFF_TEXT (this_symtab_psymtab
->objfile
));
838 if (addr
< startaddr
|| (endaddr
&& addr
>= endaddr
))
841 if (int_lnno
.l_lnno
== 0)
843 *firstLine
= read_symbol_lineno (int_lnno
.l_addr
.l_symndx
);
844 record_line (subfile
, 0, addr
);
848 record_line (subfile
, *firstLine
+ int_lnno
.l_lnno
, addr
);
854 /* Save the vital information for use when closing off the current file.
855 NAME is the file name the symbols came from, START_ADDR is the first
856 text address for the file, and SIZE is the number of bytes of text. */
858 #define complete_symtab(name, start_addr) { \
859 last_source_file = savestring (name, strlen (name)); \
860 last_source_start_addr = start_addr; \
864 /* Refill the symbol table input buffer
865 and set the variables that control fetching entries from it.
866 Reports an error if no data available.
867 This function can read past the end of the symbol table
868 (into the string table) but this does no harm. */
870 /* Reading symbol table has to be fast! Keep the followings as macros, rather
873 #define RECORD_MINIMAL_SYMBOL(NAME, ADDR, TYPE, SECTION, OBJFILE) \
877 if (namestr[0] == '.') ++namestr; \
878 prim_record_minimal_symbol_and_info (namestr, (ADDR), (TYPE), \
879 (char *)NULL, (SECTION), (asection *)NULL, (OBJFILE)); \
880 misc_func_recorded = 1; \
884 /* xcoff has static blocks marked in `.bs', `.es' pairs. They cannot be
885 nested. At any given time, a symbol can only be in one static block.
886 This is the base address of current static block, zero if non exists. */
888 static int static_block_base
= 0;
890 /* Section number for the current static block. */
892 static int static_block_section
= -1;
894 /* true if space for symbol name has been allocated. */
896 static int symname_alloced
= 0;
898 /* Next symbol to read. Pointer into raw seething symbol table. */
900 static char *raw_symbol
;
902 /* This is the function which stabsread.c calls to get symbol
906 xcoff_next_symbol_text (objfile
)
907 struct objfile
*objfile
;
909 struct internal_syment symbol
;
910 static struct complaint msg
=
911 {"Unexpected symbol continuation", 0, 0};
913 /* FIXME: is this the same as the passed arg? */
914 objfile
= this_symtab_psymtab
->objfile
;
916 bfd_coff_swap_sym_in (objfile
->obfd
, raw_symbol
, &symbol
);
921 /* Return something which points to '\0' and hope the symbol reading
922 code does something reasonable. */
925 else if (symbol
.n_sclass
& 0x80)
928 ((struct coff_symfile_info
*) objfile
->sym_private
)->debugsec
931 coff_data (objfile
->obfd
)->local_symesz
;
938 /* Return something which points to '\0' and hope the symbol reading
939 code does something reasonable. */
945 /* Read symbols for a given partial symbol table. */
948 read_xcoff_symtab (pst
)
949 struct partial_symtab
*pst
;
951 struct objfile
*objfile
= pst
->objfile
;
952 bfd
*abfd
= objfile
->obfd
;
953 char *raw_auxptr
; /* Pointer to first raw aux entry for sym */
954 char *strtbl
= ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
;
956 ((struct coff_symfile_info
*) objfile
->sym_private
)->debugsec
;
958 struct internal_syment symbol
[1];
959 union internal_auxent main_aux
;
960 struct coff_symbol cs
[1];
961 CORE_ADDR file_start_addr
= 0;
962 CORE_ADDR file_end_addr
= 0;
964 int next_file_symnum
= -1;
965 unsigned int max_symnum
;
966 int just_started
= 1;
968 int fcn_start_addr
= 0;
970 struct coff_symbol fcn_stab_saved
;
972 /* fcn_cs_saved is global because process_xcoff_symbol needs it. */
973 union internal_auxent fcn_aux_saved
;
974 struct context_stack
*new;
976 char *filestring
= " _start_ "; /* Name of the current file. */
978 char *last_csect_name
; /* last seen csect's name and value */
979 CORE_ADDR last_csect_val
;
982 this_symtab_psymtab
= pst
;
984 /* Get the appropriate COFF "constants" related to the file we're
986 local_symesz
= coff_data (abfd
)->local_symesz
;
988 last_source_file
= NULL
;
993 start_symtab (filestring
, (char *) NULL
, file_start_addr
);
994 record_debugformat ("XCOFF");
995 symnum
= ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
997 symnum
+ ((struct symloc
*) pst
->read_symtab_private
)->numsyms
;
998 first_object_file_end
= 0;
1001 ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
1002 + symnum
* local_symesz
;
1004 while (symnum
< max_symnum
)
1007 QUIT
; /* make this command interruptable. */
1009 /* READ_ONE_SYMBOL (symbol, cs, symname_alloced); */
1010 /* read one symbol into `cs' structure. After processing the
1011 whole symbol table, only string table will be kept in memory,
1012 symbol table and debug section of xcoff will be freed. Thus
1013 we can mark symbols with names in string table as
1018 /* Swap and align the symbol into a reasonable C structure. */
1019 bfd_coff_swap_sym_in (abfd
, raw_symbol
, symbol
);
1021 cs
->c_symnum
= symnum
;
1022 cs
->c_naux
= symbol
->n_numaux
;
1023 if (symbol
->n_zeroes
)
1025 symname_alloced
= 0;
1026 /* We must use the original, unswapped, name here so the name field
1027 pointed to by cs->c_name will persist throughout xcoffread. If
1028 we use the new field, it gets overwritten for each symbol. */
1029 cs
->c_name
= ((struct external_syment
*) raw_symbol
)->e
.e_name
;
1030 /* If it's exactly E_SYMNMLEN characters long it isn't
1032 if (cs
->c_name
[E_SYMNMLEN
- 1] != '\0')
1035 p
= obstack_alloc (&objfile
->symbol_obstack
, E_SYMNMLEN
+ 1);
1036 strncpy (p
, cs
->c_name
, E_SYMNMLEN
);
1037 p
[E_SYMNMLEN
] = '\0';
1039 symname_alloced
= 1;
1042 else if (symbol
->n_sclass
& 0x80)
1044 cs
->c_name
= debugsec
+ symbol
->n_offset
;
1045 symname_alloced
= 0;
1049 /* in string table */
1050 cs
->c_name
= strtbl
+ (int) symbol
->n_offset
;
1051 symname_alloced
= 1;
1053 cs
->c_value
= symbol
->n_value
;
1054 cs
->c_sclass
= symbol
->n_sclass
;
1055 cs
->c_secnum
= symbol
->n_scnum
;
1056 cs
->c_type
= (unsigned) symbol
->n_type
;
1058 raw_symbol
+= coff_data (abfd
)->local_symesz
;
1061 /* Save addr of first aux entry. */
1062 raw_auxptr
= raw_symbol
;
1064 /* Skip all the auxents associated with this symbol. */
1065 for (ii
= symbol
->n_numaux
; ii
; --ii
)
1067 raw_symbol
+= coff_data (abfd
)->local_auxesz
;
1072 /* if symbol name starts with ".$" or "$", ignore it. */
1073 if (cs
->c_name
[0] == '$'
1074 || (cs
->c_name
[1] == '$' && cs
->c_name
[0] == '.'))
1077 if (cs
->c_symnum
== next_file_symnum
&& cs
->c_sclass
!= C_FILE
)
1079 if (last_source_file
)
1082 end_symtab (cur_src_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1087 start_symtab ("_globals_", (char *) NULL
, (CORE_ADDR
) 0);
1088 record_debugformat ("XCOFF");
1089 cur_src_end_addr
= first_object_file_end
;
1090 /* done with all files, everything from here on is globals */
1093 /* if explicitly specified as a function, treat is as one. */
1094 if (ISFCN (cs
->c_type
) && cs
->c_sclass
!= C_TPDEF
)
1096 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1097 0, cs
->c_naux
, &main_aux
);
1098 goto function_entry_point
;
1101 if ((cs
->c_sclass
== C_EXT
|| cs
->c_sclass
== C_HIDEXT
)
1104 /* Dealing with a symbol with a csect entry. */
1106 #define CSECT(PP) ((PP)->x_csect)
1107 #define CSECT_LEN(PP) (CSECT(PP).x_scnlen.l)
1108 #define CSECT_ALIGN(PP) (SMTYP_ALIGN(CSECT(PP).x_smtyp))
1109 #define CSECT_SMTYP(PP) (SMTYP_SMTYP(CSECT(PP).x_smtyp))
1110 #define CSECT_SCLAS(PP) (CSECT(PP).x_smclas)
1112 /* Convert the auxent to something we can access. */
1113 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1114 0, cs
->c_naux
, &main_aux
);
1116 switch (CSECT_SMTYP (&main_aux
))
1120 /* Ignore all external references. */
1124 /* A section description. */
1126 switch (CSECT_SCLAS (&main_aux
))
1132 /* A program csect is seen. We have to allocate one
1133 symbol table for each program csect. Normally gdb
1134 prefers one symtab for each source file. In case
1135 of AIX, one source file might include more than one
1136 [PR] csect, and they don't have to be adjacent in
1137 terms of the space they occupy in memory. Thus, one
1138 single source file might get fragmented in the
1139 memory and gdb's file start and end address
1140 approach does not work! GCC (and I think xlc) seem
1141 to put all the code in the unnamed program csect. */
1143 if (last_csect_name
)
1145 complete_symtab (filestring
, file_start_addr
);
1146 cur_src_end_addr
= file_end_addr
;
1147 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1150 /* Give all csects for this source file the same
1152 start_symtab (filestring
, NULL
, (CORE_ADDR
) 0);
1153 record_debugformat ("XCOFF");
1156 /* If this is the very first csect seen,
1157 basically `__start'. */
1160 first_object_file_end
1161 = cs
->c_value
+ CSECT_LEN (&main_aux
);
1166 cs
->c_value
+ ANOFFSET (objfile
->section_offsets
,
1167 SECT_OFF_TEXT (objfile
));
1168 file_end_addr
= file_start_addr
+ CSECT_LEN (&main_aux
);
1170 if (cs
->c_name
&& cs
->c_name
[0] == '.')
1172 last_csect_name
= cs
->c_name
;
1173 last_csect_val
= cs
->c_value
;
1174 last_csect_sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1179 /* All other symbols are put into the minimal symbol
1192 /* Ignore the symbol. */
1200 switch (CSECT_SCLAS (&main_aux
))
1203 /* a function entry point. */
1204 function_entry_point
:
1206 fcn_start_addr
= cs
->c_value
;
1208 /* save the function header info, which will be used
1209 when `.bf' is seen. */
1211 fcn_aux_saved
= main_aux
;
1215 /* shared library function trampoline code entry point. */
1219 /* The symbols often have the same names as debug symbols for
1220 functions, and confuse lookup_symbol. */
1224 /* xlc puts each variable in a separate csect, so we get
1225 an XTY_SD for each variable. But gcc puts several
1226 variables in a csect, so that each variable only gets
1227 an XTY_LD. This will typically be XMC_RW; I suspect
1228 XMC_RO and XMC_BS might be possible too.
1229 These variables are put in the minimal symbol table
1236 /* Common symbols are put into the minimal symbol table only. */
1244 switch (cs
->c_sclass
)
1249 /* c_value field contains symnum of next .file entry in table
1250 or symnum of first global after last .file. */
1252 next_file_symnum
= cs
->c_value
;
1254 /* Complete symbol table for last object file containing
1255 debugging information. */
1257 /* Whether or not there was a csect in the previous file, we
1258 have to call `end_stabs' and `start_stabs' to reset
1259 type_vector, line_vector, etc. structures. */
1261 complete_symtab (filestring
, file_start_addr
);
1262 cur_src_end_addr
= file_end_addr
;
1263 end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1266 /* XCOFF, according to the AIX 3.2 documentation, puts the filename
1267 in cs->c_name. But xlc 1.3.0.2 has decided to do things the
1268 standard COFF way and put it in the auxent. We use the auxent if
1269 the symbol is ".file" and an auxent exists, otherwise use the symbol
1270 itself. Simple enough. */
1271 if (!strcmp (cs
->c_name
, ".file") && cs
->c_naux
> 0)
1273 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1274 0, cs
->c_naux
, &main_aux
);
1275 filestring
= coff_getfilename (&main_aux
, objfile
);
1278 filestring
= cs
->c_name
;
1281 start_symtab (filestring
, (char *) NULL
, (CORE_ADDR
) 0);
1282 record_debugformat ("XCOFF");
1283 last_csect_name
= 0;
1285 /* reset file start and end addresses. A compilation unit with no text
1286 (only data) should have zero file boundaries. */
1287 file_start_addr
= file_end_addr
= 0;
1291 fcn_stab_saved
= *cs
;
1295 if (STREQ (cs
->c_name
, ".bf"))
1297 CORE_ADDR off
= ANOFFSET (objfile
->section_offsets
,
1298 SECT_OFF_TEXT (objfile
));
1299 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1300 0, cs
->c_naux
, &main_aux
);
1302 within_function
= 1;
1304 new = push_context (0, fcn_start_addr
+ off
);
1306 new->name
= define_symbol
1307 (fcn_cs_saved
.c_value
+ off
,
1308 fcn_stab_saved
.c_name
, 0, 0, objfile
);
1309 if (new->name
!= NULL
)
1310 SYMBOL_SECTION (new->name
) = SECT_OFF_TEXT (objfile
);
1312 else if (STREQ (cs
->c_name
, ".ef"))
1315 bfd_coff_swap_aux_in (abfd
, raw_auxptr
, cs
->c_type
, cs
->c_sclass
,
1316 0, cs
->c_naux
, &main_aux
);
1318 /* The value of .ef is the address of epilogue code;
1319 not useful for gdb. */
1320 /* { main_aux.x_sym.x_misc.x_lnsz.x_lnno
1321 contains number of lines to '}' */
1323 if (context_stack_depth
<= 0)
1324 { /* We attempted to pop an empty context stack */
1325 complain (&ef_complaint
, cs
->c_symnum
);
1326 within_function
= 0;
1329 new = pop_context ();
1330 /* Stack must be empty now. */
1331 if (context_stack_depth
> 0 || new == NULL
)
1333 complain (&ef_complaint
, cs
->c_symnum
);
1334 within_function
= 0;
1338 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1340 (fcn_cs_saved
.c_value
1341 + fcn_aux_saved
.x_sym
.x_misc
.x_fsize
1342 + ANOFFSET (objfile
->section_offsets
,
1343 SECT_OFF_TEXT (objfile
))),
1345 within_function
= 0;
1350 /* Begin static block. */
1352 struct internal_syment symbol
;
1354 read_symbol (&symbol
, cs
->c_value
);
1355 static_block_base
= symbol
.n_value
;
1356 static_block_section
=
1357 secnum_to_section (symbol
.n_scnum
, objfile
);
1362 /* End of static block. */
1363 static_block_base
= 0;
1364 static_block_section
= -1;
1375 static struct complaint msg
=
1376 {"Unrecognized storage class %d.", 0, 0};
1377 complain (&msg
, cs
->c_sclass
);
1391 /* beginning of include file */
1392 /* In xlc output, C_BINCL/C_EINCL pair doesn't show up in sorted
1393 order. Thus, when wee see them, we might not know enough info
1394 to process them. Thus, we'll be saving them into a table
1395 (inclTable) and postpone their processing. */
1397 record_include_begin (cs
);
1401 /* End of include file. */
1402 /* See the comment after case C_BINCL. */
1403 record_include_end (cs
);
1407 if (STREQ (cs
->c_name
, ".bb"))
1410 new = push_context (depth
,
1412 + ANOFFSET (objfile
->section_offsets
,
1413 SECT_OFF_TEXT (objfile
))));
1415 else if (STREQ (cs
->c_name
, ".eb"))
1417 if (context_stack_depth
<= 0)
1418 { /* We attempted to pop an empty context stack */
1419 complain (&eb_complaint
, cs
->c_symnum
);
1422 new = pop_context ();
1423 if (depth
-- != new->depth
)
1425 complain (&eb_complaint
, cs
->c_symnum
);
1428 if (local_symbols
&& context_stack_depth
> 0)
1430 /* Make a block for the local symbols within. */
1431 finish_block (new->name
, &local_symbols
, new->old_blocks
,
1434 + ANOFFSET (objfile
->section_offsets
,
1435 SECT_OFF_TEXT (objfile
))),
1438 local_symbols
= new->locals
;
1443 process_xcoff_symbol (cs
, objfile
);
1448 if (last_source_file
)
1452 complete_symtab (filestring
, file_start_addr
);
1453 cur_src_end_addr
= file_end_addr
;
1454 s
= end_symtab (file_end_addr
, objfile
, SECT_OFF_TEXT (objfile
));
1455 /* When reading symbols for the last C_FILE of the objfile, try
1456 to make sure that we set pst->symtab to the symtab for the
1457 file, not to the _globals_ symtab. I'm not sure whether this
1458 actually works right or when/if it comes up. */
1459 if (pst
->symtab
== NULL
)
1465 #define SYMBOL_DUP(SYMBOL1, SYMBOL2) \
1466 (SYMBOL2) = (struct symbol *) \
1467 obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); \
1468 *(SYMBOL2) = *(SYMBOL1);
1471 #define SYMNAME_ALLOC(NAME, ALLOCED) \
1472 (ALLOCED) ? (NAME) : obsavestring ((NAME), strlen (NAME), &objfile->symbol_obstack);
1475 static struct type
*func_symbol_type
;
1476 static struct type
*var_symbol_type
;
1478 /* process one xcoff symbol. */
1480 static struct symbol
*
1481 process_xcoff_symbol (cs
, objfile
)
1482 register struct coff_symbol
*cs
;
1483 struct objfile
*objfile
;
1485 struct symbol onesymbol
;
1486 register struct symbol
*sym
= &onesymbol
;
1487 struct symbol
*sym2
= NULL
;
1493 if (cs
->c_secnum
< 0)
1495 /* The value is a register number, offset within a frame, etc.,
1496 and does not get relocated. */
1502 sec
= secnum_to_section (cs
->c_secnum
, objfile
);
1503 off
= ANOFFSET (objfile
->section_offsets
, sec
);
1510 memset (sym
, '\0', sizeof (struct symbol
));
1512 /* default assumptions */
1513 SYMBOL_VALUE (sym
) = cs
->c_value
+ off
;
1514 SYMBOL_NAMESPACE (sym
) = VAR_NAMESPACE
;
1515 SYMBOL_SECTION (sym
) = secnum_to_section (cs
->c_secnum
, objfile
);
1517 if (ISFCN (cs
->c_type
))
1519 /* At this point, we don't know the type of the function. This
1520 will be patched with the type from its stab entry later on in
1521 patch_block_stabs (), unless the file was compiled without -g. */
1523 SYMBOL_NAME (sym
) = SYMNAME_ALLOC (name
, symname_alloced
);
1524 SYMBOL_TYPE (sym
) = func_symbol_type
;
1526 SYMBOL_CLASS (sym
) = LOC_BLOCK
;
1527 SYMBOL_DUP (sym
, sym2
);
1529 if (cs
->c_sclass
== C_EXT
)
1530 add_symbol_to_list (sym2
, &global_symbols
);
1531 else if (cs
->c_sclass
== C_HIDEXT
|| cs
->c_sclass
== C_STAT
)
1532 add_symbol_to_list (sym2
, &file_symbols
);
1536 /* In case we can't figure out the type, provide default. */
1537 SYMBOL_TYPE (sym
) = var_symbol_type
;
1539 switch (cs
->c_sclass
)
1542 /* The values of functions and global symbols are now resolved
1543 via the global_sym_chain in stabsread.c. */
1545 if (fcn_cs_saved
.c_sclass
== C_EXT
)
1546 add_stab_to_list (name
, &global_stabs
);
1548 add_stab_to_list (name
, &file_stabs
);
1552 add_stab_to_list (name
, &global_stabs
);
1557 common_block_start (cs
->c_name
, objfile
);
1561 common_block_end (objfile
);
1565 complain (&storclass_complaint
, cs
->c_sclass
);
1577 sym
= define_symbol (cs
->c_value
+ off
, cs
->c_name
, 0, 0, objfile
);
1580 SYMBOL_SECTION (sym
) = sec
;
1587 /* For xlc (not GCC), the 'V' symbol descriptor is used for
1588 all statics and we need to distinguish file-scope versus
1589 function-scope using within_function. We do this by
1590 changing the string we pass to define_symbol to use 'S'
1591 where we need to, which is not necessarily super-clean,
1592 but seems workable enough. */
1594 if (*name
== ':' || (pp
= (char *) strchr (name
, ':')) == NULL
)
1598 if (*pp
== 'V' && !within_function
)
1600 sym
= define_symbol ((cs
->c_value
1601 + ANOFFSET (objfile
->section_offsets
,
1602 static_block_section
)),
1603 cs
->c_name
, 0, 0, objfile
);
1606 SYMBOL_VALUE (sym
) += static_block_base
;
1607 SYMBOL_SECTION (sym
) = static_block_section
;
1616 /* Extract the file name from the aux entry of a C_FILE symbol.
1617 Result is in static storage and is only good for temporary use. */
1620 coff_getfilename (aux_entry
, objfile
)
1621 union internal_auxent
*aux_entry
;
1622 struct objfile
*objfile
;
1624 static char buffer
[BUFSIZ
];
1626 if (aux_entry
->x_file
.x_n
.x_zeroes
== 0)
1628 ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
1629 + aux_entry
->x_file
.x_n
.x_offset
);
1632 strncpy (buffer
, aux_entry
->x_file
.x_fname
, FILNMLEN
);
1633 buffer
[FILNMLEN
] = '\0';
1638 /* Set *SYMBOL to symbol number symno in symtbl. */
1640 read_symbol (symbol
, symno
)
1641 struct internal_syment
*symbol
;
1645 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->sym_private
)
1648 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->sym_private
)
1650 if (symno
< 0 || symno
>= nsyms
)
1652 static struct complaint msg
=
1653 {"Invalid symbol offset", 0, 0};
1655 symbol
->n_value
= 0;
1656 symbol
->n_scnum
= -1;
1659 bfd_coff_swap_sym_in (this_symtab_psymtab
->objfile
->obfd
,
1660 stbl
+ (symno
* local_symesz
),
1664 /* Get value corresponding to symbol number symno in symtbl. */
1667 read_symbol_nvalue (symno
)
1670 struct internal_syment symbol
[1];
1672 read_symbol (symbol
, symno
);
1673 return symbol
->n_value
;
1677 /* Find the address of the function corresponding to symno, where
1678 symno is the symbol pointed to by the linetable. */
1681 read_symbol_lineno (symno
)
1685 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->sym_private
)
1688 ((struct coff_symfile_info
*) this_symtab_psymtab
->objfile
->sym_private
)
1690 struct internal_syment symbol
[1];
1691 union internal_auxent main_aux
[1];
1695 complain (&bf_notfound_complaint
);
1699 /* Note that just searching for a short distance (e.g. 50 symbols)
1700 is not enough, at least in the following case.
1703 [many .stabx entries]
1704 [a few functions, referring to foo]
1708 What happens here is that the assembler moves the .stabx entries
1709 to right before the ".bf" for foo, but the symbol for "foo" is before
1710 all the stabx entries. See PR gdb/2222. */
1712 /* Maintaining a table of .bf entries might be preferable to this search.
1713 If I understand things correctly it would need to be done only for
1714 the duration of a single psymtab to symtab conversion. */
1715 while (symno
< nsyms
)
1717 bfd_coff_swap_sym_in (symfile_bfd
,
1718 stbl
+ (symno
* local_symesz
), symbol
);
1719 if (symbol
->n_sclass
== C_FCN
&& STREQ (symbol
->n_name
, ".bf"))
1721 symno
+= symbol
->n_numaux
+ 1;
1724 complain (&bf_notfound_complaint
);
1728 /* take aux entry and return its lineno */
1730 bfd_coff_swap_aux_in (this_symtab_psymtab
->objfile
->obfd
,
1731 stbl
+ symno
* local_symesz
,
1732 symbol
->n_type
, symbol
->n_sclass
,
1733 0, symbol
->n_numaux
, main_aux
);
1735 return main_aux
->x_sym
.x_misc
.x_lnsz
.x_lnno
;
1738 /* Support for line number handling */
1740 /* This function is called for every section; it finds the outer limits
1741 * of the line table (minimum and maximum file offset) so that the
1742 * mainline code can read the whole thing for efficiency.
1745 find_linenos (abfd
, asect
, vpinfo
)
1750 struct coff_symfile_info
*info
;
1752 file_ptr offset
, maxoff
;
1754 count
= asect
->lineno_count
;
1756 if (!STREQ (asect
->name
, ".text") || count
== 0)
1759 size
= count
* coff_data (abfd
)->local_linesz
;
1760 info
= (struct coff_symfile_info
*) vpinfo
;
1761 offset
= asect
->line_filepos
;
1762 maxoff
= offset
+ size
;
1764 if (offset
< info
->min_lineno_offset
|| info
->min_lineno_offset
== 0)
1765 info
->min_lineno_offset
= offset
;
1767 if (maxoff
> info
->max_lineno_offset
)
1768 info
->max_lineno_offset
= maxoff
;
1771 static void xcoff_psymtab_to_symtab_1 (struct partial_symtab
*);
1774 xcoff_psymtab_to_symtab_1 (pst
)
1775 struct partial_symtab
*pst
;
1777 struct cleanup
*old_chain
;
1786 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1791 /* Read in all partial symtabs on which this one is dependent */
1792 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
1793 if (!pst
->dependencies
[i
]->readin
)
1795 /* Inform about additional files that need to be read in. */
1798 fputs_filtered (" ", gdb_stdout
);
1800 fputs_filtered ("and ", gdb_stdout
);
1802 printf_filtered ("%s...", pst
->dependencies
[i
]->filename
);
1803 wrap_here (""); /* Flush output */
1804 gdb_flush (gdb_stdout
);
1806 xcoff_psymtab_to_symtab_1 (pst
->dependencies
[i
]);
1809 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0)
1811 /* Init stuff necessary for reading in symbols. */
1814 old_chain
= make_cleanup (really_free_pendings
, 0);
1816 read_xcoff_symtab (pst
);
1817 sort_symtab_syms (pst
->symtab
);
1819 do_cleanups (old_chain
);
1825 static void xcoff_psymtab_to_symtab (struct partial_symtab
*);
1827 /* Read in all of the symbols for a given psymtab for real.
1828 Be verbose about it if the user wants that. */
1831 xcoff_psymtab_to_symtab (pst
)
1832 struct partial_symtab
*pst
;
1842 (gdb_stderr
, "Psymtab for %s already read in. Shouldn't happen.\n",
1847 if (((struct symloc
*) pst
->read_symtab_private
)->numsyms
!= 0
1848 || pst
->number_of_dependencies
)
1850 /* Print the message now, before reading the string table,
1851 to avoid disconcerting pauses. */
1854 printf_filtered ("Reading in symbols for %s...", pst
->filename
);
1855 gdb_flush (gdb_stdout
);
1858 sym_bfd
= pst
->objfile
->obfd
;
1860 next_symbol_text_func
= xcoff_next_symbol_text
;
1862 xcoff_psymtab_to_symtab_1 (pst
);
1864 /* Match with global symbols. This only needs to be done once,
1865 after all of the symtabs and dependencies have been read in. */
1866 scan_file_globals (pst
->objfile
);
1868 /* Finish up the debug error message. */
1870 printf_filtered ("done.\n");
1875 xcoff_new_init (objfile
)
1876 struct objfile
*objfile
;
1878 stabsread_new_init ();
1879 buildsym_new_init ();
1882 /* Do initialization in preparation for reading symbols from OBJFILE.
1884 We will only be called if this is an XCOFF or XCOFF-like file.
1885 BFD handles figuring out the format of the file, and code in symfile.c
1886 uses BFD's determination to vector to us. */
1889 xcoff_symfile_init (objfile
)
1890 struct objfile
*objfile
;
1892 /* Allocate struct to keep track of the symfile */
1893 objfile
->sym_private
= xmmalloc (objfile
->md
,
1894 sizeof (struct coff_symfile_info
));
1896 /* XCOFF objects may be reordered, so set OBJF_REORDERED. If we
1897 find this causes a significant slowdown in gdb then we could
1898 set it in the debug symbol readers only when necessary. */
1899 objfile
->flags
|= OBJF_REORDERED
;
1901 init_entry_point_info (objfile
);
1904 /* Perform any local cleanups required when we are done with a particular
1905 objfile. I.E, we are in the process of discarding all symbol information
1906 for an objfile, freeing up all memory held for it, and unlinking the
1907 objfile struct from the global list of known objfiles. */
1910 xcoff_symfile_finish (objfile
)
1911 struct objfile
*objfile
;
1913 if (objfile
->sym_private
!= NULL
)
1915 mfree (objfile
->md
, objfile
->sym_private
);
1918 /* Start with a fresh include table for the next objfile. */
1924 inclIndx
= inclLength
= inclDepth
= 0;
1929 init_stringtab (abfd
, offset
, objfile
)
1932 struct objfile
*objfile
;
1936 unsigned char lengthbuf
[4];
1939 ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
= NULL
;
1941 if (bfd_seek (abfd
, offset
, SEEK_SET
) < 0)
1942 error ("cannot seek to string table in %s: %s",
1943 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1945 val
= bfd_read ((char *) lengthbuf
, 1, sizeof lengthbuf
, abfd
);
1946 length
= bfd_h_get_32 (abfd
, lengthbuf
);
1948 /* If no string table is needed, then the file may end immediately
1949 after the symbols. Just return with `strtbl' set to NULL. */
1951 if (val
!= sizeof lengthbuf
|| length
< sizeof lengthbuf
)
1954 /* Allocate string table from symbol_obstack. We will need this table
1955 as long as we have its symbol table around. */
1957 strtbl
= (char *) obstack_alloc (&objfile
->symbol_obstack
, length
);
1958 ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
= strtbl
;
1960 /* Copy length buffer, the first byte is usually zero and is
1961 used for stabs with a name length of zero. */
1962 memcpy (strtbl
, lengthbuf
, sizeof lengthbuf
);
1963 if (length
== sizeof lengthbuf
)
1966 val
= bfd_read (strtbl
+ sizeof lengthbuf
, 1, length
- sizeof lengthbuf
,
1969 if (val
!= length
- sizeof lengthbuf
)
1970 error ("cannot read string table from %s: %s",
1971 bfd_get_filename (abfd
), bfd_errmsg (bfd_get_error ()));
1972 if (strtbl
[length
- 1] != '\0')
1973 error ("bad symbol file: string table does not end with null character");
1978 /* If we have not yet seen a function for this psymtab, this is 0. If we
1979 have seen one, it is the offset in the line numbers of the line numbers
1981 static unsigned int first_fun_line_offset
;
1983 static struct partial_symtab
*xcoff_start_psymtab
1984 (struct objfile
*, char *, int,
1985 struct partial_symbol
**, struct partial_symbol
**);
1987 /* Allocate and partially fill a partial symtab. It will be
1988 completely filled at the end of the symbol list.
1990 SYMFILE_NAME is the name of the symbol-file we are reading from, and ADDR
1991 is the address relative to which its symbols are (incremental) or 0
1994 static struct partial_symtab
*
1995 xcoff_start_psymtab (objfile
, filename
, first_symnum
, global_syms
,
1997 struct objfile
*objfile
;
2000 struct partial_symbol
**global_syms
;
2001 struct partial_symbol
**static_syms
;
2003 struct partial_symtab
*result
=
2004 start_psymtab_common (objfile
, objfile
->section_offsets
,
2006 /* We fill in textlow later. */
2008 global_syms
, static_syms
);
2010 result
->read_symtab_private
= (char *)
2011 obstack_alloc (&objfile
->psymbol_obstack
, sizeof (struct symloc
));
2012 ((struct symloc
*) result
->read_symtab_private
)->first_symnum
= first_symnum
;
2013 result
->read_symtab
= xcoff_psymtab_to_symtab
;
2015 /* Deduce the source language from the filename for this psymtab. */
2016 psymtab_language
= deduce_language_from_filename (filename
);
2021 static struct partial_symtab
*xcoff_end_psymtab
2022 (struct partial_symtab
*, char **, int, int,
2023 struct partial_symtab
**, int, int);
2025 /* Close off the current usage of PST.
2026 Returns PST, or NULL if the partial symtab was empty and thrown away.
2028 CAPPING_SYMBOL_NUMBER is the end of pst (exclusive).
2030 INCLUDE_LIST, NUM_INCLUDES, DEPENDENCY_LIST, and NUMBER_DEPENDENCIES
2031 are the information for includes and dependencies. */
2033 static struct partial_symtab
*
2034 xcoff_end_psymtab (pst
, include_list
, num_includes
, capping_symbol_number
,
2035 dependency_list
, number_dependencies
, textlow_not_set
)
2036 struct partial_symtab
*pst
;
2037 char **include_list
;
2039 int capping_symbol_number
;
2040 struct partial_symtab
**dependency_list
;
2041 int number_dependencies
;
2042 int textlow_not_set
;
2045 struct objfile
*objfile
= pst
->objfile
;
2047 if (capping_symbol_number
!= -1)
2048 ((struct symloc
*) pst
->read_symtab_private
)->numsyms
=
2049 capping_symbol_number
2050 - ((struct symloc
*) pst
->read_symtab_private
)->first_symnum
;
2051 ((struct symloc
*) pst
->read_symtab_private
)->lineno_off
=
2052 first_fun_line_offset
;
2053 first_fun_line_offset
= 0;
2054 pst
->n_global_syms
=
2055 objfile
->global_psymbols
.next
- (objfile
->global_psymbols
.list
+ pst
->globals_offset
);
2056 pst
->n_static_syms
=
2057 objfile
->static_psymbols
.next
- (objfile
->static_psymbols
.list
+ pst
->statics_offset
);
2059 pst
->number_of_dependencies
= number_dependencies
;
2060 if (number_dependencies
)
2062 pst
->dependencies
= (struct partial_symtab
**)
2063 obstack_alloc (&objfile
->psymbol_obstack
,
2064 number_dependencies
* sizeof (struct partial_symtab
*));
2065 memcpy (pst
->dependencies
, dependency_list
,
2066 number_dependencies
* sizeof (struct partial_symtab
*));
2069 pst
->dependencies
= 0;
2071 for (i
= 0; i
< num_includes
; i
++)
2073 struct partial_symtab
*subpst
=
2074 allocate_psymtab (include_list
[i
], objfile
);
2076 subpst
->section_offsets
= pst
->section_offsets
;
2077 subpst
->read_symtab_private
=
2078 (char *) obstack_alloc (&objfile
->psymbol_obstack
,
2079 sizeof (struct symloc
));
2080 ((struct symloc
*) subpst
->read_symtab_private
)->first_symnum
= 0;
2081 ((struct symloc
*) subpst
->read_symtab_private
)->numsyms
= 0;
2082 subpst
->textlow
= 0;
2083 subpst
->texthigh
= 0;
2085 /* We could save slight bits of space by only making one of these,
2086 shared by the entire set of include files. FIXME-someday. */
2087 subpst
->dependencies
= (struct partial_symtab
**)
2088 obstack_alloc (&objfile
->psymbol_obstack
,
2089 sizeof (struct partial_symtab
*));
2090 subpst
->dependencies
[0] = pst
;
2091 subpst
->number_of_dependencies
= 1;
2093 subpst
->globals_offset
=
2094 subpst
->n_global_syms
=
2095 subpst
->statics_offset
=
2096 subpst
->n_static_syms
= 0;
2100 subpst
->read_symtab
= pst
->read_symtab
;
2103 sort_pst_symbols (pst
);
2105 /* If there is already a psymtab or symtab for a file of this name,
2106 remove it. (If there is a symtab, more drastic things also
2107 happen.) This happens in VxWorks. */
2108 free_named_symtabs (pst
->filename
);
2110 if (num_includes
== 0
2111 && number_dependencies
== 0
2112 && pst
->n_global_syms
== 0
2113 && pst
->n_static_syms
== 0)
2115 /* Throw away this psymtab, it's empty. We can't deallocate it, since
2116 it is on the obstack, but we can forget to chain it on the list. */
2117 /* Empty psymtabs happen as a result of header files which don't have
2118 any symbols in them. There can be a lot of them. */
2120 discard_psymtab (pst
);
2122 /* Indicate that psymtab was thrown away. */
2123 pst
= (struct partial_symtab
*) NULL
;
2128 static void swap_sym (struct internal_syment
*,
2129 union internal_auxent
*, char **, char **,
2130 unsigned int *, struct objfile
*);
2132 /* Swap raw symbol at *RAW and put the name in *NAME, the symbol in
2133 *SYMBOL, the first auxent in *AUX. Advance *RAW and *SYMNUMP over
2134 the symbol and its auxents. */
2137 swap_sym (symbol
, aux
, name
, raw
, symnump
, objfile
)
2138 struct internal_syment
*symbol
;
2139 union internal_auxent
*aux
;
2142 unsigned int *symnump
;
2143 struct objfile
*objfile
;
2145 bfd_coff_swap_sym_in (objfile
->obfd
, *raw
, symbol
);
2146 if (symbol
->n_zeroes
)
2148 /* If it's exactly E_SYMNMLEN characters long it isn't
2150 if (symbol
->n_name
[E_SYMNMLEN
- 1] != '\0')
2152 /* FIXME: wastes memory for symbols which we don't end up putting
2153 into the minimal symbols. */
2155 p
= obstack_alloc (&objfile
->psymbol_obstack
, E_SYMNMLEN
+ 1);
2156 strncpy (p
, symbol
->n_name
, E_SYMNMLEN
);
2157 p
[E_SYMNMLEN
] = '\0';
2161 /* Point to the unswapped name as that persists as long as the
2163 *name
= ((struct external_syment
*) *raw
)->e
.e_name
;
2165 else if (symbol
->n_sclass
& 0x80)
2167 *name
= ((struct coff_symfile_info
*) objfile
->sym_private
)->debugsec
2172 *name
= ((struct coff_symfile_info
*) objfile
->sym_private
)->strtbl
2176 *raw
+= coff_data (objfile
->obfd
)->local_symesz
;
2177 if (symbol
->n_numaux
> 0)
2179 bfd_coff_swap_aux_in (objfile
->obfd
, *raw
, symbol
->n_type
,
2180 symbol
->n_sclass
, 0, symbol
->n_numaux
, aux
);
2182 *symnump
+= symbol
->n_numaux
;
2183 *raw
+= coff_data (objfile
->obfd
)->local_symesz
* symbol
->n_numaux
;
2188 scan_xcoff_symtab (objfile
)
2189 struct objfile
*objfile
;
2191 CORE_ADDR toc_offset
= 0; /* toc offset value in data section. */
2192 char *filestring
= NULL
;
2195 int past_first_source_file
= 0;
2200 /* Current partial symtab */
2201 struct partial_symtab
*pst
;
2203 /* List of current psymtab's include files */
2204 char **psymtab_include_list
;
2205 int includes_allocated
;
2208 /* Index within current psymtab dependency list */
2209 struct partial_symtab
**dependency_list
;
2210 int dependencies_used
, dependencies_allocated
;
2213 struct internal_syment symbol
;
2214 union internal_auxent main_aux
[5];
2215 unsigned int ssymnum
;
2217 char *last_csect_name
= NULL
; /* last seen csect's name and value */
2218 CORE_ADDR last_csect_val
= 0;
2219 int last_csect_sec
= 0;
2220 int misc_func_recorded
= 0; /* true if any misc. function */
2221 int textlow_not_set
= 1;
2223 pst
= (struct partial_symtab
*) 0;
2225 includes_allocated
= 30;
2227 psymtab_include_list
= (char **) alloca (includes_allocated
*
2230 dependencies_allocated
= 30;
2231 dependencies_used
= 0;
2233 (struct partial_symtab
**) alloca (dependencies_allocated
*
2234 sizeof (struct partial_symtab
*));
2236 last_source_file
= NULL
;
2238 abfd
= objfile
->obfd
;
2240 sraw_symbol
= ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
;
2241 nsyms
= ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl_num_syms
;
2243 while (ssymnum
< nsyms
)
2245 int sclass
= ((struct external_syment
*) sraw_symbol
)->e_sclass
[0] & 0xff;
2246 /* This is the type we pass to partial-stab.h. A less kludgy solution
2247 would be to break out partial-stab.h into its various parts--shuffle
2248 off the DBXREAD_ONLY stuff to dbxread.c, and make separate
2249 pstab-norm.h (for most types), pstab-sol.h (for N_SOL), etc. */
2259 /* The CSECT auxent--always the last auxent. */
2260 union internal_auxent csect_aux
;
2261 unsigned int symnum_before
= ssymnum
;
2263 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2265 if (symbol
.n_numaux
> 1)
2267 bfd_coff_swap_aux_in
2269 sraw_symbol
- coff_data (abfd
)->local_symesz
,
2272 symbol
.n_numaux
- 1,
2277 csect_aux
= main_aux
[0];
2279 /* If symbol name starts with ".$" or "$", ignore it. */
2280 if (namestring
[0] == '$'
2281 || (namestring
[0] == '.' && namestring
[1] == '$'))
2284 switch (csect_aux
.x_csect
.x_smtyp
& 0x7)
2287 switch (csect_aux
.x_csect
.x_smclas
)
2290 if (last_csect_name
)
2292 /* If no misc. function recorded in the last
2293 seen csect, enter it as a function. This
2294 will take care of functions like strcmp()
2297 if (!misc_func_recorded
)
2299 RECORD_MINIMAL_SYMBOL
2300 (last_csect_name
, last_csect_val
,
2301 mst_text
, last_csect_sec
,
2307 /* We have to allocate one psymtab for
2308 each program csect, because their text
2309 sections need not be adjacent. */
2311 (pst
, psymtab_include_list
, includes_used
,
2312 symnum_before
, dependency_list
,
2313 dependencies_used
, textlow_not_set
);
2315 dependencies_used
= 0;
2316 /* Give all psymtabs for this source file the same
2318 pst
= xcoff_start_psymtab
2322 objfile
->global_psymbols
.next
,
2323 objfile
->static_psymbols
.next
);
2326 if (namestring
&& namestring
[0] == '.')
2328 last_csect_name
= namestring
;
2329 last_csect_val
= symbol
.n_value
;
2331 secnum_to_section (symbol
.n_scnum
, objfile
);
2336 symbol
.n_value
+ csect_aux
.x_csect
.x_scnlen
.l
;
2337 if (highval
> pst
->texthigh
)
2338 pst
->texthigh
= highval
;
2339 if (pst
->textlow
== 0 || symbol
.n_value
< pst
->textlow
)
2340 pst
->textlow
= symbol
.n_value
;
2342 misc_func_recorded
= 0;
2346 /* Data variables are recorded in the minimal symbol
2347 table, except for section symbols. */
2348 if (*namestring
!= '.')
2349 prim_record_minimal_symbol_and_info
2350 (namestring
, symbol
.n_value
,
2351 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2352 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2358 warning ("More than one XMC_TC0 symbol found.");
2359 toc_offset
= symbol
.n_value
;
2361 /* Make TOC offset relative to start address of section. */
2362 bfd_sect
= secnum_to_bfd_section (symbol
.n_scnum
, objfile
);
2364 toc_offset
-= bfd_section_vma (objfile
->obfd
, bfd_sect
);
2368 /* These symbols tell us where the TOC entry for a
2369 variable is, not the variable itself. */
2378 switch (csect_aux
.x_csect
.x_smclas
)
2381 /* A function entry point. */
2383 if (first_fun_line_offset
== 0 && symbol
.n_numaux
> 1)
2384 first_fun_line_offset
=
2385 main_aux
[0].x_sym
.x_fcnary
.x_fcn
.x_lnnoptr
;
2386 RECORD_MINIMAL_SYMBOL
2387 (namestring
, symbol
.n_value
,
2388 sclass
== C_HIDEXT
? mst_file_text
: mst_text
,
2389 secnum_to_section (symbol
.n_scnum
, objfile
),
2394 /* shared library function trampoline code entry
2397 /* record trampoline code entries as
2398 mst_solib_trampoline symbol. When we lookup mst
2399 symbols, we will choose mst_text over
2400 mst_solib_trampoline. */
2401 RECORD_MINIMAL_SYMBOL
2402 (namestring
, symbol
.n_value
,
2403 mst_solib_trampoline
,
2404 secnum_to_section (symbol
.n_scnum
, objfile
),
2409 /* The symbols often have the same names as
2410 debug symbols for functions, and confuse
2416 /* xlc puts each variable in a separate csect,
2417 so we get an XTY_SD for each variable. But
2418 gcc puts several variables in a csect, so
2419 that each variable only gets an XTY_LD. We
2420 still need to record them. This will
2421 typically be XMC_RW; I suspect XMC_RO and
2422 XMC_BS might be possible too. */
2423 if (*namestring
!= '.')
2424 prim_record_minimal_symbol_and_info
2425 (namestring
, symbol
.n_value
,
2426 sclass
== C_HIDEXT
? mst_file_data
: mst_data
,
2427 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2434 switch (csect_aux
.x_csect
.x_smclas
)
2438 /* Common variables are recorded in the minimal symbol
2439 table, except for section symbols. */
2440 if (*namestring
!= '.')
2441 prim_record_minimal_symbol_and_info
2442 (namestring
, symbol
.n_value
,
2443 sclass
== C_HIDEXT
? mst_file_bss
: mst_bss
,
2444 NULL
, secnum_to_section (symbol
.n_scnum
, objfile
),
2457 unsigned int symnum_before
;
2459 symnum_before
= ssymnum
;
2460 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2463 /* See if the last csect needs to be recorded. */
2465 if (last_csect_name
&& !misc_func_recorded
)
2468 /* If no misc. function recorded in the last seen csect, enter
2469 it as a function. This will take care of functions like
2470 strcmp() compiled by xlc. */
2472 RECORD_MINIMAL_SYMBOL
2473 (last_csect_name
, last_csect_val
,
2474 mst_text
, last_csect_sec
, objfile
);
2479 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2480 symnum_before
, dependency_list
,
2481 dependencies_used
, textlow_not_set
);
2483 dependencies_used
= 0;
2485 first_fun_line_offset
= 0;
2487 /* XCOFF, according to the AIX 3.2 documentation, puts the
2488 filename in cs->c_name. But xlc 1.3.0.2 has decided to
2489 do things the standard COFF way and put it in the auxent.
2490 We use the auxent if the symbol is ".file" and an auxent
2491 exists, otherwise use the symbol itself. */
2492 if (!strcmp (namestring
, ".file") && symbol
.n_numaux
> 0)
2494 filestring
= coff_getfilename (&main_aux
[0], objfile
);
2497 filestring
= namestring
;
2499 pst
= xcoff_start_psymtab (objfile
,
2502 objfile
->global_psymbols
.next
,
2503 objfile
->static_psymbols
.next
);
2504 last_csect_name
= NULL
;
2510 static struct complaint msg
=
2511 {"Storage class %d not recognized during scan", 0, 0};
2512 complain (&msg
, sclass
);
2516 /* C_FCN is .bf and .ef symbols. I think it is sufficient
2517 to handle only the C_FUN and C_EXT. */
2532 /* C_EINCL means we are switching back to the main file. But there
2533 is no reason to care; the only thing we want to know about
2534 includes is the names of all the included (.h) files. */
2539 /* I don't think C_STAT is used in xcoff; C_HIDEXT appears to be
2543 /* I don't think the name of the common block (as opposed to the
2544 variables within it) is something which is user visible
2552 /* I think we can ignore C_LSYM; types on xcoff seem to use C_DECL
2553 so C_LSYM would appear to be only for locals. */
2559 /* We probably could save a few instructions by assuming that
2560 C_LSYM, C_PSYM, etc., never have auxents. */
2562 ((struct external_syment
*) sraw_symbol
)->e_numaux
[0] + 1;
2564 sraw_symbol
+= sizeof (struct external_syment
) * naux1
;
2573 /* The value of the C_FUN is not the address of the function (it
2574 appears to be the address before linking), but as long as it
2575 is smaller than the actual address, then find_pc_partial_function
2576 will use the minimal symbols instead. I hope. */
2584 swap_sym (&symbol
, &main_aux
[0], &namestring
, &sraw_symbol
,
2586 #define CUR_SYMBOL_TYPE stype
2587 #define CUR_SYMBOL_VALUE symbol.n_value
2589 /* START_PSYMTAB and END_PSYMTAB are never used, because they are only
2590 called from DBXREAD_ONLY or N_SO code. Likewise for the symnum
2592 #define START_PSYMTAB(ofile,fname,low,symoff,global_syms,static_syms) 0
2593 #define END_PSYMTAB(pst,ilist,ninc,c_off,c_text,dep_list,n_deps,textlow_not_set)\
2595 /* We have already set the namestring. */
2596 #define SET_NAMESTRING() /* */
2598 #include "partial-stab.h"
2604 xcoff_end_psymtab (pst
, psymtab_include_list
, includes_used
,
2605 ssymnum
, dependency_list
,
2606 dependencies_used
, textlow_not_set
);
2609 /* Record the toc offset value of this symbol table into objfile structure.
2610 If no XMC_TC0 is found, toc_offset should be zero. Another place to obtain
2611 this information would be file auxiliary header. */
2613 ((struct coff_symfile_info
*) objfile
->sym_private
)->toc_offset
= toc_offset
;
2616 /* Return the toc offset value for a given objfile. */
2619 get_toc_offset (objfile
)
2620 struct objfile
*objfile
;
2623 return ((struct coff_symfile_info
*) objfile
->sym_private
)->toc_offset
;
2627 /* Scan and build partial symbols for a symbol file.
2628 We have been initialized by a call to dbx_symfile_init, which
2629 put all the relevant info into a "struct dbx_symfile_info",
2630 hung off the objfile structure.
2632 SECTION_OFFSETS contains offsets relative to which the symbols in the
2633 various sections are (depending where the sections were actually loaded).
2634 MAINLINE is true if we are reading the main symbol
2635 table (as opposed to a shared lib or dynamically loaded file). */
2638 xcoff_initial_scan (objfile
, mainline
)
2639 struct objfile
*objfile
;
2640 int mainline
; /* FIXME comments above */
2644 struct cleanup
*back_to
;
2645 int num_symbols
; /* # of symbols */
2646 file_ptr symtab_offset
; /* symbol table and */
2647 file_ptr stringtab_offset
; /* string table file offsets */
2648 struct coff_symfile_info
*info
;
2652 info
= (struct coff_symfile_info
*) objfile
->sym_private
;
2653 symfile_bfd
= abfd
= objfile
->obfd
;
2654 name
= objfile
->name
;
2656 num_symbols
= bfd_get_symcount (abfd
); /* # of symbols */
2657 symtab_offset
= obj_sym_filepos (abfd
); /* symbol table file offset */
2658 stringtab_offset
= symtab_offset
+
2659 num_symbols
* coff_data (abfd
)->local_symesz
;
2661 info
->min_lineno_offset
= 0;
2662 info
->max_lineno_offset
= 0;
2663 bfd_map_over_sections (abfd
, find_linenos
, info
);
2665 if (num_symbols
> 0)
2667 /* Read the string table. */
2668 init_stringtab (abfd
, stringtab_offset
, objfile
);
2670 /* Read the .debug section, if present. */
2673 bfd_size_type length
;
2674 char *debugsec
= NULL
;
2676 secp
= bfd_get_section_by_name (abfd
, ".debug");
2679 length
= bfd_section_size (abfd
, secp
);
2683 (char *) obstack_alloc (&objfile
->symbol_obstack
, length
);
2685 if (!bfd_get_section_contents (abfd
, secp
, debugsec
,
2686 (file_ptr
) 0, length
))
2688 error ("Error reading .debug section of `%s': %s",
2689 name
, bfd_errmsg (bfd_get_error ()));
2693 ((struct coff_symfile_info
*) objfile
->sym_private
)->debugsec
=
2698 /* Read the symbols. We keep them in core because we will want to
2699 access them randomly in read_symbol*. */
2700 val
= bfd_seek (abfd
, symtab_offset
, SEEK_SET
);
2702 error ("Error reading symbols from %s: %s",
2703 name
, bfd_errmsg (bfd_get_error ()));
2704 size
= coff_data (abfd
)->local_symesz
* num_symbols
;
2705 ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
=
2706 obstack_alloc (&objfile
->symbol_obstack
, size
);
2707 ((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl_num_syms
=
2710 val
= bfd_read (((struct coff_symfile_info
*) objfile
->sym_private
)->symtbl
,
2713 perror_with_name ("reading symbol table");
2715 /* If we are reinitializing, or if we have never loaded syms yet, init */
2717 || objfile
->global_psymbols
.size
== 0
2718 || objfile
->static_psymbols
.size
== 0)
2719 /* I'm not sure how how good num_symbols is; the rule of thumb in
2720 init_psymbol_list was developed for a.out. On the one hand,
2721 num_symbols includes auxents. On the other hand, it doesn't
2723 init_psymbol_list (objfile
, num_symbols
);
2725 free_pending_blocks ();
2726 back_to
= make_cleanup (really_free_pendings
, 0);
2728 init_minimal_symbol_collection ();
2729 make_cleanup_discard_minimal_symbols ();
2731 /* Now that the symbol table data of the executable file are all in core,
2732 process them and define symbols accordingly. */
2734 scan_xcoff_symtab (objfile
);
2736 /* Install any minimal symbols that have been collected as the current
2737 minimal symbols for this objfile. */
2739 install_minimal_symbols (objfile
);
2741 do_cleanups (back_to
);
2745 xcoff_symfile_offsets (objfile
, addrs
)
2746 struct objfile
*objfile
;
2747 struct section_addr_info
*addrs
;
2749 asection
*sect
= NULL
;
2752 objfile
->num_sections
= SECT_OFF_MAX
;
2753 objfile
->section_offsets
= (struct section_offsets
*)
2754 obstack_alloc (&objfile
->psymbol_obstack
, SIZEOF_SECTION_OFFSETS
);
2756 /* Initialize the section indexes for future use. */
2757 sect
= bfd_get_section_by_name (objfile
->obfd
, ".text");
2759 objfile
->sect_index_text
= sect
->index
;
2761 sect
= bfd_get_section_by_name (objfile
->obfd
, ".data");
2763 objfile
->sect_index_data
= sect
->index
;
2765 sect
= bfd_get_section_by_name (objfile
->obfd
, ".bss");
2767 objfile
->sect_index_bss
= sect
->index
;
2769 sect
= bfd_get_section_by_name (objfile
->obfd
, ".rodata");
2771 objfile
->sect_index_rodata
= sect
->index
;
2773 for (i
= 0; i
< objfile
->num_sections
; ++i
)
2775 /* syms_from_objfile kindly subtracts from addr the
2776 bfd_section_vma of the .text section. This strikes me as
2777 wrong--whether the offset to be applied to symbol reading is
2778 relative to the start address of the section depends on the
2779 symbol format. In any event, this whole "addr" concept is
2780 pretty broken (it doesn't handle any section but .text
2781 sensibly), so just ignore the addr parameter and use 0.
2782 rs6000-nat.c will set the correct section offsets via
2783 objfile_relocate. */
2784 ANOFFSET (objfile
->section_offsets
, i
) = 0;
2788 /* Register our ability to parse symbols for xcoff BFD files. */
2790 static struct sym_fns xcoff_sym_fns
=
2793 /* Because the bfd uses coff_flavour, we need to specially kludge
2794 the flavour. It is possible that coff and xcoff should be merged as
2795 they do have fundamental similarities (for example, the extra storage
2796 classes used for stabs could presumably be recognized in any COFF file).
2797 However, in addition to obvious things like all the csect hair, there are
2798 some subtler differences between xcoffread.c and coffread.c, notably
2799 the fact that coffread.c has no need to read in all the symbols, but
2800 xcoffread.c reads all the symbols and does in fact randomly access them
2801 (in C_BSTAT and line number processing). */
2803 (enum bfd_flavour
) -1,
2805 xcoff_new_init
, /* sym_new_init: init anything gbl to entire symtab */
2806 xcoff_symfile_init
, /* sym_init: read initial info, setup for sym_read() */
2807 xcoff_initial_scan
, /* sym_read: read a symbol file into symtab */
2808 xcoff_symfile_finish
, /* sym_finish: finished with file, cleanup */
2809 xcoff_symfile_offsets
, /* sym_offsets: xlate offsets ext->int form */
2810 NULL
/* next: pointer to next struct sym_fns */
2814 _initialize_xcoffread ()
2816 add_symtab_fns (&xcoff_sym_fns
);
2818 func_symbol_type
= init_type (TYPE_CODE_FUNC
, 1, 0,
2819 "<function, no debug info>", NULL
);
2820 TYPE_TARGET_TYPE (func_symbol_type
) = builtin_type_int
;
2822 init_type (TYPE_CODE_INT
, TARGET_INT_BIT
/ HOST_CHAR_BIT
, 0,
2823 "<variable, no debug info>", NULL
);